JP2000274465A - Connection device for operation cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform design in a compact manner by a method wherein an amount of displacement of an operation lever, being an operation member, based on a pivotal support part in a direction extending orthogonal to the traction direction of a cable on the semiarcuate groove side is set to a low value. SOLUTION: This connection device comprises an operation lever 30 to connect the terminal fitment 51 of an operation cable 50; a strut 40 pivotally supporting the operation lever 30; and an elastic means 60 to allow the passage of a terminal fitment 51 through rotation in a cable antitraction direction of the operation lever 30 around a pivotal support part and return the operation lever 30 to its original place after the passage of the terminal fitment 51. In this case, when the terminal fitment 51 of the cable 50 is inserted in a strut 40 from the outside of a brake, The wrist pins 52 and 52 of the terminal fitment 51 connected to the semiarcuate groove 33 of the operation lever 30 press the outer peripheral surface (30c) 30d of the operation lever 30 for passage and a collision part 35 with which the tool is collided is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a connecting device for an operating cable, which allows an operating cable to be attached to an operating lever by one-touch operation.

[0002]

2. Description of the Related Art Conventionally, as an operation cable connection device of this type, for example, an example applied to a drum brake has been proposed.
No. 25468.

[0003] Referring to FIG. 11, a pair of brake shoes 12, 13 disposed on a back plate 11 via shoe hold mechanisms 10, 10 are provided between upper opposed ends thereof.
An adjuster device 14 is interposed, and a mechanical actuating device 20 is interposed adjacent to lower opposing ends of a pair of brake shoes 12 and 13 abutting on an anchor 15.

[0006] As shown in FIGS. 12 and 13, a mechanical actuating device 20 includes a brake shoe 12 which is an actuated member on one side.
A brake lever 30 provided with an engagement groove 31 that engages with
The strut 40 is provided with an engagement groove 41 that engages with the brake shoe 13 as the operated member on the other side.

[0005] The strut 40 is made of two plates, and accommodates the brake lever 30 in a space formed from the middle to the right, and is pivotally supported by the pin 21.

[0006] The brake lever 30 is made of two plates, and to the left of the plate is a cross-shaped terminal fitting 5 of an operation cable 50.
The ear shaft 5 is formed on both sides of the main body 51a of the terminal fitting 51 while forming a gap 32 through which the main body 51a of the first terminal 51 is inserted.
2 and a semicircular arc groove 33 is formed. A spring member 60 is attached to a pivot portion between the brake lever 30 and the strut 40, and the urging force of the spring member 60 constantly controls the brake lever 30.
In the operating direction (the direction in which the operation cable 50 is pulled).

When the terminal fitting 51 of the operation cable 50 is inserted into the strut 40 from outside the brake,
The brake lever 30 is connected to the operation cable 5 with the pin 21
The terminal lever 51 is rotated in the anti-traction direction of 0 to allow the terminal fitting 51 to pass therethrough, and after the terminal fitting 51 passes, the brake lever 30 returns to the original position by the urging force of the spring member 60.

[0008]

As shown in FIG. 13, even if the clearance between the pivot portions of the brake lever 30 is small, the semicircular groove 33 of the brake lever 30 has a radius R around the pivot portion.
, The swing amount (displacement amount) of the cable connecting portion becomes large.

In the conventional device, no special measures are taken to suppress the swing amount of the cable connecting portion of the brake lever 30. Therefore, when the cable terminal fitting 51 is inserted,
As shown in the dashed line in FIG. 12 and FIG. 13, the maximum outer portion 51b of the terminal fitting main body 51a passes while slidingly contacting the outer peripheral surface 30c or 30d of the brake lever 30. Therefore, it is necessary to expect a large amount of pushing up of the brake lever 30. Therefore, layout is difficult due to the interference surface with the drum hub or hub bolt, etc., the offset from the brake mounting surface to the center of the brake shoe cannot be reduced, or the total length of the mechanical operating device must be shortened. There was an inconvenience that it was not possible.

The present invention has been made in view of the above points, and an object of the present invention is to reduce the amount of displacement on the semicircular groove side with respect to the pivot portion of the brake lever, which is the operating member, to reduce the size. It is an object of the present invention to provide an operation cable connection device which enables a simple design.

[0011]

The invention according to claim 1 is
An operation lever is formed by providing a semicircular groove at one end where an arc surface formed on a terminal fitting of the operation cable is connected, and an engagement groove at the other end for engaging with a member to be operated on one side. And
At one end of an opposing piece disposed so as to sandwich both sides of the operation lever, an engagement groove for engaging with an actuated member on the other side is provided, and the operation lever is inserted from the intermediate portion to the other. A space is provided, and a strut that pivotally supports the operation lever is formed at the other end, and the terminal fitting is allowed to pass through by turning the operation lever around the pivot in the counter-acting direction. In addition, in the operation cable connection device, the operation lever is configured to return to the original position by the biasing force of the elastic means after the terminal metal fitting has passed. A connection device for an operation cable, wherein the arc surface of the terminal fitting pushes the outer peripheral surface of the operation lever and passes when the terminal is inserted.

According to a second aspect of the present invention, in the first aspect, the operating lever is formed of two plate members, a gap is provided on one semi-circular groove side, and the other pivotal side is closely integrated and integrated, A connection device for an operation cable, wherein a terminal fitting having a cross shape or a T-shape of the operation cable is connected to the semicircular groove.

According to a third aspect of the present invention, in the first aspect, the operation lever is formed of one plate member, and one of the semicircular grooves is connected to a terminal bracket of an operation cable having a hollow square shape. A connection device for an operation cable.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the operating lever has a first lever formed with a semicircular groove, the first lever pivotally supporting the first lever, and a strut. A second lever pivotally supported, wherein the first lever is pivotally supported with respect to the second lever such that the first lever cannot rotate in the pulling direction of the operation cable and can rotate in the anti-traction direction of the operation cable. A connection device for an operation cable.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, one of the engaging grooves of the opposing piece forming the strut is closely integrated with the strut. The space portion of the strut facing one outer end surface is inclined so as to spread in the longitudinal direction as it goes in the anti-traction direction of the operation cable,
It is a connection device for the operation cable.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the operation lever causes the strut to swing in one direction facing the pivot portion of the lever in one semicircular groove side. A connection device for an operation cable, characterized in that the connection device is regulated by:

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a flared expansion portion is formed in an insertion portion of a strut for inserting a terminal fitting of an operation cable. It is a connection device for the operation cable.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, an abutment portion capable of abutting a tool is formed on an outer peripheral surface of the operation lever opposite to the semicircular surface side. A connection device for an operation cable.

[0019]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the description of the present embodiment, parts equivalent to those of the mechanical actuator applied to the drum brake on which the present invention is based are described with the same reference numerals.

<A> Basic Configuration of Mechanical Actuator FIG. 1 is a partial plan view of a drum brake equipped with a mechanical actuator 20, FIG. 2 is a cross-sectional view thereof, FIG. FIG. 4 shows an exploded view thereof.

The mechanical operating device 20 includes an operating lever 30, a strut 40, and a spring member (elastic means) 60 for urging the operating lever 30 in the operating direction. 13 is inserted near the other opposite end.

<B> Operation lever As shown in FIGS. 2 and 3, the operation lever 30 is composed of two crank-shaped plate members 30a and 30b, and a gap 32 for inserting a terminal fitting main body 51a on the left side of the drawing. And semicircular grooves 33, 33 that engage with circular ear shafts 52, 52 projecting in a cross shape on both sides of the terminal fitting main body 51a. In the overlap portion on the right side of the drawing of the operation lever 30 in which the plate members 30a and 30b are brought into close contact with each other, an engagement groove 31 for engaging with the brake shoe 12 on one side is provided.
A pin insertion hole 34 is formed.

A convex or concave abutting portion 35 is formed on the outer peripheral surface of the operating lever 30 opposite to the semicircular grooves 33, 33, and when a tool such as a flathead screwdriver is inserted from outside the brake, The tip can collide.

<C> Strut The strut 40 is an opposing piece 40a, in which two plate members face each other.
An engagement groove 41 for engaging the brake shoe 13 on the other side is formed in the overlapping portion where the left opposing pieces 40a and 40b are closely integrated with each other, and a space is formed from the intermediate portion to the right side in the drawing. 42 are formed. The upper side of the engagement groove 41 in FIGS. 2 to 4 is formed so as to be inclined so that the space 42 extends in the longitudinal direction as it goes outward (upward in the drawing which is the anti-pulling direction of the operation cable 50). ing.
This allows the terminal fitting 51 to be tilted and fitted into the inclined space 42 when the terminal fitting 51 described later is inserted.
Can be reduced, and the overall length of the strut 40 can be shortened. Further, holes 43, 43 for pin insertion are formed on the right side of the opposing pieces 40a, 40b.

A space 4 formed by the opposed pieces 40a, 40b
The operation lever 30 is housed so as to be sandwiched in the pin 2, and the pin 21 penetrates the overlapping portion of the spring member 60, the strut 40, and the operation lever 30, and pivotally supports the lever 30. The retaining ring 22 is attached to the tip of the pin 21 to prevent it from coming out.

At the substantially central portion in the longitudinal direction of the opposing pieces 40a, 40b, local or continuous projections 44, 44 are formed so as to protrude in a direction closer to each other.
The semicircular grooves 33, 33 of the opposite piece 4
The amount of movement (oscillation amount) in the directions 0a and 40b can be kept small.

The protrusion for restricting the swing of the operation lever 30 is not limited to the strut 40 side, but may be provided on the operation lever 30 side. In this embodiment, as the means for suppressing the swing of the operation lever 30 on the side of the semicircular grooves 33, 33 with respect to the pivot portion, the projections 44, 44, which are easy to secure the processing accuracy, are exemplified. In other words, the position of the semicircular grooves 33, 33 of the operation lever 30 in the direction of the facing pieces 40a, 40b may be determined.

The terminal fitting 5 of each of the opposed pieces 40a, 40b
On the side where 1 is inserted, flared expansion portions 45 and 45 are formed to facilitate insertion of the terminal fitting 51.

<D> Spring Member A spring member 60 illustrated in FIGS. 2 and 4 has a base 61 bent in a U-shape, which is mounted on a pivotal support of a strut 40, and a base 6.
The pin 21 is inserted into the hole 62 formed on the side surface of the first and attached. The distal end of the curved tongue piece 63 integrally formed from the base 61 is lightly elastically in contact with the left end face of the overlapping portion of the operation lever 30. The operation cable 5 is attached to the curved tongue 63.
At the time of connection of 0, the operation lever 30 rotates in the cable anti-pulling direction around the pin 21 as a fulcrum to allow the terminal fitting 51 to pass therethrough,
A biasing force is set so that the operation lever 30 can return to the original position after passing through the terminal fitting 51.

The elastic means for urging the operation lever 30 in the cable index direction may be constituted by a wire spring (not shown) instead of the leaf spring 60.

Also, instead of the spring member 60, as shown in FIG.
The brake lever 30 may be pulled back by the elasticity of the dust boot 56 attached to the (side).

<E> Terminal Fitting The terminal fitting 51 of the operation cable 50 illustrated in FIG. 4 is formed by forging into a plate shape except for the rear end portion of the round bar, and then the tip end portion is made substantially circular and the intermediate portion is formed. And the terminal fitting body 51
a is formed, and a circular ear shaft 52 is formed in a circular hole provided at the center of the circular portion so as to protrude equally from both plate surfaces (possible by press-fitting of a circular pin), and a cylindrical terminal fitting is formed. The inner cable 53 is inserted into the rear end of the main body 51a and swaged.

The terminal fitting main body 51a may be an integrally molded product made of die-cast aluminum or the like. In this case, the inner cable 53 may be cast at the same time.

[0034]

Next, a method for connecting and disconnecting the operation cable will be described. <A> Connection method The operation cable 50 is inserted from outside the brake, and the terminal fitting 51 is inserted into the extension portion 45 of the strut 40.

For example, as described above, the semicircular grooves 33, 33 of the operating lever 30 are formed by the projections 44, 44 provided on the strut 40 so that the opposing pieces 40a, 40b of the strut 40 are formed.
The amount of movement in the direction is regulated very small. Therefore, as shown by the one-dot chain line in FIG. 2, the arc surfaces 52 a of the ear shafts 52, 52 protruding from the terminal fitting 51 abut on the outer peripheral surfaces 30 c, 30 d of the operation lever 30 and pass while pushing. Become. At this time, the opposite side of the terminal fitting 51 is the main body 5.
1a is the corresponding strut 4
It slides while being supported by the narrow portion of the space 42 of zero.

At this time, the maximum outer portion 51 of the terminal fitting 51
b compared with a conventional device (see FIGS. 12 and 13) in which the operating lever (brake lever) 30 is pushed and passed.
The push-up amount of the operation lever 30 centered on 1 is reduced. In other words, the pushing amount of the terminal fitting 51 can be small.

When the ear shafts 52, 52 of the terminal fitting 51 begin to push the outer peripheral surfaces 30c, 30d on the distal end side of the operation lever 30, the largest outer portion 51b on the opposite side of the fitting 51 is formed in the space 42 of the strut 40. Is displaced in a direction away from the operation lever 30 along the slope forming the above, so that the push-up amount of the operation lever 30 can be further reduced and the overall length of the strut 40 can be shortened.

When the ear shafts 52 of the terminal fitting 51 get over the distal end of the operating lever 30, the operating lever 30 returns to its original position by the urging force of the spring member 60.

<B> Disconnection The generally oval cable bracket 16 shown in FIG. 2 is removed, the inner cable 53 is pushed back, and the ear shafts 52, 52 of the terminal fitting 51 are connected to the semicircular grooves 33, 33 of the operation lever 30.
After being separated from the inner cable 53, the inner cable 53 is shifted to the left in the drawing. Next, the inner cable 53 is pulled out of the brake while the tip of a tool such as a flathead screwdriver is pressed against the abutting portion 35 of the operation lever 30.

[0040]

Embodiment 2 Hereinafter, another embodiment will be described. In the description, the same parts as those in the above-described first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, the case where the terminal fitting 51 has a cross shape when viewed from the side thereof has been described. However, as shown in FIG. It may be a T-shape provided to be deviated in the part. In this example, since the terminal fitting 51 can be integrally formed by die casting of aluminum or the like, the processing is easy.

[0042]

Third Embodiment FIG. 7 shows another embodiment in which a bent portion 64 at the tip of a curved tongue piece 63 extending from a spring member 60 is fitted into the branched gap 32 between the plate members 30a and 30b of the operation lever 30. Is shown. The opposing surfaces of the plate members 30 a and 30 b abut against the side edge surfaces of the bending portion 64, and the semicircular groove 33 of the operation lever 30 is formed.
The swing with respect to the pivot portion on the side can be suppressed to a small degree, and substantially the same operation and effect as those of the projections 44 and 44 of the strut 40 described above are exerted.

[0043]

Fourth Embodiment FIG. 8 shows another embodiment in which the operation lever 30 is formed of a single plate. In the case of this example, the outer shape of the terminal fitting body 51a has a rectangular shape, the insertion hole 54 is formed in the center of the terminal fitting 51, and a portion that comes into contact with the semi-arc groove 33 of the operation lever 30 is a semi-arc surface 55.
The width of the terminal fitting body 51a is set to be slightly smaller than the width of the space 42 of the opposing pieces 40a, 40b of the strut 40.

[0044]

Fifth Embodiment FIG. 9 and FIG.
Another embodiment in which 0 is divided into two types is shown. In this example, a first lever 36 having a semi-circular groove 33 connected to the terminal fitting 51, and the first lever 36 is pivotally supported by the pin 23 so as to be rotatable only in the anti-pulling direction of the operation cable 50,
A second engagement groove 31 is formed to be engaged with the brake shoe 12 on one side, and is rotatably supported by the strut 40.
The operation lever 30 is constituted by the lever 37.

The first lever 36 comes into contact with a stopper 37a provided on the second lever 37 and turns integrally with the pin 21 as a fulcrum in the pulling direction of the operation cable 50. Further, since the second lever 37 is in contact with the stopper 46 laid over the pivot portion of the strut 40 to restrict the rotation of the operation cable 50 in the anti-pulling direction, when the terminal fitting 51 of the operation cable 50 is inserted. Only the first lever 36 rotates and passes.

If the type of the present embodiment in which the operation lever 30 is divided into two parts is provided with protrusions 44 and 44 and means for coining which are means for restricting the swing of the semicircular groove 33 of the operation lever 30, the operation cable 50 can be formed. When inserting the terminal fitting 51,
As in the above-described embodiment, the first ear shaft 52
The outer peripheral surfaces 30c and 30d of the lever 36 can be pushed. At this time, since the first lever 36 is pushed up by the pin 23 as a fulcrum, the pushing up amount is smaller than in the above-described embodiment.

[0047]

According to the present invention, the following effects can be obtained as apparent from the above-described configuration.

<A> Even if there is some backlash in the pivot portion of the operation lever, the amount of displacement of the semicircular groove portion of the operation lever in the direction perpendicular to the cable index direction is reduced, so that the ear protruding from the terminal fitting body. The circular arc surface of the shaft can be reliably brought into contact with the outer peripheral surface of the operation lever and pushed. Therefore, the push-up amount of the operation lever can be set small, so that the problem of interference with the drum hub or hub bolt due to the layout can be solved, and the offset from the brake mounting surface to the center of the brake shoe can be reduced.

<B> In particular, if the space portion of the strut facing the outer end surface of the operation lever on the semicircular groove side is inclined so as to expand in the longitudinal direction toward the anti-pulling direction of the operation cable, the operation can be performed. When the terminal fitting of the cable is inserted, the fitting can be tilted and fitted into the inclined space, so that the total length of the mechanical actuator can be shortened and a compact design can be realized.

<C> The brake lever can be applied to a type in which the brake lever is divided into two parts, so that the versatility is enhanced.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a drum brake equipped with a mechanical actuator according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of a mechanical actuator.

FIG. 4 is an exploded view of a mechanical actuator.

FIG. 5 is a cross-sectional view of a mechanical actuator using a dust boot as an elastic means.

FIG. 6 is a perspective view of a T-shaped terminal fitting.

FIG. 7 is an explanatory view according to another embodiment in which a curved tongue is fitted in a space of an operation lever.

FIG. 8 is an explanatory view of an operation cable connection device according to another embodiment in which an operation lever is configured by one sheet material;
(A) is a plan view with a part thereof omitted, (B) is a side view of the hollow square terminal fitting, and (C) is a cross-sectional view taken along line CC of (B).

FIG. 9 is an explanatory view according to another embodiment in which the operation lever is applied to a type in which the operation lever is divided into two parts, and is a cross-sectional view of a mechanical actuator in which a part is omitted.

FIG. 10 is a perspective view of the mechanical actuator.

FIG. 11 is a plan view of a drum brake on which the present invention is based.

12 is a sectional view taken along the line XII-XII of FIG.

FIG. 13 is a plan view of the mechanical actuator when the operation cable is connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shoe hold mechanism 11 Back plate 12, 13 Brake shoe 14 Adjuster device 15 Anchor 16 Cable bracket 20 Mechanical actuator 21 Pin 22 Retaining ring 30 Operating lever (brake lever) 30a, 30b Plate 30c, 30d Outer peripheral surface of operating lever 31 Engaging groove 32 gap 33, 33 semicircular groove 34 hole 35 abutting portion 36 first lever 37 second lever 37a stopper 40 strut 40a, 40b facing piece 41 engaging groove 42 space 43, 43 hole 44, 44 protrusion 45, 45 Expansion part 46 Stopper 50 Operation cable 51 Terminal fitting 51a Terminal fitting main body 51b Maximum outer diameter part 52, 52 Ear shaft 52a Arc surface of ear shaft 53 Inner cable 54 Insertion opening 55 Semi-arc surface 56 Dust boot 60 Spring member (elastic means) 6 Base 62 hole 63 curved tongue 64 bent portion

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[Procedure amendment]

[Submission date] April 1, 1999 (1999.4.1)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG. 11

FIG. 13

FIG. ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission Date] January 11, 2000 (2000.1.1)
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Operation cable connection device

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a connecting device for an operating cable, which allows an operating cable to be attached to an operating lever by one-touch operation.

[0002]

2. Description of the Related Art Conventionally, as an operation cable connection device of this type, for example, an example applied to a drum brake has been proposed.
No. 25468.

Referring to FIG. 10, a pair of brake shoes 12, 13 disposed on a back plate 11 via shoe hold mechanisms 10, 10 are provided between upper opposed ends of the shoes.
An adjuster device 14 is interposed, and a mechanical actuating device 20 is interposed adjacent to lower opposing ends of a pair of brake shoes 12 and 13 abutting on an anchor 15.

As shown in FIGS. 11 and 12, a mechanical operating device 20 includes a brake shoe 12 which is a member to be operated on one side.
And a strut 40 provided with an engaging groove 41 for engaging with the brake shoe 13 as the actuated member on the other side.

[0005] The strut 40 is made of two plate members, and the operation lever 3 is provided in a space formed from the middle to the right.
0 is accommodated and pivotally supported by a pin 21.

The operation lever 30 is made of two plates, and a left side thereof is formed with a gap 32 for inserting a cross-shaped terminal fitting main body 51a of the operation cable 50, and is formed on both sides of the terminal fitting main body 51a. A semicircular groove 33 that engages with the protruding ear shaft 52 is formed. A spring member 60 is attached to a pivot portion of the operation lever 30 and the strut 40, and the spring member 6
The urging force of 0 always acts on the operation lever 30 in the operating direction (the direction in which the operation cable 50 is pulled).

When the terminal fitting 51 of the operation cable 50 is inserted into the strut 40 from outside the brake,
The operation lever 30 pivots about the pin 21 in the anti-traction direction of the operation cable 50 to allow the terminal fitting 51 to pass therethrough, and after the terminal fitting 51 passes, the operation lever 30 is returned to its original position by the urging force of the spring member 60. It is configured to return to.

[0008]

As shown in FIG. 12, the semicircular groove 33 of the operation lever 30 rotates at the radius R around the pivot even if the clearance between the pivots of the operation lever 30 is small. The swinging amount (displacement amount) of the cable connecting portion becomes large.

In the conventional apparatus, no special measures are taken to reduce the swing amount of the cable connecting portion of the operation lever 30. Therefore, when the operation cable terminal fitting 51 is inserted,
As shown in the dashed-dotted line in FIG. 11 and FIG. 12, the maximum outer portion 51b of the terminal fitting main body 51a passes while sliding on the outer peripheral surface 30c or 30d of the operation lever 30. Therefore, it is necessary to allow for a large amount of push-up of the operation lever 30. Therefore, the layout is difficult due to the interference surface with the drum hub or the hub bolt, the offset from the brake mounting surface to the brake shoe center cannot be reduced, or the overall length of the mechanical operating device is reduced. There was an inconvenience that they could not.

The present invention has been made in view of the above points, and an object of the present invention is to reduce the amount of displacement of the operation lever, which is the operation member, on the side of the semicircular groove relative to the pivot portion of the operation lever. It is an object of the present invention to provide an operation cable connection device which enables a simple design.

[0011]

The invention according to claim 1 is
An operation lever is formed by providing a semicircular groove at one end where an arc surface formed on a terminal fitting of the operation cable is connected, and an engagement groove at the other end for engaging with a member to be operated on one side. And
At one end of an opposing piece disposed so as to sandwich both sides of the operation lever, an engagement groove for engaging with an actuated member on the other side is provided, and the operation lever is inserted from the intermediate portion to the other. A space is provided, and a strut that pivotally supports the operation lever is formed at the other end, and the terminal fitting is allowed to pass through by turning the operation lever around the pivot in the counter-acting direction. In addition, in the operation cable connection device, the operation lever is configured to return to the original position by the biasing force of the elastic means after the terminal metal fitting has passed. When inserting the operation lever, the arc surface of the terminal fitting connected to the semicircular groove of the operation lever is configured to push the outer peripheral surface of the operation lever to pass therethrough, and the operation lever An outer peripheral surface opposite to the semicircular surface,
A connection device for an operation cable, wherein a contact portion capable of hitting a tool is formed.

According to a second aspect of the present invention, in the first aspect, the operating lever is formed of two plate members, a gap is provided on one semi-circular groove side, and the other pivotal side is closely integrated and integrated, A connection device for an operation cable, wherein a terminal fitting having a cross shape or a T-shape of the operation cable is connected to the semicircular groove.

According to a third aspect of the present invention, in the first or second aspect, the operation lever has a first arc-shaped groove.
A lever, and a second lever pivotally supported by the strut and pivotally supported by the strut, wherein the first lever cannot rotate with respect to the second lever in the pulling direction of the operation cable, and does not operate. A connection device for an operation cable, which is pivotally supported so as to be rotatable in an anti-pulling direction of the cable.

According to a fourth aspect of the present invention, in any one of the first to third aspects, one of the engagement grooves of the opposing piece forming the strut is closely integrated with one of the operation levers. A space portion of the strut facing the outer end face of the operating cable is inclined so as to expand in the longitudinal direction as it goes in the anti-pulling direction of the operating cable.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the operation lever causes the strut to swing in one direction facing the pivotal support portion of the lever in the one semicircular groove side. A connection device for an operation cable, characterized in that the connection device is regulated by:

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, a flared expansion portion is formed in an insertion portion of a strut for inserting a terminal fitting of an operation cable. It is a connection device for the operation cable.

[0017]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the description of the present embodiment, parts equivalent to those of the mechanical actuator applied to the drum brake on which the present invention is based are described with the same reference numerals.

<A> Basic Configuration of Mechanical Actuator FIG. 1 is a partial plan view of a drum brake equipped with a mechanical actuator 20, FIG. 2 is a cross-sectional view thereof, FIG. FIG. 4 shows an exploded view thereof.

The mechanical actuating device 20 includes an operating lever 30, a strut 40, and a spring member (elastic means) 60 for urging the operating lever 30 in the operating direction. 13 is inserted near the other opposite end.

<B> Operation lever As shown in FIGS. 2 and 3, the operation lever 30 is composed of two crank-shaped plate members 30a and 30b, and a gap 32 for inserting a terminal fitting main body 51a on the left side of the drawing. And semicircular grooves 33, 33 that engage with circular ear shafts 52, 52 projecting in a cross shape on both sides of the terminal fitting main body 51a. In the overlap portion on the right side of the drawing of the operation lever 30 in which the plate members 30a and 30b are brought into close contact with each other, an engagement groove 31 for engaging with the brake shoe 12 on one side is provided.
A pin insertion hole 34 is formed.

A convex or concave abutting portion 35 is formed on the outer peripheral surface of the operation lever 30 opposite to the semicircular grooves 33, 33, and when a tool such as a flathead screwdriver is inserted from outside the brake, The tip can collide.

<C> Strut The strut 40 is a facing piece 40a in which two plate members face each other.
An engagement groove 41 for engaging the brake shoe 13 on the other side is formed in the overlapping portion where the left opposing pieces 40a and 40b are closely integrated with each other, and a space is formed from the intermediate portion to the right side in the drawing. 42 are formed. The upper side of the engagement groove 41 in FIGS. 2 to 4 is formed so as to be inclined so that the space 42 extends in the longitudinal direction as it goes outward (upward in the drawing which is the anti-pulling direction of the operation cable 50). ing.
This allows the terminal fitting 51 to be tilted and fitted into the inclined space 42 when the terminal fitting 51 described later is inserted.
Can be reduced, and the overall length of the strut 40 can be shortened. Further, holes 43, 43 for pin insertion are formed on the right side of the opposing pieces 40a, 40b.

A space 4 formed by the opposed pieces 40a, 40b
The operation lever 30 is housed so as to be sandwiched in the pin 2, and the pin 21 penetrates the overlapping portion of the spring member 60, the strut 40, and the operation lever 30, and pivotally supports the lever 30. The retaining ring 22 is attached to the tip of the pin 21 to prevent it from coming out.

At the substantially central portion in the longitudinal direction of the opposing pieces 40a, 40b, projections 44, 44 which are locally or continuously raised in a direction closer to each other are formed.
The amount (oscillation amount) in which the 0 semicircular grooves 33, 33 move in the direction of the opposing pieces 40a, 40b with the pivot portion as a fulcrum can be suppressed.

The protrusion for restricting the swing of the operation lever 30 is not limited to the strut 40 side, but may be provided on the operation lever 30 side. In this embodiment, as the means for suppressing the swing of the operation lever 30 on the side of the semicircular grooves 33, 33 with respect to the pivot portion, the projections 44, 44, which are easy to secure the processing accuracy, are exemplified. In other words, the position of the semicircular grooves 33, 33 of the operation lever 30 in the direction of the facing pieces 40a, 40b may be determined.

The terminal fitting 5 of each of the facing pieces 40a, 40b
On the side where 1 is inserted, flared expansion portions 45 and 45 are formed to facilitate insertion of the terminal fitting 51.

<D> Spring Member A spring member 60 illustrated in FIGS. 2 and 4 has a base 61 bent in a U-shape, which is provided on a pivotal support of the strut 40, and a base 6.
The pin 21 is inserted into the hole 62 formed on the side surface of the first and attached. The distal end of the curved tongue piece 63 integrally formed from the base 61 is lightly elastically in contact with the left end face of the overlapping portion of the operation lever 30. The operation cable 5 is attached to the curved tongue 63.
At the time of connection of 0, the operation lever 30 rotates in the cable anti-pulling direction around the pin 21 as a fulcrum to allow the terminal fitting 51 to pass therethrough,
A biasing force is set so that the operation lever 30 can return to the original position after passing through the terminal fitting 51.

The elastic means for urging the operation lever 30 in the cable index direction may be constituted by a wire spring (not shown) instead of a leaf spring.

Instead of the spring member 60, as shown in FIG. 5, the operating lever 30 may be pulled back by the resilience of the dust boot 56 attached to the input side (non-mechanical actuator side) of the operating cable 50. .

<E> Terminal fitting The terminal fitting 51 of the operation cable 50 illustrated in FIG. 4 is formed by forging into a plate shape leaving the rear end portion of the round bar, and then the end portion is made substantially circular and the intermediate portion is formed. And the terminal fitting body 51
a is formed, and a circular ear shaft 52 is formed in a circular hole provided at the center of the circular portion so as to protrude equally from both plate surfaces (possible by press-fitting of a circular pin), and a cylindrical terminal fitting is formed. The inner cable 53 is inserted into the rear end of the main body 51a and swaged.

The terminal fitting main body 51a may be an integrally molded product made of die-cast aluminum or the like. In this case, the inner cable 53 may be cast at the same time.

[0032]

Next, a method for connecting and disconnecting the operation cable will be described. <A> Connection method The operation cable 50 is inserted from outside the brake, and the terminal fitting 51 is inserted into the extension portion 45 of the strut 40.

For example, as described above, the semicircular grooves 33, 33 of the operating lever 30 are formed by the projections 44, 44 provided on the strut 40 so that the opposing pieces 40a, 40b of the strut 40 are formed.
The amount of movement in the direction is regulated very small. Therefore, as shown by the one-dot chain line in FIG. 2, the arc surfaces 52 a of the ear shafts 52, 52 protruding from the terminal fitting 51 abut on the outer peripheral surfaces 30 c, 30 d of the operation lever 30 and pass while pushing. Become. At this time, the opposite side of the terminal fitting 51 slides while the largest outer portion 51b of the terminal fitting main body 51a is supported by the corresponding narrow portion of the space 42 of the strut 40.

At this time, the maximum outer portion 51 of the terminal fitting 51
The conventional device (b) pushes the operating lever 30 to pass through (FIG. 1)
1, see FIG. 12), the push-up amount of the operation lever 30 about the pin 21 becomes smaller. In other words, the pushing amount of the terminal fitting 51 can be small.

When the ear shafts 52, 52 of the terminal fitting 51 begin to push the outer peripheral surfaces 30c, 30d on the distal end side of the operation lever 30, the largest outermost portion 51b on the opposite side of the fitting 51 becomes the space 42 of the strut 40. Is displaced in a direction away from the operation lever 30 along the slope forming the above, so that the push-up amount of the operation lever 30 can be further reduced and the entire length of the strut 40 can be shortened.

When the ear shafts 52, 52 of the terminal fitting 51 get over the distal end of the operating lever 30, the operating lever 30 returns to the original position by the urging force of the spring member 60.

<B> Removal Method The substantially oval cable bracket 16 shown in FIG. 2 is removed, and the inner cable 53 is pushed back to connect the ear shafts 52, 52 of the terminal fitting 51 to the semicircular grooves 33, 33 of the operation lever 30.
After being separated from the inner cable 53, the inner cable 53 is shifted to the left in the drawing. Next, the inner cable 53 is pulled out of the brake while the tip of a tool such as a flathead screwdriver is pressed against the abutting portion 35 of the operation lever 30.

[0038]

Embodiment 2 Hereinafter, another embodiment will be described. In the description, the same parts as those in the above-described first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, the case where the terminal fitting 51 has a cross shape when viewed from the side thereof has been described. However, as shown in FIG. It may be a T-shape provided to be deviated in the part. In this example, since the terminal fitting 51 can be integrally formed by die casting of aluminum or the like, the processing is easy.

[0040]

Third Embodiment FIG. 7 shows that the bending portion 64 at the tip of the curved tongue 63 extending from the spring member 60 is
Another embodiment is shown in which the plate members 30a and 30b are fitted into the branched gap 32. The opposing surfaces of the plate members 30a, 30b abut against the side edge surfaces of the bending portion 64, and the semicircular groove 3 of the operation lever 30
The swing to the pivot on the 3 side can be kept small,
It has substantially the same effect as the protrusions 44 of the strut 40 described above.

[0041]

Embodiment 4 FIGS. 8 and 9 show an operation lever 30.
Another embodiment in which is applied to a type obtained by dividing into two.
In this example, a first lever 36 having a semicircular groove 33 connected to a terminal fitting 51 is provided.
The second lever 37 pivotally supported by the pin 23 so as to be rotatable only in the anti-pulling direction of 0, the engagement groove 31 to be engaged with the brake shoe 12 on one side, and rotatably supported by the strut 40. Thus, the operation lever 30 is constituted.

The first lever 36 comes into contact with a stopper 37a provided on the second lever 37 and rotates integrally with the pin 21 as a fulcrum in the pulling direction of the operation cable 50. Further, since the second lever 37 is in contact with the stopper 46 laid over the pivot portion of the strut 40 to restrict the rotation of the operation cable 50 in the anti-pulling direction, when the terminal fitting 51 of the operation cable 50 is inserted. Only the first lever 36 rotates and passes.

If the type of the present embodiment in which the operation lever 30 is divided into two parts is provided with protrusions 44 and 44 and means for coining which are means for restricting the swing of the semicircular groove 33 of the operation lever 30, the operation cable 50 can be formed. When inserting the terminal fitting 51,
As in the above-described embodiment, the first ear shaft 52
The outer peripheral surfaces 30c and 30d of the lever 36 can be pushed. At this time, since the first lever 36 is pushed up by the pin 23 as a fulcrum, the pushing up amount is smaller than in the above-described embodiment.

[0044]

According to the present invention, the following effects can be obtained as apparent from the above-described configuration.

<A> Even if there is some backlash in the pivot portion of the operation lever, the amount of displacement of the semicircular groove portion of the operation lever in the direction orthogonal to the cable index direction is reduced, so that the ear protruding from the terminal fitting body. The circular arc surface of the shaft can be reliably brought into contact with the outer peripheral surface of the operation lever and pushed. Therefore, the push-up amount of the operation lever can be set small, so that the problem of interference with the drum hub or hub bolt due to the layout can be solved, and the offset from the brake mounting surface to the center of the brake shoe can be reduced.

<B> In particular, if the space portion of the strut facing the outer end surface of the operation lever on the semicircular groove side is inclined so as to expand in the longitudinal direction toward the anti-pulling direction of the operation cable, the operation can be performed. When the terminal fitting of the cable is inserted, the fitting can be tilted and fitted into the inclined space, so that the total length of the mechanical actuator can be shortened and a compact design can be realized.

<C> The operation lever can also be applied to a type in which the operation lever is divided into two parts, which is versatile.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a drum brake equipped with a mechanical actuator according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of a mechanical actuator.

FIG. 4 is an exploded view of a mechanical actuator.

FIG. 5 is a cross-sectional view of a mechanical actuator using a dust boot as an elastic means.

FIG. 6 is a perspective view of a T-shaped terminal fitting.

FIG. 7 is an explanatory view according to another embodiment in which a curved tongue is fitted in a space of an operation lever.

FIG. 8 is an explanatory view according to another embodiment in which the operation lever is applied to a type in which the operation lever is divided into two parts, and is a cross-sectional view of a mechanical actuator in which a part is omitted.

FIG. 9 is a perspective view of the mechanical actuator.

FIG. 10 is a plan view of a drum brake on which the present invention is based.

11 is a sectional view taken along line XI-XI in FIG.

FIG. 12 is a plan view of the mechanical actuator when the operation cable is connected.

[Description of Signs] 10 Shoe hold mechanism 11 Back plate 12, 13 Brake shoe 14 Adjuster device 15 Anchor 16 Cable bracket 20 Mechanical actuator 21 Pin 22 Retaining ring 23 Pin 30 Operating lever 30a, 30b Plate 30c, 30d Operating lever Outer peripheral surface 31 Engagement groove 32 Gap 33, 33 Semi-circular groove 34 Hole 35 Impact part 36 First lever 37 Second lever 37a Stopper 40 Strut 40a, 40b Opposing piece 41 Engagement groove 42 Space 43, 43 hole 44, 44 Projection 45, 45 Expansion part 46 Stopper 50 Operation cable 51 Terminal fitting 51a Terminal fitting main body 51b Maximum outer diameter part 52, 52 Ear shaft 52a Arc surface of ear shaft 53 Inner cable 56 Dust boot 60 Spring member (elastic means) 61 Base 62 hole 63 Curved tongue piece 64 Bend

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Claims (8)

[Claims] 1. A semi-circular groove for connecting an arc surface formed on a terminal fitting of an operation cable is provided at one end, and an engaging groove is provided at the other end for engaging with a member to be operated on one side. To form an operating lever, and at one end of an opposing piece disposed so as to sandwich both sides of the operating lever, an engaging groove for engaging with the actuated member on the other side is provided. A space for inserting the operation lever is provided, and a strut that pivotally supports the operation lever is formed at the other end,
The terminal lever is allowed to pass by rotating the operation lever in the counter-acting direction around the pivot, and the operation lever is returned to the original position by the biasing force of the elastic means after the terminal metal has passed. When the terminal fitting of the operation cable is inserted from the outside of the brake into the space of the strut, the arc surface of the terminal fitting pushes the outer peripheral surface of the operation lever and passes therethrough. A connection device for an operation cable, which is configured as follows. 2. The semi-circular groove according to claim 1, wherein the operating lever is formed of two plate members, a gap is provided on one semi-circular groove side, and the other pivot side is tightly integrated with the semi-circular groove. A connection device for an operation cable, wherein a terminal fitting having a cross-shaped or T-shaped cable is connected. 3. The operation according to claim 1, wherein the operation lever is made of one plate member, and one of the semicircular grooves is connected to a terminal bracket of an operation cable having a hollow square shape. Cable connection device. 4. A first lever according to claim 1, wherein the operation lever has a semicircular groove, and a second lever pivotally supporting the first lever and pivotally supported by the strut. The first lever is pivotally supported with respect to the second lever such that the first lever cannot rotate in the pulling direction of the operation cable and can rotate in the anti-traction direction of the operation cable. Cable connection device. 5. An operation lever according to claim 1, wherein one of the engagement grooves of the opposing piece forming the strut is closely integrated with one another, and faces one outer end surface of the operation lever. A connection device for an operation cable, characterized in that the space portion of the strut is inclined so as to extend in the longitudinal direction as it goes in the direction of anti-traction of the operation cable. 6. The operation lever according to claim 1, wherein the swing of the strut in a direction opposite to the pivotal support portion of the lever in one side is restricted by one semicircular groove. A connection device for operating cables. 7. The connection of an operation cable according to claim 1, wherein a flared extension is formed in an insertion portion of a strut for inserting a terminal fitting of the operation cable. apparatus. 8. The operating lever according to claim 1, wherein an abutting portion capable of abutting a tool is formed on an outer peripheral surface of the operation lever opposite to the semicircular surface side. To connect the operation cable.