KR100813758B1 - Mechanical brake actuator - Google Patents

Abstract

It is an object of the present invention to provide a mechanical brake actuating device for minimizing the device and minimizing the cost of components.

The present invention engages with one brake shoe 12, connects it with a connecting leg 23a, and has a strut 23 having an opposing piece 23b, and a plate-like operation for engaging the other brake shoe 13. The lever 24 is provided, the base 24a of the operating lever 24 is accommodated in the space 23c between the opposing pieces of the strut 23, and the base end thereof is pivotally rotatably supported. In the mechanical brake operating device which operates by pulling the inner cable 41 of the brake cable 40 connected to the free end 24e of the operation lever 24 with the connecting pin 43, the strut 23 The clip 30 which restricts the rotation to the anti-cable pull direction of the operation lever 24 is attached to the connection leg part 23a of this.

brake

Description

Mechanical brake actuator

1 is a plan view showing an example of a drum brake equipped with a mechanical brake operating device according to the first embodiment.

2 is a cross-sectional view of II-II of FIG.

3 is an exploded perspective view of the mechanical brake operating device according to the first embodiment.

Figure 4 is a perspective view of the connecting leg portion of the strut omitted a part.

5 is a perspective view of a clip which partly broke according to the first embodiment;

Fig. 6 is a view showing both a configuration explanatory diagram and an operation explanatory diagram of the mechanical brake operating device according to the first embodiment, wherein the free end of the operating lever is exposed from the opening in the space of the strut toward the half cable pull direction.

Fig. 7 is a view showing both a configuration explanatory diagram and an operation explanatory diagram of the mechanical brake operating device according to the first embodiment, wherein the free end of the operating lever is exposed from the opening in the space of the strut toward the half cable pull direction.

Fig. 8 is an explanatory view of the operation of the mechanical operating mechanism according to the first embodiment, showing an enlarged view showing a state in which rotation of the operation lever in the half-cable traction direction is disabled by the clip;

9 is a perspective view of a clip according to a second embodiment.

Fig. 10 is a view showing both a configuration explanatory diagram and an operation explanatory diagram of the mechanical brake operating device according to the second embodiment, wherein an enlarged view showing a state in which the free end of the operating lever is exposed from the opening of the space of the strut toward the half cable pull direction.

Fig. 11 is an explanatory view of the operation of the mechanical actuation mechanism according to the second embodiment, showing an enlarged view showing a state in which rotation of the operation lever in the half-cable traction direction is disabled by the clip;

Fig. 12 is a view showing both the configuration explanatory diagram and the operation explanatory diagram of the mechanical brake operating device according to the third embodiment, showing an enlarged state in which the free end of the operating lever is exposed from the opening in the space of the strut toward the half cable pull direction.

Fig. 13 is an explanatory view of the operation of the mechanical actuation mechanism according to the third embodiment, showing an enlarged view showing a state in which rotation of the operation lever in the half-cable traction direction is disabled by the clip;

FIG. 14 is a view showing both a configuration explanatory diagram and an operational explanatory diagram of a mechanical brake operating device according to a modification of the third embodiment, wherein an enlarged view showing a state in which rotation of the operating lever in the half-cable traction direction is disabled by a clip; FIG. .

Fig. 15 is a view showing both the configuration explanatory diagram and the operation explanatory diagram of the mechanical brake operating device according to the fourth embodiment, showing an enlarged view showing a state in which rotation of the operation lever in the half-cable traction direction is disabled.

16 is an explanatory view of the mechanical brake actuation device according to the fifth embodiment, in which the free end of the operating lever is exposed from the opening in the space of the strut toward the half cable pull direction;

Fig. 17 is an explanatory view of the operation of the mechanical actuation mechanism according to the fifth embodiment, showing an enlarged view showing a state in which rotation of the operation lever in the half-cable traction direction is disabled by the clip;

FIG. 18 is a view showing both a configuration explanatory diagram and an operation explanatory diagram of the mechanical brake operating device according to the modification of the fifth embodiment, showing a state where the free end of the operating lever is exposed from the opening of the space of the strut toward the half cable pull direction. Magnified view.

19 is an explanatory view of the configuration of the mechanical brake operation device according to the modification of the fifth embodiment and an explanatory view of the operation, wherein an enlarged view showing a state in which rotation of the operation lever in the half-cable traction direction is disabled by a clip; .

<Explanation of symbols for the main parts of the drawings>

DESCRIPTION OF SYMBOLS 10 Floating part of a vehicle body 11 Backplate 12 and 13 Brake shoe

16: Anchor 16a: Standing part 19: Shoe return spring

20, 21: Mounting bolt 22: Mechanical mechanism

23: strut 23a: connecting leg 23b: opposite side

23c: wide space 23d: narrow space 23e: shoe connection groove

23f: pivot support 23g: protrusion 23i: protrusion

23k: groove 24: operating lever 24a: base

24b: Shoe connecting groove 24c: (one) protrusion 24d: pivot support ball

24e: Free end 24f: Brake cable connection hole

24h: trough 25: t pivot support pin 26: stop washer

30, 50, 60, 780: clips 31, 32, 51, 52: stenosis

31a: positioning hole 32a: connecting projection 32b, 52b, 62b: positioning part

51a: 1st positioning hole 51b: 2nd positioning hole 51c: guide piece

61, 62: mounting piece 61d: bending portion 61e: positioning projection

62c: bending part 71, 72: mounting piece

71d: Bending part (first bending part) 71e: Positioning part

71 f: second bending part 72 d: positioning hole 73: connection part

40: brake cable 41: inner cable 42: cable end

42a: Donation 42b: Home 42c: Connector

43: connecting pin 44: outer casing 44a: casing cap

45: guide pipe 46: retaining ring

Japanese Patent Application Laid-Open No. 2001-349360 (Figs. 2-8 on pages 4 and 5)

The present invention relates to a mechanical brake actuating device that is easy to prevent the breakaway of the brake cable.

This kind of brake actuating device is provided with a plate-shaped operation lever, a strut which accommodates the operation lever therein and pivots freely, and a mechanical actuation mechanism consisting of a pivot support pin. Is arranged between a pair of brake shoes, and the lever and the strut rotate relative to each other by traction operation of the brake cable connected to the control lever, and both mechanisms extend in opposite directions.

' 형으로 굴곡하여 형성한 클립을 스트럿에 외장하여 장착하고, 클립의 양측 내면에 형성한 움푹한 부분을 스트럿의 양측 외면에 형성한 돌기에 결합시켜서, 이 클립에 의하여 조작 레버를 스트럿의 공간 내에 위치 결정하는 구성으로 되어 있다. (특허문헌 1의 단락 0015, 0016, 도 2-4참조)Then, the connecting pin is connected to the brake cable connecting hole of the operating lever that protrudes from the opening of the strut, and the brake cable is connected to the operating lever.

'The clip formed by bending in a shape is mounted on the strut by attaching it to the strut, and the recessed portions formed on the inner surface of both sides of the clip are joined to the protrusions formed on the outer surface of the strut. Positioning is configured. (See paragraphs 0015 and 0016 of Patent Document 1 and FIGS. 2-4)

Instead of the above-described structure, there is also a case in which a clip is attached to the strut so as to be rotatable and integrated. (See paragraphs 0020-0023 of Patent Document 1 and FIGS. 5-8.)

Problems to be solved by the present invention are as follows.

(1) The clip of the separate body is not only troublesome to handle, but may also be lost or forgotten to be assembled.

(2) When the clip is integrated with the strut, it is necessary to install the pivot shafts on both outer sides of the strut, which increases the cost.

(3) In order to form the projections and the rotating shaft on the struts, high precision (coaxiality) must be provided to form the projections and the rotating shaft, so high processing accuracy is required.

(4) At least the plate thickness part of a clip will interfere easily with adjacent parts, such as a shoe return spring, which adjoins a strut.

Therefore, the workability of attaching the clip to the strut may be deteriorated, or the clip may not be mounted due to interference with adjacent parts.

(5) The clips need to be formed wide enough to be external to the struts.

Therefore, the material cost of the clip increases, and the processing cost of the clip increases because the recessed parts and the rotational axis of the clip must also be processed to have high precision (coaxiality).

(6) When the clip of the separate body is attached to the strut, press the side plate of the clip firmly with your finger until it passes through the projection of the strut, and keep it wide and keep the recessed part of the clip on the projections on both sides of the strut. Since work must be aligned and put together, the mounting workability of a clip is extremely bad.

This invention is made | formed in view of the above point, Comprising: It aims at providing the mechanical brake operation apparatus which can aim at the miniaturization of the whole apparatus, and the cost of components.

Further, another object of the present invention is to provide a mechanical brake operating device that can significantly improve the mounting workability of a clip.

In order to achieve the above object, the mechanical brake actuating device according to the present invention includes a strut having opposing pieces connected to one leg shoe and coupled to one brake shoe, and a plate-shaped operating lever engaged to the other brake shoe. And a brake cable which accommodates the operation lever in a space between the opposing pieces of the strut and pivotally supports the base end of the operation lever with respect to the strut so as to be connected to the free end of the operation lever with a connecting pin. In the mechanical brake actuating device in which both the operation lever and the strut rotate relative to each other, and both sides expand in opposite directions, the tow portion of the strut is moved relative to the connecting leg portion of the strut. Is mounted so as to allow rotation of the operation lever toward the half cable traction direction. The time to selectively limit is characterized in that the mounting.

In the present invention, by simply attaching a small size clip to the connecting leg of the strut, it is possible to restrict the rotation of the operation lever in the anti-cable traction direction and to reliably prevent the breakage of the brake cable. .

In the mechanical brake operation device described above, the clip has a pair of narrowing pieces, and the narrowing pieces are clamped with respect to the connecting leg of the strut.

The present invention is also characterized in that, in the above-described mechanical brake actuating device, the clip is supported by being held against the connecting leg of the strut.

In addition, in the mechanical brake operation device described above, the constriction piece has a positioning portion on a part of the constriction piece, and the operating lever is in contact with the positioning portion, thereby pulling the cable half of the operating lever. It is characterized by limiting the rotation in the direction.

The present invention is also characterized in that, in the mechanical brake operating device described above, the clip is slidably squeezed with respect to the connecting leg of the strut.

Further, the present invention, in the mechanical brake operation device described above, when the clip is in the retracted position, a part of the constriction piece of the clip and the connecting leg portion of the strut which the constriction piece interviews are fitted into one unevenness, The clip is slid so that, when the clip is in the forward position, a portion of the stencil piece of the clip and a connecting leg portion of the strut which the stenosis piece interviews are fitted into other concavities and convexities.
Further, the present invention is the mechanical brake actuation device described above, when the clip is in the retracted position, the operation of connecting the brake cable, the operation lever, and the connecting pin is possible, and further, the clip is in the forward position. When in, the rotation of the operation lever by the clip is limited, characterized in that configured to be impossible to connect the brake cable and the operation lever and the connecting pin.

delete

Further, the present invention is characterized in that, in the mechanical brake operating device described above, the clip is rotatably mounted to the connecting leg of the strut.

In addition, the present invention, in the above-described mechanical brake operating device, the concave and convex that can be fitted to each other in the clip and the connecting leg portion of the strut, respectively, are formed by fitting the concavities and convex to the connecting leg portion of the strut It is characterized by mounting the clip.

The present invention is also characterized in that, in the mechanical brake operating device described above, the clip is clamped with respect to the connecting leg portion of the strut in the front-back direction of the connecting leg portion.

In addition, the present invention is the mechanical brake operation device described above, wherein the clip is the brake cable and the position from the position on the side of the half-cable traction direction that can work to connect the brake cable, the operation lever and the connecting pin. It is characterized in that it is rotatable to the position of the cable pulling direction side, which is impossible to connect the operation lever and the connecting pin.

The present invention can obtain the following effects.

(1) When attaching the clip to the strut to restrict the rotation of the operating lever in the anti-cable traction direction, it is unnecessary to install projections on both outer sides of the strut, so that the overall width of the strut is It can be made small.

(2) Since the clip is attached to the connecting leg of the strut, there is no fear that the clip will interfere with parts close to the strut.

(3) By simply attaching the clip to the connecting leg of the strut, the workability of attaching the clip is remarkably improved.

(4) Since the position of the positioning portion of the clip for positioning the operation lever can be changed only by sliding or rotating the clip while being attached to the connecting leg portion of the strut, the connection work between the cable end and the operation lever It is possible to easily perform the operation of releasing and releasing.

(5) Since the clip is mounted on the connecting leg of the strut, the clip can be miniaturized and can be manufactured by simple bending processing, thereby reducing the material cost and processing cost of the clip.

(6) In the case where the clip is held in the connecting leg of the strut and supported, no additional machining of the strut is necessary.

(7) In the case where the clip is pivotably attached to the connecting leg of the strut, the clip can be further miniaturized and can be produced by simple bending, thereby reducing the material cost and processing cost of the clip.

Furthermore, when the clip attached to the connecting leg of the strut is rotated with a finger to limit the rotation in the anti-cable traction direction of the control lever, the vibration of the completion of the fitting to the finger is transmitted along with the fitting sound so that the hearing and haptic Since both can be perceived, the set work of a clip can be reliably performed.

Hereinafter, a mechanical brake operating device according to the present invention will be described.

<Example 1>

1 is a plan view showing an example of a drum brake equipped with a mechanical brake actuating device, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is an exploded perspective view of the aforementioned mechanical actuating mechanism. EMBODIMENT OF THE INVENTION Example 1 of this invention is described, referring drawings.

On the back plate 11 fixed to the floating part 10 of a vehicle body, a pair of brake shoes 12 and 13 are suspended by a shoe hold mechanism (not shown), and one of them is movable. The adjoining end of is supported by a standing portion 16a of the anchor 16, which will be described later, and the other adjoining end (not shown) is coupled to the connecting member.

By the pair of shoe return springs (only one shoe return spring 19 is shown) mounted between the pair of brake shoes 12 and 13, the pair of brake shoes 12 and 13 The contact state between the both ends of the connection member and the anchor 16 is maintained.

The mechanical actuating mechanism 22 which extends and operates one adjacent end of the pair of brake shoes 12 and 13 includes a strut 23, an operation lever 24, a pivot support pin 25, and a stop washer. It consists of 26, and is inserted between the pair of brake shoes 12 and 13 adjacent to the standing part 16a of the anchor 16. As shown in FIG.

In addition, the strut 23 has a space formed therein so as to surround the operation lever 24, and rotation of the operation lever 24 is performed to the connecting leg 23a connecting the opposing pieces 23b and 23b. The limiting clip 30 is provided.

' 형으로 절곡하여 대향편(23b)(23b)을 형성하고 있다. Strut 23, which is a constituent member of the mechanical actuating mechanism 22, consists of a single plate body, and at the same time installs the connecting leg 23a between both ends in the longitudinal direction

Is bent into a shape to form opposing pieces 23b and 23b.

Furthermore, one side of the opposing pieces 23b and 23b facing each other is superimposed and closely bonded by a welding method or the like, and a wide space (gap) 23c is formed between both ends in the longitudinal direction, and this space A narrower space (gap) 23d is formed continuously on the other side than 23c.

The shoe connection groove 23e is formed in one overlapping part of the opposing pieces 23b and 23b, and the pivot support holes 23f and 23f are perforated in the other.

The connection leg part 23a which connects over the opposing pieces 23b and 23b blocks the part of the wide space 23c.

As for the connection leg part 23a and the operation lever 24, all of the brake cable connection holes 24f formed in the free end part 24e of the operation lever 24 come from the wide space 23c of the strut 23. The relationship is set so that the operation lever 24 does not contact the connecting leg part 23a until it exposes.

By this structure, the cable end 42 fixed to the end of the inner cable 41 does not physically escape from the operating lever 24 during the transport of the drum brake.

As enlarged in FIG. 4, the protrusion part 23i and the groove part 23k are formed in the outer surface and inner surface of the connection leg part 23a used as the attachment part of the clip 30 mentioned later. The protrusion 23i and the groove 23k function to position the clip 30.

If the protrusions 23i and the grooves 23k are formed coaxially with the connecting leg 23a, both of them can be simultaneously formed by one press, but the positions of the protrusions 23i and the grooves 23k are necessarily formed. It is not limited to a coaxial line, You may form and deviate in the longitudinal direction of the strut 23. As shown in FIG.

The operating lever 24, which is one of the components of the mechanical actuating mechanism 22, is composed of a single plate-shaped member, and is accommodated so as to be sandwiched (snapped) into the spaces 23c and 23d of the strut 23. .

The shoe support groove 24b is formed in the base 24a of the operating lever 24, and the pivot support pin 25 is provided in one of the protrusions 24c which divides the shoe connection groove 24b. A stop washer is inserted into the tip of the pivot support pin 25 through which the pivot support ball 24d to be inserted is drilled and penetrated through the pivot support balls 23f, 24d and 23f of the strut 23 and the operation lever 24. (26) is provided, and the operation lever 24 is pivotally supported with respect to the strut 23 so that rotation is possible.

The operation lever 24 is in contact with the connecting leg portion 23a of the strut 23 or the clip 30 attached to the connecting leg portion 23a, and the rotation in the clockwise direction is limited in FIG. 2.

To the free end 24e of the operating lever 24, a cable end 42 fixedly attached to the end of the inner cable 41 constituting the brake cable 40 described later can be connected using the connecting pin 43. The brake cable connecting hole 24f is formed.

Moreover, as for the strut 23 and the operation lever 24 which comprise the mechanical actuation mechanism 22, the installation bolt 20 (each projection 23g, 24h on the side of the cable pull direction is shown in FIG. 2) ( 21) so that you can slide on the head.

The clip 30 is a member for restricting the rotation of the operating lever 24 clockwise in FIG. 2 and is slidably squeezed to the connecting leg 23a of the strut 23.

' 형으로 절곡가공하여, 스트럿(23)의 연결다리부(23a)를 탄성적으로 협지하도록 형성된다. As shown in FIG. 5, the clip 30 of the present example has a U-shaped or 'U' shape of a strip-shaped spring steel that is slightly narrower than the transverse width of the connecting leg portion 23a of the strut 23.

It is formed to be bent into a 'shape, to elastically sandwich the connecting leg 23 a of the strut 23.

Of the pair of narrowing pieces 31 and 32 facing each other, one of the narrowing pieces 31 in contact with the outer surface of the connecting leg portion 23a is freely fitted to the protrusion 23i of the strut 23 described above. Positioning holes 31a are formed to be drilled.

The connecting projection 32a which protrudes toward the one narrowing piece 31 and fits in the groove part 23k of the strut 23 mentioned above to the other narrowing piece 32 joined to the inner surface of the connection leg part 23a. And a positioning portion 32b protruding largely in the direction away from the narrowing piece 31 by bending the end portion.

The connecting projections 32a and the positioning holes 31a of the clip 30 are individually formed in the groove portions 23k formed on the inner and outer surfaces of the connecting leg portions 23a of the struts 23 and the protrusions 23i, respectively. By fitting, the clip 30 can be positioned at a different position with respect to the connecting leg 23a.

When the connecting lever 32a of the clip 30 is fitted into the groove portion 23k formed on the inner surface of the connecting leg portion 23a of the strut 23 to clamp the clip 30, the operation lever 24 The end face is in direct contact with the connecting leg portion 23a of the strut 23 to limit the rotation of the operating lever 24.

When the clip 30 is slid to clamp the positioning hole 31a to fit into the protrusion 23i formed on the outer surface of the connecting leg 23a of the strut 23, the operation lever 24 The end face is in contact with the positioning portion 32b of the clip 3 so as to limit the rotation of the operating lever 24.

That is, in this example, by sliding the clip 30 clamped to the connecting leg portion 23a of the strut 23 back and forth, the allowable position (rotation angle) in which the operation lever 24 is rotated toward the half cable traction direction is shown. It is possible to change to two stages.

In particular, in the case of restricting the rotation of the operating lever 24 by fitting the connecting projection 32a of the clip 30 to the groove portion 23k formed on the inner surface of the connecting leg portion 23a. All of the brake cable connecting holes 24f of the brake cable connector 24f are exposed from the wide space 23c of the strut 23 (upwardly based on FIG. 2), and the strut hole 31a of the clip 30 is struted. When the rotation of the operating lever 24 is restricted by fitting to the protrusion 23i formed on the outer surface of the connecting leg portion 23a of the 23, the operating lever 24 does not come out. Protruding amount and operating lever of the positioning portion 32b of the clip 30 so that a part of the brake cable connecting hole 24f formed at the free end 24e of the clip 30 is located in the wide space 23c of the strut 23. Reference numeral 24 is related to each other (see Fig. 8).

The ends of the two narrowing pieces 31 and 32 may be folded outwardly (bending) so that the opening of the clip 30 can be smoothly inserted into the side end of the connecting leg portion 23a of the strut 23, It is not essential.

The brake cable 40 shown in FIGS. 2 and 3 is composed of an inner cable 41, an outer casing 44, and the like.

Next, the connection method of a brake cable is demonstrated.

6 shows the state of the mechanical actuating mechanism 22 immediately after connecting the brake cable 40 to the operating lever 40, and FIG. 7 shows the mechanical actuating mechanism before connecting the brake cable 40 to the operating lever 24. FIG. The state of (22) is enlarged and shown.

The clip 30 has a pair of narrowing pieces 31 and 32 fixed to the inner and outer surfaces of the connecting leg portion 23a of the strut 23, and the connecting protrusion 32a of the connecting leg portion 23a. It is fitted and positioned in the groove part 23k formed in the inner surface.

Positioning of the clip 30 is not only the fitting position of the groove portion 23k of the connecting projection 32a, but also the edges on both sides of the other narrowing piece 32 are in light contact with the portion where both sides of the connecting leg portion 23a stay. Since the shaking to the side is restrained, stable positioning is achieved.

Since the positioning portion 32b of the clip 30 is retracted to a position approaching the groove portion 23k of the connecting leg portion 23a, the positioning portion 32b does not interfere with the operation lever 24. .

Accordingly, in the state where the clip 30 is positioned at the position where the clip 30 is retracted with respect to the connecting leg portion 23a of the strut, the rotation range toward the half-cable traction direction of the operation lever 24 is about the middle of the operation lever 24. Is limited to the position in contact with the connecting leg 23a of the strut 23 (see Fig. 7).

At this time, the free end 24e of the operating lever 24 protrudes from the opening of the wide space 23c of the strut 23 toward the half cable pull direction, and the whole of the brake cable connecting hole 24f is strut 23. It is in the state exposed all from the opening part of (refer FIG. 7).

When the inner cable 41 is picked up by a finger and inserted into the guide pipe 45, the cable end 42 fixed to the end of the inner cable 41 is operated through the wide space 23c of the strut 23. The free end 24e of 24 is reached. The free end 24e of the operating lever 24 is accommodated between a pair of ear pieces 42b and 42b formed at the cable end 42 to connect the connecting holes 42c, 24f and 42c. In the state of matching, the connecting pin 43 is inserted and the operation lever 24 and the cable end 42 are connected.

When the cable end 42 is connected to the operation lever 24, as shown in FIG. 8, the rear end of the clip 30 in the right direction is inserted with a finger in a direction approaching the free end 24e of the operation lever 24. As shown in FIG. The clip 30 is released from the fitting projection between the connecting projection 32a and the groove portion 23k formed on the inner surface of the connecting leg portion 23a of the strut 23.

When the clip 30 is further inserted, the positioning hole 31a open to the clip 30 is fitted to the protrusion 23i formed on the upper surface of the connecting leg 23a of the strut 23, thereby providing a clip ( 30) is positioned at the position advanced with respect to the connecting leg 23a.

Finally, the casing cap 44a of the outer casing 44 is fixedly mounted to the other end of the guide pipe 45 by the fixing ring 46 (see FIG. 2).

In addition to sliding the clip 30 to change the narrowing position to a position approaching the free end 24e of the operating lever 24, the positioning portion 32b also has the free end 24e of the operating lever 24. Approach

Therefore, after this, when the operation lever 24 tries to rotate in the half cable traction direction, the operation lever 24 contacts the positioning portion 32b of the clip 30 and further rotation is restricted (see Fig. 8). ).

The rotation allowable range of the operation lever 24 at this time is smaller than the case where the operation lever 24 shown in FIG. 7 is in contact with the connecting leg portion 23a of the strut 23.

Therefore, the connecting pin 43 is always located in the wide space 23c of the strut 23, so that the cable end 42 does not physically deviate from the operating lever 24.

In addition, when the cable end 42 and the operation lever 24 need to be disconnected due to the replacement of the brake cable 40, the clip 30 is clamped to the connecting leg 23a of the strut 23. 7 is retracted to the pivot support side of the operating lever 24 to the state shown in FIG. 7, and then the operating pin 24 is rotated in the half cable pulling direction, whereby the connecting pin 43 can be easily removed.

In this example, the protrusion 23i and the groove 23k are simply formed on the connecting leg portion 23a of the strut 23 by a simple press process. No machining precision is required.

In addition, in order to attach the clip 30 to the connecting leg portion 23a of the strut 23, the entire width of the strut is made thin without interfering with adjacent parts such as a shoe return spring close to the strut as in the prior art. It is possible to design. Therefore, workability of attaching the clip 30 is remarkably improved.

In addition, the amount of spring steel used for forming the clip 30 can be reduced, which is economical.

Next, the mechanical brake operating device according to the second embodiment will be described based on FIGS. 9 to 11.

As shown in Fig. 9, the clip 50 used in the second embodiment has a rectangular first positioning hole in one of the narrowing pieces 51 in contact with the outer surface of the connecting leg portion 23a of the strut 23. The 51a and the circular second positioning holes 51b are formed with a predetermined distance in the longitudinal direction of the clip 50.

The inner edge of the 1st positioning hole 51a which faces the 2nd positioning hole 51b is formed with the guide piece 51c curved by the cutting process.

As for the guide piece 51c formed in the inner edge of the 1st positioning hole 51a, when the clip 50 is inserted, the protrusion part 23i of the outer surface of the connecting leg part 23a of the strut 23 guides. The inner circumferential surface of the first positioning hole 51c may be rounded in place of the guide piece 51c by having a function of being guided to the piece 51c and smoothly exiting from the first positioning hole 51a.

By this guide piece 51c, the slide of the clip 50 is simplified.

The mounting method of the clip 50 is inserted in the same manner as in the first embodiment described above so as to be inserted into the operation lever pivot support direction of the connecting leg portion 23a of the strut 23, and using the elastic force of the clip 50. It installs by clamping to the connection leg part 23a of the strut 23. As shown in FIG.

After mounting, the clip 50 positions the strut 23 by fitting the first positioning hole 51a of the clip 50 to the protrusion 23i on the outer surface of the connecting leg portion 23a. Thereby, the rotatable range of the control lever 24 toward the half cable traction direction is limited at the position where the control lever 24 is in contact with the connecting leg 23a (see Fig. 10).

When the operating lever 24 is brought into contact with the connecting leg portion 23a, the entire brake cable connecting hole 24f provided in the free end portion 24e of the operating lever 24 is completely removed from the opening of the strut 23. Since it is set in advance so as to expose, it is easy to connect the operation lever 24 and the cable end 42 by inserting the connecting pin 43.

When the operation lever 24 and the cable end 42 have been connected, the clip 50 is further inserted to connect the second positioning hole 51b of the clip 50 to the protrusion of the outer surface of the connecting leg 23a. 23i), the clamping position of the clip 50 is changed to the approaching position of the free end 24e of the operating lever 24 (see Fig. 11).

In conjunction with changing the clamping position of the clip 50, the positioning portion 52b of the clip 50 also approaches the free end 24e of the operating lever 24, and as a result, the operating lever 24 The rotatable range of) is limited to the position where the operating lever 24 is in contact with the positioning portion 52b formed at the end of the other narrowing piece 52.

Therefore, since the rotation of the operating lever 24 is limited by the positioning portion 52b of the clip 50 thereafter, the connecting pin 43 is always located in the wide space 23c of the strut 23. The cable end 42 does not physically escape from the operating lever 24.

In this example, in addition to being able to obtain the same advantages as the above-described first embodiment, the process is completed by only forming the protrusion 23i in the connecting leg portion 23a of the strut 23. There is an advantage that the processing becomes simpler.

The mechanical brake operating apparatus which concerns on Example 3 based on FIG. 12, 13 is demonstrated. In this example, not only the clip 60 formed by bending a single spring steel is pressed on the upper and lower surfaces of the connecting leg portion 23a of the strut 23, but also held and supported to surround the connecting leg portion 23a. It shows an example of installation.

The clip 60 of this example has a full length of which the pair of mounting pieces 61 and 62 is longer than the transverse width of the connecting leg portion 23a of the strut 23, and the strut 23 is attached to one mounting piece 61. The bending portion 61d is formed by bending the end portion thereof over the connecting leg portion 23a of the bottom end.

The other mounting piece 62 is bent and folded (bended) near its end portion beyond the connecting leg portion 23a of the strut 23, and extended in a direction away from the one mounting piece 61. This extended range is formed as the positioning portion 62b.

The clip 60 of this example has a function of supporting the positioning leg 62b by holding the connecting leg 23a of the strut 23 in cooperation with the bending portion 61d, as well as the half cable traction of the operating lever 24. It also has a function as a stopper member for limiting rotation of the direction.

Therefore, in a state where the clip 60 is supported by the connecting leg portion 23a of the strut 23, the entirety of the brake cable connecting hole 24f of the operating lever 24 is not exposed from the opening of the strut 23. In the non-positioned position, the extension amount of the positioning portion 62b and the operating lever 24 are related to each other so that the positioning portion 62b can interfere with the operating lever 24 and limit the rotation in the anti-cable traction direction. Is being built.

In this example, before the clip 60 is mounted, the connecting pin 43 is inserted to connect the operating lever 24 and the cable end 42, or as shown in FIG. 12, the brake cable of the operating lever 24. At the position where the entirety of the connecting hole 24f is exposed from the opening of the strut 23, the cable end portion (with the clip 60 held in the connecting leg portion 23a of the strut 23 only by a predetermined amount) is installed. 42 is connected to the operation lever 24.

When the connecting pin 43 is inserted to connect the cable end 42 to the operating lever 24, the clip 60 is inserted deep into the connecting leg 23a of the strut 23 as shown in FIG. It is installed to hold and support the strut (23). Since the clip 60 after mounting can limit the rotation of the positioning lever 62b in the anti-cable traction direction of the operating lever 24, the connecting pin 43 is always the wide space 23c of the strut 23. ), The cable end 42 does not physically deviate from the operating lever 24.

In this example, in addition to obtaining the same advantages as in the first embodiment, the strut 23 does not require any processing, and the clip 60 is not required for drilling and can be manufactured only by bending. This has the advantage of reducing the number of machining operations.

The mechanical brake operating apparatus which concerns on the modification of Example 3 based on FIG. 14 is demonstrated.

The clip 60 of this example extends toward the free end 24e of the operating lever 24 without bending the other mounting piece 62 to form the positioning portion 62b, and at the same time the one mounting piece 62 The positioning portion 62b extending beyond the bending portion 61d formed by bending in 61 is brought into contact with the outer circumferential surface of the free end portion 24e of the operating lever 24, so that the cable end 42 is operated by the operating lever 24. ), The rotation of the operating lever 24 in the half-cable traction direction is restricted.

In this example, not only the spring force of the pair of mounting pieces 61 and 62 is pressed against the connecting leg portion 23a of the strut 23, but also one mounting piece 61 as in the previous embodiment 3. The bending part 61d formed by bending to the side) contacts the end surface beyond the connecting leg part 23a, and the clip 60 is supported by the connecting leg part 23a of the strut 23.

This example has described the case where the positioning portion 62b of the clip 60 is brought into contact with the outer circumferential surface of the free end 24e of the operating lever 24, but is formed by extending over the extension line of the other mounting piece 62. One positioning portion 62b may be brought into contact with the intermediate portion of the operating lever 24.

In addition, although the above-described embodiment has described the case where the clip is inserted and squeezed from the operating lever pivot support direction of the connecting leg portion 23a of the strut 23, on the contrary, in the strut overlapping direction of the connecting leg portion 23a. It may be inserted and narrowed.

Based on FIG. 15, the mechanical brake operating apparatus which concerns on Example 4 is demonstrated.

The clip 60 shown in FIG. 15 has a total length longer than the transverse width of the connecting leg portion 23a of the strut 23 while the pair of mounting pieces 61 and 62 have both mounting pieces 61 ( Struts 23 are formed by bending portions 61d and 62c formed by bending the ends of the ends 62, and positioning projections 61e formed on one or both of the mounting pieces 61 and 62, respectively. It is formed in the connecting leg part 23a of the positioning so that positioning is possible. Moreover, in the clip 60, the extension part of the other mounting piece 62 is formed as the positioning part 62b, among a pair of mounting pieces 61 and 62 extending from the positioning projection 61e to the left. have.

If the length of the clip 60 is set to about twice the length of the transverse width of the connecting leg portion 23a of the strut 23, and the positioning projection 61e is formed in the middle thereof, the connecting leg of the strut 23 is formed. Positioning is possible by deflecting the clip 60 with respect to the portion 23a in the left direction or the right direction of the drawing.

When the clip 60 is clamped to the connecting leg portion 23a of the strut 23, the pair of mounting pieces 61 and 62 are moved from the left side with respect to the connecting leg portion 23a of the strut 23. Inserting, inserting the clip 60 deep enough so that the positioning section 62b abuts on the inner surface of the connecting leg section 23a (see the clip 60 shown by the dashed-dotted line in FIG. 15), and positioning The projection 61e is held in contact with the side end surface in the left direction of the connecting leg portion 23a.

When the clip 60 is deflected to the left of the drawing with respect to the connecting leg portion 23a of the strut 23, the whole of the brake cable connecting hole 24f of the operating lever 24 is exposed from the opening of the strut 23. The amount of extension of the positioning portion 62b and the operating lever 24 are associated with each other so that the positioning portion 62b can interfere with the operating lever 24 and limit the rotation in the anti-cable pulling direction at a position where the position is not. have.

In addition, when the clip 60 is deflected in the right direction in the drawing with respect to the connecting leg portion 23a of the strut 23, the connecting pin 43 is inserted to connect the operating lever 24 and the cable end 42. The connecting leg 23a of the clip 60 and the strut 23 is related so that the whole of the brake cable connecting hole 24f of the operating lever 24 can be exposed from the opening of the strut 23. .

When the operation lever 24 and the cable end 42 are connected, the clip 60 is inserted into the left side of the drawing and slides, as shown by the solid line in FIG. 15, and ends of both mounting pieces 61 and 62 are slid. Positioning is performed on the connecting leg portion 23a of the strut 23 in accordance with the bending portions 61d and 62c and the positioning projection 61e.

By positioning the clip 60 by sliding the clip 60 to the connecting leg 23a of the strut 23, the positioning portion 62b formed on the clip 60 is the free end 24e of the operating lever 24. Since it protrudes toward the side, the operation lever 24 interferes with the positioning part 62b formed in the clip 60, and the rotation of the operation lever 24 in the half cable traction direction is restricted.

The mechanical brake operating apparatus which concerns on Example 5 is demonstrated based on FIG. 16, 17. FIG.

This example shows an example in which the clip 70 is rotatably mounted with respect to the connecting leg portion 23a of the strut 23. When the clip 70 is located on the half cable pulling direction side, the brake cable 40 And the operation lever 24 and the connecting pin 43 can be connected to each other. When the clip 70 is located on the cable traction direction side, the operation of the operation lever 24 is rotated by the clip 70. It is configured to limit the operation of connecting the brake cable 40 and the operation lever 24 and the connecting pin 43 by limiting.

In other words, when the clip 70 is positioned at the half cable pull direction side, once the brake cable 40, the operating lever 24, and the connecting pin 43 are connected, the clip 70 is placed at the cable pull direction direction side. When located, the configuration is such that the connection between the three parties is not released.

More specifically, the clip 70 shown in FIGS. 16 and 17 has the other mounting piece 72 in contact with the inner surface of the connecting leg portion 23a among the pair of mounting pieces 71 and 72 facing each other. ) Is formed shorter than one mounting piece 71, and the other mounting piece 72 is fitted to the projection 23i formed on the inner surface of the connecting leg portion 23a with concavities and convexities for positioning. The ball 72d is drilled.

One mounting piece 71 extends to the length exceeding the connection leg part 23a, and the bending part 71d which bends this extended range and is able to contact the front end (left end of drawing) of the connection leg part 23a. At the same time, a positioning portion 71e extending beyond the bending portion 71d is formed. The positioning section 71e is brought into contact with the outer edge of the free end 24e of the operating lever 24, and after the cable end 42 is connected to the operating lever 24, the half cable of the operating lever 24 is connected. It is to limit the rotation in the traction direction.

When attaching the clip 70 to the connecting leg portion 23a, the pair of mounting pieces 71 and 72 are inserted from the rear side (right direction in the drawing) with respect to the connecting leg portion 23a, and the clip ( Inserting 70 to the deeper position, and fitting the clip 70 to the projection hole 23i formed on the inner surface of the connecting leg portion 23a by unevenness of the positioning hole 72d of the other mounting piece 72; Position it.

As for the full length of the one mounting piece 71 formed in the clip 70, the bending part 71d formed in the free end is the front end of the connection leg part 23a (left end of drawing), unless a force is applied forcefully. It is set to the length which can be in contact with and hold | maintain the state which the one mounting piece 71 is located in the half cable pull direction direction side.

When the said bending part 71d rotates by forcibly applying a pressing force to one mounting piece 71, the connection leg part 23a is connected between the straight part of one mounting piece 71, and the bending part 71d. It is formed so that the front end (left end of the drawing) of the can be narrowed.

Therefore, the elastic deformation force of the bending part 71d becomes the clamping force of the clip 70.

In addition, when the one mounting piece 71 of the clip 70 is located in the half cable traction direction side, the whole of the brake cable connecting hole 24f of the operating lever 24 is entirely from the opening of the strut 23. In order to expose, the extension amount of the positioning part 71e of the clip 70 and the connection leg part 23a are related.

Positioning part when the one mounting piece 71 is forcibly inserted so as to approach the outer surface of the connecting leg part 23a, and the one mounting piece 71 of the clip 70 is located in the cable traction direction side. 71e is brought into contact with the outer edge of the free end 24e of the operating lever 24, and after connecting the cable end 42 to the operating lever 24, the rotation of the operating lever 24 in the half cable traction direction is performed. The extension amount of the positioning portion 71e and the operation lever 24 are associated with each other so as to limit the number of points.

In this example, in addition to obtaining the same advantages as the first embodiment described above, the clip 70 can be further downsized and can be manufactured by simple bending, thereby reducing the material cost and processing cost of the clip 70. Can be saved.

Further, when the clip 70 mounted on the connecting leg portion 23a of the strut 23 is rotated by a finger and the rotation of the operation lever 24 in the half-cable traction direction is restricted, the finger together with the fitting sound is used. Since the vibration of the fitting completion is transmitted and perceived by both hearing and touch, there is an advantage that the set work of the clip 70 can be reliably performed.

The mechanical brake operating apparatus which concerns on the modification of Example 5 based on FIG. 18, 19 is demonstrated.

This example shows an example in which the clip 70 is secured to the front and rear edges of the connecting leg portion 23a so as to be rotatable with respect to the connecting leg portion 23a of the strut 23, and the clip 70 is a half cable. When it is located in the traction direction side, it is possible to connect the brake cable 40, the operation lever 24, and the connecting pin 43, and when the clip 70 is located in the cable traction direction side, the clip The rotation of the operation lever 24 is limited by the 70, so that the operation of connecting the brake cable 40, the operation lever 24, and the connecting pin 43 is impossible.

More specifically, the clip 70 shown in FIG. 18, 19 forms the connection part 73 between the pair of mounting pieces 71 and 72 which oppose each other. Forming the other mounting piece 72 in contact with the inner surface of the connecting leg portion 23a shorter than the one mounting piece 71 is similar to the fifth embodiment described above, but it is not necessary to provide the positioning holes 72d. It is possible to make it shorter.

At the free end of one of the mounting pieces 71 extending in the length beyond the connecting leg portion 23a, the first and second bending portions 71d and 71f are bent in a waveform to form a clip ( 70 cooperates with the said connection part 73 step by step at the front-back-end edge (left-right edge of a figure) of the connection leg part 23a of the strut 23. As shown in FIG. The elastic deformation force of the first and second bending portions 71d and 71f becomes the clamping force of the clip 70 with respect to the front and rear edges (left and right edges in the drawing) of the connecting leg portion 23a.

In this example, the second bending portion 71f also serves as a positioning portion for restricting rotation of the operating lever 24 in the anti-cable traction direction.

As shown in FIG. 18, when the 2nd bending part 71f of the clip 70 is connected to the front edge (left edge of a figure) of the connection leg part 23a, the brake cable connection hole 24f of the operating lever 24 is shown. The clip 70 and the connecting leg 23a of the strut 23 are associated with each other so that the entirety of) is exposed from the opening of the strut 23.

Moreover, as shown in FIG. 19, the one mounting piece 71 of the clip 70 is forcibly inserted so as to approach the outer surface of the connecting leg part 23a of the strut 23, and the 1st bending part of the clip 70 ( When 71d is connected to the front edge (left edge of the drawing) of the connecting leg portion 23a, the second bending portion 71f serving as the positioning portion contacts the outer edge of the free end 24e of the operating lever 24. After the cable end 42 is connected to the operation lever 24, the amount of extension of the second bending portion 71f and the operation lever (1) can be restricted so as to limit the rotation of the operation lever 24 in the half cable traction direction. 24) is involved.

In addition, the clip 30, 50, 60, 70 according to the present invention described above is not limited to the spring steel, but may be made of, for example, resin or the like. Good if you can.

The present invention can obtain the following effects.

(1) When attaching the clip to the strut to restrict the rotation of the operating lever in the anti-cable traction direction, it is unnecessary to install projections on both outer sides of the strut, so that the overall width of the strut is It can be made small.

(2) Since the clip is attached to the connecting leg of the strut, there is no fear that the clip will interfere with parts close to the strut.

(3) By simply attaching the clip to the connecting leg of the strut, the workability of attaching the clip is remarkably improved.

(4) Since the position of the positioning portion of the clip for positioning the operation lever can be changed only by sliding or rotating the clip while being attached to the connecting leg portion of the strut, the connection work between the cable end and the operation lever It is possible to easily perform the operation of releasing and releasing.

(5) Since the clip is mounted on the connecting leg of the strut, the clip can be miniaturized and can be manufactured by simple bending processing, thereby reducing the material cost and processing cost of the clip.

(6) In the case where the clip is held in the connecting leg of the strut and supported, no additional machining of the strut is necessary.

(7) In the case where the clip is pivotably attached to the connecting leg of the strut, the clip can be further miniaturized and can be produced by simple bending, thereby reducing the material cost and processing cost of the clip.

Furthermore, when the clip attached to the connecting leg of the strut is rotated with a finger to limit the rotation in the anti-cable traction direction of the control lever, the vibration of the completion of the fitting to the finger is transmitted along with the fitting sound so that the hearing and haptic Since both can be perceived, the set work of a clip can be reliably performed.

Claims (11)

A strut having opposite pieces connected to the connecting leg part by being coupled to one brake shoe, It is provided with the plate-shaped operation lever couple | bonded with the other brake shoe, While accommodating the operation lever in the space between the opposing pieces of the strut and pivotally supporting the proximal end of the operation lever with respect to the strut, In the mechanical brake operation device, when the brake cable connected to the free end of the operation lever is pulled by the connecting pin, the operation lever and the strut rotate relative to each other, and both of them extend in opposite directions. A mechanical brake is mounted to the connecting leg of the strut so as to be relatively movable relative to the connecting leg of the strut, and to selectively limit rotation of the operating lever in the half-cable pulling direction of the operating lever. Actuator. The method of claim 1, The clip has a pair of constriction pieces, and the constriction piece is clamped with respect to the connecting leg of the strut. The method according to claim 1 or 2, And mechanically support the clip against the connecting leg of the strut. The method of claim 2, The constriction piece has a positioning portion on a part of the constriction piece, and the operating lever is in contact with the positioning portion, and the mechanical brake actuating device is characterized by limiting rotation in the half-cable traction direction of the operating lever. . The method of claim 2, And the clip is slidably squeezed with respect to the connecting leg of the strut. The method of claim 5, wherein When the clip is in the retracted position, a part of the constriction piece of the clip and the connecting leg portion of the strut which the constriction piece interviews are fitted into one unevenness, And sliding the clip so that when the clip is in the forward position, a part of the constriction piece of the clip and a connecting leg portion of the strut which the constriction piece interviews are fitted with other concavities and convexities. The method according to claim 5 or 6, When the clip is in the retracted position, the operation of connecting the brake cable, the operating lever and the connecting pin is possible. Furthermore, when the clip is in the forward position, rotation of the operating lever by the clip is limited. Mechanical brake operation device, characterized in that configured to be impossible to connect the brake cable and the operation lever and the connecting pin. The method according to claim 1 or 2, And the clip is pivotally mounted relative to the connecting leg of the strut. The method of claim 8, And a concave-convex portion which can be fitted to each other at the clip and the connecting leg portion of the strut, respectively, and attaching the clip to the connecting leg portion of the strut by fitting the concave-convex portion. The method of claim 8, And the clip is clamped with respect to the connecting leg portion of the strut in the front and rear directions of the connecting leg portion. The method of claim 8, The clip, From the position of the half cable traction direction side which can work which connects the said brake cable, the said operation lever, and the said connection pin, In the position of the cable traction direction side which is impossible to connect the brake cable, the operation lever and the connecting pin, Mechanical brake actuator, characterized in that rotatable.

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