CN214331389U

CN214331389U - Hydraulic torque converter

Info

Publication number: CN214331389U
Application number: CN202022732106.4U
Authority: CN
Inventors: 章勇华; 鄢万斌; 蒋仁科; 王松林; 陈素姣
Original assignee: Liugong Liuzhou Driving Member Co ltd; Guangxi Liugong Machinery Co Ltd
Current assignee: Liugong Liuzhou Driving Member Co ltd; Guangxi Liugong Machinery Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-10-01
Anticipated expiration: 2030-11-24

Abstract

The utility model relates to a hydraulic torque converter, in order to solve the problem that the leakage oil in the existing torque converter shell may flow into the end of the engine shell cavity, the utility model constructs a hydraulic torque converter, which is provided with an annular boss protruding inwards on the shell, an oil baffle plate is fixedly arranged on the annular boss, the oil baffle plate is positioned between a gear wheel disc of a transfer gear and a pump wheel, and the center of the oil baffle plate is provided with an inner hole for the transfer gear rotating shaft to pass through; the outer edge of the oil baffle is connected with the annular boss in a sealing fit mode, and a first sealing ring is arranged between the inner hole of the oil baffle and the transfer gear rotating shaft. The utility model discloses in through setting up annular boss and installing the oil baffle on the boss, separate into two parts with the casing inner chamber, the gear wheel dish of transfer gear is located oil baffle right side space, prevents the fluid on oil baffle right side and enters into oil baffle left side, avoids draining in the torque converter to flow in engine housing, has still guaranteed the inside rotating part of torque converter simultaneously and has obtained sufficient lubrication.

Description

Hydraulic torque converter

Technical Field

The utility model relates to a hydraulic drive part, more specifically say, relate to a hydraulic torque converter.

Background

The five-ton loader transmission mainly adopts a double-turbine hydraulic torque converter and a planetary gearbox structure, the double-turbine hydraulic torque converter has large torque ratio and wide high-efficiency area, and is widely applied in China.

As shown in fig. 1, the twin-turbine torque converter mainly comprises a cover wheel 1, a turbine group 2, a housing 3, a pump wheel 5, a transfer gear 14, a guide wheel seat 10, a cast iron sealing ring 9 and a double bearing 11.

The left side of the shell 3 is fixedly connected with the shell of the engine through bolts, the right end of the guide wheel seat 10 is fixedly connected with the shell 3 through bolts, and the shell 3 and the guide wheel seat 10 are fixed and support parts.

The cover wheel 1 is connected with an engine flywheel through a group of elastic plates or elastic couplings, the right end of the cover wheel 1 is connected with the left end of the pump wheel 5 through bolts, the pump wheel 5 is connected with the transfer gear 14 through bolts, and the cover wheel 1, the pump wheel 5 and the transfer gear 14 are rotating parts and participate in power transmission. The turbine group 2 and the guide wheel 5 are installed in the space formed by the shroud wheel 1 and the pump wheel 5.

The pump wheel 5 and the transfer gear 14 are supported on the guide wheel seat 10 through the double bearings 11, the cast iron sealing ring 9 is arranged between the transfer gear 14 and the guide wheel seat 10, the cast iron sealing ring 9 is in rotary sealing and does not have the effect of sealing pressure oil, the internal oil pressure of the torque converter is above 0.5Mpa, the internal oil of the torque converter can leak through a gap between the guide wheel seat 10 and the cast iron sealing ring 9, and the leaked oil of the part plays a role in lubricating the transfer gear 14.

The bottom of the shell 3 is provided with an oil return groove 33 which is communicated with an oil tank of the gearbox, and oil leaked in the torque converter automatically flows back into the gearbox through the oil return groove.

The prior structure has the following defects:

1. metal surface sealing is adopted between the joint surfaces of the cover wheel 1 and the pump wheel 5 and between the joint surface of the pump wheel 5 and the transfer gear 14, so that additional leakage is easy to generate, the internal liquid filling of the torque converter is insufficient, and the performance of the torque converter is influenced.

2. When the loader works on a terrain with a large gradient, because of a certain inclination angle, the oil leaked from the inner cavity of the shell of the torque converter can possibly flow into the cavity of the shell of the engine, so that the oil of the gearbox is reduced, the lubricating oil of the engine is increased, and the performance of the torque converter, the reliability of a clutch of the gearbox and the reliability of the engine are influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that the leakage fluid in the current torque converter shell inner chamber can flow in the problem of engine case cavity tip, and provides a torque converter, avoids in the torque converter cavity leakage fluid flows in the engine case cavity.

The utility model discloses a realize that the technical scheme of its purpose is like: a hydraulic torque converter is constructed, and comprises a shell, a guide wheel seat, a pump wheel assembly and a cover wheel, wherein the right end of the guide wheel seat is fixedly connected with the shell, the pump wheel assembly is composed of a pump wheel and a transfer gear and is rotatably installed on the guide wheel seat through a double bearing, and the right end face of the cover wheel is fixedly connected with the left end face of the pump wheel.

The transfer gear is characterized in that an annular boss protruding inwards is arranged on the shell, an oil baffle plate is fixedly arranged on the annular boss and is positioned between a gear wheel disc of the transfer gear and a pump wheel, and an inner hole for a rotating shaft of the transfer gear to penetrate through is formed in the center of the oil baffle plate; the outer edge of the oil baffle is in sealing fit with the annular boss, and a first sealing ring is arranged between the inner hole of the oil baffle and the rotating shaft of the transfer gear. In a torque converter, the main oil leakage point is between the transfer gear and the guide wheel seat, and the oil lubricating the transfer gear is thrown out and splashed to the left side (the outer sides of the cover wheel and the pump wheel) in the shell due to the rotation of the transfer gear. The utility model discloses in, through setting up annular boss and installing the oil baffle on the boss, the oil baffle separates into two parts with the casing inner chamber, and the gear wheel dish of transfer gear is located oil baffle right side space, prevents the fluid on oil baffle right side and enters into oil baffle left side, avoids in the torque converter draining to flow into engine housing, has still guaranteed the inside rotating part of torque converter simultaneously and has obtained sufficient lubrication.

In the hydraulic torque converter, the inner hole of the annular boss is a circular positioning hole, the outer edge of the oil baffle plate is provided with a cylindrical surface matched with the inner hole of the annular boss and an annular mounting flange attached to the side surface of the annular boss, and the annular mounting flange is fixedly connected with the annular boss through a first bolt. Furthermore, a second sealing ring is arranged between the cylindrical surface of the outer edge of the oil baffle plate and the inner hole wall surface of the annular boss. The second sealing ring is arranged between the outer edge of the oil baffle plate and the annular boss, so that oil can be prevented from entering the space on the left side of the oil baffle plate through a gap between the oil baffle plate and the annular boss.

In the hydraulic torque converter, the inner hole of the oil baffle is a stepped hole, the large-diameter section of the oil baffle is close to the gear wheel disc of the transfer gear, and the first sealing ring is arranged at the large-diameter section of the inner hole of the oil baffle. Further, first sealing washer is the skeleton oil blanket, and its opening is towards the gear wheel direction be provided with the retaining ring that is used for blocking skeleton oil blanket open end on the pore wall of the major diameter section of oil baffle hole.

In the hydraulic torque converter, the left end of the rotating shaft of the transfer gear is fixedly connected with the pump wheel through the second bolt, the gear disc is connected to the right end of the rotating shaft through a spline, and the right end of the rotating shaft is provided with a check ring used for being in contact with the right end face of the gear disc. And a fourth sealing ring is arranged between the left end face of the rotating shaft and the pump wheel.

In the hydraulic torque converter, a cast iron sealing ring is arranged between the right section wall surface of the inner hole of the rotating shaft and the guide wheel seat.

In the hydraulic torque converter, a third sealing ring is arranged on the right end face, matched and connected with the left end face of the pump wheel, of the cover wheel.

In the hydraulic torque converter, the shell is provided with the oil return hole, the oil return hole is positioned on the wall of the shell on the right side of the bottom of the annular boss, and the oil return hole enables a cavity on the right side of the oil baffle plate in the shell to be communicated with the external space at the right end of the shell. The right end of the hydraulic torque converter shell is connected with a gearbox, and oil in a cavity on the right side of an oil baffle in the shell is guided into the gearbox through an oil return hole.

Compared with the prior art, the utility model discloses to the inside oil leakage point of torque converter done the totally enclosed design, accomplish to keep apart converter interior draining and engine housing, avoided converter interior draining to flow into engine housing, still guaranteed the inside rotating part of torque converter simultaneously and obtained sufficient lubrication.

Drawings

Fig. 1 is a schematic structural view of a conventional twin turbine torque converter.

Fig. 2 is a schematic structural diagram of the twin-turbine torque converter of the present invention.

Fig. 3 is a schematic diagram of a structure of a casing in the double-turbine torque converter of the present invention.

Fig. 4 is a partial enlarged view at I in fig. 2.

Fig. 5 is a partial enlarged view at II in fig. 2.

Fig. 6 is a partial enlarged view at III in fig. 2.

Part names and serial numbers in the figure:

the cover wheel 1, the turbine group 2, the casing 3, the annular boss 31, the inner hole 311, the threaded hole 312, the oil return hole 32, the first bolt 34, the third seal ring 4, the pump wheel 5, the second bolt 51, the second seal ring 6, the oil baffle plate 7, the annular mounting flange 71, the cylindrical surface 72, the fourth seal ring 8, the cast iron seal ring 9, the guide wheel seat 10, the double bearing 11, the retainer ring 13, the transfer gear 14, the gear disc 141, the rotating shaft 142, the retainer ring 15 and the first seal ring 16.

Detailed Description

The following description of the embodiments refers to the accompanying drawings.

As shown in fig. 2, the twin-turbine torque converter in the present embodiment includes a housing 3, and a shroud wheel 1, a turbine group 2, an impeller assembly, a stator 10, and the like mounted in the housing. Wherein the pump wheel assembly consists of a pump wheel 5 and a transfer gear 14 which are fixedly connected. The right end of the guide wheel seat 10 is fixedly connected with the box wall at the right end of the shell. The pump wheel assembly is rotatably mounted on the guide wheel base 10 through a double bearing 11. The right end of the cover wheel 1 is fixedly connected with the left end of the pump wheel 5. The turbine group 2 comprises a first-stage turbine and a second-stage turbine, is positioned in a space formed by the shroud wheel 1 and the pump wheel 5, and is respectively connected with an input first-stage gear (not shown in the figure) and an input second-stage gear (not shown in the figure). The right ends of the input first-stage gear and the input second-stage gear extend out of the right end of the shaft hole of the guide wheel seat and are used for being connected with an overrunning clutch of a gearbox (not shown) at the right end of the shell.

As shown in fig. 2, the housing 3 has an annular projection 31 projecting inward and surrounding it, and the annular projection 31 is substantially in the middle of the housing 3 in the axial direction. The annular boss 31 is fixedly provided with an oil baffle plate 7, the oil baffle plate 7 is positioned between the gear wheel disc 141 of the transfer gear and the pump wheel 5, and the center of the oil baffle plate 7 is provided with an inner hole for the rotating shaft 142 of the transfer gear to pass through; the outer edge of the oil baffle plate 7 is in sealing fit with the annular boss 31, and a first sealing ring 16 is arranged between the inner hole of the oil baffle plate 7 and the rotating shaft 142 of the transfer gear.

As shown in fig. 3, the inner hole 311 of the annular boss 31 is a circular positioning hole, and a plurality of threaded holes 312 are uniformly distributed on the side surface of the annular boss 31 around the center of the inner hole 311 in the circumferential direction. As shown in fig. 4, the oil deflector 7 is a circular plate having a cylindrical surface 72 and an annular mounting flange 71 at its outer edge. The cylindrical surface 72 is matched with the wall surface of the inner hole 311 of the annular boss 31, the annular mounting flange 71 is attached to the side surface of the annular boss 31, and the annular mounting flange 71 is fixedly connected with the annular boss 31 through the matching of the first bolt 34 and the threaded hole 312 on the annular boss 31. A sealing groove is arranged on the cylindrical surface 72 at the edge of the oil baffle plate 7, a second sealing ring 6 is arranged in the sealing groove, and the second sealing ring 6 is positioned between the cylindrical surface at the edge of the oil baffle plate 7 and the inner hole wall surface of the annular boss 31. The second sealing ring 6 between the edge of the oil baffle 7 and the annular boss 31 can effectively prevent oil on the right side of the oil baffle 7 from entering the space on the left side of the oil baffle 7 through the gap between the oil baffle 7 and the annular boss 31.

As shown in fig. 5, the transfer gear includes a gear disc 141 and a rotating shaft 142, the left end of the rotating shaft 142 is fixedly connected with the pump impeller 5 through a second bolt 51, the gear disc 141 is connected to the right end of the rotating shaft 142 through a spline, and a retainer ring 13 for contacting with the right end face of the gear disc 141 is arranged at the right end of the rotating shaft 142. A fourth sealing ring 8 is arranged between the left end surface of the rotating shaft 142 and the pump impeller 5. The fourth seal ring 8 between the left end surface of the rotating shaft 142 and the pump impeller 5 can effectively prevent oil in the pump impeller 5 from leaking to the outside of the pump impeller 5 through a gap between the pump impeller 5 and the rotating shaft 142. The left end face (the end face matched with the pump impeller 5) of the rotating shaft 142 is provided with a sealing ring groove, and the fourth sealing ring 8 is arranged in the groove.

As shown in FIG. 5, the inner bore of the oil baffle 7 is a stepped bore, and a large diameter section thereof is adjacent to the pinion disc 141 of the transfer gear, and the first seal ring 16 is disposed at the large diameter section of the inner bore of the oil baffle. The first sealing ring 16 is a skeleton oil seal, the opening of the first sealing ring faces the direction of the gear disc 141, and a retaining ring 15 used for retaining the opening end of the skeleton oil seal is arranged on the hole wall of the large-diameter section of the inner hole of the oil baffle plate 7. And a cast iron sealing ring 9 is arranged between the right section wall surface of the inner hole of the rotating shaft 142 and the guide wheel seat 10. The oil in the pump wheel 5 leaks to the gear wheel disc 141 of the transfer gear through the double bearing 11, the gap between the inner hole of the rotating shaft 142 and the guide wheel seat 10, and the cast iron seal ring 9, and lubricates the gear wheel disc 141 of the transfer gear.

As shown in fig. 2, the housing 3 is provided with an oil return hole 32, the oil return hole 32 is located on the housing wall on the right side of the bottom of the annular boss 31, and the oil return hole 32 communicates the chamber on the right side of the oil baffle 7 in the housing 3 with the space outside the right end wall of the housing 3. The right end of the double-turbine hydraulic torque converter shell 3 is connected with a gearbox, and oil in a cavity on the right side of an oil baffle 7 in the shell is guided into the gearbox through an oil return hole 32.

As shown in fig. 6, the right end face of the cover wheel 1 is connected with the left end face of the pump wheel 5 in a matching manner, and the right end face of the cover wheel 1 is provided with a third sealing ring 4. The third seal ring 4 is provided at this position, and oil in the pump wheel 5 and the shrouded wheel 1 can be prevented from leaking into the casing through the gap between the shrouded wheel 1 and the pump wheel 5. The right end face (the matching end face with the pump wheel) of the cover wheel 1 is provided with a sealing ring groove, and a third sealing ring 4 is arranged in the groove. Alternatively, a seal ring groove into which the third seal ring 4 is fitted may be provided on the left end surface of the pump wheel (the mating end surface with the shroud wheel).

In this embodiment, the left end of the shell 3 of the torque converter is connected with the shell of the engine, the right end of the shell 3 is connected with the gearbox, and the cover wheel 1 is connected with the engine flywheel through a group of elastic plates or elastic couplings. Because the third sealing ring 4 is arranged between the shrouding wheel 1 and the pump wheel 5 and the fourth sealing ring 8 is arranged between the pump wheel 5 and the left end surface of the rotating shaft 142, oil does not leak out from the pump wheel and the shrouding wheel at the two positions. The oil in the cover wheel 1 and the pump wheel 5 only leaks from the gap between the rotating shaft 142 and the guide wheel seat 10 (the cast iron sealing ring 9), but because the oil baffle plate 7 is arranged, the oil leaked to the gear wheel disc 141 of the transfer gear cannot enter the left space of the oil baffle plate 7, and only the gear wheel disc of the transfer gear can be lubricated on the right side of the oil baffle plate 7, and then flows to the right space of the right end box wall of the shell 3 through the oil return hole 32, namely enters the gearbox. Therefore, the double-turbine hydraulic torque converter in the embodiment has no oil leakage in the space on the left side of the oil baffle plate, and no oil enters the end of the engine shell when the loader works on a working surface with a large gradient, so that the reliability of a transmission part is greatly improved.

The torque converter in the above embodiment is a double-turbine torque converter, and the assembly connection relationship between the annular boss, the oil baffle plate, and the annular boss and the oil baffle plate, and the position relationship and the connection relationship between the oil baffle plate, the transfer gear, and the pump wheel in this embodiment can also be realized in a single-turbine torque converter. Set up annular boss in single turbine torque converter's casing, install the oil baffle in the hole of annular boss, the oil baffle hole is located between pump impeller and the transfer gear dish, and set up first sealing washer between oil baffle hole and the transfer gear's the pivot, set up the third sealing washer on the fitting surface is connected with the pump impeller to the cover wheel, set up the fourth sealing washer on the face of being connected of pump impeller and transfer gear's pivot, set up the oil gallery on the casing tank wall on annular boss bottom right side, with the cavity that is located the oil baffle right side in the casing 3 and the outside space intercommunication of casing right-hand member tank wall. Therefore, in the single-turbine torque converter, no oil leakage exists in the space on the left side of the oil baffle plate, and no oil enters the end of the engine shell.

Claims

1. A hydraulic torque converter comprises a shell (3), a guide wheel seat (10) with the right end fixedly connected with the shell, a pump wheel assembly consisting of a pump wheel (5) and a transfer gear (14) and rotatably installed on the guide wheel seat through a double bearing (11), and a cover wheel (1) with the right end face fixedly connected with the left end face of the pump wheel;

the transfer gear is characterized in that an annular boss (31) protruding inwards is arranged on the shell, an oil baffle plate (7) is fixedly arranged on the annular boss, the oil baffle plate is positioned between a gear wheel disc (141) of the transfer gear and a pump wheel (5), and an inner hole for a rotating shaft of the transfer gear to penetrate through is formed in the center of the oil baffle plate; the outer edge of the oil baffle is in sealing fit connection with the annular boss, and a first sealing ring (16) is arranged between the inner hole of the oil baffle and the rotating shaft of the transfer gear.

2. The torque converter of claim 1, wherein the inner hole of the annular boss is a circular positioning hole, the outer edge of the oil baffle plate has a cylindrical surface (72) matched with the inner hole of the annular boss and an annular mounting flange (71) attached to the side surface of the annular boss, and the annular mounting flange is fixedly connected with the annular boss through a first bolt (34).

3. Hydrodynamic torque converter according to claim 2, characterized in that a second sealing ring (6) is arranged between the cylindrical surface of the outer edge of the oil deflector and the inner bore wall surface of the annular projection.

4. A hydrodynamic torque converter according to any one of claims 1 to 3, characterized in that the inner bore of the oil deflector is a stepped bore, the large diameter section of which is adjacent to the toothed disc of the transfer gear, the first sealing ring (16) being arranged in the large diameter section of the inner bore of the oil deflector.

5. The torque converter according to claim 4, wherein the first seal ring (16) is a skeleton oil seal having an opening facing the direction of the gear wheel, and a retainer ring (15) for retaining the opening end of the skeleton oil seal is provided on a wall of the large-diameter portion of the inner bore of the oil retainer plate.

6. Hydrodynamic torque converter according to one of claims 1 to 3, characterized in that the left end of the rotational shaft (142) of the transfer gear is fixedly connected to the pump wheel (5) by means of a second bolt (51), the gear disc (141) is connected to the right end of the rotational shaft (142) by means of splines, and a stop ring is arranged at the right end of the rotational shaft for contact with the right end face of the gear disc.

7. The hydrodynamic torque converter according to claim 6, characterized in that a cast iron sealing ring (9) is arranged between the right wall surface of the inner bore of the rotating shaft (142) and the guide wheel seat (10).

8. Hydrodynamic torque converter according to one of claims 1 to 3, characterized in that a third sealing ring (4) is arranged on the right end face of the cover wheel (1) which is in a mating connection with the left end face of the pump wheel (5).

9. Hydrodynamic torque converter according to one of claims 1 to 3, characterized in that the housing is provided with oil return bores (32) in the housing wall on the right side of the bottom of the annular projection, which communicate the chamber in the housing on the right side of the oil baffle with the outer space at the right end of the housing.

10. Hydrodynamic torque converter according to claim 6, characterized in that a fourth sealing ring (8) is arranged between the left end face of the rotating shaft (142) and the pump impeller (5).