Temperature switch accuracy detection system

Abstract

The invention discloses a temperature switch accuracy detection system which is characterized in that a temperature control groove used for detecting a temperature switch is formed in the middle of the top surface of a detection table, a cross beam is fixed above the detection table, a detection tool clamp used for clamping the temperature switch is arranged on the front side of the top surface of the detection table, and the detection tool clamp is provided with a detection sensor of the temperature switch; a screwing knife used for screwing a temperature switch adjusting bolt is vertically and movably connected to the end face of the front side of the cross beam and located over the detection tool clamp, the two ends of the cross beam are fixed to the detection table through supporting columns, the screwing knife is in transmission connection with the bottom of a servo motor, and the servo motor is vertically and movably connected with the cross beam through a lifting device. According to the structure, the temperature switch accuracy detection system can ensure the detection quality of each temperature switch, and in addition, through automatic operation of the temperature switches, the detection efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the technical field of a temperature switch detection device, and more specifically to a temperature switch accuracy detection system. Background Technology

[0002] Bimetallic temperature switches are made based on the principle of thermal expansion and contraction. Thermal expansion and contraction is a common property of all objects. A bimetallic temperature switch uses two alloys with different coefficients of thermal expansion, bonded together on opposite sides. Heat is conducted through the aluminum cap of the switch. When heated, the bimetallic strip converts the temperature change into mechanical movement. When the temperature rises to the set temperature, the center of the bimetallic strip can momentarily flip, and when the temperature drops, it returns to its original position. This characteristic causes the contacts of the temperature switch to open or close, thus achieving the purpose of cutting off or connecting the circuit. Bimetallic temperature switches are widely used in household appliances and industrial equipment such as kettles, refrigerators, water heaters, and boilers to protect equipment from overheating.

[0003] The traditional detection method for bimetallic temperature switches and thermistor temperature sensors uses a temperature control chamber for testing. The bimetallic temperature switch or thermistor temperature sensor is placed in the temperature control chamber for heating and testing. After heating to a certain temperature, the bimetallic temperature switch protection is activated and the temperature at which it is disconnected is recorded. Then, the temperature is lowered until the bimetallic temperature switch returns to its initial state and the temperature at this time is recorded.

[0004] In actual production, due to manufacturing errors or variations in the properties of materials from different batches, some temperature switches may fail to instantly flip the metal strip at the temperature it should reach, resulting in a relatively low product qualification rate. To address this, existing temperature switches incorporate an adjusting bolt to regulate the spacing of the metal strips, altering their deformation for instantaneous flipping. This structure allows temperature switches produced within the same batch to function at their designated temperatures even if they fail to flip instantly at the expected temperature. Tightening the adjusting bolt restores sufficient spacing for instantaneous flipping, ensuring all switches meet the same production standards and overcome the aforementioned defects. However, the current testing method for these temperature switches is relatively traditional, requiring manual inspection. The adjusting bolt must be manually tightened at a consistent speed until the operator hears or feels the metal strip instantly flipping at that temperature. However, this method places relatively high demands on the testing personnel, requiring them to have sufficient testing skills and experience. Moreover, the testing efficiency of this method is relatively low, and the testing accuracy also needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a temperature switch accuracy detection system, thereby ensuring the detection quality of each temperature switch. In addition, the detection efficiency is effectively improved through the automated operation of the temperature switches.

[0006] The technical solution adopted in this invention is: A temperature switch accuracy testing system includes a testing platform. A temperature control groove for testing the temperature switch is located in the center of the top surface of the testing platform. A crossbeam is fixed above the testing platform. A testing fixture for clamping the temperature switch is located on the front side of the top surface of the testing platform. The testing fixture is equipped with a temperature switch detection sensor. A screwdriver for tightening the temperature switch adjustment bolt is movably connected vertically to the front end face of the crossbeam, located directly above the testing fixture. Both ends of the crossbeam are fixedly connected to the testing platform via support columns. The screwdriver is driven to the bottom of a servo motor, which is movably connected to the crossbeam via a lifting device.

[0007] A further improvement of the present invention is that the lifting device includes a lifting piston A fixed to the front end face of the crossbeam, a lifting piston B provided below the lifting piston A, the lifting piston B being fixed to the end of the piston rod A of the lifting piston A, a servo motor provided below the lifting piston B, the servo motor being connected to the end of the piston rod B of the lifting piston B, and the turning blade being driven by the power output shaft of the servo motor through a floating centering transmission device.

[0008] A further improvement of the present invention is that the end of the piston rod A of the lifting piston A is fixed with a sliding frame A, the lifting piston B is fixed to the piston rod A through the sliding frame A, the end of the piston rod B is fixed with a sliding frame B, the servo motor is fixed to the piston rod B through the sliding frame B, and the sliding frame A moves up and down along a vertical track frame fixed to the crossbeam; the sliding frame B and the lifting piston B are also connected by a spring with a preset tension force.

[0009] A further improvement of the present invention is that the vertical stroke of the piston rod A is less than or equal to the distance between the rotating blade at its highest point and the adjusting bolt clamped on top of the temperature switch in the detection fixture; the sum of the vertical strokes of the piston rod A and the piston rod B is greater than the distance between the rotating blade at its highest point and the adjusting bolt clamped on top of the temperature switch in the detection fixture, and less than the sum of the distance between the rotating blade at its highest point and the adjusting bolt clamped on top of the temperature switch in the detection fixture and the stretchable stroke of the spring with a preset tension force.

[0010] A further improvement of the present invention is that a limiting plate for a turning blade is movably connected to the front end face of the crossbeam, located below the servo motor. The top surface of the limiting plate is provided with a limiting hole A that penetrates downward through the limiting plate. The limiting plate is fixed to a limiting frame, and the limiting frame is adjustablely fixed to the lower part of the vertical track frame.

[0011] A further improvement of the present invention is that the detection fixture includes a horizontal support plate positioned directly above the detection sensor to support the bottom of the temperature switch. The left and right ends of the horizontal support plate extend symmetrically to both sides of the detection sensor and are symmetrically provided with side rods perpendicular to the length direction of the horizontal support plate. Both the detection sensor and the side rods are fixed to the detection platform. The extension direction of the side rods is parallel to the line connecting the projections of the detection sensor and the screwdriver in the same horizontal plane. The end of the side rod facing the temperature control slot is connected and fixed via a connecting horizontal plate. Between the side rods on the side of the horizontal support plate facing away from the connecting horizontal plate, a movable clamping block is provided that reciprocates along the extension direction of the side rods. The movable clamping block is fixedly connected to the piston rod C end of the horizontal piston. The horizontal piston is fixed to the side rods. Lateral limiting blocks are symmetrically fixed to the top surfaces of the side rods corresponding to the positions on the horizontal support plate. The detection probe at the top of the detection sensor extends upwards and is fixedly inserted into the corresponding detection through-hole on the horizontal support plate.

[0012] A further improvement of the present invention is that the upper part of the side wall end face of the movable clamping block facing the horizontal support plate, located between the side rods, is provided with symmetrical protruding clamps. The top of the movable clamping block, in the area between the protruding clamps, is provided with a through groove A that penetrates the side wall of the movable clamping block facing the horizontal support plate and the side wall away from the horizontal support plate. The through groove A matches the actuator rod of the temperature switch.

[0013] A further improvement of the present invention is that the side wall of the side rod facing each other is symmetrically provided with limiting grooves that match the protruding structures on both sides of the bottom of the temperature switch at the position corresponding to the position between the horizontal support plate and the connecting horizontal plate; the top of the side rod is symmetrically provided with limiting protrusions that match the bottom of the side wall of the temperature switch facing the connecting horizontal plate at the position corresponding to the position between the limiting groove and the connecting horizontal plate.

[0014] A further improvement of the present invention is that multiple rollers are symmetrically arranged on the sidewalls of the opposing sides of the lateral limiting blocks. The shafts of the rollers are evenly distributed along the sidewalls of the opposing sides of the lateral limiting blocks. The rollers protrude from the sidewalls of the opposing sides of the lateral limiting blocks. The sidewalls of the temperature switches placed on the horizontal support plate are in direct contact with the rollers provided on the corresponding side of the lateral limiting blocks.

[0015] A further improvement of the present invention is that the detection fixture is fixedly connected to the top surface of the detection stage via the connecting base plate B, the detection sensor is fixed to the top surface of the connecting base plate B, and the side rods are respectively fixed to the top surface of the connecting base plate B via support members.

[0016] The beneficial effects of this invention are as follows: First, the temperature switch accuracy detection system of the present invention can ensure the detection quality of each temperature switch. In addition, the detection efficiency is effectively improved through the automated operation of the temperature switches.

[0017] Secondly, the temperature switch accuracy detection system of the present invention connects the lifting piston and the servo motor via a spring. This spring can counteract part of the force exerted by the piston rod B of the lifting piston B when it extends downwards, while maintaining the downward speed of the piston rod B. This ensures that the rotary cutter connected to the servo motor has sufficient downward pressure to tighten the adjusting bolt of the temperature switch, while also preventing excessive downward pressure from damaging the spring connected to the adjusting bolt inside the temperature switch. This also prevents the rotary cutter from slipping between itself and the adjusting bolt during tightening, which would lead to inaccurate temperature switch detection and a lower product qualification rate. Furthermore, by counteracting the force of the lifting piston B via the spring, the air source pressure connected to the lifting piston B can be relatively high. The lifting speed of the piston rod B is positively correlated with the air source pressure of the lifting piston B, ensuring a fast lifting speed of the rotary cutter and guaranteeing the detection speed.

[0018] Third, in the temperature switch accuracy detection system of the present invention, the spring is a helical spring, the turning angle of the adjusting bolt is generally less than 360 degrees, and the axial movement distance of the adjusting bolt in one revolution is the pitch of the adjusting bolt. The change of the axial length of the spring by this axial movement distance is negligible. Therefore, when turning the adjusting bolt, the downward pressure of the turning tool can be kept relatively consistent, which ensures the stability of turning the adjusting bolt.

[0019] Fourth, in the temperature switch accuracy detection system of the present invention, the output shaft of the servo motor is connected to the screwdriver through a floating centering transmission device, so that when the screwdriver is turning the adjusting bolt of the temperature switch, the influence of vibration or shaking generated by the servo motor driving on the screwdriver can be filtered out, ensuring that the screwdriver can always be stable when turning the adjusting bolt of the temperature switch.

[0020] Fifth, the temperature switch accuracy detection system of the present invention further ensures the stability of the screwdriver in the horizontal direction through the limiting hole of the limiting plate, ensuring that the screwdriver can accurately connect with the adjusting bolt of the temperature switch clamped in the detection fixture.

[0021] Sixth, the temperature switch accuracy detection system of the present invention, by detecting the structure of the tooling clamp, can not only clamp and fix the temperature switch, but also facilitate the temperature switch to be detected by the detection sensor while the temperature switch adjustment bolt is being turned.

[0022] Seventh, the temperature switch accuracy detection system of the present invention, through the structure of the detection fixture, first places the temperature switch on the horizontal support plate, and then clamps and fixes the temperature switch by the movable clamping block. Therefore, it has low requirements for the placement of the temperature switch, which facilitates the quick picking and putting of the temperature switch. In addition, it can also improve the applicability of the temperature switch to a certain extent. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the testing system of this application.

[0024] Figure 2 This is a three-dimensional enlarged schematic diagram of the temperature switch adjustment blade of this application.

[0025] Figure 3 This is a top-view enlarged schematic diagram of the testing fixture for the temperature switch of this application.

[0026] Figure 4 The images show a perspective view and a top view of the temperature switch (temperature probe omitted) of this application from the lower right side. Detailed Implementation

[0027] Combination Figures 1-3 As can be seen, the temperature switch accuracy detection system includes a detection platform 1. The top surface of the detection platform 1 is provided with a temperature control groove 2 for detecting the temperature switch. A crossbeam 3 is fixed above the detection platform 1. The front side of the top surface of the detection platform 1 is provided with a detection fixture 7 for clamping the temperature switch. The detection fixture 7 is provided with a detection sensor 23 for the temperature switch. The front end face of the crossbeam 3, located directly above the detection fixture 7, is also movably connected to a screwdriver 4 for tightening the temperature switch adjustment bolt. The two ends of the crossbeam 3 are respectively fixedly connected to the detection platform 1 through support columns 8. The screwdriver 4 is drivenly connected to the bottom of a servo motor 9. The servo motor 9 is movably connected to the crossbeam 3 through a lifting device.

[0028] The lifting device includes a lifting piston A10 fixed to the front end face of the crossbeam 3, a lifting piston B11 below the lifting piston A10, the lifting piston B11 being fixed to the end of the piston rod A of the lifting piston A10, a servo motor 9 below the lifting piston B11, the servo motor 9 being connected to the end of the piston rod B of the lifting piston B11, and the turning blade 4 being connected to the power output shaft of the servo motor 9 via a floating centering transmission device 15.

[0029] The piston rod A of the lifting piston A10 is fixed to the end of a sliding frame A17. The lifting piston B11 is fixed to the piston rod A via the sliding frame A17. The end of the piston rod B is fixed to a sliding frame B18. The servo motor 9 is fixed to the piston rod B via the sliding frame B18. The sliding frame A17 moves up and down along the vertical track frame 14 fixed to the crossbeam 3.

[0030] The sliding frame B18 and the lifting piston B11 are also connected by a spring 19 with a preset tensile force.

[0031] The vertical stroke of piston rod A is less than or equal to the distance between the highest-positioned rotating blade 4 and the adjusting bolt clamped on top of the temperature switch in the detection fixture 7; the sum of the vertical strokes of piston rod A and piston rod B is greater than the distance between the highest-positioned rotating blade 4 and the adjusting bolt clamped on top of the temperature switch in the detection fixture 7, and less than the sum of the distance between the highest-positioned rotating blade 4 and the adjusting bolt clamped on top of the temperature switch in the detection fixture 7 and the stretchable stroke of the spring 19 with a preset tension force.

[0032] The front end face of the crossbeam 3, located below the servo motor 9, is also movably connected to a limiting plate 5 for a screwdriver 4. The top surface of the limiting plate 5 is provided with a limiting hole A that penetrates downward through the limiting plate 5. The limiting plate 5 is fixed to the limiting frame 20, and the limiting frame 20 is adjustablely fixed to the lower part of the vertical track frame 14.

[0033] The lower part of the vertical track frame 14 is fixedly provided with a vertical protrusion 21, and the limiting frame 20 is adjustablely fixed to the vertical protrusion 21.

[0034] The lifting piston A10 is fixed on the connecting base plate A6 provided on the front end face of the crossbeam 3, and the lifting piston A10 is fixedly connected to the connecting base plate A6 through the sliding base plate 16.

[0035] The sliding frame A17 is slidably connected up and down along the lifting slide rail A fixed to the sliding base plate 16.

[0036] The sliding frame B18 is slidably connected up and down along the lifting slide rail B fixed to the lifting piston B11.

[0037] The floating centering transmission device 15 adopts the floating cutter head body structure with spherical bearing structure disclosed in the patent application number 202020377796.3.

[0038] The testing fixture 7 includes a horizontal support plate 24 positioned directly above the sensor 23 to support the bottom of the temperature switch. The left and right ends of the horizontal support plate 24 extend symmetrically to both sides of the sensor 23, and side rods 25 are symmetrically positioned perpendicular to the length of the horizontal support plate 24. Both the sensor 23 and the side rods 25 are fixed to the testing table 1. The extension direction of the side rods 25 is parallel to the line connecting the projections of the sensor 23 and the screwdriver 4 onto the same horizontal plane. The end of the side rod 25 facing the temperature control slot 2 is connected via a... The horizontal plate 26 is connected and fixed. Between the side rods 25 on the side of the horizontal support plate 24 facing away from the horizontal plate 26, there is a movable clamping block 28 that moves back and forth along the extension direction of the side rods 25. The movable clamping block 28 is fixedly connected to the end of the piston rod C32 of the horizontal piston 31. The horizontal piston 31 is fixed to the side rods 25. Lateral limiting blocks 27 are symmetrically fixed on the top surface of the side rods 25 corresponding to the positions on the horizontal support plate 24. The detection probe 29 on the top of the detection sensor 23 extends upward and is fixedly inserted into the corresponding detection through hole 30 of the horizontal support plate 24.

[0039] The movable clamping block 28 has symmetrically protruding clamps on the upper part of the side wall end face facing the horizontal support plate 24, located between the side rods 25. The top of the movable clamping block 28, in the area between the protruding clamps, has a through groove A34 that penetrates the side wall of the movable clamping block 28 facing the horizontal support plate 24 and the side wall of the movable clamping block 28 away from the horizontal support plate 24. The through groove A34 matches the actuator rod of the temperature switch.

[0040] The end of the piston rod C32 is fixedly connected to the movable clamping block 28 via a connecting block 33, and the top of the connecting block 33 is provided with a matching through groove B35 corresponding to the through groove A34.

[0041] The area enclosed by the horizontal support plate 24, the connecting horizontal plate 26, and the side rods 25 on both sides is a receiving cavity 36 for accommodating the bottom protrusion of the temperature switch.

[0042] The side wall of the side rod 25 on the opposite side is provided with a limiting groove 38 that matches the protruding structure on both sides of the bottom of the temperature switch at the position corresponding to the position between the horizontal support plate 24 and the connecting horizontal plate 26.

[0043] The top of the side rod 25 is provided with a symmetrical limiting protrusion 37 that matches the bottom of the side wall of the temperature switch facing the connecting horizontal plate 26, corresponding to the position between the limiting groove 38 and the connecting horizontal plate 26.

[0044] The lateral limiting block 27 has multiple rollers 39 symmetrically arranged on the opposite side wall. The shafts of the rollers 39 are evenly distributed along the opposite side wall of the lateral limiting block 27. The rollers 39 protrude from the opposite side wall of the lateral limiting block 27. The side wall of the temperature switch placed on the horizontal support plate 24 is in contact with the rollers 39 provided on the corresponding side of the lateral limiting block 27.

[0045] The detection fixture 7 is fixedly connected to the top surface of the detection table 1 via the connecting base plate B22, the detection sensor 23 is fixed to the top surface of the connecting base plate B22, and the side rods 25 are respectively fixed to the top surface of the connecting base plate B22 via support members.

[0046] Mounting base plates A are fixed to the two sides of the top surface of the testing table 1, and the bottom end of the support column 8 is fixedly connected to the mounting base plate A.

[0047] The front edge of the top surface of the testing station 1 is fixed with a mounting base plate B13, and the connecting base plate B22 is fixed to the top surface of the mounting base plate B13.

[0048] The mounting base plate A extends to the front edge of the testing stage 1, and both ends of the mounting base plate B13 are fixedly connected to the testing stage 1 through the mounting base plate A.

[0049] A heat insulation ring 12 is provided on the top surface of the testing platform 1 at the slot of the temperature control tank 2.

[0050] In this application, multiple temperature switches to be tested are first evenly distributed on the test platform 1 around the temperature control tank 2, with the axis of the temperature control tank 2 as the center. The temperature probes of each temperature switch are inserted into the temperature control tank 2, which contains liquid. The temperature control tank 2 maintains the liquid temperature at the standard test temperature for testing the temperature switches. After the temperature switches have been placed for a period of time, testing begins on each of the temperature switches.

[0051] During testing, the bottom of the temperature switch closest to the testing fixture 7 is placed on the horizontal support plate 24 and secured between the lateral limiting blocks 27. The end face of the temperature switch connected to the temperature probe faces away from the movable clamping block 28, and the two protruding structures on both sides of the bottom of the temperature switch are limited by the limiting groove 38. Then, the piston rod C32 of the horizontal piston 31 is controlled to drive the movable clamping block 28 to clamp and fix the temperature switch to the limiting protrusion 37. At this time, the testing probe 29 corresponds exactly to the bottom position of the temperature switch. Then, the piston rod A of the lifting piston A10 drives the lifting piston B11 and the rotating blade 4 connected to the servo motor 9 along the vertical direction. The track frame 14 moves downward, and the piston rod B of the lifting piston B11 drives the rotating blade 4, which is connected to the servo motor 9, to move downward. The rotating blade 4 moves downward from the limiting hole A of the limiting plate 5 until its bottom contacts the adjusting bolt fixed to the top surface of the temperature switch on the detection fixture 7. At this point, the rotating blade 4 cannot continue to move downward because it is limited by the temperature switch. However, since the vertical movement of the piston rod A is less than or equal to the distance between the rotating blade 4 at its highest point and the adjusting bolt on the top of the temperature switch clamped in the detection fixture 7, the sum of the vertical movement of the piston rod A and the vertical movement of the piston rod B is less than or equal to the distance between the rotating blade 4 at its highest point and the adjusting bolt fixed to the top surface of the temperature switch on the detection fixture 7. The distance between the rotating blade 4 at its highest point and the adjusting bolt clamped on top of the temperature switch in the detection fixture 7 is greater than the sum of the distance between the rotating blade 4 at its highest point and the adjusting bolt clamped on top of the temperature switch in the detection fixture 7 and the stretchable stroke of the spring 19 with a preset tension force. Therefore, during the downward movement of the piston rod B and the rotating blade 4 relative to the lifting piston B11, they need to overcome the tensile restoring force of the spring 19. So when the rotating blade 4 moves downward to the bottom and contacts the adjusting bolt fixed on the top surface of the temperature switch in the detection fixture 7, the rotating blade 4 connected to the piston rod B at this time... The downward pressure on the adjusting bolt is the difference between the air source force of the lifting piston B11 and the reaction force of the spring 19. This not only ensures that the turning blade 4 has sufficient downward pressure to turn the adjusting bolt, but also prevents the downward pressure of the turning blade 4 on the adjusting bolt from damaging the spring inside the temperature switch. Furthermore, the spring 19 is a helical spring, and the turning angle of the adjusting bolt is generally less than 360 degrees. The axial movement distance of the adjusting bolt in one revolution is the pitch of the adjusting bolt. This axial movement distance has a negligible impact on the change in the axial length of the adjusting spring. Therefore, the downward pressure of the turning blade 4 can be kept relatively consistent when turning the adjusting bolt.When piston rod A moves downward to its maximum stroke, servo motor 9 drives the rotating blade 4 to rotate at high torque and low speed, thereby rotating the adjusting bolt of the temperature switch. Simultaneously, detection sensor 23 detects the temperature switch during the tightening of the adjusting bolt via detection probe 29. When detection sensor 23 detects a signal indicating that the temperature switch meets the detection requirements, servo motor 9 stops rotating. Then, piston rod B of lifting piston B11 drives servo motor 9 upward, and the restoring force of spring 19 further promotes the upward movement of piston rod B relative to lifting piston B11, allowing the rotating blade 4 to separate from the temperature switch as quickly as possible. After the detection is complete, piston rod A of lifting piston A10 drives the rotating blade 4 upward. When piston rod A moves upward to its maximum stroke, piston rod C of horizontal piston 31 drives movable clamp 28 to separate from the temperature switch that has been tested. This provides sufficient space above and in front of the tested temperature switch to facilitate its removal from the testing fixture 7, and also facilitates the placement of another temperature switch to be tested in the testing fixture 7 for further testing.

Claims

1. A temperature switch accuracy detection system, characterized in that: The device includes a testing platform (1), a temperature control groove (2) for detecting temperature switches is provided in the middle of the top surface of the testing platform (1), a crossbeam (3) is fixed above the testing platform (1), a testing fixture (7) for clamping temperature switches is provided on the front side of the top surface of the testing platform (1), the testing fixture (7) is provided with a temperature switch detection sensor (23), a screwdriver (4) for screwing the temperature switch adjustment bolt is also movably connected to the front end face of the crossbeam (3) and located directly above the testing fixture (7), the two ends of the crossbeam (3) are fixedly connected to the testing platform (1) through support columns (8), the screwdriver (4) is driven to the bottom of a servo motor (9), and the servo motor (9) is movably connected to the crossbeam (3) through a lifting device.

2. The temperature switch accuracy detection system as described in claim 1, characterized in that: The lifting device includes a lifting piston A (10) fixed to the front end face of the crossbeam (3), a lifting piston B (11) is provided below the lifting piston A (10), the lifting piston B (11) is fixed to the end of the piston rod A of the lifting piston A (10), a servo motor (9) is provided below the lifting piston B (11), the servo motor (9) is connected to the end of the piston rod B of the lifting piston B (11), and the turning knife (4) is connected to the power output shaft of the servo motor (9) through a floating centering transmission device (15).

3. The temperature switch accuracy detection system as described in claim 2, characterized in that: The piston rod A of the lifting piston A (10) is fixed with a sliding frame A (17). The lifting piston B (11) is fixed to the piston rod A through the sliding frame A (17). The piston rod B is fixed with a sliding frame B (18). The servo motor (9) is fixed to the piston rod B through the sliding frame B (18). The sliding frame A (17) moves up and down along the vertical track frame (14) fixed to the crossbeam (3). The sliding frame B (18) and the lifting piston B (11) are also connected by a spring (19) with a preset tension force.

4. The temperature switch accuracy detection system as described in claim 3, characterized in that: The vertical stroke of piston rod A is less than or equal to the distance between the highest-positioned rotary cutter (4) and the adjusting bolt on the top of the temperature switch clamped in the detection fixture (7); the sum of the vertical stroke of piston rod A and the vertical stroke of piston rod B is greater than the distance between the highest-positioned rotary cutter (4) and the adjusting bolt on the top of the temperature switch clamped in the detection fixture (7), and less than the sum of the distance between the highest-positioned rotary cutter (4) and the adjusting bolt on the top of the temperature switch clamped in the detection fixture (7) and the stretchable stroke of the spring (19) with a preset tension force.

5. The temperature switch accuracy detection system as described in claim 3, characterized in that: The front end face of the crossbeam (3) is connected to a limiting plate (5) for a screwdriver (4) below the servo motor (9). The top surface of the limiting plate (5) is provided with a limiting hole A that penetrates downward through the limiting plate (5). The limiting plate (5) is fixed to the limiting frame (20). The limiting frame (20) is adjustablely fixed to the lower part of the vertical track frame (14).

6. The temperature switch accuracy detection system as described in claim 1, characterized in that: The detection fixture (7) includes a horizontal support plate (24) positioned directly above the detection sensor (23) to support the bottom of the temperature switch. The left and right ends of the horizontal support plate (24) extend symmetrically to both sides of the detection sensor (23) and are symmetrically provided with side rods (25) perpendicular to the length of the horizontal support plate (24). Both the detection sensor (23) and the side rods (25) are fixed to the detection table (1). The extension direction of the side rods (25) is parallel to the projection line connecting the detection sensor (23) and the screwdriver (4) projected onto the same horizontal plane. The end of the side rod (25) facing the temperature control slot (2) is connected to a horizontal plate (…). 26) Connection and fixation: A movable clamping block (28) is provided between the side rods (25) on the side of the horizontal support plate (24) facing away from the connecting horizontal plate (26) and moves back and forth along the extension direction of the side rods (25). The movable clamping block (28) is fixedly connected to the end of the piston rod C (32) of the horizontal piston (31). The horizontal piston (31) is fixed to the side rod (25). Lateral limiting blocks (27) are symmetrically fixed on the top surface of the side rods (25) corresponding to the position of the horizontal support plate (24). The detection probe (29) at the top of the detection sensor (23) extends upward and is fixedly inserted into the corresponding detection through hole (30) of the horizontal support plate (24).

7. The temperature switch accuracy detection system as described in claim 6, characterized in that: The movable clamping block (28) has symmetrically arranged protruding clamps on the upper part of its side wall facing the horizontal support plate (24), located between the side rods (25). The top of the movable clamping block (28), in the area between the protruding clamps, has a through groove A (34) penetrating both the side wall facing the horizontal support plate (24) and the side wall away from the horizontal support plate (24). The through groove A (34) matches the actuator rod of the temperature switch. The end of the piston rod C (32) is fixedly connected to the movable clamping block (28) via a connecting block (33). The top of the connecting block (33) has a matching through groove B (35) corresponding to the through groove A (34).

8. The temperature switch accuracy detection system as described in claim 6, characterized in that: The side wall of the side rod (25) on the opposite side is provided with a limiting groove (38) that matches the protruding structure on both sides of the bottom of the temperature switch at the position between the horizontal support plate (24) and the connecting horizontal plate (26); the top of the side rod (25) is provided with a limiting protrusion (37) that matches the bottom of the side wall of the temperature switch facing the connecting horizontal plate (26) at the position between the limiting groove (38) and the connecting horizontal plate (26).

9. The temperature switch accuracy detection system as described in claim 6, characterized in that: The lateral limiting block (27) has multiple rollers (39) symmetrically arranged on the opposite side wall. The shafts of the rollers (39) are evenly distributed along the opposite side wall of the lateral limiting block (27). The rollers (39) protrude from the opposite side wall of the lateral limiting block (27). The side wall of the temperature switch placed on the horizontal support plate (24) is in contact with the rollers (39) provided on the corresponding side of the lateral limiting block (27).

10. The temperature switch accuracy detection system as described in claim 6, characterized in that: The detection fixture (7) is fixedly connected to the top surface of the detection table (1) via the connecting base plate B (22), the detection sensor (23) is fixed to the top surface of the connecting base plate B (22), and the side rods (25) are fixed to the top surface of the connecting base plate B (22) via the support members.

Images