Drawer seat for preventing loosening of bridge contacts

Abstract

The utility model discloses a drawer seat of preventing bridge type contact to loosen belongs to circuit breaker technical field, including drawer seat body, the inner chamber bolt of drawer seat body has the base, the surface of base is equipped with the mounting chamber for installing contact and is seted up, the inner chamber of mounting chamber is equipped with the limit slot for limiting bridge type contact up and down direction limit and is seted up symmetrically, the inner chamber of mounting chamber still installs the contact subassembly for preventing bridge type contact to loosen, the inner chamber of limit slot is clamped into the both sides of contact subassembly, contact subassembly includes bridge type contact body and the external connection busbar that is connected with bridge type contact, the inner chamber connection of external connection busbar and mounting chamber, avoid assembling and bridge type contact to appear position deviation and the phenomenon of loosening through above -mentioned scheme, when the busbar can be clamped into bridge type contact to make circuit breaker shake into drawer seat, avoid using process and appear burnout phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a drawer seat for preventing bridge-type contacts from loosening. Background Technology

[0002] The DW45 intelligent universal circuit breaker is an air circuit breaker independently developed in my country in the 1990s. It has relatively complete protection functions, accurate protection operating current, and a high degree of intelligence. The rated operating voltage can reach up to AC690V / 50Hz. It is mainly used in power distribution networks to distribute electrical energy and protect lines and power equipment from overload, short circuit and undervoltage. It can also be used to protect motors from overload, short circuit and undervoltage.

[0003] Currently, the bridge contacts of drawer-type intelligent universal circuit breakers are generally directly snapped into the external busbar. There is no design to prevent the bridge contacts from loosening in the vertical direction. If the assembly is not in place, the bridge contacts may shift or even loosen, preventing the busbar from snapping into the bridge contacts when the circuit breaker body is slid into the drawer seat. This can lead to the circuit breaker burning out during use due to the poor connection between the bridge contacts and the busbar. Therefore, we need to propose a drawer seat that prevents the bridge contacts from loosening. Utility Model Content

[0004] The purpose of this invention is to provide a drawer seat that prevents bridge-type contacts from loosening. By setting a limiting groove, the vertical direction of the bridge-type contacts after installation can be restricted. By setting the contact assembly, the positional deviation of the bridge-type contacts is avoided, thus preventing them from loosening and improving the stability of the bridge-type contacts within the limiting groove. The above solution avoids positional deviation and loosening of the bridge-type contacts during assembly, allowing the busbar to engage with the bridge-type contacts when the circuit breaker is pushed into the drawer seat, preventing burnout during use, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drawer seat for preventing bridge-type contacts from loosening, comprising a drawer seat body, a base bolted to the inner cavity of the drawer seat body, an installation chamber for installing contacts on the surface of the base, symmetrically provided limiting grooves for limiting the vertical movement of the bridge-type contacts within the inner cavity of the installation chamber, and a contact assembly for preventing the bridge-type contacts from loosening installed within the inner cavity of the installation chamber, the two sides of the contact assembly being engaged with the inner cavity of the limiting grooves, the contact assembly comprising a bridge-type contact body and an external busbar connected to the bridge-type contact, the external busbar being connected to the inner cavity of the installation chamber.

[0006] Preferably, the bridge-type contact body includes a bridge-type contact piece, a first retaining plate, a second retaining plate, a tension spring, and a shaft. The bridge-type contact pieces are provided in several groups, and the several groups of bridge-type contact pieces are fixed by the cooperation of the first retaining plate, the second retaining plate, the tension spring, and the shaft.

[0007] Preferably, both sides of the first clamping plate are integrally formed with limiting angle one, the inner sidewall of the limiting angle one is attached to the surface of the external busbar, both sides of the second clamping plate are integrally formed with limiting angle two, and the limiting angle two is U-shaped, the outer sidewall of the limiting angle two is engaged with the inner cavity of the limiting groove.

[0008] Preferably, the first limiting angle is T-shaped, and a connecting hole is provided at the connection between the second clamping plate and the second limiting angle, wherein the inner cavity of the connecting hole engages with the surface of the first limiting angle.

[0009] Preferably, the tension spring is located in the inner cavity of the bridge-shaped contact piece, and the shaft is located at the top and bottom of the bridge-shaped contact piece.

[0010] Preferably, the surface of the external busbar is bolted with a fixing angle plate, the fixing angle plate is L-shaped, the other end of the fixing angle plate is bolted to the inner cavity of the base, and two sets of fixing angle plates are provided, and the two sets of fixing angle plates are symmetrically distributed at both ends of the external busbar.

[0011] Preferably, the installation chambers are provided in several groups, and the several groups of installation chambers are arranged at equal distances on the base.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model provides a drawer seat to prevent bridge-type contacts from loosening. By setting a limiting groove, the vertical direction of the bridge-type contacts is restricted after installation. By setting the contact assembly, the position of the bridge-type contacts is prevented from shifting, thus preventing them from loosening and improving the stability of the bridge-type contacts within the limiting groove. The above solution avoids position shifting and loosening of the bridge-type contacts during assembly, allowing the busbar to be engaged with the bridge-type contacts when the circuit breaker is pushed into the drawer seat, preventing burnout during use.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a structural diagram of the disassembled bridge-type contact body of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the base disassembly contact assembly of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the base of this utility model;

[0019] Figure 5 This is a schematic diagram of the contact assembly of this utility model;

[0020] Figure 6 This is a structural diagram showing the disassembled contact assembly of this utility model.

[0021] In the diagram: 1. Drawer seat body; 2. Contact assembly; 21. Bridge-type contact body; 211. Bridge-type contact piece; 212. Clamping plate one; 213. Clamping plate two; 214. Tension spring; 215. Shaft; 216. Limiting angle one; 217. Limiting angle two; 22. External busbar; 23. Fixing angle plate; 3. Base; 4. Mounting chamber; 5. Limiting groove; 6. Connection hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 This utility model provides a drawer seat for preventing bridge-type contacts from loosening, including a drawer seat body 1, a base 3 bolted to the inner cavity of the drawer seat body 1, an installation chamber 4 for installing contacts on the surface of the base 3, and symmetrically provided limiting grooves 5 for limiting the vertical movement of the bridge-type contacts in the inner cavity of the installation chamber 4. The inner cavity of the installation chamber 4 is also equipped with a contact assembly 2 for preventing the bridge-type contacts from loosening. The two sides of the contact assembly 2 are inserted into the inner cavity of the limiting grooves 5. The contact assembly 2 includes a bridge-type contact body 21 and an external busbar 22 connected to the bridge-type contact. The external busbar 22 is connected to the inner cavity of the installation chamber 4.

[0024] In use, first, take the base 3 and fix it to the drawer seat body 1 with bolts. Then, assemble the bridge contact body 21 with the external busbar 22 and install the external busbar 22 in the installation chamber 4 to realize the assembly between the contact assembly 2 and the installation chamber 4. After assembly, both ends of the contact assembly 2 are just stuck in the limiting groove 5. Finally, the circuit breaker body can be inserted into the installation chamber 4 and connected to the bridge contact body 21. The limiting groove 5 restricts the up and down direction of the bridge contact. The cooperation between the contact assembly 2 and the limiting groove 5 can prevent the position of the bridge contact from shifting and prevent the bridge contact from loosening, thus improving the stability of the bridge contact in the limiting groove 5. The above scheme avoids the phenomenon of position shifting and loosening of the bridge contact during assembly, so that the busbar can be locked into the bridge contact when the circuit breaker is pushed into the drawer seat, thus preventing the phenomenon of burning during use.

[0025] The bridge-type contact body 21 includes a bridge-type contact piece 211, a first retaining plate 212, a second retaining plate 213, a tension spring 214, and a shaft 215. Several sets of bridge-type contact pieces 211 are provided, and these sets are fixed together by the first retaining plate 212, the second retaining plate 213, the tension spring 214, and the shaft 215. These sets of bridge-type contact pieces 211 serve as the core conductive components, positioned by the first retaining plate 212 and the second retaining plate 213, and fixed through the shaft 215. Then, with the help of the elastic tension of the tension spring 214, multiple sets of contact pieces are compactly aggregated to form a complete bridge-type contact body 21, realizing the coordinated fixation of multiple contact pieces. The combination of multiple sets of bridge-type contact pieces 211 improves conductivity and current carrying capacity. The coordinated cooperation of the first clamping plate 212, the second clamping plate 213, the shaft 215 and the tension spring 214 prevents the displacement or loosening of a single set of contact pieces, ensuring the structural integrity of the bridge-type contact body 21, and laying the core foundation for subsequent anti-loosening and stable conductivity.

[0026] Both sides of the first clamping plate 212 are integrally formed with limiting angle 216. The inner sidewall of limiting angle 216 is attached to the surface of the external busbar 22. Both sides of the second clamping plate 213 are integrally formed with limiting angle 217, and the limiting angle 217 is U-shaped. The outer sidewall of limiting angle 217 is engaged with the inner cavity of the limiting groove 5. The limiting angle 216 is attached to the external busbar 22 through the inner sidewall, realizing the tight positioning of the bridge contact body 21 and the external busbar 22, ensuring the reliability of conductive contact and avoiding poor contact. The U-shaped limiting angle 217 of the second clamping plate 213 is engaged with the limiting groove 5 through the outer sidewall, adding lateral limiting on the basis of upper and lower limiting, forming multi-directional constraint, which, together with the upper and lower limiting, realizes all-round limiting. The integrally formed limiting angle structure has high strength, further blocking the loosening path of the contact assembly 2.

[0027] The limiting angle 216 is T-shaped. A connecting hole 6 is provided at the connection between the second clamping plate 213 and the second limiting angle 217. The inner cavity of the connecting hole 6 fits and engages with the surface of the first limiting angle 216. The T-shaped limiting angle 216 is inserted into the connecting hole 6 of the second clamping plate 213, forming a mechanical engagement between the first clamping plate 212 and the second clamping plate 213. This allows both plates to fix the contact piece while simultaneously locking themselves in place, forming an auxiliary fixing structure with interlocking clamps. This improves the connection strength between the first clamping plate 212 and the second clamping plate 213, prevents relative displacement, and ensures the overall stability of the contact body. The engagement method eliminates the need for additional fasteners, simplifies the assembly process, enhances the structure's vibration resistance, and indirectly improves the anti-loosening effect.

[0028] The tension spring 214 is located in the inner cavity of the bridge-type contact piece 211, and the shaft 215 is located at the top and bottom of the bridge-type contact piece 211. The tension spring 214 is built into the inner cavity of the bridge-type contact piece 211 without occupying extra space. It continuously provides axial elastic tension, which can counteract vibration and relaxation during long-term use, keeping multiple sets of contact pieces in a tight and close fit. The shaft 215 at both ends is positioned to prevent axial displacement of the contact pieces, prevent loosening of the connection or poor contact caused by movement, and extend the service life of the contact assembly 2.

[0029] The surface of the external busbar 22 is bolted with fixing angle plates 23. The fixing angle plates 23 are L-shaped. The other end of the fixing angle plates 23 is bolted to the inner cavity of the base 3. There are two sets of fixing angle plates 23, and the two sets of fixing angle plates 23 are symmetrically distributed at both ends of the external busbar 22. The two sets of symmetrically distributed fixing angle plates 23 ensure balanced force and prevent the external busbar 22 from shifting or loosening. By fixing the external busbar 22, the bridge-type contacts are indirectly fixed, forming a secondary fixing protection, which greatly reduces the probability of the contact assembly 2 becoming loose as a whole.

[0030] The mounting chamber 4 is provided in several sets, and these sets of mounting chambers 4 are arranged at equal distances on the base 3. The several sets of equally spaced mounting chambers 4 provide independent installation positions for multiple sets of contact assemblies 2, so that each set of contact assemblies 2 is assembled in its own dedicated mounting chamber 4, ensuring assembly consistency and facilitating later maintenance and replacement. At the same time, the multiple sets of mounting chambers 4 expand the number of conductive circuits of the product, improve the applicable scenarios, and the independent installation space avoids mutual interference between the sets of contact assemblies 2, prevents the loosening of one set from affecting other components, and improves the overall reliability and safety of use.

[0031] In practical use: First, take the base 3 and fix it to the drawer seat body 1 with bolts. Then, take several sets of bridge-type contact pieces 211 and perform preliminary assembly with the tension spring 214 and shaft 215. Next, take the first clamping plate 212 and the second clamping plate 213 and combine them. After the limiting angle 216 on the first clamping plate 212 passes through the connecting hole 6, the assembly between the first clamping plate 212 and the second clamping plate 213 is realized. The combined first clamping plate 212 and the second clamping plate 213 are then snapped into the assembled sets of bridge-type contact pieces 211 to form the bridge-type contact body 21. Take the bridge-type contact body 21 and snap it into the external busbar 22. After snapping it into place, the inner limit angle 216 at both ends of the first clamping plate 212... The side wall fits perfectly against the surface of the external busbar 22. Then, the assembled external busbar 22 is taken out and assembled with the installation chamber 4. The limiting angles 217 on both sides are inserted into the inner cavity of the limiting groove 5. After assembly, the positions of the mounting holes on the two sets of fixing angle plates 23 are aligned with the positions of the threaded holes in the installation chamber 4. Then, the fixing angle plates 23 are bolted into the installation chamber 4. Finally, the circuit breaker body is taken out and inserted into the installation chamber 4 to connect with the bridge contact body 21. The above scheme avoids the phenomenon of positional displacement and loosening of the bridge contact during assembly, so that the busbar can be inserted into the bridge contact when the circuit breaker is pushed into the drawer seat, avoiding the phenomenon of burning during use.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drawer seat for preventing bridge-type contacts from loosening, characterized in that, It includes a drawer base body (1) and a contact assembly (2) for preventing the bridge-type contacts from loosening; The inner cavity of the drawer seat body (1) is connected to a base (3). The surface of the base (3) is provided with an installation chamber (4) for installing contacts. The inner cavity of the installation chamber (4) is symmetrically provided with a limiting groove (5) for limiting the vertical movement of the bridge-type contacts. The inner cavity of the limiting groove (5) is engaged with both sides of the contact assembly (2). The contact assembly (2) includes a bridge-type contact body (21) and an external busbar (22) connected to the bridge-type contact, and the external busbar (22) is connected to the inner cavity of the mounting chamber (4).

2. A drawer seat for preventing bridge-type contacts from loosening according to claim 1, characterized in that: The bridge-type contact body (21) includes a bridge-type contact piece (211), a first retaining plate (212), a second retaining plate (213), a tension spring (214), and a shaft (215). Several sets of bridge-type contact pieces (211) are provided, and the several sets of bridge-type contact pieces (211) are fixed by the cooperation of the first retaining plate (212), the second retaining plate (213), the tension spring (214), and the shaft (215).

3. A drawer seat for preventing bridge-type contacts from loosening according to claim 2, characterized in that: Both sides of the card plate (212) are integrally formed with a limiting angle (216), and the inner sidewall of the limiting angle (216) is attached to the surface of the external busbar (22). Both sides of the card plate two (213) are integrally formed with limiting angle two (217), and the limiting angle two (217) is U-shaped. The outer wall of the limiting angle two (217) is engaged with the inner cavity of the limiting groove (5).

4. A drawer seat for preventing bridge-type contacts from loosening according to claim 3, characterized in that: A connecting hole (6) is provided at the connection between the second card plate (213) and the second limiting angle (217). The inner cavity of the connecting hole (6) is engaged with the surface of the first limiting angle (216), and the first limiting angle (216) is T-shaped.

5. A drawer seat for preventing bridge-type contacts from loosening according to claim 2, characterized in that: The tension spring (214) is located in the inner cavity of the bridge-type contact piece (211), and the shaft (215) is located at the top and bottom of the bridge-type contact piece (211).

6. A drawer seat for preventing bridge-type contacts from loosening according to claim 1, characterized in that: The surface of the external busbar (22) is connected to a fixing angle plate (23). The fixing angle plate (23) is L-shaped. The other end of the fixing angle plate (23) is connected to the inner cavity of the base (3). There are two sets of fixing angle plates (23), and the two sets of fixing angle plates (23) are symmetrically distributed at both ends of the external busbar (22).

7. A drawer seat for preventing bridge-type contacts from loosening according to claim 1, characterized in that: The installation chamber (4) is provided in several groups, and the several groups of installation chambers (4) are arranged at equal distances on the base (3).

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