Large-tonnage hydraulic torque converter with closed front shell

Abstract

The utility model belongs to the technical field of hydraulic torque converters, and relates to a large-tonnage hydraulic torque converter with a closed front shell, which comprises a front shell, the front shell is sequentially connected with a middle section and a gear box, the middle section is internally connected with a pump hub through a turbine shaft, the pump hub is connected with a torque converter core, the torque converter core is connected with an input shaft, the input shaft is connected with a disc, and the disc is connected with a gear box. A bearing and a sealing assembly are arranged between the input shaft and the front shell. In order to solve the problems of an existing large-tonnage hydraulic torque converter, the partition plate is additionally arranged between the hydraulic torque converter machine core and the engine, the framework oil seal with the small size can be adopted, the relative linear speed at the position of a sealing lip of the framework oil seal is reduced, the double-oil-seal structure is adopted, the service life of the framework oil seal is prolonged, and when the framework oil seal leaks oil, the sealing performance of the framework oil seal is improved. And the framework oil seal can be replaced without disassembling the hydraulic torque converter core, so that the maintenance is convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic torque converters, and relates to a front-shell enclosed large-tonnage hydraulic torque converter. Background Technology

[0002] A hydraulic torque converter is a component that transmits power using the high-speed movement of a fluid. Its operating characteristics are that the input speed and torque are essentially constant, or vary only slightly. The output speed and torque can be greater than, equal to, or less than the input speed and torque, and the output speed and torque can automatically and continuously adjust according to the load of the driven machine. Because hydraulic torque converters have continuously variable speed and torque capabilities, they are widely used as transmission devices between various power machines and driven machines. Currently, to improve the power and climbing ability of large equipment, high-power engines are generally selected. However, due to the limited capacity of existing hydraulic torque converters and their limited ability to absorb engine power, simply increasing engine power cannot effectively improve the power of the loader.

[0003] A Chinese utility model patent with publication number CN217898695U discloses a modular hydraulic torque converter including a transition plate, a gearbox that can be detachably installed on one side of the transition plate, and an intermediate section that can be detachably installed on the other side of the transition plate. A flywheel housing connection part is provided at the end of the intermediate section away from the transition plate, and a torque converter core assembly is provided inside the intermediate section.

[0004] The existing technology has the following technical defects:

[0005] Existing hydraulic torque converters typically use a middle section partition to separate the front housing from the gearbox, with a skeleton oil seal installed at the front housing partition. The torque converter core is located between the front housing partition and the engine. Because large-tonnage hydraulic torque converter cores and pump hubs are relatively large, the skeleton oil seal at the front housing partition is also large. During high-speed rotation of the torque converter core, the relative linear velocity at the sealing lip of this skeleton oil seal is high, easily causing oil leakage. Furthermore, replacing the oil seal is difficult, requiring extensive disassembly of the torque converter core. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a front-shell enclosed large-tonnage hydraulic torque converter.

[0007] The front-casing enclosed large-tonnage hydraulic torque converter of this utility model includes a front casing, a middle section and a gearbox connected in sequence to the front casing, a pump hub connected to the middle section via a turbine shaft, a torque converter core connected to the pump hub, an input shaft connected to the torque converter core, a disc connected to the input shaft, and a bearing and a sealing assembly provided between the input shaft and the front casing.

[0008] An input flange is fixedly connected to the end of the input shaft, and the input flange is connected to the disc through a positioning shaft head.

[0009] The positioning shaft head is provided with an elastic plate, and the disc is connected to the elastic plate.

[0010] The sealing assembly includes a skeleton oil seal disposed between the front housing and the input flange. A smaller skeleton oil seal is used to reduce the relative linear velocity at the sealing lip of the skeleton oil seal.

[0011] The aforementioned skeleton oil seal is provided in two parts, adopting a double oil seal structure, which improves the service life of the skeleton oil seal. When the skeleton oil seal leaks, it can be replaced without disassembling the hydraulic torque converter core, making maintenance convenient.

[0012] A partition is provided between the pump hub and the gearbox.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention addresses the problems of existing large-tonnage hydraulic torque converters by adding a partition between the hydraulic torque converter core and the engine. It allows for the use of smaller skeleton oil seals, reducing the relative linear velocity at the sealing lip of the skeleton oil seal. Furthermore, it employs a double oil seal structure to improve the lifespan of the skeleton oil seal. In the event of oil leakage from the skeleton oil seal, it can be replaced without disassembling the hydraulic torque converter core, thus facilitating maintenance. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0016] In the diagram: 1. Input flange; 2. Skeleton oil seal; 3. Bearing; 4. Front housing; 5. Torque converter core; 6. Pump hub; 7. Baffle plate; 8. Disc; 9. Intermediate section; 10. Gearbox; 11. Turbine shaft; 12. Positioning shaft head; 13. Input shaft; 14. Elastic plate. Detailed Implementation

[0017] Example 1

[0018] like Figure 1As shown, the enclosed large-tonnage hydraulic torque converter with front housing 4 of this utility model includes a front housing 4, a middle section 9 and a gearbox 10 connected sequentially to the front housing 4. A pump hub 6 is connected to the middle section 9 via a turbine shaft 11. The pump hub 6 is connected to the torque converter core 5, the torque converter core 5 is connected to an input shaft 13, and the input shaft 13 is connected to a disc 8. A bearing 3 and a sealing assembly are provided between the input shaft 13 and the front housing 4. An input flange 1 is fixedly connected to the end of the input shaft 13, and the input flange 1 is connected to the disc 8 via a positioning shaft head 12. The positioning... An elastic plate 14 is provided on the shaft head 12, and the disc 8 is connected to the elastic plate 14; the sealing assembly includes a skeleton oil seal 2 disposed between the front housing 4 and the input flange 1, and a smaller skeleton oil seal 2 is used to reduce the relative linear velocity at the sealing lip of the skeleton oil seal 2; two skeleton oil seals 2 are provided, and a double oil seal structure is adopted to improve the service life of the skeleton oil seal 2. When the skeleton oil seal 2 leaks oil, it can be replaced without disassembling the hydraulic torque converter core 5, which is convenient for maintenance; a partition plate 7 is provided between the pump hub 6 and the gearbox 10.

[0019] Working process or principle:

[0020] In use, the skeleton oil seal 2 is installed in the front housing 4, and the sealing lip cooperates with the input flange 1 to achieve a sealing effect. When the skeleton oil seal 2 leaks oil, it is only necessary to disassemble the input flange 1 connected to the disc 8 and replace the skeleton seal. In contrast, traditional large-tonnage hydraulic torque converters place the oil seal between the pump hub 6 and the partition 7. When replacing the skeleton oil seal 2, the torque converter core 5 needs to be completely removed. This structure ensures normal operation and facilitates the replacement of the skeleton seal.

[0021] This invention addresses the problems of existing large-tonnage hydraulic torque converters by adding a partition 7 between the hydraulic torque converter core 5 and the engine. This allows for the use of a smaller skeleton oil seal 2, reducing the relative linear velocity at the sealing lip of the skeleton oil seal 2. Furthermore, the adoption of a double oil seal structure improves the lifespan of the skeleton oil seal 2. In the event of oil leakage from the skeleton oil seal 2, it can be replaced without disassembling the hydraulic torque converter core 5, thus facilitating maintenance.

[0022] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A front-shell enclosed large-tonnage hydraulic torque converter, characterized in that: It includes a front housing (4), a middle section (9) and a gearbox (10) connected in sequence to the front housing (4), a pump hub (6) connected to the middle section (9) via a turbine shaft (11), a torque converter core (5) connected to the pump hub (6), an input shaft (13) connected to the torque converter core (5), a disc (8) connected to the input shaft (13), and a bearing (3) and a sealing assembly provided between the input shaft (13) and the front housing (4).

2. The front-shell enclosed large-tonnage hydraulic torque converter according to claim 1, characterized in that: The input shaft (13) is fixedly connected to an input flange (1) at its end, and the input flange (1) is connected to the disc (8) through a positioning shaft head (12).

3. The front-shell enclosed large-tonnage hydraulic torque converter according to claim 2, characterized in that: The positioning shaft head (12) is provided with an elastic plate (14), and the disc (8) is connected to the elastic plate (14).

4. The front-shell enclosed large-tonnage hydraulic torque converter according to claim 3, characterized in that: The sealing assembly includes a skeleton oil seal (2) disposed between the front housing (4) and the input flange (1).

5. The front-shell enclosed large-tonnage hydraulic torque converter according to claim 4, characterized in that: The aforementioned skeleton oil seal (2) is provided in two parts.

6. The front-shell enclosed large-tonnage hydraulic torque converter according to claim 5, characterized in that: A partition (7) is provided between the pump hub (6) and the gearbox (10).

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