Drive axle swing mechanism and drive axle

Abstract

The utility model discloses a drive axle swing mechanism and a drive axle. The drive axle swing mechanism comprises an axle housing, a front swing arm assembly and a rear swing arm assembly. A bearing seat and a mounting seat are respectively arranged on the front side and the rear side of the axle housing; the key point of the utility model is that the rear swing arm assembly is connected to the mounting seat and comprises a rear bushing, a rear swing arm and a rear end cover, the rear end cover covers the rear end surface of the rear swing arm, an accommodating space is formed between the rear end cover and the rear swing arm, a baffle plate, a front thrust washer positioned on the front side of the baffle plate and a rear thrust washer positioned on the rear side of the baffle plate are arranged in the accommodating space, the baffle is fixedly connected with the mounting base, and a mounting gap is formed between the rear end face of the rear thrust washer and the front end face of the rear end cover, so that the displacement of the drive axle in the vehicle running process can be limited by controlling the thickness precision of the baffle, the front thrust washer and the rear thrust washer. The gap at the rear thrust washer can be adjusted without selecting an adjusting washer, so that the drive axle is easy to install.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a drive axle swing mechanism and a drive axle. Background Art

[0002] The driving axle of the engineering vehicle is installed on the frame through a swing mechanism, so that the wheels on both sides can swing around the central axis. When the vehicle passes through an obstacle, the wheels that have passed the obstacle can swing around the central axis to ensure that the vehicle body will not tilt, thereby improving driving safety.

[0003] The existing swing mechanism includes a bridge housing, a front swing arm, a rear swing arm and a rear end cover, a bearing seat is provided on the front side of the bridge housing, a mounting portion is provided on the rear side of the bridge housing, the front swing arm is sleeved on the bearing seat and a front thrust washer is installed on its end face, the rear swing arm is sleeved on the mounting portion, the rear end cover is covered on the rear end face of the rear swing arm and fixed by bolts, a rear thrust washer is installed between the front end of the rear end cover and the rear swing arm, and an adjustment gasket is installed between the rear end of the rear end cover and the rear end face of the rear swing arm; when the drive axle is installed on the frame, the front swing arm is first fixed to the frame by bolts, then the rear swing arm is fixedly connected to the frame by bolts, and an adjustment gasket of a certain thickness is selected according to the gap size required for installing the rear thrust washer, and then the selected adjustment gasket is installed on the rear end face of the rear swing arm and the front end face of the rear end cover to adjust the gap at the rear thrust washer, so as to limit the movement of the drive axle during the vehicle driving process. However, the gap at the above-mentioned rear thrust washer is not easy to adjust, which affects the working efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a drive axle swing mechanism and a drive axle. The drive axle swing mechanism is provided with a baffle in the accommodating space and a front thrust washer and a rear thrust washer are respectively provided on the front and rear sides of the baffle, so as to limit the movement of the drive axle during vehicle driving by controlling the thickness accuracy of the baffle, the front thrust washer and the rear thrust washer. There is no need to adjust the gap at the rear thrust washer by optional adjustment shims, so that the drive axle is easy to install, thereby improving work efficiency.

[0005] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0006] A drive axle swing mechanism, comprising an axle housing, a front swing arm assembly and a rear swing arm assembly;

[0007] A bearing seat is provided at the front side of the axle housing, and a mounting seat is provided at the rear side of the axle housing;

[0008] The front swing arm assembly is connected to the bearing seat, and comprises a front bushing sleeved on the outer peripheral wall of the bearing seat and a front swing arm sleeved on the outer peripheral wall of the front bushing;

[0009] The rear swing arm assembly is connected to the mounting seat, and includes a rear bushing sleeved on the outer peripheral wall of the mounting seat, a rear swing arm sleeved on the rear bushing, and a rear end cover. The rear end cover is covered on the rear end surface of the rear swing arm and a accommodating space is formed between the two. A baffle, a front thrust washer and a rear thrust washer are provided in the accommodating space. The baffle is fixedly connected to the mounting seat. The front thrust washer and the rear thrust washer are respectively located on the front side and the rear side of the baffle, and an installation gap is provided between the rear end surface of the rear thrust washer and the front end surface of the rear end cover.

[0010] Furthermore, the rear end surface of the mounting seat is concavely arranged forward to form an annular groove, and the front plate surface of the baffle is convexly extended forward to form an annular convex portion, and the convex portion cooperates with the groove.

[0011] Furthermore, the baffle is fixed to the rear end surface of the mounting seat by screws, and the front plate surface of the baffle is tightly fitted with the rear end surfaces of the mounting seat and the rear bushing.

[0012] Furthermore, the front thrust washer is sleeved on the rear bushing and is tightly fitted with the front end wall of the accommodating space and the front plate surface of the baffle.

[0013] Furthermore, the front end surface of the rear end cover protrudes forward corresponding to the rear end surface of the rear bushing to form an annular connecting portion, and there is a gap between the connecting portion and the rear plate surface of the baffle, and the rear thrust washer is sleeved on the connecting portion and its front end surface is in contact with the rear plate surface of the baffle.

[0014] Furthermore, the front swing arm has a front through hole, which is coaxial with the bearing hole of the bearing seat and is equipped with a first bushing inside, and the inner circumferential wall of the first bushing can be relatively slidably matched with the outer circumferential wall of the front bushing in the front and rear directions; the rear swing arm has a rear through hole, which is coaxial with the bearing hole and is equipped with a second bushing inside, and the inner circumferential wall of the second bushing can be relatively slidably matched with the outer circumferential wall of the rear bushing in the front and rear directions.

[0015] Furthermore, the inner circumferential walls of the first bushing and the second bushing are respectively provided with annular oil passages recessed outwardly along the circumferential direction thereof, and the inner circumferential walls of the first bushing and the second bushing are also recessed outwardly to form a plurality of oil storage grooves distributed along the circumferential direction thereof and located outside the oil passages, and the outer circumferential walls of the first bushing and the second bushing are respectively provided with oil holes inwardly opened to communicate with the oil passages.

[0016] Furthermore, a wear-resistant material layer is formed on the surface of the front bushing and the rear bushing, and the rear end outer peripheral wall of the front bushing and the front end outer peripheral wall of the rear bushing respectively protrude outward along the circumference thereof to form an annular front limiting portion and rear limiting portion, and the front limiting portion stops at the rear side of the front swing arm, and the rear limiting portion stops at the front side of the rear swing arm.

[0017] Furthermore, the outer peripheral wall of the bearing seat protrudes outward to form a rear positioning portion located on the rear side of the front limiting portion, and the rear positioning portion is fitted with the front limiting portion. The outer peripheral wall of the mounting seat is recessed inward to form an annular step portion, and the rear bushing is sleeved on the step portion and its rear limiting portion is fitted with the front side wall of the step portion; the front end cover of the front swing arm assembly is fixed to the front end surface of the front swing arm by screws, and the rear end cover is fixed to the rear end surface of the rear swing arm by screws.

[0018] The drive axle swing mechanism of the utility model is provided with a baffle in the accommodation space and a front thrust washer and a rear thrust washer are provided on the front and rear sides of the baffle respectively, the baffle is fixedly connected to the mounting seat, and there is an installation gap between the rear end face of the rear thrust washer and the front end face of the rear end cover, so that the movement of the drive axle during the driving process of the vehicle can be limited by controlling the thickness accuracy of the baffle, the front thrust washer and the rear thrust washer, and there is no need to adjust the gap at the rear thrust washer by optional adjustment washer, so that the drive axle is easy to install and the work efficiency is further improved. The drive axle swing mechanism of the utility model has the characteristics of simple structure and easy installation.

[0019] An embodiment of the utility model further provides a drive axle, comprising the drive axle swing mechanism described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional schematic diagram of the drive axle swing mechanism of the utility model embodiment when it is installed on the drive axle;

[0021] Figure 2 for Figure 1 AA direction cross-sectional view;

[0022] Figure 3 for Figure 2 A partial enlarged view of B;

[0023] Figure 4 for Figure 2 A partial enlarged view of C;

[0024] Figure 5 for Figure 1 A partial exploded perspective view of the front swing arm assembly;

[0025] Figure 6 for Figure 1 A partial exploded perspective view of the rear swing arm assembly. DETAILED DESCRIPTION

[0026] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0027] like Figures 1 to 6 As shown, the embodiment of the utility model provides a drive axle swing mechanism, which is applied to the drive axle 100 of the scraper, so that the two wheels of the drive axle 100 can swing around the central axis L. The drive axle swing mechanism includes an axle housing 1, a front swing arm assembly 2 and a rear swing arm assembly 3 (such as Figure 1 as shown).

[0028] like Figure 2 As shown, a bearing seat 11 is provided on the front side of the bridge housing 1, and the bearing seat 11 is fixed to the front side wall of the bridge housing 1 by bolts. A bearing (unnumbered) is installed in the bearing hole 111 of the bearing seat 11, and the main bevel gear 200 of the drive axle reducer cooperates with the bearing; a mounting seat 12 is provided on the rear side of the bridge housing 1, specifically, the rear side wall of the bridge housing 1 extends backward to form the mounting seat 12.

[0029] like Figure 2 , Figure 3 and Figure 5 As shown, the front swing arm assembly 2 is connected to the bearing seat 11, and includes a front bushing 21 sleeved on the outer peripheral wall of the bearing seat 11 and a front swing arm 22 sleeved on the outer peripheral wall of the front bushing 21. Specifically, the front swing arm 22 has a front through hole 221 located at the center thereof, the front through hole 221 is coaxial with the bearing hole 111 and a first bushing 222 is fitted inside thereof, and the inner peripheral wall of the first bushing 222 can be relatively slidably matched with the outer peripheral wall of the front bushing 21 in the front-rear direction, so that the drive axle 100 can move in the front-rear direction.

[0030] like Figure 2 , Figure 4 and Figure 6As shown, the rear swing arm assembly 3 is connected to the mounting seat 12, and includes a rear bushing 31 sleeved on the outer peripheral wall of the mounting seat 12, a rear swing arm 32 sleeved on the rear bushing 31, and a rear end cover 33 located at the rear of the mounting seat 12. Specifically, the rear swing arm 32 has a rear through hole 321 located at the center thereof, the rear through hole 321 is coaxial with the bearing hole 111 and a second bushing 322 is matched therein, and the inner peripheral wall of the second bushing 322 can be relatively slidably matched with the outer peripheral wall of the rear bushing 31 in the front-rear direction so that the drive axle 100 can move in the front-rear direction. The rear end cover 33 is covered on the rear end surface of the rear swing arm 32 and an accommodating space 34 is formed therebetween. A baffle plate 35, a front thrust washer 36 and a rear thrust washer 37 are arranged in the accommodating space 34. The baffle plate 35 is fixedly connected to the mounting seat 12. The front thrust washer 36 and the rear thrust washer 37 are respectively located at the front and rear sides of the baffle plate 35, and an installation gap 38 is provided between the rear end surface of the rear thrust washer 37 and the front end surface of the rear end cover 33. Thus, the amount of movement of the drive axle 100 during vehicle driving can be limited by controlling the thickness accuracy of the baffle plate 35, the front thrust washer 36 and the rear thrust washer 37. There is no need to adjust the gap at the rear thrust washer 37 by installing an optional adjustment washer, so that the drive axle 100 is easy to install, the work efficiency is further improved, and the structure is simple. When the drive axle 100 is installed on the vehicle frame, the front swing arm assembly 2 is first connected to the vehicle frame (not shown), that is, the front swing arm 22 is aligned with a mounting position of the frame and the two are fixed by bolts, and then the rear swing arm assembly 3 is connected to the vehicle frame, that is, the rear swing arm 32 is slid to align with another mounting position of the frame and the two are fixed by bolts.

[0031] like Figure 2 , Figure 4 As shown, the rear end surface of the mounting seat 12 is concavely formed forward to form an annular groove 121, and the front plate surface of the baffle 35 is convexly extended forward to form an annular convex portion 351, and the convex portion 351 cooperates with the groove 121 to accurately and stably position the baffle 35. In this embodiment, the baffle 35 is fixed to the rear end surface of the mounting seat 12 by screws, and the front plate surface of the baffle 35 is tightly fitted with the rear end surface of the mounting seat 12 and the rear bushing 31 to limit the driving axle 100 in the front-rear direction.

[0032] like Figure 2 , Figure 4As shown, the front end surface of the rear end cover 33 corresponds to the rear end surface of the rear bushing 31 and protrudes forward to form an annular connecting portion 331, and there is a gap between the connecting portion 331 and the rear plate surface of the baffle 35 to form a clearance space; the front thrust washer 36 is sleeved on the rear bushing 31 and is tightly fitted with the front end wall 341 of the accommodating space 34 and the front plate surface of the baffle 35, and the rear thrust washer 37 is sleeved on the connecting portion 331 and its front end surface is fitted with the rear plate surface of the baffle 35, and there is a gap between the outer peripheral wall of the front thrust washer 36 and the outer peripheral wall of the rear thrust washer 37 and the corresponding inner wall of the accommodating space 34 to form a clearance space; the design of the front thrust washer 36 and the rear thrust washer 37 can facilitate maintenance and replacement while limiting the drive axle 100 in the front and rear directions.

[0033] Figure 3 , Figure 4 and Figure 5 As shown, in order to improve the lubrication performance and extend the service life, the inner circumferential walls of the first bushing 222 and the second bushing 322 are respectively recessed with annular oil passages 4 along the circumference thereof, and the oil passages 4 are used to transport lubricating grease. The inner circumferential walls of the first bushing 222 and the second bushing 322 are also recessed outward to form a plurality of oil storage grooves 5 distributed along the circumference thereof and located outside the oil passages 4. The outer circumferential walls of the first bushing 222 and the second bushing 322 are respectively opened inward with oil holes 6 connected to the oil passages 4. When the lubricating grease is injected, the lubricating grease enters the oil storage grooves 5 from the oil holes 6 through the oil passages 4, thereby realizing the lubrication of the front swing arm assembly 2 and the rear swing arm assembly 3.

[0034] like Figure 3 , Figure 4 As shown, in order to improve wear resistance, the front bushing 21 and the rear bushing 31 are both subjected to QPQ composite treatment to form a wear-resistant material layer on their surfaces. In order to improve positioning accuracy, the rear end peripheral wall of the front bushing 21 and the front end peripheral wall of the rear bushing 31 protrude outward along their circumference to form an annular front limit portion 211 and a rear limit portion 311, respectively. The front limit portion 211 stops at the rear side of the front swing arm 22 to limit the forward movement of the drive axle 100.

[0035] like Figure 3 , Figure 4 As shown, in order to further improve the positioning accuracy, in the present embodiment, the outer peripheral wall of the bearing seat 11 protrudes outward to have a rear positioning portion 112 located on the rear side of the front limiting portion 211, the rear positioning portion 112 is fitted with the front limiting portion 211 to limit the rearward movement of the drive axle 100, the outer peripheral wall of the mounting seat 12 is recessed inward to form an annular step portion 122, the rear bushing 31 is sleeved on the step portion 122 and its rear limiting portion 311 is fitted with the front side wall 1221 of the step portion 122 to limit the forward movement of the rear bushing 31; the front end cover 23 of the front swing arm assembly 2 is fixed to the front end surface of the front swing arm 22 by screws, and the rear end cover 33 is fixed to the rear end surface of the rear swing arm 32 by screws.

[0036] The drive axle swing mechanism of the utility model is provided with a baffle in the accommodation space and a front thrust washer and a rear thrust washer are provided on the front and rear sides of the baffle respectively, the baffle is fixedly connected to the mounting seat, and there is an installation gap between the rear end face of the rear thrust washer and the front end face of the rear end cover, so that the movement of the drive axle during the driving process of the vehicle can be limited by controlling the thickness accuracy of the baffle, the front thrust washer and the rear thrust washer, and there is no need to adjust the gap at the rear thrust washer by optional adjustment washer, so that the drive axle is easy to install and the work efficiency is further improved. The drive axle swing mechanism of the utility model has the characteristics of simple structure and easy installation.

[0037] The utility model embodiment also provides a drive axle (such as Figure 1 As shown), including the drive axle swing mechanism described in any of the above embodiments.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. The drive axle swing mechanism is characterized by: It includes a bridge housing, a front swing arm assembly and a rear swing arm assembly; A bearing seat is provided at the front side of the axle housing, and a mounting seat is provided at the rear side of the axle housing; The front swing arm assembly is connected to the bearing seat, and comprises a front bushing sleeved on the outer peripheral wall of the bearing seat and a front swing arm sleeved on the outer peripheral wall of the front bushing; The rear swing arm assembly is connected to the mounting seat, and includes a rear bushing sleeved on the outer peripheral wall of the mounting seat, a rear swing arm sleeved on the rear bushing, and a rear end cover. The rear end cover is covered on the rear end surface of the rear swing arm and a accommodating space is formed between the two. A baffle, a front thrust washer and a rear thrust washer are provided in the accommodating space. The baffle is fixedly connected to the mounting seat. The front thrust washer and the rear thrust washer are respectively located on the front side and the rear side of the baffle, and an installation gap is provided between the rear end surface of the rear thrust washer and the front end surface of the rear end cover.

2. The drive axle swing mechanism according to claim 1, characterized in that: The rear end surface of the mounting seat is concavely arranged forward to form an annular groove, and the front plate surface of the baffle is convexly extended forward to form an annular convex portion, and the convex portion is matched with the groove.

3. The drive axle swing mechanism according to claim 1, characterized in that: The baffle is fixed to the rear end surface of the mounting seat by screws, and the front plate surface of the baffle is tightly fitted with the mounting seat and the rear end surface of the rear bushing.

4. The drive axle swing mechanism according to claim 1, characterized in that: The front thrust washer is sleeved on the rear bushing and is tightly fitted with the front end wall of the accommodating space and the front plate surface of the baffle.

5. The drive axle swing mechanism according to claim 1, characterized in that: The front end surface of the rear end cover corresponds to the rear end surface of the rear bushing and protrudes forward to form an annular connecting portion. There is a gap between the connecting portion and the rear plate surface of the baffle. The rear thrust washer is sleeved on the connecting portion and its front end surface is in contact with the rear plate surface of the baffle.

6. The drive axle swing mechanism according to claim 1, characterized in that: The front swing arm has a front through hole, which is coaxial with the bearing hole of the bearing seat and is equipped with a first bushing inside. The inner circumferential wall of the first bushing can be relatively slidably matched with the outer circumferential wall of the front bushing in the front and rear directions; the rear swing arm has a rear through hole, which is coaxial with the bearing hole and is equipped with a second bushing inside. The inner circumferential wall of the second bushing can be relatively slidably matched with the outer circumferential wall of the rear bushing in the front and rear directions.

7. The drive axle swing mechanism according to claim 6, characterized in that: The inner circumferential walls of the first bushing and the second bushing are respectively provided with annular oil passages recessed outwardly along the circumference thereof, and the inner circumferential walls of the first bushing and the second bushing are also recessed outwardly to form a plurality of oil storage grooves distributed along the circumference thereof and located outside the oil passages, and the outer circumferential walls of the first bushing and the second bushing are respectively provided with oil holes inwardly opened to communicate with the oil passages.

8. The drive axle swing mechanism according to claim 1, characterized in that: A wear-resistant material layer is formed on the surface of the front bushing and the rear bushing, and the rear end outer peripheral wall of the front bushing and the front end outer peripheral wall of the rear bushing respectively protrude outward along the circumference thereof to form an annular front limiting portion and rear limiting portion, the front limiting portion stops at the rear side of the front swing arm, and the rear limiting portion stops at the front side of the rear swing arm.

9. The drive axle swing mechanism according to claim 8, characterized in that: The outer peripheral wall of the bearing seat protrudes outward to form a rear positioning portion located on the rear side of the front limiting portion, and the rear positioning portion is fitted with the front limiting portion. The outer peripheral wall of the mounting seat is recessed inward to form an annular step portion, and the rear bushing is sleeved on the step portion and its rear limiting portion is fitted with the front side wall of the step portion; the front end cover of the front swing arm assembly is fixed to the front end surface of the front swing arm by screws, and the rear end cover is fixed to the rear end surface of the rear swing arm by screws.

10. The drive axle is characterized in that: It comprises a drive axle swing mechanism as described in any one of claims 1 to 9.

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