Transfer case assembly

Abstract

The transfer case assembly comprises a shell, a side cover plate, an input shaft, a middle shaft, a high-low gear adjusting assembly, a rear drive spline shaft, a front drive control assembly, a front drive spline shaft, a high-low gear air cylinder, a high-low gear shifting fork shaft, a high-low gear shifting fork and a positioning assembly. The positioning assembly is optimally arranged, the three annular grooves are formed in the right side of the outer surface of the high-low-gear shifting fork shaft, the steel ball is clamped into one annular groove through the counter-acting force of the spring, and when the high-low-gear shifting fork shaft moves to achieve high-low-speed conversion, the positioning assembly plays a role in positioning the high-low-gear shifting fork shaft; in addition, the high-low gear shifting fork shaft can drive the high-low gear adjusting assembly to move to the neutral gear position to be positioned, then three-gear positioning is achieved after the high-low gear shifting fork shaft moves, the high-speed or low-speed or neutral gear function is achieved, the stability of the high-low gear shifting fork shaft after the high-low gear shifting fork shaft moves is guaranteed, and the dynamic balance effect is guaranteed to a certain degree.

Description

Technical Field

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

[0002] The role of the transfer case assembly in the vehicle is to distribute power. It inputs power through the transfer case drive shaft, and then relies on the gear transmission system inside the transfer case to distribute the power reasonably to the front axle and the rear axle, enabling four-wheel drive.

[0003] Currently, Chinese patent application number CN201420166171.7 discloses a pneumatic transfer case, including a housing and an input gear shaft and its input gear, a front axle drive shaft and its front axle output gear, a front axle shift fork shaft, a rear axle drive shaft and its rear axle output gear, an intermediate gear shaft and its high and low speed gears, all rotatably mounted on the housing. A front axle sliding sleeve is provided on the front axle drive shaft via splines, and a sliding sleeve is provided on the intermediate gear shaft via splines that can slide left and right. The housing is provided with a front axle output pneumatic assembly for controlling the engagement and disengagement of the front axle drive shaft and the front axle shift fork shaft. The housing is also provided with a high and low speed pneumatic assembly for controlling the left and right sliding of the high and low speed sliding sleeves to achieve speed changes.

[0004] However, in the use of existing transfer cases, it is usually necessary to move the position of the sliding sleeve to adjust the gear. However, most of them only allow for two gear adjustments, and after the gear is adjusted, it is inconvenient to limit the position of the shift fork shaft. In the neutral state, the stability of the sliding sleeve is poor, which affects the dynamic balance of the system after gear adjustment. Utility Model Content

[0005] The purpose of this invention is to provide a 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 transfer case assembly, comprising a housing, a side cover plate, an input shaft, an intermediate shaft, a high / low gear adjustment component, a rear drive spline shaft, a front drive control component, a front drive spline shaft, a high / low gear cylinder, a high / low gear shift fork shaft, a high / low gear shift fork, and a positioning component. The right side of the housing is tightly fitted with the side cover plate. Inside the housing, from top to bottom, the upper middle side is sequentially arranged with the input shaft, the intermediate shaft, and the high / low gear adjustment component. The right side of the high / low gear adjustment component is connected to the rear drive spline shaft, and the left side of the high / low gear adjustment component is connected to the front drive spline shaft via the front drive control component. A high / low gear cylinder is provided on the bottom left side of the body. The output end of the high / low gear cylinder is connected to a high / low gear shift fork shaft. A high / low gear shift fork is tightly fitted on the middle side of the outer surface of the high / low gear shift fork shaft, and the top side of the high / low gear shift fork is connected to the high / low gear adjustment component. A positioning component is provided through the bottom inside the side cover plate. The positioning component includes a positioning seat embedded in the bottom inside the side cover plate, an external hexagonal bolt locked on the top middle side of the positioning seat, a spring set at the bottom of the external hexagonal bolt, and a steel ball installed at the bottom of the spring. Three annular grooves are opened on the right side of the outer surface of the high / low gear shift fork shaft, and the top side of the annular grooves contacts the steel ball.

[0007] Preferably, a 24-tooth gear is provided on the left side of the outer surface of the input shaft, and a 33-tooth gear and a 21-tooth gear are provided on the left and right sides of the outer surface of the intermediate shaft, respectively, with the top side of the 33-tooth gear meshing with the 24-tooth gear.

[0008] Preferably, the high / low gear adjustment assembly includes a support shaft connected to the rear drive spline shaft on the right side, and a 24-tooth high-speed gear, a 25-tooth sliding sleeve, and a 32-tooth low-speed gear arranged from left to right on the outer surface of the support shaft. The bottom left side of the support shaft is connected to the front drive control assembly. The top side of the 24-tooth high-speed gear meshes with the 33-tooth gear, and the top side of the 32-tooth low-speed gear meshes with the 21-tooth gear. The bottom middle side of the 25-tooth sliding sleeve is connected to the high / low gear shift fork. The support shaft is divided into left and right sections, and the left and right sides of the 25-tooth sliding sleeve respectively mesh and slide inside the left and right sections of the support shaft. When the 25-tooth sliding sleeve is on the left side, its inner left side meshes with the 24-tooth high-speed gear, and when the 25-tooth sliding sleeve is on the right side, its inner right side meshes with the 32-tooth low-speed gear.

[0009] Preferably, copper sleeves are provided at the connection points between the left and right sides of the outer surface of the support shaft and the 24-tooth high-speed gear and the 32-tooth low-speed gear.

[0010] Preferably, the front drive control assembly includes a front drive cylinder fastened to the lower left side of the housing, a front drive shift fork shaft connected to the right output end of the front drive cylinder, a front drive shift fork fastened to the right side of the outer surface of the front drive shift fork shaft, and a front drive release sleeve disposed on the top of the front drive shift fork. The front drive release sleeve is slidably engaged with the right side of the outer surface of the front drive spline shaft, and when the front drive release sleeve moves to the right side, its inner right side engages with the support shaft for transmission.

[0011] Preferably, the right side of the outer surface of the front spline shaft and the left side of the outer surface of the support shaft are provided with tooth grooves.

[0012] Preferably, a speedometer drive gear is provided on the middle side of the outer surface of the rear drive spline shaft, and a speedometer mount for mounting the speedometer is provided below the speedometer drive gear.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention uses a front-drive control component to connect or disconnect the front-drive spline shaft from the high / low gear adjustment component, enabling four-wheel drive or two-wheel drive functionality. Under the action of the high / low gear cylinder, the high / low gear shift fork shaft drives the high / low gear adjustment component, achieving high / low speed switching. Furthermore, an optimized positioning component is incorporated, with three annular grooves on the right side of the high / low gear shift fork shaft's outer surface. A spring's reaction force causes a steel ball to engage in one of these grooves, providing positioning for the high / low gear shift fork shaft as it moves to achieve high / low speed switching. This component also allows the high / low gear shift fork shaft to move the high / low gear adjustment component to the neutral position for positioning, thus achieving three-gear positioning after the shift fork shaft's movement. This enables high / low speed, low speed, or neutral functions while ensuring the stability of the high / low gear shift fork shaft after movement, thus guaranteeing dynamic balance to a certain extent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the high / low gear adjustment component, the rear drive spline shaft, the front drive control component, and the connection of the front drive spline shaft of this utility model.

[0017] Figure 3 This is a schematic diagram of the positioning component of this utility model.

[0018] In the diagram: Housing-1, Side Cover Plate-2, Input Shaft-3, Intermediate Shaft-4, High / Low Gear Adjustment Component-5, Rear Drive Spline Shaft-6, Front Drive Control Component-7, Front Drive Spline Shaft-8, High / Low Gear Cylinder-9, High / Low Gear Shift Fork Shaft-10, High / Low Gear Shift Fork-11, Positioning Component-12, 24-Tooth Gear-31, 33-Tooth Gear-41, 21-Tooth Gear-42, Support Shaft-51, 24-Tooth High Gear Gear-52, 25-Tooth Sliding Gear Sleeve-53, 32-Tooth Low Gear Gear-54, Odometer Drive Gear-61, Odometer Mount-62, Front Drive Cylinder-71, Front Drive Shift Fork Shaft-72, Front Drive Shift Fork-73, Front Drive Separator Sleeve-74, Annular Groove-101, Positioning Seat-121, External Hex Bolt-122, Spring-123, Steel Ball-124. 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 1This utility model provides a transfer case assembly, including a housing 1, a side cover plate 2, an input shaft 3, an intermediate shaft 4, a high / low gear adjustment component 5, a rear drive spline shaft 6, a front drive control component 7, a front drive spline shaft 8, a high / low gear cylinder 9, a high / low gear shift fork shaft 10, a high / low gear shift fork 11, and a positioning component 12. The side cover plate 2 is tightly attached to the right side of the housing 1. The input shaft 3, the intermediate shaft 4, and the high / low gear adjustment component 5 are arranged sequentially from top to bottom on the upper middle side of the housing 1. The high / low gear adjustment component 5 is connected to the right side of the... A rear drive spline shaft 6 is connected, and the left side of the high / low gear adjustment component 5 is connected to the front drive spline shaft 8 via the front drive control component 7. The front drive control component 7 enables the front drive spline shaft 8 to be connected or disconnected from the high / low gear adjustment component 5 to achieve four-wheel drive or two-wheel drive function. A high / low gear cylinder 9 is provided on the bottom left side of the housing 1. The output end of the high / low gear cylinder 9 is connected to a high / low gear shift fork shaft 10. A high / low gear shift fork 11 is tightly fitted to the middle side of the outer surface of the high / low gear shift fork shaft 10, and the high / low gear shift fork 11 is topped with... The side is connected to the high / low gear adjustment component 5. Under the action of the high / low gear cylinder 9, the high / low gear shift fork shaft 10 drives the high / low gear adjustment component 5 through the high / low gear shift fork 11 to achieve high / low speed switching. A positioning component 12 is installed through the bottom inside the side cover plate 2. The left side of the positioning component 12 is connected to the high / low gear shift fork shaft 10, which can realize three-gear positioning after the high / low gear shift fork shaft 10 moves to achieve high speed, low speed or neutral function, and ensure the high / low gear shift fork To ensure the stability of shaft 10 after it moves, a 24-tooth gear 31 is provided on the left side of the outer surface of input shaft 3, and a 33-tooth gear 41 and a 21-tooth gear 42 are provided on the left and right sides of the outer surface of intermediate shaft 4, respectively. The top side of the 33-tooth gear 41 meshes with the 24-tooth gear 31, so that the intermediate shaft 4 and the 21-tooth gear 42 are driven to move through the cooperation of the 24-tooth gear 31 and the 33-tooth gear 41, so that the 33-tooth gear 41 and the 21-tooth gear 42 drive the high and low gear adjustment component 5 to rotate.

[0021] Please see Figure 1 and Figure 2This utility model provides a transfer case assembly. The high / low gear adjustment component 5 includes a support shaft 51 connected to the rear drive spline shaft 6 on the right side, and a 24-tooth high-speed gear 52, a 25-tooth sliding gear sleeve 53, and a 32-tooth low-speed gear 54 arranged from left to right on the outer surface of the support shaft 51. The bottom left side of the support shaft 51 is connected to the front drive control component 7. The top side of the 24-tooth high-speed gear 52 meshes with the 33-tooth gear 41, and the top side of the 32-tooth low-speed gear 54 meshes with the 21-tooth gear 42. The bottom middle side of the 25-tooth sliding gear sleeve 53 is connected to the high / low gear shift fork 11. The support shaft 51 is divided into left and right sections, and... The 25-tooth sliding sleeve 53 is respectively engaged and slidable on the inner side of the left and right sections of the support shaft 51. When the 25-tooth sliding sleeve 53 is on the left side, its inner left side is engaged with the 24-tooth high-speed gear 52. When the 25-tooth sliding sleeve 53 is on the right side, its inner right side is engaged with the 32-tooth low-speed gear 54. Copper sleeves are provided at the connection points between the left and right sides of the outer surface of the support shaft 51 and the 24-tooth high-speed gear 52 and the 32-tooth low-speed gear 54 to ensure the stability of the rotation of the 24-tooth high-speed gear 52 and the 32-tooth low-speed gear 54 and to prevent friction between them and the support shaft 51, thereby reducing the loss of rotational force of the support shaft 51.

[0022] The front drive control assembly 7 includes a front drive cylinder 71 fastened to the lower left side of the housing 1, a front drive shift fork shaft 72 connected to the right output end of the front drive cylinder 71, a front drive shift fork 73 fastened to the right side of the outer surface of the front drive shift fork shaft 72, and a front drive release sleeve 74 disposed on the top of the front drive shift fork 73. The front drive release sleeve 74 is slidably engaged with the right side of the outer surface of the front drive spline shaft 8, and when the front drive release sleeve 74 moves to the right side, its inner right side engages with the support shaft 51 for transmission. The right side of the outer surface of the front drive spline shaft 8 and the left side of the outer surface of the support shaft 51 are provided with tooth grooves so that the movement of the front drive release sleeve 74 can realize the adjustment control of four-wheel drive or two-wheel drive. The middle side of the outer surface of the rear drive spline shaft 6 is provided with an odometer drive gear 61, and an odometer mount 62 for mounting the odometer is provided below the odometer drive gear 61 to facilitate the monitoring of the driving mileage.

[0023] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a transfer case assembly. The positioning component 12 includes a positioning seat 121 embedded in the bottom side of the side cover plate 2, an external hexagonal bolt 122 locked to the top middle side of the positioning seat 121, a spring 123 set at the bottom of the external hexagonal bolt 122, and a steel ball 124 installed at the bottom of the spring 123. Three annular grooves 101 are opened on the right side of the outer surface of the high and low gear shift fork shaft 10, and the top side of the annular groove 101 contacts the steel ball 124. The reaction force of the spring 123 causes the steel ball 124 to be stuck into one of the annular grooves 101 to ensure the stability of the high and low gear shift fork shaft 10 after the position is moved.

[0024] The working principle of the transfer case assembly of this utility model is as follows:

[0025] First, when in use, after the input shaft 3 rotates, the intermediate shaft 4 and the 21-tooth gear 42 are driven to move through the cooperation of the 24-tooth gear 31 and the 33-tooth gear 41, so that the 33-tooth gear 41 and the 21-tooth gear 42 drive the 24-tooth high-speed gear 52 and the 32-tooth low-speed gear 54 to rotate.

[0026] Second, when high-speed gear rotation is required, the high-low gear cylinder 9 is controlled to move the high-low gear shift fork shaft 10 so that the 25-tooth sliding sleeve 53 moves to the left through the high-low gear shift fork 11 and engages with the 24-tooth high-speed gear 52. At this time, the rightmost annular groove 101 of the high-low gear shift fork shaft 10 engages with the steel ball 124, thereby causing the 25-tooth sliding sleeve 53 to rotate under the action of the 24-tooth high-speed gear 52, so as to drive the rear drive spline shaft 6 to rotate or the front drive spline shaft 8 and the rear drive spline shaft 6 to rotate synchronously, so as to realize the two-wheel drive or four-wheel drive function.

[0027] Third, when low-speed rotation is required, the high-low gear cylinder 9 is controlled to move the high-low gear shift fork shaft 10 so that the 25-tooth sliding sleeve 53 moves to the right through the high-low gear shift fork 11 and engages with the 32-tooth low-speed gear 54. At this time, the leftmost annular groove 101 of the high-low gear shift fork shaft 10 engages with the steel ball 124, thereby causing the 25-tooth sliding sleeve 53 to rotate under the action of the 32-tooth low-speed gear 54, so as to drive the rear drive spline shaft 6 to rotate or the front drive spline shaft 8 and the rear drive spline shaft 6 to rotate synchronously, so as to realize the two-wheel drive or four-wheel drive function.

[0028] Fourth, the high and low gear cylinder 9 can be controlled to move the 25-tooth sliding sleeve 53 to the middle position. At this time, the left and right sides of the 25-tooth sliding sleeve 53 are not in meshing contact with the 24-tooth high-speed gear 52 and the 32-tooth low-speed gear 54. The steel ball 124 falls into the annular groove 101 in the middle position of the high and low gear shift fork shaft 10. At this time, it is in neutral and does not provide driving force to the front drive spline shaft 8 and the rear drive spline shaft 6.

[0029] 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 transfer case assembly, comprising a housing (1), a side cover plate (2) tightly fitted on the right side of the housing (1), an input shaft (3), an intermediate shaft (4) and a high / low gear adjustment assembly (5) arranged sequentially from top to bottom on the upper middle side inside the housing (1), a rear drive spline shaft (6) connected to the right side of the high / low gear adjustment assembly (5), and a front drive spline shaft (8) connected to the left side of the high / low gear adjustment assembly (5) via a front drive control assembly (7), a high / low gear cylinder (9) arranged on the bottom left side of the housing (1), a high / low gear shift fork shaft (10) connected to the right output end of the high / low gear cylinder (9), a high / low gear shift fork (11) tightly fitted on the middle side of the outer surface of the high / low gear shift fork shaft (10), and the top side of the high / low gear shift fork (11) connected to the high / low gear adjustment assembly (5), characterized in that: It also includes a positioning component (12) that runs through the bottom inside the side cover plate (2). The positioning component (12) includes a positioning seat (121) embedded in the bottom inside the side cover plate (2), an external hexagonal bolt (122) locked in the middle of the top of the positioning seat (121), a spring (123) set at the bottom of the external hexagonal bolt (122), and a steel ball (124) installed at the bottom of the spring (123). Three annular grooves (101) are opened on the right side of the outer surface of the high and low gear shift fork shaft (10), and the top side of the annular groove (101) is in contact with the steel ball (124).

2. The transfer case assembly according to claim 1, characterized in that: A 24-tooth gear (31) is provided on the left side of the outer surface of the input shaft (3), and a 33-tooth gear (41) and a 21-tooth gear (42) are provided on the left and right sides of the outer surface of the intermediate shaft (4), respectively. The top side of the 33-tooth gear (41) meshes with the 24-tooth gear (31).

3. The transfer case assembly according to claim 2, characterized in that: The high / low gear adjustment assembly (5) includes a support shaft (51) connected to the rear drive spline shaft (6) on the right side, and a 24-tooth high-speed gear (52), a 25-tooth sliding gear sleeve (53), and a 32-tooth low-speed gear (54) arranged from left to right on the outer surface of the support shaft (51). The bottom left side of the support shaft (51) is connected to the front drive control assembly (7). The top side of the 24-tooth high-speed gear (52) meshes with the 33-tooth gear (41), and the top side of the 32-tooth low-speed gear (54) meshes with the 21-tooth gear. (42) The 25-tooth sliding sleeve (53) is connected to the high and low gear shift fork (11) at the bottom center. The support shaft (51) is divided into left and right sections, and the left and right sides of the 25-tooth sliding sleeve (53) are respectively engaged and slid on the inner side of the support shaft (51) of the left and right sections. When the 25-tooth sliding sleeve (53) is on the left side, the inner left side is engaged with the 24-tooth high speed gear (52). When the 25-tooth sliding sleeve (53) is on the right side, the inner right side is engaged with the 32-tooth low speed gear (54).

4. The transfer case assembly according to claim 3, characterized in that: Copper sleeves are provided at the connection points between the left and right sides of the outer surface of the support shaft (51) and the 24-tooth high-speed gear (52) and the 32-tooth low-speed gear (54).

5. A transfer case assembly according to claim 3, characterized in that: The front drive control assembly (7) includes a front drive cylinder (71) fastened to the lower left side of the housing (1), a front drive shift fork shaft (72) connected to the right output end of the front drive cylinder (71), a front drive shift fork (73) fastened to the right side of the outer surface of the front drive shift fork shaft (72), and a front drive release sleeve (74) disposed on the top of the front drive shift fork (73). The front drive release sleeve (74) is slidably engaged with the right side of the outer surface of the front drive spline shaft (8), and when the front drive release sleeve (74) moves to the right side, the inner right side engages with the support shaft (51) for transmission.

6. The transfer case assembly according to claim 5, characterized in that: The right side of the outer surface of the front spline shaft (8) and the left side of the outer surface of the support shaft (51) are both provided with tooth grooves.

7. The transfer case assembly according to claim 1, characterized in that: The rear drive spline shaft (6) has an odometer drive gear (61) on the middle side of its outer surface, and an odometer mount (62) for mounting the odometer is provided below the odometer drive gear (61).

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