A coaxiality testing fixture

Abstract

This utility model relates to the field of shaft testing technology, specifically to a coaxiality testing fixture, including a mounting base plate, multiple rollers and pressure rollers for supporting the test workpiece, an adjusting screw on one side of the mounting base plate, a slide block slidably mounted on the outer side of the adjusting screw, a height adjusting block at the top of the slide block, and a positioning clamping assembly connected to the height adjusting block. The positioning clamping assembly includes V-blocks located at the top and bottom of the test workpiece, and an adjusting component at one end of the height adjusting block that can synchronously raise or lower the positioning clamping assembly. This utility model, through the V-block design, can quickly adjust and fix the height adjusting rod, avoiding collisions that can occur when adjusting the testing tool in traditional structures, thus preventing damage to the testing end. Simultaneously, the slot and V-block are perpendicularly positioned, ensuring that the push-type dial indicator is perpendicular to the axis of the test workpiece; thereby guaranteeing testing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of shaft testing technology, specifically to a coaxiality testing fixture. Background Technology

[0002] If the coaxiality is out of tolerance during the machining of shaft parts, abnormal vibration and accelerated wear may occur during assembly.

[0003] Therefore, it is necessary to perform coaxiality testing on the machined shaft parts. When using the dual-dial method for coaxiality testing, the testing ends of both dial indicators need to be simultaneously placed against the test workpiece. During the adjustment process, there may be loosening at the connection point, which may cause the connecting rod with the dial indicator to detach and slide down, resulting in the testing probe colliding with the test workpiece and causing the probe to deform or bend. At the same time, during the placement of the dial indicators, it is also necessary to ensure that both dial indicators are located at both ends of the test workpiece. The placement process is relatively time-consuming, and if the position is not accurate, it may lead to a decrease in testing accuracy.

[0004] Therefore, it is necessary to invent a coaxiality testing fixture to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a coaxiality testing fixture that solves the problems of dial indicators being inconvenient to adjust in actual use, and the possibility of probes impacting and deforming the workpiece during adjustment. It also solves the problem of dial indicators being inconvenient to place at both ends of the test workpiece, and the time-consuming placement of the dial indicator.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coaxiality testing fixture includes a mounting base plate for supporting multiple rollers and pressure rollers on the test workpiece. An adjusting screw is provided on one side of the mounting base plate, and a slide block is slidably mounted on the outer side of the adjusting screw. A height adjusting block is provided at the top of the slide block, and a positioning clamping assembly is connected to the height adjusting block. The positioning clamping assembly includes V-blocks located at the top and bottom of the test workpiece, respectively. One end of the height adjusting block is provided with an adjusting component capable of synchronously raising or lowering the positioning clamping assembly. A press-type dial indicator capable of height adjustment is detachably mounted on one side of the V-block.

[0008] In a preferred embodiment of this utility model, a height adjustment rod is connected to one side of the V-shaped block. The adjustment assembly includes an E-shaped connecting block. Two longitudinal sliders are slidably installed on one side of the E-shaped connecting block. The height adjustment rod slides along the longitudinal sliders. A waist-shaped adjustment rod is provided on one side of the E-shaped connecting block. A central hinge block is hinged to the middle of the waist-shaped adjustment rod. The central hinge block is fixedly installed in the middle of the E-shaped connecting block. Outer hinge blocks are slidably installed on both sides of the waist-shaped adjustment rod. The outer hinge blocks are fixedly installed on the outer side of the longitudinal sliders.

[0009] As a preferred embodiment of this utility model, one side of the waist-shaped adjusting rod extends outward, and a limiting plate is installed on one side of the E-shaped connecting block. The limiting plate has a positioning groove, and a limiting pin for intercepting the extended end of the waist-shaped adjusting rod is inserted in the positioning groove. When the waist-shaped adjusting rod changes from a horizontal state to an inclined state, it can drive the V-shaped block to slide outward synchronously.

[0010] As a preferred embodiment of this utility model, the two ends of the E-type connecting block are provided with longitudinal grooves, and the longitudinal slider is threadedly connected to a locking knob two for locking the height adjustment rod on the side where the longitudinal groove is located. The locking knob two can slide along the inner side of the longitudinal groove.

[0011] As a preferred embodiment of this utility model, a mounting block is provided on one side of the V-shaped block where the tip is located. The inner side of the mounting block is provided with a slot for inserting a push-button dial indicator. One side of the mounting block is provided with an adjustment knob for adjusting the push-button dial indicator. The other side of the mounting block is provided with a locking knob for locking the push-button dial indicator.

[0012] In a preferred embodiment of this utility model, the slot is arranged perpendicularly to the V-block, and the V-blocks on both sides are arranged symmetrically.

[0013] As a preferred embodiment of this utility model, the top of the slide is provided with a longitudinal adjustment shaft, and the height adjustment block slides along the longitudinal adjustment shaft.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] In this invention, V-blocks at both ends are used for synchronous clamping, and the height adjustment rod is fixed by locking knob two, so that the V-blocks are in contact with the test workpiece, placing the push-type dial indicator in a suitable position. The V-blocks are then raised synchronously by the adjustment component, and the push-type dial indicator is brought into contact with one side of the test workpiece by adjusting knob one, achieving simultaneous detection of both ends of the test workpiece. The V-block design allows for quick adjustment and fixation of the height adjustment rod, avoiding collisions that could damage the detection end when adjusting the testing tool in traditional structures. Furthermore, the slot is perpendicular to the V-block, ensuring that the push-type dial indicator is perpendicular to the axis of the test workpiece, thus guaranteeing detection accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the slide assembly position structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the positional structure of the V-shaped block and the push-button dial indicator of this utility model;

[0019] Figure 4 This is a schematic diagram of the position structure of the adjustment component of this utility model;

[0020] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 6 This utility model Figure 4 Enlarged structural diagram at point B.

[0022] Explanation of reference numerals in the attached drawings: 1. Mounting base plate; 2. Roller; 3. Pressure roller; 4. Test workpiece; 5. Adjusting screw; 6. Slide block; 7. Longitudinal adjusting shaft; 8. Height adjusting block; 9. E-type connecting block; 10. V-block; 11. Slot; 12. Locking knob one; 13. Adjustment knob one; 14. Press-type dial indicator; 15. Longitudinal slide groove; 16. Limiting plate; 17. Longitudinal slider; 18. Locking knob two; 19. Height adjusting rod; 20. Limiting pin; 21. Waist-shaped adjusting rod; 22. Middle hinge block; 23. Outer hinge block. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0024] This utility model provides, for example Figure 1-6The coaxiality testing fixture shown includes a mounting base plate 1, multiple rollers 2 and pressure rollers 3 for supporting the test workpiece 4, an adjusting screw 5 on one side of the mounting base plate 1, a slide block 6 slidably mounted on the outer side of the adjusting screw 5, a height adjusting block 8 at the top of the slide block 6, and a positioning clamping assembly connected to the height adjusting block 8. The positioning clamping assembly includes V-blocks 10 located at the top and bottom of the test workpiece 4, respectively. One end of the height adjusting block 8 is equipped with an adjusting component capable of synchronously raising or lowering the positioning clamping assembly. A press-type dial indicator 14 capable of height adjustment is detachably mounted on one side of the V-block 10. The adjusting screw 5 is used to adjust the position of the slide block 6 to facilitate testing of multiple end faces. One end of the adjusting screw 5 is connected to a manual crank or a servo motor.

[0025] A height adjustment rod 19 is connected to one side of the V-block 10. The adjustment assembly includes an E-type connecting block 9. Two longitudinal sliders 17 are slidably mounted on one side of the E-type connecting block 9. The height adjustment rod 19 slides along the longitudinal sliders 17. A waist-shaped adjustment rod 21 is provided on one side of the E-type connecting block 9. A central hinge block 22 is hinged to the middle of the waist-shaped adjustment rod 21. The central hinge block 22 is fixedly installed in the middle of the E-type connecting block 9. Outer hinge blocks 23 are slidably mounted on both sides of the waist-shaped adjustment rod 21. The outer hinge blocks 23 are fixedly installed on the outside of the longitudinal sliders 17. By controlling the rotation of the outer hinge blocks 23, the two V-blocks 10 on both sides can be raised synchronously, avoiding contact between the test workpiece 4 and the V-block 10 during rotation, which would affect the measurement accuracy.

[0026] One side of the waist-shaped adjusting rod 21 extends outward, and a limiting plate 16 is installed on one side of the E-type connecting block 9. The limiting plate 16 has a positioning groove, and a limiting pin 20 for intercepting the extended end of the waist-shaped adjusting rod 21 is inserted into the positioning groove. When the waist-shaped adjusting rod 21 changes from a horizontal state to an inclined state, it can drive the V-block 10 to slide outward synchronously. The V-block 10 slides outward synchronously, and the pressing dial indicator 14 is brought into contact with the test workpiece 4 by controlling the adjustment knob 13. During position adjustment, the detection end of the pressing dial indicator 14 can be prevented from colliding with the test workpiece 4 during the calibration process. While ensuring the measurement effect, the probe of the pressing dial indicator 14 is not damaged, and the measurement difficulty is reduced.

[0027] The E-type connecting block 9 has longitudinal grooves 15 at both ends. The longitudinal slider 17 is threadedly connected to a locking knob 18 for locking the height adjustment rod 19 on the side where the longitudinal groove 15 is located. The locking knob 18 can slide along the inner side of the longitudinal groove 15. The longitudinal groove 15 is provided to ensure the locking effect of the longitudinal slider 17 on the height adjustment rod 19 when the longitudinal slider 17 slides back and forth.

[0028] A mounting block is provided on one side of the V-block 10, at the tip. The inner side of the mounting block has a slot 11 for inserting a push-button dial indicator 14. One side of the mounting block has an adjustment knob 13 for adjusting the push-button dial indicator 14, and the other side has a locking knob 12 for locking the push-button dial indicator 14. The adjustment knob 13 is used to fine-tune the position of the push-button dial indicator 14. After being adjusted to a suitable position by the V-block 10, the detection end of the push-button dial indicator 14 is adjusted to fit against the test workpiece 4.

[0029] The slot 11 is perpendicular to the V-block 10, and the V-blocks 10 on both sides are symmetrically arranged. By symmetrically arranging the V-blocks 10, the position of the axis of the test workpiece 4 can be measured simultaneously at both ends. By vertically arranging the slot 11, the detection end of the press-type dial indicator 14 is perpendicular to the test workpiece 4, thereby improving the accuracy of the test.

[0030] The top of the slide block 6 is provided with a longitudinal adjustment shaft 7, and the height adjustment block 8 slides along the longitudinal adjustment shaft 7. The inner side of the height adjustment block 8 is provided with a positioning structure for fixing its position on the longitudinal adjustment shaft 7.

[0031] This invention utilizes V-blocks 10 at both ends to clamp the workpiece 4 simultaneously, and a locking knob 18 to fix the height adjustment rod 19, ensuring the V-blocks 10 are in contact with the workpiece 4. This positions the push-type dial indicator 14 appropriately. The adjustment assembly simultaneously raises the V-blocks 10, and the adjustment knob 13 moves the push-type dial indicator 14 towards one side of the workpiece 4, enabling simultaneous detection of both ends of the workpiece 4. The V-blocks 10 allow for quick adjustment and fixation of the height adjustment rod 19, avoiding collisions that could damage the detection end during tool adjustment, as is common in traditional structures. Furthermore, the slot 11 is perpendicular to the V-blocks 10, ensuring the push-type dial indicator 14 is perpendicular to the axis of the workpiece 4, thus guaranteeing detection accuracy.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A coaxiality test fixture, characterized by: The device includes a mounting base plate (1), multiple rollers (2) and pressure rollers (3) for supporting the test workpiece (4), an adjusting screw (5) is provided on one side of the mounting base plate (1), a slide block (6) is slidably provided on the outer side of the adjusting screw (5), a height adjusting block (8) is provided at the top of the slide block (6), the height adjusting block (8) is connected to a positioning clamping assembly, the positioning clamping assembly includes V-blocks (10) located at the top and bottom of the test workpiece (4) respectively, one end of the height adjusting block (8) is provided with an adjusting component that can synchronously raise or lower the positioning clamping assembly, and a press-type dial indicator (14) that can adjust the height is detachably installed on one side of the V-block (10).

2. The coaxiality test fixture of claim 1, wherein: A height adjustment rod (19) is connected to one side of the V-shaped block (10). The adjustment assembly includes an E-shaped connecting block (9). Two longitudinal sliders (17) are slidably installed on one side of the E-shaped connecting block (9). The height adjustment rod (19) slides along the longitudinal sliders (17). A waist-shaped adjustment rod (21) is provided on one side of the E-shaped connecting block (9). A middle hinge block (22) is hinged to the middle of the waist-shaped adjustment rod (21). The middle hinge block (22) is fixedly installed in the middle of the E-shaped connecting block (9). Outer hinge blocks (23) are slidably installed on both sides of the waist-shaped adjustment rod (21). The outer hinge blocks (23) are fixedly installed on the outer side of the longitudinal sliders (17).

3. A coaxiality testing tool according to claim 2, wherein: One side of the waist-shaped adjusting rod (21) extends outward, and a limiting plate (16) is installed on one side of the E-type connecting block (9). The limiting plate (16) has a positioning groove, and a limiting pin (20) for intercepting the extended end of the waist-shaped adjusting rod (21) is inserted in the positioning groove. When the waist-shaped adjusting rod (21) changes from a horizontal state to an inclined state, it can drive the V-shaped block (10) to slide outward synchronously.

4. The coaxiality test fixture of claim 2, wherein: The E-type connecting block (9) has longitudinal grooves (15) at both ends. The longitudinal slider (17) is threadedly connected to a locking knob (18) for locking the height adjustment rod (19) on the side where the longitudinal groove (15) is located. The locking knob (18) can slide along the inner side of the longitudinal groove (15).

5. The coaxiality test fixture of claim 1, wherein: A mounting block is provided on one side of the V-shaped block (10), and a slot (11) for inserting a push-button dial indicator (14) is provided on the inner side of the mounting block. An adjustment knob (13) for adjusting the push-button dial indicator (14) is provided on one side of the mounting block, and a locking knob (12) for locking the push-button dial indicator (14) is provided on the other side of the mounting block.

6. A coaxiality testing tool according to claim 5, wherein: The slot (11) is perpendicular to the V-block (10), and the V-blocks (10) on both sides are symmetrically arranged.

7. The coaxiality testing tool of claim 1, wherein: The top of the slide (6) is provided with a longitudinal adjustment shaft (7), and the height adjustment block (8) slides along the longitudinal adjustment shaft (7).

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