Drive axle hub reduction gear

Abstract

The utility model provides a drive axle hub reduction gear, and relates to the field of axles. The drive axle hub reduction gear comprises a hub reduction shell, a hub, a gear ring, a gear ring support, a half shaft, a sun gear, a planet gear and a spacer bush. The wheel edge reduction shell is connected with the hub, the gear ring is rotatably installed in the wheel edge reduction shell, and the gear ring support is fixedly connected with the gear ring. The half shaft penetrates through the gear ring support and is rotatably matched with the gear ring support, and the sun gear is sleeved outside the half shaft; the planet gear is rotatably connected with the wheel edge reduction shell, and the planet gear is meshed with the sun gear and the gear ring at the same time; the half shaft is sleeved with the spacer bush, and the two ends of the spacer bush abut against the sun gear and the gear ring support respectively. The spacer bush is arranged between the sun gear and the gear ring support, the position firmness of the sun gear in the axial direction of the half shaft can be improved, and therefore the contact probability of the sun gear and the gear ring support is reduced, and stability and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle axles, and in particular to a drive axle wheel reducer. Background Art

[0002] The 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. The drive axle is generally composed of a main reducer, a differential, a wheel transmission device and a drive axle housing, and the steering drive axle also includes a constant velocity joint. In addition, the drive axle must also withstand the vertical force, longitudinal force and lateral force acting between the road surface and the frame or body, as well as the braking torque and reaction force.

[0003] The inventor has found that the existing drive axle wheel reducer has at least the following disadvantages:

[0004] The sun gear is positioned outside the half-shaft. During the movement of the half-shaft, the sun gear has poor axial position stability on the half-shaft and is prone to collision with the ring gear bracket, affecting safety. Utility Model Content

[0005] The utility model aims to provide a drive axle wheel reducer, which can improve the stability of the position of the sun gear in the axial direction of the half shaft.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides a drive axle wheel reducer, comprising:

[0008] A wheel-side reduction housing, a wheel hub, a ring gear, a ring gear bracket, a half-axle, a sun gear, a planetary gear and a spacer; the wheel-side reduction housing is connected to the wheel hub, the ring gear is rotatably installed in the wheel-side reduction housing, and the ring gear bracket is fixedly connected to the ring gear; the half-axle passes through the ring gear bracket and the two are rotatably matched, and the sun gear is sleeved on the outside of the half-axle; the planetary gear is rotatably connected to the wheel-side reduction housing, and the planetary gear is meshed with the sun gear and the ring gear at the same time; the spacer is sleeved on the outside of the half-axle, and the two ends of the spacer are respectively abutted against the sun gear and the ring gear bracket.

[0009] In an optional embodiment, the spacer has a gradient portion, the cross-sectional area of ​​the gradient portion gradually decreases in a direction from the ring gear support toward the sun gear, and the cross-sectional area is arranged as a plane perpendicular to the axis of the spacer.

[0010] Based on the above scheme, the structural design of the gradient part enables the half-axle to avoid the internal structure of the wheel side reduction shell when it moves with the spacer close to the wheel side reduction shell, thereby avoiding interference with the inside of the wheel side reduction shell; at the same time, compared with the cylindrical spacer, the spacer with the gradient part is small in size, occupies less space, saves materials, and has low manufacturing cost.

[0011] In an optional embodiment, the cross-sectional profile of the gradient portion is circular.

[0012] Based on the above solution, the structure of the gradient part is regular, which is convenient for processing, and the surface is a conical surface, which is balanced in force and not easy to crack.

[0013] In an optional embodiment, the spacer sleeve has a first end face and a second end face arranged at intervals in its axial direction, the first end face abuts the end face corresponding to the sun gear, and the second end face abuts the side face corresponding to the ring gear bracket; an oil groove is provided on one of the first end face and the second end face.

[0014] Based on the above scheme, by setting an oil groove on at least one of the first end face and the second end face, the amount of oil flow can be increased, so that each component can be better lubricated, the wear of the components can be reduced, the temperature during operation can be lowered, and the reliability of operation can be improved.

[0015] In an optional embodiment, there are multiple oil passage grooves located on the first end surface or the second end surface, and the multiple oil passage grooves are arranged at intervals in the circumferential direction of the spacer.

[0016] Based on the above solution, by providing a plurality of oil passage grooves, the oil passage area can be increased, thereby further improving the lubrication effect of the parts.

[0017] In an optional embodiment, the first end surface or the second end surface is configured as a wave surface, and the oil passage groove is formed at the location of the trough of the wave surface.

[0018] Based on the above solution, the spacer is easy to process and has high molding quality. The first end face or the second end face is a wave surface, which reduces stress concentration, makes the first end face and the second end face less likely to crack, and prolongs the service life of the spacer.

[0019] In an optional embodiment, a wear-resistant layer is provided on at least one of the first end surface and the second end surface.

[0020] Based on the above scheme, during the operation of the reducer, the first end face of the spacer sleeve abuts against the end face corresponding to the sun gear, and the second end face of the spacer sleeve abuts against the side face corresponding to the ring gear bracket. When the spacer sleeve, the sun gear and the ring gear bracket rotate relative to each other, the wear-resistant layer has good wear resistance and small wear, which can reduce grease impurities caused by wear.

[0021] In an optional embodiment, the drive axle wheel reducer further includes a wear-resistant gasket, which is fixedly installed in the wheel reducer housing and is used to contact the end surface of the half shaft.

[0022] Based on the above scheme, during the operation of the reducer, under some special working conditions, the half-shaft will move with the sun gear close to the wheel-side reduction shell, so that the end face of the half-shaft contacts the wheel-side reduction shell. Due to the design of the wear-resistant gasket, the end face of the half-shaft contacts the wear-resistant gasket but not the wheel-side reduction shell, and the wheel-side reduction shell is not easily worn; and the wear-resistant gasket has high wear resistance and is more wear-resistant than the wheel-side reduction shell, which can reduce wear during movement and reduce grease impurities caused by wear.

[0023] In an optional embodiment, an anti-rotation groove is provided on the inner wall of the wheel side reduction shell, and the wear-resistant gasket is clamped in the anti-rotation groove so that the wear-resistant gasket and the anti-rotation groove are relatively fixed in the circumferential direction of the anti-rotation groove.

[0024] Based on the above scheme, the wear-resistant gasket is clamped with the anti-rotation groove, the assembly structure of the wear-resistant gasket and the wheel side reduction shell is firm, and the wear-resistant gasket is not easy to rotate relative to the wheel side reduction shell, thereby avoiding the wear-resistant gasket rotating relative to the wheel side reduction shell and causing wear to the wheel side reduction shell.

[0025] In an optional embodiment, the drive axle wheel reducer further includes a pin and a needle bearing, the pin is installed in the wheel reducer housing, and the planetary gear is rotatably connected to the pin via the needle bearing.

[0026] Based on the above solution, the internal space of the wheel-side reduction housing is limited, and the space between the sun gear and the ring gear is small. The planetary gear can be better installed between the sun gear and the ring gear through the needle bearing, and the design of the needle bearing makes the planetary gear rotate more flexibly, reducing the wear of the planetary gear and the pin shaft.

[0027] The beneficial effects of the embodiments of the utility model are:

[0028] To summarize, the drive axle wheel-side reducer provided in the present embodiment has a spacer sleeve arranged between the sun gear and the ring gear bracket, one end face of the spacer sleeve can abut against the end face of the sun gear, and the other end face of the spacer sleeve can abut against the side face of the ring gear bracket. The spacer sleeve can limit the movement of the sun gear close to the ring gear bracket, thereby improving the axial position stability of the sun gear on the half-shaft, effectively avoiding contact and wear between the sun gear and the ring gear bracket, and improving the stability and reliability of the reducer operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the structure of the drive axle wheel reducer of an embodiment of the utility model;

[0031] Figure 2 This is a structural schematic diagram of the wheel side shell reduction of an embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the structure of the wear-resistant gasket of an embodiment of the utility model;

[0033] Figure 4 It is a schematic diagram of the assembly of the drive axle wheel reducer of the embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the fixing bolt of an embodiment of the utility model;

[0035] Figure 6 It is a schematic diagram of the structure of the spacer in an embodiment of the utility model;

[0036] Figure 7 It is a cross-sectional schematic diagram of a spacer sleeve according to an embodiment of the utility model.

[0037] icon:

[0038] 001-fixing bolt; 011-end cap; 002-screw plug; 100-wheel side shell reduction; 110-folded edge; 120-outer cylinder; 121-anti-rotation groove; 122-stop; 130-inner stop; 200-wheel hub; 300-gear ring; 400-gear ring bracket; 500-semi-axle; 510-retaining ring; 600-sun gear; 700-planetary gear; 800-spacer; 810-gradient part; 820-oil groove; 900-pin shaft; 910-needle bearing; 920-wear-resistant gasket; 921-disc body; 922-convex part. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the prior art, the sun gear 600 is sleeved on the outside of the half shaft 500, and no blocking structure is provided between the sun gear 600 and the ring gear bracket 400. When the half shaft 500 moves closer to the ring gear bracket 400, the sun gear 600 is easily in contact with the ring gear bracket 400, which affects reliability.

[0046] In view of this, the designer provides a drive axle wheel-side reducer, which can improve the axial position firmness of the sun gear 600 on the half shaft 500 by providing a spacer sleeve 800 between the sun gear 600 and the ring gear bracket 400, thereby reducing the probability of contact between the sun gear 600 and the ring gear bracket 400 and improving stability and reliability.

[0047] Please combine Figure 1-Figure 3 In this embodiment, the drive axle wheel reducer includes a wheel reducer housing 100, a wheel hub 200, a ring gear 300, a ring gear bracket 400, a half shaft 500, a sun gear 600, a planetary gear 700 and a spacer sleeve 800; the wheel reducer housing 100 is connected to the wheel hub 200, the ring gear 300 is rotatably installed in the wheel reducer housing 100, and the ring gear bracket 400 is fixedly connected to the ring gear 300; the half shaft 500 passes through the ring gear bracket 400 and the two are rotatably matched, and the sun gear 600 is sleeved on the outside of the half shaft 500; the planetary gear 700 is rotatably connected to the wheel reducer housing 100, and the planetary gear 700 is meshed with the sun gear 600 and the ring gear 300 at the same time; the spacer sleeve 800 is sleeved on the outside of the half shaft 500, and the two ends of the spacer sleeve 800 are respectively abutted against the sun gear 600 and the ring gear bracket 400.

[0048] Based on the above, the working principle of the drive axle wheel reducer provided in this embodiment is as follows:

[0049] The power is input to the half shaft 500, and the half shaft 500 drives the sun gear 600 to rotate. The torque is transmitted to the planetary gear 700 through the sun gear 600, and then transmitted to the ring gear 300 through the planetary gear 700. Since the ring gear 300 is fixed to the ring gear bracket 400, and the ring gear bracket 400 is fixed to the bridge housing, the ring gear 300, as a fixed structure, will not rotate. The planetary gear 700 is rotatably mounted on the wheel side reduction housing 100, and the planetary gear 700 is meshed with the sun gear 600 and the ring gear 300 at the same time. The planetary gear 700 will revolve around the axis of the sun gear 600 while rotating, and the planetary gear 700 will drive the wheel side reduction housing 100 to rotate while revolving, so as to achieve the output of torque through the wheel side reduction housing 100. Since a spacer sleeve 800 is arranged between the sun gear 600 and the ring gear bracket 400, one end face of the spacer sleeve 800 can abut against the end face of the sun gear 600, and the other end face of the spacer sleeve 800 can abut against the side face of the ring gear bracket 400. The spacer sleeve 800 can limit the movement of the sun gear 600 close to the ring gear bracket 400, improve the axial position stability of the sun gear 600 on the half shaft 500, effectively avoid contact wear between the sun gear 600 and the ring gear bracket 400, and improve the stability and reliability of the reducer operation.

[0050] The following embodiments illustrate the details of the drive axle wheel reducer provided in the present application by way of examples.

[0051] In this embodiment, optionally, the drive axle wheel reducer includes a wheel reducer housing 100, a wheel hub 200, a ring gear 300, a ring gear bracket 400, a half shaft 500, a sun gear 600, a planetary gear 700, a spacer sleeve 800, a pin shaft 900, a needle bearing 910 and a wear-resistant gasket 920.

[0052] The wheel side reduction housing 100 is docked with the wheel hub 200, and the docking positions of the two can be connected by fasteners such as bolts. In addition, multiple bolts can be arranged in the circumferential direction of the two to improve the stability of the connection. The ring gear 300 is rotatably installed in the wheel side reduction housing 100, and the outer peripheral surface of the ring gear 300 is clearance-matched with the inner peripheral wall of the wheel side reduction housing 100 to avoid contact and wear between the two. The ring gear bracket 400 is fixedly connected with the ring gear 300, and the ring gear bracket 400 is used to be fixedly connected with the bridge housing by fasteners such as bolts. A through hole is provided in the middle of the ring gear bracket 400, and the half shaft 500 is rotatably matched with the ring gear bracket 400 after passing through the through hole, and the half shaft 500 and the through hole can be clearance-matched to reduce wear. The sun gear 600 is sleeved on the outside of the half shaft 500, and the sun gear 600 can be matched with the half shaft 500 through a spline structure, so that the sun gear 600 can rotate with the half shaft 500. At the same time, a retaining ring 510 is provided at the end of the half shaft 500 close to the wheel side reduction housing 100, and the left end face of the sun gear 600 abuts against the retaining ring 510. The pin shaft 900 is fixed inside the wheel side reduction housing 100, and the pin shaft 900 is arranged parallel to the half shaft 500. The needle bearing 910 is sleeved on the outside of the pin shaft 900, and the planetary gear 700 is sleeved on the outside of the needle bearing 910. The planetary gear 700 is rotatably matched with the pin shaft 900 through the needle bearing 910. The planetary gear 700 is meshed with the sun gear 600 and the ring gear 300 at the same time. The spacer 800 is sleeved on the outside of the half shaft 500, and the two ends of the spacer 800 abut against the right end face of the sun gear 600 and the left side face of the ring gear bracket 400 respectively. Through the cooperation of the retaining ring 510 and the spacer 800, the freedom of the sun gear 600 in the axial direction of the half shaft 500 is limited. The wear-resistant gasket 920 is installed inside the wheel side reduction shell 100 , and the wear-resistant gasket 920 is used to contact the end surface of the half shaft 500 close to the wheel side reduction shell 100 .

[0053] Optionally, the wheel edge reduction shell 100 includes an integrated folding edge 110, an outer cylinder 120 and an inner stopper 130. One end of the outer cylinder 120 is open and the other end is closed. The folding edge 110 is an annular plate. The folding edge 110 is formed at the open end of the outer cylinder 120 and folded outward. The axis of the folding edge 110 is colinear with the axis of the outer cylinder 120. The inner stopper 130 is located in the outer cylinder 120 and one end of the inner stopper 130 is fixed to the closed end of the outer cylinder 120. The inner stopper 130 is coaxially arranged with the outer cylinder 120. An anti-rotation groove 121 and a mounting hole are arranged on the inner wall surface of the closed end of the outer cylinder 120. The anti-rotation groove 121 is located in the area surrounded by the inner stopper 130, and the mounting hole is located between the inner stopper 130 and the outer cylinder 120. The anti-rotation groove 121 is a non-circular groove. For example, the anti-rotation groove 121 includes a circular groove and a concave portion convex relative to the circular groove and arranged on the groove wall of the circular groove. The mounting holes may be round blind holes.

[0054] During assembly, the gear ring 300 is located between the inner block 130 and the outer cylinder 120 , and the gear ring 300 is arranged at intervals with the cylinder walls of the outer cylinder 120 and the inner block 130 . The sun gear 600 is located in the cylinder cavity surrounded by the inner block 130 .

[0055] Please combine Figure 2 Optionally, the outer peripheral surface of the folded edge 110 is provided with a plurality of arcuate grooves, and the plurality of arcuate grooves are evenly spaced in the circumferential direction of the folded edge 110, so that the shape of the folded edge 110 is roughly petal-shaped, which can reduce the weight of the wheel side bridge housing 100, reduce consumables, and reduce manufacturing costs.

[0056] In addition, a stop 122 is provided on the outer peripheral surface of one end of the outer cylinder 120 close to the folded edge 110. When the outer cylinder 120 and the rim are assembled, the two can be better positioned and matched, thereby improving the assembly quality.

[0057] Please combine Figure 5 In this embodiment, optionally, a fixing hole is provided on the side of the wheel hub 200 that is away from the wheel side reduction shell 100, and a part of the hole section of the fixing hole is non-circular. A fixing bolt 001 that fixes the wheel hub 200 and the wheel side reduction shell 100 is passed through the fixing hole, and the fixing bolt 001 has a non-circular end cap 011, and the end cap 011 is clamped in the non-circular hole section of the fixing hole. The fixing bolt 001 is not easy to rotate relative to the wheel hub 200, and the fastening effect is good. For example, the shape of the end cap 011 can be a horseshoe shape, and correspondingly, the shape of the non-circular hole section of the fixing hole is a horseshoe shape.

[0058] Optionally, the spacer 800 has a first end face and a second end face arranged at intervals in the axial direction thereof, the first end face abuts against the end face corresponding to the sun gear 600, and the second end face abuts against the side face corresponding to the ring gear bracket 400; one of the first end face and the second end face is provided with an oil passing groove 820. In this embodiment, the first end face and the second end face are both provided with an oil passing groove 820, and the number of the oil passing grooves 820 on the first end face and the second end face can be multiple. By providing the oil passing grooves 820, the amount of oil passing can be increased, thereby improving the lubrication effect.

[0059] Optionally, both the first end face and the second end face are configured as wave faces, and the trough of the wave face forms an oil groove 820. The spacer 800 is easy to process and has high molding quality. At the same time, the first end face or the second end face is a wave face, which reduces stress concentration, makes the first end face and the second end face less likely to crack, and prolongs the service life of the spacer 800.

[0060] It should be understood that in other embodiments, only the first end surface or the second end surface may be configured as a wavy surface.

[0061] Furthermore, a wear-resistant layer is provided on both the first end surface and the second end surface. During the operation of the reducer, the first end surface of the spacer 800 abuts against the end surface corresponding to the sun gear 600, and the second end surface of the spacer 800 abuts against the side surface corresponding to the ring gear bracket 400. When the spacer 800 rotates relative to the sun gear 600 and the ring gear bracket 400, the wear-resistant layer has good wear resistance and small wear, which can reduce grease impurities caused by wear.

[0062] It should be understood that in other embodiments, the wear-resistant layer may be provided only on the first end surface or the second end surface.

[0063] Please combine Figure 6 and Figure 7 Optionally, the spacer 800 has a gradient portion 810, the cross-sectional profile of the gradient portion 810 is circular, the cross-sectional area of ​​the gradient portion 810 gradually decreases in the direction from the ring gear bracket 400 to the sun gear 600, and the cross-sectional area is set as a plane perpendicular to the axis of the spacer 800. With such a design, when the half shaft 500 moves close to the wheel side reduction shell 100 with the spacer 800, it can avoid the internal structure of the wheel side reduction shell 100 and avoid interference with the inside of the wheel side reduction shell 100; at the same time, compared with the cylindrical spacer 800, the spacer 800 with the gradient portion 810 has a small volume, occupies a small space, saves materials, and has a low manufacturing cost. In addition, the gradient portion 810 of the spacer 800 can correspond to the barrel mouth of the inner block 130. When the half shaft 500 moves close to the wheel side reduction shell 100 with the spacer 800, the spacer 800 is not easy to interfere with the barrel mouth of the inner block 130.

[0064] In the present embodiment, optionally, the shape of the wear-resistant gasket 920 is roughly consistent with the shape of the anti-rotation groove 121. After the wear-resistant gasket 920 is snapped into the anti-rotation groove 121, the wear-resistant gasket 920 is not easy to rotate relative to the anti-rotation groove 121, that is, the wear-resistant gasket 920 is not easy to rotate relative to the wheel side reduction shell 100. The wheel side reduction shell 100 is generally configured as a casting, and its hardness is not as good as the forged half shaft 500. Therefore, the wear-resistant gasket 920 and the anti-rotation groove 121 are snap-fitted to play an anti-rotation role, thereby avoiding friction between the wear-resistant gasket 920 and the wheel side reduction shell 100 and reducing grease impurities caused by wear.

[0065] For example, the wear-resistant gasket 920 includes a disc body 921 and a convex portion 922 convexly provided on the outer circumferential surface of the disc body 921. The disc body 921 and the convex portion 922 are clamped together in the anti-rotation groove 121, and the convex portion 922 is clamped and matched with the concave portion to play an anti-rotation role.

[0066] Furthermore, the wear-resistant gasket 920 can be configured as a hollow structure to reduce weight, reduce consumables, and save costs.

[0067] Please combine Figure 4 In other embodiments, optionally, a screw plug 002 is installed on the closed side of the outer cylinder 120 of the wheel-side bridge housing 100, and the part of the screw plug 002 located inside the wheel-side bridge housing 100 is set as a magnetic structure, or the part of the screw plug 002 located inside the wheel-side bridge housing 100 is installed with a permanent magnet. With such a design, when iron filings are mixed in the lubricating oil due to wear in the wheel-side reducer, the magnetic structure or permanent magnet possessed by the screw plug 002 can absorb the iron filings and impurities in the grease, and gather the iron impurities at the oil outlet, which is convenient for removal when draining the oil.

[0068] In this embodiment, the drive axle wheel-side reducer is provided with a spacer sleeve 800 on the half-shaft 500. The spacer sleeve 800 is located between the sun gear 600 and the ring gear bracket 400. The spacer sleeve 800 can limit the sun gear 600 from approaching the ring gear bracket 400, thereby improving the stability of the axial position of the sun gear 600, thereby improving the stability and reliability of the wheel-side reducer operation.

[0069] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A drive axle wheel reducer, characterized in that: include: A wheel-side reduction housing (100), a wheel hub (200), a gear ring (300), a gear ring bracket (400), a half shaft (500), a sun gear (600), a planetary gear (700) and a spacer (800); the wheel-side reduction housing (100) is connected to the wheel hub (200), the gear ring (300) is rotatably mounted in the wheel-side reduction housing (100), and the gear ring bracket (400) is fixedly connected to the gear ring (300); the half shaft (500) passes through the gear ring bracket (400) and the two are rotatably matched, the sun gear (600) is sleeved on the outside of the half shaft (500); the planetary gear (700) is rotatably connected to the wheel side reduction housing (100), and the planetary gear (700) is simultaneously engaged with the sun gear (600) and the ring gear (300); the spacer sleeve (800) is sleeved on the outside of the half shaft (500), and the two ends of the spacer sleeve (800) are respectively abutted against the sun gear (600) and the ring gear bracket (400).

2. The drive axle wheel reducer according to claim 1, characterized in that: The spacer (800) has a gradient portion (810), the cross-sectional area of ​​which gradually decreases in a direction from the ring gear support (400) toward the sun gear (600), and the cross-sectional area is arranged as a plane perpendicular to the axis of the spacer (800).

3. The drive axle wheel reducer according to claim 2, characterized in that: The cross-sectional profile of the gradient portion (810) is circular.

4. The drive axle wheel reducer according to claim 1, characterized in that: The spacer sleeve (800) has a first end face and a second end face spaced apart in its axial direction, the first end face abuts against the end face corresponding to the sun gear (600), and the second end face abuts against the side face corresponding to the ring gear bracket (400); an oil groove (820) is provided on one of the first end face and the second end face.

5. The drive axle wheel reducer according to claim 4, characterized in that: There are a plurality of oil passage grooves (820) located on the first end surface or the second end surface, and the plurality of oil passage grooves (820) are arranged at intervals in the circumferential direction of the spacer (800).

6. The drive axle wheel reducer according to claim 4, characterized in that: The first end surface or the second end surface is configured as a wave surface, and the oil passage groove (820) is formed at the position where the trough of the wave surface is located.

7. The drive axle wheel reducer according to claim 4, characterized in that: A wear-resistant layer is disposed on at least one of the first end surface and the second end surface.

8. The drive axle wheel reducer according to claim 1, characterized in that: The drive axle wheel reducer also includes a wear-resistant gasket (920), which is fixedly installed in the wheel reducer housing (100) and is used to contact the end surface of the half shaft (500).

9. The drive axle wheel reducer according to claim 8, characterized in that: An anti-rotation groove (121) is provided on the inner wall of the wheel side reduction shell (100), and the wear-resistant gasket (920) is clamped in the anti-rotation groove (121) so that the wear-resistant gasket (920) and the anti-rotation groove (121) are relatively fixed in the circumferential direction of the anti-rotation groove (121).

10. The drive axle wheel reducer according to claim 1, characterized in that: The drive axle wheel reducer also includes a pin shaft (900) and a needle bearing (910), wherein the pin shaft (900) is installed in the wheel reducer housing (100), and the planetary gear (700) is rotatably connected to the pin shaft (900) via the needle bearing (910).

Images