Air tightness detection equipment for automobile refitting

Abstract

The invention discloses air tightness detection equipment for automobile modification. The air tightness detection equipment comprises a box body and an air tightness detection assembly, the air tightness detection assembly comprises a supporting seat, a guide limiting column, a light source emitter and a light source receiving plate; two supporting seats are horizontally and rotatably arranged above the box body in a spaced mode, and two inverted-L-shaped light source receiving plates capable of getting close to the two supporting seats are vertically and movably arranged at the positions, located on the two sides of the two supporting seats, of the upper end of the box body correspondingly. The upper end of each supporting seat is vertically and fixedly provided with a guide limiting column which is matched with a to-be-detected product, the end of each guide limiting column is in a circular truncated cone shape, the top of each supporting seat is vertically and fixedly provided with a light source emitter, and the upper end of each supporting seat and the surface of each guide limiting column are fixedly provided with rubber layers; according to the air tightness detection equipment for automobile modification, air tightness detection can be carried out on a plurality of to-be-detected products through the air tightness detection assembly by using an optical principle, the operation is simple, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of air tightness detection equipment, in particular to an air tightness detection equipment for automobile modification. Background Art

[0002] CNG vehicles refer to vehicles that use compressed natural gas instead of conventional gasoline or diesel as vehicle fuel. CNG vehicles often use gas cylinders, which are gas containers and storage devices that can withstand high pressures. Gas cylinders from the same batch should be inspected for air tightness before use.

[0003] After searching: Chinese patent application number is "CN202022198106.0", which discloses an air tightness detection device for CNG vehicle modification, including a base and a detection component. The detection component includes a support frame, a driving part, a fixed plate, a movable part, a clamping part and a water tank. The movable part includes a cylinder, a connecting rod and a connecting plate. The cylinder is rotatably connected to the side of the fixed plate close to the water tank. There are two connecting rods, which are rotatably connected to the side of the fixed plate close to the cylinder. The movable end of the cylinder is rotatably connected to one side of the connecting rod. The clamping part includes an upper clamping plate and a lower clamping plate. The upper clamping plate and the lower clamping plate are connected by a snap fastener. Multiple gas cylinders are clamped by the upper clamping plate and the lower clamping plate and locked with a snap fastener. The cylinder controls the upper clamping plate and the lower clamping plate to enter and exit the water tank, saving manpower and time and improving detection efficiency.

[0004] In the process of implementing the present invention, the inventor found that the prior art has the following problems:

[0005] The prior art requires that the product to be tested be sealed and placed in water through a clamp for air tightness testing. After the test, the product to be tested needs to be dried, which is time-consuming, labor-intensive, and cumbersome, reducing work efficiency.

[0006] Therefore, it is an urgent problem to be solved by the present invention to provide an airtightness detection device for automobile modification, which can perform airtightness detection on multiple products to be tested by using optical principles through an airtightness detection component during use, is simple to operate, and improves the detection efficiency. Summary of the invention

[0007] In view of the above technical problems, the purpose of the present invention is to overcome the problem in the prior art that the product to be tested needs to be sealed and placed in water through a clamp for airtightness testing. After the test, the product to be tested needs to be dried, which is time-consuming, labor-intensive, and cumbersome, reducing work efficiency. Thus, an airtightness testing device for automobile modification is provided, which can perform airtightness testing on multiple products to be tested by using optical principles through an airtightness testing component during use, is simple to operate, and improves the detection efficiency.

[0008] In order to achieve the above-mentioned object, the present invention provides an airtightness detection device for automobile modification, the device comprising: a box body and an airtightness detection component;

[0009] The airtight detection assembly includes: a support seat, a guide limit column, a light source transmitter and a light source receiving plate; wherein,

[0010] Two support seats are arranged above the box body at intervals and horizontally rotatably, and two inverted L-shaped light source receiving plates that can approach the two support seats are vertically and movably arranged on the upper ends of the box body located on both sides of the two support seats, a guide limit column with a truncated cone end portion and adapted to the product to be tested is vertically fixedly arranged on the upper end of each support seat, a light source emitter is vertically fixedly arranged on the top of the support seat, and a rubber layer is fixedly arranged on the upper end of each support seat and on the surface of each guide limit column.

[0011] Preferably, a clamping auxiliary mechanism for clamping and fixing the product to be tested vertically inverted on the support seat is fixedly arranged on the top of each light source receiving plate, and the clamping auxiliary mechanism comprises: a cylinder, an auxiliary seat and a No. 1 ball; wherein,

[0012] The cylinder vertically penetrates and is fixed on the top of the light source receiving plate, and an auxiliary seat capable of resting against the product to be tested is horizontally fixed on the free end of its vertically arranged piston rod, and at least two supporting legs are spaced and vertically fixed below the auxiliary seat, and a No. 1 ball capable of resting against the product to be tested is rotatably provided at the bottom end of each supporting leg.

[0013] Preferably, the device further comprises a rotating mechanism for driving the two guide limit posts to rotate, wherein the rotating mechanism comprises: a rotating shaft, a driven gear, a rotating motor and a power gear; wherein,

[0014] The upper end of the box body is spaced apart and vertically and rotatably provided with two rotating shafts for assembling the two support seats, and the top end of each rotating shaft is fixed at the center position of the bottom end of the support seat, and a driven gear is coaxially fixed on each rotating shaft. A power gear meshing with the two driven gears is vertically and rotatably provided on the box body between the two rotating shafts, and a rotating motor for driving the power gear to rotate is vertically fixed inside the box body, and the output shaft of the rotating motor is coaxially connected to the central rotating shaft of the power gear through a coupling.

[0015] Preferably, a shock-absorbing plate for supporting the rotating motor is fixedly arranged horizontally inside the box, and the bottom end of each rotating shaft with a hollow structure inside partially extends into the box and is fixedly arranged horizontally with a fixing frame, and a battery for providing electric energy to the corresponding light source emitter is fixedly arranged horizontally inside each fixing frame, and the light source emitter is electrically connected to the battery through an electric wire, one end of the electric wire is electrically connected to the light source emitter, and the other end of the electric wire passes through the inside of the rotating shaft and penetrates into the interior of the fixing frame from the top and is connected to the battery.

[0016] Preferably, a plurality of No. 2 balls are evenly and rotatably arranged at the bottom end of each of the fixing frames, and the bottom end of each No. 2 ball abuts against the shock absorbing plate.

[0017] Preferably, the inner wall of each light source receiving plate facing the light source emitter is uniformly sprayed with a black coating.

[0018] Preferably, the device further comprises a driving mechanism for driving the two light source receiving plates to move closer to or farther from each other, the driving mechanism comprising: a first rack plate, a second rack plate and a driving gear; wherein,

[0019] The upper end of the box body is spaced apart and provided with guide windows adapted to the two light source receiving plates, and the bottom ends of the two light source receiving plates pass through the corresponding guide windows and extend to the interior of the box body respectively, and the facing surfaces of the two light source receiving plates located above the shock-absorbing plate are spaced apart and horizontally fixed with a first rack plate and a second rack plate respectively, and the interior of the box body located between the first rack plate and the second rack plate is horizontally and rotatably provided with driving gears respectively meshing with the two rack plates.

[0020] Preferably, a driving motor for driving the driving gear to rotate is horizontally fixedly arranged on the box body, and the output shaft of the driving motor is coaxially connected to the central rotating shaft of the driving gear through a coupling.

[0021] Preferably, a guide rod is fixedly arranged horizontally in each guide window, and a guide hole for matching with the guide rod is horizontally penetrated through each light source receiving plate, and the light source receiving plate is horizontally and slidably assembled on the guide rod through the guide hole.

[0022] According to the above technical solution, the air tightness detection device for automobile modification provided by the present invention has the following beneficial effects when used:

[0023] (1) When in use, the product to be tested is inverted so that its can mouth is inverted and against the support seat, and the light source emitter on the support seat is located inside the product to be tested, and the guide limit column on the support seat is against the inner wall of the can mouth of the product to be tested, so that the rubber layer is squeezed to deform. On the one hand, the guide limit column and the rubber layer on the support seat play a sealing role to seal the can mouth of the product to be tested. In addition, the rubber layer on the surface of the guide limit column can be used to increase the friction between the guide limit column and the inner wall of the can mouth of the product to be tested. When the rubber layer on the surface of the wire limit column is squeezed and deformed, the guide limit column can not only limit and fix the product to be tested to prevent the product to be tested from falling off the support seat during the rotation of the support seat, but also enable the support seat to drive the product to be tested fixed thereon to rotate together during the rotation.

[0024] (2) After the product to be tested is assembled onto the support seat, the two light source receiving plates are driven to approach the two support seats respectively so that the two light source receiving plates are close to the product to be tested, and the light source emitter is turned on to illuminate the interior of the product to be tested, and the support plate is driven to rotate so that the side wall of the product to be tested at its upper end can face the corresponding light source receiving plate. When the side wall of the product to be tested has defects such as cracks, the light emitted by the light source emitter located inside the product to be tested will shine on the light source receiving plate through the cracks, so that the sealing of the product to be tested can be judged by whether there is light on the light source receiving plate, and whether the product to be tested is complete or has defects.

[0025] In summary, the present invention can perform airtightness detection on multiple products to be tested by using an airtightness detection component and utilizing optical principles, which is simple to operate and improves detection efficiency.

[0026] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation mode; and the parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a structural schematic diagram of an air tightness detection device for automobile modification provided in a preferred embodiment of the present invention;

[0029] Figure 2It is a structural schematic diagram of a certain moment during the working process of the air tightness detection equipment for automobile modification provided in a preferred embodiment of the present invention;

[0030] Figure 3 yes Figure 2 Structural cross-sectional view of

[0031] Figure 4 It is a schematic diagram of the assembly of an airtightness detection component and a rotating mechanism of an airtightness detection device for automobile modification provided in a preferred embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of an airtightness detection component of an airtightness detection device for automobile modification provided in a preferred embodiment of the present invention at a certain moment during the detection process.

[0033] Description of Reference Numerals

[0034] 1. Box body; 2. Airtight detection component; 201. Support seat; 202. Guide limit column; 203. Light source transmitter; 204. Light source receiving plate; 3. Black coating; 4. Clamping auxiliary mechanism; 401. Cylinder; 402. Auxiliary seat; 403. No. 1 ball; 5. Fixed frame; 6. Battery; 7. Shock absorber plate; 801. No. 1 rack plate; 802. No. 2 rack plate; 803. Driving gear; 9. Rotating mechanism; 901. Rotating shaft; 902. Driven gear; 903. Rotating motor; 904. Power gear; 10. Guide rod; 11. Driving motor. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0036] like Figure 1-5 As shown, the present invention provides an air tightness detection device for automobile modification, the device comprising: a box body 1 and an air tightness detection component 2;

[0037] The airtight detection assembly 2 includes: a support seat 201, a guide limit column 202, a light source emitter 203 and a light source receiving plate 204; wherein,

[0038] Two support seats 201 are arranged above the box body 1 at intervals and horizontally rotatably, and two inverted L-shaped light source receiving plates 204 that can approach the two support seats 201 are vertically and movably arranged on the upper ends of the box body 1 located on both sides of the two support seats 201, and a guide limit column 202 with a truncated cone end and adapted to the product to be tested is vertically fixed on the upper end of each support seat 201, a light source emitter 203 is vertically fixed on the top of the support seat 201, and a rubber layer is fixedly provided on the upper end of each support seat 201 and on the surface of each guide limit column 202.

[0039] In the above solution, the light source emitter 203 may be an LED lamp that can emit colors such as red, orange, yellow, green and blue.

[0040] When in use, the product to be tested is turned upside down so that its can mouth is turned upside down and against the support seat 201, and the light source emitter 203 on the support seat 201 is located inside the product to be tested, and the guide limit column 202 on the support seat 201 is against the inner wall of the can mouth of the product to be tested, so that the rubber layer is squeezed to deform it. On the one hand, the guide limit column 202 and the rubber layer on the support seat 201 play a sealing role to block the can mouth of the product to be tested. In addition, the rubber layer on the surface of the guide limiting column 202 can be used to increase the friction between the guide limiting column 202 and the inner wall of the can mouth of the product to be tested. When the rubber layer on the surface of the wire limiting column 202 is squeezed and deformed, the guide limiting column 202 can not only limit and fix the product to be tested to prevent the product to be tested from falling off the support seat 201 during the rotation of the support seat 201, but also enable the support seat 201 to drive the product to be tested fixed thereon to rotate together with it during the rotation.

[0041] After the product to be tested is assembled on the support seat 201, the two light source receiving plates 204 are driven to approach the two support seats 201 respectively, so that the two light source receiving plates 204 are close to the product to be tested, and the light source emitter 203 is turned on to illuminate the interior of the product to be tested, and the support plate 201 is driven to rotate so that the side wall of the product to be tested at its upper end can face the light source receiving plate 204 corresponding to it. When the side wall of the product to be tested has defects such as cracks, the light emitted by the light source emitter 203 located inside the product to be tested will shine on the light source receiving plate 204 through the cracks, so that the sealing of the product to be tested can be judged by whether there is a light source on the light source receiving plate 204, and whether the product to be tested is complete or has defects.

[0042] In summary, the present invention can perform airtightness detection on multiple products to be tested by using optical principles through the airtightness detection component, which is simple to operate and improves the detection efficiency. It overcomes the problem that the prior art needs to seal the product to be tested and place it in water through a clamp for airtightness detection. After the detection, the product to be tested needs to be dried, which is time-consuming, labor-intensive, and cumbersome, reducing the work efficiency.

[0043] In a preferred embodiment of the present invention, a clamping auxiliary mechanism 4 for clamping and fixing the product to be tested vertically inverted on the support seat 201 is fixedly arranged on the top of each light source receiving plate 204, and the clamping auxiliary mechanism 4 includes: a cylinder 401, an auxiliary seat 402 and a No. 1 ball 403; wherein,

[0044] The cylinder 401 is vertically penetrated and fixed on the top of the light source receiving plate 204, and an auxiliary seat 402 capable of resting on the product to be tested is horizontally fixed on the free end of its vertically arranged piston rod, and at least two supporting legs are spaced and vertically fixed below the auxiliary seat 402, and a No. 1 ball 403 capable of resting on the product to be tested is rotatably provided at the bottom end of each supporting leg.

[0045] In the above scheme, when in use, after the product to be tested is assembled on the support seat 201, the two light source receiving plates 204 are driven to approach the two support seats 201 until the clamping auxiliary mechanism 4 on the top of the two light source receiving plates 204 is located above the product to be tested, and then the piston rod of the cylinder 401 is driven to extend from its cylinder part to drive the auxiliary seat 402 to descend in the vertical direction until the No. 1 ball 403 thereon abuts against the product to be tested. In addition, under the action of the No. 1 ball 403, when the product to be tested rotates with the support seat 201, there is rolling friction between the product to be tested and the auxiliary seat 402, reducing the friction between the two.

[0046] Therefore, the clamping auxiliary mechanism 4 plays a role of limiting and fixing the product to be tested during the rotation on the support base 201, and prevents the product to be tested from falling off the support base 201 during the rotation.

[0047] In a preferred embodiment of the present invention, the device further comprises a rotating mechanism 9 for driving the two guide limit posts 202 to rotate, wherein the rotating mechanism 9 comprises: a rotating shaft 901, a driven gear 902, a rotating motor 903 and a power gear 904; wherein,

[0048] Two rotating shafts 901 for assembling the two support seats 201 are spaced apart and vertically rotatably provided at the upper end of the box body 1, and the top end of each rotating shaft 901 is fixed at the center position of the bottom end of the support seat 201, and a driven gear 902 is coaxially fixed on each rotating shaft 901. A power gear 904 meshingly connected to the two driven gears 902 is vertically and rotatably provided on the box body 1 located between the two rotating shafts 901, and a rotating motor 903 for driving the power gear 904 to rotate is vertically fixed inside the box body 1, and the output shaft of the rotating motor 903 is coaxially connected to the central rotating shaft of the power gear 904 through a coupling.

[0049] In the above scheme, when in use, the power gear 904 is driven to rotate by starting the rotating motor 903. Since the two driven gears 902 are respectively meshed and connected with the power gear 904, the two rotating shafts 901 can be driven to rotate to drive the two supporting seats 201 and the product to be tested fixed on the supporting seats 201 to rotate.

[0050] In addition, the rotating motor 903 may be a reduction motor.

[0051] In a preferred embodiment of the present invention, a shock-absorbing plate 7 for supporting a rotating motor 903 is fixedly disposed horizontally inside the box body 1, and the bottom end of each of the rotating shafts 901 with a hollow structure inside partially extends into the box body 1 and is fixedly disposed horizontally with a fixing frame 5, and a battery 6 for providing electrical energy to the corresponding light source emitter 203 is fixedly disposed horizontally inside each of the fixing frames 5, and the light source emitter 203 is electrically connected to the battery 6 via an electric wire, one end of the electric wire is electrically connected to the light source emitter 203, and the other end thereof passes through the inside of the rotating shaft 901 and penetrates into the fixed frame 5 from the top thereof and is connected to the battery 6.

[0052] In the above solution, a rubber pad is horizontally fixedly provided on the upper end of the shock absorbing plate 7 to achieve a shock absorbing effect.

[0053] The battery 6 is fixed in the fixing frame 5, and the battery 6 is electrically connected to the light source emitter 203 through wires. When the light source emitter 203 rotates with the support base 201, the fixing frame 5 and the battery 6 fixed therein can rotate together to avoid the entanglement of the wires.

[0054] In a preferred embodiment of the present invention, a plurality of No. 2 balls are evenly and rotatably provided at the bottom end of each of the fixing frames 5 , and the bottom end of each of the No. 2 balls abuts against the shock absorbing plate 7 .

[0055] In the above scheme, the sliding friction between the fixing frame 5 and the damping plate 7 is converted into rolling friction by the No. 2 ball, thereby reducing the friction between the two and extending the service life of the two.

[0056] In a preferred embodiment of the present invention, the inner wall of each light source receiving plate 204 facing the light source emitter 203 is uniformly sprayed with a black coating 3 .

[0057] In the above solution, the black coating 3 can more clearly illuminate the light source emitted by the light source emitter 203 onto the light source receiving plate 204 , so that the inspector can observe it more easily.

[0058] In a preferred embodiment of the present invention, the device further comprises a driving mechanism for driving the two light source receiving plates 204 to move closer to or farther from each other, the driving mechanism comprising: a first rack plate 801, a second rack plate 802 and a driving gear 803; wherein,

[0059] The upper end of the box body 1 is spaced apart and provided with guide windows adapted to the two light source receiving plates 204, and the bottom ends of the two light source receiving plates 204 pass through the corresponding guide windows and extend to the interior of the box body 1 respectively, and the facing surfaces of the two light source receiving plates 204 located above the shock absorbing plate 7 are spaced apart and horizontally fixed with a first rack plate 801 and a second rack plate 802, and the interior of the box body 1 located between the first rack plate 801 and the second rack plate 802 is horizontally and rotatably provided with a driving gear 803 respectively meshing with the two.

[0060] In the above scheme, when in use, the driving gear 803 is driven to rotate clockwise or counterclockwise to drive the first rack plate 801 and the second rack plate 802 meshing with it to drive the two light source receiving plates 204 to move closer to or away from each other toward the support plate 201.

[0061] In a preferred embodiment of the present invention, a driving motor 11 for driving the driving gear 803 to rotate is horizontally fixedly arranged on the box body 1, and the output shaft of the driving motor 11 is coaxially connected to the central rotating shaft of the driving gear 803 through a coupling.

[0062] In the above scheme, the driving motor 11 is started to drive the driving gear 803 to rotate counterclockwise or clockwise, so as to drive the first rack plate 801 and the second rack plate 802 meshing with it to drive the two light source receiving plates 204 to move closer to or away from each other toward the support plate 201.

[0063] In a preferred embodiment of the present invention, a guide rod 10 is horizontally fixed in each guide window, and a guide hole for matching with the guide rod 10 is horizontally penetrated through each of the light source receiving plates 204, and the light source receiving plates 204 are horizontally and slidably assembled on the guide rod 10 through the guide hole.

[0064] In the above scheme, the guide rod 10 and the guide hole on the light source receiving plate 204 are used in coordination to play a guiding role, so as to ensure that the light source receiving plate 204 can move smoothly and reliably in the horizontal direction.

[0065] In summary, the air tightness testing equipment for automobile modification provided by the present invention overcomes the problem in the prior art that the product to be tested needs to be sealed and placed in water through a clamp for air tightness testing. After the test, the product to be tested needs to be dried, which is time-consuming, labor-intensive, and cumbersome, reducing work efficiency.

[0066] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0067] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0068] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An air tightness detection device for automobile modification, characterized in that: The device comprises: a box body (1) and an airtightness detection component (2); The airtight detection assembly (2) comprises: a support seat (201), a guide limit column (202), a light source emitter (203) and a light source receiving plate (204); wherein: Two support seats (201) are arranged above the box body (1) in a spaced and horizontally rotatable manner, and two inverted L-shaped light source receiving plates (204) that can approach the two support seats (201) are arranged vertically and movably on the upper ends of the box body (1) located on both sides of the two support seats (201), respectively; a guide limit column (202) having a truncated cone end and adapted to the product to be tested is vertically fixedly arranged on the upper end of each support seat (201); a light source emitter (203) is vertically fixedly arranged on the top of the support seat (201), and a rubber layer is fixedly arranged on the upper end of each support seat (201) and on the surface of each guide limit column (202).

2. The air tightness testing device for automobile modification according to claim 1, characterized in that: A clamping auxiliary mechanism (4) for clamping and fixing the product to be tested vertically inverted on the support seat (201) is fixedly arranged on the top of each light source receiving plate (204), and the clamping auxiliary mechanism (4) comprises: a cylinder (401), an auxiliary seat (402) and a No. 1 ball (403); wherein: The cylinder (401) is vertically penetrated and fixed on the top of the light source receiving plate (204), and an auxiliary seat (402) capable of resting against the product to be tested is horizontally fixedly arranged on the free end of its vertically arranged piston rod, and at least two supporting legs are spaced and vertically fixedly arranged below the auxiliary seat (402), and a No. 1 ball (403) capable of resting against the product to be tested is rotatably arranged at the bottom end of each supporting leg.

3. The air tightness testing device for automobile modification according to claim 1, characterized in that: The device also includes a rotating mechanism (9) for driving the two guide limit posts (202) to rotate, wherein the rotating mechanism (9) includes: a rotating shaft (901), a driven gear (902), a rotating motor (903) and a power gear (904); wherein: Two rotating shafts (901) for assembling the two support seats (201) are arranged at intervals and vertically rotatably on the upper end of the housing (1), and the top end of each rotating shaft (901) is fixed to the center position of the bottom end of the support seat (201), and each rotating shaft (901) is coaxially fixed with a driven gear (902). A power gear (904) meshingly connected with the two driven gears (902) is vertically and rotatably arranged on the housing (1) between the two rotating shafts (901), and a rotating motor (903) for driving the power gear (904) to rotate is vertically fixed inside the housing (1), and the output shaft of the rotating motor (903) is coaxially connected with the central rotating shaft of the power gear (904) through a coupling.

4. The air tightness testing device for automobile modification according to claim 3, characterized in that: A shock-absorbing plate (7) for supporting a rotating motor (903) is fixedly arranged horizontally inside the box (1), and the bottom end of each rotating shaft (901) with a hollow structure inside partially extends into the box (1) and is fixedly arranged horizontally with a fixing frame (5), and a battery (6) for providing electric energy to the corresponding light source emitter (203) is fixedly arranged horizontally inside each fixing frame (5), and the light source emitter (203) is electrically connected to the battery (6) through an electric wire, one end of the electric wire is electrically connected to the light source emitter (203), and the other end of the electric wire passes through the inside of the rotating shaft (901) and penetrates into the inside of the fixing frame (5) from the top and is connected to the battery (6).

5. The air tightness testing device for automobile modification according to claim 4, characterized in that: A plurality of No. 2 balls are evenly and rotatably arranged at the bottom end of each of the fixed frames (5), and the bottom end of each No. 2 ball abuts against the shock absorbing plate (7).

6. The air tightness testing device for automobile modification according to claim 1, characterized in that: The inner wall of each light source receiving plate (204) facing the light source emitter (203) is evenly sprayed with a black coating (3).

7. The air tightness testing device for automobile modification according to claim 4, characterized in that: The device also includes a driving mechanism for driving the two light source receiving plates (204) to move closer to or farther from each other, the driving mechanism including: a first rack plate (801), a second rack plate (802) and a driving gear (803); wherein: The upper end of the box body (1) is spaced apart and provided with guide windows adapted to the two light source receiving plates (204), and the bottom ends of the two light source receiving plates (204) pass through the corresponding guide windows and extend to the interior of the box body (1) respectively, and the facing surfaces of the two light source receiving plates (204) located above the shock absorbing plate (7) are spaced apart and horizontally fixedly provided with a first rack plate (801) and a second rack plate (802), and the interior of the box body (1) between the first rack plate (801) and the second rack plate (802) is horizontally and rotatably provided with a driving gear (803) respectively meshing with the two rack plates.

8. The air tightness testing device for automobile modification according to claim 7, characterized in that: A driving motor (11) for driving the driving gear (803) to rotate is horizontally fixedly arranged on the box body (1), and the output shaft of the driving motor (11) is coaxially connected to the central rotating shaft of the driving gear (803) through a coupling.

9. The air tightness testing device for automobile modification according to claim 7, characterized in that: A guide rod (10) is fixedly arranged horizontally in each guide window, and a guide hole for matching with the guide rod (10) is horizontally penetrated through each light source receiving plate (204), and the light source receiving plate (204) is horizontally and slidably assembled on the guide rod (10) through the guide hole.

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