Brake drum detection device

Abstract

The utility model discloses a brake drum detection device, and relates to the technical field of brake drums, the brake drum detection device comprises a detection table, a support, a hanging bracket, a dial indicator and a protection head, the detection table is used for clamping and fixing a to-be-detected brake drum, the support is arranged on one side of the detection table, the hanging bracket is slidably arranged along the support, and the dial indicator is arranged on the support. The lifting frame can rotate around the axis of the to-be-measured brake drum, the lifting frame is provided with an adjusting piece capable of performing bidirectional telescoping along the radial direction of the to-be-measured brake drum, the dial indicators are arranged at two ends of the adjusting piece, and the protective heads are arranged at one ends of measuring heads of the dial indicators. And the protection head is in contact with the inner wall of the brake drum to be tested. By converting the roundness into the diameter variable quantity, roundness detection of different positions in the axis extension direction of the brake drum can be achieved, operation and use are convenient, the detection efficiency is improved, the protection head replaces the measuring head of the dial indicator to make contact with the brake drum, and abrasion of the measuring head of the dial indicator can be avoided.

Description

Technical Field

[0001] This application relates to the field of brake drum technology, specifically to a brake drum testing device. Background Technology

[0002] Currently, brake drum braking is one of the most important applications in the automotive braking field, and it has been widely used due to its simple structure and low cost. However, its structural characteristics make the brake surface prone to deformation during processing (changes in the roundness of the brake surface). The most effective inspection tool for brake surface deformation is the coordinate measuring machine (CMM). However, CMM inspection is time-consuming, inefficient, and cannot be used for batch product inspection. Therefore, there is an urgent need to find a simple and fast inspection tool for brake drum roundness. Utility Model Content

[0003] The main objective of this application is to provide a brake drum detection device, which aims to solve the above-mentioned technical problems.

[0004] The technical solution adopted in this application is as follows:

[0005] A brake drum detection device, comprising:

[0006] A testing table, used for clamping and fixing the brake drum to be tested;

[0007] A support bracket is disposed on one side of the testing station;

[0008] A hanger is slidably disposed along the bracket and is rotatable about the axis of the brake drum to be tested. The hanger is provided with an adjusting member that can extend and retract bidirectionally along the radial direction of the brake drum to be tested.

[0009] A dial indicator, wherein the dial indicator is disposed at both ends of the adjusting member;

[0010] A protective head is provided at one end of the measuring head of the dial indicator, and the protective head is in contact with the inner wall of the brake drum to be tested.

[0011] Optionally, the testing platform is provided with an inner cavity for placing the brake drum to be tested, and the testing platform is provided with a stop rod that can move radially along the testing platform. A stop plate is provided on the center side of the stop rod, and a spring is sleeved on the stop rod to abut against the stop plate and the inner wall of the testing platform.

[0012] Optionally, a tapered positioning boss is provided at the center of the inner cavity.

[0013] Optionally, the surface of the abutment plate is provided with a soft pad layer, and the side of the soft pad layer that is in contact with the brake drum to be tested is provided with anti-slip texture.

[0014] Optionally, the hanger includes:

[0015] A crossbeam, one end of which is provided with a sliding sleeve that cooperates with the bracket, and the other end of which is provided with a rotary motor;

[0016] A U-shaped frame is fixed to the output end of the rotary motor, and mounting holes for installing adjustment components are provided on both sides of the U-shaped frame.

[0017] Optionally, the adjusting element includes:

[0018] A threaded sleeve is positioned in the center, and the threaded sleeve has internal threads in opposite directions arranged symmetrically on both sides of its center.

[0019] A pair of telescopic rods are symmetrically mounted on both ends of the threaded sleeve, and the telescopic rods pass through the mounting holes and are restricted from rotation.

[0020] Optionally, the mounting hole is a cross-shaped hole, and the telescopic rod mates with the cross-shaped hole.

[0021] Optionally, a support frame is provided at the end of the telescopic rod away from the threaded sleeve, and the support frame is provided with a side hole for fixing the dial indicator, and the dial indicator is locked in the side hole by a screw.

[0022] Optionally, the protective head includes:

[0023] A fixing sleeve is fitted onto one end of the measuring head of the dial indicator, and the fixing sleeve abuts against the measuring head of the dial indicator;

[0024] A roller is rotatably mounted on the fixed sleeve, and the roller is in contact with the inner wall of the brake drum to be tested.

[0025] Optionally, the fixing sleeve and the dial indicator are secured together by screws.

[0026] Compared with the prior art, the beneficial effects of this application are:

[0027] This application discloses a brake drum testing device, comprising a testing platform, a bracket, a hanger, a dial indicator, and protective heads. The brake drum is clamped and fixed to the testing platform, the hanger is adjusted to a suitable position, and the protective heads on both sides are positioned against the cylindrical surface of the brake drum to be tested via an adjusting mechanism. The hanger is rotated, and the deviation of the dial indicator's swing is read. This invention converts roundness into a change in diameter, enabling roundness testing at different positions along the brake drum's axial direction. The structure is simple, easy to operate, improves testing efficiency, significantly reduces costs, and avoids wear on the dial indicator's measuring head by replacing the dial indicator's measuring head in contact with the brake drum. Attached Figure Description

[0028] Figure 1 A schematic diagram of the brake drum detection device provided in an embodiment of this application from one perspective;

[0029] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0030] Figure 3 for Figure 1 The cross section in the BB direction.

[0031] Explanation of the labels in the attached drawings:

[0032] 1-Testing table, 101-Abutting rod, 102-Abutting plate, 103-Spring, 2-Bracket, 201-Spring round head pin, 3-Hanger, 301-Crossbeam, 302-U-shaped frame, 303-Sliding sleeve, 4-Rotating motor, 5-Telescopic component, 501-Threaded sleeve, 502-Telescopic rod, 6-Upright plate, 7-Dial indicator, 8-Protective head, 801-Fixing sleeve, 802-Roller, 9-Brake drum to be tested. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0037] See attached document Figure 1 This application provides a brake drum testing device, including a testing platform 1, a bracket 2, a hanger 3, a dial indicator 7, and a protective head 8. The testing platform 1 is used to clamp and fix the brake drum 9 to be tested. The bracket 2 is disposed on one side of the testing platform 1. The hanger 3 is slidably disposed along the bracket 2 and can rotate around the axis of the brake drum 9 to be tested. The hanger 3 is provided with an adjusting member that can extend and retract bidirectionally along the radial direction of the brake drum 9 to be tested. The dial indicator 7 is disposed at both ends of the adjusting member. The protective head 8 is disposed at one end of the measuring head of the dial indicator 7. The extension and retraction of the adjusting member allows the protective head 8 to contact the inner wall of the brake drum 9 to be tested during testing.

[0038] As can be imagined, during testing, the brake drum is clamped and fixed to the testing table 1, the hanger 3 is adjusted to a suitable position, and the protective heads 8 on both sides are made to abut against the cylindrical surface of the brake drum to be tested by adjusting the hanger 3. The swing deviation of the dial indicator 7 is then read by rotating the hanger 3. This utility model converts roundness into a change in diameter, enabling roundness testing at different positions along the extension direction of the brake drum axis. The structure is simple, easy to operate, improves testing efficiency, and greatly reduces costs. Furthermore, by using the protective heads 8 instead of the measuring head of the dial indicator 7 to contact the brake drum, wear on the measuring head of the dial indicator 7 can be avoided.

[0039] In this embodiment, as Figure 1As shown, the testing platform 1 is a cuboid platform with an inner cavity for placing the brake drum 9 to be tested. Through holes are arranged around the inner cavity, and a stop rod 101, capable of moving radially along the testing platform 1, is installed within each through hole. A stop plate 102 is positioned on the side of the stop rod 101 at the center of the inner cavity. A spring 103 is fitted onto the stop rod 101, abutting against the stop plate 102 and the inner wall of the testing platform 1. During testing, when the brake drum 9 to be tested is placed into the inner cavity, the spring 103 is compressed, causing the stop plate 102 to exert pressure on the brake drum 9, thus clamping it. It is easy to imagine that, since the outer diameter of the brake drum is the same at the same position, when force balance is achieved, the change in the spring 103 is the same, thus automatically clamping the brake drum at the center of the inner cavity and preventing it from shifting. Of course, in order to prevent the brake drum from rotating during the test, a soft pad is attached to the side of the backing plate 102 facing the brake drum. The side of the soft pad that is in contact with the brake drum 9 to be tested is provided with anti-slip texture, which can not only prevent scratches on the outer wall of the brake drum, but also increase the friction between the soft pad and the brake drum.

[0040] In addition, such as Figure 1 As shown, a tapered positioning boss is provided at the center of the inner cavity of the testing table 1. The tapered positioning boss cooperates with the central bearing hole of the brake drum to achieve the effect of rapid coarse positioning.

[0041] Furthermore, such as Figure 1 As shown, the hanger 3 includes a crossbeam 301 and a U-shaped frame 302. One end of the crossbeam 301 is provided with a sliding sleeve 303 that cooperates with the bracket 2. The bracket 2 is provided with a number of round-headed pins of springs 103 spaced longitudinally. Correspondingly, a number of round-headed pin holes are provided on the inner wall of the sliding sleeve 303. The crossbeam 301 can slide along the bracket 2 through the sliding sleeve 303 to cooperate with different round-headed pins of springs 103, thereby adjusting the height of the hanger 3 and realizing the roundness detection at different positions in the extension direction of the brake drum axis. The other end of the crossbeam 301 is integrally formed with a motor mounting bracket. A rotary motor 4 is fixedly mounted on the motor mounting bracket. The U-shaped frame 302 is fixed to the output end of the rotary motor 4. Mounting holes for mounting adjustment components are provided on both sides of the U-shaped frame 302. Dial gauges 7 are provided at both ends of the adjustment components. Thus, by rotating the U-shaped frame 302 driven by the rotary motor 4, the dial gauges 7 can complete the radial dimension measurement of the brake drum.

[0042] In the above description, the adjusting component includes a threaded sleeve 501 and a telescopic rod 502. The threaded sleeve 501 is centrally located inside the U-shaped frame 302, and the threaded sleeve 501 has symmetrical internal threads in opposite directions around its center. A telescopic rod 502 is threadedly fitted at each end of the threaded sleeve 501, and the telescopic rod 502 extends from the mounting hole to the outside of the U-shaped frame 302 to connect to a dial indicator 7. Wherein, as Figure 3As shown, the mounting hole is a cross hole. The telescopic rod 502 cooperates with the cross hole to form a rotation limit, so that the telescopic rods 502 on both sides can be adjusted to extend or retract by rotating the threaded sleeve 501.

[0043] In one embodiment, to fix the dial indicator 7 to the adjusting member, such as... Figure 1 As shown, a support frame is provided at the end of the telescopic rod 502 away from the threaded sleeve 501. The support frame is provided with a side hole for fixing the dial indicator 7. The dial indicator 7 is locked in the side hole by screws to complete the installation.

[0044] In this embodiment, as Figure 2 As shown, the protective head 8 includes a fixing sleeve 801 and a roller 802. The fixing sleeve 801 is fitted onto one end of the measuring head of the dial indicator 7, and the fixing sleeve 801 and the dial indicator 7 are fixed together by screws, keeping the fixing sleeve 801 in contact with the measuring head of the dial indicator 7. Thus, it can be imagined that the movement of the fixing sleeve 801 can cause the measuring head to move, thereby completing the measurement. In order to avoid scratching the inner wall of the brake drum 9 under test during the test, a wheel frame is provided at the end of the fixing sleeve 801 away from the dial indicator 7. The roller 802 is rotatably mounted on the wheel frame via a shaft. During the test, the roller 802 is adjusted by an adjusting component to make it fit against the inner wall of the brake drum 9 under test.

[0045] In summary, the brake drum detection device provided in this application is used as follows:

[0046] First, the brake drum 9 to be tested is clamped and fixed on the test bench 1;

[0047] Next, adjust the height of the hanger 3 so that the dial indicator 7 enters the inside of the brake drum 9 to be tested;

[0048] Then, the telescopic rod 502 is adjusted to extend to both sides by adjusting the adjustment component, so that the roller 802 contacts the inner wall of the brake drum 9 to be tested;

[0049] Finally, the U-shaped frame 302 is rotated by the rotary motor 4, and the reading of the dial indicator 7 is observed to determine whether the roundness of the brake drum 9 under test meets the requirements.

[0050] Of course, the roundness of the brake drum 9 under test can be checked at different positions by moving the hanger 3 to different heights.

[0051] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A brake drum detection device, characterized in that, include: A testing table, used for clamping and fixing the brake drum to be tested; A support bracket is disposed on one side of the testing station; A hanger is slidably disposed along the bracket and is rotatable about the axis of the brake drum to be tested. The hanger is provided with an adjusting member that can extend and retract bidirectionally along the radial direction of the brake drum to be tested. A dial indicator, wherein the dial indicator is disposed at both ends of the adjusting member; A protective head is provided at one end of the measuring head of the dial indicator, and the protective head is in contact with the inner wall of the brake drum to be tested.

2. The brake drum detection device according to claim 1, characterized in that, The testing platform is provided with an inner cavity for placing the brake drum to be tested. The testing platform is provided with a stop rod that can move radially along the testing platform. A stop plate is provided on the center side of the stop rod. A spring is sleeved on the stop rod to abut against the stop plate and the inner wall of the testing platform.

3. The brake drum detection device according to claim 2, characterized in that, A tapered positioning boss is provided at the center of the inner cavity.

4. The brake drum detection device according to claim 2, characterized in that, The surface of the abutment plate is provided with a soft pad layer, and the side of the soft pad layer that is in contact with the brake drum to be tested is provided with anti-slip texture.

5. The brake drum detection device according to claim 1, characterized in that, The hanger includes: A crossbeam, one end of which is provided with a sliding sleeve that cooperates with the bracket, and the other end of which is provided with a rotary motor; A U-shaped frame is fixed to the output end of the rotary motor, and mounting holes for installing adjustment components are provided on both sides of the U-shaped frame.

6. The brake drum detection device according to claim 5, characterized in that, The adjusting element includes: A threaded sleeve is positioned in the center, and the threaded sleeve has internal threads in opposite directions arranged symmetrically on both sides of its center. A pair of telescopic rods are symmetrically mounted on both ends of the threaded sleeve, and the telescopic rods pass through the mounting holes and are restricted from rotation.

7. The brake drum detection device according to claim 6, characterized in that, The mounting hole is a cross-shaped hole, and the telescopic rod mates with the cross-shaped hole.

8. The brake drum detection device according to claim 6 or 7, characterized in that, The telescopic rod is provided with a stand at one end away from the threaded sleeve. The stand is provided with a side hole for fixing the dial indicator. The dial indicator is locked in the side hole by a screw.

9. The brake drum detection device according to claim 1, characterized in that, The protective head includes: A fixing sleeve is fitted onto one end of the measuring head of the dial indicator, and the fixing sleeve abuts against the measuring head of the dial indicator; A roller is rotatably mounted on the fixed sleeve, and the roller is in contact with the inner wall of the brake drum to be tested.

10. The brake drum detection device according to claim 9, characterized in that, The fixing sleeve and the dial indicator are fastened together by screws.

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