Differential mechanism, four-wheel drive system, chassis assembly and tractor
Through the transmission connection of the flange ring mounting seat and linkage shaft, the problem of the differential loose bearings under harsh road conditions is solved, the four-wheel drive system structure is simplified, and the chassis ground clearance and system stability are improved.
Patent Information
- Application Number
- CN202420532868.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-19
AI Technical Summary
The differential is easily damaged by loose bearings under harsh road conditions, and the transmission shaft between the front axle and the rear axle needs to be equipped with a transfer box, resulting in a reduction in the chassis ground clearance.
The differential body is installed with a flange ring mount, and the transmission connection is achieved through the linkage shaft and the umbrella transmission gear, which avoids the use of the transfer box and enhances the stability of the bearing and the structural simplicity of the four-wheel drive system.
It improves the installation stability of the differential and the ground clearance of the chassis, adapts to the operating needs of harsh working conditions, and simplifies the structure of the four-wheel drive system.
Smart Images
Figure CN222163446U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tractors, and in particular relates to a differential mechanism, a four-wheel drive system, a chassis assembly and a tractor. Background Art
[0002] The differential is an important component of the front and rear axles of four-wheel drive vehicles. Currently, the differential is mostly installed on the vehicle body through the bearing seat. When the vehicle chassis is running on harsh road conditions, the bearing seat will loosen, causing bearing damage and other faults, which occur frequently. In addition, the drive shaft between the differentials of the front and rear axles currently needs to be equipped with a transfer case when transmitting power. The transfer case is large in size and will reduce the ground clearance of the chassis. Utility Model Content
[0003] In order to solve the above technical problems, one of the objectives of the utility model is to provide a differential mechanism that uses a flange ring type mounting seat to mount the differential body.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a differential mechanism includes a differential body and two mounting seats, both of which are flange ring structures, and the left and right ends of the differential body are coaxially rotatably connected to the inner holes of the two mounting seats.
[0005] The beneficial effect of the above technical solution is that the differential body is installed through the flange ring-shaped mounting seat, so that the installation effect of the entire differential on the chassis is better, especially able to adapt to the working needs of harsh working conditions.
[0006] In the above technical solution, a tubular plug-in interface is coaxially protruded at the inner hole corresponding to the side where the two mounting seats are close to each other, and a plug-in tube is coaxially protruded at the axial holes at both ends of the differential body, and the two plug-in tubes are coaxially inserted into the corresponding plug-in interfaces, and a bearing is coaxially clamped between each plug-in tube and the corresponding plug-in interface, and an annular stop ring is installed at one end of the inner holes of the two mounting seats that are away from each other, and the stop ring is abutted against the stator ring of the corresponding bearing.
[0007] The beneficial effect of the above technical solution is that the two ends of the differential body and the two mounting seats are rotatably connected through the bearings, and the retaining ring can abut against the end of the bearing away from the differential body, so that the bearing is more stable and the bearing is not easy to move on the plug-in tube.
[0008] The stop ring described in the above technical solution includes an abutment ring and a retaining ring. The abutment ring is coaxially embedded in the corresponding plug-in interface and abuts against the stator ring of the corresponding bearing. The retaining ring is coaxially fixedly installed on the side of the corresponding mounting seat away from the other mounting seat, and the aperture of its inner hole is smaller than the aperture of the inner hole of the plug-in interface, and it abuts against the end of the abutment ring away from the bearing.
[0009] The beneficial effect of the above technical solution is that the abutment ring can abut against the bearing in the plug-in port, and the retaining ring abuts against the abutment ring at the opening of the plug-in port, which can further prevent the bearing from loosening and moving on the plug-in tube.
[0010] In the above technical solution, the inner hole of the retaining ring is turned inwards until it abuts against the inner wall of the abutting ring.
[0011] The beneficial effect of the above technical solution is that the retaining ring can better limit the abutting ring.
[0012] A second purpose of the present invention is to provide a four-wheel drive system with a simple structure and a simple transmission structure.
[0013] In order to achieve the above-mentioned purpose, another technical solution of the utility model is as follows: a four-wheel drive system, including a linkage shaft and two differential mechanisms as described above, the differential body having an umbrella-shaped input gear, the two differential mechanisms being arranged at intervals along the front-to-back direction, the linkage shaft being arranged between the two differential mechanisms along the front-to-back direction, and an umbrella-shaped transmission gear meshing with the corresponding umbrella-shaped input gear being respectively provided at both ends of the linkage shaft.
[0014] The beneficial effect of the above technical solution is that the two differential structures are connected through the linkage shaft and the two bevel transmission gears, so that there is no need to set a transfer case between the two, thereby simplifying the structure of the entire four-wheel drive system.
[0015] In the above technical solution, the diameter of the bevel input gear is larger than the diameter of the bevel transmission gear.
[0016] The beneficial effect of the above technical solution is that it enables reduction transmission between the linkage shaft and the differential body to increase the torque.
[0017] The linkage shaft in the above technical solution comprises two sub-shaft bodies, one end of the two sub-shaft bodies are rotatably connected through a universal joint, and the other ends of the two sub-shaft bodies respectively constitute the two ends of the linkage shaft.
[0018] The beneficial effect of the above technical solution is that the front axle can be steered more flexibly relative to the rear axle.
[0019] A third object of the present utility model is to provide a chassis assembly including the four-wheel drive system as described above.
[0020] The beneficial effect of the above technical solution is that the chassis assembly has a high ground clearance.
[0021] A fourth object of the present utility model is to provide a tractor comprising the chassis assembly as described above.
[0022] The beneficial effect of the above technical solution is that the tractor has a high ground clearance. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic structural diagram of the differential mechanism described in Example 1 of the utility model;
[0024] Figure 2 It is a partial structural schematic diagram of the differential structure described in Example 1 of the utility model;
[0025] Figure 3 It is a cross-sectional view of the stop ring described in Example 1 of the utility model;
[0026] Figure 4 This is a schematic diagram of the structure of the four-wheel drive system described in Example 2 of the utility model;
[0027] Figure 5 This is a schematic structural diagram of the first subsection and the second subsection of the universal joint described in Example 2 of the utility model when they are separated;
[0028] Figure 6 This is a cross-sectional view of the universal joint when connected as described in Example 2 of the utility model.
[0029] In the figure: 1. differential body; 11. plug-in tube; 12. umbrella-shaped input gear; 2. mounting seat; 21. plug-in interface; 22. avoidance groove; 221. screw hole; 3. bearing; 4. retaining ring; 41. abutment ring; 42. retaining ring; 421. through hole; 43. bolt; 100. differential mechanism; 200. linkage shaft; 210. sub-shaft body; 220. universal joint; 221. first sub-section; 222. strip hole; 223. limit shaft; 224. second sub-section; 300. umbrella-shaped transmission gear. DETAILED DESCRIPTION
[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.
[0031] Example 1
[0032] like Figure 1 As shown, this embodiment provides a differential mechanism, including a differential body 1 and two mounting seats 2, both of which are flange ring structures, and the left and right ends of the differential body 1 are respectively coaxially rotatably connected with the inner holes of the two mounting seats 2, so that the differential body is installed through the flange ring mounting seat, which makes the installation effect of the entire differential on the chassis better, especially able to adapt to the working needs of harsh working conditions.
[0033] In the above technical scheme, a tubular plug-in interface 21 is coaxially protruded at the inner hole corresponding to the side where the two mounting seats 2 are close to each other, and a plug-in tube 11 is coaxially protruded at the axial holes at both ends of the differential body 1, and the two plug-in tubes 11 are coaxially inserted into the corresponding plug-in interfaces 21, and a bearing 3 is coaxially clamped between each plug-in tube 11 and the corresponding plug-in interface 21, and an annular stop ring 4 is installed at one end of the inner holes of the two mounting seats 2 that are away from each other, and the stop ring 4 is abutted against the stator ring of the corresponding bearing 3, so that the two ends of the differential body and the two mounting seats are rotatably connected through the bearing, and the stop ring can abut against the end of the bearing away from the differential body, so that the stability of the bearing is better and the bearing is not easy to move on the plug-in tube.
[0034] like Figure 1 and Figure 2 As shown, the stop ring 4 in the above technical solution includes an abutment ring 41 and a retaining ring 42, the abutment ring 41 is coaxially embedded in the corresponding plug-in port 21, and abuts against the stator ring of the corresponding bearing 3, the retaining ring 42 is coaxially fixedly installed on the side of the corresponding mounting seat 2 away from the other mounting seat 2, and the aperture of its inner hole is smaller than the aperture of the inner hole of the plug-in port 21, and abuts against the end of the abutment ring 41 away from the bearing 3, so that the abutment ring can abut against the bearing in the plug-in port, and the retaining ring abuts against the abutment ring at the opening of the plug-in port, which can further prevent the bearing from loosening and moving on the plug-in tube.
[0035] In the above technical solution, the inner hole of the retaining ring 42 is turned inwards until it abuts against the inner wall of the abutting ring 41, so that the retaining ring can better limit the abutting ring.
[0036] Preferably, Figure 3 As shown, the middle part of the mounting seat is recessed toward one side of the differential body to form an avoidance groove 22, and the plug interface is located in the middle part of the bottom wall of the avoidance groove 22, so that the mounting seat is away from the prediction of the differential body and is installed in close contact with the chassis. At the same time, a plurality of screw holes are recessed on the bottom wall of the avoidance groove around the plug interface in an annular direction, and a plurality of through holes are arranged in an annular direction at intervals on the edge of the retaining ring. The plurality of through holes correspond to the plurality of screw holes one by one, and each of the through holes corresponds to the corresponding screw hole one by one and is aligned with each other, and a bolt threadedly connected to the screw hole is inserted, so that the retaining ring can be installed in the avoidance groove, and the aperture of the inner hole of the retaining ring needs to be larger than the diameter of the axle (wheel axle) (the inner hole of the retaining ring is larger than the diameter of the inner hole of the bearing), so that the retaining ring does not affect the axle passing through the retaining ring to connect with the corresponding power output end of the differential body.
[0037] Example 2
[0038] like Figure 4 As shown, this embodiment provides a four-wheel drive system, including a linkage shaft 200 and two differential mechanisms 100 as described in Example 1, the differential body 1 has an umbrella-shaped input gear 12, the two differential mechanisms 100 are arranged at intervals along the front-to-back direction, the linkage shaft 200 is arranged between the two differential mechanisms 100 along the front-to-back direction, and both ends of the linkage shaft 200 are respectively provided with an umbrella-shaped transmission gear 300 meshing with the corresponding umbrella-shaped input gear 12, so that the two differential structures are connected through the linkage shaft and the two umbrella-shaped transmission gears, so that there is no need to set a transfer case between the two, thereby simplifying the structure of the entire four-wheel drive system.
[0039] In the above technical solution, the diameter of the bevel input gear 12 is larger than the diameter of the bevel transmission gear 300, so that a reduction transmission is achieved between the linkage shaft and the differential body to increase the torque.
[0040] The linkage shaft 200 in the above technical solution includes two sub-axles 210, one end of the two sub-axles 210 is rotatably connected through a universal joint 220, and the other ends of the two sub-axles 210 respectively constitute the two ends of the linkage shaft 200, so that the front axle can be turned more flexibly relative to the rear axle.
[0041] The universal joint used in this embodiment can realize swinging and has a certain telescopic margin, so that the whole four-wheel drive system can adapt to the transmission needs of the twisting waist tractor.
[0042] Among them, Figure 5 and Figure 6 As shown, the universal joint 220 includes a first sub-section 221 and a second sub-section 224, the first sub-section 221 has a strip hole 222 (the strip hole is preferably a waisted hole) arranged along its length direction, the second sub-section 224 is a U-shaped part, one end of the first sub-section 221 is inserted into the groove of the second sub-section 224, and a limiting shaft 223 passing through the strip hole 222 is arranged in the groove of the second sub-section 224, the two ends of the limiting shaft 223 are connected to the two side groove walls of the groove end of the second sub-section 224 (the groove depth of the second sub-section and the length of the strip hole can meet the requirements of the first sub-section and the second sub-section sliding to be close to or away from each other), and the ends of the first sub-section 221 and the second sub-section 224 that are away from each other are respectively connected to the corresponding ends of the sub-axis body, so that the first sub-section 221 and the second sub-section 224 can not only swing relative to each other, but also stretch and retract relative to each other.
[0043] Example 3
[0044] This embodiment provides a chassis assembly including the four-wheel drive system as described in Embodiment 2, and the ground clearance of the chassis assembly is high.
[0045] Example 4
[0046] This embodiment provides a tractor including the chassis assembly as described in Embodiment 3, and the tractor has a high ground clearance.
[0047] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.
Claims
1. A differential mechanism, comprising a differential body (1), characterized in that: It also comprises two mounting seats (2), both of which are flange ring structures, and the left and right ends of the differential body (1) are respectively coaxially rotatably connected to the inner holes of the two mounting seats (2).
2. The differential mechanism according to claim 1, characterized in that: A tubular plug-in interface (21) is coaxially protruded at the inner holes of the two mounting seats (2) on the sides close to each other, and plug-in tubes (11) are coaxially protruded at the axial holes at both ends of the differential body (1). The two plug-in tubes (11) are coaxially inserted into the corresponding plug-in interfaces (21), and a bearing (3) is coaxially clamped between each plug-in tube (11) and the corresponding plug-in interface (21). An annular stop ring (4) is installed at the ends of the inner holes of the two mounting seats (2) that are away from each other, and the stop ring (4) abuts against the stator ring of the corresponding bearing (3).
3. The differential mechanism according to claim 2, characterized in that: The retaining ring (4) comprises an abutment ring (41) and a stop ring (42); the abutment ring (41) is coaxially embedded in the corresponding plug-in interface (21) and abuts against the stator ring of the corresponding bearing (3); the stop ring (42) is coaxially fixedly mounted on the side of the corresponding mounting seat (2) away from the other mounting seat (2), and the aperture of its inner hole is smaller than the aperture of the inner hole of the plug-in interface (21), and abuts against the end of the abutment ring (41) away from the bearing (3).
4. The differential mechanism according to claim 3, characterized in that: The inner hole of the resisting ring (42) is turned inwards until it abuts against the inner wall of the abutting ring (41).
5. A four-wheel drive system, characterized in that: The invention comprises a linkage shaft (200) and two differential mechanisms (100) according to any one of claims 1 to 4, wherein the differential body (1) has a bevel input gear (12), the two differential mechanisms (100) are arranged at intervals along the front-to-back direction, the linkage shaft (200) is arranged between the two differential mechanisms (100) along the front-to-back direction, and each of the two ends of the linkage shaft (200) is provided with a bevel transmission gear (300) meshing with the corresponding bevel input gear (12).
6. The four-wheel drive system according to claim 5, characterized in that: The diameter of the bevel input gear (12) is greater than the diameter of the bevel transmission gear (300).
7. The four-wheel drive system according to claim 6, characterized in that: The linkage shaft (200) comprises two sub-shaft bodies (210), one end of the two sub-shaft bodies (210) are rotatably connected via a universal joint (220), and the other ends of the two sub-shaft bodies (210) respectively constitute two ends of the linkage shaft (200).
8. A chassis assembly, characterized in that: Comprising a four-wheel drive system as described in any one of claims 5-7.
9. A tractor, characterized in that: Comprising the chassis assembly as claimed in claim 8.