Screening and conveying equipment for electronic components

Abstract

The present invention discloses a screening and conveying device for electronic components, which belongs to the field of electronic component processing, and includes a driving mechanism, a thermal relay body, a thermal element, a bimetallic strip and a transmission belt. A lifting plate is arranged in the driving mechanism, a fixed sleeve and a conductive slip ring are arranged at one end of the lifting plate, a driven shaft is arranged in the fixed sleeve, a turntable is arranged at the bottom end of the driven shaft, a gripping mechanism is arranged at the bottom of the turntable, and a multi-station table is arranged below the turntable. The present invention can drive the piston to extend and retract by arranging a gripping mechanism, and adsorb the thermal relay body through a suction cup, and at the same time drive the test touch plate and the balance touch plate to synchronously perform arc action, and connect the thermal relay body to the test circuit through the test touch plate. Under the joint action of the driving mechanism, the turntable and the multi-station table, the electrical properties and material properties of the thermal relay body can be tested respectively, and unqualified parts can be put into the corresponding collection bucket.

Description

Technical Field

[0001] The invention relates to the technical field of electronic component processing, and in particular to a screening and conveying device for electronic components. Background Art

[0002] Electronic components include thermal relays. Thermal relays generate heat through the current flowing into the thermal element, causing the bimetallic strips with different expansion coefficients to deform and bend. When the deformation reaches a certain distance, the connecting rod is pushed to disconnect the control circuit, thereby de-energizing the contactor and realizing overload protection for the motor. During the production process, the thermal relays to be assembled need to be tested to screen out defective products and rework the defective products. The reasons why the thermal relays cannot work include poor electrical performance of the thermal element, poor bimetallic strip material and poor connecting rod action;

[0003] The existing thermal relay screening adopts a manual detection method, that is, the tester uses a multimeter to test the terminals of the thermal relay. This detection method can only detect one thermal relay at a time, with low detection efficiency, and can only detect the thermal elements in the thermal relay, but cannot detect poor bimetallic material and poor connecting rod action, resulting in defective parts still existing after the screening is completed. Therefore, a screening and conveying device for electronic components is proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, electronic components screening requires manual inspection one by one, the inspection efficiency is low, and it is impossible to detect poor bimetallic material and poor connecting rod action, resulting in defective parts still existing after screening is completed. A screening and conveying equipment for electronic components is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A screening and conveying device for electronic components, comprising a driving mechanism, a thermal relay body, a thermal element, a bimetallic strip and a transmission belt, wherein a lifting plate is arranged in the driving mechanism, a fixed shaft sleeve is arranged at one end of the lifting plate, a driven rotating shaft is arranged in the fixed shaft sleeve, a conductive slip ring is arranged above the driven rotating shaft, a turntable for switching workstations is arranged at the bottom end of the driven rotating shaft, the center of the bottom of the turntable is fixedly connected to the output end of the conductive slip ring, a plurality of gripping mechanisms are arranged around the center of the bottom of the turntable, and a multi-station platform is arranged below the turntable;

[0007] The driving mechanism comprises a frame, a plurality of slide rails for sliding the lifting plate are arranged on one side of the frame, a lifting motor and a rotating motor are fixedly connected to the bottom of the top of the frame, a screw rod is rotatably connected to the bottom of the frame corresponding to the lifting motor, and is used to drive the lifting plate to lift, a spline shaft is rotatably connected to the bottom of the frame corresponding to the rotating motor, and is used to drive the turntable to rotate, an input end of the screw rod passes through the top of the frame and is connected to the output end of the lifting motor through a transmission belt, and an input end of the spline shaft passes through the top of the frame and is connected to the output end of the rotating motor through a transmission belt;

[0008] The grabbing mechanism comprises a shell, the top of the shell is fixedly connected to the bottom of the turntable, one side of the shell is fixedly connected to a wire harness block, the two sides of the bottom of the shell are rotatably connected to a first gear and a second gear, the bottom of the first gear is fixedly connected to a test touch plate for providing a test current, the bottom of the second gear is fixedly connected to a balance touch plate, the bottom of the shell is fixedly connected to a plurality of resistance blocks, an action component is arranged in the shell, a piston is arranged at the bottom of the action component, and the output end of the piston passes through the bottom end of the shell and is fixedly connected to a suction cup for adsorbing a thermal relay body;

[0009] The surface of the multi-station table is provided with a conveyor belt for test pieces, a conveyor belt for qualified pieces, a temperature test bench for testing the performance of thermal elements, a bending test bench for testing the performance of bimetallic strips, and a plurality of screening slots for screening out defective products, and a collection bucket is provided below the screening slots.

[0010] Preferably, the lifting plate is fixedly connected with a slider at the slide rail, the slider is slidably connected to the slide rail, a threaded hole is opened at the screw rod of the lifting plate, the threaded hole is connected to the screw rod, the lifting plate is rotatably connected with a transmission bearing at the spline shaft corresponding to the lifting plate, a transmission sleeve is installed in the transmission bearing, and the output end of the transmission sleeve is connected to the driven rotating shaft through a transmission belt.

[0011] Preferably, the driven rotating shaft and the rotating disk are both provided with wire passing holes at their centers, so that the wires of the conductive slip ring can reach the output end of the conductive slip ring.

[0012] Preferably, a plurality of protrusions matching the spline shaft are fixedly connected inside the transmission sleeve, so that the transmission sleeve can slide along the spline shaft during rotation.

[0013] Preferably, a plurality of conductive members are fixedly connected to the terminals of the thermal relay body on the inner side of the test touch plate, a test wire is fixedly connected to the output end of the conductive member, and the input end of the test wire passes through the wiring harness block and is connected to the output end of the conductive slip ring.

[0014] Preferably, the action component includes an electric push cylinder fixedly installed inside the shell, the electric push cylinder is located above the piston, the output end of the electric push cylinder is fixedly connected to the electric push cylinder, the output end of the electric push cylinder is fixedly connected to a "U"-shaped push block for driving the test touch plate, the balance touch plate and the piston to move, the two sides of the "U"-shaped push block are fixedly connected with racks, the racks are meshed with the first gear and the second gear, and the bottom of the "U"-shaped push block is fixedly connected to the top of the piston.

[0015] Preferably, a plurality of temperature test slots matching the thermal elements are provided on the surface of the temperature test bench corresponding to the thermal elements, and temperature sensors for measuring the temperature of the thermal elements are fixedly installed in the temperature test slots.

[0016] Preferably, a displacement test groove perpendicular to the bimetallic strip is opened on the surface of the bending test bench, and a plurality of laser sensors are fixedly connected in the displacement test groove. The position of the laser sensor corresponds to the position of the bimetallic strip after bending, and is used to detect whether the bimetallic strip is bent in place.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention sets a grasping mechanism, and the electric push cylinder pulls and pushes the "U"-shaped push block, which can drive the piston to extend and retract through the suction cup to absorb the thermal relay body, and at the same time drive the test touch plate and the balance touch plate to perform arc movements synchronously and connect the thermal relay body to the test circuit through the test touch plate, thereby realizing the function of automatically grasping the thermal relay body.

[0019] 2. Under the joint action of the driving mechanism, the turntable and the multi-station table, the present invention can test the electrical properties and material properties of the thermal relay body respectively. Qualified parts are output through the qualified parts conveyor belt, and unqualified parts are moved to the corresponding screening slots through the turntable, realizing the function of automatically detecting multiple defective types and screening according to the defective types, which is convenient for rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a screening and conveying device for electronic components proposed by the present invention;

[0021] Figure 2 This is a structural assembly diagram of a driving mechanism in a screening and conveying device for electronic components proposed by the present invention;

[0022] Figure 3 This is a structural assembly diagram of a lifting plate, a rotating disk and a grabbing mechanism in a screening and conveying device for electronic components proposed by the present invention;

[0023] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic structural diagram of the bottom of a turntable and a gripping mechanism in a screening and conveying device for electronic components proposed by the present invention;

[0025] Figure 6 It is a structural cross-sectional view of a grabbing mechanism in a grabbing state in a screening and conveying device for electronic components proposed by the present invention;

[0026] Figure 7 A structural cross-sectional view of a gripping mechanism in a screening and conveying device for electronic components proposed by the present invention in a released state;

[0027] Figure 8 This is a structural assembly diagram of a motion component in a screening and conveying device for electronic components proposed by the present invention;

[0028] Fig. 9 This is a schematic structural diagram of a multi-station table in a screening and conveying device for electronic components proposed by the present invention;

[0029] Fig.10 for Fig. 9 The enlarged view of point B in the middle;

[0030] Fig.11 A cross-sectional view of a bending test bench in a screening and conveying device for electronic components proposed by the present invention;

[0031] Fig.12 The present invention is a schematic structural diagram of a thermal relay body in a screening and conveying device for electronic components.

[0032] In the figure: 1, thermal relay body; 101, thermal element; 102, bimetallic strip; 2, transmission belt; 3, lifting plate; 4, fixed sleeve; 5, driven shaft; 6, conductive slip ring; 7, turntable; 8, multi-station table; 9, frame; 10, slide rail; 11, lifting motor; 12, rotating motor; 13, lead screw; 14, spline shaft; 15, housing; 16, harness block; 17, first gear; 18, second gear; 19, test touch plate; 20, balance touch plate; 21, resistance block; 22, Piston; 23. Suction cup; 24. Conveyor belt for tested parts; 25. Conveyor belt for qualified parts; 26. Temperature test bench; 27. Bending test bench; 28. Screening trough; 29. ​​Collecting bucket; 30. Slider; 31. Threaded hole; 32. Transmission bearing; 33. Transmission bushing; 34. Bump; 35. Conductive part; 36. Test wire; 37. Electric push cylinder; 38. "U"-shaped push block; 39. Rack; 40. Temperature test trough; 41. Temperature sensor; 42. Displacement test trough; 43. Laser sensor. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example, see Figures 1 to 12 , a screening and conveying device for electronic components, comprising a driving mechanism, a thermal relay body 1, a thermal element 101, a bimetallic strip 102 and a transmission belt 2, a lifting plate 3 is arranged in the driving mechanism, a fixed shaft sleeve 4 is arranged at one end of the lifting plate 3, a driven shaft 5 is arranged in the fixed shaft sleeve 4, a conductive slip ring 6 is arranged above the driven shaft 5, a turntable 7 for switching workstations is arranged at the bottom end of the driven shaft 5, the center of the bottom of the turntable 7 is fixedly connected to the output end of the conductive slip ring 6, a plurality of gripping mechanisms are arranged around the center of the bottom of the turntable 7, and a multi-station platform 8 is arranged below the turntable 7;

[0037] The driving mechanism includes a frame 9, one side of the frame 9 is provided with a plurality of slide rails 10 for sliding the lifting plate 3, the bottom of the top of the frame 9 is fixedly connected with a lifting motor 11 and a rotating motor 12, the bottom of the frame 9 is rotatably connected with a screw rod 13 corresponding to the lifting motor 11, which is used to drive the lifting plate 3 to lift, the bottom of the frame 9 is rotatably connected with a spline shaft 14 corresponding to the rotating motor 12, which is used to drive the turntable 7 to rotate, the input end of the screw rod 13 passes through the top of the frame 9 and is connected to the output end of the lifting motor 11 through a transmission belt 2, and the input end of the spline shaft 14 passes through the top of the frame 9 and is connected to the output end of the rotating motor 12 through a transmission belt 2;

[0038] The grabbing mechanism includes a shell 15, the top of the shell 15 is fixedly connected to the bottom of the turntable 7, a wire harness block 16 is fixedly connected to one side of the shell 15, a first gear 17 and a second gear 18 are rotatably connected to both sides of the bottom of the shell 15, a test touch plate 19 for providing a test current is fixedly connected to the bottom of the first gear 17, and a balancing touch plate 20 is fixedly connected to the bottom of the second gear 18. When the thermal relay body 1 is touched, a balancing force is applied to the thermal relay body 1 through the balancing touch plate 20 to prevent the thermal relay from being displaced due to the impact of the test touch plate 19. A plurality of resistance blocks 21 are fixedly connected to the bottom of the shell 15, and the resistance blocks 21 resist the thermal relay body 1 to prevent its displacement. An action component is arranged in the shell 15, and a piston 22 is arranged at the bottom of the action component. The output end of the piston 22 passes through the bottom end of the shell 15 and is fixedly connected to a suction cup 23 for adsorbing the thermal relay body 1.

[0039] The surface of the multi-station table 8 is provided with a conveyor belt 24 for testing pieces, a conveyor belt 25 for qualified pieces, a temperature test table 26 for testing the performance of the thermal element 101, a bending test table 27 for testing the performance of the bimetallic strip 102, and a plurality of screening slots 28 for screening out defective pieces, and a collection bucket 29 for collecting corresponding defective pieces is provided below the screening slots 28;

[0040] The thermal relay body 1 , the thermal element 101 , the bimetallic strip 102 and the transmission belt 2 are all existing technologies and will not be described in detail here.

[0041] It should be noted that the location of the screening slot 28 is as follows: Fig. 9 As shown, according to the rotation direction of the turntable 7, it is used to screen out parts with poor electrical properties, parts with poor material properties and parts with poor mechanical properties in turn.

[0042] Further, the lifting plate 3 is fixedly connected with a slider 30 at the position corresponding to the slide rail 10, and the slider 30 is slidably connected to the slide rail 10. A threaded hole 31 is opened at the position corresponding to the screw rod 13 of the lifting plate 3, and the threaded hole 31 is connected to the screw rod 13. A transmission bearing 32 is rotatably connected to the position corresponding to the spline shaft 14 of the lifting plate 3. A transmission sleeve 33 is installed in the transmission bearing 32. The output end of the transmission sleeve 33 is connected to the driven rotating shaft 5 through the transmission belt 2. A plurality of protrusions 34 matching the spline shaft 14 are fixedly connected in the transmission sleeve 33, so that the transmission sleeve 33 can slide along the spline shaft 14 during the rotation process, so that the lifting plate 3 can drive the transmission bearing 32, the transmission sleeve 33, the fixed sleeve 4 and the driven rotating shaft 5 to rise and fall synchronously when lifting and falling.

[0043] It should be noted that when the screw rod 13 rotates counterclockwise, the lifting plate 3 slides up along the slide rail 10 under the action of the threaded hole 31. Similarly, when the screw rod 13 rotates clockwise, the lifting plate 3 slides down along the slide rail 10. At the same time, the transmission sleeve 33 is driven to rotate in the transmission bearing 32 through the spline shaft 14, and the driven shaft 5 is driven to rotate through the transmission sleeve 33.

[0044] Furthermore, wire holes are provided at the centers of the driven rotating shaft 5 and the rotating disk 7, so that the wires of the conductive slip ring 6 can reach the output end of the conductive slip ring 6, and the conductive slip ring 6 supports the operation of each grabbing mechanism.

[0045] Furthermore, a plurality of conductive members 35 are fixedly connected to the terminals of the thermal relay body 1 corresponding to the inner side of the test touch plate 19, and a test wire 36 for transmitting a test current is fixedly connected to the output end of the conductive member 35, and the input end of the test wire 36 passes through the wiring harness block 16 and is connected to the output end of the conductive slip ring 6.

[0046] Furthermore, the action component includes an electric push cylinder 37 fixedly installed inside the shell 15, the electric push cylinder 37 is located above the piston 22, and the output end of the electric push cylinder 37 is fixedly connected to a "U"-shaped push block 38 for driving the test touch plate 19, the balance touch plate 20 and the piston 22 to move. The two sides of the "U"-shaped push block 38 are fixedly connected with racks 39, and the racks 39 are meshed with the first gear 17 and the second gear 18. The bottom of the "U"-shaped push block 38 is fixedly connected to the top of the piston 22.

[0047] The advantage of adopting the above structure is that when the electric push cylinder 37 pulls and pushes the "U"-shaped push block 38, the piston 22 is driven to extend and retract through the bottom of the "U"-shaped push block 38, and at the same time, the first gear 17 and the second gear 18 can be driven to rotate through the racks 39 on both sides of the "U"-shaped push block 38, and the test touch plate 19 and the balance touch plate 20 are driven to perform circular arc movements synchronously through the first gear 17 and the second gear 18.

[0048] Furthermore, a plurality of temperature test slots 40 matching the thermal element 101 are provided on the surface of the temperature test bench 26 corresponding to the thermal element 101, and a temperature sensor 41 for measuring the temperature of the thermal element 101 is fixedly installed in the temperature test slot 40. Through the combined action of the temperature test slot 40 and the partition in the thermal relay, the temperatures of the thermal elements 101 are prevented from interfering with each other and causing incorrect test data.

[0049] Furthermore, a displacement test groove 42 perpendicular to the bimetallic strip 102 is opened on the surface of the bending test bench 27, and a plurality of laser sensors 43 are fixedly connected in the displacement test groove 42. The position of the laser sensor 43 corresponds to the position of the bimetallic strip 102 after bending, and is used to detect whether the bimetallic strip 102 is bent in place.

[0050] When the present invention is used, the thermal relay to be tested is placed in a manner as shown in the figure by a feeding mechanism in the prior art. Figure 1 The test piece conveyor belt 24 is used to transport the test piece to the surface of the test piece conveyor belt 24 in the state shown, so that the terminal of the thermal relay body 1 to be tested can be aligned with the test contact plate 19 after reaching the working area of ​​the turntable 7. After the test piece conveyor belt 24 transports the thermal relay body 1 to the working area of ​​the turntable 7 through intermittent action, the lifting motor 11 drives the screw rod 13 to rotate clockwise, and the lifting plate 3 is driven to slide and descend along the slide rail 10 through the screw rod 13, and the turntable 7 and the grabbing mechanism are driven to descend through the lifting plate 3 until the resistance block 21 in the grabbing mechanism contacts the thermal relay body 1 to the working area of ​​the turntable 7. The relay body 1, then the electric push cylinder 37 pulls the "U"-shaped push block 38 to rise, and the bottom of the "U"-shaped push block 38 drives the piston 22 to rise, so that the suction cup 23 forms a negative pressure to adsorb the thermal relay body 1, and at the same time, the racks 39 on both sides of the "U"-shaped push block 38 drive the first gear 17 and the second gear 18 to rotate, and the first gear 17 and the second gear 18 drive the test touch plate 19 and the balance touch plate 20 to synchronously perform an arc action so that the test touch plate 19 and the balance touch plate 20 touch the thermal relay body 1 at the same time, completing the grabbing;

[0051] After the grabbing is completed, the test current is transmitted to the thermal relay body 1 through the test wire 36 and the test touch plate 19 to make the thermal element 101 start to heat up, the lifting motor 11 drives the screw rod 13 to rotate counterclockwise to drive the lifting plate 3 to rise, and the rotating motor 12 drives the spline shaft 14 to rotate counterclockwise, and the transmission sleeve 33 is driven to rotate in the transmission bearing 32 through the spline shaft 14, and the driven shaft 5 is driven to rotate in the fixed sleeve 4 through the transmission sleeve 33, and the turntable 7 is driven to rotate 45° counterclockwise through the driven shaft 5, so that the thermal relay body 1 enters the idle position for heating, and at the same time, the next thermal relay body 1 to be tested is grabbed, and an action is completed;

[0052] When performing the second action, the turntable 7 carries the thermal relay body 1 into the qualified parts output station, and the thermal element 101 completes heating. If the thermal relay body 1 is qualified, a circuit-breaking action will be performed to cut off the test circuit. After the industrial computer in the prior art detects that the test circuit is broken, the driving mechanism drives the lifting plate 3 to drive the turntable 7 to descend until the bottom of the thermal relay body 1 contacts the surface of the qualified parts conveyor belt 25, and then the electric push cylinder 37 pushes the "U"-shaped push block 38 to descend, and the "U"-shaped push block 38 drives the piston 22, the test touch plate 19 and the balance touch plate 20 to reset, and the grasping mechanism releases the grasping of the thermal relay body 1, and the qualified parts conveyor belt 25 conveys the thermal relay body 1 to the next process. If the test circuit is not broken, it indicates that the thermal relay body 1 is unqualified, and the grasping mechanism does not act at this time;

[0053] When performing the third action, the turntable 7 carries the unqualified thermal relay body 1 to the top of the temperature test bench 26. After the lifting plate 3 drives the turntable 7 to descend, the unqualified thermal relay body 1 is closely attached to the surface of the temperature test bench 26, so that the interlayer between the thermal relay bodies 1 is closed, thereby avoiding the heat interference between the thermal elements 101. The temperature of each thermal element 101 is measured by the temperature sensor 41. If any temperature sensor 41 is too low, it indicates that the electrical performance of the thermal relay body 1 is poor.

[0054] During the fourth action, the turntable 7 carries the unqualified thermal relay body 1 to the top of the screening slot 28 for screening out the parts with poor electrical performance. If the electrical performance of the thermal relay body 1 is poor, the grabbing mechanism releases the grabbing after the turntable 7 descends, so that the thermal relay body 1 falls into the collection bucket 29 for collecting the parts with poor electrical performance.

[0055] When performing the fifth action, the turntable 7 carries the unqualified thermal relay body 1 to the top of the curvature test bench 27. After the lifting plate 3 drives the turntable 7 to descend, the unqualified thermal relay body 1 is close to the surface of the curvature test bench 27. At this time, the laser sensor 43 is used to detect the presence of an object. If any laser sensor 43 does not detect an object, it indicates that the bimetallic strip 102 in the thermal relay body 1 has poor material properties. If the inspection is still qualified, it indicates that the mechanical properties of the thermal relay body 1 are poor.

[0056] During the sixth action, the turntable 7 carries the unqualified thermal relay body 1 to the top of the screening slot 28 for screening out the parts with poor material performance. If the material performance of the thermal relay body 1 is poor, the gripping mechanism releases the gripping after the turntable 7 descends, so that the thermal relay body 1 falls into the collection bucket 29 for collecting the parts with poor material performance.

[0057] During the seventh action, the turntable 7 carries the unqualified thermal relay body 1 to the top of the screening slot 28 for screening out parts with poor mechanical properties. The grabbing mechanism releases the grabbing after the turntable 7 descends, so that the thermal relay body 1 falls into the collection bucket 29 for collecting parts with poor mechanical properties.

[0058] After completing the seventh action, a screening process is completed, realizing the function of automatically detecting and screening defective types, thereby improving work efficiency.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A screening and conveying device for electronic components, comprising a driving mechanism, a thermal relay body (1), a thermal element (101), a bimetallic strip (102) and a transmission belt (2), characterized in that: A lifting plate (3) is arranged in the driving mechanism, a fixed shaft sleeve (4) is arranged at one end of the lifting plate (3), a driven shaft (5) is arranged in the fixed shaft sleeve (4), a conductive slip ring (6) is arranged above the driven shaft (5), a turntable (7) for switching workstations is arranged at the bottom end of the driven shaft (5), the center of the bottom of the turntable (7) is fixedly connected to the output end of the conductive slip ring (6), a plurality of gripping mechanisms are arranged around the center of the bottom of the turntable (7), and a multi-station platform (8) is arranged below the turntable (7); The driving mechanism comprises a frame (9), a plurality of slide rails (10) for sliding the lifting plate (3) are arranged on one side of the frame (9), a lifting motor (11) and a rotating motor (12) are arranged at the bottom of the top of the frame (9), a screw rod (13) is rotatably connected to the lifting motor (11) at the bottom of the frame (9) corresponding to the lifting motor (11), and is used to drive the lifting plate (3) to lift and lower, a spline shaft (14) is rotatably connected to the bottom of the frame (9) corresponding to the rotating motor (12), and is used to drive the turntable (7) to rotate, an input end of the screw rod (13) passes through the top of the frame (9) and is connected to the output end of the lifting motor (11) via a transmission belt (2), and an input end of the spline shaft (14) passes through the top of the frame (9) and is connected to the output end of the rotating motor (12) via a transmission belt (2); The gripping mechanism comprises a shell (15), the top of the shell (15) is fixedly connected to the bottom of the rotating disk (7), one side of the shell (15) is fixedly connected to a wiring harness block (16), the two sides of the bottom of the shell (15) are rotatably connected to a first gear (17) and a second gear (18), the bottom of the first gear (17) is fixedly connected to a test touch plate (19) for conducting a test current, the bottom of the second gear (18) is fixedly connected to a balance touch plate (20), the bottom of the shell (15) is fixedly connected to a plurality of abutment blocks (21), an action component is arranged in the shell (15), the bottom of the action component is arranged to have a piston (22), the output end of the piston (22) passes through the bottom of the shell (15) and is fixedly connected to a suction cup (23) for adsorbing the thermal relay body (1); The surface of the multi-station table (8) is provided with a conveyor belt (24) for test pieces, a conveyor belt (25) for qualified pieces, a temperature test table (26) for testing the performance of the thermal element (101), a bending test table (27) for testing the performance of the bimetallic strip (102), and a plurality of screening slots (28) for screening out defective products, and a collection bucket (29) is provided below the screening slots (28).

2. The electronic component screening and conveying device according to claim 1, characterized in that: A slider (30) is fixedly connected to the slide rail (10) at the lifting plate (3), and the slider (30) is slidably connected to the slide rail (10). A threaded hole (31) is provided at the lifting plate (3) at the corresponding screw rod (13), and the threaded hole (31) is connected to the screw rod (13). A transmission bearing (32) is rotatably connected to the spline shaft (14) at the lifting plate (3), and a transmission shaft sleeve (33) is installed in the transmission bearing (32). The output end of the transmission shaft sleeve (33) is connected to the driven rotating shaft (5) through a transmission belt (2).

3. The electronic component screening and conveying device according to claim 2, characterized in that: A plurality of protrusions (34) matching the spline shaft (14) are fixedly connected inside the transmission shaft sleeve (33), so that the transmission shaft sleeve (33) can slide along the spline shaft (14) during the rotation process.

4. The electronic component screening and conveying device according to claim 1, characterized in that: The driven rotating shaft (5) and the rotating disk (7) are both provided with wire holes at their centers, so that the wire of the conductive slip ring (6) can reach the output end of the conductive slip ring (6).

5. The electronic component screening and conveying device according to claim 1, characterized in that: A plurality of conductive members (35) are fixedly connected to the terminals of the thermal relay body (1) on the inner side of the test touch plate (19); a test lead (36) is fixedly connected to the output end of the conductive member (35); and an input end of the test lead (36) passes through the harness block (16) and is connected to the output end of the conductive slip ring (6).

6. The electronic component screening and conveying device according to claim 1, characterized in that: The action component comprises an electric push cylinder (37) fixedly mounted inside the housing (15), the electric push cylinder (37) being located above the piston (22), the output end of the electric push cylinder (37) being fixedly connected to a "U"-shaped push block (38) for driving the test touch plate (19), the balance touch plate (20) and the piston (22) to move, the two sides of the "U"-shaped push block (38) being fixedly connected to racks (39), the racks (39) being meshed with the first gear (17) and the second gear (18), and the bottom of the "U"-shaped push block (38) being fixedly connected to the top of the piston (22).

7. The electronic component screening and conveying device according to claim 1, characterized in that: A plurality of temperature test slots (40) matching the thermal element (101) are provided on the surface of the temperature test bench (26) corresponding to the thermal element (101), and temperature sensors (41) for measuring the temperature of the thermal element (101) are fixedly installed in the temperature test slots (40).

8. The electronic component screening and conveying device according to claim 1, characterized in that: A displacement test groove (42) perpendicular to the bimetallic strip (102) is provided on the surface of the bending test bench (27), and a plurality of laser sensors (43) are fixedly connected in the displacement test groove (42). The positions of the laser sensors (43) correspond to the positions of the bimetallic strip (102) after bending, and are used to detect whether the bimetallic strip (102) is bent in place.

Images