Proximity switch clamping device and test system

Abstract

The utility model provides a proximity switch clamping device and a test system, and the device comprises a cover plate which covers a rear seat and a clamping module, the side surface of a sliding block is provided with ratchets, a first spring is located in a containing hole, the first end of the first spring is connected with the sliding block, and the second end of the first spring abuts against the first end of a pressing rod. The second end of the pressing rod is used for pressing the proximity switch. When the clamping module clamps the proximity switch, the end of the stop rod abuts against the ratchet under the resultant force of the pressure of the sliding block and the elastic force of the second spring, and the second end of the pressing rod abuts against the proximity switch under the elastic force of the first spring. The stop rod rotates around the first rotating shaft in the direction close to the second spring, the end of the stop rod is separated from the ratchet, and the sliding block slides in the direction away from the proximity switch so that the proximity switch can be replaced. Thus, when the sliding block is stabilized at the current position to clamp the proximity switch, the pressing rod can further press the proximity switches of different sizes through elastic deformation of the first spring, and the proximity switches are prevented from loosening.

Description

A proximity switch clamping device and testing system Technical Field

[0001] This application relates to the field of proximity switch testing, specifically to a proximity switch clamping device and testing system. Background Technology

[0002] A proximity switch, also known as a non-contact proximity switch, is an ideal electronic switching sensor. When the detection plate is within the sensing area of ​​the proximity switch, the switch can quickly issue an electrical command without contact, pressure, or sparks.

[0003] Before use, proximity switches usually need to undergo temperature testing. The clamping device in the test chamber holds the proximity switch and continuously adjusts the temperature inside the test chamber. The sensing distance of the proximity switch at different temperatures can be determined by the output state of the proximity switch.

[0004] However, in the prior art, the proximity switch is easily released after the clamping device clamps it, and the clamping device is difficult to adapt to proximity switches of different sizes. Summary of the Invention

[0005] In view of the above problems, this application provides a proximity switch clamping device and a testing system, which overcomes or at least partially solves the problems that the proximity switch is easy to loosen after being clamped by the clamping device, and that the clamping device is difficult to adapt to proximity switches of different shapes and sizes.

[0006] A first aspect of this application provides a proximity switch clamping device, including: multiple clamping modules, a rear seat, and a cover plate. The cover plate covers the rear seat and the clamping modules. Each clamping module includes a sliding block, a first spring, a pressure rod, a second spring, a stop rod, and a first rotating shaft. The rear seat has a mounting hole, a second groove, and a sliding groove, which communicate with each other. The mounting hole is used to place a proximity switch, the second groove is used to place the stop rod and the first rotating shaft, and the sliding groove is used to slide with the sliding block.

[0007] The sliding block has a receiving hole at one end facing the mounting hole, and ratchet teeth on the side of the sliding block. The first spring is located in the receiving hole, the first end of the first spring is connected to the sliding block, and the second end of the first spring abuts against the first end of the pressure rod. The second end of the pressure rod is used to press the proximity switch.

[0008] The stop rod rotates around the first pivot, the first end of the second spring is connected to the groove wall of the second groove, and the second end of the second spring is connected to the side of the stop rod.

[0009] When the clamping module clamps the proximity switch, the end of the stop rod abuts against the ratchet under the combined force of the sliding block pressure and the elastic force of the second spring, and the second end of the pressure rod abuts against the proximity switch under the elastic force of the first spring.

[0010] The stop lever rotates around the first pivot in a direction close to the second spring, the end of the stop lever separates from the ratchet, and the sliding block slides away from the proximity switch to replace the proximity switch.

[0011] In this embodiment, by providing a ratchet and a stop bar, when the sliding block slides towards the proximity switch under external force, the stop bar does not affect the sliding of the sliding block. After the external force is removed, when the clamping module clamps the proximity switch, the end of the stop bar abuts against the ratchet under the combined force of the sliding block's pressure and the second spring's elasticity. Under the action of the stop bar, the sliding block can be stabilized in its current position to clamp the proximity switch. Moreover, the second end of the pressure rod abuts against the proximity switch under the elasticity of the first spring. Thus, when the sliding block is stably clamping the proximity switch in its current position, the pressure rod can further press the proximity switch through the elastic deformation of the first spring, preventing the proximity switch from loosening.

[0012] Under the action of external force, the stop rod rotates around the first pivot in the direction close to the second spring. The end of the stop rod separates from the ratchet. The sliding block slides away from the proximity switch to replace the proximity switch. After replacing the proximity switch, the above steps can be repeated to clamp the replaced proximity switch. In this way, it can accommodate proximity switches of different sizes.

[0013] In one alternative embodiment, the proximity switch clamping device further includes a limiting rod, and the sliding block is provided with a limiting hole, through which the limiting rod passes and connects to the pressure rod.

[0014] In this embodiment, the limiting hole can limit the movement range of the limiting rod, and thus limit the movement range of the pressure rod connected to the limiting rod. In this way, the pressure rod can be prevented from falling out of the receiving hole of the sliding block.

[0015] In one alternative embodiment, one end of the limiting rod is threaded, and the side of the pressure rod facing the limiting hole is threaded. The threaded end of the limiting rod passes through the limiting hole and is accommodated in the threaded hole, so that the limiting rod and the pressure rod are threadedly connected.

[0016] In one alternative embodiment, the proximity switch clamping device further includes a second rotating shaft, a cam, and a first handle. A first end of the second rotating shaft is connected to the first handle, and a second end of the second rotating shaft is connected to the cam. Rotating the first handle causes the cam to rotate from a first position to a second position, thereby pushing the stop rod to rotate around the first rotating shaft in a direction close to the second spring.

[0017] In one alternative embodiment, the proximity switch clamping device further includes a buffer pad, and the second end of the pressure rod is provided with a blind hole, in which the buffer pad is provided, and the second end of the pressure rod abuts against the proximity switch through the buffer pad.

[0018] In this embodiment, by setting a buffer pad, the second end of the pressure rod can be prevented from directly contacting the proximity switch and damaging the proximity switch.

[0019] In one alternative embodiment, the proximity switch clamping device further includes a second handle disposed on the sliding block, the second handle being used to push the sliding block to slide in a direction away from / near the proximity switch.

[0020] In one alternative embodiment, the proximity switch clamping device further includes a third handle disposed on a stop bar, the third handle being used to push the stop bar to rotate about a first pivot in a direction close to the second spring.

[0021] In one alternative configuration, the bottom of the mounting hole is V-shaped.

[0022] Therefore, when the proximity switch is circular, it is less likely to wobble inside the mounting hole.

[0023] A second aspect of this application provides a proximity switch testing system, comprising a test chamber, a position feedback circuit, an input detection circuit, a temperature detection circuit, and a motor control circuit. The test chamber includes a motor, a detection plate, a sliding module, and a proximity switch clamping device provided in the first aspect of this application. The motor drives the detection plate to move closer to / away from the proximity switch clamping device along the sliding module. The position feedback circuit is also connected to the motor and is used to determine the distance between the detection plate and the proximity switch clamping device. The input detection circuit is connected to the output of the proximity switch. The temperature detection circuit is used to detect the temperature inside the test chamber, and the motor control circuit is used to control the operating state of the motor.

[0024] The proximity switch testing system provided in this application embodiment can stably clamp proximity switches of different shapes and sizes and determine their sensing distance at different temperatures.

[0025] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 is a structural schematic diagram of the clamping module and the rear seat provided in some embodiments of this application.

[0028] Figure 2 is an exploded view of a proximity switch clamping device provided in some embodiments of this application.

[0029] Figure 3 is a schematic diagram of the clamping module provided in some embodiments of this application.

[0030] Figure 4 is a cross-sectional view of Figure 3.

[0031] Figure 5 is a schematic diagram of the structure of the clamping module provided in some embodiments of this application when the stop bar and the ratchet are separated.

[0032] Figure 6 is a schematic diagram of the structure of the clamping module provided in some embodiments of this application when the stop bar abuts against the ratchet.

[0033] Figure 7 is a structural schematic diagram of the stop rod provided in some embodiments of this application when the end is square.

[0034] Figure 8 is a front view of a proximity switch clamping device provided in some embodiments of this application.

[0035] Figure 9 is a partial structural schematic diagram of a proximity switch testing system provided in some embodiments of this application.

[0036] Figure 10 is a schematic diagram of another part of the structure of the proximity switch testing system provided in some embodiments of this application. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0039] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0040] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0042] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0043] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] This application provides a proximity switch clamping device, including: multiple clamping modules, a rear seat 01, and a cover plate 02. Figure 1 is a schematic diagram of the structure of the clamping modules and the rear seat provided in some embodiments of this application.

[0045] Figure 2 is an exploded view of a proximity switch clamping device provided in some embodiments of this application. Figure 3 is a structural schematic diagram of a clamping module provided in some embodiments of this application. Figure 4 is a cross-sectional view of Figure 3. Figure 5 is a structural schematic diagram of the clamping module provided in some embodiments of this application when the stop rod is separated from the ratchet. Figure 6 is a structural schematic diagram of the clamping module provided in some embodiments of this application when the stop rod is engaged with the ratchet. Figure 1 shows a schematic diagram of eight clamping modules. Referring to Figures 1-4, the cover plate 02 covers the rear seat 01 and the clamping module. The clamping module includes a sliding block 03, a first spring 04, a pressure rod 05, a second spring 06, a stop rod 07, and a first rotating shaft 08. The rear seat 01 is provided with a mounting hole 011, a second groove 012 and a sliding groove 013. The mounting hole 011, the second groove 012 and the sliding groove 013 are connected. The mounting hole 011 is a through hole and is used to place the proximity switch 09. The second groove 012 is used to place the stop rod 07 and the first rotating shaft 08. The sliding groove 013 is used to cooperate with the sliding block 03 to slide.

[0046] The sliding block 03 has a receiving hole at one end facing the mounting hole 011, and a ratchet 031 is provided on the side of the sliding block 03. The first spring 04 is located in the receiving hole. The first end of the first spring 04 is connected to the sliding block 03, and the second end of the first spring 04 abuts against the first end of the pressure rod 05. The second end of the pressure rod 05 is used to press the proximity switch 09.

[0047] The stop rod 07 rotates around the first rotating shaft 08, which can be fixed in the second groove 012. The first end of the second spring 06 is connected to the groove wall 10 of the second groove 012, and the second end of the second spring 06 is connected to the side of the stop rod 07.

[0048] Referring to Figure 6, when the clamping module clamps the proximity switch 09, the end of the stop rod 07 abuts against the ratchet 031 under the combined force of the pressure of the sliding block 03 and the elastic force of the second spring 06, and the second end of the pressure rod 05 abuts against the proximity switch 09 under the elastic force of the first spring 04.

[0049] In practical applications, Figure 7 is a structural schematic diagram of the stop rod with a square end provided in some embodiments of this application. As shown in Figures 6 and 7, the end of the stop rod 07 can be square, or the end of the stop rod 07 can be stepped. The stepped end of the stop rod 07 can engage with the ratchet 031, allowing the sliding block 03 to be better stabilized in its current position to clamp the proximity switch 09. The stop rod 07 and the first rotating shaft 08 can also be integrally formed.

[0050] Referring to Figure 5, the stop rod 07 rotates around the first pivot 08 in a direction close to the second spring 06. The second spring 06 is compressed by the stop rod 07. The end of the stop rod 07 separates from the ratchet 031. The sliding block 03 is released from the restriction of the stop rod 07 and slides away from the proximity switch 09 to replace the proximity switch 09.

[0051] In this embodiment, by setting ratchet 031 and stop rod 07, when the sliding block 03 slides in the direction close to the proximity switch 09 under the action of external force, the stop rod 07 will not affect the sliding of the sliding block 03. After the external force is removed, when the clamping module clamps the proximity switch 09, the end of the stop rod 07 abuts against the ratchet 031 under the combined force of the pressure of the sliding block 03 and the elastic force of the second spring 06. Under the action of the stop rod 07, the sliding block 03 can be stabilized in the current position to clamp the proximity switch 09. Moreover, the second end of the pressure rod 05 abuts against the proximity switch 09 under the elastic force of the first spring 04. Thus, when the sliding block 03 is stabilized in the current position to clamp the proximity switch 09, the pressure rod 05 can further press the proximity switch 09 through the elastic deformation of the first spring 04 to prevent the proximity switch 09 from loosening.

[0052] Under the action of external force, the stop rod 07 rotates around the first rotating shaft 08 in the direction close to the second spring 06. The end of the stop rod 07 separates from the ratchet 031. The sliding block 03 slides in the direction away from the proximity switch 09 to replace the proximity switch 09. After replacing the proximity switch 09, the aforementioned steps can be repeated, that is, the sliding block 03 slides in the direction close to the replaced proximity switch 09 under the action of external force until the second end of the pressure rod 05 contacts the replaced proximity switch 09 to clamp the replaced proximity switch 09. The pressure rod 05 further presses the replaced proximity switch 09 through the elastic deformation of the first spring 04. In this way, the proximity switch clamping device provided in this application embodiment can adapt to proximity switches 09 of different sizes.

[0053] In some embodiments, the proximity switch clamping device further includes a limiting rod 11, and the sliding block 03 is provided with a limiting hole 032, which is an oblong hole. The limiting rod 11 passes through the limiting hole 032 and is connected to the pressure rod 05.

[0054] In this embodiment, the limiting hole 032 can limit the movement range of the limiting rod 11, and thus limit the movement range of the pressure rod 05 connected to the limiting rod 11. In this way, the pressure rod 05 can be prevented from falling out of the receiving hole of the sliding block 03.

[0055] In practical applications, one end of the limiting rod 11 is threaded, and the side of the pressure rod 05 facing the limiting hole 032 is threaded. The threaded end of the limiting rod 11 passes through the limiting hole 032 and is accommodated in the threaded hole so that the limiting rod 11 and the pressure rod 05 are threadedly connected.

[0056] In some embodiments, the proximity switch clamping device further includes a second rotating shaft 12, a cam 13, and a first handle 14. The first end of the second rotating shaft 12 is connected to the first handle 14, and the second end of the second rotating shaft 12 is connected to the cam 13. When the first handle 14 is rotated, the first handle 14 drives the cam 13 to rotate from a first position to a second position. When the cam 13 rotates from the first position to the second position, the longer part of the cam 13 contacts the stop rod 07. The movement trajectory of the cam 13 interferes with the stop rod 07, so as to push the stop rod 07 to rotate around the first rotating shaft 08 in a direction close to the second spring 06.

[0057] In some embodiments, the proximity switch clamping device further includes a third handle, which is disposed on the stop rod 07 and is used to push the stop rod 07 to rotate about the first pivot 08 in a direction close to the second spring 06.

[0058] In some embodiments, the proximity switch clamping device further includes a buffer pad 15, and the second end of the pressure rod 05 is provided with a blind hole, and the buffer pad 15 is provided in the blind hole. The buffer pad 15 can be adhered in the blind hole, and the second end of the pressure rod 05 abuts against the proximity switch 09 through the buffer pad 15.

[0059] In this embodiment, by setting the buffer pad 15, the second end of the pressure rod 05 can be prevented from directly contacting the proximity switch 09 and damaging the proximity switch 09.

[0060] In some embodiments, the proximity switch clamping device further includes a second handle 16, which is disposed on the sliding block 03 and is used to push the sliding block 03 to slide in a direction away from / near the proximity switch 09.

[0061] In practical applications, the second handle 16 and the sliding block 03 can also be integrally formed. The shape of the second handle 16 is not limited in this application embodiment. As long as the external force is applied to the second handle 16, the second handle 16 can stably drive the sliding block 03 to slide in the direction of approaching / moving away from the proximity switch 09.

[0062] In some embodiments, the bottom of the mounting hole 011 is V-shaped. The proximity switch 09 may be circular or square in structure. When the bottom of the mounting hole 011 is V-shaped, the proximity switch 09 is not easy to wobble within the mounting hole 011.

[0063] Figure 8 is a front view of a proximity switch clamping device provided in some embodiments of this application. Referring to Figures 2 and 8, in practical applications, the cover plate 02 is also provided with a terminal block 17, a socket 18 and a wire hole, and the rear seat 01 is provided with a wire groove 19. The terminal block 17, the wire hole and the wire groove 19 are arranged correspondingly. The proximity switch 09 is connected to the socket 18 through the terminal block 17 and the wire hole. The wire groove 19 is used to accommodate the connecting wire between the proximity switch 09 and the socket 18.

[0064] The cover plate 02 can be equipped with multiple sockets 18, which can be used as power interfaces, output interfaces of proximity switches 09, and reserved interfaces, respectively.

[0065] The cover plate 02 is also provided with a first through hole 021, a second through hole 022, and a third through hole 023. The first through hole 021 is corresponding to the sliding groove 013 and is used to expose the second handle 16. The second through hole 022 is corresponding to the mounting hole 011 and is used to expose the proximity switch 09. The third through hole 023 is corresponding to the second rotating shaft 12 and is used to expose the second rotating shaft 12 for connecting the first handle 14.

[0066] The proximity switch clamping device provided in this application embodiment may further include a bolt 20, a cover plate 02 having a fourth through hole, and a rear seat 01 having a connecting hole 014. The connecting hole 014 is a threaded hole. The bolt 20 passes through the fourth through hole on the cover plate 02 and is accommodated in the connecting hole 014 so that the cover plate 02 covers the rear seat 01.

[0067] Another embodiment of this application provides a proximity switch testing system. Figure 9 is a partial structural schematic diagram of the proximity switch testing system provided in some embodiments of this application, and Figure 10 is another partial structural schematic diagram of the proximity switch testing system provided in some embodiments of this application. Referring to Figures 9 and 10, the system includes a test box, a position feedback circuit 31, an input detection circuit 32, a temperature detection circuit 33, and a motor control circuit 34. The test box includes a motor 35, a detection plate 36, a sliding module 37, and a proximity switch clamping device provided in the aforementioned embodiments of this application. The motor 35 is used to drive the detection plate 36 to move closer to / away from the proximity switch clamping device along the sliding module 37. The position feedback circuit 31 is also connected to the motor 35 and is used to determine the distance between the detection plate 36 and the proximity switch clamping device. The input detection circuit 32 is connected to the output of the proximity switch 09. The temperature detection circuit 33 is used to detect the temperature inside the test box and can be connected to the output of the temperature sensor inside the test box. The motor control circuit 34 is used to control the working state of the motor 35.

[0068] Referring to Figures 1 and 8, the rear seat 01 of the proximity switch clamping device may also be provided with a first clearance hole 41, and the cover plate 02 may be provided with a second clearance hole 42. Both the first clearance hole 41 and the second clearance hole 42 are used to avoid the sliding module 37.

[0069] It is worth noting that the input detection circuit 32 is connected to the output of the proximity switch 09, specifically to the socket 18, which serves as the output interface of the proximity switch 09. By providing through-hole type mounting holes 011, first clearance holes 41, and second clearance holes 42, the proximity switch 09 can be made to make zero-distance contact with the detection board 36, resulting in more accurate test results.

[0070] Specifically, the input detection circuit 32 may also include a switch input detection sub-circuit and an analog input detection sub-circuit. For example, the switch input detection sub-circuit is used to detect NPN, PNP or push-pull proximity switches, and the analog input detection sub-circuit is used to detect proximity switches with analog outputs such as 4-20 mA, 1-5 volts and 0-10 volts.

[0071] Referring to Figure 9, during testing, the proximity switch clamping device can simultaneously test eight proximity switches 09 of different types and sizes. The detection plate 36 includes eight detection objects, each corresponding to one of the eight proximity switches 09 of different types and sizes. The motor control circuit 34 controls the motor 35 to drive the detection plate 36 along the sliding module 37 towards / away from the proximity switch clamping device. The position feedback circuit 31 continuously provides feedback on the distance between the detection plate 36 and the proximity switch clamping device. Combined with the output of the input detection circuit 32, the sensing distance of the proximity switch 09 at the current temperature can be determined. For example, for a PNP type proximity switch 09, when the distance between the detection plate 36 and the proximity switch clamping device is less than or equal to 10 mm, the output of the switch input detection sub-circuit is always high, indicating that the sensing distance of this proximity switch 09 at the current temperature is 10 mm. For example, for an inductive proximity switch 09, when the distance between the detection plate 36 and the proximity switch clamping device is less than or equal to 20 mm, the output of the analog input detection sub-circuit is 4-20 mA. When the distance between the detection plate 36 and the proximity switch clamping device is greater than 20 mm, the output of the analog input detection sub-circuit remains unchanged at 20 mA. This indicates that the sensing distance of the proximity switch 09 at the current temperature is 20 mm. By adjusting the temperature inside the test chamber to a range of -25℃ to 70℃, the sensing distance of the proximity switch 09 under test at different temperatures can be determined. After the sensing distance tests of the first eight proximity switches 09 at temperatures ranging from -25℃ to 70℃ are completed, the test chamber door can be opened. External force is applied to the first handle 14 to push the stop rod 07 to rotate around the first rotating shaft 08 in a direction close to the second spring 06. The end of the stop rod 07 separates from the ratchet 031, and the sliding block 03 slides away from the proximity switch 09 to replace it.

[0072] In practical applications, the proximity switch testing system provided in this application embodiment may further include a controller 38, a host computer, a power supply circuit, a support frame 39, and a tray 40. The power supply circuit supplies power to the proximity switch testing system. The support frame 39 supports the rear seat 01, the cover plate 02, and the detection plate 36. The tray 40 holds the motor 35, the detection plate 36, the sliding module 37, and the proximity switch clamping device provided in the aforementioned embodiment of this application. The controller 38 can determine the distance between the detection plate 36 and the proximity switch clamping device through the position feedback circuit 31. The controller 38 can determine the sensing distance of the proximity switch 09 at different temperatures through the distance between the detection plate 36 and the proximity switch clamping device, the output of the input detection circuit 32, and the output of the temperature detection circuit 33. The controller 38 can control the switching and speed of the motor 35 through the motor control circuit 34. The controller 38 can also be connected to a host computer, transmitting the output of the input detection circuit 32 and the output of the temperature detection circuit 33 to the host computer for remote viewing, data recording, and data analysis.

[0073] The proximity switch testing system provided in this application embodiment can stably clamp proximity switches 09 of different shapes and sizes and determine their sensing distance at different temperatures.

[0074] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0075] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A proximity switch clamping device, characterized in that, The proximity switch clamping device includes: multiple clamping modules, a rear seat, and a cover plate; the cover plate covers the rear seat and the clamping modules, and the clamping module includes a sliding block, a first spring, a pressure rod, a second spring, a stop rod, and a first rotating shaft; the rear seat has a mounting hole, a second groove, and a sliding groove, which are connected; the mounting hole is used to place the proximity switch, the second groove is used to place the stop rod and the first rotating shaft, and the sliding groove is used to slide with the sliding block; the sliding block has a receiving hole at one end facing the mounting hole, and a ratchet is provided on the side of the sliding block; the first spring is located in the receiving hole, the first end of the first spring is connected to the sliding block, and the second end of the first spring... The first end of the pressure rod abuts against the first end of the pressure rod, and the second end of the pressure rod is used to press the proximity switch; the stop rod rotates around the first rotating shaft, the first end of the second spring is connected to the groove wall of the second groove, and the second end of the second spring is connected to the side of the stop rod; when the clamping module clamps the proximity switch, the end of the stop rod abuts against the ratchet under the combined force of the pressure of the sliding block and the elastic force of the second spring, and the second end of the pressure rod abuts against the proximity switch under the elastic force of the first spring; the stop rod rotates around the first rotating shaft in a direction close to the second spring, the end of the stop rod separates from the ratchet, and the sliding block slides in a direction away from the proximity switch to replace the proximity switch.

2. The proximity switch clamping device according to claim 1, characterized in that, The proximity switch clamping device also includes a limiting rod, the sliding block is provided with a limiting hole, and the limiting rod passes through the limiting hole and is connected to the pressure rod.

3. The proximity switch clamping device according to claim 2, characterized in that, One end of the limiting rod is threaded, and the side of the pressure rod facing the limiting hole is threaded. The threaded end of the limiting rod passes through the limiting hole and is accommodated in the threaded hole, so that the limiting rod and the pressure rod are threadedly connected.

4. The proximity switch clamping device according to claim 1, characterized in that, The proximity switch clamping device further includes a second rotating shaft, a cam, and a first handle. The first end of the second rotating shaft is connected to the first handle, and the second end of the second rotating shaft is connected to the cam. When the first handle is rotated, the first handle drives the cam to rotate from a first position to a second position, thereby pushing the stop rod to rotate around the first rotating shaft in a direction close to the second spring.

5. The proximity switch clamping device according to claim 1, characterized in that, The proximity switch clamping device further includes a buffer pad, and the second end of the pressure rod is provided with a blind hole, in which the buffer pad is provided, and the second end of the pressure rod abuts against the proximity switch through the buffer pad.

6. The proximity switch clamping device according to claim 1, characterized in that, The proximity switch clamping device further includes a second handle, which is disposed on the sliding block and is used to push the sliding block to slide in a direction away from / near the proximity switch.

7. The proximity switch clamping device according to claim 1, characterized in that, The proximity switch clamping device further includes a third handle, which is disposed on the stop rod and is used to push the stop rod to rotate around the first pivot in a direction close to the second spring.

8. The proximity switch clamping device according to claim 1, characterized in that, The bottom of the mounting hole is V-shaped.

9. A proximity switch testing system, characterized in that, The system includes a test box, a position feedback circuit, an input detection circuit, a temperature detection circuit, and a motor control circuit; the test box includes a motor, a detection plate, a sliding module, and a proximity switch clamping device as described in any one of claims 1-8; the motor is used to drive the detection plate to move closer to / away from the proximity switch clamping device along the sliding module. The position feedback circuit is also connected to the motor, and the position feedback circuit is used to determine the distance between the detection plate and the proximity switch clamping device; the input detection circuit is connected to the output of the proximity switch; the temperature detection circuit is used to detect the temperature inside the test chamber; The motor control circuit is used to control the operating state of the motor.

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