Shaft head adjusting structure of hub electric driving device

Abstract

The utility model belongs to the technical field of automobile wheel hubs, and particularly relates to a shaft head adjusting structure of a wheel hub electric driving device, which comprises a wheel hub and an electric driving mechanism for providing power for the wheel hub, and further comprises a motor end cover positioned between the wheel hub and the electric driving mechanism; a load output shaft; a bearing position; a flange shaft head; a locking member; an output shaft gear part; a step face is arranged on the radial outer side between the load output shaft motor end cover and the electric driving mechanism in the circumferential direction, the rear end of the output shaft gear part abuts against the step face, and the front end of the output shaft gear part abuts against the rear end of the load bearing. The utility model has the beneficial effects that through the arrangement of the load bearing, stable support is provided for the power transmission of the load output shaft, and then the step surface can be propped against the rear end of the gear part of the output shaft by adjusting the screw cap, so that the gear part of the output shaft can firmly prop against the load bearing in the bearing position to realize locking; the power output stability of the load output shaft is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wheel hubs, in particular to a shaft head adjusting structure of a wheel hub electric drive device. Background Art

[0002] In the prior art, after the wheel hub electric drive device is assembled as a whole, if it is found that the power output is not smooth, the entire wheel hub electric drive device needs to be disassembled for adaptation and adjustment, which is quite troublesome. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a shaft head adjustment structure for a wheel hub electric drive device.

[0004] The technical solution of the utility model is implemented as follows: a shaft head adjustment structure of a wheel hub electric drive device includes a wheel hub and an electric drive mechanism that provides power to the wheel hub, and also includes:

[0005] The motor end cover is located between the wheel hub and the electric drive mechanism;

[0006] A load output shaft, one end of which is mounted on the motor end cover through a load bearing and is used to transmit power generated by the electric drive mechanism to the wheel hub;

[0007] Bearing seat: a bearing seat with a through hole is arranged at the front end of the motor end cover, a load bearing is installed in the bearing seat, and a front end of the load bearing abuts against the bearing seat;

[0008] The flange shaft head, the shaft sleeve of the flange shaft head passes through the through hole of the motor end cover and is sleeved with the inner ring of the load bearing, the shaft sleeve of the flange shaft head is hollow, the hollow part forms a connecting shaft hole, and the disc body of the flange shaft head is used to connect with the hub support;

[0009] The front end of the load output shaft passes through the connecting shaft hole and is sleeved with the shaft sleeve of the flange shaft head, and is connected with the locking piece, which is used to axially lock the front end of the load output shaft;

[0010] The output shaft gear part is located between the motor end cover and the electric drive mechanism and is sleeved on the outer side of the load output shaft;

[0011] The load output shaft is located between the motor end cover and the electric drive mechanism and is circumferentially provided with a step surface on the radial outer side. The rear end of the output shaft gear part abuts against the step surface, and the front end of the output shaft gear part abuts against the rear end of the load bearing.

[0012] Furthermore, a spline structure is provided between the flange shaft head and the load output shaft.

[0013] Furthermore, the locking piece is a nut.

[0014] Furthermore, a steel ring is sleeved on the outer side of the load bearing.

[0015] Furthermore, a protruding portion arranged in an annular manner is integrally connected to a side of the output shaft gear portion facing the wheel hub bearing, and an outer ring of the protruding portion is sleeve-fitted with an inner ring of the wheel hub bearing.

[0016] The beneficial effects of the utility model are:

[0017] By setting the load bearing, stable support is provided for the power transmission of the load output shaft, and then by adjusting the nut, the step surface can abut against the rear end of the output shaft gear part, so that the output shaft gear part can firmly abut the load bearing in the bearing position to achieve locking, thereby ensuring the stability of the power output of the load output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] FIG1 is a cross-sectional view of a wheel hub electric drive device according to a specific embodiment of the utility model. Figure 1 ;

[0020] FIG2 is a cross-sectional view of a wheel hub electric drive device according to a specific embodiment of the utility model Figure 2 ; DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0023] Embodiment 1:

[0024] like Figure 1 to Figure 2 As shown, the utility model discloses a shaft head adjustment structure of a wheel hub electric drive device, comprising a wheel hub 1 and an electric drive mechanism for providing power to the wheel hub 1, and also comprising:

[0025] The motor end cover 2 is located between the wheel hub and the electric drive mechanism;

[0026] A load output shaft 4, one end of which is mounted on the motor end cover 2 through a load bearing 5, and is used to transmit the power generated by the electric drive mechanism to the wheel hub;

[0027] Bearing position 7: the front end of the motor end cover 2 is provided with a bearing position 7 with a through hole, the load bearing 5 is installed in the bearing position 7, and the front end of the load bearing 5 abuts against the bearing position 7;

[0028] The flange shaft head 8, the shaft sleeve portion of the flange shaft head 8 passes through the through hole of the motor end cover 2 and is sleeved with the inner ring of the load bearing 5, the shaft sleeve portion of the flange shaft head 8 is hollow, and the hollow portion forms a connecting shaft hole, and the disc portion of the flange shaft head 8 is used for supporting and connecting with the wheel hub 1;

[0029] The front end of the load output shaft 4 passes through the connecting shaft hole and is sleeved with the shaft sleeve of the flange shaft head 8, and is connected with the locking piece 9, which is used to axially lock the front end of the load output shaft 4;

[0030] The output shaft gear portion 21 is located between the motor end cover 2 and the electric drive mechanism and is sleeved on the outside of the load output shaft 4. Specifically, the output shaft gear portion 21 is key-connected and fixed to the load output shaft 4.

[0031] The load output shaft 4 is located between the motor end cover 2 and the electric drive mechanism and has a stepped surface on its radial outer side. The rear end of the output shaft gear part 21 abuts against the stepped surface, and the front end of the output shaft gear part 21 abuts against the rear end of the load bearing 5 .

[0032] By adopting the above technical solution and setting the load bearing, a stable support is provided for the power transmission of the load output shaft, and then by adjusting the nut, the step surface can abut against the rear end of the output shaft gear portion, so that the output shaft gear portion can firmly abut the load bearing in the bearing position to achieve locking, thereby ensuring the stability of the power output of the load output shaft.

[0033] Embodiment 2:

[0034] This embodiment provides a shaft head adjustment structure of a wheel hub electric drive device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0035] Furthermore, a spline structure is provided between the flange shaft head 8 and the load output shaft 4 .

[0036] By adopting the above technical solution, the flange shaft head can rotate synchronously with the rotation of the load output, thereby driving the wheel hub to rotate. In addition to the spline structure, it can also be a keyway fixing structure or a bolt fixing structure.

[0037] Embodiment 3:

[0038] This embodiment provides a shaft head adjustment structure of a wheel hub electric drive device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] Furthermore, the locking member 9 is a nut.

[0040] By adopting the above technical solution, the tightness can be flexibly adjusted through the setting of the nut, so that the shaft head can rotate stably and smoothly.

[0041] Embodiment 4:

[0042] This embodiment provides a shaft head adjustment structure of a wheel hub electric drive device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0043] Furthermore, a steel ring is sleeved on the outer side of the load bearing.

[0044] By adopting the above technical solution, the steel ring and the motor end cover are placed in the bearing position during casting and are connected and fixed as a whole, so as to improve the structural strength of the bearing position and the stability of the load bearing, and better meet the load.

[0045] Embodiment 5:

[0046] This embodiment provides a shaft head adjustment structure of a wheel hub electric drive device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] Furthermore, a ring-shaped raised portion 211 is integrally connected to the side of the output shaft gear portion facing the wheel hub bearing, and the outer ring of the raised portion 211 is sleeve-fitted with the inner ring of the wheel hub bearing.

[0048] By adopting the above technical solution, the concentricity of the load bearing, the load output shaft and the output shaft gear can be guaranteed to ensure the stability of power transmission.

[0049] Embodiment 6:

[0050] This embodiment provides a shaft head adjustment structure of a wheel hub electric drive device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] Furthermore, it also includes a load connector 3, and the electric drive mechanism includes:

[0052] The motor housing 14 is installed at the rear end of the motor end cover 2, and a receiving chamber is formed between the motor housing 14 and the motor end cover 2. A rear end cover 15 is installed at the rear end of the motor housing 14, and a connection mating surface for adapting to the load connector 3 is provided at the rear end of the rear end cover 15;

[0053] A cover plate 16 is provided between the motor housing 14 and the motor end cover 2 to separate the accommodating chamber into a speed reduction output area and a motor accommodating area;

[0054] The motor output shaft 17, both ends of which are connected to the cover plate 16 and the rear end cover 15 through motor bearings 171, and the motor output shaft 17 is hollow, and the hollow part forms a through hole for the load output shaft 4 to pass through;

[0055] The rotor assembly 18 is installed in the motor accommodation area;

[0056] The stator assembly 19 is installed in the motor accommodation area and is used to cooperate with the rotor assembly 18 to output power to the motor output shaft 17;

[0057] The cover plate 16 is connected and fixed to the motor end cover 2, a speed reduction mechanism is arranged in the speed reduction output area, and the front end of the motor output shaft 17 extends into the speed reduction output area and is transmission-connected to the speed reduction mechanism;

[0058] The reduction mechanism includes:

[0059] A driving gear 181 is disposed at the front end of the motor output shaft 17;

[0060] A first driven shaft 191 is rotatably connected to the speed reduction output area, and a first driven wheel 1911 and a second driven wheel are provided on the first driven shaft 191;

[0061] The second driven shaft 20 is rotationally connected to the deceleration output area, and a third driven wheel 201 and a fourth driven wheel are provided on the second driven shaft 20, wherein the first driven wheel is meshed with the driving gear 181 for transmission, the second driven wheel is meshed with the third driven wheel 201 for transmission, and the fourth driven wheel is meshed with the output shaft gear portion 21 for transmission, so as to drive the load output shaft 4 to rotate.

[0062] By adopting the above technical solution, the motor end cover can be used as both the installation cover of the electric drive mechanism and the installation cover of the reduction mechanism, and is convenient to disassemble and assemble, and has a small size, and can accommodate the reduction mechanism and the electric drive mechanism within a limited wheel width space;

[0063] It can meet the transmission between the motor output shaft and the load output shaft in a smaller accommodation chamber, and better meet the speed ratio requirements;

[0064] In addition, in addition to being adaptable to the above-mentioned reduction transmission structure, the hub electric drive device can also be adapted to planetary gear transmission structures of different specifications to meet different design requirements.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shaft head adjustment structure of a wheel hub electric drive device, comprising a wheel hub (1) and an electric drive mechanism for providing power to the wheel hub (1), characterized in that: Also includes: A motor end cover (2), located between the wheel hub and the electric drive mechanism; A load output shaft (4), one end of which is mounted on the motor end cover (2) via a load bearing (5) and is used to transmit power generated by the electric drive mechanism to the wheel hub; A bearing seat (7), wherein the front end of the motor end cover (2) is provided with a bearing seat (7) having a through hole, the load bearing (5) is installed in the bearing seat (7), and the front end of the load bearing (5) abuts against the bearing seat (7); A flange shaft head (8), wherein the shaft sleeve portion of the flange shaft head (8) passes through the through hole of the motor end cover (2) and is sleeved with the inner ring of the load bearing (5), the shaft sleeve portion of the flange shaft head (8) is hollow, and the hollow portion forms a connecting shaft hole, and the disc portion of the flange shaft head (8) is used for supporting and connecting with the wheel hub (1); A locking piece (9), wherein the front end of the load output shaft (4) passes through the connecting shaft hole and is sleeved with the shaft sleeve portion of the flange shaft head (8), and is connected with the locking piece (9) for axially locking the front end of the load output shaft (4); An output shaft gear portion (21) is located between the motor end cover (2) and the electric drive mechanism and is sleeved on the outside of the load output shaft (4); The load output shaft (4) is located between the motor end cover (2) and the electric drive mechanism and is provided with a step surface in the radial outer circumferential direction. The rear end of the output shaft gear portion (21) abuts against the step surface, and the front end of the output shaft gear portion (21) abuts against the rear end of the load bearing (5).

2. The shaft head adjustment structure of the wheel hub electric drive device according to claim 1, characterized in that: A spline structure is provided between the flange shaft head (8) and the load output shaft (4).

3. The shaft head adjustment structure of the wheel hub electric drive device according to claim 1, characterized in that: The locking member (9) is a nut.

4. The shaft head adjustment structure of the wheel hub electric drive device according to claim 1, characterized in that: A steel ring is also sleeved on the outside of the load bearing.

5. The shaft head adjustment structure of the wheel hub electric drive device according to claim 1, characterized in that: A protruding portion (211) arranged in an annular manner is integrally connected to the side of the output shaft gear portion facing the wheel hub bearing, and the outer ring of the protruding portion (211) is sleeve-fitted with the inner ring of the wheel hub bearing.

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