Pneumatic transfer case assembly

Abstract

The utility model discloses a pneumatic transfer case assembly which comprises a shell, a cover plate, an input shaft lever body, an output shaft lever body, a front driving shaft lever body, a rear driving shaft lever body, a gear shifting structure and a front driving control structure. The gear shifting structure is optimally arranged, the interior of the gear shifting structure is meshed with the high-speed gear when the transmission inner tooth poking piece is located on the left side, and the interior of the gear shifting structure is meshed with the low-speed gear when the transmission inner tooth poking piece is located on the right side, so that high-speed and low-speed actions of the rotating shaft and the driving gear are achieved through movement of the transmission inner tooth poking piece. Therefore, a high gear or a low gear is formed to transmit acting force to the output shaft rod body, the rear driving shaft rod body is made to act through the output shaft rod body, the front driving shaft rod body and the output shaft rod body are connected or disconnected under the action of the front driving control structure, and then the four-wheel-drive or two-wheel-drive function is achieved in a combined mode. And all the components form a compact integral structure, so that the space is saved, and the integration level of the integral system is improved.

Description

Technical Field

[0001] This utility model relates to the field of transfer case technology, specifically a pneumatic transfer case assembly. Background Technology

[0002] Agricultural vehicles have been widely adopted and promoted in rural areas, effectively liberating labor, improving production efficiency, and accelerating agricultural modernization. In the past, agricultural vehicles were mainly low-powered and had small load capacities, so many of their structures were relatively simple to save costs.

[0003] Currently, Chinese patent application number CN201420517824.1 discloses the EQ245-2 pneumatic transfer case, which includes a housing and an input gear shaft, an intermediate gear shaft and an intermediate constant mesh gear on the housing, a front drive output shaft and a high speed gear and a front drive release sleeve on the shaft, a rear drive output shaft and a low speed gear and a sliding gear sleeve on the shaft. The rear drive output shaft is provided with a high and low gear shift fork, which is fixed to the high and low gear shift fork shaft by a shift fork stop bolt. One end of the high and low gear shift fork shaft is fixed to the high and low gear shift fork shaft support, and the other end is connected to the high and low gear cylinder. The front drive output shaft is provided with a front drive shift fork, which is fixed to the front drive shift shaft by bolts. The front drive shift shaft is mounted on the front drive cylinder sleeve by a piston disc and is fastened by bolts.

[0004] However, in the use of existing pneumatic transfer cases, the high and low speed adjustment ends are usually directly connected to the output shaft, which makes it inconvenient to perform transition shifts, easily causes the bearings to lack lubrication, and the structure is relatively non-compact, requiring a large space, and the overall system integration is relatively poor. Utility Model Content

[0005] The purpose of this utility model is to provide a pneumatic transfer case assembly to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a pneumatic transfer case assembly, comprising a housing, a cover plate, an input shaft main body, an output shaft main body, a front drive shaft main body, a rear drive shaft main body, a shifting structure, and a front drive control structure. The cover plate is tightly fitted to the side of the housing. The input shaft main body is penetrated through the upper left side of the housing interior, and the output shaft main body is penetrated through the bottom side of the housing interior. The front drive shaft main body and the rear drive shaft main body are respectively located at the left and right ends of the output shaft main body, and are respectively located at the bottom of the left and right sides of the housing. A shifting structure is located in the middle of the housing interior. The front drive shaft main body is connected to the output shaft via the front drive control structure. The main body is connected, and the shifting structure is connected to the input shaft body and output shaft body on the left and right sides of the housing respectively on the upper and lower sides. The shifting structure includes a rotating shaft connected to the left and right sides of the housing respectively on the left and right sides, a high-speed gear, a bushing, a low-speed gear and a drive gear arranged from left to right on the outer surface of the rotating shaft, and a transmission internal gear paddle that slides on the outer surface of the bushing. The bushing and the drive gear rotate coaxially with the rotating shaft. The top sides of the high-speed gear and the low-speed gear are connected to the input shaft body, and the bottom side of the drive gear is connected to the output shaft body. When the transmission internal gear paddle is on the left side, it meshes with the high-speed gear. When the transmission internal gear paddle is on the right side, it meshes with the low-speed gear.

[0007] Preferably, a high / low gear cylinder is provided on the upper left side of the front part of the housing, and a shift fork rod frame that penetrates through the front side wall of the housing is connected to the output end of the high / low gear cylinder on the right side. The top side of the shift fork rod frame is connected to the internal gear shift plate of the transmission.

[0008] Preferably, the inner sides of both the high-speed gear and the low-speed gear are rotatably connected to the shaft.

[0009] Preferably, a large gear and a small gear are respectively provided on the left and right sides of the outer surface of the input shaft body. The bottom of the large gear meshes with the high-speed gear, and the bottom of the small gear meshes with the low-speed gear.

[0010] Preferably, a driven gear is provided on the right side of the outer surface of the output shaft body, and the top side of the driven gear meshes with the drive gear.

[0011] Preferably, the outer surface of the bushing is provided with protruding teeth, and the protruding teeth mesh with the inner side of the transmission internal gear pawl.

[0012] Preferably, a spring is provided inside the bushing, and a steel ball is connected to the bottom end of the spring, with the side of the steel ball away from the spring contacting the transmission internal gear pawl.

[0013] Preferably, the front drive control structure includes a front drive cylinder disposed at the bottom left side of the housing, a shift fork connected to the right output end of the front drive cylinder, and an internal gear disposed on the top side of the shift fork. The internal gear is slidably disposed on the left side of the outer surface of the output shaft body, and the right side of the internal gear meshes with the output shaft body for transmission. When the internal gear is located on the left side, the left side of the internal gear meshes with the front drive shaft body for transmission.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model optimizes the shifting structure by integrating a high-speed gear, a bushing, a low-speed gear, and a drive gear from left to right on the outer surface of the shaft. A transmission internal gear paddle is located on the outer surface of the bushing. When the transmission internal gear paddle is on the left, it meshes with the high-speed gear; when it is on the right, it meshes with the low-speed gear. The movement of the transmission internal gear paddle allows for high-speed and low-speed operation of the shaft and drive gear. The shifting structure facilitates transitional gear changes, reducing the risk of insufficient lubrication in the bearings. This allows for the transmission of force to the output shaft body, which in turn drives the rear drive shaft body. Furthermore, the front drive control structure connects or disconnects the front drive shaft body from the output shaft body, enabling four-wheel drive or two-wheel drive functionality. All components form a compact integrated structure, saving space and improving the overall system integration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the shifting structure of this utility model.

[0018] In the diagram: Housing-1, Cover plate-2, Input shaft main body-3, Output shaft main body-4, Front drive shaft main body-5, Rear drive shaft main body-6, Shifting structure-7, Front drive control structure-8, Rotating shaft-71, High-speed gear-72, Bushing-73, Low-speed gear-74, Drive gear-75, Internal transmission gear pawl-76, Front drive cylinder-81, Shift fork-82, Internal gear-83, Spring-731, Steel ball-732. Detailed Implementation

[0019] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0020] Please see Figure 1 and Figure 2This utility model provides a pneumatic transfer case assembly, including a housing 1, a cover plate 2, an input shaft main body 3, an output shaft main body 4, a front drive shaft main body 5, a rear drive shaft main body 6, a shifting structure 7, and a front drive control structure 8. The cover plate 2 is tightly attached to the side of the housing 1. The input shaft main body 3 is provided through the upper left side of the interior of the housing 1, and the output shaft main body 4 is provided through the bottom side of the interior of the housing 1. The front drive shaft main body 5 and the rear drive shaft main body 6 are respectively provided at the left and right ends of the output shaft main body 4, and the front drive shaft main body 5 and the rear drive shaft main body 6 are respectively provided at the bottom of the left and right sides of the housing 1. The shifting structure 7 is provided in the middle of the interior of the housing 1. The front drive shaft main body 5 is connected to the output shaft main body 4 through the front drive control structure 8. The upper and lower sides of the shifting structure 7 are respectively connected to the input shaft main body 3 and the output shaft main body 4 on the left and right sides of the interior of the housing 1.

[0021] With the cooperation of the input shaft body 3 and the shifting structure 7, a high gear or a low gear can be formed to transmit the force to the output shaft body 4, thereby causing the rear drive shaft body 6 to move through the output shaft body 4. Under the action of the front drive control structure 8, the front drive shaft body 5 is connected or disconnected from the output shaft body 4, thus realizing four-wheel drive or two-wheel drive functions. Moreover, the various components form a compact overall structure, saving space and improving the integration of the overall system.

[0022] The shifting structure 7 includes a rotating shaft 71 connected to the left and right sides of the housing 1, a high-speed gear 72, a bushing 73, a low-speed gear 74 and a drive gear 75 arranged from left to right on the outer surface of the rotating shaft 71, and a transmission internal gear paddle 76 that slides on the outer surface of the bushing 73. The bushing 73 and the drive gear 75 rotate coaxially with the rotating shaft 71. The top sides of the high-speed gear 72 and the low-speed gear 74 are connected to the input shaft body 3, and the bottom side of the drive gear 75 is connected to the output shaft body 4. When the transmission internal gear paddle 76 is on the left side, it meshes with the high-speed gear 72. When the transmission internal gear paddle 76 is on the right side, it meshes with the low-speed gear 74. The high and low speed movements of the rotating shaft 71 and the drive gear 75 are realized by the movement of the position of the transmission internal gear paddle 76.

[0023] The housing 1 has a high / low gear cylinder on its upper left front side, and a shift fork bracket connected to the right output end of the high / low gear cylinder, which runs through the front side wall of the housing 1. The top of the shift fork bracket is connected to the internal gear pawl 76, so that the position of the internal gear pawl 76 can be changed by the high / low gear cylinder. The inner sides of the high-speed gear 72 and the low-speed gear 74 are rotatably connected to the rotating shaft 71. The input shaft body 3 has a large gear and a small gear on its left and right sides, respectively. The bottom of the large gear meshes with the high-speed gear 72, and the bottom of the small gear meshes with the low-speed gear 74. The output shaft body 4 has a large gear and a small gear on its outer surface. A driven gear is provided on the right side of the bushing 73, and the top side of the driven gear meshes with the drive gear 75. The outer surface of the bushing 73 is provided with protruding teeth, and the protruding teeth mesh with the inner side of the transmission internal gear pawl 76, so that the transmission internal gear pawl 76 can drive the bushing 73 to move when it rotates. A spring 731 is provided inside the bushing 73, and a steel ball 732 is connected to the bottom end of the spring 731. The side of the steel ball 732 away from the spring 731 contacts the transmission internal gear pawl 76, which plays a limiting role and ensures the stability of the transmission internal gear pawl 76 after it moves, thus ensuring the dynamic balance effect to a certain extent.

[0024] The front drive control structure 8 includes a front drive cylinder 81 located at the bottom left side of the housing 1, a shift fork 82 connected to the output end of the front drive cylinder 81 on the right side, and an internal gear 83 located on the top side of the shift fork 82. The internal gear 83 is slidably located on the left side of the outer surface of the output shaft body 4, and the right side of the internal gear 83 meshes with the output shaft body 4 for transmission. When the internal gear 83 is located on the left side, the left side of the internal gear 83 meshes with the front drive shaft body 5 for transmission. The lateral position of the internal gear 83 is controlled by the front drive cylinder 81 to achieve four-wheel drive or two-wheel drive function.

[0025] During operation, the input shaft body 3 rotates to drive the high-speed gear 72 and low-speed gear 74 respectively. The high and low gear cylinders actuate to change the position of the transmission internal gear paddle 76 on the surface of the bushing 73. When the transmission internal gear paddle 76 is on the left side, it meshes with the high-speed gear 72 to achieve high-speed operation of the rotating shaft 71 and the drive gear 75. The meshing between the drive gear 75 and the driven gear on the outer surface of the output shaft body 4 drives the rear drive shaft body 4. The body 6 or the front drive shaft body 5 and the rear drive shaft body 6 can move to achieve high-speed two-wheel drive or four-wheel drive functions; when the transmission internal gear paddle 76 is on the right side, it meshes with the low-speed gear 74 to achieve low-speed movement of the shaft 71 and the drive gear 75, and through the meshing between the drive gear 75 and the driven gear on the outer surface of the output shaft body 4, the output shaft body 4 drives the rear drive shaft body 6 or the front drive shaft body 5 and the rear drive shaft body 6 to move to achieve low-speed two-wheel drive or four-wheel drive functions.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic transfer case assembly, comprising a housing (1), a cover plate (2) tightly fitted to the side of the housing (1), an input shaft body (3) penetrating through the upper left side of the interior of the housing (1), and an output shaft body (4) penetrating through the bottom side of the interior of the housing (1), a front drive shaft body (5) and a rear drive shaft body (6) respectively provided at the left and right ends of the output shaft body (4), and the front drive shaft body (5) and the rear drive shaft body (6) respectively provided at the bottom of the left and right sides of the housing (1), characterized in that: It also includes a shifting structure (7) disposed in the middle of the housing (1). The front drive shaft body (5) is connected to the output shaft body (4) through the front drive control structure (8). The shifting structure (7) is connected to the input shaft body (3) and the output shaft body (4) on the left and right sides of the housing (1) respectively on its upper and lower sides. The shifting structure (7) includes a rotating shaft (71) connected to the left and right sides of the housing (1) respectively on its left and right sides, a high-speed gear (72), a bushing (73), and a low-speed gear (74) arranged from left to right on the outer surface of the rotating shaft (71). The drive gear (75) and the internal gear paddle (76) that slides on the outer surface of the bushing (73) are coaxially rotating with the shaft (71). The top sides of the high-speed gear (72) and the low-speed gear (74) are connected to the input shaft body (3). The bottom side of the drive gear (75) is connected to the output shaft body (4). When the internal gear paddle (76) is on the left side, it meshes with the high-speed gear (72). When the internal gear paddle (76) is on the right side, it meshes with the low-speed gear (74).

2. The pneumatic transfer case assembly according to claim 1, characterized in that: A high-low gear cylinder is provided on the upper left side of the front part of the housing (1), and a shift fork rod frame is connected to the right output end of the high-low gear cylinder through the front side wall of the housing (1). The top side of the shift fork rod frame is connected to the transmission internal gear pawl (76).

3. The pneumatic transfer case assembly according to claim 1, characterized in that: The inner sides of both the high-speed gear (72) and the low-speed gear (74) are rotatably connected to the rotating shaft (71).

4. The pneumatic transfer case assembly according to claim 1, characterized in that: The input shaft body (3) has a large gear and a small gear on its left and right sides respectively. The bottom of the large gear meshes with the high-speed gear (72), and the bottom of the small gear meshes with the low-speed gear (74).

5. The pneumatic transfer case assembly according to claim 1, characterized in that: A driven gear is provided on the right side of the outer surface of the output shaft body (4), and the top side of the driven gear meshes with the drive gear (75).

6. The pneumatic transfer case assembly according to claim 1, characterized in that: The outer surface of the bushing (73) is provided with protruding teeth, and the protruding teeth mesh with the inner side of the transmission inner toothed pawl (76).

7. The pneumatic transfer case assembly according to claim 1, characterized in that: The bushing (73) is provided with a spring (731) inside. A steel ball (732) is connected to the bottom end of the spring (731), and the side of the steel ball (732) away from the spring (731) is in contact with the transmission internal gear pawl (76).

8. The pneumatic transfer case assembly according to claim 1, characterized in that: The front drive control structure (8) includes a front drive cylinder (81) located at the bottom left side of the housing (1), a shift fork (82) connected to the output end of the front drive cylinder (81) on the right side, and an internal gear (83) located on the top side of the shift fork (82). The internal gear (83) is slidably located on the left side of the outer surface of the output shaft body (4), and the right side of the internal gear (83) meshes with the output shaft body (4). When the internal gear (83) is located on the left side, the left side of the internal gear (83) meshes with the front drive shaft body (5).

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