CN215680578U

CN215680578U - A contact arm and circuit breaker for fastener of circuit breaker contact arm, circuit breaker

Info

Publication number: CN215680578U
Application number: CN202121695216.6U
Authority: CN
Inventors: 牟列斌; 张豪
Original assignee: Siemens Switchgear Ltd
Current assignee: Siemens Switchgear Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-01-28
Anticipated expiration: 2031-07-23

Abstract

The utility model provides a catch for a contact arm of a circuit breaker, the contact arm of the circuit breaker and the circuit breaker, the contact arm is provided with a first body (101) and a screw rod (102), a part of the screw rod (102) extends out from a first end (1011) of the first body (101), the screw rod (102) can slide in the body (101), the catch (20) comprises: a second body (201), said second body (201) having a through hole (2011); the clamping part comprises a plurality of tooth parts (202), the tooth parts (202) are distributed at the edge of the through hole (2011), and the clamping part is used for sleeving the extending part of the screw rod (102) and is in interference fit with the screw rod (102) so as to prevent the extending part of the screw rod (102) from sliding into the first body (101).

Description

A contact arm and circuit breaker for fastener of circuit breaker contact arm, circuit breaker

Technical Field

The utility model relates to the field of circuit breakers, in particular to a clamping piece for a contact arm of a circuit breaker, the contact arm of the circuit breaker and the circuit breaker.

Background

Circuit breakers are an important component of switchgear. The circuit breaker controls the on-off of a main circuit through the connection of a moving contact and a fixed contact of the circuit breaker, and the moving contact is generally fixed through a contact arm. How to rapidly assemble the circuit breaker becomes a problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a card member for a contact arm of a circuit breaker, the contact arm having a first body and a screw, a portion of the screw protruding from a first end of the first body, the screw being slidable in the body, the card member comprising:

a second body having a through hole;

the clamping part comprises a plurality of tooth-shaped parts, the tooth-shaped parts are distributed at the edge of the through hole, and the clamping part is used for sleeving the extending part of the screw rod and is in interference fit with the screw rod so as to prevent the extending part of the screw rod from sliding into the first body.

Like this, block through this fastener that the screw rod stretches out the part of first body and slide into first body again, can avoid like this to release first body again with the screw rod, and this fastener need not to dismantle, has saved man-hour greatly, is fit for the digital workshop that need not artifical the equipment, can prevent moreover that the cover from establishing the spare part that the screw rod is located first body part and drop, for example can prevent droing of packing ring.

According to the clip as described above, optionally, the material of the clip is nylon. Such materials have a certain elasticity and a certain hardness.

According to the card connector as described above, optionally, the second body is an annular body or the second body is flat. Such a structure is simple.

According to the clip as described above, optionally, the teeth are uniformly distributed along the edge of the through hole or the second body and the holding portion are integrally formed. Such a structure is relatively simple to manufacture.

According to the clamping piece, optionally, a nut is arranged in the first body and is close to the first end, and the outer diameter of the second body is larger than the inner diameter of the nut. The nut can block the screw from sliding out of the first body completely.

According to the clip as described above, optionally, a side of the tooth portion toward the center of the through hole is arc-shaped; or one side of the tooth parts facing to the center of the through hole is positioned on the circumference of the same circle. Therefore, the tooth-shaped part can be attached to the screw rod as much as possible, and the screw rod can be better applied with clamping force.

The utility model also provides a contact arm for a circuit breaker, the contact arm for the circuit breaker is provided with a first body and a screw rod, a part of the screw rod extends out of the first end of the first body, the screw rod can slide in the body, and the contact arm comprises the clamping piece for the contact arm for the circuit breaker.

According to the contact arm, optionally, an end of the screw rod away from the first body is used for fixing on a fixing part, the first end is provided with a groove, and the clip is pushed into the groove under the condition that the screw rod is fixed on the fixing part. Thus, the clamping piece 20 does not need to be disassembled, and the normal working and assembling of the circuit breaker are not influenced.

According to the contact arm, optionally, the first body is cylindrical, and the contact arm further includes:

a nut located inside the first body, the screw being capable of being threaded through the nut;

the screw rod is located in the first body, one end of the screw rod located in the first body is provided with a stopping portion, the outer diameter of the stopping portion is larger than the inner diameter of the washer and larger than the inner diameter of the nut, and the washer is located between the nut and the stopping portion.

According to the contact arm as described above, optionally, the nut is screwed to an inside of the first body near the first end. The structure is convenient to assemble.

The utility model also provides a circuit breaker, which comprises the contact arm clamping piece for the circuit breaker.

Drawings

The foregoing and other features and advantages of the utility model will become more apparent to those skilled in the art to which the utility model relates upon consideration of the following detailed description of a preferred embodiment of the utility model with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a contact arm for a circuit breaker according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a contact arm for a circuit breaker according to another embodiment of the present invention.

Fig. 3 is a schematic structural view of a card member in a first body according to another embodiment of the utility model.

Wherein the reference numbers are as follows:

101-first body

1011-first end

1012-second end

1013-groove

102-screw

1021-stop

103-nut

104-gasket

20-card member

201-second body

2011-through hole

202-tooth part

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.

As shown in fig. 1, the contact arm of the circuit breaker has a first body 101 and a screw 102, and the first body 101 has two ends, i.e., a first end 1011 and a second end 1012. The screw 102 projects from a first end 1011 projecting from the first body 101, the screw 102 being able to slide in the first body 101. As an exemplary illustration, fig. 1 is a schematic diagram of a contact arm structure of a circuit breaker. The first body 101 may be hollow, specifically may be a cylindrical body, and more specifically, may be cylindrical. One end of the screw 102 is located inside the first body 101, and the other end protrudes from the inside of the first body 101. The protruding portion of the screw 102 is used to be fixed to a fixed component (not shown), for example, the protruding portion of the screw 102 is fixed to the fixed component by screwing. Therefore, the protruding portion is required to maintain the protruding state. If the part slides into the first body 101, it also requires the staff to manually push the screw 102 out of the first body 101 again from the second end 1012, which is time consuming and not conducive to the quick assembly of the circuit breaker. Based on this, the utility model person of the present invention provides a clip for a contact arm of a circuit breaker to block the portion of the screw 102 protruding from sliding into the first body 101.

The utility model provides a clamping piece for a contact arm of a circuit breaker. As shown in fig. 2, the clip 20 includes a second body 201 and a clip, and the second body 201 and the clip may be integrally formed. The card member 20 may be flat as a whole to minimize the space occupied by the card member 20.

The second body 201 has a through hole 2011, the retaining portion includes a plurality of tooth portions 202, the plurality of tooth portions 202 are distributed at the edge of the through hole 2011, and the retaining portion is configured to sleeve the extended portion of the screw 102 and is in interference fit with the screw 102 to prevent the screw 102 from sliding into the first body 101. The teeth 202 may be evenly distributed on the edge of the through-hole 2011, which can apply an even retaining force to the screw 102. The blocking of the screw 102 from sliding into the first body 101 here means that at least the part of the screw 102 protruding for fixing to the fixing member does not slide into the first body 101, e.g. the thread on the screw 102 needs to be left on the outside. With the tooth 202, the tooth 202 can not fall off from the thread section due to the existence of the thread.

The second body 201 may be a ring-shaped body, and the teeth 202 may be uniformly distributed at the edge of the through-hole 2011. Fig. 2 shows 6 tooth portions 202, and in practice, the number of the tooth portions 202 may be determined according to actual needs, for example, is greater than or equal to 6, and is not described herein again. This can not only maintain a sufficient holding force but also reduce the weight of the card member 20. For example, if the first body 101 is cylindrical, the second body 201 is annular.

Optionally, the material of the latch 20 requires a certain hardness and a certain elasticity, so that the latch 20 can move in two directions along the screw 102 to adapt to the assembly of the circuit breaker. Optionally, the clip member 20 is plastic, such as nylon.

The second body 201 and the retaining portion may be integrally formed, for example, by stamping a nylon plate.

As an exemplary illustration, the first body 101 may be cylindrical, i.e., hollow inside, and may be cylindrical. The contact arm may also include a nut 103. The nut 103 is located inside the first body 101, and the screw 102 can penetrate through the nut 103 and is in clearance fit with the nut 103. The contact arm may further include a washer 104, the washer 104 is located inside the first body 101 and is configured to be sleeved on the screw 102, one end of the screw 102 located inside the first body 101 has a stopping portion 1021, a diameter of the stopping portion 1021 is greater than an inner diameter of the washer 104 and greater than an inner diameter of the nut 103, and the washer 104 is located between the nut 103 and the stopping portion 1021. The nut 103 serves to block the screw 102 from sliding out completely from the first body 101. As an exemplary illustration, there is a thread near the first end 1011 of the first body 101 by which the nut 103 may be threadably secured to the interior of the first body 101.

As shown in fig. 1, one end of the screw 102 has a stopping portion 1021, and the diameter of the stopping portion 1021 may be larger than the inner diameter of the nut 103, so as to block the screw 102 from fully extending from the first body 101. The nut 103 may be fixed inside the first body 101, and the diameter of the stopping portion 1021 may be larger than the inner diameter of the nut 103. The washer 104 sleeved on the screw 102 can play a role of anti-loosening, i.e. preventing the contact arm from loosening with the fixed part. The length of the screw 102 may be less than the length of the interior of the first body 101, as shown in fig. 1.

In practical use, a manufacturer can sleeve the washer 104 on the screw 102 from an end away from the stopping portion 1021, extend an end of the stopping portion 1021 into the first body 101, sleeve the nut 103 on the screw 102, and fix the nut 103 to the inside of the first body 101 by rotation. The clip 20 is fitted over the end of the screw 102 from which it extends. Because the clamping piece 20 is in interference fit with the screw rod 102, and the outer diameter of the clamping piece 20 is larger than the inner diameter of the nut 103, even if the first body 101 is erected, the clamping piece 20 can enable the screw rod 102 to at least partially extend out of the first body 101, so that the screw rod 102 can be prevented from dropping into the first body 101, the gasket 104 can be prevented from falling off from the first screw rod 102, and the nut is suitable for transportation. In this way, when the contact arm arrives at the customer, the customer can directly fix the portion of the screw 102 protruding from the first body 101 to the fixed part for the assembly of the circuit breaker.

In addition, because the clamping piece 20 is integrally flat, the clamping piece 20 does not need to be disassembled in the assembling process, and only the clamping piece 20 needs to be kept on the screw rod 102, so that the working hour can be saved, and the clamping piece is particularly suitable for digital production. Specifically, as shown in fig. 2 and 3, the first end 1011 has a recess 1013 therein, and the recess 1013 can accommodate the clip member 20. The recess 1013 may be formed in a variety of ways, such as forming a step at the first end 1011, where the right side of the step is the nut 103, or forming a recess at the first end 1011 and opening at the nut 103, which will not be described herein. As an illustrative example, the recess 1013 can be completely matched with the escapement 20. The end of the screw 102 remote from the stopping portion 1021 can be fixed to a fixing component, for example, by the thread on the screw 102, and during the process of fixing the screw 102 to the fixing component, the latch 20 can be gradually pushed into the groove 1013 from the position shown in fig. 2, and the contact arm can abut against the fixing component, so that the latch 20 does not need to be detached and the normal function of the circuit breaker is not affected.

In this way, the part of the screw 102 extending out of the first body 101 is blocked by the clamping piece 20 to slide into the first body 101 again, so that the screw 102 is prevented from being pushed out of the first body 101 again, the clamping piece 20 is not required to be disassembled, the working hours are greatly saved, the clamping piece is suitable for a digital workshop without manual assembly, and parts sleeved on the part of the screw 102 located on the first body 101 can be prevented from falling off, for example, the gasket 104 can be prevented from falling off. Optionally, the teeth 202 are evenly distributed along the edge of the through-hole 2011. This allows the clamping force on the screw 102 to be more uniform.

Alternatively, the side of the tooth 202 toward the center of the through-hole 2011 is arc-shaped; or the side of the plurality of teeth 202 toward the center of the through-hole 2011 forms a circle. This enables the teeth 202 to engage the screw 102 as closely as possible, providing a better grip for the screw 102.

The utility model also provides a contact arm for the circuit breaker, which comprises any clamping piece of the contact arm for the circuit breaker. The utility model also provides a circuit breaker, which comprises any clamping piece for the contact arm of the circuit breaker.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A strike (20) for a contact arm of a circuit breaker, said contact arm having a first body (101) and a threaded rod (102), a portion of said threaded rod (102) projecting from a first end (1011) of said first body (101), said threaded rod (102) being slidable in said body (101), characterized in that said strike (20) comprises:

a second body (201), said second body (201) having a through hole (2011);

the clamping part comprises a plurality of tooth parts (202), the tooth parts (202) are distributed at the edge of the through hole (2011), and the clamping part is used for sleeving the extending part of the screw rod (102) and is in interference fit with the screw rod (102) so as to prevent the extending part of the screw rod (102) from sliding into the first body (101).

2. The clip (20) of claim 1, wherein the material of the clip (20) is nylon.

3. The clip (20) of claim 1, wherein said second body (201) is an annular body or said second body (201) is flat.

4. The clip (20) of claim 1, wherein the teeth (202) are evenly distributed along the edge of the through-hole (2011) or the second body (201) and the clip are integrally formed.

5. The clip (20) of claim 1 wherein said first body (101) has a nut (103) therein and said nut (103) is adjacent said first end (1011), said second body (201) having an outer diameter greater than an inner diameter of said nut (103).

6. The clip (20) according to any of claims 1-5, wherein the tooth (202) is radiused on the side facing the centre of the through hole (2011); or the side of the tooth parts (202) facing the center of the through hole (2011) is positioned on the circumference of the same circle.

7. Contact arm for a circuit breaker, having a first body (101) and a threaded rod (102), a portion of said threaded rod (102) projecting from a first end (1011) of said first body (101), said threaded rod (102) being able to slide in said body (101), characterized in that it comprises a catch (20) for a contact arm for a circuit breaker according to any one of claims 1 to 6.

8. Contact arm according to claim 7, characterized in that the end of the screw (102) remote from the first body (101) is intended to be fixed to a fixing part, the first end (1011) having a recess into which the catch (20) is pushed with the screw (102) fixed to the fixing part.

9. Contact arm according to claim 7, characterized in that said first body (101) is cylindrical, said contact arm further comprising:

a nut (103) located inside said first body (101), said screw (102) being able to pass through said nut (103);

the gasket (104) is located inside the first body (101) and is used for being sleeved on the screw rod (102), one end, located inside the first body (101), of the screw rod (102) is provided with a stopping portion (1021), the outer diameter of the stopping portion (1021) is larger than the inner diameter of the gasket (104) and larger than the inner diameter of the nut (103), and the gasket (104) is located between the nut (103) and the stopping portion (1021).

10. Contact arm according to claim 9, characterized in that said nut (103) is screwed to the inside of said first body (101) close to said first end (1011).

11. Circuit breaker, characterized in that it comprises a catch (20) for a contact arm of a circuit breaker according to any one of claims 1 to 6.