A test device for a contact
By designing a contact testing device that uses a rotating shaft and cam to drive the movement of a rectangular frame, the problems of insufficient frequency control accuracy and stability in existing devices are solved, achieving precise control and efficient testing of the contact switching frequency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN XINFENG NEW MATERIALS CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-21
AI Technical Summary
Existing contact testing devices are inadequate in simulating the dynamic switching process of actual contact operation and in accurately controlling the switching frequency. They are difficult to stably and efficiently simulate the frequent switching cycles of contacts under different operating conditions, and the switching frequency control accuracy is low.
A contact testing device was designed, which uses a rotating shaft and cam inside the housing to drive a rectangular frame to move vertically back and forth, so that the contact contacts contact and disengage from the contact seat. The switching frequency is changed by controlling the rotation speed of the cam, and the device is equipped with components such as a motor, nozzle, lighting lamp and electric telescopic rod to achieve precise control and testing.
It achieves precise control of the contact switching frequency, improves the stability and efficiency of testing, and can better simulate the frequent switching cycles of contacts under different operating conditions, meeting diverse testing needs.
Smart Images
Figure CN224536098U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of contact detection technology, and in particular to a contact testing device. Background Technology
[0002] In the field of electrical equipment, contacts are key components, and their switching performance and stability directly affect the overall operational reliability of the equipment. Testing contacts for mechanical life and switching characteristics is a necessary step to ensure product quality and safety.
[0003] Existing contact testing methods have shortcomings in simulating the dynamic switching process of actual contacts and in accurately controlling the switching frequency and contact state. Traditional testing devices have simple structures, rely heavily on manual operation, and are not easy to stably and efficiently simulate the frequent switching cycles of contacts under different operating conditions. Furthermore, their control over the switching frequency is not precise enough to accurately meet diverse testing needs. Utility Model Content
[0004] This invention provides a contact testing device to solve the problem that existing devices are not easy to control the contact switching frequency.
[0005] To alleviate the above-mentioned technical problems, the technical solution provided by this utility model is as follows:
[0006] A contact testing device includes a housing, a rotating shaft rotatably connected inside the housing, a cam fixedly connected to the middle of the rotating shaft, a rectangular frame vertically slidably connected inside the housing, the cam being inserted into the rectangular frame, a contact being mounted on the rectangular frame, and a contact seat being mounted on the bottom wall of the housing. When the cam rotates, it can drive the rectangular frame to move vertically reciprocally, thereby causing the contact to contact and disengage from the contact seat.
[0007] Furthermore, a motor is fixedly connected inside the housing, and the rotating shaft is fixedly connected to the output end of the motor.
[0008] Furthermore, both ends of the cam are fixedly connected to limit plates, and the two limit plates are respectively attached to the two symmetrical surfaces of the rectangular frame.
[0009] Furthermore, a mounting post is fixedly connected to the lower part of the rectangular frame, and a mounting block is rotatably connected to the mounting post, with the contact inserted into the mounting block;
[0010] The mounting block is threaded with a first nut and a second nut. Tightening the first nut locks the contact to the mounting block, and tightening the second nut locks the mounting block to the mounting post.
[0011] Furthermore, two nozzles are symmetrically connected on both sides of the contact inside the housing.
[0012] Furthermore, a guide rod is fixedly connected to the upper part of the rectangular frame, and a through hole that mates with the guide rod is opened on the top wall of the box.
[0013] Furthermore, a piston cylinder is fixedly connected to the housing, the guide rod is slidably connected to the piston cylinder, an extraction pipe and a discharge pipe are connected to the piston cylinder, a one-way valve is provided on both the extraction pipe and the discharge pipe, and the nozzle is connected to the discharge pipe.
[0014] Furthermore, a liquid supply pipe is connected to the extraction pipe, and an electromagnetic three-way valve is provided at the connection between the liquid supply pipe and the extraction pipe. When the speed of the motor is higher than a set threshold, the electromagnetic three-way valve operates, causing the piston cylinder to extract coolant through the liquid supply pipe.
[0015] Furthermore, an illumination lamp facing the contacts is installed inside the housing;
[0016] A door is hinged to the box body, and a switch for controlling the lighting is installed on the inner wall of the box body. When the box door is closed, the box door applies pressure to the switch, thereby turning off the lighting.
[0017] Furthermore, an electric telescopic rod is fixedly connected to the bottom wall of the housing, and a mounting platform is fixedly connected to the output end of the electric telescopic rod, with the contact seat mounted on the mounting platform.
[0018] The beneficial effects of this utility model are analyzed as follows:
[0019] A contact testing device includes a housing, a rotating shaft rotatably connected inside the housing, a cam fixedly connected to the middle of the rotating shaft, a rectangular frame vertically slidably connected inside the housing, the cam being inserted into the rectangular frame, a contact being installed in the rectangular frame, and a contact seat being installed on the bottom wall of the housing. When the cam rotates, it can drive the rectangular frame to move vertically back and forth, thereby causing the contact to contact and disengage from the contact seat.
[0020] The contact to be tested is installed at the bottom of the rectangular frame. The cam is manually rotated to move the rectangular frame down to the bottom of its travel. At this time, the contact seat is moved up to the position where it contacts the contact. Then the position of the contact seat is locked, and the cam is rotated again. The cam drives the rectangular frame to move vertically, so that the contact can contact or move away from the contact seat. By controlling the rotation speed of the cam, the switching frequency between the contact and the contact seat is changed. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0024] Figure 3 This is a schematic diagram of the structure of the mounting block of this utility model;
[0025] Figure 4 This is a schematic diagram of the cam structure of this utility model;
[0026] Figure 5 This is a schematic diagram of the piston cylinder of this utility model.
[0027] icon:
[0028] 100. Housing; 110. Door; 200. Motor; 210. Shaft; 220. Cam; 230. Limiting plate; 240. Rectangular frame; 250. Guide rod; 260. Mounting block; 261. Mounting column; 262. First nut; 263. Second nut; 300. Mounting platform; 310. Contact seat; 320. Electric telescopic rod; 400. Piston cylinder; 410. Discharge pipe; 420. Nozzle; 430. Extraction pipe; 440. Liquid supply pipe; 450. Solenoid three-way valve; 500. Lighting lamp; 510. Switch. Detailed Implementation
[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0032] like Figures 1-5 As shown, a contact testing device includes a housing 100, a rotating shaft 210 rotatably connected inside the housing 100, a cam 220 fixedly connected to the middle of the rotating shaft 210, a rectangular frame 240 vertically slidably connected inside the housing 100, the cam 220 being inserted into the rectangular frame 240, a contact being mounted on the rectangular frame 240, and a contact seat 310 being mounted on the bottom wall of the housing 100. When the cam 220 rotates, it can drive the rectangular frame 240 to move vertically back and forth, thereby causing the contact to contact and disengage from the contact seat 310.
[0033] The working mechanism of the contact testing device provided in this embodiment is as follows:
[0034] The contact to be tested is installed at the lower part of the rectangular frame 240. The cam 220 is manually rotated to move the rectangular frame 240 down to the lowest point of its travel. At this time, the contact seat 310 is controlled to move up to the position of contacting the contact. Then the position of the contact seat 310 is locked, and the cam 220 is rotated again. Thus, the cam 220 drives the rectangular frame 240 to move vertically, so that the contact can contact or move away from the contact seat 310. By controlling the rotation speed of the cam 220, the switching frequency between the contact and the contact seat 310 is changed.
[0035] During retesting, testing equipment such as a micro-ohmmeter is electrically connected to the contact box contact base 310 via wires. A certain load can also be applied to the wires. When the contact comes into contact with the contact base 310, a circuit is formed. The testing equipment can be activated after the contact moves up and down multiple times and comes into contact with the contact base 310. At this time, it can be detected whether the contact can still be used normally after multiple on and off actions.
[0036] Among the optional methods in this embodiment, the more preferred one is:
[0037] A motor 200 is fixedly connected inside the housing 100, and a rotating shaft 210 is fixedly connected to the output end of the motor 200.
[0038] When the motor 200 is running, it drives the rotating shaft 210 to rotate, which in turn causes the cam 220 to rotate and drive the rectangular frame 240 to move.
[0039] Among the optional methods in this embodiment, the more preferred one is:
[0040] Both ends of the cam 220 are fixedly connected to limit plates 230, and the two limit plates 230 are respectively attached to the two symmetrical surfaces of the rectangular frame 240.
[0041] The two limiting plates 230 are set so that the cam 220 can be stably positioned in the middle of the rectangular frame 240, preventing the cam 220 from detaching from the rectangular frame 240.
[0042] Among the optional methods in this embodiment, the more preferred one is:
[0043] A mounting post 261 is fixedly connected to the lower part of the rectangular frame 240. A mounting block 260 is rotatably connected to the mounting post 261, and the contact is inserted into the mounting block 260. A first nut 262 and a second nut 263 are threadedly connected to the mounting block 260. Tightening the first nut 262 can lock the contact to the mounting block 260, and tightening the second nut 263 can lock the mounting block 260 to the mounting post 261.
[0044] After removing the first nut 262, the contact to be tested is inserted into the mounting block 260. Then, the first nut 262 is tightened to lock the contact in the mounting block 260. By removing or tightening the second nut 263, the mounting block 260 can be rotated relative to the mounting post 261. Thus, after testing the contact, the mechanical damage of the contact can be observed by rotating the mounting block 260.
[0045] Among the optional methods in this embodiment, the more preferred one is:
[0046] Two nozzles 420 are symmetrically connected on both sides of the contact inside the housing 100.
[0047] As the contact movement frequency increases, two nozzles 420 spray coolant onto the contacts. The coolant can be transformer oil or electronic fluorinated fluid, etc., so that the heat of the contacts operating at high frequency can be controlled.
[0048] Among the optional methods in this embodiment, the more preferred one is:
[0049] A guide rod 250 is fixedly connected to the upper part of the rectangular frame 240, and a through hole that mates with the guide rod 250 is opened on the top wall of the box 100.
[0050] The guide rod 250 guides the movement trajectory of the rectangular frame 240, allowing the rectangular frame 240 to move only along the axial direction of the guide rod 250.
[0051] Among the optional methods in this embodiment, the more preferred one is:
[0052] A piston cylinder 400 is fixedly connected to the housing 100, and a guide rod 250 is slidably connected to the piston cylinder 400. An extraction pipe 430 and a discharge pipe 410 are connected to the piston cylinder 400. A one-way valve is provided on both the extraction pipe 430 and the discharge pipe 410, and a nozzle 420 is connected to the discharge pipe 410.
[0053] As the rectangular frame 240 moves vertically back and forth, the guide rod 250 slides back and forth inside the piston cylinder 400, thereby the piston cylinder 400 draws air or coolant through the extraction pipe 430 and then sprays the air or coolant to the contact through the discharge pipe 410 and the nozzle 420.
[0054] Among the optional methods in this embodiment, the more preferred one is:
[0055] A liquid supply pipe 440 is connected to the extraction pipe 430. An electromagnetic three-way valve 450 is installed at the connection between the liquid supply pipe 440 and the extraction pipe 430. When the speed of the motor 200 is higher than the set threshold, the electromagnetic three-way valve 450 operates, causing the piston cylinder 400 to extract coolant through the liquid supply pipe 440.
[0056] The electromagnetic three-way valve 450 is used to control the external air to enter the piston cylinder 400 directly through the extraction pipe 430, or to disconnect the extraction pipe 430 from the external air and connect the extraction pipe 430 to the liquid supply pipe 440.
[0057] Before the device is put into operation, the operating parameters of the electromagnetic three-way valve 450 are first set. That is, the movement frequency of the contact is obtained by detecting the speed of the motor 200, and the speed threshold of the motor 200 is set. When the speed of the motor 200 exceeds this threshold, the electromagnetic three-way valve 450 is put into operation, so that the extraction pipe 430 is connected to the liquid supply pipe 440 and is no longer connected to the outside air, so that the coolant enters the piston cylinder 400 through the liquid supply pipe 440.
[0058] Among the optional methods in this embodiment, the more preferred one is:
[0059] An illumination lamp 500 facing the contacts is installed inside the enclosure 100; an enclosure door 110 is hinged to the enclosure 100, and a switch 510 for controlling the illumination lamp 500 is installed on the inner wall of the enclosure 100. When the enclosure door 110 is closed, the enclosure door 110 applies pressure to the switch 510, thereby turning off the illumination lamp 500.
[0060] When the door 110 is closed, pressing the switch 510 turns off the light 500. When it is opened, pressing the switch 510 again turns on the light 500, which is directed toward the contacts, making it easier to observe the degree of mechanical damage to the contacts.
[0061] Among the optional methods in this embodiment, the more preferred one is:
[0062] An electric telescopic rod 320 is fixedly connected to the bottom wall of the housing 100. The output end of the electric telescopic rod 320 is fixedly connected to the mounting platform 300, and the contact seat 310 is mounted on the mounting platform 300.
[0063] By controlling the extension length of the electric telescopic rod 320, the height of the mounting platform 300 is changed, thereby changing the height of the contact seat 310, so that the contact can make contact with the contact seat 310 each time it moves down.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model 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 or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A contact testing device, characterized in that: The device includes a housing (100), a rotating shaft (210) is rotatably connected inside the housing (100), a cam (220) is fixedly connected to the middle of the rotating shaft (210), a rectangular frame (240) is vertically slidably connected inside the housing (100), the cam (220) is inserted into the rectangular frame (240), a contact is installed in the rectangular frame (240), and a contact seat (310) is installed on the bottom wall of the housing (100). When the cam (220) rotates, it can drive the rectangular frame (240) to move vertically back and forth, thereby causing the contact to contact and disengage from the contact seat (310).
2. The contact testing device according to claim 1, characterized in that: A motor (200) is fixedly connected inside the housing (100), and the rotating shaft (210) is fixedly connected to the output end of the motor (200).
3. The contact testing device according to claim 2, characterized in that: Both ends of the cam (220) are fixedly connected to limit plates (230), and the two limit plates (230) are respectively attached to the two symmetrical surfaces of the rectangular frame (240).
4. The contact testing device according to claim 3, characterized in that: The lower part of the rectangular frame (240) is fixedly connected to a mounting post (261), and a mounting block (260) is rotatably connected to the mounting post (261), with the contact inserted into the mounting block (260). The mounting block (260) is threaded with a first nut (262) and a second nut (263). Tightening the first nut (262) can lock the contact to the mounting block (260), and tightening the second nut (263) can lock the mounting block (260) to the mounting post (261).
5. The contact testing device according to claim 2, characterized in that: The housing (100) contains two nozzles (420) symmetrically connected on both sides of the contact.
6. The contact testing device according to claim 5, characterized in that: A guide rod (250) is fixedly connected to the upper part of the rectangular frame (240), and a through hole that cooperates with the guide rod (250) is opened on the top wall of the box (100).
7. The contact testing apparatus according to claim 6, characterized in that: A piston cylinder (400) is fixedly connected to the housing (100), and a guide rod (250) is slidably connected to the piston cylinder (400). An extraction pipe (430) and a discharge pipe (410) are connected to the piston cylinder (400). A one-way valve is provided on both the extraction pipe (430) and the discharge pipe (410). The nozzle (420) is connected to the discharge pipe (410).
8. The contact testing apparatus according to claim 7, characterized in that: The extraction pipe (430) is connected to a liquid supply pipe (440). An electromagnetic three-way valve (450) is provided at the connection between the liquid supply pipe (440) and the extraction pipe (430). When the speed of the motor (200) is higher than the set threshold, the electromagnetic three-way valve (450) operates, so that the piston cylinder (400) draws coolant through the liquid supply pipe (440).
9. The contact testing device according to claim 1, characterized in that: The housing (100) is equipped with a light (500) facing the contact. A door (110) is hinged to the housing (100). A switch (510) for controlling the lighting lamp (500) is installed on the inner wall of the housing (100). When the door (110) is closed, the door (110) applies pressure to the switch (510), thereby turning off the lighting lamp (500).
10. The contact testing device according to claim 1, characterized in that: An electric telescopic rod (320) is fixedly connected to the bottom wall of the housing (100), and an installation platform (300) is fixedly connected to the output end of the electric telescopic rod (320). The contact seat (310) is installed on the installation platform (300).