JP5258948B2 - One-touch pad mounting mechanism - Google Patents

Description

  According to the present invention, a pad assembly is slidably mounted in an axial direction in a dovetail groove of a pad holder that is pivotally attached to a tip end portion of a brake arm, and anchor pins attached to the pad holder are orthogonal to the plate surface of the pad assembly and both axial sides The present invention relates to a one-touch pad mounting mechanism that comes into contact with an end portion and is prevented from coming off. To improve work efficiency and ensure safety by making one-touch replacement of pad assemblies in the field of vehicles equipped with brakes, especially caliper brakes for railways.

  Conventionally, particularly in a disc brake for a railway vehicle, since the relative movement between the sprung to which the brake is attached and the unsprung to which the disc rotor is attached is large, it is generally easy to make a large relative movement as a mechanism that can cope with this. There is known an insulator-type caliper brake by connecting an adaptable link. In such an insulator-type caliper brake, it is necessary to attach the pad assembly to a pad holder that is pivotally attached to the tip of the brake arm. Generally, when the pad assembly is attached to the pad holder, the pad assembly is attached to the pad holder. The anchor block, which is a fixing member, is mounted while supporting, and then the anchor bolt is fastened while holding the anchor block so that the anchor block does not come off and the pad assembly does not fall.

  However, in heavy-duty disc brakes for railway vehicles, detaching anchor bolts while holding the anchor block, and detaching anchor blocks while supporting the pad assembly are both cumbersome and dangerous, and are difficult for the entire connected vehicle. Replacing the pad assembly is more difficult and requires a lot of time, which is a heavy burden on the operator. For this reason, it has been proposed that after the pad assembly is slid and mounted on the pad holder, the pad assembly is simply fixed to the pad holder using a push pin and a spacer. And what is slid and mounted | worn with a pad assembly in such a pad holder is proposed (for example, refer patent document 1 below).

Japanese Patent Laying-Open No. 2006-2853 (see claims)

  The disk brake pad holding device disclosed in Patent Document 1 will be briefly described with reference to FIG. 10. As shown in FIGS. 10A, 10B, and 10C, the pad holder 102 has dovetail grooves 102a and dovetails. One end side of the pad 130 slid and attached by the key 130a (lower side of FIG. 10A) is pivoted to the pad 130 side by the U spring 125 around the shaft 113 by the fall prevention member 120. As shown in FIG. 10D, the other end of the pad 130 is elastically restrained by a play-preventing spring 109 protruding from the slit 107 to the dovetail side, as shown in FIG. As the slide direction dropout and backlash are absorbed, as shown in FIG. 10A, the arms 115a, 11 having the shaft 113 as the center of swinging are also provided. Magnets 115 and 115 installed at the respective tips of a pass through the through-holes 116 and 116 in the pad holder 102 and are attracted to the back surface of the pad 130, so that the sleeper direction of the pad 130 (vertical direction in FIG. 10C) ) Is absorbed.

  With these configurations, the play in the sliding direction and the sleeper direction after mounting the pad on the pad holder by the sliding method can be effectively absorbed. However, the conventional pad holding device requires a large number of parts exposed to the outside such as the shaft 113, the arm 115a, and the magnet 115 in order to absorb the backlash in the direction of the sleeper of the pad. In addition to being complicated, the vehicle was constantly exposed to the risk of damage to these parts due to external obstacles.

  Therefore, the present invention solves the problems in the conventional one-touch pad mounting mechanism by slide mounting, and adopts a simple structure anchor pin, so that there is no risk of damage due to obstacles from the outside, and slide mounting and dismounting is possible. Provide a one-touch pad mounting mechanism that is simple, safe and highly efficient.

  For this reason, the present invention is such that the pad assembly is slidably mounted in the axial direction in the dovetail groove of the pad holder that is pivotally attached to the tip of the brake arm, and the anchor pin attached to the pad holder is orthogonal to the plate surface of the pad assembly and the shaft In the one-touch type pad mounting mechanism that comes into contact with both side ends in the direction and is prevented from coming off, the anchor pin located at least on the lower side is capable of moving forward and backward in the direction perpendicular to the plate surface and pivotably locked at an opposing position of 180 ° The movable anchor pin is configured to be freely configured, and the contact surface of the anchor pin with the end of the pad assembly at the opposite position is a lock surface that prevents the pad assembly from moving and an inclined surface that allows the pad assembly to move. It is characterized by that. Further, the present invention is characterized in that the anchor pin located at least on the upper side attached to the pad holder is constituted by a normal fixing pin. Further, according to the present invention, the movable anchor pin has a plate urged to a lock position in a regulating groove in the pad holder by a spring accommodated in the movable anchor pin, and is inserted from the back surface of the pad holder. The movable anchor pin can be rotated by the tool or the like by allowing the plate to escape from the regulation groove in the pad holder against the biasing force of the spring by, for example, A means for solving the problem.

  According to the present invention, the pad assembly is slidably mounted in the axial direction in the dovetail groove of the pad holder that is axially attached to the tip of the brake arm, and the anchor pin attached to the pad holder is the pad. In the one-touch type pad mounting mechanism that is perpendicular to the plate surface of the assembly and that is prevented from coming off by coming into contact with both end portions in the axial direction, the anchor pin located at least on the lower side is capable of advancing and retracting in the direction perpendicular to the plate surface. Inclination that allows the movement of the pad assembly and the lock surface that prevents the pad assembly from moving at the contact surface of the anchor pin with the end of the pad assembly at the opposite position at the opposite position. Because it is composed of movable anchor pins formed on the surface, pad up is provided inside the movable anchor pins. A lock mechanism such as a spring or plate that prevents the movement of the assembly can be accommodated, the mechanism is not exposed to the outside, there is no risk of damage, and at the time of replacing the pad assembly, etc., the movable anchor pin located at least on the lower side Since the pad assembly can be easily moved or prevented from moving by simply rotating, the operation can be performed safely and smoothly.

  In addition, when the anchor pin located at least on the upper side mounted on the pad holder, which is a constituent element of claim 2, is configured with a normal fixing pin, safety must be taken into consideration on the lower side. The anchor pin may be a movable anchor pin having a slightly complicated structure, and the anchor pin positioned on the upper side may be configured by a normal fixed pin, and the cost can be reduced. Furthermore, the movable anchor pin, which is a constituent element of claim 3, has a plate urged to a locked position in a regulation groove in the pad holder by a spring accommodated in the movable anchor pin, When the movable anchor pin is configured to be able to roll by the tool or the like by causing the plate to escape from the regulation groove in the pad holder against the biasing force of the spring by a tool or the like inserted from the back side, the pad holder Following the operation of pressing and releasing the plate against the urging force of the spring by a tool inserted from the back of the plate, a series of operations that can rotate the movable anchor pin enables sliding movement and blocking of the pad assembly, The pad assembly can be easily and quickly attached and detached with one hand.

It is principal part sectional drawing of the removal | desorption process to the pad holder of the pad assembly in the one-touch type pad mounting mechanism of this invention. It is the whole perspective view seen from the upper part side of the brake device with which the one-touch type pad mounting mechanism was adopted. It is the whole perspective view seen from the lower part side of the brake device with which the one-touch type pad mounting mechanism was employ | adopted. It is a principal part expanded sectional view containing a movable anchor pin same as the above. FIG. 2 is an overall side view of the brake device before mounting the pad assembly. FIG. 3 is an overall side view of the brake device just before mounting the pad assembly and a cross-sectional view including a holder shaft. FIG. 2 is an overall side view of the brake device with the pad assembly mounted thereon, and a cross-sectional view including a holder shaft. FIG. 2 is an overall side view of the brake device with the pad assembly being removed, and a cross-sectional view including a holder shaft. It is the whole front view of the partial cross section of the brake device by which the one-touch type pad mounting mechanism was employ | adopted. It is explanatory drawing of the pad holding | maintenance apparatus of the conventional disc brake.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for implementing a one-touch pad mounting mechanism of the invention will be described with reference to the drawings. As shown in FIG. 1, the one-touch pad mounting mechanism of the present invention has a pad assembly 5 slidably mounted in an axial direction in a dovetail groove 4 </ b> A of a pad holder 4 that is pivotally attached to the tip of a brake arm 3. In the one-touch type pad mounting mechanism in which the anchor pins 6 and 10 mounted on 4 are perpendicular to the plate surface of the pad assembly 5 and are in contact with both end portions in the axial direction to prevent the anchor pins from being detached, It is configured to be movable back and forth in the direction orthogonal to the plate surface, and to be rotatable so as to be locked at an opposing position of 180 °, and the contact surface of the anchor pin with the end of the pad assembly at the opposing position is prevented from moving the pad assembly. Consists of a movable anchor pin 6 formed on an inclined surface 6B that enables movement of the lock surface 6C and the pad assembly. Characterized in that it has been.

  Embodiments of the one-touch pad mounting mechanism of the present invention will be described below. FIG. 2 is an overall perspective view as seen from the upper side of the brake device employing the one-touch pad mounting mechanism, and FIG. 3 is a perspective view as seen from the lower side of the brake device. The use mode of the brake device employing the one-touch pad mounting mechanism of the present invention is as follows. A disk assembly (not shown) is mounted by a pad assembly 5 (see FIG. 9) mounted on a pad holder 4 pivotally attached to the tip of the brake arm 3. The brake operation is performed by pressure-contacting both sides of the rotor. At that time, at least the fixed anchor pin 10 described later is supported on the stationary part of the vehicle body in such a manner that the fixed anchor pin 10 is on the upper side and the movable anchor pin 6 is on the lower side. 1 is fixed. A rod or the like that moves forward / backward through a booster mechanism or the like by a motor gear unit that is housed in a caliper body 2 fixed via the support 1 and that is composed of an electric motor and a speed reduction mechanism, or a hydraulic drive mechanism. The base ends of the brake arms 3 and 3 are configured to advance and retract.

  The middle part of the brake arm 3 is pivotally supported by the arm shaft 11 with respect to the caliper body 2. A pad holder 4 is pivotally attached to a tip end portion of the brake arm 3 by a holder shaft 12. A dovetail groove 4A is engraved in the axial direction (of the arm shaft 11 and the holder shaft 12) on the opposing surface which is the inside of the plate surface of each pair of pad holders 4, and a pad which will be described later with respect to the dovetail groove 4A. The assembly 5 is slid and inserted from the lower side of FIG. A fixed anchor pin 10, which is a normal pin, is fixedly mounted on the upper side facing the dovetail groove 4 </ b> A in these pad holders 4. The fixed anchor pin 10 has a cylindrical shape composed of a large-diameter portion and a small-diameter portion 10A in which a retaining ring circumferential groove 10F is engraved, and the small-diameter portion 10A is formed in a hole formed in the corresponding pad holder 4. Inserted, the retaining ring 9 is locked to the retaining ring circumferential groove 10 </ b> F on the back surface of the pad holder 4, and the fixed anchor pin 10 is fixed to the pad holder 4. The large diameter portion of the fixed anchor pin 10 is brought into contact with the upper end portion 5U (see FIGS. 6A and 6B) of the pad assembly 5 slidably mounted from the lower side, and the upper portion of the pad assembly 5 beyond that. Restrict movement to the side.

  The movable anchor pin 6 mounted on the lower side of the pad holder 4 will be described with reference to FIGS. 3 and 4. Similar to the fixed anchor pin 10, the movable anchor pin 6 mounted on the lower side facing the dovetail groove 4 </ b> A in the pad holder 4 includes a large diameter portion and a small diameter portion 6 </ b> A in which a retaining ring circumferential groove 6 </ b> F is formed. The small diameter portion 6A is inserted into a hole formed in the corresponding pad holder 4, and the retaining ring 9 is engaged with the retaining ring circumferential groove 6F on the back surface of the pad holder 4. To the pad holder 4. A plate insertion groove 6D is formed in the axial direction (advancing and retracting direction of the movable anchor pin 6) from the large diameter portion to the small diameter portion 6A of the movable anchor pin 6. A rectangular plate 8 urged toward the pad holder 4 by a pair of springs 7 is accommodated in the plate insertion groove 6D. Although not clearly shown in the drawing, the rectangular plate 8 is regulated by the spring 7 at the bottom of the hole where the movable anchor pin 6 is inserted and mounted in the pad holder 4 and is energized and accommodated by the spring 7 without excess or deficiency. A rectangular regulation groove is engraved. FIG. 4 shows the state assembled in such a manner.

  The small diameter portion 6A of the movable anchor pin 6 is provided with, for example, a hexagonal hole 6E for a hexagonal tool. The plate 8 is attached to the spring 7 by a hexagonal tool or the like inserted from the back of the pad holder 4. The movable anchor pin 6 can be continuously rotated by a series of operations by pressing against the urging force to escape from the regulation groove of the pad holder 4. After the movable anchor pin 6 is rotated 180 °, the pressing force by the tool is released, so that the plate 8 is again accommodated in the restriction groove of the pad holder 4 by the urging force of the spring 7 and its rotation is restricted. . As will be described in detail later, as shown in FIG. 1 which is a desorption process diagram, the large-diameter portion of the movable anchor pin 6 is positioned at the opposite end of the pad assembly 5 at the opposite position of 180 ° where the rotation is restricted. (5D: see FIG. 8 (A)) is formed with an upright lock surface 6C that restricts and prevents sliding movement in the downward direction toward the lower side, and an inclined surface 6B that allows the pad assembly 5 to move. . When the pad assembly 5 presses the inclined surface 6B and slides, the movable anchor pin 6 compresses the spring 7 while the plate 8 is accommodated in the restriction groove in the pad holder 4 so that the plate of the pad assembly 5 is compressed. It is possible to move backward in a direction perpendicular to the surface.

  The process of detaching the pad assembly from the pad holder will be described with reference to FIG. FIG. 1A shows a slide regulation state by a movable anchor pin 6 which is the lower side of the state where the pad assembly 5 is mounted on the pad holder 4. The lock surface 6C of the movable anchor pin 6 regulates the sliding movement of the lower side end portion (5D: see FIG. 8A) of the pad assembly 5. Next, a tool or the like is inserted from the direction of the white arrow in FIG. 1B, and the movable anchor pin 6 is rotated by pressing the plate 8 against the biasing force of the spring 7 to escape from the regulation groove of the pad holder 7. Move. FIG. 1C shows a state in which the movable anchor pin 6 has been rotated to an opposing position of 180 °. In this state, the inclined surface 6 </ b> B of the movable anchor pin 6 faces the lower end portion of the pad assembly 5. Then, as shown in FIG. 1 (D), the lower end of the pad assembly 5 presses and pushes up the inclined surface 6B of the movable anchor pin 6, and at the same time, the movable anchor pin 6 is perpendicular to the plate surface as indicated by a small white arrow. The pad assembly 5 is allowed to slide to the lower side of the pad assembly 5, so that the pad assembly 5 is removed from the pad holder 4 (large white arrow).

  Next, when the maintenance / inspection of the pad assembly 5 is completed, or when the pad assembly 5 is replaced with a new one, as shown in FIG. 1 (E), the movable anchor pin 6 is rotated 180 ° again with a tool or the like to lower the inclined surface 6B. The movable anchor pin 6 is retracted in the direction perpendicular to the plate surface by the upper end 5U (see also FIG. 6A) in the pad assembly 5 (small white arrow in FIG. 1F), and the pad Slide movement to the upper side of the assembly 5 (large white arrow in FIG. 1 (F)) becomes possible, and as shown in FIG. 1 (F), slide mounting on the upper side of the pad assembly 5 is performed. FIG. 1 (G) shows a state in which the pad assembly 5 is completely attached to the pad holder 4 in this way, and the sliding movement of the pad assembly 5 to the lower side is restricted by the lock surface 6C of the movable anchor pin 6. It is shown.

  FIG. 5 is an overall side view of the brake device before the pad assembly 5 is mounted on the pad holder 4. Therefore, the pad assembly 5 is not shown. The right side of the drawing shows the upper side where the fixed anchor pin 10 is attached and fixed, and the left side of the drawing shows the lower side where the movable anchor pin 6 is attached and fixed, and the state where the holder shaft 12 is attached to the front end side of the brake arm 3 is understood. Is done. 6A and 6C are an overall side view of the brake device just before the pad assembly 5 is mounted on the pad holder 4 and a cross-sectional view including the holder shaft. The semi-circular upper end 5U of the pad assembly 5 is shown in FIGS. Shows a state immediately before contact with the inclined surface 6B of the movable anchor pin 6. 6 (B) is shown upside down from FIG. 6 (C), but shows a state in which the pad assembly 5 is completely attached to the pad holder 4, and the upper side is the upper part due to the large diameter portion of the fixed anchor pin 10. The sliding movement to the lower side is restricted and the lower side is restricted by the lock surface 6C of the anchor pin 6 which is possible to the lower side.

  FIGS. 7A and 7B are an overall side view of the brake device in which the pad assembly is completely mounted, and a cross-sectional view including a holder shaft. On the upper side, sliding movement to the upper side is restricted and prevented by the large diameter portion of the fixed anchor pin 10, and on the lower side, sliding movement to the lower side is restricted and prevented by the lock surface 6 </ b> C of the anchor pin 6. FIG. 7C shows a state in which the movable anchor pin 6 has been rotated 180 ° by a tool or the like, and a state in which the pad assembly 5 is about to be removed from the pad holder 4. FIG. 9 is an overall front view of a partial cross-section of the brake device in a state where the pad assembly is completely mounted. In other words, FIG. 9 shows a state where the pad assembly 5 is mounted on the brake device shown in FIG.

  FIGS. 8A and 8C are an overall side view of the brake device from which the pad assembly 5 is being removed and a cross-sectional view including a holder shaft. A semicircular arc-shaped lower end 5D of the pad assembly 5 is inclined by the movable anchor pin 6. After the movable anchor pin 6 is moved backward by coming into contact with the surface 6B, the pad assembly 5 is slid to the lower side and pulled out. 8B is upside down from FIG. 8C, but is similar to the state of FIG. 7B, in which the pad assembly 5 is mounted on the pad holder 4 and the upper side is a fixed anchor pin. The sliding movement to the upper side is restricted and prevented by the large diameter portion of 10, and the sliding movement to the lower side is restricted and prevented by the lock surface 6 </ b> C of the anchor pin 6 that can move the lower side. From this state, as shown in FIG. 7C, the pad assembly 5 is pulled out and removed from the pad holder 4 from a state where the movable anchor pin 6 is rotated 180 ° with a tool or the like.

  Thus, according to the one-touch pad mounting mechanism of the present invention, the lock mechanism such as the spring 7 and the plate 8 for preventing the movement of the pad assembly 5 can be accommodated inside the movable anchor pin 6 so that the mechanism is not exposed to the outside and is damaged. When replacing the pad assembly 5, etc., the pad assembly 5 can be simply moved or prevented from moving by simply rotating the movable anchor pin 6 located at the lower side, so that it is safe and smooth. The anchor pin on the lower side, which can be operated in a safe manner, is a movable anchor pin 6 having a slightly complicated structure, and the anchor pin 10 located on the upper side may be configured with a normal fixed pin, thereby reducing costs. Can be achieved. Further, following the operation of pressing and releasing the plate 8 against the urging force of the spring 7 with a tool or the like inserted from the back surface of the pad holder 4, the slide of the pad assembly 5 is performed by a series of operations capable of rotating the movable anchor pin 6. Since it can be moved and blocked, the pad assembly 5 can be easily and quickly attached and detached with one hand.

  As described above, the embodiments of the present invention have been described. Within the scope of the present invention, the type of an electric motor, a speed reduction mechanism, a hydraulic mechanism, or the like, which is an actuator that moves the base end of the brake arm forward and backward to swing, Attached form of the pad holder to the tip of the brake arm, engraved form of dovetail groove in the pad holder, attached form of the fixed anchor pin and movable anchor pin to the pad holder (in addition to retaining locking with a retaining ring, Adopting fixed bolts, etc.), cross-sectional shape of fixed anchor pin (it does not rotate like movable anchor pin, so it is not limited to a cylindrical body of circular cross section), shape of spring accommodated in movable anchor pin (coiled shape of embodiment) In addition to springs, leaf springs can also be used), types and plate shapes (in addition to the rectangles in the examples, non-circular shapes such as oblong shapes can be adopted) ), Type, engraving form of the regulating groove in the pad holder in which the plate is accommodated (the depth of the regulating groove is made approximately equal to or larger than the thickness of the plate so that the rotation of the plate is sufficiently restricted) And the shape of the locking surface of the anchor pin (a semi-arc-shaped standing surface that stands perpendicular to the plate surface of the pad assembly is suitable, but is not limited to an orthogonal standing surface if the pad assembly does not fall off). Can be selected as appropriate.

  In addition, the shape of the inclined surface including the inclination angle (configured by cutting the cylindrical semicircular arc surface flat at a predetermined angle, but not a straight flat inclined surface, but a curved inclined surface. The shape of the upper side end surface and the lower side end surface of the pad assembly is preferably a semicircular arc surface that matches the cross-sectional shape of the fixed anchor pin or the movable anchor pin as in the embodiment, but is linear. The cross-sectional shape of the tool hole in the movable anchor pin (in addition to the hexagonal tool of the embodiment, an appropriate cross-sectional shape can be adopted if it is non-circular), the arrangement form of the movable anchor pin (the movable anchor pin is Although it is disposed at least on the lower side, it does not prevent the movable anchor pin from being disposed on the upper side so that the pad assembly can be removed also on the upper side. Kill. In addition, the specifications described in the examples are merely examples in all respects and should not be interpreted in a limited manner.

  The one-touch type pad mounting mechanism of the present invention preferably improves work efficiency and secures safety by making one-touch replacement of the pad assembly in the field of vehicles equipped with a brake, particularly a rail caliper brake. However, it can also be used as a pad mounting mechanism in vehicle brakes other than railway vehicles.

3 Brake arm 4 Pad holder 4A Dovetail groove 5 Pad assembly 5U Upper end 6 Movable anchor pin 6B Inclined surface 6C Lock surface 7 Spring 8 Plate 10 Fixed anchor pin 12 Holder shaft

Claims (3)

The pad assembly is slid in the axial direction in the dovetail groove of the pad holder that is pivotally attached to the tip of the brake arm, and the anchor pins attached to the pad holder are perpendicular to the plate surface of the pad assembly and are in contact with both axial ends. In the one-touch type pad mounting mechanism that is prevented from coming off by contact, the anchor pin located at least on the lower side is configured to be movable back and forth in the direction perpendicular to the plate surface and to be rotatable so as to be lockable at an opposing position of 180 °. The contact surface of the anchor pin with the end of the pad assembly at the opposite position is constituted by a movable anchor pin formed on a locking surface for preventing the movement of the pad assembly and an inclined surface for allowing the movement of the pad assembly. One-touch pad mounting mechanism. The one-touch pad mounting mechanism according to claim 1, wherein the anchor pin positioned at least on the upper side mounted on the pad holder is configured by a normal fixing pin. The movable anchor pin has a plate biased to a lock position in a regulation groove in the pad holder by a spring accommodated in the movable anchor pin, and the plate is moved by a tool inserted from the back surface of the pad holder. 3. The one-touch type according to claim 1, wherein the movable anchor pin can be rotated by the tool or the like by allowing it to escape from the regulation groove in the pad holder against the biasing force of the spring. Pad mounting mechanism.

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