An evaporator cam disc inspection tool

Abstract

The present invention relates to the technical field related to cam detection, and discloses an evaporator cam disc inspection tool. Through the rotation of the cam quality inspection disc, a virtual clamping of the cam quality inspection disc is carried out from the center by a constant force clamping block. The clamping force is small, and the center hole of the cam disc to be inspected coincides with the center alignment hole of the cam quality inspection disc. Once there are defects such as uneven pouring in the cam disc to be inspected during pouring, it will cause the center of gravity of the cam disc to deviate from its center hole. As a result, a centrifugal force will occur when the cam disc to be inspected rotates. Once the defect exceeds the range required by the process, the centrifugal force will exceed the clamping force of the constant force clamping block, and then the constant force clamping block will press down, and the unqualified cam disc to be inspected will be thrown out, realizing the detection of pouring defects and rapid disassembly of the cam disc to be inspected.

Description

Technical Field

[0001] The present invention relates to the technical field related to cam detection, and specifically to an evaporator cam disk inspection tool. Background Art

[0002] The evaporator cam disk is an indispensable part in the evaporator. Its processing quality directly affects the overall performance of the evaporator and the operating efficiency of the air-conditioning system. The evaporator cam disk is usually made by an injection molding process, has a disk-shaped structure, and is provided with an arc-shaped cam disk track thereon. These structural features play a key role when the cam disk is installed and operates with the evaporator housing. However, during the processing of the cam disk, if the cam disk track curve is unqualified, it will seriously affect the installation accuracy and normal working performance of the cam disk, and may even lead to a decline in the performance of the air-conditioning system or even a malfunction. Therefore, in order to ensure the processing quality of the evaporator cam disk, a special inspection tool is needed to detect the processing accuracy of its housing mounting holes and cam disk tracks.

[0003] Traditional detection equipment, such as the inspection tool for the cam disk of an automotive air conditioner with the publication number CN103557764B, clamps the cam with a fixture and then performs contour detection on the cam. It is not only complex in operation but also low in detection efficiency, and it is difficult to meet the high requirements for product quality and detection speed in evaporator production. At the same time, traditional detection equipment can only be used for contour detection of cams, and cannot be used for detecting the casting quality and processing quality of cams. Summary of the Invention

[0004] The purpose of the present invention is to provide an evaporator cam disk inspection tool to solve the problems in the above background art that the current traditional detection equipment is complex in operation, low in detection efficiency, and cannot be applied to the dynamic balance detection of cams.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An evaporator cam disk inspection tool, including an inspection tool frame, a first support frame is fixedly connected to the inspection tool frame, a cam quality inspection disk is rotatably connected to the first support frame, a double-headed motor is fixedly installed on the inspection tool frame, a first pulley is fixedly connected to the lower end of the output shaft of the double-headed motor, a second pulley is fixedly connected below the cam quality inspection disk, and the first pulley and the second pulley are connected by a synchronous belt in transmission, and a to-be-inspected cam disk is placed on the cam quality inspection disk;

[0006] A second support frame is fixedly connected to the inspection tool frame, the second support frame is located above the first support frame, a contour comparison disk is rotatably connected to the second support frame, a third pulley is fixedly connected to the upper end of the output shaft of the double-headed motor, and a fourth pulley is fixedly connected below the contour comparison disk;

[0007] The inspection tool frame is provided with a contour detection mechanism, and the contour detection mechanism includes a hollow tube, the hollow tube is fixedly connected to the inspection tool frame, a push spring is provided in the hollow tube, a telescopic connecting rod is also inserted in the hollow tube, the telescopic connecting rod is located outside the push spring, the end of the telescopic connecting rod is fixedly connected to a vertical rod, the upper end of the vertical rod is rotatably connected to a first magnetic wheel, and the lower end of the vertical rod is rotatably connected to a second magnetic wheel.

[0008] Furthermore, a large number of rubber rollers are densely arranged on the cam quality inspection disk, and the axes of the large number of rubber rollers are tangent to the concentric circles of the cam quality inspection disk, so that the cam disk to be inspected can be more easily separated from the cam quality inspection disk.

[0009] Furthermore, the contour of the contour control disk is consistent with the contour of a standard cam disk, and is used to perform contour detection on the cam disk to be inspected.

[0010] Furthermore, the cam disk to be inspected is provided with multiple groups of positioning holes, the contour control disk is provided with at least two positioning pins, and the vertical projections of the positioning pins coincide with different corresponding positioning holes of the cam disk to be inspected, and the positioning pin sleeve is provided with a reset spring, which pushes the positioning pin upward, thereby facilitating the positioning of the clamping position and angle of the cam disk to be inspected.

[0011] Furthermore, the contour detection mechanism is provided with at least two groups, and each group of contour detection mechanisms includes at least two groups of hollow tubes, push springs and telescopic connecting rods, and the multiple groups of telescopic connecting rods are parallel to each other, and the vertical rod is perpendicular to the cam quality inspection disk and the contour comparison disk, so that the contour of the contour comparison disk is used to detect the contour of the cam disk to be inspected.

[0012] Furthermore, the first magnetic wheel and the second magnetic wheel in the contour detection mechanism are both permanent magnets, the first magnetic wheel is tightly attached to the edge of the contour comparison disk, and the second magnetic wheel is tightly attached to the edge of the cam disk to be inspected, so that the edges of the contour comparison disk and the cam disk to be inspected are always tightly attached to the first magnetic wheel and the second magnetic wheel.

[0013] Furthermore, a center hole is opened at the center of the cam disc to be inspected, and a center alignment hole is opened at the center of the cam quality inspection disc, and the center hole and the center alignment hole correspond to each other.

[0014] Further, a central sleeve is rotatably connected inside the central alignment hole. The top end of the central sleeve is rotatably connected to a constant-force clamping block through a rotating shaft. There are four groups of the constant-force clamping blocks, and the constant-force clamping blocks are in close contact with the inner wall of the central hole of the cam disk to be inspected. The constant-force clamping block is rotatably connected to a push-pull connecting rod through a rotating shaft. The push-pull connecting rod is rotatably connected to a central rod through a rotating shaft. A central rod positioning mechanism is arranged between the central rod and the central sleeve. An emergency stop switch is arranged below the inspection tool frame. The emergency stop switch controls the on-off of the main circuit of the double-headed motor. The emergency stop switch is located at the lower end of the central rod, so that the double-headed motor can be quickly turned off after the cam disk to be inspected deviates from the center.

[0015] Further, the central rod positioning mechanism is arranged in a cross shape around the central rod in four groups. The central rod positioning mechanism includes a first rotating shaft. The central rod is rotatably connected to a spring tube through the first rotating shaft. A compression spring is arranged inside the spring tube. A telescopic rod is arranged outside the compression spring. A second rotating shaft is arranged on the inner wall of the central sleeve. The end of the telescopic rod is rotatably connected to the second rotating shaft, and the second rotating shaft is located at the midpoint of the upper and lower movement limit heights of the first rotating shaft, so as to push the central rod to move and be positioned.

[0016] Further, a brake bent rod is fixedly connected to the central rod. A brake block is fixedly connected to the end of the brake bent rod. The brake block is located above the edge of the cam quality inspection disk, so as to quickly stop the rotation of the cam quality inspection disk after the cam disk to be inspected deviates from the center.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. For an evaporator cam disk inspection tool of the present invention, by adopting the rotation of the cam quality inspection disk and the contour comparison disk, and cooperating with the contour detection mechanism, while the cam disk to be inspected rotates, the first magnetic wheel and the second magnetic wheel are respectively in close contact with the edges of the cam quality inspection disk and the cam disk to be inspected. If the contour of the cam disk to be inspected does not conform to the standard contour of the contour comparison disk, the second magnetic wheel will push or pull the cam disk to be inspected, so that the center of gravity of the cam disk to be inspected deviates from the rotation center of the cam quality inspection disk. In this way, a centrifugal force will be generated when the cam disk to be inspected rotates, and the unqualified cam disk to be inspected will be thrown out, realizing the rapid clamping, rapid contour detection and rapid disassembly of the cam disk to be inspected.

[0019] 2. The cam disk inspection tool of the present invention is an evaporator. Through the rotation of the cam quality inspection disk, a virtual clamping of the cam quality inspection disk is carried out from the center by using a constant force clamping block. The clamping force is small. Once the center of gravity of the cam disk to be inspected deviates from its center hole, the cam disk will be thrown out, thus introducing a center of gravity detection in the inspection of the cam disk. Once the contour of the cam disk is unqualified, or there are defects such as uneven pouring during pouring, or problems such as unqualified dimensions during processing, all of these will cause its center of gravity to deviate from the designed center of gravity and can be detected, and multiple defects can be detected simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the clamping structure of the cam disk to be inspected of the present invention;

[0022] Figure 3 It is a schematic diagram of the side view structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the cam quality inspection disk of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the cam disk to be inspected of the present invention;

[0025] Figure 6 It is a schematic diagram of the clamping structure of the constant force clamping block of the present invention;

[0026] Figure 7 It is a schematic diagram of the loosening structure of the constant force clamping block of the present invention.

[0027] Reference numerals in the figures: 1, inspection tool frame; 2, first support frame; 3, cam quality inspection disk; 301, rubber roller; 302, center alignment hole; 4, double-headed motor; 5, first pulley; 6, second pulley; 7, cam disk to be inspected; 701, positioning hole; 702, center hole; 8, second support frame; 9, contour comparison disk; 901, positioning pin; 902, return spring; 10, third pulley; 11, fourth pulley; 12, contour detection mechanism; 1201, hollow tube; 1202, push spring; 1203, telescopic connecting rod; 1204, vertical rod; 1205, first magnetic wheel; 1206, second magnetic wheel; 13, center sleeve; 14, constant force clamping block; 15, push-pull connecting rod; 16, center rod; 17, center rod positioning mechanism; 1701, first rotating shaft; 1702, spring tube; 1703, pressure spring; 1704, telescopic rod; 1705, second rotating shaft; 18, emergency stop switch; 19, brake bent rod; 20, brake block. DETAILED DESCRIPTION OF THE INVENTION

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] To further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings.

[0030] Combined with Figure 1 - Figure 4 , an evaporator cam disc inspection fixture, including an inspection fixture frame 1, a first support frame 2 fixedly connected to the inspection fixture frame 1, a cam quality inspection disc 3 rotatably connected to the first support frame 2, a to-be-inspected cam disc 7 placed on the cam quality inspection disc 3, a large number of rubber rollers 301 densely arranged on the cam quality inspection disc 3, and the axes of the large number of rubber rollers 301 are tangent to the concentric circles of the cam quality inspection disc 3. In this way, the tangential friction force of the rubber rollers 301 on the to-be-inspected cam disc 7 can be increased, and at the same time, the radial friction force of the rubber rollers 301 on the to-be-inspected cam disc 7 can be reduced. Thus, when the cam quality inspection disc 3 rotates, the to-be-inspected cam disc 7 is not prone to slipping, and when the to-be-inspected cam disc 7 deviates from the center, it is more likely to be thrown out, making the detection accuracy higher.

[0031] Please refer to Figure 2 and Figure 3 , a double-headed motor 4 is fixedly installed on the inspection fixture frame 1, a first pulley 5 is fixedly connected to the lower end of the output shaft of the double-headed motor 4, a second pulley 6 is fixedly connected below the cam quality inspection disc 3, the first pulley 5 and the second pulley 6 are connected by a synchronous belt, a second support frame 8 is fixedly connected to the inspection fixture frame 1, the second support frame 8 is located above the first support frame 2, a contour comparison disc 9 is rotatably connected to the second support frame 8, the contour of the contour comparison disc 9 is consistent with the contour of the standard cam disc, a third pulley 10 is fixedly connected to the upper end of the output shaft of the double-headed motor 4, and a fourth pulley 11 is fixedly connected below the contour comparison disc 9. Thus, the double-headed motor 4 can drive the cam quality inspection disc 3 and the contour comparison disc 9 to rotate synchronously.

[0032] Such as Figure 3As shown, a profile detection mechanism 12 is provided on the fixture frame 1. The profile detection mechanism 12 includes a hollow tube 1201, which is fixedly connected to the fixture frame 1. A pushing spring 1202 is arranged inside the hollow tube 1201. A telescopic connecting rod 1203 is also inserted into the hollow tube 1201. The telescopic connecting rod 1203 is located outside the pushing spring 1202. A vertical rod 1204 is fixedly connected to the end of the telescopic connecting rod 1203. A first magnetic wheel 1205 is rotatably connected to the upper end of the vertical rod 1204, and a second magnetic wheel 1206 is rotatably connected to the lower end of the vertical rod 1204. In this way, when the cam quality inspection disc 3 and the profile comparison disc 9 rotate synchronously, the pushing spring 1202 pushes the first magnetic wheel 1205 to closely adhere to the edge of the profile comparison disc 9. When the profile comparison disc 9 rotates, the first magnetic wheel 1205 will fit with the profile of the profile comparison disc 9.

[0033] Each set of the profile detection mechanism 12 includes at least two sets of hollow tubes 1201, pushing springs 1202 and telescopic connecting rods 1203, and the multiple telescopic connecting rods 1203 are parallel to each other. The vertical rod 1204 is perpendicular to the cam quality inspection disc 3 and the profile comparison disc 9. In this way, the second magnetic wheel 1206 will also fit with the profile of the profile comparison disc 9. Once the profile of the cam disc 7 to be inspected protrudes from the profile of the profile comparison disc 9, the second magnetic wheel 1206 will push the cam disc 7 to be inspected outwards, causing the center of gravity of the cam disc 7 to deviate from its rotation center, and then using the centrifugal force to throw out the unqualified cam disc 7 to be inspected.

[0034] Both the first magnetic wheel 1205 and the second magnetic wheel 1206 in the profile detection mechanism 12 are permanent magnets. The first magnetic wheel 1205 is closely attached to the edge of the profile comparison disc 9, and the second magnetic wheel 1206 is closely attached to the edge of the cam disc 7 to be inspected. In this way, when the profile of the cam disc 7 to be inspected is concave and inconsistent with the profile comparison disc 9, the second magnetic wheel 1206 can pull the cam disc 7 to be inspected through magnetic force, causing the center of gravity of the cam disc 7 to deviate from its rotation center, and then using the centrifugal force to throw out the unqualified cam disc 7 to be inspected.

[0035] As Figure 5 shown, multiple sets of positioning holes 701 are provided on the cam disc 7 to be inspected. At least two positioning pins 901 are provided on the profile comparison disc 9, and the vertical projections of the positioning pins 901 coincide with different corresponding positioning holes 701 of the cam disc 7 to be inspected. A return spring 902 is sleeved outside the positioning pins 901. In this way, when clamping the cam disc 7 to be inspected, the positioning pins 901 can be pressed down and inserted into the corresponding positioning holes 701 on the cam disc 7 to be inspected. At least two sets of the profile detection mechanism 12 are provided, and the two positioning pins 901 can achieve precise positioning of the cam disc 7 to be inspected. After completion, the return spring 902 pushes the positioning pins 901 upwards to withdraw from the positioning holes 701, without affecting the rotation of the profile comparison disc 9.

[0036] A central hole 702 is provided in the center of the cam disk 7 to be inspected, and a central alignment hole 302 is provided in the center of the cam quality inspection disk 3. The central hole 702 and the central alignment hole 302 correspond to each other. A central sleeve 13 is rotatably connected in the central alignment hole 302. The top end of the central sleeve 13 is rotatably connected to a constant force clamping block 14 through a rotating shaft. There are four groups of constant force clamping blocks 14, and the constant force clamping block 14 is in close contact with the inner wall of the central hole 702 of the cam disk 7 to be inspected. The constant force clamping block 14 is rotatably connected to a push-pull connecting rod 15 through a rotating shaft. The push-pull connecting rod 15 is rotatably connected to a central rod 16 through a rotating shaft. A central rod positioning mechanism 17 is provided between the central rod 16 and the central sleeve 13. In this way, when the cam disk 7 to be inspected is pushed or pulled by the second magnetic wheel 1206, or the cam disk is unevenly cast, resulting in its center of gravity deviating from the rotation center, a centrifugal force will be generated, pressing down the constant force clamping block 14, and further causing the cam disk 7 to be inspected to deviate from the center.

[0037] As Figure 6 and Figure 7 shown, the central rod positioning mechanism 17 is arranged in a cross shape around the central rod 16 with four groups. The central rod positioning mechanism 17 includes a first rotating shaft 1701. The central rod 16 is rotatably connected to a spring tube 1702 through the first rotating shaft 1701. A compression spring 1703 is arranged in the spring tube 1702. A telescopic rod 1704 is arranged outside the compression spring 1703. A second rotating shaft 1705 is arranged on the inner wall of the central sleeve 13. The end of the telescopic rod 1704 is rotatably connected to the second rotating shaft 1705, and the second rotating shaft 1705 is located at the midpoint of the upper and lower movement limit heights of the first rotating shaft 1701. In this way, when the first rotating shaft 1701 moves downward to the same height as the second rotating shaft 1705, the clamping force of the constant force clamping block 14 disappears instantly, avoiding affecting the movement of the cam disk 7 to be inspected. In this way, the clamping force of the constant force clamping block 14 is also determined by the elastic force of the compression spring 1703.

[0038] An emergency stop switch 18 is provided below the inspection tool frame 1. The emergency stop switch 18 controls the on-off of the main circuit of the double-headed motor 4. The emergency stop switch 18 is located at the lower end of the central rod 16. In addition, the central rod 16 is fixedly connected to a brake bent rod 19. The end of the brake bent rod 19 is fixedly connected to a brake block 20. The brake block 20 is located above the edge of the cam quality inspection disk 3. In this way, when the cam disk 7 to be inspected slightly deviates from the center and presses down the constant force clamping block 14, the central rod 16 will push and close the emergency stop switch 18, stopping the power supply to the double-headed motor 4, so that the cam quality inspection disk 3 loses the power to rotate. At the same time, the brake block 20 will also press down to contact the cam quality inspection disk 3 for braking, so that the cam quality inspection disk 3 stops quickly, preventing the subsequent rotation of the cam quality inspection disk 3 from causing too large a centrifugal force on the cam disk 7 to be inspected, resulting in the cam disk 7 to be inspected being quickly thrown out and causing danger.

[0039] Working principle: When an evaporator cam disc inspection fixture is working, first place the cam disc 7 to be inspected on the cam quality inspection disc 3, and make the fixed force clamping block 14 clamped on the inner wall of the center hole 702 of the cam disc 7 to be inspected. At the same time, press the positioning pin 901 on the contour reference disc 9 and insert it into the corresponding positioning hole 701 on the cam disc 7 to be inspected, so that the angle of the cam disc 7 to be inspected is consistent with the angle of the contour reference disc 9.

[0040] Then start the double-headed motor 4 to drive the cam inspection disk 3 and the contour comparison disk 9 to rotate synchronously. Since the axis of the rubber roller 301 of the cam inspection disk 3 is tangent to the concentric circle of the cam inspection disk 3, the tangential friction force of the rubber roller 301 on the cam disk 7 to be inspected can be increased to prevent the cam disk 7 to be inspected from slipping when rotating. At the same time, the radial friction force of the rubber roller 301 on the cam disk 7 to be inspected is reduced, so that when the cam disk 7 to be inspected deviates from the center, it is easier to be thrown out.

[0041] In this way, once the cam disc 7 to be tested is insufficiently cast, the center of gravity will deviate from its rotation center, thereby generating centrifugal force. When the error of the cam disc 7 to be tested exceeds the allowable range of its process, the clamping force of the cam disc 7 to be tested will be greater than the clamping force of the fixed force clamping block 14, thereby pushing the fixed force clamping block 14 to rotate around the rotating axis and retract into the center alignment hole 302, thereby causing the cam disc 7 to be thrown out, thereby realizing the dynamic balance detection of the moving cam disc.

[0042] When the contour comparison disk 9 rotates, the first magnetic wheel 1205 is pushed by the push spring 1202 to fit closely to the contour of the contour comparison disk 9, and the second magnetic wheel 1206 is simultaneously pushed closely to the edge of the cam disk 7 to be inspected. In this way, when the contour of the cam disk 7 to be inspected is concave and inconsistent with the contour comparison disk 9, the second magnetic wheel 1206 can pull the cam disk 7 to be inspected by magnetic force, so that the center of gravity of the cam disk 7 to be inspected deviates from its rotation center, and then the unqualified cam disk 7 to be inspected is thrown out by centrifugal force. When the contour of the cam disk 7 to be inspected protrudes from the contour of the contour comparison disk 9, the second magnetic wheel 1206 will push the cam disk 7 to be inspected outward, so that the center of gravity of the cam disk 7 to be inspected deviates from its rotation center, and then the unqualified cam disk 7 to be inspected is thrown out by centrifugal force, thereby realizing contour detection.

[0043] In addition, when the cam disk 7 to be inspected deviates slightly from the center and the fixed force clamping block 14 is pressed down, the center rod 16 will turn off the emergency stop switch 18, interrupting the power supply of the double-headed motor 4. At the same time, the brake block 20 will also press down to brake the cam inspection disk 3 to make it stop as soon as possible. This can prevent the centrifugal force of the cam disk 7 to be inspected from being too large and being thrown out to cause danger.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An evaporator cam plate inspection fixture, comprising a inspection fixture frame (1), characterized in that: The inspection fixture frame (1) is fixedly connected to a first support frame (2), a cam quality inspection disk (3) is rotatably connected to the first support frame (2), a double-headed motor (4) is fixedly mounted on the inspection fixture frame (1), a first pulley (5) is fixedly connected to the lower end of the output shaft of the double-headed motor (4), a second pulley (6) is fixedly connected below the cam quality inspection disk (3), the first pulley (5) and the second pulley (6) are connected via a synchronous belt drive, and a cam disk (7) to be inspected is placed on the cam quality inspection disk (3); The inspection fixture frame (1) is fixedly connected to a second support frame (8), the second support frame (8) is located above the first support frame (2), a contour comparison disk (9) is rotatably connected to the second support frame (8), a third pulley (10) is fixedly connected to the upper end of the output shaft of the double-headed motor (4), and a fourth pulley (11) is fixedly connected to the lower side of the contour comparison disk (9); The inspection tool frame (1) is provided with a contour detection mechanism (12), the contour detection mechanism (12) comprising a hollow tube (1201), the hollow tube (1201) being fixedly connected to the inspection tool frame (1), a push spring (1202) being provided in the hollow tube (1201), a telescopic connecting rod (1203) being inserted into the hollow tube (1201), the telescopic connecting rod (1203) being located outside the push spring (1202), a vertical rod (1204) being fixedly connected at the end thereof, a first magnetic wheel (1205) being rotatably connected to the upper end of the vertical rod (1204), and a second magnetic wheel (1206) being rotatably connected to the lower end of the vertical rod (1204); The first magnetic wheel (1205) and the second magnetic wheel (1206) in the contour detection mechanism (12) are both permanent magnets, the first magnetic wheel (1205) is in close contact with the edge of the contour comparison disk (9), and the second magnetic wheel (1206) is in close contact with the edge of the cam disk (7) to be detected; The center of the cam disc (7) to be inspected is provided with a center hole (702), and the center of the cam quality inspection disc (3) is provided with a center alignment hole (302). The center hole (702) corresponds to the center alignment hole (302). A center sleeve (13) is rotatably connected in the center alignment hole (302). The top of the center sleeve (13) is rotatably connected to a fixed force clamping block (14) via a rotating shaft. Four groups of the fixed force clamping blocks (14) are provided, and the fixed force clamping blocks (14) are closely attached to the cam disc (7) to be inspected. The inner wall of the center hole (702) is provided with a push-pull connecting rod (15) rotatably connected to the rotating shaft of the fixed force clamping block (14), and the push-pull connecting rod (15) is rotatably connected to the center rod (16) through the rotating shaft. A center rod positioning mechanism (17) is provided between the center rod (16) and the center sleeve (13). An emergency stop switch (18) is provided below the inspection fixture frame (1), and the emergency stop switch (18) controls the main circuit of the double-headed motor (4) to be turned on and off. The emergency stop switch (18) is located at the lower end of the center rod (16).

2. The evaporator cam plate inspection fixture according to claim 1, characterized in that: A large number of rubber rollers (301) are densely arranged on the cam quality inspection disk (3), and the axes of the large number of rubber rollers (301) are tangent to the concentric circles of the cam quality inspection disk (3).

3. The evaporator cam plate inspection fixture according to claim 1, characterized in that: The profile of the profile comparison disc (9) is consistent with the profile of a standard cam disc.

4. The evaporator cam plate inspection fixture according to claim 1, characterized in that: The cam disc to be inspected (7) is provided with a plurality of groups of positioning holes (701), the contour comparison disc (9) is provided with at least two positioning pins (901), and the vertical projections of the positioning pins (901) coincide with different corresponding positioning holes (701) of the cam disc to be inspected (7), and the outer sleeve of the positioning pin (901) is provided with a return spring (902), and the return spring (902) pushes the positioning pin (901) upward.

5. The evaporator cam plate inspection fixture according to claim 1, characterized in that: At least two groups of the contour detection mechanisms (12) are provided, and each group of the contour detection mechanisms (12) includes at least two groups of hollow tubes (1201), a push spring (1202) and a telescopic connecting rod (1203), and the multiple groups of telescopic connecting rods (1203) are parallel to each other, and the vertical rod (1204) is perpendicular to the cam quality inspection disk (3) and the contour comparison disk (9).

6. The evaporator cam plate inspection fixture according to claim 1, characterized in that: The center rod positioning mechanism (17) is cross-shaped and has four groups arranged around the center rod (16). The center rod positioning mechanism (17) comprises a first rotating shaft (1701). The center rod (16) is rotatably connected to a spring tube (1702) via the first rotating shaft (1701). A pressure spring (1703) is arranged inside the spring tube (1702). A telescopic rod (1704) is arranged outside the pressure spring (1703). A second rotating shaft (1705) is arranged on the inner wall of the center sleeve (13). The end of the telescopic rod (1704) is rotatably connected to the second rotating shaft (1705), and the second rotating shaft (1705) is located at the middle point of the upper and lower movement limit height of the first rotating shaft (1701).

7. The evaporator cam plate inspection fixture according to claim 1, characterized in that: The central rod (16) is fixedly connected to a brake curved rod (19), and the end of the brake curved rod (19) is fixedly connected to a brake block (20), and the brake block (20) is located above the edge of the cam quality inspection disk (3).

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