JP2014025543A - Cable connection device for drum brake-type electric parking brake equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an operation for connecting a connector 2a provided at an end of a cable 1a and a link arm 24a configuring a link mechanism 23 for lengthening an interval between a pair of brake shoes.SOLUTION: A connection part 3a provided at a base end of a connector 2a is provided with an insertion hole 30 through which a tip of a cable 1a can be inserted. A fastener 29 having an outside diameter larger than an inside diameter of the insertion hole 30 is fixed to the tip of the cable 1a. The connector 2a can be displaced with respect to the cable 1a, and an operation for laying a connection pin 28 between a tip of the connector 2a and a link arm 24a can be easily performed.

Description

  The present invention relates to an improvement in a cable connection device for a drum brake type electric parking brake device in which a braking force is generated by widening a distance between a pair of brake shoes by an electric motor. Specifically, it is intended to realize a structure that facilitates connection work between a connecting tool provided at an end of a cable and an expansion mechanism for expanding the distance between the two brake shoes. In the drum brake type electric parking brake device which is the subject of the present invention, the drum brake is used both as a service brake for decelerating or stopping the vehicle from the running state and a parking brake for keeping the stopped state. Of course, the service brake includes a disc brake, and the parking brake includes only a drum brake.

  It is common practice to incorporate into a drum brake a parking brake device that keeps the vehicle stationary without depressing the brake pedal. Also, parking brakes can be mechanically (non-hydraulic) using an electric motor as a drive source and via a force-increasing mechanism such as a toggle mechanism, as described in Patent Document 1, for example. It is known from and implemented in some vehicles. Patent Document 1 describes a structure in which a service brake is a hydraulic disc brake, and a parking brake is a mechanical drum brake using an electric motor as a drive source.

  In the drum brake type electric parking brake device described in Patent Document 1, the distance between a pair of brake shoes supported on the outer surface of the backing plate so as to be able to displace the backing plate in the radial direction is set as an electric actuator unit. It is configured to expand with. This electric actuator unit is composed of a combination of an electric motor and a speed reducer, and based on energization to this electric motor, pulls a cable through a gear type reduction mechanism and a screw type rotation / linear motion conversion mechanism, Further, the distance between the end portions in the circumferential direction of the two brake shoes is extended by an extension mechanism such as a link mechanism.

  In such a drum brake type electric parking brake device, the cable connecting device for connecting the end portion of the cable and the components of the expansion mechanism is called a clevis, and a connecting tool having a bifurcated tip half portion. And a connecting pin. That is, in a state in which a part of the constituent members of the expansion mechanism is disposed between a pair of connection plate portions constituting the first half of the connection tool, the connection plate portions are formed at positions that are aligned with each other. The connecting pin is inserted into a circular input side mounting hole and a circular output side mounting hole formed in a part of the component member, and the connection tool and the component member are connected to each other so as to transmit a tensile force. ing.

  Conventionally, as shown in FIG. 12, the end of the cable 1 is directly connected and fixed to the base end of the connector 2. The connector 2 is made of a metal material such as mild steel that can be plastically deformed and that can ensure the required strength and rigidity, and is provided with a bottomed cylindrical connecting portion 3 at the base end. Yes. In addition, the front half of the connector 2 has a bifurcated shape including a pair of connection plate portions 4 and 4 that are spaced apart from each other. In addition, circular input side mounting holes 5 and 5 are formed at positions where both the connecting plate portions 4 and 4 are aligned with each other. The end portion of the cable 1 and the base end portion of the connector 2 are formed in such a manner that the diameter of the connection portion 3 is reduced in a state where the end portion of the cable 1 is inserted into the connection portion 3. The outer peripheral surface of the part and the inner peripheral surface of the connection part 3 are strongly brought into contact with each other to be coupled and fixed. Further, the both inputs formed on the connecting plate portions 4 and 4 in a state where a part of the constituent members (not shown in FIG. 12) of the expansion mechanism is disposed between the connecting plate portions 4 and 4. The connecting pin is inserted through the side mounting holes 5 and 5 and the output side mounting hole formed in the component member. And this component pin and the said connector 2 connect this component member and the said connection tool 2 so that transmission of the tensile force applied from the said cable 1 is possible. A portion of the cable 1 that is detached from the connector 2 is covered with a bellows-shaped dustproof boot 6. Further, the end portion of the dustproof boot 6 is held down by the holding ring 7 toward the outer peripheral surface of the cable 1.

  In the case of the conventional structure related to the cable connection device for the drum brake type electric parking brake device as described above, the connection tool 2 is not displaced in the length direction of the cable 1 with respect to the cable 1. For this reason, the connection work (insertion work of the connecting pin) between the connection tool 2 and the constituent members of the expansion mechanism tends to be troublesome. This is because the electric actuator unit is assembled on the inner surface side (the center in the width direction of the vehicle body) of the backing plate, and the expansion mechanism is assembled on the surface side of the backing plate (the outer side in the width direction of the vehicle body). This is because it is performed in the state. In this state, the input side mounting holes 5 and 5 on the connection tool 2 side and the output side mounting holes on the component member side of the expansion mechanism are not necessarily aligned to the extent that the connecting pin can be inserted. If they are not aligned, the electric actuator unit displaces the cable 1 in its length direction (by energization or manually), so that the input side mounting holes 5, 5 and the output side mounting hole Must be matched. Such work is troublesome and causes an increase in the assembly cost of the drum brake type electric parking brake device.

  In consideration of facilitating the insertion operation of the connection pin, after the insertion operation of the connection pin with the cable sufficiently extended, the electric actuator unit is moved to the back side of the backing plate. It is also possible to support and fix to. However, in that case, it is not only necessary to perform the insertion operation of the connecting pin while supporting the electric actuator unit, but when the electric actuator unit is supported and fixed to the backing plate, the cable is pulled back by a predetermined amount. The operation of inserting the connecting pin becomes troublesome from another side, such as when work is required.

JP-T-2001-504417

  In view of the circumstances as described above, the present invention is a structure that facilitates connection work between a connection tool provided at an end of a cable and an expansion mechanism for widening the distance between a pair of brake shoes. Invented to realize the above.

  The drum brake type electric parking brake device incorporating the cable connecting device of the present invention pulls the cable with an electric actuator unit using an electric motor as a power source. And the space | interval of the circumferential direction edge parts of both these brake shoes is expanded by the expansion mechanism provided between the edge parts of a pair of brake shoes. Further, a braking force is generated by pressing the linings of both brake shoes against the inner peripheral surface of the drum that rotates together with the wheels. The cable connection device that is the subject of the present invention is incorporated in such a drum brake type electric parking brake device, and connects the tip of the cable and the components of the expansion mechanism.

Such a cable connecting device for a drum brake type electric parking brake device of the present invention includes a connecting tool, a stopper, and a connecting pin.
Of these, the connecting tool has a bifurcated shape including a pair of connecting plate portions disposed at a distance from each other in the first half. Further, an insertion hole through which the distal end portion of the cable can be inserted from the proximal end surface side is provided at the proximal end portion.
Further, the stopper has an outer diameter larger than the inner diameter of the insertion hole, and the distal end portion of the cable through which the insertion hole is inserted from the base end surface side of the connection tool. It is fixed to the part protruding to the tip side.
The connecting pin includes an input side mounting hole formed in each of the connection plate portions and an output side mounting hole formed in a part of the constituent member of the expansion mechanism disposed between the connection plate portions. The component member and the connector are connected to each other so as to transmit a tensile force.

When the cable connecting device for drum brake type electric parking brake device of the present invention as described above is implemented, preferably, the cable is connected to the middle portion of the cable at the end portion of the cable as in the invention described in claim 2. The tip of the dustproof boot made of an elastic material is held and fixed by a restraining ring at a portion separated from the stopper in the length direction. And, between the tip edge of the dustproof boot and the stopper, it is possible to expand and contract in the longitudinal direction of the cable, and has an outer diameter larger than the inner diameter of the insertion hole, such as a rubber cylinder, a compression coil spring, etc. A member is arrange | positioned in the state externally fitted to this cable.
Further, when carrying out the invention described in claim 2, as in the invention described in claim 3, the elastic member is part of the elastic material constituting the dustproof boot from the restraining ring. Also, the dustproof boot and the integral structure can be made to protrude toward the stopper.

According to the cable connecting device for the drum brake type electric parking brake device of the present invention configured as described above, the connecting mechanism provided at the end of the cable and the expansion mechanism for expanding the distance between the pair of brake shoes. Connection work with the constituent members can be facilitated.
That is, the connector can be displaced to some extent in the length direction of the cable. For this reason, even when the electric actuator unit and the expansion mechanism are assembled in advance in a predetermined portion, the input side mounting hole formed on the connector side and the output side mounting hole formed on the constituent member of the expansion mechanism can be easily provided. Can be matched.
As a result, it is possible to facilitate the assembling work of the drum brake type electric parking brake device including the connecting work between the connecting tool and the constituent members of the expansion mechanism.

According to the invention described in claim 2, before the connection work, the connection tool is prevented from rattling with respect to the cable, and the input side mounting hole and the output side mounting hole are aligned. Can be simplified. That is, during this operation, the attachment holes can be aligned with each other by displacing the connection tool by a desired amount against the elasticity of the elastic member. In other words, it is not necessary to align these mounting holes so as to pick up the connecting tool which is a small part. For this reason, it is possible to facilitate the alignment work between these mounting holes.
Furthermore, according to the invention described in claim 3, since it is not necessary to separately prepare an elastic member for exhibiting such actions and effects, it is possible to easily perform parts production, parts management, and assembly work.

The perspective view which shows the 1st example of embodiment of this invention in the state seen from the outer side and radial direction outer side except the drum. FIG. 2 is a cross-sectional view taken along the line aa in FIG. 1. Bb sectional drawing. The enlarged perspective view which takes out and shows an electric actuator unit and a connection tool. Furthermore, the orthographic projection shown in the state which assembled | attached the link mechanism which is an expansion mechanism, and was seen from the same direction as FIG. FIG. 6 is an orthographic view seen from the right side of FIG. 5. Cc sectional drawing of FIG. The d section enlarged view of FIG. The upper part enlarged view of FIG. A state (A) in which the connecting pin is spanned between the connection tool and the link mechanism and the retaining bracket is rotated to a position where the retaining pin has a retaining function, and the retaining pin is used to perform the spanning operation of the connecting pin. The upper enlarged view of FIG. 5 which each shows the state (B) which rotated the metal fitting to the side. The figure similar to FIG. 9 which shows the 2nd example of embodiment of this invention. The expanded sectional view of the edge part of a cable and a connection tool which shows an example of the conventional structure.

[First example of embodiment]
FIGS. 1-10 has shown the 1st example of embodiment of this invention corresponding to Claim 1,2. The structure of this example is shown when the present invention is applied to a drum-in-disc brake. The drum brake type electric parking brake device in which the cable connecting device of this example is incorporated includes a backing plate 8, a pair of brake shoes 9, 9, a drum (not shown), an anchor 10, and an electric actuator unit 11. Prepare. Among these, the backing plate 8 is screwed and fixed to the outer surface of the knuckle 12 constituting the suspension device. In addition, in order to prevent the main part of this example from being hidden, the knuckle 12 is shown in the drawing, and only the frame-like frame portion for supporting the wheels is shown in the drawing. .

  The backing plate 8 is formed into a substantially annular shape with a part of the outer diameter portion cut off by pressing a metal plate having sufficient strength and rigidity, such as a steel plate, and a bent portion is formed at the outer peripheral edge portion. Bending rigidity is improved by forming a step part in the main part while forming. The notch 13 formed in a part near the outer diameter is formed to arrange a support or caliper that constitutes a disc brake that is a service brake. The backing plate 8 having such a configuration is coupled and fixed to the frame portion of the knuckle 12 by a plurality of (for example, about four) bolts 27 and 27.

  Each of the brake shoes 9, 9 is fixed to the outer surface of the back plate 15 and the back plate 15 fixed along the outer periphery of the web 14. And lining 16. The two brake shoes 9, 9 each having such a configuration are supported on the outer surface of the backing plate 8 so as to be able to displace the backing plate 8 in the radial direction. The structure of this example uses a duo-servo type drum brake as a parking brake device. For this purpose, both end faces in the circumferential direction of the anchor 10 in which the circumferential edges of the webs 14, 14 of the brake shoes 9, 9 are fixed to the outer surface of the backing plate 8. Further, they are in contact (anchor side during non-braking and during braking) or close to each other (opposite anchor side during braking). Further, the other circumferential edges of the webs 14, 14 of the brake shoes 9, 9 (upper circumferential edge surface in FIG. 1) are abutted against both axial end faces of the floating anchor 17. Further, return springs 18a and 18b are spanned between the webs 14 and 14 of the brake shoes 9 and 9, and the brake shoes 9 and 9 are directed radially inward (in the brake releasing direction). Gives elasticity.

  The drum is provided so as to surround both the brake shoes 9 and 9 in a state of being coupled and fixed to the rotation side flange of the hub unit supported by the knuckle 12 and rotates together with the wheels. Since the structure of this example is a drum-in disc brake, a disc provided on the outer diameter side of the drum and provided integrally with the drum is used. A pair of pads supported by a support or caliper disposed in the notch 13 of the backing plate 8 is disposed with the disk sandwiched from both sides in the axial direction. When the service brake is activated, the disk is strongly held from both sides by the two pads.

  Further, the anchor 10 is supported and fixed by a plurality of sets of bolts 27 and 27 and nuts at a part of the outer surface of the backing plate 8 between the circumferential ends of the brake shoes 9 and 9. ing. In the case of this example, the anchor 10, the backing plate 8, and the electric actuator unit 11 are coupled and fixed to the frame portion of the knuckle 12 by the same bolts 27 and 27 and nuts. Although not shown, a structure for supporting and fixing the electric actuator unit on the inner side surface of the backing plate as described in Patent Document 1 is also conventionally known. When such a structure is employed, a through hole through which the electric actuator unit can be inserted is provided in the frame portion of the knuckle. Of course, such a structure is also an object of the present invention.

  The electric actuator unit 11 is formed by combining an electric motor 19 and a gear-type speed reducer 20 as in the conventional structure described in Patent Document 1. Then, based on the energization of the electric motor 19, the cable 1a is pulled by the screw rod 21 constituting the feed screw mechanism which is a rotation / linear motion conversion mechanism, and the total length of the link mechanism 23 which is a toggle type extension mechanism is reduced. I try to expand. For this purpose, the cable 1 a is inserted through a through hole 38 formed in the frame portion of the knuckle 12. The link mechanism 23 is for extending the distance between the circumferential ends of the brake shoes 9 and 9 as the electric actuator unit 11 pulls the cable 1a when the parking brake is operated. The brake shoes 9 and 9 are provided between the circumferential edges of the webs 14 and 14 adjacent to the anchor 10.

  The link mechanism 23 is a structure that has been generally implemented in the technical field of a parking brake device for a drum brake, and is formed by connecting a pair of link arms 24a and 24b so as to be swingable and displaceable by a pivot 25. . In addition, the engagement recesses 26a and 26b formed at the base end edges (the end edges opposite to each other) of the link arms 24a and 24b are arranged around the circumferences of the webs 14 and 14 constituting the brake shoes 9 and 9, respectively. One end of the direction is abutted. Furthermore, the portions adjacent to both the locking recesses 26a and 26b are abutted against the end surfaces of the heads of the bolts 27 and 27. Accordingly, both the link arms 24a and 24b swing around these abutting portions. Of the link arms 24a and 24b, one link arm 24a is provided between the other link arms 24b. For this purpose, the other link arm 24b is configured by folding back an intermediate portion of a metal plate as a material by 180 degrees. In addition, since the structure of such a link arm 24b is also well-known conventionally, detailed illustration and description are abbreviate | omitted.

Further, the end of the cable 1a is connected to the end (upper end in FIG. 3) of one (lower side in FIG. 3) of the link arm 24a via a connecting tool 2a, a connecting pin 28, and a stopper 29. Are combined. The structure of this connecting portion is a characteristic part of the present invention.
The connecting tool 2a among the components of the coupling part is integrally formed by forging a metal material or by die casting, or by injection molding a high-functional resin. The front half (the left half of FIGS. 2, 3 and 8, the upper half of FIGS. 4, 6, 7 and 9) is bifurcated, and the base end (the right end of FIGS. 2, 3 and 8, FIG. 4, 6, 7 and 9) are short tubular connecting portions 3 a. That is, the first half of the connection tool 2a includes a pair of connection plate portions 4a and 4a that are arranged substantially parallel to each other with a space therebetween, and the connection plate portions 4a and 4a are aligned with each other. Input side mounting holes 5a and 5a are formed, respectively. Further, the connecting portion 3a constituting the base end portion of the connection tool 2a is provided with an insertion hole 30 penetrating the connection portion 3a in the axial direction, and the distal end portion of the cable 1a can be inserted into the insertion hole 30. It is said. That is, one end of the insertion hole 30 is opened on the base end surface side of the connection portion 3a, and the other end is opened on the distal end surface side of the connection portion 3a, between the connection plate portions 4a and 4a. . The inner diameter of the insertion hole 30 is slightly larger than the outer diameter of the distal end portion of the cable 1a. Therefore, the tip of the cable 1a can be loosely inserted into the insertion hole 30.

  The stopper 29 is made of a metal material that is plastically deformable and has sufficient strength and rigidity, such as mild steel, and has an outer diameter larger than the inner diameter of the insertion hole 30. Such a stopper 29 is formed by projecting the insertion hole 30 from the proximal end surface side of the connection portion 3a to the distal end side of the connection portion 3a at the distal end portion of the cable 1a. It is being fixed to the part between connecting plate part 4a, 4a. The stopper 29 is fixed to the distal end portion of the cable 1a by plastically deforming the stopper 29 in the reduced diameter direction, as is widely known conventionally.

  The link pin 28 is disposed between the input side mounting holes 5a and 5a formed in the connection plate portions 4a and 4a, respectively, and the connection plate portions 4a and 4a. 23 is inserted through an output side mounting hole 22 formed in a portion near the tip of the link arm 24a constituting the portion 23. In this state, both ends of the connecting pin 28 are fitted and supported in the input side mounting holes 5a and 5a, and an intermediate part of the connecting pin 28 is inserted into the output side mounting hole 22 to The movement of 2a can be transmitted to the link arm 24a.

  Furthermore, in the case of the structure of this example, the tip of the rubber dustproof boot 6 is placed at a portion near the tip of the middle portion of the cable 1a and at a portion separated from the stopper 29 in the length direction of the cable 1a. The holding ring 7 holds and fixes. And the elastic member which can be expanded-contracted regarding the length direction of the said cable 1a between the front-end edge of this dustproof boot 6, and the connection part 3a of the said connection tool 2a, and has an outer diameter larger than the internal diameter of the said insertion hole 30. The rubber cylinder 31 is arranged in a state of being externally fitted to the cable 1a. The elasticity (rigidity) of the rubber cylinder 31 is kept low enough to support the weight of the connector 2a.

  In order to assemble the structure as described above, the operation of inserting the connecting pin 28 into the input side mounting holes 5a and 5a of the connector 2a and the output side mounting hole 22 on the link arm 24a side is shown in FIG. As shown in B), the retaining metal fitting 32 formed by folding the elastic metal plate into a U-shape is rotated in the lateral direction. The retaining bracket 32 will be briefly described because it has been widely used in the past. When the connecting pin 28 is inserted into the mounting holes 5a and 22, the retaining bracket 32 is rotated around the protrusions 33 projecting on both side surfaces of the link arm 24b, and The mounting holes 5a and 22 are exposed at the notch 34 portion. In this state, the connecting pin 28 is inserted into each of the mounting holes 5a and 22. In the case of the cable connecting device for the drum brake type electric parking brake device of this example, the connecting tool 2a is displaced to some extent in the length direction of the cable 1a during the insertion work.

  For this reason, even when the electric actuator unit 11 is assembled on the inner surface side of the frame portion of the knuckle 12 and the link mechanism 23 is assembled on the outer surface side of the backing plate 8, the both parts formed on the connection tool 2 a side are also provided. The input side mounting holes 5a and 5a and the output side mounting holes 22 formed in the link arm 24a constituting the link mechanism 23 can be easily aligned. In addition, in the case of the structure of this example, the operation of aligning the input side mounting holes 5a, 5a and the output side mounting hole 22 is performed by lightly pressing the connector 2a toward the rubber cylinder 31. Yes. It is not necessary to align the mounting holes 5a and 22 with each other so as to pick up the connecting tool 2a, which is a small component (by moving it in both directions with fingers). For this reason, it is possible to more easily align the mounting holes 5a and 22 with each other. The rubber cylinder 31 also serves to prevent the connecting tool 2a from greatly rattling against the cable 1a before the connection work.

  The both end portions of the connecting pin 28 are internally fitted and supported in the input side mounting holes 5a and 5a (preferably by interference fitting), and the intermediate portion of the connecting pin 28 is connected to the output side mounting hole 22. Insert it loosely. In this state, after the connecting pin 28 is inserted into the mounting holes 5a and 22, the retaining metal fitting 32 is rotated to the state shown in FIG. A locking projection 35 provided on the side and a locking hole 36 provided on the link arm 24b side are engaged. In this state, the retaining bracket 32 reliably prevents the connecting pin 28 from coming out of the mounting holes 5a and 22, and the connection is possible even in a state before the assembly of the drum brake type electric parking brake device is completed. The tool 2a and the link mechanism 23 can be held in a desired positional relationship, and the efficiency of the assembly work of the drum brake type electric parking brake device can be improved. The stroke position of the electric actuator unit 11 is roughly regulated in advance. Therefore, the range of position adjustment of the connector 2a relative to the cable 1a is only a few mm. In general, it is sufficient to secure about 5 to 10 mm.

  When the assembly of the drum brake type electric parking brake device is completed and the parking brake is operated, the base end surface of the stopper 29 fixed to the distal end portion of the cable 1a and the connecting portion 3a of the connecting device 2a. The tip end surface of the cable 1a engages, and the pulling force of the cable 1a is transmitted to the connector 2a. Then, the connecting tool 2a pulls the tip end portion of the link arm 24a through the connecting pin 28, and the link mechanism 23 widens the interval between the circumferential end portions of the brake shoes 9, 9, so that both The linings 16 and 16 of the brake shoes 9 and 9 are pressed against the inner peripheral surface of the drum to generate a braking force.

[Second Example of Embodiment]
FIG. 11 shows a second example of an embodiment of the present invention corresponding to claims 1 to 3. In the structure of this example, a part of the rubber material constituting the dustproof boot 6 a is suppressed and protruded toward the stopper 29 rather than the ring 7 to form a protruding portion 37. And this protrusion part 37 is provided between the front-end edge of the said dustproof boot 6a, and the stopper 29, and has a function as an elastic member which can be expanded-contracted regarding the length direction of the cable 1a.
According to such a structure of this example, it is not necessary to prepare an elastic member separately, so that it is possible to easily perform parts production, parts management, and assembly work.
The projecting portion 37 does not need to be a cylindrical shape that is continuous over the entire circumference, and can be formed into a partially cylindrical shape having discontinuous portions at one or more locations in the circumferential direction, and the rigidity can be appropriately reduced.

  The present invention is not limited to the drum-in-disc brake as shown in the figure, and can be implemented by a structure in which both the service brake and the parking brake are performed by the drum brake. Also, the structure of the drum brake is not limited to the duo-servo type as shown in the figure, and other structures such as a leading trailing type and a two-leading type can also be adopted.

DESCRIPTION OF SYMBOLS 1, 1a Cable 2, 2a Connection tool 3, 3a Connection part 4, 4a Connection board part 5, 5a Input side mounting plate 6, 6a Dust-proof boot 7 Holding ring 8 Backing plate 9 Brake shoe 10 Anchor 11 Electric actuator unit 12 Knuckle 13 Notch 14 Web 15 Back plate 16 Lining 17 Floating anchor 18a, 18b Return spring 19 Electric motor 20 Reducer 21 Screw rod 22 Output side mounting hole 23 Link mechanism 24a, 24b Link arm 25 Axes 26a, 26b Locking recess 27 Bolt 28 Connecting Pin 29 Stopper 30 Insertion Hole 31 Rubber Tube 32 Retaining Bracket 33 Projection 34 Notch 35 Locking Projection 36 Locking Hole 37 Projecting Portion 38 Through-hole

Claims (3)

By pulling the cable with an electric actuator unit that uses an electric motor as a power source, the distance between the ends in the circumferential direction of both brake shoes is expanded by an extension mechanism provided between the ends of the pair of brake shoes. Built into a drum brake type electric parking brake device that generates braking force by pressing the brake shoe lining against the inner peripheral surface of the drum that rotates together with the wheel, and connects the tip of the cable and the components of the expansion mechanism A cable connecting device for a drum brake type electric parking brake device,
A connecting tool, a stopper, and a connecting pin;
Of these, the connection tool has a bifurcated shape with a pair of connection plate portions arranged at a distance from each other, and the distal end portion of the cable can be inserted into the proximal end portion from the proximal end surface side. Through holes
The stopper has an outer diameter larger than the inner diameter of the insertion hole, and the insertion hole extends from the insertion hole to the distal end side of the connection tool at the distal end portion of the cable. It is fixed to the protruding part,
The connecting pin includes an input-side attachment hole formed in each of the connection plate portions, and an output-side attachment hole formed in a part of a component of the expansion mechanism disposed between the connection plate portions. A cable connecting device for a drum brake type electric parking brake device, which is inserted and connects the component member and the connecting device so as to transmit a tensile force.   The tip of the dustproof boot made of an elastic material is held and fixed by a restraining ring at a portion near the tip of the middle portion of the cable in a portion separated from the stopper in the length direction of the cable, and the tip of the dustproof boot Between the edge and the stopper, an elastic member that is extendable in the length direction of the cable and has an outer diameter larger than the inner diameter of the insertion hole is disposed in a state of being externally fitted to the cable. Item 4. A cable connecting device for a drum brake type electric parking brake device according to item 1.   The drum brake type according to claim 2, wherein the elastic member is an integral structure with the dustproof boot in which a part of an elastic material constituting the dustproof boot is protruded toward the stopper rather than the restraining ring. Cable connection device for electric parking brake device.

Images