Caliper inspection jig

Abstract

The utility model relates to mechanical parts detection technical field especially relates to a caliper inspection fixture. Including installation seat, guide slide rail, locating block, positioning pin, test caliper and clamping block etc. are all fixedly connected with guide slide rail in left and right sides of installation seat upper portion, one locating block and two left and right symmetrical arrangement's positioning pin are fixedly connected with installation seat upper portion rear side, and locating block and positioning pin all are located between two guide slide rails, and the test caliper is placed between two guide slide rails, and two positioning pins are all inserted into the installation hole slot on the test caliper, and the test caliper is in abutment with locating block, and the guide slide rail all slidingly connects with clamping block. The utility model integrates a plurality of functions of mistake proofing mechanism, positioning clamping, adjustable two arm inner side interval measurement and oil passage unobstructedness detection, and all projects are completed in one clamping, need not to change frock or repeatedly dismount work piece, significantly promote detection efficiency, reduce labour intensity.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts testing technology, and in particular to a caliper inspection fixture. Background Technology

[0002] In the production and maintenance of automotive braking systems, brake calipers are core safety components. Their dimensional accuracy, geometric tolerances, and piston movement performance are directly related to the reliability of the braking system and driving safety. These parts typically have multiple key dimensional features, such as the inner cavity profile, the distance between the two arms, the position of the mounting holes, and the wall thickness. There are many inspection items and high precision requirements.

[0003] Traditional inspection mainly relies on general measuring tools such as vernier calipers, micrometers, and plug gauges, which require measuring each dimension one by one, making the operation cumbersome. In addition, although some companies use special inspection tools for single-item inspection, different dimensions correspond to different fixtures, and the inspection process requires frequent tooling changes and repeated disassembly and assembly of workpieces, which not only increases the working time and labor intensity, but also causes the reference drift due to multiple positioning, which is prone to introducing human measurement errors.

[0004] Therefore, a caliper inspection fixture needs to be designed. Utility Model Content

[0005] To overcome the shortcomings of existing caliper testing methods, which require repeated clamping and have scattered testing items, this utility model provides a caliper inspection fixture.

[0006] A caliper inspection fixture includes a mounting base, guide rails, positioning blocks, positioning pins, a test caliper, clamping blocks, adjusting screws, a connecting frame, and a two-arm inner side distance detection structure. Guide rails are fixedly connected to the upper left and right sides of the mounting base. A positioning block and two symmetrically arranged positioning pins are fixedly connected to the upper rear side of the mounting base. The positioning block and positioning pins are located between the two guide rails. A test caliper is placed between the two guide rails. Both positioning pins are inserted into mounting holes on the test caliper, and the test caliper can abut against the positioning blocks. Clamping blocks are slidably connected to each guide rail. Adjusting screws are rotatably connected to the outer sides of each guide rail, and the adjusting screws are threadedly connected to the clamping blocks on the same side. A connecting frame is slidably connected between the two guide rails, and the two-arm inner side distance detection structure is provided on the upper part of the connecting frame.

[0007] Optionally, the inner side spacing detection structure of the two arms includes a slider, an elastic ball, an elastic element, a bidirectional screw, a scale, and a pointer. The upper left and right sides of the connecting frame are horizontally and laterally connected to sliders, and elastic balls are vertically and horizontally connected to the sliders. Elastic elements are connected between the elastic balls and the sliders. The upper rear side of the connecting frame is rotatably connected to the bidirectional screw. The two sliders are threadedly connected to the left-hand and right-hand sections of the bidirectional screw, respectively. A scale is fixedly connected to the upper rear side of the connecting frame. The scale has digital graduations. A pointer is connected to the side of the slider closest to the scale, and the pointer arrows all point to the digital graduations on the scale.

[0008] Optionally, it also includes a test rod and a connecting plate. The test rod is slidably mounted on the upper part of the positioning block. The test rod is a separate unit and can be pulled out along the axial direction. The upper section of the test rod is equipped with a connecting plate. The upper half of the test rod is green and the lower half is red, with the connecting plate as the dividing line.

[0009] Optionally, it also includes a fault-proofing protrusion, which is fixedly provided on the upper rear side of the mounting base. The fault-proofing protrusion is located on the front side of the positioning block, and the test caliper is placed above the fault-proofing protrusion.

[0010] Optionally, it also includes a soft pad, with soft pads provided on the clamping surfaces of the clamping blocks.

[0011] Optionally, the test caliper's oil passage side is provided with a raised structure. Beneficial effects

[0012] 1. This utility model integrates multiple functions such as error prevention mechanism, positioning clamping, adjustable inner distance measurement of two arms and oil passage unobstructedness detection into one unit. All items are completed in one clamping, without the need to change tooling or repeatedly disassemble and assemble workpieces, which significantly improves detection efficiency and reduces labor intensity.

[0013] 2. This utility model uses red and green color-coded test rods. After insertion, the blockage status can be instantly determined by the external color status. The distance between the two arms is measured by the scale and pointer. The difference is easy to calculate. The entire testing process does not require precision instruments or a lot of training time. The results can be determined quickly, making it suitable for mass production environments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the positioning block, positioning pin, and clamping block of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the connecting frame, slider, and elastic ball components of this utility model.

[0017] Figure 4This is a three-dimensional structural diagram of the test rod and connecting plate components of this utility model.

[0018] The markings in the attached diagram are as follows: 1: Mounting base, 101: Test caliper, 2: Guide rail, 3: Positioning block, 4: Positioning pin, 5: Clamping block, 6: Soft pad, 7: Adjusting screw, 8: Connecting bracket, 9: Slider, 10: Elastic ball, 11: Elastic element, 12: Bidirectional screw, 13: Scale, 14: Pointer, 15: Test rod, 16: Connecting plate, 17: Error-proof protrusion. Detailed Implementation

[0019] Example: A caliper inspection fixture, such as Figure 1 , Figure 2 and Figure 3 As shown, the device includes a mounting base 1, guide rails 2, positioning blocks 3, positioning pins 4, a test clamp 101, a clamping block 5, an adjusting screw 7, a connecting frame 8, and a structure for detecting the distance between the inner sides of the two arms. Guide rails 2 are fixedly connected to the upper left and right sides of the mounting base 1. A positioning block 3 and two symmetrically arranged positioning pins 4 are welded to the upper rear side of the mounting base 1. The positioning block 3 and positioning pins 4 are located between the two guide rails 2. A test clamp 101 is placed between the two guide rails 2, and both positioning pins 4 are inserted into it. Inside the mounting hole slot on the test caliper 101, there is a raised structure on the side of the test caliper 101 with the oil passage facing upward, which helps to identify the installation direction and improve the error prevention capability. The test caliper 101 can abut against the positioning block 3. Clamping blocks 5 are slidably connected to the guide slide rail 2. Adjusting screws 7 are rotatably connected to the outside of the guide slide rail 2. The adjusting screws 7 are threadedly connected to the clamping blocks 5 on the same side. A connecting frame 8 is slidably connected between the two guide slide rails 2. The upper part of the connecting frame 8 is provided with a two-arm inner side distance detection structure.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the structure for detecting the distance between the inner sides of the two arms includes a slider 9, an elastic ball 10, an elastic element 11, a bidirectional screw 12, a scale 13, and a pointer 14. The upper left and right sides of the connecting frame 8 are horizontally connected to the slider 9, and the slider 9 is vertically connected to the elastic ball 10. An elastic element 11 connects the elastic ball 10 to the slider 9. The upper rear side of the connecting frame 8 is rotatably connected to the bidirectional screw 12. The two sliders 9 are threadedly connected to the left-hand and right-hand sections of the bidirectional screw 12, respectively. The upper rear side of the connecting frame 8 is fixedly connected to the scale 13, which has a numerical graduation. A pointer 14 is connected to the slider 9 on the side closest to the scale 13, and the arrows of the pointers 14 all point to the numerical graduations on the scale 13. With the pointers 14, the distance between the two arms can be directly read, providing intuitive readings with small errors and high detection efficiency.

[0021] like Figure 1 , Figure 2 and Figure 4 As shown, it also includes a test rod 15 and a connecting plate 16. The test rod 15 is slidably mounted on the upper part of the positioning block 3. The test rod 15 is a separate unit and can be pulled out along the axial direction. The upper part of the test rod 15 is provided with the connecting plate 16. With the connecting plate 16 as the dividing line, the upper half of the test rod 15 is green and the lower half is red. The structure is simple and suitable for rapid batch inspection.

[0022] like Figure 2 As shown, it also includes a fault-proofing protrusion 17. The fault-proofing protrusion 17 is fixedly provided on the upper rear side of the mounting base 1. The fault-proofing protrusion 17 is located in front of the positioning block 3, and the test caliper 101 is placed above the fault-proofing protrusion 17. It matches the shape of the test caliper 101 to achieve physical fault prevention and ensure that the test object is correct.

[0023] like Figure 2 As shown, it also includes a soft pad 6. The clamping surfaces of the clamping block 5 are all provided with soft pads 6 to prevent damage to the caliper surface during clamping and to protect the quality of the workpiece.

[0024] In actual use of this equipment, the operator first places the test caliper 101 between the two guide rails 2 on the mounting base 1. The test caliper 101 has a raised structure only on the side with its oil passage facing upwards, which is an asymmetrical design. The bottom surface that contacts the mounting base 1 does not have this raised structure at the corresponding position. When the test caliper 101 is placed in the correct direction, the raised structure is on top and does not affect the fit with the mounting base 1. At the same time, the mounting hole slot at the rear end of the caliper can be smoothly aligned with the two positioning pins 4 on the mounting base 1 and inserted to achieve precise positioning. However, when the test caliper 101 is placed in the reverse direction, the raised structure that was originally on the upper surface faces downwards and interferes with the anti-misalignment protrusion 17, causing the entire caliper to be lifted up and unable to be fully lowered. At this time, the positioning pins 4 cannot be inserted into the mounting hole slot, and the caliper cannot complete the positioning, fundamentally preventing clamping in the wrong direction, eliminating the need for manual judgment, and preventing reverse mis-testing.

[0025] Next, after positioning, the operator rotates the adjusting screws 7 on both sides, causing the clamping block 5 to slide along the guide rail 2. The side with the soft pad 6 gradually presses against the outer wall of the caliper, achieving reliable clamping. Then, the distance between the inner sides of the two arms can be tested: the operator pushes the connecting frame 8, causing it to slide backward along the guide rail 2 into the inner area of ​​the test caliper 101. The two elastic balls 10 on the connecting frame 8 then enter the caliper. During this process, the elastic balls 10 are slightly compressed downward by the elastic element 11 under the constraint of the inner wall of the caliper. At this point, the operator needs to rotate the bidirectional screw 12 to drive the left and right sliders 9 to move in opposite directions or towards each other in the horizontal direction, thereby adjusting... The distance between the two elastic balls 10 is adapted to the opening distance of the piston chambers of different caliper models. Since the piston chamber is a cylindrical slot with an upward opening, when the elastic ball 10 moves to the position directly opposite its respective piston chamber, under the elastic force of the elastic element 11, the elastic ball 10 quickly bounces upward into the piston chamber, producing a clear sense of falling in. The operator can perceive the positioning status in this way to ensure that the detection point is accurate. The slider 9 is equipped with a pointer 14, which points to the scale 13 fixed on the other side of the connecting frame 8. By reading the scale values ​​corresponding to the two pointers 14 and calculating their difference, the actual distance between the inner sides of the two arms can be obtained, realizing a fast and intuitive measurement.

[0026] It should be noted that the appendix Figure 3 The test caliper 101 shown (see appendix) Figure 3 To clearly show the internal piston chamber, an inverted drawing method is used. However, in the actual testing process, the test caliper 101 needs to be installed in the normal working posture, that is: the side with the flat contact surface is facing down and is in contact with the anti-error protrusion 17 on the mounting base 1; the side with the protruding structure is facing up to avoid interference with the anti-error protrusion 17. At the same time, the openings of the two piston chambers inside the caliper are also facing up, so that the connecting bracket 8 that is subsequently pushed in can enter axially between the two arms of the caliper, and the elastic ball 10 is vertically embedded into the piston chamber under the action of elastic force, thus completing the automatic alignment of the measurement point.

[0027] Next, the oil passage patency is tested. The operator pulls the test rod 15 out from the connecting plate 16 and inserts it vertically into the oil inlet passage of the test caliper 101. The test rod 15 has a segmented structure, with the upper half painted green and the lower half painted red. If the oil passage is unobstructed, the test rod 15 can be smoothly inserted to the bottom. At this time, the red section is completely submerged in the oil passage, and only the green section is visible on the outside, which can be judged as unobstructed. If there are blockages such as iron filings, burrs, or shrinkage cavities in the oil passage, the test rod 15 cannot be inserted to the bottom, and the red section is still exposed, which is judged as blocked. This judgment method does not require reading or electricity, and can achieve a clear visual judgment by color.

[0028] Finally, for other conventional geometric dimensions on the test caliper 101, such as mounting hole position accuracy, wall thickness, and profile tolerance, which are not core functional items, this fixture can provide operators with a stable and uniform reference platform after positioning and clamping. In this state, operators can use general measuring tools, such as vernier calipers, micrometers, and go / no-go gauges, to quickly measure the relevant parts. After the final test is completed, rotate the adjusting screw 7 in the opposite direction to loosen the clamping block 5 and remove the test caliper 101.

Claims

1. A caliper inspection fixture, characterized in that: It includes a mounting base (1), guide rails (2), positioning blocks (3), positioning pins (4), test clamps (101), clamping blocks (5), adjusting screws (7), connecting brackets (8), and a spacing detection structure on the inner sides of the two arms. Guide rails (2) are fixedly connected to the upper left and right sides of the mounting base (1). A positioning block (3) and two symmetrically arranged positioning pins (4) are fixedly connected to the upper rear side of the mounting base (1). The positioning block (3) and positioning pins (4) are located between the two guide rails (2). A test caliper (101) is placed between the two guide rails (2). Two positioning pins (4) are inserted into the mounting holes on the test caliper (101), and the test caliper (101) can abut against the positioning block (3). Clamping blocks (5) are slidably connected to the guide rails (2). Adjusting screws (7) are rotatably connected to the outer side of the guide rails (2). The adjusting screws (7) are threadedly connected to the clamping blocks (5) on the same side. A connecting frame (8) is slidably connected between the two guide rails (2). The upper part of the connecting frame (8) is provided with a two-arm inner side spacing detection structure.

2. The caliper inspection fixture according to claim 1, characterized in that: The structure for detecting the distance between the inner sides of the two arms includes a slider (9), an elastic ball (10), an elastic element (11), a bidirectional screw (12), a scale (13), and a pointer (14). The upper left and right sides of the connecting frame (8) are horizontally connected to the slider (9). The slider (9) is connected to the elastic ball (10) in a sliding manner. The elastic ball (10) and the slider (9) are connected to the elastic element (11). The upper rear side of the connecting frame (8) is rotatably connected to the bidirectional screw (12). The two sliders (9) are threaded to the left-hand and right-hand sections of the bidirectional screw (12) respectively. The upper rear side of the connecting frame (8) is fixedly connected to the scale (13). The scale (13) is provided with a digital scale. The slider (9) is connected to the side of the scale (13) close to the slider (9). The arrow of the pointer (14) points to the digital scale on the scale (13).

3. The caliper inspection fixture according to claim 2, characterized in that: It also includes a test rod (15) and a connecting plate (16). The test rod (15) is slidably installed on the upper part of the positioning block (3). The test rod (15) is a separate unit and can be pulled out along the axial direction. The upper section of the test rod (15) is provided with a connecting plate (16). With the connecting plate (16) as the dividing line, the upper half of the test rod (15) is green and the lower half is red.

4. A caliper inspection fixture according to claim 3, characterized in that: It also includes a fault-proofing protrusion (17). The fault-proofing protrusion (17) is fixedly provided on the upper rear side of the mounting base (1). The fault-proofing protrusion (17) is located in front of the positioning block (3), and the test caliper (101) is placed above the fault-proofing protrusion (17).

5. A caliper inspection fixture according to claim 4, characterized in that: It also includes a soft pad (6), and the clamping surface of the clamping block (5) is provided with a soft pad (6).

6. A caliper inspection fixture according to claim 5, characterized in that: The test caliper (101) has a raised structure on the side with the oil passage facing upwards.

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