Moving contact group of change-over switch

Abstract

The utility model discloses a movable contact group of a change-over switch, which belongs to the technical field of movable contact groups of change-over switches, and particularly structurally comprises a conductive contact ring, a contact column and a contact base, the contact ring is sleeved on the contact column, the contact column is fixedly connected on the contact base, and the lower end of the contact column is fixedly connected with a fixed inlay. And the fixed inlay is embedded into the contact base to be fixed. According to the utility model, after the fixed inlay is fixedly connected with the lower end of the binding post, the end of the binding post is embedded into the contact base to be fixed (by means of pouring and the like), part of the inlay in the contact base is embedded into the groove part or the three-dimensional cavity structure with a large lower part and a small upper part is used for blocking and limiting the fixed inlay, and the fixed inlay is prevented from being damaged under the impact action of horizontal force on the contact post for a long time. According to the utility model, better connection reliability and anti-drop effect are achieved, the connection stability of the contact column can be improved, the drop is avoided, the contact area is increased, and the occlusion stability of the contact base and the contact column is better.

Description

Technical Field

[0001] The utility model belongs to the technical fields of low-voltage switches and rail transit equipment, and particularly relates to a switch group / contact group of a turnout conversion device, especially a line equipment for the interaction control of vehicles or trains. Background Art

[0002] There are multiple groups of switches / contacts in the turnout conversion device, which are used for switching the on-off states of its action circuit and indication circuit. The anti-disengagement limit structure at the upper end of the contact ring of the existing moving contact group of the conversion switch adopts a structure of gasket + lock nut, or nut + spring pin, or spring pin. During the swinging conversion process of the moving contact group, due to the very rapid action process, a large centrifugal force will be generated on the contact ring, and it is also affected by the impact force of the static contact group, resulting in a long-term impact force of the moving contact ring on the anti-disengagement limit structure at its upper end, making the anti-disengagement limit structure easily damaged, the contact ring fall off, and the switch group / contact group unable to work. Therefore, the connection reliability of the existing connection method is poor and the service life is low.

[0003] And a railway integrated moving contact group disclosed in a Chinese patent application (application number: 2020200723410) has contact columns connected at the lower end at intervals by two nuts and the lower end is buried in the contact base. In this way, during the frequent opening and closing process of the contact ring, rotation occurs, and then the connection column is affected by the rotational torque. Under the long-term impact of this rotational torque, the connection column will rotate with the nut, and then there is a possibility of loosening and falling off, and the connection reliability is poor. Summary of the Invention

[0004] The technical problem to be solved by the utility model is: to provide a moving contact group of a conversion switch, which realizes better connection reliability between the connection column and the contact base and will not loosen.

[0005] The technical solution adopted by the utility model is: a moving contact group of a conversion switch, including a conductive contact ring, a contact column and a contact base. The contact ring is sleeved on the contact column, the contact column is fixedly connected to the contact base, a fixed insert is fixedly connected to the lower end of the contact column, the fixed insert is provided with at least one groove or is a three-dimensional structure with a larger lower part and a smaller upper part, the fixed insert is embedded in the contact base for fixation, and at least a part of the groove is located in the contact base.

[0006] Further, the above groove is a single-sided groove, a multi-sided groove, an upper and lower row staggered groove or an annular groove.

[0007] Further, the above three-dimensional structure with a larger lower part and a smaller upper part is a conical column, a pyramid column or a variable cross-section column.

[0008] Further, the lower end of the contact column and the fixed insert are fixed by riveting, pin fixing or threading.

[0009] Furthermore, the above-mentioned bolt is vertically inserted into the contact post and the fixed inlay, and has an interference fit with both the contact post and the dumbbell-shaped fixed inlay.

[0010] Furthermore, two of the above-mentioned bolts are used and arranged in a cross shape.

[0011] Furthermore, the lower large-end of the above-mentioned fixed inlay is embedded into the contact base, and the upper end is higher than the upper end face of the contact base by a certain length and abuts against the bottom of the contact ring.

[0012] Furthermore, the above-mentioned contact ring is rotatably connected to the contact post. A circular limiting platform is provided at the upper end of the contact post, and the contact ring is located between the circular limiting platform and the upper large-end of the fixed inlay.

[0013] Furthermore, an installation limiting groove is provided at the bottom of the above-mentioned contact base, and screw installation holes are vertically provided on the contact base.

[0014] Furthermore, the above-mentioned contact base is made of insulating material.

[0015] The beneficial effects of the present utility model: Compared with the prior art, the effects of the present utility model are as follows:

[0016] (1) After the fixed inlay is fixedly connected to the lower end of the connection post and this end is buried and fixed in the contact base (by pouring or other means), a part of the inlay inside the contact base is embedded in the groove part or the three-dimensional cavity structure with a larger lower part and a smaller upper part blocks and limits the fixed inlay. Under the long-term impact of horizontal force on the contact post, it plays a better role in connection reliability and anti-disconnection, can improve the connection stability of the contact post, avoid disconnection, and the contact area is increased, and the biting stability of the contact base on the contact post is better;

[0017] (2) The lower end of the contact post and the fixed inlay adopt the fixing methods of riveting, bolting and threading, which is convenient to fixedly connect the fixed inlay to the lower end part of the contact post, and the connection is stable and reliable;

[0018] (3) The interference fit method is adopted between the contact post and the fixed inlay to improve the connection stability and avoid the problem of poor connection reliability caused by the existence of gaps;

[0019] (4) The fixing method of the cross-shaped bolt further improves the connection reliability between the contact post and the fixed inlay;

[0020] (5) The lower end of the fixed inlay is embedded in the contact base, which can maintain the stability of the contact post. The upper end is higher than the upper end face of the contact base by a certain length, leaving a section, which is convenient for installing the contact ring and can let it rotate freely without being interfered;

[0021] (6) The annular limiting platform is provided to prevent the rotating contact ring from coming off. The contact ring is located between the annular limiting platform and the upper large-end of the fixed inlay. Under the limiting action of the annular limiting platform and the upper large-end of the fixed inlay, the rotational movement in a limited space can be achieved;

[0022] (7) By adopting a unilateral groove, multi-sided grooves, upper and lower staggered grooves or annular grooves for the groove, and a three-dimensional structure of a conical column, pyramid column or column with a gradually decreasing cross-section from bottom to top, a better limiting, fixing and anti-disengagement effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic cross-sectional structure diagram of the moving contact group of the change-over switch fixed by hole riveting;

[0024] Figure 2 It is a schematic top view structure diagram of the moving contact group of the change-over switch fixed by hole riveting;

[0025] Figure 3 It is a schematic side view structure diagram of the moving contact group of the change-over switch fixed by dot riveting;

[0026] Figure 4 For Figure 3 the cross-sectional structure diagram B-B in;

[0027] Figure 5 It is a schematic side view structure diagram of the moving contact group of the change-over switch fixed by a plug;

[0028] Figure 6 For Figure 4 the cross-sectional structure diagram C-C in.

[0029] In the figure: 1. Contact ring; 2. Contact post; 3. Contact base; 4. Fixed inlay; 5. Screw mounting hole; 6. Mounting limiting groove; 7. Plug; 8. Annular limiting platform; 9. Groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present utility model will be further introduced below in conjunction with the drawings and specific embodiments.

[0031] Embodiment 1: Referring to Figure 1-2 as shown, a moving contact group of a change-over switch includes a conductive contact ring 1, a contact post 2 and a contact base 3. The contact ring 1 is sleeved on the contact post 2, the contact post 2 is fixedly connected to the contact base 3, a fixed inlay 4 is fixedly connected to the lower end of the contact post 2, the fixed inlay 4 is provided with at least one groove 9, the fixed inlay 4 is embedded in the contact base 3 for fixation, at least a part of the groove 9 is located in the contact base 3, and the contact base 3 is made of an insulating material.

[0032] The groove 9 is a single-sided groove, a multi-sided groove, an upper and lower row staggered groove or an annular groove. The annular groove types include a dumbbell-shaped structure and an H-shaped structure. In this embodiment, the dumbbell-shaped structure is preferably used. The three-dimensional structure with a larger bottom and a smaller top is a conical column, a pyramid column or a variable cross-section column. The three-dimensional structure with a larger bottom and a smaller top can be an independent structure or used simultaneously with the groove. When used simultaneously, the connection reliability is further improved.

[0033] To increase the connection reliability, the lower end of the contact post 2 and the fixed inlay 4 are fixed by riveting. The riveting method sets a hole riveting structure at the end of the lower end of the contact post 2. The hole riveting also increases the connection reliability between the contact post and the contact base.

[0034] To further improve the connection stability between the contact post and the fixed inlay, the pin 7 is vertically inserted into the contact post 2 and the fixed inlay 4, and has an interference fit with both the contact post 2 and the fixed inlay 4.

[0035] To maintain the stability of the contact post, the lower end of the fixed inlay 4 is embedded in the contact base 3, the upper end is higher than the upper end face of the contact base 3 by a certain length and abuts against the lower end of the contact ring, leaving a section for convenient installation of the contact ring 1 and allowing it to rotate freely without being interfered. For the fixed inlay with a dumbbell-shaped structure or an H-shaped structure, the lower large head is located in the contact base, and the upper large head abuts against the bottom of the contact ring 1. For the fixed inlay of other structures except the dumbbell-shaped structure or the H-shaped structure, the upper end of the fixed inlay abuts against the contact ring to play a supporting role.

[0036] Among them, the contact ring 1 is rotatably connected to the contact post 2. To prevent the rotating contact ring 1 from coming off, a circular limiting platform 8 is provided at the upper end of the contact post 2. The contact ring 1 is located between the circular limiting platform 8 and the upper large head end of the fixed inlay 4. Under the limiting action of the circular limiting platform 8 and the upper large head end of the fixed inlay 4, a rotational movement in a limited space can be realized.

[0037] To facilitate installation and quick positioning, an installation limiting groove 6 is provided at the bottom of the contact base 3, and a screw installation hole 5 is vertically provided on the contact base 3. The installation limiting groove 6 corresponds to the convex platform of the installation device, which can quickly achieve positioning, with high installation position accuracy and greatly improved installation efficiency.

[0038] Example 2: Refer to Figure 1-2 As shown, the fixed inlay is a three-dimensional structure with a larger bottom and a smaller top, and the three-dimensional structure is a conical column, a pyramid column or a variable cross-section column.

[0039] Example 3: Refer to Figure 1-2 As shown, the fixed inlay is a three-dimensional structure with a larger bottom and a smaller top, and the three-dimensional structure is a conical column, a pyramid column or a variable cross-section column. The three-dimensional structure with a larger bottom and a smaller top is provided with a single-sided groove, a multi-sided groove, an upper and lower row staggered groove or an annular groove.

[0040] Example 4: Refer to Figure 2-4 As shown, this example is mostly the same as Example 1. The riveting method between the lower end of the contact post 2 and the fixed inlay 4 is a spot riveting structure, and the spot riveting also increases the connection reliability between the contact post and the contact base.

[0041] Example 5: Refer to Figure 2 and 5 -6 As shown, this example is mostly the same as Example 1. Only the lower end of the contact post 2 and the fixed inlay 4 are fixed by a pin 7. The use of a pin insertion improves the connection stability between the lower end of the contact post 2 and the fixed inlay; in order to further improve the connection stability between the contact post and the fixed inlay, two pins 7 are used and arranged in a cross.

[0042] Example 6: Refer to Figure 1-2 As shown, this example is the same as Example 1. Only the lower end of the contact post 2 and the fixed inlay 4 are fixed by threads. The threaded connection is convenient for installation and disassembly and is reliable in connection.

[0043] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claimed rights.

Claims

1. A moving contact group of a change-over switch, comprising a conductive contact ring (1), a contact post (2) and a contact base (3), the contact ring (1) being sleeved on the contact post (2), and the contact post (2) being fixedly connected to the contact base (3), characterized in that: A fixed inlay (4) is fixedly connected to the lower end of the contact post (2). The fixed inlay (4) is provided with at least one groove (9) or has a three-dimensional structure with a larger bottom and a smaller top. The fixed inlay (4) is embedded in the contact base (3) for fixation, and at least a part of the groove (9) is inlaid with the contact base (3).

2. The movable contact group of the change-over switch according to claim 1, characterized in that: The groove (9) is a unilateral groove, a multi-sided groove, an upper and lower row staggered groove or an annular groove.

3. The moving contact group of the change-over switch according to claim 1, characterized in that: The three-dimensional structure with a larger bottom and a smaller top is a conical column, a pyramid column or a variable cross-section column.

4. The moving contact group of a change-over switch according to claim 1, characterized in that: The lower end of the contact post (2) and the fixed inlay (4) are fixed by riveting, by a pin (7) or by threading.

5. The moving contact group of a change-over switch according to claim 4, characterized in that: The pin (7) is vertically inserted into the contact post (2) and the fixed inlay (4), and has an interference fit with both the contact post (2) and the fixed inlay (4).

6. A moving contact group of a change-over switch according to any one of claims 4-5, characterized in that: Two pins (7) are used and arranged in a cross.

7. A moving contact group of a change-over switch according to any one of claims 1-2 or 4-5, characterized in that: The lower end of the fixed inlay (4) is embedded in the contact base (3), and the upper end of the fixed inlay (4) is higher than the upper end face of the contact base (3) by a certain length and abuts against the bottom of the contact ring (1).

8. A moving contact group of a change-over switch according to any one of claims 1-5, characterized in that: The contact ring (1) is rotatably connected to the contact post (2). An annular limiting platform (8) is provided at the upper end of the contact post (2), and the contact ring (1) is located between the annular limiting platform (8) and the upper end of the fixed inlay (4).

9. A moving contact group of a change-over switch according to any one of claims 1-5, characterized in that: An installation limiting groove (6) is provided at the bottom of the contact base (3), and a screw installation hole (5) is provided vertically on the contact base (3).

10. A moving contact group of a change-over switch according to any one of claims 1-5, characterized in that: The contact base (3) is made of an insulating material.

Images