Contact group linkage mechanism

Abstract

The utility model discloses a contact group linkage mechanism. The upper connecting lever is matched with a contact group and is provided with a guide groove, the clearance compensation arm is arranged in the guide groove of the upper connecting lever, a tension spring nut is arranged on one side of the lower part of the moving point frame, and a main tension spring is connected onto the tension spring nut; a rotating shaft assembly which is located in the guide groove of the upper crank arm and pressed below the clearance compensation arm is installed on the moving point frame, and the upper crank arm can be kept in a stable motion state through compensation matching of the clearance compensation arm to the rotating shaft assembly. The utility model has the advantages that the aim of eliminating gaps of all transmission parts is fulfilled, the contact reliability of the contacts is greatly improved, and the action accuracy of the contact group is ensured. Under the condition that the original linkage mode position and action mode are not changed, the reliability is higher, and in addition, the interchange problem of the oil-immersed contact assembly and the arrangement type contact assembly can be quickly completed.

Description

Technical Field

[0001] The utility model relates to a transmission component of an automatic switch switch in a track signal control system, in particular to a contact group linkage mechanism. Background Art

[0002] At present, in the existing technology, track switch machines usually adopt arranged contact groups. Such contact groups are generally open and modular in design. Since they work in relatively harsh environments such as humidity and dust, the arranged contact groups need to be regularly maintained on the track. Later, oil-immersed maintenance-free contact groups appeared on the market. Such contact groups adopt an integrated sealed oil-immersed design, which solves the above problems very well. Therefore, their applications are becoming more and more common. However, when the arranged contact group is changed to an oil-immersed contact group, the original linkage mechanism cannot be directly adapted due to the inconsistency of the transmission angles of the two.

[0003] In order to overcome the above-mentioned installation problem, the conventional solution is to use a four-bar linkage transmission for conversion, but the installation process is very cumbersome and cannot be replaced quickly. For example, a simple linkage mechanism is disclosed in the utility model with the announcement number CN220155386U and the name of the oil-immersed maintenance-free contact group of the close-fitting inspector. On the one hand, its split structural design requires the entire contact group to be disassembled when maintenance is required, which brings the problem of inconvenience in disassembly. On the other hand, although a linkage spring is designed, the linkage spring is hung on the upper side of the driven crank arm. Although this installation method improves the static contact group to maintain a reliable contact force to a certain extent, its upper installation method also changes the original structure, which not only changes its action mode and reduces the action reliability, but also has the problem of inconvenience in disassembly. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a contact group linkage mechanism which has an ingenious structural design, good reliability in use and can quickly interchange a horizontal contact group with an existing arranged contact group.

[0005] In order to solve the above technical problems, the contact group linkage mechanism of the utility model includes a moving point frame, an upper crank arm with a guide groove installed in cooperation with the contact group, and a gap compensation arm arranged in the guide groove of the upper crank arm. A tension spring nut is provided on the lower side of the moving point frame, and a main tension spring is connected to the tension spring nut. The moving point frame is equipped with a rotating shaft assembly located in the guide groove of the upper crank arm and pressed under the gap compensation arm. The upper crank arm can maintain a stable motion state through the compensating cooperation of the gap compensation arm with the rotating shaft assembly.

[0006] The gap compensation arm includes a pressure arm that cooperates with the rotating shaft assembly and a spring that cooperates with the pressure arm. The top of the pressure arm is provided with a placement groove. The spring is placed in the placement groove and can make the pressure arm press against the outer surface of the rotating shaft assembly.

[0007] The rotating shaft assembly comprises a rotating shaft mounted in cooperation with the moving point frame, a roller sleeved outside the rotating shaft, and a bushing arranged between the rotating shaft and the roller.

[0008] An annular groove is provided at the top of the guide groove of the upper crank arm, and a lubricating sleeve for lubricating the outer surface of the gap compensation arm is placed in the annular groove.

[0009] The lubricating sleeve is a graphite copper sleeve.

[0010] A spring stopper for pressing the spring is fixedly installed on the top of the upper crank arm.

[0011] A spring inner ring fixing shaft for limiting the spring is fixedly mounted on the spring blocking piece.

[0012] The rotating shaft is mounted on the moving point frame through a step crank arm pin.

[0013] The advantages of the utility model are:

[0014] (1) By providing an upper crank arm with a guide groove installed in conjunction with the contact group and a gap compensation arm placed in the guide groove of the upper crank arm, the purpose of eliminating the gap between the transmission components is achieved. Even if the shaft holes of the components produce gaps due to vibration, the gaps can be effectively compensated by the gap compensation arm, which greatly improves the reliability of the contact and ensures the accuracy of the contact group operation.

[0015] (2) By arranging a tension spring nut on one side of the lower part of the moving point frame, and connecting a main tension spring to the tension spring nut, the original structure is not changed. Without changing the position and action mode of the original linkage mode, the reliability is improved. In addition, there is no problem of inconvenience in disassembly and assembly caused by the traditional main tension spring being on the upper side of the driven crank arm. Therefore, the interchangeability between the oil-immersed contact assembly and the arranged contact assembly can be completed quickly.

[0016] (3) The entire structural design is very simple and reasonable, and it is very easy to assemble and disassemble. The maintenance contacts can be easily replaced, which greatly improves the efficiency of replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the contact group linkage mechanism of the utility model in the installed state;

[0018] Figure 2 This is a schematic diagram of the main structure of the contact group linkage mechanism of the utility model in the installed state;

[0019] Figure 3 for Figure 2 AA cross-sectional structural diagram;

[0020] Figure 4 This is a side view of the structure of the contact group linkage mechanism of the utility model in the installed state;

[0021] Figure 5 It is a structural schematic diagram of the coordinated installation state of the lubricating sleeve, the rotating shaft assembly and the upper crank arm in the utility model. DETAILED DESCRIPTION

[0022] The contact group linkage mechanism of the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] As shown in the figure, the contact group linkage mechanism of the present invention includes a moving point frame 1, an upper crank arm 2 with a guide groove installed in conjunction with the contact group, and a gap compensation arm 3 placed in the guide groove of the upper crank arm 2. Figure 3 It can be seen that the upper crank arm 2 is installed in cooperation with the main shaft 17 of the contact group, and a tension spring nut 4 is provided on the lower side of the moving point frame 1, and a main tension spring 5 is connected to the tension spring nut 4. The gap compensation arm 3 includes a pressure arm 7 that cooperates with the rotating shaft assembly 6 and a spring 8 that cooperates with the pressure arm. The top of the pressure arm 7 is provided with a placement groove, and the spring 8 is placed in the placement groove and can make the pressure arm press against the outer surface of the rotating shaft assembly. A spring block 13 for pressing the spring is fixedly installed on the top of the upper crank arm 2. The moving point frame 1 is provided with a rotating shaft assembly 6 located in the guide groove of the upper crank arm 2 and pressed under the gap compensation arm 3. The rotating shaft assembly 6 includes a rotating shaft 9 that is installed in cooperation with the moving point frame 1, a roller 10 mounted outside the rotating shaft, and a bushing 11 arranged between the rotating shaft and the roller. In this embodiment, the rotating shaft 9 is installed on the moving point frame 1 through a step crank arm pin 15. The compensation cooperation of the gap compensation arm 3 with the rotating shaft assembly can enable the upper crank arm 2 to maintain a stable motion state.

[0024] Furthermore, a spring inner ring fixing shaft 14 for limiting the spring may be fixedly mounted on the spring stopper 13 .

[0025] Furthermore, an annular groove may be provided at the top of the guide groove of the upper crank arm 2, and a lubricating sleeve 12 for lubricating the outer surface of the clearance compensation arm 3 may be placed in the annular groove. Figure 5 It can be seen that in this embodiment, the lubricating sleeve 12 is a graphite copper sleeve with through holes distributed on the surface.

Claims

1. A contact group linkage mechanism, characterized in that: The invention comprises a moving point frame (1), an upper crank arm (2) with a guide groove installed in cooperation with a contact group, and a gap compensation arm (3) arranged in the guide groove of the upper crank arm (2); a tension spring nut (4) is provided on one side of the lower part of the moving point frame (1); a main tension spring (5) is connected to the tension spring nut (4); a rotating shaft assembly (6) is installed on the moving point frame (1), which is located in the guide groove of the upper crank arm (2) and pressed below the gap compensation arm (3); and the upper crank arm (2) can maintain a stable motion state through the compensation cooperation of the gap compensation arm (3) with the rotating shaft assembly.

2. The contact group linkage mechanism according to claim 1, characterized in that: The gap compensation arm (3) comprises a pressure arm (7) cooperating with the rotating shaft assembly (6) and a spring (8) cooperating with the pressure arm. A placement groove is provided on the top of the pressure arm (7). The spring (8) is placed in the placement groove and can press the pressure arm against the outer surface of the rotating shaft assembly.

3. The contact group linkage mechanism according to claim 1 or 2, characterized in that: The rotating shaft assembly (6) comprises a rotating shaft (9) mounted in cooperation with the moving point frame (1), a roller (10) sleeved outside the rotating shaft, and a bushing (11) arranged between the rotating shaft and the roller.

4. The contact group linkage mechanism according to claim 3, characterized in that: An annular groove is provided at the top of the guide groove of the upper crank arm (2), and a lubricating sleeve (12) for lubricating the outer surface of the clearance compensation arm (3) is placed in the annular groove.

5. The contact group linkage mechanism according to claim 4, characterized in that: The lubricating sleeve (12) is a graphite copper sleeve.

6. The contact group linkage mechanism according to claim 2, characterized in that: A spring stopper (13) for pressing the spring is fixedly mounted on the top of the upper crank arm (2).

7. The contact group linkage mechanism according to claim 6, characterized in that: A spring inner ring fixing shaft (14) for limiting the spring is fixedly mounted on the spring stopper (13).

8. The contact group linkage mechanism according to claim 3, characterized in that: The rotating shaft (9) is mounted on the moving point frame (1) via a stepped crank arm pin (15).

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