A hydrodynamic torque converter transmission system

Abstract

The application belongs to the technical field of torque converters, and aims to solve the technical problems of complex structure assembly of the existing hydraulic torque converter and the fact that the oil outlet width between the turbine and the guide wheel cannot be changed after the turbine is installed, and provides a hydraulic torque converter transmission system, wherein the input end cover, the cover wheel and the pump wheel module are fixedly connected, the cover wheel module further comprises a first supporting bearing, the first supporting bearing is installed between the cover wheel and the turbine hub, an annular groove is formed on the end face of the input end cover which is in abutment with the first supporting bearing, the annular groove penetrates the inner hole of the input end cover, a first axial gap is formed between the bottom of the annular groove and the first supporting bearing, a baffle is installed on the turbine hub, the baffle is located in the first axial gap and is used for axially constraining the turbine and the turbine hub. The assembly process of the torque converter assembly is simplified, and the working efficiency under the locking condition is improved.

Description

Technical Field

[0001] This application belongs to the field of torque converter technology and relates to a hydraulic torque converter transmission system. Background Technology

[0002] Construction machinery vehicles are characterized by complex operating conditions and variable loads. When encountering large drive loads, frequent load changes can easily cause significant fluctuations in engine speed or even stalling, which is detrimental to the operation of construction machinery vehicles. As a core component of the transmission system, the hydraulic torque converter enables smooth vehicle starts, smooth engine operation, and provides torque conversion and amplification functions. It is widely used in passenger vehicles, commercial vehicles, and construction machinery. Due to the special layout of the power transmission system in construction machinery, the hydraulic torque converter and transmission are generally not integrated together. Instead, the hydraulic torque converter is designed as a separate transmission system unit, integrating a hydraulic control module and a power take-off module.

[0003] In existing technologies, the turbine module is generally fixed to the turbine shaft. The axial positioning between the turbine module, pump wheel module, and guide wheel module significantly impacts the torque converter's performance. Due to the numerous dimensional chain elements from the turbine shaft to the torque converter pump wheel, precise positioning requires adjusting shims at the turbine shaft's front end, posing a challenge to the assembly process and increasing its complexity. Furthermore, once the turbine is installed, it is typically fixed to the turbine shaft and no longer undergoes axial movement; the width of the oil outlet between the turbine and the guide wheel becomes a fixed value and cannot be changed. Summary of the Invention

[0004] The purpose of this application is to solve the technical problems of complex assembly of existing hydraulic torque converters and the inability to change the width of the oil outlet between the turbine and the guide wheel after the turbine is installed, and to provide a hydraulic torque converter transmission system.

[0005] To achieve the above objectives, this application adopts the following technical solution: A hydraulic torque converter transmission system includes a torque converter module, a housing module, a hydraulic control unit module, a power take-off module, and a power transmission module; the torque converter module includes a cover wheel module, a pump wheel module, a turbine module, and a guide wheel module; the power transmission module includes a turbine shaft; the turbine module includes a turbine and a turbine hub, with the turbine mounted on the turbine shaft via the turbine hub; the cover wheel module includes a connected input end cover and a cover wheel; and also includes baffles; The input end cover, cover wheel, and pump wheel module are fixedly connected; The cover wheel module also includes a first support bearing, which is installed between the cover wheel and the turbine hub. An annular groove is provided on the end face of the input end cover that abuts the first support bearing. The annular groove passes through the inner hole of the input end cover, and a first axial gap is formed between the bottom of the annular groove and the first support bearing. The baffle is mounted on the turbine hub and is located within the first axial clearance, serving to axially constrain the turbine and the turbine hub.

[0006] Furthermore, the housing module includes a front housing module and a rear housing module; The front end of the front housing module is sleeved on the outside of the cover wheel and connected to the cover wheel, and the rear end is connected to the rear housing module; a first mounting cavity is formed between the front end and the rear end of the front housing module for accommodating the torque converter module; a second mounting cavity is formed between the rear end of the front housing module and the rear housing module for accommodating the power take-off module.

[0007] Furthermore, the power take-off module includes a central gear, a drive gear, a second support bearing, a support shaft, and a locking bolt; The central gear is fixedly connected to the pump wheel module; The drive gear is mounted on the support shaft via a second support bearing, and the drive gear meshes with the center gear. The support shaft is connected to the rear housing module by locking bolts.

[0008] Furthermore, the support shaft has a first threaded hole along the axial direction, and the rear housing module has a second threaded hole; The locking bolt is installed in the first threaded hole and the second threaded hole to connect the support shaft to the rear housing module; An axial deviation is provided between the axis of the outer wall of the support shaft and the axis of the first threaded hole, and an axial deviation is provided between the axis of the first threaded hole and the axis of the second threaded hole.

[0009] Furthermore, the cover wheel module also includes a lock-up clutch module, which includes a piston, a back plate, at least two friction plates, and at least two mating plates; The back plate is fixed to the cover wheel; The piston is installed inside the cover wheel, and a piston cavity is formed between the pressure surface of the piston and the cover wheel. A through hole is provided on the piston, and the through hole connects the piston cavity and the back pressure cavity of the piston. The mating plates and friction plates are installed between the piston and the back plate to constrain the axial rotation of the cover wheel; the friction plates and mating plates are spaced apart, with the friction plates located on the outer side.

[0010] Furthermore, the power transmission module also includes a guide wheel seat, a turbine shaft, a lock nut, and an output flange; The guide wheel seat is fixed on the rear housing module; Therefore, the output flange is fixed to the turbine shaft by a lock nut; The turbine shaft is mounted on the rear housing module via a third support bearing, and the rear housing module is equipped with the third support bearing. The pump wheel module is mounted on the guide wheel seat via a fourth support bearing.

[0011] Furthermore, it also includes a first retaining ring and a second retaining ring disposed on the guide wheel seat; The guide wheel module is supported on the guide wheel seat by a fifth support bearing and a one-way clutch; the guide wheel seat is provided with a first circumferential limiting step, a second circumferential limiting step and a third circumferential limiting step, a first retaining ring abuts against the first limiting step, and a second retaining ring abuts against the third circumferential limiting step; the fifth support bearing abuts against the first retaining ring and the second circumferential limiting step respectively; The rear end of the guide wheel seat abuts against the rear housing module; The second retaining ring abuts against the pump wheel module.

[0012] Furthermore, the torque converter module also includes a torsional damper module; The torsional damper module is located between the shield wheel module and the turbine module; the input end of the torsional damper module is connected to the friction plate, and the output end is connected to the output end of the turbine module.

[0013] Furthermore, the hydraulic control unit module includes a lock-up oil circuit; The locking oil circuit includes a hydraulic control unit locking oil circuit, a rear housing module locking oil circuit, a turbine shaft locking oil circuit, an input end cover locking oil circuit, and a cover wheel locking oil circuit connected in sequence. The cover wheel locking oil circuit is connected to the piston chamber.

[0014] Furthermore, the hydraulic control unit module also includes hydraulic oil circuits; The hydraulic circuit includes, in sequence, a guide wheel diameter annular oil circuit, a guide wheel seat and turbine shaft annular oil circuit, a guide wheel seat return oil circuit, and a rear housing module return oil circuit, as well as, in sequence, a main oil circuit, a rear housing module inlet oil circuit, a guide wheel seat inlet oil circuit, and a pump hub inlet oil circuit. The main oil circuit is connected to external hydraulic oil, and the pump hub inlet oil circuit is connected to the torque converter cavity. The guide wheel diameter annular oil circuit is connected to the torque converter cavity, and the rear housing module return oil circuit is connected to the outside.

[0015] Compared with the prior art, this application has the following beneficial effects: This application proposes a hydraulic torque converter transmission system. In this invention, the turbine module is axially constrained by a baffle plate and a shroud module placed on the turbine hub, thus forming a closed dimensional chain with the pump wheel module. This completes the axial positioning of the pump wheel module and the turbine module, eliminating the need for adjusting shims between the turbine module and the turbine shaft, and simplifying the assembly process of the torque converter assembly. The baffle plate is located within the first axial clearance. According to the force characteristics of the turbine module, during torque conversion, the turbine module is subjected to a thrust pointing towards the pump wheel. At this time, the baffle plate on the turbine hub and the first support bearing placed on the shroud contact each other, providing axial limitation. The turbine, guide wheel, and pump wheel form a complete torque converter impeller module, completing the torque conversion operation. During lock-up, the torque converter no longer performs torque conversion. The turbine module is subjected to a thrust pointing towards the shroud, eliminating the axial movement clearance between the turbine module and the input end cover. The theoretical clearance between the oil outlet of the turbine module and the guide wheel module increases, thereby increasing the oil outlet area of ​​the torque converter, reducing oil circulation resistance, and improving the working efficiency under lock-up conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the hydraulic torque converter transmission system of this application.

[0018] Figure 2 This is an assembly diagram of the cover wheel module and the turbine module in an embodiment of this application; Figure 4 for Figure 2 A magnified view of a portion of point D in the middle; Figure 5 This is a schematic diagram of the oil outlet between the turbine module and the guide wheel module in an embodiment of this application; Figure 6 This is a schematic diagram of the oil outlet between the turbine module and the guide wheel module in the locked direct drive mode in this embodiment of the application; Figure 7 This is a partial enlarged view of the lock-up clutch module in an embodiment of this application; Figure 8 This is a schematic diagram of the eccentric installation of the support shaft in an embodiment of this application; Figure 9 A comparison diagram of the pitch ratio and efficiency of the transmission system of this application and the comparative embodiment; Figure 10 This is a comparison diagram of the locking pressure response of the transmission system of this application and the comparative implementation scheme.

[0019] Among them, 1-torque converter module, 2-housing module, 3-hydraulic control unit module, 4-power take-off module, 5-power transmission module, 6-first retaining ring, 7-second retaining ring, 8-baffle plate, 11-shroud wheel module, 12-torsional damper module, 13-pump wheel module, 14-turbine module, 15-guide wheel module, 16-oil inlet, 17-oil outlet, 21-front housing module, 22-rear housing module, 31-hydraulic control unit lock-up oil circuit, 32-rear housing module lock-up oil circuit, 33-turbine shaft lock-up oil circuit, 34-input end cover lock-up oil circuit, 35-shroud wheel lock-up oil circuit, 36-piston chamber, 37-back pressure chamber, 41-guide wheel seat, 42-turbine shaft, 43-locking nut 44-Output flange, 51-Center gear, 52-Drive gear, 53-Second support bearing, 54-Support shaft, 55-Locking bolt, 111-Input end cover, 112-Cover wheel, 113-First support bearing, 114-Lock-in clutch module, 121-Input end of torsional damper module, 122-Output end of torsional damper module, 131-Pump wheel, 132-Fourth support bearing, 141-Turbine, 142-Turbine hub, 151-Guide wheel, 152-One-way clutch, 153-Fifth support bearing, 1141-Piston, 1142-Friction plate, 1143-Matching plate, 1144-Back plate, 1141a-Through hole, 222-Fourth support bearing.

[0020] Figure 3 This is a partial schematic diagram of the area near the piston in the comparative embodiment of this application.

[0021] Among them, 09-locking bolt, 010-adjusting shim, 014-turbine module, 042-turbine shaft, 0141-turbine, 0142-turbine hub, and 0143-locking disc. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] The housing of torque converter transmission system assemblies used in engineering machinery is generally made of one-piece casting, with the torque converter module 1 and power take-off module 4 placed in one housing. A stamped partition is used in the middle to separate the dry and wet parts, resulting in a deeper housing, which increases the difficulty of assembly, maintenance and disassembly.

[0029] During the use of the torque converter transmission system assembly, due to the complexity of the working conditions of construction machinery vehicles, the torque demand in the power take-off module 4 changes rapidly, resulting in large torque fluctuations. This can easily cause the locking bolts 55 of the fixed drive gear 52 to loosen, which in turn causes the support shaft 54 ​​to rotate relative to the housing, resulting in premature wear of the support shaft 54.

[0030] Some torque converter assemblies used in construction machinery are equipped with lock-up clutches, which improves the efficiency of the torque converter. However, due to the complexity of the working conditions of construction machinery, the lock-up slip value of the lock-up clutch is large and lock-up is frequent. At the same time, the lock-up pressure of the torque converter with large torque capacity is large, resulting in large lock-up pressure pulses, which seriously affects the driving comfort of the vehicle system.

[0031] To address the aforementioned issues, this application proposes a hydraulic torque converter transmission system, which may include a torque converter module 1, a housing module 2, a hydraulic control unit module 3, a power take-off module 4, a power transmission module 5, and a baffle plate 8.

[0032] The torque converter module 1 includes a shroud module 11, a pump wheel module 13, a turbine module 14, and a guide wheel module 15. The shroud module 11 includes a connected input end cover 111 and a shroud 112. The shroud module 11 primarily guides the flow direction of fluid entering the torque converter and protects core components such as the pump wheel 131 and turbine 141. The pump wheel module 13 converts fluid kinetic energy into pressure energy through rotation. The pump wheel module 13 typically has a series of blades to guide fluid flow and increase its pressure. The turbine module 14 converts the pressure energy generated by the pump wheel 131 into mechanical energy. As fluid flows through the turbine 141, the blades in the turbine module 14 rotate, driving the entire torque converter system. The guide wheel module 15 changes the flow direction of the fluid, ensuring that the fluid can effectively flow out of the turbine 141 and enter the next working cycle.

[0033] The power transmission module 5 includes a turbine shaft 42. The turbine shaft 42 is an important component connecting the turbine 141 and the transmission system, responsible for transmitting the power generated by the turbine 141 to the transmission system, thereby driving the vehicle or other equipment.

[0034] The turbine module 14 includes a turbine 141 and a turbine hub 142, with the turbine 141 mounted on the turbine shaft 42 via the turbine hub 142. The turbine 141 is the core component of the turbine 141 engine or turbine 141 machine, utilizing the power of fluid (typically combustion gas or steam) to drive the rotor's rotation. The turbine 141 converts the thermal energy of the fluid into mechanical energy, which is then transferred through the turbine shaft 42. The turbine hub 142 is the connecting component between the turbine 141 and the turbine shaft 42, serving to secure the turbine 141 to the turbine shaft 42.

[0035] like Figure 4The diagram shows the installation structure of the baffle 8. The input end cover 111 and the shroud wheel 112 are fixedly connected together, and then fixedly connected to the pump wheel module 13 to realize the power transmission from the input end cover 111 to the shroud wheel 112 to the pump wheel module 13. The shroud wheel module 11 also includes a first support bearing 113, which is installed between the shroud wheel 112 and the turbine hub 142. An annular groove is formed on the end face of the input end cover 111 where it abuts the first support bearing 113. The annular groove penetrates the inner hole of the input end cover 111, forming a first axial gap between the bottom of the annular groove and the first support bearing 113. The baffle 8 is installed on the turbine hub 142 and is located within the first axial gap, used to axially constrain the turbine 141 and the turbine hub 142.

[0036] In this application, the turbine module 14 is located between the shroud module 11 and the guide wheel module 15. The turbine module 14 can be radially supported on the turbine shaft 42 via a spline connection. A baffle 8 with a thickness of Δk is installed on the turbine hub 142. A first axial clearance example is placed between the input end cover 111 and the first support bearing 113. Assuming the axial length of the first axial clearance is Δt, the baffle 8 axially constrains the turbine module 14 and forms an axial movement clearance of Δt-Δk for the turbine module 14. The turbine module 14 forms a dimensional chain relationship through the baffle 8, the first support bearing 113, the shroud 112, and the pump wheel 131. The dimensional chain is relatively simple, eliminating the need for the adjusting shim between the turbine module 14 and the turbine shaft 42, thus simplifying the assembly process of the torque converter assembly.

[0037] like Figure 5 The diagram shows the oil outlet 17 between the turbine module 14 and the guide wheel module 15. An oil inlet 16 is formed between the pump wheel module 13 and the guide wheel module. Assuming the theoretical clearance of the oil outlet 17 between the turbine module 14 and the guide wheel module 15 is Δn, the turbine module 14, pump wheel module 13, and guide wheel module 15 form a complete circular loop for torque conversion. Figure 6 The diagram shows the oil outlet 17 between the turbine module 14 and the guide wheel module 15 in the lock-up direct drive mode. In lock-up direct drive mode, the direction of the hydraulic pressure on the turbine module 14 changes, pushing the turbine module 14 to the left along the turbine shaft 42. At this time, the theoretical clearance of the oil outlet 17 between the turbine module 14 and the guide wheel module 15 is Δn + (Δt - Δk), increasing the flow area of ​​the oil outlet 17. This reduces flow resistance, improves the oil circulation efficiency within the torque converter, and thus improves the working efficiency of the torque converter under lock-up conditions.

[0038] like Figure 1The diagram shown is a structural schematic of the hydraulic torque converter transmission system of this application. In an embodiment of this application, a hydraulic torque converter transmission system may include a torque converter module 1, a housing module 2, a hydraulic control unit module 3, a power take-off module 4, and a power transmission module 5.

[0039] The hydraulic control unit module 3 mainly includes two types of oil circuits: First, the main oil circuit receives hydraulic oil supplied from the outside. The torque converter inlet oil circuit controls the hydraulic oil to enter the torque converter cavity via the valve body → rear housing module 22 inlet oil circuit → guide wheel seat 41 inlet oil circuit → pump wheel 131 hub inlet oil circuit, etc. After completing the cycle, the oil flows through the diameter annular oil circuit between the turbine 141 and guide wheel 151 → the annular oil circuit between the guide wheel seat 41 and turbine shaft 42 → guide wheel seat 41 return oil circuit → rear housing module 22 return oil circuit, and then is discharged through the valve body for cooling and filtration. Second, when the hydraulic module receives a lock-up command, the lock-up valve opens, and the lock-up oil circuit flows through the hydraulic control unit lock-up oil circuit 31 → rear housing module lock-up oil circuit 32 → turbine shaft lock-up oil circuit 33 → input end cover lock-up oil circuit 34 → cover wheel lock-up oil circuit 35 into the piston chamber 36, pushing the piston 1141 to move and complete the lock-up.

[0040] The torque converter module 1 includes a cover wheel module 11, a torsional damper module 12, a pump wheel module 13, a turbine module 14, and a guide wheel module 15. For example... Figure 2 The diagram shows the structure of the cover wheel module and the turbine module in this application. The cover wheel module 11 includes an input end cover 111, a cover wheel 112, a lock-up clutch module 114, and a first support bearing 113. The input end cover 111 and the first support bearing 113 are both arranged on the cover wheel 112. An annular groove is formed on the end face of the input end cover 111 that abuts against the first support bearing 113. The annular groove penetrates the inner hole of the input end cover 111, forming a first axial gap between the bottom of the annular groove and the first support bearing 113. The locking clutch module 114 includes a piston 1141, a friction plate 1142, a mating plate 1143, and a back plate 1144. The back plate 1144 is fixed to the cover wheel 112. The piston 1141 is embedded in a groove within the cover wheel 112. The mating plate 1143 and the cover wheel 112 can achieve axial rotation constraint through a spline design. In other embodiments of this application, the mating plate 1143 and the cover wheel 112 can also achieve axial rotation constraint through other connection methods. The mating plate 1143 and the friction plate 1142 are both installed between the back plate 1144 and the piston 1141. The friction plate 1142 and the mating plate 1143 are spaced apart, and the friction plate 1142 is located between the mating plate 1143 and the back plate 1144. Additionally, as... Figure 7As shown, a through hole 1141a with a diameter of φm can be designed on the pressure surface of piston 1141 to connect the piston chamber 36 formed by the pressure surface of piston 1141 and the cover wheel 112, as well as the back pressure chamber 37 on the other side of piston 1141. When the lock-up oil pressure increases, a portion of the lock-up oil is discharged through the through hole 1141a, reducing the pressure pulse value at the moment of lock-up and slowing down the starting acceleration of piston 1141, thereby reducing the impact of piston 1141 engagement. At the same time, during depressurization, the high-pressure oil in piston chamber 36 can be discharged through two paths via the torque converter lock-up oil circuit and the through hole 1141a in piston 1141, improving the clutch unlocking speed and unlocking efficiency.

[0041] The housing module 2 includes a front housing module 21 for accommodating the torque converter module 1 and a rear housing module 22 for accommodating the power take-off module 4. The front end of the front housing module 21 is fitted onto and connected to the cover wheel 112, and its rear end is connected to the rear housing module 22. A first mounting cavity is formed between the front and rear ends of the front housing module 21 to accommodate the torque converter module 1. A second mounting cavity is formed between the retaining ring area at the rear end of the front housing module 21 and the rear housing module 22 to accommodate various components of the power take-off module 4. The housing module 2 adopts a split housing design. The inner cavity of the front housing module 21 accommodates the torque converter module 1, forming the dry area of ​​the torque converter assembly. The rear part of the front housing module 21 and the rear housing module 22 are used to house the power take-off module 4 and contain lubricating oil, forming the wet area of ​​the torque converter assembly, thus improving the assembly convenience of the torque converter assembly.

[0042] The power take-off module 4 includes a central gear 51, a drive gear 52, a second support bearing 53, a support shaft 54, and a locking bolt 55. The central gear 51 is fixedly connected to the pump wheel module 13 and rotates at the same speed and in the same direction. The drive gear 52 is mounted on the support shaft 54 ​​via the second support bearing 53 and meshes with the central gear 51. The support shaft 54 ​​is connected to the rear housing module 22 via the locking bolt 55, allowing the drive gear 52 to rotate around the second support bearing 53. Since the central gear 51 and drive gear 52 can transmit power through meshing, the power is output via the input end cover 111 → cover wheel 112 → pump wheel module 13 → central gear 51 → drive gear 52 → spline sleeve, achieving torque splitting and transmission. Additionally, as... Figure 8The diagram shows the eccentric installation of the support shaft 54. The support shaft 54 ​​has a first threaded hole along its axial direction, and the rear housing module 22 has a second threaded hole. A locking bolt 55 is installed in both the first and second threaded holes, connecting the support shaft 54 ​​to the rear housing module 22. An axial deviation is set between the axis of the outer wall of the support shaft 54 ​​and the axis of the first threaded hole, and also between the axes of the first and second threaded holes. Both axial deviations are M. The eccentric design of the support shaft 54 ​​installation prevents the locking bolt 55 from loosening due to frequent torque fluctuations in the power take-off gear, and also prevents premature wear of the support shaft 54 ​​caused by its rotation.

[0043] The power transmission module 5 includes a guide wheel seat 41, a turbine shaft 42, a locking nut 43, and an output flange 44. The guide wheel seat 41 is fixed to the rear housing module 22 and cannot rotate. The output flange 44 is fixed to the turbine shaft 42 by the locking nut 43. The turbine shaft 42 is mounted on the rear housing module 22 via a third support bearing. The pump wheel module 13 is mounted on the guide wheel seat 41 via a fourth support bearing 222 and can rotate freely. The turbine shaft 42 and the output flange 44 serve as the power input and output modules and can rotate freely.

[0044] The guide wheel module 15 is supported on the guide wheel seat 41 by the fifth support bearing 153 and the one-way clutch 152, which enables the guide wheel module 15 to rotate in one direction and lock in the opposite direction, thereby realizing the torque conversion function of the torque converter. Both the pump wheel module 13 and the guide wheel module 15 are axially constrained by the shaft shoulder and the elastic retaining ring. The guide wheel seat 41 is provided with a first retaining ring 6 and a second retaining ring 7. The guide wheel seat 41 is provided with a first circumferential limiting step, a second circumferential limiting step and a third circumferential limiting step. The first retaining ring 6 abuts against the first limiting step, the second retaining ring 7 abuts against the third circumferential limiting step, the fifth support bearing 153 abuts against the first retaining ring 6 and the second circumferential limiting step respectively, the rear end of the guide wheel seat 41 abuts against the rear housing module 22, and the second retaining ring 7 abuts against the pump wheel module 13.

[0045] The torsional damper module 12 in the torque converter module 1 is located between the cover wheel module 11 and the turbine module 14. The input end 121 of the torsional damper module can be connected to the friction plate 1142 via a spline, and the output end 122 of the torsional damper module can be connected to the output end of the turbine module 14 via a spline.

[0046] like Figure 2As shown, the turbine module 14 includes a turbine 141 and a turbine hub 142. The turbine module 14 is located between the shield wheel module 11 and the guide wheel module 15. It can be radially supported on the turbine shaft 42 by means of a spline connection. A baffle 8 with a thickness of △k is installed on the turbine hub 142. A first axial gap with a gap of △t is formed on the right side of the input end cover 111 and the left side of the first support bearing 113, which axially constrains the turbine module 14 and forms a turbine shaft 42 movement gap of △t-△k.

[0047] When piston 1141 moves to the right, friction plate 1142, mating plate 1143, piston 1141, and back plate 1144 are pressed together, and power is output through input end cover 111 → cover wheel 112 → mating plate 1143 → friction plate 1142 → torsional damper module 12 → turbine shaft 42 → output flange 44. When the lock-up clutch module 114 is not locked, power is output through input end cover 111 → cover wheel 112 → pump wheel module 13 → turbine module 14 (guide wheel module 15) → turbine shaft 42 → output flange 44.

[0048] In other embodiments of this application, the connection method between the above-mentioned specific structures can also be replaced by other connection methods. Furthermore, the specific installation positions and oil circuit paths of the two oil circuits in the above-mentioned hydraulic control unit can be adjusted according to actual needs, and this application does not impose any restrictions.

[0049] The hydraulic torque converter transmission system proposed in this application can achieve the following functions: (1) Power take-off mode: The center gear 51 and the drive gear 52 mesh together to transmit power. The power from the power source passes through the input end cover 111 → cover wheel 112 → pump wheel module 13 → center gear 51 → drive gear 52 in sequence to output power, realizing torque splitting and transmission.

[0050] (2) Torque-changing working mode When the locking clutch module 114 is not under pressure, the mating plates 1143 and 1142 are not engaged. The power from the power source passes sequentially through the input end cover 111 → cover wheel 112 → pump wheel module 13 → turbine module 14 → turbine shaft 42 → output flange 44 for power output. The pump wheel module 13 pressurizes and accelerates the oil in the torque converter module 1 chamber and discharges it from the outlet of the pump wheel 131. Then it enters and exits from the inlet of the turbine 141, driving the turbine 141 to rotate. After circulating in the turbine 141 chamber, the oil is discharged from the outlet of the turbine 141 and enters the guide wheel 151. Since the guide wheel 151 is restricted by the one-way locking function of the one-way clutch 152, it cannot rotate. Therefore, the hydraulic force is reacted on the blades of the turbine 141 to amplify the torque, thereby realizing the torque conversion function.

[0051] like Figure 5 As shown, under torque conversion conditions, the turbine module 14 is subjected to an axial force toward the right. The turbine module 14 moves axially to the right along the turbine shaft 42. The baffle 8 and the first support bearing 113 contact each other to complete the axial limit. The turbine module 14 forms a dimensional chain relationship through the baffle 8, the first support bearing 113, the cover wheel 112 and the pump wheel 131. At this time, the theoretical gap of the oil outlet 17 between the turbine module 14 and the guide wheel module 15 is Δn. The turbine module 14, the pump wheel module 13 and the guide wheel module 15 form a complete circular loop to perform torque conversion.

[0052] (3) Locked direct drive mode When the hydraulic control unit module 3 receives the lock-up command, the lock-up valve opens, and the lock-up oil circuit enters the piston chamber 36 through the lock-up clutch oil circuit → rear housing module lock-up oil circuit 32 → turbine shaft lock-up oil circuit 33 → input end cover lock-up oil circuit 34 → cover wheel lock-up oil circuit 35. This pushes the piston 1141 to overcome the hydraulic centrifugal force and move to the right, eliminating and pressing the gap between the friction plate 1142, the mating plate 1143, and the back plate 1144. This connects the cover wheel 112 and the torsional damper module 12. Power from the power source is output through the input end cover 111 → cover wheel 112 → mating plate 1143 → friction plate 11423 → torsional damper → turbine shaft 42 → output flange 44. To verify the effectiveness of this application, the transmission system of this application is compared with a comparative implementation scheme that uses adjusting shims. Figure 3 The image shown is a partial schematic diagram of the area near the piston in the comparative implementation scheme.

[0053] In the comparative implementation scheme, the turbine module 014 includes a turbine 0141, a turbine hub 0142, and a locking disc 0143. The turbine 0141, turbine hub 0142, and locking disc 0143 are fixedly connected and cannot rotate relative to each other or move axially. The right end face of the locking disc 0143 fits against the left end face of the turbine shaft 042, fixing the turbine module 014 to the left end face of the turbine shaft 042. Since there are many dimensional chain elements between the left end face of the turbine shaft 042 and the left end face of the pump wheel module, a theoretical gap of Δj is reserved between the right end face of the locking disc 0143 and the left end face of the turbine shaft 042 to ensure the axial positional accuracy of the turbine module 014, pump wheel module, and guide wheel module. During assembly, the gap is adjusted by setting an adjusting shim 010 to ensure the axial positional accuracy of the turbine module 014. The locking disc 0143 and the adjusting shim 010 are fixed to the turbine shaft 042 by locking bolts 09.

[0054] like Figure 9 The diagram shown is a comparison of the pitch ratio and efficiency of the transmission system of this application and the comparative embodiment. Figure 10 The figure shown is a comparison of the locking pressure response of the transmission system of this application and the comparative embodiment. From... Figure 9 and Figure 10 It can be seen that the transmission system of this application has obvious advantages.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic torque converter transmission system, comprising a torque converter module (1), a housing module (2), a hydraulic control unit module (3), a power take-off module (4), and a power transmission module (5); the torque converter module (1) comprises a cover wheel module (11), a pump wheel module (13), a turbine module (14), and a guide wheel module (15); the power transmission module (5) comprises a turbine shaft (42); the turbine module (14) comprises a turbine (141) and a turbine hub (142), the turbine (141) being mounted on the turbine shaft (42) via the turbine hub (142); the cover wheel module (11) comprises a connected input end cover (111) and a cover wheel (112); characterized in that: It also includes a baffle (8); The input end cap (111), the cover wheel (112), and the pump wheel module (13) are fixedly connected; The cover wheel module (11) also includes a first support bearing (113), which is installed between the cover wheel (112) and the turbine hub (142). An annular groove is provided on the end face of the input end cover (111) that abuts against the first support bearing (113). The annular groove penetrates the inner hole of the input end cover (111) and forms a first axial gap between the bottom of the annular groove and the first support bearing (113). The baffle (8) is mounted on the turbine hub (142) and is located within the first axial clearance, for axial constraint of the turbine (141) and the turbine hub (142).

2. The hydraulic torque converter transmission system according to claim 1, characterized in that: The housing module (2) includes a front housing module (21) and a rear housing module (22); The front end of the front housing module (21) is sleeved on the outside of the cover wheel (112) and connected to the cover wheel (112), and the rear end is connected to the rear housing module (22); a first mounting cavity is formed between the front end and the rear end of the front housing module (21) for accommodating the torque converter module (1); a second mounting cavity is formed between the rear end of the front housing module (21) and the rear housing module (22) for accommodating the power take-off module (4).

3. The hydraulic torque converter transmission system according to claim 2, characterized in that: The power take-off module (4) includes a central gear (51), a drive gear (52), a second support bearing (53), a support shaft (54), and a locking bolt (55); The central gear (51) is fixedly connected to the pump wheel module (13); The drive gear (52) is mounted on the support shaft (54) via the second support bearing (53), and the drive gear (52) meshes with the center gear (51); The support shaft (54) is connected to the rear housing module (22) by a locking bolt (55).

4. The hydraulic torque converter transmission system according to claim 3, characterized in that: The support shaft (54) has a first threaded hole along the axial direction, and the rear housing module (22) has a second threaded hole. The locking bolt (55) is installed in the first threaded hole and the second threaded hole to connect the support shaft (54) to the rear housing module (22); An axial deviation is provided between the axis of the outer wall of the support shaft (54) and the axis of the first threaded hole, and an axial deviation is provided between the axis of the first threaded hole and the axis of the second threaded hole.

5. The hydraulic torque converter transmission system according to claim 4, characterized in that: The cover wheel module (11) also includes a lock-up clutch module (114), which includes a piston (1141), a back plate (1144), at least two friction plates (1142) and at least two mating plates (1143). The back plate (1144) is fixed to the cover wheel (112); The piston (1141) is installed inside the cover wheel (112), and a piston chamber (36) is formed between the pressure surface of the piston (1141) and the cover wheel (112). A through hole (1141a) is provided on the piston (1141), and the through hole (1141a) connects the piston chamber (36) and the back pressure chamber (37) of the piston (1141). The mating plate (1143) and friction plate (1142) are installed between the piston (1141) and the back plate (1144) to constrain the axial rotation of the cover wheel (112); the friction plate (1142) and mating plate (1143) are spaced apart, and the friction plate (1142) is located on the outside.

6. The hydraulic torque converter transmission system according to claim 5, characterized in that: The power transmission module (5) also includes a guide wheel seat (41), a turbine shaft (42), a locking nut (43), and an output flange (44); The guide wheel seat (41) is fixed on the rear housing module (22); Therefore, the output flange (44) is fixed to the turbine shaft (42) by the lock nut (43); The turbine shaft (42) is mounted on the rear housing module (22) via a third support bearing, and the rear housing module (22) is equipped with the third support bearing; The pump wheel module (13) is mounted on the guide wheel seat (41) via the fourth support bearing (222).

7. The hydraulic torque converter transmission system according to claim 6, characterized in that: It also includes a first retaining ring (6) and a second retaining ring (7) disposed on the guide wheel seat (41); The guide wheel module (15) is supported on the guide wheel seat (41) by the fifth support bearing (153) and the one-way clutch (152); the guide wheel seat (41) is provided with a first circumferential limiting step, a second circumferential limiting step and a third circumferential limiting step, the first retaining ring (6) abuts against the first limiting step, and the second retaining ring (7) abuts against the third circumferential limiting step; the fifth support bearing (153) abuts against the first retaining ring (6) and the second circumferential limiting step respectively; The rear end of the guide wheel seat (41) abuts against the rear housing module (22); The second retaining ring (7) abuts against the pump wheel module (13).

8. The hydraulic torque converter transmission system according to claim 7, characterized in that: The torque converter module (1) also includes a torsional damper module (12); The torsional damper module (12) is located between the cover wheel module (11) and the turbine module (14); the input end of the torsional damper module (12) is connected to the friction plate (1142), and the output end is connected to the output end of the turbine module (14).

9. The hydraulic torque converter transmission system according to claim 8, characterized in that: The hydraulic control unit module (3) includes a lock-up oil circuit; The locking oil circuit includes a hydraulic control unit locking oil circuit (31), a rear housing module locking oil circuit (32), a turbine shaft locking oil circuit (33), an input end cover locking oil circuit (34), and a cover wheel locking oil circuit (35) connected in sequence. The cover wheel locking oil circuit (35) is connected to the piston chamber (36).

10. The hydraulic torque converter transmission system according to claim 9, characterized in that: The hydraulic control unit module (3) also includes a hydraulic oil circuit; The hydraulic circuit includes a guide wheel (151) diameter annular oil circuit, a guide wheel seat (41) and turbine shaft (42) annular oil circuit, a guide wheel seat (41) return oil circuit, a rear housing module (22) return oil circuit, and a main oil circuit, a rear housing module (22) inlet oil circuit, a guide wheel seat (41) inlet oil circuit, and a pump wheel (131) hub inlet oil circuit connected in sequence. The main oil circuit is connected to external hydraulic oil, and the pump wheel (131) hub inlet oil circuit is connected to the torque converter cavity. The guide wheel (151) has a diameter annular oil passage that is connected to the torque converter cavity, and the rear housing module (22) has a return oil passage that is connected to the outside.

Images