Pointed-end-type contact assembly for thermal relay
By designing pointed contact components, the special structure of the moving contact plate and the moving contacts is solved, and the problem of unstable connection of the contact components for thermal relays is achieved under high heat conditions, achieving a more secure and stable contact connection.
Patent Information
- Application Number
- CN202421726407.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The existing contact assembly for thermal relays can easily cause deformation and impact at the connection between the movable contact plate and the movable contacts under high heat conditions, the movable contacts are prone to fall off, and the movable contact plate is unstable swing, affecting the contact quality.
A pointed contact assembly is designed. The moving contact plate includes a circular arc portion, a mounting portion, a transition portion and a bearing portion of the moving contact plate. The moving contact has a silver-plated layer and a directional bump. The riveted boss and a clamped projection structure are used to enhance connection stability.
By riveting the boss and the clamping protrusion structure, the moving contacts prevent falling off, and the moving contacts are more securely connected to the moving contacts; the movable touch plate positioning notches and limiting grooves make the movable touch plate swing and positioning accurately, and the movement is more stable and reliable.
Smart Images
Figure CN222896660U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of contacts for thermal relays, in particular to a pointed contact assembly for thermal relays. Background Art
[0002] Thermal relay is an important electrical protection device, mainly used for overload protection of motors or other electrical equipment. There are moving contacts and static contacts in the thermal relay. The circuit can be switched and protected by swinging the moving contact. The existing contact assembly for thermal relays includes a moving contact plate and moving contacts riveted at both ends of the moving contact plate. In actual use, it is found that there are still the following problems: 1. Due to frequent high-temperature contact between the moving contact and the static contact, the connection between the moving contact plate and the moving contact is deformed and impacted, causing the moving contact to easily fall off the moving contact plate, affecting the normal use of the contact; 2. The swinging action of the moving contact plate is not smooth, and the wire is easy to shake, resulting in poor contact. In view of this, the existing contact assembly for thermal relays is improved and optimized. Utility Model Content
[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a pointed contact assembly for a thermal relay.
[0004] The technical solution adopted by the pointed contact assembly for thermal relay of the utility model: comprises a moving touch plate and a moving contact riveted on the moving touch plate, characterized in that the moving touch plate comprises a moving touch plate arc portion, the left and right ends of the moving touch plate arc portion are bent outwards to sequentially form a moving touch plate mounting portion, a moving touch plate transition portion and a moving touch plate receiving portion, a moving touch plate riveting boss is provided on the moving touch plate receiving portion, an arc positioning groove for docking with a toggle block is provided in the moving touch plate arc portion, the moving contact comprises a contact welding portion, a contact riveting portion with an outer diameter smaller than the outer diameter of the contact welding portion and a silver-plated layer welded on the contact welding portion, and a moving touch plate riveting boss is provided in the moving touch plate riveting boss for the The bottom surface of the contact welding part is supported by a rivet boss receiving groove, and a rivet hole of a moving touch plate riveted to the contact riveting part is arranged in the rivet boss receiving groove, the bottom of the silver-plated layer is higher than the upper surface of the rivet boss of the moving touch plate, the outer wall of the contact welding part is provided with a contact limiting groove, the inner wall of the rivet boss receiving groove is provided with a rivet boss clamping protrusion clamped with the contact limiting groove, the contact riveting part is provided with contact directional protrusions at intervals around a circular arc near the contact welding part, and the rivet boss receiving groove is provided with a rivet boss directional recess corresponding to the contact directional protrusion.
[0005] The front and rear ends of the movable touch plate mounting portion are provided with movable touch plate positioning recesses for positioning the movable touch plate in the thermal relay housing, and the middle part of the movable touch plate mounting portion is provided with a second movable touch plate limiting groove which is arranged horizontally and used for swinging the toggle block.
[0006] The bottom surface of the contact welding portion is provided with a contact reinforcement pattern, and the height of the contact reinforcement pattern is 0.2 mm.
[0007] The silver-plated layer is a cone-shaped structure.
[0008] The number of the contact directional bumps is 2.
[0009] The depth of the contact limiting groove is 0.3 mm, and the height of the riveting boss clamping protrusion is 0.2 mm.
[0010] The advantages of the pointed contact assembly for the thermal relay of the utility model are as follows: the structure of the riveting boss of the moving contact plate can prevent the moving contact from shaking when it is impacted through the contact directional protrusion after riveting, and the clamping protrusion of the riveting boss can prevent the moving contact from falling off, so that the connection between the moving contact plate and the moving contact is more firmly and tightly; the positioning recess of the moving contact plate and the second limiting recess of the moving contact plate can accurately position the moving contact plate when it swings, and the movement is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0012] Figure 1 It is an exploded view of the pointed contact assembly for the thermal relay of the utility model;
[0013] Figure 2 This is a structural schematic diagram of the dynamic touch panel of the utility model;
[0014] Figure 3 This is a front structural diagram of the movable contact of the utility model;
[0015] Figure 4 This is another structural schematic diagram of the movable touch panel of the utility model;
[0016] Figure 5 It is a schematic diagram of the back structure of the movable contact of the utility model. DETAILED DESCRIPTION
[0017] like Figure 1-5As shown, the utility model relates to a pointed contact assembly for a thermal relay, comprising a moving touch plate 1 and a moving contact 2 riveted on the moving touch plate 1, the moving touch plate 1 comprising a moving touch plate arc portion 5, the left and right ends of the moving touch plate arc portion 5 are bent outwards to sequentially form a moving touch plate mounting portion 6, a moving touch plate transition portion 7 and a moving touch plate receiving portion 8, the moving touch plate receiving portion 8 is provided with a moving touch plate riveting boss 9, the moving touch plate arc portion 5 is provided with an arc positioning groove 10 that is docked with the toggle block, the moving contact 2 comprises a contact welding portion 11, a contact riveting portion 12 having an outer diameter smaller than the outer diameter of the contact welding portion 11, and a silver-plated layer 13 welded on the contact welding portion 11, the moving touch plate riveting boss 9 is provided with a riveting boss receiving groove 15 for receiving the bottom surface of the contact welding portion 11, the riveting boss receiving groove 15 is provided with a riveting boss receiving groove 15 that is connected to the The contact riveting part 12 is riveted to the riveting hole 16 of the moving contact plate, the bottom of the silver-plated layer 13 is higher than the upper surface of the riveting boss 9 of the moving contact plate, the outer wall of the contact welding part 11 is provided with a contact limiting groove 18, and the inner wall of the riveting boss receiving groove 15 is provided with a riveting boss clamping protrusion 19 clamped with the contact limiting groove 18, the contact riveting part 12 is provided with contact directional protrusions 21 around the arc interval near the contact welding part 11, and the riveting boss receiving groove 15 is provided with a rivet boss directional recess 22 corresponding to the contact directional protrusion 21. The structure of the riveting boss 9 of the moving touch plate can prevent the moving contact 2 from shaking when it is impacted through the contact directional protrusion 21 after riveting, and the riveting boss clamping protrusion 19 can prevent the moving contact 2 from falling off, so that the connection between the moving touch plate 1 and the moving contact 2 is more firmly and tightly, more stable and reliable.
[0018] The front and rear ends of the movable touch plate mounting portion 6 are provided with movable touch plate positioning recesses 24 for positioning the movable touch plate 1 installed in the thermal relay housing, and the middle part of the movable touch plate mounting portion 6 is provided with a movable touch plate second limiting groove 25 which is arranged horizontally and used for limiting the swing of the toggle block, so that the movable touch plate is accurately positioned when swinging, and the movement is more stable and reliable.
[0019] The bottom surface of the contact welding portion 11 is provided with a contact reinforcement pattern 27 , and the height of the contact reinforcement pattern 27 is 0.2 mm, so as to further enhance the contact strength between the moving contact 2 and the moving contact plate 1 .
[0020] The silver-plated layer 13 has a conical structure, which makes the contact with the static contact more reliable.
[0021] The number of the contact directional protrusions 21 is two, which are symmetrically arranged to ensure more balanced force.
[0022] The depth of the contact limiting groove 18 is 0.3 mm, and the height of the riveting boss clamping protrusion 19 is 0.2 mm. If the size is too large, it is easy to cause damage to the moving contact during riveting, and if the size is too small, it is difficult to play a limiting role.
[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.
Claims
1. A pointed contact assembly for a thermal relay, comprising a moving contact plate (1) and a moving contact (2) riveted to the moving contact plate (1), characterized in that: The movable touch plate (1) comprises a movable touch plate arc portion (5), the left and right ends of the movable touch plate arc portion (5) are bent outwards to form a movable touch plate mounting portion (6), a movable touch plate transition portion (7) and a movable touch plate receiving portion (8) in sequence, the movable touch plate receiving portion (8) is provided with a movable touch plate riveting boss (9), the movable touch plate arc portion (5) is provided with an arc positioning groove (10) for docking with a toggle block, the movable contact (2) comprises a contact welding portion (11), a contact riveting portion (12) having an outer diameter smaller than the outer diameter of the contact welding portion (11) and a silver-plated layer (13) welded on the contact welding portion (11), the movable touch plate riveting boss (9) is provided with a riveting boss for receiving the bottom surface of the contact welding portion (11) A receiving groove (15), a moving contact plate rivet hole (16) riveted to the contact rivet portion (12) is provided in the rivet boss receiving groove (15), the bottom of the silver-plated layer (13) is higher than the upper surface of the moving contact plate rivet boss (9), a contact limiting groove (18) is provided on the outer wall of the contact welding portion (11), a rivet boss clamping protrusion (19) clamped to the contact limiting groove (18) is provided on the inner wall of the rivet boss receiving groove (15), contact directional protrusions (21) are provided at intervals around an arc at the contact rivet portion (12) near the contact welding portion (11), and a rivet boss directional recess (22) corresponding to the contact directional protrusion (21) is provided on the rivet boss receiving groove (15).
2. The pointed contact assembly for a thermal relay according to claim 1, characterized in that: The front and rear ends of the movable touch plate mounting portion (6) are provided with movable touch plate positioning recesses (24) for positioning the movable touch plate (1) when mounted in the thermal relay housing, and the middle portion of the movable touch plate mounting portion (6) is provided with a movable touch plate second limiting groove (25) which is arranged transversely and is used for limiting the swing of the toggle block.
3. The pointed contact assembly for a thermal relay according to claim 1, characterized in that: The bottom surface of the contact welding portion (11) is provided with a contact reinforcement pattern (27), and the height of the contact reinforcement pattern (27) is 0.2 mm.
4. The pointed contact assembly for a thermal relay according to claim 1, characterized in that: The silver-plated layer (13) is a cone-shaped structure.
5. The pointed contact assembly for a thermal relay according to claim 1, characterized in that: The number of the contact orientation protrusions (21) is 2.
6. The pointed contact assembly for a thermal relay according to claim 1, characterized in that: The depth of the contact limiting groove (18) is 0.3 mm, and the height of the riveting boss clamping protrusion (19) is 0.2 mm.