A suspended empty rail expansion joint device

Abstract

The utility model discloses a suspended empty rail expansion joint device, comprising a left fixed plate, a right fixed plate and a middle expansion plate, wherein both sides of the middle expansion plate are provided with middle guide strips arranged obliquely, and a middle oblique groove is formed between the middle guide strip and the middle expansion plate; the left fixed plate and the right fixed plate are both provided with side guide strips for cooperating with the corresponding middle oblique groove, and a plurality of ball top adjustment components for contacting the inner wall of the middle oblique groove are distributed and installed on the side guide strips. The utility model has a simple assembly and manufacturing process, and the rolling friction at some positions replaces the sliding friction, which can greatly reduce the wear of the contact surface and improve the service life; compared with replacing the wear-resistant material added in the middle, there is no need to dismantle the expansion joint device as a whole, and only the ball, spring or top screw need to be replaced from the bottom, and the daily maintenance cost is relatively lower; the buffering effect of the spring on the instantaneous impact force is better than that of the wear-resistant material, and the vehicle has good stability when passing through and low running noise.

Description

Technical Field

[0001] The utility model relates to the technical field of track expansion joints, in particular to a suspended empty track expansion joint device. Background Art

[0002] As an emerging research and development field in China, suspended sky rails can relieve traffic pressure well because they do not occupy ground space. The cost is about one-fifth of that of subways. It is an environmentally friendly, low-carbon and zero-pollution mode of travel. At present, the track expansion joint device used in suspended sky rails is usually a sliding friction (such as a sky rail track beam expansion device disclosed in the authorization announcement number CN207295434U). The middle friction surface is a metal friction surface or a friction surface with a composite wear-resistant material. When the friction surface is severely worn, in order to ensure that the expansion joint device can operate flexibly, it is usually necessary to disassemble the entire expansion joint device and replace it. The daily maintenance cost is relatively high, and the gap between the fixed plate and the expansion plate in the expansion joint device cannot be eliminated, and the buffering capacity is poor. When the vehicle passes through, it has a great impact on its running stability and the noise generated. Utility Model Content

[0003] The utility model aims to provide a suspended empty rail expansion joint device to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A suspended empty rail expansion joint device comprises a left fixed plate, a right fixed plate and a middle expansion plate, wherein both sides of the middle expansion plate are provided with inclined middle guide strips, and a middle oblique groove is formed between the middle guide strip and the middle expansion plate; the left fixed plate and the right fixed plate are both provided with side guide strips for cooperating with the corresponding middle oblique groove, and a plurality of ball top adjustment assemblies for contacting the inner wall of the middle oblique groove are distributed and installed on the side guide strips.

[0006] Preferably, a side oblique groove for cooperating with the corresponding middle guide strip is formed between the left fixed plate and its own side guide strip, and a side oblique groove for cooperating with the corresponding middle guide strip is also formed between the right fixed plate and its own side guide strip.

[0007] Preferably, a limit stop bar is further extended from the outer side of the middle guide bar, and a limit guide groove for cooperating with the limit stop bar is extended from the inner side of the side oblique groove.

[0008] Preferably, the left fixed plate and the right fixed plate are also distributedly installed with a plurality of ball top adjustment components for contacting the limit stop strip, which can further reduce the friction resistance, thereby improving the smoothness and stability of the change adjustment of the track expansion joint.

[0009] Preferably, top adjustment holes are distributed on the left fixed plate, the right fixed plate and the side guide strips, and the ball top adjustment assembly includes balls loaded in the top adjustment holes, springs and top screws, and the top adjustment hole has an end away from the top screw and a limiting ring for limiting the ball, one end of the spring contacts the ball, and the other end of the spring contacts the top screw.

[0010] Preferably, the top screw is installed in the top adjustment hole by threaded fitting, and a hexagonal groove is provided at the outer end of the top screw, so that the position of the top screw can be adjusted by a hexagonal head tool, and the adjustment operation is convenient.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the assembly and manufacturing process of the utility model is simple, and rolling friction in some positions replaces sliding friction, which can greatly reduce the wear of the contact surface and increase the service life; compared with replacing the wear-resistant material added in the middle, there is no need to dismantle the expansion joint device as a whole, only the ball, spring or top screw needs to be replaced from the bottom, and the daily maintenance cost is relatively lower; the spring has a better buffering effect on instantaneous impact force than the wear-resistant material, the vehicle has good stability when passing, and the operating noise is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of a suspended empty rail expansion joint device;

[0013] Figure 2 It is a schematic diagram of the front structure of a suspended empty rail expansion joint device;

[0014] Figure 3 It is a schematic diagram of the back structure of a suspended empty rail expansion joint device;

[0015] Figure 4 It is a schematic diagram of a partially cutaway three-dimensional structure of a suspended empty rail expansion joint device;

[0016] Figure 5 A suspended empty rail expansion joint device Figure 4 The enlarged structural diagram at A in the middle;

[0017] Figure 6 The present invention is a front structural schematic diagram of another embodiment of a suspended empty rail expansion joint device.

[0018] In the figure: 100-top adjustment hole, 1-left fixed plate, 2-right fixed plate, 21-side guide strip, 22-side oblique groove, 23-limit guide groove, 3-middle telescopic plate, 31-middle guide strip, 32-middle oblique groove, 33-limit stop strip, 4-ball, 5-top screw, 6-spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 5 The present embodiment provides a technical solution: a suspended empty rail expansion joint device, comprising a left fixed plate 1, a right fixed plate 2 and a middle expansion plate 3, the left fixed plate 1 and the right fixed plate 2 can be respectively fixedly installed on the guide rails of the corresponding steel box girder, and the two sides of the middle expansion plate 3 have inclined middle guide strips 31, in this embodiment, the two middle guide strips 31 are arranged symmetrically, and a middle oblique groove 32 is formed between the middle guide strip 31 and the middle expansion plate 3; the left fixed plate 1 and the right fixed plate 2 both have side guide strips 21 for cooperating with the corresponding middle oblique groove 32, and a plurality of ball top adjustment components for contacting the inner wall of the middle oblique groove 32 are distributed and installed on the side guide strips 21.

[0021] The working principle of the utility model is that the track expansion joint compensates for the mechanical displacement of the steel box girder caused by thermal expansion and contraction and stress change through the relative position change between the left fixed plate 1, the right fixed plate 2 and the middle expansion plate 3; by distributing the ball top adjustment components, part of the sliding friction between the left fixed plate 1, the right fixed plate 2 and the middle expansion plate 3 is converted into rolling friction, which can improve the smoothness and stability of the change adjustment of the track expansion joint.

[0022] As a specific solution, a side oblique groove 22 for cooperating with the corresponding middle guide strip 31 is formed between the left fixed plate 1 and its own side guide strip 21, and a side oblique groove 22 for cooperating with the corresponding middle guide strip 31 is also formed between the right fixed plate 1 and its own side guide strip 21.

[0023] In order to achieve the limit between the left fixed plate 1, the right fixed plate 2 and the middle telescopic plate 3, the outer side of the middle guide strip 31 is further extended with a limit stop bar 33, and the inner side of the side oblique groove 22 is extended with a limit guide groove 23 for cooperating with the limit stop bar 33. Through the sliding cooperation between the limit stop bar 33 and the limit guide groove 23, the left fixed plate 1, the right fixed plate 2 and the middle telescopic plate 3 are limited in the front-to-back direction to prevent the middle telescopic plate 3 from being disengaged from the left fixed plate 1 and the right fixed plate 2.

[0024] As a specific solution, the left fixed plate 1, the right fixed plate 2 and the side guide strip are provided with top adjustment holes 100, and the ball top adjustment assembly includes a ball 4, a spring 6 and a top screw 5 loaded in the top adjustment hole 100. The top adjustment hole 100 has a limiting ring portion for limiting the ball 4 at one end away from the top screw 5, one end of the spring 6 contacts the ball 4, and the other end of the spring 6 contacts the top screw 5. In this embodiment, the top screw 5 is installed in the top adjustment hole 100 by threaded fitting, and the outer end of the top screw 5 is provided with a hexagonal groove, and the position of the top screw 5 can be adjusted by a hexagonal head tool, and the adjustment operation is convenient.

[0025] By rotating the top screw 5 at the bottom, the top screw 5 pushes the spring 6, driving the ball 4 so that it can contact the inner wall of the middle oblique groove 32, thereby slightly adjusting the gap between the left fixed plate 1, the right fixed plate 2 and the middle telescopic plate 3;

[0026] In addition, during the relative movement of the left fixed plate 1, the right fixed plate 2 and the middle telescopic plate 3, part of the spring 6 will be compressed instantaneously. At this time, the ball top adjustment component can reduce the instantaneous impact force, so that the vehicle has better stability when passing and less running noise.

[0027] See also Figure 6 As another solution, this embodiment provides a technical solution: a suspended empty rail expansion joint device, which is different from the previous embodiment in that a plurality of ball top adjustment components for contacting the limit stop bar 33 are also distributed and installed on the left fixed plate 1 and the right fixed plate 2. The cooperation between the ball top adjustment component and the limit stop bar 33 can further reduce the friction resistance, thereby improving the smoothness and stability of the track expansion joint change adjustment.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A suspended empty rail expansion joint device, characterized in that: It comprises a left fixed plate (1), a right fixed plate (2) and a middle telescopic plate (3), wherein both sides of the middle telescopic plate (3) are provided with middle guide strips (31) arranged obliquely, and a middle oblique groove (32) is formed between the middle guide strip (31) and the middle telescopic plate (3); The left fixed plate (1) and the right fixed plate (2) both have side guide strips (21) for cooperating with the corresponding middle oblique grooves (32), and a plurality of ball top adjustment assemblies for contacting the inner wall of the middle oblique grooves (32) are distributed and installed on the side guide strips (21).

2. A suspended empty rail expansion joint device according to claim 1, characterized in that: The left fixed plate (1) and its own side guide strip (21) form a side oblique groove (22) for cooperating with the corresponding middle guide strip (31), and the right fixed plate (2) and its own side guide strip (21) also form a side oblique groove (22) for cooperating with the corresponding middle guide strip (31).

3. A suspended empty rail expansion joint device according to claim 2, characterized in that: A limit stopper strip (33) is also extended from the outer side of the middle guide strip (31), and a limit guide groove (23) for cooperating with the limit stopper strip (33) is extended from the inner side of the side oblique groove (22).

4. A suspended empty rail expansion joint device according to claim 3, characterized in that: A plurality of ball top adjustment components for contacting the limit stop strip (33) are also distributed and installed on the left fixed plate (1) and the right fixed plate (2).

5. A suspended empty rail expansion joint device according to claim 4, characterized in that: The left fixing plate (1), the right fixing plate (2) and the side guide strip are provided with top adjustment holes (100). The ball top adjustment assembly comprises a ball (4) loaded in the top adjustment hole (100), a spring (6) and a top screw (5). The end of the top adjustment hole (100) away from the top screw (5) has a limiting ring for limiting the ball (4). One end of the spring (6) contacts the ball (4), and the other end of the spring (6) contacts the top screw (5).

6. A suspended empty rail expansion joint device according to claim 5, characterized in that: The top screw (5) is installed in the top adjustment hole (100) by threaded engagement, and a hexagonal groove is provided at the outer end of the top screw (5).

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