Water channel airtightness detection jig capable of self-adapting to deflection error

Abstract

The invention relates to the technical field of air tightness detection, and discloses a deflection error self-adaptive water channel air tightness detection jig which comprises a tray, a handle is fixedly connected to the upper surface of the tray, a motor assembly is fixedly connected to the upper surface of the tray, and a telescopic rod is fixedly connected to the upper surface of the tray. A self-adaptive device is arranged on the upper surface of the tray, an auxiliary fixing device is arranged on the upper portion of the telescopic rod, the self-adaptive device comprises a linear sliding rail, and a tension spring is fixedly connected to the upper portion of the linear sliding rail. By means of the air cylinder, the bracket, the sliding block, the linear sliding rail, the tension spring, the movable frame and the guide block, when a product is placed on the tray, the guide block can be pushed along with the angular deviation of a water channel of the product, and when the water channel deviates, the tension spring can deform through the elasticity of the tension spring and guide the water channel; therefore, the mechanism can be suitable for various products with water channel angle deviation.

Description

Technical Field

[0001] The invention relates to the technical field of airtightness detection, and in particular to a waterway airtightness detection jig with adaptive deflection error. Background Art

[0002] The air tightness test of the water channel of the automobile shell is a test to check the sealing performance of the water channel of the automobile shell. Its purpose is to ensure that there are no leaks in the water channel of the automobile shell. During the test, the automobile shell will be placed in a specific test environment. By filling the water channel of the shell with a certain pressure of gas, such as air or nitrogen, and then using professional testing equipment, such as pressure sensors, to monitor the pressure changes in the shell. If the pressure drops beyond the specified range, it may indicate that there is a leak in the shell. This test is very critical to automobile safety and comfort. From a safety perspective, it can prevent leakage of fuel vapor or battery coolant, and ensure a good driving experience.

[0003] At present, the design process is that each link has its own technical personnel who organize the corresponding work content and pass it on to the personnel in the next link for processing. The entire project is managed and coordinated by the project management department.

[0004] However, in actual use, due to the relative independence of various departments in the processing process and certain precision errors in the production process, the positions of the water channels inside different automobile shells are not exactly the same. Therefore, when using standardized airtightness detection fixtures to detect and fix them, the automobile shell water channels with certain deviations will not be able to be completely fixed, which will affect the detection accuracy of the airtightness detection of the water channels inside the automobile shell. In view of this, we propose a water channel airtightness detection fixture with adaptive deflection error. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a water channel airtightness detection fixture with adaptive deflection error, which solves the problem that the automobile shell water channel with a certain deviation cannot be completely fixed when using a standardized airtightness detection fixture to detect and fix it.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A waterway airtightness detection fixture with adaptive deflection error, comprising a tray, a handle fixedly connected to the upper surface of the tray, a motor assembly fixedly connected to the upper surface of the tray, a telescopic rod fixedly connected to the upper surface of the tray, an adaptive device arranged on the upper surface of the tray, and an auxiliary fixing device arranged on the upper part of the telescopic rod;

[0007] The adaptive device includes a linear slide rail, the upper part of which is fixedly connected to a tension spring, the end of the tension spring away from the linear slide rail is elastically connected to a movable frame, the upper surface of the movable frame is slidably connected to a slider, the upper part of the slider is fixedly connected to a cylinder, the left and right ends of the movable frame are fixedly connected to brackets, the middle part of the movable frame is fixedly connected to a guide block, and the upper part of the movable frame is provided with an auxiliary sealing device.

[0008] Preferably, the auxiliary sealing device includes a pushing block, a hinge block is fixedly connected to the outer arc surface of the pushing block, a rotating shaft is rotatably connected to the center of the inner surface of the hinge block, a claw is rotatably connected to the outer arc surface of the rotating shaft, a rubber block is fixedly connected to the end of the claw away from the rotating shaft, and the middle of the claw contacts the support block.

[0009] Preferably, the auxiliary fixing device includes a transmission block, a knob is rotatably connected to the middle of the transmission block, a one-way valve is fixedly connected to one end of the knob that passes through the inner side of the transmission block, and a negative pressure suction cup is fixedly connected to the upper surface of the transmission block.

[0010] Preferably, the handles are provided in three groups, and the three groups of handles are respectively located at the front, left side and right side of the upper surface of the tray, the telescopic rods and motor assemblies are provided in four groups, and are respectively located at the four corners of the upper surface of the tray, and the adaptive devices are provided in two groups, both of which are located at the center of the upper surface of the tray.

[0011] Preferably, the lower surface of the linear slide rail is fixedly connected to the tray by bolts, four tension springs are provided, and the four tension springs are respectively located at the front and rear ends of the linear slide rail in groups of two, a rectangular slide groove is provided on the upper surface of the movable frame, and a rectangular groove is provided on the lower surface of the slider.

[0012] Preferably, a cylindrical through hole is provided on the upper surface of the slider, the output shaft of the cylinder is fixedly connected to the support block, an arc-shaped groove is provided on the upper surface of the guide block, and the adaptive device as a whole is provided with two groups both located in the middle of the upper surface of the tray.

[0013] Preferably, the lower part of the pushing block is fixedly connected to the movable frame through a straight rod, and hinge blocks are provided at the front and rear ends of the pushing block. The center of the inner surface of the hinge block is elastically connected to the rotating shaft through a spiral spring, and the inner surface of the hinge block is provided with a groove with the same diameter as the rotating shaft, and a rectangular through-slide groove is provided in the middle of the inner surface of the claw.

[0014] Preferably, the inner surface of the support block is provided with multiple groups of rectangular grooves, and cylindrical protrusions are provided at the front and rear ends of the support block. The cylindrical protrusions at the front and rear ends of the support block are embedded in the middle of the claw, the claw is arranged in an inclined shape as a whole, and the rubber block is arranged in an arc shape.

[0015] Preferably, a motor assembly is fixedly connected to the left side of the transmission block, and the transmission block is arranged in a Z shape as a whole. A telescopic rod is fixedly connected to one end of the transmission block away from the motor assembly. A through hole is provided on the front surface, interior and upper surface of the transmission block. The one-way valve is located inside the through hole at the front end of the transmission block, and a through hole is provided at the center of the inner surface of the negative pressure suction cup.

[0016] Preferably, a plurality of groups of rectangular rubber protrusions are provided on the outer arc surface of the knob, cylindrical grooves are provided at both upper and lower ends of the one-way valve, springs are provided at both upper and lower ends of the one-way valve, clamping blocks are slidably connected at both upper and lower ends of the through hole at the front end of the transmission block, and hemispherical grooves are provided at both upper and lower ends.

[0017] Working principle: When using this device, the car body waiting for the water channel air tightness test needs to be placed above the device, and the water channel below it is close to the guide block. At this time, the water channel will be embedded in the guide block, and then squeeze and push the guide block to cause deviation. At this time, the tension spring will give a certain reaction force through its own elastic force, thereby pushing the water channel in the opposite direction to be guided to the correct position. At the same time, during the detection process, the cylinder can be controlled to operate and drive the push block to move away from the support block. At this time, since the claw is tilted as a whole, the end of the push block away from the push block can gradually move closer when driving the claw to move, and the elastic force of the volute spring gives a certain pressure to the water channel. In addition, since the surface friction coefficient of the rubber pad is large, the water channel wrapped by the rubber pad is not easy to deviate under the influence of external force, thereby improving the stability of the air tightness test.

[0018] At the same time, when the car shell is placed on top of the device, the vacuum suction cup on the upper surface of the transmission block will be squeezed and the air inside it will be discharged. At this time, the one-way valve needs to be kept in a unidirectional direction toward the outside of the transmission block. The air inside the vacuum suction cup will flow out along the internal channel of the transmission block in one direction, and the pressure difference will help the car shell to remain stable. When it is necessary to remove the assisted and fixed car shell, it is only necessary to turn the knob to drive the one-way valve to rotate through the coupling. At this time, the one-way valve will release the obstruction to the internal channel of the transmission block during the rotation, and allow outside air to enter the negative pressure suction cup through the transmission block. At this time, the pressure difference between the inside and outside of the negative pressure suction cup is 0, allowing people to directly take out the car shell placed on it.

[0019] The present invention provides a waterway airtightness detection fixture with adaptive deflection error. It has the following beneficial effects:

[0020] 1. The present invention is provided with a cylinder, a bracket, a slider, a linear slide rail, a tension spring, a movable frame, and a guide block. When the product is placed on the pallet, the guide block will be pushed along with the angle deviation of the product waterway. At the same time, since the angle of deviation of each product is different, when the waterway is offset, the tension spring can deform and correct it through its own elasticity, so the present mechanism can be applied to a variety of products with offset waterway angles.

[0021] 2. The rubber block, claw, push block, support block, rotating shaft and hinge block provided in the present invention can drive the support block to move and move the push block toward the support block through the cylinder when the water channel is placed on the upper surface of the guide block, thereby driving the claw angle to rotate and driving the rubber block to fit tightly against the outer surface of the water channel, thereby completing the auxiliary sealing of the water channel to be tested and avoiding position and angle deviation during the detection process.

[0022] 3. The present invention is provided with a negative pressure suction cup, a knob, a transmission block, a one-way valve, and a clamping block. When the car shell is placed on the device, the suction force of the negative pressure suction cup can be controlled by the knob to ensure that the car shell is adsorbed on the fixture. The one-way valve prevents air leakage through its own one-way conductivity during the detection process once the shell contacts the fixture, and maintains the negative pressure state inside the negative pressure suction cup, thereby improving the stability of the waterway during the air tightness detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 It is a schematic diagram of the adaptive device of the present invention;

[0025] Figure 3 It is a schematic diagram of the auxiliary sealing device of the present invention;

[0026] Figure 4 It is a schematic diagram of the cross section of the clamping claw of the present invention;

[0027] Figure 5 It is a schematic diagram of the transmission block of the present invention;

[0028] Figure 6 It is a schematic diagram of the knob and the one-way valve of the present invention;

[0029] Figure 7 It is a schematic diagram of the card block of the present invention.

[0030] Among them, 1. tray; 2. adaptive device; 3. auxiliary sealing device; 4. auxiliary fixing device; 5. motor assembly; 6. telescopic rod; 7. handle; 201. cylinder; 202. bracket; 203. slider; 204. linear slide rail; 205. tension spring; 206. movable frame; 207. guide block; 301. rubber block; 302. claw; 303. push block; 304. support block; 305. rotating shaft; 306. hinge block; 401. negative pressure suction cup; 402. knob; 403. transmission block; 404. one-way valve; 405. clamping block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example:

[0033] Please see attached Figure 1 -Attached Figure 2 The embodiment of the present invention provides a waterway airtightness detection fixture with adaptive deflection error, comprising a tray 1, a handle 7 is fixedly connected to the upper surface of the tray 1, a motor assembly 5 is fixedly connected to the upper surface of the tray 1, a telescopic rod 6 is fixedly connected to the upper surface of the tray 1, an adaptive device 2 is arranged on the upper surface of the tray 1, and an auxiliary fixing device 4 is arranged on the upper part of the telescopic rod 6;

[0034] The adaptive device 2 includes a linear slide rail 204, the upper part of which is fixedly connected to a tension spring 205, the end of the tension spring 205 away from the linear slide rail is elastically connected to a movable frame 206, the upper surface of the movable frame 206 is slidably connected to a slider 203, the upper part of the slider 203 is fixedly connected to a cylinder 201, the left and right ends of the movable frame 206 are fixedly connected to a bracket 202, the middle part of the movable frame 206 is fixedly connected to a guide block 207, and the upper part of the movable frame 206 is provided with an auxiliary sealing device 3.

[0035] There are three groups of handles 7, and the three groups of handles 7 are respectively located at the front, left and right sides of the upper surface of the tray 1, which is convenient for people to carry and transport the device. There are four groups of telescopic rods 6 and motor components 5. Through the lifting of four groups of telescopic rods 6 and motor components 5, the stability of the car shell placed above the device can be guaranteed to be stronger, avoiding its deviation or shaking during the waterway air tightness detection process, thereby affecting the subsequent measurement accuracy. They are respectively located at the four corners of the upper surface of the tray 1, and two groups of adaptive devices 2 are provided, both located at the center of the upper surface of the tray 1. The lower surface of the linear slide rail 204 is fixedly connected to the tray 1 by bolts. There are four tension springs 205, and the four tension springs 2 05 Two groups are respectively located at the front and rear ends of the linear slide rail 204, so that it can drive the water channel to be corrected by its own elastic force when it is squeezed. A rectangular slide groove is provided on the upper surface of the movable frame 206, and a rectangular groove is provided on the lower surface of the slider 203. A cylindrical through hole is provided on the upper surface of the slider 203, so that the cylinder 201 can be accommodated inside it. The output shaft of the cylinder 201 is fixedly connected to the support block 304. An arc-shaped groove is provided on the upper surface of the guide block 207, and the guide block 207 is made of plastic material, so the water channel can be stuck therein by its own elastic deformation ability. The adaptive device 2 is overall provided with two groups, both of which are located in the middle of the upper surface of the tray 1.

[0036] Please refer to the attached Figure 3 -Attached Figure 4 The auxiliary sealing device 3 includes a pushing block 303, a hinge block 306 is fixedly connected to the outer arc surface of the pushing block 303, a rotating shaft 305 is rotatably connected to the center of the inner surface of the hinge block 306, a claw 302 is rotatably connected to the outer arc surface of the rotating shaft 305, one end of the claw 302 away from the rotating shaft 305 is fixedly connected to the rubber block 301, and the middle part of the claw 302 contacts the support block 304.

[0037] The lower part of the pushing block 303 is fixedly connected to the movable frame 206 through a straight rod, so the position stability of the pushing block 303 can be guaranteed. The front and rear ends of the pushing block 303 are provided with hinge blocks 306. The center of the inner surface of the hinge block 306 is elastically connected to the rotating shaft 305 through a spiral spring. Therefore, the elastic force of the spiral spring can ensure that the claw 302 always moves close to the supporting block 304. The inner surface of the hinge block 306 is provided with a groove with the same diameter as the rotating shaft 305, so that the rotating shaft 305 can be located inside it and rotate. The middle part of the inner surface of the claw 302 is provided with a rectangular through-sliding groove, so that the cylindrical protrusion inside the groove of the supporting block 304 can be accommodated to move inside it and limit its movement trajectory. The inner surface of the block 304 is provided with a plurality of rectangular grooves, so that the claw 302 can be accommodated therein. The front and rear ends of the support block 304 are provided with cylindrical protrusions, and the cylindrical protrusions at the front and rear ends of the support block 304 are embedded in the middle of the claw 302. The claw 302 is arranged as a whole in an inclined shape, so when the support block 304 approaches or moves away from the push block 303, the claw 302 can be driven accordingly and produce an angular displacement, thereby completing the auxiliary clamping and limiting of the waterway. The rubber block 301 is arranged in an arc shape, and the surface friction coefficient at the inner arc surface of the rubber block 301 is relatively large, so that it can maintain the overall stability of the waterway in the process of clamping the waterway, and reduce the risk of the waterway being offset due to external force through friction.

[0038] Please see attached Figure 5 - Attachment Figure 7 The auxiliary fixing device 4 includes a transmission block 403, the middle part of which is rotatably connected to a knob 402, one end of the knob 402 that passes through the inner side of the transmission block 403 is fixedly connected to a one-way valve 404, and the upper surface of the transmission block 403 is fixedly connected to a negative pressure suction cup 401.

[0039] The left side of the transmission block 403 is fixedly connected to the motor assembly 5, and the transmission block 403 is arranged in a Z shape as a whole. The end of the transmission block 403 away from the motor assembly 5 is fixedly connected to the telescopic rod 6, so that when the motor above the motor assembly 5 is working, the telescopic rod 6 can be synchronously driven to rise to support the car shell placed above. The front surface, interior and upper surface of the transmission block 403 are provided with through holes, so that when the negative pressure suction cup 401 is squeezed, the air inside it can be pushed to the one-way valve 404 through the through hole at the center. The one-way valve 404 is located inside the through hole at the front end of the transmission block 403. A through hole is provided at the center of the inner surface of the negative pressure suction cup 401. A plurality of rectangular rubber protrusions are provided on the outer arc surface of the knob 402. In order to increase the friction between the knob 402 and the hand when people turn the knob 402, the knob 402 can be easily rotated by applying force. The upper and lower ends of the one-way valve 404 are provided with cylindrical grooves, and the end of the groove away from the one-way valve is set as an arc surface, so that the block 405 cannot be separated from the one-way valve 404, and the block 405 can move inside the grooves at the upper and lower ends of the one-way valve 404. The upper and lower ends of the one-way valve 404 are provided with springs, so that the block 405 is always pushed outward. The upper and lower ends of the one-way valve 404 are slidably connected with the block 405, and the upper and lower ends of the front end through hole of the transmission block 403 are provided with hemispherical grooves, so that the arc surface protrusion of the block 405 can be correspondingly embedded in the groove, thereby limiting the angle of the one-way valve 404.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterway airtightness detection jig with adaptive deflection error, comprising a tray (1), characterized in that: A handle (7) is fixedly connected to the upper surface of the tray (1), a motor assembly (5) is fixedly connected to the upper surface of the tray (1), a telescopic rod (6) is fixedly connected to the upper surface of the tray (1), an adaptive device (2) is provided on the upper surface of the tray (1), and an auxiliary fixing device (4) is provided on the upper part of the telescopic rod (6); The adaptive device (2) comprises a linear slide rail (204), the upper part of the linear slide rail (204) is fixedly connected to a tension spring (205), the end of the tension spring (205) away from the linear slide rail is elastically connected to a movable frame (206), the upper surface of the movable frame (206) is slidably connected to a slider (203), the upper part of the slider (203) is fixedly connected to a cylinder (201), the left and right ends of the movable frame (206) are fixedly connected to a bracket (202), the middle part of the movable frame (206) is fixedly connected to a guide block (207), and the upper part of the movable frame (206) is provided with an auxiliary sealing device (3).

2. The waterway airtightness detection jig with adaptive deflection error according to claim 1 is characterized in that: The auxiliary sealing device (3) comprises a pushing block (303), a hinge block (306) is fixedly connected to the outer arc surface of the pushing block (303), a rotating shaft (305) is rotatably connected to the center of the inner surface of the hinge block (306), a clamping claw (302) is rotatably connected to the outer arc surface of the rotating shaft (305), one end of the clamping claw (302) away from the rotating shaft (305) is fixedly connected to a rubber block (301), and the middle of the clamping claw (302) contacts the support block (304).

3. The waterway airtightness detection jig with adaptive deflection error according to claim 1 is characterized in that: The auxiliary fixing device (4) comprises a transmission block (403), the middle part of which is rotatably connected to a knob (402), one end of which passes through the inner side of the transmission block (403) and is fixedly connected to a one-way valve (404), and the upper surface of the transmission block (403) is fixedly connected to a negative pressure suction cup (401).

4. The waterway airtightness detection jig with adaptive deflection error according to claim 1 is characterized in that: The handles (7) are provided in three groups, and the three groups of handles (7) are respectively located at the front, left and right sides of the upper surface of the tray (1); the telescopic rods (6) and the motor assembly (5) are provided in four groups, and are respectively located at the four corners of the upper surface of the tray (1); the adaptive device (2) is provided in two groups, and is located at the center of the upper surface of the tray (1).

5. The waterway airtightness detection jig with adaptive deflection error according to claim 1 is characterized in that: The lower surface of the linear slide rail (204) is fixedly connected to the tray (1) by bolts, four tension springs (205) are provided, and the four tension springs (205) are arranged in groups of two at the front and rear ends of the linear slide rail (204), a rectangular slide groove is provided on the upper surface of the movable frame (206), and a rectangular groove is provided on the lower surface of the slider (203).

6. The waterway airtightness detection jig with adaptive deflection error according to claim 1 is characterized in that: A cylindrical through hole is provided on the upper surface of the slider (203), the output shaft of the cylinder (201) is fixedly connected to the support block (304), an arc-shaped groove is provided on the upper surface of the guide block (207), and the adaptive device (2) is provided with two groups both located in the middle of the upper surface of the tray (1).

7. The waterway airtightness detection jig with adaptive deflection error according to claim 2 is characterized in that: The lower part of the pushing block (303) is fixedly connected to the movable frame (206) through a straight rod, and hinge blocks (306) are provided at both the front and rear ends of the pushing block (303). The center of the inner surface of the hinge block (306) is elastically connected to the rotating shaft (305) through a spiral spring. The inner surface of the hinge block (306) is provided with a groove with the same diameter as the rotating shaft (305), and the middle part of the inner surface of the claw (302) is provided with a rectangular through-sliding groove.

8. The waterway airtightness detection jig with adaptive deflection error according to claim 2 is characterized in that: The inner surface of the support block (304) is provided with a plurality of groups of rectangular grooves. The front and rear ends of the support block (304) are both provided with cylindrical protrusions. The front and rear ends of the support block (304) are embedded in the middle of the claw (302). The claw (302) is arranged in an inclined shape as a whole, and the rubber block (301) is arranged in an arc shape.

9. The waterway airtightness detection jig with adaptive deflection error according to claim 3 is characterized in that: The left side of the transmission block (403) is fixedly connected to a motor assembly (5); the transmission block (403) is arranged in a Z-shape as a whole; one end of the transmission block (403) away from the motor assembly (5) is fixedly connected to a telescopic rod (6); a through hole is provided on the front surface, the interior and the upper surface of the transmission block (403); the one-way valve (404) is located inside the through hole at the front end of the transmission block (403); and a through hole is provided at the center of the inner surface of the negative pressure suction cup (401).

10. The waterway airtightness detection jig with adaptive deflection error according to claim 3 is characterized in that: The outer arc surface of the knob (402) is provided with a plurality of groups of rectangular rubber protrusions, the upper and lower ends of the one-way valve (404) are provided with cylindrical grooves, the upper and lower ends of the one-way valve (404) are provided with springs, the upper and lower ends of the one-way valve (404) are slidably connected with a clamping block (405), and the upper and lower ends of the front end through hole of the transmission block (403) are provided with hemispherical grooves.

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