JP2012229788A - Brake apparatus, friction couple for brake apparatus, and brake pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake apparatus, a friction couple for the brake apparatus, and a brake pad which can be optimized in friction performance.SOLUTION: The brake apparatus includes a first member 4 having a plurality of friction materials 41, a second member 5 which can be displaced relatively with the first member 4 upon contact with the plurality of friction materials 41, and a pressing mechanism 3 for pressing the first member 4 and the second member 5. The first member 4 has a pressing transmission mechanism 44 in which a plurality of pressing members 45 is respectively inserted into a plurality of insertion holes 41b provided respectively on a back surface side of friction surfaces 41a of the plurality of friction materials 41, and when the pressing mechanism 3 presses the first member 4 and the second member 5, the pressing members 45 press bottom parts 41c of the insertion holes 41b toward the second member 5 so as to press the friction material 41 to the second member 5. Accordingly, the brake apparatus, the friction couple for the brake apparatus, and the brake pad can be optimized in friction performance.

Description

  The present invention relates to a brake device, a friction pair for a brake device, and a brake pad.

  As a conventional brake device such as a disc brake, for example, in Patent Document 1, a torque transmission ring connected to the center of each back plate of a friction material divided into a plurality is fitted into a guide hole of a guide plate, There is disclosed a disc brake friction material assembly in which a leaf spring placed over a hole holds a torque transmission ring between a guide plate and a disc brake. The disc brake friction material assembly further includes a plurality of back surface abutting portions in which two types of link plates abut on a plurality of back plates and a single plate abutting portion in contact with the torque receiving plate. The pressure is transmitted between each back plate and the torque receiving plate.

JP 2009-185946 A

  By the way, the disc brake friction material assembly described in Patent Document 1 as described above has room for further improvement in terms of friction performance, for example.

  This invention is made | formed in view of said situation, Comprising: It aims at providing the brake device which can optimize friction performance, the friction pair for brake devices, and a brake pad.

  In order to achieve the above object, a brake device according to the present invention includes a first member having a plurality of friction materials, and a second member that comes into contact with the plurality of friction materials and is relatively displaceable from the first member. And a pressing mechanism that presses the first member and the second member, and the first member has a plurality of pressing members in a plurality of insertion holes respectively provided on a back surface side of the friction surface of the plurality of friction materials. Are inserted, and when the pressing mechanism presses the first member and the second member, the pressing member presses the bottom of the insertion hole toward the second member, and the friction material is It has a pressure transmission mechanism that presses against the second member.

  In the brake device, the pressing transmission mechanism may be in point contact between the pressing member and the bottom of the insertion hole.

  In the brake device, the first member includes a guide member that guides the plurality of friction materials in a pressing direction by the pressing mechanism and restricts movement in a direction intersecting the pressing direction. Can do.

  In the brake device, the pressing transmission mechanism may transmit the pressing force from the pressing mechanism in a distributed manner to each of the friction materials.

  In the brake device, the pressing transmission mechanism includes a swinging member interposed between the supporting member to which the pressing force from the pressing mechanism acts and the plurality of pressing members, and the pressing mechanism from the pressing mechanism. The force can be leveled and transmitted from the support member to the pressing member via the swing member.

  In the brake device, the plurality of pressing members are elastic bodies, and may be interposed between the support member on which the pressing force from the pressing mechanism acts and the plurality of friction materials.

  Moreover, in the said brake device, the contact surface of the said friction material and the said 2nd member shall each be comprised with a hard material.

  In order to achieve the above object, a friction pair for a brake device according to the present invention includes a first member having a plurality of friction materials and a first member that is in contact with the plurality of friction materials and is relatively displaceable with the first member. A plurality of pressing members inserted into a plurality of insertion holes respectively provided on the back side of the friction surface of the plurality of friction materials, and the first member and the second member. When the member is pressed, the pressing member has a pressure transmission mechanism that presses the bottom of the insertion hole toward the second member and presses the friction material against the second member. .

  In order to achieve the above object, a brake pad according to the present invention includes a plurality of friction materials in contact with a disk rotor that rotates together with a wheel, and a plurality of insertion holes provided on the back side of the friction surface of the plurality of friction materials. When the plurality of pressing members are respectively inserted and pressed against the disk rotor, the pressing members respectively press the bottom of the insertion hole toward the disk rotor and press the friction material against the disk rotor. And a pressure transmission mechanism.

  The brake device, the brake device friction pair, and the brake pad according to the present invention have an effect that the friction performance can be optimized by stabilizing the area of the friction portion.

FIG. 1 is a partial cross-sectional view illustrating a schematic configuration of a friction pair for a brake device according to a first embodiment. FIG. 2 is a schematic diagram illustrating a schematic configuration of the brake device according to the first embodiment. FIG. 3 is a perspective view of the friction material of the brake device according to the first embodiment. FIG. 4 is a partial perspective view of the guide member of the brake device according to the first embodiment. FIG. 5 is a schematic diagram for explaining the operation of the pressure transmission mechanism of the brake device according to the first embodiment. FIG. 6 is a schematic diagram illustrating the clearance and shape of the friction material of the brake device according to the first embodiment. FIG. 7 is a schematic partial cross-sectional view illustrating a friction braking surface of the brake device according to the first embodiment. FIG. 8 is a schematic partial cross-sectional view illustrating pressing states of a plurality of friction materials of the brake device according to the first embodiment. FIG. 9 is a schematic partial cross-sectional view illustrating the force points of the friction material of the brake device according to the first embodiment. FIG. 10 is a partial cross-sectional view illustrating a schematic configuration of a brake device friction pair according to the second embodiment. FIG. 11 is a schematic partial cross-sectional view illustrating pressing states of a plurality of friction materials of the brake device according to the second embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

[Embodiment 1]
1 is a partial cross-sectional view showing a schematic configuration of a brake device friction pair according to the first embodiment, FIG. 2 is a schematic diagram showing a schematic configuration of the brake device according to the first embodiment, and FIG. FIG. 4 is a partial perspective view of a guide member of the brake device according to the first embodiment, and FIG. 5 is a schematic diagram for explaining the operation of the pressure transmission mechanism of the brake device according to the first embodiment. FIG. 6 is a schematic diagram illustrating the clearance and shape of the friction material of the brake device according to the first embodiment. FIG. 7 is a schematic partial cross-sectional view illustrating the friction braking surface of the brake device according to the first embodiment. FIG. 8 is a schematic partial cross-sectional view illustrating the pressing state of the plurality of friction materials of the brake device according to the first embodiment, and FIG. 9 is a schematic diagram illustrating the force points of the friction materials of the brake device according to the first embodiment. Part It is a cross-sectional view.

  As shown in FIGS. 1 and 2, the brake device 1 of the present embodiment is typically mounted on a vehicle and applies braking force to a wheel that is rotatably supported on the vehicle body of the vehicle. A brake device friction pair 2 and an actuator 3 as a pressing mechanism are provided.

  The brake device friction pair 2 is for generating a predetermined friction force (friction resistance force) between the friction elements when a braking force is applied to the wheel. The brake device friction pair 2 is a so-called hard friction pair using a hard material, and can obtain relatively high wear characteristics. On the other hand, in the brake device friction pair 2 which is such a hard friction pair, the contact surfaces which become friction braking surfaces are not familiar with each other, and the contact area becomes unstable, and the friction performance and braking performance may be deteriorated.

  Therefore, the brake device 1 according to the present embodiment stably presses the friction material 41 divided into a plurality of portions through the press transmission mechanism 44 so that the brake device friction pair 2 is stably in surface contact with the wide contact. The area can be secured, the area of the friction part can be stabilized, and the friction performance can be optimized.

  The brake device friction pair 2 includes a brake pad 4 as a first member and a disk rotor (brake rotor) 5 as a second member. A pair of brake pads 4 are provided on the vehicle body side so as not to rotate together with the wheels. The disk rotor 5 is provided on the wheel side so as to be integrally rotatable with the wheel. As a result, the brake pad 4 and the disk rotor 5 are configured to be relatively displaceable, that is, have a relationship capable of relative rotation in the rotational direction of the disk rotor 5. The pair of brake pads 4 are disposed on both sides of the disk rotor 5 and face the contact surfaces 5 a on both sides of the disk rotor 5. The pair of brake pads 4 sandwich both sides of the disk rotor 5 according to the operation of the actuator 3.

  The actuator 3 presses the brake pad 4 and the disc rotor 5 when a braking force is applied to the wheel. As shown in FIG. 2, the actuator 3 includes a caliper 6 and a piston 7. The caliper 6 has a U-shape straddling the disc rotor 5 and is supported by a mounting bracket (not shown) fixed to the vehicle body side. The caliper 6 supports the pair of brake pads 4 so as to be able to approach and separate from the contact surface 5 a of the disk rotor 5. The caliper 6 includes a cylinder portion 9 provided with a cylinder mechanism 8 that allows the piston 7 to move back and forth, a reaction portion 10 that is disposed on the opposite side of the cylinder portion 9 with the disc rotor 5 interposed therebetween, and the cylinder portion 9 and the reaction The connecting part 11 that connects the part 10 is included. The pair of brake pads 4 includes an inner pad disposed on the cylinder portion 9 side of the caliper 6 and an outer pad disposed on the reaction portion 10 side. In the cylinder mechanism 8, a piston 7 is movably supported by a cylinder portion 9, and a hydraulic pressure chamber 12 is defined by the cylinder portion 9, the piston 7, a seal, and the like. The tip of the piston 7 faces the brake pad (inner pad) 4.

  Therefore, for example, when the hydraulic fluid is supplied to the hydraulic chamber 12 and pressurized according to the brake pedal depression operation by the driver, the brake device 1 moves the piston 7 in the direction of arrow A (the brake pad (inner pad) 4 The front end of the piston 7 presses one brake pad 4, and the one brake pad 4 can be brought close to one contact surface 5 a of the disk rotor 5. At this time, the caliper 6 moves forward in the direction opposite to that of the piston 7, that is, in the direction indicated by the arrow B (the direction in which the brake pad (outer pad) 4 approaches the disc rotor 5) due to the moving reaction force of the piston 7 moving forward. The other brake pad 4 can be brought close to the other contact surface 5 a of the disk rotor 5. In the brake device 1, when each brake pad 4 is abutted against and pressed against each contact surface 5 a of the disk rotor 5 to sandwich the disk rotor 5, a predetermined rotational resistance force acts on the disk rotor 5 that rotates together with the wheels. In addition, a braking force can be applied to the disk rotor 5 and the wheels that rotate integrally therewith. In the brake device 1, when the hydraulic chamber 12 is depressurized, the piston 7 and the caliper 6 are returned to predetermined positions, and each brake pad 4 is separated from the disc rotor 5.

  And as above-mentioned, the brake device 1 of this embodiment is the brake pad 4 which comprises the friction pair 2 for brake devices is comprised including the some friction material 41 and the press transmission mechanism 44, and is braked. The pad 4 and the disk rotor 5 are stably brought into surface contact, ensuring a wide contact area, stabilizing the area of the friction part, optimizing the friction performance, for example, improving the wear performance, friction performance, braking performance We are trying to balance improvement.

  Specifically, as shown in FIG. 1, the brake pad 4 includes a friction material 41 divided into a plurality of parts, a back metal 42 as a support member, a guide member 43, and a press transmission mechanism 44.

  In FIG. 1, the horizontal direction in the figure is the direction of relative displacement between the brake pad 4 and the disk rotor 5, that is, the rotational direction of the disk rotor 5, more specifically, the sliding direction of the brake pad 4. Further, the vertical direction in the figure is the pressing direction of the brake pad 4 and the disk rotor 5 by the actuator 3. The brake pad 4 is described as having a common configuration unless the inner pad and the outer pad need to be distinguished from each other because the inner pad and the outer pad have substantially the same configuration.

  The plurality of friction materials 41 are provided to face the contact surface 5a of the disk-shaped disk rotor 5 that slides on the friction material 41 and generates a frictional force. In the friction material 41, a surface facing the contact surface 5a forms a contact surface 41a as a friction surface. When the brake pad 4 is pressed against the brake pad 4 and the disk rotor 5 by the actuator 3, the friction braking is performed such that each contact surface 41 a of each friction material 41 slides in contact with the contact surface 5 a of the disk rotor 5. This contact surface 41a generates a braking force.

  As shown in FIGS. 1 and 3, the friction material 41 of the present embodiment is formed in a columnar shape, and an insertion hole 41b is provided on the back side of the contact surface 41a. In other words, the friction material 41 is formed in a cylindrical shape with the contact surface 41a side closed, and the hollow portion forms the insertion hole 41b. The friction material 41 is closed at one end in the direction along the cylindrical central axis to form a contact surface 41a, and the other end is opened to form a hollow insertion hole 41b.

  Here, the contact surfaces 41a and 5a between each friction material 41 and the disk rotor 5 are each made of a hard material. The contact surfaces 41a and 5a are typically made of a material having relatively high heat resistance, a predetermined strength or higher, and relatively high hardness, such as alumina or silicon nitride, as a hard material.

  The back metal 42 is composed of a plate-like member, forms the base end portion of the brake pad 4, and supports a plurality of friction materials 41 via a guide member 43, a pressure transmission mechanism 44, and the like which will be described later. The backing metal 42 is transmitted by a pressing force from the actuator 3 to a press transmission mechanism 44 described later. The brake pad 4 is provided on the caliper 6 (see FIG. 2) so that the back metal 42 contacts the piston 7 (see FIG. 2) and the reaction unit 10 (see FIG. 2). The back metal 42 supports the plurality of friction materials 41 via a guide member 43, a press transmission mechanism 44, and the like which will be described later. The back metal 42 is typically made of a material having relatively high heat resistance and a strength higher than a predetermined level, such as an iron plate or stainless steel.

  The guide member 43 is for positioning each friction material 41 at a predetermined position. As shown in FIGS. 1 and 4, the guide member 43 is formed in a plate shape and has a plurality of accommodation holes 43 a for accommodating the friction materials 41. Each accommodation hole 43a penetrates the main body of the guide member 43 in the pressing direction by the actuator 3 (hereinafter sometimes simply referred to as “pressing direction”). Here, each accommodation hole 43 a is formed in a cylindrical shape corresponding to the shape of the friction material 41. The plurality of accommodation holes 43a are formed at substantially equal intervals with the adjacent accommodation holes 43a.

  The guide member 43 accommodates one friction material 41 in each accommodation hole 43a, guides the plurality of friction materials 41 in the pressing direction by the actuator 3, and a direction intersecting the pressing direction, that is, the pressing direction. It functions as a restraint that restricts the movement of the friction material 41 to other than (typically the pad surface direction). Each friction material 41 is accommodated in each accommodation hole 43a of the guide member 43 such that a columnar (cylindrical) central axis is substantially parallel to the pressing direction.

  The guide member 43 accommodates each friction material 41 in each accommodation hole 43a, and the peripheral portion 43b is attached to the back metal 42 with a later-described press transmission mechanism 44 sandwiched between the back metal 42 in the pressing direction. Fixed. In this state, each friction material 41 has its contact surface 41a exposed to the opposite side of the back metal 42 through each housing hole 43a to face the contact surface 5a of the disk rotor 5, and is housed by a retaining means (not shown). Omission from the hole 43a is prevented.

  As described above, the press transmission mechanism 44 is provided between the back metal 42 and the plurality of friction materials 41 in the pressing direction. The pressure transmission mechanism 44 includes a plurality of pressing members 45 corresponding to the plurality of friction materials 41. Each pressing member 45 is formed in a rod shape, and is inserted into each insertion hole 41b of each friction material 41 one by one. The tip of the pressing member 45 comes into contact with the bottom 41c of the insertion hole 41b.

  When the actuator 3 presses the brake pad 4 and the disk rotor 5, the pressing transmission mechanism 44 presses the bottom 41 c of the insertion hole 41 b toward the disk rotor 5 when the pressing member 45 presses the brake pad 4 and the disk rotor 5. 41 a is pressed against the contact surface 5 a of the disk rotor 5.

  In the pressure transmission mechanism 44 of this embodiment, the pressure member 45 and the bottom 41c of the insertion hole 41b are in point contact. Here, the pressing member 45 is provided with a protrusion 45a at the tip, and the protrusion 45a makes point contact with the bottom 41c. That is, in the pressing member 45, the protrusion 45a becomes a point contact portion with the bottom portion 41c.

  Here, the pressure transmission mechanism 44 disperses and transmits the pressing force from the actuator 3 to each friction material 41 in the same size. The pressure transmission mechanism 44 of this embodiment presses each friction material 41 with a substantially equivalent load by a so-called equalizer mechanism. That is, the press transmission mechanism 44 distributes and leveles the total force (total pressure) of the pressing force applied to the plurality of friction materials 41 via the back metal 42 and transmits it to each friction material 41.

  Specifically, the pressure transmission mechanism 44 includes a first swing member 46 and second swing members 47 and 48 as swing members. The first rocking member 46 and the second rocking members 47 and 48 are each formed of a plate-like member, and are interposed between the back metal 42 and the plurality of pressing members 45, and are pressed against the pressing member 45 from the back metal 42. It is a member which transmits. The first rocking member 46 and the second rocking members 47 and 48 have a curved surface on the back metal 42 side and a flat surface on the pressing member 45 side in the pressing direction, respectively. In FIG. 1, as an example, the pressure transmission mechanism 44 is described as including a first rocking member 46 and second rocking members 47 and 48 as rocking members. More rocking members may be provided according to the number of 45 or the like.

  In the pressing transmission mechanism 44, the first swinging member 46 is disposed on the back metal 42 side and the second swinging members 47 and 48 are disposed on the plurality of pressing member 45 sides with respect to the pressing direction. The second rocking members 47 and 48 are each integrally connected with a plurality of pressing members 45 on a flat surface. Here, each of the second swing members 47 and 48 is provided with two pressing members 45 on a flat surface. The first rocking member 46 has a flat surface in contact with the curved surfaces of the second rocking members 47 and 48 and a curved surface in contact with the back metal 42. The first swing member 46 is provided so as to be swingable with the contact point as a fulcrum while being in contact with the back metal 42 and the second swing members 47, 48. While being in contact with the bottom 41c of the friction material 41, it is provided so as to be swingable with the contact point as a fulcrum.

  Therefore, the pressure transmission mechanism 44 applies the pressing force from the actuator 3 from the back metal 42 to the first swing member 46 and the second swing member 47 or the first swing member 46 and the second swing member 48. It can level and transmit to each pressing member 45 through in order.

  For example, as illustrated in FIG. 5, the pressure transmission mechanism 44 applies the pressing force input from the actuator 3 to the back metal 42 via the contact point between the curved surface of the first rocking member 46 and the back metal 42. It is received on the curved surface side of the moving member 46. Then, the pressure transmission mechanism 44 receives the load received by the first swing member 46, the contact point between the flat surface of the first swing member 46 and the curved surface of the second swing member 47, and the first swing member 46. Through the contact point between the flat surface of the second rocking member 48 and the curved surface of the second rocking member 48, the curved surface side of the second rocking member 47 and the curved surface side of the second rocking member 48 provided so as to be rockable. Receive evenly. That is, the second swing member 47 and the second swing member 48 each receive a load that is 50% of the total pressing load. Then, the pressure transmission mechanism 44 transmits the load received by the second swing member 47 to the bottom portions 41 c of the two friction members 41 through the two press members 45 almost evenly and is received by the second swing member 48. The transmitted load is transmitted to the bottom portions 41c of the two friction members 41 through the two pressing members 45 almost evenly. That is, the second swing member 47 and the second swing member 48 each transmit a load of 25% of the total pressing load to each of the four pressing members 45. As a result, the press transmission mechanism 44 can transmit the pressing force from the actuator 3 in a distributed manner to each friction material 41 in an equal size. In other words, the pressure transmission mechanism 44 can distribute the load to each friction material 41 in a substantially uniform manner so that the contact surface 41 a of each friction material 41 can contact the contact surface 5 a of the disk rotor 5.

  Here, as shown in FIG. 6, the brake pad 4 is configured such that the moment length h1 of the friction material 41 is as small as possible, and the height h2 of the friction material 41 is as large as possible. It is preferable that a clearance, a shape, etc. are set. As a result, the brake pad 4 receives the friction material 41 when a pressing force (load) W acts on the friction material 41 and the contact surface 41 a contacts the contact surface 5 a of the disk rotor 5 to generate the friction force F. It is suppressed that the friction material 41 becomes a point contact by the rotational force which acts on. In FIG. 6, the friction material 41 represented by a solid line schematically represents the state before rotation, and the friction material 41 represented by a dotted line schematically represents the state after rotation.

  The moment length h1 of the friction material 41 corresponds to the length along the pressing direction from the point A to the restraint point B in FIG. The brake pad 4 can relatively reduce the generated rotational force M (= F × h1) in the (left) rotation direction around the point A in FIG. 6 by relatively reducing the moment length h1. it can. The point A here corresponds to a point that becomes the center of rotation when the friction material 41 and the disk rotor 5 come into contact with each other. Further, the restraint point B corresponds to a point where the outer surface of the friction material 41 is in contact with the inner surface of the accommodation hole 43a on the side opposite to the point A and the rotation is restrained. The brake pad 4 can relatively reduce the moment length h <b> 1 of the friction material 41 by reducing the clearance (gap) between the inner surface of the accommodation hole 43 a of the guide member 43 and the outer surface of the friction material 41.

Further, the height h2 of the friction material 41 corresponds to a length along the pressing direction of the friction material 41 as shown in FIG. The brake pad 4 can reduce the rotational displacement θ in FIG. 6 by relatively increasing the height h2 and restricting the movement of each friction material 41 in a direction other than the pressing direction by the guide member 43. . The rotational displacement θ [degree] here can be expressed as sin ⁻¹ (δ / h2). δ corresponds to a clearance (gap) on the restraint point C side where the outer surface of the friction material 41 contacts the inner surface of the accommodation hole 43a on the point A side and the rotation is restrained. The brake pad 4 can have a relatively large height h2 of the friction material 41 by increasing the thickness of the friction material 41 from the contact surface 41a.

  In the brake device 1 configured as described above, when the brake pad 4 is pressed against the rotating disk rotor 5 by the actuator 3, the contact surface 41a of each friction material 41 and the contact surface 5a of the disk rotor 5 come into contact with each other. The contact surfaces 41a and the contact surfaces 5a slide in accordance with the rotation of the disk rotor 5. The brake device 1 is configured so that the relative displacement between the brake pad 4 and the disk rotor 5, that is, the disk rotor, is generated by the frictional force (friction resistance) generated between the contact surfaces 41 a and the contact surfaces 5 a of the friction materials 41. A braking force that brakes the rotation of 5 can be generated. The brake device 1 is caused by a frictional force generated between each contact surface 41a and the contact surface 5a in association with the relative displacement between the brake pad 4 and the disk rotor 5 in a state where the brake pad 4 and the disk rotor 5 are pressed. The relative displacement can be braked. As a result, the brake device 1 can apply a predetermined braking force to the disk rotor 5 and thus to the wheels.

  In the brake device 1 of the present embodiment, when the actuator 3 presses the brake pad 4 and the disk rotor 5, the pressing members 45 of the pressing transmission mechanism 44 respectively push the bottom 41 c of the insertion hole 41 b to the disk rotor 5. The contact surface 41 a of the friction material 41 is pressed against the contact surface 5 a of the disc rotor 5. Thereby, this brake device 1 can position the front-end | tip part of the press member 45 reliably in the insertion hole 41b, and presses in the immediate vicinity of the contact part of the contact surface 41a and the contact surface 5a in the bottom part 41c. The point of application of the pressing force from the member 45 can be positioned, that is, the point of application of the pressing force can be brought close to the friction braking surface between the contact surface 41a and the contact surface 5a. As a result, the brake device 1 can stably contact the contact surface 41a and the contact surface 5a to stabilize the area of the friction part, optimize the friction performance, for example, improve the wear performance, Performance and braking performance can be improved at the same time.

  Moreover, since the contact surfaces 41a and 5a of each friction material 41 and the disc rotor 5 are each made of a hard material, the brake device 1 can obtain relatively high wear characteristics. For example, the contact surface 41a The melting point of 5a can be made relatively high, so that the allowable range for heat of the brake device friction pair 2 can be expanded. On the other hand, in this case, each of the friction materials 41 and the disk rotor 5 has contact surfaces 41a and 5a which are hard materials, so that the contact surfaces which become friction braking surfaces as illustrated in FIGS. 41a and the contact surface 5a are not adapted to each other, and the contact area may become unstable and may be reduced.

  On the other hand, the brake device 1 is configured such that the brake pad 4 is divided into a plurality of friction materials 41 as a whole, and the bottom surface 41c of each insertion hole 41b is supported by the pressing member 45 corresponding to the contact surface 5a of the disc rotor 5. As shown in FIG. 8, the contact surface 41a of each friction material 41 can be independently pressed to the contact surface 5a. As a result, the brake device 1 can easily follow the contact surface 41a in conformity with the fine irregularities of the contact surface 5a, and therefore the contact surfaces 41a and 5a are made of hard materials. Even if it exists, the contact area of the contact surface 41a and the contact surface 5a can be enlarged relatively, for example, a friction performance and braking performance can further be improved.

  Further, in the brake device 1, each pressing member 45 of the pressure transmission mechanism 44 is in point contact with the bottom 41 c of the insertion hole 41 b at the protrusion 45 a, so that the bottom 41 c of each friction material 41 is illustrated as illustrated in FIG. 9. The position of the application point of the pressing force from the pressing member 45 can be stabilized at one point of the protrusion 45a, and for example, it can be suppressed that the application point shifts from the center of the bottom 41c. And since the brake device 1 can stabilize the position of the force point of the pressing force, as a result, the friction braking surface between the contact surface 41a and the contact surface 5a can be stabilized, and the friction performance, The braking performance can be further improved.

  Further, in the brake device 1, the pressing force transmission mechanism 44 distributes the pressing force from the actuator 3 to each friction material 41 in a substantially equal size and transmits the friction material 41 in a uniform manner. It can be pressed, and it can be suppressed that the pressing load is biased to a specific location in the pad surface of the brake pad 4 (in the surface facing the contact surface 5a) and the uneven load is generated. The brake device 1 can prevent a local increase in contact surface pressure, and can further improve, for example, friction performance and braking performance.

  In addition, the brake device 1 reduces the moment length h1 of the friction material 41 and increases the height h2 of the friction material 41, so that a pressing force (load) W acts on the friction material 41 and the contact surface 41a. Since the generated rotational force M and the rotational displacement θ generated when the frictional force F is generated can be suppressed, the frictional material 41 is prevented from being point-contacted by the rotational force acting on the frictional material 41. The friction area between the contact surface 41a and the contact surface 5a can be further stabilized. Furthermore, the brake device 1 regulates the falling of the friction material 41 because the guide member 43 guides the plurality of friction materials 41 in the forward pressing direction and restricts the movement in the direction intersecting the pressing direction. , The contact area can be further stabilized.

  According to the brake device 1 according to the embodiment described above, the brake pad 4 having the plurality of friction materials 41, the disk rotor 5 that is in contact with the plurality of friction materials 41 and is relatively displaceable with the brake pad 4, The brake pad 4 and the actuator 3 that presses the disc rotor 5 are provided. The brake pad 4 has a plurality of pressing members 45 in a plurality of insertion holes 41b provided on the back side of the contact surfaces 41a of the plurality of friction materials 41, respectively. When each is inserted and the actuator 3 presses the brake pad 4 and the disk rotor 5, the pressing member 45 presses the bottom 41 c of the insertion hole 41 b toward the disk rotor 5 and presses the friction material 41 against the disk rotor 5. A pressure transmission mechanism 44 is provided.

  According to the brake device friction pair 2 according to the embodiment described above, the brake pad 4 having the plurality of friction materials 41 and the disk rotor that is in contact with the plurality of friction materials 41 and is relatively displaceable from the brake pad 4. 5, the brake pad 4 has a plurality of pressing members 45 inserted into a plurality of insertion holes 41 b provided on the back side of the contact surfaces 41 a of the plurality of friction materials 41, respectively. Are pressed, the pressing member 45 has a pressure transmission mechanism 44 that presses the bottom 41c of the insertion hole 41b toward the disk rotor 5 and presses the friction material 41 against the disk rotor 5, respectively.

  According to the brake pad 4 according to the embodiment described above, the plurality of friction materials 41 that contact the disk rotor 5 that rotates together with the wheels, and the plurality of friction materials 41 that are provided on the back side of the contact surfaces 41a of the plurality of friction materials 41, respectively. When a plurality of pressing members 45 are respectively inserted into the insertion holes 41b and pressed against the disk rotor 5, the pressing members 45 respectively press the bottom portions 41c of the insertion holes 41b toward the disk rotor 5 to press the friction material 41 into the disk. And a press transmission mechanism 44 that presses against the rotor 5.

  Accordingly, the brake device 1, the brake device friction pair 2, and the brake pad 4 can optimize the friction performance by, for example, stabilizing the area of the friction part. In addition, the brake device 1, the brake device friction pair 2, and the brake pad 4 can make the wear state of the plurality of friction materials 41 more uniform.

[Embodiment 2]
FIG. 10 is a partial cross-sectional view illustrating a schematic configuration of a friction pair for a brake device according to a second embodiment, and FIG. 11 is a schematic partial cross-sectional view illustrating pressing states of a plurality of friction materials of the brake device according to the second embodiment. It is. The brake device, the friction couple for brake device, and the brake pad according to the second embodiment are different from the first embodiment in the configuration of the pressure transmission mechanism. In addition, about the structure, effect | action, and effect which are common in embodiment mentioned above, while overlapping description is abbreviate | omitted as much as possible, the same code | symbol is attached | subjected.

  A brake device 201 according to the present embodiment shown in FIG. 10 includes a brake device friction pair 202 and an actuator 3 (see FIG. 2) as a pressing mechanism. The brake device friction pair 202 of this embodiment includes a brake pad 204 as a first member and a disk rotor (brake rotor) 5 as a second member. The brake pad 204 of the present embodiment includes a friction material 41 divided into a plurality of parts, a back metal 42 as a support member, a guide member 43, and a pressure transmission mechanism 244.

  The pressure transmission mechanism 244 is provided between the back metal 42 and the plurality of friction materials 41 with respect to the pressing direction. The pressure transmission mechanism 244 includes a plurality of pressing members 245 corresponding to the plurality of friction materials 41. Each pressing member 245 is formed in a rod shape, and is inserted into each insertion hole 41b of each friction material 41 one by one. The tip of the pressing member 245 contacts the bottom 41c of the insertion hole 41b.

  When the actuator 3 presses the brake pad 204 and the disk rotor 5, the pressing transmission mechanism 244 presses the bottom 41 c of the insertion hole 41 b toward the disk rotor 5 when the pressing member 245 presses the brake pad 204 and the disk rotor 5. 41 a is pressed against the contact surface 5 a of the disk rotor 5. The pressing member 245 is provided with a protrusion 245a at the tip, and the protrusion 245a makes point contact with the bottom 41c.

  The pressure transmission mechanism 244 transmits the pressing force from the actuator 3 to each friction material 41 in a distributed manner.

  As for the press transmission mechanism 244 of this embodiment, the several press member 245 is comprised with an elastic body. The plurality of pressing members 245 are interposed between the back metal 42 on which the pressing force from the actuator 3 acts and the plurality of friction materials 41. As described above, the end of each pressing member 245 contacts the bottom 41c of the insertion hole 41b via the protrusion 245a. Each pressing member 245 comes into contact with the back metal 42 at the base end (the end opposite to the end where the protrusion 245a is provided).

  Therefore, the pressing force transmission mechanism 244 can transmit the pressing force from the actuator 3 from the back metal 42 to each friction material 41 via each pressing member 245 constituted by an elastic body. At this time, the actuator 3 Can be distributed and transmitted to the respective friction members 41 in the same size. In other words, the press transmission mechanism 244 can transmit the load to each friction material 41 in a substantially uniform manner via each pressing member 245 constituted by an elastic body, and the contact surface 41a of each friction material 41 is transmitted to the disk. The contact surface 5a of the rotor 5 can be contacted.

  In the brake device 201 configured as described above, when the actuator 3 presses the brake pad 204 and the disk rotor 5, the pressing members 245 of the press transmission mechanism 244 respectively push the bottom 41 c of the insertion hole 41 b into the disk rotor 5. The contact surface 41 a of the friction material 41 is pressed against the contact surface 5 a of the disk rotor 5. As a result, the brake device 201 can reliably position the distal end portion of the pressing member 245 in the insertion hole 41b, and presses in the vicinity of the contact portion between the contact surface 41a and the contact surface 5a in the bottom portion 41c. The point of application of the pressing force from the member 245 can be positioned, that is, the point of application of the pressing force can be brought close to the friction braking surface between the contact surface 41a and the contact surface 5a. As a result, the brake device 201 can stably contact the contact surface 41a and the contact surface 5a to stabilize the area of the friction part, optimize the friction performance, for example, improve the wear performance, Performance and braking performance can be improved at the same time.

  Further, the brake device 201 is configured such that the brake pad 204 is divided into a plurality of friction materials 41 as a whole, and the bottom 41c of each insertion hole 41b is pressed against the contact surface 5a of the disc rotor 5 by the corresponding pressing member 245. Thus, as illustrated in FIG. 11, the contact surface 41 a of each friction material 41 can be pressed against the contact surface 5 a independently. As a result, the brake device 201 can make it easy for the contact surface 41a to follow the fine irregularities of the contact surface 5a, and thus the contact surfaces 41a and 5a are made of hard materials. Even if it exists, the contact area of the contact surface 41a and the contact surface 5a can be enlarged relatively, for example, a friction performance and braking performance can further be improved.

  More specifically, the brake device 201 corresponds to the magnitude of the reaction force received from each friction material 41 by each pressing member 245 constituted by an elastic body when a pressing force by the actuator 3 acts on the back metal 42. Since each pressing member 245 absorbs the displacement along the pressing direction of each friction material 41 by elastically deforming, the pressing force is dispersed by this pressing member 245 and is substantially uniform with respect to the plurality of friction materials 41. Act on.

  In the brake device 201, the pressing force transmission mechanism 244 distributes the pressing force from the actuator 3 to each friction material 41 in a substantially equal size and transmits the friction material 41 in a substantially uniform manner. It can be pressed, and it can be suppressed that the pressing load is biased to a specific location in the pad surface of the brake pad 204 (the surface facing the contact surface 5a) and the uneven load is generated. The brake device 201 can prevent a local increase in contact surface pressure, and can further improve, for example, friction performance and braking performance.

  The brake device 201, the brake device friction pair 202, and the brake pad 204 according to the embodiment described above can optimize the friction performance by stabilizing the area of the friction part, for example. Further, the brake device 201, the brake device friction pair 202, and the brake pad 204 can make the wear state of the plurality of friction materials 41 more uniform.

  In the brake device 201, the brake device friction pair 202, and the brake pad 204 according to the embodiment, the plurality of pressing members 245 are elastic bodies, and the back metal 42 and the plurality of friction materials 41 on which the pressing force from the actuator 3 acts. Therefore, it is possible to press the plurality of friction materials 41 almost uniformly and prevent an increase in local contact surface pressure. For example, the friction performance and the braking performance can be further improved. Can do.

  In addition, the brake device 201, the brake device friction pair 202, and the brake pad 204 have a plurality of friction materials 41 even when the brake pad 204 is caused to thermally expand due to, for example, friction heat generated during braking. Since each pressing member 245 elastically supports the displacement of each friction material 41, it is possible to absorb this displacement, thereby further stabilizing the friction area. For example, the friction performance can be optimized with respect to the thermal expansion of the brake pad 204.

  The brake device, the friction pair for brake device, and the brake pad according to the above-described embodiment of the present invention are not limited to the above-described embodiment, and various modifications can be made within the scope described in the claims. .

  In the above description, the brake pads 4 and 204 are the first member and the disc rotor 5 is the second member. However, the present invention is not limited to this, and the disc rotor is the first member and the brake pad is the second member. It may be.

  In the above description, the friction material is described as being formed in a columnar shape (cylindrical shape), but is not limited thereto, and may be formed in a rectangular column shape (rectangular cylindrical shape), for example.

1,201 Brake device 2,202 Friction pair 3 actuator for brake device (pressing mechanism)
4,204 Brake pad (first member)
5 Disc rotor (second member)
5a Contact surface 41 Friction material 41a Contact surface (friction surface)
41b Insertion hole 41c Bottom 42 Back metal (supporting member)
43 Guide member 44, 244 Press transmission mechanism 45, 245 Press member 45a, 245a Projection 46 First swing member (swing member)
47, 48 Second swing member (swing member)

Claims (9)

A first member having a plurality of friction materials;
A second member in contact with the plurality of friction materials and capable of relative displacement with the first member;
A pressing mechanism for pressing the first member and the second member;
In the first member, a plurality of pressing members are respectively inserted into a plurality of insertion holes provided on the back side of the friction surfaces of the plurality of friction materials, and the pressing mechanism is configured by the first member and the second member. The pressing member has a pressure transmission mechanism that presses the bottom of the insertion hole toward the second member and presses the friction material against the second member.
Brake device. The pressing transmission mechanism is in point contact with the pressing member and the bottom of the insertion hole.
The brake device according to claim 1. The first member includes a guide member that guides the plurality of friction materials in a pressing direction by the pressing mechanism and restricts movement in a direction intersecting the pressing direction.
The brake device according to claim 1 or 2. The pressing transmission mechanism transmits the pressing force from the pressing mechanism in a distributed manner to each of the friction materials.
The brake device according to any one of claims 1 to 3. The pressing transmission mechanism includes a swinging member interposed between a supporting member to which a pressing force from the pressing mechanism acts and the plurality of pressing members, and the pressing force from the pressing mechanism is transmitted from the supporting member to the pressing member. Leveling and transmitting to the pressing member via the swing member;
The brake device according to any one of claims 1 to 4. The plurality of pressing members are elastic bodies, and are interposed between a supporting member on which a pressing force from the pressing mechanism acts and the plurality of friction materials.
The brake device according to any one of claims 1 to 4. Contact surfaces of the friction material and the second member are each made of a hard material,
The brake device according to any one of claims 1 to 6. A first member having a plurality of friction materials;
A second member that is in contact with the plurality of friction materials and is relatively displaceable with the first member;
In the first member, a plurality of pressing members are respectively inserted into a plurality of insertion holes provided on the back side of the friction surfaces of the plurality of friction materials, and the first member and the second member are pressed against each other. In this case, each of the pressing members has a pressure transmission mechanism that presses the bottom of the insertion hole toward the second member and presses the friction material against the second member.
Friction pair for brake equipment. A plurality of friction materials in contact with the disk rotor rotating with the wheels;
When a plurality of pressing members are respectively inserted into a plurality of insertion holes provided on the back sides of the friction surfaces of the plurality of friction materials and pressed against the disk rotor, the pressing members are respectively bottom portions of the insertion holes. A pressure transmission mechanism that presses the disk toward the disk rotor and presses the friction material against the disk rotor.
Brake pads.

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