Auxiliary contacts and contactors
By designing an oblique guide rib and a slidingly connected dynamic contact bridge in the auxiliary contact, the self-cleaning function of dynamic contacts and static contacts is realized, solving the problem of foreign matter or dust affecting contact reliability, and improving working reliability and current conduction reliability.
Patent Information
- Application Number
- CN202421008644.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In complex usage environments, the auxiliary contact module is prone to foreign matter or dust, affecting the contact reliability between the static contact and the moving contact, and may lead to electrical accidents.
An auxiliary contact is designed, including a housing, a static contact, a contact support, a moving contact bridge and an elastic member. By providing an oblique guide rib on the contact support and slidably connecting the moving contact bridge thereto, the moving contact and the static contact slide relative to each other during contact and separation, and impurities on the contact surface are removed.
It improves the contact reliability between the dynamic contact and the static contact, enhances the working reliability of the auxiliary contact, and reduces the risk of current not conducting.
Smart Images
Figure CN222705395U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of contactors, in particular to an auxiliary contact and a contactor. Background Art
[0002] Contactors are mainly used to frequently connect or disconnect AC and DC main circuits and large-capacity control circuits. Auxiliary contact modules are a common accessory on contactors. They are usually hung on the top or side of the contactor and move with the contactor. They are often used to control other electrical equipment or detect the working status of other circuits.
[0003] As the operating environment of contactors becomes more complex, such as dust and humidity, foreign matter or dust can easily enter the auxiliary contact module. If foreign matter or dust stays on the contact surface of the static contact or the moving contact, it will affect the contact reliability between the static contact and the moving contact, and it is easy for the contact to not conduct under low voltage and low current conditions, causing unpredictable electrical accidents.
[0004] Therefore, it is urgent to propose an auxiliary contact and a contactor to solve the above technical problems. Utility Model Content
[0005] According to one aspect of the utility model, the utility model provides an auxiliary contact, which can self-clean the contact surface between the moving contact and the static contact during the connection and disconnection process, thereby improving the contact reliability between the moving contact and the static contact, and further improving the working reliability of the auxiliary contact.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] Auxiliary contacts, including:
[0008] case;
[0009] A stationary contactor is arranged in the housing, wherein a stationary contact point is arranged on the stationary contactor, and a plurality of first stripes arranged at intervals are arranged on a contact surface of the stationary contact point, and a first material receiving groove is formed between two adjacent first stripes;
[0010] A contact support is slidably assembled in the housing, an installation space is provided on the contact support, and an oblique guide rib is provided on the side wall of the installation space;
[0011] A moving contact bridge is arranged in the installation space and slidably connected to the oblique guide rib, the moving contact bridge is provided with a moving contact corresponding to the static contact, a contact surface of the moving contact is provided with a plurality of second stripes arranged at intervals, and a second material receiving groove is formed between two adjacent second stripes;
[0012] An elastic member, one end of which is connected to the inner wall of the installation space, and the other end of which is connected to the moving contact bridge;
[0013] During the contact and separation process between the moving contact and the static contact, the moving contact slides relative to the static contact under the guidance of the oblique guide ribs to scrape impurities on the moving contact and the static contact into the first material receiving trough or the second material receiving trough.
[0014] Optionally, the first material receiving trough is perpendicular to the second material receiving trough.
[0015] Optionally, the width of the first material receiving groove is 0.5mm-0.6mm; and / or the width of the second material receiving groove is 0.5mm-0.6mm.
[0016] Optionally, the angle between the oblique guide rib and the movement direction of the contact support is 11°-13°.
[0017] Optionally, two oppositely arranged clamping arms are provided on one side of the middle part of the moving contact bridge, and the two clamping arms form a clamping groove, and the clamping groove is slidably clamped to the oblique guide rib.
[0018] Optionally, the oblique guide ribs are provided on opposite side walls of the installation space, the clamping grooves are provided on opposite sides of the middle part of the moving contact bridge, and the clamping grooves are arranged in a one-to-one correspondence with the oblique guide ribs.
[0019] Optionally, at least two moving contacts are provided on one side of the moving contact bridge, and at least two moving contacts can be in contact with corresponding static contacts at the same time.
[0020] Optionally, an anti-stack-up slope is provided at one end of the static contact away from the static contact point, and the anti-stack-up slope is used to prevent two adjacent static contacts on a static contact conveying line from stacking.
[0021] Optionally, the shell has a limit arm extending toward the static contact, the static contact is provided with a limit protrusion, and the side surface of the limit protrusion abuts against the side surface of the limit arm to limit the displacement of the static contact in the horizontal direction.
[0022] According to another aspect of the utility model, the utility model further provides a contactor, comprising a contactor body and the auxiliary contact described in any one of the above technical solutions, wherein the auxiliary contact is laterally hung on the contactor body.
[0023] Beneficial effects of the utility model:
[0024] The utility model provides an auxiliary contact, comprising a housing, a static contact, a contact support, a moving contact bridge and an elastic member. By arranging an oblique guide rib on the contact support and slidingly connecting with the moving contact bridge, the moving contact bridge drives the moving contact to move in both a vertical direction and a horizontal direction, that is, after the moving contact contacts the static contact, as the moving contact continues to move, the moving contact will slide relative to the static contact, and the sliding can scrape the contact surface of the moving contact and the static contact to remove impurities on the contact surface of the moving contact and the static contact, thereby ensuring reliable connection between the moving contact and the static contact.
[0025] A plurality of first stripes are arranged on the static contact and a plurality of second stripes are arranged on the moving contact. On the one hand, the plurality of first stripes and the plurality of second stripes can contact each other, thereby improving the contact point position between the static contact and the moving contact, and being beneficial to improving the contact reliability between the static contact and the moving contact. On the other hand, the first material receiving groove formed between adjacent first stripes and the second material receiving groove formed between adjacent second stripes can both receive impurities scraped off the contact surface of the static contact and the moving contact, thereby preventing the impurities from falling into other parts of the shell and affecting the normal operation of other components, and improving the working reliability of the auxiliary contact.
[0026] During the mutual scraping between the moving contact and the stationary contact, the elastic member can keep the moving contact pressed against the stationary contact with a certain pressure by its own elastic force, thereby improving the reliability of the self-cleaning work of the moving contact and the stationary contact.
[0027] The utility model also provides a contactor, comprising a contactor body and the auxiliary contact. Due to the use of the auxiliary contact, the contactor has a lower risk of current non-conduction and a higher working reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.
[0029] Figure 1 It is a partial diagram of the internal structure schematic diagram of the auxiliary contact provided by the embodiment of the utility model;
[0030] Figure 2 It is a partial diagram of the assembly diagram of the contact support, the moving contact bridge and the elastic member provided in the embodiment of the utility model;
[0031] Figure 3 It is a partial view of a cross-sectional view of a contact support, a moving contact bridge and an elastic member provided in an embodiment of the utility model;
[0032] Figure 4 It is a structural schematic diagram of a moving contact bridge provided by an embodiment of the utility model;
[0033] Figure 5 It is a structural schematic diagram of a static contact provided in an embodiment of the utility model.
[0034] In the figure:
[0035] 100, housing; 110, limiting arm;
[0036] 200, static contact; 210, static contact point; 211, first stripe; 212, first material receiving groove; 220, anti-stacked material slope; 230, limiting protrusion;
[0037] 300, contact support; 310, installation space; 311, oblique guide rib;
[0038] 400, moving contact bridge; 410, moving contact point; 411, second stripe; 412, second material receiving slot; 420, clamping arm; 421, clamping slot;
[0039] 500. Elastic parts. DETAILED DESCRIPTION
[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0043] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0044] This embodiment provides an auxiliary contact, which can self-clean the contact surfaces of the moving contact and the static contact during the connection and disconnection processes, thereby improving the contact reliability between the moving contact and the static contact, and further improving the working reliability of the auxiliary contact.
[0045] Specifically, Figure 1-Figure 5 As shown, the auxiliary contact includes a housing 100 , a stationary contact 200 , a contact support 300 , a moving contact bridge 400 and an elastic member 500 .
[0046] The stationary contact 200 is arranged in the housing 100, and a stationary contact point 210 is arranged on the stationary contact 200. A plurality of first stripes 211 arranged at intervals are arranged on the contact surface of the stationary contact point 210, and a first material receiving groove 212 is formed between two adjacent first stripes 211, and the first material receiving groove 212 is used to receive impurities.
[0047] The contact support 300 is slidably assembled in the housing 100, and an installation space 310 is provided on the contact support 300, and an oblique guide rib 311 is provided on the side wall of the installation space 310. The moving contact bridge 400 is arranged in the installation space 310 and is slidably connected to the oblique guide rib 311. The moving contact bridge 400 is provided with a moving contact 410 corresponding to the static contact 210, and a plurality of second stripes 411 arranged at intervals are provided on the contact surface of the moving contact 410, and a second material receiving groove 412 is formed between two adjacent second stripes 411, and the second material receiving groove 412 is used to receive impurities.
[0048] One end of the elastic member 500 is connected to the inner wall of the installation space 310, and the other end is connected to the moving contact bridge 400. The elastic member 500 is used to provide elastic force for the moving contact bridge 400, which can not only buffer the contact and disconnection between the moving contact 410 and the static contact 210, but also enable the moving contact 410 to contact the static contact 210 with a certain pressure, thereby improving the reliability of the contact between the moving contact 410 and the static contact 210, and thereby improving the reliability of current conduction.
[0049] The working process of the auxiliary contact is:
[0050] During the process of connecting the moving contact 410 with the stationary contact 210, the contact support 300 drives the moving contact bridge 400 to move toward the stationary contact 200. Before the moving contact 410 on the moving contact bridge 400 contacts the stationary contact 210 on the stationary contact 200, the moving contact bridge 400 will not slide relative to the oblique guide rib 311, that is, the movement direction of the moving contact 410 is the same as the movement direction of the contact support 300 (only vertical displacement). After the moving contact 410 contacts the static contact 210, the contact support 300 will continue to move for a distance. At this time, the static contact 210 will hinder the moving contact 410 from continuing to move with the contact support 300, that is, the moving contact bridge 400 will slide on the inclined guide rib 311, so that the moving contact 410 will slide relative to the static contact 210, that is, the contact surface of the moving contact 410 and the contact surface of the static contact 210 will slide and scrape each other, and the impurities on the contact surface of the moving contact 410 and the contact surface of the static contact 210 will be hung in the first material receiving groove 212 and the second material receiving groove 412, so as to clean the contact surface of the moving contact 410 and the contact surface of the static contact 210, avoid the influence of the presence of impurities on the connection between the moving contact 410 and the static contact 210, and improve the reliability of the auxiliary contact.
[0051] During the mutual scraping between the movable contact 410 and the stationary contact 210 , the elastic member 500 can keep the movable contact 410 pressed against the stationary contact 210 at a certain pressure by its own elastic force, thereby improving the reliability of the self-cleaning work of the movable contact 410 and the stationary contact 210 .
[0052] Furthermore, the plurality of first stripes 211 and the plurality of second stripes 411 can improve the contact point position between the static contact 210 and the moving contact 410, which is beneficial to improving the contact reliability between the static contact 210 and the moving contact 410. The first receiving groove 212 and the second receiving groove 412 can both receive impurities scraped off the contact surface between the static contact 210 and the moving contact 410, thereby preventing the impurities from falling into other parts of the housing 100 and affecting the normal operation of other components, thereby improving the working reliability of the auxiliary contact.
[0053] Optionally, in this embodiment, the first receiving groove 212 is perpendicular to the second receiving groove 412. This arrangement can prevent the first receiving groove 212 from completely covering the second receiving groove 412 and affecting the normal contact between the static contact 210 and the moving contact 410. In other embodiments, the first receiving groove 212 and the second receiving groove 412 can also be arranged in other ways according to actual needs, and this application does not make specific limitations.
[0054] Optionally, in one possible embodiment, the width of the first receiving groove 212 is 0.5 mm-0.6 mm. In another possible embodiment, the width of the second receiving groove 412 is 0.5 mm-0.6 mm. In this embodiment, the width of the first receiving groove 212 is 0.5 mm-0.6 mm, and the width of the second receiving groove 412 is 0.5 mm-0.6 mm.
[0055] Further, see Figure 3 In this embodiment, the angle a between the oblique guide rib 311 and the moving direction of the contact support 300 is 11°-13°. This arrangement can ensure that the moving contact 410 and the static contact 210 maintain reliable contact within the moving range of the contact support 300.
[0056] Further, see Figure 3 and Figure 4 Two clamping arms 420 are arranged opposite to each other on one side of the middle of the moving contact bridge 400. The two clamping arms 420 form a clamping groove 421, and the clamping groove 421 is slidably clamped to the oblique guide rib 311. The sliding connection between the moving contact bridge 400 and the oblique guide rib 311 is realized by clamping, which has a simple structure, is easy to assemble, and has better sliding smoothness.
[0057] Optionally, in this embodiment, the clamping arm 420 is formed by bending, which is easy to process, and the bending angle and position can be flexibly adjusted according to the width of the oblique guide rib 311 to be suitable for oblique guide ribs 311 of different sizes. The assembly flexibility is high, which improves the universality of the moving contact bridge 400.
[0058] Optionally, continue to see Figure 2 and Figure 4 In this embodiment, oblique guide ribs 311 are provided on opposite side walls of the installation space 310, and clamping grooves 421 are provided on opposite sides of the middle of the moving contact bridge 400, and the clamping grooves 421 are arranged one by one corresponding to the oblique guide ribs 311. Such an arrangement enables the opposite sides of the moving contact bridge 400 to be slidably connected to the oblique guide ribs 311, which can improve the force uniformity of the moving contact bridge 400, reduce the risk of jamming when the moving contact bridge 400 slides relative to the oblique guide ribs 311, that is, improve the smoothness of the movement of the moving contact bridge 400 on the oblique guide ribs 311, and further improve the reliability of the self-cleaning of the moving contact 410 and the static contact 210.
[0059] Further, see Figure 1 and Figure 4 At least two moving contacts 410 are provided on one side of the moving contact bridge 400, and at least two moving contacts 410 can simultaneously contact the corresponding stationary contacts 210. With such a configuration, when one of the moving contacts 410 fails to reliably contact the stationary contact 210, the contact between the remaining moving contacts 410 and the stationary contact 210 can also ensure the reliable connection of the auxiliary contact, thereby improving the reliability of the auxiliary contact operation.
[0060] In this embodiment, a plurality of independent contact arms are provided on one side of the moving contact bridge 400, and a moving contact 410 is provided at the end of each contact arm. Such a configuration can ensure that each moving contact 410 does not affect each other, thereby further improving the reliability of the contact between the moving contact 410 and the static contact 210.
[0061] Furthermore, in order to ensure reliable contact between at least two moving contacts 410 and one stationary contact 210 , the contact surface of the stationary contact 210 covers the contact surfaces of all the moving contacts 410 .
[0062] Optionally, the contact surface of the moving contact 410 may be in a spherical, flat, or irregular shape, etc. The contact surface of the stationary contact 210 may also be in a spherical, flat, or irregular shape, etc.
[0063] Optionally, the moving contact 410 can be fixed on the moving contact bridge 400 by welding. The welding process can reduce the total weight of the moving contact bridge 400, so that it has good electrical conductivity and vibration resistance, and reduces the risk of the moving contact 410 falling off or loosening during operation; the welding process is suitable for moving contacts 410 of various shapes and materials, and can meet various connection requirements; in frequent switching operations, the moving contact 410 fixed by welding has stronger wear resistance and oxidation resistance; the welding process is simple to operate, has high production efficiency, is suitable for automated assembly, and can reduce the production cost of auxiliary contacts. Of course, the moving contact 410 can also be fixed on the moving contact bridge 400 by riveting, which can be set according to actual needs, and this application does not make specific restrictions.
[0064] Optionally, the stationary contact 210 may be fixed to the stationary contact 200 by welding or by riveting.
[0065] Further, see Figure 1 and Figure 5The housing 100 has a limit arm 110 extending in the direction of the stationary contact 200. The stationary contact 200 is provided with a limit protrusion 230. The side of the limit protrusion 230 abuts against the side of the limit arm 110 to limit the horizontal displacement of the stationary contact 200. Through the cooperation between the limit arm 110 and the limit protrusion 230, the installation of the stationary contact 200 can be limited, and the accuracy of the installation position of the stationary contact 200 is improved to ensure that the stationary contact 210 can reliably contact the moving contact 410.
[0066] Optionally, in this embodiment, the cross section of the limiting protrusion 230 is triangular. In other embodiments, the shape of the limiting protrusion 230 can also be set to other shapes, such as a cube shape, etc., according to actual needs, and this application does not make specific limitations.
[0067] In the process of automated assembly, the static contact conveyor line is used to convey the static contact 200. All the static contacts 200 on the static contact conveyor line are oriented in the same direction. If the rear end of the previous static contact 200 is stacked with the front end of the next static contact 200, it will affect the robot's handling of the static contact 200. Figure 5 In this embodiment, an anti-stacking slope 220 is provided at one end of the static contact 200 away from the static contact point 210. If the front end of the subsequent static contact 200 is stacked on the anti-stacking slope 220 of the previous static contact 200, the stacking can be easily removed under the vibration of the static contact conveying line.
[0068] Optionally, in this embodiment, the anti-stacked material slope 220 is an arc-shaped slope to match the shape of the end of the static contact 200 provided with the static contact 210. In other embodiments, the shape of the anti-stacked material slope 220 can also be set to other shapes, such as a square slope, etc., according to actual needs, and this application does not make specific limitations.
[0069] This embodiment further provides a contactor, comprising a contactor body and the above-mentioned auxiliary contact, wherein the auxiliary contact is laterally hung on the contactor body.
[0070] Since the contactor adopts the auxiliary contact mentioned above, the risk of current failure is low and the working reliability is high.
[0071] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. Auxiliary contact, characterized in that, include: Housing (100); A stationary contact (200) is arranged in the housing (100), the stationary contact (200) is provided with a stationary contact point (210), a contact surface of the stationary contact point (210) is provided with a plurality of first stripes (211) arranged at intervals, and a first material receiving groove (212) is formed between two adjacent first stripes (211); A contact support (300) is slidably assembled in the housing (100), an installation space (310) is provided on the contact support (300), and an oblique guide rib (311) is provided on a side wall of the installation space (310); A moving contact bridge (400) is arranged in the installation space (310) and is slidably connected to the oblique guide rib (311); a moving contact (410) corresponding to the static contact (210) is arranged on the moving contact bridge (400); a plurality of second stripes (411) arranged at intervals are arranged on the contact surface of the moving contact (410); a second material receiving groove (412) is formed between two adjacent second stripes (411); An elastic member (500), one end of which is connected to the inner wall of the installation space (310), and the other end of which is connected to the moving contact bridge (400); During the process of the moving contact (410) contacting and separating from the static contact (210), the moving contact (410) slides relative to the static contact (210) under the guidance of the oblique guide rib (311), so as to scrape impurities on the moving contact (410) and the static contact (210) into the first material receiving groove (212) or the second material receiving groove (412).
2. The auxiliary contact according to claim 1, characterized in that: The first material receiving trough (212) is perpendicular to the second material receiving trough (412).
3. The auxiliary contact according to claim 1, characterized in that: The width of the first material receiving groove (212) is 0.5 mm-0.6 mm; and / or the width of the second material receiving groove (412) is 0.5 mm-0.6 mm.
4. The auxiliary contact according to claim 1, characterized in that: The included angle between the oblique guide rib (311) and the movement direction of the contact support (300) is 11°-13°.
5. The auxiliary contact according to claim 1, characterized in that: Two clamping arms (420) arranged opposite to each other are provided on one side of the middle of the moving contact bridge (400), and the two clamping arms (420) surround a clamping groove (421), and the clamping groove (421) is slidably clamped to the oblique guide rib (311).
6. The auxiliary contact according to claim 5, characterized in that: The oblique guide ribs (311) are provided on opposite side walls of the installation space (310), and the clamping grooves (421) are provided on opposite sides of the middle part of the moving contact bridge (400), and the clamping grooves (421) are arranged in a one-to-one correspondence with the oblique guide ribs (311).
7. The auxiliary contact according to claim 1, characterized in that: At least two moving contacts (410) are provided on one side of the moving contact bridge (400), and at least two moving contacts (410) can both contact the corresponding stationary contacts (210) at the same time.
8. The auxiliary contact according to any one of claims 1 to 7, characterized in that: An anti-stack-up slope (220) is provided at one end of the stationary contact (200) away from the stationary contact point (210), and the anti-stack-up slope (220) is used to prevent two adjacent stationary contacts (200) on a stationary contact conveying line from stacking.
9. The auxiliary contact according to any one of claims 1 to 7, characterized in that: The housing (100) has a limit arm (110) extending in the direction of the stationary contact (200), and the stationary contact (200) is provided with a limit protrusion (230), and the side surface of the limit protrusion (230) abuts against the side surface of the limit arm (110) to limit the displacement of the stationary contact (200) in the horizontal direction.
10. A contactor, characterized in that The invention comprises a contactor body and the auxiliary contact according to any one of claims 1 to 9, wherein the auxiliary contact is laterally hung on the contactor body.