Centrifugal locking hydraulic torque converter

Abstract

The invention relates to a hydraulic torque converter, and provides a centrifugal locking hydraulic torque converter in order to solve the problems that an existing locking oil way is complex in structure, low in whole vehicle transmission efficiency and the like, and the centrifugal locking hydraulic torque converter comprises a guide wheel shell and a turbine shell which are connected with an input shaft and an output shaft through bearings respectively. A guide wheel and a pump wheel which are coaxially sleeved on the outer side of the input shaft, and a turbine which is coaxially sleeved on the output shaft are arranged in the shells of the two; a locking device is further arranged between the pump wheel and the turbine. The inlet end of the pump wheel is connected with the input shaft through end face teeth, and the outlet end of the turbine is connected with the output shaft through end face teeth. A groove is formed in the turbine, the outlet end of the pump wheel is installed in the groove in the turbine in an embedded mode, and a locking oil way communicated with the groove is further formed in the turbine. 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, and the other end of the piston is installed in a groove in the turbine and corresponds to a locking oil way outlet communicated with the groove.

Description

Technical Field

[0001] The invention relates to a hydraulic torque converter, in particular to a centrifugal locking hydraulic torque converter. Background Art

[0002] In order to obtain a larger output torque when existing large-scale equipment is in operating conditions, a hydraulic torque converter that can provide a larger torque is usually used. However, in non-operating conditions, the hydraulic torque converter is not required to provide additional torque. For a hydraulic torque converter that can provide a larger torque, a large energy loss will be generated in non-operating conditions, affecting the power transmission efficiency of the entire machine. Therefore, it is necessary to design a locking oil circuit in the hydraulic torque converter to reduce energy loss.

[0003] The traditional locking oil circuit is usually introduced into the torque converter cover wheel through the gearbox input shaft. The locking oil circuit structure on the input shaft is relatively complex, which can easily cause damage between components during assembly, affecting its locking effect. At the same time, the oil hole processing technology on the input shaft in the traditional locking oil circuit is relatively complex, and the sealing performance of the oil circuit is poor. During the locking process, the torque converter needs to be continuously supplied with oil, resulting in large continuous oil stirring losses and a decrease in the transmission efficiency of the entire vehicle. Therefore, it is necessary to design a torque converter with a locking oil circuit to meet the needs of large torque output and efficient power transmission required by large equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of the complex structure of the locking oil circuit of the existing hydraulic torque converter, poor sealing performance, and low vehicle transmission efficiency, and to propose a centrifugal locking hydraulic torque converter.

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

[0006] A centrifugal locking hydraulic torque converter comprises an input shaft and an output shaft connected coaxially, wherein the input shaft is connected to an engine, and the output shaft is connected to a transmission, and the special feature of the centrifugal locking hydraulic torque converter is that it also comprises a guide wheel housing and a turbine housing connected to the input shaft and the output shaft respectively through tapered roller bearings, the guide wheel housing and the turbine housing are connected to each other to form a housing of the hydraulic torque converter, wherein the guide wheel housing is arranged on one side of the input shaft, and the turbine housing is arranged on one side of the output shaft; wherein a guide wheel and a pump wheel coaxially sleeved on the outside of the input shaft from back to front, and a turbine coaxially sleeved on the output shaft are arranged in the housing;

[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 the end face gear, and the outlet end of the turbine is connected to the output shaft through the end face gear;

[0009] The turbine is provided with a groove, the outlet end of the pump wheel is embedded in the groove of the turbine, and forms a cavity for installing a locking device with the turbine, and a locking oil passage communicating with the groove is also provided on the turbine;

[0010] The locking device includes a friction pair, a piston and a spline sleeve. The friction pair is connected to the pump wheel through the spline sleeve. One end of the piston is connected to the friction pair, and the other end is installed in a groove on the turbine and corresponds to the locking oil circuit outlet connected to the groove. The locking oil circuit 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] Furthermore, the friction pair comprises n friction plates and n-1 separation plates, and the n friction plates and n-1 separation plates are arranged alternately and in parallel in sequence.

[0012] Furthermore, an inner sealing ring and an outer sealing ring are respectively arranged between the connecting end surfaces of the groove on both sides of the piston and the turbine, so as to maintain the pressure of the locking device.

[0013] Furthermore, an O-ring is provided on the turbine at a position close to the locking oil passage, for sealing the connection surface between the turbine and the turbine housing.

[0014] Furthermore, tapered roller bearings are provided 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] Furthermore, the inlet end of the pump wheel and the input shaft, and the outlet end of the turbine and the output shaft are connected via face teeth, and bolts are provided at the connection points between the two for fixed connection.

[0016] Furthermore, an oil guide tongue is provided at the outlet of the guide wheel, and an oil guide tongue mounting groove is provided on the guide wheel housing. The oil guide tongue is adapted to be installed in the oil guide tongue mounting groove to reduce the oil loss between the guide wheel and the pump wheel.

[0017] Furthermore, a guide wheel end cover is provided on the outer side of the guide wheel housing, and a turbine end cover is provided on the outer side of the turbine housing;

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

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

[0020] Furthermore, a comb seal is provided at the connection between the guide wheel housing and the input shaft.

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

[0022] Beneficial effects of the present invention:

[0023] [1] The present invention discloses a centrifugal locking hydraulic torque converter, in which a locking device is arranged between the turbine and the pump wheel, which effectively improves the transmission efficiency of the whole vehicle. The structure is compact and easy to process, and can meet the requirements of large torque output and efficient power transmission required by large equipment, and has strong practicality.

[0024] [2] The present invention arranges tapered roller bearings 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, which can effectively improve the stability and reliability of the structure. When the torque converter is in hydraulic working condition, the oil can fill the space where the tapered roller bearing is located through normal circulation. The internal cavity is sealed by a comb seal to ensure that the oil is not easily thrown out, and the tapered roller bearing can always be effectively lubricated. In the locked working condition, the oil supply to the torque converter cavity can be cut off to reduce oil stirring loss and improve the efficiency of the whole machine.

[0025] [3] The locking oil circuit in the torque converter of the present invention can be directly introduced into the turbine through the turbine housing, and an O-ring is used to seal the connection surface between the two, thereby effectively improving the sealing performance of the torque converter.

[0026] [4] The present invention arranges the locking device between the turbine and the pump wheel, and the turbine is fixed on the turbine housing. The structure is simple and easy to process. The turbine housing is also easy to disassemble, which facilitates the inspection and maintenance of the internal components of the torque converter.

[0027] [5] The present invention provides an outer sealing ring and an inner sealing ring on the outer side of the piston, which can maintain the pressure of the locking device and effectively improve the transmission efficiency of the torque converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of a centrifugal locking hydraulic torque converter of the present invention;

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

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

[0031] Reference numerals:

[0032] 1-input shaft, 2-first skeleton oil seal, 3-guide wheel end cover, 4-tapered 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 circuit, 13-output shaft, 14-friction pair, 15-spline sleeve, 16-piston, 17-friction plate, 18-separation plate, 19-turbine end cover, 20-inner sealing ring, 21-outer sealing ring, 22-O-ring, 23-end face tooth, 24-oil guide tongue, 25-comb seal, 26-second skeleton oil seal. DETAILED DESCRIPTION

[0033] like Figure 1 As shown, a centrifugal locking hydraulic torque converter comprises an input shaft 1 and an output shaft 13 which are coaxially connected, wherein the input shaft 1 is connected to an engine, and the output shaft 13 is connected to a transmission, and further comprises a guide wheel housing 5 and a turbine housing 7 which are respectively connected to the input shaft 1 and the output shaft 13 through a tapered roller bearing 4, wherein the guide wheel housing 5 and the turbine housing 7 are mutually connected to form a housing of the hydraulic torque converter, wherein the guide wheel housing 5 is arranged on one side of the input shaft 1, and the turbine housing 7 is arranged on one side of the output shaft 13, and a guide wheel 6 and a pump wheel 9 which are coaxially sleeved on the outer side of the input shaft 1 from back to front, and a turbine wheel 8 which is coaxially sleeved on the output shaft 13 are arranged in the housing; a locking device 10 is also arranged between the pump wheel 9 and the turbine wheel 8;

[0034] like Figure 3 As shown, a comb 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, so as to reduce the 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 through the end face teeth 23 and bolts, and the outlet end of the turbine 8 is connected to the output shaft 13 through the end face teeth 23 and bolts; tapered roller bearings 4 are provided 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; 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 hydraulic working condition, the oil of the centrifugal locking torque converter can fill the space where the tapered roller bearing is located through normal circulation. Due to the presence of the comb seal 25, the oil in the centrifugal locking torque converter will not be thrown out, and the tapered roller bearing can always be effectively lubricated. In the locking working condition, the oil supply to the torque converter cavity can be cut off, reducing the oil churning loss and improving the efficiency of the whole machine.

[0037] The turbine 8 is provided with 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 for installing the locking device 10 with the groove 11. The turbine 8 is also provided with a locking oil passage 12 connected 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 which are arranged in parallel and staggered in sequence; 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 the groove 11 on the turbine 8, and corresponds to the outlet of the locking oil circuit 12 connected to the groove 11. The locking oil circuit 12 on the turbine 8 is used to push the piston 16 to apply an extrusion 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 circuit 12, and the oil inlet ring groove is provided on the turbine 8 or / and the piston 16.

[0039] An inner sealing ring 20 and an outer sealing ring 21 are respectively arranged between the connecting end surfaces of the groove 11 on the turbine 8 on both sides of the piston 16 for maintaining the pressure of the locking device 10. An O-ring 22 is arranged on the turbine 8 near the locking oil circuit 12 for sealing the connecting surface between the turbine 8 and the turbine housing 7.

[0040] When the centrifugal locking torque converter is in the hydraulic working condition, the locking oil circuit 12 is not filled with oil and the locking device 10 is idling; when it is in the locking working condition, the entire machine fills oil into the locking oil circuit 12, the piston 16 moves toward the direction close to the friction pair 14, and all the friction plates 17 and separation plates 18 in the friction pair 14 are combined. 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 hydraulic torque converter, comprising an input shaft (1) and an output shaft (13) connected coaxially, wherein the input shaft (1) is connected to an engine, and the output shaft (13) is connected to a transmission, characterized in that: The invention also comprises a guide wheel housing (5) and a turbine housing (7) respectively connected to the input shaft (1) and the output shaft (13) through a tapered roller bearing (4); the guide wheel housing (5) and the turbine housing (7) are connected to each other to form a housing of the hydraulic torque converter, wherein the guide wheel housing (5) is arranged on one side of the input shaft (1), and the turbine housing (7) is arranged on one side of the output shaft (13); the housing comprises a guide wheel (6) and a pump wheel (9) coaxially sleeved on the outside of the input shaft (1) from back to front, and a turbine (8) coaxially sleeved on the output shaft (13); A locking device (10) is also provided between the pump wheel (9) and the turbine wheel (8); 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 gear (23), and the outlet end of the turbine (8) is connected to the output shaft (13) through the end face gear (23); The turbine (8) is provided with a groove (11), the outlet end of the pump wheel (9) is embedded in the groove (11) on the turbine (8), and forms a cavity for installing a locking device (10) with the turbine (8), and the turbine (8) is also provided with a locking oil passage (12) communicating 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) via 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) and corresponds to an outlet of a locking oil circuit (12) connected to the groove (11); the locking oil circuit (12) on the turbine (8) is used to push the piston (16) to apply a squeezing 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. According to claim 1, a centrifugal locking hydraulic torque converter is characterized in that: 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 alternately and in parallel in sequence.

3. According to claim 2, a centrifugal locking hydraulic torque converter is characterized in that: An inner sealing ring (20) and an outer sealing ring (21) are respectively arranged between the connecting end surfaces of the two sides of the piston (16) and the groove (11) on the turbine (8) to maintain the pressure of the locking device (10).

4. A centrifugal locking torque converter according to claim 3, characterized in that: An O-type sealing ring (22) is provided on the turbine (8) at a position close to the locking oil passage (12) and is used to seal the connection surface between the turbine (8) and the turbine housing (7).

5. A centrifugal locking hydraulic torque converter according to claim 4, characterized in that: Tapered roller bearings (4) are provided on the connection 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. A centrifugal locking hydraulic torque converter according to claim 5, characterized in that: The inlet end of the pump wheel (9) and the input shaft (1), as well as the outlet end of the turbine (8) and the output shaft (13) are connected via end face teeth (23), and bolts are provided at the connection points between the two for fixed connection.

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

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

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

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

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