Coating thickness gauge

Abstract

The invention relates to a coating thickness gauge, and belongs to the technical field of coating thickness gauges. A hinge rod and an adsorption plate are arranged, the adsorption plate is firstly controlled to be adsorbed on a vehicle body, and then the hinge angle between the hinge rod and a measuring circular platform is adjusted, so that the measuring circular platform is vertically arranged; it is ensured that the measuring end of the measuring device arranged on the measuring circular platform can be vertically arranged on the central axis of the vehicle body, accurate measurement of the thickness of the vehicle body coating by the measuring device is achieved, and the problem that an existing coating thickness gauge achieves data measurement on the flat ground is solved; when the thickness of a coating of a vehicle body with a curved surface is measured, the problem that the measuring end of the thickness gauge is not perpendicular to the vehicle body with the curved surface due to the fact that the position of the thickness gauge cannot be well adjusted exists, so that the measured data of the thickness gauge is not accurate enough is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of coating thickness gauges, and in particular relates to a coating thickness gauge. Background Art

[0002] Coating is a solid continuous film obtained by applying the paint once, which plays a protective, insulating and decorative role. Coating thickness gauge is an instrument used to measure coating thickness. It has the characteristics of small measurement error, high reliability, good stability and easy operation. It is an indispensable testing instrument for controlling and ensuring product quality. It is widely used in manufacturing, chemical industry, commodity inspection and other testing fields.

[0003] For example, the utility model patent with patent authorization announcement number: CN213657823U discloses a coating thickness gauge for detecting the thickness of non-metallic coatings, including a coating thickness gauge body, a regulating component is provided on the coating thickness gauge body, a round table is sleeved on the outer wall of the coating thickness gauge body, the coating thickness gauge body is slidably connected to the round table, and two symmetrically arranged inclined rods are fixedly installed at the lower end of the round table, and the lower ends of the two inclined rods are inlaid with supporting feet.

[0004] Based on the search of the above patents and the shortcomings found therein:

[0005] Existing coating thickness gauges all measure data on flat ground. When measuring coating thickness on a curved car body, the thickness gauge may not be able to adjust its position properly, resulting in the measuring end of the thickness gauge not being perpendicular to the curved car body, which in turn causes the thickness gauge measurement data to be inaccurate. Summary of the invention

[0006] In order to solve the problem that existing coating thickness gauges all measure data on flat ground; when measuring the coating thickness of a car body with a curved surface, the thickness gauge may be unable to adjust its position, resulting in the measuring end of the thickness gauge not being perpendicular to the curved surface of the car body, thereby causing the thickness gauge measurement data to be inaccurate, the present invention provides a coating thickness gauge.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A coating thickness gauge comprises a measuring circular platform, a measuring device, a plurality of hinged rods and a plurality of adsorption components, wherein the plurality of hinged rods are arranged at equal angles around the central axis of the measuring circular platform, the plurality of adsorption components are matched with the plurality of hinged rods in a one-to-one manner, the adsorption components comprise adsorption plates, the two ends of any of the hinged rods are respectively hingedly arranged with the measuring circular platform and the corresponding adsorption plate, the adsorption plate is used to be adsorbed on the surface of a vehicle body, the measuring device is centrally arranged on the side wall of the measuring circular platform, and the measuring end of the measuring device is arranged perpendicular to the measuring circular platform.

[0009] As a preferred technical solution of the present invention, the adsorption assembly also includes a suction nozzle, an air pipe and an air pump. The air pump is arranged on the top surface of the measuring circular platform, the suction nozzle is arranged on the side wall of the adsorption plate that is in contact with the surface of the vehicle body, and the two ends of the air pipe are respectively connected to the output end of the air pump and the suction nozzle.

[0010] As a preferred technical solution of the present invention, it also includes a positioning nozzle and a positioning rod, the bottom end of the positioning rod is coaxially connected to the positioning nozzle, the top end of the positioning rod is rotatably coaxially arranged on the bottom end of the measuring circular platform, the axial direction of the positioning rod and the bottom surface of the measuring circular platform are perpendicular to each other, and the positioning nozzle is used to fit the surface of the vehicle body.

[0011] As a preferred technical solution of the present invention, there is a constant distance between the measuring end of the measuring device and the positioning nozzle.

[0012] As a preferred technical solution of the present invention, it also includes a driving component, which includes a driving shaft, a sliding block and a plurality of driving rods. The driving shaft coaxially passes through the center of the measuring circular platform, the bottom end of the driving shaft is rotatably connected to the positioning rod coaxially, the sliding block is slidably connected to the driving shaft coaxially, the sliding block is located between the measuring circular platform and the positioning rod, a plurality of driving rods are matched with a plurality of articulated rods one by one, and the two ends of any driving rod are respectively hinged to the sliding block and the corresponding articulated rod.

[0013] As a preferred technical solution of the present invention, the central axis of the driving rod, the central axis of the corresponding hinged rod and the central axis of the corresponding adsorption plate are in the same plane.

[0014] As a preferred technical solution of the present invention, there are four hinged rods in total.

[0015] As a preferred technical solution of the present invention, it also includes a pressing assembly, the driving shaft includes a driving roller, a rotating roller and a control roller which are relatively rotatable and coaxially arranged with each other in sequence, the rotating roller is coaxially connected to the measuring circular platform, the other end of the driving roller is coaxially connected to the positioning rod which is relatively rotatable, the rotating roller, the driving roller and the control roller jointly form a connecting groove, the pressing assembly includes a pressing rod, a control part, a pressing output rod and a plurality of connecting units, the control part is arranged in the connecting groove of the control roller, the control part is provided with an output port and an input port, the pressing rod is arranged on the input port of the control part, the pressing output rod is connected with the output port of the control part, the pressing rod is exposed outside the connecting groove, when the pressing rod presses the control part for the first time, the control part controls the pressing output rod to retract into the output port of the control part; when the pressing rod presses the control part again, the control part controls the pressing output rod to extend out of the output port of the control part; the central axis direction of the pressing output rod coincides with the central axis direction of the driving shaft;

[0016] A plurality of connection units are arranged at equal angles around the central axis of the pressing output rod at one end of the pressing output rod away from the control part; the connection unit includes a connecting rod and a connecting block, the two ends of the connecting rod are respectively connected to the connecting block and one end of the pressing output rod, the central axis of the connecting rod and the central axis of the driving roller are arranged parallel to each other, the connecting block is slidably arranged on the inner wall of the driving shaft, and the connecting block can lock or release its abutting and fitting relationship with the driving roller.

[0017] As a preferred technical solution of the present invention, the moving length of the pressing output rod is greater than the length of the connecting block.

[0018] As a preferred technical solution of the present invention, it also includes an auxiliary positioning nozzle, a movable rod and an internally hollow fixed rod. The movable rod can be slidably arranged in one end of the fixed rod, and the other end of the fixed rod is connected to the bottom surface of the measuring circular platform. The auxiliary positioning nozzle is connected to the other end of the movable rod, and the auxiliary positioning nozzle can lock or release its fitting relationship with the side wall of the vehicle body.

[0019] The beneficial effects of the present invention are:

[0020] This solution is provided with an articulated rod and an adsorption plate. First, the adsorption plate is controlled to be adsorbed on the vehicle body, and then the articulation angle between the articulated rod and the measuring circular platform is adjusted so that the measuring circular platform is vertically arranged, ensuring that the measuring end of the measuring device arranged on the measuring circular platform can be vertically arranged on the central axis of the vehicle body, so as to realize accurate measurement of the coating thickness of the vehicle body by the measuring device, thereby solving the problem that the existing coating thickness gauges all realize measurement data on flat ground; when measuring the coating thickness of a vehicle body with a curved surface, there is a situation where the thickness gauge cannot adjust the position properly, resulting in the measuring end of the thickness gauge not being perpendicular to the curved surface of the vehicle body, thereby causing the problem that the measurement data of the thickness gauge is not accurate enough. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is an overall diagram of a coating thickness gauge of the present invention;

[0023] Figure 2 A front view of a coating thickness gauge of the present invention;

[0024] Figure 3 A bottom view of a coating thickness gauge of the present invention;

[0025] Figure 4 The present invention is a schematic structural diagram of a pressing assembly and a driving shaft of a coating thickness gauge.

[0026] Description of main symbols

[0027] In the figure: 1. Measuring circular platform; 2. Measuring device; 3. Articulated rod; 4. Adsorption assembly; 401. Suction nozzle; 402. Air pump; 403. Adsorption plate; 5. Positioning nozzle; 6. Positioning rod; 7. Driving assembly; 701. Driving shaft; 7011. Driving roller; 7012. Rotating roller; 7013. Control roller; 702. Sliding block; 703. Driving rod; 8. Pressing assembly; 801. Pressing rod; 802. Control unit; 803. Pressing output rod; 804. Connecting rod; 805. Connecting block; 9. Auxiliary positioning nozzle; 10. Moving rod; 11. Fixed rod. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] See also Figure 1-4The present embodiment provides a coating thickness gauge, comprising a measuring circular platform 1, a measuring device 2, a plurality of hinged rods 3 and a plurality of adsorption components 4, wherein the plurality of hinged rods 3 are arranged at equal angles around the central axis of the measuring circular platform 1, the plurality of adsorption components 4 are matched with the plurality of hinged rods 3 in a one-to-one correspondence, the adsorption components 4 include adsorption plates 403, the two ends of any hinged rod 3 are respectively hingedly arranged with the measuring circular platform 1 and the corresponding adsorption plates 403, the adsorption plates 403 are used to be adsorbed on the surface of the vehicle body, the measuring device 2 is centrally arranged on the side wall of the measuring circular platform 1, and the measuring end of the measuring device 2 is arranged vertically with the measuring circular platform 1; the present scheme is provided with the hinged rods 3 and the adsorption components 403, and the adsorption components 403 are matched with the hinged rods 3 in a one-to-one correspondence, the adsorption components 4 include adsorption plates 403, the two ends of any hinged rod 3 are respectively hingedly arranged with the measuring circular platform 1 and the corresponding adsorption plates 403, the adsorption plates 403 are used to be adsorbed on the surface of the vehicle body, the measuring device 2 is centrally arranged on the side wall of the measuring circular platform 1, and the measuring end of the measuring device 2 is arranged vertically with the measuring circular platform 1; Plate 403, first control the adsorption plate 403 to be adsorbed on the vehicle body, and then adjust the hinge angle between the hinge rod 3 and the measuring circular platform 1, so that the measuring circular platform 1 is set vertically, ensuring that the measuring end of the measuring device 2 set on the measuring circular platform 1 can be vertically set on the central axis of the vehicle body, so as to realize the accurate measurement of the coating thickness of the vehicle body by the measuring device 2, and solve the problem that the existing coating thickness gauges all realize the measurement data on the flat ground; when measuring the coating thickness of the vehicle body with a curved surface, there will be a situation where the thickness gauge cannot adjust the position, resulting in the measuring end of the thickness gauge not being perpendicular to the curved surface of the vehicle body, thereby causing the problem that the measurement data of the thickness gauge is not accurate enough.

[0030] Specifically, the adsorption component 4 of the present scheme also includes a suction nozzle 401, an air pipe 402 and an air pump 402. The air pump 402 is arranged on the top surface of the measuring circular platform 1, and the suction nozzle 401 is arranged on the side wall of the adsorption plate 403 that is in contact with the surface of the vehicle body. The two ends of the air pipe 402 are respectively connected with the output end of the air pump 402 and the suction nozzle 401; the air pump 402 starts working, so that the suction nozzle 401 has a negative pressure effect, and the suction nozzle 401 is arranged in contact with the side wall of the vehicle body, so that the adsorption plate 403 is in contact with the side wall of the vehicle body, thereby realizing that the coating thickness gauge of the present scheme can be adsorbed on the side wall of the vehicle body.

[0031] In addition, when the suction nozzle 401 has not been adsorbed on the side wall of the vehicle body, the operator needs to manually adjust and manually fit the suction nozzle 401 to the side wall of the vehicle body. In order to facilitate the operator to operate manually alone, the present solution also includes a positioning nozzle 5 and a positioning rod 6. The bottom end of the positioning rod 6 is coaxially connected to the positioning nozzle 5, and the top end of the positioning rod 6 is rotatably coaxially arranged on the bottom end of the measuring circular platform 1. The axial direction of the positioning rod 6 and the bottom surface of the measuring circular platform 1 are perpendicular to each other. The positioning nozzle 5 is used to fit the surface of the vehicle body; by setting the positioning nozzle 5, the operator first picks up the entire thickness gauge and fits the positioning nozzle 5 on the surface of the vehicle body to achieve the initial fit of the thickness gauge on the side wall of the vehicle body, and then rotates the measuring circular platform 1, adjusts the position of the measuring circular platform 1, and manually adjusts the suction nozzle 401 to adsorb on the side wall of the vehicle body.

[0032] In addition, it should be noted that the positioning nozzle 5 of the present solution not only facilitates the operator to achieve the effect of initially fitting the thickness gauge on the side wall of the vehicle body, but also ensures that there is always a certain distance between the measuring end of the measuring device 2 and the positioning nozzle 5, thereby always maintaining a certain distance between the measuring end of the measuring device 2 and the side wall of the vehicle body. Such a setting can further improve the measurement accuracy of the thickness gauge of the present solution.

[0033] Furthermore, in order to simultaneously control the synchronous movement of the articulated rods 3 of the present invention, and also to ensure that the articulation angles between each articulated rod 3 and the measuring circular platform 1 are the same, the present invention further includes a driving assembly 7, which includes a driving shaft 701, a sliding block 702 and a plurality of driving rods 703. The driving shaft 701 coaxially passes through the center of the measuring circular platform 1, and the bottom end of the driving shaft 701 is rotatably connected to the positioning rod 6 coaxially. The sliding block 702 is slidably connected to the driving shaft 701 coaxially. The sliding block 702 is located between the measuring circular platform 1 and the positioning rod 6. The plurality of driving rods 703 are matched one-to-one with the plurality of articulated rods 3, and the two ends of any driving rod 703 are They are respectively hinged with the sliding block 702 and the corresponding articulated rod 3. In this solution, the driving shaft 701 is controlled to rotate, thereby realizing the sliding of the sliding block 702 on the driving shaft 701. As the sliding block 702 slides, the articulation angle between the sliding block 702 and the driving rod 703 will constantly change. Since the driving rod 703 and the articulated rod 3 are mutually articulated, the articulation angle between the articulated rod 3 and the measuring circular platform 1 is controlled. Since the articulation angles between each driving rod 703 and the articulated rod 3 are the same at the beginning, the sliding of the sliding block 702 can synchronously control the articulation angles between each articulated rod 3 and the measuring circular platform 1. It is worth noting that in order to ensure that the sliding block 702 of this solution can synchronously control the articulation angles between each articulated rod 3 and the measuring circular platform 1, the central axis of the driving rod 703 of this solution, the central axis of the corresponding articulated rod 3, and the central axis of the corresponding adsorption plate 403 are always in the same plane.

[0034] In addition, it is worth noting that since the plurality of articulated rods 3 of the present solution are arranged at equal angles around the central axis of the measuring circular platform 1, and according to the above embodiment, the driving assembly 7 will simultaneously control the articulation angles between each articulated rod 3 and the measuring circular platform 1; therefore, in order to ensure the normal operation of the device of the present solution, the number of articulated rods 3 of the present solution is set to four in total. It is also necessary to specifically explain that the four articulated rods 3 are all arranged at an angle relative to the vertical line and the horizontal line, and the two adjacent articulated rods 3 are arranged symmetrically relative to the vertical line or the horizontal line.

[0035] Furthermore, the present invention is also provided with a pressing assembly 8, wherein the driving shaft 701 comprises a driving roller 7011, a rotating roller 7012 and a control roller 7013 which are relatively rotatable and coaxially arranged with each other in sequence, the rotating roller 7012 is coaxially connected to the measuring circular platform 1, and the other end of the driving roller 7011 is coaxially connected to the positioning rod 6 so as to be relatively rotatable, the rotating roller 7012, the driving roller 7011 and the control roller 7013 jointly form a connecting groove, and the pressing assembly 8 comprises a pressing rod 801, a control unit 802, a pressing output rod 803 and a plurality of connecting units, the control unit 802 is arranged in the connecting groove of the control roller 7013, the control unit 802 is provided with an output port and an input port, the pressing rod 801 is arranged on the input port of the control unit 802, and the pressing output rod 803 is connected to the control unit 801. The output port of the control part 802 is connected, and the pressing rod 801 is exposed outside the connecting groove. When the pressing rod 801 presses the control part 802 for the first time, the control part 802 controls the pressing output rod 803 to retract into the output port of the control part 802; when the pressing rod 801 presses the control part 802 again, the control part 802 controls the pressing output rod 803 to extend out of the output port of the control part 802; it should be noted that the control part 802 of this scheme can be understood as the control structure of the press-type automatic pen set in the pen shell, the pressing rod 801 can be understood as the pen cap, and the pressing output rod 803 can be understood as the pen core; when the pen cap presses the control structure for the first time, the control structure will control the pen core to retract into the pen shell; when the pen cap presses the control structure again, the control structure will control the pen core to extend out of the pen shell. It is also worth noting that the central axis direction of the pressing output rod 803 of this scheme coincides with the central axis direction of the driving shaft 701. In addition, the connecting unit of the present embodiment is arranged at an equal angle around the central axis of the pressing output rod 803 at the end of the pressing output rod 803 away from the control unit 802; the connecting unit includes a connecting rod 804 and a connecting block 805, the two ends of the connecting rod 804 are respectively connected to the connecting block 805 and one end of the pressing output rod 803, the central axis of the connecting rod 804 and the central axis of the driving roller 7011 are arranged parallel to each other, the connecting block 805 is slidably arranged on the inner wall of the driving shaft 701, and the connecting block 805 can lock or release its abutting and fitting relationship with the driving roller 7011 or the rotating roller 7012.

[0036] Through such a setting, when the pressing rod 801 presses the control part 802 for the first time, the control part 802 will control the pressing output rod 803 to retract into the output port of the control part 802, so that the connecting block 805 connected to the pressing output rod 803 moves in the direction close to the control part 802, and the connecting block 805 moves to the rotating roller 7012. At this time, the driving control roller 7013 is rotated, which can drive the rotating roller 7012 to rotate, thereby driving the measuring circular platform 1 connected to the rotating roller 7012 to rotate. It should be noted that when the measuring circular platform 1 of this scheme rotates, the sliding block 702 will rotate relative to the driving roller 7011, and the sliding block 702 slides at the position of the driving roller 7011, thereby adjusting the position of the measuring circular platform 1.

[0037] Then, when the pressing rod 801 presses the control part 802 again, the control part 802 will control the pressing output rod 803 to extend out of the output port of the control part 802, so that the connecting block 805 connected to the pressing output rod 803 moves in a direction away from the control part 802, and the connecting block 805 moves to the driving roller 7011. At this time, the driving control roller 7013 rotates, which can drive the driving roller 7011 to rotate, thereby driving the sliding block 702 to slide on the driving roller 7011, so that the suction nozzle 401 is adsorbed on the side wall of the vehicle body.

[0038] It is worth noting that in order to ensure the normal operation of the device, the moving length of the pressing output rod 803 in this solution is greater than the length of the connecting block 805. This setting can ensure that the connecting block 805 can only be located on the inner wall of the rotating roller 7012 or the inner wall of the driving roller 7011.

[0039] In addition, in order to ensure that when the control roller 7013 controls the driving roller 7011 to rotate, the rotating roller 7012 remains stationary, the present solution also includes an auxiliary positioning nozzle 9, a movable rod 10 and an internally hollow fixed rod 11. The movable rod 10 can be slidably arranged in one end of the fixed rod 11, and the other end of the fixed rod 11 is connected to the bottom surface of the measuring circular platform 1. The auxiliary positioning nozzle 9 is connected to the other end of the movable rod 10. The auxiliary positioning nozzle 9 can lock or release its fitting relationship with the side wall of the vehicle body. When the measuring circular platform 1 completes the position adjustment, by pulling the auxiliary positioning nozzle 9 to fit the vehicle body, it can be ensured that the measuring circular platform 1 will not rotate, thereby ensuring that when the control roller 7013 controls the driving roller 7011 to rotate, the rotating roller 7012 can remain stationary.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A coating thickness gauge, characterized in that: It includes a measuring circular platform, a measuring device, a plurality of hinged rods and a plurality of adsorption components. The plurality of hinged rods are arranged at equal angles around the central axis of the measuring circular platform. The plurality of adsorption components are matched with the plurality of hinged rods one by one. The adsorption components include adsorption plates. The two ends of any hinged rod are respectively hinged to the measuring circular platform and the corresponding adsorption plate. The adsorption plate is used to be adsorbed on the surface of the vehicle body. The measuring device is centrally arranged on the side wall of the measuring circular platform. The measuring end of the measuring device is arranged perpendicular to the measuring circular platform.

2. A coating thickness gauge according to claim 1, characterized in that: The adsorption assembly also includes a suction nozzle, an air pipe and an air pump. The air pump is arranged on the top surface of the measuring circular platform, the suction nozzle is arranged on the side wall of the adsorption plate that is in contact with the surface of the vehicle body, and the two ends of the air pipe are respectively connected to the output end of the air pump and the suction nozzle.

3. A coating thickness gauge according to claim 1, characterized in that: It also includes a positioning nozzle and a positioning rod, the bottom end of the positioning rod is coaxially connected to the positioning nozzle, the top end of the positioning rod is rotatably coaxially arranged on the bottom end of the measuring circular platform, the axial direction of the positioning rod and the bottom surface of the measuring circular platform are perpendicular to each other, and the positioning nozzle is used to fit the surface of the vehicle body.

4. A coating thickness gauge according to claim 3, characterized in that: There is a constant distance between the measuring end of the measuring device and the positioning nozzle.

5. A coating thickness gauge according to claim 3, characterized in that: It also includes a driving assembly, which includes a driving shaft, a sliding block and a plurality of driving rods. The driving shaft coaxially passes through the center of the measuring circular platform. The bottom end of the driving shaft is rotatably connected to the positioning rod coaxially. The sliding block is slidably connected to the driving shaft coaxially. The sliding block is located between the measuring circular platform and the positioning rod. The plurality of driving rods are matched with the plurality of articulated rods in a one-to-one manner. The two ends of any driving rod are respectively hinged to the sliding block and the corresponding articulated rod.

6. A coating thickness gauge according to claim 5, characterized in that: The central axis of the driving rod, the central axis of the corresponding hinged rod and the central axis of the corresponding adsorption plate are in the same plane.

7. A coating thickness gauge according to claim 1, characterized in that: There are four hinged rods in total.

8. A coating thickness gauge according to claim 5, characterized in that: It also includes a pressing assembly, wherein the driving shaft includes a driving roller, a rotating roller and a control roller which are relatively rotatable and coaxially arranged with each other in sequence, the rotating roller is coaxially connected to the measuring circular platform, and the other end of the driving roller is coaxially connected to the positioning rod which is relatively rotatable, the rotating roller, the driving roller and the control roller jointly form a connecting groove, the pressing assembly includes a pressing rod, a control part, a pressing output rod and a plurality of connecting units, the control part is arranged in the connecting groove of the control roller, the control part is provided with an output port and an input port, the pressing rod is arranged on the input port of the control part, the pressing output rod is connected with the output port of the control part, the pressing rod is exposed outside the connecting groove, when the pressing rod presses the control part for the first time, the control part controls the pressing output rod to retract into the output port of the control part; when the pressing rod presses the control part again, the control part controls the pressing output rod to extend out of the output port of the control part; the central axis direction of the pressing output rod coincides with the central axis direction of the driving shaft; A plurality of connection units are arranged at equal angles around the central axis of the pressing output rod at one end of the pressing output rod away from the control part; the connection unit includes a connecting rod and a connecting block, the two ends of the connecting rod are respectively connected to the connecting block and one end of the pressing output rod, the central axis of the connecting rod and the central axis of the driving roller are arranged parallel to each other, the connecting block is slidably arranged on the inner wall of the driving shaft, and the connecting block can lock or release its abutting and fitting relationship with the driving roller.

9. A coating thickness gauge according to claim 8, characterized in that: The moving length of the pressing output rod is greater than the length of the connecting block.

10. A coating thickness gauge according to claim 1, characterized in that: It also includes an auxiliary positioning nozzle, a movable rod and an internally hollow fixed rod. The movable rod can be slidably arranged in one end of the fixed rod, and the other end of the fixed rod is connected to the bottom surface of the measuring circular platform. The auxiliary positioning nozzle is connected to the other end of the movable rod, and the auxiliary positioning nozzle can lock or release its fitting relationship with the side wall of the vehicle body.

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