A drive axle assembly and vehicle

Abstract

The utility model belongs to vehicle drive axle technical field discloses a drive axle assembly and vehicle. The drive axle assembly includes the speed reducer shell, axle housing, differential shell, differential lock subassembly and differential switch, the speed reducer shell is provided with the first accommodating cavity, the axle housing and the speed reducer shell are detachably connected, the one end of axle housing is close to the speed reducer shell body and is provided with the recess; The differential shell is arranged in the first accommodating cavity; The differential lock subassembly is arranged in the first accommodating cavity; The differential lock switch includes the body and the contact part, the body is detachably connected on the side wall of recess close to the speed reducer shell, one end of contact part is connected with the body, the other end of contact part passes through the side wall of recess close to the speed reducer shell and is located in the first accommodating cavity. The drive axle assembly is convenient for assembling, can avoid the interference problem of differential lock switch and brake, and the problem of differential lock switch knock damage.

Description

Technical Field

[0001] This utility model relates to the field of vehicle drive axle technology, and in particular to a drive axle assembly and a vehicle. Background Technology

[0002] The differential lock device in the drive axle assembly typically locks the differential by introducing gas or liquid into the differential lock cylinder, which in turn moves the differential lock's shift fork. The differential lock switch is usually connected to the outside of the drive axle housing and works in conjunction with the differential lock assembly.

[0003] Most existing commercial vehicles adopt a short wheelbase structure, which results in limited space between the brakes located on both sides of the drive axle assembly and the reducer housing located in the middle of the drive axle assembly. Consequently, the differential lock switch protruding from the axle housing will interfere with the brakes, which is not conducive to the assembly of the differential lock switch and also poses a risk of damage to the differential lock switch due to impact. Utility Model Content

[0004] The purpose of this utility model is to provide a drive axle assembly and vehicle that is easy to assemble and can avoid interference between the differential lock switch and the brake, as well as damage to the differential lock switch due to impact.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On one hand, a drive axle assembly is provided, including: a reducer housing, an axle housing, a differential housing, a differential lock assembly, and a differential switch. The reducer housing is provided with a first receiving cavity. The axle housing and the reducer housing are detachably connected. A groove is provided at one end of the axle housing near the reducer housing. The differential housing is disposed in the first receiving cavity. The differential lock assembly is disposed in the first receiving cavity. The differential lock switch includes a body and a contact portion. The body is detachably connected to the side wall of the groove near the reducer housing. One end of the contact portion is connected to the body. The other end of the contact portion passes through the groove near the side wall of the reducer housing and is located in the first receiving cavity.

[0007] Preferably, a first connecting flange is provided on the axle housing, and a second connecting flange is provided on the reducer housing. Both the first and second connecting flanges are closed annular structures. The first connecting flange is provided with a plurality of first connecting holes spaced apart circumferentially, and the second connecting flange is provided with a plurality of second connecting holes spaced apart circumferentially. The plurality of first connecting holes and the plurality of second connecting holes are provided in a one-to-one correspondence.

[0008] Preferably, the multiple first connecting holes are blind holes, the multiple second connecting holes are through holes, and the drive axle assembly also includes multiple fastening bolts, which are sequentially screwed into the second connecting holes and the first connecting holes to lock or unlock the relative positions of the axle housing and the reducer housing.

[0009] Preferably, the second connecting flange has a boss circumferentially provided on the side near the first connecting flange. The boss has a contact surface that fits against the inner wall of the first connecting flange, and the contact surface is an annular closed curved surface.

[0010] Preferably, the differential lock assembly includes a sliding toothed sleeve, a shift fork, a drive shaft, an elastic element, and a piston. The end face of the sliding toothed sleeve can contact or separate from the differential housing. The drive shaft is slidably disposed in the receiving cavity. One end of the shift fork is connected to the drive shaft, and the other end of the shift fork is connected to the sliding toothed sleeve. The elastic element is sleeved on the drive shaft, and both ends of the elastic element are respectively connected to the shift fork and the reducer housing. The piston is connected to the drive shaft and can slide along the axial direction of the drive shaft to drive the drive shaft to slide. The side of the shift fork near the differential lock switch has a protrusion that can contact or separate from the contact part.

[0011] Preferably, the differential housing has a journal protruding along the extension direction of the half shaft, the end face of the journal has a first end face tooth, and the sliding sleeve has a second end face tooth at one end near the differential housing, the second end face tooth being able to mesh with the first end face tooth.

[0012] Preferably, the reducer housing has a piston mounting hole, and the drive axle assembly also includes a piston cover, which is screwed into the piston mounting hole and has a connector for communicating with the power source.

[0013] Preferably, the piston cover has a receiving groove for accommodating the piston, and a plurality of gaskets are selectively provided between one end of the piston and the bottom wall of the receiving groove so that the other end of the piston abuts against the end of the shift fork connected to the drive shaft.

[0014] Preferably, a first annular sealing groove is provided on the contact surface, and the drive axle assembly further includes a first sealing element disposed in the first annular sealing groove;

[0015] And / or, the sidewall of the receiving groove is provided with a second annular sealing groove in the circumferential direction, and the drive axle assembly also includes a second seal, which is disposed in the second annular sealing groove.

[0016] On the other hand, a vehicle is provided, the vehicle including a frame and a drive axle assembly of any of the above-mentioned technical solutions, the drive axle assembly being mounted on the frame.

[0017] The beneficial effects of this utility model are as follows: It provides a drive axle assembly and a vehicle, wherein the drive axle assembly has a groove provided at one end of the axle housing near the reducer housing; the differential housing is disposed in the first receiving cavity of the reducer housing; the differential lock assembly is disposed in the first receiving cavity; the differential lock switch includes a body and a contact part, the body is detachably connected to the side wall of the groove near the reducer housing, one end of the contact part is connected to the body, and the other end of the contact part passes through the groove near the side wall of the reducer housing and is located in the first receiving cavity, so that the groove serves as the arrangement space for the differential lock switch, the assembly structure is more compact, it is easy to assemble, and it avoids the problem of interference between the differential lock switch and the brake, while also avoiding the problem of damage to the differential lock switch due to impact. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the drive axle assembly provided by this utility model;

[0019] Figure 2 This is a partial cross-sectional view of the drive axle assembly provided by this utility model;

[0020] Figure 3 This is a schematic diagram of the bridge housing provided by this utility model;

[0021] Figure 4 This is a cross-sectional view of the bridge housing provided by this utility model;

[0022] Figure 5 This is a cross-sectional view of the reducer housing provided by this utility model;

[0023] Figure 6 yes Figure 5 A magnified view of part A in the middle;

[0024] Figure 7 This is a schematic diagram of the structure of the shift fork provided by this utility model.

[0025] In the figure: 1. Reducer housing; 11. First receiving cavity; 12. Second connecting flange; 121. Second connecting hole; 122. Boss; 123. First annular sealing groove; 13. Piston mounting hole;

[0026] 2. Bridge housing; 21. Groove; 22. First connecting flange; 221. First connecting hole;

[0027] 3. Differential housing;

[0028] 4. Differential lock assembly; 41. Sliding toothed sleeve; 42. Shift fork; 421. Protrusion; 43. Drive shaft; 44. Elastic element; 45. Piston;

[0029] 5. Differential lock switch; 51. Body; 52. Contact part;

[0030] 6. Piston cap; 61. Connector;

[0031] 7. First seal; 8. Second seal. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Most existing commercial vehicles use a short wheelbase structure, resulting in limited space between the brakes located on both sides of the drive axle assembly and the reducer housing 1 located in the middle of the drive axle assembly. Consequently, the differential lock switch 5, which protrudes from the axle housing 2, may interfere with the brakes, hindering the assembly of the differential lock switch 5 and posing a risk of damage from impacts. On the other hand, in order to allow the driven bevel gear and differential lock in the reducer assembly to fit into the cavity of the axle housing 2, the flange of the axle housing 2 often adopts a notch structure to prevent interference between the reducer assembly and the cavity of the axle housing 2. However, this notch structure frequently suffers from oil leakage and failure.

[0037] This embodiment provides a drive axle assembly and a vehicle to solve the above-mentioned problems.

[0038] On the one hand, please refer to Figures 1 to 7 This embodiment provides a drive axle assembly, including: a reducer housing 1, an axle housing 2, a differential housing 3, a differential lock assembly 4, and a differential switch. The reducer housing 1 is provided with a first receiving cavity 11. The axle housing 2 and the reducer housing 1 are detachably connected. The axle housing 2 is provided with a groove 21 at one end near the reducer housing 1. The differential housing 3 is disposed in the first receiving cavity 11. The differential lock assembly 4 is disposed in the first receiving cavity 11. The differential lock switch 5 includes a body 51 and a contact portion 52. The body 51 is detachably connected to the side wall of the groove 21 near the reducer housing 1. One end of the contact portion 52 is connected to the body 51, and the other end of the contact portion 52 passes through the groove 21 near the side wall of the reducer housing 1 and is located in the first receiving cavity 11. With this configuration, a groove 21 is provided at one end of the axle housing 2 near the reducer housing 1; the differential housing 3 is located in the first receiving cavity 11 of the reducer housing 1; the differential lock assembly 4 is located in the first receiving cavity 11; the differential lock switch 5 includes a body 51 and a contact part 52. The body 51 is detachably connected to the side wall of the groove 21 near the reducer housing 1, one end of the contact part 52 is connected to the body 51, and the other end of the contact part 52 passes through the groove 21 near the side wall of the reducer housing 1 and is located in the first receiving cavity 11. This makes the groove 21 serve as the arrangement space for the differential lock switch 5, resulting in a more compact assembly structure, facilitating assembly, and avoiding interference between the differential lock switch 5 and the brake. At the same time, the groove wall of the groove 21 provides protection for the differential lock switch 5, preventing damage from impacts.

[0039] Alternatively, please refer to Figure 1 , Figure 3 and Figure 5The axle housing 2 is provided with a first connecting flange 22, and the reducer housing 1 is provided with a second connecting flange 12. Both the first connecting flange 22 and the second connecting flange 12 are closed annular structures. The first connecting flange 22 has multiple first connecting holes 221 spaced apart circumferentially, and the second connecting flange 12 has multiple second connecting holes 121 spaced apart circumferentially. The multiple first connecting holes 221 and multiple second connecting holes 121 are arranged in a one-to-one correspondence. Specifically, in order to avoid interference between the first connecting flange 22 and the driven bevel gear and the differential lock, the diameters of the first connecting flange 22 and the second connecting flange 12 need to be adaptively adjusted according to the actual dimensions of the driven bevel gear and the differential lock to ensure that both the first connecting flange 22 and the second connecting flange 12 are closed annular structures. Compared with the scheme of setting a notch structure to arrange the driven bevel gear and the differential lock, the first connecting flange 22 and the second connecting flange 12 with closed annular structures have better sealing performance and avoid the risk of oil leakage at the connection between the first connecting flange 22 and the second connecting flange 12.

[0040] Preferably, the plurality of first connecting holes 221 are blind holes, and the plurality of second connecting holes 121 are through holes. The drive axle assembly also includes a plurality of fastening bolts, which are sequentially screwed into the second connecting holes 121 and the first connecting holes 221 in a one-to-one correspondence to lock or unlock the relative positions of the axle housing 2 and the reducer housing 1. This arrangement prevents oil leakage from the first connecting holes 221, further enhancing the sealing and reliability of the drive axle assembly.

[0041] Alternatively, please refer to Figure 5 and Figure 6 The second connecting flange 12 has a circumferentially oriented boss 122 on the side near the first connecting flange 22. The boss 122 has a contact surface that fits snugly against the inner wall of the first connecting flange 22, and this contact surface is an annular closed curved surface. This design effectively prevents oil leakage from the connection between the first and second connecting flanges 22 when the contact surface of the boss 122 of the second connecting flange 12 is tightly fitted against the inner wall of the first connecting flange 22. The annular closed curved contact surface forms a continuous sealing band, like a sealed "cap" at the connection, further enhancing the sealing performance and reliability of the drive axle assembly.

[0042] Furthermore, a first annular sealing groove 123 is provided on the contact surface, and the drive axle assembly also includes a first seal 7, which is disposed in the first annular sealing groove 123. This arrangement further enhances the sealing performance and reliability of the drive axle assembly, preventing oil leakage from the connection between the first connecting flange 22 and the second connecting flange 12.

[0043] Preferably, please refer to Figure 1 and Figure 2The differential lock assembly 4 includes a sliding sleeve 41, a shift fork 42, a drive shaft 43, an elastic element 44, and a piston 45. The end face of the sliding sleeve 41 can contact or separate from the differential housing 3. The drive shaft 43 is slidably disposed within the receiving cavity. One end of the shift fork 42 is connected to the drive shaft 43, and the other end of the shift fork 42 is connected to the sliding sleeve 41. The elastic element 44 is sleeved on the drive shaft 43, and both ends of the elastic element 44 are respectively connected to the shift fork 42 and the reducer housing 1. The piston 45 is connected to the drive shaft 43 and can slide along the axial direction of the drive shaft 43 to drive the drive shaft 43 to slide. The shift fork 42 has a protrusion 421 on the side near the differential lock switch 5, and the protrusion 421 can contact or separate from the contact part 52. Specifically, the elastic element 44 is a return spring, and the central axis of the elastic element 44 coincides with the central axis of the drive shaft 43. With this configuration, when the power source drives the piston 45 to move in the direction of compression of the elastic element 44, the piston 45 pushes the drive shaft 43, which in turn drives the shift fork 42 to move. The protrusion 421 of the shift fork 42 separates from the contact part 52 of the differential lock switch 5, and at the same time, the shift fork 42 drives the sliding tooth sleeve 41 to contact the differential housing 3. When the power source is unloaded, under the action of the return spring, the piston 45 drives the drive shaft 43 to move in the direction of stretching of the elastic element 44, and the protrusion 421 of the shift fork 42 contacts the contact part 52 of the differential lock switch 5. At the same time, the shift fork 42 drives the sliding tooth sleeve 41 to separate from the differential housing 3.

[0044] Preferably, please refer to Figure 2 The reducer housing 1 has a piston mounting hole 13. The drive axle assembly also includes a piston cover 6, which is screwed to the piston mounting hole 13. The piston cover 6 has a connector 61 for connecting to a power source, facilitating the connection of the differential lock assembly 4 to an external power source. Preferably, the power source is a pneumatic system, i.e., the connector 61 is connected to a pneumatic pipe, and high-pressure gas drives the piston 45 to move. In other embodiments, the power source can also be a hydraulic system.

[0045] Furthermore, the differential housing 3 has a journal protruding along the extension direction of the half-shaft. The end face of the journal has a first end face tooth, and the sliding toothed sleeve 41 has a second end face tooth near the end of the differential housing 3. The second end face tooth can mesh with the first end face tooth. Specifically, the outer circumferential surface of the sliding toothed sleeve 41 has an annular groove, the fork-shaped end of the shift fork 42 is inserted into the annular groove, and the connecting end of the shift fork 42 has a hole. The drive shaft 43 is connected to the shift fork 42 through the hole at the connecting end.

[0046] Preferably, a bearing is also fitted on the journal to radially limit the sliding tooth sleeve 41 and the first end face tooth of the journal.

[0047] Preferably, the piston cover 6 has a receiving groove for accommodating the piston 45. Multiple gaskets are selectively provided between one end of the piston 45 and the bottom wall of the receiving groove, so that the other end of the piston 45 abuts against the end of the shift fork 42 connected to the drive shaft 43. This arrangement facilitates adjustment of the position of the piston 45 along the axis of the drive shaft 43, ensuring that the end face of the piston 45 abuts against the shift fork 42, and guaranteeing that the piston 45 can drive the shift fork 42 to move synchronously when it moves.

[0048] Furthermore, a second annular sealing groove is circumferentially provided on the side wall of the receiving groove, and the drive axle assembly also includes a second seal 8, which is disposed in the second annular sealing groove. This arrangement further enhances the sealing performance and reliability of the drive axle assembly, preventing oil leakage between the piston 45 and the reducer housing 1.

[0049] On the other hand, a vehicle is provided, comprising a frame and the aforementioned drive axle assembly, the drive axle assembly being mounted on the frame. Preferably, the vehicle is a commercial vehicle. In other embodiments, the vehicle may also be an engineering vehicle, a special-purpose vehicle, etc.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A drive axle assembly, characterized in that, include: The reducer housing (1) is provided with a first receiving cavity (11). A bridge housing (2) is detachably connected to the reducer housing (1), and a groove (21) is provided at one end of the bridge housing (2) near the reducer housing (1). Differential housing (3), the differential housing (3) is disposed in the first receiving cavity (11); Differential lock assembly (4), the differential lock assembly (4) is disposed in the first receiving cavity (11); The differential lock switch (5) includes a body (51) and a contact part (52). The body (51) is detachably connected to the side wall of the groove (21) near the reducer housing (1). One end of the contact part (52) is connected to the body (51), and the other end of the contact part (52) passes through the groove (21) near the side wall of the reducer housing (1) and is located in the first receiving cavity (11).

2. The drive axle assembly according to claim 1, characterized in that, The bridge housing (2) is provided with a first connecting flange (22), and the reducer housing (1) is provided with a second connecting flange (12). Both the first connecting flange (22) and the second connecting flange (12) are closed annular structures. The first connecting flange (22) is provided with a plurality of first connecting holes (221) spaced apart circumferentially, and the second connecting flange (12) is provided with a plurality of second connecting holes (121) spaced apart circumferentially. The plurality of first connecting holes (221) and the plurality of second connecting holes (121) are provided in a one-to-one correspondence.

3. The drive axle assembly according to claim 2, characterized in that, The first connecting holes (221) are blind holes, and the second connecting holes (121) are through holes. The drive axle assembly also includes a plurality of fastening bolts, which are sequentially screwed into the second connecting holes (121) and the first connecting holes (221) to lock or unlock the relative positions of the axle housing (2) and the reducer housing (1).

4. The drive axle assembly according to claim 2, characterized in that, The second connecting flange (12) has a boss (122) circumferentially provided on the side near the first connecting flange (22). The boss (122) has a contact surface that fits against the inner wall of the first connecting flange (22). The contact surface is an annular closed curved surface.

5. The drive axle assembly according to claim 4, characterized in that, The differential lock assembly (4) includes a sliding sleeve (41), a shift fork (42), a drive shaft (43), an elastic element (44), and a piston (45). The end face of the sliding sleeve (41) can contact or separate from the differential housing (3). The drive shaft (43) is slidably disposed in the receiving cavity. One end of the shift fork (42) is connected to the drive shaft (43), and the other end of the shift fork (42) is connected to the sliding sleeve (41). The elastic element (44) is sleeved on the drive shaft. The shaft (43) and the two ends of the elastic element (44) are respectively connected to the shift fork (42) and the reducer housing (1). The piston (45) is connected to the drive shaft (43). The piston (45) can slide along the axial direction of the drive shaft (43) to drive the drive shaft (43) to slide. The shift fork (42) has a protrusion (421) on the side near the differential lock switch (5). The protrusion (421) can contact or separate from the contact part (52).

6. The drive axle assembly according to claim 5, characterized in that, The differential housing (3) has a journal protruding along the extension direction of the half shaft. The end face of the journal has a first end face tooth. The sliding tooth sleeve (41) has a second end face tooth at one end near the differential housing (3). The second end face tooth can mesh with the first end face tooth.

7. The drive axle assembly according to claim 5, characterized in that, The reducer housing (1) has a piston mounting hole (13), and the drive axle assembly also includes a piston cover (6), which is screwed into the piston mounting hole (13). The piston cover (6) is provided with a connector (61) for communicating with a power source.

8. The drive axle assembly according to claim 7, characterized in that, The piston cover (6) has a receiving groove for accommodating the piston (45), and a plurality of gaskets are selectively provided between one end of the piston (45) and the bottom wall of the receiving groove so that the other end of the piston (45) abuts against the end of the fork (42) connected to the drive shaft (43).

9. The drive axle assembly according to claim 8, characterized in that, The contact surface is provided with a first annular sealing groove (123), and the drive axle assembly further includes a first sealing element (7), which is disposed in the first annular sealing groove (123); And / or, the sidewall of the receiving groove is provided with a second annular sealing groove, and the drive axle assembly further includes a second seal (8), which is disposed in the second annular sealing groove.

10. A vehicle, characterized in that, The vehicle includes a frame and a drive axle assembly as described in any one of claims 1-9, the drive axle assembly being mounted on the frame.

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