A hand-held coaxiality detection device for brake support

Abstract

The utility model discloses a kind of brake support hand-held coaxiality detection devices, including main body, the bottom of main body is fixedly connected with the positioning rod compatible with the measured support inner diameter, the bottom of one side of main body is equipped with mounting groove, the side slot of mounting groove is provided with the contact piece for being contacted with the sealing groove inner wall, the top of main body is connected with micrometer by detachable member, the measuring end of micrometer is contacted together with the top of contact piece by the conduction element being set in the inside of main body, the utility model is set by positioning rod and micrometer and conduction element and contact piece, positioning rod and support inner diameter compatible realization device stable positioning, avoid measuring reference deviation, contact piece and sealing groove inner wall reliable contact, and cooperate conduction element with contact information accurate transmission to micrometer, can accurately capture coaxiality fluctuation, compared with three coordinate measuring machine, without relying on special measuring needle, substantially shorten measurement preparation time, improve processing detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of handheld coaxiality testing device for brake brackets, specifically a handheld coaxiality testing device for brake brackets. Background Technology

[0002] Brake brackets are key structural components of the braking system, with the following main functions: load bearing and fixation: fixing brake calipers or brake shoes and other braking actuators, and stably mounting them on the axle or suspension to ensure the stability of the braking components during operation. The inner hole and sealing groove of the bracket are generally machined by milling. However, depending on the shape of the sealing groove, the cutting tools may include forming tools and standard inserts. Standard inserts have a short lifespan during machining. Tool wear and replacement can cause large fluctuations in the inner diameter, sealing groove diameter, and coaxiality.

[0003] When measuring the coaxiality of the sealing groove, a coordinate measuring machine is mostly used. The measurement time is long and the work efficiency is low. There are also special requirements for the shape and size of the probe, which affects the processing and inspection efficiency and increases the demand for special probes. Utility Model Content

[0004] The purpose of this invention is to provide a handheld coaxiality detection device for brake brackets to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A handheld coaxiality testing device for a brake bracket includes a main gauge body. A positioning rod adapted to the inner diameter of the bracket being measured is fixedly connected to the bottom of the main gauge body. A mounting groove is provided on one side of the bottom of the main gauge body. A contact element for contacting the inner wall of a sealing groove is provided on one side of the mounting groove. A dial indicator is detachably connected to the top of the main gauge body. The measuring end of the dial indicator contacts the top of the contact element through a conductive element located inside the main gauge body.

[0006] As a preferred technical solution, the detachable component includes a T-shaped tube inserted into the top of the main gauge body. The top of the main gauge body is provided with a fixing component for fixing the T-shaped tube. The small end of the T-shaped tube at the top is internally threaded with a clamping sleeve, and the dial indicator is installed in the clamping sleeve.

[0007] As a preferred technical solution, the fastener includes a fixing ring sleeved on the outer circumference of the T-shaped tube, and first bolts for connecting the main body are inserted into the top of both sides of the fixing ring.

[0008] As a preferred technical solution, the conductive member includes a measuring rod that slides vertically into the body of the main gauge, with the top of the measuring rod contacting the measuring end of the dial indicator and the bottom of the measuring rod located at the top of the contact member.

[0009] As a preferred technical solution, the main gauge body has a spring inside, the spring is sleeved on the surface of the measuring rod, and the spring is used to push the measuring rod downward.

[0010] As a preferred technical solution, the contact element includes a limiting pin disposed inside a groove on one side of the mounting groove, a measuring head rotatably connected to the surface of the limiting pin, a measuring end at the lower part of the measuring head, a measuring groove disposed on the top of one side of the positioning rod, the measuring end of the measuring head extending into the measuring groove, a ball bearing rollingly connected to the outer side of the measuring end of the measuring head, a contact end at the top of the measuring head, and the bottom of the measuring rod pressing against the contact end of the measuring head. The spring pushes the measuring rod downward, and the bottom of the measuring rod applies downward pressure to the top contact end of the measuring head, so that the measuring head rotates downward around the limiting pin. Therefore, the measuring end of the measuring head rotates outward out of the measuring groove, and the ball bearing connected to its end contacts the inner wall of the sealing groove.

[0011] As a preferred technical solution, a handle is fixedly connected to the top outer side of the measuring head, and the handle is tilted outward and extends to the outside of the mounting groove.

[0012] As a preferred technical solution, a rotating block is fitted on the outer circumferential surface of the T-shaped tube, and the rotating block is connected to the T-shaped tube by a second bolt.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves stable positioning of the device by setting up a positioning rod, a dial indicator, a transmission component, and a contact component. The positioning rod is adapted to the inner diameter of the bracket to avoid measurement benchmark deviation. The contact component makes reliable contact with the inner wall of the sealing groove and, together with the transmission component, accurately transmits the contact information to the dial indicator. It can accurately capture coaxiality fluctuations. Compared with a coordinate measuring machine, it does not rely on a special probe, greatly shortens the measurement preparation time, improves processing and inspection efficiency, and effectively copes with the measurement needs caused by processing fluctuations.

[0014] 2. This utility model features a detachable component. The T-shaped tube is inserted into the top of the main gauge body, and with the fastener, the T-shaped tube can be stably installed. Furthermore, the clamping sleeve inside the small end of the T-shaped tube cooperates with the dial indicator, which can not only reliably fix the dial indicator, but also facilitate the installation, removal, and position adjustment of the dial indicator, thereby improving the flexibility and stability of the dial indicator installation and adapting to the needs of different measurement scenarios.

[0015] 3. By incorporating a spring, the spring inside the main gauge body is fitted onto the surface of the measuring rod and pushes the measuring rod downwards. The spring force provides continuous and stable downward pressure to the measuring rod, ensuring that the measuring rod and the contact element always maintain reliable contact. This, in turn, ensures that the contact element can fit tightly against the inner wall of the sealing groove, avoiding measurement errors caused by poor contact and improving the stability and reliability of the measurement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a handheld coaxiality testing device for a brake bracket according to the present invention. Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a perspective structural diagram of the present invention.

[0017] In the picture: 1. Main gauge body; 2. Spring; 3. Measuring rod; 4. Handle; 5. Limit pin; 6. Measuring head; 7. Dial indicator; 8. Clamping sleeve; 9. Rotating block; 10. Fixing ring; 11. First bolt; 12. Second bolt; 13. Mounting groove; 14. Measuring groove; 15. Ball bearing; 16. Positioning rod; 17. T-tube. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 This embodiment provides a handheld coaxiality testing device for a brake bracket, including a main gauge body 1. A positioning rod 16 adapted to the inner diameter of the bracket being measured is fixedly connected to the bottom of the main gauge body 1. A mounting groove 13 is provided on one side of the bottom of the main gauge body 1. A contact element for contacting the inner wall of the sealing groove is provided on one side of the groove 13. A dial indicator 7 is connected to the top of the main gauge body 1 through a detachable component. The measuring end of the dial indicator 7 contacts the top of the contact element through a conductive component set inside the main gauge body 1. Through the positioning rod 16, the dial indicator 7, the conductive component, and the contact element, the positioning rod 16 is adapted to the inner diameter of the bracket to achieve stable positioning of the device, avoiding measurement reference deviation. The contact element reliably contacts the inner wall of the sealing groove and, together with the conductive component, accurately transmits the contact information to the dial indicator 7, which can accurately capture coaxiality fluctuations. Compared with a coordinate measuring machine, it does not rely on a special probe, greatly shortens the measurement preparation time, improves processing and inspection efficiency, and effectively copes with the measurement needs caused by processing fluctuations.

[0020] Among them, the dial indicator 7 is preferably a Mitutoyo 547 series digital depth indicator.

[0021] The detachable component includes a T-shaped tube 17 inserted into the top of the main gauge body 1. A fixing component for fixing the T-shaped tube 17 is provided on the top of the main gauge body 1. A clamping sleeve 8 is threaded inside the small end of the T-shaped tube 17. The dial indicator 7 is installed in the clamping sleeve 8. With the setting of the detachable component, the T-shaped tube 17 is inserted into the top of the main gauge body 1. With the fixing component, the T-shaped tube 17 can be stably installed. In addition, the clamping sleeve 8 inside the small end of the T-shaped tube 17 cooperates with the dial indicator 7 to reliably fix the dial indicator 7 and facilitate the installation, removal and position adjustment of the dial indicator 7, thereby improving the flexibility and stability of the installation of the dial indicator 7 and adapting to the needs of different measurement scenarios.

[0022] The fastener includes a fixing ring 10 fitted onto the outer circumference of the T-tube 17. The top of both sides of the fixing ring 10 is fitted with a first bolt 11 for connecting the main gauge body 1. Through the fastener, the fixing ring 10 fitted onto the outer circumference of the T-tube 17 and the first bolt 11 can firmly connect the T-tube 17 to the main gauge body 1, preventing the T-tube 17 from shaking or shifting during measurement and ensuring the measurement stability of the dial indicator 7. At the same time, the connection is achieved through the first bolt 11, making disassembly and assembly simple and facilitating the maintenance and adjustment of the T-tube 17 or the dial indicator 7 in the future.

[0023] The transmission component includes a measuring rod 3 that slides vertically and is inserted into the main gauge body 1. The top of the measuring rod 3 contacts the measuring end of the dial indicator 7, and the bottom of the measuring rod 3 is located at the top of the contact component. Through the setting of the transmission component, the measuring rod 3, which slides vertically, contacts the measuring end of the dial indicator 7 at its top and the top of the contact component at its bottom. This allows the force and displacement of the contact component to be accurately transmitted to the dial indicator 7, reducing the loss or deviation in the force and displacement transmission process, ensuring that the dial indicator 7 can accurately reflect the measurement information of the sealing groove, and improving the measurement accuracy.

[0024] The main gauge body 1 contains a spring 2 inside, which is sleeved on the surface of the measuring rod 3. The spring 2 is used to push the measuring rod 3 downward. Through the setting of the spring 2, the spring 2 inside the main gauge body 1 is sleeved on the surface of the measuring rod 3 and pushes the measuring rod 3 downward. The elastic force of the spring 2 can provide continuous and stable downward pressure to the measuring rod 3, ensuring that the measuring rod 3 and the contact part always maintain reliable contact. This ensures that the contact part can fit tightly with the inner wall of the sealing groove, avoiding measurement errors caused by poor contact and improving the stability and reliability of the measurement.

[0025] The contact element includes a limiting pin 5 located inside the groove on one side of the mounting groove 13. A measuring head 6 is rotatably connected to the surface of the limiting pin 5. The lower part of the measuring head 6 has a measuring end. A measuring groove 14 is provided on the top side of the positioning rod 16. The measuring end of the measuring head 6 extends into the measuring groove 14. A ball bearing 15 is rotatably connected to the outer side of the measuring end of the measuring head 6. The top of the measuring head 6 has a contact end. The bottom of the measuring rod 3 is pressed against the contact end of the measuring head 6. Spring 2 pushes the measuring rod 3 downward, and the bottom of the measuring rod 3 applies downward pressure to the top contact end of the measuring head 6, so that the measuring head 6 rotates downward around the limiting pin 5. Therefore, the measuring end of the measuring head 6 rotates outward out of the measuring groove 14, and the rolling ball 15 connected to its end contacts the inner wall of the sealing groove. Through the setting of the measuring head 6, the measuring head 6 can rotate flexibly around the limiting pin 5. With the drive of spring 2, the measuring end can be retracted and extended, which facilitates the quick loading and unloading of the device in the brake bracket where the inner diameter and sealing groove size change due to processing fluctuations. The contact between the ball 15 and the inner wall of the sealing groove reduces friction loss and avoids measurement deviation caused by rough processing surface, ensuring stable contact even when processing parameters fluctuate.

[0026] The measuring head 6 is fixedly connected to a handle 4 on its outer top. The handle 4 is tilted outward and extends to the outside of the mounting groove 13. The outward tilt of the handle 4 makes it easy for the operator to quickly press or release to control the retraction and release of the measuring end. For scenarios where the brake bracket sealing groove needs to be frequently inspected during processing, the device loading and unloading and measurement preparation time are greatly shortened, the measurement steps are simplified, the inspection frequency is increased, and the coaxiality fluctuation caused by tool wear and blade replacement can be detected in time, reducing the generation of defective products.

[0027] The outer circumference of the T-shaped tube 17 is fitted with a rotating block 9, which is connected to the T-shaped tube 17 by a second bolt 12. With the rotating block 9, the angles of the T-shaped tube 17 and the dial indicator 7 can be flexibly adjusted by the second bolt 12. The operator can quickly adjust the reading angle according to the actual placement position of the brake bracket after processing and the observation requirements, avoiding reading difficulties caused by workpiece position deviation. Compared with the cumbersome operation of adjusting the probe posture of the coordinate measuring machine, it improves the convenience and efficiency of reading, adapts to the diverse measurement environment in the workshop, and further meets the rapid detection needs under processing fluctuations.

[0028] Working principle; First, zero the dial indicator 7. During measurement, press down the handle 4 to drive the measuring head 6 to rotate upward at the limit pin 5, so that the measuring end of the measuring head 6 rotates inward into the measuring groove 14. At the same time, the contact end of the measuring head 6 pushes the measuring rod 3 upward and compresses the spring 2. Then, the positioning rod 16 is inserted into the inner hole of the bracket and the handle 4 is released. Under the action of the spring 2 inside the main gauge body 1, the measuring rod 3 is pushed downward, and its bottom applies downward pressure to the top contact end of the measuring head 6, causing the measuring head 6 to rotate downward around the limit pin 5, so that the measuring end of the lower part of the measuring head 6 rotates outward out of the measuring groove 14 of the positioning rod 16, and finally the ball 15 on the outside of the measuring end makes tight contact with the inner wall of the sealing groove. At this time, the reaction force of the inner wall of the sealing groove on the ball 15 will be transmitted to the measuring rod 3 through the measuring head 6, causing the measuring rod 3 to stop moving. This movement is transmitted to the measuring end of the dial indicator 7 through the measuring rod 3, and the dial indicator 7 then displays the corresponding measurement value, thereby realizing the measurement of the relevant parameters of the sealing groove.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A handheld coaxiality testing device for a brake bracket, characterized in that, The main gauge body (1) is fixedly connected to the bottom of the main gauge body (1) with a positioning rod (16) that is adapted to the inner diameter of the measuring bracket. A mounting groove (13) is provided on one side of the bottom of the main gauge body (1). A contact element for contacting the inner wall of the sealing groove is provided on one side of the mounting groove (13). A dial indicator (7) is connected to the top of the main gauge body (1) through a detachable part. The measuring end of the dial indicator (7) is in contact with the top of the contact element through a conductive part set inside the main gauge body (1).

2. The handheld coaxiality testing device for a brake bracket according to claim 1, characterized in that: The detachable component includes a T-shaped tube (17) inserted into the top of the main gauge body (1). The top of the main gauge body (1) is provided with a fixing component for fixing the T-shaped tube (17). The small end of the T-shaped tube (17) located at the top is internally threaded with a clamping sleeve (8). The dial indicator (7) is installed inside the clamping sleeve (8).

3. The handheld coaxiality testing device for a brake bracket according to claim 2, characterized in that: The fastener includes a fixing ring (10) sleeved on the outer circumference of the T-shaped tube (17), and the top of both sides of the fixing ring (10) are each inserted with a first bolt (11) for connecting the main gauge body (1).

4. The handheld coaxiality testing device for a brake bracket according to claim 1, characterized in that: The conductive element includes a measuring rod (3) that slides up and down inside the main gauge body (1). The top of the measuring rod (3) contacts the measuring end of the dial indicator (7), and the bottom of the measuring rod (3) is located at the top of the contact element.

5. The handheld coaxiality testing device for a brake bracket according to claim 4, characterized in that: The main gauge body (1) has a spring (2) inside, which is sleeved on the surface of the measuring rod (3) and is used to push the measuring rod (3) downward.

6. The handheld coaxiality testing device for a brake bracket according to claim 5, characterized in that: The contact element includes a limiting pin (5) disposed inside the groove on one side of the mounting groove (13). A measuring head (6) is rotatably connected to the surface of the limiting pin (5). The lower part of the measuring head (6) has a measuring end. A measuring groove (14) is provided on the top side of the positioning rod (16). The measuring end of the measuring head (6) extends into the measuring groove (14). A ball bearing (15) is rotatably connected to the outer side of the measuring end of the measuring head (6). The top of the measuring head (6) has a contact end. The bottom of the measuring rod (3) is pressed against the contact end of the measuring head (6). The spring (2) pushes the measuring rod (3) downward, and the bottom of the measuring rod (3) applies downward pressure to the top contact end of the measuring head (6), so that the measuring head (6) rotates downward around the limiting pin (5), and the measuring end of the measuring head (6) rotates outward out of the measuring groove (14), and the rolling ball (15) connected to its end contacts the inner wall of the sealing groove.

7. The handheld coaxiality testing device for a brake bracket according to claim 6, characterized in that: A handle (4) is fixedly connected to the top of the outer side of the measuring head (6), and the handle (4) is tilted outward and extends to the outside of the mounting groove (13).

8. A handheld coaxiality testing device for a brake bracket according to claim 3, characterized in that: The outer circumferential surface of the T-shaped tube (17) is fitted with a rotating block (9), and the rotating block (9) is connected to the T-shaped tube (17) by a second bolt (12).

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