Pull plate type multi-gear gearbox main box and auxiliary box interlocking mechanism

Abstract

The utility model discloses an interlocking mechanism for a main box and an auxiliary box of a pulling plate type multi-gear gearbox. The interlocking mechanism comprises a gear shifting pulling plate, a pulling plate rear supporting plate, an auxiliary box shifting fork shaft, an interlocking plate and an interlocking spring. A notch is formed in one end of the gear shifting pulling plate, a step-shaped step and a groove are formed in the interlocking plate, one end of the gear shifting pulling plate, the step-shaped step and the groove are installed in a matched mode, a chamfer is arranged on the interlocking plate, an interlocking groove is formed in the auxiliary box shifting fork shaft, and the chamfer and the interlocking groove are installed in a matched mode. The pulling plate rear supporting plate is fixed to the auxiliary box shifting fork shaft, the pulling plate rear supporting plate and the interlocking plate are installed in a rotating fit mode, and the interlocking spring is installed on the interlocking plate. The interlocking mechanism is simple in structure and small in occupied space, in the gear shifting process, the interlocking mechanism can achieve automatic interlocking of the main box and the auxiliary box through mechanical linkage, a synchronizer of the auxiliary box is prevented from being damaged when a high gear and a low gear of the gearbox are switched, and the service life of the gearbox is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of multi-gear transmissions, and in particular to a pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism. Background Technology

[0002] The gearbox shift mechanism, as one of the core components of the entire gearbox system, primarily functions to directly reflect the gearbox's shifting performance. In the automotive manufacturing industry, gearbox shift mechanisms are currently commonly divided into two main categories based on their structural characteristics and application scenarios: shift fork shaft type mechanisms and pull plate type mechanisms. Shift fork shaft type mechanisms achieve precise selection of different gears through a series of shift forks and bearing assemblies. While their structure is relatively complex, they offer a direct and stable shifting feel and are often used in vehicles requiring extremely high shifting precision. Pull plate type mechanisms occupy less space, are lightweight, have a simpler structure, and require less material, effectively controlling overall costs. They are also easy to install and disassemble, offering significant convenience for vehicle maintenance and repair, and are widely used in multi-speed commercial vehicles.

[0003] However, in heavy-duty trucks and other vehicles that demand extremely high power and torque, multi-speed transmissions often include an auxiliary gearbox to handle complex and varied operating conditions. While this design enhances transmission performance, the significant torque changes and the instantaneous impact on the synchronizer during gear shifts can easily damage the rear auxiliary gearbox synchronizer, posing a pressing technical challenge. Summary of the Invention

[0004] The purpose of this utility model is to provide a pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism to solve the problem that the rear auxiliary gearbox synchronizer is easily damaged when switching between high and low gears in existing transmissions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lever-type multi-gear transmission main and auxiliary gearbox interlock mechanism includes a shift lever, a lever rear support plate, an auxiliary gearbox shift fork shaft, an interlock plate, and an interlock spring;

[0007] One end of the shift lever has a notch, and the interlock plate has a stepped step and a groove. One end of the shift lever is installed in conjunction with the stepped step and the groove. The interlock plate has a chamfer. The auxiliary gearbox shift fork shaft has an interlock groove. The chamfer is installed in conjunction with the interlock groove. The rear support plate of the lever is fixed on the auxiliary gearbox shift fork shaft. The rear support plate of the lever is rotatably installed with the interlock plate. The interlock spring is installed on the interlock plate.

[0008] Furthermore, a through hole is provided on the rear support plate of the pull plate, and one end of the shift pull plate passes through the through hole.

[0009] Furthermore, the shift lever includes a second- and third-gear lever, a fourth- and fifth-gear lever, and a reverse gear lever.

[0010] Furthermore, a first notch is provided at one end of the second and third gear pull plates, a second notch is provided at one end of the fourth and fifth gear pull plates, and a third notch is provided at one end of the first reverse gear pull plate.

[0011] Furthermore, the first notch, the second notch, and the third notch are installed in conjunction with the stepped steps and grooves.

[0012] Furthermore, a fourth notch is provided on the edge of the rear support plate of the pull plate, and the fourth notch is installed in conjunction with the auxiliary box shift fork shaft.

[0013] Furthermore, a frustum is provided on the rear support plate of the pull plate, and a circular hole is provided on the interlock plate, with the frustum installed in the circular hole.

[0014] Furthermore, the interlock plate is provided with a boss, and one end of the interlock spring is mounted on the boss.

[0015] Furthermore, the interlock plate is fixed to the gearbox housing by a retaining ring.

[0016] Furthermore, a through hole is provided on the gearbox housing, one end of the interlock spring passes through the through hole on the gearbox housing and is mounted on the interlock plate, and a screw plug is installed on the other end of the interlock spring.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention provides a pull-plate type interlock mechanism for the main and auxiliary gearboxes of a multi-speed transmission. A notch is created at one end of the shift pull plate, and a stepped step and groove are formed on the interlock plate. The one end of the shift pull plate mates with the stepped step and groove, ensuring precise positioning and stable connection of the shift pull plate during gear shifting, thus improving shift smoothness and reliability. A chamfer is provided on the interlock plate, and an interlock groove is formed on the auxiliary gearbox shift fork shaft, allowing the chamfer to mate with the interlock groove. A rear support plate of the shift pull plate is fixed to the auxiliary gearbox shift fork shaft, and the rear support plate and interlock plate are rotatably fitted together. An interlock spring is mounted on the interlock plate, and the shifting function is achieved through rotational engagement. The interlock spring provides continuous interlocking force, eliminating the need for external control. This invention features a simple structure, occupies little space, and offers greater flexibility in vehicle layout. During gear shifting, the interlock mechanism ensures proper coordination and sequential action between components. Through mechanical linkage, it achieves automatic interlocking between the main and auxiliary gearboxes, preventing damage to the auxiliary gearbox synchronizer when switching between high and low gears and extending the service life of the gearbox. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the assembly of the main and auxiliary gearbox interlock mechanism of the pull-plate type multi-gear transmission of this utility model.

[0021] Figure 2 This is a schematic diagram of the assembly of the main and auxiliary gearbox interlock mechanism of the pull-plate type multi-gear transmission of this utility model.

[0022] Figure 3 This is a schematic diagram of the interlock plate of the main and auxiliary gearbox interlock mechanism of the pull-plate type multi-gear transmission of this utility model.

[0023] Figure 4 This is a schematic diagram of the auxiliary gearbox shift fork shaft of the main and auxiliary gearbox interlock mechanism of the pull-plate type multi-gear transmission of this utility model.

[0024] Figure 5 This is a schematic diagram of the rear support plate of the pull plate of the main and auxiliary gearbox interlocking mechanism of the pull plate type multi-gear transmission of this utility model.

[0025] Figure 6 This is a schematic diagram of the interlocking spring in the main and auxiliary gearbox interlocking mechanism of the pull-plate type multi-gear transmission of this utility model.

[0026] Figure 7 This is a schematic diagram of the screw plug of the main and auxiliary gearbox interlocking mechanism of the pull-plate type multi-gear transmission of this utility model.

[0027] Figure 8 This is a schematic diagram of the main gearbox second and third gear pull plate of the pull plate type multi-gear transmission main and auxiliary gearbox interlock mechanism of this utility model.

[0028] Figure 9 This is a schematic diagram of the structure of the fourth and fifth gear pull plate of the main gearbox of the pull plate type multi-gear transmission interlock mechanism of this utility model.

[0029] Figure 10 This is a schematic diagram of the main gearbox and reverse gear pull plate of the pull plate type multi-gear transmission main and auxiliary gearbox interlock mechanism of this utility model.

[0030] Figure 11 This is a schematic diagram of the main and auxiliary gearbox interlock mechanism of the pull-plate type multi-gear transmission of this utility model when the auxiliary gearbox is in the unlocked state.

[0031] Figure 12This is a schematic diagram of the main and auxiliary gearbox interlocking mechanism of the pull-plate type multi-gear transmission of this utility model when the auxiliary gearbox is in the locked state.

[0032] Wherein: 1-Second and third gear pull plates, 2-Fourth and fifth gear pull plates, 3-First reverse gear pull plate, 4-Pulley rear support plate, 5-Sub-box shift fork shaft, 6-Interlock plate, 7-Interlock spring, 8-Plug, 11-First notch, 21-Second notch, 31-Third notch, 41-Through hole, 42-Frustum, 51-Interlock groove, 61-Stepped step, 62-Groove, 63-Round hole, 64-Boss, 65-Chamfer. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The present invention will now be described in further detail with reference to the accompanying drawings:

[0040] See Figure 1 and Figure 2 This utility model provides a pull-plate type multi-speed gearbox main and auxiliary gearbox interlock mechanism, including a shift pull plate, a pull plate rear support plate 4, an auxiliary gearbox shift fork shaft 5, an interlock plate 6, an interlock spring 7, and a screw plug 8. One end of the shift pull plate is fitted with the interlock plate 6.

[0041] The shift levers include a second / third gear lever 1, a fourth / fifth gear lever 2, and a reverse gear lever 3, all of which are located in the main gearbox. Figures 8 to 10 As shown, the second and third gear shifters 1 have a first notch 11 at one end, the fourth and fifth gear shifters 2 have a second notch 21 at one end, and the reverse gear shifter 3 has a third notch 31 at one end. Figure 3 As shown, the interlocking plate 6 has a stepped step 61 and a groove 62. The first notch 11, the second notch 21 and the third notch 31 are installed in conjunction with the stepped step 61 and the groove 62.

[0042] like Figure 5 As shown, a fourth notch is provided on the edge of the rear support plate 4 of the shift plate, and the fourth notch is fixedly installed in conjunction with the auxiliary gearbox shift fork shaft 5. A through hole 41 is provided on the rear support plate 4 of the shift plate, and one end of the notch of the shift plate passes through the through hole 41. A frustum 42 is provided on the rear support plate 4 of the shift plate, and a circular hole 63 is provided on the interlock plate 6. The frustum 42 is installed in the circular hole 63, and the circular hole 63 cooperates with the frustum 42, so that the interlock plate 6 can rotate around the frustum 42 of the rear support plate 4 of the shift plate.

[0043] like Figure 4 As shown, the auxiliary gearbox shift fork shaft 5 has an interlocking groove 51, and the edge of the interlocking plate 6 has a chamfer 65 to mate with the interlocking groove 51 on the auxiliary gearbox shift fork shaft 5. The pull plate and the rear support plate 4 press and fix the interlocking plate 6 onto the gearbox housing and secure it with a retaining ring. The gearbox housing has a through hole, and the interlocking plate 6 has a boss 64. The interlocking spring 7... Figure 6As shown, one end passes through a through hole in the gearbox housing and is mounted on the boss 64, while the other end is fitted with a screw plug 8, as shown. Figure 7 As shown, it is tightened by screw plug 8.

[0044] The specific working method of the main and auxiliary gearbox interlocking mechanism of the pull-plate type multi-gear transmission of this utility model:

[0045] When the auxiliary gearbox is in gear, the interlock plate 6, under the force of the interlock spring 7, is pressed into the interlock groove 51 on the auxiliary gearbox shift fork shaft 5, such as... Figure 11 As shown, at this time, the stepped steps 61 and grooves 62 on the interlock plate 6 separate from the notches on each shift pull plate, so that the shift pull plates can move back and forth to realize the shifting of the main gearbox.

[0046] When the auxiliary gearbox is in shifting mode, the auxiliary gearbox shift fork shaft 5 presses against the interlock plate 6 to overcome the clamping force of the interlock spring 7, causing the interlock plate 6 to rotate clockwise along the circular hole 63 by a certain angle, such as... Figure 12 As shown, at this time, the stepped steps 61 and grooves 62 on the interlock plate 6 are precisely engaged in the notches on each shift pull plate, preventing the shift pull plates from moving, thereby realizing the function of interlocking the main and auxiliary gearboxes.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism, characterized in that, It includes a shift lever, a rear support plate (4), a secondary gearbox shift fork shaft (5), an interlock plate (6), and an interlock spring (7). One end of the shift lever is provided with a notch, and the interlock plate (6) is provided with a stepped step (61) and a groove (62). One end of the shift lever is installed in conjunction with the stepped step (61) and the groove (62). The interlock plate (6) is provided with a chamfer (65). The auxiliary gearbox shift fork shaft (5) is provided with an interlock groove (51). The chamfer (65) is installed in conjunction with the interlock groove (51). The rear support plate (4) of the lever is fixed on the auxiliary gearbox shift fork shaft (5). The rear support plate (4) of the lever is rotatably installed with the interlock plate (6). The interlock spring (7) is installed on the interlock plate (6).

2. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 1, characterized in that, A through hole (41) is provided on the rear support plate (4) of the shift plate, and one end of the shift plate passes through the through hole (41).

3. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 1, characterized in that, The shift levers include a second and third gear lever (1), a fourth and fifth gear lever (2), and a reverse gear lever (3).

4. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 3, characterized in that, The second and third gear pull plates (1) have a first notch (11) at one end, the fourth and fifth gear pull plates (2) have a second notch (21) at one end, and the first reverse gear pull plate (3) has a third notch (31) at one end.

5. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 4, characterized in that, The first notch (11), the second notch (21) and the third notch (31) are installed in conjunction with the stepped step (61) and the groove (62).

6. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 1, characterized in that, A fourth notch is provided on the edge of the rear support plate (4) of the pull plate, and the fourth notch is installed in conjunction with the auxiliary box shift fork shaft (5).

7. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 1, characterized in that, A frustum (42) is provided on the rear support plate (4) of the pull plate, and a circular hole (63) is provided on the interlock plate (6), and the frustum (42) is installed in the circular hole (63).

8. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 1, characterized in that, The interlock plate (6) is provided with a boss (64), and one end of the interlock spring (7) is installed on the boss (64).

9. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 1, characterized in that, The interlock plate (6) is fixed to the gearbox housing by a retaining ring.

10. The pull-plate type multi-gear transmission main and auxiliary gearbox interlock mechanism according to claim 9, characterized in that, The gearbox housing has a through hole, one end of the interlock spring (7) passes through the through hole on the gearbox housing and is installed on the interlock plate (6), and the other end of the interlock spring (7) is fitted with a screw plug (8).

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