Auxiliary device for installing plug-in busbar

Abstract

The invention relates to the technical field of plug busbar application, in particular to a plug busbar installation auxiliary device, which comprises a circuit breaker main body, a plug busbar and an auxiliary installation part for assembling a working part, and is characterized in that the auxiliary installation part comprises a bottom plate and a positioning plate, and the positioning plate is provided with a positioning groove and a receding hole; and the positioning mechanism is arranged on the bottom plate and is used for limiting the positioning plate. Before the connecting piece of the plugging busbar is locked, the positioning plate is sleeved on the outer side of the plugging busbar, then the connecting piece is locked, the two plugging busbars are limited to be in the same plane, and before the positioning plate is removed, relative fixed limiting of the positioning plate and the top plate is relieved, and the holding force between the plugging busbar and the positioning plate in the locking process of the connecting piece is eliminated. The positioning plate is taken down from the plugging busbar; the operation process is simple, the product is not damaged, and the two plugging busbars can be limited in a coplanar manner.

Description

Technical Field

[0001] The invention relates to the technical field of plug-in busbar application, and in particular to a plug-in busbar installation auxiliary device. Background Art

[0002] Drawer frame circuit breakers are widely used in low-voltage power distribution systems in factories, residential areas, and commercial centers. They consist of a main body and a drawer base. The incoming and outgoing lines of the drawer base are directly connected to the busbar of the switch cabinet, and the main body of the circuit breaker integrates all protection and breaking functions. The connection between the drawer base and the main body is through the drawer base's own rocking-in and rocking-out device, which drives the plug-in connection between the main body and the drawer base chassis. Generally, a plug-in busbar is installed on the main body, and a bridge-shaped contact is installed in the drawer base chassis. The plug-in connection between them conducts the main circuit between the circuit breaker main body and the drawer base.

[0003] The three-position (disconnect, test, connect) indication and locking function on the circuit breaker drawer facilitate the equipment commissioning, maintenance and replacement by on-site staff.

[0004] The installation of the plug-in busbar on the circuit breaker body is generally locked by multiple high-strength screws. There is no positioning between the plug-in busbar and the copper bar inside the circuit breaker body. Since a gap is reserved between the screw hole of the plug-in busbar and the locking screw, the upper and lower plug-in busbars are not on the same surface after installation, which leads to excessive driving force when the body and the drawer seat are plugged in. At the same time, the contact between the plug-in busbar and the bridge-shaped contact inside the drawer seat chassis is not ideal, which in turn affects the temperature rise effect of the circuit breaker.

[0005] A commonly used method in the technical field is to use a long U-shaped groove as an auxiliary installation tool, clamp the upper and lower plug-in busbars at the same time, then tighten the screws of the plug-in busbars, and finally remove the U-shaped groove, but this method has the following defects:

[0006] After being locked, there is a large clamping force between the plug-in busbar and the U-shaped groove. Forcible removal will leave scratches on the surface of the plug-in busbar and damage the silver-plated layer on the surface of the plug-in busbar. Summary of the invention

[0007] In view of this, the technical problem to be solved by the present invention is how to provide an auxiliary installation device that can ensure that two plug-in busbars are located on the same installation surface and will not damage the surface coating of the plug-in busbars when they are removed.

[0008] In order to solve the technical problem, a plug-in busbar installation auxiliary device is provided, comprising:

[0009] Working part, including circuit breaker body and plug-in busbar;

[0010] An auxiliary mounting part is used to assemble the working part, and the auxiliary mounting part includes a bottom plate and also includes:

[0011] A positioning plate is installed on the bottom plate, and a positioning groove and a clearance hole are provided on the positioning plate;

[0012] A positioning mechanism is arranged on the bottom plate to limit the positioning plate;

[0013] The positioning plate and the positioning mechanism are centrally symmetrically located on the bottom plate and are arranged corresponding to the plug-in busbar.

[0014] In a preferred embodiment, the plug-in busbar and the circuit breaker body are assembled through a first connecting piece, and the clearance hole is adapted to the first connecting piece.

[0015] In a preferred embodiment, a hole for accommodating the positioning plate is provided on the bottom plate, and the hole is in clearance fit with the positioning plate.

[0016] In a preferred embodiment, the positioning groove and the clearance hole are both arranged through the positioning plate, and the clearance holes are located on both sides of the positioning groove;

[0017] The outer side wall of the positioning plate is provided with a second locking protrusion.

[0018] In a preferred embodiment, the positioning mechanism comprises a mounting groove arranged on the bottom plate, and a lock catch and a return spring are arranged in the mounting groove;

[0019] The lock buckle is arranged in the installation groove through a second connecting member;

[0020] The return spring is arranged in the mounting groove through a third connecting member;

[0021] The lock buckle is provided with a first locking protrusion matched with the second locking protrusion.

[0022] In a preferred embodiment, one end of the return spring is fixed to the inner wall of the mounting groove, and the other end is fixed to the outer wall of the bottom plate;

[0023] The return spring is a torsion spring.

[0024] In a preferred embodiment, it further includes a first limiting hole, a second limiting hole and a fourth connecting member;

[0025] The first limiting hole is set through the bottom plate, and its direction is from the bottom plate to the positioning plate;

[0026] The second limiting hole is embedded in the positioning plate and corresponds to the first limiting hole.

[0027] In a preferred embodiment, the first limiting hole is set as a threaded hole, and the outer wall of the fourth connecting member is provided with an external thread matching the threaded hole;

[0028] The number of the first limiting hole, the second limiting hole and the fourth connecting member is several and distributed on the outer side of the positioning plate.

[0029] In a preferred embodiment, the positioning plate is configured as a cuboid with arc-shaped ends, and the number of the clearance holes is at least two.

[0030] In a preferred embodiment, the cross-sectional shape of the relief hole is "strip", "circle" or "ellipse".

[0031] According to the present invention, before the connector of the plug-in busbar is locked, the positioning plate is sleeved on the outside of the plug-in busbar, and then the connector is locked, that is, the two plug-in busbars are restricted to be located in the same plane, and before the positioning plate is removed, the relative fixed limit between the positioning plate and the top plate is released, the clamping force between the plug-in busbar and the positioning plate is eliminated during the locking process of the connector, and the positioning plate is removed from the plug-in busbar;

[0032] The operation process is simple, will not cause damage to the product, and can limit the coplanarity of the two plug-in busbars. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Figure 1 FIG. 1 is a first schematic diagram of a working state of an embodiment of the invention.

[0035] Figure 2 FIG. 2 is a second schematic diagram of the working state of an embodiment of the present invention.

[0036] Figure 3 This is a first structural diagram of a working portion of an embodiment of the invention.

[0037] Figure 4 This is a second structural diagram of the working part of one embodiment of the invention.

[0038] Figure 5 This is a first structural view of an auxiliary mounting portion according to an embodiment of the invention.

[0039] Figure 6 This is a second structural view of the auxiliary mounting portion of an embodiment of the invention.

[0040] Figure 7 A top view of a positioning plate according to an embodiment of the invention.

[0041] Figure 8 This is a structural view of an auxiliary mounting portion according to another embodiment of the invention.

[0042] Fig. 9 A top view of an auxiliary mounting portion according to another embodiment of the invention.

[0043] Fig.10 A partial cross-sectional view of an auxiliary mounting portion according to another embodiment of the invention. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0045] See also Figures 1 to 7 , as an embodiment of the present invention, provides a plug-in busbar installation auxiliary device, which includes:

[0046] The auxiliary installation part 200 is used to assist the staff to assemble the working part 100;

[0047] The working part 100 is configured as a drawer-type frame circuit breaker, which includes:

[0048] A circuit breaker body 101, a plug-in busbar 103 is provided on one side of the circuit breaker body 101;

[0049] Specifically, the plug-in busbar 103 and the circuit breaker body 101 are assembled through the first connecting piece 103a;

[0050] The bridge contact 102 is mounted on the bottom frame of the drawer seat;

[0051] The first connecting member 103a is a rivet, a screw or a bolt, and the first connecting member 103a is matched with the mounting hole on the main body;

[0052] Specifically, the circuit breaker body 101, the drawer seat, the bridge contact 102 and the plug-in busbar 103 included in the above-mentioned drawer-type frame circuit breaker are all derived from the existing technology. When in use, the staff assembles the plug-in busbar 103 to the circuit breaker body 101 through the first connecting piece 103a, and the circuit breaker body moves toward the direction close to the bridge contact 102 through the driving device of the drawer seat, and the plug-in busbar 103 is respectively inserted into the bridge contact 102 on the bottom frame of the drawer seat, so as to realize the electrical connection between the circuit breaker body and the main circuit of the drawer seat;

[0053] The auxiliary installation part 200 assists the staff in installing the plug-in busbar 103 and the circuit breaker body 101, including the bottom plate 201, and also includes:

[0054] The positioning plate 202 is configured in a "disc shape" and is rotatably connected to the bottom plate 201;

[0055] Specifically, the bottom plate 201 is provided with a hole for accommodating the positioning plate 202, and the hole and the positioning plate 202 are matched with a small gap;

[0056] The positioning plate 202 can lock and fix the plug-in busbar 103 when in use, and is set in a disc shape for easy rotation;

[0057] The positioning mechanism 203 is used to lock and release the rotation connection between the positioning plate 202 and the base plate 201;

[0058] That is, when the positioning mechanism 203 is in a locked state, the positioning plate 202 and the bottom plate 201 are fixed and cannot rotate, and when the positioning mechanism 203 is in a released state, the positioning plate 202 can rotate in the hole on the bottom plate 201;

[0059] There are two positioning plates 202 and two positioning mechanisms 203, which are centrally symmetrically arranged on the bottom plate 201. The two positioning plates 202 correspond to the two plug-in busbars 103 respectively.

[0060] The number of positioning plates 202 and positioning mechanisms 203 can be adjusted according to the number of plug-in busbars 103 located on the same plane, so as to adapt to different circuit breaker bodies 1;

[0061] That is, the center distance between the two positioning plates 202 on the bottom plate 201 is equal to the center distance between the two plug-in busbars 103;

[0062] Specifically, the center distance between every two adjacent positioning plates 202 is equal to the center distance between the corresponding two adjacent plug-in busbars 103;

[0063] in:

[0064] A positioning groove 202a is provided through the positioning plate 202, the positioning groove 202a is colinear with the center of the positioning plate 202, and the positioning groove 202a is adapted to the plug-in busbar 103;

[0065] Specifically, the inner contour of the positioning groove 202a is matched with the outer contour of the plug-in busbar 103 with a small gap;

[0066] When in use, the small clearance fit can achieve the limit between the positioning groove 202a and the plug-in busbar 103, overcoming the torsional force applied to the plug-in busbar 103 by the staff tightening the first connecting member 103a;

[0067] The inner wall of the positioning groove 202a is provided with a protective pad (not shown in the figure), and the protective pad is set as a rubber pad or a sponge pad, which is used to protect the coating of the outer wall of the plug busbar 103 during the installation process;

[0068] The connection method between the protective pad and the inner wall of the positioning groove 202a is generally bonding. When the protective pad is severely worn during use, the staff uses a scraper or hot melt method to remove the protective pad in the inner wall of the current positioning groove 202a and bond a new protective pad to ensure that the outer wall coating of the plug-in busbar 103 is protected;

[0069] In order for the positioning plate 202 to accurately locate the position of the plug busbar 103, the lateral gap between the positioning groove 202a and the plug busbar 103 is small, and the longitudinal gap is large, so that the positioning groove 202a is conveniently sleeved on the outside of the plug busbar 103;

[0070] Moreover, the larger longitudinal gap can also reduce the risk of damage to the plug-in busbar during installation;

[0071] The positioning plate 202 is provided with clearance holes 202b, which are arranged on both sides of the positioning groove 202a, and the clearance holes 202b are adapted to the first connecting member 103a;

[0072] Specifically, the inner diameter of the clearance hole 202b is larger than the outer diameter of the first connecting member 103a, so as to ensure that the first connecting member 103a can rotate freely in the clearance hole 202b, which is convenient for the staff to install, and the inner wall of the clearance hole 202b is a polished surface;

[0073] The outer edge of the positioning plate 202 is provided with a second locking protrusion 202c, which cooperates with the positioning mechanism 203 to lock and limit the positioning plate 202;

[0074] Wherein: the positioning mechanism 203 comprises:

[0075] The mounting groove 203c is embedded in the end surface of the bottom plate 201 and is located between the two positioning plates 202;

[0076] Specifically, the mounting groove 203c is connected to the circular hole for accommodating the positioning plate 202, so as to provide a rotation space for the positioning plate 202 and the second positioning protrusion 202c on the bottom plate 201;

[0077] The lock buckle 203a is rotatably disposed in the installation groove 203c through the second connecting member 203a-2 (the second connecting member 203a-2 is a screw or a rivet);

[0078] Specifically, a first locking protrusion 203a-1 is provided on one side of the lock buckle 203a, and the first locking protrusion 203a-1 is matched with the second locking protrusion 202c;

[0079] That is, the lock buckle 203a locks and limits the positioning plate 202 through the first locking protrusion 203a-1 included therein and the second locking protrusion 202c on the positioning plate 202, thereby achieving relative fixation of the positioning plate 202 and the bottom plate 201;

[0080] The return spring 203b is arranged in the installation groove 203c through the third connecting member 203b-1 (the third connecting member 203b-1 is a screw or a rivet);

[0081] That is, the return spring 203b is located outside the third connecting member 203b-1, and the third connecting member 203b-1 is press-fitted on the return spring 203b;

[0082] Specifically, one end of the return spring 203b is fixed to the inner wall of the mounting groove 203c, and the other end is fixed to the outer wall of the lock buckle 203a;

[0083] That is, the lock catch 203a is elastically disposed in the mounting groove 203c on the bottom plate 201 through the return spring 203b;

[0084] More specifically, the return spring 203b is a torsion spring, a torsion bar spring or a torsion spring, and its structure is that the two ends of the column spring are extended linearly and are arranged at an angle (this angle is set according to the distance between the outer wall of the lock buckle 203a and the inner wall of the installation groove 203c);

[0085] After the lock 203a is unlocked, the return spring 203b can automatically rebound without the need for additional operations by the staff;

[0086] During use, based on the setting of the first locking protrusion 203a-1, the return spring 203b and the second locking protrusion 202c, the assembly process can be simplified. After the staff tightens the first connecting piece 103a, they can quickly release the positioning plate by releasing the locking of the first locking protrusion 203a-1 and the second locking protrusion 202c, thereby facilitating the removal of the auxiliary mounting part 200.

[0087] Directions:

[0088] S1, the staff places the plug-in busbar 103 on the circuit breaker body 101, and sets the auxiliary installation part 200 (the two positioning grooves 202a on the two positioning plates 202 included in the auxiliary installation part 200 are respectively set on the outside of the two plug-in busbars 103) on the outside of the two plug-in busbars 103;

[0089] After the plug-in busbar 103 is assembled to the circuit breaker body 101 and before the first connecting piece 103a is locked, the plug-in busbar 103 still has three degrees of freedom of displacement, namely, movement in the left-right, up-down directions, and rotation perpendicular to the axis of the installation surface of the plug-in busbar 103. When the two positioning plates 202 are sleeved on the outside of the plug-in busbar 103, the degree of freedom of the plug-in busbar 103 in the left-right direction is restricted, the degree of freedom in the up-down direction does not need to be restricted, and the remaining degree of freedom of rotation perpendicular to the axis of the installation surface of the plug-in busbar 103 needs to be further restricted;

[0090] S2, move the lock buckle 203a, so that the first locking protrusion 203a-1 on the lock buckle 203a is engaged with the second locking protrusion 202c on the positioning plate 202, thereby completing the relative fixation of the positioning plate 202 and the bottom plate 201;

[0091] In the general installation process (without special requirements), right-handed screws are used. Therefore, when the plug-in busbar 103 is locked, it will be driven by the locking screws and rotate clockwise as a whole. In this case, the two positioning plates 202 are fixed to the bottom plate 201 through the second locking protrusion 202c and the first locking protrusion 203a-1, limiting the clockwise rotation of the positioning plates 202;

[0092] Based on this, the two plug-in busbars 103 remove one unrestricted vertical degree of freedom, and the remaining degrees of freedom are restricted by the positioning plate 202, so that the two plug-in busbars 103 can be installed in the same plane;

[0093] S3, pass the first connecting member 103a through the clearance hole 202b, screw it into the installation hole of the plug-in busbar 103 reserved on the circuit breaker body 101, tighten the first connecting frame, and complete the fixation of the plug-in busbar 103 and the circuit breaker body 101;

[0094] When the locking screws of the plug-in busbar 103 are tightened, a certain clamping force is formed between the plug-in busbar 103 and the positioning plate 202;

[0095] S4, toggle the lock buckle 203a to release the first locking protrusion 203a-1 and the second locking protrusion 202c in the locking connection, release the positioning plate 202 and the bottom plate 201, and remove the bottom plate 201 and the positioning plate 202;

[0096] The positioning plate 202 regains the freedom of rotation direction, that is, the clamping force between the plug-in busbar 103 and the positioning plate 202 disappears, and the positioning plate 202 can be removed from the plug-in busbar 103 without causing any damage to the plug-in busbar 103 .

[0097] See also Figures 8 to 10 , which is another embodiment of the present invention, different from the above-mentioned embodiment, includes a limiting mechanism 204, and the positioning plate 202 and the bottom plate 201 are detachably connected, and a through slot for installing the positioning plate 202 is provided on the bottom plate 201. The function of the limiting mechanism 204 is to change the connection mode between the positioning plate 202 and the bottom plate 201, so as to obtain different usage modes and application scopes. The limiting mechanism 204 includes:

[0098] A first limiting hole 204b is provided through the bottom plate 201;

[0099] Specifically, the first limiting hole 204b is set as a threaded hole, which points from the outer wall of the bottom plate 201 to the outer wall of the positioning plate 202;

[0100] The second limiting hole 204c is embedded in the positioning plate 202;

[0101] Specifically, the second limiting hole 204c is set as a blind hole, and the cross-sectional shape is "circular, elliptical, rectangular", and its direction is located on the extended axis line of the first limiting hole 204b;

[0102] When in use, the second limiting holes 204c with different cross-sectional shapes are provided to accommodate different fourth connecting members 204a, thereby improving the applicable range of the auxiliary mounting portion 200;

[0103] The fourth connecting member 204a (the fourth connecting member 204a is a screw or a bolt) is arranged in a columnar shape and an outer wall at one end thereof is provided with an external thread matching the threaded hole;

[0104] Specifically, the fourth connecting member 204a passes through the first limiting hole 204b and the second limiting hole 204c and is threadedly assembled with the first limiting hole 204b;

[0105] The number of the first limiting hole 204 b , the second limiting hole 204 c and the fourth connecting member 204 a corresponds to each other, and they are all set to be a plurality and distributed on the outer side of the positioning plate 202 .

[0106] When in use, the positioning plate 202 and the bottom plate 201 included in this embodiment are detachably connected, and the installation positions of the positioning plate 202 and the bottom plate 201 can be adjusted based on the different positions of the plug-in busbars 103 on different circuit breaker bodies 101.

[0107] In summary, based on the different relative distances between the plug-in busbars 103 on different circuit breaker bodies 101, the staff can adjust the distance between the two positioning plates 202 to be suitable for different circuit breaker bodies 101, thereby improving the scope of application of the present invention.

[0108] See also Figures 8 to 10 , which is another embodiment of the present invention, different from the above-mentioned embodiment, wherein:

[0109] The positioning plate 202 is configured as a rectangular parallelepiped and its two ends are configured as arcs;

[0110] The clearance holes 202b are arranged on both sides of the positioning groove 202a, and the number is several;

[0111] Specifically, at least one of the clearance holes 202b is adapted to the first connector 103a, ensuring that the first connector 103a can pass through the clearance hole 202b and assemble the plug-in busbar 103, and the clearance hole 202b is configured as a strip hole, a round hole or an elliptical hole;

[0112] More specifically, the clearance hole 202b corresponding to the second limiting hole 204c is communicated with the second limiting hole 204c.

[0113] When in use, except for the clearance hole 202b corresponding to the first connecting piece 103a, the other clearance holes 202b are used as stealing holes and reinforcement holes, which reduce the mass of the positioning plate 202 and increase the structural strength of the positioning plate 202, making it convenient for workers to move and install while reducing metal fatigue. In addition, the rectangular positioning plate 202 with arcs at both ends can reduce the stress on the first locking protrusion 203a-1 and the second locking protrusion 202c compared to the aforementioned embodiment, thereby improving the service life of the positioning mechanism 203 and the positioning plate 202.

[0114] Compared with the prior art, the present invention has the following characteristics:

[0115] Before locking the connector of the plug-in busbar 103, the positioning plate 202 is sleeved on the outside of the plug-in busbar 103, and then the connector is locked, that is, the two plug-in busbars 103 are limited to be located in the same plane. Before removing the positioning plate 202, the relative fixed limit between the positioning plate 202 and the top plate is released to eliminate the clamping force between the plug-in busbar 103 and the positioning plate 202 during the locking process of the connector, and the positioning plate 202 is removed from the plug-in busbar 103;

[0116] The operation process is simple, will not cause damage to the product, and can limit the coplanar position of the two plug-in busbars 103 .

[0117] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A plug-in busbar installation auxiliary device, characterized in that: include: The working part (100) comprises a circuit breaker body (101) and a plug-in busbar (103); The auxiliary installation part (200) is used to assemble the working part (100), and the auxiliary installation part (200) comprises a bottom plate (201), a positioning plate (202) and a positioning mechanism (203).

2. A plug-in busbar installation auxiliary device as claimed in claim 1, characterized in that: The positioning plate (202) is installed on the bottom plate (201), and the positioning plate (202) is provided with a positioning groove (202a) and a clearance hole (202b); The positioning mechanism (203) is arranged on the bottom plate (201) to limit the position of the positioning plate (202); The positioning plate (202) and the positioning mechanism (203) are centrally symmetrically located on the bottom plate (201) and are arranged corresponding to the plug-in busbar (103).

3. A plug-in busbar installation auxiliary device as claimed in claim 2, characterized in that: The bottom plate (201) is provided with a hole for accommodating the positioning plate (202), and the hole and the positioning plate (202) are clearance-matched.

4. A plug-in busbar installation auxiliary device as claimed in claim 2, characterized in that: The positioning groove (202a) and the clearance hole (202b) are both arranged through the positioning plate (202); The outer side wall of the positioning plate (202) is provided with a second locking protrusion (202c).

5. A plug-in busbar installation auxiliary device as claimed in claim 4, characterized in that: The positioning mechanism (203) comprises a mounting groove (203c) arranged on the bottom plate (201), and a lock buckle (203a) and a return spring (203b) are arranged in the mounting groove (203c); The lock buckle (203a) is provided with a first locking protrusion (203a-1).

6. A plug-in busbar installation auxiliary device as claimed in claim 5, characterized in that: One end of the return spring (203b) is fixed to the inner wall of the installation groove (203c), and the other end is fixed to the outer wall of the bottom plate (201).

7. The plug-in busbar installation auxiliary device according to claim 1, characterized in that: It also includes a limiting mechanism (204), wherein the limiting mechanism (204) includes a fourth connecting member (204a), a first limiting hole (204b), and a second limiting hole (204c); The first limiting hole (204b) is arranged through the bottom plate (201); The second limiting hole (204c) is embedded in the positioning plate (202) and corresponds to the first limiting hole (204b).

8. A plug-in busbar installation auxiliary device as claimed in claim 7, characterized in that: The first limiting hole (204b) is configured as a threaded hole, and the outer wall of the fourth connecting member (204a) is provided with an external thread.

9. The plug-in busbar installation auxiliary device according to claim 2, characterized in that: The positioning plate (202) is configured as a rectangular parallelepiped with arc-shaped ends, and the number of the clearance holes (202b) is at least two.

10. A plug-in busbar installation auxiliary device as claimed in claim 9, characterized in that: The cross-sectional shape of the clearance hole (202b) is "strip", "circle" or "ellipse"; The plug-in busbar (103) and the circuit breaker body (101) are assembled via a first connecting piece (103a).

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