Half shaft structure and paddy field operation machine

Abstract

The utility model provides a half shaft structure and a paddy field operation machine. Comprising a half shaft, a flange plate, a sleeve, an oil seal seat and an oil seal assembly. The half shaft is connected with a transmission shaft in the transmission box body and can transmit power in the transmission box to the outside of the transmission box, the flange plate is arranged at the end, away from the transmission device, of the half shaft, the flange plate and the half shaft are of an integrated structure, the half shaft is sleeved with the sleeve, the sleeve extends to the area close to the flange plate from a sleeve of the transmission device, and the half shaft is sleeved with the oil seal seat. One end of the oil seal seat is attached to the sleeve, the other end of the oil seal seat is attached to the flange plate, and the oil seal assembly is arranged between the oil seal seat and the half shaft. Spline connection between an existing driving wheel and a half shaft is changed into flange connection, connection between the driving wheel and the half shaft is guaranteed, looseness of the nut and muddy water entering the end face of the check ring are avoided, the overall structure is simpler, maintenance is more convenient, the muddy water prevention effect can be effectively improved, and then the service life of a gearbox is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and in particular to a half-shaft structure and a paddy field operation machine. Background Technology

[0002] See appendix Figure 1 In related technologies, the half-shaft structure of the gearbox of a paddy field work machine generally adopts a spline connection structure between the drive wheel and the half-shaft and is fixed by a locking bolt located at the end of the half-shaft. However, when the paddy field work machine switches between forward and reverse, there will be relative displacement between the drive wheel and the half-shaft, which will cause the locking nut to loosen and may even cause mud and water to enter the sealing end face, affecting the service life of the gearbox. Therefore, it is necessary to provide a half-shaft structure and a paddy field work machine to overcome the above-mentioned defects. Utility Model Content

[0003] The purpose of this invention is to provide a half-shaft structure and a paddy field operation machine.

[0004] According to one aspect of this utility model, a half-shaft structure is provided, comprising: a half-shaft connected to a transmission shaft inside a transmission housing, capable of transmitting power from inside the transmission housing to the outside of the transmission housing; a flange disposed at the end of the half-shaft away from the transmission device, the flange and the half-shaft being an integral structure; a sleeve sleeved on the outside of the half-shaft, the sleeve extending from the transmission device sleeve to a region close to the flange; a bearing disposed between the sleeve and the half-shaft; an oil seal seat sleeved on the half-shaft, one end of the oil seal seat abutting the sleeve, the other end of the oil seal seat abutting the flange; a first oil seal disposed on the inner surface side of the oil seal seat, the lip of the first oil seal contacting the half-shaft; and a third oil seal disposed on the axial end face of the oil seal seat, the lip of the third oil seal contacting the flange.

[0005] Preferably, the outer circumferential surface of the half-shaft is provided with a first step and a second step in sequence towards the side closer to the flange, the inner circumferential surface of the sleeve is provided with a third step, the bearing is disposed on the first step, one side of the bearing abuts against the second step and the oil seal seat, and the other side of the bearing abuts against the third step.

[0006] Preferably, the outer periphery of the oil seal seat is provided with a mounting part at one end near the sleeve, the mounting part is connected to the end face of the sleeve by a first bolt, and the inner periphery of the oil seal seat is in clearance fit with the half shaft at one end near the flange.

[0007] Preferably, the flange is provided with an annular limiting part on the side near the half shaft, and the oil seal seat is provided with a first abutting part and a second abutting part at both ends respectively. The first abutting part abuts against the end face and inner surface of the sleeve, and the second abutting part is engaged between the mounting part and the half shaft.

[0008] Preferably, the oil seal seat is further provided with a second oil seal, the lip of the second oil seal is in contact with the half shaft, a predetermined gap is left between the first oil seal and the second oil seal, a predetermined gap is left between the second oil seal and the flange, and a first connector is provided on the oil seal seat, the first connector being connected to the predetermined gap formed between the first oil seal and the second oil seal.

[0009] Preferably, the first oil seal is a standard oil seal, the second oil seal is a combination oil seal, and the third oil seal is an end face oil seal.

[0010] Preferably, a second connector is provided on the oil seal seat, and the second connector is connected to the predetermined gap formed between the second oil seal and the flange.

[0011] Preferably, the first connector is provided with a first oil cup, the second connector is provided with a second oil cup, the first oil cup is connected to the first connector and partially placed inside the first connector, and the second oil cup is connected to the second connector and partially placed inside the second connector.

[0012] Preferably, a drive wheel is connected to the flange by a second bolt.

[0013] According to another aspect of the present invention, a paddy field operation machine is provided, including the aforementioned half-shaft structure.

[0014] Compared with the prior art, the half-shaft structure and paddy field operation machine provided by this utility model have the following beneficial effects: This utility model changes the spline connection between the existing drive wheel and half-shaft to a flange connection, which not only ensures the connection between the drive wheel and half-shaft, but also avoids the nut from loosening and the mud and water entering the end face of the retaining ring. Moreover, the overall structure is simpler, maintenance is more convenient, and the mud and water prevention effect can be effectively improved, thereby increasing the service life of the gearbox. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of the half-shaft and the transmission device in the prior art;

[0017] Figure 2 This is a schematic diagram of the half-shaft structure and transmission device in this utility model;

[0018] Figure 3 This is a schematic diagram of the half-shaft structure in this utility model;

[0019] Figure 4 This utility model relates to an oil seal seat and an oil seal assembly (i.e., Figure 3 Local magnification of region A in the middle Figure 1 .

[0020] Figure 5 This utility model relates to an oil seal seat and an oil seal assembly (i.e., Figure 3 Local magnification of region B in the middle Figure 2 .

[0021] Explanation of reference numerals in the attached drawings: 1. Half shaft; 11. First step; 12. Second step; 2. Flange; 21. Limiting part; 3. Sleeve; 31. Third step; 4. Oil seal seat; 41. First abutment part; 42. Second abutment part; 43. Third oil seal; 44. Mounting part; 5. Oil seal assembly; 51. First oil seal; 52. Second oil seal; 53. First connector; 54. First oil cup; 55. Second connector; 56. Second oil cup; 6. Bearing; 7. Drive wheel; 8. First bolt; 9. Second bolt; 9'. Locking bolt. Detailed Implementation

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0024] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0028] See Figures 2 to 5 This embodiment discloses a half-shaft structure, which is mainly used in paddy field operation machines such as tracked harvesters and tractors. The half-shaft structure includes a half-shaft 1, a flange 2, a drive wheel 7, a sleeve 3, an oil seal seat 4, and an oil seal assembly 5.

[0029] See appendix Figure 2 One end of the half-shaft 1 is connected to the drive shaft inside the transmission box, which can transmit the power inside the transmission box to the outside of the transmission box. The flange 2 is located at the end of the half-shaft 1 away from the transmission device. The flange 2 and the half-shaft 1 are an integral structure. The drive wheel 7 is connected to the flange 2 by the second bolt 9. The sleeve 3 is sleeved on the outside of the half-shaft 1. The sleeve 3 extends from the transmission device sleeve 3 to the area close to the flange 2. The oil seal assembly 5 is located between the oil seal seat 4 and the half-shaft 1.

[0030] The spline connection between the existing drive wheel 7 and the half shaft 1 was changed to a flange connection, which not only ensured the connection between the drive wheel 7 and the half shaft 1, but also prevented the second nut from loosening and mud and water from entering the end face of the retaining ring. At the same time, the single locking bolt 9' was adjusted to multiple second bolts 9, the bolt size was reduced, and the torque was reduced accordingly, avoiding the need to use special torque tools to tighten the bolts 9', and the installation method was simpler.

[0031] See appendix Figure 4 , 5The flange 2 is provided with an annular limiting part 21 on the side near the half shaft 1. The oil seal seat 4 is provided with a first abutting part 41 and a second abutting part 42 at both ends. The first abutting part 41 abuts against the end face and inner surface of the sleeve 3. The second abutting part 42 is locked between the mounting part 44 and the half shaft 1, locking the oil seal seat 4 between the sleeve 3 and the flange 2. Even if the half shaft 1 and the drive wheel 7 are relatively displaced, they will not loosen.

[0032] See appendix Figure 4 , 5 An installation part 44 is provided on the outer periphery of the oil seal seat 4 near the end of the sleeve 3. The installation part 44 is connected to the end face of the sleeve 3 by a first bolt 8. The end of the inner periphery of the oil seal seat 4 near the flange 2 is clearance-fitted with the half shaft 1 to lock the oil seal seat 4. A third oil seal 43 is also provided between the contact surface of the second abutment part 42 and the flange 2. The third oil seal 43 is an end face oil seal, forming an end face sealing structure between the half shaft 1 and the oil seal seat 4.

[0033] See appendix Figure 4 , 5 The outer circumferential surface of the half shaft 1 is provided with a first step 11 and a second step 12 in sequence towards the side closer to the flange 2. The inner circumferential surface of the sleeve 3 is provided with a third step 31. The bearing 6 is located on the first step 11, one side of the bearing 6 abuts against the second step 12, and the other side of the bearing 6 abuts against the third step 31.

[0034] Because the axial force on the half-shaft structure is large when the paddy field machine turns, the bearing 6 in this embodiment is a tapered roller bearing 6, which can bear a larger axial force. At the same time, by integrating the flange 2 with the half-shaft 1, the preload structure of the bearing 6 is separated from the locking structure of the drive wheel 7, avoiding changes in the preload of the tapered roller bearing 6 when disassembling and assembling the drive wheel 7, thus preventing any impact on the bearing 6's lifespan.

[0035] See appendix Figure 4 , 5 The oil seal assembly 5 is disposed on the second step portion 11. The oil seal assembly 5 includes a first oil seal 51, a second oil seal 52, a first connector 53, a second connector 55, a first oil cup 54, and a second oil cup 56. The first oil seal 51 and the second oil seal 52 are disposed sequentially on the second step portion 11 from the side of the bearing 6 abutting the second contact portion 42. A predetermined gap is left between the second oil seal 52 and the flange 2. The first connector 53 and the second connector 55 are disposed on the oil seal seat 4. The first connector 53 is connected to the predetermined gap formed between the first oil seal 51 and the second oil seal 52. The second connector 55 is connected to the predetermined gap formed between the second oil seal 52 and the flange 2.

[0036] The first oil seal 51 is a standard oil seal, and the second oil seal 52 is a combination oil seal. Compared with the existing oil seal structure, a labyrinth structure is added between the half-shaft 1 and the oil seal seat 4, and grease is added between the first oil seal 51 and the second oil seal 52 to effectively improve the mud and water prevention effect.

[0037] A first oil cup 54 is provided at the first connector 53, and a second oil cup 56 is provided at the second connector 55. The first oil cup 54 is connected to the first connector 53 and is partially placed inside the first connector 53, while the second oil cup 56 is connected to the second connector 55 and is partially placed inside the second connector 55. By adding grease to the oil cups between the first oil seal 51 and the second oil seal 52, and between the second oil seal 52 and the third oil seal 43, the predetermined gaps are filled, creating internal pressure. This effectively prevents the entry of mud and water, and prevents mud and water from entering the transmission box along the gap between the half-shaft 1 and the sleeve 3, ensuring reliable sealing.

[0038] It will be apparent to those skilled in the art that various modifications and variations can be made to the 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 falling within the scope of the appended claims and their equivalents.

Claims

1. A half shaft structure characterized by, include: The half-shaft is connected to the drive shaft inside the transmission housing and can transmit the power inside the transmission housing to the outside of the transmission housing. A flange is located at the end of the half-shaft away from the transmission device, and the flange and the half-shaft are an integral structure. A sleeve, which is fitted over the outside of the half-shaft and extends from the transmission device sleeve to a region near the flange; A bearing, wherein the bearing is disposed between the sleeve and the half-shaft; An oil seal seat is sleeved on the half shaft, with one end of the oil seal seat attached to the sleeve and the other end attached to the flange; The first oil seal is disposed on the inner surface side of the oil seal seat, and the lip of the first oil seal is in contact with the half shaft; The third oil seal is disposed on the axial end face of the oil seal seat, and the lip of the third oil seal is in contact with the flange.

2. The axle shaft assembly of claim 1, wherein, The outer circumferential surface of the half-shaft is provided with a first step and a second step in sequence towards the flange side, and the inner circumferential surface of the sleeve is provided with a third step. The bearing is located on the first step, one side of the bearing abuts against the second step and the oil seal seat, and the other side of the bearing abuts against the third step.

3. The axle shaft assembly of claim 2 wherein, The oil seal seat has an installation part on its outer periphery near the end of the sleeve. The installation part is connected to the end face of the sleeve by a first bolt. The end of the inner periphery of the oil seal seat near the flange is in clearance fit with the half shaft.

4. The axle shaft assembly of claim 3, wherein: The flange is provided with an annular limiting part on the side near the half shaft. The oil seal seat is provided with a first abutting part and a second abutting part at both ends. The first abutting part abuts against the end face and inner surface of the sleeve, and the second abutting part is engaged between the mounting part and the half shaft.

5. The axle shaft assembly of claim 4 wherein, The oil seal seat is also provided with a second oil seal, the lip of the second oil seal is in contact with the half shaft, a predetermined gap is left between the first oil seal and the second oil seal, a predetermined gap is left between the second oil seal and the flange, and a first joint is provided on the oil seal seat.

6. The axle shaft assembly of claim 5 wherein, The first oil seal is a standard oil seal, the second oil seal is a combination oil seal, and the third oil seal is an end face oil seal.

7. The axle shaft assembly of claim 5 wherein, The oil seal seat is provided with a first connector and a second connector. The first connector is connected to a predetermined gap formed between the first oil seal and the second oil seal, and the second connector is connected to a predetermined gap formed between the second oil seal and the flange.

8. The axle shaft assembly of claim 7 wherein, The first connector is provided with a first oil cup, and the second connector is provided with a second oil cup. The first oil cup is connected to the first connector and is partially placed inside the first connector. The second oil cup is connected to the second connector and is partially placed inside the second connector.

9. The axle shaft assembly of claim 1 wherein, A drive wheel is connected to the flange by a second bolt.

10. A paddy field working machine characterized by comprising: Includes the half-shaft structure as described in any one of claims 1 to 9.

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