Transfer case assembly and hydrostatic tractor
By installing a return oil lubrication pipe and a radiator in the transfer case, the problems of insufficient lubrication and heat dissipation are solved, thereby improving the service life and reliability of the transfer case and making it suitable for hydrostatic tractors.
Patent Information
- Application Number
- CN202520791725.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-24
AI Technical Summary
Existing transfer cases suffer from insufficient lubrication, poor assemblability, and inability to operate continuously and efficiently, making them particularly unsuitable for hydrostatic tractors.
By setting up return oil lubrication pipes and radiators, combined with return oil pumps, the oil inside the tank is cooled before being transported back into the tank, thereby enhancing the lubrication effect and improving heat dissipation performance.
It achieves full lubrication and heat dissipation of the power transmission components inside the transfer case, extends service life, and meets the needs of hydrostatic tractors.
Smart Images
Figure CN223894970U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of agricultural machinery technology, specifically relating to a transfer case assembly and a hydrostatic tractor. Background Technology
[0002] A transfer case is a device that distributes engine power, sending power to the rear axle or simultaneously to both the front and rear axles. Currently, transfer cases used in construction machinery have several shortcomings: First, they rely primarily on splash lubrication for gears and internal bearings, leading to insufficient lubrication, overheating, accelerated wear, and premature failure. Second, they have poor assemblability, with the number of pump ports insufficient for tractor requirements. Finally, during operation, the high-temperature vaporization of the oil inside the case can easily evaporate from the breather, condense outside the case, and leak at the breather. Additionally, existing transfer cases lack deceleration or timely power distribution capabilities, failing to ensure continuous high-efficiency engine operation. Therefore, existing transfer cases are unsuitable for hydrostatic tractors.
[0003] Therefore, the existing transfer case has the following shortcomings: it uses splash lubrication, resulting in insufficient lubrication of parts; its assemblability cannot meet the needs of tractors; and it cannot guarantee that the engine can continuously operate in the high-efficiency range. Utility Model Content
[0004] The purpose of this utility model is to provide a transfer case assembly and a hydrostatic tractor, which aims to improve the heat dissipation performance of the power transmission components inside the transfer case by arranging an oil return component to dissipate the heat from the oil drawn out of the transfer case before returning it to the transfer case.
[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:
[0006] This utility model provides a transfer case assembly and a hydrostatic tractor, including a housing and a flange fixed to one side of the housing. The housing contains an input shaft, a first power take-off (PTO) shaft, and a second PTO shaft. One end of the input shaft extends outward through the housing and the flange. Both the first and second PTO shafts are connected to the input shaft inside the housing via gear transmission. A first return oil lubrication pipe is provided in the lubrication chamber of the first PTO shaft, a second return oil lubrication pipe is provided in the lubrication chamber of the second PTO shaft, and a third return oil lubrication pipe is provided in the lubrication chamber of the input shaft. A radiator is also provided at the bottom of the housing, and a return oil pump is mounted on the radiator. One end of the return oil pump is connected to the first, second, and third return oil lubrication pipes via pipelines, and the other end of the return oil pump is connected to the return oil port of the housing via a return oil pipe.
[0007] As a further improvement of this utility model, the bottom end of the box is also provided with a fixing hole.
[0008] As a further improvement of this utility model, fixed seats are also provided on both sides of the box.
[0009] As a further improvement of this utility model, the top of the box is also provided with a lifting lug.
[0010] As a further improvement of this utility model, the flange is also provided with weight reduction holes.
[0011] This utility model also provides a hydrostatic tractor, characterized in that it includes the transfer case assembly described above.
[0012] Advantages of this utility model:
[0013] The transfer case assembly and hydrostatic tractor provided by this utility model, by setting up a return oil lubrication pipe, adds forced return oil lubrication on the basis of retaining splash lubrication, so that the lubrication and heat dissipation of the power transmission components inside the case are more sufficient. By setting up a radiator, the oil drawn from the case by the return oil lubrication pipe can be cooled and then transported back to the case, further improving the heat dissipation performance of the power transmission components inside the case. In summary, it can ensure sufficient lubrication and heat dissipation of the power transmission components and improve the service life of the power transmission components. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the transfer case assembly described in this utility model;
[0015] Figure 2 for Figure 1 A schematic diagram of the back structure.
[0016] In the diagram: 101-box body, 1011-fixing hole, 1012-fixing seat, 1013-lifting lug, 102-flange, 1021-weight reduction hole, 103-input shaft, 104-first power take-off shaft, 105-second power take-off shaft, 106-first return oil lubrication pipe, 107-second return oil lubrication pipe, 108-third return oil lubrication pipe, 109-radiator, 1091-return oil pump, 1092-return oil pipe. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.
[0018] This utility model provides a transfer case assembly and a hydrostatic tractor, such as... Figure 1 , Figure 2 As shown, the device includes a housing 101 and a flange 102 fixed to one side of the housing 101. Inside the housing 101 are an input shaft 103, a first power take-off shaft 104, and a second power take-off shaft 105. One end of the input shaft 103 extends outwards through the housing 101 and the flange 102. Both the first power take-off shaft 104 and the second power take-off shaft 105 are connected to the input shaft 103 via gear transmission inside the housing. A first return oil lubrication pipe 106 is provided in the lubrication chamber of the first power take-off shaft 104, a second return oil lubrication pipe 107 is provided in the lubrication chamber of the second power take-off shaft 105, and a third return oil lubrication pipe 108 is provided in the lubrication chamber of the input shaft 103. A radiator 109 is also provided at the bottom of the housing 101, and a return oil pump 1091 is provided on the radiator 109. One end of the return oil pump 1091 is... The oil return pump 1091 is connected to the first return oil lubrication pipe 106, the second return oil lubrication pipe 107, and the third return oil lubrication pipe 108 via pipelines (not shown in the figure). The other end of the return oil pump 1091 is connected to the return oil port of the housing 101 via the return oil pipe 1092. With the above structural arrangement, by setting the return oil lubrication pipe and the heater 109, the oil drawn from the housing by the first return oil lubrication pipe 106, the second return oil lubrication pipe 107, and the third return oil lubrication pipe 108 can be cooled and then transported back to the housing 101 by the return oil pump 1091 through the return oil pipe 1092. This further improves the heat dissipation performance of the power transmission components inside the housing 101, making the lubrication and heat dissipation of the power transmission components inside the housing 101 more sufficient and improving the service life of the power transmission components.
[0019] In one embodiment, the bottom end of the housing 101 is also provided with a fixing hole 1011.
[0020] In one embodiment, the housing 101 is further provided with mounting bases 1012 on both sides.
[0021] In one embodiment, the top of the housing 101 is also provided with a lifting lug 1013.
[0022] In one embodiment, the flange 102 is also provided with a weight reduction hole 1021.
[0023] This utility model also provides a hydrostatic tractor, including the transfer case assembly as described above.
[0024] This specification describes several aspects of at least one embodiment of the present invention. It will be understood that various changes, modifications, and improvements will be readily apparent to those skilled in the art. Such changes, modifications, and improvements are intended to be within the spirit and scope of the present invention.
Claims
1. A transfer case assembly, characterized in that, include: The enclosure includes a housing and a flange fixed to one side of the housing. Inside the housing are an input shaft, a first power take-off shaft, and a second power take-off shaft. One end of the input shaft extends outwards through the housing and the flange. Both the first and second power take-off shafts are connected to the input shaft inside the housing via gear transmission. A first return oil lubrication pipe is located in the lubrication chamber of the first power take-off shaft, a second return oil lubrication pipe is located in the lubrication chamber of the second power take-off shaft, and a third return oil lubrication pipe is located in the lubrication chamber of the input shaft. A radiator is also installed at the bottom of the housing, and a return oil pump is mounted on the radiator. One end of the return oil pump is connected to the first, second, and third return oil lubrication pipes via pipelines, and the other end of the return oil pump is connected to the return oil port of the housing via a return oil pipe.
2. The transfer case assembly as described in claim 1, characterized in that, The bottom of the box is also provided with fixing holes.
3. The transfer case assembly as described in claim 1, characterized in that, The box is also equipped with fixed seats on both sides.
4. The transfer case assembly as described in any one of claims 1 to 3, characterized in that, The top of the box is also equipped with a lifting lug.
5. The transfer case assembly as described in any one of claims 1 to 3, characterized in that, The flange is also provided with weight reduction holes.
6. A hydrostatic tractor, characterized in that, Includes the transfer case assembly as described in claim 1.