CN219435774U - Sealed auxiliary contact assembly - Google Patents

Abstract

The utility model discloses a sealed auxiliary contact assembly, which comprises a base and a guide rod which are connected in a sliding way, wherein the base is provided with a protruding sealing cavity, the sealing cavity is used for the guide rod to extend in when the guide rod is acted by external force, a reset spring is arranged in the sealing cavity, and two ends of the reset spring are respectively abutted against the inner wall of the sealing cavity and the first end of the guide rod so as to be compressed when the first end of the guide rod extends into the sealing cavity, and the guide rod is driven to reset when the external force is lost. The utility model discloses a sealed auxiliary contact assembly, which aims to solve the problem that when a guide rod extends out of a base at a first end, a gap communicated with the inside and the outside of the base is generated, and a sealing cavity protruding out of the surface of the base is arranged on the base so as to allow the guide rod to stretch into the base for the first spring, at the moment, the gap between the guide rod and the base still exists in the base so as to improve the tightness of the auxiliary contact assembly, and reduce the dust amount entering the base so as to protect the contact effect of a contact.

Description

Sealed auxiliary contact assembly

Technical Field

The utility model relates to the technical field of piezoelectric equipment, in particular to a sealed auxiliary contact assembly.

Background

The auxiliary contact is widely applied to switch equipment such as an alternating current contactor, a thermal overload relay, a universal circuit breaker and the like, and the purpose of switching circuit states is achieved by controlling the action of the auxiliary contact so as to simultaneously switch on and off travel switches such as a plurality of microswitches by means of a plurality of contacts on the auxiliary contact.

As shown in fig. 1 and 2, an auxiliary contact assembly in the conventional universal circuit breaker is in an open assembly structure, when the driving rod 1 is acted by external force, the auxiliary contact assembly slides along the base 2 and pushes the contact to switch the working state of the contact, and when the external force is eliminated, the auxiliary contact assembly is reset by the elastic action of the spring 3, and as the auxiliary contact assembly is in an open structure, a plurality of action gaps 4 which are communicated with the inside and the outside of the auxiliary contact assembly are formed at the two ends of the driving rod 1 in the action process, and in the use process, external dust and sand can enter the inside of the auxiliary contact assembly along the action gaps 4 and adhere to the surface of the contact, so that the problem of poor contact can be generated for a long time.

Therefore, how to improve the tightness of the auxiliary contact assembly and avoid the problem of poor contact caused by dust adhesion of the contacts is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

Accordingly, the present utility model is directed to an auxiliary contact assembly for improving the sealing performance of the auxiliary contact assembly, and avoiding the contact failure caused by dust adhesion.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a sealed auxiliary contact subassembly, includes sliding connection's base and guide arm, the base is provided with bellied sealed chamber, sealed chamber is used for supplying the guide arm stretches into when receiving the exogenic action, just be provided with reset spring in the sealed chamber, reset spring's both ends butt respectively sealed intracavity wall reaches the first end of guide arm, in order to be in the first end of guide arm stretches into when sealed intracavity is compressed, and drive when exogenic action disappears the guide arm resets.

Preferably, in the above sealed auxiliary contact assembly, the sealing element is further sleeved on the outer periphery of the second end of the guide rod, an inner ring surface of the sealing element is tightly attached to the outer wall of the second end, and two opposite end surfaces of the sealing element are respectively abutted to the base and the guide rod.

Preferably, in the sealed auxiliary contact assembly, a first protrusion is disposed on an inner surface of the sealing cavity facing the guide rod, a second protrusion is disposed at a first end of the guide rod, and when the return spring is in the sealing cavity, the first protrusion and the second protrusion are clamped into an inner ring of the return spring.

Preferably, in the above sealed auxiliary contact assembly, a sliding groove is formed in the base, the guide rod is embedded in the sliding groove, a limiting block protruding out of the side wall of the guide rod is arranged at the first end of the guide rod, and the limiting block is used for abutting against one end of the sliding groove to prevent the guide rod from sliding off the sliding groove.

Preferably, in the sealed auxiliary contact assembly, the plurality of contacts in the base are symmetrically arranged about the chute, and the plurality of raised contacts on the guide rod for contacting the contacts are uniformly arranged on the guide rod.

Preferably, in the above sealed auxiliary contact assembly, the guide rod is provided with a step protrusion protruding out of the outer wall of the guide rod, the elastic member is sandwiched between the step protrusion and the sealing surface of the base, and the distance between the step protrusion and the sealing surface is not greater than the original length of the sealing member.

Preferably, in the sealed auxiliary contact assembly, the sealing member is a threaded sealing cup with elastic thread-shaped folds in a middle area.

Preferably, in the sealed auxiliary contact assembly, the screw-type sealing leather cup is made of rubber material, and the external surface of the screw-type sealing leather cup is round or rectangular.

Preferably, in the sealed auxiliary contact assembly, the second end is connected with a roller for receiving external force in a rolling way.

Preferably, in the sealed auxiliary contact assembly, the sealed cavity is configured as a cuboid.

According to the technical scheme, the sealed auxiliary contact assembly comprises the base, the guide rod and the reset spring, wherein the base is in sliding connection with the guide rod, the guide rod can change the relative position with the base when one end of the guide rod is acted by external force so as to push or contact a contact in the base to change the working state of the contact; on the other hand, in the prior art, the spring is always arranged at one end of the guide rod under the action of external force, the guide rod needs to be provided with a structure which is abutted against the spring, and when the guide rod is acted by external force and slides, a third gap and a fourth gap are formed between the spring position and the base so that external dust enters the base. According to the sealed auxiliary contact assembly provided by the utility model, the sealing cavity is arranged on the base, so that the first end of the guide rod moves in the sealing cavity in the sliding and resetting process under the action of external force, and therefore, the first gap and the second gap generated between the guide rod and the base can only be communicated with the inside of the base and the inside of the sealing cavity, dust impurities cannot enter the inside of the base from the first gap and the second gap, the operation safety of the contact is improved, and meanwhile, the return spring is arranged in the sealing cavity, so that the structure of one end of the guide rod receiving the action of external force is freely designed, and the return spring is not limited to be arranged, so that the third gap and the fourth gap for dust to enter the inside of the base are generated, and therefore, the sealing performance of the auxiliary contact assembly is improved relative to the prior art, and good operation of the contact in the base is ensured.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a partial cross-sectional structure of an auxiliary contact assembly according to the prior art;

FIG. 2 is a cross-sectional view of an auxiliary contact assembly of the prior art;

FIG. 3 is a schematic view of a partial cross-sectional structure of an auxiliary contact assembly according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of an auxiliary contact assembly provided in an embodiment of the present utility model;

fig. 5 is a schematic diagram of a mating structure of a base and a guide rod in an auxiliary contact assembly according to an embodiment of the present utility model;

wherein, 1 is a driving rod, 2 is a base, 3 is a spring, and 4 is an action gap;

10 is a base, 110 is a sealed cavity, 1110 is a first protrusion, 120 is a contact, 130 is a first gap, 140 is a second gap, 150 is a third gap, 160 is a fourth gap, 20 is a guide rod, 210 is a second protrusion, 220 is a stop block, 230 is a protrusion contact, 240 is a step protrusion, 30 is a return spring, 40 is a seal, and 50 is a roller.

Detailed Description

The utility model discloses an auxiliary contact assembly, which is used for improving the tightness of the auxiliary contact assembly and avoiding the problem of poor contact caused by the adhesion of dust to a contact.

In order to make the solution of the utility model better understood by a person skilled in the art, embodiments of the utility model are described below with reference to the accompanying drawings, and furthermore the embodiments shown below do not have any limiting effect on the inventive content described in the claims. The whole contents of the constitution shown in the following examples are not limited to the solution of the utility model described in the claims.

As shown in fig. 3, fig. 4 and fig. 5, the sealed auxiliary contact assembly provided by the embodiment of the utility model includes a base 10, a guide rod 20 and a return spring 30, wherein the base 10 is slidably connected with the guide rod 20, the guide rod 20 can change the relative position with the base 10 when one end is subjected to an external force, so as to change the working state of the contact 120 by changing the pressing or contacting the contact 120 in the base 10 through the position, in particular, in the sealed auxiliary contact assembly provided by the embodiment of the utility model, the base 10 is provided with a sealed cavity 110 protruding out of one outer surface of the base 10, the sealed cavity 110 is used for the guide rod 20 to slide into the base 10 under the action of the external force, and the guide rod 20 can slide along the base 10 under the action of the external force and can generate unavoidable first gap 130 and second gap 140 due to the structural requirement, in the prior art, the first gap 130 and the second gap 140 can be directly communicated with the inner side and outer side of the base 10, so that impurities such as dust can enter the inside the base 10 from the first gap 130 and the second gap 140 and can enter the inside the contact 10, and the sealed cavity 110 can be well communicated with the inner cavity 110 and the sealed cavity 110 is only arranged under the action of the external force, and the sealing cavity 110 can be guaranteed to be well communicated with the inner cavity 110 and the sealed cavity 110 is formed between the guide rod 20 and the base 10 and the inner cavity 110.

On the other hand, as shown in fig. 1 and 2, in the prior art, the spring 3 is usually disposed at one end of the driving rod 1 under the action of an external force, the driving rod 1 needs to be provided with a structure that abuts against the spring 3, and when the driving rod 1 is under the action of an external force and slides, an action gap 4, that is, a third gap 150 and a fourth gap 160 in fig. 4, is formed between the periphery of the spring 3 and the base 2, so that external dust enters the inside of the base 10, while in the sealed auxiliary contact assembly provided by the embodiment of the utility model, the return spring 30 is disposed in the sealed cavity 110, two ends of the return spring 30 abut against the inner wall of the sealed cavity 110 and the first end of the guide rod 20 respectively, and the return spring 30 is compressed when the first end of the guide rod 20 extends into the sealed cavity 110, so that when the external force applied by the guide rod 20 disappears, the end of the guide rod 20 under the action of the external force has no spring interference, that the arrangement of the sealed structure can be performed, so as to prevent dust from entering the inside of the base 10 from the positions of the third gap 150 and the fourth gap 160.

According to the sealed auxiliary contact assembly provided by the embodiment of the utility model, the sealed cavity 110 is arranged on the base 10, so that the first end of the guide rod 20 moves in the sealed cavity 110 in the process of sliding and resetting under the action of external force, the first gap 130 and the second gap 140 generated between the guide rod 20 and the base 10 can only be communicated with the inside of the base 10 and the inside of the sealed cavity 110, dust impurities cannot enter the inside of the base 10 from the first gap 130 and the second gap 140, the operation safety of the contact 120 is improved, meanwhile, the return spring 30 is arranged in the sealed cavity 110, the structure of one end of the guide rod 20 receiving the action of external force is freely designed, and the return spring 30 is not limited to be arranged, so that dust enters the third gap 150 and the fourth gap 160 in the inside of the base 10, and therefore, compared with the prior art, the sealing performance of the auxiliary contact assembly is improved, and good operation of the contact 120 in the base 10 is ensured.

Further, the sealing of the third gap 150 and the fourth gap 160 generated during the movement of the guide rod 20 may be achieved by providing a sealing structure on the guide rod 20, or may be achieved by providing an external sealing component, in a specific embodiment of the present utility model, in order to simplify the structure of the guide rod 20, the second end periphery of the guide rod 20 is sleeved with the sealing component 40, where the second end of the guide rod 20 is an end of the guide rod 20 for receiving the external force, the inner ring surface of the sealing component 40 is closely attached to the outer wall of the second end so as to tightly contact with the guide rod 20, and simultaneously, two opposite end surfaces of the sealing component 40 respectively abut against the base 10 and the guide rod 20, during the sliding of the guide rod 20 along the base 10, the sealing component 40 always keeps the inner ring tightly contacts with the outer wall of the second end of the guide rod 20, and simultaneously, through the abutting against the end of the base 10, seals the fourth gap 160 of the third gap 150 towards one side of the outside of the base 10, so as to avoid dust entering the inside of the base 10 from the third gap 150 and the fourth gap 160.

Further, in order to enable the return spring 30 to be stably disposed in the seal cavity 110 to ensure the movement and the return effect of the guide rod 20, in a specific embodiment of the present utility model, a first protrusion 1110 is disposed on an inner surface of the seal cavity 110 facing the guide rod 20, and a second protrusion 210 facing the first protrusion 1110 is disposed at a first end of the guide rod 20, and when the return spring 30 is disposed in the seal cavity 110, the first protrusion 1110 and the second protrusion 210 are clamped into an inner ring of the return spring 30, so that the return spring 30 can only generate displacement in an axial direction, and stability of compression and return is ensured.

Further, in the sealed auxiliary contact assembly provided by the embodiment of the utility model, the sliding groove is formed in the base 10, the guide rod 20 is embedded and slidably arranged in the sliding groove, meanwhile, in order to prevent the guide rod 20 from sliding off the sliding groove in the sliding process, the position of the first end of the guide rod 20 is provided with the limiting block 220 protruding out of the side wall of the guide rod 20, and the maximum size of the guide rod 20 at the position of the limiting block 220 is larger than the size of the sliding groove, so that the guide rod 20 can be stably arranged in the sliding groove by abutting one end of the sliding groove through the limiting block 220 when no external force acts.

In order to further optimize the above technical solution, the plurality of contacts 120 in the base 10 are symmetrically arranged about the sliding slot, so that the plurality of bump contacts 230 on the guide rod 20 for contacting the contacts 120 can also be symmetrically arranged about the sliding slot, i.e. the plurality of bump contacts 230 are uniformly arranged on the guide rod 20, so that the guide rod 20 is regular in structure and easy to manufacture.

Further, in order to stably arrange the sealing element 40 between the base 10 and the guide rod 20, in a specific embodiment of the present utility model, the guide rod 20 is provided with a step protrusion 240 protruding from an outer wall of the guide rod 20, an elastic element is sandwiched between the step protrusion 240 and a sealing surface of the base 10, and a distance between the step protrusion 240 and the sealing surface is not greater than an original length of the sealing element 40, where the original length specifically refers to a thickness of the sealing element 40 in an axial direction, that is, when the sealing element 40 is sleeved on an outer circumference of the guide rod 20, the distance between the step protrusion 240 and the sealing surface is not greater than the original length of the sealing element 40, so that the sealing element 40 can be compressed to ensure a sealing effect, and it is required that the sealing surface is a surface facing the step protrusion 240 of the base 10, and the step protrusion 240 is not only capable of preventing the sealing element 40 sleeved on the outer wall of the guide rod 20 from sliding from the guide rod 20, but also controlling a distance between the step protrusion and the sealing surface to slightly compress the sealing element 40 in a matching effect, so that the sealing element 40 is kept stable.

Further, in an embodiment of the present utility model, the sealing member 40 is a threaded sealing cup with elastic thread-shaped folds in the middle area, and the elastic folds of the threaded sealing cup realize continuous contact with the guide rod 20 and the base 10 during sliding of the guide rod 20, and follow the guide rod 20 to move synchronously when the guide rod 20 is reset.

Further, in an embodiment of the present utility model, the screw-type sealing cup is made of rubber, and its outer surface is configured in a circular or rectangular shape, and its inner ring is a structure that fits the inner wall of the guide rod 20, and the inner ring and the outer wall of the guide rod 20 are preferably in interference fit.

In order to further optimize the above technical solution, in a specific embodiment of the present utility model, the second end of the guide rod 20 is further connected with the roller 50 in a rolling manner, the roller 50 is disposed on the guide rod 20 through a roller shaft, and it should be noted that, considering that when the guide rod 20 receives an external force, there may be a plurality of situations in the external force direction, in which the component force of the external force direction acting on the preset movement direction of the guide rod 20 is small, and in which the guide rod 20 is difficult to slide along the base 10, the roller 50 is disposed at the second end of the guide rod 20, so that the force acting on the moving end of the guide rod 20 can be caused to push the guide rod 20 to slide smoothly along the base 10 by driving the roller 50 to rotate.

Further, the sealing cavity 110 may be a cylinder or a cuboid, which can accommodate the first end of the guide rod 20, and in an embodiment of the present utility model, the sealing cavity 110 is a cuboid structure with a structure easier to manufacture. The terms first, second, left and right in the description and the claims of the present utility model and in the above-described drawings, etc. are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but may include steps or elements not expressly listed.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a sealed auxiliary contact subassembly, includes sliding connection's base (10) and guide arm (20), its characterized in that, base (10) are provided with bellied sealed chamber (110), sealed chamber (110) are used for supplying guide arm (20) stretch into when receiving external force effect, just be provided with reset spring (30) in sealed chamber (110), the both ends of reset spring (30) butt respectively sealed chamber (110) inner wall and the first end of guide arm (20), in order to be in first end of guide arm (20) stretches into in sealed chamber (110) is compressed, and drives when external force effect disappears guide arm (20) reset.

2. The sealed auxiliary contact assembly according to claim 1, further comprising a sealing member (40) sleeved on the outer periphery of the second end of the guide rod (20), wherein an inner ring surface of the sealing member (40) is tightly attached to the outer wall of the second end, and two opposite end surfaces of the sealing member (40) are respectively abutted against the base (10) and the guide rod (20).

3. The sealed auxiliary contact assembly according to claim 1, wherein a first protrusion (1110) is provided on an inner surface of the sealing cavity (110) facing the guide rod (20), a second protrusion (210) is provided on a first end of the guide rod (20), and the first protrusion (1110) and the second protrusion (210) are clamped into an inner ring of the return spring (30) when the return spring (30) is in the sealing cavity (110).

4. The sealed auxiliary contact assembly according to claim 1, wherein a chute is formed in the base (10), the guide rod (20) is embedded in the chute, a limiting block (220) protruding out of the side wall of the guide rod (20) is arranged at a first end of the guide rod (20), and the limiting block (220) is used for abutting against one end of the chute to prevent the guide rod (20) from slipping out of the chute.

5. The sealed auxiliary contact assembly according to claim 4, wherein a plurality of contacts (120) in the base (10) are symmetrically arranged about the chute, and a plurality of raised contacts (230) on the guide bar (20) for contacting the contacts (120) are uniformly arranged on the guide bar (20).

6. The sealed auxiliary contact assembly according to claim 2, wherein a step protrusion (240) protruding out of the outer wall of the guide rod (20) is provided on the guide rod (20), the sealing surface of the base (10) and the step protrusion (240) sandwich the sealing member (40), and the distance between the step protrusion (240) and the sealing surface is not greater than the original length of the sealing member (40).

7. A sealed auxiliary contact assembly according to claim 2, wherein the seal (40) is a screw-type sealing cup provided with resilient screw-like folds in the intermediate region.

8. The encapsulated auxiliary contact assembly of claim 7, wherein the threaded sealing cup is of rubber material and has an outer surface configured in a circular or rectangular shape.

9. A sealed auxiliary contact assembly according to claim 1, wherein the second end of the guide rod (20) is rollably connected with a roller (50) for receiving an external force.

10. The encapsulated auxiliary contact assembly of any of claims 1-9, wherein the encapsulation cavity (110) is configured as a cuboid.