An electronic thermostat fault testing device

Abstract

This invention relates to the field of fault testing technology, specifically to an electronic thermostat fault testing device, comprising: a machine base, and a lifting plate fixed within the machine base, a support plate fixed to the lifting plate, and a side plate fixed to the support plate; a telescopic mechanism disposed on the lifting plate, the telescopic mechanism having a pressing clamping assembly, the pressing clamping assembly being connected to a plurality of circumferentially equidistant limiting wheels, the telescopic mechanism being able to adjust the distance between the limiting wheels through the pressing clamping assembly to perform a pressing clamping action on the thermostat; and a pushing mechanism disposed on the side plate, the pushing mechanism having a positioning insertion mechanism, the positioning insertion mechanism being connected to a insertion contact, the cooperation of the pushing mechanism and the positioning insertion mechanism being able to correct the thermostat in an angularly offset state to ensure precise insertion of the insertion contact and ensure the accuracy of the test results.

Description

Technical Field

[0001] This invention relates to the field of fault testing technology, specifically to an electronic thermostat fault testing device. Background Technology

[0002] Electronic thermostats are key components in the thermal management systems of modern automotive engines. They integrate heating resistors, temperature sensing elements, and valve mechanisms. The electronic control unit controls the heating resistors to be energized, causing the temperature sensing elements to expand due to heat, which in turn drives the valves to open, thus achieving precise control over the circulation path of the engine coolant.

[0003] In the manufacturing, repair, and testing of electronic thermostats, fault testing is a crucial step in ensuring their reliability. The main testing involves energizing the heating resistor inside the thermostat to simulate the valve's opening characteristics under different temperature conditions. This tests whether the valve opens normally within the specified temperature range, whether the opening stroke meets design requirements, and whether the valve can reliably close after power is cut off.

[0004] During the test, the test device's plug-in head needs to be connected to the thermostat's connecting head to establish an electrical connection. In the existing technology, a clamp is usually used to fix the thermostat at the test station, and then the test plug is guided into the thermostat's connecting head by a cylinder. After that, the power is turned on and the heating test is performed.

[0005] However, most existing clamps use radial clamping. During the clamping process, uneven force on the contact points between the jaws and the housing can easily cause the thermostat to deflect slightly along its own axis. This can lead to misalignment between the axis of the contact head and the axis of the test plug. If the test plug is directly and rigidly pushed for insertion, insertion failure or collision between the plug and the edge of the contact head will occur. This not only affects the testing efficiency but may also damage the connection interface of the contact head or the thermostat. Summary of the Invention

[0006] The purpose of this invention is to provide an electronic thermostat fault testing device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An electronic thermostat fault testing device, comprising: The machine base, and a lifting plate fixed inside the machine base, a support plate fixed on the lifting plate, and a side plate fixed on the support plate; Also includes: A telescopic mechanism is provided on the lifting plate. The telescopic mechanism is provided with a pressing and clamping assembly. The pressing and clamping assembly is connected to a plurality of limit wheels that are circumferentially distributed. The telescopic mechanism can adjust the distance between the limit wheels through the pressing and clamping assembly to perform a pressing and clamping action on the thermostat. A pushing mechanism is provided on the side plate. The pushing mechanism is equipped with a positioning and plugging mechanism, and a plugging contact is connected to the positioning and plugging mechanism. The pushing mechanism can correct the thermostat through the positioning and plugging mechanism and control the plugging contact to perform a plugging test action.

[0008] As a further embodiment of the present invention: the telescopic mechanism includes a clamp fixed on the lifting plate, a toothed ring rotatably mounted inside the clamp, and a rotating tooth meshing with the toothed ring is also rotatably mounted inside the clamp.

[0009] As a further embodiment of the present invention: the telescopic mechanism further includes a vortex disk fixed on the toothed ring, a plurality of first sliding grooves are formed on the support plate and are distributed circumferentially, a plurality of second sliding grooves are formed on the clamp and are distributed circumferentially, a sliding plate that is fitted with the vortex disk is slidably installed in the second sliding groove, and a fixing plate that passes through the first sliding groove is fixed on the sliding plate.

[0010] As a further embodiment of the present invention: the pressing clamping assembly includes a deflecting rod hinged to the fixed plate, the deflecting rod being rotatably connected to the limiting wheel, a slot being formed on the deflecting rod, a spring telescopic rod being fixed on the sliding plate, and a limiting post being fixed at the end of the spring telescopic rod and slidingly engaging with the slot.

[0011] As a further embodiment of the present invention: the pushing mechanism includes guide columns fixed on the side plate and symmetrically distributed, a movable sleeve slidingly on the guide column, a connecting column fixed on the side wall of the movable sleeve, a cylinder fixed on the inner wall of the machine base, and the telescopic end of the cylinder fixedly connected to the movable sleeve. It also includes a follower component and a limiting component disposed on the guide post and connected to the connecting post.

[0012] As a further embodiment of the present invention: the follower component includes a guide sleeve slidably mounted on the guide post, a receiving plate fixed at the end of the guide sleeve, a support spring sleeved on the guide post, and the two ends of the support spring abutting against the receiving plate and the movable sleeve, respectively.

[0013] As a further embodiment of the present invention: the limiting component includes a connecting plate fixed on the receiving plate, the connecting plate having a through groove formed thereon, the through groove being slidably connected to the connecting post.

[0014] As a further embodiment of the present invention: the positioning and insertion mechanism includes a movable plate fixed to the side wall of the guide sleeve, the movable plate being fixedly connected to the insertion contact head, and a third sliding groove symmetrically distributed on the movable plate, wherein a sliding block is slidably installed in the third sliding groove; It also includes an adjustment component and a correction component disposed on the sliding block and connected to the movable sleeve.

[0015] As a further embodiment of the present invention: the adjusting assembly includes a push plate fixed to the side wall of the movable sleeve, and the push plate is hinged with connecting rods that are symmetrically distributed and hinged to the sliding block.

[0016] As a further embodiment of the present invention: the correction assembly includes a follower plate fixed to the side wall of the sliding block, and a limit rod is fixed on the follower plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention achieves adaptive positioning and clamping of the thermostat through the cooperation of the telescopic mechanism and the downward clamping assembly. The telescopic mechanism drives three sliding plates to move inward synchronously through the vortex disk, which drives the limiting wheel to retract radially, automatically correcting the thermostat to the position of the central axis of the support plate, completing precise center positioning. Subsequently, as the sliding plates continue to move inward, the horizontal thrust is converted into a vertical thrust by the deflector rod, which causes the limiting wheel to roll downward along the outer wall of the thermostat, applying uniform downward pressure to the thermostat, so that its end face is tightly attached to the support plate, thereby ensuring the precise position of the contact head in the vertical direction.

[0018] By coordinating the driving mechanism and the positioning and insertion mechanism, automatic correction and reliable insertion are achieved when the thermostat experiences resistance during insertion. When the thermostat deflects at an angle due to force deviation during clamping, causing misalignment between the connecting contact head and the insertion contact head, the end of the insertion contact head abuts against the end face of the connecting contact head, forming resistance. At this time, the movable sleeve continues to move and forms a relative displacement with the guide sleeve. Under the action of the positioning and insertion mechanism, the two limit rods are controlled to move towards the center, contact the outer wall of the connecting contact head housing, and apply radial correction force to guide the connecting contact head to be aligned. In this way, a three-stage insertion mechanism of "first insertion resistance, then automatic correction, and finally insertion completion" can be realized, ensuring that even if there is a slight angular deviation in the thermostat, the insertion process can still be completed smoothly, avoiding insertion failure or damage to the insertion parts due to misalignment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of an electronic thermostat fault testing device.

[0020] Figure 2 This is a schematic diagram of the internal structure of the machine tool in one embodiment of an electronic thermostat fault testing device.

[0021] Figure 3 This is a schematic diagram showing the connection relationship of some of the telescopic mechanism, pressing clamping assembly, pushing mechanism, and positioning insertion mechanism in one embodiment of an electronic thermostat fault testing device.

[0022] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0023] Figure 5 This is a schematic diagram of the telescopic mechanism and the downward clamping assembly in one embodiment of an electronic thermostat fault testing device.

[0024] Figure 6 This is a cross-sectional structural diagram of the clamp in one embodiment of an electronic thermostat fault testing device.

[0025] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0026] Figure 8 This is a schematic diagram of the pushing mechanism and the positioning insertion mechanism in one embodiment of an electronic thermostat fault testing device.

[0027] Figure 9 This is a top view of the pushing mechanism and positioning insertion mechanism in one embodiment of an electronic thermostat fault testing device.

[0028] Figure 10 This is an exploded structural diagram of part of the pushing mechanism and part of the positioning and insertion mechanism in one embodiment of an electronic thermostat fault testing device.

[0029] In the diagram: 1. Machine base; 2. Lifting plate; 3. Support plate; 301. First slide groove; 4. Clamp; 401. Second slide groove; 5. Gear ring; 501. Vortex disk; 6. Rotating gear; 7. Sliding plate; 8. Fixed plate; 9. Bias rod; 901. Slot; 10. Limiting wheel; 11. Spring telescopic rod; 12. Limiting post; 13. Side plate; 14. Cylinder; 15. Guide post; 16. Movable sleeve; 17. Support spring; 18. Guide sleeve; 1801. Receiving plate; 19. Connecting post; 20. Connecting plate; 2001. Through groove; 21. Push plate; 22. Movable plate; 2201. Third slide groove; 23. Sliding block; 24. Connecting rod; 25. Follower plate; 2501. Limiting rod; 26. Insert contact head. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0032] Please see Figures 1-10 In this embodiment of the invention, an electronic thermostat fault testing device includes: The machine base 1 and the lifting plate 2 fixed inside the machine base 1, the lifting plate 2 is fixed with a support plate 3, and the support plate 3 is fixed with a side plate 13. Also includes: A telescopic mechanism is provided on the lifting plate 2. The telescopic mechanism is provided with a pressing clamping assembly. The pressing clamping assembly is connected to a plurality of circumferentially distributed limiting wheels 10. The telescopic mechanism can adjust the distance between the limiting wheels 10 through the pressing clamping assembly to perform a pressing clamping action on the thermostat. A pushing mechanism is provided on the side plate 13. The pushing mechanism is provided with a positioning and plugging mechanism. A plugging contact 26 is connected to the positioning and plugging mechanism. The pushing mechanism can correct the thermostat through the positioning and plugging mechanism and control the plugging contact 26 to perform a plugging test action.

[0033] Specifically, when performing a fault test on the thermostat, it is necessary to connect it to electricity and control the heating of the resistance wire inside the thermostat to observe whether the valve can open normally when the temperature changes, and whether the valve opening degree is within the set range. Before the test, a robotic arm can be used to place the thermostat on the support plate 3. Simultaneously, the telescopic mechanism operates, and multiple limit wheels 10 are controlled by the downward clamping assembly to move towards each other. When the limit wheels 10 abut against the outer circumference of the thermostat, the thermostat completes center positioning. The telescopic mechanism continues to move, and the downward clamping assembly and limit wheels 10 provide a certain downward pressure on the thermostat to ensure temperature control. The end of the device is tightly fitted to the support plate 3. Then, under the action of the pushing mechanism, the positioning and plugging mechanism controls the plug contact 26 to move towards the thermostat connecting contact. Since the thermostat may be slightly deflected along its own axis during the placement of the thermostat on the support plate 3 and the positioning of the limiting wheel 10, the plug contact 26 and the connecting contact may be misaligned. If the thermostat is misaligned, the positioning and plugging mechanism will operate when the plug contact 26 and the connecting contact come into contact, and correct and align the connecting contact to ensure that the plug contact 26 can be smoothly inserted into the connecting contact. Then, the device is powered on and heated to complete the subsequent fault test.

[0034] Please see Figure 2 , Figure 3 , Figure 5 , Figure 6 The telescopic mechanism includes a clamp 4 fixed on the lifting plate 2, a toothed ring 5 rotatably mounted inside the clamp 4, and a rotating tooth 6 that meshes with the toothed ring 5 rotatably mounted inside the clamp 4. The telescopic mechanism also includes a vortex disk 501 fixed on the toothed ring 5. A plurality of first sliding grooves 301 are formed on the support plate 3 in a circumferentially equidistant manner. A plurality of second sliding grooves 401 are formed on the clamp 4 in a circumferentially equidistant manner. A sliding plate 7 that engages with the vortex disk 501 is slidably mounted inside the second sliding groove 401. A fixing plate 8 that penetrates the first sliding groove 301 is fixed on the sliding plate 7.

[0035] Please see Figures 5-7 The downward clamping assembly includes a swing rod 9 hinged to the fixed plate 8, the swing rod 9 being rotatably connected to the limiting wheel 10, a slot 901 being formed on the swing rod 9, a spring telescopic rod 11 being fixed on the sliding plate 7, and a limiting post 12 being fixed at the end of the spring telescopic rod 11 and slidingly engaging with the slot 901.

[0036] In detail, the thermostat consists of a valve body, piping, connecting contact, temperature sensing element, etc. In order to ensure that subsequent fault testing can be carried out smoothly, the thermostat needs to be clamped and positioned to ensure that the connecting contact is in the position to be tested. Please see Figure 6 The first slide groove 301 is provided with three spring telescopic rods 11, which are elastically telescopic rods including hollow rods. A movable rod slides axially inside the hollow rod. The end of the movable rod is fixedly connected to the limiting post 12. A limiting groove is formed on the outer circumference of the hollow rod. A protrusion that slides and fits into the limiting groove is fixed on the outer circumference of the movable rod. Under the action of the protrusion and the limiting groove, the movable rod has a set telescopic stroke. A telescopic spring is sleeved on the hollow rod and the movable rod. The two ends of the telescopic spring abut against the limiting post 12 and the sliding plate 7, respectively. The extension of the telescopic spring in its natural state is greater than the maximum size of the hollow rod and the movable rod after combination. Therefore, the telescopic spring is in a pre-compressed state and always provides the limiting post 12 with a thrust in the direction away from the sliding plate 7. In the initial state, under the action of the vortex disk 501, the sliding plate 7 is located at the end of its stroke in the direction away from each other. At this time, the spring telescopic rod 11 is in the maximum extended state, so that the limiting post 12 is located at the end of its stroke in the direction away from the sliding plate 7. Under the action of the limiting post 12 and the slot 901, the included angle between the deflecting rod 9 and the fixed plate 8 is the largest. In this state, the distance between the three limiting wheels 10 is greater than the circumference diameter of the thermostat. When a fault test is required on the thermostat, the thermostat is placed on the support plate 3 by a robotic arm. During the placement process, the thermostat may experience slight positional shift or angular deflection due to the positioning error of the robotic arm or the picking and placing action. Subsequently, the rotating tooth 6 rotates, causing the toothed ring 5 meshing with it to rotate synchronously. The rotation of the toothed ring 5 causes the vortex disk 501 fixed on it to rotate. Under the action of the vortex profile of the vortex disk 501, the three sliding plates 7 slide smoothly along the second sliding groove 401 on the clamp 4 towards each other. The movement of the sliding plates 7 causes the fixed plate 8 and the deflecting rod 9 and the limiting wheel 10 connected to it to move closer to the center of the thermostat, so that the distance between the three limiting wheels 10 gradually decreases. When all three limiting wheels 10 are in contact with the outer circumference of the thermostat, the thermostat is pushed to the center position under the radial clamping action of the limiting wheels 10, completing the initial center positioning. If the thermostat initially has a positional offset, the synchronous inward movement of the limiting wheels 10 can automatically correct it to the center axis position of the support plate 3. After the center positioning is completed, the rotating gear 6 continues to rotate, driving the sliding plate 7 and the fixed plate 8 to continue to move towards each other. At this time, since the limiting wheel 10 has contacted the outer wall of the thermostat, the continued movement of the fixed plate 8 can no longer cause the limiting wheel 10 to produce radial displacement. Instead, the horizontal thrust is converted into a vertical thrust that causes the limiting wheel 10 to roll down along the outer wall of the thermostat through the deflecting rod 9. The deflecting rod 9 deflects around its hinge point with the fixed plate 8 towards the direction of approaching the fixed plate 8, driving the limiting wheel 10 to roll down along the outer wall of the thermostat. At the same time, through the sliding cooperation between the slot 901 and the limiting post 12, the telescopic spring in the spring telescopic rod 11 is compressed. As the limiting wheel 10 rolls downward, it applies downward pressure to the thermostat, causing the lower end face of the thermostat to fit tightly against the upper surface of the support plate 3. This eliminates any gaps in the thermostat in the vertical direction and ensures that the connecting contact is at the preset test height. In this way, through the two-stage clamping action of "first radial clamping and centering, then axial downward pressing and fitting", the thermostat is precisely centered while ensuring that its end face fits tightly against the support plate 3, providing a reliable positioning reference for the subsequent precise docking with the connecting contact.

[0037] Please see Figure 3 , Figure 4 , Figures 8-10 The pushing mechanism includes guide columns 15 fixed on the side plate 13 and symmetrically distributed. A movable sleeve 16 slides axially on the guide column 15. A connecting column 19 is fixed to the side wall of the movable sleeve 16. A cylinder 14 is fixed to the inner wall of the machine base 1. The telescopic end of the cylinder 14 is fixedly connected to the movable sleeve 16. The mechanism also includes a follower component and a limiting component disposed on the guide column 15 and connected to the connecting column 19. The follower component includes a guide sleeve 18 slidably mounted on the guide column 15. A receiving plate 1801 is fixed to the end of the guide sleeve 18. A support spring 17 is sleeved on the guide column 15. The two ends of the support spring 17 abut against the receiving plate 1801 and the movable sleeve 16, respectively. The limiting component includes a connecting plate 20 fixed on the receiving plate 1801. A through groove 2001 is formed on the connecting plate 20. The through groove 2001 is slidably connected to the connecting column 19.

[0038] Please see Figure 3 , Figure 4 , Figures 8-10The positioning and insertion mechanism includes a movable plate 22 fixed to the side wall of the guide sleeve 18, the movable plate 22 being fixedly connected to the insertion contact 26, and a third sliding groove 2201 symmetrically distributed on the movable plate 22, with a sliding block 23 slidably installed in the third sliding groove 2201; it also includes an adjustment component and a correction component disposed on the sliding block 23 and connected to the movable sleeve 16, the adjustment component including a push plate 21 fixed to the side wall of the movable sleeve 16, with connecting rods 24 symmetrically distributed and hinged to the push plate 21 and the sliding block 23, and the correction component including a follower plate 25 fixed to the side wall of the sliding block 23, with a limit rod 2501 fixed on the follower plate 25.

[0039] Please see Figure 8 Furthermore, in the initial state, under the action of the cylinder 14, the movable sleeve 16 is located at the end of its stroke away from the side plate 13, and the connecting column 19 is located at the end of its stroke on the side of the through groove 2001 away from the receiving plate 1801. In this case, the distance between the receiving plate 1801 and the movable sleeve 16 is the largest, and the elongation of the support spring 17 in its natural state is greater than the maximum distance between the receiving plate 1801 and the movable sleeve 16. In this case, the support spring 17 is in a pre-compressed state and always provides the receiving plate 1801 with a thrust in the direction away from the movable sleeve 16. In this state, the distance between the push plate 21 and the movable plate 22 is also at its maximum. Under the action of the connecting rod 24, the two sliding blocks 23 are located at the end of the stroke of the third slide groove 2201 on the side away from each other, so as to control the distance between the two limit rods 2501 to the maximum through the follower plate 25. When it is necessary to control the insertion contact 26 and the connecting contact to be inserted into each other, the cylinder 14 works, pushing the movable sleeve 16 to move along the guide post 15 toward the direction of the thermostat. The movement of the movable sleeve 16 drives the receiving plate 1801 and the guide sleeve 18 to move synchronously through the support spring 17. The movable sleeve 16 and the guide sleeve 18 respectively drive the push plate 21 and the movable plate 22 to move synchronously toward the thermostat. Since the initial distance between the push plate 21 and the movable plate 22 has not changed, the position of the sliding block 23 in the third slide groove 2201 remains fixed. The movable plate 22 drives the insertion contact 26 to move toward the connecting contact of the thermostat. If the thermostat does not shift in angle during placement and positioning by the limit wheel 10, and the connecting contact head and the insertion contact head 26 are in a coaxial alignment state, the insertion contact head 26 can be directly and smoothly inserted into the connecting contact head under the drive of the movable plate 22 to complete the electrical connection. After the connection is completed, the cylinder 14 stops operating. At this time, it can be powered on for heating. The valve's opening status and opening range when the temperature changes are observed through the heating of the internal resistance wire of the thermostat, and subsequent fault testing is completed. If the thermostat experiences a slight angular shift along its own axis during the positioning and clamping process due to uneven force or initial placement deviation, resulting in the misalignment of the connecting contact head and the insert contact head 26, then the insert contact head 26 will be unable to enter the connecting contact head, and its end will abut against the end face of the connecting contact head. At this time, the insert contact head 26 and the movable plate 22 will be blocked and stop moving forward, but the cylinder 14 will continue to push the movable sleeve 16 forward. The continued movement of the movable sleeve 16 causes the connecting column 19 to slide along the through groove 2001 on the connecting plate 20. At the same time, the distance between the movable sleeve 16 and the receiving plate 1801 gradually decreases, further compressing the support spring 17 which is in a pre-compressed state. The movement of the movable sleeve 16 drives the push plate 21 to continue forward, causing the distance between the push plate 21 and the movable plate 22 to gradually decrease. The movement of the push plate 21, through the connecting rod 24 hinged to it, drives the two sliding blocks 23 to slide along the third sliding groove 2201 on the movable plate 22 toward each other. The sliding block 23 drives the follower plate 25 and the limiting rod 2501 fixed thereon to move towards the center synchronously. When the two limiting rods 2501 contact the outer wall of the housing of the connecting contact head, under the symmetrical clamping action of the limiting rods 2501, a radial correction force is applied to the connecting contact head, guiding the connecting contact head to align around its own axis, so that the central axis of the connecting contact head is realigned with the central axis of the insert contact head 26. Once the connecting contact is corrected to the correct position, the obstruction between the insert contact 26 and the connecting contact is eliminated. At this time, the compressed support spring 17 releases its stored elastic potential energy, pushing the receiving plate 1801 and the guide sleeve 18 toward the direction closer to the movable sleeve 16. The guide sleeve 18 drives the insert contact 26 forward through the movable plate 22, so that the insert contact 26 can be smoothly inserted into the connecting contact, completing the electrical connection. Subsequently, power can be supplied for subsequent fault testing.

[0040] In summary, the two-stage insertion mechanism of "first insertion, automatic correction after obstruction, and then completion of insertion" ensures that when there is a slight angular deviation in the connecting contact, it can automatically detect and correct the deviation, thus ensuring reliable insertion between the insertion contact 26 and the connecting contact and avoiding insertion failure or damage to the connector due to misalignment.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electronic thermostat fault testing device, comprising: The machine base, and a lifting plate fixed inside the machine base, a support plate fixed on the lifting plate, and a side plate fixed on the support plate; Its characteristic is that it further includes: A telescopic mechanism is provided on the lifting plate. The telescopic mechanism is provided with a pressing and clamping assembly. The pressing and clamping assembly is connected to a plurality of limit wheels that are circumferentially distributed. The telescopic mechanism can adjust the distance between the limit wheels through the pressing and clamping assembly to perform a pressing and clamping action on the thermostat. A pushing mechanism is provided on the side plate. The pushing mechanism is equipped with a positioning and plugging mechanism, and a plugging contact is connected to the positioning and plugging mechanism. The pushing mechanism can correct the thermostat through the positioning and plugging mechanism and control the plugging contact to perform a plugging test action.

2. The electronic thermostat fault testing device according to claim 1, characterized in that, The telescopic mechanism includes a clamp fixed to the lifting plate, a toothed ring rotatably mounted inside the clamp, and a rotating tooth meshing with the toothed ring also rotatably mounted inside the clamp.

3. The electronic thermostat fault testing device according to claim 2, characterized in that, The telescopic mechanism further includes a vortex disk fixed on the toothed ring. The support plate has a plurality of first sliding grooves distributed circumferentially. The clamp has a plurality of second sliding grooves distributed circumferentially. A sliding plate that is fitted with the vortex disk is slidably installed in the second sliding groove. A fixing plate that passes through the first sliding groove is fixed on the sliding plate.

4. The electronic thermostat fault testing device according to claim 3, characterized in that, The downward clamping assembly includes a deflector rod hinged to the fixed plate, the deflector rod being rotatably connected to the limiting wheel, a slot being formed on the deflector rod, a spring telescopic rod being fixed on the sliding plate, and a limiting post being fixed at the end of the spring telescopic rod and slidingly engaging with the slot.

5. The electronic thermostat fault testing device according to claim 1, characterized in that, The pushing mechanism includes guide columns fixed on the side plate and symmetrically distributed. A movable sleeve slides axially on the guide column. A connecting column is fixed to the side wall of the movable sleeve. A cylinder is fixed to the inner wall of the machine base. The telescopic end of the cylinder is fixedly connected to the movable sleeve. It also includes a follower component and a limiting component disposed on the guide post and connected to the connecting post.

6. The electronic thermostat fault testing device according to claim 5, characterized in that, The follower assembly includes a guide sleeve slidably mounted on the guide post, a receiving plate fixed to the end of the guide sleeve, and a support spring sleeved on the guide post, with the two ends of the support spring abutting against the receiving plate and the movable sleeve, respectively.

7. The electronic thermostat fault testing device according to claim 6, characterized in that, The limiting component includes a connecting plate fixed on the receiving plate, and a through groove is formed on the connecting plate, the through groove being slidably connected to the connecting column.

8. The electronic thermostat fault testing device according to claim 6, characterized in that, The positioning and insertion mechanism includes a movable plate fixed to the side wall of the guide sleeve. The movable plate is fixedly connected to the insertion contact head. A third sliding groove is formed on the movable plate in a symmetrical distribution. A sliding block is slidably installed in the third sliding groove. It also includes an adjustment component and a correction component disposed on the sliding block and connected to the movable sleeve.

9. The electronic thermostat fault testing device according to claim 8, characterized in that, The adjusting assembly includes a push plate fixed to the side wall of the movable sleeve, and connecting rods that are symmetrically distributed and hinged to the sliding block are hinged to the push plate.

10. The electronic thermostat fault testing device according to claim 9, characterized in that, The correction assembly includes a follower plate fixed to the side wall of the sliding block, and a limit rod is fixed on the follower plate.

Images