JPH01240355A - Car brake gear - Google Patents

Abstract

PURPOSE: To absorb slackening of a cable by providing a link adjusting mechanism including a conduit anchoring device for gripping and releasing a conduit of the cable in a system where a braking device is operated through a cable and a mechanical link mechanism. CONSTITUTION: A braking system 2 including a wheel braking device 6 attached to a rear wheel 8 operates the wheel braking device 6 through a cable 12 and a mechanical link mechanism 10 by operation of a manual brake 4. In the system, a linkage adjusting mechanism 14 comprises a movable conduit anchoring device 22 capable of moving from a first position not anchoring a conduit 18 of the cable 12 to a second position for anchoring the conduit 18, and an energizing means 24 for applying tension to an inner member 16 of the cable 12. The conduit anchoring device 22 is so constructed that when conical complementary form parts 30, 32 are engaged, a tooth-form part 26 engages with a projection 28 of the outer periphery of the conduit 18, thereby anchoring the conduit 18.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a brake device for a vehicle.

[Prior Art and Problems to be Solved by the Invention] Brake systems for vehicles equipped with mechanical linkages are well known. The mechanical linkage normally extends between the brake actuating member and the wheel braking device that performs the braking action on the wheels. The known mechanical linkages described above are not always satisfactory because they usually do not provide any means for automatically adjusting the slack of the entire mechanical linkage. This is because it is inconvenient and expensive to make adjustments at the time of vehicle manufacture and further to make readjustments at appropriate intervals during vehicle operation. Of course, there is a well-known mechanism that automatically adjusts the slack of the entire mechanical linkage, but it is not used for boat fishing.
It cannot be easily mounted on a vehicle. Moreover, the above mechanism is
Regardless of whether the wheel braking device is adjusted manually or automatically, it is configured to inhibit adjustment of the vehicle brake section.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle brake system that eliminates or alleviates the above-mentioned problems of known vehicle brake systems.

[Means to solve the problem]

In view of the above, the present invention includes a brake operating member, at least one wheel braking device that brakes a wheel, and a mechanical link mechanism that connects the brake operating member and the wheel braking device, A link mechanism includes a brake cable and a link adjustment mechanism, the brake cable having an internal member that slides within a conduit, and the link adjustment mechanism having a second position that secures the conduit from a first position that does not secure the conduit. a conduit fixing device that moves to a position;
biasing means for applying tension to the internal member when the conduit securing device is in the first position and not securing the conduit, the conduit securing device engaging between protrusions on the outside of the conduit; A vehicle braking device is provided that includes at least one toothed portion.

Generally, the brake actuation member can be of known construction. The brake actuating member is preferably a manual brake, but may also be of another type, for example a foot pedal type brake.

Similarly, the wheel braking device is generally of well-known construction,
Any wheel braking device currently available on the market may be used. Also,
The vehicle braking system according to the invention includes one or more wheel braking systems, the number of which usually depends on the number of wheels connected to the vehicle braking system.

The conduit securing device may have a frusto-conical portion and be configured to engage a portion of a housing in which the conduit securing device operates, the portion having a complementary shape to the frusto-conical portion; In this case, when the two parts are engaged, the conduit fixing device moves into a position where it fixes the conduit.

The conduit may be flexible and may consist of one or more wires.

However, when a plurality of wires are used, it is preferable that the wires are intertwined with each other.

The vehicle braking device according to the invention may include friction means for transmitting the sliding movement of the internal member to the conduit fixing device, thereby causing the conduit fixing device to fix the conduit. The friction means may also be a spring disposed between the conduit securing device and the internal member, although other types of friction means may also be used.

In another embodiment of the invention, the vehicle braking device moves the conduit securing device from the first position to the second position.
It has friction means for moving it to the position and vice versa,
Additionally, a restriction means is provided on the internal member to ensure that the conduit securing device returns to a position of contact with the end wall of the link adjustment mechanism when the vehicle braking system is not activated.

The friction means may be provided between the conduit securing device and the conduit, or the friction means may be provided between a tubular member attached to the conduit securing device and a conduit extension member extending from the conduit end. It may be provided in between.

Usually, a spring is used as the biasing means used in this brake device.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show a vehicle braking system having a brake actuating member in the form of a manual brake 4. FIG. The brake device 2 includes a pair of wheel braking devices 6 that brake a pair of rear wheels 8 of a vehicle.

The vehicle brake system 2 has a mechanical link mechanism 10 that connects the manual brake 4 to the wheel brake system 6, and the mechanical link mechanism 10 includes a brake cable 12 and a link adjustment mechanism 14. The brake cable 12 also has an internal member 16 that slides axially within a conduit 18, and the link adjustment mechanism 14 is disposed at one end of the conduit 18 as shown. The other end of the conduit is a box-shaped shackle 20 that evenly distributes the braking force applied by the manual brake 4 to both wheel braking devices 6.
is connected to. The link adjustment mechanism 14 also includes a conduit fixing device 22 that is movable from the first position shown in FIG. 2, in which the conduit 18 is not fixed, to a second position, in which the conduit 18 is fixed. The link adjustment mechanism 14 is
The conduit securing device 22 includes biasing means in the form of a spring 24 for tensioning the internal member 16 when the conduit securing device 22 is in a first position where the conduit is not secured.

As best seen in FIG. 2, the conduit securing device 22 includes a plurality of toothed portions 26 that engage between the outer protrusions 28 of the conduit 18, the protrusions 26 It is shaped so that it can be easily fitted and removed between the protrusions 28, and can be firmly gripped and fixed when the toothed portion 26 is engaged between the protrusions 28.

The conduit securing device 22 has a frusto-conical shaped portion 30 that engages a complementary shaped portion 32 of the housing, as best seen in FIG. By engaging the two complementary shaped portions 30 and 32, the conduit securing device
8 is moved to a fixed position, and the toothed portion 26 is moved to a position where the protrusion 2
It fits into the gap between 8.

Since the conduit 18 is flexible, it can be guided to the wheel at any desired position. Preferably, the conduit 18 is of the type having wires intertwined to form the protrusion 28.

The vehicle braking device 2 comprises friction means 34 which are capable of transmitting the sliding movement of said internal member 16 to the conduit fixing device 22 and thereby fixing the conduit 18 to the conduit fixing device. As shown in FIG. 2, the friction means 34 are formed by a curved conduit passing through an extension 36 of the conduit securing device so that when the internal member 16 is pulled in the direction of arrow 36, the curved conduit Friction at , which causes internal member 16 to pull the entire conduit securing device 22 in the direction of arrow 38 . The above operation causes the frusto-conical portion 30 and the housing portion 32 to engage with each other. Since the conduit fixing device 22 is made of a flexible material such as plastic,
The end of the conduit fixation device 22 containing the toothed portion 26 is deformed inwardly so that the toothed portion 26 engages between the protrusions 28 .

A preferred friction means 34 is a friction generating spring 39 shown in FIG.
It is shown in the form of

During operation of the vehicle braking system 2, due to the action of the spring 24, which maintains a substantially constant tension in the internal member 16 when the conduit securing device 22 is in the first position, shown in FIG. Any slack occurring in the internal member 16 and/or in any part of the mechanical linkage between the manual brake 4 and the wheel braking device 6 is automatically eliminated. The spring 24 has its left end abutting a catch 40 fixed to the conduit 18, and its right end abutting an end wall 42 of a housing 44 forming part of the link adjustment mechanism 14. Further, the internal member 16 is provided with a shackle 52 at its terminal end, and is connected to the lower end of the manual brake 4 via a pivot pin 54, and the manual brake 4 itself is pivotally connected to a pivot shaft 56.

Referring now to FIG. 3, FIG. 1 is shown in the same figure.

A link adjustment mechanism is shown which operates similarly to that of FIG. For convenience of comparison and understanding, parts of the same type in FIG. 3 are given the same reference numerals as in FIGS. 1 and 2. In FIG. 3, the friction means is formed by a leaf spring 58 and is configured to slide while abutting between the protrusions 28 on the outside of the conduit 18. Conduit fixing device 2 facing leaf spring 58
A guide member 60, which is a part of 2, is provided. Third
In the figure, as the conduit 18 moves in the direction of the arrow 38, the conduit fixing device 22 moves from the unfixed position in which the conduit is not fixed, as shown in FIG. You can see that it moves to a fixed position. More specifically, movement of the conduit 18 in the direction of arrow 38 creates friction in the leaf spring 58 and guide member 60;
Movement of the conduit 18 is transmitted to the entire conduit fixation device 22 via the guide member 60. and the above-mentioned conduit fixing device 22
Due to the overall movement, said frusto-conical section 30 engages a complementary section 32 of the housing, thereby producing the above-mentioned locking effect.

Next, referring to Fig. 4, in the same figure as before,
Components of the same type as in FIGS. 1 to 3 are given the same reference numerals for convenience of comparison and understanding.

In FIG. 4, the link adjustment mechanism 14 includes a different type of conduit fixing device 22, which has only one toothed portion 62 and is configured to pivot about a pivot 64. There is. Additionally, spring 66 urges conduit securing device 22 to the position shown in FIG. A spring 68 connects the conduit fixing device 22 and the manual brake 4, and rotates the conduit fixing device 22 clockwise in FIG. 4 when the manual brake 4 is operated.
is configured to engage between the protrusions 28 of the conduit 18.

The conduit securing device 22 is precisely positioned in the conduit 18 whether a single tooth profile is used as in FIG. 4 or multiple tooth profiles are used as shown in FIGS. 1-3. It is clear that positioning is possible. Further, as will be easily understood by those skilled in this technical field, the above-described configuration allows the vehicle brake system of the present invention to be easily installed, and moreover, it is possible to install the vehicle brake system without any costly manual work during vehicle manufacturing. No adjustment required. Furthermore, the above-described operation of the link adjustment mechanism does not interfere with the adjustment of the wheel braking device 6, regardless of whether it is manual or automatic.

Further, by using the spring 24, tension is constantly applied to the internal member 16, and therefore, slack that occurs in various parts of the internal member 16 and the link mechanism that forms a part of the vehicle brake system 2 can be prevented by fixing the conduit. This can be effectively resolved when the device 22 is in the unlocked position.

The link adjustment mechanism 14 shown in FIG. 5 is similar to the link adjustment mechanism shown in FIG. 3 except that it has a limiting member in the form of a friction coupling 70 at the right end portion in FIG. In FIG. 5, the conduit fixation device 22 is moved by movement of the conduit transmitted through the friction coupling 58.
It performs locking and releasing operations, and engages with the conduit at an early stage of the braking stroke. The above means that in the brake release stroke, the conduit fixing device and the conduit are disengaged from each other at a late stage of the stroke.

A limiting member in the form of a friction coupling 70 in FIG.
2 is ensured to return to the end wall 42 on the conduit 18, if necessary. Normally, the friction force acting on the friction coupling 70 is the friction force acting on the friction coupling 5
The frictional force acting on 8.

The advantage of the link adjustment mechanism shown in FIG. 5 compared to the link adjustment mechanism shown in FIG. 3 is that the mechanism shown in FIG. It is possible to create a compact structure without any problems. Also, the link adjustment mechanism shown in FIG. 5 can be a particularly compact device. Furthermore, the friction coupling 70 allows setting the magnitude of the force exerted by the spring 24 on the brake rod when the brake is released.

FIG. 6 illustrates a link adjustment mechanism with a friction coupling 70 similar to that of FIG. The link adjustment mechanism shown in FIG. 6 further includes a conduit clamping friction device 72 mounted between an extension member 74 of conduit 18 and a tubular member 76 mounted within conduit securing device 22. ing. The internal member 16 of the brake cable slides freely within the conduit extension member 74.

As can be seen from FIGS. 5 and 6, the link adjustment mechanism shown in both figures is attached to the middle of the brake cable, with conduits on either side of the link adjustment mechanism. If desired, an embodiment in which the link adjustment mechanism of FIGS. 5 and 6 is located at the end of the conduit 18 of the brake cable is also possible.

7, 8, and 9 are cross-sectional views of various types of conduits 18 showing various shapes of protrusions 28. The projection 28 shown in FIG. 7 is similar in shape to, but not identical to, the projection 28 shown in FIGS. 1-4. Furthermore, as can be seen from the figures, FIGS. 8 and 9 show protrusions of different shapes.

It will be understood that the embodiments set forth in the above description of the invention with reference to the accompanying drawings are by way of example only and that many other modifications may be made.

For example, the manual brake 4 may be replaced by a foot pedal, or a larger number of wheel braking devices 6 may be used. Further, the wheel braking device 6 may be provided on the rear wheels, the front wheels, or all wheels of the vehicle. Further, the vehicle may be of the type, for example a passenger car, a luggage car, a truck, a bus, etc.

In a modified design (not shown), the cable can also be provided with a return spring that returns the actuating ring inside the wheel brake bag W6 to the stop position.

If the wheel brake device 6 does not have a suitable stop for the working ring, it is also possible to install a stop on the cable that limits the return movement of the working ring.

〔Effect of the invention〕

Since the vehicle brake device according to the present invention is configured as described above, it has the following effects.

Firstly, the vehicle brake system according to the present invention can be easily installed and does not require costly manual adjustments during vehicle manufacture.

Secondly, with the vehicle braking system of the present invention, the length change of the vehicle's brake linkage is adjustable over the entire service life of the vehicle.

Thirdly, the vehicle brake system according to the present invention does not interfere with the adjustment of the wheel brake system, whether the adjustment is manual or automatic.

Fourthly, according to the vehicle brake system of the present invention, tension is always applied to the internal members and compressive force is always applied to the conduit, so there is no need for a joint holder for the conduit at the joint between the conduit and the vehicle body. This is what happens.

[Brief explanation of the drawing]

1 is a schematic diagram of a vehicle braking system that includes a first link adjustment mechanism and acts on a pair of rear wheels of a vehicle; FIG. 2 is similar to the first link adjustment mechanism shown in FIG. 1; 3 shows the third link adjustment mechanism, FIG. 4 shows the fourth link adjustment mechanism, and FIGS. 5 and 6 respectively show the 5th link adjustment mechanism. A diagram showing a sixth link adjustment mechanism,
Figure 7. Figures 8 and 9 show different types of conduit exterior surfaces. 2... Vehicle brake device, 4... Manual brake, 6... Wheel braking device, 10... Mechanical link mechanism, 12... Brake cable, 14... Link adjustment mechanism, 16...・Internal members, 18...
Conduit, 22... Conduit fixing device, 24... Biasing spring, 26, 62... Tooth shaped portion, 2 days.
··protrusion.

Claims (1)

[Claims] 1. A vehicle braking device comprising a brake operating member, at least one wheel braking device that exerts a braking action on a wheel, and a mechanical link mechanism that connects the brake operating member to the wheel braking device, the mechanical link mechanism has a brake cable and a link adjustment mechanism, the brake cable having an internal member that slides axially within the conduit, and the link adjustment mechanism having a first position that secures the conduit from a first position that does not secure the conduit. a conduit fixing device that is movable to the second position; and the conduit fixing device is movable to the first position.
and a biasing means for applying tension to the internal member when the conduit is not fixed, the conduit fixing device having at least one biasing means that engages between a plurality of protrusions on the outside of the conduit.
A vehicle brake device characterized by comprising two tooth-shaped portions.