A centrifugal type closed hydraulic torque converter

Abstract

The present application relates to a hydraulic torque converter, in order to solve the existing lock oil circuit structure complex, low transmission efficiency of the whole vehicle and so on, and propose a centrifugal type locking hydraulic torque converter, including guide wheel housing and turbine housing connected with input shaft and output shaft respectively through bearing, the housing of both is provided with guide wheel, pump wheel and turbine coaxially sleeved on the outside of input shaft; locking device is further provided between the pump wheel and the turbine; the inlet end of the pump wheel is connected with the input shaft through the face teeth, and the outlet end of the turbine is connected with the output shaft through the face teeth; recess is opened on the turbine, the outlet end of the pump wheel is embeddedly installed in the recess on the turbine, and locking oil circuit communicated with the recess is further opened on the turbine; the locking device includes friction pair, piston and spline sleeve, the friction pair is connected with the pump wheel through the spline sleeve, one end of the piston is connected with the friction pair, the other end is installed in the recess on the turbine, and the locking oil circuit outlet communicated with the recess corresponds.

Description

Technical Field

[0001] This invention relates to hydraulic torque converters, and more specifically to a centrifugal lock-up hydraulic torque converter. Background Technology

[0002] In order to obtain greater output torque, existing large equipment usually uses hydraulic torque converters that can provide larger torque during operation. However, in non-operational conditions, the hydraulic torque converter does not need to provide additional torque. For hydraulic torque converters that can provide larger torque, there will be greater energy loss in non-operational conditions, which will affect the power transmission efficiency of the whole machine. Therefore, it is necessary to design a lock-up oil circuit in the hydraulic torque converter to reduce energy loss.

[0003] Traditional lock-up hydraulic circuits typically introduce oil into the torque converter housing through the gearbox input shaft. The lock-up hydraulic circuit structure on the input shaft is relatively complex, making it prone to damage between components during assembly and affecting its locking effect. Furthermore, the machining process for the oil holes on the input shaft in traditional lock-up hydraulic circuits is complex, resulting in poor sealing performance. During the locking process, continuous oil supply to the torque converter is required, leading to significant losses from continuous oil churning and a decrease in overall vehicle transmission efficiency. Therefore, a torque converter with a lock-up hydraulic circuit is needed to meet the requirements of high torque output and efficient power transmission for large equipment. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of complex structure, poor sealing performance, and low transmission efficiency of existing hydraulic torque converters' lock-up oil circuits, and to propose a centrifugal lock-up hydraulic torque converter.

[0005] To achieve the above objectives, the technical solution proposed by this invention is as follows:

[0006] A centrifugal lock-up hydraulic torque converter includes an input shaft and an output shaft coaxially connected. The input shaft is connected to an engine, and the output shaft is connected to a transmission. The converter is characterized by further including a guide wheel housing and a turbine housing connected to the input shaft and output shaft respectively via tapered roller bearings. The guide wheel housing and turbine housing are interconnected to form the outer casing of the hydraulic torque converter. The guide wheel housing is located on the input shaft side, and the turbine housing is located on the output shaft side. Inside the outer casing are a guide wheel and a pump wheel coaxially mounted from back to front on the outside of the input shaft, and a turbine coaxially mounted on the output shaft.

[0007] A locking device is also provided between the pump wheel and the turbine.

[0008] The guide wheel is fixedly connected to the guide wheel housing; the inlet end of the pump wheel is connected to the input shaft through end face teeth, and the outlet end of the turbine is connected to the output shaft through end face teeth.

[0009] The turbine is provided with a recess, the outlet end of the pump wheel is embeddedly installed in the recess on the turbine, and forms a cavity with the turbine for installing the locking device, and the turbine is also provided with a locking oil path communicated with the recess;

[0010] The locking device comprises a friction pair, a piston and a spline sleeve, the friction pair is connected with the pump wheel through the spline sleeve, one end of the piston is connected with the friction pair, the other end is installed in the recess on the turbine, and corresponds to the outlet of the locking oil path communicated with the recess, and the locking oil path on the turbine is used to push the piston to apply extrusion force to the friction pair after oil filling, so that the turbine and the pump wheel rotate at the same speed.

[0011] Further, the friction pair comprises n friction plates and n-1 separation plates, and the n friction plates and the n-1 separation plates are arranged in parallel in turn.

[0012] Further, inner and outer sealing rings are respectively arranged between the two sides of the piston and the connecting end faces of the recess on the turbine, for pressure maintaining of the locking device.

[0013] Further, an O-shaped sealing ring is arranged on the turbine near the locking oil path, for sealing the connecting face of the turbine and the turbine housing.

[0014] Further, conical roller bearings are arranged on the connecting ends between the input shaft and the output shaft, the guide wheel housing and the input shaft, and the turbine housing and the output shaft.

[0015] Further, the inlet end of the pump wheel and the outlet end of the turbine are connected through face teeth, and bolts are arranged at the connecting positions for fixed connection.

[0016] Further, a guide oil tongue is arranged at the outlet of the guide wheel, a guide oil tongue mounting groove is arranged on the guide wheel housing, the guide oil tongue is adaptively installed in the guide oil tongue mounting groove, for reducing the oil loss between the guide wheel and the pump wheel.

[0017] Further, a guide wheel end cover is arranged on the outside of the guide wheel housing, and a turbine end cover is arranged on the outside of the turbine housing.

[0018] A first skeleton oil seal is arranged on the inner side of the guide wheel end cover near the conical roller bearing;

[0019] A second skeleton oil seal is arranged on the inner side of the turbine end cover near the conical roller bearing.

[0020] Further, a comb-shaped seal is arranged on the connecting position between the guide wheel housing and the input shaft.

[0021] Further, an oil inlet ring groove is arranged on the position corresponding to the outlet of the locking oil path of the piston, and the oil inlet ring groove is arranged on the turbine and / or the piston.

[0022] Advantages of the present application:

[0023] The centrifugal closed hydraulic torque converter of the present application sets a closing device between the turbine and the pump wheel, effectively improves the transmission efficiency of the whole vehicle, has compact structure and is easy to process, can meet the demand of large torque output and high efficient power transmission of large equipment, and has strong practicality.

[0024] The present application sets a tapered roller bearing on the connecting end between the input shaft and the output shaft, the guide wheel shell and the input shaft, and the turbine shell and the output shaft, which can effectively improve the stability and reliability of the structure, and the oil liquid of the hydraulic torque converter can fill the space where the tapered roller bearing is located through normal circulation when the hydraulic working condition, the internal cavity is sealed by the comb-shaped seal, which can ensure that the oil liquid is not easily thrown out, and the tapered roller bearing can be effectively lubricated at all times; in the closed working condition, the oil supply to the cavity of the hydraulic torque converter can be cut off, the oil stirring loss is reduced, and the overall machine efficiency is improved.

[0025] The closing oil way in the hydraulic torque converter of the present application can be directly introduced into the turbine through the turbine shell, and the connection surface between the two is sealed by the O-shaped sealing ring, which effectively improves the sealing performance of the hydraulic torque converter.

[0026] The closing device of the present application is set between the turbine and the pump wheel, the turbine is fixed on the turbine shell, the structure is simple and easy to process, and the turbine shell is also easy to disassemble, which is convenient for detecting and repairing the internal components of the hydraulic torque converter.

[0027] The outer sealing ring and the inner sealing ring are arranged on the outer side of the piston, which can realize the pressure preservation of the closing device, and effectively improve the transmission efficiency of the hydraulic torque converter. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of an embodiment of the centrifugal closed hydraulic torque converter of the present application;

[0029] Figure 2 It is a partial enlarged view of the closing device in the embodiment of the present application;

[0030] Figure 3 It is a partial enlarged view of the comb-shaped seal in the embodiment of the present application;

[0031] REFERENCE NUMERALS:

[0032] 1-Input shaft, 2-First skeleton oil seal, 3-Guide wheel end cover, 4-Tap roller bearing, 5-Guide wheel housing, 6-Guide wheel, 7-Turbine housing, 8-Turbine, 9-Pump wheel, 10-Locking device, 11-Groove, 12-Locking oil passage, 13-Output shaft, 14-Friction pair, 15-Spline sleeve, 16-Piston, 17-Friction plate, 18-Separator plate, 19-Turbine end cover, 20-Inner sealing ring, 21-Outer sealing ring, 22-O-ring seal, 23-End face teeth, 24-Oil guide tongue, 25-Comb seal, 26-Second skeleton oil seal. Detailed Implementation

[0033] like Figure 1 As shown, a centrifugal lock-up hydraulic torque converter includes an input shaft 1 and an output shaft 13 coaxially connected. The input shaft 1 is connected to an engine, and the output shaft 13 is connected to a transmission. It also includes a guide wheel housing 5 and a turbine housing 7 connected to the input shaft 1 and output shaft 13 respectively via tapered roller bearings 4. The guide wheel housing 5 and turbine housing 7 are interconnected to form the outer casing of the hydraulic torque converter. The guide wheel housing 5 is located on one side of the input shaft 1, and the turbine housing 7 is located on one side of the output shaft 13. Inside the outer casing are a guide wheel 6 and a pump wheel 9 coaxially mounted from back to front on the outside of the input shaft 1, and a turbine 8 coaxially mounted on the output shaft 13. A locking device 10 is also provided between the pump wheel 9 and the turbine 8.

[0034] like Figure 3 As shown, a comb-shaped seal 25 is provided at the connection between the guide wheel housing 5 and the input shaft 1, and the guide wheel 6 is fixedly connected to the guide wheel housing 5; an oil guide tongue 24 is provided at the outlet of the guide wheel 6, and an oil guide tongue mounting groove is provided on the guide wheel housing 5. The oil guide tongue 24 is adapted to be installed in the oil guide tongue mounting groove to reduce oil loss between the guide wheel 6 and the pump wheel 9.

[0035] The inlet end of the pump wheel 9 is connected to the input shaft 1 via end face teeth 23 and bolts, and the outlet end of the turbine 8 is connected to the output shaft 13 via end face teeth 23 and bolts. Tapered roller bearings 4 are provided on the connection ends between the input shaft 1 and the output shaft 13, between the guide wheel housing 5 and the input shaft 1, and between the turbine housing 7 and the output shaft 13. A guide wheel end cover 3 is provided on the outer side of the guide wheel housing 5, and a turbine end cover 19 is provided on the outer side of the turbine housing 7. A first skeleton oil seal 2 is provided on the inner side of the guide wheel end cover 3 near the bearing 3. A second skeleton oil seal 26 is provided on the inner side of the turbine end cover 19 near the bearing 2.

[0036] In the centrifugal lock-up hydraulic torque converter, the oil can be filled with the space where the tapered roller bearing is located through normal circulation during hydraulic operation. Due to the presence of the comb seal 25, the oil in the centrifugal lock-up hydraulic torque converter will not be thrown out, and the tapered roller bearing can be effectively lubricated. In the lock-up operation, the oil supply to the hydraulic torque converter cavity can be cut off, reducing oil churning losses and improving the overall efficiency.

[0037] The turbine 8 has a groove 11, the outer side of the pump wheel 9 is embedded in the groove 11 on the turbine 8, and forms a cavity with the groove 11 for installing the locking device 10. The turbine 8 also has a locking oil passage 12 that communicates with the groove 11.

[0038] like Figure 2 As shown, the locking device 10 includes a friction pair 14, a piston 16, and a spline sleeve 15. The friction pair 14 includes three friction plates 17 and two separation plates 18 arranged in parallel and staggered order. The friction pair 14 is connected to the pump wheel 9 through the spline sleeve 15. One end of the piston 16 is connected to the friction pair 14, and the other end is installed in a groove 11 on the turbine 8, corresponding to the outlet of the locking oil passage 12 that communicates with the groove 11. The locking oil passage 12 on the turbine 8 is used to push the piston 16 to apply a compressive force to the friction pair 14 after oil filling, so that the turbine and the pump wheel rotate at the same speed. An oil inlet ring groove is provided at the position of the piston 16 corresponding to the outlet of the locking oil passage 12. The oil inlet ring groove is provided in the turbine 8 and / or the piston 16.

[0039] An inner sealing ring 20 and an outer sealing ring 21 are respectively provided between the two sides of the piston 16 and the connecting end face of the groove 11 on the turbine 8, which are used to maintain pressure on the locking device 10. An O-ring 22 is provided on the turbine 8 near the locking oil passage 12, which is used to seal the connecting surface between the turbine 8 and the turbine housing 7.

[0040] When the centrifugal lock-up hydraulic torque converter is in hydraulic operation, the lock-up oil circuit 12 is not filled with oil, and the lock-up device 10 runs idle. When in lock-up operation, the whole machine fills the lock-up oil circuit 12 with oil, the piston 16 moves towards the friction pair 14, and all the friction plates 17 and the separation plates 18 in the friction pair 14 are engaged. At this time, the turbine and the pump wheel rotate at the same speed, and the transmission efficiency is 1.

Claims

1. A centrifugal locking torque converter comprising an input shaft (1) and an output shaft (13) connected coaxially, the input shaft (1) being connected to an engine and the output shaft (13) being connected to a transmission, characterized in that: Further comprising a guide wheel housing (5) and a turbine housing (7) connected with the input shaft (1) and the output shaft (13) respectively through the tapered roller bearings (4), the guide wheel housing (5) and the turbine housing (7) are connected with each other to form a housing of the hydraulic torque converter, wherein the guide wheel housing (5) is arranged on the side of the input shaft (1), and the turbine housing (7) is arranged on the side of the output shaft (13); the housing is provided with the guide wheel (6) coaxially sleeved on the outside of the input shaft (1) from back to front, the pump wheel (9), and the turbine (8) coaxially sleeved on the output shaft (13); The pump wheel (9) and the turbine (8) are further provided with a locking device (10); The guide wheel (6) is fixedly connected to the guide wheel housing (5); the inlet end of the pump wheel (9) is connected to the input shaft (1) through the end face teeth (23), and the outlet end of the turbine (8) is connected to the output shaft (13) through the end face teeth (23); The turbine (8) is provided with a groove (11), the outlet end of the pump wheel (9) is embeddedly installed in the groove (11) on the turbine (8), and forms a cavity with the turbine (8) for installing the locking device (10), and the turbine (8) is further provided with a locking oil way (12) communicated with the groove (11); The locking device (10) comprises a friction pair (14), a piston (16) and a spline sleeve (15), the friction pair (14) is connected to the pump wheel (9) through the spline sleeve (15), one end of the piston (16) is connected to the friction pair (14), the other end is installed in the groove (11) on the turbine (8), and corresponds to the outlet of the locking oil way (12) communicated with the groove (11), and the locking oil way (12) on the turbine (8) is used to push the piston (16) to apply extrusion force to the friction pair (14) after oil filling, so that the turbine (8) and the pump wheel (9) rotate at the same speed.

2. The centrifugal locking hydraulic torque converter according to claim 1, wherein: The friction pair (14) comprises n friction plates (17) and n-1 separation plates (18), and the n friction plates (17) and the n-1 separation plates (18) are arranged in parallel in turn.

3. The centrifugal locking hydraulic torque converter according to claim 2, wherein: The two sides of the piston (16) and the connecting end surfaces of the groove (11) on the turbine (8) are respectively provided with an inner sealing ring (20) and an outer sealing ring (21) for pressure maintaining of the locking device (10).

4. The centrifugal locking hydraulic torque converter according to claim 3, wherein: An O-shaped sealing ring (22) is arranged on the turbine (8) near the locking oil way (12) for sealing the connecting surface of the turbine (8) and the turbine housing (7).

5. The centrifugal locking hydraulic torque converter according to claim 4, wherein: The tapered roller bearings (4) are arranged on the connecting ends between the input shaft (1) and the output shaft (13), the guide wheel housing (5) and the input shaft (1), and the turbine housing (7) and the output shaft (13).

6. The centrifugal locking hydraulic torque converter according to claim 5, wherein: The inlet end of the pump wheel (9) and the outlet end of the turbine (8) are connected by end face teeth (23), and bolts are arranged at the connection positions for fixed connection.

7. The centrifugal closed hydraulic torque converter according to claim 6, characterized in that: An oil guide tongue (24) is arranged at the outlet of the guide wheel (6), an oil guide tongue mounting groove is arranged on the guide wheel housing (5), the oil guide tongue (24) is adapted to be mounted in the oil guide tongue mounting groove, and the oil guide tongue (24) is used to reduce the oil loss between the guide wheel (6) and the pump wheel (9).

8. The centrifugal closed hydraulic torque converter according to claim 7, characterized in that: A guide wheel end cover (3) is arranged on the outside of the guide wheel housing (5), and a turbine end cover (19) is arranged on the outside of the turbine housing (7); A first skeleton oil seal (2) is arranged on the inner side of the guide wheel end cover (3) and close to the tapered roller bearing (4); A second skeleton oil seal (26) is arranged on the inner side of the turbine end cover (19) and close to the tapered roller bearing (4).

9. The centrifugal closed hydraulic torque converter according to claim 8, characterized in that: A comb-shaped seal (25) is arranged at the connection position between the guide wheel housing (5) and the input shaft (1).

10. The centrifugal closed hydraulic torque converter according to claim 1, characterized in that: An oil inlet ring groove is arranged at the position corresponding to the outlet of the closed oil passage (12) of the piston (16), and the oil inlet ring groove is arranged on the turbine (8) or / and the piston (16).

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