Transmission structure of vehicle hub

Abstract

The utility model belongs to the technical field of automobile hubs, and particularly relates to a vehicle hub transmission structure which comprises a hub and an electric driving mechanism used for providing power for the hub, and further comprises a claw-shaped transmission box body used as a supporting system of the vehicle hub transmission structure. The bearing position which is communicated with the claw-shaped transmission box body and is provided with a through hole is arranged at the front end of the claw-shaped transmission box body; the first hub bearing is mounted in the bearing position; a flange shaft head; a reduction gear output shaft; wherein the front end of the first hub bearing abuts against the bearing position, and the side, facing the front end of the claw-shaped transmission box body, of the gear part of the reduction gear output shaft abuts against the rear end of the first hub bearing. The transmission structure of the vehicle hub has better load capacity and durability, and meanwhile, the stability of power transmission can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wheel hubs, in particular to a transmission structure of a vehicle wheel hub. Background Art

[0002] In the wheel hub transmission structure of a vehicle, the flange shaft head plays a key role in transmitting torque and bearing load.

[0003] In the prior art, the flange shaft head is usually connected to the transmission case to cooperate with the reduction assembly in the transmission case to transmit torque. The matching structure between the flange shaft head and the transmission case is usually complex and prone to matching deviation, which affects the overall transmission stability and load bearing capacity. In addition, its complex matching structure is not convenient for the installation, disassembly and maintenance of the flange shaft head. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a wheel hub transmission structure for a vehicle to solve the above problems.

[0005] The technical solution of the utility model is implemented as follows: a transmission structure of a vehicle wheel hub, comprising a wheel hub and an electric drive mechanism for providing power to the wheel hub, and further comprising:

[0006] The ram-horn type transmission housing is used as a support system for the vehicle wheel hub transmission structure;

[0007] A bearing seat, the front end of the ram-horn transmission housing is provided with a bearing seat which is in communication with the ram-horn transmission housing and has a through hole;

[0008] A first wheel hub bearing, the first wheel hub bearing is installed in the bearing position;

[0009] The flange shaft head comprises a shaft sleeve portion and a disc body portion which are integrally connected, the shaft sleeve portion passes through the through hole and is sleeved with the inner ring of the first hub bearing, the shaft sleeve portion of the flange shaft head is hollow, the hollow portion forms a connecting shaft hole, and the disc body portion is used to be connected to the hub support;

[0010] The reduction gear output shaft comprises a main shaft portion and a gear portion which are integrally connected, and the end of the main shaft portion passes through the connecting shaft hole and is sleeved with the flange shaft head;

[0011] The nut is installed on the end of the main shaft of the reduction gear output shaft and is used to axially lock the flange shaft head;

[0012] The front end of the first hub bearing abuts against the bearing seat, and the gear portion of the reduction gear output shaft abuts against the rear end of the first hub bearing on one side facing the front end of the ram's horn type transmission housing.

[0013] Furthermore, it also includes:

[0014] A cover plate, a receiving chamber is formed between the ram-horn-shaped transmission box body and the cover plate, and a box body matching surface is provided on the side of the cover plate facing the ram-horn-shaped transmission box body;

[0015] The housing mating surface of the cover plate is fixed to the ram-horn type transmission housing by bolts. Further, the ram-horn type transmission housing includes:

[0016] The ram-horn-shaped structure is installed on the outer shell or cover plate of the ram-horn-shaped transmission box body. Specifically, it is installed on the outer shell of the ram-horn-shaped transmission box body and is located in the middle of the upper end of the outer shell of the ram-horn-shaped transmission box body; it can also be installed on the cover plate and is located in the middle of the upper end of the cover plate;

[0017] When the ram-horn structure is mounted on the outer shell of the ram-horn transmission housing, the ram-horn structure and the ram-horn transmission housing are integrally formed;

[0018] When the ram-horn-shaped structure is installed on the cover plate, the ram-horn-shaped structure and the cover plate are formed integrally.

[0019] Furthermore, a fixing structure for preventing circumferential rotation is provided between the shaft sleeve portion of the flange shaft head and the main shaft portion of the reduction gear output shaft.

[0020] Furthermore, the fixed structure includes:

[0021] External splines are integrally formed on the outer peripheral wall of the reduction gear output shaft;

[0022] The internal spline is integrally formed in the connecting shaft hole of the flange shaft head to adapt to the external spline;

[0023] The inner edge of the inlet end of the flange shaft head connecting shaft hole is provided with a smooth surface which is circumferentially fitted with one side of the outer peripheral wall of the main shaft part of the reduction gear output shaft.

[0024] Furthermore, it also includes:

[0025] The oil seal is sleeved on the shaft sleeve portion of the flange shaft head, and the radial outer side of the oil seal is fixedly installed in the through hole of the bearing position.

[0026] The beneficial effects of the utility model are:

[0027] The structural layout of the reduction gear output shaft with the flange shaft head is easy to assemble and disassemble, and the overall structure is compact, so that the transmission structure of the vehicle hub has better load capacity and durability, while ensuring the stability of power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] FIG1 is a cross-sectional view of a vehicle hub transmission structure according to a specific embodiment of the utility model;

[0030] FIG. 2 is a partial enlarged view of a specific implementation mode A of the present utility model. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1:

[0033] As shown in FIG. 1 and FIG. 2 , the utility model discloses a transmission structure of a vehicle wheel hub, including a wheel hub and an electric drive mechanism for providing power to the wheel hub, and also includes:

[0034] The ram-horn type transmission housing 1 is used as a support system for the vehicle wheel hub transmission structure;

[0035] Bearing position 2: The front end of the ram-horn transmission housing 1 is provided with a bearing position 2 which is in communication with the ram-horn transmission housing 1 and has a through hole;

[0036] A first wheel hub bearing 3, the first wheel hub bearing 3 is installed in the bearing position 2;

[0037] The flange shaft head 4 includes a sleeve portion and a disc portion which are integrally connected. The sleeve portion passes through the through hole and is sleeved with the inner ring of the first hub bearing 3. The sleeve portion of the flange shaft head 4 is hollow, and the hollow portion forms a connecting shaft hole. The disc portion is used to connect with the hub support.

[0038] The reduction gear output shaft 5 comprises a main shaft portion and a gear portion which are integrally connected, and the end of the main shaft portion passes through the connecting shaft hole and is sleeved with the flange shaft head 4;

[0039] The nut 6 is installed on the end of the main shaft of the reduction gear output shaft 5 and is used to axially lock the flange shaft head 4;

[0040] The front end of the first hub bearing 3 abuts against the bearing position 2 , and the gear portion of the reduction gear output shaft 5 abuts against the rear end of the first hub bearing 3 on the side facing the front end of the ram-shaped transmission housing 1 .

[0041] By adopting the above technical scheme, the ram's horn type transmission box serves as the main supporting force-bearing structure of the automobile. The force acting on the ram's horn type transmission box can be transmitted to the flange shaft head and the reduction gear output shaft through the first wheel hub bearing, and then transmitted to the wheel hub by the flange shaft head. In addition, the ram's horn type transmission box is close to the wheel hub in position, and the force transmission distance is shorter, that is, the lever arm is shorter, the overall force is more concentrated and compact, and the supporting structure strength is high; one side of the gear portion of the reduction gear output shaft abuts against one end of the first wheel hub bearing, that is, the first wheel hub bearing is axially abutted and pressed into the bearing position through the gear portion of the reduction gear output shaft toward the side of the first wheel hub bearing, thereby improving the firmness of the first wheel hub bearing, and thereby improving the stability of the overall power output of the wheel hub electric drive device.

[0042] Embodiment 2:

[0043] This embodiment provides a transmission structure of a vehicle wheel hub, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0044] Furthermore, it also includes:

[0045] The cover plate 101, a receiving chamber is formed between the ram-horn type transmission box body 1 and the cover plate 101, and a box body matching surface is provided on the side of the cover plate 101 facing the ram-horn type transmission box body 1;

[0046] The housing mating surface of the cover plate 101 is fixed to the ram-horn type transmission housing 1 by bolts.

[0047] By adopting the above technical solution, the connection is firm and disassembly and maintenance are convenient, and the formed accommodating chamber can be loaded with the transmission structure of the reduction gear output shaft.

[0048] Embodiment 3:

[0049] This embodiment provides a transmission structure of a vehicle wheel hub, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0050] Furthermore, the ram-horn type transmission housing 1 comprises:

[0051] The ram-horn structure is installed on the outer shell or cover plate 101 of the ram-horn transmission box 1, specifically, it is installed on the outer shell of the ram-horn transmission box and is located in the middle of the upper end of the outer shell of the ram-horn transmission box; it can also be installed on the cover plate and is located in the middle of the upper end of the cover plate;

[0052] When the ram-horn structure is installed on the outer shell of the ram-horn transmission box 1, the ram-horn structure and the ram-horn transmission box 1 are integrally formed; when the ram-horn structure is installed on the cover plate 2, the ram-horn structure and the cover plate 2 are integrally formed.

[0053] In this solution, the ram-horn structure is a ram-horn structure, which can bear external forces more effectively, thereby improving the stability and durability of the structure. The ram-horn structure is used as a connecting structure for connecting the driving device to the automobile frame. Specifically, the ram-horn structure is connected and fixed to the chassis part of the automobile outer frame. The lower end of the ram-horn structure can be provided with an extension part that penetrates the ram-horn transmission box 1 and extends into the accommodating chamber to increase the force-bearing area between the ram-horn structure and the outer shell of the ram-horn transmission box. The extension part can also be connected to the position of the ram-horn structure corresponding to the ram-horn structure in the ram-horn transmission box by welding or other fixing methods to improve the structural strength. The shape and specifications of the extension part can be adjusted according to the position of the speed reduction mechanism in the ram-horn transmission box.

[0054] By adopting the above technical solution, the load capacity and durability of the ram-horn transmission case are further improved, so that the electric drive device can output power stably and reliably during vehicle driving. The extension part will not interfere with the transmission structure in the gear case, and the space in the gear case can be effectively utilized. When the ram-horn structure is installed on the outer shell of the ram-horn transmission case 1, it can be applied to the front wheel of the vehicle. When the ram-horn structure is installed on the cover plate 2, it can be applied to the rear wheel of the vehicle, realizing diversified connection of the structure.

[0055] Embodiment 4:

[0056] This embodiment provides a transmission structure of a vehicle wheel hub, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0057] Furthermore, a fixing structure for preventing circumferential rotation is provided between the shaft sleeve portion of the flange shaft head 4 and the main shaft portion of the reduction gear output shaft 5 .

[0058] By adopting the above technical solution, the stability of power transmission is effectively guaranteed through the fixed structure.

[0059] Embodiment 5:

[0060] This embodiment provides a transmission structure of a vehicle wheel hub, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0061] Further, the fixing structure includes: an external spline, which is integrally formed on the outer peripheral wall of the reduction gear output shaft 6;

[0062] The internal spline is integrally formed in the connecting shaft hole of the flange shaft head 4 to fit the external spline;

[0063] The inner edge of the inlet end of the connecting shaft hole of the flange shaft head 4 is provided with a smooth surface which is circumferentially fitted with one side of the outer peripheral wall of the main shaft portion of the reduction gear output shaft 6 .

[0064] By adopting the above technical solution, the flange shaft head can rotate synchronously with the rotation of the reduction gear output shaft, thereby ensuring the stability of its power transmission.

[0065] Embodiment 6:

[0066] This embodiment provides a transmission structure of a vehicle wheel hub, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0067] Furthermore, it also includes:

[0068] The oil seal is sleeved on the shaft sleeve portion of the flange shaft head 4 , and the radial outer side of the oil seal is fixedly installed in the through hole of the bearing position 2 .

[0069] By adopting the above technical solution, the lubricating oil in the transmission box can be prevented from leaking out and the sealing performance can be improved. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transmission structure of a vehicle wheel hub, comprising a wheel hub and an electric drive mechanism for providing power to the wheel hub, characterized in that: Also includes: A ram-horn-shaped transmission housing (1) is used as a support system for a vehicle wheel hub transmission structure; A bearing seat (2), wherein the front end of the ram-horn type transmission housing (1) is provided with a bearing seat (2) which is in communication with the ram-horn type transmission housing (1) and has a through hole; A first wheel hub bearing (3), the first wheel hub bearing (3) being installed in the bearing position (2); The flange shaft head (4) comprises a shaft sleeve portion and a disc body portion which are integrally connected, the shaft sleeve portion passing through the through hole and being sleeved with the inner ring of the first wheel hub bearing (3), the shaft sleeve portion of the flange shaft head (4) being hollow, the hollow portion forming a connecting shaft hole, and the disc body portion being used for connecting with the wheel hub support; The reduction gear output shaft (5) comprises a main shaft portion and a gear portion which are integrally connected, and the end of the main shaft portion passes through the connecting shaft hole and is sleeved with the flange shaft head (4); A nut (6) is mounted on the end of the main shaft of the reduction gear output shaft (5) and is used to axially lock the flange shaft head (4); The front end of the first wheel hub bearing (3) abuts against the bearing position (2), and the side of the gear portion of the reduction gear output shaft (5) facing the front end of the ram-horn type transmission housing (1) abuts against the rear end of the first wheel hub bearing (3).

2. The transmission structure of a vehicle wheel hub according to claim 1, characterized in that: Also includes: A cover plate (101), a receiving chamber is formed between the ram-horn-shaped transmission housing (1) and the cover plate (101), and a housing mating surface is provided on a side of the cover plate (101) facing the ram-horn-shaped transmission housing (1); The housing mating surface of the cover plate (101) is fixed to the ram-horn-shaped transmission housing (1) by means of bolts.

3. The transmission structure of a vehicle wheel hub according to claim 1, characterized in that: The ram-horn type transmission housing (1) comprises: a ram-horn type structure, which is installed on the outer shell or cover plate (101) of the ram-horn type transmission housing (1).

4. The transmission structure of a vehicle wheel hub according to claim 1, characterized in that: A fixing structure for preventing circumferential rotation is provided between the shaft sleeve portion of the flange shaft head (4) and the main shaft portion of the reduction gear output shaft (5).

5. The transmission structure of a vehicle wheel hub according to claim 4, characterized in that: The fixed structure includes: An external spline (7) is integrally formed on the outer peripheral wall of the reduction gear output shaft (5); An internal spline (8) is integrally formed in the connecting shaft hole of the flange shaft head (4) and is adapted to fit the external spline (7); The inner edge of the inlet end of the connecting shaft hole of the flange shaft head (4) is provided with a smooth surface which is circumferentially fitted with one side of the outer peripheral wall of the main shaft portion of the reduction gear output shaft (5).

6. The transmission structure of a vehicle wheel hub according to claim 1, characterized in that: Also includes: The oil seal is sleeved on the shaft sleeve portion of the flange shaft head (4), and the radial outer side of the oil seal is fixedly installed in the through hole of the bearing position (2).

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