CN217061966U

CN217061966U - Plastic shell type circuit breaker

Info

Publication number: CN217061966U
Application number: CN202122479320.8U
Authority: CN
Inventors: 安翔宇; 李俐; 唐璠; 雷亚辉
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-07-26
Anticipated expiration: 2031-10-14

Abstract

A plastic shell type circuit breaker comprises a shell, a draw bar and a contact loop, wherein the draw bar and the contact loop are respectively arranged in the shell, the draw bar is used for triggering the contact loop to trip, a test button is arranged on the shell, a test rod is arranged on the draw bar, a lapping surface matched with the test button is arranged on the top side of the test rod, the test button can push the lapping surface of the test rod when being pressed down and slide on the lapping surface to one end far away from the draw bar, the draw bar is driven to rotate by the test rod, a limit bump for limiting the test button is arranged on one end far away from the draw bar of the lapping surface, the test button can push the lapping surface of the test rod to drive the draw bar to rotate when being pressed down, the plastic shell type circuit breaker has the characteristics of simple structure and low cost, meanwhile, the limit bump for limiting the test button is arranged on the lapping surface, on the basis of simple structure, the stroke of the test button can be prevented from being too large, the test button is prevented from sliding out of the test rod to cause blocking, and the test function of the plastic shell type circuit breaker is guaranteed not to lose efficacy.

Description

Plastic shell type circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a mould shell type circuit breaker.

Background

The plastic shell type circuit breaker is generally provided with a test button, the test button is generally of an automatic reset type, and the test function and the automatic reset can be completed through pressing. However, the test button of the existing plastic shell type circuit breaker is easy to be blocked, so that the test function is invalid, and the service life of the plastic shell type circuit breaker is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a test button can not block dead mould shell type circuit breaker.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a mould shell type circuit breaker, its includes the casing and sets up traction lever and the contact circuit in the casing respectively, and the traction lever is used for triggering the contact circuit and is tripped, is equipped with test button on the casing, be equipped with the test bar on the traction lever, be equipped with in the top side of test bar with test button complex faying surface, test button can promote the faying surface of test bar when being pressed to the one end of keeping away from the traction lever slides on the faying surface, drives the traction lever through the test bar and rotates, the faying surface is equipped with the spacing bump that is used for spacing test button in the one end of keeping away from the traction lever.

Preferably, the test button is provided with a driving surface for pushing the overlapping surface, and the overlapping surface is in line contact with the driving surface.

Preferably, the test button is provided with a driving surface for pushing the lapping surface, and the lapping surface and the driving surface are obliquely arranged.

Preferably, the test button comprises a compression bar and a spring connected with the compression bar.

Preferably, the bottom of depression bar is equipped with and is used for promoting the driving surface of faying surface, driving surface and the length direction parallel arrangement of mould shell type circuit breaker, the faying surface is equipped with the one end tilt up of spacing bump.

Preferably, the test rod comprises two opposite side surfaces, the lapping surface is connected between the tops of the two side surfaces, one side surface is connected with the traction rod, and the other side surface is arranged at intervals with the traction rod.

Preferably, two sides be parallelogram's left surface and right flank respectively, the faying surface is connected between the top of left surface and right flank, through oblique bottom surface connection between the bottom of left surface and right flank, oblique bottom surface with faying surface parallel arrangement links to each other through leading flank and trailing flank respectively between all the other both sides of left surface and right flank, the trailing flank is close to the one end and the drawbar connection of right flank, the trailing flank is equipped with near the one end of left surface and dodges the groove.

Preferably, an operating mechanism matched with the draw bar is arranged in the shell, the contact loops respectively comprise a moving contact, a fixed contact and a tripping mechanism, the draw bar is provided with tripping rods matched with the tripping mechanisms of the contact loops respectively, the tripping mechanism comprises an armature and a bimetallic strip, the armature or the bimetallic strip of the contact loop can respectively push the tripping rods to trigger the draw bar to rotate, the operating mechanism is unlocked through the draw bar, and the test button is pressed to drive the draw bar to rotate to unlock the operating mechanism through the test bar.

Preferably, the two ends of the pressure lever are respectively provided with an operating head and a driving surface, the middle part of the pressure lever is provided with a limiting structure, and the spring drives the limiting structure to limit the shell; the shell is provided with a button groove, the bottom of the button groove is provided with a button hole used for avoiding the pressure rod, the spring is sleeved on the outer side of the pressure rod, and two ends of the spring are respectively propped against the button groove and the operating head.

Preferably, the middle part of the pressure rod is provided with a shrinkage hole, the outer side of the pressure rod corresponding to the shrinkage hole is provided with an inclined leading-in surface, one end of the leading-in surface close to the driving surface is flush with the outer side of the pressure rod, one end of the leading-in surface close to the operating head is higher than the outer side of the pressure rod and forms the limiting structure, and after the limiting structure penetrates through the button hole, the spring drives the limiting structure to abut against the shell for limiting.

The utility model discloses a mould shell type circuit breaker, test button promote the faying surface of test rod when being pressed and drive the traction lever and rotate, have simple structure and characteristics with low costs, set up the spacing bump that is used for spacing test button simultaneously on the faying surface, on simple structure's basis, can also prevent that the test button stroke is too big, avoid test button roll-off test rod to lead to the card dead, guarantee that the test function of mould shell type circuit breaker can not become invalid.

In addition, the assembly structure of depression bar and spring of this embodiment is convenient, can be after accomplishing moulded case circuit breaker's installation, from the outside direct assembly of casing can, simple to operate is swift.

Drawings

Fig. 1 is a schematic structural diagram of the plastic shell type circuit breaker of the present invention;

fig. 2 is a cross-sectional view of the plastic shell type circuit breaker of the present invention;

fig. 3 is an enlarged view of a portion of fig. 2 according to the present invention;

fig. 4 is a schematic structural diagram of the testing button and the traction rod of the present invention.

Detailed Description

The following describes the embodiment of the molded case circuit breaker according to the present invention with reference to fig. 1 to 4. The molded case circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-4, the utility model discloses a mould shell type circuit breaker includes the casing and sets up traction lever 1 and the contact circuit (not shown in the figure) in the casing respectively, and traction lever 1 is used for triggering the contact circuit and drops off, is equipped with test button 2 on the casing, be equipped with test rod 3 on traction lever 1, be equipped with in the top side of test rod 3 with test button 2 complex faying face 30, test button 2 can promote test rod 3's faying face 30 when being pressed to slide to the one end of keeping away from traction lever 1 on faying face 30, drive traction lever 1 through test rod 3 and rotate, faying face 30 is equipped with spacing bump 31 that is used for spacing test button 2 in the one end of keeping away from traction lever 1.

The utility model discloses a mould shell type circuit breaker, test button 2 promotes test rod 3's faying surface 30 and drives traction lever 1 and rotate when being pressed, has simple structure and characteristics with low costs, set up the spacing bump 31 that is used for spacing test button 2 simultaneously on faying surface 30, on simple structure's basis, can also prevent that test button 2 stroke is too big, avoid test button 2 roll-off test rod 3 to lead to the card to die, guarantee that the test function of mould shell type circuit breaker can not become invalid.

As shown in fig. 3 to 4, the test button 2 is provided with a driving surface 20 for pushing the overlapping surface 30, and the overlapping surface 30 is in line contact with the driving surface 20. Specifically, the test button 2 comprises a pressing rod 21 and a spring 22 connected with the pressing rod 21, a driving surface 20 used for pushing the overlapping surface 30 is arranged at the bottom of the pressing rod 21, the overlapping surface 30 and the driving surface 20 are obliquely arranged, and the obliquely arranged overlapping surface 30 and the driving surface 20 can enable the driving surface 20 to be in line contact when pushing the overlapping surface 30, so that surface contact can be avoided, the contact area can be further reduced, and friction force can be reduced. Specifically, the driving surface 20 of the present embodiment is parallel to the length direction of the molded case circuit breaker, the end of the overlapping surface 30 where the limiting protruding point 31 is disposed inclines upward, the overlapping surface 30 is inclined with the driving surface 20 when the test button 2 is not pressed down, the pressure rod 21 is in line contact with the test rod 3 during the contact and the pressing process, and the pressure rod 21 moves in place when the line contact is switched to the surface contact. It can be understood that, the driving surface 20 and the faying surface 30 can also be exchanged, the faying surface 30 is arranged in parallel with the length direction of the molded case circuit breaker, and the driving surface 20 and the faying surface 30 are arranged obliquely, or both are oblique, that is, both are oblique with the length direction of the molded case circuit breaker, which belongs to the protection scope of the present invention.

As shown in fig. 3-4, when the test button 2 is pressed, the compression bar 21 drives the traction rod 1 to rotate counterclockwise through the test bar 3, the test bar 3 rotates counterclockwise along with the traction rod 1, the compression bar 21 gradually moves downward, the limit salient point 31 of the overlapping surface 30 gradually approaches the compression bar 21, the compression bar 21 is limited, the compression bar 21 is prevented from offsetting, and the compression bar 21 is prevented from being reset due to excessive pressing.

Further, the test rod 3 of this embodiment includes two sides that set up relatively, faying face 30 is connected between the top of two sides, and one of them side with traction lever 1 is connected, another side with traction lever 1 interval sets up, can effectively utilize the space, increases the volume and the intensity of test rod 3. Specifically, test rod 3 is roughly the parallelepiped structure, two sides be parallelogram's left surface 34 and right flank 37 respectively, faying face 30 is connected between the top of left surface 34 and right flank 37, is connected through oblique bottom surface 35 between the bottom of left surface 34 and right flank 37, oblique bottom surface 35 with faying face 30 parallel arrangement links to each other through leading flank 32 and trailing flank 36 between the other both sides of left surface 34 and right flank 37 respectively, the one end that trailing flank 36 is close to right flank 37 is connected with traction lever 1, the one end that trailing flank 36 is close to left surface 34 is equipped with and dodges groove 33.

As shown in fig. 4, the two ends of the pressing rod 21 are respectively provided with an operating head 23 and a driving surface 20, the middle part of the pressing rod 21 is provided with a limiting structure 24, and the spring 22 drives the limiting structure 24 to limit the position of the shell. Specifically, a button groove 27 is formed in the housing, a button hole for avoiding the pressure lever 21 is formed in the bottom of the button groove 27, the spring 22 is sleeved outside the pressure lever 21, two ends of the spring 22 respectively abut against the button groove 27 and the operating head 23, a contraction hole 25 is formed in the middle of the pressure lever 21, an inclined leading-in surface 26 is arranged on the outer side, corresponding to the contraction hole 25, of the pressure lever 21, one end, close to the driving surface 20, of the leading-in surface 26 is flush with the outer side of the pressure lever 21, one end, close to the operating head 23, of the leading-in surface 26 is higher than the outer side of the pressure lever 21 and forms the limiting structure 24, the inclined leading-in surface 26 can conveniently penetrate through the button hole from the top, meanwhile, the pressure lever 21 can elastically contract towards the inside of the contraction hole 25, difficulty in penetrating through the button hole is reduced, and after the limiting structure 24 penetrates through the button hole, the limiting structure 24 drives the limiting structure 24 to abut against the housing from the other side of the button hole for limiting. The assembly structure of the pressing rod 21 and the spring 22 is convenient, and can be directly assembled from the outside of the shell after the molded case circuit breaker is installed, so that the installation is convenient and rapid.

As shown in fig. 1, the present embodiment is a three-pole molded case circuit breaker, which is provided with three sets of side-by-side contact loops, the housing includes a base 41 and a cover 42, an elongated cavity 40 for accommodating the three sets of contact loops is disposed in the housing, the three sets of contact loops (not shown) include a movable contact, a stationary contact and a trip mechanism 43, an operating mechanism 44 cooperating with the drawbar 1 and a handle 48 cooperating with the operating mechanism 44 are disposed above the middle cavity 40, the test rod 3 and the test button 2 are disposed above the contact loops located at the outer side, the drawbar 1 is provided with a trip rod 45 cooperating with the trip mechanisms 43 of the three sets of contact loops, respectively, as shown in fig. 3, the trip mechanism 43 includes an armature 46 and a bimetal 47, when a fault current occurs in any one of the contact loops, the armature 46 or the bimetal 47 of the contact loop can push the trip rod 45 to trigger the drawbar 1 to rotate, the operating mechanism 44 is unlocked through the traction rod 1, so that the operating mechanism 44 drives the three groups of contact circuits to be completely disconnected, the test button 2 is pressed, the traction rod 1 is driven to rotate through the test rod 3, and whether the contact circuits can be normally disconnected can be tested.

The foregoing is a more detailed description of the present invention, taken in conjunction with specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A moulded case circuit breaker, its characterized in that: including the casing and set up traction lever (1) and the contact circuit in the casing respectively, traction lever (1) are used for triggering the contact circuit and trip, are equipped with test button (2) on the casing, be equipped with test rod (3) on traction lever (1), be equipped with on the top side of test rod (3) with test button (2) complex faying surface (30), test button (2) can promote faying surface (30) of test rod (3) when being pressed to the one end of keeping away from traction lever (1) slides on faying surface (30), drive traction lever (1) through test rod (3) and rotate, faying surface (30) are equipped with spacing bump (31) that are used for spacing test button (2) in the one end of keeping away from traction lever (1).

2. The molded case circuit breaker of claim 1, wherein: the test button (2) is provided with a driving surface (20) for pushing the lapping surface (30), and the lapping surface (30) is in line contact with the driving surface (20).

3. The molded case circuit breaker of claim 1, wherein: the test button (2) is provided with a driving surface (20) used for pushing the overlapping surface (30), and the overlapping surface (30) and the driving surface (20) are obliquely arranged.

4. The molded case circuit breaker of claim 1, wherein: the test button (2) comprises a pressure lever (21) and a spring (22) connected with the pressure lever (21).

5. A molded case circuit breaker as defined in claim 4, wherein: the bottom of depression bar (21) is equipped with and is used for promoting driving face (20) of faying surface (30), driving face (20) and the length direction parallel arrangement of mould shell type circuit breaker, faying surface (30) are equipped with the one end of spacing bump (31) and upwards incline.

6. The molded case circuit breaker of claim 1, wherein: the testing rod (3) comprises two opposite side faces, the lapping face (30) is connected between the tops of the two side faces, one side face is connected with the traction rod (1), and the other side face is arranged at an interval with the traction rod (1).

7. The molded case circuit breaker of claim 6, wherein: two sides be left surface (34) and right flank (37) for being parallelogram respectively, faying face (30) are connected between the top of left surface (34) and right flank (37), are connected through oblique bottom surface (35) between the bottom of left surface (34) and right flank (37), oblique bottom surface (35) with faying face (30) parallel arrangement links to each other through leading flank (32) and trailing flank (36) respectively between the other both sides of left surface (34) and right flank (37), trailing flank (36) are close to the one end of right flank (37) and are connected with traction lever (1), and the one end that trailing flank (36) are close to left surface (34) is equipped with and dodges groove (33).

8. The molded case circuit breaker of claim 1, wherein: the shell is internally provided with an operating mechanism (44) matched with the draw bar (1), the contact loops respectively comprise a moving contact, a static contact and a tripping mechanism (43), the draw bar (1) is provided with tripping rods (45) respectively matched with the tripping mechanisms (43) of the contact loops, each tripping mechanism (43) comprises an armature (46) and a bimetallic strip (47), the armature (46) or the bimetallic strip (47) of each contact loop can respectively push the tripping rods (45) to trigger the draw bar (1) to rotate, the draw bar (1) unlocks the operating mechanism (44), and the test button (2) is pressed down to drive the draw bar (1) to rotate the unlocking operating mechanism (44) through the test rod (3).

9. A molded case circuit breaker as defined in claim 4, wherein: an operating head (23) and a driving surface (20) are respectively arranged at two ends of the pressure lever (21), a limiting structure (24) is arranged in the middle of the pressure lever (21), and the spring (22) drives the limiting structure (24) to limit the shell; the button hole-free push-button switch is characterized in that a button groove (27) is formed in the shell, a button hole used for avoiding the press rod (21) is formed in the bottom of the button groove (27), the spring (22) is sleeved on the outer side of the press rod (21), and two ends of the spring (22) are respectively abutted to the button groove (27) and the operating head (23).

10. A molded case circuit breaker as defined in claim 9, wherein: the middle part of the pressure rod (21) is provided with a shrinkage hole (25), the outer side of the pressure rod (21) corresponding to the shrinkage hole (25) is provided with an inclined leading-in surface (26), one end, close to the driving surface (20), of the leading-in surface (26) is flush with the outer side of the pressure rod (21), one end, close to the operating head (23), of the leading-in surface (26) is higher than the outer side of the pressure rod (21) to form the limiting structure (24), and after the limiting structure (24) penetrates through the button hole, the spring (22) drives the limiting structure (24) to abut against the shell for limiting.