JPH07109223B2 - Brake system for light vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for a light vehicle such as a wheelchair, a bicycle or a trolley, and more particularly, to a cylindrical brake drum integrated with a wheel and a wheel brake by pressing the brake drum. The present invention relates to an improvement of a brake device for a light vehicle having a brake member that brakes rotation.

[0002]

2. Description of the Related Art Conventionally, various brake devices for braking the rotation of wheels in light vehicles such as wheelchairs, bicycles, and carts have been proposed. Among them, a cylindrical brake drum is integrated with the wheels. There is a so-called drum-type brake device in which the brake member is pressed against the outer peripheral surface of the brake drum to generate a frictional force to brake the rotation of the wheels. Since this type of brake device does not require a large braking force, it is generally a simple structure having a belt-shaped brake member. That is, for example, as shown in FIGS. 5 and 6, a belt-shaped brake member is disposed so as to surround the outer peripheral surface of the brake drum, and one end of the brake member is supported by a brake cover integrated into the light vehicle body, The other end
In general, the structure is such that a brake wire is connected to a brake operating means for operating the brake device, and when the brake device is operated, one end of the brake member is pulled by the brake operating means to press the brake drum. There was.

[0003]

However, in the conventional brake device, generally, as shown in FIG. 5, the brake member has a contact member formed of stainless steel, skin or the like that contacts the brake drum. , A connecting member which is formed separately from the connecting member and which is connected to the brake operating means, and in the manufacturing thereof, a step of forming the connecting member and a step of integrating the contact member and the connecting member with rivets or the like. Therefore, it was not possible to mass-produce inexpensively.

Further, when repairing a light vehicle or performing maintenance such as replacement of a brake member, the position of the brake member in a narrow space inside the brake cover for supporting one end of the belt-like brake member on the brake cover, for example. There is also a problem that the work is very complicated and troublesome because it is necessary to make adjustments and to eliminate the bending of the brake member that is bent due to its own weight in order to insert the brake drum inside the brake member. It was. In particular, when this brake device is adopted in a light vehicle such as a wheelchair, the person using the light vehicle is a physically handicapped person, a sick person, etc.
It is necessary to further simplify maintenance and other work. This is because the user himself / herself may perform the work such as maintenance, but at this time, even a simple work for an ordinary person may be a very difficult work for a physically handicapped person. is there.

Further, even when a normal light vehicle is operated without operating the brake device, the belt-shaped brake member bends due to its own weight and comes into contact with the brake drum, and the wheels do not rotate smoothly, which hinders the operation of the light vehicle. In some cases, the brakes were worn out, and the brake members became worn, which necessitated frequent replacement.

The present invention has been made in order to solve such a problem, and an object thereof is to make it possible to mass-produce the brake member at a low cost, and further,
An object of the present invention is to provide a brake system for a light vehicle with a simple structure, which not only simplifies work such as repair and maintenance but also does not cause any trouble during normal operation of the light vehicle.

[0007]

The means adopted by the present invention for solving the above problems will be described with reference to the reference numerals used in the drawings. "A cylindrical brake drum integrated with a wheel 10 will be described. 24 and a brake member 21 for braking the rotation of the wheel 10 by pressing the brake drum 24.
In the brake device 20 of the light vehicle 50 having the above, the brake member 21 is made of synthetic resin having elasticity.
It is integrally formed in a C shape and its inner peripheral surface 23
The outer peripheral surface 26 of the brake drum 24 is surrounded.
Fix it to the body 30 of the light vehicle at about the middle part.
In addition to providing the connecting portions 22 on both ends of the brake member 21,
The brake wire skin 41 and the wire are connected to one connecting portion 22.
The outside of the brake operating means 40 including the main body 42
The skin 41 is connected, and the brake operation is performed on the other connecting portion 22.
The wire main body 42 of the means 40 is connected to the brake unit.
Between the connecting portions 22 of the material 21, both of the brake members 21
The brake device for a light vehicle is characterized in that a compression spring 43 for urging the end is opened .

[0008]

The light vehicle 50 of the present invention having the above-described structure.
The braking device 20 of the above operates as follows.

First, the brake member 21 in the brake device 20 of the light vehicle 50 of the present invention is the brake operating means 40.
Since it has a connecting portion 22 for connecting with, and the whole is integrally formed of synthetic resin, the step of forming a separate connecting member as in the conventional case in the manufacturing thereof, and the contact member and the connecting member are performed. There is no need for the step of integration. For this reason,
The brake member 21 is inexpensive and can be mass-produced.

Further, the brake member 21 is formed in a substantially C shape, and the inner peripheral surface 23 thereof is supported at a position surrounding the outer peripheral surface 26 of the brake drum 24. Therefore, the brake drum 24 can be easily inserted inside the brake member 21 at the time of repairing the light vehicle 50 or maintenance for replacing the brake member 21. That is, the work such as repair and maintenance becomes very easy.

Furthermore, since the entire brake member 21 is integrally formed of elastic synthetic resin, the brake member 21 pressed against the outer peripheral surface 26 of the brake drum 24 when the brake device 20 is operated is Two
In the non-actuated state of 0, the elasticity of the brake drum 24 restores itself and the brake drum 24 is separated from the outer peripheral surface 26. For this reason,
The brake member 21 does not come into contact with the brake drum 24 during normal operation of the light vehicle 50, and no trouble is caused. Furthermore, the brake part
The material 21 is fixed to the light vehicle body 30 at a substantially middle portion.
There is a brake operation on each connecting part 22 at both ends.
The outer cover 41 and the wire of the brake wire forming the means 40.
The main body 42 and the main body 42.
A method of expanding both ends of the brake member 21 between the joints 22.
A compression spring 43 that biases in the direction is provided. others
Therefore, when the brake device 20 is not operating, the brake
The inner peripheral surface 23 of the member 21 is the outer peripheral surface 2 of the brake drum 24.
6 will be released more reliably from the light vehicle 5
In normal operation of 0, unnecessary load or break
It is possible to securely prevent unnecessary wear of the key member 21.
Becomes

[0012]

[Embodiment] Next, a brake device 2 for a light vehicle 50 of the present invention.
0 embodiment will be described in detail with reference to the drawings.

FIG. 1 shows an example in which the brake device 20 of the light vehicle 50 of the present invention is applied to a wheelchair as the light vehicle 50. In the light vehicle 50, the light vehicle body 30
On the other hand, the wheel 10 can be easily attached and detached,
The braking device 20 is wholly integrated with the wheel 10.

Here, as shown in FIG. 2, the brake member 21 of the brake device 20 is provided with connecting portions 22 connected to the brake operating means 40 at both ends thereof, and as a whole,
It is integrally formed into a substantially C shape by a nylon-based synthetic resin having elasticity and excellent in moldability and rigidity. In this embodiment, in order to improve wear resistance and improve durability, the synthetic resin contains glass fiber to form the brake member 21. Further, the invention is not limited to this. For example, when the brake member 21 is integrally injection-molded with a synthetic resin, a brake material made of, for example, stainless steel may be formed integrally with a portion contacting the brake drum 24. Good.

On the other hand, the brake drum 24 is integrally formed with the wheel 11 of the wheel 10 by a synthetic resin, and the outer peripheral surface 26 of the brake drum 24 is directly contacted with the brake member 21 by abrasion and is worn. In order to prevent this, the drum surface material 25 made of stainless steel is integrated.

The inner peripheral surface 23 of the brake member 21 integrally formed of synthetic resin as described above has an outer peripheral surface of the drum surface member 25 of the brake drum 24, as shown in FIGS. 3 and 4. It is supported in a position surrounding 26. Here, in the present embodiment, the braking device 20
The whole is integrated with the wheel 10, and when the wheel 10 is attached to and detached from the light vehicle body 30, the entire brake device 20 can be attached and detached together with the wheel 10. For this reason, the brake member 21 is fixed to the brake cover 27 of the brake device 20 by bolts at its intermediate portion.
Note that, for example, the entire brake device 20 is not integrated with the wheel 10, but, for example, the brake cover 27 and the brake member 21.
When the brake device 20 can be disassembled when the wheels 10 are removed from the light vehicle main body 30, the brake cover 27 and the light vehicle main body 30 integrated with the light vehicle main body 30 can be used. Brake member 21
May be fixed . That is, the brake member is
It may be fixed to the main body of the light vehicle at the intermediate portion.

[0017] The connecting portion 2 at both ends of the brake member 21
2 is provided, one of which is the outer cover 4 of the brake wire as the brake operating means 40 for operating the brake device 20.
1, and the other is connected to the wire body 42. When the brake device 20 is operated, if the wire body 42 is pulled with respect to the outer cover 41 of the brake wire, the brake member 21 bends, and the inner peripheral surface 23 of the brake member 21 presses the outer peripheral surface 26 of the brake drum 24. to Nodea Ru.

[0018] is et al., The brake member 21 is formed of a synthetic resin having elasticity, so the brake member 21 during normal operation of the light vehicles 50 is disengaged from the brake drum 24 and restored by its elasticity the case, so that the brake member 21 can be more reliably separated from the brake drum 24, the compression spring 4 between the connecting portion 22 of the brake member 21
3 is provided.

[0019]

As described above in detail, in the brake system for a light vehicle of the present invention, since the entire brake member is integrally formed of a synthetic resin having elasticity, when the brake member is manufactured, It is possible to omit the conventional step of forming the connecting portion, the step of integrating the contact member and the connecting member, and the like, and moreover, the brake member and the brake drum contact each other during the normal operation of the light vehicle. Can be prevented. The brake member is formed in a substantially C shape, and the inner peripheral surface of the brake member is supported at a position surrounding the outer peripheral surface of the brake drum. The brake drum can be easily inserted. Also the break
The key member is fixed to the main body of the light vehicle at its approximately middle portion.
The connecting parts at both ends of the brake member are
The outer surface of the brake wire of the operating means and the wire body
Are connected to each other.
A compression spring is installed to urge both ends of the
Therefore, when the brake device is inactive,
Check the inner peripheral surface of the brake member from the outer peripheral surface of the brake drum.
You can really get rid of it.

Therefore, according to the brake device for a light vehicle of the present invention, not only the brake member can be mass-produced at low cost, but also the work such as repair and maintenance can be simplified, and the brake device can be lightened. It is possible to prevent any trouble during normal driving of the vehicle.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a light vehicle adopting a brake system for a light vehicle of the present invention.

FIG. 2 is a cross-sectional view showing an example of a brake member in the brake system for a light vehicle of the present invention.

FIG. 3 is a partial side view showing an embodiment of a brake system for a light vehicle of the present invention.

4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 is a partial perspective view showing a conventional brake device.

FIG. 6 is a partial side view showing a conventional brake device.

[Explanation of symbols]

10 Wheels 11 Wheels 20 Brake Device 21 Brake Member 22 Connecting Part 23 Inner Circumferential Surface 24 Brake Drum 25 Drum Surface Material 26 Outer Surface 27 Brake Cover 30 Light Vehicle Body 40 Brake Operating Means 41 Outer Skin 42 Wire Body 43 Compression Spring 50 Light Vehicle

Claims (1)

[Claims] 1. A brake system for a light vehicle, comprising: a cylindrical brake drum integrated with a wheel; and a brake member for braking the rotation of the wheel by pressing the brake drum, wherein the brake member is elastic. C with a synthetic resin containing
It is integrally formed in a letter shape, and its inner peripheral surface is
-Enclose the outer peripheral surface of the
Fixed to the main body of the light vehicle and provided with connecting parts at both ends of the brake member,
At the connecting part of the
Connecting the outer skin of the brake operating means, and
Connect the wire body of the brake operating means to the joint
And, between the respective connection portions of the brake member, both ends of the brake member
A brake device for a light vehicle, characterized in that a compression spring for urging the vehicle is provided .