JPH0587705B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reversing torque converter used for industrial construction machines or passenger cars.

(Prior Art) Torque converters generally employed for industrial construction machines or passenger cars include an annular torque converter main body, the outer periphery of which is comprised of an impeller pump and a turbine. Further, the inner peripheral portion of the torque converter main body is constituted by a stator, and torque conversion is performed by this stator.

(Problem to be Solved by the Invention) However, there is no structure for use in industrial construction machines or passenger cars in which the outer peripheral part of the torque converter body is composed of a stator and the inner peripheral part is composed of an impeller pump and a turbine. There is also no structure with a damper.

The present invention adopts a structure in which the outer peripheral part of the torque converter is composed of a stator, the inner peripheral part is composed of an impeller pump and a turbine, and is further equipped with a lock-up damper, which is lightweight and easy to manufacture. The purpose is to provide a converter.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an impeller pump and a turbine that constitute an inner peripheral portion of an annular torque converter main body, and a stator that constitutes an outer peripheral portion of the torque converter main body. , a reversing torque converter comprising a cylindrical front cover connected to an impeller pump to constitute an input section, and a lock-up damper disposed between the front end wall of the front cover and the turbine, the lock-up damper as described above. includes an output member connected to the turbine, an input member pressed against the inner surface of the front end wall extending in the radial direction of the front cover, and a damper spring connecting the input member and the output member in the circumferential direction, the output member The damper spring is characterized in that it is formed by a claw portion that is bent from the radially outer circumferential end of the turbine shell constituting the outer shell of the turbine toward the lock-up damper, and extends integrally with the end surface of the damper spring to engage with the end surface of the damper spring.

(Operation) The damper spring elastically transmits the rotational force transmitted to the input section to the claw section.

(Embodiment) In FIG. 1 showing an embodiment of the present invention, the left side of the figure (the side opposite to the transmission not shown) is assumed to be the front.

In FIG. 1, a torque converter main body 10 of the present invention is formed in an annular shape, and its outer circumference is
It is composed of a stator 11.

The inner peripheral rear portion of the torque converter main body 10 is constituted by an impeller pump 12 .
Further, the inner peripheral front portion of the torque converter main body 10 is constituted by a turbine 13.

Reference numeral 14 denotes a cylindrical front cover, the front end of which is connected to a crankshaft (not shown) to constitute an input section of the torque converter.

The front cover 14 includes an end wall portion 15 extending in the radial direction, a cylindrical peripheral wall portion 16 extending rearward from the outer peripheral end of the end wall portion 15, and a connecting portion 17 extending from the rear end of the peripheral wall portion 16 toward the center. The connecting portion 17 is fixed to the outer shell of the impeller pump 12 to transmit rotational force from the engine to the impeller pump 12.

End wall portion 15 of front cover 14 and turbine 1
3 is an annular lock-up damper 20.
is located.

The lock-up damper 20 includes a generally annular and plate-shaped piston 21 and a plurality of coil springs 22 (damper springs: only one is shown in FIG. 1) arranged at intervals in the cylindrical direction. There is.

In order to connect the coil spring 22 and the piston 21, a portion near the outer periphery of the back surface of the piston 21 has a
A retaining plate 23 is fixed with rivets 28. The retaining plate 23 is a plate-like member having a plurality of bending claws 24 to 27, and is formed into a ring shape that generally extends in the circumferential direction of the torque converter main body 10. The claws 24 and 25 are bent from the outside and the inside in the radial direction to embrace the coil spring 22, respectively. Moreover, the claws 26 and 27 are
The coil springs 22 are respectively bent from the outside and inside in the radial direction and engaged with the adjacent coil springs 22 in the circumferential direction.

Reference numeral 30 denotes a turbine shell constituting the outer shell of the turbine, which is integrally formed by, for example, press working. A plurality of claws 31 (only one is shown in FIG. 1) are provided at the radially outer end of the turbine shell 30.
are punched out in one piece. The claw portions 31 are inserted between the coil springs 22 adjacent to each other. The ends of each coil spring 22 engage with the claws 31, thereby causing the piston 21 and the turbine 13 to
are elastically connected in the circumferential direction.

An annular friction lining 33 (input member) is attached to the front surface of the outer circumference of the piston 21 . The friction lining 33 faces the inner surface of the end wall 15 of the front cover 14 and
is moved forward by hydraulic pressure, so that the friction lining 33 comes into pressure contact with the inner surface of the end wall portion 15, and the piston 21 is connected to the front cover 14.

The inner peripheral portion of the turbine shell 30 is fixed to an outer peripheral flange 36 of a hub 35 by a rivet 34. The hub 35 is spline-fitted to an output shaft 37 which is also an input shaft of a transmission (not shown). Note that the outer circumference of the hub 35 rotatably supports the inner circumference of the piston 21.

An outer cylindrical portion 38 that rotates relative to the output shaft 37 is concentrically arranged on the outer periphery of the output shaft 37, and the stator 11 is supported by the outer cylindrical portion 38. Reference numeral 40 denotes a brake of the outer circumferential cylinder portion 38, and the stator 11 is controlled by this brake 40 to be rotatable or non-rotatable.

According to the above configuration, the rotational force on the engine side is transmitted to the impeller pump 12 via the front cover 14, and the hydraulic oil inside the torque converter main body 10 is driven to transmit the rotational force to the stator 11.
When the brake 40 is released and the stator 11 rotates freely, the stator 11 rotates together with the impeller pump 12 and applies rotational force to the turbine 13 in the same direction as the impeller pump 12 (direction R in FIG. 1). The force is transmitted to the output shaft 37.

When the brake 40 is braking the stator 11 so that it cannot rotate, the rotational force of the impeller pump 12 is reversed by the stator 11, and the rotational force in the opposite direction (the opposite R direction in FIG. 1) is applied to the turbine. 13.

During the above operation, when the oil pressure on the rear side of the piston 21 increases and the lock-up damper 20 moves forward, the friction lining 33 comes into contact with the inner surface of the end wall 15, and the rotational force of the front cover 14 is transferred from the friction lining 33. Piston 21, bending claws 26,2
7 to the coil spring 22. The coil spring 22 elastically transfers the rotational force to the claw portion 3.
1, and the force is transmitted from the claw portion 31 to the output shaft 37 via the turbine shell 30, outer peripheral flange 36, and hub 35.

(Effects of the Invention) As explained above, according to the present invention, the impeller pump 12 and the turbine 13 that constitute the inner peripheral portion of the annular torque converter main body 10, and the stator 11 that constitutes the outer peripheral portion of the torque converter main body 10, , a cylindrical front cover 14 that is connected to the impeller pump 12 to constitute an input section;
A lock-up damper 20 disposed between the front end wall 15 of the front cover 14 and the turbine 13
In the reversing torque converter, the lock-up damper 20 has an output member connected to the turbine 13, and an input member that presses against the inner surface of the front end wall (the inner surface of the end wall 15) extending in the radial direction of the front cover 14. (friction lining 33), and a damper spring (coil spring 22) that connects the input member and the output member in the circumferential direction, and the output member is connected to the radius of the turbine shell 30 that constitutes the outer shell of the turbine 13. It is composed of a claw portion 31 that is bent from the outer peripheral end toward the lock-up damper 20 and extends integrally to engage with the end surface of the damper spring (coil spring 22), so that the lock-up damper 20 can be inserted from the front cover 14 through the lock-up damper 20. The rotational force transmitted by the damper spring (coil spring 22) is elastically transmitted to the claw portion 31, and from the claw portion 31 to the output shaft 37. Therefore, there is no need to construct an output member separate from the turbine shell 30, and the mass of the entire device can be reduced accordingly. Moreover, in the present invention, the output member is bent from the radially outer peripheral end of the turbine shell 30 toward the lock-up damper 20 and extends integrally with the damper spring (coil spring 2).
2), the claw portion 31 engages with the end surface of the turbine shell 30.
can be formed simultaneously. Therefore, the number of man-hours can be reduced and manufacturing costs can be lowered.

In short, in the present invention, the claw portion 31 constituting the output member is bent and extends integrally from the radially outer peripheral end of the turbine shell 30 constituting the outer shell of the turbine 13 toward the lock-up damper 20. , the claw portion 31 can be formed by integrally punching out the radially outer peripheral end portion of the turbine shell 30 by press working, which improves strength and reduces process and cost. The torque converter body 10 of the present invention has a stator 11 on the outer periphery, an impeller pump 12 on the rear of the inner periphery, and a turbine 13 on the front of the inner periphery. radially closer to the The lock-up damper 20 is directly connected during lock-up, but since the power connection portion is located at a small radius, the inertial force is small and the shock is small (due to the arrangement of the turbine 13 inside and the stator 11 outside).

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the present invention. 10...Torque converter body, 11...Stator, 12...Impeller pump, 13...Turbine, 14...Front cover, 20...Lock-up damper, 22...Coil spring (damper spring), 30...Turbine Ciel, 31...
Claw portion (output member), 33...Friction lining (input member).

Claims (1)

[Claims] 1. An impeller pump and a turbine forming an inner circumferential portion of an annular torque converter main body, a stator forming an outer circumferential portion of the torque converter main body, and a cylindrical front cover connecting with the impeller pump to form an input portion; A reversing torque converter including a lock-up damper disposed between a front end wall of a front cover and a turbine, an output member to which the lock-up damper is connected to the turbine, and a front end wall extending in a radial direction of the front cover. an input member that presses against the inner surface of the part;
A damper spring is provided that connects the input member and the output member in the circumferential direction, and the output member is bent from the radially outer peripheral end of the turbine shell constituting the outer shell of the turbine toward the lock-up damper and integrated. A reversing torque converter comprising a claw portion that extends and engages an end face of a damper spring.