Bistable auxiliary contact assembly and contactor

Abstract

The invention discloses a bistable auxiliary contact assembly, which performs self-holding of two states of static closing and dynamic closing through self tension, and does not need a mechanism provided by a contactor and used for pushing the state switching of an auxiliary contact to act on the assembly. The assembly is configured to comprise an assembling part used for providing assembling support, and a first assembling hole and a second assembling hole are formed in the assembling part; one end of the pushing sheet is rotatably assembled in the first assembling hole; one end of the movable contact spring is rotatably assembled in the second assembly hole, and a movable contact is formed at the other end of the movable contact spring; and the tension spring is assembled between the pushing sheet and the movable contact spring and generates tension after the pushing sheet rotates by a certain angle, so that the movable contact spring is kept in a static closing state or a dynamic closing state. The auxiliary contact assembly solves the problem that the service life of a contactor is affected by deformation and fracture of a common contactor auxiliary contact assembly due to fatigue of a movable contact spring. And the environmental performance such as vibration of the contactor is improved.

Description

Technical Field

[0001] The invention belongs to the field of electromechanics, and in particular relates to a bistable auxiliary contact assembly and a contactor. Background Art

[0002] In the contactor, the auxiliary contact assembly structure is generally composed of a moving spring and a static spring. In the static state, the plastic deformation caused by the bending of the moving spring provides the contact pressure of the component part in the static state. In the dynamic state, the moving spring of the contact assembly is pushed up by the push rod and other mechanisms that match the auxiliary contact assembly during use, thereby realizing the disconnection of static closing and the connection of dynamic closing.

[0003] This type of auxiliary contact assembly can effectively realize the conversion between dynamic and static closing states, but the structure of this type of auxiliary contact assembly has the problem that the dynamic spring part is prone to fatigue deformation and fracture during use, which greatly affects the life and reliability of the contactor. At the same time, this type of spring assembly requires the push rod matching the contactor and the auxiliary contact assembly to continuously contact the dynamic spring and provide holding force in the dynamic closing state, but in an environment such as vibration, the push rod of the contactor will experience mechanical jitter, affecting the contact reliability of the contact. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a bistable auxiliary contact assembly, which can solve the problem that the movable spring part of the conventional contactor auxiliary contact assembly is prone to fatigue deformation and breakage, and at the same time can achieve self-maintenance (bistable) of both statically closed and dynamically closed states, and effectively solve the problem of contact reliability caused by mechanical jitter of the push rod.

[0005] To achieve the purpose of the present invention, the bistable auxiliary contact assembly provided herein is self-maintained in two states, static closing and dynamic closing, by its own tension, without the need for a mechanism provided by the contactor to push the auxiliary contact state switching to act on the assembly; the assembly is configured to include:

[0006] An assembly part, used for providing assembly support, on which a first assembly hole and a second assembly hole are formed;

[0007] A push piece, one end of which can be rotatably assembled in the first assembly hole;

[0008] A movable spring piece, one end of which can be rotatably assembled in the second assembly hole, and the other end of which is formed with a movable contact;

[0009] The tension spring is assembled between the pushing piece and the moving spring piece, and generates tension after the pushing piece rotates a certain angle to keep the moving spring piece in a statically closed state or a dynamically closed state.

[0010] The auxiliary contact assembly is equipped with a tension spring which is assembled between the push piece and the moving spring piece. After the push piece rotates a certain angle, the tension spring generates tension as the pulling force of the moving spring piece, so that the moving spring piece maintains a static closed state or a dynamic closed state. The push rod and other mechanisms provided by the contactor for pushing the auxiliary contact state switching do not need to contact the push piece in the auxiliary contact assembly, which effectively solves the problem that the moving spring piece part composed of the push piece and the moving spring piece is prone to fatigue deformation and fracture due to the push rod and other mechanisms for pushing the auxiliary contact state switching acting on the push piece; and effectively solves the problem that the reliable contact of the auxiliary contact is affected by the shaking of the push rod and other mechanisms for pushing the auxiliary contact state switching by the contactor in a vibration environment.

[0011] Another object of the present invention is to provide a contactor, which includes the bistable auxiliary contact assembly provided by the present invention. In a non-excited state, the mechanism provided by the contactor for pushing the auxiliary contact state switching does not contact the pushing piece, the pushing block flips a certain angle so that the spring piece is in a statically closed state, and the tension generated by the tension spring keeps the moving spring piece in the statically closed state; during the excitation action of the contactor, the mechanism of the contactor pushing the auxiliary contact state switching contacts the pushing piece after movement, pushes the pushing piece to flip a certain angle to drive the spring piece to flip in linkage so that the moving spring piece is in a dynamically closed state, and then the mechanism pushing the auxiliary contact state switching does not contact the pushing piece, and the moving spring piece is kept in a dynamically closed state by the tension generated by the tension spring.

[0012] The beneficial effects of the present invention are as follows: the auxiliary contact assembly solves the problem that the auxiliary contact assembly of a common contactor is deformed and broken due to fatigue of a movable spring piece, which affects the life of the contactor; the auxiliary contact assembly can also utilize its own bistable holding performance, which is not affected by the contactor push rod, thereby improving the environmental performance of the contactor, such as vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings herein are incorporated into and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0014] Figure 1 A schematic diagram of the contact assembly structure described in the patent of the present invention;

[0015] Figure 2 An exploded schematic diagram of the contact assembly structure provided by the present invention;

[0016] Figure 3 A schematic diagram of the assembly structure of an assembly part, a push piece, a movable spring piece and a tension spring in a contact assembly provided by the present invention;

[0017] Figure 4 A schematic diagram of the structure of a movable spring in a contact assembly provided by the present invention;

[0018] Figure 5 It is a partial schematic diagram of the first static reed piece recorded in the present invention;

[0019] Figure 6 It is a partial schematic diagram of the second static reed piece recorded in the present invention;

[0020] Figure 7 It is a schematic diagram of the auxiliary contact assembly recorded in the present invention in a statically closed state;

[0021] Figure 8 It is a schematic diagram of the auxiliary contact assembly recorded in the present invention in the closed state. DETAILED DESCRIPTION

[0022] The technical solution claimed for protection by the patent of the present invention is further described in detail here with reference to the accompanying drawings and specific implementation methods.

[0023] Reference Figure 1-3 The bistable auxiliary contact assembly provided by the present invention at least comprises:

[0024] An assembly part 1, used for providing assembly support, and having a first assembly hole and a second assembly hole formed thereon;

[0025] The push piece 2 has one end that can be rotatably assembled in the first assembly hole, so that the push piece 2 can rotate under the action of external force;

[0026] The movable spring piece 3 has one end which can be rotatably assembled in the second assembly hole, and a movable contact 31 is formed on the other end;

[0027] The tension spring 4 is assembled between the push piece 2 and the movable spring piece 3. After the push piece 2 rotates a certain angle, tension is generated to keep the movable spring piece 3 in a static closed state or a dynamic closed state.

[0028] Reference Figure 7 , 8 The auxiliary contact assembly push piece 2 rotates under the action of external force and is fixed after forming a certain angle. The tension spring 4 generates tension under the action of the push piece 2 to act on the moving spring piece 3 to make the moving spring piece in a dynamic or static state. The push block 2 can be fixed by using a toothed contact structure between it and the first assembly hole to achieve fixation.

[0029] Reference Figure 1-8 The contact assembly further comprises a first static spring part 5 and a second static spring part 6 for forming a static closed state and a dynamic closed state with the dynamic spring 3. The first and second spring parts respectively comprise an assembly section and a contact section, and static contacts 51 and 61 are formed on the contact sections.

[0030] The assembly structure of the assembly part 1, the push piece 2, the moving spring 3, the tension spring 4, the first static spring part 5, and the second static spring part 6 is as shown in Figure 1 , 2 The contact assembly also includes a first insulating mounting seat 7 and a second insulating mounting seat 8. The assembly part 1, the push piece 2, the moving spring piece 3, the tension spring 4, the first static spring piece part 5, and the second static spring piece part 6 are connected to the first insulating mounting seat 7 and the second insulating mounting seat 8 in a snap-fit ​​manner, and a snap-fit ​​groove and a snap-fit ​​platform are formed respectively. The inner walls of the first insulating mounting seat 7 and the second insulating mounting seat 8 are formed with a positioning platform for positioning the push piece. Figure 1 After the structure shown is assembled, the push piece can contact the positioning platform and can change the contact positioning platform under the action of external force. The positioning platform realizes the positioning of the push piece 2, keeping it at a certain angle, and the tension spring generates tension, such as Figure 7 , 8 shown.

[0031] The first insulating mounting seat 7 and the second insulating mounting seat 8 are fixedly assembled by means of fixing members 9 such as bolts, pins, screws, rivets, etc.

[0032] During use, the component structure can realize the bistable self-maintenance of the contact under the action of the tension of the tension spring, that is, Figure 7 In the state shown, the contact assembly realizes the function of statically closed contact through the static spring piece and the first static spring piece part; and realizes the function of dynamically closed contact of the contact assembly through the second static spring piece part and the dynamic spring piece. Figure 8 As shown; the dynamic closing and static closing functions of the contact assembly are switched in linkage through mechanical pushing of the push piece and the tension spring.

[0033] The moving spring, the pusher and the assembly adopt an arc structure, that is, the ends of the moving spring and the pusher are arc-shaped, and the assembly is provided with an arc groove moving spring to reduce the friction resistance of the moving spring during the flipping process. The moving spring part of the auxiliary contact assembly structure is composed of a moving spring with a moving contact, a pusher and a tension spring. This structure (attached Figure 3 The movable spring piece of the structure shown in the figure does not have any bending or the like. During the use of the contact assembly structure, the mechanical life span is better, and the problems of spring loss and fatigue fracture that usually occur in the traditional method of using elastic materials to make movable spring pieces are solved.

[0034] The flip angles of the moving spring in the static and dynamic closing states of the auxiliary contact assembly structure are symmetrical structures, such as Figure 7 and Figure 8The flip angle A shown is generally between 30 and 60 degrees. If the angle is too large, the travel requirement of the contactor matched with it during use will be relatively large; if the angle is too small, it will not be conducive to ensuring the pressure of the contacts. In order to ensure that the flip angle is equal, the center of the arc of the matching position of the moving spring, the pusher and the assembly should be placed on the middle straight line of the gap between the two static contacts. In order to reduce the external volume of the assembly, the moving spring and the pusher of the contact are designed as a laborious lever structure relative to the rotating assembly, thus achieving the effect of maximizing the contact gap of the contact assembly under a better volume space.

[0035] The auxiliary contact assembly structure can be used in a contactor as an auxiliary contact part, and the contactor push rod and other mechanisms matched therewith only need to provide a pulse conversion force to switch the state of the contact assembly. That is, when the auxiliary contact assembly is applied to the contactor as an auxiliary contact part, in the non-excitation state, the push rod and other mechanisms provided by the contactor to push the auxiliary contact state switching do not need to contact the push piece of the auxiliary contact assembly, and the tension generated by the tension spring of the structure of the present invention itself remains in a statically closed state; during the process of the contactor excitation action, the push rod and other mechanisms of the contactor move and contact the push piece of the auxiliary contact assembly, and push the push piece to move, driving the dynamic spring part to flip in linkage, and after the dynamic spring part flips, the push piece is locked, and the tension of the tension spring keeps the contact structure in a dynamic closed state. After the contactor is actuated, the push rod of the contactor and the push piece of the structure of the present invention do not need to contact; the stress on the push rod of the contactor during the environmental test of vibration and the like will not be transmitted to the auxiliary contact part, solving the problem that the contact reliability of the auxiliary contact is affected by the shaking of the push rod and other mechanisms of the contactor during the environmental test of vibration and the like.

[0036] The above embodiments are only used to illustrate the technical solution of the patent of the present invention rather than to limit it. Any modification or equivalent substitution made to the technical solution of the patent of the present invention by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the patent of the present invention.

Claims

1. A bistable auxiliary contact assembly, characterized in that: The component is self-maintained in both static and dynamic states by its own tension, and does not require the mechanism provided by the contactor to push the auxiliary contact state switching to act on the component; the component is configured to include: An assembly part, used for providing assembly support, on which a first assembly hole and a second assembly hole are formed; A push piece, one end of which can be rotatably assembled in the first assembly hole; The movable spring piece has one end that can be rotatably assembled in the second assembly hole, and a movable contact is formed on the other end; the tension spring is assembled between the push piece and the movable spring piece, and generates tension after the push piece rotates a certain angle to keep the movable spring piece in a static closed state or a dynamic closed state.

2. The bistable auxiliary contact assembly according to claim 1, characterized in that: The flipping angles of the push piece in the statically closed state and the dynamically closed state are symmetrical with respect to the horizontal line.

3. The bistable auxiliary contact assembly according to claim 1, characterized in that: The range of the rotation angle A of the push piece is between 30 degrees and 60 degrees.

4. The bistable auxiliary contact assembly according to claim 1, characterized in that: The contact assembly is also configured to include a first static spring assembly and a second static spring assembly that are arranged opposite to each other and are used to form a statically closed state and a dynamically closed state with the movable contact.

5. The bistable auxiliary contact assembly according to claim 1, characterized in that: The push piece is in toothed contact with the first assembly hole. The push piece can rotate when subjected to external force and is fixed after rotating to a certain angle.

6. The bistable auxiliary contact assembly according to claim 1, characterized in that: The component is also configured to include a mounting seat for assembling the assembly part, and a positioning platform for positioning the push piece is formed on the mounting seat; after the assembly part is assembled on the mounting seat, the push piece can contact the positioning platform and can change the contact with the positioning platform under the action of external force.

7. A contactor, characterized in that: The contactor includes the bistable auxiliary contact assembly according to any one of claims 1 to 6, wherein in a non-excited state, a mechanism for pushing the auxiliary contact state switching provided by the contactor does not contact the pushing piece, the pushing block flips a certain angle so that the spring is in a statically closed state, and the tension generated by the tension spring keeps the moving spring in the statically closed state; during the excitation action of the contactor, the mechanism for pushing the auxiliary contact state switching of the contactor moves and contacts the pushing piece, pushes the pushing piece to flip a certain angle to drive the spring to flip in conjunction so that the moving spring is in a dynamically closed state, and then the mechanism for pushing the auxiliary contact state switching does not contact the pushing piece, and the moving spring is kept in a dynamically closed state by the tension generated by the tension spring.

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