Brake shoe with attaching property

Abstract

The invention relates to a brake shoe with following performance. The brake shoe structurally comprises a shoe base and a shoe body opposite to the shoe base. A shaft hole for a brake shoe pin shaft to penetrate through is formed in the shoe seat, and a spherical bulge protruding out of one side, opposite to the shoe body, of the shoe seat is arranged in the middle of the side; the shoe body is a plate-shaped body, a friction plate is attached to the outer end face of the shoe body, a groove pit is formed in the middle of the inner end face of the shoe body, and the bottom face of the groove pit is a spherical bottom attached to the spherical protrusion on the shoe base. The shoe base and the shoe body are movably connected in an attached mode through a connecting piece, and a clearance gap capable of containing deflection of the shoe body is kept between the opposite faces of the shoe base and the shoe body. The problem that the service life of the brake shoe is shortened due to eccentric wear of the brake disc is solved, normal work of the brake shoe and a brake is guaranteed, accidents of brake failure of large equipment caused by the normal work are avoided, and use safety of the large equipment is guaranteed.

Description

Technical Field

[0001] The invention relates to a brake component of an electromagnetic brake, in particular to a brake shoe with attachment. Background Art

[0002] On some large equipment equipped with brake discs with larger diameters, one problem faced by the brakes that work with the brake discs to achieve braking is that the service life of the brake shoes installed on the brakes is generally lower than the design life, and is also much lower than the service life of the brake shoes in the brakes configured on other ordinary equipment. The reason is that the brake disc will swing when it rotates, causing eccentric wear on the brake shoes on the brake. However, due to the reasons of machining accuracy and installation and debugging, it is difficult to ensure that the braking surface of the brake disc is absolutely straight, resulting in a slight or small swing of the brake disc, and this swing becomes more obvious as the diameter of the brake disc increases. When braking a brake disc with a small swing, the brake shoes on the brake will inevitably wear eccentrically, thereby reducing the service life of the brake shoes. This situation has always existed and has not been effectively solved. Summary of the invention

[0003] The purpose of the present invention is to provide a brake shoe with attachment to solve the problem of reduced service life of the brake shoe caused by eccentric wear of the brake disc.

[0004] Purpose of the present invention is achieved in that: A brake shoe with attachment, comprising a shoe seat and a shoe body arranged opposite to the shoe seat; an axial hole for passing the brake shoe pin shaft is opened on the shoe seat, and a spherical protrusion protruding from the surface is provided in the middle of the side of the shoe seat opposite to the shoe body; the shoe body is a plate-shaped body, a friction plate is attached to its outer end surface, a groove is opened in the middle of the inner end surface, and the bottom surface of the groove is a spherical bottom that fits the spherical protrusion on the shoe seat; the shoe seat and the shoe body are closely connected by a connecting piece, and a clearance gap that can accommodate the deflection of the shoe body is maintained between the opposite surfaces of the two.

[0005] Furthermore, the connecting member is a permanent magnet block, which is embedded in a groove provided in the spherical protrusion of the shoe seat and fixed to the shoe seat by screws, so that the shoe body is attracted to the shoe seat by strong magnetic attraction, thereby realizing a close and movable connection between the shoe seat and the shoe body.

[0006] Furthermore, a reducing step hole is opened on the shoe seat, which passes through the shoe seat body and the spherical protrusion, and a reducing step hole is opened at a corresponding position on the shoe body, which passes through the shoe body and leads to the spherical groove; the connecting part includes a bolt and a disc spring, the bolt is passed through the reducing step hole on the shoe seat and the reducing step hole on the shoe body, the disc spring is sleeved on the bolt and is crimped at the reducing part of one of the reducing step holes through a nut to realize a close and movable connection between the shoe seat and the shoe body.

[0007] Furthermore, a limiting screw is passed through the shoe seat and faces the shoe body, and the front end of the limiting screw is inserted into a limiting hole provided at a relative position of the shoe body, and the diameter of the limiting hole is larger than the outer diameter of the screw section of the limiting screw.

[0008] The purpose of the present invention can also be achieved like this: A brake shoe with attachment, comprising a shoe seat and a shoe body arranged opposite to the shoe seat; the shoe body is a plate-shaped body, a friction plate is attached to its outer end surface, and a spherical protrusion protruding from the inner end surface is provided in the middle of the inner end surface; an axial hole for passing the brake shoe pin shaft is provided on the shoe seat, a groove is provided in the middle of one side of the shoe seat opposite to the shoe body, and the bottom surface of the groove is a spherical bottom that fits the spherical protrusion on the shoe body; the shoe seat and the shoe body are closely connected by a connecting piece, and a clearance gap that can accommodate the deflection of the shoe body is maintained between the opposite surfaces of the two.

[0009] Furthermore, the connecting member is a permanent magnet block, which is embedded in a groove provided in the spherical protrusion of the shoe body and fixed to the shoe body by screws, so that the shoe body is attracted to the shoe seat by strong magnetic attraction, thereby realizing a close and movable connection between the shoe seat and the shoe body.

[0010] Furthermore, a reducing step hole is opened on the shoe body, which passes through the shoe body and the spherical protrusion, and a reducing step hole is opened at a corresponding position on the shoe seat, which passes through the shoe body and leads to the spherical groove; the connecting part includes a bolt and a disc spring, the bolt is passed through the reducing step hole on the shoe seat and the reducing step hole on the shoe body, the disc spring is sleeved on the bolt and is crimped at the reducing part of one of the reducing step holes through a nut to realize a close and movable connection between the shoe seat and the shoe body.

[0011] Furthermore, a limiting screw is passed through the shoe seat and faces the shoe body, and the front end of the limiting screw is inserted into a limiting hole provided at a relative position of the shoe body, and the diameter of the limiting hole is larger than the outer diameter of the screw section of the limiting screw.

[0012] The present invention decomposes the brake shoe into a two-body structure of a shoe seat and a shoe body, and designs the connection between the shoe seat and the shoe body to be connected through the cooperation of a spherical protrusion and a groove pit, so that the shoe body can produce an appropriate small deflection relative to the shoe seat. When the brake is applied, the shoe body can move with the deflection of the brake disc, so that the braking surface of the brake shoe can be better attached to the disc surface of the brake disc for braking, thereby avoiding the rigid eccentric wear of the brake disc on the brake shoe, and completely solving the problem of reduced service life of the brake shoe caused by the eccentric wear of the brake disc, which not only ensures the normal operation of the brake shoe and the brake, but also avoids the occurrence of brake failure accidents caused by the eccentric wear of the brake disc, thereby ensuring the safe use of large equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of embodiment 1 of the present invention.

[0014] Figure 2 It is a structural diagram of embodiment 3 of the present invention.

[0015] Figure 3 It is a schematic diagram of the structure of the arm disc brake using Example 1.

[0016] Figure 4 yes Figure 3 Side view of the arm disc brake shown.

[0017] In the figure: 1, electromagnet, 2, adjusting nut, 3, adjusting screw, 4, right brake arm, 5, sensor pin, 6, sensor, 7, brake shoe pin, 8, base, 9, lower hinge shaft, 10, left brake arm, 11, brake spring, 12, spring pressure plate, 13, spring box, 14, upper hinge shaft, 15, brake release push rod, 16, electromagnetic push rod, 18, brake disc, 20, limit screw, 21, shoe seat, 22, shoe body, 23, friction plate, 24, strong magnetic block, 25, screw, 26, gasket, 27, bolt, 28, butterfly spring, 29, nut, 30, shaft hole, 31, connecting ear plate. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with embodiments and drawings.

[0019] Example 1 like Figure 1 As shown, the brake shoe includes two components, namely a shoe body 22 and a shoe seat 21 , and the shoe body 22 and the shoe seat 21 are arranged opposite to each other.

[0020] The structure of the shoe seat 21 is that two parallel connecting ear plates 31 are arranged on a vertical seat body base plate ( Figure 4), the two connecting ear plates 31 are perpendicular to the base plate of the seat body, and the same position on the two connecting ear plates 31 is provided with an axial hole 30 for passing through the brake shoe pin shaft, and the brake shoe pin shaft 7 ( Figure 3 ) passes through the axial hole 30 to hinge the shoe seat 21 on the brake arm of the brake. In order to install the sensor to detect the braking friction force of the brake, the axial hole 30 is specially designed to be a vertical oblong hole. In the middle of the side of the base plate of the shoe seat 21 opposite to the shoe body, there is a spherical protrusion protruding from the surface. In order to reduce the processing cost, the spherical protrusion can be integrally arranged on a base and processed separately, and then this part is welded to the reserved hole on the base plate to form a whole shoe seat. An embedding groove is opened at the top of the spherical protrusion of the shoe seat 21, and a permanent magnet 24 with strong magnetic attraction is embedded in the embedding groove and fixed to the shoe seat 21 by screws 25 to form a connecting piece between the shoe seat and the shoe body.

[0021] The shoe body 22 is a plate-like body, and its outer end surface is a braking surface, on which a friction plate 23 is pasted. A circular groove is formed in the middle of the inner end surface of the shoe body 22, and the bottom surface of the groove is a spherical bottom that fits with the spherical protrusion on the shoe seat. Under the attraction of the permanent magnet 24 on the shoe seat 21, the spherical protrusion on the shoe seat 21 fits tightly with the groove on the shoe body 22, thereby realizing a close-fitting movable connection between the shoe body 22 and the shoe seat 21, and, in the close-fitting state, a clearance gap that can accommodate the deflection of the shoe body is maintained between the opposite surfaces of the shoe body 22 and the shoe seat 21. In this way, when the brake is applied, the deflection external force of the brake disc 18 can be used to make the shoe body 22 produce a follow-up deflection that is basically consistent with the deflection of the brake disc 18, thereby maintaining a complete fit with the brake disc surface, thereby avoiding the eccentric wear of the brake disc on the brake shoe.

[0022] Figure 1 In the embodiment, a limiting screw 20 is inserted into the shoe seat 21 and faces the shoe body 22, and a limiting hole is opened at a relative position of the shoe body 22, and the diameter of the limiting hole is larger than the outer diameter of the screw section of the limiting screw 20. The front end of the limiting screw 20 on the shoe seat 21 is inserted into the limiting hole on the shoe body 22, which can prevent the shoe body 22 from deflecting excessively relative to the shoe seat 21.

[0023] Figure 3 , Figure 4 A specific structure of an arm disc brake is provided, in which the brake shoe with attachment of the first embodiment is installed.

[0024] The structure of this arm disc brake is that a left brake arm 10 and a right brake arm 4 are hinged on a base 8, and a brake shoe is respectively connected to each brake arm. Figure 3In the embodiment, the shoe seat 21 of the brake shoe is hinged to the right brake arm 4 through the brake shoe pin 7, and the shoe body 22 of the brake shoe is closely connected to the shoe seat 21. The shoe bodies 22 of the two brake shoes are arranged on both sides of the equipment brake disc 18, close to the edge of the brake disc.

[0025] The two brake arms 4 and 10 are also connected with a brake-on mechanism and a brake-off mechanism. The brake-on mechanism is a spring box 13 connected between the two brake arms 4 and 10, in which a brake spring 11 is arranged, and a spring pressure plate 12 is pressed at one end of the brake spring 11, and one end of the adjusting screw 3 is fixedly connected to the spring pressure plate 13, and the other end of the adjusting screw 3 passes through the brake spring 11 and then passes out from the right brake arm 4, and an adjusting nut 2 is screwed on the protruding end of the adjusting screw 3. The brake-off mechanism includes an electromagnet 1 and a brake-off push rod 15. The electromagnet 1 is fixed on the top platform of the right brake arm 4, and the brake-off push rod 15 is transversely fixedly arranged at the upper end of the left brake arm 4, and rests on the electromagnetic push rod 16 of the electromagnet 1.

[0026] Of course, the brake shoe of the present invention can also be installed on other types of brakes that apply braking force to a brake disc.

[0027] Example 2 See also Figure 1 The structure of this embodiment is basically the same as that of the embodiment 1, except that the spherical protrusion on the shoe seat 21 and the groove on the shoe body 22 in the embodiment 1 are interchanged. Specifically, a spherical protrusion protruding from the inner end surface of the shoe body 22 is provided in the middle part, and a groove is provided at the top of the spherical protrusion. A permanent magnet 24 with strong magnetic attraction is embedded in the groove and fixed to the shoe body 22 by a screw 25, forming a connecting piece between the shoe seat and the shoe body. A groove with a spherical bottom is provided in the middle part of the side opposite to the shoe body of the shoe seat 21. Under the attraction of the permanent magnet 24 on the shoe body 22, the spherical protrusion on the shoe body 22 is tightly fitted with the groove on the shoe seat 21, so that the shoe body 22 and the shoe seat 21 are connected in a close-fitting movable manner, and in the close-fitting state, a clearance gap is maintained between the opposite surfaces of the shoe body 22 and the shoe seat 21 to accommodate the deflection of the shoe body.

[0028] Example 3 like Figure 2 As shown, the structure of this embodiment is basically the same as that of embodiment 1, that is, a spherical protrusion is provided on the shoe seat 21, and a groove with a spherical bottom is formed on the shoe body 21; the difference lies in the different connecting parts between the shoe body 22 and the shoe seat 21, and the different installation structures adapted to the connecting parts.

[0029] The connecting member in this embodiment includes a bolt 27 and a disc spring 28. The matching installation structure is that a step-type reducing hole penetrating the shoe seat body and the spherical protrusion is opened on the shoe seat 21, and a step-type reducing hole penetrating the shoe body and leading to the spherical groove is opened at a relative position on the shoe body 22. The bolt 27 is connected to the step-type reducing hole on the shoe seat 21 and the step-type reducing hole on the shoe body 22, and the disc spring 28 is sleeved on the bolt 27 and pressed on the reduced diameter of the step-type reducing hole on the shoe seat 21 through a gasket 26 and a nut 29, so as to realize a close-fitting movable connection between the shoe body 22 and the shoe seat 21. And when the spherical protrusion is close to the groove, a clearance gap that can accommodate the deflection of the shoe body is maintained between the opposite surfaces of the shoe body 22 and the shoe seat 21.

[0030] Example 4 See also Figure 2 The spherical protrusion and the groove in this embodiment are consistent with those in embodiment 2, and the connector and its mounting structure are the same as those in embodiment 3. That is, the spherical protrusion on the shoe seat 21 and the groove on the shoe body 22 in embodiment 3 are interchanged, and the connector still adopts the matching and mounting method of the bolt 27 and the disc spring 28 in embodiment 3, and the details are not repeated.

Claims

1. A brake shoe with attachment, characterized in that: It comprises a shoe seat and a shoe body arranged opposite to the shoe seat; an axial hole for passing the brake shoe pin is provided on the shoe seat, and a spherical protrusion protruding from the surface is provided in the middle of one side of the shoe seat opposite to the shoe body; the shoe body is a plate-like body, a friction plate is attached to its outer end surface, a groove is provided in the middle of its inner end surface, and the bottom surface of the groove is a spherical bottom that fits with the spherical protrusion on the shoe seat; the shoe seat and the shoe body are tightly connected by a connecting piece, and a clearance gap that can accommodate the deflection of the shoe body is maintained between the opposite surfaces of the two.

2. The brake shoe with add-on properties according to claim 1, characterized in that: The connecting piece is a permanent magnet block, which is embedded in a groove provided in a spherical protrusion of the shoe seat and fixed on the shoe seat by screws, so as to attract the shoe body to the shoe seat by strong magnetic attraction.

3. The brake shoe with attachment according to claim 1, characterized in that The shoe seat is provided with a reducing step hole that passes through the shoe seat body and the spherical protrusion, and a reducing step hole that passes through the shoe body and leads to the spherical groove is provided at a corresponding position on the shoe body; the connecting part includes a bolt and a disc spring, the bolt is passed through the reducing step hole on the shoe seat and the reducing step hole on the shoe body, the disc spring is sleeved on the bolt, and is crimped at the reducing position of one of the reducing step holes through a nut.

4. The brake shoe with attachment according to claim 1, characterized in that The shoe seat is penetrated with a limiting screw facing the shoe body, and the front end of the limiting screw is inserted into a limiting hole provided at a relative position of the shoe body, and the aperture of the limiting hole is larger than the outer diameter of the screw section of the limiting screw.

5. A brake shoe with attachment, characterized in that: It comprises a shoe seat and a shoe body arranged opposite to the shoe seat; the shoe body is a plate-shaped body, a friction plate is attached to its outer end surface, and a spherical protrusion protruding from the inner end surface is provided in the middle of the inner end surface; an axial hole for passing the brake shoe pin shaft is provided on the shoe seat, a groove is provided in the middle of one side of the shoe seat opposite to the shoe body, and the bottom of the groove is a spherical bottom that fits with the spherical protrusion on the shoe body; the shoe seat and the shoe body are closely connected by a connecting piece, and a clearance gap that can accommodate the deflection of the shoe body is maintained between the opposite surfaces of the two.

6. The brake shoe with add-on properties according to claim 5, characterized in that: The connecting piece is a permanent magnet block, which is embedded in a groove provided in a spherical protrusion of the shoe body and fixed on the shoe body by screws, so as to attract the shoe body to the shoe seat by strong magnetic attraction.

7. The brake shoe with attachment according to claim 5, characterized in that The shoe body is provided with a stepped diameter reducing hole that passes through the shoe body and the spherical protrusion, and a stepped diameter reducing hole that passes through the shoe body and leads to the spherical groove is provided at a corresponding position on the shoe seat; the connecting part includes a bolt and a disc spring, the bolt is passed through the stepped diameter reducing hole on the shoe seat and the stepped diameter reducing hole on the shoe body, the disc spring is sleeved on the bolt, and is crimped at the reduced diameter of one of the stepped diameter reducing holes through a nut.

8. The brake shoe with attachment according to claim 5, characterized in that The shoe seat is penetrated with a limiting screw facing the shoe body, and the front end of the limiting screw is inserted into a limiting hole provided at a relative position of the shoe body, and the aperture of the limiting hole is larger than the outer diameter of the screw section of the limiting screw.

Images