JPS59200824A - Multi-plate type disc brake - Google Patents

Abstract

PURPOSE:To obtain a multi-plate type disc brake having a simple and compact automatic regulating mechanism in which a nut part is screwed on the axis as the center of the shaft so as to move it toward the pressure cam side. CONSTITUTION:A nut part 51 screwed with the threaded portion 11d of a shaft 11 has a body 51a having a spline 51b on its periphery, and a spring holder 52 is screwed with the threaded portion 11d so as to cover the body 51a. In the inside of the spring holder 52, an annular spring guide 55 sprung rotationally by a spring 54 is provided. The inside spline 55a of the spring guide 55 is engaged with the spline 51b and the nut part 51 is screwed so as to move it toward the pressure cam 12 side, whereupon a plate 34 to be pressurized is moved toward the pressure plate 31 side under a fixed pressure all the time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a latch-type multi-plate disc brake particularly suitable for use in three-wheeled motor vehicles, four-wheeled vehicles, and the like.

It is desirable that the brake gear used in automatic vehicles, 3-wheeled vehicles, 4-wheel vehicles, etc. has a simple and concise structure, and furthermore, it is possible to prevent the tire brake gear from rotating regardless of whether the tire plate is worn or not. It is desirable that an automatic adjustment mechanism for maintaining the gap at a constant value be provided inside. To provide a multi-plate disc brake that is simple and compact and equipped with an automatic adjustment mechanism.

To achieve the above object, the present invention provides a first aspect of the present invention, in which a pressurized cam is provided on the axle that rotates when the brake is operated, and a pressurized cam that is fitted onto the axle and moves in the axis of the axle in the 'f9 direction by rotation of the pressure cam. 1"C, and a turret 11 (b) is provided so as to face the pressure plate.
A plurality of rotor plates and stator plates are interposed between the pressure plate and the pressure plate L- to be fitted into the pressure plate L-, thereby constructing the entire multi-plate disc brake mechanism. The second invention is characterized in that an automatic adjustment mechanism is connected to the brake mechanism and includes a nut/member that is threadedly biased around the axis of the axle so as to move toward the cam side.
In addition to the above invention, an automatic adjustment device includes a support shaft whose one end is fitted and supported so as to slide with a constant force, and a spring that is wound around the support shaft and biases the pressure plate and the pressure plate in a direction to separate the pressure plate and the pressure plate. A case will be described in which a preferred embodiment of the present invention, characterized in that a mechanism is provided between the pressure plate and the pressure plate, is applied to the front wheel of a three-wheeled motor vehicle.

FIG. 1 shows a left side view of the three-wheeled motor vehicle, and FIG. 2 shows a sectional view of the brake mechanism.

A head tube 2a is provided at the front end of the body frame 2 of the three-wheeled motor vehicle 1, and a front fork 4 supporting the front wheel 3 is provided.
, 4 is supported by a head tube 2a so that it can be steered freely, a bar handle 5 is provided above the head tube 2a, and the front wheel 3 is used as a rolling wheel. The engine 6 is composed of a main pipe extending rearward from the head tube 2a, a down tube 2b extending diagonally downward from the rear lower part of the head tube 2a, and a down tube lower 20 extending rearward from the lower end of the down tube 2b. It is mounted on a frame 2, and a fuel wheel 7 and a seat 8 are mounted on the vehicle body frame 2, and two drive wheels forming one driving wheel are mounted diagonally below the seat 8.
Two rear wheels 9, 9 are arranged, and in the embodiment, balloon tires are mounted as the front wheels 3 and the rear wheels 9, 9, respectively.
4 is rotatably mounted on an axle 11 whose both ends are fixedly supported.

A cylindrical pressure cam 12 is rotatably fitted to the right end 11a of the vehicle 1tQl+ 11, and a collar 13 is fitted to the left end 11b of the axle 11 with its outer end touching the lower end of the front fork 4. The collar 13 is fitted with a rotation detection sensor.

The middle part of the pressure cam 12 and the collar 13
Bearings 14 and 15 are fitted into the axle 11 at the inner end of the axle, respectively, and a cylindrical hub 16 is provided by fitting both ends of the bearings 14 and 15, and seal members 17 and 16 are provided on both edges of the hub 16, respectively.
18 to seal the inside of the hub 16.

The hub 16 is a divided body consisting of a left half body 16a and a right half body 16b.The central flange portions 16C and 216C of each are connected with bolts 21, and a balloon tire is mounted on the hub.
the inner edge of the rim 22a of the rim 22 and the central flange portion i6c,
1''6C are connected with bolts 23 and 24.24, and toothed portions 16d are formed on the inner circumferential surface of the right half 16b near the center flange portion 16C.

As shown in FIG. 3, the base of an arm 250 is fixed near the outer end of the pressure cam 12, and the tip 26 of a brake cable is tied to the tip of the arm 25, so that the Glensha cam can freely rotate 120 rotations by operating the brake. The arm 25 is urged by the torsion spring 27 so that the pre-shaped cam 12 can be returned freely.

At the inner end of the pressure cam 12, there is a cam surface 12 whose height in the axial direction is gradually varied along the circumferential direction as shown in FIG.
A pressure plate 31 is disposed inside the brake shaker cam 12.

The pressure plate 31 includes a cylindrical body portion 31a and an annular plate portion 31b welded to the inner end of the body portion 31a, and a cam surface 31c corresponding to the cam surface 12a is provided on the outer end surface of the body portion 31a. , and the cam surfaces 12a, 31c
A steel ball 33 is inserted through the support piece 32 between them. A spline 31d is formed on the inner circumferential surface of the body 31a, and the spline 11C formed in the middle of the axle 11 and the spline 31d are (pressure play)
- The rotation of the pressure cam 120 is made impossible, and the cam surfaces L2a and 31c are rotated.

The pressure plate 31 can be freely moved in the axial direction through the steel balls 33.

A pressure plate 34 is disposed on the axle 11 so as to face the pressure plate 31.

The pressurized grate 34 includes a cylindrical body portion 34a and an annular plate portion 3 whose diameter is expanded from the inner end of the body portion 34a.
4b, and a spline 34C on the inner peripheral surface of the body 34a.
and engages the spline 11C of the axle 11 and the spline 34C.
rotation is disabled.

A rotor plate I.36 and a stator plate 3 are connected between the pressure plate 31 and the pressure plate 34.
A plurality of 7 are provided.

The rotor plate 36 has a buried plate shape, and the outer peripheral teeth 36
a is provided to mesh with the negative portion 16d and rotate integrally with the flute hub 16, and the stator plate 37 is provided with an inner toothed portion 37
a is meshed with the spline 11C so as to be non-rotatable;
The rotor plates 36 and stator plates 37 are arranged so as to be alternately overlapped.

The Brera Shakam 12, Pressure Play 1-31,
! A brake mechanism 38 is composed of the pressure plate 34, the rotor plate 1-36, the stake plate 37, and the like.

A support shaft 41 is provided inside the inner periphery of the rotor plate 1 and 36 and between the plate portions 31b and 34b so as to be inserted through the hole 37b of the stator plate 37 and parallel to the axle 11.

The support shaft 41 has a large diameter flange portion 41a in the middle portion.
The small diameter part 41b is provided at the right end, and the small diameter part 41b is loosely fitted into the guide hole 31e drilled in the plate part 31b of the pressure plate 31, and the plate part 34b of the pressure plate 34 has an annular shape like a fitted grommet. The left end shaft portion 41C is inserted into the elastic member 42 of the left end shaft portion 41C.
are fitted and supported by the elastic member 42.

The flange portion 41a of the support shaft 41 and the plate portion 3I
A coil spring 43 is provided between the support shaft 41 and the coil spring 43, and the coil spring 43 moves the pressure plates 1 and 31 outward to prevent the pressure plates 31 from automatically moving after the pressure plate 1 and 31 are released. You can return freely.

As shown in FIG. 5, the coil spring 43 has a width of approximately 1 mm in the embodiment when the distance S between the step portion 41d formed on the base side of the small diameter portion 41b and the plate portion 31b reaches a predetermined value. It is formed so that it has a free length when it becomes . However, the left end shaft portion 41C and the elastic member 42 are engaged only when the pressure plate 31 moves toward the pressure plate 34 side due to brake operation and the plate portion 31b abuts against the stepped portion 41d to move the support shaft 41 to the left. Left end shaft part 4
1c is fitted to slide within the elastic member 42.

The support shaft 41, the elastic member 42, the coil spring 43, etc. constitute a second automatic adjustment mechanism 44. A threaded portion 11d is formed at the axle 11 portion on the left end side of the body portion 34a of the pressure plate 34. The nut member 51 is screwed into the threaded portion 11d. The nut member 51 has a body portion 51a extending outward to the left.
A spline 51b is formed on the outer peripheral surface of the body portion 51a.

A spring holder 52 is screwed onto the threaded portion 11d so as to cover the body portion 51a, and the spring holder 52 is tightened with a lock nut 53 to position and fix the spring holder 52.
An annular spring guide 55 rotatably biased by
is engaged with the spline 51b, and the spring 54 is engaged with the spline 51b.
, the nut member 51 is helically biased by the spring guide 55 to move toward the pressure plates 1 and 34, and the pressure target plate 34 is always biased toward the pressure plate 31 side with a constant pressure.○ The nut member 51 and the spring The holder 52, spring 54, spring guide 55, etc. constitute the first automatic adjustment mechanism 56. In the drawing, 61 is a meter cable, and 62 is a meter.

Since the present invention is configured as described above, when the brake lever or the like is operated, the pressure cam 12 rotates via the brake cable and the arm 25, and the cam surfaces 12a, 31C rotate.
1 steel ball 33, the pressure plate 31 moves toward the pressure plate 34 side against the elastic force of the spring 430, and the rotor plate 3 is moved by both plate portions 31b and 34b.
6. ... and stator plate 37.・Pinch and brake the front wheels 3.

Next, when the brake operation is released, the torsion spring 27
As a result, the arm 25 and the pressure cam 12 rotate and return to their original states, and the pressure plate 31 is moved by the spring 4.
Step 3: Move outward to the right and return to the original state.

Next, the operation of the first automatic adjustment mechanism 56 and the second automatic adjustment mechanism 44 when the rotor plate 36, stator grating 37, etc. are worn out will be explained. move to the side, both plate portions 31b,
34b and rotor plate 36. ...and stator plate 37. Suppose that the total thickness of the rotor plate 36 and stator plate 37 has been reduced by t4.

As shown in FIG.
Although a gap S is secured between the plate part 1d and the plate part 31b, when the brake is operated,
Due to the movement of the plate portion 31b comes into contact with the step portion 41d,
The support shaft 41 is moved between the pressure plates 34 by tK%, and the left end shaft portion 41C is shifted to the left within the elastic member 42, and the rotor plate 1-36 and stator plate 37 are sandwiched between the plate portions 31b and 34b. The front wheels 3 are braked.

Next, when the brake operation is released, the pressure plate 31 is moved by the pressure cam 1 due to the elastic force of the spring 43.
The pressure plate 12 stops moving toward the pressure cam 12 side when the gap between the stepped portion 41d and the plate portion 31b becomes S, and the pressure plate 12 stops moving toward the pressure cam 12 side. rotor plate 36. - and stator plate 37.・
The mutual gap between the two is always maintained at a constant value by the operation of the second automatic adjustment mechanism 44, regardless of wear.

Next, when the gap between the stepped portion 41d and the plate portion 31b becomes S, the return movement of the brake plate 31 by the spring 43 is stopped, but the pressure plate 31 is moved back to its original state by tl on the side of the pressure plate 34. As a result, a gap of t is created between the cam surfaces 12a, 31c and the steel ball 33, and the nut member 51 is screwed and moved toward the pressure cam 12 by the action of the spring 54 to close the gap. , pressure plate 34,
The entire rotor plate 36, stator plate 37, pressure plate 31, support shaft 41, etc. is assembled into a pressure cam 1.
Move to the 2nd side by t1.

Therefore, even if wear occurs on the rotor plate 36, stator plate 37, etc., the operation of the first automatic adjustment mechanism 56 prevents gaps from forming between the pressure plate 31 and the pressure cam 12, etc., and the stroke of the brake lever etc. can be maintained constant.

In the embodiment, the second automatic adjustment mechanism 44 is provided together with the first automatic adjustment mechanism 56, but the pressure plate 31
If a spring is provided to separate the pressure plate 34 by a predetermined distance, even a section not provided with the second automatic adjustment mechanism 44 can brake the front wheels 3 regardless of the degree of wear of the rotor plate 36, etc. This is a passionate argument.

Therefore, according to the present invention, since the brake mechanism 38 and the first automatic adjustment mechanism 56 are provided using the axle 11, the brake mechanism 38 and the first automatic adjustment mechanism 56 are installed inside the wheel rim 22a and on both front forks 4, 4. It can be placed between the brake mechanism 38, the first automatic adjustment mechanism 56, and the second automatic adjustment mechanism. By covering the mechanism 44 with the hub 16, dust and the like can be prevented from entering and the durability of each mechanism can be increased. In addition, the first automatic adjustment mechanism 5
The brake adjustment can be performed reliably and automatically by the operation of the second automatic adjustment mechanism 44, and the gap between the rotor plate 36 and the stator plate 37 is maintained constant by the operation of the second automatic adjustment mechanism 44, which eliminates the need for brake adjustment, which is advantageous in terms of maintenance. Become.

As is clear from the above description, according to the present invention, the brake mechanism and automatic adjustment mechanism are made more compact, and maintainability is improved by eliminating the need for brake adjustment. Since the mechanism is provided, excellent effects such as a reduction in the number of parts and further compactness can be achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a left side view of a three-wheeled motor vehicle, Fig. 2 is a sectional view of the brake mechanism, and Fig. 3 is a sectional view taken along line III-I [1] of Fig. 2. , FIG. 4 is an enlarged view of the main part of the pressure cam, and FIG. 5 is an enlarged view of the second automatic adjustment mechanism. In the drawing, 11 is an axle, 12 is a pressure cam, 31 is a pressure plate, 34 is a pressure plate, 36
is a rotor plate, 37 is a stator plate, 38 is a brake mechanism, 41 is a support shaft, 44 is a second automatic adjustment mechanism, 5
1 is a nut member, and 56 is a first automatic adjustment mechanism. Figure 5Figure 4

Claims (2)

[Claims] (1) A pressure cam that is fitted to the axle and rotates when the brake is operated is provided, and a pressure grate that is fitted to the axle and moves in the axial direction of the axle due to rotation of the pressure cam is provided, and is opposed to the pressure plate. A pressure plate is provided which is fitted to the axle so as to provide a pressure plate, and a plurality of rotor plates and stator plates are interposed between the brake brake plate 1 and the pressure plate to constitute a multi-plate disc brake mechanism. A multi-plate disc brake, characterized in that an automatic adjustment mechanism is connected to the brake mechanism and includes a nut member that is threadedly biased about the axis of the axle so as to move toward the cam side. (2) A pressure cam that is fitted to the axle and rotates when the brake is operated is provided, and a pressure plate that is fitted to the axle and moves in the axial direction of the axle due to the rotation of the pressure cam is provided, and the pressure plate is opposed to the pressure cam. A pressure plate is provided which fits onto the axle so as to provide a pressure plate, and a plurality of rotor plates and stator plates are interposed between the pressure plate and the pressure plate V-) to constitute a multi-plate disc brake mechanism, and the pressure plate A first automatic adjustment mechanism including a nut member screwed about the axis of the axle so as to move toward the cam side is connected to the brake mechanism, and one end is fitted and supported so as to slide with a constant force. A second automatic adjustment mechanism is provided between the pressure plate and the pressure plate, the second automatic adjustment mechanism having a support shaft and a spring that is wound around the support shaft and biases the pressure plate and the pressure plate 1 in a direction to separate the pressure plate and the pressure plate. A multi-disc brake featuring this feature.