KR101256795B1 - Cable assembly of foot type brake for car and manufacturing method of end cap casing used therein - Google Patents

Abstract

A cable assembly installed on a pedal parking brake for restricting movement of a vehicle by a driver, the cable assembly having one end fixed to a vehicle body of the vehicle and the other end fixed to the pedal parking brake; A rubber film wrapped around the cable, the inside of the cable being slidably movable; A hooking portion and an extension portion which is bent and extends while wrapping the cable from the hooking portion, and the hooking portion and the extension portion are processed into one body from the time of manufacture and have a casing end cap installed at one end of the film. ; It consists of a single body independent of the cable from the time of manufacture, not only easy to manage the parts, but also to adjust the bending direction of the extension pipe with respect to the process or engaging body of the conventional locking body and extension pipe There is no need to go through the process, the time required to complete the cable assembly for the parking brake of the car is significantly shortened to provide a cable assembly for the pedal pedal parking brake of the car that can produce more cable assembly in a short time do.

Description

CABLE ASSEMBLY OF FOOT TYPE BRAKE FOR CAR AND MANUFACTURING METHOD OF END CAP CASING USED THEREIN

The present invention relates to a cable assembly for a pedal parking brake of a vehicle and a method of manufacturing a casing end cap used therein, and more particularly, to fix the end of the cable installed in the automobile pedal parking brake, or Casing end caps used to connect are integrally constructed at the time of manufacture, reducing the cost of manufacturing them and ensuring cable sliding of the cable assembly of the car's pedal parking brake and A method for producing a casing end cap.

In order to drive a car, an accelerator pedal and a brake pedal for acceleration are provided for the driver to drive the car. When the vehicle is to be parked, the parking brake is used to suppress the movement of the vehicle. In general, a hand parking brake is used for a small car and a pedal parking brake is used for a large passenger car.

In order to operate such a pedal parking brake, a cable assembly 1 for a pedal parking brake as shown in FIG. 1 is installed in a vehicle. That is, the pedal-type parking brake 90 is installed at the front lower part of the driver's seat, and one end of the pedal-type parking brake 90 is connected and fixed to the driver's vehicle body 80 so as to transmit the driver's pedaling force. The connection is fixed, and when the user presses the pedal, the force is transmitted through the cable 10 to perform the braking operation.

In this case, in order to prevent damage to the cable 10 that transmits the force, an area other than both ends of the cable 10 is wrapped by the rubber coating 20. In addition, the fixing plate 40 is predetermined on the film 20 of the cable 10 so that the cable 10 can be stably positioned along the path from the pedal parking brake 90 to the vehicle body 80. It is fixed in position and fixed to the vehicle body at intervals in the path of the cable assembly 1.

And, as shown in Figure 2, one end of the pedal-type parking brake cable 10 is firmly fixed to the vehicle body 80 by the connecting bracket 82, the other end is fixed to the parking brake 90 The parking brake is operated while the cable 10 moves relative to the film 20 fixed by the operation of the parking brake 90.

At this time, one end of the parking brake cable 10 is fixed to the casing end cap 30 shown in Figure 3 at the end thereof in order to be connected to the pedal-type parking brake 90. As shown in FIG. 3, the casing end cap 30 includes a locking body 31 having a hole 31h through which a cable 10 penetrates at an end thereof, and a curved extension part 32 extending from the locking body 31. It consists of At the end of the casing end cap 30, the cable 10 and the film 20 are fixed together, and the hole 31h of the locking body 31 is connected to the pedal parking brake 90 only through the cable 10. As a result, the film 20 is fixed by the operation of the pedal parking brake 90 while the cable 10 therein moves relative to the brake.

The casing end cap 30 is provided with an extension 32 for receiving the cable 10 and the encapsulation 20 over a length of approximately 10 cm to 25 cm, the extension 32 actuating the pedal parking brake. It is formed to be bent by the bent angle of the vehicle body 80 'so as to remain firmly fixed in position without shaking.

As described above, the casing end cap formed of the long and bent extension part 32 and the locking body 31 is formed by first bending an extension pipe forming the extension part 32 as shown in FIG. 4A at a predetermined angle. After that, in a separate process, the hollow shaft is forged and formed to prepare a locking body 31, and as shown in Fig. 4B, the end of the film 20 of the cable 10 is allowed to pass through the extension pipe. It is assembled so that it may be fitted to the hollow part of this latching body 31. Then, as shown in FIG. 4C, the angle of bending of the pipe 32 and the locking body 31 are rotated to adjust the angle, and then as shown in FIG. By pressing the outer side of the sieve 31 and plastically deforming the predetermined portion 30x inwardly, the extension pipe and the engaging portion engage with each other, and at the same time, the inner circumferential surface of the engaging portion is pressed against the film 20 to be gripped. This completes the assembly.

However, since the conventional casing end cap 30 manufactured as described above is integrated by plastic deformation by pressing the extension part 32 and the latching body 31 which are bent and formed into a pipe by a press working machine, The film 20 of the cable 10 is twisted, making it difficult to maintain the intended position. When the film is excessively compressed, the film 20 may be firmly gripped, but the sliding of the cable 10 inside the film 20 may occur. The movement of the pedal-type parking brake is hindered by the movement, and when insufficiently compressed, the casing end cap 30 is separated from the film 20 because the film 20 cannot be firmly gripped. The problem was caused. That is, it was difficult to keep the crimping degree of holding the cable 10 and the film 20 constant in the casing end cap 30.

In addition, in the case of manufacturing the casing end cap 30 by the method shown in Figures 4a to 4d, each of the engaging body 31 and the extension portion 32 is manufactured separately and pressed together with the cable 10 It is necessary to go through the process of joining, and since these parts must be manufactured and joined one by one, the process efficiency is lowered, which leads to a limitation in not producing a large amount of cable assemblies in a short time, which leads to a significant decrease in productivity and an increase in manufacturing cost. Problems have also arisen.

The present invention, in order to solve the problems described above, while firmly fixing the film surrounding the cable connected to the pedal-type parking brake of the vehicle, the cable is always smoothly sliding with respect to the film in accordance with the operation of the pedal-type parking brake. It is an object of the present invention to provide a cable assembly for a pedal-type parking brake of an automobile equipped with a casing end cap which allows relative movement and a method of manufacturing a casing end cap for use.

In this way, the present invention aims to contribute to ensuring a predetermined endurance life of the cable for the parking brake while ensuring the operation of the pedal parking brake.

In addition, the present invention has a casing end cap that is used to fix the end of the cable to be installed in the vehicle-type pedal parking brake or to connect with the pedal-type parking brake as a unitary structure from the time of manufacture of the cable connected to the pedal-type parking brake It is another object to reduce the cost and time required by improving the efficiency of the manufacturing process of the casing end cap and assembly with the cable, while ensuring the sliding movement of the cable in the casing end cap installed at the end.

In addition, another object of the present invention is to make the casing end cap of the cable assembly for automobile pedal parking brakes to be made of one part, to reduce the number of parts than in the prior art to facilitate parts management.

In order to solve the above problems, the present invention provides a cable assembly installed on a pedal-type parking brake for limiting the movement of a vehicle by a driver, one end of which is fixed to the vehicle body and the other end of the pedal-type parking brake. Set cable; A rubber film wrapped around the cable, the inside of the cable being slidably movable; A hooking portion and an extension portion which is bent and extends while wrapping the cable from the hooking portion, and the hooking portion and the extension portion are processed into one body from the time of manufacture and have a casing end cap installed at one end of the film. ; It provides a cable assembly for a pedal parking brake of a vehicle, characterized in that it comprises a.

That is, in the related art, the locking body and the extension part must be separately manufactured to be compressed and combined with the cable, and these parts must be manufactured one by one, and the two are combined together, thereby inevitably deteriorating the process efficiency and productivity. However, since the present invention configured as described above is composed of one body independently from the cable at the time of manufacture, it is not only easy to manage the parts, but also the process or the engaging body of the conventional locking body and the extension pipe of the extension pipe. Since it is not necessary to go through the process of adjusting the bending direction, the time required to complete the cable assembly for a closed parking brake of the vehicle can be significantly shortened to make more cable assemblies in a short time.

In this case, the extension part includes a first area for accommodating the film but holding the film, and a second area having a larger diameter than the first area for accommodating the film but not holding the film. . As such, since the casing end cap is constantly manufactured to fix the film surrounding the cable to the first area having a smaller inner diameter, the film can be always firmly held in the first area without a crimping process, and the second In the area, it is possible to guide the route so that the cable can be located along a defined route. In other words, the provision of the first region and the second region in the extension portion provides an advantageous advantage that the film surrounding the cable accommodated therein can always be stably and reliably gripped. At this time, the extension is formed to extend in a length of 10cm to 25cm.

The casing end cap as described above comprises a deep drawing process of forming a primary workpiece having a hollow portion of 10 cm to 25 cm corresponding to the extension by performing a deep drawing process on an iron plate; A rolling process of pressing the outer circumferential surface of the primary workpiece formed by the deep drawing process while pressing two or more rollers while rotating to form the locking portion and the first region at an end thereof; It is manufactured through a bending process of bending the extension portion. As described above, the deep drawing process is performed to deeply shape the inner workpiece of 7 mm to 20 mm to a depth of 10 cm to 25 cm to produce a casing-shaped primary workpiece, and to process the outer circumferential surface, the first region, and the second region by a rolling process. By going through the bending process, it is possible to eliminate the process of manufacturing by combining the conventional extension pipe and the locking body separately and to produce a casing end cap as a single body.

Since the primary workpiece is deeply molded to a depth of about 10 times or more than the inner diameter, rather than forming the primary workpiece by the deep drawing process at once, the pressure is gradually changed in the depth and width of the hollow portion at least seven times. As a result, the deep drawing process is performed and molded, which is effective in that a more accurate shape can be produced without defects.

As described above, the present invention provides a cable assembly which is installed on a pedal-type parking brake that the driver steps on to limit the movement of the vehicle, the cable having one end fixed to the vehicle body of the vehicle and the other end fixed to the pedal parking brake; ; A rubber film wrapped around the cable, the inside of the cable being slidably movable; A hooking portion and an extension portion which is bent and extends while wrapping the cable from the hooking portion, and the hooking portion and the extension portion are processed into one body from the time of manufacture and have a casing end cap installed at one end of the film. ; It is composed of a single body independent of the cable from the time of manufacture, not only easy to manage parts, but also to adjust the bending direction of the extension pipe with respect to the process or engaging body of the conventional locking body and extension pipe There is no need to go through the process, the time required to complete the cable assembly for the parking brake of the car is significantly shortened to provide a cable assembly for the pedal pedal parking brake of the car that can produce more cable assembly in a short time do.

In addition, the present invention does not grip the film surrounding the cable by crimping, but rather than the first area to accommodate the film but to hold the film, and to accommodate the film but not to hold the film. The second area having a large diameter is provided in the extension of the casing end cap, thereby firmly fixing the film surrounding the cable connected to the pedal parking brake of the vehicle without the pressing process, and for the operation of the pedal parking brake. Therefore, it is possible to always hold the film surrounding the cable stably and reliably so that the cable can always slide smoothly relative to the film.

In this way, the present invention contributes to ensuring the operation of the pedaled parking brake while ensuring a predetermined endurance life of the cable for the parking brake.

In addition, the present invention is to manufacture the casing end cap by forming a deep primary method by using a metal plate by a deep drawing method, overcome the limitation that was conventionally produced by dividing into an extension pipe and a locking body. In addition, since the casing end cap can be manufactured with a single body from the time of manufacture, and advantageously, the primary work formed deeply with a small inner diameter can be processed to an accurate dimension by molding in multiple steps by a deep drawing method.

In addition, according to the present invention, as the primary workpiece is molded by the deep drawing method, the pressing part, which is a working jig, can be used for a longer period of time than the conventional locking body by molding the solid shaft by a forging process, and thus the lifespan of the manufacturing equipment is also increased. Longer side effects can also be achieved.

1 is a view showing a cable connection configuration of a conventional vehicle pedal parking brake
Figure 2 shows the brake cable of Figure 1
Figure 3 is a longitudinal cross-sectional view showing the configuration of the casing end cap of Figure 2
Figures 4a to 4d is a photograph taken by the manufacturing process of the casing end cap shown in Figure 3a
Figure 5 is a longitudinal cross-sectional view showing the configuration of the casing end cap according to an embodiment of the present invention;
Figures 6a and 6b is a configuration of a deep drawing machine for performing a deep drawing process of the casing end cap of Figure 5
Figure 6c is a photograph taken in Figure 6a
FIG. 7A is an enlarged view of portion 'A' of FIG. 6A
FIG. 7B is an enlarged view of portion 'B' of FIG. 6B
Figure 8 is a photograph taken of the shape of the primary workpiece formed by the deep drawing process
Fig. 9 is a photograph photographing the rolling process of the primary workpiece
Figure 10 is a photograph taken of the casing end cap made through the bending process
FIG. 11 is a flowchart sequentially illustrating a manufacturing process of the casing end cap of FIG. 5.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A cable assembly for a pedal type parking brake of a vehicle according to the present invention, in the casing end cap 130 for fixing the film 20 at its end, and the cable assembly 1 shown in Figs. There is a difference. Therefore, in describing the present invention, a detailed description of a known function or configuration will be omitted to clarify the gist of the present invention.

Figure 5 is a longitudinal cross-sectional view showing the configuration of the casing end cap according to an embodiment of the present invention, Figures 6a and 6b is a configuration of a deep drawing machine for performing a deep drawing process of the casing end cap of Figure 5, Figure 6c 6A is a photograph taken in FIG. 7A is an enlarged view of part 'A' in FIG. 6A, FIG. 7B is an enlarged view of a part 'B' in FIG. 6B, and FIG. 8 is an image taken in the shape of a primary workpiece formed by a deep drawing process. 9 is a photograph showing a rolling process of the primary workpiece, FIG. 10 is a photograph of a casing end cap manufactured through a bending process, and FIG. 11 is a sequential diagram showing a manufacturing process of the casing end cap of FIG. Flowchart.

As shown in the figure, a cable assembly for a pedal parking brake of a vehicle according to an embodiment of the present invention, the cable assembly is installed on the pedal-type parking brake to limit the movement of the vehicle by the driver, one end of the vehicle The cable 10 is fixed to the vehicle body and the other end is fixed to the pedal-type parking brake 90, and the rubber film that wraps around the cable 10, the cable 10 in the inside so as to be sliding relative movement 20 and a casing end cap 130 which is processed into one body from the time of manufacture and is composed of the engaging portion I and the extended portion II and installed at one end of the coating film 20.

As shown in FIG. 5, the casing end cap 130 has a locking portion I having outward protrusions 130a and 130a 'formed to be fixed to a vehicle body, and extends in a longitudinal direction from the locking portion I. It consists of the extension part II processed so that it may be bent in curvature according to the installation space in a vehicle body.

Here, the hollow portion 130c of the casing end cap 130 may include a first region 131 formed of a small inner diameter d1 so as to grip the coating 20 wrapping the cable 10, and the cable 10. In order to serve as a guide of the coating 20, the coating 20 is divided into a second region 132 having an inner diameter larger than the inner diameter d1 of the first region 131 so as to have a predetermined gap with the coating 20.

In general, the cable 10 and the film 20 is made of a flexible material can not maintain itself in a curved path by its rigidity. Therefore, it is necessary to guide the path of the cable 10 to the bent part as shown in FIG. Accordingly, the casing end cap 130 is formed with a small inner diameter of approximately 7 mm to 20 mm to accommodate the coating 20, whereas the second area according to the design specification of the vehicle body to guide and maintain the path of the cable 10. 132 is formed in a long length of 10cm to 25cm.

The inner diameter d1 of the first region 131 is formed to have a size such that the film 20 is firmly fixed but the cable 10 positioned therein smoothly slides with respect to the film 20. To this end, the first region 131 is machined such that its outer circumferential surface 131s is gradually retracted by the rolling device 60 so that the dimension of the inner diameter d1 is within a precise tolerance range. As a result, the first region 131 can grip the coating 20 so that the movement of the coating 20 can be suppressed while the cable 10 accommodated therein can move smoothly in the longitudinal direction.

A hole 130h through which the cable 10 penetrates is formed in the distal end surface of the locking portion I of the casing end cap 130, and a stepped portion 130m through which the distal end portion of the coating 20 is engaged is formed. Accordingly, when the film 20 having the cable 10 exposed is inserted into the hollow portion 130c of the casing end cap 130 and inserted into the first region 131, the film 20 has a predetermined step 130m. ), So that the entire length of the cable 10 can be precisely matched.

A method of manufacturing the casing end cap 130 of the cable assembly for a pedal main brake configured as described above will be described in detail with reference to FIGS. 6A to 11.

Step 1 : The casing end cap 130 is processed into a casing-shaped primary workpiece 70z having a hollow portion 130c by a deep drawing process on the metal plate 70. At this time, the deep drawing process uses the deep drawing machine 200 shown in Figs. 6A to 6C.

The deep drawing machine 200 is provided with a plurality of pressing portions (211a, 211b, 211c, ..., 211i, 211j, 211k, 211l, 211m, ...; 211 to press on the upper side of the material to be processed A moving body 210, a fixed body 220 for fixing the metal plate 70 to be processed and sequentially move in the direction indicated by 77, and a plurality of pressing portions 211 fixed to the moving body 210 Guide plate 230 for guiding the pressing portion 211 to reach the correct position when moving downward.

Here, the plurality of pressing parts 211 fixed to the moving body 210 presses the metal plate 70 step by step while the metal plate 70 moves in the direction indicated by reference numeral 77. Specifically, as shown in Figs. 7A and 7B, the metal plate 70 is processed into the workpiece indicated by 70i by the i-th pressing portion 211i, and then 70j by the j-th pressing portion 211j. It is processed into the workpiece shown, and then to the workpiece indicated by 70k by the k-th pressing part 211k.

As such, as the fixed body 220 moves in the direction indicated by the reference numeral 77, the metal plate 70, which is a raw material, moves together with the fixed body 220, and the z-th pressing part 211z from the a-th pressing part 211a. The deep drawing method is then sequentially and precisely processed into the desired shape by the deep drawing method.

The pressing portion 211 of the movable body 210 is used to initially press the metal plate 70 as it is positioned to the left side of FIGS. 6A to 7B, and at least one of height and width is formed to be smaller, and FIG. 6A. 7b, the larger the height or width of the metal plate 70 is used to press the metal plate 70 later. For example, the height h1 of the i-th pressing part 211i shown in FIG. 7A is formed to be smaller than the height h2 of the k-th pressing part 211k, and then presses the k-th pressing part 211k. ) Processes the metal plate 70 to have a longer shape after the i-th deep drawing process. However, the i-th pressing part 211i is formed to have a wider width in advance, and thus is formed in a wider width than the k-th pressing part 211k.

On the upper side of the fixed body 220, a cradle 75 is mounted on which the metal plate 70 to be processed is mounted. Here, the holder 75 is formed with a groove for receiving the pressing portion 211 fixed to the moving body 210 when the moving body 210 moves downward to press the metal plate 70 to perform the drawing process.

In addition, the guide plate 230 guides to press the correct position when the moving body 210 moves downward for the deep drawing process, and a hole through which the pressing part 211 of the moving body 210 passes is formed. .

After mounting the metal plate 70 to be processed to the cradle 75 of the deep drawing processing machine 200 configured as described above, as shown in Figure 6a, moved in the direction indicated by the reference numeral 77 (S110), the first press The part 211a presses the metal plate 70 to be processed to form a workpiece having a slight groove (S120).

Step 2: Next, the fixed body 220 is moved one step in the direction indicated by reference numeral 77 so that the workpiece formed by the first pressing portion 211a is located below the second pressing portion 211b (S130). The second pressing portion 211b pressurizes the workpiece, and the hollow portion 130c is formed into a workpiece having a larger size (S140). At this time, the metal plate 70 may be located on the cradle 75 in a size that is formed by one pressing portion 211, but is formed large enough or divided into a plurality of pressing portions 211 at the same time It is also possible to configure the two workpieces to be molded.

The process of S110 to S140 is repeated to be molded by the subsequent press parts 211c, 211d, .... Through this, an elongated casing-shaped primary workpiece 70z shown in Fig. 8 is formed in which one or both ends are blocked and the other end is opened.

Step 3 : The casing-shaped primary workpiece 70z produced by the above process is subjected to a rolling process in which the outer circumferential surface is gradually pressed by a rolling device 60 having three rotating rollers 61 to form a desired shape. (S150). The primary work piece 70z is rotationally driven while the other end is firmly fixed to the grip part 62 during the rolling process, and is processed to have the shape of the locking part I of the casing end cap 130, and at the same time, The outer circumferential surface 131s of the region 131 is pressed to be exquisitely processed to the inner diameter d1 which can firmly fix the coating 20.

At this time, the outer circumferential surface 132s of the second region 132 is simply rolled for appearance.

Step 4 : The workpiece subjected to the rolling process is bent to bend at a predetermined curvature in the second region 132 as shown in FIG. 10, thereby completing the manufacture of the casing end caps 130 and 130 '(S160). .

Since the casing end caps 130 and 130 'manufactured as described above are processed in a completely independent state from the cable for parking brake unlike the conventional method shown in FIGS. 4A to 4D, the processing process is simplified and high precision is achieved. It can be processed into a product having. The parking brake cable can be easily assembled by inserting the coating film 20 surrounding the cable 10 into the casing end caps 130 and 130 ′ thus manufactured and inserting it into the first region 131.

As such, the cable assembly for the pedal-type parking brake and the casing end cap 130 to be used as described above is a process of combining the conventional locking body and the extension pipe or adjusting the bending direction of the extension pipe with respect to the locking body. Because it does not need to go through, the time required to complete the cable assembly for the closed parking brake of the car is greatly shortened, which not only has the advantage of manufacturing more cable assemblies in a short time, but also without the crimping process. According to the operation of the pedal-type parking brake, the parking brake cable can obtain an advantageous effect of fixing the film in such a state that the cable can always be smoothly moved relative to the film. Through this, the present invention can ensure the predetermined endurance life of the cable for the parking brake while ensuring the operation of the pedal-type parking brake.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10: cable 20: film
70: workpiece 130: casing end cap
131: first region 132: second region
130a, 130a ': latching portion 130h: cable through hole
200: deep drawing machine 210: moving body
211: pressure unit 220: fixed body
230: guide plate

Claims (5)

A cable having one end fixed to the vehicle body and the other end fixed to the pedal parking brake; A rubber film wrapped around the cable, the inside of the cable being slidably movable; A hooking part and an extension part bent and extending in a length of 10 cm to 25 cm while wrapping the cable from the locking part, the first area accommodating the film and holding the film, and the film accommodating the film It comprises a second area having a larger diameter than the first area so as not to grip the, wherein the engaging portion and the extension portion is made of a casing end cap which is processed into one body from the time of manufacture and installed on one end of the film A method of manufacturing the casing end cap of a cable assembly for a pedal parking brake of an automobile,
A deep drawing process of forming a primary workpiece having a hollow portion of 10 cm to 25 cm corresponding to the extension by performing a deep drawing process on the metal plate;
A rolling process of rolling the process by pressing two or more rollers while rotating the outer peripheral surface of the primary workpiece formed by the deep drawing process to form the locking portion and the first region at an end thereof;
A bending process of bending the extension part;
And a casing end cap of the cable assembly for a pedal parking brake of an automobile, characterized by manufacturing the casing end cap.
The method of claim 1,
Manufacturing of the casing end cap of the cable assembly for the pedal type parking brake of the vehicle, characterized in that the primary workpiece is formed by a deep drawing step is performed at least seven times by a pressing unit for changing any one or more of depth, width. Way.
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