JPH0511382Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disc brake device used for disc brakes of vehicles and the like.

[Conventional technology]

For example, as shown in Japanese Patent Laid-Open No. 60-53228, this type of brake pad includes a pair of brake pads that are placed opposite to a disc rotor, and a brake pad that guides and supports the pair of brake pads and is placed astride the disc rotor. a cylinder device which is integrated with the frame by a stopper and which presses one brake pad with a piston and the other brake pad against a disc rotor via the frame;
A guide device is provided between the cylinder device and the non-rotating part of the vehicle body and guides the movement of the cylinder device, and a guide device is provided between the pair of brake pads and the guide portion of the frame and can be removed from the side opposite to the cylinder device side. A key member disposed on the frame that allows the brake pad to be removed from the frame when removed, an engaging portion provided on the cylinder device side of the key member, and a retainer disposed to engage with the engaging portion. In this device, the key member is prevented from falling off by engaging the retainer with both the key member and the engaging portion, and conversely, when the retainer is removed, the key member is separated from the cylinder device. It is now possible to pull it out to the opposite side, and in this state the brake pad can be removed from the frame, making it easy to replace the brake pad.

[The problem that the idea aims to solve]

In this conventional type, the retainer has a loop-shaped split pin shape and is elastically fitted into the small hole that is the engaging part of the key member, so the attachment and detachment of the retainer itself is difficult. This is not only complicated, but also has the problem of being lost when replacing the brake pads.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a disc brake device equipped with a retainer that improves workability when replacing brake pads.

[Means to solve the problem]

In the present invention, the retainer has one end fixed by the stopper and the other end engaged with the engaging portion.

[Effect]

According to the present invention, one end of the retainer is fixed by a stopper that integrates the frame and the cylinder device, and the other end engages with the engaging portion of the key member, so that the key member When the brake pads are not being replaced, they are sufficiently prevented from coming off by the stopper with a stopper in between, and when replacing the brake pads, the key member can be removed by disengaging the other end of the stopper from the engaging part of the key member. can be removed and the brake pads can be replaced.

〔Example〕

FIG. 1 is a plan view of a disc brake device that is an embodiment of the present invention.

In the figure, the disc brake device is indicated as a whole by 1, and the device 1 is constructed by integrating a cylinder device 2 and a frame 3 with pentagonal bolts 4 and 5.

The movement of the cylinder device 2 is guided by cylindrical pins (not shown) fixed by bolts 6, 7 attached to the vehicle body (not shown). 7 and are slidably pushed through a pair of holes formed in the cylinder device 2 respectively. A pressure chamber is defined by the inserted piston 10, and the pressure chamber is connected to a brake master cylinder (not shown) through a piping connection 11. Reference numeral 12 denotes a screw hole for a bleeder for venting air from the pressure chamber.

The frame 3 has a U-shape that straddles a rotor that rotates together with wheels (not shown), and has pad guide portions 13 and 14 extending in the axial direction of the rotor. The ends of the pad plates 17, 18 of the brake pads 19, 20 formed by integrating the pad plates 17, 18 are directly slidably engaged, and the other guide portion 14 is provided with a key member 21 interposed between the ends of the brake pads 19, 20. The other ends of pad plates 17 and 18 are slidably engaged. Although not shown, the portions of the pad plates 17 and 18 facing the guide portions 13 and 14 are shaped like a cone, corresponding to the shape of the guide portions 13 and 14 toward the center of the figure. When one of the ends of each pad plate 17, 18 is brought into close contact with one of the guide parts 13 or 14, if the key member 21 is not present, it can be removed from the frame 3 (removed in the vertical direction of the page). ).

Pad springs 22 and 23 are stretched between the brake pads 19 and 20 and the guide portion 13, respectively.
It is installed without any play between it and 3 and 14.

The key member 21 has a total length longer than the length of each guide portion 13, 14, and has a total length longer than the length of each guide portion 13, 14.
It has a shape that matches both the conical recess and the conical protrusion of the guide parts 13 and 14 (for example, a F-shaped cross section),
Small holes 21a and 21b are formed at both ends as engaging portions. The key member 21 is connected to the guide portion 13 or 14 in the direction from the right to the left in the figure.
Relief portions 24 and 25 are formed on the opposite side of the guide portions 13 and 14 of the frame 3 from the cylinder device 2 to allow the key member 21 to be inserted thereinto.

The above explanation is basically the same as that of Japanese Patent Application Laid-Open No. 60-53228 which shows the prior art described above.

Hereinafter, the main parts corresponding to the characteristic parts of the present invention will be explained with reference to FIG.

In this embodiment, the retainer 30 includes a small-diameter annular portion 33 that is tightened and fixed together with the mounting portion 32 of the frame 3 between the seat surface of the bolt 5 and the main body 31 of the cylinder device 2, and a head portion of the bolt 5. It has a large-diameter annular portion 34 that fits loosely around the periphery, and a partially formed loop portion 35 that connects both the annular portions 33 and 34, and is formed by press molding the whole, In particular, the loop portion 35 provides elasticity so that both the annular portions 33 and 34 can be displaced relative to each other. Also,
The large diameter annular portion 34 has a small hole 21a of the key member,
A protrusion 36 is formed to fit into 21b.

This retainer 30 is used when tightening the bolt 5 in advance.
The large diameter annular portion 3 is positioned and fixed at a predetermined position, that is, a position where the projection 36 can fit into the small hole 21a when the key member 21 is inserted.
By pressing 4, the key member 21 and the protrusion can be deformed so as not to interfere with each other,
The length of the protrusion 36 is set such that it disengages from the small hole 21a only when the large-diameter annular portion 34 is pushed in sufficiently.

The operation of such a disc brake device 1 is similar to that of the conventional one. When pressure is supplied from the master cylinder to the pressure chamber of the cylinder device 2, the piston 10 presses one brake pad 20 directly toward the rotor, and the cylinder The main body 31 and frame 3 of the device 2 press the other brake pad 19 toward the rotor.

Next, the replacement work of the brake pads 19 and 20 will be explained.

First, when removing the brake pads 19, 20, push the annular portion 34 of the retainer 30 sufficiently to remove the protrusion 36 from the small hole 21a, and in this state, remove the key member 21 to the right in the figure. Next, each brake pad 19, 20 may be pulled out in a direction perpendicular to the plane of the paper.

Next, when attaching the brake pads 19 and 20, the pad springs 22 and 23 are attached and the brake pads 19 and 20 are assembled into the frame 3.
Next, insert the key member 21 from the right to the left in the figure, and press the annular part 34 of the retainer 30 sufficiently just before reaching the predetermined position between each brake pad 19, 20 and the guide part 14. , key member 2
1 into the specified position. After that, the annular portion 34
When the pushing is stopped, the projection 36 of the annular portion 34 fits into the small hole 21a due to the elastic deformation of the loop portion 35.

In this way, the brake pads 19, 20 are attached and detached.

According to these embodiments, the following effects can be achieved.

Since the retainer 30 is fixed to the bolt 5, it will not be lost during replacement work.

The engagement between the retainer 30 and the key member 21 can be released by pressing the annular portion 34 of the retainer 30, resulting in good workability.

The key member 21 is normally provided on the guide portion 14 on the side that does not receive the brake reaction force when the brake is applied during forward movement, but in a disc brake device for both left and right wheels, the key member 21 itself is The key member 21 can be attached to either of the guide parts 13 and 14, and therefore there is a possibility that the key member 21 is attached incorrectly. You can prevent mistakes.

[Effect of idea]

According to the present invention, it is only necessary to disengage the retainer from the engaging part of the key member, and there is no need to separate it from the key member as in the past, making the work easier and removing the retainer. Since it is fixed with a stopper, it is reliably prevented from being lost. In addition, because the retainer is fixed,
There is no possibility of inserting the key member into the wrong place, and even if key members made for both right and left wheels are used, work can be carried out reliably.

[Brief explanation of the drawing]

1 and 2 are views showing one embodiment of the present invention, with FIG. 1 being a plan view and FIG. 2 being a front sectional view of the main parts. 1... Disc brake device, 5... Bolt,
21...Key member, 21a...Small hole, 30...Removal stopper, 36...Protrusion.

Claims (1)

[Scope of utility model registration request] A pair of brake pads are arranged facing the disc rotor, a frame is arranged to guide and support the pair of brake pads and straddle the disc rotor, and the frame and the stopper are integrated, and one brake pad is connected to the other by a piston. A cylinder device that presses the brake pads against the disc rotor through the frame, a guide device that is provided between the cylinder device and a non-rotating part of the vehicle body and guides the movement of the cylinder device, and a guide portion of the pair of brake pads and the frame. A key member which is removably disposed facing the side opposite to the cylinder device side in between and allows the brake pad to be removed from the frame when removed; an engaging portion of the key member provided on the cylinder device side; A disc brake device having a retainer disposed in engagement with each other, wherein one end of the retainer is fixed by the stopper and the other end engages with the engaging portion.