CN215673454U

CN215673454U - Non-one-way clutch type hydraulic torque converter

Info

Publication number: CN215673454U
Application number: CN202121551871.4U
Authority: CN
Inventors: 刘育; 李玉峰; 孙润; 张森; 谭向君; 赵展虎
Original assignee: Zhejiang Wanliyang New Energy Drive Co ltd
Current assignee: Zhejiang Wanliyang New Energy Drive Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2022-01-28
Anticipated expiration: 2031-07-08

Abstract

The utility model relates to a one-way clutch-free hydraulic torque converter which comprises a locking clutch assembly, a turbine assembly, a pump wheel assembly and a guide wheel assembly, wherein a guide wheel in the guide wheel assembly is rigidly connected with a guide wheel shaft, the locking clutch assembly locks the turbine assembly and the pump wheel assembly before the hydraulic torque converter enters a coupling point, the turbine assembly and the pump wheel assembly synchronously rotate, the guide wheel in the guide wheel assembly does not rotate, and the guide wheel in the guide wheel assembly does not rotate after the hydraulic torque converter enters the coupling point. The hydraulic torque converter has the characteristics that on the basis of the traditional hydraulic torque converter, the one-way clutch on the guide wheel is cancelled, so that the guide wheel cannot rotate clockwise or anticlockwise, the locking clutch is locked in advance before the coupling point, the interval of torque attenuation caused by the fact that the guide wheel cannot rotate clockwise after the hydraulic torque converter enters the coupling point is effectively avoided, the cost of the hydraulic torque converter is reduced under the condition that the use requirement is met, and the like.

Description

Non-one-way clutch type hydraulic torque converter

Technical Field

The utility model relates to a one-way clutch-free hydraulic torque converter, belonging to the technical field of mechanical transmission.

Background

Typical starting mechanisms commonly used in automatic transmissions include a torque converter and a starting clutch. Such as AT, CVT, DCT. The hydraulic torque converter takes transmission oil as a transmission medium AT the starting stage, so that the starting comfort is good, and the hydraulic torque converter has a torque increasing effect AT the starting stage, so that the hydraulic torque converter is widely applied to AT/CVT transmissions. The starting dynamic property and the comfort of the vehicle can be improved. The traditional hydraulic torque converter comprises a pump impeller, a turbine, a guide wheel, a shock absorber, a locking clutch, a one-way clutch and the like.

The one-way clutch in the current torque converter can ensure that the guide wheel can only rotate clockwise (seen from an engine to a transmission side) and can not rotate anticlockwise. In the starting stage of the vehicle, the torque transmitted by the pump wheel is transmitted to the turbine through oil, the oil enters the guide wheel again after the action of the turbine, the acting force applied to the guide wheel by the fluid is opposite to that of the turbine, the guide wheel is fixed and does not rotate under the action of the one-way clutch, the fluid reversely impacts the turbine after flowing through the guide wheel, and the output torque of the hydraulic torque converter is theoretically equal to the sum of the input torque and the reaction torque of the guide wheel on the hydraulic oil, so that the torque increasing effect is achieved. As the difference between the impeller and turbine speed decreases, the torque converter begins to enter the coupling point, and after the coupling point is crossed, the fluid applies the same force to the stator as the turbine, creating a clockwise torque to the stator. Since the one-way clutch allows the stator to rotate clockwise, the stator starts to rotate clockwise by the impact of the hydraulic oil. Because the guide wheel which rotates freely has no reaction moment to the hydraulic oil, the hydraulic oil is only acted by the reaction moment of the pump wheel and the turbine wheel. Therefore, the torque converter cannot increase torque, and the operating characteristics of the torque converter are the same as those of the fluid coupling. Generally, the effect of one-way clutch is that make the stator fixed not changeing before the coupling point, increase output torque, the coupling point back and turbine equidirectional rotation avoid fluid reverse impact turbine to lead to turbine output torque to descend by a wide margin. In addition, the damping loss can be reduced also in the case where the low-speed slip clutch is unlocked. This is also the role of the one-way clutch in the torque converter.

The existing hydraulic torque converter aims at improving efficiency and reducing oil consumption of the whole vehicle. All be furnished with the clutch of taking the slip function, torque converter makes pump impeller and turbine locking in advance through the control to the clutch under the low speed of a motor vehicle, and torque converter gets into rigid connection from fluid operating mode, combines the bumper shock absorber of bigger corner for torque converter can promote torque converter transmission efficiency in advance at the low speed of a motor vehicle locking in advance under the speed of a motor vehicle, guarantees whole car travelling comfort. Along with the optimization of the locking clutch, the speed difference range of locking is larger and larger, so that the locking point under the basically full working condition can ensure that the working condition of unlocking under the working condition of low-speed sliding or sudden braking also occupies a smaller proportion before the coupling point. So that the one-way clutch does not play a role in enabling the guide pulley to rotate clockwise after the coupling point, but rather increases the cost. At present one-way clutch is behind the coupling point, and the guide pulley can rotate clockwise, but only when neutral gear idle speed, plays the effect that prevents the decay of output torque, under other operating modes, does not play too big effect, and the neutral gear state accounts for than less under whole car circulation operating mode, and the moment of torsion decay is also less to whole car performance, so one-way clutch does not play too big effect.

Disclosure of Invention

The utility model aims to provide a hydraulic torque converter without a one-way clutch, which solves the problems that in the prior art, after the existing locking clutch is optimized, the one-way clutch does not play a large role except a few neutral idle states under the whole vehicle working condition, so that the resource waste is caused, the phase change is increased, and the cost is increased.

The technical purpose of the utility model is mainly solved by the following technical scheme: a one-way clutch-free hydraulic torque converter comprises a locking clutch assembly, a turbine assembly, a pump wheel assembly and a guide wheel assembly, wherein a guide wheel in the guide wheel assembly is rigidly connected with a guide wheel shaft; the locking clutch assembly, the turbine assembly, the pump wheel assembly and the guide wheel assembly are mutually linked to form the hydraulic torque converter, the guide wheel in the guide wheel assembly is rigidly connected with the guide wheel shaft, the one-way clutch can be cancelled, so that the guide wheel cannot rotate clockwise and anticlockwise, the guide wheel does not rotate after the hydraulic torque converter enters a coupling point, the locking clutch locks the turbine assembly and the pump wheel assembly with the locking clutch before the hydraulic torque converter enters the coupling point and after the hydraulic torque converter enters the coupling point, a torque attenuation interval caused by the fact that the guide wheel cannot rotate clockwise after the hydraulic torque converter enters the coupling point can be avoided, and the cost of the hydraulic torque converter is reduced under the condition that the use requirement is met.

Preferably, a guide wheel in the guide wheel assembly is connected with a guide wheel shaft through a spline; the guide wheel in the guide wheel assembly is connected with the guide wheel shaft through the spline, so that the guide wheel is rigidly connected with the guide wheel shaft, the guide wheel cannot rotate, the arrangement of the one-way clutch is reduced, and the cost is reduced.

Preferably, the pump wheel assembly is connected with the engine flexible disk through a spline; the pump wheel assembly is connected with the engine flexible disk through the spline, so that the connection reliability between the pump wheel assembly and the engine is improved, and the stability of power transmission is ensured.

Preferably, the turbine assembly is connected with the transmission input shaft through a spline; the turbine assembly is connected with the transmission input shaft through the spline, so that the connection strength of the connection part between the turbine assembly and the transmission input shaft is enhanced, and the transmission of power is realized.

Preferably, a damper is mounted on the turbine assembly; the damper plays a role in damping in the locking process or after locking of the hydraulic torque converter, and improves the comfort of the whole vehicle in the locking process and after locking.

Therefore, the hydraulic torque converter has the characteristics that on the basis of the traditional hydraulic torque converter, the one-way clutch on the guide wheel is omitted, the guide wheel is rigidly connected with the guide wheel shaft through a spline or other forms, so that the guide wheel cannot rotate clockwise or anticlockwise, the locking clutch is locked in advance before a coupling point, a torque attenuation interval caused by the fact that the guide wheel cannot rotate clockwise after the hydraulic torque converter enters the coupling point is effectively avoided, the cost of the hydraulic torque converter is reduced under the condition that the use requirement is met, and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

As shown in fig. 1, a torque converter without a one-way clutch includes a lock-up clutch assembly 1, a turbine assembly 2, a pump assembly 3, and a guide wheel assembly 4, wherein a guide wheel in the guide wheel assembly 4 is rigidly connected to a guide wheel shaft, the lock-up clutch assembly 1 locks the turbine assembly 2 and the pump assembly 3 before the torque converter enters a coupling point, the turbine assembly 2 and the pump assembly 3 rotate synchronously, the guide wheel in the guide wheel assembly 4 does not rotate, and the guide wheel in the guide wheel assembly 4 does not rotate after the torque converter enters the coupling point.

The hydraulic torque converter is based on the traditional hydraulic torque converter, a one-way clutch on a guide wheel is omitted, and the guide wheel is rigidly connected with a guide wheel shaft through a spline or other forms, so that the guide wheel cannot rotate clockwise or anticlockwise; the slip control of the internal locking clutch is used for controlling the early locking, so that the corresponding speed ratio point is ensured to be in front of the coupling point when the hydraulic torque converter is locked, namely the early locking is carried out before the coupling point. The interval that torque attenuation is caused by the fact that the guide wheel cannot rotate clockwise after the hydraulic torque converter enters the coupling point is avoided, and the system cost is reduced under the condition that the use requirement is met.

The engine power is transmitted to the turbine assembly through the pump wheel assembly before the locking of the locking clutch assembly and is transmitted to the input shaft of the transmission through the turbine assembly, the torque increasing function is achieved by means of the existence of the guide wheel assembly in the starting stage, after the locking clutch assembly is locked, the engine power is transmitted to the locking clutch assembly through the pump wheel assembly, is transmitted to the shock absorber through the locking clutch assembly and is finally transmitted to the input shaft of the transmission.

The guide wheel in the guide wheel assembly 4 is connected with the guide wheel shaft 41 through a spline; the guide wheel in the guide wheel assembly 4 can be rigidly connected with the guide wheel shaft 41 in other directions; the pump wheel assembly 3 is connected with the engine flexible disk through a spline; the turbine assembly 2 is connected with a transmission input shaft 5 through a spline; the turbine assembly 2 is provided with a shock absorber 6; the shock absorber only plays the absorbing effect at the torque converter sliding friction in-process or after the locking, improves the locking in-process and locks the travelling comfort of whole car after.

In the starting stage, the guide wheel does not rotate, oil is driven to rotate through the pump wheel assembly 3 connected with the engine and then is impacted into the turbine assembly 2, the oil flowing through the turbine assembly 2 enters the turbine assembly 2 again after passing through the guide wheel assembly 4, and power is input to the transmission end through the transmission input shaft 5 connected with the turbine assembly 2, so that the starting function is realized. In the starting phase, the lock-up clutch assembly 1 and the damper 6 are deactivated.

And a locking stage, wherein slip control of the locking clutch assembly 1 is realized through oil pressure, engine power bypasses the turbine assembly 2 and is directly transmitted to the transmission input shaft 5 through the locking clutch assembly 1 through the shock absorber 6, and the hydraulic torque converter is locked in advance before a coupling point in order to avoid torque attenuation after the hydraulic torque converter enters the coupling point.

In the complete locking stage, the engine power is directly transmitted to the input shaft 5 of the transmission through the damper 6 directly by the locking clutch 1, and the stator assembly 4 and the turbine assembly 2 are not in use.

And in the unlocking stage, the locking clutch assembly 2 is released through oil pressure control, the pump wheel assembly 3 and the shock absorber 6 are disconnected through the locking clutch assembly 1, and the engine power enters the turbine assembly 2 through the pump wheel assembly 3 through fluid transmission and is transmitted to the transmission input shaft 5 through the turbine assembly 2.

Claims

1. A kind of torque converter without unidirectional clutch, characterized by that: the hydraulic torque converter comprises a locking clutch assembly (1), a turbine assembly (2), a pump wheel assembly (3) and a guide wheel assembly (4), wherein a guide wheel in the guide wheel assembly (4) is rigidly connected with the guide wheel shaft, the locking clutch assembly (1) locks the turbine assembly (2) and the pump wheel assembly (3) before the hydraulic torque converter enters a coupling point, the turbine assembly (2) and the pump wheel assembly (3) synchronously rotate, the guide wheel in the guide wheel assembly (4) does not rotate, and the guide wheel in the guide wheel assembly (4) does not rotate after the hydraulic torque converter enters the coupling point.

2. The torque converter of one-way clutch-less type according to claim 1, characterized in that: and the guide wheel in the guide wheel assembly (4) is connected with the guide wheel shaft (41) through a spline.

3. The torque converter of one-way clutch-less type according to claim 1 or 2, characterized in that: the pump wheel assembly (3) is connected with the engine flexible disk through a spline.

4. The torque converter of one-way clutch-less type according to claim 1 or 2, characterized in that: the turbine assembly (2) is connected with the transmission input shaft (5) through a spline.

5. The torque converter of one-way clutch-less type according to claim 1 or 2, characterized in that: and a damper (6) is arranged on the turbine assembly (2).