JP4921296B2 - Disc brake lever brake sliding link mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lever brake sliding type link mechanism of a disc brake which can prevent the link mechanism from staggering by giving a predetermined friction to the lever type brake sliding type link mechanism by the friction member. <P>SOLUTION: The disc brake comprises a substrate, a pair of brake arms 1 supported turnably and swingably with the degree of freedom in every direction through a spherical bearing against the substrate 2, an actuator 6 provided in the substrate side and a link mechanism 5 to be operated by the actuator and in the disc brake composed so that the brake pad arranged in the other end part of the brake arm is pressed to the disc rotor by swinging and pressing a one end part of the pair of brake arms through the link mechanism by the operation of the actuator, and the lever type brake sliding type link mechanism of the disc brake includes the friction member 13 installed in a strut rod 9 of the link mechanism. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention swings and presses one end of a pair of brake arms via a link mechanism by the operation of an actuator provided on the base side, and presses and holds a brake pad installed at the other end of the brake arm on the disc rotor. In the disc brake configured to do so, the disc brake lever brake sliding mechanism can prevent the link mechanism from wobbling by giving a predetermined friction to the lever brake sliding link mechanism of the brake by a friction member. It relates to a mold link mechanism.

  In a disc brake device used in a vehicle, particularly in a disc brake for a railway vehicle (a caliper brake for a rail vehicle), the relative movement between the spring on which the brake is attached and the unspring on which the disc rotor is attached is large. A mechanism capable of coping with this is required, and an insulator type brake by connecting links that can be easily adapted to a large relative movement is generally known (see Patent Document 1).

JP 2006-315422 A

  The configuration of the conventional example will be briefly described with reference to FIG. 5. This railway disc brake device (railway car caliper brake) has brake heads 207 and 207 having brake pads attached to which the disc D is clamped. Are equipped with two caliper levers (brake arms) 206 and 206, respectively, and an actuator 214 having a movable rod 215 driven in at least one of the advancing direction and the retracting direction. 201 includes a rotation transmission arm 216 that is pivotally connected to the movable rod 215, and a telescopic shaft 210 that engages with the rotation transmission arm 216. In this apparatus, the screw body 213 is pushed outward by the screw mechanism by the pushing rotation of the rotation transmission arm 216 accompanying the advancement of the actuator 214, and the brake arms 206, 206 are swung around the support pin 205, The brake heads 207 and 207 to which the brake pads are attached pinch the disk D, and the braking operation is performed. When the brake pad wears, the end of the notch 220 of the cam plate 219 comes into contact with the gap adjusting rod 221 fixed to the base due to the excessive stroke of the rotation transmission arm 216, the worm gear 217 rotates, and the gap adjusting gear 218. Rotates and automatic gap adjustment is performed.

  In the conventional example, the advance operation of the movable rod 215 is converted into the extension operation of the telescopic shaft 210 via the rotation transmission arm 216, and the force is increased and transmitted to the caliper levers 206 and 206. It has become. In addition, since the rotation transmission arm 216 constituting the boost conversion mechanism is provided with a gap adjustment mechanism including the cam plate 219, the notch 220, the worm gear 217, the gap adjustment gear 218, etc., the gap between the disk D and the brake pad. Can be provided with a compact configuration of the high-performance disc brake device 201 capable of automatically adjusting.

The above-described conventional caliper brake for a railway vehicle has a large relative displacement between the spring on which the brake pad is attached and the unsprung part on which the disc is attached. Therefore, the fulcrum (the lever part) of the body (base) and the caliper lever (brake arm) Spherical bearings are provided to provide flexibility and cope with disc overturning.
In addition, the current lever type brake (the brake method that operates the brake by swinging the brake arm around the lever fulcrum) employs a method that swings the entire caliper brake as a method of canceling the misalignment between the wheel center and the caliper center. ing.

However, in this method, when the disc rotor moves in the axial direction, the brake pad is hit by the disc rotor, and the force is transmitted to the actuator through the brake arm, sometimes causing unexpected damage to the actuator. There is. For this reason, at present, in order to protect the actuator, a parallelogram link is interposed between the actuator and the brake arm to reduce the impact on the actuator.
However, when a link mechanism is interposed between the actuator and the brake arm, there has been a problem that the lever cannot be centered due to the swinging of the link.

  Therefore, the present invention provides a friction member on the straddle rod that constitutes the link mechanism that connects the actuator and the brake arm, and the frictional force eliminates the wobbling of the link mechanism and suppresses the vibration of the lever part and the brake pad part. With the goal.

For this reason, the present invention
A base, a pair of brake arms supported so as to be capable of turning and swinging with respect to the base through spherical bearings in all directions, an actuator provided on the base, and the actuator A link mechanism is provided, and one end of the pair of brake arms is swung and pressed via the link mechanism by the operation of the actuator, and a brake pad installed at the other end of the brake arm is pressed against the disc rotor. In the constructed disc brake, the link mechanism is configured as a parallelogram link as a whole from the first link 7, the second link 8, the straddle rod 9, and the actuator rod 10 connected to the actuator 6. A friction member is arranged on the straddle rod, and the straddle rod is moved by the friction member. A lever brake slide type link mechanism of the disc brake, characterized in that the limit.
The friction member is a lever-type brake sliding link mechanism for a disc brake, wherein the friction member is constituted by a sliding plate for sandwiching a straddle rod.
The sliding plate is a lever-type brake sliding link mechanism for a disc brake, wherein the sliding plate is pressed against the straddle rod by an elastic member.
The sliding plate is a lever type brake sliding link mechanism for a disc brake, wherein a friction material is provided on the sliding plate.

According to the present invention,
If the gap between the brake pad and the disc rotor does not become uniform on the left and right due to actuator mounting misalignment, brake pad uneven wear, etc., hold the straddled rod to the left and right each time the brake is braked. The wobbling of the link mechanism can be prevented.
Further, the straddling rod moves up and down due to the link mechanism spreading left and right when the actuator is operated. Therefore, by forming the straddle rod so as to be sandwiched between the friction members, an effective friction force can be applied to the straddle rod even if the straddle rod moves up and down.
And so on.

  According to the present invention, a friction member is provided on a straddled rod constituting a link mechanism that connects an actuator and a brake arm, and the frictional force eliminates wobbling of the link mechanism and suppresses vibration of the lever part and the brake pad part.

  Hereinafter, a preferred embodiment of a disc brake according to the present invention will be described with reference to the drawings. FIG. 1 (a) is a schematic front view of the disc brake of the present invention, (b) is a side view of the brake, (C) is a plan view of the brake (the bolt for attaching the sliding plate is omitted), (a) is a perspective view with the brake pad assembly of the disc brake removed, (b) is a perspective view of the brake pad assembly, ( c) is a perspective view of the disc brake with the brake pad assembly attached (bolts for attaching the sliding plate are omitted), FIG. 3 is a perspective view of a sliding plate for applying friction to the straddle rod, and FIG. It is AA sectional drawing in (c).

  The schematic configuration of the disc brake according to the present invention will be described with reference to FIGS. 1 and 2. The brake includes a pair of brake arms 1 arranged to face a disc rotor (not shown). The brake arm 1 is axially supported so that it can swing relative to the base 2 around a fulcrum (lever part) 3 provided on the base 2. A spherical bearing is disposed at the fulcrum 3, and the brake arm 1 can freely swing with respect to the base body 2 by this spherical bearing. A pad holding member 4 is attached to the lower end of the brake arm 1 in the figure, and a known brake pad assembly 4 a is attached to the pad holding member 4. A link mechanism 5 disposed on the base 2 is coupled to the upper end of the brake arm 1 in the figure, and a known actuator 6 for expanding the brake arm 1 is coupled to the link mechanism 5.

  In FIG. 2, the link mechanism 5 is arranged on the upper surface of the base 2 as shown, and this link mechanism 5 is composed of a first link 7, a second link 8, a straddled rod 9, and an actuator rod 10 connected to the actuator 6. Has been. The first link 7 and the second link 8 are connected at one end side to a straddle rod 9 by a straddle rod pin 11, and the other end side of the first link 7 and the second link 8 is in contact with the actuator rod 10. They are connected by pins or the like not shown, and are configured as parallel row quadrilateral links as a whole. Further, rods 12 for transmitting the force from the actuator 6 to each brake arm 1 are attached to the first link 7 and the second link 8.

  Two friction members 13 (slip plates: see FIGS. 3 and 4) are arranged so that the straddle rod 9 is sandwiched between the straddle rods 9 connected to the first link 7 and the second link 8. As shown in FIG. 4, the sliding plate 13 sandwiches the straddle rod 9 with bolts 15 that are screwed into the base via elastic members (springs or the like) 14. As shown in FIG. 3, the sliding plate 13 is provided with a friction material 13 a, and the friction material 13 a is disposed so as to face the straddle rod 9. The sliding plate 13 holds the straddled rod 9 by the frictional force of the friction material 13 a, but when a force that overcomes the frictional force acts on the straddling rod 9, the straddling rod 9 slides between the sliding plates 13. That is, the straddle rod 9 is restricted from freely moving in the axial direction by the action of the friction material 13a.

  The operation of the link mechanism 5 having the above configuration will be described. First, the actuator 6 is operated to operate the brake. By the operation of the actuator 6, the first link 7 and the second link 8 swing left and right around the strut pin 11, and a force acts on the distal ends of the left and right brake arms 1 through the rod 12 by this swing. When force is applied to the distal ends of the left and right brake arms 1, each brake arm 1 swings around a fulcrum 3, and a brake pad assembly 4a provided on a pad holding member 4 attached to the lower end of each brake arm 1 is a disc rotor. The disc rotor is clamped by the left and right brake pad assemblies 4a, and the brake works.

During this operation, if the mounting position of the actuator 6 is misaligned, or if the brake pad 4a provided on the pad holding member 4 is unevenly worn and the gap between the brake pad and the disc rotor does not become uniform on the left and right, The straddle rod 9 moves to the left and right against the frictional force of the friction material provided on the sliding plate. When the brake is released, the position of the straddle rod 9 at that time is held by the sliding plate 13. Thus, when the brake is operated, the position of the straddle rod 9 at the time of the previous brake operation is always maintained, and the deviation between the wheel center and the caliper center can be canceled. Further, the action of the sliding plate 13 can suppress the vibration of the lever part (fulcrum) and the brake pad part due to the wobbling of the link mechanism 5.

  Although the embodiments of the present invention have been described above, the shape of the sliding plate, the material of the friction member provided on the sliding plate, the shape, and the like can be appropriately selected at the time of design within the scope of the present invention. Moreover, in order to prevent the wobbling of the link mechanism 5, the same effect can be achieved even if a sliding plate is disposed on the first link and the second link. Also, various connection methods can be employed as long as the link connection method can realize free link movement. Furthermore, the specifications described in the embodiments are merely examples in all respects and should not be interpreted in a limited manner.

  The present invention can be used for a disc brake.

(A) is a schematic front view of the disc brake of this invention, (b) is a side view of the brake, and (c) is a plan view of the brake. (A) is a perspective view with the brake pad assembly of the disc brake removed, (b) is a perspective view of the brake pad assembly, (c) is a perspective view of the disc brake with the brake pad assembly attached (slip plate) Is omitted). It is a perspective view of the sliding plate for giving a friction to a straddle rod. It is AA sectional drawing in FIG. It is explanatory drawing of the conventional railway disc brake device.

Explanation of symbols

Reference Signs List 1 brake arm 2 base 3 fulcrum 4 pad holding member 4a brake pad assembly 5 link mechanism 6 actuator 7 first link 8 second link 9 straddled rod 10 actuator rod 11 straddled rod pin 12 rod 13 sliding plate 13a friction material 14 elastic member (Spring etc.)
15 volts

Claims (4)

A base, a pair of brake arms supported so as to be capable of turning and swinging with respect to the base through spherical bearings in all directions, an actuator provided on the base, and the actuator A link mechanism is provided, and one end of the pair of brake arms is swung and pressed via the link mechanism by the operation of the actuator, and a brake pad installed at the other end of the brake arm is pressed against the disc rotor. In the constructed disc brake, the link mechanism is configured as a parallelogram link as a whole from the first link 7, the second link 8, the straddle rod 9, and the actuator rod 10 connected to the actuator 6. A friction member is arranged on the straddle rod, and the straddle rod is moved by the friction member. Lever-type brake slide type link mechanism of the disc brake, characterized in that the limit. The lever-type brake sliding link mechanism for a disc brake according to claim 1, wherein the friction member is formed by a sliding plate that sandwiches the straddle rod. The lever-type brake sliding link mechanism for a disc brake according to claim 2, wherein the sliding plate is pressed against the straddle rod by an elastic member. The lever brake sliding link mechanism for a disc brake according to claim 2 or 3, wherein the sliding plate is provided with a friction material.

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