CN116118395A

CN116118395A - Transmission mechanism, disc drive axle assembly and vehicle

Info

Publication number: CN116118395A
Application number: CN202310271684.8A
Authority: CN
Inventors: 冯涛; 王浩
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-05-16

Abstract

The invention belongs to the technical field of vehicles, and discloses a transmission mechanism, a disc-type drive axle assembly and a vehicle, wherein the transmission mechanism comprises a hub unit, a flange disc assembly and a brake disc; the hub unit is coaxially arranged outside the shaft head; the flange plate assembly is coaxially arranged outside the hub unit, a first spline part is arranged on the inner side of the flange plate assembly and is connected to the outer peripheral side of the hub unit in a matched mode, and the hub reduction gear shell is detachably connected to the flange plate assembly; the brake disc is coaxially arranged outside the shaft head, is sequentially arranged with the flange plate assembly along the length direction of the shaft head and is detachably connected with the flange plate assembly, one part of the hub unit stretches into the brake disc, the inner side of the brake disc is provided with a second spline part, the second spline part is matched and connected with part of the hub unit, and the second spline part is connected with the first spline part side by side along the length direction of the shaft head. When the brake disc is disassembled and replaced, the hub unit is not required to be disassembled from the axle head, and the service life and the sealing performance of the hub unit are further prevented from being influenced.

Description

Transmission mechanism, disc drive axle assembly and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a transmission mechanism, a disc drive axle assembly and a vehicle.

Background

A transaxle is a mechanism located at the end of the drive train that can vary the rotational speed and torque from the transmission and transmit them to the drive wheels. When the brake disc is dismounted and replaced, the hub of the existing disc drive axle needs to be dismounted at the same time. When the hub is disassembled, the service life of the hub bearing can be reduced, and the sealing performance of the hub oil seal is affected.

Accordingly, there is a need for a transmission, a disc drive axle assembly and a vehicle that solve the above problems.

Disclosure of Invention

According to one aspect of the present invention, it is an object to provide a transmission mechanism which does not require the hub unit to be detached from the axle head when the brake disc is detached and replaced, thereby avoiding affecting the service life and sealing performance of the hub unit.

To achieve the purpose, the invention adopts the following technical scheme:

a transmission configured to be coaxially mounted to a stub shaft of a disc drive axle assembly and connected to a hub reduction gear housing, the transmission comprising:

the hub unit is coaxially arranged outside the shaft head;

the flange plate assembly is coaxially arranged outside the hub unit, a first spline part is arranged on the inner side of the flange plate assembly and is connected to the outer peripheral side of the hub unit in a matched mode, and the hub reduction gear shell is detachably connected to the flange plate assembly;

the brake disc is coaxially arranged outside the shaft head, is sequentially arranged along the length direction of the shaft head and the flange plate assembly, and is detachably connected with the flange plate assembly, one part of the hub unit stretches into the brake disc, a second spline part is arranged on the inner side of the brake disc and is matched and connected with one part of the hub unit, and the second spline part is connected with the first spline part side by side along the length direction of the shaft head.

As the preferable scheme of the transmission mechanism provided by the invention, the transmission mechanism further comprises an annular baffle plate, wherein the annular baffle plate is coaxially arranged on the hub unit and detachably connected with the end part of the flange plate assembly, which is far away from the brake disc, and the inner side wall of the annular baffle plate is connected with the outer peripheral side of the hub unit.

As a preferable scheme of the transmission mechanism provided by the invention, an annular groove is formed in the outer peripheral side of the hub unit, and the annular baffle part is embedded in the annular groove.

As the preferable scheme of the transmission mechanism provided by the invention, the annular baffle plate is provided with a baffle plate connecting hole, the flange plate assembly is provided with a flange connecting hole, the brake plate is provided with a brake plate connecting hole, and the baffle plate connecting hole, the flange connecting hole and the brake plate connecting hole are sequentially communicated; the transmission mechanism further comprises a connecting bolt, and the connecting bolt sequentially penetrates through the baffle plate connecting hole, the flange connecting hole and the brake disc connecting hole.

As the preferable scheme of the transmission mechanism provided by the invention, the annular baffle plate comprises two semicircular baffle plates, and the corresponding end parts of the two semicircular baffle plates are mutually abutted.

As the preferable scheme of the transmission mechanism provided by the invention, the inner side of the flange plate assembly is fixedly provided with the limiting rings, the limiting rings are arranged on one side of the first spline part, which is away from the second spline part, side by side, and the limiting rings are configured to be matched with the outer peripheral side of the hub unit, so as to radially limit the hub unit.

As a preferable mode of the transmission mechanism provided by the invention, the transmission mechanism further comprises an annular sealing cover, wherein the annular sealing cover is coaxially arranged outside the hub unit, the inner side of the annular sealing cover is abutted against the outer peripheral side of the hub unit, and the outer side of the annular sealing cover is abutted against the inner wall of the hub reduction gear shell.

As a preferable scheme of the transmission mechanism provided by the invention, the transmission mechanism further comprises a first sealing element and a second sealing element, wherein the first sealing element is clamped between the annular sealing cover and the hub reduction gear shell, and the second sealing element is clamped between the annular sealing cover and the hub unit.

According to still another aspect of the present invention, it is an object to provide a disc drive axle assembly, where the disc drive axle assembly further includes a ring gear support, a ring gear, and a transmission mechanism according to any of the foregoing solutions, the ring gear support is coaxially disposed on the axle head and is disposed side by side with the transmission mechanism, the ring gear is provided with a spline hole, and a support spline is disposed on an outer side of the ring gear support, and the support spline is cooperatively connected to the spline hole.

As the preferable scheme of the disc drive axle assembly provided by the invention, the disc drive axle assembly further comprises a planet carrier, wherein the planet carrier is coaxially arranged on the shaft head, is arranged at intervals with the end part of the shaft head, and is connected with the wheel-side reducer shell.

According to a further aspect of the present invention, it is an object to provide a vehicle comprising a disc drive axle assembly according to any one of the above aspects.

The invention has the beneficial effects that:

the transmission mechanism provided by the invention is configured to be coaxially mounted on a spindle nose of a disc drive axle assembly and connected to a hub reduction gear shell. The transmission mechanism comprises a hub unit, a flange plate assembly and a brake disc. The hub unit is coaxially arranged outside the shaft head; the flange plate assembly is coaxially arranged outside the hub unit, the brake disc is coaxially arranged outside the shaft head and detachably connected with the flange plate assembly, and a part of the hub unit stretches into the brake disc. The inner side of the flange plate assembly is provided with a first spline part, the inner side of the brake disc is provided with a second spline part, and torque transmission can be realized through the matched connection of the first spline part and the second spline part with the outer peripheral side of the hub unit. When the brake disc needs to be disassembled, the connection between the brake disc and the flange disc assembly is firstly released, then the flange disc assembly is disassembled from the hub unit along the axial direction of the shaft head, and then the brake disc is disassembled from the hub unit along the axial direction of the shaft head. And further, adverse effects on the service life and the sealing performance of the hub unit when the brake disc is detached are effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a portion of a disc drive axle assembly according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the structure labeled A in FIG. 1;

FIG. 3 is a partial cross-sectional view of a flange assembly provided in an embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of a hub unit provided by an embodiment of the present invention;

fig. 5 is a schematic structural view of a semicircular baffle according to an embodiment of the present invention.

In the figure:

10. a shaft head; 11. a nut; 12. a cylindrical pin; 13. a head end spline; 20. wheel-side reducer housing; 30. a ring gear support; 31. a first retainer ring; 32. the second check ring; 33. a needle bearing unit; 40. a gear ring; 41. gear ring baffle; 42. a first connecting bolt; 50. a planet carrier; 60. a second connecting bolt;

100. a hub unit; 110. a ring groove; 120. a third spline portion;

200. a flange plate assembly; 210. a first spline portion; 220. a flange connection hole; 230. a limiting ring; 240. a flange screw hole; 250. welding seams;

300. a brake disc; 310. a second spline portion;

400. an annular baffle; 410. a baffle plate connecting hole; 420. a semicircular baffle plate;

500. a connecting bolt;

600. an annular seal cap;

710. a first seal; 720. and a second seal.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

The 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.

FIG. 1 is a schematic view of a portion of a disc drive axle assembly according to an embodiment of the present invention; fig. 2 shows a partial enlarged view of the structure marked a in fig. 1. Referring to fig. 1 and 2, the disc drive axle assembly includes a transmission mechanism provided by the present embodiment.

Specifically, the disc drive axle assembly includes a stub shaft 10, a hub reduction gear housing 20, a ring gear carrier 30, a ring gear 40, a planet carrier 50, and a transmission mechanism provided in the present embodiment.

Referring to fig. 1, the ring gear carrier 30 is coaxially disposed outside the shaft head 10, and is disposed side by side with the transmission mechanism. The ring gear 40 is provided with a ring gear splined hole, and the outer side of the ring gear carrier 30 is provided with carrier splines which are cooperatively connected to the ring gear splined hole. A part of the front section of the shaft head 10 is provided with a thread section, the outside of the thread section is screwed with a nut 11, a round hole is formed in the nut 11 along the direction parallel to the axis of the shaft head 10, one end of the cylindrical pin 12 is inserted into the round hole, and the other end is inserted into a blind hole of the gear ring bracket 30. The head end spline 13 is annularly arranged outside the head end circumference side of the shaft head 10, the gear ring support 30 is coaxially sleeved on the outer side of the head end spline 13, and a support spline hole in the gear ring support 30 is matched with the head end spline 13.

Further, with continued reference to fig. 1, the ring gear 40 is annularly provided with a ring gear annular groove in which the ring gear baffle 41 is embedded. The ring gear blade 41 is connected to the ring gear carrier 30 by a first connecting bolt 42.

Further, with continued reference to fig. 1, the planet carrier 50 is coaxially disposed about the axle head 10, spaced from the end of the axle head 10, and connected to the wheel-side reducer housing 20. Specifically, the stepped structure of the head of the ring gear support 30 is provided with a first retainer ring 31 and a second retainer ring 32, the first retainer ring 31 and the second retainer ring 32 are arranged at intervals along the axial direction of the shaft head 10, and a needle bearing unit 33 is arranged between the first retainer ring and the second retainer ring.

FIG. 3 illustrates a partial cross-sectional view of a flange assembly provided by an embodiment of the present invention. Referring to fig. 1 to 3, the transmission mechanism provided in the present embodiment is coaxially installed at the outer circumferential side of the stub shaft 10 and is connected to the hub reduction gear case 20. The transmission mechanism includes a hub unit 100, a flange plate assembly 200, and a brake disc 300 coaxially disposed.

Specifically, the hub unit 100 is coaxially disposed outside the circumference of the stub shaft 10. The flange plate assembly 200 is coaxially disposed outside the hub unit 100, and the hub reduction gear case 20 is detachably connected to the flange plate assembly 200. The flange plate assembly 200 is provided with a flange screw hole 240, and one side of the second connecting bolt 60, which is away from the wheel-side speed reducer shell 20, of the flange plate assembly 200 is in threaded connection with the flange screw hole 240 and the speed reducer shell screw hole of the wheel-side speed reducer shell 20, so that the detachable connection between the wheel-side speed reducer shell 20 and the flange plate assembly 200 is realized.

More specifically, the brake disc 300 is coaxially disposed outside the shaft head 10, sequentially disposed along the length direction of the shaft head 10 with the flange assembly 200, and detachably connected with the flange assembly 200. A first spline portion 210 is provided inside the flange plate assembly 200; a second spline portion 310 is disposed on the inner side of the brake disc 300, and the second spline portion 310 is engaged with the first spline portion 210 side by side along the length direction of the spindle head 10; the hub unit 100 is provided with a third spline portion 120 on the outer peripheral side. The first spline portion 210 is cooperatively coupled to a portion of the third spline portion 120, a portion of the hub unit 100 extends into the brake disc 300, and another portion of the third spline portion 120 is cooperatively coupled to the second spline portion 310. With the above arrangement, torque can be transmitted by the engagement of the third spline portion 120 with the first spline portion 210 and the second spline portion 310.

More specifically, a stop ring 230 is fixedly disposed on the inner side of the flange assembly 200, and the stop ring 230 is disposed side by side on the side of the first spline portion 210 facing away from the second spline portion 310, and is welded to the flange assembly 200 to form a weld 250. The stopper ring 230 is configured to be fitted to the outer circumferential side of the hub unit 100, radially stopping the hub unit 100.

Fig. 4 is a partial cross-sectional view of a hub unit according to an embodiment of the present invention, and fig. 5 is a schematic structural view of a semicircular ring baffle according to an embodiment of the present invention. Referring to fig. 1, 2, 4 and 5, the transmission further includes an annular flap 400. The annular baffle 400 includes two semicircular baffle plates 420, and the corresponding end portions of the two semicircular baffle plates 420 are abutted against each other. The annular baffle 400 is coaxially disposed on the hub unit 100 and detachably connected to an end of the flange assembly 200 facing away from the brake disc 300, and an inner sidewall of the annular baffle 400 is connected to an outer circumferential side of the hub unit 100. The outer circumferential side of the hub unit 100 is provided with a ring groove 110, and the annular baffle 400 is partially embedded in the ring groove 110. The annular flap 400 is used to limit the axial position of the flange assembly 200 and the brake disc 300.

Specifically, referring to fig. 5, the annular rib 400 is provided with a plurality of rib coupling holes 410 in a circumferential direction, the flange plate assembly 200 is provided with a plurality of flange coupling holes 220 in a circumferential direction, and the brake disc 300 is provided with a brake disc coupling hole in a circumferential direction. The baffle connection holes 410, the flange connection holes 220 and the brake disc connection holes are in one-to-one correspondence, and the corresponding baffle connection holes 410, flange connection holes 220 and brake disc connection holes are sequentially communicated. The transmission mechanism further comprises a connecting bolt 500, wherein the connecting bolt 500 is provided with external threads, and the connecting bolt 500 sequentially penetrates through the baffle connecting hole 410 and the flange connecting hole 220 and is screwed into the brake disc connecting hole.

With continued reference to fig. 1 and 2, the transmission further includes an annular seal housing 600. The annular seal cover 600 is coaxially disposed 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 of the annular seal cover 600 abuts against the inner wall of the hub reduction gear case 20. The annular sealing cover 600 can seal gear oil in the inner cavity of the hub reduction gear case 20 to prevent the gear oil from leaking.

Preferably, the transmission further comprises a first seal 710 and a second seal 720. The first seal 710 is sandwiched between the annular seal cover 600 and the hub reduction gear case 20, and the second seal 720 is sandwiched between the annular seal cover 600 and the hub unit 100. The annular sealing cover 600 is provided with a first sealing groove on the side opposite to the hub reduction gear shell 20, and the first sealing piece 710 is embedded in the first sealing groove and tightly abuts against the inner wall of the hub reduction gear shell 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 of the hub unit 100. In this embodiment, the first seal 710 and the second seal 720 are rubber seals. The sealing performance of the annular seal cover 600 to the inner cavity of the hub reduction gear case 20 is further improved by the first seal 710 and the second seal 720.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A transmission configured to be coaxially mounted to a stub shaft (10) of a disc drive axle assembly and to be connected to a hub reduction gear housing (20), characterized by comprising:

a hub unit (100), wherein the hub unit (100) is coaxially arranged outside the shaft head (10);

the flange plate assembly (200), the flange plate assembly (200) is coaxially arranged outside the hub unit (100), a first spline part (210) is arranged on the inner side of the flange plate assembly (200), the first spline part (210) is connected to the outer peripheral side of the hub unit (100) in a matching way, and the hub reduction gear shell (20) is detachably connected to the flange plate assembly (200);

brake disc (300), brake disc (300) coaxial set up in spindle nose (10) is outside, follows the length direction of spindle nose (10) with flange dish assembly (200) set gradually, and with flange dish assembly (200) can dismantle and be connected, part of wheel hub unit (100) stretches into brake disc (300), brake disc (300) inboard sets up second spline portion (310), second spline portion (310) cooperation connect in part wheel hub unit (100), second spline portion (310) follow the length direction of spindle nose (10) link up side by side in first spline portion (210).

2. The transmission mechanism according to claim 1, further comprising an annular baffle (400), wherein the annular baffle (400) is coaxially disposed on the hub unit (100) and detachably connected to an end portion of the flange plate assembly (200) facing away from the brake disc (300), and an inner side wall of the annular baffle (400) is connected to an outer peripheral side of the hub unit (100).

3. The transmission mechanism according to claim 2, wherein an annular groove (110) is formed in the outer peripheral side of the hub unit (100), and the annular baffle (400) is partially embedded in the annular groove (110).

4. The transmission mechanism according to claim 2, wherein the annular baffle (400) is provided with a baffle connection hole (410), the flange plate assembly (200) is provided with a flange connection hole (220), the brake plate (300) is provided with a brake plate connection hole, and the baffle connection hole (410), the flange connection hole (220) and the brake plate connection hole are sequentially communicated; the transmission mechanism further comprises a connecting bolt (500), and the connecting bolt (500) sequentially penetrates through the baffle plate connecting hole (410), the flange connecting hole (220) and the brake disc connecting hole.

5. The transmission mechanism according to claim 2, wherein the annular baffle (400) comprises two semicircular baffle plates (420), and corresponding end portions of the two semicircular baffle plates (420) are abutted against each other.

6. The transmission mechanism according to claim 1, wherein a limiting ring (230) is fixedly arranged on the inner side of the flange plate assembly (200), the limiting rings (230) are arranged on one side of the first spline portion (210) away from the second spline portion (310) side by side, and the limiting rings (230) are configured to be matched with the outer peripheral side of the hub unit (100) to radially limit the hub unit (100).

7. The transmission mechanism according to claim 1, further comprising an annular seal cover (600), the annular seal cover (600) being coaxially disposed outside the hub unit (100), an inner side of the annular seal cover (600) being abutted against an outer peripheral side of the hub unit (100), an outer side of the annular seal cover (600) being abutted against an inner wall of the hub reduction gear case (20).

8. The transmission mechanism according to claim 7, further comprising a first seal (710) and a second seal (720), the first seal (710) being sandwiched between the annular seal cover (600) and the hub reduction gear casing (20), the second seal (720) being sandwiched between the annular seal cover (600) and the hub unit (100).

9. The disc drive axle assembly comprises a shaft head (10) and a hub reduction gear shell (20), and is characterized by further comprising a gear ring support (30), a gear ring (40) and the transmission mechanism according to any one of claims 1-8, wherein the gear ring support (30) is coaxially arranged on the shaft head (10) and is arranged side by side with the transmission mechanism, the gear ring (40) is provided with a spline hole, the outer side of the gear ring support (30) is provided with a support spline, and the support spline is connected to the spline hole in a matched manner.

10. The disc drive axle assembly of claim 9, further comprising a planet carrier (50), the planet carrier (50) being coaxially disposed about the axle head (10), spaced from an end of the axle head (10), and connected to the hub reduction gear housing (20).

11. A vehicle comprising a disc drive axle assembly according to claim 9 or 10.