Contact column assembly and movable contact group

Abstract

The utility model provides a contact column assembly and a movable contact group. The contact column assembly comprises a contact column and a contact ring axial limiting member. Through cooperation of the annular groove, the stainless steel elastic piece and the limiting inclined strut which are arranged in the columnar cavity, axial loosening of the contact ring axial limiting piece is effectively prevented, particularly, the limiting inclined strut cannot be damaged by operation external force, and only when the contact ring axial limiting piece moves outwards in the axial direction under the impact effect of the contact ring, the contact ring axial limiting piece cannot be loosened. When the contact ring axially moves outwards, the limiting inclined strut abuts against the top wall of the annular groove, axial outward movement of the contact ring axial limiting piece is stopped by means of the stopping effect of the top wall of the annular groove, the stopping effect on axial outward movement of the contact ring is greatly improved by arranging multiple layers of stopping structures, the contact ring is not affected by high-frequency vibration, and the service life of the contact ring is prolonged. As the limiting inclined strut always abuts against the top wall of the annular groove, the service life of the movable contact group is greatly prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit technology, specifically relating to a contact post assembly and a moving contact group. Background Technology

[0002] The moving contact assembly is one of the most important electrical components of a switch machine. Its reliable and stable electrical contact performance during connection is crucial. During long-term use, the moving contact assembly is subjected to active left-right swaying and impacting of the stationary contact assembly, along with significant centrifugal force and impact vibration. The contact ring is forced outward by the centrifugal force and simultaneously impacted by the contact plates and the reverse impact of the stop post. Under repeated impacts and vibrations, the thin cotter pin and small retaining ring cannot withstand the strain, easily becoming loose and rendering the moving contact ring unusable.

[0003] To this end, Chinese utility model patent application number 201820291846.9 discloses an ultra-strong railway moving contact assembly, which mainly achieves axial positioning of the contact ring fitted on the contact column by installing bolts on the top of the contact column and a flange with loosening teeth on the bottom surface, ensuring normal operation of the moving contact ring and having a long service life.

[0004] However, in practical applications, with long-term operation, harsh environments, and improper operation, the loosening teeth on the bottom of the flange are often squeezed and deformed, weakening the loosening effect. In addition, the strong vibrations from frequent train traffic can also loosen the flange, causing it to lose its loosening function, resulting in high maintenance costs in the later stages. Utility Model Content

[0005] The purpose of this invention is to provide a contact post assembly and moving contact group that offer better relaxation effects and lower maintenance costs.

[0006] To achieve the above objectives, this utility model provides a contact post assembly, including a contact post and an axial limiting member for the contact ring;

[0007] The contact post includes a contact ring sleeve section and a fixed embedded section;

[0008] The contact ring assembly has an axially extending cylindrical cavity inside, and at least one annular groove is provided on the inner wall of the cylindrical cavity.

[0009] The contact ring axial limiting component includes a column and a frustum fixed to the top of the column;

[0010] An axially extending cavity is formed in the cylinder, and the axial cavity is coaxial with and communicates with the through hole formed on the frustum.

[0011] A traction rod is placed in the axial cavity through the perforation. The lower end of the traction rod is connected to the center of a laterally extending stainless steel spring. The two ends of the stainless steel spring protrude from two opposite lateral perforations on the column and are fixedly connected to the center of two oppositely arranged limiting diagonal braces outside the column.

[0012] The lower end of the limiting brace is connected to the outer wall of the column located below the transverse perforation, and the limiting brace tilts outward and extends upward from the connection point. When the column is placed in the columnar cavity, as the pre-compression tendency of the columnar cavity disappears, the limiting brace enters the annular groove under the elastic push of the stainless steel spring sheet, forming a supporting force with the top wall of the annular groove, thereby preventing the contact ring from moving upward along the limiting member.

[0013] Meanwhile, a moving contact assembly is provided, including a moving contact block and a contact post assembly fixed on the moving contact block;

[0014] The fixed embedded section is integrally cast within the moving contact block.

[0015] The beneficial effects of this utility model are as follows: Through the cooperation of the annular groove, stainless steel spring sheet, and limiting brace built into the cavity, the axial loosening of the axial limiting component of the contact ring is effectively prevented. In particular, the limiting brace will not be damaged by external operating forces. Only when the axial limiting component of the contact ring moves outward along the axial direction under the impact of the contact ring will the limiting brace abut against the top wall of the annular groove. The axial outward movement of the axial limiting component of the contact ring is prevented by the blocking effect of the top wall of the annular groove. By setting multiple layers of such blocking structures, the axial outward movement of the contact ring is greatly improved, and it will not be affected by high-frequency vibrations because the limiting brace will always abut against the top wall of the annular groove, which greatly improves the service life of the moving contact assembly and reduces maintenance costs.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the contact post assembly structure.

[0018] Figure 2 This is a schematic diagram of the axial limiting component of the contact ring.

[0019] Explanation of reference numerals in the attached drawings: 1. Connecting ring sleeve section; 2. Fixed embedding section; 3. Columnar cavity; 4. Annular groove; 5. Column; 6. Frustum; 7. Axial cavity; 8. Perforation; 9. Pull rod; 10. Stainless steel spring; 11. Transverse perforation; 12. Limiting diagonal brace; 13. Crossbar. Detailed Implementation

[0020] To further illustrate the technical means and effects of this utility model in achieving its intended purpose, the following detailed description of the specific implementation methods, structural features, and effects of this utility model is provided in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, the contact post assembly includes a contact post and a contact ring axial limiting member. The contact post includes a contact ring sleeve section 1 and a fixed embedding section 2. An axially extending columnar cavity 3 is opened in the contact ring sleeve section 1, and at least one annular groove 4 is provided on the inner wall of the columnar cavity 3.

[0022] The contact ring axial limiting component includes a column 5 and a frustum 6 fixed to the top of the column 5. An axially extending axial cavity 7 is formed inside the column 5, and this axial cavity 7 is coaxial with and communicates with a through hole 8 formed on the frustum 6. A pull rod 9 is placed inside the axial cavity 7 through the through hole 8. The lower end of the pull rod 9 is connected to the center of a laterally extending stainless steel spring 10. Both ends of the stainless steel spring 10 protrude from two opposite laterally extending through holes 11 formed on the column 5, and are connected to two oppositely arranged holes outside the column 5. The center of the limiting brace 12 is fixedly connected; the lower end of the limiting brace 12 is connected to the outer wall of the column 5 located below the transverse perforation 11, and the limiting brace 12 is inclined outward and extended upward from the connection point, so that when the column 5 is placed in the columnar cavity 3, when the limiting brace 12 passes through the annular groove 4, the pre-compression tendency of the columnar cavity 3 disappears and it enters the annular groove 4 under the elastic force of the stainless steel spring sheet 10, forming a supporting force with the top wall of the annular groove 4, thereby preventing the contact ring axis from moving upward to the limiting member. It should be noted that when the axial limiting member of the contact ring is inserted into the cylindrical cavity 3, the limiting brace 12 is squeezed against the column 5, and at the same time, the stainless steel spring sheet 10 is also squeezed and deformed, in a state of elastic storage. When the axial limiting member of the contact ring slides down and the limiting brace 12 slides down to the annular groove 4, due to the disappearance of the external force squeezing source, it unfolds outward under the action of the restoring elasticity of the stainless steel spring sheet 10 and is inserted into the annular groove 4 at an angle upward. When the axial limiting member of the contact ring is impacted by the contact ring and moves outward, the limiting brace 12 tilts upward and outward and inserts into the annular groove 4. Its top abuts against the top wall of the annular groove 4, forming a jam, thereby preventing the axial limiting member of the contact ring from moving outward. In addition, the frustum 6 effectively blocks the axial outward movement of the contact ring, ensuring that the contact ring will not detach from the contact column. Furthermore, because the contact ring has appropriate vertical movement space, it is beneficial to reduce the force between the stationary contact piece and the contact ring, reduce wear, and extend service life.

[0023] To enhance the blocking effect of the axial limiting member at the docking point, this embodiment is further improved on the basis of the aforementioned embodiment as follows:

[0024] There are two annular grooves 4, arranged vertically along the axis; there are two stainless steel spring pieces 10, arranged vertically along the axis; there are two sets of transverse through holes 11, each arranged vertically along the axis; the lower end of the pull rod 9 is connected to two stainless steel spring pieces 10 respectively; there are two sets of limiting diagonal braces 12, arranged vertically along the axis, and the two limiting diagonal braces 12 in each set are respectively connected to the two ends of a corresponding stainless steel spring piece 10. Of course, based on this embodiment, more limiting diagonal braces 12 and their matching structures can be designed as needed.

[0025] Based on the two embodiments mentioned above, this embodiment has an external thread on the top section of the column 5 located below the frustum 6, which is threaded to the internal thread on the inner wall of the top section of the columnar cavity 3. The threaded connection further enhances the installation stability of the axial limiting component of the contact ring, and at the same time reduces the force on the limiting brace 12, so that the limiting brace 12 can bear the force after the static threaded connection structure is weakened, further extending the service life of the entire component and greatly reducing the later maintenance cost.

[0026] To facilitate later maintenance, a crossbar 13 is provided at the top of the pull rod 9 in this embodiment. With the help of a clamp, the pull rod 9 can be well clamped and lifted upwards, causing the stainless steel spring plate fixedly connected to it to deform, pulling the limiting diagonal brace 12 toward the column 5 and retracting it, making it convenient to pull out the column 5 to complete maintenance or replacement.

[0027] Similarly, the inner diameters of the cylindrical cavity 3 and the perforation 8 are designed as follows: Figure 2 The same inner diameter is shown, which makes it easier to insert and remove the pull rod 9. Of course, a plug can also be fitted at the perforation 8 to prevent debris from falling in.

[0028] Based on the foregoing embodiments, this embodiment provides a moving contact assembly, including a moving contact block and a contact post assembly fixed on the moving contact block; the fixed embedding section 2 of the contact post is integrally cast in the moving contact block, and other known methods can also be used to fix it on the moving contact block.

[0029] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention; however, it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention; all such deductions or substitutions should be considered to fall within the protection scope of the present invention.

Claims

1. A contact post assembly, comprising contact posts, characterized in that: It also includes axial limiting components for the contact ring; The contact post includes a contact ring sleeve section (1) and a fixed embedding section (2); The contact ring sleeve section (1) has an axially extending cylindrical cavity (3) inside, and at least one annular groove (4) is provided on the inner wall of the cylindrical cavity (3). The contact ring axial limiting component includes a column (5) and a frustum (6) fixed to the top of the column (5); An axial cavity (7) extending axially is provided inside the column (5), and the axial cavity (7) is coaxial with and connected to the through hole (8) provided on the frustum (6). A pull rod (9) is placed in the axial cavity (7) through the through hole (8). The lower end of the pull rod (9) is connected to the center of a transversely extending stainless steel spring (10). The two ends of the stainless steel spring (10) pass through two opposite transverse through holes (11) opened on the column (5) and are fixedly connected to the center of two oppositely arranged limiting diagonal braces (12) set outside the column (5). The lower end of the limiting brace (12) is connected to the outer wall of the column (5) located below the transverse perforation (11), and the limiting brace (12) is inclined outward and extended upward from the connection point so that when the column (5) is placed in the columnar cavity (3), the limiting brace (12) passes through the annular groove (4) and enters the annular groove (4) under the elastic push of the stainless steel spring sheet (10) because the pre-compression tendency of the columnar cavity (3) disappears, forming a supporting force with the top wall of the annular groove (4), thereby preventing the contact ring from moving upward along the limiting member.

2. The contact post assembly according to claim 1, characterized in that: There are two annular grooves (4), which are arranged vertically along the axis; There are two stainless steel springs (10), which are arranged vertically along the axial direction; The transverse perforations (11) are in two sets, respectively arranged vertically along the axial direction; The lower end of the pull rod (9) is connected to the two stainless steel springs (10) respectively; The limiting brace (12) consists of two sets, arranged vertically along the axis, and the two limiting braces (12) in each set are respectively connected to the two ends of a corresponding stainless steel spring (10).

3. The contact post assembly according to claim 1 or 2, characterized in that: The top section of the column (5) located below the frustum (6) is provided with an external thread, which is threaded to the internal thread provided on the inner wall of the top section of the columnar cavity (3).

4. The contact post assembly according to claim 1 or 2, characterized in that: A crossbar (13) is provided at the top of the traction rod (9).

5. The contact post assembly according to claim 1 or 2, characterized in that: The cylindrical cavity (3) has the same inner diameter as the perforation (8).

6. A moving contact assembly, comprising a moving contact block, characterized in that, It also includes the contact post assembly of claim 1 or 2 fixed on the moving contact block; The fixed embedded section (2) is integrally cast within the moving contact block.

7. The moving contact assembly according to claim 6, characterized in that: The top section of the column (5) located below the frustum (6) is provided with an external thread, which is threaded to the internal thread provided on the inner wall of the top section of the columnar cavity (3).

8. The moving contact assembly according to claim 6, characterized in that: A crossbar (13) is provided at the top of the traction rod (9).

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