Hub reduction gear

Abstract

The utility model provides a hub reduction gear. Comprising a vertical shaft shell body, a vertical shaft shell upper seat, a vertical shaft shell upper end cover and a first lining. The vertical shaft shell upper seat is fixed above the vertical shaft shell main body, the vertical shaft shell upper end cover is sleeved on the vertical shaft shell upper seat, a first oil groove with an annular structure is arranged on the inner surface of the vertical shaft shell upper end cover, the vertical shaft shell upper end cover can rotate along the axis of the vertical shaft shell upper seat, and the first bushing is positioned in a circumferential gap between the vertical shaft shell upper seat and the vertical shaft shell upper end cover. The first bush is arranged in the circumferential gap between the vertical shaft shell upper seat and the vertical shaft shell upper end cover, and the second oil groove is formed in the inner surface of the first bush, so that lubricating oil can enter the space between the first bush and the vertical shaft shell upper seat more easily for lubrication so as to reduce sliding friction force, the service life of the edge wheel speed reducer is prolonged, and the product quality is improved; and the later maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of agricultural machinery transmission, and particularly relates to a wheel side reducer. Background Art

[0002] In the prior art, wheel side reducers are provided at both end parts of the drive front axle of a paddy field operation machine. The wheel side reducer not only undertakes the functions of power transmission and torque output, but also has the function of steering output. Among them, when the steering unit drives the wheel side reducer to steer, sliding friction occurs between the upper seat of the vertical shaft housing and the upper end cover of the vertical shaft housing. Especially during paddy field operations, the steering resistance is greater, and the relatively rotating parts are more likely to be worn and damaged, requiring regular maintenance. Therefore, it is necessary to provide a wheel side reducer to overcome the defects existing above. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a wheel side reducer.

[0004] According to one aspect of the utility model, a wheel side reducer is provided, including: a main body of a vertical shaft housing; an upper seat of the vertical shaft housing, which is fixed above the main body of the vertical shaft housing; an upper end cover of the vertical shaft housing, which is sleeved on the upper seat of the vertical shaft housing, and a first oil groove with an annular structure is arranged on the inner surface of the upper end cover of the vertical shaft housing, and the upper end cover of the vertical shaft housing can rotate along the axis of the upper seat of the vertical shaft housing; a first bushing, which is located in the circumferential gap between the upper seat of the vertical shaft housing and the upper end cover of the vertical shaft housing; the first bushing includes a first bushing body, a second oil groove with a spiral shape arranged on the inner surface of the first bushing body, and a through hole arranged in the circumferential direction of the first bushing body for connecting the first oil groove and the second oil groove.

[0005] Preferably, a first oil seal is further arranged on the connection surface between the upper seat of the vertical shaft housing and the upper end cover of the vertical shaft housing.

[0006] Preferably, the upper end cover of the vertical shaft housing is provided with a first oil injection hole communicated with the first oil groove.

[0007] Preferably, a tightening gasket is arranged in the gap between the top of the upper seat of the vertical shaft housing and the upper end cover of the vertical shaft housing, and a limit bolt is arranged on the upper end cover of the vertical shaft housing, and the lower part of the limit bolt abuts against the tightening gasket.

[0008] Preferably, it further includes: a terminal housing, the upper part of the terminal housing is fixedly connected to the upper end cover of the vertical shaft housing, the lower part of the terminal housing is an integrally formed lower seat of the vertical shaft housing, the lower seat of the vertical shaft housing is sleeved under the vertical shaft housing body, and an annular accommodating groove is formed between the vertical shaft housing body and the lower seat of the vertical shaft housing; a first sealing assembly, the first sealing assembly is arranged in the annular accommodating groove; the first sealing assembly includes a first sealing ring sleeved on the circumference of the vertical shaft housing body, a second sealing ring sleeved on the circumference of the vertical shaft housing body and in contact with the first sealing ring, a first sealing ring arranged between the first sealing ring and the vertical shaft housing body, and a second sealing ring arranged between the second sealing ring and the terminal housing.

[0009] Preferably, the terminal housing is connected to the steering unit to drive the terminal housing to rotate.

[0010] Preferably, a second bushing is further arranged in the circumferential gap between the vertical shaft housing body and the lower seat of the vertical shaft housing; the second bushing includes a second bushing body and a third oil groove with a spiral shape arranged on the inner surface of the second bushing body.

[0011] Preferably, it further includes: an end cover, the end cover is fixedly installed on the outside of the terminal housing; a hub, the hub is installed on the end cover through a bearing, the hub is in transmission connection with a vertical shaft located in the vertical shaft housing and can rotate along the axis of the end cover; a second sealing assembly, the second sealing assembly includes a second oil seal and a third oil seal arranged between the hub and the end cover.

[0012] Preferably, a second oil injection hole is further arranged on the hub, and the second oil injection hole is communicated with the oil cavity formed by the second oil seal and the third oil seal.

[0013] Preferably, it further includes: a vertical shaft, the vertical shaft is arranged inside the vertical shaft housing body, and the vertical shaft is in transmission connection with the drive shaft to transmit the power of the differential assembly to the wheel side reducer; a side shaft, the side shaft is installed in the terminal housing through a bearing, one end of the side shaft close to the vertical shaft is in transmission connection with the vertical shaft through a bevel gear, and a sun gear is arranged at the other end of the side shaft; an internal gear ring, the internal gear ring is fixedly installed between the terminal housing and the end cover; a planetary carrier, the planetary carrier includes a mounting part for installing a gear shaft and a driving part extending axially in a cylindrical shape and fixedly connected to the hub; a planetary gear, the planetary gear is rotatably fixed on the planetary carrier through a gear shaft, and the planetary gear meshes with the sun gear and meshes with the internal gear ring.

[0014] Compared with the prior art, the wheel side reducer provided by the present utility model has the following beneficial effects:

[0015] In the present utility model, a first bushing is provided in the circumferential gap between the upper seat of the vertical shaft housing and the upper end cover of the vertical shaft housing, and a second oil groove is provided on the inner surface of the first bushing. Lubricating oil can more easily enter between the first bushing and the upper seat of the vertical shaft housing for lubrication to reduce sliding friction, extend the service life of the wheel side reducer, improve product quality, and reduce the costs of later maintenance and upkeep. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments:

[0017] Figure 1 is a schematic structural view of the front axle in the present utility model;

[0018] Figure 2 is a structural view of the wheel side reducer in the present utility model;

[0019] Figure 3 is a schematic structural view of the vertical shaft housing in the present utility model;

[0020] Figure 4 is a schematic structural view of the first bushing in the present utility model;

[0021] Figure 5 is a schematic structural view of the first sealing assembly in the present utility model;

[0022] Figure 6 is a schematic structural view of the first sealing ring in the present utility model.

[0023] DESCRIPTION OF THE REFERENCE NUMERALS: 100, wheel side reducer; 200, differential assembly; 300, drive shaft; 1, vertical shaft housing; 11, main body of the vertical shaft housing; 12, upper seat of the vertical shaft housing; 13, upper end cover of the vertical shaft housing; 131, first oil groove; 132, first oil injection hole; 14, first bushing; 141, main body of the first bushing; 142, second oil groove; 143, through hole; 15, shim; 16, limit bolt; 17, first oil seal; 18, lower seat of the vertical shaft housing; 2, end housing; 22, second bushing; 21, first sealing assembly; 211, first sealing ring; 212, second sealing ring; 213, first sealing ring; 214, second sealing ring; 3, end cover; 4, wheel hub; 41, second sealing assembly; 411, second oil seal; 412, third oil seal; 413, second oil injection hole; 51, vertical shaft; 52, side shaft; 53, sun gear; 54, internal gear ring; 55, planet carrier; 551, mounting portion; 552, driving portion; 56, planet gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] To make the drawings concise, only the parts related to the present invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, for components with the same structure or function, only one of them is schematically shown, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean the situation of "more than one".

[0026] It should also be further understood that the term "and / or" used in the description of this application and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0027] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the specific embodiments of the present invention with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can be obtained.

[0030] See Figure 1 , this embodiment provides a front axle for a tractor. With the forward direction of the tractor as the front, the front axle includes a central drive unit, two wheel side reducers 100 located at both ends of the central drive unit, and a steering unit for driving the left and right rotation of the wheel side reducers 100.

[0031] The central drive unit includes a differential assembly 200 drivingly connected to a gearbox, drive shafts 300 located at both ends of the differential assembly 200, and a central drive housing, which transmits the power of the differential assembly 200 to the wheel side reducer 100.

[0032] Refer to the appendix Figure 2 , the vertical shaft housing 1 of the wheel side reducer 100 is connected to the central drive housing and is used for installing the vertical shaft 51. Specifically, the vertical shaft housing 1 includes a vertical shaft housing main body 11, a vertical shaft housing upper seat 12, a vertical shaft housing upper end cover 13, and a first bushing 14. The vertical shaft housing upper seat 12 is fixed above the vertical shaft housing main body 11. The vertical shaft housing upper end cover 13 is sleeved on the vertical shaft housing upper seat 12, and a first oil groove 131 with an annular structure is provided on the inner surface of the vertical shaft housing upper end cover 13. The vertical shaft housing upper end cover 13 can rotate along the axis of the vertical shaft housing upper seat 12.

[0033] Refer to the appendix Figure 2 , 3 , the first bushing 14 is located in the circumferential gap between the vertical shaft housing upper seat 12 and the vertical shaft housing upper end cover 13. Refer to the appendix Figure 4 , the first bushing 14 includes a first bushing body 141, a second oil groove 142 with a spiral shape provided on the inner surface of the first bushing body 141, and a through hole 143 provided on the circumference of the first bushing body 141 for connecting the first oil groove 131 and the second oil groove 142.

[0034] By arranging the first bushing 14 in the circumferential gap between the vertical shaft housing upper seat 12 and the vertical shaft housing upper end cover 13 and arranging the second oil groove 142 on the inner surface of the first bushing 14, lubricating oil can more easily enter between the first bushing 14 and the vertical shaft housing upper seat 12 for lubrication to reduce sliding friction, extend the service life of the wheel side reducer, improve product quality, and reduce the cost of later maintenance.

[0035] The vertical shaft housing upper end cover 13 is provided with a first oil injection hole 132 communicating with the first oil groove 131, and a lubricating oil cup is configured on the first oil injection hole 132 for injecting lubricating grease. A first oil seal 17 is also provided on the connection surface between the vertical shaft housing upper seat 12 and the vertical shaft housing upper end cover 13, so that the circumferential gap between the vertical shaft housing upper seat 12 and the vertical shaft housing upper end cover 13 becomes a closed cavity to prevent the leakage of lubricating oil.

[0036] A tightening gasket 15 is arranged in the gap between the top of the vertical shaft housing upper seat 12 and the vertical shaft housing upper end cover 13, and a limit bolt 16 is arranged on the vertical shaft housing upper end cover 13. The lower part of the limit bolt 16 abuts against the tightening gasket 15, and by adjusting the depth of the limit bolt 16 relative to the vertical shaft housing upper end cover 13, the effect of tightly connecting the vertical shaft housing upper seat 12 and the vertical shaft housing upper end cover 13 can be achieved.

[0037] Refer to the appendix Figure 2, the wheel side speed reducer 100 further includes a terminal housing 2. The upper part of the terminal housing 2 is fixedly connected to the upper end cover 13 of the vertical shaft housing. The lower part of the terminal housing 2 is an integrally formed lower seat 18 of the vertical shaft housing. The lower seat 18 of the vertical shaft housing is sleeved below the main body 11 of the vertical shaft housing, and an annular accommodating groove is formed between the main body 11 of the vertical shaft housing and the lower seat 18 of the vertical shaft housing.

[0038] Refer to the appendix Figure 2 、 5 、6, a first sealing assembly 21 is arranged in the annular accommodating groove. The first sealing assembly 21 includes a first sealing ring 211 sleeved on the circumference of the main body 11 of the vertical shaft housing, a second sealing ring 212 sleeved on the circumference of the main body 11 of the vertical shaft housing and in contact with the first sealing ring 211, a first sealing ring 213 arranged between the first sealing ring 211 and the main body 11 of the vertical shaft housing, and a second sealing ring 214 arranged between the second sealing ring 212 and the terminal housing 2. The first sealing ring 211 and the second sealing ring 212 are metal sealing rings, and the first sealing ring 213 and the second sealing ring 214 are rubber sealing rings. By cooperating the first sealing ring 213 and the second sealing ring 214 with the first sealing ring 211 and the second sealing ring 212, the combination of the main body 11 of the vertical shaft housing and the lower seat 18 of the vertical shaft housing is relatively tight, preventing muddy water from entering the wheel side speed reducer 100 and also preventing oil leakage of the wheel side speed reducer 100.

[0039] The terminal housing 2 is connected to a steering unit (not shown in the figure), driving the terminal housing 2 to rotate, so that the upper end cover 13 of the vertical shaft housing can rotate along the axis of the upper seat 12 of the vertical shaft housing, realizing the steering of the wheel side speed reducer 100.

[0040] A second bushing 22 is also arranged in the circumferential gap between the main body 11 of the vertical shaft housing and the lower seat 18 of the vertical shaft housing. The second bushing 22 includes a second bushing body and a third oil groove with a spiral shape arranged on the inner surface of the second bushing body. Due to the lubricating oil in the wheel side speed reducer 100, the second bushing 22 is partially immersed in the lubricating oil of the wheel side speed reducer 100 to reduce the sliding friction force and extend the service life of the wheel side speed reducer.

[0041] Refer to the appendix Figure 2, the wheel side speed reducer 100 further includes an end cover 3, a hub 4, a second sealing assembly 41 and a second oil injection hole 413. The end cover 3 is fixedly installed on the outer side of the end housing 2. The hub 4 is installed on the end cover 3 through a bearing. The hub 4 is in transmission connection with a vertical shaft 51 located in the vertical shaft housing 1 and can rotate along the axis of the end cover 3. The second sealing assembly 41 includes a second oil seal 411 and a third oil seal 412 provided between the hub 4 and the end cover 3. A second oil injection hole 413 is further provided on the hub 4. The second oil injection hole 413 communicates with the oil chamber formed by the second oil seal 411 and the third oil seal 412. By injecting lubricating oil into the oil chamber formed by the second oil seal 411 and the third oil seal 412, the sliding friction is reduced, and foreign matters are prevented from entering the wheel side speed reducer 100, thereby prolonging the service life of the wheel side speed reducer.

[0042] The wheel side speed reducer 100 further includes: a vertical shaft 51, a side shaft 52, an internal gear ring 54, a planet carrier 55 and planet gears 56. The vertical shaft 51 is arranged inside the main body 11 of the vertical shaft housing, and the vertical shaft 51 is in transmission connection with the drive shaft 300. The side shaft 52 is installed in the end housing 2 through a bearing. One end of the side shaft 52 close to the vertical shaft 51 is in transmission connection with the vertical shaft 51 through bevel gears. A sun gear 53 is provided at the other end of the side shaft 52. The internal gear ring 54 is fixedly installed between the end housing 2 and the end cover 3. The planet carrier 55 includes a mounting portion 551 for mounting a gear shaft and a driving portion 552 extending axially in a cylindrical shape and fixedly connected to the hub 4. The planet gears 56 are rotatably fixed on the planet carrier 55 through gear shafts. The planet gears 56 are engaged with the sun gear 53 and also engaged with the internal gear ring 54.

[0043] It will be obvious to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention falling within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A wheel reducer, characterized in that: include: Vertical shaft housing body; A vertical shaft housing upper seat, wherein the vertical shaft housing upper seat is fixed above the vertical shaft housing main body; The upper end cover of the vertical shaft housing is sleeved on the upper seat of the vertical shaft housing, and a first oil groove with an annular structure is provided on the inner surface of the upper end cover of the vertical shaft housing. The upper end cover of the vertical shaft housing can rotate along the axis of the upper seat of the vertical shaft housing; The first bushing is located in the circumferential gap between the upper seat of the vertical shaft housing and the upper end cover of the vertical shaft housing; the first bushing includes a first bushing body, a second oil groove having a spiral shape and arranged on the inner surface of the first bushing body, and a through hole arranged on the circumference of the first bushing body for connecting the first oil groove and the second oil groove.

2. The wheel reducer according to claim 1, characterized in that: A first oil seal is also arranged on the connecting surface between the upper seat of the vertical shaft housing and the upper end cover of the vertical shaft housing.

3. The wheel reducer according to claim 2, characterized in that: The upper end cover of the vertical shaft housing is provided with a first oil filling hole connected with the first oil groove.

4. The wheel reducer according to claim 3, characterized in that: A tightening gasket is arranged in the gap between the top of the vertical shaft housing upper seat and the vertical shaft housing upper end cover, and a limiting bolt is arranged on the vertical shaft housing upper end cover, and the lower part of the limiting bolt abuts against the tightening gasket.

5. The wheel reducer according to claim 4, characterized in that: Also includes: The end shell, the upper part of which is fixedly connected to the upper end cover of the vertical shaft shell, the lower part of which is an integrally formed vertical shaft shell lower seat, the vertical shaft shell lower seat is sleeved under the vertical shaft shell body, and an annular mounting groove is formed between the vertical shaft shell body and the vertical shaft shell lower seat; A first sealing component, wherein the first sealing component is arranged in the annular receiving groove; the first sealing component comprises a first sealing ring sleeved on the circumference of the vertical shaft shell body, a second sealing ring sleeved on the circumference of the vertical shaft shell body and arranged in contact with the first sealing ring, a first sealing ring arranged between the first sealing ring and the vertical shaft shell body, and a second sealing ring arranged between the second sealing ring and the end shell body.

6. The wheel reducer according to claim 5, characterized in that: The terminal housing is connected to the steering unit to drive the terminal housing to rotate.

7. The wheel reducer according to claim 6, characterized in that: A second bushing is also arranged on the circumferential gap between the vertical shaft housing main body and the vertical shaft housing lower seat; the second bushing includes a second bushing body and a third oil groove arranged on the inner surface of the second bushing body and having a spiral shape.

8. The wheel reducer according to claim 7, characterized in that: Also includes: An end cover, the end cover is fixedly mounted on the outer side of the terminal shell; A wheel hub, the wheel hub is mounted on the end cover through a bearing, the wheel hub is drivingly connected to the vertical shaft located in the vertical shaft housing, and can rotate along the axis of the end cover; The second sealing assembly includes a second oil seal and a third oil seal arranged between the wheel hub and the end cover.

9. The wheel reducer according to claim 8, characterized in that: The wheel hub is also provided with a second oil filling hole, and the second oil filling hole is communicated with the oil cavity formed by the second oil seal and the third oil seal.

10. The wheel reducer according to claim 9, characterized in that: Also includes: A vertical shaft, which is arranged inside the vertical shaft housing body and is drivingly connected to the drive shaft to transmit the power of the differential assembly to the wheel-side reducer; A side shaft, wherein the side shaft is installed in the terminal housing through a bearing, one end of the side shaft close to the vertical shaft is transmission-connected to the vertical shaft through a bevel gear, and a sun gear is arranged at the other end of the side shaft; An inner gear ring, the inner gear ring is fixedly installed between the end housing and the end cover; A planet carrier, the planet carrier comprising a mounting portion for mounting a gear shaft and a driving portion extending axially in a cylindrical shape and fixedly connected to the wheel hub; The planetary gear is rotatably fixed on the planetary carrier through a gear shaft, and the planetary gear is meshed with the sun gear and the inner gear ring.

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