CN102000996B - Positioning device - Google Patents

Abstract

The invention provides a positioning device, which comprises a base part (3) and a positioning part (1) arranged on the base part (3); the base part (3) comprises a rotating shaft (33), the rotating shaft (33) is horizontally arranged on the base part (3), and the positioning part (1) is rotatably arranged around the rotating shaft (33). When the positioning device is used for positioning the suspension arm frame, the inclination angle of the positioning part can be automatically adjusted according to the inclination angle of the suspension arm frame, so that the positioning part and the suspension arm frame have larger contact area, and a more stable positioning structure is formed for the suspension arm frame.

Description

Positioning means

technical field

The invention relates to the field of machining positioning, and more specifically, to a positioning device.

Background technique

Crawler crane is a new type of crane product introduced in China in recent years. It is widely used, has great market demand and high product added value. But the current domestic manufacturing process is still very rough, there is a lot of room for improvement and development.

The crawler crane jib is generally a tubular truss arm structure, with many holes on the top and bottom jibs, high machining accuracy, and high coaxiality requirements. Therefore, it is necessary to carry out integral metal processing on CNC double-sided boring or pentahedron. The chords of the crawler crane jib are all made of seamless steel pipes, most of which are variable cross-sections. It is not easy to position and clamp during the overall metal processing, and the workpiece shakes seriously, so that the double-sided boring equipment cannot perform double-sided boring and simultaneously process both sides. However, it can only be processed on one side, and the selected spindle speed is low and the amount of feed is small. Otherwise, the workpiece will vibrate seriously and the tool will be damaged, resulting in low metal processing efficiency and processing quality.

The known structure for metal processing and positioning of the boom frame is to support the boom frame to be processed with a screw rod, and the lower ends of each chord of the boom frame are positioned with a screw rod, which is a point contact. This kind of screw rod positioning can only Positioning the height direction, but there is no limit to the vibration of the jib chord in the lateral direction. Therefore, when the jib is processed from one side, the jib will still have a large vibration. For the jib The processing of the machine has brought great inconvenience, and the shaking of the boom frame will cause accelerated damage to the processing tools, which increases the cost and cannot guarantee the processing accuracy.

In addition, the structure of the boom frame is generally large and the chord is long. When it is placed, there will be a certain inclination angle, which will affect the contact area between the positioning part and the boom frame when the positioning device positions the boom frame . In general, the positioning part of the positioning device is a horizontal structure, which cannot adapt to the inclination angle of the boom frame, which will inevitably lead to point contact between the boom frame and the positioning device, which will affect the positioning stability of the positioning device for the boom frame , It will also cause abnormal wear and tear of the positioning device, which reduces the service life of the positioning device and increases the cost.

Contents of the invention

The present invention aims to provide a positioning device, which can automatically adjust the inclination angle of the positioning part according to the inclination angle of the object to be processed when positioning the object to be processed, so that the positioning part and the object to be processed have a larger contact area, thereby The processed object forms a more stable positioning structure.

The positioning device according to the present invention includes a base part and a positioning part arranged on the base part; the base part includes a rotating shaft, the rotating shaft is horizontally arranged on the base part, and the positioning part is rotatably arranged around the rotating shaft.

Further, the positioning device also includes a movable part, which controls the lifting of the positioning part, the upper end is connected with the positioning part, and the lower end is arranged on the rotating shaft of the base part.

Further, the movable part includes: a rotating connecting piece arranged at the lower end of the moving part, and the rotating connecting piece has a shaft hole for installing a rotating shaft; a lifting mechanism arranged on the rotating connecting piece, and the upper end of the lifting mechanism has a mounting structure for installing the positioning part.

Further, the positioning part is rotatably arranged with the centerline of the installation structure as the axis.

Further, the lifting mechanism includes a screw rod and a screw sleeve matched with the screw rod, and one of the screw rod and the screw sleeve is non-rotatably arranged on the rotary connecting member.

Further, the installation structure at the upper end of the lifting part of the lifting mechanism is an installation hole, and the lower end of the positioning part has an installation boss, and the installation boss is placed in the installation hole.

Further, the peripheral wall of the mounting boss is provided with a peripheral groove, and at least one positioning pin is provided at a position corresponding to the peripheral groove on the peripheral wall of the lifting part, and the positioning pin extends into the peripheral groove along the radial direction.

Further, the base part also includes a base and a rotating shaft bracket arranged on the base, an elastic gasket is arranged between the movable part and the rotating shaft bracket, the rotating shaft includes three stepped sections, and the length of the middle stepped section is less than two of the rotating shaft bracket. The distance between the outer faces.

Further, at least one pair of handles are provided on the outer wall of the screw sleeve.

Further, the positioning part includes a V-shaped positioning block.

According to the positioning device of the present invention, the positioning part is rotatably arranged on the base part, so that the positioning device can automatically adjust the inclination angle of the positioning part according to the inclination angle of the boom frame when positioning the boom frame, so that the positioning part It has a larger contact area with the boom frame, thus forming a more stable positioning structure for the boom frame. The positioning part can be rotated, so that the alignment of the positioning part is more convenient, and the adjustment of the whole device is also faster and more convenient. The setting of the movable part makes the height of the positioning device adjustable, which can meet more different needs.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 shows a front view sectional structural schematic diagram of a first embodiment of a positioning device according to the present invention;

Fig. 2 shows a left view structural schematic diagram of the first embodiment of the positioning device according to the present invention;

Fig. 3 shows the A-A sectional structure diagram of the first embodiment of the positioning device according to the present invention; and

Fig. 4 shows a structural view of the positioning device in working state according to the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, the embodiment of the positioning device according to the present invention includes a base part 3, which has a structure supported on the working surface, and a positioning part 1, which is arranged on the base part 3, It has a structure for clamping the object to be processed; the base part 3 includes a rotating shaft 33 , the rotating shaft 33 is horizontally arranged on the base part 3 , and the positioning part 1 is rotatably arranged on the rotating shaft 33 . The base part 3 also includes: a base 31, which is stably arranged on the working surface of the positioning device; a rotating shaft bracket 32, which includes two oppositely arranged support plates fixed on the base 31, and the support plates are vertically arranged on the base 31, Each support plate is provided with a rotating shaft hole, and rotating shaft 33 is arranged on the rotating shaft hole, and both ends of rotating shaft 33 have stoppers, so that rotating shaft 33 can rotate freely in the rotating shaft hole, but can not move laterally, so as to avoid rotating shaft 33 One section breaks away from the shaft hole, causing the positioning part 1 to deflect, or detached from the shaft 33, resulting in failure or even damage to the positioning device.

As shown in Fig. 1, in this embodiment, the rotating shaft 33 is a rotating shaft comprising three stepped sections, with a first stepped section whose diameter is smaller than that of the second stepped section, a second stepped section arranged in the shaft hole and a second stepped section arranged in the The third stepped section at the outermost end of the second stepped section is larger than the diameter of the rotating shaft hole, and the third stepped section is blocked outside the rotating shaft hole, effectively playing a stop function. An external thread structure is provided on the first step section for installing a locking nut, and an elastic washer is provided between the locking nut and the rotating shaft support 32 , and the outer diameter of the elastic washer is larger than the diameter of the rotating shaft hole. Under the joint action of the tightening nut and the third step section, the rotating shaft 33 is rotatably fixed on the rotating shaft bracket 32 . Preferably, the length of the second stepped section is slightly smaller than the distance between the outer end surfaces of the two support plates.

A movable part 2 is also arranged between the base part 3 and the positioning part 1 , the movable part 2 controls the lifting of the positioning part 1 , the upper end is connected with the positioning part 1 , and the lower end is arranged on the rotating shaft 33 of the base part 3 . Movable part 2 comprises the rotating connecting piece 21 that is arranged on the lower end of moving part 2, and the rotating shaft hole that installs rotating shaft 33 is arranged on the rotating connecting piece 21; installation structure. The positioning part 1 is rotatably arranged with the centerline of the installation structure as the axis. The rotating connecting member 21 has a shaft hole with the same diameter as the shaft of the second step section of the shaft 33 , and is arranged on the shaft 33 through the shaft hole. The rotating connecting member 21 is suspended on the rotating shaft 33, and there is a gap or distance between the bottom and the base 31, which can be a variety of different mechanisms. As shown in Figure 1, in the present embodiment, the rotating connector 21 is a cube structure with a rectangular cross section, and the plane structure at its upper end is provided with a mounting hole for the lifting mechanism 22 to be installed, and the lower end of the lifting mechanism 22 can be installed. It is a cylindrical structure, it can also be a cubic structure, or a structure of other shapes, and the mounting hole of the rotating connector 21 is adapted to it; the mounting part of the lifting mechanism 22 is welded on the mounting hole of the rotating connector 21, or it can be slidably set On the mounting hole of the rotating connector 21. Since the lifting mechanism 22 and the rotating connecting piece 21 are two parts, the processing is more convenient and the processing efficiency can be improved. When one of the lifting mechanism 22 and the rotating link 21 is damaged, only the damaged part can be replaced, and the intact part can still be used continuously, which reduces the production cost.

The lifting mechanism 22 includes a screw rod 221 and a screw sleeve 222 matched with the screw rod 221 , one of the screw rod 221 and the screw sleeve 222 is non-rotatably arranged on the rotating plate 21 . As shown in Figures 1 and 3, the lifting mechanism 22 in this embodiment includes a screw rod 221 and a screw sleeve 222 sleeved on the outside of the screw rod 221, the screw rod 221 and the screw sleeve 222 have a matching thread structure, and the screw rod 221 is non-rotatable ground on the rotating connector 21. A handle 225 is disposed on the outer wall of the screw sleeve 222 , preferably the handle is disposed symmetrically, for controlling the lifting of the lifting mechanism 22 . In this embodiment, two pairs of handles 225 are provided, and each pair of handles 225 is arranged perpendicular to the other pair of handles 225, and they are symmetrically distributed on the outer wall of the screw sleeve 222. For the lifting of the cooperation between the screw rod and the screw sleeve, therefore, the lifting function of the lifting mechanism needs to be realized through the relative movement between the screw rod 221 and the screw sleeve 222 . Because the screw rod 221 is non-rotatably arranged on the rotary connector 21, therefore, when the handle 225 on the outside of the screw sleeve 222 is rotated, the screw sleeve 222 rotates together with the handle 225, and the screw rod 221 is restricted and cannot rotate, and the screw rod 221 and the screw sleeve 222 Relative movement occurs, and the screw sleeve 222 moves upwards under the action of the helical structure, so that the positioning part 1 disposed thereon moves upwards and presses against the object to be processed. When it needs to be lowered, the handle 225 is reversed, and under the effect of the helical structure, the screw sleeve 222 moves downward, thereby driving the positioning part 1 to move downward together. In addition, the handle 225 can also serve as a transport positioning device.

As shown in FIG. 1 and FIG. 3 , the positioning part 1 includes a V-shaped positioning block 11 , and the V-shaped positioning block 11 is a cuboid structure with a V-shaped groove. The V-shaped groove of the V-shaped positioning block 11 has good adaptability to circular objects, and therefore has a good positioning effect on circular objects. Since the V-shaped positioning block 11 can rotate around the rotating shaft 33, it can meet the change of the cross-sectional angle of the boom of different objects to be positioned, so that the V-shaped positioning block 11 fits very well with the boom chord, and the contact surface increases. , the positioning is more stable. In an embodiment not shown, the positioning part 1 is a U-shaped block, which is arranged on the installation hole 223 , and clamping bolts with adjustable clamping distance are arranged in the two side walls of the U-shaped block. A clamping block can also be installed at the end of the clamping bolt, and the clamping of the boom frame for the object to be processed can be adjusted by adjusting the protruding length of the clamping bolt. The positioning part 1 of the U-shaped block structure can realize the positioning and clamping of boom frames of various shapes, has wider adaptability, and can meet various needs. There is a protruding structure installed on the screw sleeve 222 at the bottom of the above-mentioned type block, so that the type block can be arranged on the screw sleeve 222 and move up and down together with the screw sleeve 222 .

The upper end of the lifting part of the lifting mechanism 22 has a mounting hole 223 for installing the positioning part 1 , and the lower end of the positioning part 1 has a mounting boss 12 , and the mounting boss 12 is placed in the mounting hole 223 . The lifting part can be a screw rod 221 or a screw sleeve 222. In practice, it depends on which part the lifting movement is, and the mounting hole 223 is arranged on this part. In this embodiment, the mounting boss 12 is welded together with the V-shaped positioning block 11, and a circumferential groove 121 is provided on the peripheral wall of the mounting boss 12, and the positioning pin 224 extends into the peripheral wall through the outer wall of the screw sleeve 222. into the slot 121, therefore, the positioning pin 224 only restricts the installation boss 12 in the up and down direction, but does not restrict the installation boss 12 in the rotation direction, therefore, the installation boss 12 can still be rotated 360 degrees. rotation, thus ensuring that the mounting boss 12 is stably arranged on the screw sleeve 222 and will not come out, and the circumferential rotation of the mounting boss 12 is ensured, so that the V-shaped positioning block 11 has flexible rotatability, thereby The whole device has better adjustment performance and alignment function. Preferably, the positioning pins 224 are symmetrically disposed on the sidewall of the screw sleeve 222 .

The lifting mechanism can also be other devices with lifting functions, such as air cylinders, hydraulic oil cylinders and the like. In an unshown embodiment, the lifting mechanism 22 is a hydraulic cylinder, including a hydraulic cylinder body and a piston rod. The hydraulic cylinder body is arranged on the rotating connector 21 , and the piston rod is fixedly connected to the positioning part 1 . The lifting of the positioning part 1 is controlled by controlling the lifting of the piston rod of the hydraulic cylinder. The lower end of the hydraulic oil cylinder has a mounting structure, is installed on the rotating connector 21, and swings with the swing of the rotating connector 21. The piston rod itself has the function of rotation, therefore, the positioning part 1 fixed on it also has the function of rotation.

The base 31 and the rotating shaft support 32 are connected by bolts, and the height of the rotating shaft support 32 is adjusted by the bolts. As shown in Figure 3, since the bottom of the rotating connecting member 21 is a planar structure, when the rotating connecting member 21 is rotated by an angle of θ, one end of the bottom will touch the base 31, thereby forming a resistance to the rotation of the rotating connecting member 21, so that It can no longer rotate, and the size of θ depends on the distance between the bottom surface of the rotating connector 21 and the base 31. When θ is too small, it will inevitably affect the use effect of the device, making it unable to meet the inclination angle of the boom frame of the object to be processed. Big support requirements. Therefore, this needs to be improved. When the rotating shaft bracket 32 is fixedly arranged on the base 31 by the adjusting bolt, the distance between the rotating shaft bracket 32 and the base 31 can be changed by adjusting the adjusting bolt, and the distance between the bottom surface of the rotating connecting piece 21 and the base 31 can be increased, so as to make the rotating connection The angle adjustable range of the part 21 is increased, and the application range of the device is expanded. In addition, the shaft bracket 32 can also be an L-shaped bent part, and the bent part and the base 31 are connected by bolts, and the bolts are height-adjustable bolts, and the height of the shaft bracket 32 on the base 31 can be adjusted by adjusting the bolts. , so as to adjust the distance between the bottom surface of the rotating connector 21 and the base 31 to meet the needs of different situations, and at the same time have better stability and safety performance.

Preferably, an elastic washer 34 is provided between the movable part 2 and the rotating shaft bracket 32 . After the rotating connector 21 is installed on the rotating shaft 33, because the distance between the two rotating shaft brackets 32 is constant and cannot be adjusted, there may be a gap between the rotating connecting member 21 and the rotating shaft bracket 32, and the rotating connecting member 21 Will move laterally on the rotating shaft 33 along the gap, which will affect the stability of the entire positioning device, and will accelerate the wear between the shaft hole of the rotating connector 21 and the rotating shaft 33, reducing the service life of the positioning device. Therefore, an elastic washer 34 is arranged between the rotating connector 21 and the rotating shaft bracket 32. Under the elasticity of the elastic washer 34, the positioning effect between the rotating connecting member 21 and the rotating shaft bracket 32 can be strengthened to prevent the rotating connecting member from The lateral movement of 21 on the rotating shaft 33 enhances the stability in use.

As shown in Figure 4, when using the positioning device of the present invention for positioning, first put the object to be processed down, hang the boom on the double-sided boring or pentahedral workbench, and after adjusting the line, place the workpiece in a conventional manner Compression, place the first pair of positioning devices on the bottom of the object to be processed along the length direction of the boom frame, so that the direction in which the positioning part 1 rotates around the rotating shaft 33 is the same as the length direction of the boom frame, and adjust the movable part 2. Make the positioning device push against the object to be processed, and clamp the boom frame of the object to be processed, and complete the automatic alignment of the clamping position through the rotation of the positioning part 1 and the rotation of the movable part 2 around the rotating shaft 33.

Place the second pair of positioning devices under another reserve processing place of the object to be processed, and use the first pair of installed positioning devices as a reference to adjust the second pair of positioning devices so that the positioning part is along the direction of the object to be processed. The inclination angle in the direction of the boom frame is the same as the inclination angle of the positioning part of the first pair of positioning devices. Adjust the height of the movable part so that the second pair of positioning The positioning of the boom frame of the object to be processed is being completed; the above steps are repeated until all the positions to be processed on the object to be processed are fixed. When the height of the positioning device is insufficient, a contour auxiliary device can be set on the supporting work surface, and the positioning device can be arranged on the contour auxiliary device.

From the above description, it can be seen that according to the positioning device of the present invention, when the boom frame is positioned, the inclination angle of the positioning part 1 can be automatically adjusted according to the inclination angle of the boom frame, so that the positioning part 1 and the boom The frame has a larger contact area, thereby forming a more stable positioning structure for the boom frame. The positioning device of the present invention has the advantages of simple structure, beautiful and harmonious appearance, low manufacturing cost, convenient use and operation, and can also be widely used in scribing and repairing of arm frames, and metal processing of similar truss arms.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A positioning device for machining positioning, comprising a base portion (3), and a positioning portion (1) arranged on the base portion (3), the base portion (3) comprising a horizontal A rotating shaft (33) is provided, the positioning part (1) is rotatably arranged around the rotating shaft (33), it is characterized in that, The positioning device also includes a movable part (2), the movable part (2) controls the lifting of the positioning part (1), the upper end is connected with the positioning part (1), and the lower end is arranged on the base part ( 3) on the rotating shaft (33). 2. The positioning device according to claim 1, characterized in that, the movable part (2) comprises: a rotating connector (21) arranged at the lower end of the movable part (2), the rotating connector (21) having a rotating shaft hole for installing the rotating shaft (33); The elevating mechanism (22) arranged on the rotating connector (21), the upper end of the elevating mechanism (22) has an installation structure for installing the positioning part (1). 3. The positioning device according to claim 2, characterized in that, the positioning part (1) is rotatably arranged around the centerline of the installation structure as an axis. 4. The positioning device according to claim 2, characterized in that, the lifting mechanism (22) comprises a screw (221) and a screw sleeve (222) matched with the screw (221), and the screw (221 ) and one of the threaded sleeve (222) is non-rotatably arranged on the rotating connector (21). 5. The positioning device according to claim 4, characterized in that, The installation structure at the upper end of the lifting part of the lifting mechanism (22) is an installation hole (223), and the lower end of the positioning part (1) has an installation boss (12), and the installation boss (12) is placed on Inside the installation hole (223). 6. The positioning device according to claim 5, characterized in that, the peripheral wall of the mounting boss (12) is provided with a circumferential groove (121), and the peripheral wall of the lifting part corresponds to the circumferential groove (121). 121) is provided with at least one positioning pin (224), and the positioning pin (224) extends into the circumferential groove (121) in the radial direction. 7. The positioning device according to claim 1, characterized in that, the base part (3) further comprises a base (31) and a rotating shaft bracket (32) arranged on the base (31), the movable An elastic gasket (34) is arranged between the part (2) and the shaft bracket (32); the shaft (33) includes three stepped sections, and the length of the middle step section is shorter than that of the shaft bracket (32) The distance between the two outer faces. 8. The positioning device according to claim 1, characterized in that at least one handle (225) is provided on the outer wall of the lifting part of the movable part (2). 9. The positioning device according to any one of claims 1-8, characterized in that the positioning portion comprises a V-shaped positioning block (11).

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