Large-torque torque-increasing torque converter

Abstract

The invention discloses a large-torque torque-increasing torque converter, and belongs to the field of gearboxes. In the invention, the pump wheel is a power input element and drives the turbine to rotate; the pump wheel is provided with an opening and forms an inner cavity with an opening, and the turbine is provided with an opening and forms a second inner cavity with an opening. An opening of the turbine faces the pump wheel and is installed in an inner cavity of the pump wheel. The guide wheel is mounted between the pump wheel and the turbine and is coaxial with the pump wheel and the turbine; pump impeller blades are arranged in the pump impeller, turbine blades are arranged in the turbine, the guide wheel is provided with an oil channel for oil liquid to penetrate through, and guide wheel blades are arranged in the oil channel. The pump impeller blades, the turbine blades and the guide wheel blades are arranged in a matched mode. According to the large-torque torque-increasing torque converter, the blade contour is optimized, the casting progress is accelerated, the transmission efficiency is improved, and therefore the effects of saving oil and protecting the environment are achieved.

Description

Technical Field

[0001] The invention relates to a large torque increasing torque converter, belonging to the field of gearboxes. Background Art

[0002] An automatic transmission is a transmission device that can automatically shift gears according to the vehicle speed and engine speed, as opposed to a manual transmission. There are four common types of automatic transmissions: hydraulic automatic transmission (AT), mechanical continuously variable transmission (CVT), electronically controlled mechanical automatic transmission (AMT) and dual-clutch automatic transmission.

[0003] Among them, hydraulic automatic transmission (AT) is widely used due to its high durability and ability to transmit large torque. The torque converter is an indispensable component in the hydraulic automatic transmission (AT). It plays the role of connecting and cutting off the engine power in the transmission. However, due to its characteristic of converting hydraulic force into power, its efficiency is not high and the air loss is large. In addition, the torque converter on small passenger cars is mostly a stamped and welded structure because small cars have small torque. However, on heavy commercial vehicles, the existing torque converter structure can no longer meet the use requirements. Summary of the invention

[0004] The invention provides a large torque increasing torque converter, which optimizes the blade profile, improves the casting progress, and improves the transmission efficiency, thereby playing the role of saving oil and protecting the environment.

[0005] The technical solution adopted by the present invention is a large torque increasing torque converter, comprising a pump wheel and a turbine; the pump wheel is a power input component and drives the turbine to rotate;

[0006] It also includes a guide wheel; the pump wheel has an opening and forms an internal cavity with an opening, and the turbine has an opening and forms an internal cavity with an opening; the opening of the turbine faces the pump wheel and is installed in the internal cavity of the pump wheel; the guide wheel is installed between the pump wheel and the turbine and is coaxial with the pump wheel and the turbine;

[0007] The pump wheel has pump blades inside, the turbine has turbine blades inside, the guide wheel has an oil passage for oil to pass through and guide wheel blades are arranged in the oil passage; the pump blades, turbine blades and guide wheel blades are arranged in coordination.

[0008] Optimized, the above-mentioned large torque increasing torque converter, the pump wheel, the turbine wheel and the guide wheel are formed by low-pressure casting of ZL101A aluminum alloy and then subjected to T6 heat treatment.

[0009] Optimally, the large torque increasing torque converter further comprises a torque converter support sleeve; the torque converter support sleeve is a tubular sleeve body, and the pump wheel is connected to the torque converter support sleeve through a bearing sleeve and rotates on the torque converter support sleeve.

[0010] Optimally, the above-mentioned large torque increasing torque converter also includes a turbine shaft, which passes through the pump wheel and the guide wheel and is connected to the turbine transmission.

[0011] Optimally, the large torque increasing torque converter further comprises a turbine hub gear, wherein the turbine hub gear is attached to and fixed on an end surface of the turbine away from the pump wheel; the turbine hub gear is key-connected to the turbine shaft.

[0012] Optimally, the above-mentioned large torque increasing torque converter further includes a free wheel roller; the free wheel roller is a one-way deep groove ball bearing, and the guide wheel rotates unidirectionally on the torque converter support sleeve through the free wheel roller.

[0013] Optimally, in the above-mentioned large torque increasing torque converter, the sum of the angles between the impeller blades and the axial section of the impeller shaft, and the angles between the turbine blades and the axial section of the turbine shaft is 5°.

[0014] The advantages of this application are:

[0015] In the technical solution of the present application, the pump wheel, turbine and guide wheel are formed by low-pressure casting of ZL101A aluminum alloy and are heat treated to ensure the accuracy of the parts. When they are applied to heavy-loaded vehicles such as heavy mining equipment, they can ensure good mechanical properties and durability while transmitting large torque.

[0016] In the technical solution of this application, by redesigning the blades of the pump wheel, turbine, and guide wheel, in order to meet the large torque transmission requirements of heavy-duty vehicles such as heavy mining equipment, it is designed to add a guide wheel between the turbine and the pump wheel. We set the relative angle of the turbine and pump wheel blades to 5°, so that the guide wheel can fully play the role of increasing torque, increasing the torque by 20%. At the same time, the 5° blade angle can ensure that the blade has sufficient strength and the stability of the transmitted torque. It can better transmit the large torque of heavy-duty vehicles and reduce its hydraulic loss, ensuring better transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 This is a schematic diagram of the decomposition of this application;

[0019] Figure 3 This is a schematic diagram of the structure of the pump wheel of this application;

[0020] Figure 4 for Figure 3 AA section view. DETAILED DESCRIPTION

[0021] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] As shown in the figure, the present invention is a torque converter with large torque increase. The torque converter of the present application includes three main components, namely, a pump wheel 1, a turbine 2, and a guide wheel 3. The pump wheel 1 has an opening and forms an internal cavity with an opening. The turbine 2 has an opening and forms an internal cavity 2 with an opening. The opening of the turbine 2 faces the pump wheel 1 and is installed in the internal cavity of the pump wheel 1. The guide wheel 3 is installed between the pump wheel 1 and the turbine 2 and is coaxial with the pump wheel 1 and the turbine 2. The pump wheel 1 has a pump wheel blade 101, the turbine 2 has a turbine blade 201, and the guide wheel 3 has an oil passage for oil to pass through and a guide wheel blade 301 is provided in the oil passage. The pump wheel blade 101, the turbine blade 201 and the guide wheel blade 301 are arranged in coordination.

[0023] The pump wheel 1 is a power input element driven by the engine. The turbine 2 is mounted on the turbine shaft 5 with a spline. The guide wheel 3 is a flow guide element, and its main function is to increase the torque. The guide wheel 3 is supported on the free wheel roller 7, and the free wheel roller 7 is mounted on the torque converter support sleeve 4 with a spline. This structure of the guide wheel 3 forms an overrunning clutch, allowing the guide wheel 3 to rotate freely in one direction and lock in the opposite direction.

[0024] The pump wheel 1, turbine wheel 2 and guide wheel 3 are made of ZL101A aluminum alloy low-pressure casting and formed after T6 heat treatment. This method can ensure the accuracy of parts, and when they are used in heavy-duty vehicles such as heavy mining equipment, they can ensure good mechanical properties and durability while transmitting large torque.

[0025] The torque converter support sleeve 4 of this embodiment is a tubular sleeve body, and the pump wheel 1 is sleeved on the torque converter support sleeve 4 through a bearing and rotates on the torque converter support sleeve 4. The turbine shaft 5 passes through the pump wheel 1 and the guide wheel 3 and is connected to the turbine 2. The turbine gear hub 6 is attached to the end surface of the turbine 2 away from the pump wheel 1 and fixed, and the turbine gear hub 6 is key-connected with the turbine shaft 5.

[0026] The free wheel roller 7 is a one-way deep groove ball bearing, and the guide wheel 3 rotates one-way on the torque converter support sleeve 4 through the free wheel roller 7.

[0027] In the working state, the torque converter assembly is always filled with oil, and the oil flows through the torque converter to cool and lubricate it. When the torque converter is driven by the engine, the blades of the pump wheel 1 throw the oil to the blades of the turbine 2, and the impact of the oil on the blades of the turbine 2 causes the turbine 2 to rotate.

[0028] The turbine 2, which is splined on the turbine shaft 5, transmits the torque to the gearbox gear. When the engine is idling, the oil has little impact on the blades of the turbine 2. When the engine is running at high speed, the impact of the oil is much greater than when idling, so the torque generated by the turbine 2 is also large.

[0029] The oil thrown into the turbine 2 flows to the blades of the guide wheel 3. When the guide wheel 3 is locked and does not rotate, the blades of the guide wheel 3 change the direction of the oil flow and guide the oil into the pump wheel 1. The direction in which the oil flows into the pump wheel 1 promotes the rotation of the pump wheel 1. It is this function of changing the direction of the oil flow that enables the torque converter to increase the input torque.

[0030] In response to the large torque transmission requirements of heavy-duty vehicles such as heavy mining equipment, it is designed to add a guide wheel between the turbine and the pump wheel. The relative angle of the turbine and pump wheel blades is set to 5°, so that the guide wheel can fully play the role of increasing torque and increase the torque by 20%. At the same time, the 5° blade angle can ensure that the blade has sufficient strength and the stability of the transmitted torque.

[0031] When the turbine 2 is in a stalled state and the pump impeller 1 rotates at a high speed, the torque increase is large. When the turbine 2 rotates and the speed gradually increases, the torque increase effect of the torque converter gradually decreases.

[0032] When the speed of turbine 2 approaches that of pump wheel 1, the oil flow to guide wheel 3 begins to impact the back of the blades of guide wheel 3, which makes guide wheel 3 rotate in the same direction as turbine 2 and pump wheel 1. At this time, the torque-increasing effect of the torque converter disappears, and it actually becomes a hydraulic coupling.

[0033] Therefore, the torque converter has three functions: first, it can act as a clutch because it cannot transmit torque when the engine is idling; second, it can increase the torque when the speed of turbine 2 is low and the speed of pump wheel 1 is high, output a larger starting force or output a larger driving force when necessary; third, in the traction operating area, it acts like a hydraulic coupling, which can effectively transmit the engine torque to the transmission gear.

[0034] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A high torque torque converter, comprising a pump wheel (1) and a turbine wheel (2); the pump wheel (1) is a power input component and drives the turbine wheel (2) to rotate; the characteristics are: It also includes a guide wheel (3); the pump wheel (1) has an opening and forms an internal cavity with an opening, and the turbine (2) has an opening and forms an internal cavity with an opening; the opening of the turbine (2) faces the pump wheel (1) and is installed in the internal cavity of the pump wheel (1); the guide wheel (3) is installed between the pump wheel (1) and the turbine (2) and is coaxial with the pump wheel (1) and the turbine (2); The pump wheel (1) has a pump wheel blade (101), the turbine (2) has a turbine blade (201), the guide wheel (3) has an oil passage for oil to pass through, and a guide wheel blade (301) is arranged in the oil passage; the pump wheel blade (101), the turbine blade (201) and the guide wheel blade (301) are arranged in coordination.

2. The high torque increasing torque converter according to claim 1, characterized in that: The pump wheel (1), turbine wheel (2) and guide wheel (3) are formed by low-pressure casting of ZL101A aluminum alloy and undergoing T6 heat treatment.

3. The high torque increasing torque converter according to claim 1, characterized in that: It also includes a torque converter support sleeve (4); the torque converter support sleeve (4) is a tubular sleeve body, and the pump wheel (1) is connected to the torque converter support sleeve (4) through a bearing sleeve and rotates on the torque converter support sleeve (4).

4. The high torque increasing torque converter according to claim 1, characterized in that: It also includes a turbine shaft (5), which passes through the pump wheel (1) and the guide wheel (3) and is connected to the turbine (2) through transmission.

5. The high torque increasing torque converter according to claim 4, characterized in that: It also comprises a turbine gear hub (6), which is attached to and fixed on the end surface of the turbine (2) away from the pump wheel (1); the turbine gear hub (6) is key-connected to the turbine shaft (5).

6. The high torque increasing torque converter according to claim 2, characterized in that: It also includes a free wheel roller (7); the free wheel roller (7) is a one-way deep groove ball bearing, and the guide wheel (3) rotates in one direction on the torque converter support sleeve (4) through the free wheel roller (7).

7. The high torque increasing torque converter according to claim 1, characterized in that: The sum of the angles between the pump impeller blades (101) and the axial cross-section of the pump impeller (1) rotating shaft and the angles between the turbine blades (201) and the axial cross-section of the turbine (2) rotating shaft is 5°.

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