WO2022044568A1 - ディスクブレーキ装置 - Google Patents
ディスクブレーキ装置 Download PDFInfo
- Publication number
- WO2022044568A1 WO2022044568A1 PCT/JP2021/025961 JP2021025961W WO2022044568A1 WO 2022044568 A1 WO2022044568 A1 WO 2022044568A1 JP 2021025961 W JP2021025961 W JP 2021025961W WO 2022044568 A1 WO2022044568 A1 WO 2022044568A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- disc
- brake
- retainer
- brake device
- disc brake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/228—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a separate actuating member for each side
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/005—Components of axially engaging brakes not otherwise provided for
- F16D65/0068—Brake calipers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
- F16D65/095—Pivots or supporting members therefor
- F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
- F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
- F16D65/0974—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
- F16D65/0977—Springs made from sheet metal
Definitions
- the present invention relates to a disc brake device.
- a pair of brake pads press the brake disc by operating a piston housed in a brake caliper.
- the pair of brake pads brake the brake disc.
- Each of the pair of brake pads comprises a friction material and a back plate. Each friction material comes into contact with the brake disc.
- Each back plate is provided on the back surface of the friction material.
- the pair of brake pads are held by the brake calipers by bringing the retainer into contact with each back plate.
- the narrower the retainer the lighter the retainer.
- parts may accidentally enter between a pair of brake pads (gap between each friction material) during maintenance of a vehicle equipped with a disc brake device. As a result, the work time for maintenance may increase.
- the present invention aims to solve the above-mentioned problems.
- the disc brake device includes a brake disc, a brake caliper provided so as to straddle the brake disc, a piston housed in the brake caliper, and an operation of the piston housed in the brake caliper.
- a disc brake device including a pair of brake pads for pinching the brake disc and a retainer provided on the brake caliper and holding the pair of brake pads on the brake caliper by abutting against the pair of brake pads.
- Each of the pair of brake pads is attached to a friction material having a contact surface in contact with the side surface of the brake disc, and one surface is attached to the back surface opposite to the contact surface of the friction material, and the other.
- a back plate whose surface is pressed against the piston is provided, and at least a part of the retainer is radially outside the brake disc with respect to each friction material, at substantially the same height as each back plate, and.
- the brake discs are provided at substantially the same position in the circumferential direction.
- At least a part of the retainer and each back plate are provided at substantially the same height and at substantially the same position. This makes it difficult for foreign matter to enter between the pair of brake pads (gap between the friction materials).
- One end of the retainer in the circumferential direction and one end of the back plate in the circumferential direction are substantially the same height outside the brake disc in the radial direction with respect to each friction material and in the circumferential direction. It may be provided at substantially the same position in.
- one end of the retainer and one end of each back plate are substantially the same height outside the radial direction of the brake disc with respect to each friction material, and are substantially the same position in the circumferential direction of the brake disc. It is provided in. This makes it possible to prevent foreign matter from entering between the pair of brake pads.
- the width of one end of the retainer across the center line of the brake caliper may be substantially the same as the width of the gap between the friction materials across the center line.
- the width of one end of the retainer and the width of the gap between each friction material are substantially the same. This makes it possible to prevent foreign matter from entering the gaps between the friction materials while making the retainer as small and lightweight as possible.
- the retainer is provided on the central portion side of the brake caliper in the circumferential direction with respect to one end of the retainer, has an abutting portion that abuts on each of the back plates, and has a center line of the brake caliper of the retainer.
- the width straddling the above may be narrowed from the contact portion toward one end of the retainer.
- the width of the retainer is narrowed from the contact portion toward one end of the retainer. This makes it possible to reliably hold the pair of brake pads on the brake caliper while reducing the size and weight of the retainer. Further, the width of the contact portion is wider than the width of one end portion of the retainer. This makes it possible to reliably prevent foreign matter from entering the gaps between the friction materials.
- the retainer further has a connecting portion that connects the contact portion and one end portion of the retainer, and the width of the connecting portion across the center line straddles the center line of the gap between the friction materials. It may be wider than the width.
- the width of the connecting portion is wider than the width of the gap between each friction material. This makes it possible to reliably prevent foreign matter from entering the gap.
- the width of the connecting portion across the center line may be smaller than the distance between the back plates.
- the width of the connecting part is narrower than the distance between the back plates. This makes it possible to avoid interference between the retainer and each back plate.
- Each of the back plates is provided on the central portion side in the circumferential direction with respect to one end of the back plate, and has a protrusion protruding outward in the radial direction of the brake disc with respect to the friction material.
- the contact portion has a shape that curves toward each back plate and abuts on each of the protrusions, and the connecting portion may have a flat plate shape.
- the contact portion is curved toward each back plate and is in contact with the protrusion.
- the pair of brake pads can be held in the circumferential direction and the radial direction of the brake disc with respect to the brake caliper.
- the connecting portion has a flat plate shape, it is possible to make a mark or the like on the surface of the connecting portion to prevent erroneous assembly.
- the retainer may be tapered stepwise from the contact portion toward one end of the retainer.
- the retainer gradually becomes thinner from the contact portion toward one end of the retainer. As a result, each of the above-mentioned effects can be easily obtained.
- One end of the retainer may engage with a recess provided in the brake caliper.
- one end of the retainer engages with the recess. Therefore, it is not necessary to widen the width of one end of the retainer in order to fix it to one end of the retainer. As a result, one end of the retainer can be made thinner to suppress the enlargement of the retainer. As a result, the retainer can be further reduced in size and weight.
- one end of the retainer and one end of each back plate are respectively. May be provided on either the disc turn-in side or the disc turn-out side.
- one end of the retainer and one end of each back plate are provided on either the disk entry side or the disk exit side.
- one end of the retainer and one end of each back plate may be provided under the disc brake device.
- one end of the retainer and one end of each back plate are provided under the disc brake device.
- the retainer extends along the circumferential direction so as to cover the gap formed between the friction materials on the radial outer side of the brake disc with respect to the friction materials, and the end portion of each back plate. Each may project radially outward of the brake disc with respect to the friction material.
- the retainer extends along the circumferential direction so as to cover the gap between the friction materials, and one end of each back plate protrudes radially outward of the friction material with respect to the friction material. This makes it possible to reliably prevent foreign matter from entering the gaps between the friction materials.
- FIG. 1 is a right side view of a front wheel portion of a two-wheeled vehicle equipped with a disc brake device according to the present embodiment.
- FIG. 2 is a rear view of the disc brake device.
- FIG. 3 is a partial perspective view of the disc brake device.
- FIG. 4 is a partial rear view of the disc brake device.
- FIG. 5 is a cross-sectional view taken along the line VV of FIG.
- FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG.
- FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG.
- the disc brake device 10 As shown in FIG. 1, the disc brake device 10 according to the present embodiment is mounted on the vehicle as a wheel brake device.
- FIG. 1 illustrates a case where the disc brake device 10 is applied to the brake device of the front wheel 14 of the motorcycle 12 as an example. Further, in the description of the present embodiment, the front-rear, left-right, and up-down directions will be described with the traveling direction of the motorcycle 12 (right direction in FIG. 1) as the front.
- the disc brake device 10 is not limited to the example of FIG.
- the disc brake device 10 is provided on the wheels (front wheels 14 or rear wheels) of various vehicles such as unicycles, tricycles, and four-wheeled vehicles.
- the component on the left side of the components of the disc brake device 10 may be described by adding the letter “L” after the reference number. Further, the component on the right side may be described by adding the letter “R” after the reference number. Further, the front component may be described by adding the letter “F” after the reference digit. Furthermore, the rear component may be described by adding the letter "B” after the reference digit.
- the disc brake device 10 includes a brake disc 16.
- the brake disc 16 is a metal annular plate-shaped member.
- the brake disc 16 is provided on the right side of the front wheel 14.
- the brake disc 16 is connected to the front wheel 14 so as to be substantially coaxial with the axle 22 of the front wheel 14. Therefore, the brake disc 16 rotates integrally with the front wheel 14.
- the disc brake device 10 further includes a brake caliper 20.
- the brake caliper 20 is provided with an axle support portion 24 at the tip of the front fork 18 attached to the front fork 18 on the right side of the front wheel 14.
- the axle support portion 24 pivotally supports the axle 22.
- a bracket 26 extending to the right rear of the front wheel 14 is connected to the axle support portion 24. As shown in FIGS. 1 to 7, the brake caliper 20 is supported by the bracket 26 so as to straddle the brake disc 16.
- the double-headed arrow C indicates the circumferential direction of the front wheel 14 and the brake disc 16.
- the arrow of Cr indicates the rotation direction of the front wheel 14 and the brake disc 16.
- One end of the brake caliper 20 (one end in the rotation direction Cr) is the disc turning side 28.
- the other end of the brake caliper 20 (the other end in the rotation direction Cr) is the disc rotation side 30.
- the disc turning side 28 is the side (entrance side) where the brake disc 16 enters the brake caliper 20 when the motorcycle 12 moves forward. That is, when the front wheel 14 rotates when the two-wheeled vehicle 12 moves forward, the brake disc 16 enters the disc turning side 28.
- the disc rotation side 30 is the side (exit side) from which the brake disc 16 comes out of the brake caliper 20 when the motorcycle 12 moves forward. That is, when the front wheel 14 rotates when the two-wheeled vehicle 12 moves forward, the brake disc 16 exits from the disc rotation side 30.
- the brake caliper 20 is supported by the bracket 26 on the right rear side of the front wheel 14.
- the brake caliper 20 extends substantially in the vertical direction along the brake disc 16. Since the brake caliper 20 is located behind the front wheel 14, the lower side of the brake caliper 20 is the disc turning side 28. Further, the upper side of the brake caliper 20 is the disc rotation side 30. For example, when the brake caliper 20 is arranged on the right front side of the front wheel 14, the lower side of the brake caliper 20 is the disc rotation side 30. Further, in this case, the upper side of the brake caliper 20 is the disc turning side 28. In the following description, a case where the brake caliper 20 is arranged as shown in FIGS. 1, 2 and 5 will be described.
- the brake caliper 20 has a pair of working portions 32L and 32R, one bridge portion 34B, and the other bridge portion 34F.
- the brake disc 16 is arranged on the center line CL of the brake caliper 20.
- the pair of acting portions 32L and 32R are arranged on both the left and right sides with the brake disc 16 interposed therebetween.
- One bridge portion 34B connects a pair of working portions 32L and 32R on the radial outer side of the brake disc 16.
- One bridge portion 34B connects a pair of action portions 32L and 32R on the disk turning side 28.
- the other bridge portion 34F connects a pair of working portions 32L and 32R on the radial outer side of the brake disc 16.
- the other bridge portion 34F connects a pair of acting portions 32L and 32R on the disk rotation side 30.
- the pair of working portions 32L and 32R extend in a substantially arc shape along the brake disc 16. Therefore, the brake disc 16 has entered the gap 35 of the pair of acting portions 32L and 32R.
- the brake disc 16 rotates in the rotation direction Cr at an intermediate position in the left-right direction of the gap 35.
- the left-right direction of the gap 35 is also the axial direction of the brake disc 16, the axial direction of the front wheels 14, and the vehicle width direction of the two-wheeled vehicle 12. Further, the intermediate position is located on the center line CL of the brake caliper 20.
- Insertion holes 36B and 36F are formed on the disc entry side 28 and the disk exit side 30 of the working portion 32R on the right side, respectively.
- the working portion 32R on the right side is fixed to the bracket 26 by two mounting bolts (not shown) through which the insertion holes 36B and 36F are inserted.
- each of the bridge portions 34B and 34F protrudes outward in the radial direction of the brake disc 16 from the pair of working portions 32L and 32R. Further, each of the bridge portions 34B and 34F connects a pair of action portions 32L and 32R. Therefore, as shown in FIGS. 2, 4 and 5 to 7, the pair of acting portions 32L and 32R and the two bridge portions 34B and 34F form an opening 40 that opens rearward.
- the pair of acting portions 32L and 32R are formed with protruding portions 42L and 42R that bulge backward.
- the two protruding portions 42L and 42R are formed at the central portion (central portion in the circumferential direction C) of the pair of acting portions 32L and 32R.
- the two protrusions 42L and 42R are formed in the intermediate portion between the two bridge portions 34B and 34F.
- a hanger pin 44 extending in the left-right direction penetrates the two protrusions 42L and 42R.
- the disc brake device 10 further includes a plurality of pistons 46L and 46R and a pair of brake pads 48L and 48R.
- the plurality of pistons 46L and 46R and the pair of brake pads 48L and 48R are housed in the brake caliper 20. That is, the gap 35 between the pair of working portions 32L and 32R forms the brake pad accommodating chamber 50.
- the pair of brake pads 48L and 48R are housed in the brake pad storage chamber 50.
- the plurality of pistons 46L and 46R are housed in a pair of working portions 32L and 32R.
- two cylinder holes 52L are formed in the working portion 32L on the left side.
- the two cylinder holes 52L extend in the left-right direction.
- the two cylinder holes 52L are open toward the brake disc 16.
- One cylinder hole 52L is formed between the protruding portion 42L and the one bridge portion 34B.
- the other cylinder hole 52L is formed between the protruding portion 42L and the other bridge portion 34F. That is, the two cylinder holes 52L are formed on the front side and the rear side (upper side and lower side) of the left working portion 32L, respectively.
- a piston 46L is housed in each cylinder hole 52L.
- a hydraulic chamber 54L is formed between each cylinder hole 52L and each piston 46L.
- two cylinder holes 52R are formed in the working portion 32R on the right side.
- the two cylinder holes 52R extend in the left-right direction.
- the two cylinder holes 52R are open toward the brake disc 16.
- One cylinder hole 52R is formed between the protruding portion 42R and the one bridge portion 34B.
- the other cylinder hole 52R is formed between the protruding portion 42R and the other bridge portion 34F. That is, the two cylinder holes 52R are formed on the front side and the rear side (upper side and lower side) of the right working portion 32R, respectively.
- Each of the two cylinder holes 52R is formed so as to face the two cylinder holes 52L of the working portion 32L on the left side.
- a piston 46R is housed in each cylinder hole 52R.
- a hydraulic chamber 54R is formed between each cylinder hole 52R and each piston 46R.
- the brake caliper 20 is an opposed piston type 4-pot caliper.
- the pair of brake pads 48L and 48R brake the brake disc 16 due to the operation of the pistons 46L and 46R, respectively. Therefore, the number of the pistons 46L and 46R accommodated in the brake caliper 20 may be any number.
- piston seals 53L and 53R are arranged on the inner wall portions of the left and right acting portions 32L and 32R, respectively. The piston seals 53L and 53R are in sliding contact with the pistons 46L and 46R, respectively, to hold the hydraulic chambers 54L and 54R in a liquid-tight manner with the brake fluid.
- dust seals 55L and 55R are arranged on the inner wall portions of the left and right acting portions 32L and 32R, respectively.
- the dust seals 55L and 55R are arranged close to the brake pad accommodating chamber 50 with respect to the piston seals 53L and 53R. By sliding the dust seals 55L and 55R into contact with the pistons 46L and 46R, it is possible to prevent dust such as wear powder generated by the brake pads 48L and 48R from entering the cylinder holes 52L and 52R.
- the brake pad accommodating chamber 50 includes the inner surface of the pair of working portions 32L and 32R on the brake disc 16 side, the inner surfaces of the two bridge portions 34B and 34F facing each other, and the bottom portion 56 of the brake caliper 20 on the radial inside of the brake disc 16. And formed by.
- the inner surfaces of the two bridge portions 34B and 34F facing each other are side surfaces orthogonal to the circumferential direction C and extending in the left-right direction.
- the bottom 56 of the brake caliper 20 extends toward the brake disc 16 from the bottom of the pair of working portions 32L and 32R (the portion of the pair of working portions 32L and 32R located on the inner side of the brake disc 16 in the radial direction). This is the part that is.
- Each of the pair of brake pads 48L and 48R includes a friction material 58L and 58R and a back plate 60L and 60R.
- Each of the friction materials 58L and 58R has a contact surface (side surface facing the brake disc 16) that contacts the side surface of the brake disc 16.
- Each of the friction materials 58L and 58R extends in an arc shape along the circumferential direction C.
- the contact surfaces of the friction materials 58L and 58R are in sliding contact with the brake disc 16.
- the back plates 60L and 60R are attached to the back surface (side surface separated from the brake disc 16) on the side opposite to the contact surface of the friction materials 58L and 58R.
- Each of the back plates 60L and 60R is a metal plate having a substantially arc shape.
- One surface of each of the back plates 60L and 60R is attached to the back surface of the friction materials 58L and 58R.
- the other surface of each back plate 60L, 60R faces the pistons 46L, 46R
- each of the back plates 60L and 60R is in contact with the bottom portion 56 of the brake caliper 20. Further, the side surface of the disc entry side 28 of each of the back plates 60L and 60R can come into contact with the inner surface of one of the bridge portions 34B. Further, the side surface of the disc feeding side 30 of each of the back plates 60L and 60R can come into contact with the inner surface of the other bridge portion 34F.
- a plurality of protrusions 62L, 62R, 64L, 64R, 66L, 66R, 68L, 68R are formed on each of the back plates 60L and 60R (see FIGS. 3 and 5).
- the plurality of protrusions 62L, 62R, 64L, 64R, 66L, 66R, 68L, 68R are formed on the back surface (diameter outer surface) of each of the back plates 60L, 60R.
- the plurality of protrusions 62L, 62R, 64L, 64R, 66L, 66R, 68L, 68R project to the rear of the brake disc 16 (outward in the radial direction of the brake disc 16).
- protrusions 62L, 62R, 64L, 64R, 66L, 66R, 68L, 68R project to the rear of the friction materials 58L, 58R (outward in the radial direction of the brake disc 16).
- protrusions 70L and 70R are formed on the central portion of the back surface of each of the back plates 60L and 60R (the central portion in the circumferential direction C).
- the protrusions 70L and 70R correspond to the protrusions 42L and 42R of the action portions 32L and 32R.
- a hanger pin 44 penetrates each of the protrusions 70L and 70R.
- the protrusions 62L and 62R are located at the ends of the disc entry side 28 of the back plates 60L and 60R.
- the protrusions 62L and 62R project outward from the back surface of the back plates 60L and 60R in the radial direction of the brake disc 16.
- Each of the protrusions 62L and 62R can come into contact with the inner surface of one of the bridge portions 34B.
- the protrusions 64L and 64R are located at the ends of the disc rotation side 30 of the back plates 60L and 60R.
- the protrusions 64L and 64R project outward from the back surface of the back plates 60L and 60R in the radial direction of the brake disc 16.
- the protrusions 64L and 64R can come into contact with the inner surface of the other bridge portion 34F.
- the protrusions 66L and 66R are located on the disc entry side 28 (on the upstream side of the circumferential direction C and the rotation direction Cr) with respect to the protrusions 70L and 70R at the center of the back plates 60L and 60R.
- the protrusions 66L and 66R project outward from the back surface of the back plates 60L and 60R in the radial direction of the brake disc 16.
- the amount of protrusion of each of the protrusions 66L and 66R on the radial side of the brake disc 16 is smaller than the amount of protrusion of the protrusions 70L and 70R on the radial side of the brake disc 16.
- the tip surface (the back surface on the outer side in the radial direction) of each of the protrusions 66L and 66R is inclined toward the tip of the protrusions 70L and 70R.
- the protrusions 68L and 68R are located on the disk rotation side 30 (downstream side of the circumferential direction C and the rotation direction Cr) with respect to the protrusions 70L and 70R of the back plates 60L and 60R.
- the protrusions 68L and 68R project outward from the back surface of the back plates 60L and 60R in the radial direction of the brake disc 16.
- the amount of protrusion of the protrusions 68L and 68R on the radial outer side of the brake disc 16 is smaller than the amount of protrusion of the protrusions 70L and 70R on the radial side of the brake disc 16.
- the tip surface (the back surface on the outer side in the radial direction) of each of the protrusions 68L and 68R is inclined toward the tip of the protrusions 70L and 70R.
- the back plates 60L and 60R (projections 62L, 62R, 64L and 64R) come into surface contact with the inner surfaces of the two bridge portions 34B and 34F, whereby the circumferential direction C Positioned to. Further, in the pair of brake pads 48L and 48R, the back plates 60L and 60R are in surface contact with the bottom portion 56 of the brake caliper 20. Further, the back plates 60L and 60R are pivotally supported by the hanger pin 44. As a result, the pair of brake pads 48L and 48R are positioned in the radial direction of the brake disc 16. In this way, the pair of brake pads 48L and 48R are accommodated in the brake pad accommodating chamber 50.
- the brake caliper 20 further includes a retainer 72.
- the retainer 72 elastically urges the pair of brake pads 48L and 48R.
- the pair of brake pads 48L and 48R are held by the urging force from the retainer 72 at the bottom 56 of the brake caliper 20.
- the retainer 72 is a leaf spring member extending along the circumferential direction C.
- the retainer 72 covers the gap 74 between the friction materials 58L and 58R on the radial outer side of the brake disc 16.
- Wr the width in the left-right direction of the retainer 72
- the width of each part of the retainer 72 in the left-right direction may be described by adding lowercase letters of the alphabet after Wr.
- the retainer 72 has an arcuate portion 72a.
- the arcuate portion 72a is locked in the radial direction of the central portion of the hanger pin 44.
- the following components are sequentially connected to the portion of the arc-shaped portion 72a on the disk turning side 28.
- the contact portion 72b is connected to the arc-shaped portion 72a.
- the contact portion 72b is located on the disc entry side 28 with respect to the arcuate portion 72a.
- the contact portion 72b is a wide (width Wra) portion that is curved and abuts on the protrusions 66L and 66R of the back plates 60L and 60R.
- a connecting portion 72c is connected to the abutting portion 72b.
- the connecting portion 72c is located on the disc entry side 28 with respect to the contact portion 72b.
- the connecting portion 72c is formed in a flat plate shape.
- the width Wrh of the connecting portion 72c is substantially the same as the width of the arcuate portion 72a.
- the entry side end portion 72d is connected to the connecting portion 72c.
- the entry side end portion 72d is located on the disk entry side 28 with respect to the connecting portion 72c.
- the width Wre of the entry side end portion 72d is narrower than the width Wrh of the connecting portion 72c.
- a recess 76 is formed in the central portion (central portion in the left-right direction) of the inner surface of one of the bridge portions 34B. The entry-side end 72d is locked in the recess 76.
- a connecting portion 72e is connected to the arc-shaped portion 72a.
- the connecting portion 72e is located on the disk rotation side 30 with respect to the arcuate portion 72a.
- the connecting portion 72e is formed in a flat plate shape.
- the width of the connecting portion 72e is substantially the same as the width of the arcuate portion 72a.
- the contact portion 72f is connected to the connecting portion 72e.
- the contact portion 72f is located on the disk rotation side 30 with respect to the connecting portion 72e.
- the contact portion 72f is a wide portion that abuts on the protrusions 64L and 64R of the back plates 60L and 60R in a curved state.
- the contact portion 72f is the exit side end portion of the retainer 72.
- the contact portion 72b of the retainer 72 abuts on the protrusions 66L and 66R of the back plates 60L and 60R. Further, the contact portion 72f of the retainer 72 abuts on the protrusions 64L and 64R of the back plates 60L and 60R.
- the pair of brake pads 48L and 48R are urged inward in the radial direction of the brake disc 16. Further, the pair of brake pads 48L and 48R are also urged on the disc feeding side 30. As a result, even if there is some rattling between the pair of brake pads 48L and 48R and the brake caliper 20, the pair of brake pads 48L and 48R accommodated in the brake pad accommodating chamber 50 can be held by the brake caliper 20.
- the pair of brake pads 48L and 48R slide in the circumferential direction C (rotational direction Cr) due to the rotational force of the brake disc 16.
- the protrusions 64R and 64L of the back plates 60R and 60L come into contact with the inner surface of the bridge portion 34F. Therefore, the inner surface of the bridge portion 34F functions as a torque receiving surface acting on the pair of brake pads 48L and 48R.
- the disc brake device 10 has the following characteristic configurations with respect to the structure of the retainer 72 and the back plates 60L and 60R.
- At least a part of the retainer 72 and the back plates 60L and 60R are at substantially the same height on the radial outer side of the brake disc 16. Further, at least a part of the retainer 72 and the back plates 60L and 60R are provided at substantially the same position in the circumferential direction C of the brake disc 16. Specifically, the turn-in side end portion 72d (one end portion) of the retainer 72 is located radially outside the brake disc 16 with respect to the friction materials 58L and 58R. That is, the turn-in side end portion 72d protrudes radially outward of the brake disc 16 with respect to the friction materials 58L and 58R.
- the protrusions 62L and 62R (one end) of the back plates 60L and 60R are located radially outside the brake disc 16 with respect to the friction materials 58L and 58R. That is, the protrusions 62L and 62R project outward in the radial direction of the brake disc 16 with respect to the friction materials 58L and 58R.
- the turn-in side end portion 72d (one end portion) of the retainer 72 and the protrusions 62L and 62R (one end portion) of the back plates 60L and 60R are located at substantially the same height in the vertical direction. Further, the turn-in side end portion 72d of the retainer 72 and the protrusions 62L and 62R of the back plates 60L and 60R are provided at substantially the same position in the circumferential direction C.
- the width Wr of the retainer 72 (the width Wr of the retainer 72 straddling the center line CL) is transferred from the contact portion 72b to the entry side end portion 72d. It is getting thinner toward you.
- the retainer 72 has Wra (width of the contact portion 72b), Wrh (width of the connecting portion 72c), and Wre from the contact portion 72b toward the entry side end portion 72d. In the order of (width of the end portion 72d on the entry side), the thickness is gradually reduced.
- width Wre of the turn-in side end portion 72d is substantially the same as the width Wg (width Wg of the gap 74 straddling the center line CL) in the left-right direction of the gap 74 of the friction materials 58L and 58R (Wre ⁇ Wg). ).
- the width Wre of the entry side end portion 72d is slightly narrower than the width Wg of the gap 74 because the gap 74 is illustrated.
- the widths Wre and Wg of both may be the same width.
- the width Wre of the entry side end portion 72d may be slightly wider than the width Wg of the gap 74. That is, the width Wre of the turn-in side end portion 72d may be such that foreign matter does not enter the gap 74.
- the width Wrh of the connecting portion 72c is wider than the width Wg of the gap 74 of each friction material 58L, 58R, and the back plates 60L, 60R, respectively. It is thinner than the interval Wb (Wrh> Wg, Wrh ⁇ Wb). That is, there is a constant distance Wi between each of the back plates 60L and 60R and the connecting portion 72c.
- the contact portion 72b of the retainer 72 is curved toward the back plates 60L and 60R and is in contact with the protrusions 66L and 66R. Further, the connecting portion 72c is formed in a flat plate shape.
- turn-in side end portion 72d of the retainer 72 is engaged with the recess 76 formed in the central portion of the inner surface of one of the bridge portions 34B.
- the disc brake device 10 according to this embodiment can be summarized as follows.
- Each of the brake pads (48L, 48R) has a friction material (58L, 58R) having a contact surface in contact with the side surface of the brake disc (16), and one surface is a contact surface of the friction material (58L, 58R).
- a back plate (60L, 60R) attached to the back surface opposite to and the other surface pressed against the piston (46L, 46R)
- at least a portion of the retainer (72) is the friction.
- At least a part of the retainer and each back plate are provided at substantially the same height and at substantially the same position. This makes it difficult for foreign matter to enter between the pair of brake pads (gap between the friction materials).
- the one end portion (72d) of the retainer (72) in the circumferential direction (C) and the one end portion (62L, 62R) of the back plate (60L, 60R) in the circumferential direction (C) are the friction materials.
- (58L, 58R) may be provided at substantially the same height outside the brake disc (16) in the radial direction and at substantially the same position in the circumferential direction (C).
- one end of the retainer and one end of each back plate are substantially the same height outside the radial direction of the brake disc with respect to each friction material, and are substantially the same position in the circumferential direction of the brake disc. It is provided in. This makes it possible to prevent foreign matter from entering between the pair of brake pads.
- the width (Wre) of one end (72d) of the retainer (72) across the center line (CL) of the brake caliper (20) is the center of the gap (74) of each friction material (58L, 58R). It may be substantially the same as the width (Wg) straddling the line (CL).
- the width of one end of the retainer and the width of the gap between each friction material are substantially the same. This makes it possible to prevent foreign matter from entering the gaps between the friction materials while making the retainer as small and lightweight as possible.
- the retainer (72) is provided on the central portion side of the brake caliper (20) in the circumferential direction (C) with respect to one end portion (72d) of the retainer (72), and the back plates (60L, 60R) are provided. ), And the width (Wr) of the retainer (72) across the center line (CL) of the brake caliper (20) is from the contact portion (72b). It suffices to taper toward one end (72d) of the retainer (72).
- the width of the retainer is narrowed from the contact portion toward one end of the retainer. This makes it possible to reliably hold the pair of brake pads on the brake caliper while reducing the size and weight of the retainer. Further, the width of the contact portion is wider than the width of one end portion of the retainer. This makes it possible to reliably prevent foreign matter from entering the gaps between the friction materials.
- the retainer (72) further has a connecting portion (72c) that connects the contact portion (72b) and one end portion (72d) of the retainer (72), and the center line of the connecting portion (72c).
- the width (Wrh) straddling (CL) may be wider than the width (Wg) straddling the center line (CL) of the gap (74) of each friction material (58L, 58R).
- the width of the connecting portion is wider than the width of the gap between each friction material. This makes it possible to reliably prevent foreign matter from entering the gap.
- the width (Wrh) of the connecting portion (72c) straddling the center line (CL) may be smaller than the spacing (Wb) of the back plates (60L, 60R).
- the width of the connecting part is narrower than the distance between the back plates. This makes it possible to avoid interference between the retainer and each back plate.
- Each of the back plates (60L, 60R) is provided on the central portion side in the circumferential direction (C) with respect to one end portion (62L, 62R) of the back plate (60L, 60R), and the friction material (
- the brake disc (16) has a protrusion (66L, 66R) protruding outward in the radial direction with respect to 58L, 58R), and the contact portion (72b) is provided on each back plate (60L, 60R).
- the connecting portion (72c) may have a flat plate shape and has a shape that curves toward the protrusion and abuts on each of the protrusions (66L, 66R).
- the contact portion is curved toward each back plate and is in contact with the protrusion.
- the pair of brake pads can be held in the circumferential direction and the radial direction of the brake disc with respect to the brake caliper.
- the connecting portion has a flat plate shape, it is possible to make a mark or the like on the surface of the connecting portion to prevent erroneous assembly.
- the retainer (72) may be tapered stepwise from the contact portion (72b) toward one end (72d) of the retainer (72).
- the retainer gradually becomes thinner from the contact portion toward one end of the retainer. As a result, each of the above-mentioned effects can be easily obtained.
- One end (72d) of the retainer (72) may engage with a recess (76) provided in the brake caliper (20).
- one end of the retainer engages with the recess. Therefore, it is not necessary to widen the width of one end of the retainer in order to fix it to one end of the retainer. As a result, one end of the retainer can be made thinner to suppress the enlargement of the retainer. As a result, the retainer can be further reduced in size and weight.
- the inlet side of the brake caliper (20) in the rotation direction (Cr) of the brake disc (16) is the disc entry side (28), and the outlet side in the rotation direction (Cr) is the disc exit side (30). If this is the case, one end (72d) of the retainer (72) and one end (62L, 62R) of each of the back plates (60L, 60R) are connected to the disc entry side (28) or the disk ejection side (28). It may be provided on either side (30).
- one end of the retainer and one end of each back plate are provided on either the disk entry side or the disk exit side.
- each of the disc entry side (28) and the disc exit side (30) is the upper side of the disc brake device (10) and the other is the lower side of the disc brake device (10), the retainer.
- Each of one end (72d) of (72) and one end (62L, 62R) of each of the back plates (60L, 60R) may be provided under the disc brake device (10).
- one end of the retainer and one end of each back plate are provided under the disc brake device.
- the retainer (72) has a gap (74) formed between the friction materials (58L, 58R) on the radial outer side of the brake disc (16) with respect to the friction materials (58L, 58R).
- Each end portion (62L, 62R) of each of the back plates (60L, 60R) extends along the circumferential direction (C) so as to cover the friction material (58L, 58R) with respect to the brake disc (58L, 58R). It may protrude outward in the radial direction of 16).
- the retainer extends along the circumferential direction so as to cover the gap between the friction materials, and one end of each back plate protrudes radially outward of the friction material with respect to the friction material. This makes it possible to reliably prevent foreign matter from entering the gaps between the friction materials.
- the present invention is not limited to the above-described embodiment, and various configurations can be taken without departing from the gist of the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims (12)
- ブレーキディスク(16)と、前記ブレーキディスク(16)を跨ぐように設けられたブレーキキャリパ(20)と、前記ブレーキキャリパ(20)に収容されたピストン(46L、46R)と、前記ブレーキキャリパ(20)に収容され且つ前記ピストン(46L、46R)の作動によって前記ブレーキディスク(16)を挟圧する一対のブレーキパッド(48L、48R)と、前記ブレーキキャリパ(20)に設けられ且つ一対の前記ブレーキパッド(48L、48R)に当接することで一対の前記ブレーキパッド(48L、48R)を前記ブレーキキャリパ(20)に保持させるリテーナ(72)とを備えるディスクブレーキ装置(10)であって、
一対の前記ブレーキパッド(48L、48R)の各々は、前記ブレーキディスク(16)の側面に接触する接触面を有する摩擦材(58L、58R)と、一方の面が前記摩擦材(58L、58R)の接触面とは反対側の裏面に取り付けられ、他方の面が前記ピストン(46L、46R)に押圧される裏板(60L、60R)とを備え、
前記リテーナ(72)の少なくとも一部は、前記各摩擦材(58L、58R)に対して前記ブレーキディスク(16)の径方向外側で、前記各裏板(60L、60R)と略同じ高さ、且つ、前記ブレーキディスク(16)の周方向(C)における略同じ位置に設けられていることを特徴とするディスクブレーキ装置(10)。 - 請求項1記載のディスクブレーキ装置(10)において、
前記リテーナ(72)の前記周方向(C)における一端部(72d)と、前記裏板(60L、60R)の前記周方向(C)における一端部(62L、62R)とは、前記各摩擦材(58L、58R)に対して前記ブレーキディスク(16)の径方向外側で、略同じ高さ、且つ、前記周方向(C)における略同じ位置に設けられていることを特徴とするディスクブレーキ装置(10)。 - 請求項2記載のディスクブレーキ装置(10)において、
前記リテーナ(72)の一端部(72d)の前記ブレーキキャリパ(20)の中心線(CL)を跨いだ幅(Wre)は、前記各摩擦材(58L、58R)の隙間(74)の前記中心線(CL)を跨いだ幅(Wg)と略同じであることを特徴とするディスクブレーキ装置(10)。 - 請求項2又は3記載のディスクブレーキ装置(10)において、
前記リテーナ(72)は、前記リテーナ(72)の一端部(72d)に対して前記周方向(C)における前記ブレーキキャリパ(20)の中央部側に設けられ、前記各裏板(60L、60R)に当接する当接部(72b)を有し、
前記リテーナ(72)の前記ブレーキキャリパ(20)の中心線(CL)を跨いだ幅(Wr)は、前記当接部(72b)から前記リテーナ(72)の一端部(72d)に向かって細くなることを特徴とするディスクブレーキ装置(10)。 - 請求項4記載のディスクブレーキ装置(10)において、
前記リテーナ(72)は、前記当接部(72b)と前記リテーナ(72)の一端部(72d)とを連結する連結部(72c)をさらに有し、
前記連結部(72c)の前記中心線(CL)を跨いだ幅(Wrh)は、前記各摩擦材(58L、58R)の隙間(74)の前記中心線(CL)を跨いだ幅(Wg)より広いことを特徴とするディスクブレーキ装置(10)。 - 請求項5記載のディスクブレーキ装置(10)において、
前記連結部(72c)の前記中心線(CL)を跨いだ幅(Wrh)は、前記各裏板(60L、60R)の間隔(Wb)より細いことを特徴とするディスクブレーキ装置(10)。 - 請求項5又は6記載のディスクブレーキ装置(10)において、
前記各裏板(60L、60R)の各々は、前記裏板(60L、60R)の一端部(62L、62R)に対して前記周方向(C)における中央部側に設けられ、前記摩擦材(58L、58R)に対して前記ブレーキディスク(16)の径方向外側に突出する突起部(66L、66R)を有し、
前記当接部(72b)は、前記各裏板(60L、60R)に向かって湾曲して前記各突起部(66L、66R)に当接する形状を有し、
前記連結部(72c)は、平板状であることを特徴とするディスクブレーキ装置(10)。 - 請求項4~7のいずれか1項に記載のディスクブレーキ装置(10)において、
前記リテーナ(72)は、前記当接部(72b)から前記リテーナ(72)の一端部(72d)に向かって段階的に細くなることを特徴とするディスクブレーキ装置(10)。 - 請求項2~8のいずれか1項に記載のディスクブレーキ装置(10)において、
前記リテーナ(72)の一端部(72d)は、前記ブレーキキャリパ(20)に設けられた凹部(76)に係合することを特徴とするディスクブレーキ装置(10)。 - 請求項2~9のいずれか1項に記載のディスクブレーキ装置(10)において、
前記ブレーキキャリパ(20)の前記ブレーキディスク(16)の回転方向(Cr)における入口側をディスク回入側(28)とし、前記回転方向(Cr)における出口側をディスク回出側(30)とした場合、前記リテーナ(72)の一端部(72d)と前記各裏板(60L、60R)の一端部(62L、62R)の各々とは、前記ディスク回入側(28)又は前記ディスク回出側(30)のいずれかに設けられることを特徴とするディスクブレーキ装置(10)。 - 請求項10記載のディスクブレーキ装置(10)において、
前記ディスク回入側(28)及び前記ディスク回出側(30)のうち、一方が前記ディスクブレーキ装置(10)の上側、他方が前記ディスクブレーキ装置(10)の下側である場合、前記リテーナ(72)の一端部(72d)と前記各裏板(60L、60R)の一端部(62L、62R)の各々とは、前記ディスクブレーキ装置(10)の下側に設けられることを特徴とするディスクブレーキ装置(10)。 - 請求項2~11のいずれか1項に記載のディスクブレーキ装置(10)において、
前記リテーナ(72)は、前記各摩擦材(58L、58R)に対して前記ブレーキディスク(16)の径方向外側で、前記各摩擦材(58L、58R)間に形成される隙間(74)を覆うように前記周方向(C)に沿って延び、
前記各裏板(60L、60R)の一端部(62L、62R)の各々は、前記摩擦材(58L、58R)に対して前記ブレーキディスク(16)の径方向外側に突出していることを特徴とするディスクブレーキ装置(10)。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022545510A JP7653444B2 (ja) | 2020-08-25 | 2021-07-09 | ディスクブレーキ装置 |
| CN202180051614.0A CN115956169B (zh) | 2020-08-25 | 2021-07-09 | 盘式制动装置 |
| DE112021004458.3T DE112021004458T5 (de) | 2020-08-25 | 2021-07-09 | Scheibenbremsvorrichtung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-141378 | 2020-08-25 | ||
| JP2020141378 | 2020-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022044568A1 true WO2022044568A1 (ja) | 2022-03-03 |
Family
ID=80353171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2021/025961 Ceased WO2022044568A1 (ja) | 2020-08-25 | 2021-07-09 | ディスクブレーキ装置 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7653444B2 (ja) |
| CN (1) | CN115956169B (ja) |
| DE (1) | DE112021004458T5 (ja) |
| WO (1) | WO2022044568A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007094017A1 (en) * | 2006-02-17 | 2007-08-23 | Freni Brembo S.P.A. | Spring for holding pads in a disc brake caliper |
| JP2009041618A (ja) * | 2007-08-07 | 2009-02-26 | Akebono Brake Ind Co Ltd | ディスクブレーキ装置用パッドクリップおよびディスクブレーキ装置 |
| JP2016194325A (ja) * | 2015-03-31 | 2016-11-17 | 株式会社アドヴィックス | ディスクブレーキ装置 |
| WO2019049539A1 (ja) * | 2017-09-07 | 2019-03-14 | 日信工業株式会社 | 車両用ディスクブレーキ |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4021493A1 (de) * | 1990-07-05 | 1992-01-09 | Otto Kurt Stahl | Scheibenbremse |
| JP3198397B2 (ja) * | 1994-07-06 | 2001-08-13 | 日信工業株式会社 | 車両用ディスクブレーキ |
| WO2013129381A1 (ja) * | 2012-02-29 | 2013-09-06 | 日立オートモティブシステムズ株式会社 | ディスクブレーキ |
| JP5894821B2 (ja) * | 2012-03-15 | 2016-03-30 | 日立オートモティブシステムズ株式会社 | ディスクブレーキ |
| JP6253190B2 (ja) * | 2013-11-29 | 2017-12-27 | 日立オートモティブシステムズ株式会社 | ディスクブレーキ |
| JP6433510B2 (ja) * | 2014-12-25 | 2018-12-05 | 日信工業株式会社 | 車両用ディスクブレーキ |
| DE102016104969A1 (de) * | 2015-10-09 | 2017-04-13 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Scheibenbremse für ein Nutzfahrzeug |
| JP2020056486A (ja) * | 2018-10-04 | 2020-04-09 | トヨタ自動車株式会社 | ディスクブレーキ |
-
2021
- 2021-07-09 CN CN202180051614.0A patent/CN115956169B/zh active Active
- 2021-07-09 WO PCT/JP2021/025961 patent/WO2022044568A1/ja not_active Ceased
- 2021-07-09 JP JP2022545510A patent/JP7653444B2/ja active Active
- 2021-07-09 DE DE112021004458.3T patent/DE112021004458T5/de active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007094017A1 (en) * | 2006-02-17 | 2007-08-23 | Freni Brembo S.P.A. | Spring for holding pads in a disc brake caliper |
| JP2009041618A (ja) * | 2007-08-07 | 2009-02-26 | Akebono Brake Ind Co Ltd | ディスクブレーキ装置用パッドクリップおよびディスクブレーキ装置 |
| JP2016194325A (ja) * | 2015-03-31 | 2016-11-17 | 株式会社アドヴィックス | ディスクブレーキ装置 |
| WO2019049539A1 (ja) * | 2017-09-07 | 2019-03-14 | 日信工業株式会社 | 車両用ディスクブレーキ |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115956169B (zh) | 2025-10-03 |
| JPWO2022044568A1 (ja) | 2022-03-03 |
| CN115956169A (zh) | 2023-04-11 |
| DE112021004458T5 (de) | 2023-06-07 |
| JP7653444B2 (ja) | 2025-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9889902B2 (en) | Vehicle | |
| JP2022072810A (ja) | クラッチ装置およびそれを備える鞍乗型車両 | |
| TW202019750A (zh) | 用於兩輪及三輪車輛車把之止動件及該止動件之製造方法 | |
| US8991543B2 (en) | Straddle type vehicle | |
| JP2020193714A (ja) | 張力がかかるブレーキパッド | |
| WO2021161642A1 (ja) | 車両用ディスクブレーキ | |
| JP2018141480A (ja) | モータサイクル | |
| CA2517814C (en) | Brake caliper structure of straddle seat off-road vehicle | |
| JP7653444B2 (ja) | ディスクブレーキ装置 | |
| JP7768884B2 (ja) | ディスクブレーキ装置 | |
| KR0141554B1 (ko) | 자동 2륜차용 제동장치 | |
| US7849980B2 (en) | Disk braking device and motorcycle provided with the disk braking device | |
| JP7030102B2 (ja) | ディスクブレーキ構造 | |
| JP6198299B2 (ja) | ディスクブレーキ | |
| JP4845042B2 (ja) | ドラムブレーキ並びにブレーキライニング、及び鞍乗型車両 | |
| US4018310A (en) | Disc brake | |
| US7275624B2 (en) | Disk brake unit for motorcycle | |
| US4019611A (en) | Disc brake | |
| JP5845543B2 (ja) | 自動二輪車 | |
| JP2005240885A (ja) | 車両のディスクブレーキにおけるパッド残量確認構造 | |
| WO2021106980A1 (ja) | ディスクブレーキ | |
| JP7034281B2 (ja) | ディスクブレーキおよびキャリパ | |
| JP4293708B2 (ja) | 車両用ディスクブレーキの取付け構造 | |
| JP2008281102A (ja) | 車両制動装置 | |
| JP2018202900A (ja) | 鞍乗型車両 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21860998 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2022545510 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202317018805 Country of ref document: IN |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 21860998 Country of ref document: EP Kind code of ref document: A1 |
|
| WWG | Wipo information: grant in national office |
Ref document number: 202180051614.0 Country of ref document: CN |