Large-displacement comb plate multidirectional displacement telescopic device easy to replace

Abstract

The utility model provides a large-displacement comb plate multidirectional displacement telescopic device easy to replace, which comprises a first fixed tooth plate fixed on a beam body on one side of a beam end gap and a second fixed tooth plate fixed on the beam body on the other side of the beam end gap, the lower part of the first fixed toothed plate is fixed on the beam body through a base; the first fixed toothed plate and the base are movably clamped with a rotating shaft at the connecting end of the movable toothed plate; and the rotating shaft and the movable toothed plate are of an integrated structure. And the other end of the movable toothed plate is matched, crossed and overlapped with the comb teeth of the second fixed toothed plate. A toothed plate base plate is arranged on the beam body on the lower portion of the second fixed toothed plate, and a sliding plate is arranged between the toothed plate base plate and the second fixed toothed plate. A waterproof assembly is fixedly arranged in the beam end gap. According to the telescopic device, the first fixed toothed plate and the base are matched and are rotationally connected with the movable toothed plate in a shaft hole matching mode, use of a rotating shaft structure is avoided, the device structure is simplified, stress concentration is avoided, and the structural strength is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge expansion devices, in particular to a large-displacement and easily replaceable comb-tooth plate multi-directional displacement expansion device. Background Technique

[0002] The bridge expansion device is an important connecting component between the beam ends of the bridge. The quality and performance of this device will directly affect the durability of the entire bridge. The large-displacement comb-tooth plate type expansion device needs to meet the requirements of the bridge displacement and multi-directional displacement, and the anchoring performance, bearing capacity, etc. need to meet the use requirements. In the prior art, the large-displacement comb-tooth plate type expansion device usually uses a rotating shaft structure as the displacement device for the vertical displacement of the expansion device, and is fixed by welding the rotating shaft to the movable tooth plate. The welding part is easily the stress concentration part, there is a stress concentration phenomenon, and it is easily damaged during use.

[0003] In addition, the existing anchoring method of the comb-tooth plate is usually bolt connection, which is fastened by anchor bolts and nuts. During use, the thread of the anchor bolt is often damaged due to the frequent vibration of passing vehicles. Once damaged, the entire set of tooth plates must be taken out and reinstalled, which consumes manpower and material resources and blocks traffic for a long time.

[0004] Therefore, those skilled in the art urgently need to design a comb-tooth plate multi-directional displacement expansion device that can simplify the rotating structure and whose comb-tooth plate connection structure is easy to replace and maintain. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a large-displacement and easily replaceable comb-tooth plate multi-directional displacement expansion device to solve the problems that the rotating shaft of the movable tooth plate in the prior art is prone to stress concentration and damage, and the connecting anchor bolt of the comb-tooth plate is prone to damage and the maintenance and replacement are cumbersome and complex.

[0006] The utility model provides a large-displacement and easily replaceable comb-tooth plate multi-directional displacement expansion device. The expansion device includes a first fixed tooth plate fixed on the beam body on one side of the beam end gap and a second fixed tooth plate fixed on the beam body on the other side of the beam end gap. The lower part of the first fixed tooth plate is fixed on the beam body through a base; the first fixed tooth plate is movably clamped with the rotating shaft at the connecting end of the movable tooth plate, and the rotating shaft and the movable tooth plate are of an integrated structure; the other end of the movable tooth plate is cross-lapped with the comb teeth of the second fixed tooth plate; a tooth plate cushion plate is arranged on the beam body at the lower part of the second fixed tooth plate, and a sliding plate is arranged between the tooth plate cushion plate and the second fixed tooth plate; a waterproof component is fixedly arranged in the beam end gap.

[0007] Furthermore, the lower part of one side of the first fixed tooth plate close to the beam end gap has an arc-shaped groove, and the upper part of one side of the base close to the beam end gap has a corresponding arc-shaped groove. The two arc-shaped grooves cooperate to form a connecting cavity. The rotating shaft at the connecting end of the movable tooth plate is a convex end, and the convex end can be embedded in the connecting cavity and rotate relative to the first fixed tooth plate and the base.

[0008] Furthermore, a lateral rotation gap is reserved between the shoulders of the movable tooth plate and the first fixed tooth plate; a vertical and lateral rotation gap is reserved between the shoulders of the movable tooth plate and the base; elastic sealing layers are arranged in the rotation gaps.

[0009] Furthermore, a displacement anchoring assembly is fixedly arranged on the side wall of the base, and the displacement anchoring assembly is connected with the movable tooth plate in a limiting manner.

[0010] Furthermore, the displacement anchoring assembly includes an upper flat plate fixed at the bottom of the base. Corresponding through holes are provided on both the upper flat plate and the movable tooth plate. One end of a connecting bolt is inserted into the through hole on the movable tooth plate and extends out from the through hole on the upper flat plate. A spring is sleeved on the extending part of the connecting bolt and is limited by a fixing piece. The diameter of the other end of the connecting bolt is larger than the through hole on the movable tooth plate.

[0011] Furthermore, a transition cushion plate is fixedly arranged between the upper flat plate and the base.

[0012] In an embodiment of the present utility model, a buffer cushion plate is arranged between the tooth plate cushion plate and the sliding plate.

[0013] In an embodiment of the present utility model, a plurality of sleeves are fixedly arranged at the bottom of the tooth plate cushion plate. The sleeves have threaded holes, and a plurality of limiting rings are arranged on the outer wall of the sleeves along the axial direction. An anchor rod is threadedly connected to the lower end of the sleeve. The upper end of the sleeve is fixedly connected to the second fixed tooth plate through a bolt.

[0014] In an embodiment of the present utility model, the threaded hole is of a straight cylinder structure.

[0015] In an embodiment of the present utility model, the threaded hole is of a stepped structure, and the diameter of the threaded hole gradually becomes larger along the axial direction of the threaded hole.

[0016] According to the above embodiments, the large-displacement and easily replaceable comb tooth plate multi-directional displacement expansion device provided by the present utility model has at least the following benefits: The expansion device realizes the rotational connection between the fixed tooth plate and the movable tooth plate through the shaft hole matching method, avoids the use of a rotating shaft structure, simplifies the device structure, avoids stress concentration, and improves the strength of the structure.

[0017] In addition, the sleeves provided on the tooth plate backing plate are respectively connected to the anchor bolts and the bolts for fixedly connecting the fixed tooth plates. During long-term use, only the bolts for fixedly connecting the fixed tooth plates are damaged by the vibration of the traveling crane. The device can be maintained by replacing these bolts, without the need to disassemble the entire set of comb tooth plates, greatly reducing the maintenance time and cost.

[0018] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and cannot limit the scope claimed by the present invention. Brief Description of the Drawings

[0019] The following drawings are part of the specification of the present invention, which illustrate exemplary embodiments of the present invention. The attached drawings, together with the description of the specification, are used to explain the principle of the present invention.

[0020] Figure 1 It is a top view of the large-displacement and easily replaceable comb tooth plate multi-directional displacement expansion device provided by the present invention.

[0021] Figure 2 It is a side cross-sectional view of the large-displacement and easily replaceable comb tooth plate multi-directional displacement expansion device provided by the present invention.

[0022] Figure 3 It is a partial cross-sectional view of the connection structure of the movable tooth plate of the large-displacement and easily replaceable comb tooth plate multi-directional displacement expansion device provided by the present invention.

[0023] Figure 4 It is a partial cross-sectional view of the displacement anchoring assembly of the large-displacement and easily replaceable comb tooth plate multi-directional displacement expansion device provided by the present invention.

[0024] Figure 5 It is a schematic structural diagram of Embodiment 1 of the fixing structure of the tooth plate backing plate of the large-displacement and easily replaceable comb tooth plate multi-directional displacement expansion device provided by the present invention

[0025] Figure 6 It is a schematic structural diagram of Embodiment 2 of the fixing structure of the tooth plate backing plate of the large-displacement and easily replaceable comb tooth plate multi-directional displacement expansion device provided by the present invention.

[0026] Description of the Reference Numerals:

[0027] 1 - First fixed tooth plate, 2 - Second fixed tooth plate, 3 - Base, 4 - Movable tooth plate, 5 - Tooth plate backing plate, 6 - Sliding plate, 7 - Waterproof assembly, 8 - Displacement anchoring assembly, 9 - Buffer backing plate, 10 - Beam body, 11 - Sleeve, 12 - Anchor bolt;

[0028] 41 - Raised end;

[0029] 81 - Upper flat plate, 82 - Connecting bolt, 83 - Spring, 84 - Fixing part, 85 - Fixing pin, 86 - Washer, 87 - Transition backing plate. Detailed implementation manners

[0030] The various exemplary implementation manners of the present utility model will be described in detail below. This detailed description should not be considered as a limitation to the present utility model, but rather as a more detailed description of certain aspects, characteristics, and implementation schemes of the present utility model.

[0031] Without departing from the scope or spirit of the present utility model, various improvements and changes can be made to the specific implementation manners of the specification of the present utility model, which are obvious to those skilled in the art. Other implementation manners obtained from the specification of the present utility model are obvious to those skilled in the art. The specification and embodiments of this application are merely exemplary.

[0032] The present utility model provides a large-displacement and easily replaceable comb-tooth plate multi-directional displacement expansion device, as Figure 1 and 2 shown in the structural schematic diagram of the expansion device. In the specific implementation manners, the expansion device includes a first fixed tooth plate 1 fixed on the beam body 10 on one side of the beam end gap and a second fixed tooth plate 2 fixed on the beam body 10 on the other side of the beam end gap. The lower part of the first fixed tooth plate 1 is fixed on the beam body 10 through a base 3, and the first fixed tooth plate 1 and the base 3 are fixedly connected by bolts.

[0033] The first fixed tooth plate 1 is movably clamped with the rotating shaft at the connecting end of the movable tooth plate 4, and the rotating shaft and the movable tooth plate 4 are of an integrated structure. The other end of the movable tooth plate 4 crosses the beam end gap and is cross-lapped with the comb teeth of the second fixed tooth plate 2.

[0034] A tooth plate backing plate 5 is arranged on the beam body 10 at the lower part of the second fixed tooth plate 2. The tooth plate backing plate 5 is fixed on the beam body 10 and is used to provide a fixed installation platform for the second fixed tooth plate 2. A sliding plate 6 is arranged between the tooth plate backing plate 5 and the second fixed tooth plate 2. In this embodiment, the sliding plate 6 is a stainless steel plate, and the stainless steel plate contacts the bottom of the movable tooth plate 4, facilitating the displacement and sliding of the movable tooth plate 4.

[0035] In addition, a buffer backing plate 9 is arranged between the tooth plate backing plate 5 and the sliding plate 6, which is used to play a role in buffering, shock absorption, and noise reduction when the vehicle passes, avoid rigid connection, and reduce the damage to the device caused by friction and vibration.

[0036] A waterproof component 7 is fixedly arranged in the beam end gap, and both ends of the waterproof component 7 are respectively fixed on the two side walls of the beam end gap.

[0037] Furthermore, as Figure 3As shown in the figure, the lower part of one side of the first fixed tooth plate 1 close to the beam end gap has an arc-shaped groove, and the upper part of one side of the base 3 close to the beam end gap has a corresponding arc-shaped groove. The two arc-shaped grooves cooperate to form a connecting cavity.

[0038] The rotating shaft at the connecting end of the movable tooth plate 4 is a convex end 41. The convex end 41 can be embedded into the connecting cavity, can rotate vertically with the beam body, and can rotate relative to the first fixed tooth plate 1 and the base 3. Specifically, the convex end is a round shaft structure, extends horizontally along the movable tooth plate 4, and is integrally processed with the movable tooth plate 4.

[0039] When installing the movable tooth plate 4, first place the movable tooth plate 4 into the arc-shaped groove on the base 3, then cover the first fixed tooth plate 1 on the base 3, and fixedly connect the first fixed tooth plate 1 and the base 3 through bolts. At this time, the convex end 41 of the movable tooth plate 4 will be embedded into the cavity and can rotate relative to the first fixed tooth plate 1 and the base 3.

[0040] Furthermore, a lateral rotation gap is reserved between the shoulder of the movable tooth plate 4 and the first fixed tooth plate 1. Vertical and lateral rotation gaps are reserved between the shoulder of the movable tooth plate 4 and the base 3. Setting the rotation gap can minimize the occurrence of rigid contact between the movable tooth plate 4 and the first fixed tooth plate 1 and the base 3 during rotation.

[0041] In addition, elastic sealing layers are provided in the rotation gaps to avoid the situation of rigid contact when the movable tooth plate 4 rotates and avoid damage caused by rigid contact.

[0042] Furthermore, as Figure 4 shown in the figure, a displacement anchoring assembly 8 is fixedly arranged on the base 3. The displacement anchoring assembly 8 is in limit connection with the movable tooth plate 4. The anchoring assembly 8 is arranged at the bottom of the movable tooth plate 4 and is fixed to the lower part of the base 3 for limiting the rotation amount of the movable tooth plate 4.

[0043] Furthermore, the displacement anchoring assembly 8 includes an upper flat plate 81 fixed to the bottom of the base 3. The upper flat plate 81 is parallel to the movable tooth plate 4 in a flat-laid state.

[0044] Both the upper flat plate 81 and the movable tooth plate 4 have corresponding through holes. One end of the connecting bolt 82 is inserted into the through hole on the movable tooth plate 4 and extends out from the through hole on the upper flat plate 81. A spring 83 is sleeved on the extending part of the connecting bolt 82, and the spring 83 is limited by a fixing member 84. In addition, the diameter of the other end of the connecting bolt 82 is larger than the through hole on the movable tooth plate 4.

[0045] In this embodiment, the diameters of the through holes on the upper flat plate 81 and the movable tooth plate 4 are larger than the diameter of the connecting bolt 82 to avoid the through holes applying a bending force to the connecting bolt 82 when the movable tooth plate 4 rotates, thereby damaging the connecting bolt 82.

[0046] The fixing member 84 is a nut, which is fixedly connected to the protruding end of the connecting bolt 82 by threading. In addition, a pin hole is also provided near the protruding end of the connecting bolt 82, and the fixing member 84 is restricted from loosening by arranging a fixing pin 85.

[0047] In addition, two washers 86 are arranged on the connecting bolt 82, respectively located at both ends of the spring 83, providing a platform for applying elastic force to the spring 83, and the outer diameter of the washer 86 is larger than the diameter of the through hole on the upper flat plate 81.

[0048] During the use process, the spring 83 will apply a certain pre-tightening pressure to the movable tooth plate 4 through the connecting bolt 82. As the movable tooth plate 4 rotates up and down, the spring 83 will recover or be further compressed.

[0049] Furthermore, a transition backing plate 87 is fixedly arranged between the upper flat plate (81) and the base (3). The upper flat plate 81, the transition backing plate 87 and the base 3 are fixed together by bolts.

[0050] In this embodiment, the transition backing plate 87 connects multiple bases 3 into one body by bolts. The upper flat plate 81 is provided with oblong holes, and the bolts connect the transition backing plate 87 and the base 3 through the oblong holes.

[0051] The upper flat plate 81 is fixedly connected to the beam body 10. The bolts connected to the expansion device and the connecting bolt 82 are connected to the upper flat plate 1, and the oblong holes reserve a movable space. When the beam body 10 undergoes horizontal displacement, the upper flat plate 1 generates displacement and rotation along with the beam body 10, and the expansion device generates relative displacement along with the horizontal displacement of the beam body.

[0052] In the specific embodiment of the present utility model, a plurality of sleeves 11 are fixedly arranged at the bottom of the tooth plate backing plate 5. The sleeve 11 has a threaded hole penetrating along the axis, and a plurality of limiting rings are arranged on the outer wall of the sleeve 11 along the axial direction, so that the sleeve 11 is fixed more firmly in the concrete and is not easily detached due to the pulling force.

[0053] The lower end of the sleeve 11 is threadedly connected to the anchor bolt 12, and the upper end is fixedly connected to the second fixed tooth plate 2 by bolts. The anchor bolt 12 is used to connect with the beam body or the embedded steel bars.

[0054] The threaded length of the sleeve is n times the effective fastening length dimension of the bolt, where n is the number of bolt replacement times, which is convenient for maintenance and replacement of the bolt. After the expansion device is used for a long time, the high-frequency rolling vibration of the vehicle is likely to cause the bolt to loosen or even become disengaged, and the thread is damaged. Then, replacing the lengthened bolt is sufficient.

[0055] In this embodiment, the tooth plate backing plate 5 has a plurality of fixing holes, and the sleeves 11 are fixedly arranged in the fixing holes. The sleeves 11 extend downward, and the upper end surface of the sleeve 11 is lower than or equal to the upper plane of the tooth plate backing plate 5.

[0056] Such asFigure 5 Shown is an embodiment of the sleeve. In this embodiment, the threaded hole has a straight cylinder structure.

[0057] As Figure 6 Shown is another embodiment of the sleeve. In this embodiment, the threaded hole has a stepped structure. Along the axial direction of the threaded hole upwards, the diameter of the threaded hole gradually becomes larger. Specifically, the threaded hole of the sleeve is set in a stepped pattern. The bottom threaded hole is the safety threaded diameter size calculated by design. For the next higher step, the threaded diameter size increases by one gradient, and the threaded diameter increases successively upwards. If the thread is damaged, a bolt with a larger diameter is replaced for connecting the second fixed tooth plate, which is simple, quick to replace and has a more reliable safety performance.

[0058] The above are only the schematic specific embodiments of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by any person skilled in the art shall fall within the scope of protection of the present invention.

Claims

1. A large-displacement and easily replaceable comb tooth plate multi-directional displacement telescopic device, characterized in that The telescopic device includes a first fixed tooth plate (1) fixed on a beam body (10) on one side of the beam end gap and a second fixed tooth plate (2) fixed on the beam body (10) on the other side of the beam end gap. The lower part of the first fixed tooth plate (1) is fixed on the beam body (10) through a base (3); The first fixed tooth plate (1) is movably clamped with a rotating shaft at the connecting end of a movable tooth plate (4). The rotating shaft and the movable tooth plate (4) are of an integral structure; The other end of the movable tooth plate (4) is cross-lapped with the comb teeth of the second fixed tooth plate (2) in a matching manner; A tooth plate cushion plate (5) is arranged on the beam body (10) at the lower part of the second fixed tooth plate (2), and a sliding plate (6) is arranged between the tooth plate cushion plate (5) and the second fixed tooth plate (2); A waterproof component (7) is fixedly arranged in the beam end gap.

2. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 1, characterized in that The lower part of one side of the first fixed tooth plate (1) close to the beam end gap has an arc-shaped groove, and the upper part of one side of the base (3) close to the beam end gap has a corresponding arc-shaped groove. The two arc-shaped grooves cooperate to form a connecting cavity; The rotating shaft at the connecting end of the movable tooth plate (4) is a convex end (41), and the convex end (41) can be embedded into the connecting cavity and rotate relative to the first fixed tooth plate (1) and the base (3).

3. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 2, characterized in that, A lateral rotation gap is reserved between the shoulder of the movable tooth plate (4) and the first fixed tooth plate (1); Vertical and lateral rotation gaps are reserved between the shoulder of the movable tooth plate (4) and the base (3); Elastic sealing layers are arranged in the rotation gaps.

4. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 2 or 3, characterized in that, A displacement anchoring component (8) is fixedly arranged on the base (3), and the displacement anchoring component (8) is in a limit connection with the movable tooth plate (4).

5. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 4, characterized in that, The displacement anchoring component (8) includes an upper flat plate (81) fixed at the bottom of the base (3). Corresponding through holes are arranged on both the upper flat plate (81) and the movable tooth plate (4). One end of a connecting bolt (82) is inserted into the through hole on the movable tooth plate (4) and extends out from the through hole on the upper flat plate (81). A spring (83) is sleeved on the extending part of the connecting bolt (82), and a limit is carried out through a fixing part (84); The diameter of the other end of the connecting bolt (82) is larger than the through hole on the movable tooth plate (4).

6. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 5, characterized in that, A transition cushion plate (87) is fixedly arranged between the upper flat plate (81) and the base (3).

7. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 1, characterized in that, A buffer cushion plate (9) is arranged between the tooth plate cushion plate (5) and the sliding plate (6).

8. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 1, characterized in that, A plurality of sleeves (11) are fixedly arranged at the bottom of the tooth plate cushion plate (5). The sleeves (11) have threaded holes, and a plurality of limit rings are arranged on the outer wall of the sleeves (11) along the axial direction; The lower end of the sleeve (11) is threadedly connected with an anchor rod (12); The upper end of the sleeve (11) is fixedly connected with the second fixed tooth plate (2) through a bolt.

9. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 8, wherein, The threaded hole is of a straight cylinder structure.

10. The large-displacement and easily replaceable comb-tooth plate multi-directional displacement telescopic device according to claim 8, wherein The threaded hole is of a stepped structure, and the diameter of the threaded hole gradually becomes larger along the axial direction of the threaded hole.

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