Stepless adjustable wheel hub, tractor rear axle and tractor

Abstract

The application relates to the technical field of tractor hubs, in particular to a stepless adjustable hub, a tractor rear axle and a tractor. The hub is composed of a hub shell, a hub inner shell, a first hub block and a second hub block, and the adjacent parts are in contact through conical surfaces; the hub shell and the hub inner shell are fixed together through connecting bolts; the axial force of the bolt connection is transmitted to each contact conical surface, and finally the driving shaft is compressed, so that the torque is transmitted, and the axial size is smaller under the condition of transmitting the same torque. When the track is adjusted, the connecting bolts are loosened, the pressure between the conical surfaces is released, the first hub block and the second hub block are separated, the stepless adjustable hub can move left and right on the driving shaft, so that the track is adjusted.

Description

Technical Field

[0001] This application relates to the field of tractor wheel hub technology, and in particular to a continuously adjustable wheel hub, a tractor rear axle, and a tractor. Background Technology

[0002] Currently, to meet the needs of different agronomic practices, tractors have designed the connection between the rear axle and the drive wheels as a continuously adjustable structure, thereby improving operating efficiency and stability. This eliminates the need to frequently change axles or tires to adapt to different operating modes, saving a significant amount of adjustment time and costs.

[0003] However, existing wheel hub structures are difficult to disassemble and adjust the wheel track. In addition, in order to meet the requirements of large torque transmission, existing wheel hubs are relatively wide, resulting in a small wheel track adjustment range when the drive shaft size remains unchanged. Utility Model Content

[0004] The purpose of this application is to provide a continuously adjustable wheel hub, a tractor rear axle, and a tractor, which makes the disassembly and adjustment of the wheel hub more convenient, reduces its size, saves axial space, and allows for a wider wheel track adjustment range while meeting the requirements of high torque transmission.

[0005] In one aspect, this application provides a continuously adjustable wheel hub, including a wheel hub outer shell, a wheel hub inner shell, a first wheel hub block, and a second wheel hub block; The first hub block and the second hub block are combined to form an annular structure that hugs the drive shaft, and the first hub block and the second hub block are connected by a number of locating pins; The outer surfaces of the first wheel hub block and the second wheel hub block have a first conical surface and a second conical surface with the same taper, so that the first wheel hub block and the second wheel hub block form a structure that is high in the middle and low on both sides; The inner shell of the hub has an inner third conical surface and an outer fourth conical surface, and the third conical surface is in contact with the first conical surface; The hub shell has an inner fifth conical surface and a sixth conical surface, the fifth conical surface being fitted with the second conical surface, and the sixth conical surface being fitted with the fourth conical surface; The outer shell of the wheel hub and the inner shell of the wheel hub are connected by multiple connecting bolts.

[0006] In a preferred embodiment, one of the first hub block and the second hub block is provided with a toothed adjusting screw, which can engage with the teeth on the drive shaft.

[0007] In a preferred embodiment, a flat key for connection to the drive shaft is provided on the inner side of the first hub block and the other of the second hub blocks.

[0008] In a preferred embodiment, a spring is fitted onto the locating pin to provide separate repulsive forces for the first hub block and the second hub block.

[0009] In a preferred embodiment, both the first hub block and the second hub block are semi-circular structures.

[0010] In a preferred embodiment, the angle between the first conical surface and the central axis of the hub is a first included angle, and the angle between the second conical surface and the central axis of the hub is a second included angle; The angles of the first included angle and the second included angle are both 10° to 20°.

[0011] In a preferred embodiment, the angle between the fourth conical surface and the central axis of the hub is the third angle; The angle of the third included angle is 10° to 20°, and the degree of the third angle is not greater than the degree of the first included angle and the second included angle.

[0012] Secondly, this application provides a tractor rear axle, including the continuously adjustable wheel hub, and also includes a drive shaft, a final drive housing, and a rear axle housing; The rear axle housing has a final drive housing at each end, and the two drive shafts are respectively inserted into the two final drive housings. The first hub block and the second hub block are clamped onto the drive shaft to realize the connection between the continuously adjustable hub and the drive shaft.

[0013] In a preferred embodiment, a rack is provided on the drive shaft, and an adjusting screw is passed through one of the first hub block and the second hub block, the adjusting screw engaging with the rack.

[0014] Thirdly, this application provides a tractor, including the aforementioned tractor rear axle.

[0015] Compared with the prior art, this application has the following beneficial effects: The wheel hub consists of a wheel hub outer shell, a wheel hub inner shell, a first wheel hub block, and a second wheel hub block. All adjacent parts are in contact with each other through conical surfaces. The wheel hub outer shell and the wheel hub inner shell are fixed together by connecting bolts. The axial force of the bolt connection is transmitted to each contact conical surface, which ultimately presses the drive shaft, thereby realizing the transmission of torque. Moreover, the axial dimension is smaller when transmitting the same torque.

[0016] When adjusting the wheel track, loosen the connecting bolts to release the pressure between the cone surfaces, and separate the first and second hub blocks, allowing the continuously adjustable hub to move left and right on the drive shaft, thereby achieving the adjustment of the wheel track. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a continuously adjustable wheel hub provided in an embodiment of this application; Figure 2 for Figure 1 Enlarged schematic diagram of each contact surface; Figure 3 This is a schematic diagram of the structure of the tractor rear axle provided in an embodiment of this application; Figure label: 1-Wheel hub outer shell; 2-Wheel hub inner shell; 3-First wheel hub block; 4-Second wheel hub block; 5-Connecting bolt; 6-Flat key; 7-Spring; 8-Positioning pin; 9-Adjusting screw; 10-Hex socket head cap screw; A - First contact surface; A1 - First conical surface; A2 - Third conical surface; B - Second contact surface; B1 - Second conical surface; B2 - Fifth conical surface; C - Third contact surface; C1 - Fourth conical surface; C2 - Sixth conical surface; 11-Infinitely adjustable wheel hub; 12-Drive shaft; 13-Final drive housing; 14-Rear axle housing. Detailed Implementation

[0019] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, but rather, changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted. The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent after understanding the disclosure of this application. Throughout this specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between. As used herein, the term "and / or" includes any one of the relevant items listed and any combination of any two or more of them. Although terms such as "first," "second," and "third" may be used herein to describe individual components, assemblies, regions, layers, or portions, these components, assemblies, regions, layers, or portions are not limited by these terms. More precisely, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as such in the examples may also be referred to as the second component, assembly, region, layer, or part. For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element.Therefore, the term "above" includes both "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly. The terminology used herein is for describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprising," "including," and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. Variations in the shapes shown in the figures may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the figures but include changes in shape that occur during manufacturing. The features of the examples described herein may be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible as will be apparent upon understanding the disclosure of this application.

[0020] like Figure 1 and Figure 2 As shown, this embodiment first provides a continuously adjustable wheel hub, including a wheel hub outer shell 1, a wheel hub inner shell 2, a first wheel hub block 3, and a second wheel hub block 4; The first hub block 3 and the second hub block 4 are combined to form an annular structure for gripping the drive shaft 12, and the first hub block 3 and the second hub block 4 are connected by a number of locating pins 8.

[0021] The outer surfaces of the first hub block 3 and the second hub block 4 have a first conical surface A1 and a second conical surface B1 with the same taper. The first conical surface A1 and the second conical surface B1 make the first hub block 3 and the second hub block 4 form a raised structure with a high middle and low sides. The inner shell 2 of the hub has an inner third conical surface A2 and an outer fourth conical surface C1, wherein the third conical surface A2 fits against the first conical surface A1 to form a first contact surface A; The hub housing 1 has an inner fifth conical surface B2 and a sixth conical surface C2, wherein the fifth conical surface B2 is fitted with the second conical surface B1 to form a second contact surface B, and the sixth conical surface is fitted with the fourth conical surface to form a third contact surface C.

[0022] The angle between the first conical surface A1 and the central axis of the hub is the first included angle, and the angle between the second conical surface B1 and the central axis of the hub is the second included angle; the angles of the first included angle and the second included angle are both 10°~20°.

[0023] The angle between the fourth conical surface C1 and the central axis of the hub is the third included angle; in a preferred embodiment, the angle of the third included angle is 10°~20°, and the degree of the third angle is not greater than the degree of the first included angle and the second included angle.

[0024] The outer shell 1 and the inner shell 2 of the wheel hub are connected by multiple connecting bolts 5, and at least one hex socket head cap screw 10 is also connected between the outer shell 1 and the inner shell 2. In this way, even if the connecting bolts 5 are completely loosened, the outer shell 1 and the inner shell 2 of the wheel hub can still be connected by the hex socket head cap screw 10 and will not completely fall apart.

[0025] A toothed adjusting screw 9 is inserted through the middle of the first hub block 3, and the adjusting screw 9 can mesh with the teeth on the drive shaft 12.

[0026] On the inner side of the second hub block 4, a flat key 6 for connecting to the drive shaft 12 is provided at a position opposite to the adjusting screw 9.

[0027] The first hub block 3 and the second hub block 4 preferably adopt a semi-circular structure, and a spring 7 is sleeved on the positioning pin 8, which can provide separate repulsive forces for the first hub block 3 and the second hub block 4.

[0028] like Figure 3 As shown, this embodiment also provides a tractor rear axle, including the continuously adjustable hub 11, as well as a drive shaft 12, a final drive housing 13, and a rear axle housing 14.

[0029] The two ends of the rear axle housing 13 are respectively bolted to the final drive housing 13. The two drive shafts 12 are respectively inserted into the two final drive housings 13, and the two continuously adjustable hubs 11 are respectively mounted on the two drive shafts 12. Specifically, the first hub block 3 and the second hub block 4 are clamped onto the drive shaft 12, and are pressed together by the hub outer shell 1 and the hub inner shell 2 through a conical surface, thereby realizing the connection between the continuously adjustable hub 11 and the drive shaft 12.

[0030] A rack is installed on the drive shaft 12, and an adjusting screw 9 is installed on the first hub block 3. The adjusting screw 9 meshes with the rack on the drive shaft 12.

[0031] During operation, the engine power is transmitted to the drive shaft 12 through the rear axle, and then to the rear drive wheel through the continuously adjustable wheel hub 11, thereby enabling the tractor to move forward and backward.

[0032] The outer shell 1 and the inner shell 2 of the hub are fixed together by connecting bolts 5. The axial force of the bolt connection is transmitted to the first contact surface A and the second contact surface B, and then to the first hub block 3 and the second hub block 4, which finally presses the drive shaft 12, thereby realizing the transmission of torque. Moreover, the axial dimension is smaller when transmitting the same torque.

[0033] When adjusting the wheel track, loosen the connecting bolt 5. The pressure between the first contact surface A, the second contact surface B, and the third contact surface C is released. The spring 8 between the first hub block 3 and the second hub block 4 can separate them. By rotating the adjusting screw 9, the continuously adjustable hub 11 can move left and right on the drive shaft 12, thereby realizing the adjustment of the wheel track. Because the hub outer shell 1 and the hub inner shell 2 are connected by the hexagon socket screw 10, the continuously adjustable hub 11 will still be connected even if the connecting bolt 5 is completely loosened.

[0034] This embodiment also provides a tractor, including the aforementioned tractor rear axle. This tractor possesses all the advantages of a tractor rear axle, which will not be elaborated further here.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A continuously adjustable wheel hub, characterized in that, Includes a wheel hub outer shell, a wheel hub inner shell, a first wheel hub block, and a second wheel hub block; The first hub block and the second hub block are combined to form an annular structure that hugs the drive shaft, and the first hub block and the second hub block are connected by a number of locating pins; The outer surfaces of the first wheel hub block and the second wheel hub block have a first conical surface and a second conical surface with the same taper, so that the first wheel hub block and the second wheel hub block form a structure that is high in the middle and low on both sides; The inner shell of the hub has an inner third conical surface and an outer fourth conical surface, and the third conical surface is in contact with the first conical surface; The hub shell has an inner fifth cone surface and a sixth cone surface, the fifth cone surface being fitted with the second cone surface, and the sixth cone surface being fitted with the fourth cone surface; The outer shell of the wheel hub and the inner shell of the wheel hub are connected by multiple connecting bolts.

2. The continuously adjustable wheel hub according to claim 1, characterized in that, One of the first hub block and the second hub block is provided with a toothed adjusting screw, which can engage with the teeth on the drive shaft.

3. The continuously adjustable wheel hub according to claim 2, characterized in that, The inner side of the first hub block and the other of the second hub blocks is provided with a flat key for connection with the drive shaft.

4. The continuously adjustable wheel hub according to claim 1, characterized in that, A spring is fitted onto the locating pin to provide separate repulsive forces for the first hub block and the second hub block.

5. The continuously adjustable wheel hub according to claim 1, characterized in that, Both the first hub block and the second hub block have a semi-circular structure.

6. The continuously adjustable wheel hub according to claim 1, characterized in that, The angle between the first conical surface and the central axis of the hub is the first included angle, and the angle between the second conical surface and the central axis of the hub is the second included angle; The angles of the first included angle and the second included angle are both 10° to 20°.

7. The continuously adjustable wheel hub according to claim 6, characterized in that, The angle between the fourth conical surface and the central axis of the hub is the third angle. The angle of the third included angle is 10° to 20°, and the degree of the third included angle is not greater than the degree of the first included angle and the second included angle.

8. A tractor rear axle, characterized in that, The continuously adjustable hub according to any one of claims 1 to 7 further includes a drive shaft, a final drive housing, and a rear axle housing; The rear axle housing has a final drive housing at each end, and the two drive shafts are respectively inserted into the two final drive housings. The first hub block and the second hub block are clamped onto the drive shaft to realize the connection between the continuously adjustable hub and the drive shaft.

9. The tractor rear axle according to claim 8, characterized in that, A rack is provided on the drive shaft, and an adjusting screw is inserted through one of the first hub block and the second hub block, the adjusting screw meshing with the rack.

10. A tractor, characterized in that, Includes the tractor rear axle as described in claim 8 or 9.

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