CN111237402A - Mechanical light high-speed marine gearbox - Google Patents

Abstract

The invention relates to a mechanical light high-speed marine gearbox, wherein a box body is internally provided with a clutch and an output shaft, a forward gear and a reverse gear are sleeved on the output shaft, the clutch comprises a guide sleeve in key connection with the output shaft, and a driving sleeve is fixed outside the guide sleeve; the two axial sides of the guide sleeve are respectively connected with a left bracket and a right bracket through snap springs, a left clutch component is arranged between the left bracket and the forward gear, and a right clutch component is arranged between the right bracket and the reverse gear; ball clamping cavities with slopes are arranged between the left bracket and the guide sleeve and between the right bracket and the guide sleeve, and steel balls are arranged in the ball clamping cavities; has the advantages that: the initial power is obtained in a half-clutch state to overcome the resistance of the steel ball to climb, the automatic pressurization of the clutch is realized, the gear shifting comfort is improved, and the return of the steel ball in the gear-releasing process is assisted by the restoring force of the clamp spring; adopt detachable fixed connection between driving sleeve and the guide pin bushing, the subsequent maintenance of being convenient for is adjusted, has realized the spacing of gear again simultaneously, and the reliability is higher.

Description

A mechanical light-duty high-speed marine gearbox

technical field

The invention belongs to the technical field of marine transmission devices, and in particular relates to a mechanical light-duty high-speed marine gearbox.

Background technique

The traditional marine gear box on the power system of small cruise ships and lifeboats adopts the means of sliding the sleeve to push the steel ball to form friction plate engagement to realize gear switching. This technology has the following defects: 1. The shifting action needs to overcome the steel ball Climbing resistance results in a large shifting torque, and a longer shift handle is required to reduce the shifting torque; 2. The impact load of shifting is large; 3. There is no backup stroke during the process of pressing the friction plate by the steel ball. During use, the gear box will slip after the row is connected, and the sliding sleeve cannot be self-locked, causing the shift lever to return by itself, or the gear box will follow the rotation seriously after the row is removed, and the friction plate cannot be loosened. Manual adjustment, but there are problems such as inconvenient adjustment.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, the purpose of the present invention is to provide a mechanical light-duty marine gear box with a light and crisp shifting action, a back-up stroke for friction plate engagement, and easy maintenance.

In order to achieve the above object, technical scheme of the present invention is as follows:

A mechanical light-duty high-speed marine gear box, comprising a box body, an input shaft part, an intermediate shaft part, an output shaft part and a shifting mechanism are arranged in the box body, and the output shaft part comprises a clutch and an output shaft rotatably connected with the box body, The empty sleeve on the output shaft is provided with a forward gear and a reverse gear, which are characterized by:

The clutch includes a guide sleeve keyed to the output shaft, a drive sleeve is fixed outside the guide sleeve, and the shifting mechanism is used to drive the drive sleeve to move axially; , Right bracket, a left clutch assembly is arranged between the left bracket and the forward gear, and a right clutch assembly is arranged between the right bracket and the reverse gear; There is a clamping ball cavity, the steel ball is arranged in the clamping ball cavity, and the side wall of the clamping ball cavity is provided with a slope which is convenient for the steel ball to enter and exit.

Further, the ball clamping cavity between the left bracket and the guide sleeve includes a left hemispherical groove opened on the guide sleeve and a left clamping groove opened on the left bracket, and the slope includes a left clamping groove. Left slope; the ball clamping cavity between the right bracket and the guide sleeve includes a right hemispherical groove opened on the guide sleeve and a right clamping groove opened on the right bracket, and the slope includes a right clamping groove arranged on the right clamping groove. Right slope.

Further, the input shaft component includes an input shaft that is rotatably connected to the box body, the input shaft is a double gear shaft including an input gear 1 and an input gear 2, the intermediate shaft component includes an intermediate shaft that is fixedly connected to the box body, and the middle An intermediate gear is sleeved on the shaft; the first input gear meshes with the forward gear, and the intermediate gear meshes with the second input gear and the reverse gear respectively.

Further, the left clutch assembly includes a left pressure plate connected with the spur gear key, a left butterfly spring is arranged between the left pressure plate and the spur gear, and the spur gear is fixed on the left pressure plate for limiting the left pressure plate. The left snap ring is located on the side of the left pressure plate close to the left bracket; the left inner friction plate and the left outer friction plate are alternately arranged between the left pressure plate and the left bracket, and the left inner friction plate and the left bracket are arranged alternately. The front gear is connected with the key, and the left outer friction plate is connected with the left bracket key.

Further, the right clutch assembly includes a right pressure plate connected with the reverse gear key, a right butterfly spring is arranged between the right pressure plate and the reverse gear, and a right snap ring for limiting the right pressure plate is fixed on the reverse gear. , the right snap ring is located on the side of the right pressure plate close to the right bracket; the right inner friction plate and the right outer friction plate are arranged alternately between the right pressure plate and the right bracket, and the right inner friction plate and the reverse gear key are arranged alternately. Connect, the right outer friction plate is connected with the right bracket key.

Further, the drive sleeve key is connected to the guide sleeve, the guide sleeve is provided with several positioning grooves, the positioning grooves are provided with limit pins, and the positioning springs are arranged between the limit pins and the bottom surface of the positioning grooves. The drive sleeve is provided with a limit slot, and one end of the limit pin protrudes from the positioning slot and is clamped into the limit slot.

The advantage of the invention is that the initial power is obtained in the semi-clutch state to overcome the resistance of the steel ball to climb the slope, realize the automatic pressurization of the clutch, improve the comfort of shifting, and assist the release through the restoring force of the circlip. The return of the steel ball during the shift process; the detachable fixed connection between the drive sleeve and the guide sleeve is convenient for subsequent maintenance and adjustment, and at the same time, the limit of the gear is realized, and the reliability is high.

Description of drawings

1 is a schematic cross-sectional view of the present invention in an embodiment;

2 is a schematic cross-sectional view of the present invention from another perspective in an embodiment;

Fig. 3 is the structural schematic diagram of the clamping ball cavity between the guide sleeve and the right bracket in the embodiment;

4 is a schematic diagram of the positional arrangement of the clamping ball cavity between the guide sleeve and the left and right brackets in the embodiment;

5 is a schematic diagram of the structure of the right slot on the right bracket in the embodiment;

Fig. 6 is the B-B sectional schematic diagram in Fig. 5;

Label description

Input shaft 1, box body 2, output shaft 3, left butterfly spring 4, left snap ring 5, left pressure plate 6, spur gear 7, left inner friction plate 8, left outer friction plate 9, left bracket 10, Circlip 11, drive sleeve 12, limit pin 13, positioning spring 14, right bracket 15, right outer friction plate 16, right inner friction plate 17, right pressure plate 18, right snap ring 19, right butterfly spring 20, Reverse gear 21, steel ball 22, guide sleeve 23, intermediate shaft 24, intermediate gear 25, shift fork 26, shift shaft 27, shift arm 28, card ball cavity 29, right slope 30, input gear one 31, input gear Two 32, the right hemisphere slot 33, the right card slot 34.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments.

This embodiment proposes a mechanical light-duty high-speed marine gearbox, as shown in Figures 1 and 2, including a box body 2, which is provided with an input shaft part, an intermediate shaft part, an output shaft part and a gear shift mechanism.

The input shaft component includes an input shaft 1 rotatably connected with the box body 2, and the input shaft 1 is a double gear shaft including an input gear 1 31 and an input gear 2 32; the intermediate shaft component includes an intermediate shaft 24 that is fixedly connected to the box body 2. , there is an intermediate gear 25 on the intermediate shaft 24.

The components of the output shaft 3 include a clutch and an output shaft 3 rotatably connected with the box body 2. The output shaft 3 is provided with a forward gear 7 and a reverse gear 21, the input gear 1 31 meshes with the forward gear 7, and the intermediate gear 25 is respectively connected with the input The second gear 32 and the reverse gear 21 mesh. Among them, the clutch includes a guide sleeve 23 connected with the output shaft 3 keys, and the drive sleeve 12 is fixed outside the guide sleeve 23. The shift mechanism includes a shift arm 28, a shift shaft 27 and a shift fork 26. By rotating the shift arm 28 can realize the axial movement of the shift fork 26 , and the axial movement of the shift fork 26 drives the axial movement of the drive sleeve 12 .

The fixation between the guide sleeve 23 and the drive sleeve 12 is realized by the following methods: the drive sleeve 12 is keyed on the guide sleeve 23, a number of positioning grooves are opened on the outer wall of the guide sleeve 23, and the positioning grooves are provided with limit pins 13, limit A positioning spring 14 is provided between the positioning pin 13 and the bottom surface of the positioning groove, and a limiting groove is provided on the driving sleeve 12 . The key connection between the drive sleeve 12 and the guide sleeve 23 limits the radial movement between the drive sleeve 12 and the guide sleeve 23 , while the limit pin 13 and the positioning spring 14 limit the distance between the drive sleeve 12 and the guide sleeve 23 . Axial movement, thereby realizing the fixed connection between the drive sleeve 12 and the guide sleeve 23, and the fixed connection is detachable, which is convenient for subsequent disassembly and maintenance.

The two axial sides of the guide sleeve 23 are respectively connected with the left and right brackets 15 through the circlips 11. A left clutch assembly is provided between the left bracket 10 and the spur gear 7, and the left clutch assembly includes a key connection with the spur gear 7. There is a left disc spring 4 between the left pressure plate 6 and the spur gear 7, and a left snap ring 5 for limiting the left pressure disk 6 is fixed on the spur gear 7, and the left snap ring 5 The left pressure plate 6 is located on the side of the left bracket 10; the left inner friction plate 8 and the left outer friction plate 9 are arranged alternately between the left pressure plate 6 and the left bracket 10. The spur gear is connected by 7 keys, and the left outer friction plate 9 is connected with the left bracket 10 by keys. A right clutch assembly is provided between the right bracket 15 and the reverse gear 21, the right clutch assembly includes a right pressure plate 18 keyed to the reverse gear 21, and a right butterfly spring 20 is arranged between the right pressure plate 18 and the reverse gear 21, A right snap ring 19 for limiting the right pressure plate 18 is fixed on the reverse gear 21, and the right snap ring 19 is located on the side of the right pressure plate 18 close to the right bracket 15; the right pressure plate 18 and the right bracket 15 are connected. The right inner friction plate 17 and the right outer friction plate 16 are arranged alternately. The right inner friction plate 17 is keyed to the reverse gear 21 , and the right outer friction plate 16 is keyed to the right bracket 15 .

As shown in FIGS. 3 to 6 , a ball clamping cavity 29 is provided between the left and right brackets 15 and the guide sleeve 23 . The left hemispherical slot on 23 and the left card slot opened on the left bracket 10, the left clip slot is provided with a left slope, and the setting direction of the left slope is opposite to the rotation direction of the left bracket 10 when the gear moves; The ball clamping cavity 29 between the right bracket 15 and the guide sleeve 23 includes a right hemispherical groove 33 opened on the guide sleeve 23 and a right clamping groove 34 opened on the right bracket 15. The right clamping groove 34 is provided with a right slope. 30. The setting direction of the right slope 30 is opposite to the rotation direction of the right bracket 15 during the reverse gear operation.

When performing a forward motion, the shifting fork 26 drives the drive sleeve 12 to move to the side of the spur gear 7 , and due to the fixed connection between the drive sleeve 12 and the guide sleeve 23 , the drive sleeve 12 drives the guide sleeve 23 to the side of the spur gear 7 . move, thereby driving the left bracket 10 to move to the side of the spur gear 7, and the left inner and outer friction plates 8 and 9 begin to stick closely. In the clutch state, at this time, the rotation of the spur gear 7 can drive the left bracket 10 to rotate. Since the left bracket 10 and the guide sleeve 23 are connected by the circlip 11, there will be a certain occurrence between the left bracket 10 and the guide sleeve 23. The relative rotation of the angle, in the process of relative rotation, the steel ball 22 in the left card slot climbs out of the left card slot along the left slope, at this time, the steel ball 22 pushes the left bracket 10 and the guide sleeve 23 away and pushes the left The bracket 10 moves to the left and presses the left inner and outer friction plates 8 and 9 to realize the complete connection between the spur gear 7 and the output shaft 3; The pin 13 and the positioning spring 14 limit the position, thereby realizing the limit of the gear position.

When the shifting action is performed, the drive sleeve 12 drives the left bracket 10 to move the center of the guide sleeve 23 under the action of the shifting mechanism. The bracket 10 will be rotated and reset. During the process of rotation and reset of the left bracket 10, the booster steel ball 22 returns to the left slot along the right slope 30 to complete the disengagement action.

The reverse gear shifting action is the same as the above, and will not be repeated here.

The above embodiments are only used to illustrate the concept of the present invention, but not to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention by using this concept should fall within the protection scope of the present invention.

Claims (6)

1. The utility model provides a light-duty high-speed marine gear box of mechanical type, includes the box, is equipped with input shaft part, intermediate shaft part, output shaft part and gearshift in the box, and output shaft part includes clutch and the output shaft of being connected with the box rotation, and the empty cover of output shaft has driving gear and reverse gear, its characterized in that:

the clutch comprises a guide sleeve in key connection with the output shaft, a driving sleeve is fixed outside the guide sleeve, and the gear shifting mechanism is used for driving the driving sleeve to axially move; the two axial sides of the guide sleeve are respectively connected with a left bracket and a right bracket through snap springs, a left clutch component is arranged between the left bracket and the forward gear, and a right clutch component is arranged between the right bracket and the reverse gear; all be equipped with the card ball chamber between left and right bracket and the guide pin bushing, be equipped with the steel ball in the card ball chamber, be equipped with the slope of the business turn over of steel ball of being convenient for on the lateral wall in card ball chamber.

2. A mechanical light high speed marine gearbox according to claim 1 wherein: the ball clamping cavity between the left bracket and the guide sleeve comprises a left hemispherical groove formed in the guide sleeve and a left clamping groove formed in the left bracket, and the slope comprises a left slope arranged on the left clamping groove; the ball clamping cavity between the right bracket and the guide sleeve comprises a right hemispherical groove arranged on the guide sleeve and a right clamping groove arranged on the right bracket, and the slope comprises a right slope arranged on the right clamping groove.

3. A mechanical light high speed marine gearbox according to claim 1 wherein: the input shaft part comprises an input shaft which is rotationally connected with the box body, the input shaft is a double-gear shaft comprising a first input gear and a second input gear, the intermediate shaft part comprises an intermediate shaft which is fixedly connected with the box body, and an intermediate gear is sleeved on the intermediate shaft in an empty mode; the input gear I is meshed with the forward gear, and the intermediate gear is respectively meshed with the input gear II and the reverse gear.

4. A mechanical light high speed marine gearbox according to claim 1 wherein: the left clutch assembly comprises a left pressure plate connected with the driving gear in a key mode, a left belleville spring is arranged between the left pressure plate and the driving gear, a left clamping ring used for limiting the left pressure plate is fixedly connected to the driving gear, and the left clamping ring is located on one side, close to the left bracket, of the left pressure plate; and a left inner friction plate and a left outer friction plate which are alternately arranged are arranged between the left pressure plate and the left bracket, the left inner friction plate is in key connection with a driving gear, and the left outer friction plate is in key connection with the left bracket.

5. A mechanical light high speed marine gearbox according to claim 1 wherein: the right clutch assembly comprises a right pressure plate connected with the reversing gear key, a right belleville spring is arranged between the right pressure plate and the reversing gear, a right clamping ring for limiting the right pressure plate is fixedly connected to the reversing gear, and the right clamping ring is positioned on one side, close to the right bracket, of the right pressure plate; and a right inner friction plate and a right outer friction plate which are alternately arranged are arranged between the right pressure plate and the right bracket, the right inner friction plate is in key connection with a reversing gear, and the right outer friction plate is in key connection with the right bracket.

6. A mechanical light high speed marine gearbox according to claim 1 wherein: the drive sleeve is in keyed connection with the guide sleeve, a plurality of positioning grooves are formed in the guide sleeve, limiting pins are arranged in the positioning grooves, positioning springs are arranged between the limiting pins and the bottom surfaces of the positioning grooves, limiting grooves are formed in the drive sleeve, and one ends of the limiting pins extend out of the positioning grooves and are clamped into the limiting grooves.

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