Quick-release double-wheel structure of tractor

Abstract

The utility model discloses a quick-release double-wheel structure of a tractor, which relates to the technical field of tractors and comprises a half shaft, an outer wheel, an inner wheel, an outer nut and an inner nut, a first shaft section, a second shaft section and a third shaft section are sequentially arranged on the half shaft from outside to inside, and a first spline is arranged on the outer wall of one side, close to a first shaft shoulder, of the first shaft section. A first external thread is arranged on the residual outer wall of the first shaft section; a second spline is arranged on the outer wall, close to one side of the second shaft shoulder, of the second shaft section, and a second external thread is arranged on the remaining outer wall of the second shaft section; the second spline is sleeved with the inner wheel, and the inner nut is installed on the second external thread and abuts against the inner wheel. The first spline is sleeved with the outer wheel, and the outer nut is installed on the first outer thread and abuts against the outer wheel. The locking pieces in the device only comprise the outer nut, the inner nut and the limiting insertion block, the number of operation steps is small during disassembly, quick disassembly of the outer wheel and the inner wheel can be achieved, and the disassembly, assembly, maintenance or replacement efficiency of the double wheels is improved.

Description

Technical Field

[0001] This utility model relates to the field of tractor technology, specifically to a quick-release dual-wheel structure for tractors. Background Technology

[0002] A tractor is a self-propelled machine mainly used in agriculture, industry, and construction. It has traction and driving functions, and its main functions include cultivating land by towing and driving various agricultural implements for operations such as tilling, sowing, fertilizing, and harvesting. It can also be used for transportation by towing trailers or other transport vehicles to transport agricultural products, materials, and equipment. Secondly, it can also be used for power output, as the tractor's power take-off shaft can provide power to other mechanical equipment, such as water pumps and generators.

[0003] In existing technologies, in order to effectively increase the traction of a tractor, the contact area between the tires and the ground is generally increased to reduce the compaction of the ground, which allows for an appropriate increase in the number of wheels. However, the existing connection method between the two wheels is complex and cannot achieve quick disassembly, which reduces the efficiency of disassembling, repairing, or replacing the two wheels. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a quick-release dual-wheel structure for tractors.

[0005] The technical solution of this utility model is: a quick-release dual-wheel structure for a tractor, comprising a half-shaft, an outer wheel, an inner wheel, an outer nut, and an inner nut. The half-shaft is provided with a first shaft segment, a second shaft segment, and a third shaft segment sequentially from the outside in. The outer diameters of the first, second, and third shaft segments increase sequentially. A first shoulder is provided between the first and second shaft segments, and a second shoulder is provided between the second and third shaft segments. A first spline for mounting the outer wheel is provided on the outer wall of the first shaft segment near the first shoulder, and a first external thread adapted to the outer nut is provided on the remaining outer wall of the first shaft segment. A second spline for mounting the inner wheel is provided on the outer wall of the second shaft segment near the second shoulder, and a second external thread adapted to the inner nut is provided on the remaining outer wall of the second shaft segment.

[0006] The inner wheel is fitted onto the second spline, and the inner nut is installed on the second external thread and abuts against the inner wheel; the outer wheel is fitted onto the first spline, and the outer nut is installed on the first external thread and abuts against the outer wheel.

[0007] Preferably, the outer wheel hub has a first spline sleeve adapted to the first spline at its center, the first spline sleeve is fitted onto the first spline, and its two ends abut against the first shaft shoulder and the outer nut respectively; the inner wheel hub has a second spline sleeve adapted to the second spline at its center, the second spline sleeve is fitted onto the second spline, and its two ends abut against the second shaft shoulder and the inner nut respectively.

[0008] Preferably, the length of the first spline sleeve is greater than the length of the first spline, and the length of the second spline sleeve is greater than the length of the second spline.

[0009] Preferably, a fixing seat is fixed to the inner end of the third shaft segment, and multiple axial connecting rods are arranged in a circumferential array on the fixing seat. The outer ends of the connecting rods are all provided with radial limiting insertion holes. Multiple sleeves corresponding to the connecting rods are fixed on the inner walls of the hubs of the outer and inner wheels. Multiple corresponding insertion holes corresponding to the limiting insertion holes are also provided on the inner wall of the outer wheel hub. The connecting rods are inserted into the sleeves of the outer and inner wheels, and limiting blocks are movably inserted into their limiting insertion holes. The outer ends of the limiting blocks are inserted into the corresponding insertion holes.

[0010] Preferably, the inner end of the outer nut is provided with a support plate, and when the outer nut is installed in place, the outer edge of its support plate abuts against the inner ends of multiple limiting blocks.

[0011] Preferably, when the limiting block is inserted into the limiting hole, the outer wall of the limiting block contacts the outer end of the outer wheel sleeve.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] This device features a novel structure. Both the inner and outer wheels are connected to the half-shaft via the spline sleeve and spline engagement, and the sleeve and connecting rod engagement. The connection method is simple and highly reliable. The locking components in this device consist only of an outer nut, an inner nut, and a limit block. Disassembly requires fewer steps and allows for quick disassembly of the outer and inner wheels, improving the efficiency of disassembling, assembling, repairing, or replacing dual wheels. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 for Figure 1 An explosion diagram;

[0016] Figure 3 This is a schematic diagram of the semi-shaft.

[0017] In the diagram: 1. First shaft segment, 2. Second shaft segment, 3. Third shaft segment, 4. First shaft shoulder, 5. Second shaft shoulder, 6. First spline, 7. Second spline, 8. Inner wheel, 9. Outer wheel, 10. Inner nut, 11. Outer nut, 12. First spline sleeve, 13. Second spline sleeve, 14. Fixed seat, 15. Connecting rod, 1501. Limiting insertion hole, 16. Sleeve, 17. Corresponding insertion hole, 18. Limiting insertion block, 19. Support plate. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0019] Reference Figure 1-3 As shown, a tractor quick-release dual-wheel structure includes a half-shaft, an outer wheel 9, an inner wheel 8, an outer nut 11, and an inner nut 10. The half-shaft has a first shaft section 1, a second shaft section 2, and a third shaft section 3 arranged sequentially from the outside in. The outer diameters of the first shaft section 1, second shaft section 2, and third shaft section 3 increase sequentially. A first shoulder 4 is provided between the first shaft section 1 and the second shaft section 2, and a second shoulder 5 is provided between the second shaft section 2 and the third shaft section 3. A first spline 6 for mounting the outer wheel 9 is provided on the outer wall of the first shaft section 1 near the first shoulder 4, and a first external thread adapted to the outer nut 11 is provided on the remaining outer wall of the first shaft section 1. A second spline 7 for mounting the inner wheel 8 is provided on the outer wall of the second shaft section 2 near the second shoulder 5, and a second external thread adapted to the inner nut 10 is provided on the remaining outer wall of the second shaft section 2.

[0020] The inner wheel 8 is fitted onto the second spline 7, and the inner nut 10 is installed on the second external thread and abuts against the inner wheel 8; the outer wheel 9 is fitted onto the first spline 6, and the outer nut 11 is installed on the first external thread and abuts against the outer wheel 9.

[0021] More specifically, the outer wheel 9 has a first spline sleeve 12 at the center of its hub that is adapted to the first spline 6. The first spline sleeve 12 is fitted onto the first spline 6, and its two ends abut against the first shaft shoulder 4 and the outer nut 11, respectively. The inner wheel 8 has a second spline sleeve 13 at the center of its hub that is adapted to the second spline 7. The second spline sleeve 13 is fitted onto the second spline 7, and its two ends abut against the second shaft shoulder 5 and the inner nut 10, respectively.

[0022] In order to prevent the outer wheel 9 and the inner wheel 8 from moving axially on the half shaft, the length of the first spline sleeve 12 is greater than the length of the first spline 6, and the length of the second spline sleeve 13 is greater than the length of the second spline 7.

[0023] During installation, first, the second spline sleeve 13 of the inner wheel 8 is fitted onto the second spline 7. Then, the inner nut 10 is installed on the second external thread, and the inner nut 10 abuts against the second spline sleeve 13, thus completing the installation of the inner wheel 8. Next, the first spline sleeve 12 of the outer wheel 9 is fitted onto the first spline 6. Then, the outer nut 11 is installed on the first external thread, and the outer nut 11 abuts against the first spline sleeve 12, thus completing the installation of the outer wheel 9. During disassembly, only the outer nut 11 and the inner nut 10 need to be removed to achieve quick disassembly of the outer wheel 9 and the inner wheel 8, improving the efficiency of disassembling, assembling, repairing, or replacing the dual wheels. Example 2

[0024] As a preferred embodiment of this utility model, this embodiment adds a connecting rod 15, a sleeve 16, and a limiting block 18 to the first embodiment, specifically:

[0025] In this embodiment, a fixing seat 14 is fixed to the inner end of the third shaft segment 3. Four axial connecting rods 15 are arranged in a circumferential array on the fixing seat 14. The outer ends of the connecting rods 15 are all provided with radial limiting insertion holes 1501. Four sleeves 16 corresponding to the connecting rods 15 are fixed on the inner walls of the hubs of the outer wheel 9 and the inner wheel 8. Four corresponding insertion holes 17 corresponding to the limiting insertion holes 1501 are also provided on the inner wall of the hub of the outer wheel 9. The connecting rods 15 are inserted into the sleeves 16 of the outer wheel 9 and the inner wheel 8, and limiting blocks 18 are movably inserted into their limiting insertion holes 1501. The outer ends of the limiting blocks 18 are inserted into the corresponding insertion holes 17.

[0026] The outer nut 11 has a support plate 19 at its inner end. When the outer nut 11 is installed in place, the outer edge of its support plate 19 abuts against the inner ends of the four limiting blocks 18. The support plate 19 can lock the limiting blocks 18 to prevent them from accidentally coming off. The cooperation between the sleeve 16 and the connecting rod 15 can improve the reliability of the connection between the outer wheel 9, the inner wheel 8 and the half shaft.

[0027] Furthermore, when the limiting plug 18 is inserted into the limiting socket 1501, the outer wall of the limiting plug 18 contacts the outer end of the outer wheel 9 sleeve 16.

[0028] When installing the outer wheel 9, first spline sleeve 12 is fitted onto first spline 6, and sleeve 16 is fitted onto connecting rod 15. Then, limit blocks 18 are installed in limit holes 1501, with their outer ends inserted into corresponding holes 17. Finally, outer nut 11 is installed on the first external thread, and it abuts against first spline sleeve 12. At this point, the outer edge of the outer nut 11 support plate 19 abuts against the inner ends of the four limit blocks 18, completing the installation. For disassembly, first remove outer nut 11, then pull out limit blocks 18 for quick removal of the outer wheel 9.

[0029] Obviously, the inner wheel 8 and the connecting rod 15 can also be connected by adding a limiting plug 18, a limiting plug hole 1501 and a corresponding plug hole 17.

[0030] In summary, this device has a novel structure. Both the inner wheel 8 and the outer wheel 9 are connected to the half shaft through the cooperation of the spline sleeve and the spline, and the cooperation of the sleeve 16 and the connecting rod 15. The connection method is simple and highly reliable. The locking components in this device are only the outer nut 11, the inner nut 10 and the limiting block 18. The operation steps during disassembly are few, and the outer wheel 9 and the inner wheel 8 can be quickly disassembled, which improves the efficiency of disassembling, assembling, repairing or replacing the dual wheels.

[0031] This utility model is not limited to the above-described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model, and the changed content still falls within the protection scope of this utility model.

Claims

1. A tractor quick detach double wheel structure comprising a half shaft, an outer wheel and an inner wheel, characterized in that: Also include the outer nut and the inner nut, the half shaft is sequentially provided with first shaft section, second shaft section and third shaft section from outside to inside, the outer diameter of the first shaft section, second shaft section and third shaft section increases gradually, first shaft section and second shaft section between the first shoulder, second shaft section and third shaft section between the second shoulder;The outer wall of the first shaft section near the first shoulder side is provided with the first spline for installing the outer wheel, the remaining outer wall of the first shaft section is provided with the first outer thread matched with the outer nut;The outer wall of the second shaft section near the second shoulder side is provided with the second spline for installing the inner wheel, the remaining outer wall of the second shaft section is provided with the second outer thread matched with the inner nut; The inner wheel is sleeved on the second spline, the inner nut is installed on the second outer thread, and abuts against the inner wheel;The outer wheel is sleeved on the first spline, the outer nut is installed on the first outer thread, and abuts against the outer wheel.

2. The quick detachable dual wheel structure of a tractor according to claim 1, characterized in that: The outer wheel hub center is provided with the first spline sleeve matched with the first spline, the first spline sleeve is sleeved on the first spline, and the both ends thereof abut against the first shoulder and the outer nut respectively;The inner wheel hub center is provided with the second spline sleeve matched with the second spline, the second spline sleeve is sleeved on the second spline, and the both ends thereof abut against the second shoulder and the inner nut respectively.

3. The quick detachable dual wheel structure of a tractor according to claim 2, characterized in that: The length of the first spline sleeve is greater than the length of the first spline, and the length of the second spline sleeve is greater than the length of the second spline.

4. The quick detachable dual wheel structure of a tractor according to claim 3, characterized in that: The fixed seat is fixed to the inner end of the third shaft section, a plurality of axial connecting rods are arranged in a circumferential array on the fixed seat, the outer ends of the connecting rods are provided with radial limiting insertion holes, the hub inner walls of the outer wheel and the inner wheel are fixed with a plurality of sleeves corresponding to the connecting rods one by one, and a plurality of corresponding insertion holes corresponding to the limiting insertion holes are formed in the hub inner wall of the outer wheel;The connecting rods are inserted and assembled in the sleeves of the outer wheel and the inner wheel, the limiting insertion holes are movably inserted with limiting insertion blocks, and the outer ends of the limiting insertion blocks are inserted and assembled in the corresponding insertion holes.

5. The quick detach dual wheel structure of a tractor according to claim 4, wherein: The inner end of the outer nut is provided with a support disc, and when the outer nut is installed in place, the outer edge of the support disc abuts against the inner ends of the plurality of limiting insertion blocks.

6. The quick detach dual wheel structure of a tractor according to claim 4, wherein: When the limiting insertion blocks are inserted and assembled in the limiting insertion holes, the outer wall of the limiting insertion blocks contacts the outer end of the outer wheel sleeve.

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