A detection tool for the thickness of a workpiece

Abstract

The present invention provides a detection tool for the thickness of a workpiece, including a detection base plate. A detection groove is formed at the top of the detection base plate. The bottom of the detection groove is horizontal. A detection member is movably arranged in the detection groove. The bottom of the detection member is movably attached to the bottom of the detection groove, and the top is inclined. Moreover, the lower-height end of the top of the detection member is located between the higher-height end and the workpiece to be detected. An indicating member is arranged at the top of the detection member. A first indicating body and a second indicating body are arranged at the top of the detection base plate. Both the first indicating body and the second indicating body are located at the side of the indicating member. The detection tool for the thickness of a workpiece provided by the present invention can improve the detection efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of workpiece detection and relates to a detection tool for the thickness of a workpiece. Background Art

[0002] As the name implies, the thickness detection of a workpiece is to detect the thickness of the workpiece and determine whether the workpiece is qualified. For example, during the production of many automotive parts, it is necessary to detect the thickness of some workpieces.

[0003] Currently, there is a detection tool on the market for detecting the thickness of a workpiece, which includes a detection base plate. There are several thickness detection slots (for the part to be detected for thickness to enter) on the detection base plate and several quick clamps, and there is also a detection ruler with different thicknesses at both ends. The bottom of the detection ruler is flat, but the thicknesses of the tops at both ends are different. When detecting the bottom of the workpiece, first, the bottom (flat) of the workpiece is attached to the detection base plate, and then the workpiece is pressed tightly on the detection base plate using the quick clamps (the bottom of the workpiece is attached to the detection base plate). At this time, the part of the bottom of the workpiece to be detected for thickness is located in each detection slot. Then, the worker places the bottom of the detection ruler flat on the bottom of the detection slot, inserts the thinner end under the workpiece, and then takes out the detection ruler and rotates it horizontally by 180 degrees, and moves the thicker end of the detection ruler towards the bottom of the part of the workpiece to be detected. At this time, it is required that the detection ruler cannot be inserted under the part to be detected. That is, only when the distance between the bottom of the part to be detected and the bottom of the detection slot is greater than the thickness of one end of the detection ruler and less than the thickness of the other end of the detection ruler can it indicate that the thickness of the part to be detected here is qualified. However, this method requires using both ends of the detection ruler to detect the bottom of the part to be detected, resulting in low detection efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a detection tool for the thickness of a workpiece, aiming to solve the problem of low detection efficiency.

[0005] To solve the above technical problems, the present invention provides a detection tooling for the thickness of a workpiece, including a detection base plate. A detection groove is formed at the top of the detection base plate, and the bottom of the detection groove is horizontal. A detection member is movably arranged in the detection groove. The bottom of the detection member is movably attached to the bottom of the detection groove, and the top is inclined. Moreover, the lower end of the top of the detection member is located between the higher end and the workpiece to be detected. An indicating member is arranged at the top of the detection member. A first indicating body and a second indicating body are arranged at the top of the detection base plate. Both the first indicating body and the second indicating body are located at the side of the indicating member. When the top of the detection member abuts against the bottom of the workpiece to be detected, if the indicating member is located between the first indicating body and the second indicating body, it means that the thickness of the workpiece to be detected is qualified, otherwise it is unqualified.

[0006] The present invention is further configured such that both sides of the detection member are movably attached to the inner wall of the detection groove.

[0007] The present invention is further configured such that two movable holes are horizontally formed on the outer side of the detection member. Movable columns are movably arranged in the movable holes. An end of each of the two movable columns is provided with a movable block. Anti-detachment strips are arranged on both sides of the bottom of the movable block. The length direction of the anti-detachment strips is the same as the length direction of the detection groove. A matching groove matching with the anti-detachment strips is formed at the side of the detection groove. A first elastic member is arranged between the movable block and the detection member.

[0008] The present invention is further configured such that three detection grooves are formed. The bottom of the workpiece to be detected is rectangular. The three detection grooves are respectively located on the X side, -X side, and Y side of the workpiece to be detected.

[0009] The present invention is further configured such that four L-shaped limiting bodies are arranged at the top of the detection base plate. The four limiting bodies respectively fit against the outer sides of the four corners of the workpiece to be detected.

[0010] The present invention is further configured such that a support seat is arranged at the top of the detection base plate. A support rod is horizontally rotatably arranged on the support seat. One end of the support rod is provided with a linkage rod perpendicular to the support rod;

[0011] Two guide columns are vertically arranged at the top of the detection base plate. Guide cylinders are vertically and movably sleeved on the guide columns. A pressing plate is horizontally arranged between the two guide cylinders. A plurality of pressing columns are arranged at the bottom of the pressing plate. The middle of the linkage rod is hinged with a hinge arm. The top of the hinge arm is hinged with the side of the pressing plate. Rotating the linkage rod downward can drive the pressing plate to move downward through the hinge arm, and all the pressing columns are pressed against the top of the workpiece to be detected.

[0012] The present invention is further configured that an operating rod perpendicular to the linkage rod is provided at the outer end of the free end of the linkage rod, the clamping column comprises a cylindrical connecting portion and a cylindrical clamping portion, the top of the connecting portion is connected to the clamping plate, the inner wall of the bottom is provided with a first stabilizing ring, the top outer wall of the clamping portion is provided with a second stabilizing ring, the outer wall of the second stabilizing ring is movably fitted to the inner wall of the connecting portion, the outer wall of the clamping portion is movably fitted to the inner wall of the first stabilizing ring, and a second elastic member which is continuously in a compressed state is provided between the top of the clamping portion and the bottom of the clamping plate;

[0013] The outer wall of the support rod is provided with a driving column, the outer wall of the driving column includes a driving part and a smooth part, and the outer wall of the driving part is provided with a plurality of driving teeth;

[0014] A clearance hole is provided vertically through the detection base plate, and the clearance hole is located at the -Y side of the workpiece to be detected. A support portion with a U-shaped longitudinal section and an opening facing upward is horizontally provided at the bottom of the detection base plate, and a driving arm is provided horizontally and movably through the support portion, and the periphery of the driving arm is movably attached to the inner wall of the support portion and the lower side of the detection base plate, and a plurality of passive teeth that can be engaged with or separated from the driving teeth are provided on the top of the driving arm;

[0015] A vertical portion perpendicular to the driving arm is arranged at one end of the driving arm away from the passive tooth body, a same-direction portion perpendicular to the vertical portion is arranged on the vertical portion, a connecting portion is obliquely arranged at the free end of the vertical portion, a long strip-shaped connecting hole is obliquely opened vertically through the connecting portion, three long strip-shaped through holes are opened vertically through the detection bottom plate, a cylindrical connecting column is vertically arranged at the bottom of the detection member, two of the connecting columns are movably fitted to the inner walls of the two connecting holes respectively, and the bottom of the other connecting column is fixedly connected to the same-direction portion;

[0016] The driving column includes a first state, a second state and a third state;

[0017] When the driving column is in the first state, the passive tooth body and the driving tooth body are in a separated state, the first stabilizing ring and the second stabilizing ring are in a fitted state, and a height difference for placing the workpiece to be inspected is formed between the bottom of the pressing portion and the inspection bottom plate, and the two joint columns are located at the outermost ends of the corresponding joint holes;

[0018] When the driving column is in the second state, the pressing portion moves downward and contacts the top of the workpiece to be detected, the length of the second elastic member is S1, the passive tooth body and the driving tooth body are in a separated state, and the two joint columns are located at the outermost ends of the corresponding joint holes;

[0019] When the driving column is in the third state, both the connecting portion and the pressing plate continuously move downward. The length of the second elastic member is S2, where S2 < S1. The passive gear body and the driving gear body are in a meshing state. The inner walls of the two connecting holes respectively drive the two connecting columns to move towards the workpiece to be detected, and the same-direction portion drives the other connecting column to move towards the workpiece to be detected until the tops of all the detecting members are in contact with the bottom of the workpiece to be detected.

[0020] The present invention is further configured such that a third elastic member in a continuously compressed state is provided between the supporting portion and the bottom of the driving arm, and the third elastic member is located between the supporting portion and the passive gear body.

[0021] The present invention is further configured such that a fourth elastic member in a continuously compressed state is provided between the top of the detecting base plate and the bottom of the guiding cylinder.

[0022] The present invention is further configured such that the indicating member, the first indicating body, and the second indicating body are all in a convex or concave shape.

[0023] Compared with the prior art, the present invention provides a detecting tool for the thickness of a workpiece. When detecting a workpiece to be detected (not limited to a specific part, and it can also be understood that the structure of the present application can be used for any part that needs to detect the thickness), first, the bottom of the workpiece to be detected is attached to the top of the detecting base plate, and at the same time, the part of the workpiece to be detected with the thickness to be detected is located in the detecting groove; then, the detecting member is moved towards the workpiece to be detected, and during the movement, the bottom of the detecting member is kept in contact with the bottom of the detecting groove; until the top of the detecting member abuts against the workpiece to be detected (actually abuts against the part of the bottom of the workpiece to be detected with the thickness to be detected), observe the position of the indicating member at this time. If the indicating member is located between the first indicating body and the second indicating body at this time, it means that the thickness of the part of the workpiece to be detected with the thickness to be detected is in line; however, if the indicating member is located between the first indicating body, the second indicating body and the workpiece to be detected at this time, it means that the thickness of the part with the thickness to be detected is too small; and if both the first indicating body and the second indicating body are located between the indicating member and the workpiece to be detected at this time, it means that the thickness of the part with the thickness to be detected is too large. In this way, during the detection, the worker only needs to observe the position of the indicating member to make a judgment, and the operation is more convenient and efficient; the inclination degree of the top of the detecting member can be set according to the actual detection accuracy, and only for illustration in the figure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of an embodiment of a detecting tool for the thickness of a workpiece according to the present invention Figure 1 ;

[0025] Figure 2 isFigure 1 Enlarged view of part A;

[0026] Figure 3 is Figure 1 Enlarged view of part B;

[0027] Figure 4 Schematic diagram of a structure of an embodiment of a workpiece thickness detection tool of the present invention Figure 2 ;

[0028] Figure 5 is Figure 4 Enlarged view of part C;

[0029] Figure 6 is Figure 4 Enlarged view of part D;

[0030] Figure 7 Cross-section of an embodiment of a workpiece thickness detection tool of the present invention Figure 1 ;

[0031] Figure 8 is Figure 7 Enlarged view of part E;

[0032] Figure 9 Cross-section of an embodiment of a workpiece thickness detection tool of the present invention Figure 2 ;

[0033] Figure 10 is Figure 9 Enlarged view of part F;

[0034] Figure 11 Schematic diagram of an embodiment of the driving arm part of a workpiece thickness detection tool of the present invention;

[0035] Figure 12 is Figure 11 Enlarged view of part G.

[0036] Among them, 1. detection base plate; 2. detection groove; 3. detection member; 4. indicator; 5. first indicator; 6. second indicator; 7. movable column; 8. movable block; 9. anti-slip strip; 10. matching groove; 11. first elastic member; 12. limiter; 13. support seat; 14. support rod; 15. linkage rod; 16. guide column; 17. guide cylinder; 18. clamping plate; 19. clamping column; 19a. connecting part; 19b. clamping part; 20. hinge arm; 21, operating rod; 22, first stabilizing ring; 23, second stabilizing ring; 24, second elastic member; 25, driving column; 25a, driving part; 25b, smooth part; 26, driving tooth body; 27, clearance hole; 28, supporting part; 29, driving arm; 30, passive tooth body; 31, vertical part; 32, same direction part; 33, joint part; 34, joint hole; 35, through hole; 36, joint column; 37, third elastic member; 38, fourth elastic member. DETAILED DESCRIPTION

[0037] The following is a further detailed description of a workpiece thickness detection tool proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the accompanying drawings represent the same or similar components.

[0038] A workpiece thickness detection tool, such as Figures 1 to 12 As shown, it includes a detection base plate 1, a detection groove 2 is opened on the top of the detection base plate 1, the bottom of the detection groove 2 is horizontal, a detection piece 3 is movably arranged in the detection groove 2, the bottom of the detection piece 3 is movably fitted to the bottom of the detection groove 2, the top is inclined, and the lower end of the top of the detection piece 3 is located between the higher end and the workpiece to be detected (not the structure required to be protected in this application, and is only introduced here for auxiliary explanation), an indicator 4 is arranged on the top of the detection piece 3, a first indicator 5 and a second indicator 6 are arranged on the top of the detection base plate 1, the first indicator 5 and the second indicator 6 are both located on the side of the indicator 4, when the top of the detection piece 3 contacts the bottom of the workpiece to be detected, if the indicator 4 is located between the first indicator 5 and the second indicator 6, it indicates that the thickness of the workpiece to be detected is qualified, otherwise it is unqualified.

[0039] Both sides of the detection member 3 are movably attached to the inner wall of the detection slot 2 .

[0040] Two moving holes are horizontally formed on the outer side of the detecting member 3, and moving columns 7 are movably arranged in the moving holes. One moving block 8 is arranged at the outer ends of the two moving columns 7. Anti-detaching strips 9 are arranged on both sides of the bottom of the moving block 8. The length direction of the anti-detaching strips 9 is the same as that of the detecting groove 2. A matching groove 10 matching with the anti-detaching strip 9 is formed on the side of the detecting groove 2. A first elastic member 11 is arranged between the moving block 8 and the detecting member 3.

[0041] Three detecting grooves 2 are formed. The bottom of the workpiece to be detected is rectangular. The three detecting grooves 2 are respectively located on the X side, -X side and Y side of the workpiece to be detected.

[0042] Four L-shaped limiting bodies 12 are arranged on the top of the detecting bottom plate 1. The four limiting bodies 12 are respectively attached to the outer sides of the four corners of the workpiece to be detected.

[0043] A supporting seat 13 is arranged on the top of the detecting bottom plate 1. A supporting rod 14 is horizontally rotatably arranged on the supporting seat 13. One end of the supporting rod 14 is provided with a linkage rod 15 perpendicular to the supporting rod 14;

[0044] Two guiding columns 16 are vertically arranged on the top of the detecting bottom plate 1. A guiding cylinder 17 is vertically and movably sleeved on the guiding column 16. A pressing plate 18 is horizontally arranged between the two guiding cylinders 17. A plurality of pressing columns 19 are arranged at the bottom of the pressing plate 18. The middle part of the linkage rod 15 is hinged with a hinge arm 20. The top of the hinge arm 20 is hinged with the side of the pressing plate 18. Rotating the linkage rod 15 downward can drive the pressing plate 18 to move downward through the hinge arm 20, and all the pressing columns 19 are pressed on the top of the workpiece to be detected.

[0045] An operating rod 21 perpendicular to the linkage rod 15 is arranged at the outer end of the free end of the linkage rod 15. The pressing column 19 includes a cylindrical connecting part 19a and a cylindrical pressing part 19b. The top of the connecting part 19a is connected with the pressing plate 18. A first stabilizing ring 22 is arranged on the inner wall of the bottom. A second stabilizing ring 23 is arranged on the outer wall of the top of the pressing part 19b. The outer wall of the second stabilizing ring 23 is movably attached to the inner wall of the connecting part 19a. The outer wall of the pressing part 19b is movably attached to the inner wall of the first stabilizing ring 22. A second elastic member 24 in a continuously compressed state is arranged between the top of the pressing part 19b and the bottom of the pressing plate 18;

[0046] A driving column 25 is arranged on the outer wall of the supporting rod 14. The outer wall of the driving column 25 includes a driving part 25a and a smooth part 25b. A plurality of driving teeth 26 are arranged on the outer wall of the driving part 25a;

[0047] A relief hole 27 is vertically formed through the detection base plate 1. The relief hole 27 is located on the -Y side of the workpiece to be detected. A support portion 28 with a U-shaped longitudinal section opening upward is horizontally arranged at the bottom of the detection base plate 1. A driving arm 29 is horizontally movably arranged through the support portion 28. The periphery of the driving arm 29 is movably attached to the inner wall of the support portion 28 and the lower side of the detection base plate 1. A plurality of passive teeth 30 that can be engaged with or separated from the driving teeth 26 are arranged at the top of the driving arm 29;

[0048] One end of the driving arm 29 away from the passive teeth 30 is provided with a vertical portion 31 perpendicular to the driving arm 29. A same-direction portion 32 perpendicular to the vertical portion 31 is arranged on the vertical portion 31. A connecting portion 33 is obliquely arranged at the free end of the vertical portion 31. A long strip-shaped connecting hole 34 is obliquely formed through the connecting portion 33 vertically. Three long strip-shaped through holes 35 are vertically formed through the detection base plate 1. A cylindrical connecting column 36 is vertically arranged at the bottom of the detection member 3. Two of the connecting columns 36 are respectively movably attached to the inner walls of the two connecting holes 34, and the bottom of the other connecting column 36 is fixedly connected to the same-direction portion 32;

[0049] The driving column 25 includes a first state, a second state, and a third state;

[0050] When the driving column 25 is in the first state, the passive teeth 30 and the driving teeth 26 are in a separated state, the first stable ring 22 and the second stable ring 23 are in a fitting state, and a height difference for placing and taking the workpiece to be detected is formed between the bottom of the pressing portion 19b and the detection base plate 1. The two connecting columns 36 are located at the outermost ends of the corresponding connecting holes 34;

[0051] When the driving column 25 is in the second state, the pressing portion 19b moves downward and abuts against the top of the workpiece to be detected. The length of the second elastic member 24 is S1. The passive teeth 30 and the driving teeth 26 are in a separated state. The two connecting columns 36 are located at the outermost ends of the corresponding connecting holes 34;

[0052] When the driving column 25 is in the third state, the connecting portion 19a and the pressing plate 18 both continue to move downward. The length of the second elastic member 24 is S2, where S2 < S1. The passive teeth 30 and the driving teeth 26 are in an engaged state. The inner walls of the two connecting holes 34 respectively drive the two connecting columns 36 to move towards the workpiece to be detected, and the same-direction portion 32 drives the other connecting column 36 to move towards the workpiece to be detected until the tops of all the detection members 3 are in contact with the bottom of the workpiece to be detected.

[0053] A third elastic member 37 in a continuously compressed state is provided between the supporting portion 28 and the bottom of the driving arm 29, and the third elastic member 37 is located between the supporting portion 28 and the passive gear body 30.

[0054] A fourth elastic member 38 in a continuously compressed state is provided between the top of the detection bottom plate 1 and the bottom of the guide cylinder 17. The indicating member 4, the first indicating body 5, and the second indicating body 6 are all in a convex or concave shape.

[0055] When detecting a workpiece to be detected (not limited to a specific part, and it can also be understood that the structure of the present application can be used for any part that needs to detect the thickness), first, the bottom of the workpiece to be detected is attached to the top of the detection bottom plate 1, and at the same time, the part of the workpiece to be detected with the thickness to be detected is located in the detection groove 2; then the detection member 3 is moved towards the workpiece to be detected, and during the movement, the bottom of the detection member 3 is kept attached to the bottom of the detection groove 2; until the top of the detection member 3 touches the workpiece to be detected (actually touches the part of the bottom of the workpiece to be detected with the thickness to be detected), observe the position of the indicating member 4 at this time. If the indicating member 4 is located between the first indicating body 5 and the second indicating body 6 at this time, it means that the thickness of the part of the workpiece to be detected with the thickness to be detected is qualified. However, if the indicating member 4 is located between the first indicating body 5, the second indicating body 6 and the workpiece to be detected at this time, it means that the thickness of the part with the thickness to be detected is too small; and if both the first indicating body 5 and the second indicating body 6 are located between the indicating member 4 and the workpiece to be detected at this time, it means that the thickness of the part with the thickness to be detected is too large. In this way, during the detection, the worker only needs to observe the position of the indicating member 4 to make a judgment, and the operation is more convenient and efficient; the inclination degree of the top of the detection member 3 can be set according to the actual detection accuracy, and only a schematic diagram is shown in the figure.

[0056] During actual operation, first, under the elastic force of the fourth elastic member 38, the pressing plate 18 is at the highest height, and at this time, the pressing column 19 is higher than the detection bottom plate 1. In this way, the worker can directly place the workpiece on the detection bottom plate 1, and limit the detection bottom plate 1 through the four limit bodies 12; then the operating rod 21 is rotated downward, the operating rod 21 drives the linkage rod 15 to move, and the linkage rod 15 drives the pressing plate 18 downward through the hinge arm 20 until the pressing portion 19b touches the top of the workpiece to be detected; then the operating rod 21 is continuously rotated downward, so that the second elastic member 24 is further compressed, thereby further pressing the workpiece to be detected;

[0057] When a certain node of the rotating linkage rod 15 is rotated, the driving tooth body 26 meshes with the driven tooth body 30, and drives the driving arm 29 to move away from the workpiece to be detected. While the driving arm 29 is moving, it drives the moving block 8 on the Y side to move through the same-direction part 32, and at the same time drives the two connecting columns 36 to move towards each other through the two inclined connecting holes 34, that is, drives the two moving blocks 8 on the X side and the -X side to move towards the workpiece to be detected. The moving block 8 drives the detecting member 3 to move through the first elastic member 11 until the upper sides of all the detecting members 3 abut against the part to be detected for the thickness at the bottom of the workpiece to be detected. Finally, observe the positions of all the indicating members 4. If all the indicating members 4 are between the corresponding first indicating body 5 and the second indicating body 6, it means that the workpiece to be detected is qualified, otherwise it is unqualified. Since all the moving blocks 8 drive the corresponding detecting members 3 to move through the first elastic member 11, even if one of the detecting members 3 abuts against the bottom of the workpiece to be detected, the other two detecting members 3 can still move normally, that is, the movements of the three detecting members 3 do not affect each other. During the continuous downward rotation of the linkage rod 15, the workpiece to be detected can be fully pressed to prevent it from being lifted, ensuring the smooth progress of the detection.

[0058] In this way, by simply rotating an operating rod 21, the pressing of the workpiece to be detected and the thickness detection of three sides of the workpiece to be detected can be completed. Finally, by simply observing the positions of the three indicating members 4, it can be judged whether the thickness of the workpiece to be detected is qualified. The operation convenience is high, and the detection efficiency is greatly improved.

[0059] After the detection of a workpiece to be detected is completed, just loosen the operating rod 21. At this time, under the elastic force of the fourth elastic member 38, the guide cylinder 17 (with a relatively large length) moves upward until it abuts against the anti-disengagement part at the top of the guide post 16. During the rising process of the pressing plate 18, first, it drives the driven tooth body 30 to move through the driving tooth body 26, so as to drive all the moving blocks 8 away from the workpiece to be detected. The moving block 8 also pulls the corresponding detecting member 3 outward through the first elastic member 11.

[0060] When the driving tooth body 26 is separated from the driven tooth body 30, at this time, under the pushing action of the elastic force of the third elastic member 37, the driving arm 29 moves to the limit position, and at this position, the driven tooth body 30 can smoothly wait to mesh with the driving tooth body 26 next time.

[0061] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure are within the protection scope of the claims.

Claims

1. A tool for detecting the thickness of a workpiece, characterized in that: The invention comprises a detection base plate (1), a detection groove (2) is provided on the top of the detection base plate (1), the bottom of the detection groove (2) is horizontal, a detection member (3) is movably arranged in the detection groove (2), the bottom of the detection member (3) is movably fitted to the bottom of the detection groove (2), the top is inclined, and the lower end of the top of the detection member (3) is located between the higher end and the workpiece to be detected, an indicator member (4) is arranged on the top of the detection member (3), a first indicator body (5) and a second indicator body (6) are arranged on the top of the detection base plate (1), the first indicator body (5) and the second indicator body (6) are both located on the side of the indicator member (4), when the top of the detection member (3) contacts the bottom of the workpiece to be detected, if the indicator member (4) is located between the first indicator body (5) and the second indicator body (6), it indicates that the thickness of the workpiece to be detected is qualified, otherwise it is unqualified; A clearance hole (27) is vertically penetrated through the detection base plate (1), and the clearance hole (27) is located at the -Y side of the workpiece to be detected. A support portion (28) with a U-shaped longitudinal section and an opening facing upward is horizontally arranged at the bottom of the detection base plate (1). A driving arm (29) is horizontally movably arranged through the support portion (28). The periphery of the driving arm (29) is movably attached to the inner wall of the support portion (28) and the lower side of the detection base plate (1). A plurality of passive teeth (30) that can mesh with or separate from the driving teeth (26) are arranged at the top of the driving arm (29); A vertical portion (31) perpendicular to the driving arm (29) is arranged at one end of the driving arm (29) away from the passive tooth body (30); a same-direction portion (32) perpendicular to the vertical portion (31) is arranged on the vertical portion (31); a connecting portion (33) is obliquely arranged at the free end of the vertical portion (31); a long strip-shaped connecting hole (34) is obliquely opened vertically through the connecting portion (33); three long strip-shaped through holes (35) are opened vertically through the detection base plate (1); a cylindrical connecting column (36) is vertically arranged at the bottom of the detection member (3), wherein two of the connecting columns (36) are movably fitted to the inner walls of the two connecting holes (34) respectively, and the bottom of the other connecting column (36) is fixedly connected to the same-direction portion (32).

2. A workpiece thickness detection tool according to claim 1, characterized in that: Both sides of the detection member (3) are movably fitted to the inner wall of the detection groove (2).

3. A workpiece thickness detection tool according to claim 1 or 2, characterized in that: Two movable holes are horizontally provided on the outer side of the detection member (3), and movable columns (7) are movably provided in the movable holes. A movable block (8) is provided at the outer end of the two movable columns (7), and anti-slipping strips (9) are provided on both sides of the bottom of the movable block (8). The length direction of the anti-slipping strip (9) is in the same direction as the length direction of the detection slot (2). A matching groove (10) matching with the anti-slipping strip (9) is provided on the side of the detection slot (2), and a first elastic member (11) is provided between the movable block (8) and the detection member (3).

4. A workpiece thickness detection tool according to claim 3, characterized in that: Three detection grooves (2) are provided, the bottom of the workpiece to be detected is rectangular, and the three detection grooves (2) are respectively located on the X side, the -X side and the Y side of the workpiece to be detected.

5. A workpiece thickness detection tool according to claim 4, characterized in that: Four L-shaped limiting bodies (12) are arranged on the top of the detection base plate (1), and the four limiting bodies (12) are respectively attached to the outer sides of the four corners of the workpiece to be detected.

6. A workpiece thickness detection tool according to claim 5, characterized in that: A support seat (13) is arranged on the top of the detection base plate (1), a support rod (14) is arranged on the support seat (13) for horizontal rotation, and a linkage rod (15) perpendicular to the support rod (14) is arranged at one end of the support rod (14); two guide columns (16) are also arranged vertically on the top of the detection base plate (1), a guide cylinder (17) is vertically movably sleeved on the guide column (16), and a horizontal guide cylinder (17) is arranged between the two guide cylinders (17). There is a clamping plate (18), and a plurality of clamping columns (19) are arranged at the bottom of the clamping plate (18). A hinged arm (20) is hingedly arranged in the middle of the linkage rod (15), and the top of the hinged arm (20) is hingedly connected to the side of the clamping plate (18). When the linkage rod (15) is rotated downward, the clamping plate (18) can be driven to move downward through the hinged arm (20), and all the clamping columns (19) are pressed against the top of the workpiece to be inspected.

7. A workpiece thickness detection tool according to claim 6, characterized in that: The outer end of the free end of the linkage rod (15) is provided with an operating rod (21) perpendicular to the linkage rod (15); the clamping column (19) comprises a cylindrical connecting portion (19a) and a cylindrical clamping portion (19b); the top of the connecting portion (19a) is connected to the clamping plate (18); the inner wall of the bottom is provided with a first stabilizing ring (22); the outer wall of the top of the clamping portion (19b) is provided with a second stabilizing ring (23); the outer wall of the second stabilizing ring (23) is movably fitted to the inner wall of the connecting portion (19a); the outer wall of the clamping portion (19b) is movably fitted to the inner wall of the first stabilizing ring (22); a second elastic member (24) which is continuously in a compressed state is provided between the top of the clamping portion (19b) and the bottom of the clamping plate (18); The outer wall of the support rod (14) is provided with a driving column (25), the outer wall of the driving column (25) includes a driving portion (25a) and a smooth portion (25b), and the outer wall of the driving portion (25a) is provided with a plurality of driving teeth (26); The driving column (25) includes a first state, a second state and a third state; When the driving column (25) is in the first state, the passive tooth body (30) and the driving tooth body (26) are in a separated state, the first stabilizing ring (22) and the second stabilizing ring (23) are in a fitted state, and a height difference for placing a workpiece to be inspected is formed between the bottom of the pressing portion (19b) and the inspection base plate (1), and the two joint columns (36) are located at the outermost ends of the corresponding joint holes (34); When the driving column (25) is in the second state, the pressing portion (19b) moves downward and contacts the top of the workpiece to be detected, the length of the second elastic member (24) is S1, the passive tooth body (30) and the driving tooth body (26) are in a separated state, and the two joint columns (36) are located at the outermost ends of the corresponding joint holes (34); When the driving column (25) is in the third state, the connecting portion (19a) and the clamping plate (18) both continue to move downward, the length of the second elastic member (24) is S2, wherein S2 < S1, the passive tooth body (30) and the driving tooth body (26) are in a meshing state, the inner walls of the two associated holes (34) respectively drive the two associated columns (36) to move toward the workpiece to be detected, and the unidirectional portion (32) drives the other associated column to move toward the workpiece to be detected until the tops of all the detection members (3) are in contact with the bottoms of the workpieces to be detected.

8. A workpiece thickness detection tool according to claim 7, characterized in that: A third elastic member (37) which is continuously in a compressed state is provided between the support portion (28) and the bottom of the driving arm (29); the third elastic member (37) is located between the support portion (28) and the passive tooth body (30).

9. A workpiece thickness detection tool according to claim 7, characterized in that: A fourth elastic member (38) which is continuously in a compressed state is arranged between the top of the detection base plate (1) and the bottom of the guide cylinder (17).

10. A workpiece thickness detection tool according to claim 1, characterized in that: The indicator (4), the first indicator body (5) and the second indicator body (6) are all convex or concave.

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