JP2009257530A - Piston pulling-off jig for disk brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piston pulling-off jig for a disk brake device capable of safely and effectively performing a pulling-off operation of a piston one by one in order in spite of any shape of a caliper. <P>SOLUTION: The piston pulling-off jig for a disk brake device has a base block 12, a slide block 14, a projection type nut 20 arranged on a recess and projection connecting section arranged along the sliding direction against slide surfaces β, δ formed on an opposite surface between the base block 12 and the slide block 14 or a T-shaped groove 24, and a bolt 22 engaged with the projection type nut 20. The slide surfaces β, δ are inclined so that wall thickness of the base block 12 may change along the sliding direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a piston removal jig for a disc brake device, and more particularly to a piston removal jig for a disc brake device having a one-pot to multi-pot caliper.

  Conventionally, when a piston of a disc brake device is removed from a cylinder for the purpose of exchanging a seal, an operation is performed in which an appropriate spacer is sandwiched between calipers and air is introduced into the cylinder to remove the piston. However, if the piston is pulled out by air at once, the impact will be great, and after it is pulled out, the piston may collide with the caliper body or roll outside, which may damage the sliding surface and protrusion of the piston. There was also a problem. Therefore, conventionally, when it is desired to pull out the piston little by little, a plurality of thin plate members 3 are sandwiched between calipers 1 as shown in FIGS. The work of reducing the number was repeated. However, such work has a problem that the greater the number of operations, the greater the danger, such as having to hold all the thin plate members 3 and possibly holding hands between the thin plate members 3. .

As a device that can safely perform the piston pull-out operation in the disc brake device having such a problem, there is a device disclosed in Patent Document 1. The device disclosed in Patent Document 1 is a device suitable for a piston removal operation in a caliper floating type (floating type) disc brake device. Specifically, an anchor plate that straddles the constricted portion of the claw portion of the caliper, an engaging portion that engages with a piston to be pulled out, and a pull configured to be able to pull the engaging portion with the anchor plate as a fulcrum. And a rod.
JP 2007-198454 A

If it is an apparatus of the above structure, it will be possible to safely extract the piston from the caliper. However, the apparatus having the above-described configuration cannot cope with a counter-type disc brake device (opposed disc brake device).
In view of the above problems, the piston brake jig of the disc brake device according to the present invention is a work for gradually pulling out the piston with a simple configuration and procedure regardless of the configuration of the caliper such as the floating type and the opposed type. It is an object of the present invention to provide a piston removal jig for a disc brake device capable of repeating the above.

  In order to achieve the above object, a piston removal jig of a disc brake device according to the present invention is slidable on a base block and on the base block, and the surface opposite to the arrangement direction of the base block is made symmetrical. A concave block provided along a slide direction with respect to a slide surface formed on a facing surface between the base block and the slide block, and a groove And the slide surface is inclined so that the thickness of the base block changes along the slide direction.

  Further, in the piston extracting jig having the above-described features, a slide member disposed in the concave groove instead of the convex portion on the slide surface, and a screwing means for screwing to the slide member The concave groove has a bottom width wider than an opening width, and the screw member is screwed to the slide member so that the slide member is positioned on the opening side of the concave groove. It is preferable to use a structure that presses against a wall surface. According to such a configuration, the piston removal jig is not unnecessarily disassembled. Moreover, since it can adjust to arbitrary height and can fix this, it is especially convenient when the operation | work is repeated for every extraction height by a flow operation.

  Further, the piston extraction jig having the above-described characteristics is characterized in that the concave groove is a T-shaped groove, and the T-shaped groove is formed so as to straddle the base block and the slide block. It is preferable to arrange the opening of the groove on the part extension line. By adopting such a configuration, when the step portion is opposed to the piston to be extracted, the groove and the screwing means are directed toward the caliper bottom surface. Therefore, it is possible to adjust the height without sequentially removing the piston removal jig arranged on the caliper.

  In the piston brake jig of the disc brake device having the above-described characteristics, the concave groove is formed in the slide block side slide surface, and the screwing means is arranged in the slide direction via the base block. You may do it. In such a configuration, unevenness does not occur on the side surface of the piston removal jig. Therefore, the storage property can be improved during storage or the like.

  Further, the piston pulling jig of the disc brake device having the above-mentioned feature forms a concave stepped portion on the surface of the slide block opposite to the base block arrangement direction, and the concave bottom portion of the stepped portion is formed. The piston facing surface may be used. By setting it as such a structure, the difference of protrusion amount can be given between pistons other than the piston made into extraction object, and the piston made into extraction object. Therefore, regardless of the number of pistons, it is possible to sequentially extract only the pistons to be extracted one by one.

  Further, the piston pulling jig of the disc brake device having the above-described features divides a convex portion adjacent to the stepped portion in the slide block from the slide block, and the second portion on the concave bottom surface portion and an extension line thereof is second. It is good also as a structure which can slide the said convex part divided | segmented as this slide surface. According to such a configuration, it is possible to adjust the position of the piston to be extracted in addition to the height of the entire piston extracting jig. For this reason, the kind of caliper which can respond with one piston extraction jig will increase.

  According to the piston extraction jig of the disc brake device having the above-described features, the operation of gradually extracting the piston can be repeated with a simple configuration and procedure regardless of the configuration of the caliper.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment according to a piston removal jig of a disc brake device of the present invention will be described in detail with reference to the drawings.
First, with reference to FIG. 1, a basic form (hereinafter referred to as a first embodiment) of a piston removal jig (hereinafter simply referred to as a piston removal jig) of a disc brake device of the present invention will be described. 1A is a front view, FIG. 1B is an AA cross section in FIG. 1A, and FIG. 1C is an exploded view with the bolts in FIG. 1B removed. It is a figure which shows a mode.

  The piston removal jig 10 according to the present embodiment is configured based on a base block 12 and a slide block 14. The base block 12 is a block for adjusting the arrangement height of the slide block 14, which will be described in detail later. The slide block 14 projects from a caliper 30 (see FIG. 2) of the disc brake device. It is a block which has a level difference part for receiving.

  The base block 12 has a substantially trapezoidal front shape. When the bottom surface of the base block 12 is α in the drawing, β in the drawing, which is a surface located on the opposite side of the bottom surface α, is formed with an inclination with respect to α. Β thus formed with an inclination plays a role of a slide surface with respect to the slide block 14 (hereinafter, β is referred to as a slide surface β), and the thickness (height) of the base block 12 is set along the slide direction. Will change.

  The slide block 14 has a piston receiving surface γ formed so as to be parallel to the bottom surface α of the base block 12. The piston receiving surface γ is a surface for receiving the projecting piston 40b that is disposed opposite to the piston to be extracted (piston 40b in FIG. 2), and corresponds to the concave bottom surface portion in the stepped portion. For this reason, the convex part 16 for making the difference of protrusion amount between pistons other than extraction object (piston 40a in FIG. 2) in the adjacent position of piston receiving surface (gamma) is provided. Since the slide block 14 has the piston receiving surface γ parallel to the bottom surface α, the sliding surface δ that faces the sliding surface β is the same as the inclination angle of the sliding surface β with respect to the bottom surface α with respect to the piston receiving surface γ. Have an angle.

  The slide surface β and the slide surface δ, which are the contact surfaces of the base block 12 and the slide block 14, are formed at the positions where the base block 12 and the slide block 14 are crossed over the slide surfaces β and δ. Grooves are formed. As a result, a T-shaped groove (hereinafter simply referred to as a T-shaped groove 24) is provided on the contact surface. The T-shaped groove 24 is a concave groove whose cross-sectional shape is a T-shape by combining a bottom-side groove with a wide groove width and an opening-side groove with a narrow groove width at the center. By adopting such a configuration, the width of the groove bottom becomes wider than the groove width of the opening, and by arranging the slide member having a shape matched to the groove, the slide member can be opened in the groove. It can be prevented from falling off from the side.

  The T-shaped groove 24 is provided with a convex nut (sliding member) 20 that matches the cross-sectional shape, and the bolt 22 is screwed into the convex nut 20 from the concave groove opening side. Here, it is preferable that the washer 22a inserted through the bolt 22 has a larger diameter. The base block 12 and the slide block 14 include a lower half portion of the convex nut 20 disposed in the T-shaped groove 24 and a head of a bolt 22 screwed into the convex nut 20 (or a washer 22a inserted through the bolt 22). It is fastened by being pinched by. Specifically, by tightening the bolt 22, the convex nut 20 is attracted to the opening side of the T-shaped groove 24, and the lower half of the convex nut 20 is pushed against the opening side wall surface of the T-shaped groove 24. When applied, the frictional force increases, and it becomes difficult to slide the convex nut 20. For this reason, by enlarging the washer 22a that constitutes a substantial clamping portion by the convex nut 20 and the bolt 22 that clamp the base block 12 and the slide block 14, the clamped state, that is, the base block 12 and the slide block 14 The fastening state of can be stabilized. Note that the T-shaped groove 24 and the bolt (the convex nut 20 screwed into the bolt 22) are not necessarily provided on both the front surface and the back surface in the drawing.

  The piston extraction jig 10 having the above-described configuration is provided with a step portion on the slide block 14, and thus has a thick portion and a thin portion as a whole. Thereby, the difference of the protrusion amount from a piston protrusion surface can be given between piston 40b made into extraction object, and the piston which is not made extraction object. For this reason, even when the piston 40b to be extracted is removed, at least a part of the piston 40a other than the extraction target remains in the cylinder 38, and only the piston 40b to be extracted can be extracted from the cylinder 38. It becomes possible.

  The piston removal jig 10 having such a configuration loosens the bolt 22 that holds both the base block 12 and the slide block 14, thereby sliding the slide block 14 relative to the base block 12 or the base block 12 relative to the slide block 14. It is possible to slide. By relatively shifting both of them by such a mechanism, the height h as the piston removal jig 10 can be adjusted steplessly. For example, when the slide block 14 is slid to the thick side of the base block 12 (left side in FIG. 1A), h can be increased. On the other hand, when the slide block 14 is slid to the thin side of the base block 12 (the right side in FIG. 1A), h decreases. And by having such a function, it becomes possible to gradually extract the piston 40b to be extracted.

  With respect to the piston extraction jig 10 having such a configuration, a usage form thereof will be described with reference to FIG. The caliper 30 shown in FIG. 2 is of a floating type, and particularly shows a state seen from the lower surface. The caliper 30 includes a cylinder portion 32 having a piston projecting surface 42, a claw portion 36 having a reaction force receiving surface 44 facing the piston projecting surface, and a bridge portion 34 that connects the cylinder portion 32 and the claw portion 36. . The caliper 30 in the form shown in FIG. 2 is a two-pot type, and includes two cylinders 38 and 38 in the cylinder portion 32, and pistons 40 a and 40 b are arranged in the respective cylinders 38.

  The piston unloading jig 10 has a piston facing surface γ in the slide block 14 between the piston projecting surface 42 and the reaction force receiving surface 44 with the piston facing surface γ in the slide block 14 and the piston 40b to be extracted. It arrange | positions so that it may come to the position which opposes.

  Here, when the gap between the piston projecting surface 42 and the reaction force receiving surface 44 is large with respect to the height of the piston removal jig 10, the thick portion of the base block 12 moves toward the center with respect to the slide block 14. By sliding the base block 12 so as to move (right side in FIG. 2), the height of the piston removal jig 10 can be increased to match the distance between the piston protruding surface 42 and the reaction force receiving surface 44. Regarding the adjustment of the height of the piston removal jig 10, the operation of loosening the bolt 22, sliding the base block 12, and tightening the loosened bolt 22 with the piston removal jig 10 placed in the caliper 30. Just do it. This eliminates the need for troublesome operations such as removing the piston removal jig 10 from the caliper 30 every time the height is adjusted, measuring and adjusting the dimensions, and returning the caliper 30 to the caliper 30, thus efficiently removing the piston 40 (40a, 40b). Can be performed automatically. Note that whether the slide block 14 is slid or the base block 12 is slid is only the difference in which part is used as a positioning reference, and there is no difference in the effect.

  When air is supplied from a fluid inlet (not shown) of the caliper 30, the piston 40 b protrudes by the force of the air and comes into contact with the piston facing surface γ of the piston removal jig 10.

  From this state, the bolt 22 of the piston removal jig 10 is loosened, the base block 12 is slid to the left in FIG. 2 and adjusted in the direction of decreasing the height h, and then the bolt 22 is tightened. Then, by supplying air again, the piston 40b can be gradually extracted.

  From this point, the distance between the piston facing surface γ and the piston projecting surface 42 is increased by further shifting the base block 12 to the left in FIG. 2, and when this distance exceeds the projecting limit amount of the piston, The piston 40b to be removed is extracted from the cylinder 38. The protrusion limit amount of the piston means the maximum protrusion amount that the piston does not fall out of the cylinder.

  Here, since the overall height of the piston removal jig 10 is reduced by adjusting the height h, a gap is also generated between the thick portion and the piston protruding surface 42 so as to fill the gap. Although the piston 40a protrudes, the protrusion amount of the piston 40a is smaller than the piston 40b by the height of the stepped portion constituting the thin portion. For this reason, even after the piston 40b is removed, the piston 40a remains in the cylinder 38, and only the piston 40a to be extracted can be selectively extracted.

  According to the piston extraction jig 10 having the above configuration, even when the number of pistons 40 is increased, the pistons can be sequentially inserted and removed step by step with a simple configuration and a simple procedure. Is possible. Also, unlike the conventional piston pulling operation in which a plurality of thin plate members are stacked, the height is adjusted by sliding the base block 12 and the slide block 14, and the bolts 22 are fastened so that they are not disassembled during use. Therefore, the safety at the time of piston removal work can be improved. In the above description, the floating type disc brake device (caliper) is taken as an example. However, even an opposed type disc brake device can be dealt with in the same manner.

  In addition, what is shown in FIG. 3 can be mentioned as a piston extraction jig | tool of the form relevant to the piston extraction jig | tool which concerns on this embodiment. The piston removal jig 10a shown in FIG. 3 has a configuration in which only the convex portion 16 serving as a thick portion can be slid horizontally with respect to the base block 12a. By setting it as such a structure, the position of a piston opposing surface can be changed only by loosening the volt | bolt 22 and sliding the convex part 16, and the piston made into extraction object can be changed easily.

  Moreover, what is shown in FIG. 4 can be mentioned as a piston extraction jig | tool of the form relevant to the piston extraction jig | tool which concerns on this embodiment. 4A is a front view of the piston removal jig, FIG. 4B is a diagram showing a cross section taken along the line C-C in FIG. 4A, and FIG. 4C is the same figure. It is a modification which shows CC cross section in. In the piston removal jig shown in FIG. 4, first, the sub-block 17 is disposed at the step portion of the piston facing surface γ which is the concave bottom surface portion of the slide member, and the upper surface portion of the slide block 14 is entirely opposed to the piston. It is characterized by a surface γ ′. By adopting such a configuration, it becomes possible to correspond to a floating type 1 pot caliper and an opposed type 2 pot caliper.

  Second, the concave groove 24 provided in the slide surface β is disposed near the center of the slide surface, and the convex portion 14a is slidably fitted in place of the slide member such as a convex nut. Yes. By setting it as such a structure, the number of parts which comprise the piston extraction jig | tool 10b can be decreased, and a structure can be simplified. As the shapes of the concave groove 24 and the convex portion 14a, in addition to the simple concave and convex shape shown in FIG. 4 (B), a trapezoidal convex portion 14b and a trapezoidal groove 24b as shown in FIG. Groove)).

  Thus, with respect to the concave groove 24 and the convex portion 14a that are slidably fitted, an opening is formed on the side wall of the concave groove 24 on the concave groove forming side (base block 12 in the example of FIG. 4). As described above, the screw holes 12a are formed from the front side of the block (the front side and / or the back side of the base block 12). Then, the bolt 22 is screwed into the screw hole 12a, and the tip of the bolt 22 penetrating the screw hole 12a is brought into contact with one side surface of the convex portion 14a (trapezoidal convex portion 14b), so that the convex portion 14a (convex portion) is obtained. The other side surface of 14b) is pressed against the side surface of the concave groove 24 (trapezoidal groove 24), whereby the frictional force is increased, and the relative position of the base block 12 and the slide block 14 can be fixed. In the example shown in FIG. 4, the bolts 22 are arranged only in one screw hole 12 a, but the bolts 22 are arranged in both the screw holes 12 a provided on both the front and back surfaces, and the tip of the bolt 22 that forms a pair. The convex portion 14a (the trapezoidal convex portion 14b) may be sandwiched between.

  Further, as described above, the piston pulling jig used for the one-pot floating caliper or the two-pot opposed caliper does not require a step portion, and therefore does not have a step portion as shown in FIG. The piston extraction jig 10c having the slide block 14 may be used and can be regarded as a part of the present invention. 5A is a front view of the piston removal jig, FIG. 5B is a diagram showing a cross section taken along the line CC in FIG. 5A, and FIG. It is a modification which shows CC cross section in. Furthermore, a screw hole or a bolt may not be provided on the side surface of the concave / convex fitting portion including the concave groove 24 (trapezoidal groove 24b) and the convex portion 14a (trapezoidal convex portion 14b). In the piston removal jig 10c according to the embodiment, a force is applied in a direction indicated by an arrow EE in a used state. For this reason, by having the concave-convex fitting portion as shown in FIG. 5, it is possible to prevent the displacement in the direction indicated by the arrow FF and the slide block 14 or the base block 12 from falling off. Safety can be improved.

  Next, a second embodiment according to the piston brake jig for a disc brake device of the present invention will be described with reference to FIG. The basic configuration of the piston extraction jig according to the present embodiment is the same as the piston extraction jig according to the first embodiment described above. That is, the slide block is in contact with the base block so as to be slidable obliquely. Therefore, parts having the same function are denoted by reference numerals obtained by adding 100 to the drawings, and detailed description thereof will be omitted.

  The difference from the piston extraction jig 10 according to the first embodiment is the shape of the slide block 114 and the position where the T-shaped groove 124 is formed. The difference in the shape of the slide block 114 is that 3 pots (floating type calipers) or 6 pots are provided such that a concave bottom surface part constituting the piston facing surface γ is provided in the center and convex parts 116b constituting thick parts are arranged at both ends. The form and length correspond to (opposed caliper). The slide block 114 in the form shown in FIG. 6 is intended to pull out the piston located in the center. For example, as shown in FIG. 7, the slide block 114 has a concave bottom part on the right side (or left side) as shown in FIG. When it is provided, either the left or right piston can be targeted for removal.

  The difference in the formation position of the T-shaped groove 124 is that in the piston extraction jig 110 according to this embodiment, the T-shaped groove 124 is formed so as to have an opening on the slide surface δ. With such a configuration, the bolt 122 is disposed in a direction perpendicular to the sliding direction of the sliding surface β and the sliding surface δ through the step hole 126 formed in the base block 112, and is disposed in the T-shaped groove 124. Screwed into the convex nut 120 formed. By arranging the T-shaped groove 124, the bolt 122, and the convex nut 120 in this way, the side surface of the piston removal jig 110 is not provided with irregularities. Therefore, when the piston removal jig 110 is stored, the accommodation property can be improved.

  Moreover, what is shown in FIG. 8 can be mentioned as an application form of the piston extraction jig | tool which concerns on this embodiment. The piston extraction jig shown in FIG. 8 can be said to be a combination of the piston extraction jig 110 according to the second embodiment and the piston extraction jig 10a shown in FIG. Therefore, parts having the same function are denoted by reference numerals obtained by adding 200 to the reference numerals given in FIG. 1 or FIG. 3, and detailed description thereof will be omitted. The outline of the configuration is that slide surfaces β and δ for height adjustment are provided between the base block 212 and the slide block 214, and a slide surface for adjusting the convex portion position is provided between the slide block 214 and the convex portion 216. Blocks are provided to provide each. Further, on the slide surface between the base block 212 and the slide block 214, a height adjusting T-shaped groove 224, a bolt 222, a convex nut 220, and the like are arranged at the center of the side section, that is, the center of the slide surface δ. is doing. On the other hand, on the slide surface between the slide block 214 and the convex portion 216, a T-shaped groove 225, a bolt 222, and a convex nut 220 are arranged on the end of the side cross section, that is, on the side surface of the piston removal jig 210. Yes.

  By arranging the T-shaped groove 224, the bolt 222, and the convex nut 220 as described above, the T-shaped groove, the bolt, and the convex nut do not interfere with each other. It is possible to realize sliding along the same time.

It is a figure which shows the form of the piston extraction jig | tool which concerns on 1st Embodiment. It is a figure which shows the usage type of the piston extraction jig | tool which concerns on 1st Embodiment. It is a figure which shows the structure of the 1st example of the piston extraction jig | tool relevant to this invention. It is a figure which shows the structure of the 2nd example of the piston extraction jig | tool relevant to this invention. It is a figure which shows the structure of the 3rd example of the piston extraction jig | tool relevant to this invention. It is a figure which shows the form of the piston extraction jig | tool which concerns on 2nd Embodiment. It is a figure which shows the modification of the piston extraction jig | tool which concerns on 2nd Embodiment. It is a figure which shows the application form of the piston extraction jig | tool which concerns on this invention. It is a figure which shows the mode of the conventional piston extraction operation | work.

Explanation of symbols

  10 ......... Piston extraction jig (piston extraction jig for disc brake device), 12 ......... Base block, 14 ......... Slide block, 16 ...... Convex, 20 ......... Convex nut, 22 ... ...... Bolt, 22a ... Washer, 24 ......... T-groove, α ......... Bottom, β ... Slide surface, γ ... Piston facing surface, δ ... Slide surface.

Claims (6)

A base block;
A slide block that is slidable on the base block, and has a piston-opposing surface for receiving a piston that is symmetrical with the surface opposite to the arrangement direction of the base block;
A concave groove provided along a sliding direction with respect to a sliding surface formed on an opposing surface of the base block and the sliding block;
Forming a convex portion that can be fitted into the groove;
A piston removal jig of a disc brake device, wherein the slide surface is inclined so that the thickness of the base block changes along the slide direction. On the slide surface,
A slide member disposed in the concave groove instead of the convex portion;
Screwing means for screwing onto the slide member;
The concave groove has a bottom width wider than an opening width, and the screw member is screwed onto the slide member to press the slide member against the opening side wall surface of the concave groove. The piston removal jig of the disc brake device according to claim 1, wherein:   The concave groove is a T-shaped groove, the T-shaped groove is formed so as to straddle the base block and the slide block, and the opening of the groove is disposed on an end line extending in the width direction of the slide surface. The piston removal jig of the disc brake device according to claim 2.   3. The disc brake device according to claim 2, wherein the concave groove is formed in the slide surface on the slide block side, and the screwing means is disposed so as to be orthogonal to the slide direction via the base block. Piston extraction jig.   The concave step portion is formed on the surface of the slide block opposite to the base block arrangement direction, and the concave bottom portion of the step portion is used as the piston facing surface. A piston removal jig for a disc brake device according to any one of the preceding claims.   A convex portion adjacent to the step portion in the slide block is divided from the slide block, and the divided convex portion is configured to be slidable with the concave bottom surface portion and an extension line thereof as a second slide surface. The piston removal jig of the disc brake device according to claim 5.

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