Transmission mechanism, disc drive axle assembly and vehicle

Abstract

The present invention belongs to the technical field of vehicles, and discloses a transmission mechanism, a disc drive axle assembly and a vehicle. The transmission mechanism includes a hub unit, a flange plate assembly and a brake disc; the hub unit is coaxially arranged outside the axle head; the flange plate assembly is coaxially arranged outside the hub unit, a first spline portion is arranged on the inner side of the flange plate assembly, the first spline portion is in mating connection with the outer peripheral side of the hub unit, and the wheel side reducer housing is detachably connected to the flange plate assembly; the brake disc is coaxially arranged outside the axle head, is sequentially arranged with the flange plate assembly along the length direction of the axle head, and is detachably connected to the flange plate assembly. A part of the hub unit extends into the brake disc, a second spline portion is arranged on the inner side of the brake disc, the second spline portion is in mating connection with a part of the hub unit, and the second spline portion is arranged side by side and connected to the first spline portion along the length direction of the axle head. When disassembling and replacing the brake disc, it is not necessary to disassemble the hub unit from the axle head, thereby avoiding affecting the service life and sealing performance of the hub unit.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a transmission mechanism, a disc drive axle assembly and a vehicle. Background Art

[0002] A drive axle is a mechanism located at the end of the transmission system that can change the speed and torque from the transmission and transmit them to the drive wheels. In the existing disc drive axle, when disassembling and replacing the brake disc, the wheel hub needs to be removed at the same time. When removing the wheel hub, the service life of the wheel hub bearing will be reduced, and the sealing performance of the wheel hub oil seal will be affected.

[0003] Therefore, there is an urgent need for a transmission mechanism, a disc drive axle assembly and a vehicle to solve the above problems. Summary of the Invention

[0004] According to one aspect of the present invention, an object is to provide a transmission mechanism, which does not need to disassemble the wheel hub unit from the axle head when disassembling and replacing the brake disc, thereby avoiding affecting the service life and sealing performance of the wheel hub unit.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A transmission mechanism is configured to be coaxially installed on the axle head of a disc drive axle assembly and connected to the wheel side reducer housing. The transmission mechanism includes:

[0007] A wheel hub unit, which is coaxially arranged outside the axle head;

[0008] A flange plate assembly, which is coaxially arranged outside the wheel hub unit. A first spline portion is arranged on the inner side of the flange plate assembly, and the first spline portion is connected to the outer peripheral side of the wheel hub unit in a mating manner. The wheel side reducer housing is detachably connected to the flange plate assembly;

[0009] A brake disc, which is coaxially arranged outside the axle head, is arranged in sequence with the flange plate assembly along the length direction of the axle head, and is detachably connected to the flange plate assembly. A part of the wheel hub unit extends into the brake disc. A second spline portion is arranged on the inner side of the brake disc, and the second spline portion is connected to a part of the wheel hub unit in a mating manner. The second spline portion is arranged side by side with the first spline portion along the length direction of the axle head.

[0010] As a preferred solution of the transmission mechanism provided by the present invention, the transmission mechanism further includes an annular retaining plate, which is coaxially arranged on the wheel hub unit and is detachably connected to the end of the flange plate assembly facing away from the brake disc. The inner side wall of the annular retaining plate is connected to the outer peripheral side of the wheel hub unit.

[0011] As a preferred embodiment of the transmission mechanism provided by the present invention, a ring groove is formed on the outer peripheral side of the hub unit, and a part of the annular retaining plate is embedded in the ring groove.

[0012] As a preferred embodiment of the transmission mechanism provided by the present invention, a retaining plate connection hole is formed on the annular retaining plate, a flange connection hole is formed on the flange assembly, and a brake disc connection hole is formed on the brake disc. The retaining plate connection hole, the flange connection hole, and the brake disc connection hole are communicated in sequence; the transmission mechanism further includes a connecting bolt, and the connecting bolt sequentially passes through the retaining plate connection hole, the flange connection hole, and the brake disc connection hole.

[0013] As a preferred embodiment of the transmission mechanism provided by the present invention, the annular retaining plate includes two semi-circular retaining plates, and the corresponding ends of the two semi-circular retaining plates are in contact with each other.

[0014] As a preferred embodiment of the transmission mechanism provided by the present invention, a limiting ring is fixedly arranged inside the flange assembly. The limiting ring is arranged side by side on the side of the first spline portion away from the second spline portion, and the limiting ring is configured to cooperate with the outer peripheral side of the hub unit to radially limit the hub unit.

[0015] As a preferred embodiment of the transmission mechanism provided by the present invention, the transmission mechanism further includes an annular sealing cover. The annular sealing cover is coaxially arranged outside the hub unit. The inner side of the annular sealing cover abuts against the outer peripheral side of the hub unit, and the outer side portion of the annular sealing cover abuts against the inner wall of the wheel side reducer housing.

[0016] As a preferred embodiment of the transmission mechanism provided by the present invention, the transmission mechanism further includes a first sealing member and a second sealing member. The first sealing member is clamped between the annular sealing cover and the wheel side reducer housing, and the second sealing member is clamped between the annular sealing cover and the hub unit.

[0017] According to another aspect of the present invention, an object is to provide a disc type drive axle assembly. The disc type drive axle assembly further includes a ring gear support, a ring gear, and the transmission mechanism according to any one of the above solutions. The ring gear support is coaxially arranged on the axle head and is arranged side by side with the transmission mechanism. The ring gear is provided with a spline hole, and a support spline is arranged on the outer side of the ring gear support, and the support spline is in mating connection with the spline hole.

[0018] As a preferred embodiment of the disc type drive axle assembly provided by the present invention, the disc type drive axle assembly further includes a planet carrier. The planet carrier is coaxially arranged on the axle head, is spaced from the end of the axle head, and is connected to the wheel side reducer housing.

[0019] According to another aspect of the present invention, an object is to provide a vehicle, which includes the disc drive axle assembly according to any one of the above solutions.

[0020] Advantages of the present invention:

[0021] The transmission mechanism provided by the present invention is configured to be coaxially mounted on the axle head of the disc drive axle assembly and connected to the wheel side reducer housing. The transmission mechanism includes a hub unit, a flange assembly, and a brake disc. The hub unit is coaxially arranged outside the axle head; the flange assembly is coaxially arranged outside the hub unit, the brake disc is coaxially arranged outside the axle head and is detachably connected to the flange assembly, and a part of the hub unit extends into the brake disc. A first spline portion is arranged on the inner side of the flange assembly, and a second spline portion is arranged on the inner side of the brake disc. Through the cooperation connection between the first spline portion and the second spline portion and the outer peripheral side of the hub unit, the transmission of torque can be realized. When it is necessary to disassemble the brake disc, first release the connection between the brake disc and the flange assembly, then disassemble the flange assembly from the hub unit along the axial direction of the axle head, and then disassemble the brake disc from the hub unit along the axial direction of the axle head. During the whole disassembly process, the hub unit always maintains its original state and is connected to the axle head without disassembly. Thus, it effectively avoids the adverse effects on the service life and sealing performance of the hub unit when disassembling the brake disc. Description of the drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0023] Figure 1 is a partial structural schematic diagram of the disc drive axle assembly provided by the embodiment of the present invention;

[0024] Figure 2 is Figure 1 a partial enlarged view of the structure marked as A in;

[0025] Figure 3 is a partial cross-sectional view of the flange assembly provided by the embodiment of the present invention;

[0026] Figure 4 is a partial cross-sectional view of the hub unit provided by the embodiment of the present invention;

[0027] Figure 5 is a structural schematic diagram of the semi-circular retaining ring provided by the embodiment of the present invention.

[0028] In the figure:

[0029] 10. Axle head; 11. Nut; 12. Cylindrical pin; 13. Head-end spline; 20. Wheel side reducer housing; 30. Ring gear support; 31. First snap ring; 32. Second snap ring; 33. Needle roller bearing unit; 40. Ring gear; 41. Ring gear shim; 42. First connecting bolt; 50. Planet carrier; 60. Second connecting bolt;

[0030] 100. Hub unit; 110. Ring groove; 120. Third spline portion;

[0031] 200. Flange assembly; 210. First spline portion; 220. Flange connection hole; 230. Limiting ring; 240. Flange screw hole; 250. Weld seam;

[0032] 300. Brake disc; 310. Second spline portion;

[0033] 400. Annular shim; 410. Shim connection hole; 420. Semi-circular ring shim;

[0034] 500. Connecting bolt;

[0035] 600. Annular seal cover;

[0036] 710. First seal; 720. Second seal. Detailed implementation mode

[0037] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0038] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include contact between the first and second features not directly but through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0040] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", "left", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0042] This embodiment provides a transmission mechanism, a disc drive axle assembly, and a vehicle. The vehicle includes the disc drive axle assembly provided in this embodiment.

[0043] Figure 1 A partial structural schematic diagram of the disc drive axle assembly provided by the embodiment of the present invention is shown; Figure 2 Shown Figure 1 A partial enlarged view of the structure marked A in. Refer to Figure 1 And Figure 2 The disc drive axle assembly includes the transmission mechanism provided in this embodiment.

[0044] Specifically, the disc drive axle assembly includes an axle head 10, a wheel side reducer housing 20, a ring gear bracket 30, a ring gear 40, a planet carrier 50, and the transmission mechanism provided in this embodiment.

[0045] Refer to Figure 1, the ring gear bracket 30 is coaxially arranged on the outside of the shaft head 10, and is arranged side by side with the transmission mechanism. The ring gear 40 is provided with a ring gear spline hole, and the outer side of the ring gear bracket 30 is provided with a bracket spline, and the bracket spline is matched and connected to the ring gear spline hole. A part of the front section of the shaft head 10 is provided with a threaded section, and a nut 11 is screwed on the outside of the threaded section. A circular hole is provided on the nut 11 in a direction parallel to the axis of the shaft head 10, and one end of the cylindrical pin 12 is inserted into the above-mentioned circular hole, and the other end is inserted into the blind hole of the ring gear bracket 30. The head end of the shaft head 10 is ringed with a head end spline 13 on the outer side, and the ring gear bracket 30 is coaxially sleeved on the outer side of the head end spline 13, and the bracket spline hole in the ring gear bracket 30 is matched with the head end spline 13.

[0046] Further, continue to refer to Figure 1 The gear ring 40 is provided with a gear ring groove, in which a gear ring stopper 41 is embedded. The gear ring stopper 41 is connected to the gear ring bracket 30 through a first connecting bolt 42 .

[0047] Further, continue to refer to Figure 1 The planet carrier 50 is coaxially arranged on the shaft head 10, spaced apart from the end of the shaft head 10, and connected to the wheel reducer housing 20. Specifically, a first retaining ring 31 and a second retaining ring 32 are arranged around the step structure position of the head of the ring gear support 30, and the first retaining ring 31 and the second retaining ring 32 are spaced apart along the axial direction of the shaft head 10, and a needle bearing unit 33 is sandwiched between the two.

[0048] Figure 3 A partial cross-sectional view of a flange assembly provided by an embodiment of the present invention is shown. Figures 1-3 The transmission mechanism provided in this embodiment is coaxially mounted on the outer peripheral side of the shaft head 10 and connected to the wheel reducer housing 20. The transmission mechanism includes a coaxially arranged wheel hub unit 100, a flange assembly 200 and a brake disc 300.

[0049] Specifically, the hub unit 100 is coaxially arranged on the outer side of the shaft head 10. The flange assembly 200 is coaxially arranged on the outer side of the hub unit 100, and the wheel-side reducer housing 20 is detachably connected to the flange assembly 200. The flange assembly 200 is provided with a flange screw hole 240, and the second connecting bolt 60 is screwed into the flange screw hole 240 and the reducer housing screw hole of the wheel-side reducer housing 20 from the side of the flange assembly 200 away from the wheel-side reducer housing 20, so as to realize the detachable connection between the wheel-side reducer housing 20 and the flange assembly 200.

[0050] Specifically, the brake disc 300 is coaxially arranged outside the shaft head 10, and is arranged in sequence with the flange assembly 200 along the length direction of the shaft head 10, and is detachably connected to the flange assembly 200. A first spline portion 210 is arranged inside the flange assembly 200; a second spline portion 310 is arranged inside the brake disc 300, and the second spline portion 310 is connected to the first spline portion 210 side by side along the length direction of the shaft head 10; and a third spline portion 120 is arranged on the outer peripheral side of the hub unit 100. The first spline portion 210 is matched and connected to a part of the third spline portion 120, a part of the hub unit 100 extends into the brake disc 300, and another part of the third spline portion 120 is matched and connected to the second spline portion 310. Through the above arrangement, the torque can be transmitted through the cooperation of the third spline portion 120 with the first spline portion 210 and the second spline portion 310.

[0051] More specifically, a limiting ring 230 is fixedly disposed inside the flange assembly 200, the limiting ring 230 is disposed side by side on the side of the first spline portion 210 away from the second spline portion 310, and is welded to the flange assembly 200 to form a weld 250. The limiting ring 230 is configured to cooperate with the outer peripheral side of the hub unit 100 to radially limit the hub unit 100.

[0052] Figure 4 A partial cross-sectional view of a hub unit provided by an embodiment of the present invention is shown. Figure 5 FIG. 2 is a schematic diagram showing the structure of a semicircular ring baffle provided by an embodiment of the present invention. Figure 1 , Figure 2 , Figure 4 and Figure 5 The transmission mechanism further includes an annular baffle 400. The annular baffle 400 includes two semicircular baffles 420, and the corresponding ends of the two semicircular baffles 420 abut against each other. The annular baffle 400 is coaxially arranged on the wheel hub unit 100, and is detachably connected to the end of the flange assembly 200 away from the brake disc 300, and the inner side wall of the annular baffle 400 is connected to the outer peripheral side of the wheel hub unit 100. An annular groove 110 is provided on the outer peripheral side of the wheel hub unit 100, and the annular baffle 400 is partially embedded in the annular groove 110. The annular baffle 400 is used to limit the axial position of the flange assembly 200 and the brake disc 300.

[0053] Specifically, refer to Figure 5, the annular retaining plate 400 is provided with a plurality of retaining plate connection holes 410 along the circumferential direction, the flange assembly 200 is provided with a plurality of flange connection holes 220 along the circumferential direction, and the brake disc 300 is provided with brake disc connection holes along the circumferential direction. The retaining plate connection holes 410, the flange connection holes 220, and the brake disc connection holes correspond to each other one by one, and the corresponding retaining plate connection holes 410, flange connection holes 220, and brake disc connection holes are communicated in sequence. The transmission mechanism further includes a connecting bolt 500, the connecting bolt 500 is provided with an external thread, the connecting bolt 500 sequentially passes through the retaining plate connection hole 410 and the flange connection hole 220, and is screwed into the brake disc connection hole.

[0054] Continue to refer to Figure 1 and Figure 2 , the transmission mechanism further includes an annular sealing cover 600. The annular sealing cover 600 is coaxially arranged outside the hub unit 100, the inner side of the annular sealing cover 600 abuts against the outer peripheral side of the hub unit 100, and the outer side portion of the annular sealing cover 600 abuts against the inner wall of the wheel side reducer housing 20. The annular sealing cover 600 can seal the gear oil in the inner cavity of the wheel side reducer housing 20 to prevent the gear oil from leaking.

[0055] Preferably, the transmission mechanism further includes a first sealing member 710 and a second sealing member 720. The first sealing member 710 is clamped between the annular sealing cover 600 and the wheel side reducer housing 20, and the second sealing member 720 is clamped between the annular sealing cover 600 and the hub unit 100. The side of the annular sealing cover 600 facing the wheel side reducer housing 20 is provided with a first sealing groove, and the first sealing member 710 is embedded in the first sealing groove and tightly abuts against the inner wall of the wheel side reducer housing 20. The side of the annular sealing cover 600 facing the hub unit 100 is provided with a second sealing groove, and the second sealing member 720 is embedded in the second sealing groove and tightly abuts against the outer side portion of the hub unit 100. In this embodiment, both the first sealing member 710 and the second sealing member 720 are rubber sealing rings. Through the first sealing member 710 and the second sealing member 720, the sealing performance of the annular sealing cover 600 for the inner cavity of the wheel side reducer housing 20 is further improved.

[0056] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A transmission mechanism, configured to be coaxially mounted on a stub axle (10) of a disc drive axle assembly and connected to a wheel side reducer housing (20), characterized in that, Including: A hub unit (100) coaxially disposed outside the axle head (10); A flange assembly (200) coaxially disposed outside the hub unit (100). A first spline portion (210) is provided inside the flange assembly (200), and the first spline portion (210) is connected in a mating manner to the outer peripheral side of the hub unit (100). The wheel side reducer housing (20) is detachably connected to the flange assembly (200); A brake disc (300) coaxially disposed outside the axle head (10), arranged in sequence with the flange assembly (200) along the length direction of the axle head (10), and detachably connected to the flange assembly (200). A part of the hub unit (100) extends into the brake disc (300). A second spline portion (310) is provided inside the brake disc (300), and the second spline portion (310) is connected in a mating manner to a part of the hub unit (100). The second spline portion (310) is arranged side by side and connected to the first spline portion (210) along the length direction of the axle head (10); The transmission mechanism further includes an annular retaining plate (400) coaxially disposed on the hub unit (100) and detachably connected to the end of the flange assembly (200 facing away from the brake disc (300)). The inner side wall of the annular retaining plate (400) is connected to the outer peripheral side of the hub unit (100); The annular retaining plate (400) is provided with a retaining plate connection hole (410), the flange assembly (200) is provided with a flange connection hole (220), and the brake disc (300) is provided with a brake disc connection hole. The retaining plate connection hole (410), the flange connection hole (220), and the brake disc connection hole are sequentially communicated. The transmission mechanism further includes a connecting bolt (500) sequentially passing through the retaining plate connection hole (410), the flange connection hole (220), and the brake disc connection hole; 2. The transmission mechanism according to claim 1, wherein, A ring groove (110) is provided on the outer peripheral side of the hub unit (100), and a part of the annular retaining plate (400) is embedded in the ring groove (110); 3. The transmission mechanism according to claim 1, characterized in that, The annular retaining plate (400) includes two semi - annular retaining plates (420), and the corresponding ends of the two semi - annular retaining plates (420) are in contact with each other; 4. The transmission mechanism according to claim 1, characterized in that, A limiting ring (230) is fixedly provided inside the flange assembly (200), arranged side by side on the side of the first spline portion (210) facing away from the second spline portion (310). The limiting ring (230) is configured to cooperate with the outer peripheral side of the hub unit (100) to radially limit the hub unit (100).

5. The transmission mechanism according to claim 1, characterized in that, The transmission mechanism further includes an annular seal cover (600). The annular seal cover (600) is coaxially arranged outside the hub unit (100). The inner side of the annular seal cover (600) abuts against the outer peripheral side of the hub unit (100), and the outer side part of the annular seal cover (600) abuts against the inner wall of the wheel side speed reducer housing (20).

6. The transmission mechanism according to claim 5, wherein, The transmission mechanism further includes a first seal (710) and a second seal (720). The first seal (710) is clamped between the annular seal cover (600) and the wheel side speed reducer housing (20), and the second seal (720) is clamped between the annular seal cover (600) and the hub unit (100).

7. Disc drive axle assembly, including axle head (10) and wheel side reducer housing (20), characterized in that, The disc drive axle assembly further includes a ring gear bracket (30), a ring gear (40), and the transmission mechanism according to any one of claims 1-6. The ring gear bracket (30) is coaxially arranged on the axle head (10) and is arranged side by side with the transmission mechanism. The ring gear (40) is provided with a spline hole, and a bracket spline is arranged on the outer side of the ring gear bracket (30), and the bracket spline is connected to the spline hole in a mating manner; The disc drive axle assembly further includes a planet carrier (50). The planet carrier (50) is coaxially arranged on the axle head (10), is spaced from the end of the axle head (10), and is connected to the wheel side speed reducer housing (20).

8. A vehicle, characterized in that, Including the disc drive axle assembly according to claim 7.

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