Brake shoe detection device and detection method

Abstract

The present invention relates to the field of inspection tools, and in particular to a brake shoe inspection device and inspection method, comprising a base plate, a first support block, a second support block, a first support rod and a second support rod, after the first support rod and the second support rod are respectively inserted into the first axial hole and the second axial hole at both ends of the rib plate of the brake shoe, the first support rod is coaxial with the first axial hole, the second support rod is coaxial with the second axial hole, the height of the first support block H1 = R-l1-r1+h, and the height of the second support block H2 = R-l2-r2+h. The brake shoe is made to stand above the base plate by the first support block and the second support block, and the height requirements of the first support block and the second support block are met, so that after the brake shoe is placed on the first support block and the second support block, the radius of the outer arc surface of the shoe plate of the brake shoe is vertical, which is convenient for the measuring ruler to measure and inspect the radius and parallelism of the brake shoe. The present invention has reasonable design and is easy to operate, and can quickly and accurately inspect the brake shoe to improve product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection tools, and in particular to a brake shoe inspection device and inspection method. Background Art

[0002] The brake shoe is a key component of the drum brake. Its main function is to withstand the thrust of the actuator, the normal force and tangential force of the brake drum, and the supporting reaction force during the braking process. The friction with the brake drum slows down the speed of the vehicle and realizes the braking function of the vehicle.

[0003] The brake shoe includes a shoe plate and a rib plate. The brake shoe produced by casting requires multiple processing steps, including milling the outer arc surface of the shoe plate and processing the axial holes at both ends of the rib plate. After the brake shoe is processed, it needs to be inspected. The existing brake shoe inspection usually adopts three-coordinate measurement. The three-coordinate measurement equipment has high cost, long inspection time for a single product, low inspection efficiency, and is not suitable for batch inspection of products. Summary of the invention

[0004] The purpose of the present invention is to provide a brake shoe detection device and a detection method to address the deficiencies of the prior art, which have a simple structure and are easy to operate, and are conducive to rapid and accurate detection of the brake shoe, thereby improving product quality.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a brake shoe detection device, including a base plate, a first support block, a second support block, a first support rod and a second support rod, the first support block and the second support block are located above the base plate, after the first support rod and the second support rod are respectively inserted into the first axial hole and the second axial hole at both ends of the rib plate of the brake shoe, the first support rod is coaxial with the first axial hole, the second support rod is coaxial with the second axial hole, and the two ends of the first support rod are overlapped above the first support block, and the two ends of the second support rod are overlapped above the second support block, the height H1 of the first support block = the radius R of the outer arc surface of the shoe plate of the brake shoe-the distance l1 between the highest point of the outer arc of the shoe plate of the brake shoe and the axis of the first axial hole-the radius r1+h of the first axial hole, the height H2 of the second support block = the radius R of the outer arc surface of the shoe plate of the brake shoe-the distance l2 between the highest point of the outer arc surface of the shoe plate of the brake shoe and the axis of the second axial hole-the radius r2+h of the second axial hole, h≥0mm or h is a negative value, and H1 and H2 are not less than 0.

[0006] Furthermore, h=0.

[0007] Furthermore, the first support block and the second support block are provided with grooves at both ends of the rib plate for accommodating the brake shoe.

[0008] Furthermore, the first support rod and the second support rod are cylindrical rods.

[0009] Furthermore, the upper surfaces of the first supporting block and the second supporting block are parallel to the upper surface of the bottom plate.

[0010] Furthermore, the width of the bottom plate is greater than the width of the shoe of the brake shoe to be tested.

[0011] On the other hand, a method for detecting a brake shoe comprises the following steps:

[0012] The first support rod and the second support rod pass through the axial holes at both ends of the rib plate of the brake shoe, and the two ends of the first support rod and the second support rod are respectively overlapped on the first support block and the second support block, so that the brake shoe stands on the first support block and the second support block through the first support rod and the second support rod;

[0013] When measuring, the measuring ruler uses the upper surface of the base plate as the measuring reference surface, and the bottom of the caliper of the measuring ruler contacts the outer arc surface of the highest point of the brake shoe to detect the radius of the outer arc surface of the brake shoe, and to detect whether the parallelism between the outer arc surface of the brake shoe and the axes of the axial holes at both ends of the rib plate meets the requirements.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention enables the brake shoe to stand above the bottom plate through the first support block and the second support block, and sets the height of the first support block and the second support block, so that after the brake shoe is placed above the first support block and the second support block through the first support rod and the second support rod, the center of the outer arc surface of the shoe plate of the brake shoe is located directly below the highest point, that is, the radius of the highest point of the outer arc surface is vertical, so that it is convenient to measure and detect whether the radius of the outer arc surface of the shoe plate of the machined brake shoe meets the requirements through a measuring ruler, and to detect the parallelism of the outer arc surface of the shoe plate of the brake shoe and the axial holes at both ends of the rib plate;

[0016] 2. In the present invention, after the first support rod and the second support rod are respectively inserted into the axial holes at both ends of the rib plate of the brake shoe, they are matched with the axial hole gap, so that the first support rod and the second support rod are coaxial with the axial holes at both ends of the rib plate, so that after the two ends of the first support rod and the second support rod are overlapped to the top of the first support block and the second support block, the distance from the central axis of the first support rod to the upper surface of the first support block is the hole radius of the first axial hole at one end of the rib plate, and the distance from the central axis of the second support rod to the upper surface of the second support block is the hole radius of the second axial hole at the other end of the rib plate, which is conducive to detecting the radius of the outer arc surface of the shoe plate of the brake shoe;

[0017] 3. The detection device of the present invention has a simple structure and can quickly and accurately detect the radius of the outer arc surface of the brake shoe plate, as well as the parallelism between the axial holes at both ends of the brake shoe rib plate and the outer arc surface of the shoe plate, which is beneficial to ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention after the brake shoe is fixed.

[0019] Figure 2 It is a structural schematic diagram of the present invention.

[0020] Figure 3 yes Figure 2 Top view of the .

[0021] Description of reference numerals:

[0022] 1——base plate, 2——first support block, 3——second support block, 4——first support rod, 5——second support rod, 6——brake shoe, 61——rib plate, 611——first axial hole, 612——second axial hole, 62——shoe, R——radius of the outer arc surface of the brake shoe, r1——radius of the first axial hole, r2——radius of the second axial hole, H1——height of the first support block, H2——height of the second support block, l1——distance between the highest point of the outer arc surface of the brake shoe and the axis of the first axial hole, l2——distance between the highest point of the outer arc surface of the brake shoe and the axis of the first axial hole. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0024] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, a brake shoe detection device of the present embodiment includes a base plate 1, a first support block 2, a second support block 3, a first support rod 4 and a second support rod 5. The upper surface of the base plate 1 is flat and smooth. The first support block 2 and the second support block 3 are located above the base plate 1. After the first support rod 4 and the second support rod 5 are respectively inserted into the first axial hole 611 and the second axial hole 612 at both ends of the rib plate 61 of the brake shoe 6, the first support rod 4 is coaxial with the first axial hole 611, and the second support rod 5 is coaxial with the second axial hole 612, that is, the first support rod 4 and the second support rod 5 are respectively matched with the axial hole gaps at both ends of the rib plate 61 of the brake shoe 6, and the two ends of the first support rod 4 are overlapped above the first support block 2. , both ends of the second support rod 5 are overlapped above the second support block 3, the height H1 of the first support block 2 = the radius R of the outer arc surface of the brake shoe's shoe plate 62-the distance between the highest point of the outer arc of the brake shoe's shoe plate 62 and the axis of the first axial hole 611 l1-the radius r1+h of the first axial hole 611, the height H2 of the second support block 3 = the radius R of the outer arc surface of the brake shoe's shoe plate 62-the distance between the highest point of the outer arc surface of the brake shoe's shoe plate 62 and the axis of the second axial hole 612 l2-the radius r2+h of the second axial hole 612, after the brake shoe 6 is placed above the first support block 2 and the second support block 3 through the first support rod 4 and the second support rod 5, it passes through the radius of the highest point of the outer arc surface of the brake shoe's shoe plate 62 vertically. Preferably, h ≥ 0 mm or h is a negative value, and H1 and H2 are not less than 0, that is, the upper surfaces of the first support block 2 and the second support block 3 are located above the upper surface of the base plate 1, wherein R, the distance between the highest point of the outer arc surface of the brake shoe 6 and the axial holes at both ends, and the first axial hole 611r1 and the second axial hole 612r2 are known, which are the size requirements of the brake shoe, and different models of brake shoes have different size parameters.

[0027] h=0, that is, when h=0, after the brake shoe 6 is placed above the first support block 2 and the second support block 3 through the first support rod 4 and the second support rod 5, the center of the outer arc of the shoe plate 62 of the brake shoe 6 falls within the plane where the upper surface of the base plate 1 is located. During detection, the base of the measuring ruler is placed on the upper surface of the base plate 1, and the radius of the outer arc surface of the shoe plate 62 of the brake shoe 6 is detected with the detection reference of the upper surface of the base plate 1. The detection is convenient, fast and accurate.

[0028] The first support block 2 and the second support block 3 are provided with grooves at both ends of the rib plate 61 for accommodating the brake shoe 6, and the length direction of the groove is consistent with the length direction of the rib plate 61 of the brake shoe 6. The length of the first support rod 4 and the second support rod 5 is greater than the width of the groove, so that the two ends of the first support rod 4 and the second support rod 5 can be overlapped on the upper surfaces of the first support block 2 and the second support block 3 respectively, thereby supporting the brake shoe 6.

[0029] The first support rod 4 and the second support rod 5 are cylindrical rods. After the first support rod 4 and the second support rod 5 are respectively inserted into the axial holes at both ends of the rib plate 61 of the brake shoe 6, the first support rod 4 and the second support rod 5 are respectively coaxial with the first axial hole 611 and the second axial hole 612. Therefore, when the two ends of the first support rod 4 and the second support rod 5 are respectively overlapped with the upper surfaces of the first support block 2 and the second support block 3, the lowest point of the first axial hole 611 of the rib plate 61 of the brake shoe 6 is located in the plane where the upper surface of the first support block 2 is located, and the lowest point of the second axial hole 612 is located in the plane where the upper surface of the second support block 3 is located, thereby ensuring the accuracy of the measuring ruler in measuring the outer arc radius of the shoe plate 62 of the brake shoe 6.

[0030] The upper surfaces of the first support block 2 and the second support block 3 are parallel to the upper surface of the base plate 1. After the brake shoe 6 is supported and erected above the first support block 2 and the second support block 3 by the first support rod 4 and the second support rod 5, the measuring ruler takes the upper surface of the base plate 1 as the measurement reference, and the parallelism of the outer arc surface of the shoe plate 62 of the brake shoe 6 and the axial holes at both ends of the rib plate 61 can be quickly and accurately determined.

[0031] Furthermore, the width of the bottom plate 1 is greater than the width of the shoe plate 62 of the brake shoe to be tested, so that a measuring ruler is placed above the bottom plate 1 and the shoe plate radius of the outer arc surface of the shoe plate 62 of the brake shoe is tested with the upper surface of the bottom plate 1 as the reference plane.

[0032] A method for detecting a brake shoe comprises the following steps:

[0033] The first support rod 4 and the second support rod 5 pass through the axial holes at both ends of the rib plate 61 of the brake shoe 6, and both ends of the first support rod 4 and the second support rod 5 are overlapped above the first support block 2 and the second support block 3 respectively, so that the brake shoe 6 stands above the first support block 2 and the second support block 3 through the first support rod 4 and the second support rod 5;

[0034] During measurement, the measuring ruler uses the upper surface of the base plate 1 as the measuring reference surface, that is, the base of the measuring ruler is placed on the base plate 1, and the measuring ruler includes a base, a scale and a caliper. The scale is vertically above the base, the caliper is slidably connected to the scale, and the bottom of the caliper is horizontal. The bottom of the caliper of the measuring ruler contacts the outer arc surface of the highest point of the shoe plate 62 of the brake shoe 6 to measure and detect the radius of the outer arc surface of the shoe plate 62, and detect the parallelism of the outer arc surface of the shoe plate 62 of the brake shoe 6 with the axis of the shaft hole. Since the first support block 2 and the second support block 3 are parallel to the upper surface of the base plate 1, and the first support rod 4 and the second support rod 5 are respectively parallel to the first shaft hole 611 and the second shaft hole 612 at both ends of the rib plate 61 of the brake shoe 6, when the measuring ruler uses the upper surface of the base plate 1 as the measuring reference surface, the parallelism of the outer arc surface of the shoe plate 62 of the brake shoe 6 with the shaft holes at both ends of the rib plate 61 can be determined. When the bottom of the caliper of the measuring ruler is in contact with the outer circle of the shoe plate 62 When the straight line formed by the highest point of the arc surface contacts, the axis of the outer arc surface is parallel to the axis of the axial holes at both ends of the rib plate 61 of the brake shoe 6, and the axis of the axial holes at both ends of the rib plate 61 of the brake shoe 6 is parallel to the outer arc surface of the shoe plate 62 of the brake shoe 6; and the radius of the outer arc surface of the shoe plate 62 is measured by measuring the height of the highest point of the outer arc surface of the shoe plate 62 of the brake shoe 6 from the upper surface of the bottom plate 1. When h=0, the height of the highest point of the outer arc surface of the shoe plate 62 measured by the measuring ruler is the radius of the outer arc surface, and the measured value is compared with the standard size of the brake shoe 6 to determine whether the processing of the outer arc surface of the shoe plate 62 of the brake shoe 6 meets the requirements. When h≠0, the distance from the highest point of the outer arc surface of the shoe plate 62 measured by the measuring ruler to the surface of the bottom plate 1 is calculated by the equivalent relationship of h to obtain the radius of the outer arc surface. Preferably, h=0 can intuitively and accurately detect the size of the outer arc surface, reduce errors, and ensure measurement accuracy.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A brake shoe detection device, characterized in that: The invention comprises a base plate (1), a first support block (2), a second support block (3), a first support rod (4) and a second support rod (5), wherein the first support block (2) and the second support block (3) are located above the base plate (1), the first support block (2) and the second support block (3) are provided with grooves at both ends of a rib plate (61) for accommodating a brake shoe (6), the upper surfaces of the first support block (2) and the second support block (3) are parallel to the upper surface of the base plate (1), the first support rod (4) and the second support rod (5) are cylindrical rods, and after the first support rod (4) and the second support rod (5) are respectively inserted into the first axial hole (611) and the second axial hole (612) at both ends of the rib plate (61) of the brake shoe (6), the first support rod (4) is coaxial with the first axial hole (611), the second support rod (5) is coaxial with the second axial hole (612), and the first support rod ( The two ends of the second support rod (4) are overlapped on the top of the first support block (2), and the two ends of the second support rod (5) are overlapped on the top of the second support block (3), the height H1 of the first support block (2) = the radius R of the outer arc surface of the shoe plate of the brake shoe-the distance between the highest point of the outer arc of the shoe plate of the brake shoe and the surface passing through the axis of the first axial hole and parallel to the upper surface of the bottom plate l1-the radius of the first axial hole r1+h, the height H2 of the second support block (3) = the radius R of the outer arc surface of the shoe plate of the brake shoe-the distance between the highest point of the outer arc surface of the shoe plate of the brake shoe and the surface passing through the axis of the second axial hole and parallel to the upper surface of the bottom plate l2-the radius of the second axial hole r2+h, h=0, and H1 and H2 are not less than 0; taking the upper surface of the bottom plate (1) as the measurement reference surface, the height of the highest point of the outer arc surface of the shoe plate (62) of the brake shoe (6) from the upper surface of the bottom plate (1) is measured to measure the radius of the outer arc surface of the shoe plate (62).

2. A brake shoe detection device according to claim 1, characterized in that: The width of the bottom plate (1) is greater than the width of the shoe plate (62) of the brake shoe to be tested.

3. A detection method using a brake shoe detection device according to any one of claims 1 to 2, characterized in that: The first support rod (4) and the second support rod (5) pass through the axial holes at both ends of the rib plate (61) of the brake shoe (6), and the first support rod (4) and the second support rod (5) are respectively overlapped above the first support block (2) and the second support block (3), so that the brake shoe (6) stands above the first support block (2) and the second support block (3) through the first support rod (4) and the second support rod (5); During measurement, the measuring ruler uses the upper surface of the bottom plate (1) as the measuring reference surface, and the caliper bottom of the measuring ruler contacts the outer arc surface of the highest point of the shoe plate (62) of the brake shoe (6) to detect the radius of the outer arc surface of the shoe plate (62) and to detect whether the parallelism of the outer arc surface of the shoe plate (62) of the brake shoe (6) and the axes of the shaft holes at both ends of the rib plate (61) meet the requirements.

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