Clutch gearbox assembly and front and rear drive transfer case assembly

Abstract

The clutch gearbox assembly comprises a gearbox body, the gearbox body comprises a shell, a shaft cover is installed on the left side of the shell, a main shaft is installed in the middle of the shaft cover, the right side of the main shaft is in butt joint with an input spline sleeve, and the right side of the main shaft is in butt joint with the input spline sleeve. A reverse gear bushing is arranged outside the right end of the main shaft; the transmission case main body and the transfer case main body are connected together, so that the transmission case can be used for a vehicle with the axle distance smaller than 3 meters, horizontal transmission of a transmission shaft is guaranteed, dynamic balance of the transmission shaft during operation is avoided, and the problems that accessories of the transmission shaft, a transfer case assembly and a front axle are prone to being damaged are solved. Through cooperation of the shell, the gearbox, the transfer case, the input gear shaft, the front drive spline shaft, the rear drive shaft, the synchronizer, the sliding gear sleeve and other accessories, speed change and high-low gear switching can be flexibly achieved, power is reasonably distributed to a front axle and a rear axle, and the requirement for stable running of an automobile is met.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically to a clutch and gearbox assembly and a front and rear drive transfer case assembly. Background Technology

[0002] A gearbox is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio between the output shaft and the input shaft in a fixed or progressively increasing manner. A gearbox consists of a transmission mechanism and a control mechanism; some cars also have a power take-off (PTO) mechanism. Most transmission mechanisms use ordinary gear drives, while some use planetary gear drives. Ordinary gear transmission mechanisms typically use sliding gears and synchronizers.

[0003] A transfer case is a device that distributes engine power, allowing power to be sent to the rear axle or simultaneously to both the front and rear axles. From this perspective, the transfer case is essentially a component of a four-wheel drive vehicle.

[0004] The gearbox and transfer case are usually connected by a shaft. In this way, the power is transmitted to the drive shaft of the transfer case through the gearbox, and then the power is reasonably distributed to the front axle and the rear axle by the gear transmission system inside the transfer case, thus enabling four-wheel drive.

[0005] Currently, the transmission and transfer case are generally separate structures, and their application and installation range is generally vehicles with a wheelbase of 3.3 meters or more. When connected, the drive shaft has a large tilt angle and poor dynamic balance, which can easily have a certain impact on the vehicle's driving and internal components. Utility Model Content

[0006] The purpose of this utility model is to provide a clutch and gearbox assembly and a front and rear drive transfer case assembly to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, a clutch transmission assembly includes a transmission body, characterized in that the transmission body includes a housing, a shaft cover is installed on the left side of the housing, a main shaft is installed in the middle of the shaft cover, the right side of the main shaft is connected to an input spline sleeve, a reverse gear bushing is installed on the outside of the right end of the main shaft, a reverse gear driven gear is mated to the outside of the reverse gear bushing, a reverse gear fixing seat is installed on the left side of the reverse gear driven gear, and a first sliding tooth sleeve is installed on the outside of the reverse gear fixing seat, a first gear is provided on the left side of the reverse gear fixing seat, a second gear is provided on the left side of the first gear, a second and third gear synchronizer assembly is provided on the left side of the second gear, a third gear is provided on the left side of the second and third gear synchronizer assembly, a fourth gear is installed on the left side of the third gear, a fourth and fifth gear seat is provided on the left side of the fourth gear, and a fourth and fifth gear synchronizer assembly is provided on the outside of the fourth and fifth gear seat.

[0009] Preferably, the housing further includes a first intermediate shaft installed at the lower inner end. The middle right side of the first intermediate shaft is connected to a second deep groove bearing, and the second deep groove bearing is connected to the lower right end of the housing. The first intermediate shaft is equipped with a second intermediate gear, a third intermediate gear, a fourth intermediate gear, and a constant mesh gear in sequence from right to left. The sides of the second intermediate gear, the third intermediate gear, the fourth intermediate gear, and the constant mesh gear abut against each other in sequence. The left side of the first intermediate shaft is connected to a cylindrical roller bearing, and a plug is installed on the outside of the cylindrical roller bearing. The constant mesh gear meshes with the main shaft.

[0010] Preferably, the first gear, second gear, third gear and fourth gear are respectively equipped with a first needle roller bearing, a second needle roller bearing, a third needle roller bearing and a fourth needle roller bearing.

[0011] Preferably, both sides of the main shaft are connected to first deep groove bearings, and the first deep groove bearings on both sides are respectively connected to the two sides of the housing.

[0012] Secondly, this application also proposes a front and rear drive transfer case assembly, including a transfer case body, the transfer case body including a housing, the upper left side of the housing being connected to the outer shell, an input gear shaft being installed inside the upper end of the housing, and a fifth needle roller bearing being installed on the outer right side of the input gear shaft, a first input gear being mated to the outer side of the fifth needle roller bearing, the outer left end of the input gear shaft being connected to a third deep groove bearing, and the inner left side of the input gear shaft being connected to an input spline sleeve, a first shift fork assembly being installed on the top of the housing, the lower end of the first input gear meshing with a first intermediate gear, a sixth needle roller bearing being installed inside the first intermediate gear, and the sixth needle roller bearing being connected to the outer side of a second intermediate shaft, both sides of the second intermediate shaft being connected to first roller bearings, and a second intermediate gear being installed on the outer left side of the second intermediate shaft, the upper end of the second intermediate gear meshing with the input gear shaft, a front and rear drive assembly being provided in the middle of the housing, and the front and rear drive assembly meshing with the lower end of the first intermediate gear, and a second shift fork assembly being provided at the lower end of the housing.

[0013] Preferably, the first shift fork assembly includes a connecting shell installed on the top of the housing, the connecting shell being connected to the top of the housing, a high / low gear shift fork shaft being installed inside the connecting shell, the left side of the high / low gear shift fork shaft being connected to a first plug, a first spring steel ball being abutted against the outer side of the left side of the high / low gear shift fork shaft, a high / low gear shift fork being installed in the middle of the high / low gear shift fork shaft, the right side of the connecting shell being connected to a side cover plate, and a first cylinder body being installed outside the side cover plate, the first cylinder body being connected to the right side of the high / low gear shift fork shaft, and the lower end of the high / low gear shift fork shaft being connected to a second sliding tooth sleeve.

[0014] Preferably, the front and rear drive assembly includes a front drive spline shaft, which is mounted in the middle of the housing. A fourth deep groove bearing is connected to the outer left side of the front drive spline shaft, and a seventh needle roller bearing is provided on the outer right side of the front drive spline shaft. The outer end of the seventh needle roller bearing is connected to a second input gear, and the upper end of the second input gear meshes with a first intermediate gear. The right side of the front drive spline shaft is connected to the middle of a second roller bearing, and a fourth sliding tooth sleeve is installed in the middle of the front drive spline shaft. A rear drive gear is provided at the lower end of the second input gear, and a rear drive shaft is connected to the middle of the rear drive gear. Third roller bearings are installed on both outer sides of the rear drive shaft, and the right side of the rear drive shaft is connected to the odometer drive gear. An inner odometer mount is installed on the outer side of the odometer drive gear.

[0015] Preferably, the second shift fork assembly includes a front drive shift fork shaft, which is installed at the lower end of the housing. The left side of the front drive shift fork shaft is connected to the second plug. A second spring steel ball is abutted against the outside of the front drive shift fork shaft, and a front drive shift fork is installed in the middle of the front drive shift fork shaft. The right side of the front drive shift fork shaft is connected to the second cylinder block.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model connects the gearbox body and the transfer case body together, which can meet the needs of vehicles with a wheelbase of less than 3 meters. It ensures horizontal transmission of the drive shaft, avoids dynamic imbalance during drive shaft operation, and avoids problems such as damage to the drive shaft, transfer case assembly, and easily damaged parts of the front axle. At the same time, through the cooperation of accessories such as housing, gearbox, transfer case, input gear shaft, front drive spline shaft, rear drive shaft, synchronizer, and sliding gear sleeve, it can flexibly realize gear change and high and low gear switching, so as to rationally distribute power to the front and rear axles and meet the needs of stable driving of the vehicle. Attached Figure Description

[0018] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0019] Fig. 2 This is a schematic diagram of the internal structure of the main body of the gearbox of this utility model;

[0020] Fig. 3 This is a schematic diagram of the internal structure of the transfer case of this utility model;

[0021] Fig. 4 This is a schematic diagram of the internal structure of the first shift fork assembly of this utility model;

[0022] Fig. 5 This is a schematic diagram of the internal structure of the front and rear drive assembly of this utility model;

[0023] Fig. 6 This is a schematic diagram of the internal structure of the second shift fork assembly of this utility model.

[0024] In the diagram: Gearbox body-1, housing-11, shaft cover-12, main shaft-13, input spline sleeve-14, reverse gear bushing-15, reverse driven gear-16, reverse gear mounting seat-17, first sliding gear sleeve-18, first needle roller bearing-19, first gear-110, second needle roller bearing-111, second gear-112, second and third gear synchronizer assembly-113, third needle roller bearing-114, third gear-115, fourth needle roller bearing-116, fourth gear-117, fourth and fifth gears. Gear seat-118, Fourth and fifth gear synchronizer assembly-119, First deep groove bearing-120, First intermediate shaft-121, Second deep groove bearing-122, Intermediate second gear-123, Intermediate third gear-124, Intermediate fourth gear-125, Constant mesh gear-126, Cylindrical roller bearing-127, Plug-128, Transfer case body-2, Housing-21, Input gear shaft-22, Fifth needle roller bearing-23, First input gear-24, Third deep groove bearing-25, First shift fork assembly- 26. Connecting housing - 261. High / low gear shift fork shaft - 262. First plug - 263. First spring steel ball - 264. High / low gear shift fork - 265. Side cover plate - 266. First cylinder block - 267. Second sliding gear sleeve - 268. First intermediate gear - 27. Sixth needle roller bearing - 28. Second intermediate shaft - 29. Third sliding gear sleeve - 210. First roller bearing - 211. Second intermediate gear - 212. Front and rear drive assembly - 213. Front drive spline shaft - 2131. Fourth deep groove bearing - 21 32. Seventh needle roller bearing - 2133. Second input gear - 2134. Second roller bearing - 2135. Fourth sliding gear sleeve - 2136. Rear drive gear - 2137. Rear drive shaft - 2138. Third roller bearing - 2139. Odometer drive gear - 21310. Inner gauge mount - 21311. Second shift fork assembly - 214. Front drive shift fork shaft - 2141. Second plug - 2142. Second spring steel ball - 2143. Front drive shift fork - 2144. Second cylinder block - 2145. Detailed Implementation

[0025] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0026] Firstly, a clutch and transmission assembly, please refer to... Figs. 1-2The transmission includes a gearbox body 1, which includes a housing 11. A shaft cover 12 is mounted on the left side of the housing 11. A main shaft 13 is mounted in the middle of the shaft cover 12. The right side of the main shaft 13 is connected to the input spline sleeve 14, thereby enabling synchronous rotation of the input spline sleeve 14. A reverse gear bushing 15 is mounted on the outside of the right end of the main shaft 13. A reverse driven gear 16 is connected to the outside of the reverse gear bushing 15. A reverse gear fixing seat 17 is mounted on the left side of the reverse driven gear 16, and a first sliding tooth sleeve 18 is mounted on the outside of the reverse gear fixing seat 17. The sliding of sleeve 18 enables reverse gear switching to meet reversing activities. A first gear 110 is provided on the left side of the reverse gear fixing seat 17. A second gear 112 is provided on the left side of the first gear 110. A second and third gear synchronizer assembly 113 is provided on the left side of the second gear 112. A third gear 115 is provided on the left side of the second and third gear synchronizer assembly 113. A fourth gear 117 is installed on the left side of the third gear 115. A fourth and fifth gear seat 118 is provided on the left side of the fourth gear 117. A fourth and fifth gear synchronizer assembly 119 is provided outside the fourth and fifth gear seat 118.

[0027] The housing 11 also includes a first intermediate shaft 121 installed at the lower inner end. The middle right side of the first intermediate shaft 121 is connected to a second deep groove bearing 122, and the second deep groove bearing 122 is connected to the lower right end of the housing 11. The first intermediate shaft 121 is equipped with an intermediate second gear 123, an intermediate third gear 124, an intermediate fourth gear 125, and a constant mesh gear 126 in sequence from right to left. The intermediate second gear 123, intermediate third gear 124, intermediate fourth gear 125 and the constant mesh gear 126 abut against each other in sequence. At the same time, the upper ends of the intermediate second gear 123, intermediate third gear 124 and intermediate fourth gear 125 are respectively meshed with the second gear 112, the third gear 115 and the fourth gear 117. The left side of the first intermediate shaft 121 is connected to a cylindrical roller bearing 127, and a plug 128 is installed on the outside of the cylindrical roller bearing 127. The constant mesh gear 126 is meshed with the main shaft 13.

[0028] Among them, the first gear 110, the second gear 112, the third gear 115 and the fourth gear 117 are respectively equipped with a first needle roller bearing 19, a second needle roller bearing 111, a third needle roller bearing 114 and a fourth needle roller bearing 116, thereby ensuring the smooth rotation of the first gear 110, the second gear 112, the third gear 115 and the fourth gear 117.

[0029] The main shaft 13 is connected to the left and right sides of the first deep groove bearing 120, and the first deep groove bearing 120 on both sides is connected to the left and right sides of the housing 11 respectively. In this way, the main shaft 13 can be stably rotated and transmitted inside the housing 11.

[0030] Secondly, this application also proposes a front- and rear-drive transfer case assembly; please refer to [link / reference]. Figs. 3-6 The system includes a transfer case body 2, which includes a housing 21. The upper left side of the housing 21 is connected to the outer casing 11. An input gear shaft 22 is installed inside the upper end of the housing 21, and a fifth needle roller bearing 23 is installed on the outer right side of the input gear shaft 22. This allows for smooth rotation of the input gear shaft 22. A first input gear 24 is connected to the outer side of the fifth needle roller bearing 23. The outer left end of the input gear shaft 22 is connected to a third deep groove bearing 25, and the inner left side of the input gear shaft 22 is connected to an input spline sleeve 14. Thus, when the input spline sleeve 14 rotates, the input gear shaft 22 rotates synchronously. A first shift fork assembly 26 is installed on the top of the housing 21 for flexible adjustment. During the gear shifting adjustment, the lower end of the first input gear 24 meshes with the first intermediate gear 27. The first intermediate gear 27 is equipped with a sixth needle roller bearing 28, which is connected to the outside of the second intermediate shaft 29. The left and right sides of the second intermediate shaft 29 are connected to the first roller bearing 211, and the left side of the second intermediate shaft 29 is equipped with a second intermediate gear 212. The upper end of the second intermediate gear 212 meshes with the input gear shaft 22. The front and rear drive assemblies 213 are provided in the middle of the housing 21, and the front and rear drive assemblies 213 mesh with the lower end of the first intermediate gear 27. In this way, flexible transmission and coordination between four-wheel drive and two-wheel drive modes can be achieved. The lower end of the housing 21 is equipped with a second shift fork assembly 214.

[0031] The first shift fork assembly 26 includes a connecting shell 261 installed on the top of the housing 21. The connecting shell 261 is connected to the top of the housing 21. The connecting shell 261 is equipped with a high / low gear shift fork shaft 262. The left side of the high / low gear shift fork shaft 262 is connected to a first plug 263. A first spring steel ball 264 abuts against the outside of the left side of the high / low gear shift fork shaft 262. A high / low gear shift fork 265 is installed in the middle of the high / low gear shift fork shaft 262. The right side of the connecting shell 261 is connected to a side cover plate 266. A first cylinder body 267 is installed outside the side cover plate 266. The first cylinder body 267 is connected to the right side of the high / low gear shift fork shaft 262. The lower end of the high / low gear shift fork shaft 262 is connected to a second sliding tooth sleeve 268.

[0032] The front-wheel drive assembly 213 includes a front-wheel drive spline shaft 2131, which is mounted in the middle of the housing 21. A fourth deep groove bearing 2132 is connected to the outer left side of the front-wheel drive spline shaft 2131, and a seventh needle roller bearing 2133 is provided on the outer right side of the front-wheel drive spline shaft 2131. The outer end of the seventh needle roller bearing 2133 is connected to a second input gear 2134, and the upper end of the second input gear 2134 meshes with a first intermediate gear 27. The right side of the front-wheel drive spline shaft 2131 is connected to a second roller shaft. The front drive spline shaft 2131 is connected to the middle of the bearing 2135, and the middle of the front drive spline shaft 2131 is equipped with a fourth sliding gear sleeve 2136. The lower end of the second input gear 2134 is equipped with a rear drive gear 2137, and the middle of the rear drive gear 2137 is connected to the rear drive shaft 2138. The outer sides of the rear drive shaft 2138 are equipped with third roller bearings 2139, and the right side of the rear drive shaft 2138 is connected to the odometer drive gear 21310. The outer side of the odometer drive gear 21310 is equipped with an inner meter seat 21311.

[0033] The second shift fork assembly 214 includes a front drive shift fork shaft 2141, which is installed at the lower end of the housing 21. The left side of the front drive shift fork shaft 2141 is connected to the second plug 2142. The front drive shift fork shaft 2141 is abutted against the outside of the second spring steel ball 2143. The front drive shift fork shaft 2141 is equipped with a front drive shift fork 2144 in the middle. The right side of the front drive shift fork shaft 2141 is connected to the second cylinder block 2145.

[0034] The working principle is as follows:

[0035] When the main shaft 13 rotates with the external input shaft, the positions of the second and third gear synchronizer assemblies 113 and the fourth and fifth gear synchronizer assemblies 119 are adjusted accordingly to realize the transmission between the constant mesh gear 126 and the main shaft 13, the transmission between the second gear 112 and the intermediate second gear 123, the transmission between the third gear 115 and the intermediate third gear 124, and the transmission between the fourth gear 117 and the intermediate fourth gear 125. In this way, the gear shifting and speed change activities are realized. If reverse gear activity is required, the first sliding tooth sleeve 18 installed on the outside of the reverse gear fixing seat 17 can be moved to realize the rotation of the reverse gear driven gear 16. In this way, the main shaft 13 can be rotated in the opposite direction to meet the reverse gear activity of the car.

[0036] Simultaneously, when the main shaft 13 rotates, it can cooperate with the input spline sleeve 14 on the right side to realize the transmission of the input gear shaft 22. Furthermore, the second sliding gear sleeve 268, installed in the middle of the input gear shaft 22, is actuated by the first cylinder body 267, the high / low gear shift fork shaft 262, and the high / low gear shift fork 265, enabling left and right movement. Thus, through the input gear shaft 22, the first input gear 24, the first intermediate gear 27, the second intermediate shaft 29, the rear drive gear 2137, and the rear drive shaft 2138, rear drive output activity is achieved, realizing the state of high speed gear - disengaged front drive = rear drive. The second sliding gear sleeve 268 and the input gear shaft... When the left side of 22 is connected together, the third sliding sleeve 210 and the second intermediate gear 212 are connected together, and the fourth sliding sleeve 2136 and the second input gear 2134 are connected together. The input gear shaft 22, the second intermediate gear 212, the first intermediate gear 27, and the second intermediate shaft 29 are then divided into two transmission routes. One route is through the second input gear 2134 and the front drive spline shaft 2131, which will realize the front drive output activity. The other route is through the fourth sliding sleeve 2136, the rear drive gear 2137 and the rear drive shaft 2138 for output. In this way, four-wheel drive activity can be realized, that is, the realization of low speed gear + front drive = four-wheel drive state.

[0037] Thus, by connecting the aforementioned gearbox body 1 and transfer case body 2 together, it can meet the needs of vehicles with a wheelbase of less than 3 meters, such as mining vehicles. Therefore, it is necessary to shorten the length of the gearbox and transfer case to ensure horizontal transmission of the drive shaft, avoid dynamic imbalance during drive shaft operation, and prevent problems such as damage to the drive shaft, transfer case assembly, and easily damaged parts of the front axle.

[0038] 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 clutch-transmission assembly, comprising a transmission body (1), characterized in that, The gearbox body (1) includes a housing (11), a shaft cover (12) is installed on the left side of the housing (11), a main shaft (13) is installed in the middle of the shaft cover (12), the right side of the main shaft (13) is connected to the input spline sleeve (14), a reverse gear bushing (15) is installed on the outside of the right end of the main shaft (13), a reverse driven gear (16) is connected to the outside of the reverse gear bushing (15), a reverse gear fixing seat (17) is installed on the left side of the reverse driven gear (16), and a first sliding tooth sleeve (18) is installed on the outside of the reverse gear fixing seat (17). A first gear (110) is provided on the left side of the gear fixing seat (17). A second gear (112) is provided on the left side of the first gear (110). A second and third gear synchronizer assembly (113) is provided on the left side of the second gear (112). A third gear (115) is provided on the left side of the second and third gear synchronizer assembly (113). A fourth gear (117) is installed on the left side of the third gear (115). A fourth and fifth gear seat (118) is provided on the left side of the fourth gear (117). A fourth and fifth gear synchronizer assembly (119) is provided outside the fourth and fifth gear seat (118).

2. The clutch and gearbox assembly according to claim 1, characterized in that: The housing (11) also includes a first intermediate shaft (121) installed at the lower inner end. The middle right side of the first intermediate shaft (121) is connected to a second deep groove bearing (122), and the second deep groove bearing (122) is connected to the lower right end of the housing (11). The first intermediate shaft (121) is equipped with an intermediate second gear (123), an intermediate third gear (124), an intermediate fourth gear (125), and a constant mesh gear (126) from right to left. The intermediate second gear (123), intermediate third gear (124), intermediate fourth gear (125), and constant mesh gear (126) abut against each other on their sides. The left side of the first intermediate shaft (121) is connected to a cylindrical roller bearing (127), and a plug (128) is installed on the outside of the cylindrical roller bearing (127). The constant mesh gear (126) meshes with the main shaft (13).

3. The clutch and gearbox assembly according to claim 1, characterized in that: The first gear (110), second gear (112), third gear (115) and fourth gear (117) are respectively equipped with a first needle roller bearing (19), a second needle roller bearing (111), a third needle roller bearing (114) and a fourth needle roller bearing (116).

4. The clutch and gearbox assembly according to claim 1, characterized in that: The main shaft (13) is connected to the first deep groove bearing (120) on both sides, and the first deep groove bearing (120) on both sides is connected to the two sides of the housing (11).

5. A front- and rear-drive transfer case assembly, comprising a clutch gearbox assembly according to any one of claims 1-4, characterized in that, The transfer case includes a main body (2), which includes a housing (21). The upper left side of the housing (21) is connected to the housing (11). An input gear shaft (22) is installed inside the upper end of the housing (21), and a fifth needle roller bearing (23) is installed on the outer side of the right side of the input gear shaft (22). A first input gear (24) is connected to the outer side of the fifth needle roller bearing (23). The outer side of the input gear shaft (22) is connected to a third deep groove bearing (25), and the inner side of the input gear shaft (22) is connected to an input spline sleeve (14). A first shift fork assembly (26) is installed on the top of the housing (21), and the lower end of the first input gear (24) is connected to... The first intermediate gear (27) meshes with the first intermediate gear (27), and the first intermediate gear (27) is equipped with a sixth needle roller bearing (28), and the sixth needle roller bearing (28) is connected to the outside of the second intermediate shaft (29). The second intermediate shaft (29) is connected to the first roller bearing (211) on both sides, and the second intermediate gear (212) is installed on the outside of the left side of the second intermediate shaft (29). The upper end of the second intermediate gear (212) meshes with the input gear shaft (22). The middle part of the housing (21) is provided with a front and rear drive assembly (213), and the front and rear drive assembly (213) meshes with the lower end of the first intermediate gear (27). The lower end of the housing (21) is provided with a second shift fork assembly (214).

6. The front and rear drive transfer case assembly according to claim 5, characterized in that: The first shift fork assembly (26) includes a connecting shell (261) installed on the top of the housing (21). The connecting shell (261) is connected to the top of the housing (21). The connecting shell (261) is equipped with a high and low gear shift fork shaft (262). The left side of the high and low gear shift fork shaft (262) is connected to the first plug (263). The left side of the high and low gear shift fork shaft (262) is abutted against a first spring steel ball (264). The middle part of the high and low gear shift fork shaft (262) is equipped with a high and low gear shift fork (265). The right side of the connecting shell (261) is connected to the side cover plate (266). The side cover plate (266) is equipped with a first cylinder body (267). The first cylinder body (267) is connected to the right side of the high and low gear shift fork shaft (262). The lower end of the high and low gear shift fork shaft (262) is connected to the second sliding tooth sleeve (268).

7. The front and rear drive transfer case assembly according to claim 5, characterized in that: The front and rear drive assembly (213) includes a front drive spline shaft (2131), which is mounted in the middle of the housing (21). A fourth deep groove bearing (2132) is connected to the outer left side of the front drive spline shaft (2131), and a seventh needle roller bearing (2133) is provided on the outer right side of the front drive spline shaft (2131). The outer end of the seventh needle roller bearing (2133) is connected to the second input gear (2134), and the upper end of the second input gear (2134) meshes with the first intermediate gear (27). The right side of the front drive spline shaft (2131) is connected to the second roller bearing. The bearings (2135) are connected in the middle, and the front drive spline shaft (2131) is equipped with a fourth sliding tooth sleeve (2136) in the middle. The second input gear (2134) is provided with a rear drive gear (2137) at the lower end, and the rear drive gear (2137) is connected to the rear drive shaft (2138) in the middle. The rear drive shaft (2138) is equipped with a third roller bearing (2139) on both sides of its outer side, and the right side of the rear drive shaft (2138) is connected to the odometer drive gear (21310). The odometer drive gear (21310) is equipped with an inner odometer seat (21311) on its outer side.

8. The front and rear drive transfer case assembly according to claim 5, characterized in that: The second shift fork assembly (214) includes a front drive shift fork shaft (2141), which is mounted on the lower end of the housing (21). The left side of the front drive shift fork shaft (2141) is connected to the second plug (2142). The front drive shift fork shaft (2141) is abutted against the outside of the second spring steel ball (2143). The front drive shift fork shaft (2141) is equipped with a front drive shift fork (2144) in the middle. The right side of the front drive shift fork shaft (2141) is connected to the second cylinder block (2145).

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