JP2016079986A - Disc brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disc brake device having a structure to reduce a load on a torque supporting pin caused by an outer pad, and effective for miniaturization and reduction of weight.SOLUTION: In a disc brake device 10 having a support 12 fixed to a vehicle, a sleeve 24 supported by the support 12, and a caliper 26 supported through a guide pin 38 slid on the sleeve 24 at an inner side of a rotor 50 and fixing an outer pad 44 to a claw portion 32 positioned at an outer side of the rotor 50, a torque transmission face 30c transmitting outer-side braking torque generated through the outer pad 44 to the sleeve 24 is disposed on a back portion 30 of the caliper 26, and the torque transmission face 30c is positioned at a rotor 50 side with respect to an arrangement position of a pressure plate 44a configuring the outer pad 44 in an axial direction of the rotor 50.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a disc brake device, and more particularly to a disc brake device having a floating caliper.

  Conventionally, in a floating type disc brake device, a ductile having a high material strength is generally used because of the caliper shape. On the other hand, in recent years, there is a high tendency to use an aluminum alloy having a low density as a constituent material because of light weight and good recyclability. However, when an aluminum alloy is used as the constituent material of the caliper, there arises a problem that it is difficult to ensure the strength against the required axial force and the strength against the twisting direction force. For this reason, when the caliper is made of an aluminum alloy, it has been common to adopt a coping method in which the thickness of the back portion is increased to increase the foil size and to secure the installation space.

  However, when the wheel is increased in inches, it is necessary to reduce the flatness of the tire, which causes a problem that the riding comfort is deteriorated and the cost is increased due to the mounting of a large-diameter wheel.

  With respect to such a problem, in the disc brake device disclosed in Patent Literature 1, the outer pad is fastened and fixed to the claw portion of the caliper, and the connection area of the back portion that connects the cylinder portion and the claw portion is widened. Therefore, the rigidity is ensured without increasing the thickness of the back portion. Specifically, a support for supporting the caliper and a notch that exposes a sleeve that serves as a torque receiving part are provided in a part of the back meat part and the claw part, and the outer side of the notch (rotor entry side of the rotor, Alternatively, a back portion (side bridge) that connects the cylinder portion and the claw portion is also provided on the delivery side.

JP 2014-101998 A

  The configuration disclosed in Patent Document 1 is considered to be very effective for securing the caliper strength. However, in the disc brake device configured to support the torque caused by the outer pad with pins (sleeve and guide pins) fixed to the support, it is necessary to increase the diameter of the pin made of steel.

  When the diameter of the pin serving as the torque receiver is increased, not only the weight of the pin itself increases, but also the clearance required between the outer periphery of the rotor and the wheel inner wall increases.

  Therefore, an object of the present invention is to provide a disc brake device that has a structure that is advantageous for reducing the size and weight by reducing the load on the pin that supports the torque caused by the outer pad.

  In order to achieve the above object, a disc brake device according to the present invention includes a support fixed to a vehicle, a pin supported by the support, and supported on the inner side of the rotor via the pin, the outer side of the rotor A disc brake device having a caliper in which an outer pad is fixed to a body located at a body, wherein a torque transmission surface for transmitting an outer side braking torque generated through the outer pad to the pin is provided on a back part of the caliper, The torque transmission surface is located on the rotor side in a rotor axial direction with respect to a pressure plate arrangement position constituting the outer pad.

  Further, in the disc brake device having the above-described characteristics, a through-hole that exposes a part of a portion of the support that supports the pin to the outside of the caliper body is provided in the back meat portion of the caliper. good.

  By adopting such a configuration, it is possible to arrange a part of the support within the thickness range of the back meat part while taking a wide formation area of the back meat part and ensuring the rigidity of the caliper. For this reason, it is not necessary to increase the thickness of the back portion, and the caliper and the support can be arranged in a narrow space between the rotor and the inner wall of the wheel.

  Further, in the disc brake device having the above-described features, the caliper is a connecting portion between the claw portion and the back meat portion, and closes a portion located on the axis of the pin. The disc brake device according to claim 1 or 2.

  With such a configuration, the size of the through-hole provided in the caliper can be minimized, and the caliper rigidity can be increased. Further, by closing the connecting portion between the claw portion and the back portion located on the outer side, it is possible to prevent dust from entering the caliper, a decrease in braking force due to snow damage, and the like.

  Further, in the disc brake device having the above-described characteristics, the caliper is provided between the closing surface of the back meat portion and the torque transmission surface corresponding to a range in which the caliper slides in the axial direction of the rotor. It is desirable to have a non-contact area for the pin.

  With such a configuration, there is no possibility that the pin contacts the caliper when the caliper slides in the axial direction. Further, even when the contact position between the pin and the torque transmission surface changes as the caliper slides, there is no possibility that torque transmission will shift to the pressure plate side of the outer pad.

  In the disc brake device having the above-described characteristics, the non-contact region may be configured by a cast surface.

  With such a configuration, when forming the caliper, a non-contact region can be formed at the casting stage. And by making an inner wall surface into a non-processed surface, while shortening the processing time in formation of a caliper, the lifetime of the cutter used for cutting can be extended.

  Furthermore, in the disc brake device having the above-described characteristics, the torque transmission surface has a release portion that does not restrain the pin on the inner diameter side of the rotor with respect to the radial center position of the pin. good.

  With such a configuration, the caliper can be easily assembled and disassembled with respect to the support.

  According to the disc brake device having the above-described characteristics, it is possible to reduce the load on the pin that supports the torque resulting from the pressing of the outer pad. For this reason, it can be set as a structure advantageous for size reduction and weight reduction.

It is a front view showing the composition of the disc brake device concerning a 1st embodiment. It is a right view which shows the structure of the disc brake apparatus which concerns on 1st Embodiment. It is a rear view which shows the structure of the disc brake device which concerns on 1st Embodiment. It is a figure which shows the structure of the AA cross section in FIG. It is a bottom view showing the composition of the disc brake device concerning a 1st embodiment. It is a structure of the disc brake apparatus which concerns on 2nd Embodiment, and is a figure which shows the structure corresponded in the AA cross section in FIG.

  Hereinafter, embodiments of the disc brake device of the present invention will be described in detail with reference to the drawings. First, the disc brake device according to the first embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a front view showing the configuration of the disc brake device according to the present embodiment. 2 is a right side view thereof, and FIG. 3 is a rear view thereof. Further, FIG. 4 is a view showing a cross section AA in FIG. 1, and FIG. 5 is a bottom view showing a configuration of the disc brake device.

  The disc brake device 10 of the present invention has a basic configuration including a support 12, a pin supported by the support 12, and a caliper 26 supported via the pin.

  The support 12 is fixed to the vehicle body and plays a role of slidably supporting the caliper 26. In the present embodiment, the support 12 is disposed between the cylinder portion 28 (inner side body) and the claw portion 32 (outer side body) of the caliper 26, that is, within the frame of the caliper 26.

  The support 12 includes at least an anchor 14, a bridge 16, a mounting hole 18, and a pin guide portion 20 (see FIG. 4). The anchors 14 are arranged on the entrance side and the exit side of the rotor 50, respectively. In the present embodiment, while supporting the inner pad 22, the inner pad 22 plays a role as a torque receiving portion that receives a force to rotate around the rotor 50 during braking. The inner pad 22 includes a pressure plate 22a made of a steel plate and a lining 22b that is a friction member, and is supported by the support 12 via a part of the pressure plate 22a.

  The bridge 16 is a connection member that connects the anchor 14 disposed on the turn-in side of the rotor 50 and the anchor 14 disposed on the turn-out side. The mounting hole 18 is provided in a connection portion between each anchor 14 and the bridge 16 and is a hole for fastening the support 12 to a mounting hole (not shown) provided in the vehicle via a bolt (not shown). is there.

  The pin guide portion 20 is a through hole provided at the tip of the pair of anchors 14 and located outside the outer periphery of the rotor 50 in the assembled state. The pin guide portion 20 supports a pin to which torque due to an outer pad 44, which will be described in detail later, is transmitted. In the present embodiment, a sleeve 24 formed in a bag shape and a guide pin 38 that slides in the sleeve 24 are arranged as pins.

  In order to reduce the weight of the disc brake device 10, even if the support 12 is made of a light metal such as an aluminum alloy, a steel material such as iron is used for the guide pin 38 that is a sliding member that receives torque. Is done. In such a case, electric corrosion (electrochemical corrosion) occurs between the support 12 and the guide pin 38 due to the difference in the constituent materials, and there is a possibility that the sliding performance is deteriorated. For this reason, the sleeve 24 is disposed at a position where the sliding member comes into contact, and the sleeve 24 is formed of the same material as the guide pin 38, so that the electric corrosion generated between the two can be prevented and the support 12 can be provided. It is also possible to reduce the weight due to the use of a lightweight metal. Further, when the constituent member of the support 12 is softer than the constituent member of the guide pin 38, the pin guide portion 20 may be worn due to sliding, but the hard sleeve 24 is disposed. According to this, there is an effect that this can be prevented.

  The caliper 26 according to the present embodiment includes a cylinder portion 28, a claw portion 32, and a back portion 30 (bridge). The cylinder part 28 is a drive source of the disc brake device 10 according to the embodiment, and includes a piston 40 and a cylinder 34 for accommodating and projecting the piston 40. Further, the cylinder portion 28 is provided with a pin assembly portion 36 for assembling a guide pin 38 to be described later in detail. The pin assembly part 36 is provided so as to be located outside the outer periphery of the rotor 50. This is because the assembled guide pin 38 is positioned outside the outer periphery of the rotor 50 to avoid interference between the rotor 50 and the guide pin 38.

  The guide pin 38 is a rod-like member that is assembled to the pin assembly portion 36 and is inserted into the sleeve 24 provided on the support 12. When the guide pin 38 slides while being supported by the sleeve 24, the caliper 26 is held by the support 12 and can move in the axial direction. Here, the length of the guide pin 38 may be set to such a length as to reach the torque transmission surface provided on the back portion 30 in the assembled state. This is because deformation of the sleeve 24 can be prevented if the guide pin 38 is disposed inside the sleeve 24 when a braking torque is applied to the sleeve 24.

  The claw portion 32 is a reaction force receiver for the pressing force generated by the piston 40. The claw portion 32 is provided with a notch 32 a at a position facing the formation position of the cylinder 34 in the cylinder portion 28. This is because the inner peripheral machining of the cylinder 34 in the cylinder portion 28 is performed using the notch portion 32a. Each block (two blocks in the example shown in the present embodiment) constituting the claw portion 32 is formed with a through hole (not shown) through which a bolt is inserted. The through hole is a step hole, and it is desirable that the bolt head of the bolt 42 used for fastening does not protrude outward. Since the caliper 26 is disposed in a limited space between the rotor 50 and the inner wall of the wheel, by reducing the protruding portion from the caliper 26, it is possible to suppress interference with the wheel and to improve the aesthetics by forming a flat surface. It is because it leads also to improvement of.

  An outer pad 44 is fastened to the inner side of the claw portion 32. Similar to the inner pad 22, the outer pad 44 includes a pressure plate 44 a made of a steel plate and a lining 44 b that is a friction material. For this reason, by fastening the outer pad 44 to the claw portion 32, it is possible to increase the rigidity of the claw portion 32 and to handle the claw portion 32 and the outer pad 44 as an integrated object.

  The cylinder portion 28 and the claw portion 32 are connected by a back portion 30 that straddles the outer side of the outer periphery of the rotor 50. In the disc brake device 10 according to the embodiment, through holes (a center hole 30a and a side hole 30b: see FIG. 5) are provided in the center and both sides of the back portion 30. The purpose of the center hole 30a is to make it easy to visually check how the linings 22b and 44b are reduced in the brake pads (the inner pad 22 and the outer pad 44), and to contribute to the heat radiation generated during braking. Yes. The side hole 30b is provided for the purpose of securing the area of the back portion 30 while exposing the pin guide portion 20 in the support 12 to the outside of the caliper 26 and avoiding interference between the support 12 and the caliper 26. . When the caliper 26 is made of a lightweight metal such as an aluminum alloy, in order to ensure the rigidity of the back portion 30, the area connecting the cylinder portion 28 and the claw portion 32 is increased or the thickness of the back portion 30 is increased. It needs to be thick.

  Here, when the thickness of the spine portion 30 is increased, the caliper 26 may not fit between the inner wall of the wheel constituting the wheel and the outer periphery of the rotor 50. In this case, it is necessary to take measures such as inch up of the wheel and size reduction of the rotor 50. In such a case, for example, when the wheel is increased in inches, it is necessary to reduce the flatness of the tire, which may cause a deterioration in riding comfort or increase in cost due to the mounting of a large-diameter wheel. Further, when the size of the rotor 50 is reduced, it is necessary to ensure a wide pressing surface when the diameter of the piston 40 is increased and the same hydraulic pressure is applied to the rotor 50. This is because when a high pressing force is applied to the rotor 50 by increasing the hydraulic pressure, the spread between the cylinder portion 28 and the claw portion 32 that occurs during braking increases. Further, when the large-diameter piston 40 is employed, there are concerns that problems such as an increase in weight and deterioration of the touch feeling of the pedal during a brake operation may occur.

  On the other hand, the side wall 30b is provided in the back portion 30 so as to avoid the interference between the support 12 and the caliper 26, so that the rotor 50 is turned in and out more than the pin guide portion 20 in the support 12. The formation surface of the back meat part 30 can be expanded to the side. Thereby, it becomes possible to ensure the desired rigidity without increasing the thickness of the back portion 30.

  The back portion 30 is formed with a torque transmission surface 30 c for transmitting the outer side braking torque generated through the outer pad 44 to the sleeve 24. The torque transmission surface 30 c is provided on the extended position of the sleeve 24 in a state where the caliper 26 is assembled to the support 12. The torque transmission surface 30 c is provided on the inner side of the outer pad 44, which is fastened to the claw portion 32, on the inner side, that is, on the rotor 50 arrangement side. The torque transmission surface 30c is configured by a surface that can come into contact with the rotor 50 on the outer peripheral surface of the sleeve 24 during braking. For this reason, the extension length of the sleeve 24 arranged in the pin guide portion 20 of the support 12 only needs to have a length such that its side surface can abut against the torque transmission surface 30c in the assembled state.

  With such a configuration, braking torque generated via the outer pad 44 is transmitted to the sleeve 24 (pin) via the claw portion 32. In addition, since the torque transmission surface 30c is positioned closer to the inner side than the fastening position of the pressure plate 44a constituting the outer pad 44, the distance from the extending base point of the sleeve 24 to the torque transmission surface 30c is the braking torque. It can be made shorter than the case of being transmitted directly from 44a. For this reason, the stress applied to the extending base point of the sleeve 24 can be reduced, and the weight can be reduced by reducing the diameter of the sleeve 24. Further, by providing the torque transmission surface 30c on the inner side, a thick portion can be provided in a part of the back portion 30, and the rigidity of the caliper 26 can be increased.

  Further, in the assembled state, a portion that is on the axis line in the extending direction of the sleeve 24 and that corresponds to the connecting portion between the claw portion 32 and the back portion 30 is the closed surface 31. This is to minimize the formation range of the side hole 30b and ensure the rigidity of the caliper 26. Further, by providing the closing surface 31 at the connecting portion between the claw portion 32 and the back meat portion 30 located on the outer side, it is possible to effectively prevent dust from entering from outside and snow damage. Further, a non-contact region 46 with respect to the sleeve 24 is provided between the closing surface 31 and the torque transmission surface 30 c in a range corresponding to a range in which the caliper 26 slides in the axial direction of the rotor 50.

  With this configuration, there is no possibility that the sleeve 24 contacts the caliper 26 when the caliper 26 slides in the axial direction. Further, even when the contact position between the sleeve 24 and the torque transmission surface 30c changes as the caliper 26 slides, there is no possibility that the transmission of torque shifts to the pressure plate 44a side of the outer pad 44.

  Here, the non-contact area | region 46 can be comprised by the non-processed surface, ie, a casting surface. By forming the non-contact region 46 by casting, it is possible to shorten the processing time for forming the caliper 26 and extend the life of the blade used for cutting.

  Further, the torque transmission surface 30 c has a release portion that does not restrain the sleeve 24 on the inner diameter side of the rotor 50 with respect to the radial center position of the sleeve 24. This is because by providing the release portion, it is possible to easily assemble and disassemble the caliper 26 with respect to the support 12.

  Thus, according to the disc brake device 10 having the above-described features, the load on the pins (the sleeve 24 and the guide pins 38) that support the torque caused by the outer pad 44 is reduced, and the size and weight are reduced. It can be set as a structure advantageous to.

Next, a second embodiment of the disc brake device of the present invention will be described with reference to FIG.
The basic configuration of the disc brake device 10A of the embodiment shown in FIG. 6 is the same as that of the disc brake device 10 according to the first embodiment described above. The disc brake device 10A according to the present embodiment is characterized in that an anchor pin 24A is arranged as a pin provided in the pin guide portion 20 of the support 12 instead of the sleeve 24 (see FIG. 4).

  The anchor pin 24 </ b> A is a pin that protrudes from the support 12 toward the outer side, that is, the rotor 50 arrangement side. The anchor pin 24A of the present embodiment has an anchor portion 24Aa that protrudes toward the outer side and a protrusion portion 24Ab that penetrates the pin guide portion 20 of the support 12, and the protrusion portion 24Ab that penetrates the support 12 has a male screw portion. Is provided. Furthermore, an opening is provided at the end of the projecting portion 24Ab that penetrates the support 12, and a bag hole is formed in the axial direction from the opening.

  A nut 24B as a lock member is screwed into the male screw portion provided in the protruding portion 24Ab. A flange is provided at the base end portion of the anchor portion 24Aa to prevent the anchor portion 24Aa from coming off. For this reason, the anchor pin 24A can be fixed in a state in which the support 12 is sandwiched by screwing and tightening the nut 24B to the projecting portion 24Ab that penetrates the pin guide portion 20.

  By adopting such a configuration, even when the support 12 is thinned, it is possible to secure a sufficient tightening allowance for fixing the anchor pin 24A. Therefore, even when the support 12 is thinned, the anchor pin 24A can be firmly fixed.

  As described above, even when the pin configuration is changed, the arrangement of the torque transmission surface 30c is set to the inner side with respect to the arrangement position of the pressure plate 44a of the outer pad 44, whereby the disk according to the first embodiment described above. An effect similar to that of the brake device 10 can be obtained.

  In each of the above embodiments, the guide pin 38 fixed to the caliper 26 is disposed in the hole disposed on the support 12 side. However, in configuring the disc brake device according to the present invention, the caliper 26 slides with respect to the pin extended to the inner side so that the pin extends to both the inner side and the outer side as the support 12 base point. You may make it let it.

  If the pin (anchor pin 24A) extended to the outer side can come into contact with the torque transmission surface 30c provided on the inner side of the pressure plate of the inner pad 22, the first and second embodiments are concerned. This is because the same effects as those of the disc brake devices 10 and 10A can be obtained.

10 ......... Disc brake device, 12 ......... Support, 14 ......... Anchor, 16 ......... Bridge, 18 ......... Mounting hole, 20 ......... Pin guide, 22 ...... Inner pad, 22a ... ...... Pressure plate, 22b ......... Line, 24 ......... Sleeve, 26 ......... Caliper, 28 ...... Cylinder, 30 ......... Back meat, 30a ......... Center hole, 30b ......... Side Hall, 30c ......... Torque transmission surface, 31 ......... Occlusion surface, 32 ......... Claw, 34 ......... Cylinder, 36 ......... Pin assembly, 38 ......... Guide pin, 40 ......... Piston, 42 ......... Bolt, 44 ......... Outer pad, 44a ......... Pressure plate, 44b ......... Lining, 46 ......... Non-contact area, 50 ...... Rotor.

Claims (6)

A disc brake device having a support fixed to a vehicle, a pin supported by the support, and a caliper that is supported on the inner side of the rotor via the pin and has an outer pad fixed to a body located on the outer side of the rotor. There,
The caliper is provided with a torque transmission surface for transmitting an outer side braking torque generated through the outer pad to the pin on the back meat portion of the caliper,
The disk brake device according to claim 1, wherein the torque transmission surface is located closer to the rotor side than a pressure plate arrangement position constituting the outer pad in the rotor axial direction.   2. The disc brake device according to claim 1, wherein the caliper has a through hole that exposes a part of a portion of the support that supports the pin to the outside of the caliper body.   3. The disc brake device according to claim 1, wherein the caliper is a connecting portion between a claw portion and the back meat portion and closes a portion located on an axis of the pin.   A non-contact region for the pin is provided between the closed surface of the back meat portion and the torque transmission surface, corresponding to a range in which the caliper slides in the axial direction of the rotor. The disc brake device according to claim 3.   The disc brake device according to claim 4, wherein the non-contact region is formed by a casting surface.   The said torque transmission surface has a release part which does not restrain the said pin in the inner diameter side with respect to the said rotor rather than the radial direction center position of the said pin. Disc brake device.

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