Pneumatic gear shifting assembly with differential lock mechanism

Abstract

The utility model discloses a pneumatic gear shifting assembly with a differential lock mechanism, which relates to the technical field of automobile parts, and comprises a differential lock component and a gear shifting component, the differential lock component realizes the fixation and release of a connecting column through a bolt, a pin hole, a reset spring, an adjusting plate and the like; the gear shifting assembly completes gear shifting operation through a connecting plate and a shifting fork piece, when an automobile runs at a high speed, a plug pin is inserted into a pin hole to fix a connecting column, mistaken starting of a differential lock is prevented, driving safety is guaranteed, when the automobile is shifted to a low-speed gear or a neutral gear, the plug pin is separated from the pin hole, the differential lock can be started, and mistaken engaging of a high-speed gear can be prevented after starting; the logic relation between the differential lock and gear shifting is optimized, damage to a vehicle transmission system is reduced, and the vehicle driving safety and reliability are improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and in particular relates to a pneumatic shift assembly with a differential lock mechanism. Background Technology

[0002] In today's ever-evolving automotive industry, vehicle performance and safety are receiving increasing attention. Differential locks and shift systems, as crucial components of the vehicle's transmission system, directly impact a vehicle's driving stability, handling, and safety. Differential locks rigidly connect the left and right half-shafts in special road conditions, such as mud, snow, and sand, allowing both wheels to rotate synchronously and enhancing the vehicle's traction. The shift system, on the other hand, is responsible for switching between different gear sets to meet the vehicle's power demands under varying driving conditions.

[0003] Existing pneumatic shift assemblies have some defects in design and practical application. The linkage mechanism between the differential lock and the shift operation is not perfect. During vehicle operation, especially at high speed, if the driver accidentally touches the differential lock activation button, causing the differential lock to activate unexpectedly, the left and right half shafts of the vehicle will suddenly be rigidly connected, causing the wheels on both sides to rotate synchronously. At high speeds, this can easily lead to loss of vehicle control and seriously threaten the lives of the driver and passengers. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic shift assembly with a differential lock mechanism, which solves the problem that existing pneumatic shift assemblies malfunction due to errors in the differential lock activation button during shifting, leading to vehicle damage.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a pneumatic shift assembly with a differential lock mechanism, including a differential lock assembly and a shift assembly. The differential lock assembly includes a housing, a connecting post that slides inside the housing, a groove on the periphery of the connecting post, and a pin hole communicating with the groove on the periphery of the connecting post.

[0007] A pin is slidably fitted through the periphery of the outer shell. The pin is inserted into a pin hole. A limit ring is fixedly connected to the periphery of the pin. A first return spring is sleeved on the periphery of the pin between the limit ring and the outer shell.

[0008] The present invention is further configured such that the shifting assembly includes a connecting plate, a connecting rod is fixedly connected to one end of the connecting plate, an adjusting plate is fixedly connected to one end of the connecting rod, the adjusting plate is slidably engaged with a pin, and a first guide rod is slidably engaged through the interior of the adjusting plate.

[0009] The present invention is further configured such that the contour surface of the adjustment plate that contacts the pin is Z-shaped.

[0010] The present invention is further configured such that a fork is fixedly installed on the periphery of the connecting column and on one side of the connecting plate, and a second guide rod is slidably fitted through the fork.

[0011] The present invention is further configured such that a first cylinder is fixedly connected to one end of the connecting column, a bushing is fixedly connected to the other end of the connecting column, and a second return spring is installed between one end of the bushing and the inner wall of the outer casing.

[0012] The present invention is further configured such that a second cylinder is fixedly connected to the other side of the connecting plate.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model, when the car is in high gear, inserts the pin into the pin hole, and the connecting column and the connected shift fork are fixed, so that the differential lock cannot be activated, preventing the differential lock from accidentally activating and causing dangers such as loss of vehicle control, thus providing strong protection for the life safety of the driver and passengers.

[0015] 2. This utility model ensures that the differential lock operates under appropriate conditions by setting the first return spring to disengage the pin from the pin hole when the car is engaged in low gear or neutral, thus activating the differential lock. Furthermore, after the differential lock is activated, the pin is pressed against the inner wall of the slide groove to prevent the vehicle from accidentally engaging a high gear. This also avoids damage to the vehicle caused by improper use of the differential lock.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a pneumatic shifting assembly with a differential lock mechanism;

[0019] Figure 2 This is a cross-sectional view of the differential lock assembly in its non-operating state.

[0020] Figure 3 A schematic diagram of the differential lock assembly after removing the outer casing.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Differential lock assembly; 2. Shift assembly; 3. Housing; 4. Connecting post; 5. Slide groove; 6. Pin hole; 7. Pin; 8. Limiting ring; 9. First return spring; 10. Connecting plate; 11. Connecting rod; 12. Adjusting plate; 13. Shift fork; 14. First guide rod; 15. Second guide rod; 16. First cylinder; 17. Bushing; 18. Second return spring; 19. Second cylinder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation

[0025] Please see Figure 1-3 This utility model is a pneumatic shift assembly with a differential lock mechanism, including a differential lock assembly 1 and a shift assembly 2.

[0026] The differential lock assembly 1 includes a housing 3, with a connecting post 4 slidably fitted inside the housing 3. A groove 5 is formed on the periphery of the connecting post 4, and a pin hole 6 communicating with the groove 5 is formed on the periphery of the connecting post 4. A pin 7 is slidably fitted through the periphery of the housing 3, and the pin 7 is inserted into the pin hole 6. A limit ring 8 is fixedly connected to the periphery of the pin 7. A first return spring 9 is sleeved on the periphery of the pin 7, located between the limit ring 8 and the housing 3. A shift fork 13 is fixedly installed on the periphery of the connecting post 4. By applying pressure to the pin 7, the pin 7 passes through the groove 5 and inserts into the pin hole 6. Simultaneously, the limit ring 8 compresses the first return spring 9, thus fixing the connecting post 4 and preventing it from moving relative to the housing 3. Consequently, the shift fork 13 connected to the connecting post 4 is also fixed. At this time, the shift fork 13 cannot push the locking sleeve to engage with the dog teeth on the differential housing, and the differential lock cannot be activated. For example, when the car is in high gear, the pin 7 is inserted into the pin hole 6. Even if the driver accidentally touches the control key, the connecting column 4 cannot be pushed, and the differential lock cannot be activated, thus avoiding dangerous situations.

[0027] Specifically, the shift assembly 2 includes a connecting plate 10, with a connecting rod 11 fixedly connected to one end of the connecting plate 10 and an adjusting plate 12 fixedly connected to one end of the connecting rod 11. The adjusting plate 12 is slidably engaged with the pin 7, and a first guide rod 14 is slidably engaged through the inside of the adjusting plate 12. The contour surface of the adjusting plate 12 that contacts the pin 7 is Z-shaped (the figure shows a single Z-shaped contour surface as an example; the specific shape can be changed according to the moving distance of the shift fork 13 connected to the connecting plate 10 in different gear positions). By pushing the connecting plate 10 to one side, the connecting plate 10 drives the connecting rod 11 and the adjusting plate 12 to move together. Since the adjusting plate 12 is slidably engaged with the pin 7 and the contour surface is Z-shaped, during the movement of the adjusting plate 12, it will push the pin 7 to insert into or move away from the pin hole 6 according to its contour shape, thereby realizing the fixing and releasing operation of the connecting post 4.

[0028] A shift fork 13 is fixedly installed on one side of the connecting plate 10. A second guide rod 15 is slidably fitted through each shift fork 13. When the connecting plate 10 moves, the connecting plate 10 will drive the shift fork 13 connected to it to move in the same direction. The shift fork 13 pushes the synchronizer sleeve to slide axially. The friction cone surface of the synchronizer contacts the target gear, and the dog teeth of the sleeve mesh with the gear to use different transmission gear sets for meshing transmission, thereby adjusting different gear positions. The first guide rod 14 and the second guide rod 15 are both fixedly connected to the outer housing of this assembly mechanism to guide the movement of the two shift forks 13.

[0029] Furthermore, a first cylinder 16 is fixedly connected to one end of the connecting column 4, and a bushing 17 is fixedly connected to the other end of the connecting column 4. A second return spring 18 is installed between one end of the bushing 17 and the inner wall of the outer casing 3. A second cylinder 19 is fixedly connected to the other side of the connecting plate 10. The first cylinder 16 and the second cylinder 19 are both installed on the inner wall of the outer casing. The first cylinder 16 and the second cylinder 19 are both used as power sources to push the connecting column 4 and the connecting plate 10 to move, respectively.

[0030] The operation process of this embodiment is as follows: When the car starts shifting gears, the second cylinder 19 pushes the connecting plate 10 to move to one side. The connecting plate 10 drives the shift fork 13 connected to it to move in the same direction. The shift fork 13 pushes the synchronizer sleeve to slide axially, so that different transmission gear sets mesh and transmit power, thereby realizing the replacement between different gears. At the same time, when the connecting plate 10 moves, it will drive the connecting rod 11 and the adjusting plate 12 to move together. During the movement of the adjusting plate 12, it will push the pin 7 to insert into or move away from the pin hole 6 according to its contour shape, thereby realizing the fixing and releasing of the connecting column 4. Figure 1 , Figure 2 In the state shown, the second cylinder 19 has pushed the shift fork 13 connected to the connecting plate 10, so that the car is in a high gear. One end of the pin 7 has been inserted into the pin hole 6, the first return spring 9 is in a compressed state, the connecting column 4 is fixed, and the differential lock cannot be activated.

[0031] When the car is shifted into low gear or neutral, the second cylinder 19 drives the connecting plate 10 to move in the opposite direction. The pin 7 slides in the opposite direction along the Z-shaped contour surface of the adjusting plate 12. Under the rebound action of the first return spring 9, one end of the pin 7 gradually disengages from the pin hole 6 and enters the slide groove 5. Then, the differential lock start button can be pressed. The first cylinder 16 pushes the connecting column 4 to move to one side. The connecting column 4 pushes the shift fork 13 connected to it to move in the same direction. The shift fork 13 pushes the locking sleeve to engage with the dog teeth on the differential housing, thus... With the left and right half shafts rigidly connected, the differential lock is activated, and the wheels on both sides rotate synchronously. When the first cylinder 16 pushes the connecting column 4 to one side, the pin hole 6 and the pin 7 are no longer aligned. The connecting column 4 pushes the bushing 17 to compress the second return spring 18, and one end of the pin 7 abuts against the inner wall of the slide groove 5. Therefore, when the differential lock is in the activated state, the second cylinder 19 cannot push the adjusting plate 12 to one side a certain distance through the connecting plate 10 and the connecting rod 11, thereby preventing the car from accidentally engaging a high gear and further ensuring driving safety.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pneumatic shifting assembly with a differential lock mechanism, characterized in that: It includes a differential lock assembly (1) and a shift assembly (2). The differential lock assembly (1) includes a housing (3). A connecting post (4) is slidably fitted inside the housing (3). A groove (5) is provided on the peripheral side of the connecting post (4). A pin hole (6) communicating with the groove (5) is provided on the peripheral side of the connecting post (4). A pin (7) is slidably fitted through the periphery of the outer shell (3). The pin (7) is inserted into the pin hole (6). A limit ring (8) is fixedly connected to the periphery of the pin (7). A first return spring (9) is sleeved on the periphery of the pin (7) between the limit ring (8) and the outer shell (3).

2. The pneumatic shifting assembly with a differential lock mechanism according to claim 1, characterized in that, The shift assembly (2) includes a connecting plate (10), one end of which is fixedly connected to a connecting rod (11), and one end of which is fixedly connected to an adjusting plate (12). The adjusting plate (12) is slidably engaged with a pin (7), and a first guide rod (14) is slidably engaged inside the adjusting plate (12).

3. A pneumatic shifting assembly with a differential lock mechanism according to claim 2, characterized in that, The contour surface of the adjusting plate (12) that contacts the pin (7) is Z-shaped.

4. A pneumatic shifting assembly with a differential lock mechanism according to claim 3, characterized in that, The connecting column (4) and the connecting plate (10) are both fixedly installed with a fork (13), and a second guide rod (15) is slidably fitted through the fork (13).

5. A pneumatic shifting assembly with a differential lock mechanism according to claim 4, characterized in that, One end of the connecting column (4) is fixedly connected to a first cylinder (16), and the other end of the connecting column (4) is fixedly connected to a bushing (17). A second return spring (18) is installed between one end of the bushing (17) and the inner wall of the outer shell (3).

6. A pneumatic shifting assembly with a differential lock mechanism according to claim 5, characterized in that, A second cylinder (19) is fixedly connected to the other side of the connecting plate (10).

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