Reverse hook type anti-over-gear shift arm assembly and speed change drum control mechanism
By adding a reverse hook structure to the limit component, the problem of skipped gear shifting in the gear shift drum operating mechanism is solved, resulting in higher driving safety and a better user experience.
Patent Information
- Application Number
- CN202520844497.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-04-29
AI Technical Summary
The existing gear shifting drum control mechanism is prone to skipping gears during use, posing a driving safety hazard, especially when there are many gears, resulting in a poor user experience.
Design a reverse hook type anti-overshifting shift arm assembly. By adding a reverse hook structure to the limiting component, it forms a locked state with the shifting boss of the shifting disc, preventing the shifting disc from continuing to rotate and avoiding skipping shifts.
It effectively prevents skipped gear shifts in the transmission drum, improving driving safety and user experience.
Smart Images
Figure CN223881694U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transmission and engine parts technical field, concretely relates to a kind of anti-hook type prevents overgear shift shift arm assembly and variable speed drum operating mechanism. BACKGROUND
[0002] Variable speed drum is important component in the transmission of motorcycle, tricycle and other motor vehicles, generally uses foot drive to shift, and variable speed drum operating mechanism generally includes shift arm assembly and shift dial driven by shift arm and realizes gear shifting by shift fork in transmission, wherein shift arm assembly is the intermediate structure of transmission shift power, including shift arm and shift plate driven by shift arm, and shift plate plays the role of pawl, for driving shift dial rotation. According to market feedback, existing variable speed drum operating mechanism is prone to jump gear shifting in use process, and there is big driving safety hazard. Especially for the variable speed drum with more gears, the included angle between adjacent two shift bosses on shift dial is small, and jump gear shifting is prone to occur due to inertia rotation of variable speed drum. Although the precision of parts is improved repeatedly to solve this problem, it cannot be effectively eradicated, and users are careful when shifting, there is certain driving safety hazard, and user experience is poor.
[0003] Therefore, it is necessary to provide a new shift arm assembly and variable speed drum operating mechanism, which is expected to effectively avoid jump gear shifting of variable speed drum, so as to improve driving safety and user experience. SUMMARY
[0004] Therefore, the utility model provides a kind of anti-hook type prevents overgear shift shift arm assembly and variable speed drum operating mechanism, which can effectively avoid jump gear shifting of variable speed drum, so as to improve driving safety and user experience.
[0005] To achieve the above object, the utility model provides the following technical scheme: an anti-hook type prevents overgear shift shift arm assembly, including shift arm and linkage setting on shift arm for preventing shift dial overgear rotation limiting piece;The limiting piece is equipped with the anti-hook for being hooked on the shift boss on shift dial in the opposite direction of shift dial rotation after gear shifting.
[0006] Further, the limiting piece is a limiting plate, and the anti-hook is integrally formed on the outer end of the limiting plate.
[0007] Further, the matching surface of the anti-hook and the shift boss is an arc-shaped concave surface.
[0008] Further, the outer end edge of the arc-shaped concave surface is provided with an anti-collision round corner.
[0009] Further, the reverse hooks are two groups, and the two groups of reverse hooks are oppositely symmetrically arranged at two ends of the limiting plate in the rotating direction.
[0010] Further, the gear shifting plate is further provided with a driving port, and the driving port is used for cooperating with the gear shifting boss to drive the gear shifting disc to rotate.
[0011] Further, the gear shifting arm assembly further comprises a reset torsional spring and a compression spring, the reset torsional spring is arranged between the gear shifting arm or the gear shifting plate or the limiting piece and the transmission box body, and is used for driving the gear shifting plate to reset after gear shifting.
[0012] The gear shifting plate is axially single-degree-of-freedom slidably sleeved on the gear shifting arm, and the gear shifting plate is pushed to the gear shifting disc side by the compression spring.
[0013] Further, the limiting piece is fixed on the gear shifting arm, and a guide pin arranged in the axial direction of the gear shifting arm is fixed on the limiting piece, and the gear shifting plate is axially slidably arranged on the guide pin.
[0014] Further, the operation end of the gear shifting arm is provided with a tooth-shaped connecting part used for connecting an external operation mechanism.
[0015] The gear shifting drum operating mechanism comprises the reverse hook type over-shifting prevention gear shifting arm assembly.
[0016] Compared with the prior art, the reverse hook type over-shifting prevention gear shifting arm assembly has the following beneficial effects:
[0017] The reverse hook type over-shifting prevention gear shifting arm assembly and the gear shifting drum operating mechanism have the following beneficial effects: the structure of the limiting piece is improved, the reverse hook part arranged on the limiting piece can be locked with the gear shifting boss, the rotational inertia of the gear shifting drum can be effectively overcome, the gear shifting drum can be effectively prevented from jumping gear shifting, and the driving safety and user experience can be improved.
[0018] Other advantages, objects and features of the present application will be apparent from the following detailed description of the application and from the appended claims. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 The shaft side structure schematic view of an embodiment of the present application without the gear shifting plate;
[0020] Figure 2 The shaft side structure schematic view of an embodiment of the present application without the gear shifting plate;
[0021] Figure 3 Structure diagram of the limiting piece of an embodiment of the utility model;
[0022] Figure 4 Structure diagram of the gear shifting plate and the gear shifting disc of an embodiment of the utility model;
[0023] Reference signs: 1-gear shifting arm; 2-limiting piece; 201-counter hook; 201a-arc-shaped inner concave surface; 201b-anti-collision round corner; 3-gear shifting disc; 3a-gear shifting boss; 4-gear shifting plate; 401-driving port; 5-reset torsional spring; 6-pressing spring; 7-guiding pin; 8-speed drum. DETAILED DESCRIPTION
[0024] The embodiments of the utility model will be described below through specific examples. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The utility model can also be implemented or applied through different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic concept of the utility model, and the following embodiments and features in the embodiments can be combined with each other without conflict.
[0025] Please refer to Figures 1-4The embodiment discloses a reverse hook type anti-overtravel gear shifting arm assembly, which comprises a gear shifting arm 1 and a limiting piece 2 which is connected with the gear shifting arm 1 and used for preventing overtravel rotation of a gear shifting disc 3. The limiting piece 2 is provided with a reverse hook 201 which is used for being hooked on a gear shifting boss 3a of the gear shifting disc 3 in the opposite direction of the gear shifting disc 3 after gear shifting is completed. In use, the gear shifting disc 3 is in transmission connection with a gear drum 8, the number of the gear shifting bosses 3a corresponds to the number of gear positions of the gear drum 8, the gear shifting disc 3 forms a ratchet structure, and the structure of the gear shifting disc 3 is a prior art, which will not be repeated here. It can be understood that, in design, the reverse hook 201 on the limiting piece 2 can be hooked on the gear shifting boss 3a in the corresponding position after the gear shifting arm assembly drives the gear shifting disc 3 to rotate to complete gear shifting of one gear position. Since the reverse hook 201 can be hooked on the gear shifting boss 3a of the gear shifting disc 3 in the opposite direction of the gear shifting disc 3, the reverse hook 201 and the gear shifting boss 3a can be in a locked state, thereby effectively preventing the gear shifting disc 3 from continuing to rotate, avoiding the possibility of the gear shifting disc 3 continuing to rotate from the root, effectively avoiding the gear drum from jumping gear shifting due to rotational inertia, and thereby improving user experience and driving safety. Here, the locked state of the reverse hook 201 and the gear shifting boss 3a refers to that the limiting piece 2 and the gear shifting boss 3a will not be separated during inertial rotation of the gear shifting disc 3. The principle is that the force applied by the gear shifting boss 3a to the limiting piece 2 is offset by the reverse hook 201, and the limiting piece 2 cannot be driven to rotate to separate from the gear shifting boss 3a. Of course, it can be understood that, since the limiting piece 2 is connected with the gear shifting arm 1, the limiting piece 2 can rotate to release the locked state with the gear shifting boss 3a under the driving of the gear shifting arm 1 in the next gear shifting.
[0026] In the embodiment, the limiting piece 2 is a limiting plate, and the reverse hook 201 is integrally formed at an outer end of the limiting plate. Here, the outer end refers to the side far away from the gear shifting arm 3. The limiting piece 2 in the structure design is simple in structure, good in compactness and high in structural strength.
[0027] In the embodiment, the matching surface of the reverse hook 201 and the gear shifting boss 3a is an arc-shaped concave surface 201a. Here, the concave surface refers to the side far away from the gear shifting boss 3a. More specifically, the concave surface is a circular arc-shaped concave surface, and the arc-shaped concave surface 201a is smoothly connected to the limiting plate body at one end close to the gear shifting arm 3. The arc-shaped concave structure is good in structural strength and good in matching effect with the gear shifting boss 3a, thereby being beneficial to guaranteeing the use durability and service life of the reverse hook 201, and being simple in structure and beneficial to processing.
[0028] In the embodiment, the outer end edge of the arc-shaped inner concave surface 201a is provided with an anti-collision round corner 201b. Here, "outer end" refers to the end far away from the shift arm 3. The anti-collision round corner 201b can effectively reduce the impact of the reverse hook 201 on the shift boss 3a on the shift disc 3 during shifting, avoid the risk of damage such as pits on the shift boss 3a, and further improve the use reliability and durability of the entire operating mechanism.
[0029] In the embodiment, the reverse hook 201 is two groups, and the two groups of reverse hooks 201 are symmetrically arranged at the two ends of the limiting plate in the rotation direction. The structure of the two groups of reverse hooks 201 can meet the bidirectional use safety requirements during gear adding or reducing operations.
[0030] In the embodiment, the shift lever 1 is further provided with a shift plate 4 that rotates synchronously with the shift lever 1. The shift plate 4 is provided with a driving port 401 and drives the shift disc 3 to rotate by cooperating with the shift boss 3a through the driving port 401. During shifting, the shift lever 1 is driven to rotate, thereby driving the shift plate 4 to swing. The shift boss 3a on the shift disc 3 is located in the driving port 401 of the shift plate 4, so that when the shift plate 4 swings, the inner side wall of the driving port 401 can push the shift boss 3a to move, thereby driving the shift disc 3 to rotate and finally driving the shift drum 8 to rotate to complete the gear shifting. A slope is arranged on the end surface of the shift plate 4 opposite to the shift disc 3, and the slope is used to push the shift plate 4 to slide axially to make room when the shift plate 4 is reset, thereby avoiding interference between the shift plate 4 and the shift disc 3 during the reset stroke.
[0031] In the embodiment, the reset torsional spring 5 and the compression spring 6 are further included. The reset torsional spring 5 acts between the shift lever 1 or the shift plate 4 or the limiting member 2 and the transmission case to drive the shift plate 4 to reset after shifting. The shift plate 4 is axially and single-dimensionally slidably sleeved on the shift lever 1, and the shift plate 4 is pushed to the side of the shift disc 3 by the compression spring 6. After shifting is completed, the shift plate 4 is reversed under the action of the reset torsional spring 5, and the driving port 401 can be aligned with another shift boss 3a, so as to ensure that the shift plate 4 can be swung again to perform the next gear shifting. After the shift plate 5 is swung to complete the gear shifting, the shift plate 5 is first reset in the circumferential direction under the drive of the reset torsional spring 4, and then slides axially to the side of the shift disc 2 under the elastic force of the compression spring 7, so that the driving port 501 is clamped into another shift boss 201, thereby ensuring that the shift plate 5 can be swung again to perform the next gear shifting.
[0032] In the embodiment, the limiting piece 2 is fixed on the shift arm 1, and a guide pin 7 is fixed on the limiting piece 2 and arranged along the axial direction of the shift arm 1, and the shift knob 4 is arranged on the guide pin 7 and can axially slide. The guide pin 7 arranged on the limiting piece 4 can facilitate the single free sliding of the shift knob 4 in the axial direction, and the structure is simple and beneficial to cost control.
[0033] In the embodiment, the operation end of the shift arm 1 is provided with a tooth-shaped connecting part 1a for connecting an external operation mechanism. In this embodiment, the tooth-shaped connecting part 1a adopts a spline structure. The external operation mechanism herein refers to an operation part outside the gearbox. The tooth-shaped connecting part 1a facilitates the convenience of connection, has good structural strength, and has a long service life of the part. In addition, in order to prevent the axial anti-reverse shift ring of the shift arm 1 from scratching the working surface of the gearbox during rotation, an anti-friction washer is arranged on the shift arm.
[0034] The embodiment also discloses a shift drum operating mechanism comprising the anti-hook type anti-over-shift shift arm assembly. The shift drum operating mechanism can effectively overcome the rotational inertia of the shift drum, effectively prevent the shift drum from jumping gears, and further improve the user experience and driving safety.
[0035] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.
Claims
1. A reverse hooking anti-overshift shift arm assembly characterized by: The gear shift arm (1) and the limiting member (2) are connected by linkage, and the limiting member (2) is arranged on the gear shift arm (1) to prevent the gear shift disc (3) from over-shifting. The limiting member (2) is provided with an anti-hook (201) for hooking the shift boss (3a) of the gear shift disc (3) in the opposite direction of the gear shift disc (3) after the gear shift is completed.
2. The underhook anti-lash shift arm assembly of claim 1, wherein: The limiting member (2) is a limiting plate, and the anti-hook (201) is integrally formed on the outer end of the limiting plate.
3. The underhook anti-roll shift arm assembly of claim 2, wherein: The matching surface of the anti-hook (201) and the shift boss (3a) is an arc-shaped concave surface (201a).
4. The underhook anti-roll shift arm assembly of claim 3, wherein: The outer end edge of the arc-shaped concave surface (201a) is provided with a collision-avoiding round corner (201b).
5. The underhook anti-roll shift arm assembly of claim 2, wherein: The anti-hook (201) is two groups, and the two groups of anti-hooks (201) are symmetrically arranged at the two ends of the limiting plate in the rotating direction.
6. The underhook anti-roll shift arm assembly of claim 1, wherein: The gear shift arm (1) and the gear shift disc (3) are synchronously rotated, and the gear shift disc (3) is provided with a driving port (401) and is driven to rotate by the gear shift disc (3) through the cooperation of the driving port (401) and the shift boss (3a).
7. The underhook anti-roll shift arm assembly of claim 6, wherein: The gear shift arm (1) and the gear shift disc (3) are synchronously rotated, and the gear shift disc (3) is provided with a driving port (401) and is driven to rotate by the gear shift disc (3) through the cooperation of the driving port (401) and the shift boss (3a). The gear shift arm (1) and the gear shift disc (3) are synchronously rotated, and the gear shift disc (3) is provided with a driving port (401) and is driven to rotate by the gear shift disc (3) through the cooperation of the driving port (401) and the shift boss (3a).
8. The underhook anti-roll shift arm assembly of claim 7, wherein: The gear shift arm (1) and the gear shift disc (3) are synchronously rotated, and the gear shift disc (3) is provided with a driving port (401) and is driven to rotate by the gear shift disc (3) through the cooperation of the driving port (401) and the shift boss (3a).
9. The underhook anti-roll shift arm assembly of claim 1, wherein: The gear shift arm (1) is provided with a tooth-shaped connecting part (1a) for connecting an external operating mechanism.
10. A variable speed drum operating mechanism characterized by: The gear shift arm (1) and the gear shift disc (3) are synchronously rotated, and the gear shift disc (3) is provided with a driving port (401) and is driven to rotate by the gear shift disc (3) through the cooperation of the driving port (401) and the shift boss (3a).