CN220727090U - External gear shifting fork device - Google Patents
External gear shifting fork device Download PDFInfo
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- CN220727090U CN220727090U CN202320373212.9U CN202320373212U CN220727090U CN 220727090 U CN220727090 U CN 220727090U CN 202320373212 U CN202320373212 U CN 202320373212U CN 220727090 U CN220727090 U CN 220727090U
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- shifting fork
- gear
- handle
- box body
- shifting
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- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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- Gear-Shifting Mechanisms (AREA)
Abstract
The utility model relates to an external gear shifting fork device which comprises a box body, wherein an input shaft is arranged at the upper part of the box body, a first gear, a clutch, a shifting fork and a second gear are respectively arranged on the input shaft from left to right, one end of the shifting fork is clamped and installed on the side surface of the clutch, and a shifting fork sliding shaft is arranged at the other end of the shifting fork; the two ends of the shifting fork sliding shaft are arranged on the box body; a shifting fork block is arranged on one side of the shifting fork far away from the gear by utilizing a shifting fork sliding block, a shifting fork pin shaft is arranged at the lower part of the shifting fork block, and the shifting fork pin shaft penetrates through the box body to be arranged; the end of the shifting fork pin shaft outside the box body is connected with a handle. According to the utility model, the moving path of the shifting fork sliding block in the shifting fork slot hole can be changed into an angle similar to the moving path of the handle, so that the types of parts of the gear shifting device and the required installation space are simplified. And the limit device is adopted to prevent reasonable shaking in the running process of the gear box, and prevent the gear engaged in transmission from being separated from the clutch, so that the gear box is prevented from being out of gear.
Description
Technical Field
The utility model belongs to the technical field of gearboxes, and particularly relates to an external gear shifting fork device.
Background
In the meshing transmission process of the gear box, different transmission ratios sometimes need to be switched, and therefore, a shifting fork and a clutch are combined, and the clutch is driven to move by using a movable shifting fork, so that transmission with different transmission ratios is realized after gears with different moduli and gear numbers are meshed. In the shifting fork moving process, a large space is generally occupied, and the utilization of the gear space is affected. Therefore, it is necessary to modify in a suitable way in order to obtain a better transmission effect of the gear fork.
Disclosure of Invention
The utility model aims to provide an external gear shifting fork device, which is used for realizing transverse movement of a shifting fork after rotating by using a handle arranged on the side surface of a gear box, improving the installation space of gears and realizing meshing transmission of different gears.
In order to achieve the above object, the present utility model has the following technical scheme.
An external gear shifting fork device comprises a box body, wherein an input shaft is arranged at the upper part of the box body, a first gear, a clutch, a shifting fork and a second gear are respectively arranged on the input shaft from left to right, one end of the shifting fork is clamped and installed on the side surface of the clutch, and a shifting fork sliding shaft is arranged at the other end of the shifting fork; the two ends of the shifting fork sliding shaft are arranged on the box body; a shifting fork block is arranged on one side of the shifting fork far away from the gear by utilizing a shifting fork sliding block, a shifting fork pin shaft is arranged at the lower part of the shifting fork block, and the shifting fork pin shaft penetrates through the box body to be arranged; the end of the shifting fork pin shaft outside the box body is connected with a handle.
Further, a handle extension bar is arranged at the upper part of the handle, and threads are arranged at the lower part of the handle extension bar and screwed into the handle; the lower part of the handle extension bar is arranged on the handle by a first locknut.
Further, a stud is arranged in a threaded hole in the middle of the handle, a cavity is arranged on the left side of the stud, a spring is arranged in the cavity, a steel ball is arranged at the other end of the spring, and the steel ball is clamped in a box limiting groove arranged on the side wall of the box; the outer part of the stud is fixed by a second locknut.
Further, the lower part of the handle and the lower part of the shifting fork block are respectively provided with a first elastic cylindrical pin for fixing the left end and the right end of the shifting fork pin shaft.
Further, a second elastic cylindrical pin is arranged at the upper part of the shifting fork block to fix the shifting fork sliding block.
Further, the lower part of the box body is provided with a connecting shaft, the left end and the right end of the connecting shaft are respectively provided with a first matched gear and a second matched gear, and the first matched gear and the second matched gear are respectively meshed with the first gear and the second gear.
Further, a shifting fork slot is arranged on the side surface of the tail end of the shifting fork, the upper part and the lower part of the cross section of the shifting fork slot are semicircular, and the middle part is rectangular; the upper part of the front end of the shifting fork sliding block is provided with a cylinder which is consistent with the shape of the through hole on the side surface of the tail end of the shifting fork, and the rear end of the shifting fork sliding block is provided with a cylinder; the cylinder at the rear end of the shifting fork sliding block is matched with a through hole arranged on the side surface of the upper part of the shifting fork block; the cylinder side of shift fork slider rear end is equipped with the through-hole and is used for the fixed mounting of second elasticity cylindric lock.
The beneficial effects of the utility model are as follows:
(1) In the utility model, the upper and lower parts of the cross section of the shifting fork slotted hole are semicircular, and the middle part is rectangular; the upper part of the front end of the shifting fork sliding block is provided with a cylinder which is consistent with the shape of the through hole on the side surface of the tail end of the shifting fork, and the rear end of the shifting fork sliding block is provided with a cylinder; the cylinder of shift fork slider rear end matches with the through-hole that shift fork piece upper portion side set up. In the design, the shifting fork only can transversely slide on the shifting fork sliding shaft, the moving path of the handle rotates at a fixed angle by taking the circle center of the shifting fork pin shaft, and the cross section shape and the size position of the part, which is contacted with the shifting fork slot hole, of the shifting fork block are changed, so that when the shifting fork sliding block rotates in the same direction with the handle, the shifting fork sliding block rotates at the fixed angle by taking the circle center of the shifting fork pin shaft in the shifting fork slot hole. Therefore, the shifting fork can transversely slide on the shifting fork sliding shaft under the condition that the handle rotates. The design has the advantages that the moving path of the shifting fork sliding block in the shifting fork slot hole is changed into the angle change similar to the moving path of the handle, so that the types of parts of the gear shifting device and the required installation space are simplified.
(2) In the utility model, a screw bolt is arranged in a threaded hole in the middle part of a handle, a cavity is arranged on the left side of the screw bolt, a spring is arranged in the cavity, a steel ball is arranged at the other end of the spring, and the steel ball is clamped in a box body limiting groove arranged on the side wall of a box body; the outer part of the stud is fixed by a second locknut. In the structure, when the handle extension bar is rotated to reach a designated position, the steel balls fall into the limit groove of the box body, the spring returns to the natural length and props against the steel balls, shaking of the handle is reduced, and any gear is convenient to engage safely to participate in transmission. The design adopts the limiting device to prevent reasonable shaking in the running process of the gear box, and prevents the gear engaged in transmission from being separated from the clutch, thereby causing gear disengagement of the gear box.
Drawings
FIG. 1 is a schematic diagram of a device in a split configuration used in an embodiment of the present utility model.
Fig. 2 is a schematic view of a gear mounting structure of a device used in an embodiment of the present utility model.
Fig. 3 is a schematic perspective view of a shifting fork device used in an embodiment of the present utility model.
Fig. 4 is a schematic diagram of a fork structure used in an embodiment of the present utility model.
FIG. 5 is a schematic diagram of a limit stud used in an embodiment of the present utility model.
Fig. 6 is a schematic cross-sectional view of fig. 5.
Figure 7 is a rear side view of the present utility model.
Fig. 8 is a schematic view of section A-A of fig. 7.
Fig. 9 is a perspective view of the device of the present utility model after assembly.
The figure indicates: 1. an input shaft; 2. a handle extension bar; 3. a first locknut; 4. a second locknut; 5. a handle; 6. a first elastic cylindrical pin; 7. a shifting fork pin shaft; 8. a second elastic cylindrical pin; 9. a shift fork block; 10. a shifting fork; 11. a shifting fork sliding shaft; 12. a first gear; 13. a second gear; 14. a clutch; 15. a shift fork slide block; 16. steel balls; 17. a stud; 18. a spring; 19. a box body limit groove; 20. a case; 21. a connecting shaft; 22. a first mating gear; 23. and a second mating gear. 24. A shifting fork slot;
Detailed Description
The following description of specific embodiments of the utility model is provided in connection with the accompanying examples and figures to provide a better understanding of the utility model.
Examples
The external gear shifting fork device as shown in fig. 1 to 9 comprises a box body 20, wherein an input shaft 1 is arranged at the upper part of the box body 20, a first gear 12, a clutch 14, a shifting fork 10 and a second gear 13 are respectively arranged on the input shaft 1 from left to right, one end of the shifting fork 10 is clamped and installed on the side surface of the clutch 14, and a shifting fork sliding shaft 11 is arranged at the other end of the shifting fork 10; the two ends of the shifting fork sliding shaft 11 are arranged on the box body 20; a shifting fork block 9 is arranged on one side of the shifting fork 10 far away from the gear by utilizing a shifting fork sliding block 15, a shifting fork pin shaft 7 is arranged at the lower part of the shifting fork block 9, and the shifting fork pin shaft 7 penetrates through a box body 20 to be arranged; the end of the shifting fork pin shaft 7 outside the box body 20 is connected with a handle 5. The upper part of the handle 5 is provided with a handle extension bar 2, and the lower part of the handle extension bar 2 is provided with threads which are screwed into the handle 5; the lower part of the handle extension bar 2 is mounted on the handle 5 by a first locknut 3. The lower part of the handle 5 and the lower part of the shifting fork block 9 are respectively provided with a first elastic cylindrical pin 6 for fixing the left end and the right end of the shifting fork pin shaft 7. The upper part of the shifting fork block 9 is provided with a second elastic cylindrical pin 8 for fixing a shifting fork sliding block 15. The lower part of the box body 20 is provided with a connecting shaft 21, the left end and the right end of the connecting shaft 21 are respectively provided with a first matched gear 22 and a second matched gear 23, and the first matched gear 22 and the second matched gear 23 are respectively meshed with the first gear 12 and the second gear 13.
In the utility model, a stud 17 is arranged in a threaded hole in the middle part of a handle 5, a cavity is arranged at the left side of the stud 17, a spring 18 is arranged in the cavity, a steel ball 16 is arranged at the other end of the spring 18, and the steel ball 16 is clamped in a box body limiting groove 19 arranged on the side wall of a box body 20; the outside of the stud 17 is fixed by the second locknut 4. In the structure, when the handle extension bar 2 is rotated to reach a designated position, the steel balls 16 fall into the box body limiting grooves 19, the springs 18 return to the natural length and bear against the steel balls 16, shake of the handle 5 is reduced, and any gear is conveniently engaged safely to participate in transmission. The design adopts the limiting device to prevent reasonable shaking in the running process of the gear box, and prevents the gear engaged in transmission from being separated from the clutch, thereby causing gear disengagement of the gear box.
In the utility model, a shifting fork slot 24 is arranged on the side surface of the tail end of a shifting fork 10, the upper part and the lower part of the cross section of the shifting fork slot 24 are semicircular, and the middle part is rectangular; the upper part of the front end of the shifting fork sliding block 15 is provided with a cylinder which is consistent with the shape of a through hole on the side surface of the tail end of the shifting fork 10, and the rear end is provided with a cylinder; the cylinder at the rear end of the shifting fork slide block 15 is matched with a through hole arranged on the side surface of the upper part of the shifting fork block 9; the cylinder side of shift fork slider 15 rear end is equipped with the through-hole and is used for the fixed mounting of second elasticity cylindric lock 8. In the design, as the shifting fork 10 only can transversely slide on the shifting fork sliding shaft 11, the moving path of the handle 5 rotates by a fixed angle with the center of the shifting fork pin shaft 7, and the cross section shape and the size position of the contact part of the shifting fork block 9 and the shifting fork slotted hole 24 are changed, so that when the shifting fork sliding block 15 rotates in the same direction as the handle 5, the shifting fork sliding block 15 rotates by a fixed angle with the center of the shifting fork pin shaft 7 in the shifting fork slotted hole 24. Thus, the shifting fork 10 can transversely slide on the shifting fork sliding shaft 11 under the condition that the handle 5 rotates. The design has the advantages that the moving path of the shifting fork sliding block in the shifting fork slot hole is changed into the angle change similar to the moving path of the handle, so that the types of parts of the gear shifting device and the required installation space are simplified.
When the utility model specifically works, the handle extension bar 2 is rotated left and right, the handle 5 connected with the handle extension bar 2 moves along with the handle extension bar, the shifting fork block 9 is driven to rotate, the shifting fork sliding block 15 is driven to rotate in the shifting fork slotted hole 24 by the circle center of the shifting fork pin shaft 7 at a fixed angle, and the shifting fork 10 is pulled to slide left and right on the shifting fork sliding shaft 11. In the process, the special structure design in the shifting fork slot 24 enables the shifting fork slide block 15 to move downwards when rotating, and simultaneously pulls the shifting fork 10 to slide left and right. The other end of the shifting fork 10 is clamped into the clutch 14 and can drive the clutch 14 to slide left and right on the input shaft 1, so that the first gear 12 and the second gear 13 are connected to be meshed with the first matched gear 22 and the second matched gear 23 respectively for transmission. Because the first gear 12 and the second gear 13 have different moduli and different numbers of teeth, when the first gear 12 and the second gear 13 are respectively meshed with the first matched gear 22 and the second matched gear 23, transmission with different transmission ratios is realized. When the fork 10 is not connected to the two-gear, it is in neutral.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.
Claims (6)
1. An external gear shift fork device, includes box (20), its characterized in that: an input shaft (1) is arranged at the upper part of the box body (20), a first gear (12), a clutch (14), a shifting fork (10) and a second gear (13) are respectively arranged on the input shaft (1) from left to right, one end of the shifting fork (10) is clamped and installed on the side surface of the clutch (14), and a shifting fork sliding shaft (11) is arranged at the other end of the shifting fork (10); the two ends of the shifting fork sliding shaft (11) are arranged on the box body (20); a shifting fork block (9) is arranged on one side, far away from the gear, of the shifting fork (10) by utilizing a shifting fork sliding block (15), a shifting fork pin shaft (7) is arranged at the lower part of the shifting fork block (9), and the shifting fork pin shaft (7) penetrates through the box body (20) to be arranged; the end of the shifting fork pin shaft (7) at the outer side of the box body (20) is connected with a handle (5); a shifting fork slot hole (24) is formed in the side face of the tail end of the shifting fork (10), the upper part and the lower part of the cross section of the shifting fork slot hole (24) are semicircular, and the middle part of the cross section of the shifting fork slot hole is rectangular; the upper part of the front end of the shifting fork sliding block (15) is provided with a cylinder which is consistent with the shape of a through hole on the side surface of the tail end of the shifting fork (10), and the rear end of the shifting fork sliding block is provided with a cylinder; the cylinder at the rear end of the shifting fork sliding block (15) is matched with a through hole arranged on the side surface of the upper part of the shifting fork block (9); the side surface of the cylinder at the rear end of the shifting fork sliding block (15) is provided with a through hole for fixedly mounting the second elastic cylindrical pin (8).
2. The external gear shift fork device of claim 1, wherein: the upper part of the handle (5) is provided with a handle extension bar (2), and the lower part of the handle extension bar (2) is provided with threads which are screwed into the handle (5); the lower part of the handle extension bar (2) is arranged on the handle (5) by using a first locknut (3).
3. The external gear shift fork device of claim 1, wherein: a stud (17) is arranged in a threaded hole in the middle of the handle (5), a cavity is formed in the left side of the stud (17), a spring (18) is installed in the cavity, a steel ball (16) is arranged at the other end of the spring (18), and the steel ball (16) is clamped in a box body limiting groove (19) arranged on the side wall of a box body (20); the outside of the stud (17) is fixed by a second locknut (4).
4. The external gear shift fork device of claim 1, wherein: the lower part of the handle (5) and the lower part of the shifting fork block (9) are respectively provided with a first elastic cylindrical pin (6) for fixing the left end and the right end of the shifting fork pin shaft (7).
5. The external gear shift fork device of claim 1, wherein: the upper part of the shifting fork block (9) is provided with a second elastic cylindrical pin (8) for fixing a shifting fork sliding block (15).
6. The external gear shift fork device of claim 1, wherein: the box (20) lower part is equipped with connecting axle (21), both ends are equipped with first supporting gear (22) and second supporting gear (23) respectively about connecting axle (21), first supporting gear (22) and second supporting gear (23) respectively with first fender gear (12) and second fender gear (13) meshing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320373212.9U CN220727090U (en) | 2023-03-03 | 2023-03-03 | External gear shifting fork device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320373212.9U CN220727090U (en) | 2023-03-03 | 2023-03-03 | External gear shifting fork device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220727090U true CN220727090U (en) | 2024-04-05 |
Family
ID=90490502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320373212.9U Active CN220727090U (en) | 2023-03-03 | 2023-03-03 | External gear shifting fork device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220727090U (en) |
-
2023
- 2023-03-03 CN CN202320373212.9U patent/CN220727090U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |