A thickness precision and rapid inspection fixture

Abstract

This utility model discloses a thickness precision and rapid inspection fixture, comprising: a base, a first slide rail fixed to the top of the base, a slider slidably connected to the end face of the first slide rail, a sleeve fixed to the top of the slider, a column slidably connected to the inner cavity of the sleeve, a second spring fixed to the bottom of the column, two sets of support rods fixed to the column body, an abutment block fixed to the end of the lower support rod, a ball bearing provided at the top of the abutment block, a gauge fixed to the end of the upper support rod, a pressure rod passing through the gauge body, a connecting ring fixed to the top edge of the base, and four evenly distributed clamping blocks centering and clamping the workpiece through the central hole, ensuring that the central axis of the workpiece coincides with the rotation center of the fixture during each clamping, avoiding detection benchmark deviation caused by clamping offset.

Description

Technical Field

[0001] This utility model relates to the field of thickness inspection fixture technology, specifically a thickness precision and rapid inspection fixture. Background Technology

[0002] Large drive gears are key components in heavy machinery transmission systems. Their surfaces are often machined with layers and textures to meet different requirements, resulting in poor surface flatness. In actual production, the thickness of these parts is a critical parameter affecting the assembly accuracy and performance of the product, thus requiring precise measurement. Currently, for large gears with complex curved surface features, thickness measurement largely relies on manual operation using general measuring tools (such as calipers and dial indicators).

[0003] However, for workpieces with curved or uneven surfaces, it is difficult to ensure that each measurement is performed at the same reference position. Manual operation is easily affected by subjective factors, which is not only inefficient, but also makes it difficult to guarantee the accuracy and reliability of batch inspection. To address this, we propose a precision and rapid thickness inspection fixture. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a thickness precision and rapid inspection fixture, comprising: a base, a first slide rail fixed to the top of the base, a slider slidably connected to the end face of the first slide rail, a sleeve fixed to the top of the slider, a column slidably connected to the inner cavity of the sleeve, a second spring fixed to the bottom of the column, two sets of support rods fixed to the column body, an abutment block fixed to the end of the lower support rod, a ball bearing provided at the top of the abutment block, a gauge fixed to the end of the upper support rod, a pressure rod penetrating the gauge body, a connecting ring fixed to the top edge of the base, a rotating column rotatably connected to the inner ring of the connecting ring via a bearing, a base fixed to the top of the rotating column, and a mounting block fixed to the top of the base. A movable block is slidably connected to the column body of the block. A clamping block is fixed to the outer side of the movable block. An installation groove is opened at the top of the movable block. A first spring is fixed in the inner cavity of the installation groove. A first rotating shaft is rotatably connected to the center of the inner cavity of the mounting block through a bearing. A pressing column is fixed to the shaft of the first rotating shaft. A first worm gear is fixed to the bottom end of the first rotating shaft through the base. A first worm is meshed on one side of the first worm gear. A first knob is fixed to one end of the first worm through the rotating column. A second rotating shaft is fixed to the bottom end of the rotating column. The end of the second rotating shaft is rotatably connected to the base through a bearing. A second worm gear is fixed to the shaft of the second rotating shaft. A second worm is meshed on one side of the second worm gear. A second knob is fixed to one end of the second worm through the front end of the base.

[0005] As a preferred embodiment of this utility model, the bottom end of the second spring is fixed to the bottom of the inner cavity of the sleeve, the inner cavity sidewall of the sleeve is provided with two sets of guide grooves, and the end of the column is fixed with two sets of guide blocks that cooperate with the guide grooves.

[0006] As a preferred embodiment of this utility model, the movable blocks are arranged in four groups and are evenly distributed along the circumference of the mounting blocks.

[0007] As a preferred technical solution of this utility model, a sliding groove is provided on the mounting block corresponding to each of the moving blocks, and a stop block is fixedly provided at the outer end of the sliding groove. One end of the first spring is fixedly connected to the bottom of the mounting groove, and the other end is fixedly connected to the stop block.

[0008] As a preferred embodiment of this utility model, the body of the extrusion column is uniformly fixed with four sets of arc-shaped blocks, and the arc-shaped blocks abut against the end face of the moving block.

[0009] As a preferred embodiment of this utility model, a fastening nut is threadedly connected to one side of the slider, and the end of the fastening nut can abut against the first slide rail to lock the slider.

[0010] As a preferred embodiment of this utility model, the transmission pair between the first worm gear and the first worm has a self-locking function, and the transmission pair between the second worm gear and the second worm has a self-locking function.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) High detection accuracy and stable reference: The workpiece is centered and clamped by four sets of evenly distributed clamping blocks from the center hole of the workpiece, ensuring that the central axis of the workpiece coincides with the rotation center of the fixture each time it is clamped, avoiding the deviation of the detection reference caused by clamping offset; the ball at the top of the abutment block adapts to the bottom of the workpiece through the elastic force of the second spring, so that even if there is unevenness or texture on the surface of the workpiece, the ball can always maintain reliable contact with the surface of the workpiece, and the rolling contact can reduce frictional damage to the surface of the workpiece; at the same time, the detection gauge and the abutment block are rigidly connected by the column, ensuring that the detection axis is perpendicular to the reference abutment surface, avoiding the error caused by the deviation of the detection direction.

[0013] (2) High detection efficiency and suitable for batch detection: The workpiece can be rotated around the center by the second knob, and the detection points on the same circumference can be quickly switched without the need to readjust the position of the detection components. It is suitable for batch detection needs with multiple points and the detection efficiency is significantly improved. The detection components slide along the first slide rail and are quickly locked with the fastening nut. Different diameter points can be detected without disassembling and reassembling the structure. It is suitable for the detection needs of large drive teeth of different specifications and has strong versatility.

[0014] (3) Low operation difficulty and reduced human error: The fixture realizes workpiece centering, reference positioning and position switching through mechanical structure, without the need for professional measurement skills, which can reduce the influence of the operator's subjective factors on the test results. The abutment block uses ball bearings to contact the workpiece surface, which transforms sliding friction into rolling friction. This not only reduces wear on the workpiece surface texture, but also reduces movement resistance and facilitates fine adjustment of the test point.

[0015] (4) Stable and reliable structure, improving accuracy: At the same time, the guide groove-guide block of the sleeve and column cooperate to ensure the movement accuracy of the detection component. The self-locking function of the two sets of worm gear-worm transmission pairs can keep the workpiece clamping state and detection position unchanged in case of accidental operation by the operator, ensuring the accuracy of detection. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a top view of the clamping mechanism of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the movable block of this utility model;

[0022] Figure 6 This is a diagram showing the internal structure of the sleeve of this utility model.

[0023] In the diagram: 1. Base; 2. First slide rail; 3. Slider; 4. Sleeve; 5. Column; 6. Support rod; 7. Fastening nut; 8. Abutment block; 9. Ball bearing; 10. Indicator gauge; 11. Pressure rod; 12. Connecting ring; 13. Rotating column; 14. Base support; 15. Mounting block; 16. Moving block; 17. Clamping block; 18. Mounting groove; 19. First spring; 20. First rotating shaft; 21. Extrusion column; 22. First worm gear; 23. First worm; 24. First knob; 25. Second rotating shaft; 26. Second worm gear; 27. Second worm; 28. Second knob; 29. ​​Guide groove; 30. Guide block; 31. Second spring; 32. Stop block. Detailed Implementation

[0024] 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.

[0025] Example

[0026] Please see Figure 1-6 This utility model provides the following technical solution: a thickness precision and rapid inspection fixture, comprising: a base 1, a first slide rail 2 fixed to the top of the base 1, a slider 3 slidably connected to the end face of the first slide rail 2, a sleeve 4 fixed to the top of the slider 3, a column 5 slidably connected to the inner cavity of the sleeve 4, a second spring 31 fixed to the bottom of the column 5, two sets of support rods 6 fixed to the column body of the column 5, an abutment block 8 fixed to the end of the lower support rod 6, a ball bearing 9 provided at the top of the abutment block 8, a gauge 10 fixed to the end of the upper support rod 6, a pressure rod 11 penetrating the gauge body of the gauge 10, a connecting ring 12 fixed to the top edge of the base 1, a rotating column 13 rotatably connected to the inner ring of the connecting ring 12 via a bearing, a base support 14 fixed to the top of the rotating column 13, a mounting block 15 fixed to the top of the base support 14, and a column body slidably connected to the mounting block 15. A movable block 16 is provided, with a clamping block 17 fixed to its outer side. A mounting groove 18 is provided at the top of the movable block 16, and a first spring 19 is fixed in the inner cavity of the mounting groove 18. A first rotating shaft 20 is rotatably connected to the center of the inner cavity of the mounting block 15 via a bearing. A pressing column 21 is fixed to the shaft of the first rotating shaft 20. A first worm gear 22 is fixed to the bottom end of the first rotating shaft 20 through the base 14. A first worm 23 is meshed on one side of the first worm gear 22. A first knob 24 is fixed to one end of the first worm 23 through the rotating column 13. A second rotating shaft 25 is fixed to the bottom end of the rotating column 13. The end of the second rotating shaft 25 is rotatably connected to the base 1 via a bearing. A second worm gear 26 is fixed to the shaft of the second rotating shaft 25. A second worm 27 is meshed on one side of the second worm gear 26. A second knob 28 is fixed to one end of the second worm 27 through the front end of the base 1.

[0027] To ensure that the column 5 has a stable elastic reset capability when sliding in the inner cavity of the sleeve 4, and to limit the radial displacement of the column 5 by the cooperation of the guide groove 29 and the guide block 30, so as to ensure that the column 5 only moves along the axial direction, thereby ensuring the relative position accuracy of the detection gauge 10 and the abutment block 8, and avoiding the impact of the thickness detection benchmark on the shaking of the column 5, in this embodiment, as a preferred technical solution of the present invention, the bottom end of the second spring 31 is fixed to the bottom of the inner cavity of the sleeve 4, two sets of guide grooves 29 are opened on the inner cavity sidewall of the sleeve 4, and two sets of guide blocks 30 that cooperate with the guide grooves 29 are fixed at the end of the column 5.

[0028] In order to achieve uniform multi-point clamping from the circumference of the workpiece center hole, so that the clamping force is symmetrically distributed along the circumference of the workpiece, avoid workpiece clamping offset caused by single-point or non-uniform clamping, and ensure that the workpiece center axis coincides with the rotation center of the fixture, thus laying a centering foundation for subsequent accurate detection, in this embodiment, as a preferred technical solution of the present invention, the moving block 16 is provided in four sets and is evenly distributed along the circumference of the mounting block 15.

[0029] In order to provide a stable sliding trajectory for the moving block 16 and avoid jamming or deviation during the sliding process, and at the same time limit the maximum radial displacement of the moving block 16 by the stop block 32 to ensure the stability of the moving block 16, and provide a fixed connection end point for the first spring 19 to ensure that the first spring 19 can stably realize the functions of stretching energy storage and reset, in this embodiment, as a preferred technical solution of the present invention, a sliding groove is opened on the mounting block 15 corresponding to each moving block 16, and a stop block 32 is fixedly provided at the outer end of the sliding groove. One end of the first spring 19 is fixedly connected to the bottom of the mounting groove 18, and the other end is fixedly connected to the stop block 32.

[0030] In order to ensure that when the extrusion column 21 rotates, the arc-shaped blocks evenly push against the moving block 16 through the gradual contour, so as to achieve smooth adjustment of the radial displacement of the moving block 16 and avoid excessive instantaneous force on the moving block 16 due to rigid contact; at the same time, the four sets of arc-shaped blocks correspond one-to-one with the four sets of moving blocks 16 to ensure that each moving block 16 moves synchronously and evenly, and to ensure the centering accuracy of the workpiece clamping, in this embodiment, as a preferred technical solution of the present invention, the column body of the extrusion column 21 is evenly fixed with four sets of arc-shaped blocks, and the arc-shaped blocks abut against the end face of the moving block 16.

[0031] In order to lock the position of slider 3 by the contact friction between the fastening nut 7 and the first slide rail 2 after slider 3 moves along the first slide rail 2 to the target detection position, and to prevent slider 3 from shifting due to external force disturbance during the detection process, so as to ensure the relative position stability of the detection component and the workpiece detection point and avoid displacement affecting the accuracy of thickness detection data, in this embodiment, as a preferred technical solution of the present invention, a fastening nut 7 is threadedly connected to one side of slider 3, and the end of the fastening nut 7 can abut against the first slide rail 2 to lock slider 3.

[0032] To prevent the first worm gear 22 and the first worm 23 from rotating in opposite directions due to external forces while the workpiece is clamped, thus causing the clamping to loosen; and to prevent the second worm gear 26 and the second worm 27 from rotating in opposite directions due to external disturbances during the workpiece rotation detection process, thereby ensuring the stable locking of the clamping and rotation positions and guaranteeing the reliability of the detection process, in this embodiment, as a preferred technical solution of the present invention, the transmission pair of the first worm gear 22 and the first worm 23 has a self-locking function, and the transmission pair of the second worm gear 26 and the second worm 27 also has a self-locking function.

[0033] The detection meter in this embodiment is a known technology that has been widely used in daily life. Its working principle is based on the principle of contact mechanical measurement. Its core is to make contact with the surface of the object being measured by a high-precision probe, convert the contact displacement into a mechanical or electrical signal change, and then drive the pointer or digital display to show the value through a transmission mechanism.

[0034] In summary, with the help of the above-described technical solution of this utility model,

[0035] Working Principle: The operator first places the large drive gear workpiece to be inspected on the base 14 of the fixture, using its center hole as a reference, to ensure initial workpiece positioning. Then, the operator rotates the first knob 24, which drives the first worm gear 23 to rotate around its own axis. Since the first worm gear 23 and the first worm wheel 22 form a meshing transmission pair, and this transmission pair has a self-locking function, the rotation of the first worm gear 23 will drive the first worm wheel 22 to rotate synchronously. The first worm wheel 22 is fixedly connected to the first rotating shaft 20, so the first rotating shaft 20 will rotate together with the first worm wheel 22, driving the fixed extrusion column 21 to rotate. The extrusion column 21 has four sets of evenly distributed arc-shaped blocks. As the extrusion column 21 rotates, the arc-shaped blocks gradually push against the moving block 16, causing the moving block 16 to move radially outward along the sliding groove on the mounting block 15, thereby driving the clamping block 17 fixed on its outer side to move synchronously, ultimately achieving multi-point centering and clamping of the workpiece from the inside of the workpiece's center hole. During this process, the first spring 19 in the mounting groove 18 at the top of the moving block 16 is stretched and stored to provide reset power for subsequent workpiece unlocking; at the same time, the stop block 32 at the outer end of the sliding groove of the mounting block 15 can limit the maximum displacement of the moving block 16 and ensure that the position of one end of the first spring 19 is fixed.

[0036] After the workpiece is fixed, the operator adjusts the position of the detection components according to the detection requirements: pushing the slider 3 along the first slide rail 2 causes the slider 3 to move the top sleeve 4, column 5, and the subsequent connected detection structure as a whole until they approach the area to be detected on the workpiece. Since the column 5 and the sleeve 4 are slidably connected, and a second spring 31 is provided between the bottom of the inner cavity of the sleeve 4 and the bottom of the column 5, the operator can gently press down on the column 5 to compress the second spring 31 and move the column 5 down along the inner cavity of the sleeve 4; at the same time, the guide block 30 fixed at the end of the column 5 slides along the guide groove 29 on the side wall of the inner cavity of the sleeve 4, ensuring that the column 5 only moves axially and does not deviate radially. When the abutment block 8 at the end of the lower support rod 6 of the column 5 moves to the bottom of the workpiece, the pressing force is released, the second spring 31 releases its elastic potential energy, and pushes the ball 9 at the top of the abutment block 8 to fit tightly against the bottom surface of the workpiece, completing the adaptive positioning of the detection reference. Continue fine-tuning the position of slider 3 along the first slide rail 2 until ball 9 rolls to the specific detection point. Then, tighten the fastening nut 7 on one side of slider 3 until the end of the nut is in close contact with the surface of the first slide rail 2. The position of slider 3 is locked by friction, preventing component displacement during the detection process from affecting accuracy. After the detection component is positioned, the operator presses down on the pressure rod 11 on the gauge 10 so that the lower end of the pressure rod 11 contacts the top of the workpiece at the detection position. The thickness data of the workpiece at that point is directly obtained through the pointer reading or digital display of the gauge 10. The gauge 10 is fixed to the column 5 by the upper support rod 6, and its detection axis is perpendicular to the contact reference of ball 9, ensuring the accuracy of thickness detection.

[0037] When it is necessary to inspect other points on the same circumference diameter of the workpiece, there is no need to readjust the position of slider 3. Simply rotate the second knob 28: the second knob 28 drives the second worm 27 to rotate, and the second worm 27 meshes with the second worm wheel 26. This transmission pair also has a self-locking function, which in turn drives the second rotating shaft 25, which is fixed to the second worm wheel 26, to rotate. The second rotating shaft 25 is fixed to the rotating column 13, and the rotating column 13 is rotatably connected to the connecting ring 12 through a bearing. Therefore, the rotating column 13 will drive the bottom support 14 at the top and the fixed workpiece to rotate around its own axis, realizing quick switching inspection of different points of the same diameter without repeated clamping. If it is necessary to inspect the thickness of different diameters of the workpiece, simply loosen the fastening nut 7, move slider 3 along the first slide rail 2, and drive the entire inspection component to adjust its position radially. This completes the adjustment of different diameter points, making the inspection operation convenient and the positioning accuracy high.

[0038] After all tests are completed, the first knob 24 is rotated in the opposite direction, causing the first worm gear 23 to drive the first worm wheel 22 to rotate in the opposite direction, thereby allowing the thin-walled part of the arc-shaped block of the extrusion column 21 to abut against the moving block 16; at this time, the first spring 19 releases its stored energy, pulling the moving block 16 to return to its original position radially inward along the sliding groove of the mounting block 15, and the clamping block 17 disengages from the center hole of the workpiece, releasing the clamp on the workpiece, so that the operator can easily take out the workpiece and complete a single test process.

[0039] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precision and rapid thickness inspection fixture, characterized in that, include: The base (1) has a first slide rail (2) fixed at its top end. A slider (3) is slidably connected to the end face of the first slide rail (2). A sleeve (4) is fixed at the top end of the slider (3). A column (5) is slidably connected to the inner cavity of the sleeve (4). A second spring (31) is fixed at the bottom end of the column (5). Two sets of support rods (6) are fixed to the column body of the column (5). An abutment block (8) is fixed at the end of the lower end of the support rod (6). A ball bearing (9) is provided at the top end of the abutment block (8). A gauge (10) is fixed to the end of the upper support rod (6). A pressure rod (11) passes through the gauge body of the gauge (10). A connecting ring (12) is fixed to the top edge of the base (1). A rotating column (13) is rotatably connected to the inner ring of the connecting ring (12) through a bearing. A base support (14) is fixed to the top of the rotating column (13). A mounting block (15) is fixed to the top of the base support (14). A moving block (16) is slidably connected to the column body of the mounting block (15). A clamping block (17) is fixed on the outside. A mounting groove (18) is provided at the top of the moving block (16). A first spring (19) is fixed in the inner cavity of the mounting groove (18). A first rotating shaft (20) is rotatably connected to the center of the inner cavity of the mounting block (15) through a bearing. A pressing column (21) is fixed on the shaft of the first rotating shaft (20). A first worm gear (22) is fixed at the bottom end of the first rotating shaft (20) through the base (14). A first worm (23) is meshed on one side of the first worm gear (22). One end of the first worm (23) passes through the rotating column (13) and is fixed with a first knob (24). The bottom end of the rotating column (13) is fixed with a second rotating shaft (25). The end of the second rotating shaft (25) is rotatably connected to the base (1) through a bearing. The shaft of the second rotating shaft (25) is fixed with a second worm wheel (26). One side of the second worm wheel (26) is meshed with a second worm (27). One end of the second worm (27) passes through the front end of the base (1) and is fixed with a second knob (28).

2. The thickness precision and rapid inspection fixture according to claim 1, characterized in that: The bottom end of the second spring (31) is fixed to the bottom of the inner cavity of the sleeve (4). The inner cavity sidewall of the sleeve (4) is provided with two sets of guide grooves (29). The end of the column (5) is fixed with two sets of guide blocks (30) that cooperate with the guide grooves (29).

3. The thickness precision and rapid inspection fixture according to claim 1, characterized in that: The movable blocks (16) are arranged in four groups and are evenly distributed along the circumference of the mounting blocks (15).

4. The thickness precision and rapid inspection fixture according to claim 1, characterized in that: The mounting block (15) has a sliding groove corresponding to each of the moving blocks (16). A stop block (32) is fixedly provided at the outer end of the sliding groove. One end of the first spring (19) is fixedly connected to the bottom of the mounting groove (18), and the other end is fixedly connected to the stop block (32).

5. The thickness precision and rapid inspection fixture according to claim 1, characterized in that: The compression column (21) has four sets of arc-shaped blocks evenly fixed on its body, and the arc-shaped blocks abut against the end face of the moving block (16).

6. The thickness precision and rapid inspection fixture according to claim 1, characterized in that: A fastening nut (7) is threaded onto one side of the slider (3), and the end of the fastening nut (7) can abut against the first slide rail (2) to lock the slider (3).

7. The thickness precision and rapid inspection fixture according to claim 1, characterized in that: The transmission pair between the first worm wheel (22) and the first worm (23) has a self-locking function, and the transmission pair between the second worm wheel (26) and the second worm (27) has a self-locking function.

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