Hub reduction shell and hub reduction gear assembly

Abstract

The utility model provides a hub reduction shell and a hub reduction gear assembly, and relates to the field of reduction gears. The hub reduction shell comprises a main shell body and a gear ring body, the main shell body is provided with an assembly cavity, the gear ring body is fixed to the cavity wall of the assembly cavity, and the gear ring body and the main shell body are relatively fixed in the circumferential direction of the gear ring body. The hub speed reduction shell is simple in structure, low in machining difficulty and simple in stress during operation, and a speed reducer assembly operates stably and reliably.

Description

Technical Field

[0001] The utility model relates to the field of reducers, and in particular to a wheel-side reduction housing and a wheel-side reducer assembly. Background Art

[0002] The transmission method of the existing wet brake wheel-side reduction assembly of the drive axle of electric vehicles is generally that the half-axle inputs torque to the sun gear, the sun gear drives the planetary gear to rotate, and the ring gear is fixed on the support shaft. Under the restriction of the ring gear, the planetary gear rotates while revolving around the sun gear, thereby driving the planetary wheel carrier on which the planetary gear is installed to rotate. The planetary wheel carrier is connected to the wheel hub, thereby driving the wheel hub to rotate. At the same time, the braking method of the existing wheel-side reduction assembly is generally to allow hydraulic oil to enter the cavity between the ring gear and the piston, push the piston to press the dynamic friction plate and the static friction plate, and realize driving braking. In this way, the ring gear is simultaneously subjected to the axial force during braking and the radial force when the planetary gear transmits torque. The force is complex, and the requirements for the strength and processing accuracy of the components are high, and the processing and manufacturing costs are high. Utility Model Content

[0003] The purpose of the utility model is to provide a wheel-side reduction housing and a wheel-side reducer assembly, which can simplify the structure, reduce the difficulty of processing, reduce the complexity of the force, and improve the stability and reliability of the reducer operation.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In a first aspect, the utility model provides a wheel-side reduction housing, comprising:

[0006] A main housing and a gear ring body, wherein the main housing is provided with an assembly cavity, the gear ring body is fixed to the cavity wall of the assembly cavity, and the gear ring body and the main housing are relatively fixed in the circumferential direction of the gear ring body.

[0007] In an optional embodiment, the main housing and the gear ring body are configured as an integral structure.

[0008] Based on the above scheme, the main housing and the gear ring body have high structural strength, long service life and low operating cost. At the same time, the main housing and the gear ring body are made by an integrated processing technology, which can be mass-produced, with high processing and manufacturing efficiency and low processing and manufacturing cost.

[0009] In an optional embodiment, the main shell has a first port and a second port arranged relatively to each other in the axial direction of the ring gear body, the first port is provided with an outward-turned annular folded edge, and the annular folded edge is used for fixed connection with the hub body; the ring gear body is arranged close to the second port.

[0010] Based on the above scheme, the annular folding edge cooperates with the hub body, so the installation is convenient and quick, the main housing and the hub have a large contact area after installation, the combination is stable and reliable, and the use is safe and reliable. Due to the design of the second port, it is convenient to disassemble and assemble the planetary gear, planetary carrier and other structural parts from the second port, which reduces the difficulty of assembly, improves the disassembly efficiency, and reduces the processing and manufacturing cost.

[0011] In an optional embodiment, the wheel-side reduction housing further includes an end plate, the end plate is connected to the main housing, and the end plate is used to open or close the second port.

[0012] Based on the above solution, during normal use, the end plate can close the second port, improve the sealing of the main housing, and prevent oil leakage at the second port or impurities from entering the main housing from the second port, affecting the normal operation of the reducer. In addition, after opening the end plate, some parts are exposed from the second port, which is convenient for maintenance and replacement.

[0013] In an optional embodiment, a plurality of first assembly holes are provided on the end face of the main shell corresponding to the second port, and a plurality of second assembly holes are provided on the end plate. The plurality of first assembly holes are connected with the plurality of second assembly holes in a one-to-one correspondence, and locking members for fixing the main shell and the end plate are passed through the connected first assembly holes and the second assembly holes.

[0014] Based on the above solution, the end plate and the main housing are connected by a locking member, the fixing method is simple and reliable, and the assembly and disassembly are convenient and quick. Since there are multiple first assembly holes and second assembly holes, there are multiple corresponding fasteners, and multiple fasteners cooperate to fix the end plate and the main housing, thereby improving the fixing effect of the end plate and the main housing.

[0015] In an optional embodiment, the end plate includes an integrated cover body and a positioning protrusion ring, the positioning protrusion ring is protruding from the plate surface of the cover body, the positioning protrusion ring is inserted into the second port and contacts the cavity wall of the assembly cavity; the cover body contacts the end surface where the second port is located, and the cover body is connected to the main shell.

[0016] Based on the above scheme, when assembling the end plate and the main housing, the positioning convex ring is inserted into the second port, and the outer peripheral surface of the positioning convex ring contacts the inner wall surface of the second port, that is, the cavity wall of the assembly cavity. The radial freedom of the end plate and the main housing in the gear ring body is limited, and the end plate will not move radially relative to the main housing. The two are firmly and reliably matched and are not easy to loosen. In addition, after the positioning convex ring is inserted into the second port, it is only necessary to adjust the circumferential position of the end plate and the main housing in the gear ring body so that the first assembly hole and the second assembly hole are aligned. The positioning operation of the end plate and the main housing is convenient, the positioning time is short, and the assembly efficiency is improved.

[0017] In an optional embodiment, an annular positioning groove connected to the assembly cavity is provided on the end face where the second port is located, and the annular positioning groove extends around the axis of the gear ring body. An annular sealing body is provided in the annular positioning groove, and the annular sealing body is in contact with the cover body and the positioning convex ring at the same time.

[0018] Based on the above solution, the contact area between the annular sealing body and the end plate is large, which can increase the sealing area, thereby improving the sealing performance of the end plate and the main shell.

[0019] In an optional embodiment, an adjustment hole is provided on the end plate, and a distance adjusting member is assembled in the adjustment hole. The position of the distance adjusting member in the axial direction of the adjustment hole is adjustable, and the distance adjusting member can be locked relative to the end plate after being adjusted relative to the adjustment hole to limit the distance adjusting member from sliding relative to the end plate when subjected to axial force.

[0020] Based on the above scheme, during normal use, the end face of the distance adjusting member that extends into the assembly cavity can contact the end face of the half shaft, and the distance adjusting member limits the position of the half shaft, reduces the shaking of the half shaft in its own axial direction, and improves the stability of operation. Since the half shaft generates friction with the distance adjusting member during movement, the distance adjusting member is worn. When the distance adjusting member is worn, the depth of the distance adjusting member inserted into the adjustment hole is increased, that is, the distance adjusting member is moved closer to the half shaft, so that the distance adjusting member is abutted against the end face of the half shaft again, and the gap between the distance adjusting member and the end face of the half shaft after the wear is made up. In this way, the half shaft can always be guaranteed to rotate stably.

[0021] In an optional embodiment, the distance adjusting member is threadedly engaged with the adjusting hole.

[0022] Based on the above scheme, the position of the distance adjusting member relative to the half-shaft is adjusted by rotating the distance adjusting member, which is easy to operate. After the distance adjusting member is rotated, the threaded structure has a self-locking function. When the distance adjusting member is subjected to the axial force transmitted from the half-shaft, the distance adjusting member will not move relative to the adjusting hole, and the limiting effect is good.

[0023] In a second aspect, the utility model provides a wheel-side reducer assembly, the wheel-side reducer assembly comprising:

[0024] A wheel reduction housing according to any one of the aforementioned embodiments.

[0025] The beneficial effects of the embodiments of the utility model are:

[0026] In summary, the wheel-side reduction housing provided in this embodiment is separated from the planetary carrier by fixing the main housing and the ring gear body together. The main housing and the planetary carrier are independently arranged, which reduces the difficulty of processing and manufacturing, reduces the processing and manufacturing cost, and improves the convenience of assembly. Since the ring gear body is separated from the brake cylinder, during the operation of the wheel-side reducer assembly, the ring gear body is subjected to radial force, and the brake cylinder is subjected to axial force. The force on the ring gear body and the force on the brake cylinder do not interfere with each other, the force is simple, and the movement of the wheel-side reducer assembly is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 This is an exploded schematic diagram of a wheel-side reduction housing according to an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of an end plate of an embodiment of the utility model;

[0030] Figure 3 A schematic diagram of a wheel reducer assembly according to an embodiment of the utility model;

[0031] Figure 4 for Figure 3 A local enlarged schematic diagram of the .

[0032] icon:

[0033] 100-main housing; 101-assembly cavity; 102-first port; 103-second port; 104-annular positioning groove; 105-first assembly hole; 110-annular folded edge; 111-through hole; 200-gear ring body; 300-end plate; 310-cover body; 311-adjustment hole; 312-second assembly hole; 320-positioning convex ring; 400-locking piece; 500-adjustment piece; 600-annular sealing body; 001-wheel side reduction housing; 002-wheel hub body; 003-semi-axle; 004-support shaft; 005-center wheel; 006-planetary gear; 007-bracket; 008-brake device. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, 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.

[0038] 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.

[0039] 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.

[0040] In the prior art, the planetary gear support 007 and the main housing 100 of the wheel-side reducer assembly are integrated together, the ring gear body 200 is separated from the main housing 100, and the ring gear body 200 is used in conjunction with the brake piston assembly, and the friction plate group is arranged between the brake piston assembly and the wheel hub body 002. When braking, the brake piston assembly relies on the ring gear to provide axial support. During the transmission process, the ring gear body 200 meshes with the planetary gear 006 and is subjected to the torque transmitted by the planetary gear 006. In this way, the ring gear body 200 is simultaneously subjected to the axial force during braking and the radial force when the planetary gear 006 transmits the torque. The ring gear body 200 is subjected to complex forces, and has high requirements on the strength and processing accuracy of the components, and the processing and manufacturing cost is high.

[0041] In view of this, the designer provides a wheel-side reduction housing 001 body, which has a simple structure, reduces the difficulty of processing and manufacturing, reduces the processing and manufacturing cost, has simple force, and improves stability and reliability during operation.

[0042] Please combine Figure 1-Figure 4 In this embodiment, the wheel-side reduction housing 001 includes a main housing 100 and a ring gear body 200. The main housing 100 is provided with an assembly cavity 101. The ring gear body 200 is fixed to the cavity wall of the assembly cavity 101. The ring gear body 200 and the main housing 100 are relatively fixed in the circumferential direction of the ring gear body 200.

[0043] Based on the above, the working mode of the wheel reduction housing 001 provided in this embodiment is as follows:

[0044] During assembly, the main housing 100 is connected with the hub body 002, the ring gear body 200 is meshed with the planetary gear 006, the half shaft 003 transmits the torque to the center wheel 005, and the center wheel 005 drives the planetary gear 006 to rotate. Since the ring gear body 200 is fixed to the main housing 100, and the planetary support 007 on which the planetary gear 006 is installed is fixed to the support shaft 004, the planetary support 007 will not rotate under the drive of the planetary gear 006. Correspondingly, the ring gear body 200 rotates with the main housing 100, thereby driving the hub body 002 to rotate and realize torque output. Since the main housing 100 and the ring gear body 200 are fixed together, the main housing 100 is separated from the planetary support, and the main housing 100 and the planetary support are independently set, which reduces the difficulty of processing and manufacturing, reduces the processing and manufacturing cost, and improves the convenience of assembly. Since the ring gear body 200 is separated from the brake cylinder, during the operation of the wheel-side reducer assembly, the ring gear body 200 is subjected to radial force and the brake cylinder is subjected to axial force. The force on the ring gear body 200 and the force on the brake cylinder do not interfere with each other, the force is simple, and the movement of the wheel-side reducer assembly is stable and reliable.

[0045] The following embodiments illustrate the details of the wheel-side reduction housing 001 provided in the present application by way of examples.

[0046] In this embodiment, the main housing 100 and the gear ring body 200 are optionally configured as an integral structure, which has high structural strength, is easy to manufacture, and has a long service life. For example, the main housing 100 and the gear ring body 200 can be integrally formed, or the main housing 100 and the gear ring body 200 can be welded and fixed together.

[0047] Please combine Figure 1 and Figure 2 Optionally, the cross-sectional profile of the main housing 100 is annular, and the assembly cavity 101 of the main housing 100 is set as a cylindrical cavity with both ends open, and the axis of the assembly cavity 101 is collinear with the axis of the gear ring body 200. For the convenience of description, the two ends of the main housing 100 in the axial direction of the gear ring body 200 are respectively the first port 102 and the second port 103, and the position of the main housing 100 corresponding to the first port 102 is set as an outward-turned annular folding edge 110, the annular folding edge 110 is a circular ring structure, and the axis of the annular folding edge 110 is collinear with the axis of the gear ring body 200. A plurality of through holes 111 are opened on the annular folding edge 110, and the through holes 111 can be circular holes. The number of through holes 111 is designed as needed. The plurality of through holes 111 are evenly spaced and arranged in the circumferential direction of the annular folding edge 110, and each through hole 111 can be penetrated with bolts and other fastening parts for connecting with the hub body 002.

[0048] Optionally, the end surface of the main housing 100 corresponding to the second port 103 is provided with an annular positioning groove 104 and a plurality of first assembly holes 105. The inner side of the annular positioning groove 104 is connected to the assembly cavity 101. The first assembly holes 105 may be threaded holes, the number of the first assembly holes 105 may be set as required, and the plurality of first assembly holes 105 may be evenly spaced and arranged in the circumferential direction of the second port 103. In addition, the plurality of first assembly holes 105 are located outside the annular positioning groove 104. An annular sealing body 600 is provided in the annular positioning groove 104, and the annular sealing body 600 may be, but not limited to, a rubber ring. The cross-sectional profile of the rubber ring may be O-shaped or V-shaped, etc.

[0049] It should be noted that the gear ring body 200 is formed at a position of the main shell 100 close to the second port 103 . The thickness of the main shell 100 corresponding to the gear ring body 200 is relatively thick and has high structural strength, which provides space for the setting of the first assembly hole 105 and the annular positioning groove 104 .

[0050] In this embodiment, the wheel-side reduction housing 001 optionally further includes an end plate 300, a locking member 400 and a distance adjusting member 500. The end plate 300 is detachably connected to the main housing 100 through the locking member 400, so that the end plate 300 can open or close the second port 103. When the second port 103 is opened, it is convenient to perform operations such as overhaul or replacement of parts from the second port 103, reduce the difficulty of disassembly and assembly, and improve the efficiency of overhaul or maintenance. When the second port 103 is closed, the main housing 100 and the end plate 300 are sealed by the annular sealing body 600, and the sealing performance at the connection position between the main housing 100 and the end plate 300 is good, and external impurities are not easy to enter the main housing 100, and the internal lubricating oil is not easy to leak from the second port 103. The distance adjusting member 500 is connected to the end plate 300, and the distance adjusting member 500 is used to abut against the end face of the half shaft 003 inserted in the assembly cavity 101 to limit the degree of freedom of the half shaft 003 in its own axial direction. At the same time, the positions of the distance adjusting member 500 and the end plate 300 in the axial direction of the gear ring body 200 are adjustable, so as to adjust the contact state between the distance adjusting member 500 and the half shaft 003, which is flexible to use.

[0051] Optionally, the end plate 300 includes an integrated cover body 310 and a positioning protruding ring 320, the cover body 310 is a circular plate structure, the positioning protruding ring 320 is a circular ring structure, the positioning protruding ring 320 is convexly arranged on a plate surface of the cover body 310, and the axis of the positioning protruding ring 320 is colinear with the axis of the cover body 310. An adjustment hole 311 is arranged in the middle of the cover body 310, and the adjustment hole 311 can be a threaded hole. The distance adjusting member 500 is installed in the threaded hole, and the distance adjusting member 500 and the threaded hole can be screwed together, so that the depth of the distance adjusting member 500 extending into the assembly cavity 101 can be adjusted by rotating the distance adjusting member 500, thereby adjusting the distance between the distance adjusting member 500 and the end face of the half shaft 003. During operation, the half shaft 003 contacts the distance adjusting member 500, and the distance adjusting member 500 is worn. When the distance adjusting member 500 is worn, there is a gap between the distance adjusting member 500 and the end face of the half shaft 003. When the gap is generated, the half shaft 003 is prone to axial movement during movement. At this time, by rotating the distance adjusting member 500, the distance adjusting member 500 can be brought into contact with the end face of the half shaft 003 to make up for the gap caused by the wear of the distance adjusting member 500, thereby improving the limiting effect of the distance adjusting member 500. After the distance adjusting member 500 rotates, the distance adjusting member 500 and the adjustment hole 311 are threadedly matched, which has a self-locking function. When the distance adjusting member 500 is subjected to the axial force of the half shaft 003, it will not slide relative to the adjustment hole 311, and the position of the distance adjusting member 500 is stable and reliable.

[0052] It should be noted that the wear resistance of the distance adjusting member 500 is stronger than that of the cover body 310 .

[0053] Optionally, the cover body 310 is further provided with a plurality of second assembly holes 312 evenly spaced and arranged around the positioning convex ring 320, and the number of the second assembly holes 312 is equal to the number of the first assembly holes 105 and they are connected one by one. The number of the locking members 400 is consistent with the number of the first assembly holes 105 or the second assembly holes 312, and a locking member 400 is inserted into the paired first assembly hole 105 and the second assembly hole 312. The locking member 400 can be, but is not limited to, a bolt, etc. When the end plate 300 is aligned with the main housing 100, the locking member 400 is passed through the second assembly hole 312 and screwed to the first assembly hole 105, so that the disassembly and assembly operation is convenient.

[0054] Please combine Figure 3 and Figure 4 At the same time, when assembling the end plate 300 and the main housing 100, the positioning protruding ring 320 is inserted into the second port 103 and contacts the cavity wall of the assembly cavity 101. The outer peripheral surface of the positioning protruding ring 320 and the plate surface of the cover body 310 are both in contact with the annular sealing body 600, increasing the contact area and improving the sealing effect. At the same time, the cover body 310 contacts the end surface where the second port 103 is located. The cover body 310 and the main housing 100 are detachably connected through the locking member 400, and the cover body 310 can open or close the second port 103. Since the positioning protruding ring 320 is inserted into the second port 103, the outer peripheral surface of the positioning protruding ring 320 contacts the inner wall surface of the second port 103, that is, the cavity wall of the assembly cavity 101, and the radial freedom of the end plate 300 and the main housing 100 in the gear ring body 200 is limited, and the end plate 300 will not move radially relative to the main housing 100. The two are firmly and reliably matched and are not easy to loosen. Furthermore, after the positioning protruding ring 320 is inserted into the second port 103, it is only necessary to adjust the circumferential position of the end plate 300 and the main housing 100 on the gear ring body 200 so that the first assembly hole 105 and the second assembly hole 312 are aligned, and the locking piece 400 is inserted into the corresponding first assembly hole 105 and the second assembly hole 312. The positioning operation of the end plate 300 and the main housing 100 is convenient, the positioning time is short, and the assembly efficiency is high.

[0055] The wheel-side reduction housing 001 provided in this embodiment fixes the main housing 100 and the ring gear body 200 together, separates the ring gear body 200 and the brake cylinder, and the forces on the ring gear body 200 and the brake cylinder do not interfere with each other. The forces on the two are simple, and the requirements for processing accuracy are low, which reduces the processing and manufacturing costs and can also improve the stability and reliability of the reducer assembly operation.

[0056] Please combine Figure 3This embodiment also provides a wheel-side speed reducer assembly, including a wheel-side speed reducer housing 001, a hub body 002, a half shaft 003, a support shaft 004, a center wheel 005, a planetary gear 006, a bracket 007 and a brake device 008. The wheel-side speed reducer housing 001 is connected to the hub body 002, the half shaft 003 is inserted into the support shaft 004 and the two are rotatably matched, the support shaft 004 is inserted into the main housing 100 and the hub body 002 and can rotate relative to the hub body 002. The center wheel 005 is mounted on the half shaft 003, the planetary gear 006 is mounted on the bracket 007, the bracket 007 is fixed on the support shaft 004, and the planetary gear 006 is meshed with the ring gear body 200 and the center wheel 005 at the same time. The brake device 008 includes a piston assembly, a static friction plate group and a dynamic friction plate group. The piston assembly is mounted on the support shaft 004. The static friction plate group can be mounted on the support shaft 004 through a spline sleeve, and the dynamic friction plate group is mounted on the hub body 002. The static friction plate group and the dynamic friction plate group are arranged alternately. During operation, the half shaft 003 transmits the torque to the center wheel 005, and the center wheel 005 drives the planetary gear 006 to rotate. Since the bracket 007 is fixed, under the cooperation of the planetary gear 006 and the bracket 007, the ring gear body 200 rotates around the sun gear, driving the main housing 100 and the hub body 002 to rotate, and realizing torque output. Since the ring gear body 200 is separated from the piston assembly, the ring gear body 200 and the piston assembly are subjected to very simple forces, which reduces the precision requirements for the processing of parts, reduces the processing and manufacturing costs, and can improve the stability of the operation of the wheel-side reducer assembly.

[0057] 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 wheel-side reduction housing, characterized in that: include: A main housing (100) and a ring gear body (200), wherein the main housing (100) is provided with an assembly cavity (101), the ring gear body (200) is fixed to the cavity wall of the assembly cavity (101), and the ring gear body (200) and the main housing (100) are relatively fixed in the circumferential direction of the ring gear body (200).

2. The wheel reduction housing according to claim 1, characterized in that: The main housing (100) and the gear ring body (200) are arranged as an integral structure.

3. The wheel reduction housing according to claim 1, characterized in that: The main housing (100) has a first port (102) and a second port (103) which are arranged relatively to each other in the axial direction of the gear ring body (200); the first port (102) is provided with an outward-turned annular folded edge (110), and the annular folded edge (110) is used for fixed connection with the hub body (002); the gear ring body (200) is arranged close to the second port (103).

4. The wheel reduction housing according to claim 3, characterized in that: The wheel-side reduction housing (001) further comprises an end plate (300), wherein the end plate (300) is connected to the main housing (100), and the end plate (300) is used to open or close the second port (103).

5. The wheel reduction housing according to claim 4, characterized in that: The end surface of the main shell (100) corresponding to the second port (103) is provided with a plurality of first assembly holes (105), and the end plate (300) is provided with a plurality of second assembly holes (312). The plurality of first assembly holes (105) are matched and connected with the plurality of second assembly holes (312) in a one-to-one correspondence, and locking members (400) for fixing the main shell (100) and the end plate (300) are inserted into the connected first assembly holes (105) and the second assembly holes (312).

6. The wheel reduction housing according to claim 4, characterized in that: The end plate (300) comprises an integrated cover body (310) and a positioning protruding ring (320); the positioning protruding ring (320) is protruding from the plate surface of the cover body (310); the positioning protruding ring (320) is inserted into the second port (103) and contacts the cavity wall of the assembly cavity (101); the cover body (310) contacts the end surface where the second port (103) is located, and the cover body (310) is connected to the main shell (100).

7. The wheel reduction housing according to claim 6, characterized in that: An annular positioning groove (104) communicating with the assembly cavity (101) is arranged on the end surface where the second port (103) is located. The annular positioning groove (104) extends around the axis of the gear ring body (200). An annular sealing body (600) is arranged in the annular positioning groove (104). The annular sealing body (600) is in contact with the cover body (310) and the positioning protruding ring (320) at the same time.

8. The wheel reduction housing according to any one of claims 4 to 7, characterized in that: The end plate (300) is provided with an adjustment hole (311), and a distance adjusting member (500) is installed in the adjustment hole (311). The position of the distance adjusting member (500) in the axial direction of the adjustment hole (311) is adjustable, and the distance adjusting member (500) can be locked relative to the end plate (300) after being adjusted relative to the adjustment hole (311), so as to limit the distance adjusting member (500) from sliding relative to the end plate (300) when subjected to an axial force.

9. The wheel reduction housing according to claim 8, characterized in that: The distance adjusting member (500) is threadedly engaged with the adjusting hole (311).

10. A wheel reducer assembly, characterized in that: The wheel reducer assembly comprises: The wheel reduction housing (001) according to any one of claims 1 to 9.

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