CN117123738A - Casting device for automobile gearbox shell - Google Patents

Abstract

The application provides a casting device for an automobile gearbox shell, which relates to the field of casting of automobile shells and comprises a portal support (10), a positioning plate (20), an upper die (30) and a lower die (40), wherein the positioning plate (20) is rotatably arranged on two side surfaces of the portal support (10), the upper die (30) and the lower die (40) are arranged between the portal support and the portal support, two sides of the upper die (30) are connected with the positioning plate (20) through a shaking mechanism, a male die (31) is arranged at the lower end of the upper die, two sides of the lower die (40) are connected with the positioning plate (20) through a telescopic connecting mechanism (45), grooves (41) are formed in the middle of the lower die, locking mechanisms are uniformly arranged on boss outer rings of the lower die (40), and the locking mechanisms are connected with the upper die (30) through connecting sliding rods (50). The casting device can realize that casting liquid can quickly, uniformly and fully fill the inner cavity of the die in the casting process, so that the quality of a cast shell is ensured; simultaneously, this casting device can be convenient for drawing of patterns and take.

Description

A casting device for automobile gearbox housing

Technical field

The invention relates to the technical field of automobile casing casting, and in particular to a casting device for automobile gearbox casings.

Background technique

The gearbox housing is a structure used to install the transmission transmission mechanism and its accessories. It mainly produces speed changes and pitch changes by setting different gear combinations and hydraulic systems to achieve changes in rotational speed. At present, the gearbox housing is mainly obtained by casting, that is, a closed multi-faceted structure of a certain shape is used as a mold for the preform, and the casting material (usually aluminum alloy) heated into liquid is passed into the mold. After the liquid casting material is cooled, the formed shell blank or part is obtained.

However, the current gearbox housing (especially in the field of commercial vehicles, such as trucks, buses, tractors, etc.) is subject to vehicle space limitations and diverse functional requirements, and its overall structure is relatively complex, resulting in its corresponding casting mold. The shape of the inner cavity is irregular, which prevents the casting liquid from evenly and smoothly penetrating into all positions of the inner cavity of the casting mold during the casting process. Bubbles, holes or cracks appear after the shell is cast. The thickness of the shell does not meet product requirements and the casting uniformity Or there are problems such as poor consistency and the inability to complete the overall casting of the shell, which in turn leads to an increase in the casting failure rate, a decrease in casting efficiency, and an increase in casting costs. At the same time, after the existing shell is cast, cooled and formed, the shell blank or parts are easy to fit closely with the mold, causing the shell blank or parts to be inconvenient to take, which greatly affects the shell casting efficiency. , slow down the casting rhythm, and forced demoulding can easily damage the cast blanks or parts and increase the failure rate of the parts.

Contents of the invention

In view of the problems existing in the above prior art, the purpose of the present invention is to provide a casting device for an automobile gearbox housing. During the casting process, the casting device realizes the overall shaking of the mold through slight swing and translation of the mold, and thereby achieves overall shaking of the mold. It ensures that the casting liquid can flow quickly and evenly to the irregular inner cavity of the casting mold, ensuring the overall quality and uniformity of the casting shell; at the same time, after completing the casting, the casting device realizes the demoulding of the blank or part by flipping the mold, which is convenient The handling of blanks or parts after casting can effectively improve the handling efficiency and reduce the probability of damaging parts during the handling process.

The object of the present invention is achieved through the following technical solutions:

A casting device for automobile gearbox housing, including a door-shaped bracket, a positioning plate, an upper mold and a lower mold. There are two positioning plates and they are respectively rotatably arranged on the opposite sides of both sides of the door-shaped bracket. The two positioning plates are parallel. Setup; the upper mold and the lower mold are set between the two positioning plates in sequence from top to bottom. Both sides of the upper mold are connected to the corresponding positioning plates through a shaking mechanism, and a punch is set in the middle of the lower end of the upper mold. The cross section of the lower mold is " The lower mold has a "convex"-shaped structure, and both sides of the lower mold are connected to the corresponding positioning plates through telescopic connection mechanisms. The middle of the lower mold boss (i.e., the protruding part of the "convex"-shaped structure) has a groove corresponding to the punch, and the outer ring of the boss (around The locking mechanism is evenly arranged along the central axis of the lower mold, and the locking mechanism is connected to the upper mold through a connecting slide rod.

Based on the further optimization of the above solution, the positioning plates are rotated on both sides of the door-shaped bracket through rotating shafts, and the central axes of the two rotating shafts are collinear.

Based on the further optimization of the above solution, a first sliding cavity is opened inside the upper mold, and an iron core block is slidably arranged in the first sliding cavity; horizontal slide grooves are respectively opened in the upper mold corresponding to the locking mechanism of the outer ring of the first sliding cavity and the horizontal The chute is connected with the first sliding cavity; the outer wall of the iron core block is provided with a connecting rod corresponding to the horizontal chute, and the connecting rod is slidingly connected to the horizontal chute; the connecting slide rod is arranged from top to bottom into an upper thick rod section, a thin rod section and The diameter of the lower thick rod section is the same as that of the lower thick rod section and larger than the thin rod section. The upper mold has a vertical hole corresponding to the connecting slide rod and the vertical hole is connected to the corresponding horizontal chute. The connecting slide rod is away from the lock. One end of the tightening mechanism penetrates the corresponding vertical hole and the thin rod section connecting the sliding rod penetrates the corresponding connecting rod. The connecting rod has a sliding hole corresponding to the thin rod section connecting the sliding rod and the diameter of the sliding hole is smaller than the upper thick rod section (or the lower thick rod). segment) diameter.

Based on further optimization of the above solution, the shaking mechanism includes a sliding seat, a telescopic assembly, a first gear rod, an incomplete gear, a first bevel gear, a second gear rod, a second bevel gear, a driven gear and a ring; sliding The side of the seat away from the upper mold is slidingly connected to the corresponding positioning plate, and a tooth cavity is provided in the sliding seat; the telescopic component is rotated and installed in the tooth cavity, and the telescopic component is connected to the corresponding side wall of the upper mold; the tooth cavity is located on the lower side of the telescopic component The first gear rod is rotated and the outer wall of the first gear rod is sleeved with the incomplete gear and the first bevel gear in sequence; the second gear rod is rotated and installed at the bottom of the sliding seat and the second gear rod penetrates the bottom surface of the sliding seat, and the second gear rod is located in the tooth cavity The outer wall of the telescopic assembly is fixedly socketed with the second bevel gear, and the second bevel gear meshes with the first bevel gear; the outer wall of the telescopic component located in the tooth cavity is fixedly socketed with the driven gear, and the driven gear can mesh with the incomplete gear; the driven gear is with the incomplete gear. The outer ring of the complete gear is provided with a ring ring, and the outer wall of the ring ring is rotationally connected to the inner wall of the tooth cavity. The inner ring of the ring ring meshes with the driven gear and can mesh with the incomplete gear.

Based on further optimization of the above solution, the telescopic assembly includes a first sliding sleeve, a first sliding rod and a first spring. One end of the first sliding sleeve is rotationally connected to the side wall of the tooth cavity, and the other end penetrates through the side wall of the corresponding sliding seat and is rotationally connected. , the first sliding rod is coaxially arranged on one end of the first sliding sleeve close to the upper mold and is slidingly connected to the first sliding sleeve. One end of the first sliding rod close to the upper mold is fixedly connected to the side wall of the upper mold, and the other end is fixedly connected to the side wall of the upper mold. The inner wall of the sleeve is connected through the first spring.

Based on further optimization of the above solution, the outer wall of the second gear rod located outside the sliding seat is fixed with a sleeve cam, and the cams on both sides of the upper mold are in opposite directions.

Based on the further optimization of the above solution, a hydraulic lifting mechanism is installed on the top of the door-shaped bracket and an electromagnet is installed on the lower end of the hydraulic lifting mechanism to control the upward and downward lifting of the upper mold.

Based on the further optimization of the above solution, a feed through hole is provided in the upper mold and located on the outer ring of the first sliding cavity and penetrates the upper mold. The feed through hole and the horizontal chute are arranged in different positions for the introduction of casting liquid.

Based on further optimization of the above solution, the telescopic connection mechanism includes a second sliding sleeve, a second sliding rod and a second spring. The positioning plate corresponds to the second sliding sleeve and has an arc-shaped slide groove centered on the axis of the first sliding rod. The end of the two sliding sleeves away from the lower mold is clamped in the corresponding arcuate chute and is slidingly connected; the end of the second sliding sleeve close to the lower mold is coaxially provided with a second sliding rod and the second sliding rod is slidingly connected to the second sliding sleeve. One end of the second slide rod away from the lower mold is connected to the inner wall of the second sliding sleeve through a second spring, and the other end is fixedly connected to the corresponding side wall of the lower mold.

Based on the further optimization of the above solution, the locking mechanism includes a positioning block and a lightweight spring. The positioning block is slidably arranged on the end surface around the lower mold boss, and the side wall of the lower mold boss has a positioning groove corresponding to the positioning block. The positioning block is close to the lower mold. One side of the boss is connected to the inside of the positioning groove through a lightweight spring; the upper end of the positioning block is provided with an inclined chute that is inclined from the middle of the lower mold to the surroundings, and the bottom of the connecting slide rod is stuck in the corresponding inclined chute and is slidingly connected.

In order to facilitate the demoulding of the molded shell blank or parts, and thus facilitate the removal, based on the further optimization of the above solution, a second sliding cavity is opened inside the lower mold and a gravity block is slidably installed in the second sliding cavity. A plurality of "L"-shaped ejector pins are evenly arranged on the wall and around its axis. An "L"-shaped chute is provided inside the lower mold corresponding to the "L"-shaped ejector pins. The "L"-shaped ejector pins can slide in the "L"-shaped chute. And the width of the transverse groove of the "L"-shaped chute is greater than the diameter of the transverse rod of the "L"-shaped push rod.

The following are the technical effects of the present invention:

This application uses the setting of the shaking mechanism, specifically: sliding seat, telescopic assembly, first gear rod, incomplete gear, first bevel gear, second gear rod, second bevel gear, driven gear, ring gear and cam, The cooperation of the telescopic connection mechanism uses the small-angle rotation and left and right translation of the upper mold to drive the lower mold to small swing and left and right translation, that is, the compound shaking of the upper and lower molds is realized, allowing the casting liquid to flow fully, quickly, and evenly , effectively fill the casting cavity formed by the upper mold and the lower mold to avoid the situation where the casting liquid does not completely fill the casting cavity and part of the casting liquid condenses to form, which in turn leads to insufficient casting, insufficient shell thickness, and prone to pores. Or problems such as cracks. In addition, this application realizes the close integration of the upper mold and the lower mold during the casting process (that is, self-locking during the casting process) through the cooperation of the internal structures, connecting slide rods, and locking mechanisms of the upper mold and the lower mold, thereby avoiding The casting liquid splashes due to the shaking of the shaking mechanism, which affects the external casting environment and even causes safety accidents. At the same time, the close fit of the upper mold and the lower mold ensures the structural stability of the casting cavity during the casting process and avoids the casting mold caused by the shaking process. The deviation of the cavity affects the final molding quality.

This application realizes the reverse flipping of the upper mold and the lower mold through the cooperation of the positioning plate, the upper mold, the lower mold, the shaking mechanism, the locking mechanism and the connecting slide rod, thereby using the flipping to complete the automatic separation of the upper mold and the lower mold, which facilitates casting. The completed blanks or parts are demoulded to facilitate the removal of the blanks or parts, and avoid problems such as damage to the blanks or parts caused by forced demoulding, affecting casting efficiency, and increasing casting costs.

This application has a simple overall structure, convenient casting, and high processing efficiency. It can be effectively used in the casting of gearbox casings for various automobiles (especially commercial vehicles such as trucks, buses, and tractors), with high casting quality and low defective rate.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the casting device in an embodiment of the present invention.

Figure 2 is a partial enlarged view of A in Figure 1.

Fig. 3 is a cross-sectional view along E-E direction in Fig. 2 .

Figure 4 is a partial enlarged view of B in Figure 1.

Fig. 5 is a cross-sectional view taken along line C-C in Fig. 1 .

Fig. 6 is a cross-sectional view taken along line D-D in Fig. 1 .

Figure 7 is a front view of one side of the positioning plate of the casting device in the embodiment of the present invention.

Figure 8 is an initial state diagram of the casting device in the embodiment of the present invention.

Among them, 10. Door-shaped bracket; 11. Hydraulic lifting mechanism; 12. Electromagnet; 20. Positioning plate; 21. Rotating shaft; 22. Vertical chute; 23. Arc chute; 30. Upper mold; 31. Projection Mold; 32. First sliding cavity; 320. Iron core block; 33. Horizontal chute; 330. Connecting rod; 34. Vertical hole; 35. Feed through hole; 40. Lower mold; 41. Groove; 42 , second sliding chamber; 420, gravity block; 43, "L" shaped chute; 430, "L" shaped ejector rod; 44, positioning groove; 45, telescopic connection mechanism; 50, connecting slide rod; 600, cam; 61. Sliding seat; 610. Tooth cavity; 62. Telescopic assembly; 63. First gear rod; 64. Incomplete gear; 65. First bevel gear; 66. Second gear rod; 67. Second bevel gear; 68 , driven gear; 69, ring gear; 71, positioning block; 710, inclined chute; 72, lightweight spring.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention.

Example 1

Refer to the figure below: a casting device for automobile gearbox housings, including a portal bracket 10, a positioning plate 20, an upper mold 30 and a lower mold 40. As shown in Figure 1: the positioning plate 20 is in two pieces and they are respectively The opposite sides on both sides of the portal bracket 10 are rotated by the rotating shaft 21 (see Figure 1: the left side of the left positioning plate 20 is rotationally connected to the left support plate of the portal bracket 10 through the rotating shaft 21, and the right positioning plate 20 The right side of the door-shaped bracket 10 is rotatably connected to the right support plate of the door-shaped bracket 10 through the rotating shaft 21). The two positioning plates 20 are arranged in parallel and the two rotating shafts 21 are arranged coaxially (that is, the central axes of the two rotating shafts 21 are collinear). The rotating shaft 21 can pass The motor arranged on the support plate on the side of the door-shaped bracket 10 controls its rotation.

An upper mold 30 and a lower mold 40 are arranged between the two positioning plates 20 and in sequence from top to bottom. Both sides of the upper mold 30 are connected to the corresponding positioning plates 20 through shaking mechanisms, and a punch 31 is provided in the middle of the lower end of the upper mold 30. The cross-section of the mold 40 is a "convex"-shaped structure, and both sides of the lower mold 40 are connected to the corresponding positioning plates 20 through telescopic connection mechanisms 45. (shown) There is a groove 41 in the middle corresponding to the punch 31, and a locking mechanism is evenly arranged on the outer ring of the boss (around the central axis of the mold 40). In this embodiment, the number of locking mechanisms is six groups, and the locking mechanism is connected by a sliding rod. 50 is connected with the upper mold 30 (since there are six sets of locking mechanisms, there are six corresponding connecting slide bars 50 in this embodiment).

Specifically: a first sliding cavity 32 is provided inside the upper mold 30 and an iron core block 320 is slidably provided in the first sliding cavity 32; horizontal slide grooves 33 are respectively provided inside the upper mold 30 corresponding to the locking mechanisms in the outer ring of the first sliding cavity 32 and The horizontal chute 33 is connected with the first sliding chamber 32 (refer to Figure 5, since there are six groups of locking mechanisms in this embodiment, there are six horizontal chute 33 evenly arranged on the outer ring of the first sliding chamber 32); iron The outer wall of the core block 320 is provided with a connecting rod 330 corresponding to the horizontal chute 33. The outer wall of the connecting rod 330 is slidingly connected to the inner wall of the horizontal chute 33; the connecting slide rod 50 is arranged from top to bottom in an upper thick rod section, a thin rod section and a lower thick rod section. Rod section, the diameter of the upper thick rod section is consistent with the diameter of the lower thick rod section and is larger than the thin rod section (refer to Figure 1), the upper mold 30 is correspondingly connected to the sliding rod 50 (specifically: the upper thick rod section connected to the sliding rod 50 or A vertical hole 34 is opened in the lower thick rod section, and the vertical hole 34 is connected with the corresponding horizontal chute 33. One end of the connecting slide rod 50 away from the locking mechanism penetrates the corresponding vertical hole 34, and the thin rod section of the connecting slide rod 50 penetrates The corresponding connecting rod 330 has a sliding hole corresponding to the thin rod section connected to the sliding rod 50, and the diameter of the sliding hole is smaller than the diameter of the upper thick rod section (or lower thick rod section) (that is, through the upper thick rod section and the lower thick rod section) A hard limit is formed on the relative sliding between the connecting sliding rod 50 and the connecting rod 330).

The shaking mechanism includes a sliding seat 61, a telescopic assembly 62, a first gear rod 63, an incomplete gear 64, a first bevel gear 65, a second gear rod 66, a second bevel gear 67, a driven gear 68 and a ring gear 69; sliding The side of the seat 61 away from the upper mold 30 is slidingly connected to the corresponding positioning plate 20 (for example: two positioning plates 20 have vertical chute 22 on the opposite side, as shown in Figure 7, the sliding seat 61 is away from the side of the upper mold 30 A vertical slider is provided on one side and corresponding to the vertical slider 22. The vertical slider is stuck in the corresponding vertical slider 22 and is slidingly connected) and a tooth cavity 610 is provided in the sliding seat 61 (see Figure 2). . The telescopic component 62 is rotatably arranged in the tooth cavity 610 and is connected to the corresponding side wall of the upper mold 30. The telescopic component 62 specifically includes a first sliding sleeve, a first sliding rod and a first spring. Refer to Figure 2 as shown: first One end of the sliding sleeve (i.e., the left end shown in Figure 2) is rotatably connected to the side wall of the tooth cavity 610, and the other end (i.e., the right end shown in Figure 2) penetrates the corresponding side wall of the sliding seat 61 and is rotatably connected. The first slide rod is coaxially arranged on the third A sliding sleeve is close to one end of the upper mold 30 (i.e., the right end shown in Figure 2) and is slidingly connected with the first sliding sleeve. The other end (i.e., the left end shown in Figure 2) is fixedly connected and connected to the inner wall of the first sliding sleeve through a first spring. The tooth cavity 610 is located on the lower side of the telescopic assembly 62 and is provided with a first gear rod 63 for rotation (that is, the two ends of the first gear rod 63 are respectively rotatably connected to the side walls of the tooth cavity 610), and the outer wall of the first gear rod 63 is sleeved with incomplete gears in sequence. 64 and the first bevel gear 65, the first gear rod 63 controls its rotation through a motor arranged in the sliding seat 61; the bottom of the sliding seat 61 rotates to provide a second gear rod 66 (see Figure 2, the second gear rod 66 and The axis of the first gear rod 63 is vertical) and the second gear rod 66 penetrates the bottom surface of the sliding seat 61. The second gear rod 66 is located on the outer wall of the tooth cavity 610 and is fixedly connected to the second bevel gear 67 and the second bevel gear 67 is connected to the first bevel gear. 65 mesh; the telescopic assembly 62 is located on the outer wall of the tooth cavity 610 (specifically, the outer wall of the first sliding sleeve) and is fixedly sleeved with the driven gear 68 and the driven gear 68 can mesh with the incomplete gear 64 (see Figure 3); the driven The outer rings of the gear 68 and the incomplete gear 64 are provided with a ring ring 69, and the outer wall of the ring ring 69 and the inner wall of the tooth cavity 610 are rotationally connected through ball bearings (specifically: the outer wall of the ring ring 69 is fixedly connected to the ball bearing and the outer wall of the ball bearing is embedded in the corresponding In the wall of the tooth cavity 610 (see Figures 2 and 3), the inner ring of the ring gear 69 meshes with the driven gear 68 and can mesh with the incomplete gear 64. The second gear rod 66 is located on the outer wall outside the sliding seat 61 to fix the sleeve cam 600, and the cams 600 on both sides of the upper mold 30 face opposite directions. Refer to Figure 6: the cam 600 on the left side of the upper mold 30 faces upward, and the cam 600 on the right side of the upper mold 30 faces upward. The cam 600 on the side faces downward.

A hydraulic lifting mechanism 11 is provided on the top of the portal bracket 10. In this embodiment, the hydraulic lifting mechanism 11 includes a hydraulic cylinder and a lifting rod. The hydraulic cylinder is fixedly installed on the top of the portal bracket 10 and the output end of the hydraulic cylinder is provided with a lifting rod; and the hydraulic lifting mechanism An electromagnet 12 is provided at the lower end of 11 (specifically, the end of the lifting rod away from the hydraulic rod) for controlling the upward and downward lifting of the upper mold 30 . A feed through hole 35 is provided in the upper mold 30 and is located in the outer ring of the first sliding cavity 32 and penetrates the upper mold 30 . The feed through hole 35 and the horizontal chute 33 are disposed in different positions (as shown in FIG. 5 , that is, the feed through hole 35 is disposed in the upper mold 30 ). There is no mutual interference between the hole 35 and the horizontal chute 33) for the introduction of the casting liquid; one or more feed through holes 35 can be provided, which can be set according to the actual casting requirements. At the same time, it is also necessary to The upper mold 30 is provided with an exhaust hole in the outer ring of the first sliding cavity 32 (the exhaust hole, the feed through hole 35 and the horizontal chute 33 are all out of position) to facilitate the discharge of gas in the casting cavity and avoid Create high pressure.

The telescopic connection mechanism 45 includes a second sliding sleeve, a second sliding rod and a second spring. The positioning plate 20 corresponds to the second sliding sleeve and uses the first sliding rod (here, after the upper mold 30 and the lower mold 40 are closed to form a casting cavity). The axis of the first slide rod is the center of the circle and an arc-shaped chute 23 is opened (see Figure 7). One end of the second sliding sleeve away from the lower mold 40 (by setting an arc-shaped slide block) is engaged with the corresponding arc-shaped chute 23. inside and slidingly connected; the end of the second sliding sleeve close to the lower mold 40 is coaxially provided with a second sliding rod and the second sliding rod is slidingly connected to the second sliding sleeve, and the end of the second sliding rod away from the lower mold 40 is connected to the second sliding rod through a second spring. The inner wall of the second sliding sleeve is connected, and the other end is fixedly connected to the corresponding side wall of the lower mold 40 (as shown in Figure 1).

The locking mechanism includes a positioning block 71 and a lightweight spring 72. The positioning block 71 is slidably disposed on the end surface around the boss of the lower mold 40 (that is, the bottom surface of the positioning block 71 is slidingly connected to the end surfaces around the boss of the lower mold 40) and the boss of the lower mold 40 A positioning groove 44 is provided on the side wall corresponding to the positioning block 71. The side of the positioning block 71 close to the boss of the lower mold 40 is internally connected to the positioning groove 44 through a lightweight spring 72 (see Figure 4); the upper end surface of the positioning block 71 is provided with a The middle part of the lower mold 40 has an inclined chute 710 that is inclined toward all sides. The bottom of the connecting slide rod 50 (specifically, the bottom of the lower thick rod section) is stuck in the corresponding inclined chute 710 and is slidably connected.

Example 2

As another preferred embodiment of the solution of the present invention, on the basis of the casting device described in Embodiment 1, in order to facilitate the demoulding of the molded shell blank or parts and thus facilitate the removal, a second second mold is provided inside the lower mold 40 A gravity block 420 is slidably provided in the sliding cavity 42 and the second sliding cavity 42. A plurality of "L" shaped ejector pins 430 are evenly arranged on the side walls of the gravity block 420 and around its axis. In this embodiment: "L" shaped ejector pins 430. The number is generally 3 to 6 (those skilled in the art can set it according to actual needs); an "L"-shaped chute 43 is provided inside the lower mold 40 corresponding to the "L"-shaped ejector pin 430, and the "L"-shaped ejector pin 430 is in The "L"-shaped chute 43 can slide inside and the width of the transverse groove of the "L"-shaped chute 43 is greater than the transverse rod diameter of the "L"-shaped ejector 430 (refer to Figure 4); The diameter of the vertical rod is larger than the diameter of its transverse rod, and the outer wall of the vertical rod is slidingly connected to the inner wall of the vertical groove of the "L"-shaped chute 43; the formed blank or part is pushed out of the concave cavity by sliding the "L"-shaped ejector rod 430. slot 41.

Example 3

As another preferred embodiment of the present invention, on the basis of the casting device described in Embodiment 2, a sealing ring is provided on the boss end surface of the lower mold 40 and located on the outer ring of the "L" shaped ejector 430, and the upper mold 30 is located on the boss end. The bottom surface of the outer ring of the mold 31 is provided with a sealing groove corresponding to the sealing ring. The sealing ring is stuck in the sealing groove to seal the casting cavity, thereby further preventing the splashing of the casting liquid during the casting process.

Example 4

As another preferred embodiment of the present invention, based on the casting device described in any one of Embodiments 1 to 3, a retractable feed pipe is provided on the top of the door-shaped bracket 10 and corresponding to the feed through hole 35; for example: The feed pipe adopts a bellows structure, or the feed pipe adopts a telescopic tube sleeve structure. The specific structure of the feed pipe can be set by those skilled in the art according to actual needs, and will not be discussed in detail in this embodiment.

Example 5

A gearbox housing casting method, using the casting device described in Embodiment 2 or Embodiment 3, includes the following steps:

Step 1. The initial state of the casting device is shown in Figure 8: that is, the upper mold 30 and the lower mold 40 are in contact with each other and the locking mechanism is self-locking; before casting begins, first start the hydraulic lifting mechanism 11 so that the lifting rod and the electromagnet 12 Move down until the bottom surface of the electromagnet 12 contacts the end surface of the upper mold 30, pausing the hydraulic lifting mechanism 11; then the electromagnet 12 is energized, and the electromagnet 12 is used to magnetically absorb the iron core block 320 to move upward; keep the electromagnet 12 energized, and then start the hydraulic pressure The lifting mechanism 11 causes the lifting rod and the electromagnet 12 to move upward, thereby driving the upper mold 30 and the shaking mechanism to move upward. The upper mold 30 moves upward by pulling the connecting slide rod 50 so that the positioning block 71 is separated from the positioning groove 44 and contacts the upper mold 30 and The locking between the lower molds 40 is shown in Figure 1; then, the punch 31 and the groove 41 are cleaned to avoid impurities in the casting cavity and affecting the shell casting;

Step 2: Start the hydraulic lifting mechanism 11 again, causing the lifting rod and the electromagnet 12 to move downward, thereby driving the upper mold 30 and the shaking mechanism to move downward. At this time, the connecting rod 330 slides on the outer wall of the thin rod section connecting the sliding rod 50. The connecting slide rod 50 does not move until the groove 41 and the punch 31 form a casting cavity and the bottom surface of the connecting rod 330 is supported by the lower thick rod section of the connecting slide rod 50; then, the electromagnet 12 is powered off and raised and lowered by hydraulic pressure. The mechanism 11 controls the electromagnet 12 to move upward to the initial position. The iron core block 320 loses its magnetic force and moves downward due to gravity. The connecting rod 50 is then pushed downward through the connecting rod 330 to realize that the positioning block 71 is stuck in the positioning groove 44. The lightweight spring 72 is compressed to complete the locking between the upper mold 30 and the lower mold 40 .

Step 3: Ventilate the casting liquid into the casting cavity through the feed through hole 35, and start the rotation of the first gear rod 63 at the same time. The first gear rod 63 drives the incomplete gear 64 (rotating counterclockwise as shown in Figure 3) and the first gear rod 64. A bevel gear 65 rotates: when the tooth segment of the incomplete gear 64 meshes with the driven gear 68, its smooth segment corresponds to the gear ring 69, and the incomplete gear 64 drives the driven gear 68 and the telescopic assembly 62 as shown in Figure 3. Rotate in the clockwise direction; when the tooth segment of the incomplete gear 64 meshes with the gear ring 69, its smooth segment corresponds to the driven gear 68, and the gear ring 69 drives the driven gear 68 and the telescopic assembly 62 to rotate counterclockwise as shown in Figure 3 , thereby realizing the cyclic reciprocating rotation of the upper mold 30 and driving the cyclic reciprocating deflection of the lower mold 40 (the deflection angle is small and is controlled by the tooth segments of the incomplete gear 64, as can be understood by those skilled in the art). The first bevel gear 65 drives the second gear rod 66 and the cam 600 to rotate through the second bevel gear 67. As shown in Figure 6: the cams 600 on the left and right sides of the upper mold 30 rotate in opposite directions. When the cam 600 on one side resists When the upper mold 30 is put on, the other side cam 600 rotates beyond the side away from the upper mold 30, thereby realizing the upper mold 30 to move slightly to the left and right as shown in Figure 1, and the upper mold 30 is used to drive the lower mold 40 to the left and right. Amplitude movement, through the compound jitter of left and right movement and forward and backward deflection, the casting liquid can be evenly and fully filled in the casting cavity.

Step 4: After the casting condensation is completed, start the rotation of the rotating shaft 21 to drive the positioning plate 20 to rotate around the central axis of the rotating shaft 21, thereby realizing that the upper mold 30 is located under the lower mold 40; at this time, due to the upper mold 30 and the iron core block 320 Its own weight and the elastic force of the light spring 72 separate the upper mold 30 from the lower mold 40; at the same time, the gravity of the gravity block 420 in the lower mold 40 drives the "L" shaped ejector 430 downward, thereby pushing the groove 41 The molded blank or part inside is pushed up to the upper mold 30 to complete the demoulding of the molded blank or part for easy subsequent removal.

Step 5: Start the rotation of the rotating shaft 21 again, so that the upper mold 30 is located on the upper side of the lower mold 40 again, and the entire device returns to the initial position; then the next shell casting is performed.

Claims (9)

1. A casting device for automobile gearbox housing, characterized in that it includes a door-shaped bracket (10), a positioning plate (20), an upper mold (30) and a lower mold (40). The positioning plate (20) is two blocks and they are respectively rotated and arranged on the opposite sides of both sides of the door-shaped bracket (10). Two positioning plates (20) are arranged in parallel; the upper mold (30) is arranged between the two positioning plates (20) and sequentially from top to bottom. With the lower mold (40), both sides of the upper mold (30) are connected to the corresponding positioning plates (20) through shaking mechanisms, and a punch (31) is provided in the middle of the lower end of the upper mold (30). The cross section of the lower mold (40) is The lower mold (40) has a "convex" shape structure, and both sides of the lower mold (40) are connected to the corresponding positioning plates (20) through telescopic connection mechanisms (45). A groove (41) is provided in the middle of the boss of the lower mold (40) corresponding to the punch (31). And the locking mechanism is evenly arranged on the outer ring of the boss, and the locking mechanism is connected with the upper mold (30) through the connecting slide rod (50). 2. A casting device for automobile gearbox housing according to claim 1, characterized in that: the positioning plates (20) are rotatably arranged on both sides of the portal bracket (10) through the rotating shaft (21) and The central axes of the two rotating shafts (21) are collinear. 3. A casting device for automobile gearbox housing according to claim 1 or 2, characterized in that: a first sliding cavity (32) is provided inside the upper mold (30) and the first sliding cavity (32) An iron core block (320) is slidably provided inside; a horizontal chute (33) is provided inside the upper mold (30) of the outer ring of the first slide cavity (32) corresponding to the locking mechanism, and the horizontal chute (33) is in contact with the first slide cavity. (32) is connected; the outer wall of the iron core block (320) is provided with a connecting rod (330) corresponding to the horizontal chute (33), and the connecting rod (330) is slidingly connected to the horizontal chute (33); the connecting slide rod (50) is connected from above The upper thick rod section, the thin rod section and the lower thick rod section are arranged in sequence from the bottom up. The diameter of the upper thick rod section is consistent with the diameter of the lower thick rod section and is larger than the thin rod section. The upper mold (30) is opened corresponding to the connecting sliding rod (50). The vertical hole (34) is connected to the corresponding horizontal chute (33), and the end of the connecting sliding rod (50) away from the locking mechanism penetrates the corresponding vertical hole (34) and is connected to the sliding rod (50). ) penetrates the corresponding connecting rod (330), and the connecting rod (330) has a sliding hole corresponding to the thin rod section connecting the sliding rod (50), and the diameter of the sliding hole is smaller than the diameter of the upper thick rod section. 4. A casting device for automobile gearbox housing according to claim 3, characterized in that: the shaking mechanism includes a sliding seat (61), a telescopic assembly (62), a first gear rod (63), Complete gear (64), first bevel gear (65), second gear rod (66), second bevel gear (67), driven gear (68) and ring gear (69); the sliding seat (61) is away from the upper One side of the mold (30) is slidingly connected to the corresponding positioning plate (20), and a tooth cavity (610) is provided in the sliding seat (61); the telescopic component (62) is rotated and installed in the tooth cavity (610), and the telescopic component (62) is rotatably installed in the tooth cavity (610). 62) is connected to the corresponding side wall of the upper mold (30); the tooth cavity (610) is located on the lower side of the telescopic assembly (62) and the first gear rod (63) is rotated and the outer wall of the first gear rod (63) is not completely connected in sequence. The gear (64) and the first bevel gear (65); the second gear rod (66) is rotated at the bottom of the sliding seat (61) and the second gear rod (66) penetrates the bottom surface of the sliding seat (61). The second gear rod (66) ) The outer wall of the tooth cavity (610) is fixedly connected to the second bevel gear (67) and the second bevel gear (67) meshes with the first bevel gear (65); the telescopic component (62) is located on the outer wall of the tooth cavity (610) The driven gear (68) is fixedly sleeved and can mesh with the incomplete gear (64); the outer rings of the driven gear (68) and the incomplete gear (64) are provided with a ring gear (69) and the teeth The outer wall of the ring (69) is rotationally connected to the inner wall of the tooth cavity (610), and the inner ring of the tooth ring (69) meshes with the driven gear (68) and can mesh with the incomplete gear (64). 5. A casting device for automobile gearbox housing according to claim 4, characterized in that: the telescopic assembly (62) includes a first sliding sleeve, a first sliding rod and a first spring, the first sliding sleeve One end is rotatably connected to the side wall of the tooth cavity (610), and the other end penetrates and is rotatably connected to the side wall of the corresponding sliding seat (61). The first sliding rod is coaxially disposed at one end of the first sliding sleeve close to the upper mold (30) and is connected with the first sliding sleeve. A sliding sleeve is slidingly connected, one end of the first sliding rod close to the upper mold (30) is fixedly connected to the side wall of the upper mold (30), and the other end is connected to the inner wall of the first sliding sleeve through a first spring. 6. A casting device for automobile gearbox housing according to claim 5, characterized in that the second gear rod (66) is located on the outer wall of the sliding seat (61) and is fixed to the sleeve cam (600). The cams (600) on both sides of the upper mold (30) face opposite directions. 7. A casting device for automobile gearbox casing according to claim 6, characterized in that: a hydraulic lifting mechanism (11) is provided at the top of the door-shaped bracket (10) and an electromagnetic device is provided at the lower end of the hydraulic lifting mechanism (11). Iron (12). 8. A casting device for automobile gearbox housing according to claim 7, characterized in that: the telescopic connection mechanism (45) includes a second sliding sleeve, a second sliding rod and a second spring, and a positioning plate ( 20) An arc-shaped chute (23) is opened corresponding to the second sliding sleeve and centered on the axis of the first sliding rod. The end of the second sliding sleeve away from the lower mold (40) is clamped in the corresponding arc-shaped chute (23) and Sliding connection; the end of the second sliding sleeve close to the lower mold (40) is coaxially provided with a second sliding rod and the second sliding rod is slidingly connected to the second sliding sleeve, and the end of the second sliding rod away from the lower mold (40) passes through the second sliding sleeve. The spring is connected to the inner wall of the second sliding sleeve, and the other end is fixedly connected to the corresponding side wall of the lower mold (40). 9. A casting device for automobile gearbox housing according to claim 8, characterized in that the locking mechanism includes a positioning block (71) and a lightweight spring (72), and the positioning block (71) is slidably arranged A positioning groove (44) is provided on the end surface around the boss of the lower mold (40) and the side wall of the boss of the lower mold (40) corresponding to the positioning block (71). The positioning block (71) is close to one side of the boss of the lower mold (40). The light spring (72) is internally connected to the positioning groove (44); the upper end surface of the positioning block (71) is provided with an inclined chute (710) that is inclined from the middle of the lower mold (40) to the surroundings, and is connected to the bottom clamp of the slide rod (50). In the corresponding inclined chute (710) and slidingly connected.