阅读说明：本技术 扭转弹簧膨胀鼓式缓速离合器 (Torsion spring expansion drum type slow clutch ) 是由 苗春才 于 2019-11-01 设计创作，主要内容包括：该发明涉及汽车离合器技术领域。该扭转弹簧膨胀鼓式缓速离合器,其特征主要包括：弹簧摩擦套(1),弹簧衬套(2),泵油管(3),螺旋扭转弹簧(4),输入扭转盘(6),油缸通油孔(7),盘式扭转油缸(8)。若干螺旋扭转弹簧(4)平行盘绕若干圈在弹簧衬套(2)上并向内收紧。通过泵油管(3)和油缸通油孔(7)向盘式扭转油缸(8)空腔注入一定压强液压油,盘式扭转油缸(8)使弹簧衬套(2)相对输入扭转盘(6)顺时针扭转螺旋扭转弹簧(4)产生向外膨胀力。缓速控制液压油压强,螺旋扭转弹簧(4)与输出弹簧摩擦套(1)摩擦阻力缓速增加,输出弹簧摩擦套(1)与输入扭转盘(6)结合扭矩缓速增加,离合器能实现缓速离合。(The invention relates to the technical field of automobile clutches. This torsion spring expansion drum formula retarder clutch, its characterized in that mainly includes: the oil pump comprises a spring friction sleeve (1), a spring bushing (2), an oil pumping pipe (3), a spiral torsion spring (4), an input torsion disc (6), an oil cylinder oil through hole (7) and a disc type torsion oil cylinder (8). A plurality of helical torsion springs (4) are wound on the spring bushing (2) in parallel by a plurality of turns and tightened inwards. Hydraulic oil with a certain pressure is injected into a cavity of the disc-type torsion oil cylinder (8) through the oil pumping pipe (3) and the oil cylinder oil through hole (7), and the disc-type torsion oil cylinder (8) enables the spring bushing (2) to be relatively input into the torsion disc (6) to clockwise twist the spiral torsion spring (4) to generate outward expansion force. The pressure of hydraulic oil is slowly controlled, the frictional resistance of the spiral torsion spring (4) and the output spring friction sleeve (1) is slowly increased, the combined torque of the output spring friction sleeve (1) and the input torsion disc (6) is slowly increased, and the clutch can realize slow clutch.)

1. A torsion spring expansion drum type slow clutch comprises an output spring friction sleeve (1), a spring bushing (2), an oil pumping pipe (3), a spiral torsion spring (4), a multi-plate clutch (5), an input torsion disc (6), an oil cylinder oil through hole (7), a disc type torsion oil cylinder (8), a multi-plate clutch piston oil duct (9), a multi-plate clutch piston (10) and a friction sleeve friction groove (11). The method is characterized in that:

(1) the spring bushing (2) is wound around a plurality of spiral torsion springs (4) in parallel for a plurality of turns.

(2) Plate pistons are mounted on both the spring bushing (2) and the input torsion disc (6). The spring bushing (2), the input torsion disc (6), the piston of the spring bushing (2) and the piston of the input torsion disc (6) jointly enclose two sealed disc type torsion oil cylinders (8). An oil cylinder oil through hole (7) in the oil cylinder leads to the pump oil pipe (3).

2. The torsion spring expansion drum retarder clutch according to claim one, in which several helical torsion springs (4) are wound in parallel several turns on the spring bushing (2) and tightened inwards. The left end of the spiral torsion spring (4) is clamped in the clamping groove of the spring bushing (2), and the right end of the spiral torsion spring (4) is clamped in the clamping groove of the input torsion disc (6). The input torsion disc (6) and the spring bushing (2) are mounted in a shaft sleeve mode. The input torsion plate (6) and the spring bushing (2) are twisted oppositely, and the spiral torsion spring (4) can expand outwards or contract inwards.

3. A torsion spring expansion drum retarder clutch according to claim one, in which the output spring friction sleeve (1) is rotatably mounted with the spring bushing (2) in a bushing manner, the output spring friction sleeve (1) being housed outside the helical torsion spring (4). When the clutch is not combined, the spiral torsion spring (4) is tightened on the spring bushing (2), and a sufficient gap is kept between the outer friction surface of the spiral torsion spring (4) and the inner friction surface of the output spring friction sleeve (1). At this time, there is no relative friction between the output spring friction sleeve (1) and the spring bushing (2). The power source is connected to the input torsion disc (6), and the load is connected to the output spring friction sleeve (1).

4. The torsion spring expansion drum type retarder clutch as claimed in claim one, wherein the spring bushing (2) rotates clockwise with the input torsion disc (6) as a reference, the torsion force between the input torsion disc (6) and the spring bushing (2) is larger than the resilience force of the helical torsion spring (4), the helical torsion spring (4) is twisted and expands outwards, the pressure between the outer friction surface of the helical torsion spring (4) and the inner friction surface of the output spring friction sleeve (1) increases slowly, the contact surface area between the helical torsion spring (4) and the output spring friction sleeve (1) increases slowly, the friction resistance between the helical torsion spring (4) and the output spring friction sleeve (1) increases slowly, the torque of the output spring friction sleeve (1) and the input torsion disc (6) increases slowly, and the retarder clutch can be realized.

5. The torsion spring expansion drum retarder clutch according to claim one, wherein the input and output ends of the inventive disc torsion cylinder (8) are fixed with the spring bushing (2) and the input torsion disc (6), respectively. Hydraulic oil with certain pressure is injected into a cavity of the disc-type torsion oil cylinder (8) through the oil pumping pipe (3) and the oil cylinder oil through hole (7), relative torque is generated between the spring bushing (2) and the input torsion disc (6) under the pressure, the torque value corresponds to the pressure of the hydraulic oil, namely the pressure of the hydraulic oil corresponds to the outward expansion torsion force of the corresponding spiral torsion spring (4), the torsion force overcomes the resilience force of the spiral torsion spring (4), the spring bushing (2) is twisted clockwise relative to the input torsion disc (6), and the outward expansion force of the spiral torsion spring (4) is generated.

6. The torsion spring expanding drum retarder clutch according to claim one, the invention power is inputted from the input torsion plate (6), and the input torsion plate (6) rotates counterclockwise. When hydraulic oil with a certain pressure is injected into a cavity of the disc type torsion oil cylinder (8) through the pump oil pipe (3) and the oil cylinder oil through hole (7), firstly, the hydraulic oil pushes the multi-plate clutch piston (10) through the multi-plate clutch piston oil duct (9) to press the multi-plate clutch (5), and the frictional resistance between the multi-plate clutch (5) enables the output spring friction sleeve (1) and the input torsion disc (6) to generate pre-combination friction force.

7. A torsion spring expanding drum retarder clutch according to claims five and six, the inventive power being input from the input torsion disc (6), the input torsion disc (6) rotating anticlockwise. When hydraulic oil with a certain pressure is injected into the cavity of the disc-type torsion oil cylinder (8) through the pump oil pipe (3) and the oil cylinder oil through hole (7), firstly, the hydraulic oil causes the friction resistance generated by the multi-plate clutch (5) to generate a combination torque between the output spring friction sleeve (1) and the input torsion disc (6). Then the hydraulic oil entering the cavity of the disc type torsion oil cylinder (8) pushes the spiral torsion spring (4) to expand outwards, and the combined torque of the output spring friction sleeve (1) and the input torsion disc (6) is increased slowly along with the increase of the slow speed of the pressure of the hydraulic oil.

8. The torsion spring expansion drum type slow clutch according to claim one, wherein the inner wall of the output spring friction sleeve (1) is provided with a friction sleeve friction groove (11) to increase the friction resistance of the spiral torsion spring (4) and the output spring friction sleeve (1). The number of the friction grooves (11) of the friction sleeve is smaller on the power output side than on the power input side, and the friction resistance between the spiral torsion spring (4) on the power output side and the friction sleeve (1) of the output spring is larger than the friction resistance between the spiral torsion spring (4) on the power input side and the friction sleeve (1) of the output spring. The friction sleeve friction grooves (11) are arranged in a sparse and dense mode, and the spiral torsion spring (4) is driven to rebound by load reaction torque conveniently.

9. The torsion spring expansion drum retarder clutch according to the sixth and eighth claims, the power take-off side output spring friction sleeve (1) is frictionally connected with the spring, and the power input side input torsion disc (6) is hard-wired with the right side of the helical torsion spring (4). On the power output side, the direction of the torsional force of a power source connected with an input torsion disc (6) connected with the power input side is opposite to the direction of the torsional force of a load connected with an output end spring friction sleeve (1), and the direction of negative reactive torque is the rebound direction of a spiral torsion spring (4). Meanwhile, on the power output side, because the multi-plate clutch (5) is additionally arranged, the friction groove (11) of the friction sleeve is denser on the power output side than the power input side, and the resilience force capable of enabling the spiral torsion spring (4) to contract is mainly concentrated on the power output side. The hydraulically controlled disc type torsion oil cylinder (8) can generate torsion force of the spiral torsion spring (4), the torsion force is applied to the power output side of the spiral torsion spring (4) through the power output side of the spring bushing (2), and the spiral torsion spring (4) expands outwards and generates certain friction force. The arrangement is convenient for the load reaction torque to cause the spiral torsion spring (4) to rebound, a structure that the load torque and the power source are opposite to each other through the torsion forces of the input torsion disc (6), the disc type torsion oil cylinder (8) and the spring bush (2) is formed, the torsion forces added to the two ends of the spiral torsion spring (4) are equivalent to the forward torsion force of the spiral torsion spring (4) generated by the disc type torsion oil cylinder (8) controlled by hydraulic pressure, and the superposition force of the reverse resilience force of the power output side of the spiral torsion spring (4).

10. A torsion spring expansion drum retarder clutch according to claim one, which, when the reaction torque applied to the output spring friction sleeve (1) by the load is larger than the torsion force applied to the spring bushing (2) by the input torsion disc (6) through the disc torsion cylinder (8), the output spring friction sleeve (1) drives the spring bushing (2) to be twisted towards the rebound direction of the spiral torsion spring (4) through the multi-plate clutch (5) and the spiral torsion spring (4), the disc type torsion oil cylinder (8) can not completely resist the torsion force, the outward expansion torsion force of the spiral torsion spring (4) is reduced, the friction resistance between the spiral torsion spring (4) and the output spring friction sleeve (1) is reduced until the friction resistance between the spiral torsion spring (4) and the output spring friction sleeve (1), and the torque generated between the spring bushing (2) and the input torsion disc (6) is relatively balanced with the torque generated by the hydraulic oil to the disc type torsion oil cylinder (8). The hydraulic oil pressure in the disc type torsion oil cylinder (8) is controlled in a slow speed mode, so that the output torque of the output spring friction sleeve (1) can be controlled in a slow speed mode.