Device for detecting axial run-out degree of end face of threaded hole of automotive brake

Abstract

An automobile brake threaded hole end face axial run-out degree detection device belongs to the technical field of detection equipment and comprises a digital display dial indicator body, an upper fixing seat, an adjusting disc, a connecting pipe and a detection pipe. The upper fixing seat is provided with a detection hole, the digital dial indicator body is fixedly installed at the upper end of the upper fixing seat, the upper end of the connecting pipe is fixedly installed at the lower end of the upper fixing seat, the outer side of the lower end of the connecting pipe is provided with external threads, the detection pipe movably sleeves the outer side of the connecting pipe, and the adjusting disc is fixedly installed on the outer side of the middle of the detection pipe. One side of the lower end of the detection tube is provided with a contact seat. According to the utility model, after a detector rotates the adjusting disc, when the upper part of the end surface of the threaded seat is uneven, the detection tube enables the probe rod of the digital display dial indicator body to move up and down through the adjusting disc, and the detector can detect the digital display dial indicator body by observing the digital change displayed by the digital display dial indicator body. Whether the axial runout of the end face of the internal thread seat is unqualified or not can be intuitively known, so that convenience is brought to detection personnel, and the detection efficiency is correspondingly improved.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a device for detecting the axial runout of the end face of a threaded hole in an automobile brake. Background Technology

[0002] The automotive brake is a crucial safety component in a vehicle. When it operates, the driver depresses the brake pedal, and hydraulic oil enters through the inlet. The brake piston then pushes the brake pads to clamp the brake disc, bringing the wheels to a stop. The inlet and return ports of the automotive brake are located on opposite sides of the upper end of its housing. The inlet port is connected to the hydraulic pump's outlet pipe via a pipeline, and the return port is connected to the hydraulic pump's return pipe via a pipeline. In practice, the inlet and return ports on the upper end of the brake housing have internal threads to connect to the externally threaded outlet and return pipe connectors. At the upper end of the internal thread, there is a concave annular threaded seat end face with an outer diameter larger than the internal thread and the outer diameter of the sealing ring at the lower end of the outlet and return pipe connectors. After the outlet and return pipe connectors are screwed into the upper ends of the inlet and return ports, the upper sealing ring of the outlet and return pipe connectors and the upper side of the concave annular threaded seat end face make sealing contact, ensuring the inflow and outflow of hydraulic oil.

[0003] In practical applications, when the upper side of the concave annular threaded seat end face is not flat due to various reasons, meaning that the upper side of the threaded seat end face does not fit properly with the lower end of the sealing ring of the oil outlet and return pipe joints, there may be a gap between the lower end of the oil outlet and return pipe joints and the upper side of the threaded seat end face after the oil outlet and return pipe joints are installed. This could potentially lead to oil leakage from the automotive brake's oil outlet and return pipe joints due to poor sealing, thus compromising the brake's braking performance. Currently, the axial runout of the threaded seat end face is typically measured by a digital dial indicator. During this measurement, the operator needs to continuously and sequentially adjust the lower end of the digital dial indicator's probe to different positions on the upper part of the threaded seat end face to measure the axial runout at various locations. This method is inconvenient for operators and hinders work efficiency. Utility Model Content

[0004] To overcome the shortcomings of existing methods for testing the flatness of the threaded seat end face of automotive brakes, as described in the background section, this invention provides a device for testing the axial runout of the threaded seat end face of an automotive brake. This device is based on a digital dial indicator and, with the combined action of related mechanisms, can be easily connected to the threaded seat of the automotive brake during testing. The testing personnel only need to rotate the adjustment disc to quickly complete the axial runout test of the threaded seat end face. Because the testing personnel do not need to continuously and sequentially adjust the lower end of the probe of the digital dial indicator and different positions on the upper part of the threaded seat end face, this device provides convenience for the testing personnel and correspondingly improves testing efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A device for detecting the axial runout of the end face of a threaded hole in an automotive brake includes a digital dial indicator body, an upper fixed base, an adjusting disc, a connecting pipe, and a detection pipe. The upper fixed base has a detection hole, the digital dial indicator body is fixedly installed on the upper end of the upper fixed base, and the probe of the digital dial indicator body is movably located within the detection hole, with the lower end of the probe located outside the lower end of the upper fixed base. The upper end of the connecting pipe is fixedly installed on the lower end of the upper fixed base, and the outer side of the lower end of the connecting pipe has an external thread. The detection pipe is movably sleeved on the outer side of the connecting pipe, and the inner side of the adjusting disc is fixedly installed on the outer side of the detection pipe. A contact seat is located on one side of the lower end of the detection pipe, and the lower end of the contact seat slides in contact with the upper end of the end face of the brake threaded seat.

[0007] Furthermore, the inner diameter of the detection hole is larger than the outer diameter of the probe of the digital micrometer body.

[0008] Furthermore, the lower end of the probe and the upper end of the adjustment disc are in sliding contact.

[0009] Furthermore, the outer diameter of the detection tube is smaller than the inner diameter of the threaded end face of the oil outlet pipe and oil return pipe of the vehicle brake, and the outer diameter of the detection tube is larger than the inner diameter of the internal thread of the oil outlet pipe and oil return pipe.

[0010] Furthermore, the inner diameter of the detection tube is larger than the outer diameter of the connecting tube.

[0011] Compared with the prior art, the advantages of this utility model are as follows: After the lower end of the connecting pipe is screwed into the internal threads of the oil inlet and return pipes of the car brake, the lower end of the testing pipe contacts the end face of the internal thread seat of the oil inlet and return pipes. When the testing personnel rotate the adjustment disc, if there is unevenness in the upper part of the thread seat end face, the testing pipe will cause the probe of the digital micrometer body to move up or down through the adjustment disc. By observing the changes in the numbers displayed on the digital micrometer body, the testing personnel can intuitively understand whether there is a quality problem with the end face of the internal thread seat, thus bringing convenience to the testing personnel and improving the testing efficiency accordingly. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model and the brake.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the planar structure between the overall structure and the brake of this utility model. Detailed Implementation

[0016] Figure 1 , 2 As shown in Figure 3, an axial runout detection device for the end face of a threaded hole in an automotive brake includes a digital micrometer body 1, an upper fixed base 2, an adjusting plate 3, a connecting pipe 4, and a detection pipe 5. The upper fixed base 2 has a through-hole 21 at its front center. The lower end of the housing of the digital micrometer body 1 is fixedly mounted on the upper end of the upper fixed base 2, and the probe 11 of the digital micrometer body is movably located within the detection hole 21, with the lower end of the probe 11 located at the lower end of the upper fixed base 2. The upper center of the connecting pipe 4 is welded to the lower center of the upper fixed base 2, and the lower outer side of the connecting pipe 4 has an external thread 41. The detection pipe 5 is sleeved on the outer side of the middle part of the connecting pipe, and the middle part of the adjusting plate 3 is welded to the outer side of the middle part of the detection pipe 5. The lower center of the front end of the detection pipe 5 has an inverted triangular contact seat 51, and the lower end of the contact seat 51 slides in contact with the upper end of the threaded seat end face 61 of the oil inlet and return pipe of the brake 6.

[0017] Figure 1 , 2 As shown in Figure 3, the inner diameter of the test hole 21 is larger than the outer diameter of the probe 11 of the digital micrometer body. The lower end of the probe 11 slides in contact with the front side of the upper end of the adjusting disc 3. The outer diameter of the test tube 5 is slightly smaller than the inner diameter of the threaded end face 61 of the oil outlet and return pipes of the vehicle brake, and the outer diameter of the test tube 5 is larger than the inner diameter of the internal thread 62 of the oil outlet and return pipes. The inner diameter of the test tube 5 is slightly larger than the outer diameter of the middle part of the connecting pipe 4.

[0018] Figure 1 , 2As shown in Figure 3, in this new application, after the inspector screws the lower external thread of the connecting pipe 4 into the internal thread 62 of the oil inlet or return pipe of the car brake, the lower contact seat 51 of the test pipe slides into the end face 61 of the internal thread seat of the oil inlet and return pipe. Then, the inspector rotates the adjusting disc 3 clockwise or counterclockwise by hand (360 degrees for one turn). When there is unevenness in the upper part of the thread seat end face 61, the lower end of the contact seat 51 of the test pipe will move up or down along the upper part of the thread seat end face 61 (axial up or down movement). In this way, the test pipe will cause the adjusting disc 3 to move up or down, and then the probe 11 of the digital micrometer body will move up or down. Under the action of the digital micrometer body itself, the inspector can intuitively understand whether there is an axial runout quality problem of the internal thread seat end face by observing the change of the number displayed on the display screen of the digital micrometer body 1 (for example, if the number does not change, it means that the axial runout of the internal thread seat end face is good, and vice versa). This new invention brings convenience to testing personnel and improves testing efficiency accordingly.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0020] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting the axial runout of the end face of a threaded hole in an automotive brake, comprising a digital dial indicator body, an upper fixed base, an adjusting disc, a connecting pipe, and a detection pipe; characterized in that, The upper fixed base has a detection hole. The digital micrometer body is fixedly installed on the upper end of the upper fixed base, and the probe of the digital micrometer body is movably located inside the detection hole, with the lower end of the probe located outside the lower end of the upper fixed base. The upper end of the connecting pipe is fixedly installed on the lower end of the upper fixed base, and the lower end of the connecting pipe has an external thread. The detection tube is movably sleeved on the outside of the connecting pipe, and the inner side of the adjusting plate is fixedly installed on the outside of the detection tube. There is a contact seat on one side of the lower end of the detection tube, and the lower end of the contact seat slides in contact with the upper end of the brake threaded seat end face.

2. The axial runout detection device for the end face of a threaded hole in an automobile brake according to claim 1, characterized in that, The inner diameter of the test hole is larger than the outer diameter of the probe of the digital micrometer body.

3. The axial runout detection device for the end face of a threaded hole in an automobile brake according to claim 1, characterized in that, The lower end of the probe makes sliding contact with the upper end of the adjustment disc.

4. The axial runout detection device for the end face of a threaded hole in an automobile brake according to claim 1, characterized in that, The outer diameter of the detection tube is smaller than the inner diameter of the threaded end face of the oil outlet and return pipe of the vehicle brake, and the outer diameter of the detection tube is larger than the inner diameter of the internal thread of the oil outlet and return pipe.

5. The axial runout detection device for the end face of a threaded hole in an automobile brake according to claim 1, characterized in that, The inner diameter of the detection tube is larger than the outer diameter of the connecting tube.

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