Gear shifting executing mechanism of double-fork-shaft transmission

Abstract

The utility model discloses a double-fork-shaft transmission gear shifting executing mechanism, and belongs to the technical field of transmission gear shifting. Comprising a first-second gear shifting fork shaft and a third-fourth gear shifting fork shaft which are arranged on a clutch shell and a transmission shell. The third-gear and fourth-gear shifting fork shaft is sleeved with a third-gear and fourth-gear shifting fork. The first and second gear shifting fork shaft is sequentially sleeved with a reverse gear shifting fork, a first and second gear shifting fork and a reverse gear guide block; the reverse gear shifting fork is farthest from the clutch shell, and the guide block is located between the first-second gear shifting fork and the third-fourth gear shifting fork. The gear shifting executing mechanism and the transmission shell are integrated together, the structure is compact, and the height of the whole box is reduced; the number of the shifting fork shafts is reduced from 3-4 to 2, an upper cover shell is omitted, assembly procedures are reduced, installation bolts are reduced, the weight is reduced, installation is easy, cost is saved, and wide application prospects are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission shifting, and relates to a double-fork shaft transmission shifting actuator. Background Art

[0002] With the development of the commercial vehicle industry and the fierce market competition, the number of auto parts is increasing. As the weight of the vehicle increases, the assembly space of the vehicle becomes more compact. Lightweight and simple are the requirements put forward by the industry for auto parts. As an important component in the automobile transmission system, the transmission assembly must be optimized and improved from the above perspectives to better meet the requirements of the vehicle. At the same time, the structure is simple, the transmission parts are reduced, and the failure rate is lower.

[0003] The manual transmission is composed of a housing, shafts, gears, an upper cover assembly, an operating assembly, etc. The upper cover assembly is mounted on the transmission housing, and the operating assembly is mounted on the upper cover. When shifting gears is required, the operating assembly controls the shift fork shaft of the upper cover assembly, and then the shift fork shaft drives the shift fork to move to shift gears. For an ordinary 8-speed transmission, there are 3-4 shift fork shafts. The structure is relatively complex, the assembly process is relatively cumbersome, especially when used on light trucks, it occupies a large space and has a high production cost. Utility Model Content

[0004] The utility model aims to solve the technical problems of the prior art that the double fork shaft transmission has a complex structure, complicated assembly, large occupied space and high cost, and provides a double fork shaft transmission shift actuator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a double-fork shaft transmission shift actuator, comprising a first- and second-gear shift fork shaft and a third- and fourth-gear shift fork shaft arranged on a clutch housing and a transmission housing; the third- and fourth-gear shift fork shaft is sleeved with a third- and fourth-gear shift fork; the first- and second-gear shift fork shaft is sequentially sleeved with a reverse gear shift fork, a first- and second-gear shift fork and a reverse gear guide block; the reverse gear shift fork is arranged away from the clutch housing, and the guide block is located between the first- and second-gear shift fork and the third- and fourth-gear shift fork.

[0007] Furthermore, one side of the first and second gear shift fork is connected to a first and second gear guide block; one side of the third and fourth gear shift fork is connected to a third and fourth gear guide block; the first and second gear guide block and the third and fourth gear guide block are both located between the first and second gear shift fork and the third and fourth gear shift fork.

[0008] Furthermore, the first and second gear shift forks are die-cast as one piece with the first and second gear guide blocks during die-casting.

[0009] Furthermore, the third and fourth gear shift forks are die-cast as one piece with the third and fourth gear guide blocks during die-casting.

[0010] Furthermore, an integrated self-locking block is provided on the first and second gear shift forks; the self-locking block is used to cooperate with the first and second gear self-locking column pins to achieve gear self-locking.

[0011] Furthermore, the self-locking block has a tooth-shaped structure.

[0012] Furthermore, the third and fourth gear shift forks are fixed on the third and fourth gear shift fork shafts through elastic pins; and the reverse gear shift fork and guide block are fixed on the first and second gear shift fork shafts through elastic pins respectively.

[0013] Furthermore, the first- and second-gear shift fork body is made of aluminum alloy, and the first- and second-gear guide blocks and the self-locking block are made of steel.

[0014] Furthermore, the third and fourth gear shift fork body is made of aluminum alloy material, and the third and fourth gear guide block is made of steel.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses a double-fork shaft transmission shift actuator, which integrates the shift actuator with the transmission housing, has a compact structure, and reduces the height of the entire case. In addition, the utility model reduces the number of shift fork shafts from 3-4 to 2, eliminates the upper cover housing, reduces the assembly process, reduces the number of mounting bolts, reduces the weight, simplifies installation, saves costs, and has broad application prospects.

[0017] Furthermore, the utility model integrates a self-locking structure matched with a self-locking pin on the first and second gear shift forks, making the structure more compact.

[0018] Furthermore, the first and second gear shift forks and the third and fourth gear shift forks of the utility model are all made of aluminum alloy material, so that the overall weight is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Among them: 1-clutch housing; 2-transmission housing; 3-first and second gear shift fork shaft; 4-third and fourth gear shift fork shaft; 5-first and second gear shift fork; 6-third and fourth gear shift fork; 7-reverse gear shift fork; 8-first and second gear self-locking column pin; 9-reverse gear guide block; 10-first and second gear guide block; 11-third and fourth gear guide block; 12-self-locking block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The utility model is further described in detail below with reference to the accompanying drawings:

[0029] For trucks, due to the complex terrain, each mission may experience plains, mountains, and plateaus at the same time. Therefore, the C8J45 / 50T series transmission was developed. This transmission has a small torque but more gears. This means that the transmission shifting structure is more complicated, but its application on light trucks requires a very compact structural design. Therefore, the utility model specially designs the upper cover assembly and the transmission housing as an integrated structure.

[0030] See also Figure 1 The embodiment of the utility model discloses a double fork shaft transmission shift actuator, characterized in that it comprises a first and second gear shift fork shaft 3 and a third and fourth gear shift fork shaft 4 arranged on a clutch housing 1 and a transmission housing 2; the third and fourth gear shift fork shaft 4 is sleeved with a third and fourth gear shift fork 6; the first and second gear shift fork shaft 3 is sleeved with a reverse gear shift fork 7, a first and second gear shift fork 5 and a reverse gear guide block 9 in sequence; the first and second gear shift fork 5 is movably connected to the first and second gear shift fork shaft 3; the reverse gear shift fork 7 is arranged away from the clutch housing 1, and the guide block 9 is located between the first and second gear shift fork 5 and the third and fourth gear shift fork 6. The shift actuator is integrated with the transmission housing, the structure is compact, and the height of the whole box is reduced; and the utility model reduces the number of fork shafts from 3-4 to 2, cancels the upper cover housing, reduces the assembly process, reduces the number of mounting bolts, reduces the weight, is simple to install, saves costs, and has a wide range of application prospects.

[0031] In a feasible implementation manner of the present invention, a first and second gear guide block 10 is connected to one side of the first and second gear shift fork 5; a third and fourth gear guide block 11 is connected to one side of the third and fourth gear shift fork 6; the first and second gear guide block 10 and the third and fourth gear guide block 11 are both located between the first and second gear shift fork 5 and the third and fourth gear shift fork 6.

[0032] In a feasible implementation manner of the utility model, the first and second gear shift forks 5 are die-cast as one with the first and second gear guide blocks 10; the third and fourth gear shift forks 6 are die-cast as one with the third and fourth gear guide blocks 11; the assembly process is simplified and the production efficiency is improved.

[0033] In a feasible implementation of the utility model, an integrated self-locking block 12 is provided on the first and second gear shift forks 5; the self-locking block 12 is used to cooperate with the first and second gear self-locking pins 8 to achieve self-locking of the gear positions, and the self-locking pins 8 are installed on the transmission housing. The self-locking block 12 has a tooth-like structure, and the self-locking pins 8 are clamped in the tooth grooves of the self-locking block 12 to achieve positioning; the utility model integrates the self-locking block 12 on the first and second gear shift forks 5, making the structure more compact.

[0034] In a feasible implementation manner of the present invention, the third and fourth gear shift fork 6 is fixed to the third and fourth gear shift fork shaft 4 by elastic pins; the reverse gear shift fork 7 and guide block 9 are respectively fixed to the first and second gear shift fork shaft 3 by elastic pins; the elastic pins have good elasticity and shear resistance and are easy to disassemble.

[0035] In a feasible implementation of the utility model, the first and second gear shift forks 5 and the third and fourth gear shift forks 6 are made of aluminum alloy, so that the overall weight is reduced. The first and second gear guide blocks 10, the self-locking block 12 and the third and fourth gear guide blocks 11 are all made of steel.

[0036] The working process of the utility model is as follows:

[0037] When the driver pushes the shift handle to the 1st gear, the 1st and 2nd gear shift fork 5 moves backward under the action of the shift force. Since the 1st and 2nd gear shift fork shaft 3 is not completely fixed to the 1st and 2nd gear shift fork 5, the 1st and 2nd gear shift fork 5 can move backward without the reverse gear shift fork 7 moving, and the gear is shifted to the 1st gear. The 2nd gear shift process is the same, and the 1st and 2nd gear shift fork 5 moves forward.

[0038] When the driver pushes the shift handle to the 3rd gear, the 3rd and 4th gear shift fork 6 moves forward under the action of the shift force. Since it is completely fixed with the 3rd and 4th gear shift fork shaft 4, the 3rd and 4th gear shift fork 6 and the 3rd and 4th gear shift fork shaft 4 move forward at the same time, and the gear is shifted to the 3rd gear. The 4th gear shift process is the same, and the 3rd and 4th gear shift fork 6 and the 3rd and 4th gear shift fork shaft 4 move backward at the same time.

[0039] When the driver pushes the shift handle to the R gear, the reverse gear guide block 9 moves backward under the action of the shift force, and because it is completely fixed with the first and second gear shift fork shaft 3, the first and second gear shift fork shaft 3 and the reverse gear guide block 9 move backward at the same time, and the reverse gear shift fork 7 moves backward at the same time with the first and second gear shift fork shaft 3. Shift the gear to the R gear.

[0040] The above 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 be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double fork shaft transmission shift actuator, characterized in that: The invention comprises a first and second gear shift fork shaft (3) and a third and fourth gear shift fork shaft (4) which are arranged on a clutch housing (1) and a transmission housing (2); a third and fourth gear shift fork (6) is sleeved on the third and fourth gear shift fork shaft (4); a reverse gear shift fork (7), a first and second gear shift fork (5) and a reverse gear guide block (9) are sleeved on the first and second gear shift fork shaft (3) in sequence; the reverse gear shift fork (7) is arranged away from the clutch housing (1), and the guide block (9) is located between the first and second gear shift fork (5) and the third and fourth gear shift fork (6).

2. A double fork shaft transmission shift actuator according to claim 1, characterized in that: One side of the first and second gear shift fork (5) is connected to a first and second gear guide block (10); one side of the third and fourth gear shift fork (6) is connected to a third and fourth gear guide block (11); the first and second gear guide block (10) and the third and fourth gear guide block (11) are both located between the first and second gear shift fork (5) and the third and fourth gear shift fork (6).

3. A double fork shaft transmission shift actuator according to claim 2, characterized in that: The first and second gear shift fork (5) is die-cast as one piece with the first and second gear guide block (10) during die-casting.

4. A double fork shaft transmission shift actuator according to claim 2, characterized in that: The third and fourth gear shift fork (6) is die-cast as one piece with the third and fourth gear guide block (11).

5. The double fork shaft transmission shift actuator according to claim 1, characterized in that: An integrated self-locking block (12) is provided on the first and second gear shift forks (5); the self-locking block (12) is used to cooperate with the first and second gear self-locking column pins (8) to achieve self-locking of the gear positions.

6. A double fork shaft transmission shift actuator according to claim 5, characterized in that: The self-locking block (12) has a tooth-shaped structure.

7. The double fork shaft transmission shift actuator according to claim 1, characterized in that: The third and fourth gear shift forks (6) are fixed on the third and fourth gear shift fork shafts (4) via elastic pins; the reverse gear shift forks (7) and guide blocks (9) are respectively fixed on the first and second gear shift fork shafts (3) via elastic pins.

8. A double fork shaft transmission shift actuator according to any one of claims 1 to 7, characterized in that: The first and second gear shift fork (5) body is made of aluminum alloy material, and the first and second gear guide blocks (10) and the self-locking block (12) are made of steel.

9. The double fork shaft transmission shift actuator according to claim 8, characterized in that: The third and fourth gear shift fork (6) body is made of aluminum alloy material, and the third and fourth gear guide block (11) is made of steel.

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