Heavy-current relay
By designing the linkage structure of the active reed and auxiliary reed in a high current relay, combining arc-shaped bending connection and thread fixation, the problem of excessive relay height is solved, and the relay is miniaturized and the reliability of the super-stroke contact is achieved. .
Patent Information
- Application Number
- CN202420373847.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing relays with auxiliary contacts are arranged axially spaced along the push rod, resulting in a high relay height. In order to ensure insulation, the distance between the two cannot be too close, resulting in a further increase in the relay height. There is a problem of unreasonable contact layout.
Design a high current relay, the active reed is arranged at the end of the push rod, and the auxiliary reed is fixed in the second support to extend to the active reed side, and the elasticity is increased by using the arc-shaped curved connection part, and the active reed and auxiliary spring are added. The plate linkage enables fixing and installation through threaded connections and limiting structures, reducing parts and space occupation.
A reasonable layout between the active contacts and auxiliary contacts is realized, reducing the space occupied by the auxiliary reed in the axial and Z-axis directions of the push rod, simplifying installation, reducing the height of the relay, which is conducive to the small size of the relay and ensure the reliability of ultra-trip contact.
Smart Images
Figure CN222190589U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switch electrical appliances, in particular to a high-current relay. Background Art
[0002] In existing relays with auxiliary contacts, the auxiliary moving contact is usually set at one end of the push rod, and the auxiliary moving contact and the active contact are arranged at intervals along the axial direction of the push rod, resulting in a high height of the relay. The axial direction of the push rod is the height direction of the relay, which is not conducive to the miniaturization of the relay. For high-current relays, in order to ensure the insulation between the active contact and the auxiliary moving contact, the distance between the two cannot be too close, which further increases the height of the relay. Therefore, the relative position of the auxiliary contact and the main contact should be rearranged. Summary of the invention
[0003] The utility model aims to provide a high-current relay to solve the problem of unreasonable contact layout of the existing relays.
[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: a high-current relay, comprising an active reed, an auxiliary moving reed and a push rod, the active reed being arranged at one end of the push rod, the push rod being configured to move under the drive of the electromagnetic component and drive the active reed and the auxiliary moving reed to move, the push rod being integrally formed with a first support protruding radially along the push rod, an insulating second support being provided at the end of the push rod, the second support being fixedly connected to the push rod, an active reed and an overtravel spring being provided between the first support and the second support, so that the active reed moves under the drive of the push rod and realizes overtravel contact, the auxiliary moving reed being fixedly arranged in the second support and extending toward one side of the active reed, thereby linking the active reed and the auxiliary moving reed.
[0005] In one embodiment, the active spring is provided with a plurality of active contacts arranged at intervals along the radial direction of the push rod, the arrangement direction of the active contacts is defined as the X-axis direction, the radial direction of the push rod perpendicular to the X-axis is defined as the Y-axis direction, and the auxiliary dynamic spring extends from the second support toward one side of the Y-axis direction of the active spring.
[0006] In one embodiment, the second support is made of plastic, and the auxiliary movable spring is injection-molded into the second support to achieve a fixed connection between the two.
[0007] In one embodiment, the auxiliary active spring includes a fixed portion, a contact portion and a connecting portion, the fixed portion is fixedly connected to the second support, the contact portion extends along the Y-axis direction, and the direction of the push rod axially from the middle of the push rod toward the active spring is defined as the positive direction of the Z-axis, and the opposite direction is the negative direction of the Z-axis, and the connecting portion extends from the fixed portion along the negative direction of the Z-axis.
[0008] In one embodiment, the fixing portion and the connecting portion are integrally connected, an end of the connecting portion for connecting to the contact portion is provided with an arc-shaped bending section, and the contact portion is welded and fixed to the end of the arc-shaped bending section.
[0009] In one embodiment, it also includes a base assembly, the auxiliary moving spring is provided with two auxiliary moving contacts arranged at intervals along the X-axis, the base assembly is provided with a main static contact corresponding to the active contact and an auxiliary static contact corresponding to the auxiliary moving contact, the two auxiliary static contacts are electrically connected to the control board respectively, so that the auxiliary moving contact and the auxiliary static contact are attracted to form an electrical connection between the two auxiliary static contacts.
[0010] In one embodiment, a sleeve is provided at the end of the push rod, and the active spring is sleeved outside the sleeve to form a relatively sliding connection with the push rod, and the over-travel contact is achieved by relying on the relatively sliding connection.
[0011] In one embodiment, the second support is provided with a through hole, the end of the push rod is provided with a threaded hole extending along its axial direction, and the second support is threadedly connected to the push rod through a threaded connector, thereby achieving a fixed connection between the push rod and the second support.
[0012] In one embodiment, the second support is provided with a first limiting structure, and the active spring is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to form an installation limit for the second support and the active spring, and the limit for the active spring and the auxiliary active spring is formed with the aid of the installation limit.
[0013] In one embodiment, the second support is provided with a circular through hole, the push rod is passed through the circular through hole, the first limiting structure is a limiting boss arranged on one side of the circular through hole, and the second limiting structure is a limiting groove corresponding to the limiting boss.
[0014] The beneficial effects of the utility model are:
[0015] 1. The auxiliary moving spring is arranged on one side of the active spring in the Y-axis direction, and the active contact is arranged along the X-axis direction to ensure the gap between the active contact and the auxiliary moving spring, thereby reducing the space occupied by the auxiliary moving spring in the axial direction of the push rod, which is conducive to the miniaturization of the relay.
[0016] 2. The auxiliary moving spring extends along the negative direction of the Z axis relative to the active spring, and the active spring is arranged at the end of the push rod, so that the auxiliary moving spring does not occupy the space in the Z axis direction.
[0017] 3. An arc-shaped bending section is provided at the connecting portion, and the contact portion is provided at the end of the arc-shaped bending section. The arc-shaped bending of the connecting portion is utilized to increase the elasticity of the auxiliary moving spring piece, so that the auxiliary moving spring piece can be fully deformed during the overtravel movement to ensure the contact between the auxiliary moving contact and the auxiliary static contact.
[0018] 4. The first support and the push rod are integrally formed, and the second support is fixed to the end of the push rod by threaded connection, so as to realize the connection between the active reed and the push rod, and then the auxiliary moving reed is fixedly connected to the second support, so that fewer parts are used to install the active reed and the auxiliary moving reed, which simplifies the installation of the active reed and the auxiliary moving reed. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a stereogram of an embodiment of the utility model.
[0020] Figure 2 It is the front view of the embodiment of the utility model.
[0021] Figure 3 It is a right side view of an embodiment of the utility model.
[0022] Figure 4 It is a bottom view of an embodiment of the utility model.
[0023] Figure 5 It is a front view of the embodiment of the utility model without the base assembly.
[0024] Figure 6 It is a right side view of the embodiment of the utility model without the base assembly.
[0025] Figure 7 yes Figure 4 AA section view.
[0026] Figure 8 yes Figure 4 BB cross-sectional view.
[0027] Fig. 9 It is a structural diagram of the auxiliary movable spring and the second support in an embodiment of the utility model.
[0028] Wherein: 1 base assembly, 11 control board, 2 electromagnetic assembly, 21 coil frame, 22 coil, 23 static iron core, 24 moving iron core, 25 reset spring, 3 push rod, 31 first support, 4 active spring, 41 active contact, 42 main static contact, 5 auxiliary moving spring, 51 auxiliary moving contact, 52 auxiliary static contact, 53 fixing part, 54 contact part, 541 fork part, 55 connecting part, 551 arc-shaped bending section, 6 second support, 61 through hole, 7 overtravel spring, 8 sleeve, 9 threaded connector. DETAILED DESCRIPTION
[0029] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0030] See also Figures 1 to 9 As shown, the utility model discloses a high current relay, comprising a base assembly 1, an electromagnetic assembly 2 and a push rod 3 arranged in the electromagnetic assembly 2 and extending outside the electromagnetic assembly 2, the part of the push rod 3 protruding outside the electromagnetic assembly 2 is connected with an active spring 4 and an auxiliary moving spring 5, the active spring 4 is arranged at the end of the push rod 3, and the push rod 3 is configured to move under the drive of the electromagnetic assembly 2 and drive the active spring 4 and the auxiliary moving spring 5 to move. More specifically: the electromagnetic assembly 2 comprises a coil frame 21 and a coil 22 wound on the coil frame 21, a static iron core 23 and a moving iron core 24 are arranged in the coil 22, a reset spring 25 is arranged between the static iron core 23 and the moving iron core 24, the moving iron core 24 and the static iron core 23 are attracted or disconnected under the action of the energized coil and the reset spring 25, and the push rod 3 is fixedly connected to the moving iron core 24, and moves along its axial direction with the movement of the moving iron core 24.
[0031] See also Figures 5 to 8 As shown, the push rod 3 is integrally formed with a first support 31 protruding radially along the push rod 3, an insulating second support 6 is provided at the end of the push rod 3, the second support 6 is fixedly connected to the push rod 3, an active spring 4 and an overtravel spring 7 are provided between the first support 31 and the second support 6, so that the active spring 4 moves and realizes overtravel contact under the drive of the push rod 3, and the auxiliary moving spring 5 is fixedly arranged in the second support 6 and extends to one side of the active spring 4, so that the active spring 4 and the auxiliary moving spring 5 are linked.
[0032] The active spring 4 is provided with a plurality of active contacts 41 arranged at intervals along the radial direction of the push rod 3. The arrangement direction of the active contacts 41 is defined as the X-axis direction, and the direction perpendicular to the X-axis in the radial direction of the push rod 3 is defined as the Y-axis direction. The auxiliary moving spring 5 extends from the second support 6 to one side of the Y-axis direction of the active spring 4. The auxiliary moving spring 5 is provided with two auxiliary moving contacts 51 arranged at intervals along the X-axis. The base assembly 1 is provided with a main static contact 42 corresponding to the active contact 41 and an auxiliary static contact 52 corresponding to the auxiliary moving contact 51. The electrical gap between the active contact 41 and the auxiliary moving contact 51 is ensured by the staggered setting of the active spring 4 and the auxiliary moving spring 5, and the insulation and creepage distance between the active contact 41 and the auxiliary moving contact 51 are ensured by the insulating second support 6. The two auxiliary static contacts 52 are electrically connected to the control board 11 respectively, so that the auxiliary moving contact 51 and the auxiliary static contact 52 are attracted to form an electrical connection between the two auxiliary static contacts 52. The active contact 41 and the main static contact 42 form a main contact group, and the auxiliary moving contact 51 and the auxiliary static contact 52 form an auxiliary contact group. The auxiliary contact group in this example is used to detect the on-off of the main contact group. In other embodiments, the auxiliary contact group can also be used to switch the on-off power of the coil.
[0033] The second support 6 is made of plastic, so that the second support 6 forms an insulating part. The auxiliary movable spring 5 is injection-molded in the second support 6 to achieve a fixed connection between the two. The auxiliary movable spring 5 is fixed in the second support 6 by means of the injection molding process of the second support 6. The process is simple and the fixation is reliable.
[0034] See also Figure 5 , Figure 6 and Fig. 9 As shown, the auxiliary moving spring piece 5 includes a fixing portion 53, a contact portion 54 and a connecting portion 55. The fixing portion 53 is fixedly connected to the second support 6, and the contact portion 54 extends in the Y-axis direction. The direction of the push rod 3 from the middle of the push rod 3 toward the active spring piece 4 in the axial direction is defined as the positive direction of the Z-axis, and the opposite direction is the negative direction of the Z-axis. The connecting portion 55 extends from the fixing portion 53 along the negative direction of the Z-axis. The contact portion 54 is a U-shaped structure with two forks 541, and each fork 541 is fixedly provided with an auxiliary moving contact 51, so that the auxiliary contact group is located in the negative direction of the Y-axis relative to the main contact group, and the auxiliary moving spring piece 5 will not occupy the space of the push rod in the positive direction of the Z-axis, which is conducive to reducing the height of the relay, thereby realizing the miniaturization of the relay.
[0035] In order to achieve overtravel contact of the auxiliary contact group and ensure the toughness of the auxiliary moving spring during the overtravel contact process, the fixing portion 53 and the connecting portion 55 are integrally connected, and the end of the connecting portion 55 for connecting the contact portion 54 is provided with an arc-shaped curved section 551, and the contact portion 54 is welded and fixed to the end of the arc-shaped curved section 551. The arc-shaped bending of the connecting portion 55 is used to increase the elasticity of the auxiliary moving spring 5, so that the auxiliary moving spring 5 can be fully deformed during the overtravel movement to ensure the contact between the auxiliary moving contact 51 and the auxiliary static contact 52.
[0036] See also Figure 8 As shown, a sleeve 8 is provided at the end of the push rod 3, and the active spring 4 is sleeved outside the sleeve 8, thereby forming a relative sliding connection relationship with the push rod 3, and relying on this relative sliding connection relationship to achieve overtravel contact. When the push rod 3 moves in the positive direction of the Z axis, it drives the active spring 4 to move in the same direction until the active contact 41 and the main static contact 42 are closed, and the push rod 3 continues to move to compress the overtravel spring 7 to achieve overtravel contact of the main contact group. When the main contact group is closed and achieves overtravel contact, the auxiliary contact group is closed and overtravel contact is achieved synchronously.
[0037] The second support 6 is provided with a through hole 61, and the end of the push rod 3 is provided with a threaded hole extending along its axial direction. The second support 6 is threadedly connected to the push rod 3 through a threaded connector 9, thereby realizing a fixed connection between the push rod 3 and the second support. The threaded connection is simple and reliable, so that the second support 6 can be reliably fixed to the end of the push rod 3, and then the active spring 4 is pressed on the second support 6 through the cooperation of the first support 31 and the overtravel spring 7, thereby realizing the connection of the active spring 4, and then the auxiliary dynamic spring 5 is injection-molded in the second support 6, thereby realizing the installation of the active spring 4 and the auxiliary dynamic spring 5 with fewer parts.
[0038] Since the structure of the auxiliary movable spring 5 is relatively complex, the distance between the auxiliary movable contact 51 and the fixed part 53 is relatively far, while the structure of the active spring 4 is relatively simple, it is easier to form the alignment of the active contact 41 and the main static contact 42. In order to ensure that the two auxiliary movable contacts 51 can align with the auxiliary static contact 52 to form reliable contact, the auxiliary movable spring 5 is positioned with the help of the active spring 4, the second support 6 is provided with a first limiting structure, and the active spring 4 is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to form an installation limit of the second support 6 and the active spring 4, so that the active spring 4 and the auxiliary movable spring 5 are limited by the installation limit, so as to avoid deflection during the assembly process and cause the auxiliary movable contact 51 to be misaligned with the auxiliary static contact 52.
[0039] See also Fig. 9As shown, in this example, the through hole 61 on the second support 6 is circular, and the push rod 3 is inserted into the circular through hole 61. Therefore, during the assembly process, the second support 6 and the push rod 3 are insufficiently limited in the radial direction of the through hole 61, and the second support 6 may be deflected relative to the active spring 4. Therefore, the first limiting structure is a limiting boss arranged on one side of the circular through hole 61, and the second limiting structure is a limiting groove corresponding to the limiting boss. Increasing the radial limiting of the circular through hole 61 can overcome the assembly deflection. In other embodiments, the installation limiting of the second support 6 and the active spring 4 can also be achieved by changing the through hole to a non-circular shape.
[0040] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.
Claims
1. A high current relay, comprising an active reed, an auxiliary moving reed and a push rod, wherein the active reed is arranged at one end of the push rod, and the push rod is configured to move under the drive of an electromagnetic component and drive the active reed and the auxiliary moving reed to move, characterized in that: The push rod is integrally formed with a first support that protrudes radially along the push rod, an insulating second support is provided at the end of the push rod, the second support is fixedly connected to the push rod, an active reed and an overtravel spring are provided between the first support and the second support, so that the active reed moves and achieves overtravel contact under the drive of the push rod, and the auxiliary moving reed is fixedly arranged in the second support and extends to one side of the active reed, so that the active reed and the auxiliary moving reed are linked.
2. A high current relay according to claim 1, characterized in that: The active spring is provided with a plurality of active contacts arranged at intervals along the radial direction of the push rod, the arrangement direction of the active contacts is defined as the X-axis direction, the radial direction of the push rod perpendicular to the X-axis is defined as the Y-axis direction, and the auxiliary active spring extends from the second support toward one side of the Y-axis direction of the active spring.
3. A high current relay according to claim 2, characterized in that: The second support is made of plastic, and the auxiliary movable spring is injection-molded in the second support to achieve a fixed connection between the two.
4. A high current relay according to claim 3, characterized in that: The auxiliary moving spring includes a fixed portion, a contact portion and a connecting portion, the fixed portion is fixedly connected to the second support, the contact portion extends along the Y-axis direction, and the direction of the push rod axially from the middle of the push rod toward the active spring is defined as the positive direction of the Z-axis, and the opposite direction is the negative direction of the Z-axis, and the connecting portion extends from the fixed portion along the negative direction of the Z-axis.
5. A high current relay according to claim 4, characterized in that: The fixing portion and the connecting portion are connected integrally, an end of the connecting portion used for connecting the contact portion is provided with an arc-shaped bending section, and the contact portion is welded and fixed to the end of the arc-shaped bending section.
6. A high current relay according to claim 2, characterized in that: It also includes a base assembly, the auxiliary moving spring is provided with two auxiliary moving contacts arranged at intervals along the X-axis, the base assembly is provided with a main static contact corresponding to the active contact and an auxiliary static contact corresponding to the auxiliary moving contact, the two auxiliary static contacts are electrically connected to the control board respectively, so that the auxiliary moving contact and the auxiliary static contact are attracted to form an electrical connection between the two auxiliary static contacts.
7. A high current relay according to claim 1, characterized in that: A sleeve is provided at the end of the push rod, and the active spring is sleeved outside the sleeve, thereby forming a relatively sliding connection relationship with the push rod, and over-travel contact is achieved by relying on the relatively sliding connection relationship.
8. A high current relay according to claim 7, characterized in that: The second support is provided with a through hole, the end of the push rod is provided with a threaded hole extending along its axial direction, and the second support is threadedly connected to the push rod through a threaded connector, thereby achieving a fixed connection between the push rod and the second support.
9. A high current relay according to claim 1, characterized in that: The second support is provided with a first limiting structure, and the active spring is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to form an installation limit for the second support and the active spring, and the limit for the active spring and the auxiliary active spring is formed with the help of the installation limit.
10. A high current relay according to claim 9, characterized in that: The second support is provided with a circular through hole, the push rod is passed through the circular through hole, the first limiting structure is a limiting boss arranged on one side of the circular through hole, and the second limiting structure is a limiting groove corresponding to the limiting boss.