Static contact seat connecting structure of three-position switch

Abstract

The utility model discloses a static contact seat connecting structure of a three-position switch, which is arranged on a supporting beam, a contact seat comprises a contact and a connecting part, the connecting part is inserted in an inserting hole of the supporting beam, a pressure equalizing plate presses the contact seat on the supporting beam, the contact penetrates out of a penetrating hole of the pressure equalizing plate, and the pressure equalizing plate is fixed on the supporting beam. According to the utility model, the contact seat is directly inserted into the supporting beam in an inserting manner and is pressed and fixed through the pressure equalizing plate, so that on one hand, the problem of resistance increase caused by piece-to-piece transmission is eliminated, and the loss in the current transmission process is reduced; on the other hand, the assembling procedure is simplified, the contact seat is fixed in a pressing mode of the pressure equalizing plate, and the contact seat is adjusted only by adjusting the corresponding pressure equalizing plate, so that the time and the cost are saved; and the contact seat is pressed and fixed through the pressure equalizing plate, so that the fracture distance is increased, and the withstand voltage of the fracture is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a static contact seat connection structure of a three-position switch. Background Art

[0002] A three-position switch used in power / electrical systems usually includes a body frame, an isolation spindle, a support assembly, an isolation knife, contacts, etc.

[0003] In the prior art, the static contact base connection structure of a three-position switch typically involves embedding a conductive insert into the support beam of the support assembly, and then securing the contacts to the insert with fasteners. This approach, on the one hand, creates a high resistance between the contact surface of the insert and the contacts, increasing current losses during transmission. On the other hand, the insert must first be fixed to the support beam before the contacts are secured to the insert. Contact base adjustment is constrained by insert size, which in turn requires modifications to the support beam mold, consuming significant time and effort. Furthermore, the addition of a voltage-equalizing shield to the contact base increases its size, reducing the fracture distance and impacting the fracture withstand voltage. Utility Model Content

[0004] In response to the shortcomings of the above-mentioned existing static contact seat connection structure of the three-position switch, the applicant provides a rationally structured static contact seat connection structure for a three-position switch. The contacts are directly inserted into the support beam and then pressed by the equalizing plate, which reduces current loss, simplifies assembly, and has higher versatility.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A static contact seat connection structure of a three-position switch is arranged on a support beam. The contact seat includes a contact and a connecting part. The connecting part is inserted into the insertion hole of the support beam. The equalizing plate presses the contact seat onto the support beam. The contact passes through the outlet hole of the equalizing plate. The equalizing plate is fixed to the support beam.

[0007] As a further improvement of the above technical solution:

[0008] An axial positioning structure is provided between the contact seat and the support beam.

[0009] A first countersunk hole is provided on the insertion hole of the support beam, forming a first step surface in the insertion hole; the connecting part of the contact seat is provided with a first column part and a second column part, and an axial positioning surface is provided at the bottom of the first column part, and the axial positioning surface cooperates with the first step surface of the insertion hole to form an axial positioning structure; or the bottom surface of the contact cooperates with the first step surface of the insertion hole to form an axial positioning structure.

[0010] A circumferential positioning structure is provided between the contact seat and the support beam.

[0011] A first flat square plane is provided on the inner wall surface of the insertion hole of the support beam, and a second flat square plane is correspondingly provided on the connecting portion of the contact seat. The second flat square plane cooperates with the first flat square plane to form a circumferential positioning structure.

[0012] A press-fitting hole is provided on the pressure-equalizing plate, and a third step surface is formed between the press-fitting hole and the through hole. The press-fitting hole corresponds to the upper part of the first column portion of the contact seat, and the third step surface is pressed tightly onto the top surface of the first column portion.

[0013] A circumferential positioning structure is provided between the pressure equalizing plate and the contact seat.

[0014] A fourth flat square plane is provided on the press-fitting hole of the pressure equalizing plate, and the fourth flat square plane cooperates with the second flat square plane to form a circumferential positioning structure; or a third flat square plane is opened on the first column portion of the contact seat, and the fourth flat square plane cooperates with the third flat square plane to form a circumferential positioning structure.

[0015] The contact of the contact seat is a flat sheet structure, and the through hole of the equalizing plate is a corresponding flat long hole.

[0016] The pressure equalizing plate is fixedly connected to the first mounting hole of the support beam by a fastener, and the nut connected to the fastener is placed in the first mounting hole; a second mounting hole is opened on the pressure equalizing plate corresponding to the fastener, and a second countersunk hole is opened on the upper part of the second mounting hole. The fastener passes through the second mounting hole, and the head of the fastener sinks into the second countersunk hole.

[0017] The beneficial effects of the utility model are as follows:

[0018] The contact seat of the utility model is directly inserted into the support beam by plug-in and is fixed by pressing with an equalizing plate. On the one hand, the problem of increased resistance caused by the transmission between parts is eliminated, and the loss during the current transmission process is reduced; on the other hand, the assembly procedure is simplified. The contact seat is fixed by pressing with an equalizing plate, and the adjustment of the contact seat only requires adjusting the corresponding equalizing plate, which saves time and cost; and the contact seat is fixed by pressing with an equalizing plate, which increases the fracture distance and improves the fracture withstand voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the support assembly using the present utility model.

[0020] Figure 2 for Figure 1 sectional view of .

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0022] Figure 4 Schematic diagram of the support beam structure.

[0023] Figure 5It is a schematic diagram of the structure of the contact seat.

[0024] Figure 6 It is a structural diagram of the pressure equalizing plate.

[0025] In the figure: 1. partition; 2. support beam; 21. insertion hole; 211. first countersunk hole; 212. first step surface; 213. first flat square plane; 22. first mounting hole; 3. contact seat; 31. contact; 32. connecting part; 321. first column; 322. second column; 323. second flat square plane; 324. third flat square plane; 325. second step surface; 4. equalizing plate; 41. through hole; 42. press-fit hole; 421. fourth flat square plane; 43. third step surface; 44. second mounting hole; 441. second countersunk hole; 5. fastener; 6. nut. DETAILED DESCRIPTION

[0026] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0027] like Figure 1 、 Figure 2 As shown, the contact seat structure of the present invention is installed on a support assembly. A support beam 2 is placed horizontally between two vertical partitions 1 of the support assembly. Several groups of contact seat structures are arranged at intervals on the support beam 2. Each group of contact seat structures includes a contact seat 3 and a pressure equalizing plate 4. The contact seat 3 is inserted into the support beam 2. The pressure equalizing plate 4 presses the contact seat 3 against the support beam 2. The pressure equalizing plate 4 is fixed to the support beam 2 via fasteners 5.

[0028] like Figure 4 As shown, the support beam 2 has an insertion hole 21 corresponding to the contact holder 3 and a first mounting hole 22 corresponding to the fastener 5. The contact holder 3 is inserted into the insertion hole 21, and the fastener 5 is connected to the first mounting hole 22. The nut 6 connected to the fastener 5 is placed in the first mounting hole 22 to ensure connection reliability. The insertion hole 21 has a first countersunk hole 211, forming a first stepped surface 212 within the insertion hole 21. First flat square surfaces 213 are provided on the inner walls of the insertion hole 21 on opposite sides.

[0029] like Figure 5As shown, the contact seat 3 is an integrated structure, including an upper contact 31 and a lower connecting portion 32. The contact 31 is a flat sheet structure, and the connecting portion 32 is a cylindrical structure. The thickness of the contact 31 is smaller than the outer diameter of the cylinder of the connecting portion 32. The connecting portion 32 includes an upper first column 321 and a lower second column 322. The outer diameter of the first column 321 is larger than the outer diameter of the second column 322. The bottom surface of the first column 321 constitutes an axial positioning surface, which is pressed against the first step surface 212 of the insertion hole 21 to axially position the contact seat 3. In other embodiments, the outer diameters of the first column 321 and the second column 322 may also be the same. In this case, the bottom surface of the contact 31 is used as the axial positioning surface, and the bottom surface of the contact 31 is pressed against the first step surface 212 of the insertion hole 21 to axially position the contact seat 3. A second flat square plane 323 is provided on opposite sides of the first column 321; as shown Figure 3 As shown, the second flat square surface 323 mates with the first flat square surface 213 of the support beam 2. The second flat square surface 323 and the first flat square surface 213 cooperate to form a circumferential positioning structure, positioning the contact holder 3 and ensuring that the contact 31 meets the required installation angle. A corresponding notch is provided on the upper portion of the first column 321, on the same side as the second flat square surface 323. A third flat square surface 324 and a second stepped surface 325 are formed above the second flat square surface 323. In other embodiments, the first column 321 may not have a notch, and the second flat square surface 323 may extend along the entire axial length of the side surface of the first column 321. Specifically, only the second flat square surface 323 (without the third flat square surface 324 and the second stepped surface 325) may be provided on opposite sides of the first column 321.

[0030] like Figure 3 、 Figure 6 As shown, a through hole 41 and a press-fit hole 42 are provided on the pressure-equalizing plate 4 in correspondence with the contact seat 3, and a third step surface 43 is formed between the press-fit hole 42 and the through hole 41; the through hole 41 is a flat and long hole, corresponding to the contact 31, and the contact 31 passes through the through hole 41; the press-fit hole 42 is corresponding to the upper part of the first column 321 of the connecting part 32, and the third step surface 43 is pressed tightly onto the top surface of the first column 321; a fourth flat square plane 421 is provided on the inner wall surfaces on opposite sides of the press-fit hole 42, as shown in FIG. Figure 3As shown, the fourth flat square surface 421 is adapted to mate with the third flat square surface 324. The fourth flat square surface 421 and the third flat square surface 324 cooperate to form a circumferential positioning structure, providing dual positioning for the contact base 3, improving the installation accuracy of the contact base 3, and ensuring that the contact base 3 is properly installed. In other embodiments, when the first column portion 321 only has the second flat square surface 323, the fourth flat square surface 421 is adapted to mate with the second flat square surface 323. The fourth flat square surface 421 and the second flat square surface 323 cooperate to form a circumferential positioning structure. A second mounting hole 44 is provided on the pressure equalizing plate 4, corresponding to the fastener 5. A second countersunk hole 441 is provided above the second mounting hole 44. The fastener 5 passes through the second mounting hole 44, with the head of the fastener 5 completely submerged in the second countersunk hole 441. This prevents discharge at the tip of the fastener 5 head and improves the product's withstand voltage.

[0031] The contact holder 3 of the present invention is directly inserted into the support beam 2 by plug-in and is fixed by pressing with the equalizing plate 4. On the one hand, the problem of increased resistance caused by the transmission between parts is eliminated, and the loss during the current transmission process is reduced; on the other hand, the assembly procedure is simplified. The contact holder 3 is fixed by pressing with the equalizing plate 4. To adjust the contact holder 3, only the corresponding equalizing plate 4 needs to be adjusted, which saves time and cost. Moreover, the contact holder 3 is fixed by pressing with the equalizing plate 4, which increases the fracture distance and improves the fracture withstand voltage.

[0032] The above description is an explanation of the present invention, not a limitation of the present invention. The present invention may be modified in any form without violating the spirit of the present invention.

Claims

1. A static contact seat connection structure of a three-position switch, arranged on a support beam (2), characterized in that: The contact seat (3) includes a contact (31) and a connecting portion (32), the connecting portion (32) is inserted into the insertion hole (21) of the support beam (2), the equalizing plate (4) presses the contact seat (3) onto the support beam (2), the contact (31) passes through the outlet hole (41) of the equalizing plate (4), and the equalizing plate (4) is fixed to the support beam (2).

2. The static contact seat connection structure of a three-position switch according to claim 1, characterized in that: An axial positioning structure is provided between the contact seat (3) and the support beam (2).

3. The static contact seat connection structure of a three-position switch according to claim 2, characterized in that: A first countersunk hole (211) is provided on the insertion hole (21) of the support beam (2), and a first step surface (212) is formed in the insertion hole (21); a first column portion (321) and a second column portion (322) are provided on the connecting portion (32) of the contact seat (3); an axial positioning surface is provided at the bottom of the first column portion (321), and the axial positioning surface cooperates with the first step surface (212) of the insertion hole (21) to form an axial positioning structure; or the bottom surface of the contact (31) cooperates with the first step surface (212) of the insertion hole (21) to form an axial positioning structure.

4. The static contact seat connection structure of a three-position switch according to claim 1, characterized in that: A circumferential positioning structure is provided between the contact seat (3) and the support beam (2).

5. The static contact seat connection structure of a three-position switch according to claim 4, characterized in that: A first flat square plane (213) is provided on the inner wall surface of the insertion hole (21) of the support beam (2), and a second flat square plane (323) is correspondingly provided on the connecting portion (32) of the contact seat (3). The second flat square plane (323) cooperates with the first flat square plane (213) to form a circumferential positioning structure.

6. The static contact seat connection structure of a three-position switch according to claim 1, characterized in that: A press-fitting hole (42) is provided on the pressure-equalizing plate (4), a third step surface (43) is formed between the press-fitting hole (42) and the through hole (41), the press-fitting hole (42) corresponds to the upper portion of the first column portion (321) of the contact seat (3), and the third step surface (43) is pressed against the top surface of the first column portion (321).

7. The static contact seat connection structure of a three-position switch according to claim 1, characterized in that: A circumferential positioning structure is provided between the pressure equalizing plate (4) and the contact seat (3).

8. The static contact seat connection structure of a three-position switch according to claim 7, characterized in that: A fourth flat square plane (421) is provided on the press-fitting hole (42) of the pressure equalizing plate (4), and the fourth flat square plane (421) cooperates with the second flat square plane (323) to form a circumferential positioning structure; or a third flat square plane (324) is provided on the first column portion (321) of the contact seat (3), and the fourth flat square plane (421) cooperates with the third flat square plane (324) to form a circumferential positioning structure.

9. The static contact seat connection structure of a three-position switch according to claim 1, characterized in that: The contact (31) of the contact seat (3) is a flat sheet structure, and the through hole (41) of the equalizing plate (4) is correspondingly a flat long hole.

10. The static contact seat connection structure of a three-position switch according to claim 1, characterized in that: The pressure equalizing plate (4) is fixedly connected to the first mounting hole (22) of the support beam (2) through the fastener (5), and the nut (6) connected to the fastener (5) is placed in the first mounting hole (22); a second mounting hole (44) is opened on the pressure equalizing plate (4) corresponding to the fastener (5), and a second countersunk hole (441) is opened on the upper part of the second mounting hole (44), and the fastener (5) passes through the second mounting hole (44), and the head of the fastener (5) is sunk into the second countersunk hole (441).

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