A three-dimensional multi-directional displacement comb tooth telescopic device

Abstract

The invention discloses a three-dimensional multi-directional displacement comb tooth expansion and contraction device, which belongs to the field of bridge expansion joint devices, and comprises corresponding comb tooth main tooth plates, comb tooth auxiliary tooth plates, main tooth fixing plates, and a movable connecting plate between the main tooth fixing plate and the comb tooth main tooth plate. A multi-directional displacement device is installed below the gap between the main tooth fixing plate and the comb tooth main tooth plate. The multi-directional displacement device comprises a spherical universal bearing, a connecting shaft, and an anchor connecting plate. The spherical universal bearing and the anchor connecting plate are staggeredly distributed on the same horizontal plane, and the connecting shaft connects the spherical universal bearing and the anchor connecting plate together, and at the same time connects the main tooth fixing plate with the comb tooth main tooth plate. The device has the advantages of extremely strong shock resistance, self-cleaning garbage, bolt-free installation, realization of longitudinal, transverse and vertical synchronous movement, and long service life.

Description

Technical Field

[0001] The invention discloses a three-dimensional multi-directional displacement comb-tooth expansion and contraction device, belonging to the field of bridge expansion joint devices. Background Art

[0002] The expansion device is an important component of the bridge. The rationality of its performance directly affects the bridge's expansion performance, bridge stability and service life, and plays a role in ensuring the comfort and safety of vehicles during passage. The current multi-directional displacement comb expansion device, the device for buffering the vertical force is mainly made of elastic materials, such as rubber pads, etc. The elastic material is easy to age and has a short service life; due to the lack of timely maintenance, the road garbage is filled and squeezed and cannot be cleaned in time, which affects the effective release of the accumulated energy of the bridge expansion displacement, etc., many expansion devices are damaged and the back wall of the bridge abutment is damaged. In severe cases, the beam head and beam are crushed and scrapped, causing safety hazards and traffic accidents; ordinary comb plate expansion joints are fixed and installed with bolts. Due to various reasons such as bridge creep and disturbance changes, the multi-directional displacement force of the expansion joint cannot be effectively released and twisted and deformed. Finally, the fixing bolts loosen and fall off and fail, resulting in the limited expansion function of the comb joint, the loss of the expansion function and the loss of the expansion joint, which affects the driving safety of vehicles and damages the bridge. In addition, the later maintenance and replacement is extremely complicated, the cleaning is difficult, and the maintenance time is long. Summary of the invention

[0003] The invention aims to disclose a three-dimensional multi-directional displacement comb tooth telescopic device which has extremely strong shock resistance, self-cleaning garbage, bolt-free installation, realizes longitudinal, transverse and vertical synchronous movement and has a long service life.

[0004] The present invention is achieved through the following technical solutions:

[0005] A three-dimensional multi-directional displacement comb tooth telescopic device comprises a corresponding comb tooth main tooth plate, a comb tooth auxiliary tooth plate, and a main tooth fixing plate. The main tooth fixing plate is movably connected to the comb tooth main tooth plate. A stainless steel plate is welded under the comb tooth auxiliary tooth plate. A support beam is welded under the comb teeth of the comb tooth auxiliary tooth plate. Corresponding anchor plates are respectively welded under the main tooth fixing plate and the comb tooth auxiliary tooth plate. A waterstop belt fixing frame is fixed under the comb tooth gap. A waterstop belt is installed on the waterstop belt fixing frame. A multi-directional displacement device is installed under the gap between the main tooth fixing plate and the comb tooth main tooth plate. The multi-directional displacement device comprises a spherical universal bearing, a connecting shaft, and an anchor connecting plate. The anchor connecting plate is provided with an axial hole matching the connecting shaft. The spherical universal bearing is fixed to the tail of the comb tooth main tooth plate. The anchor connecting plate is fixed under the main tooth fixing plate. The spherical universal bearing and the anchor connecting plate are staggered on the same horizontal plane. The connecting shaft connects the spherical universal bearing and the anchor connecting plate together, and at the same time connects the main tooth fixing plate to the comb tooth main tooth plate.

[0006] The above-mentioned three-dimensional multi-directional displacement comb tooth telescopic device is equipped with a limiting device under the comb tooth main tooth plate, and the limiting device includes a limit box and a round head bolt. The limit box is fixed on a support beam welded to the comb tooth auxiliary tooth plate under the comb teeth, and a guide groove is provided on the top surface of the limit box. The round head bolt is fastened under the comb tooth main tooth plate, and the round head bolt can move along the guide groove.

[0007] The above-mentioned three-dimensional multi-directional displacement comb tooth telescopic device has a round head bolt passing through the guide groove on the limit box, and its nut is below the guide groove. A steel pad and a polytetrafluoroethylene plate are sleeved on it to limit the telescopic movement of the comb tooth main tooth plate within the range of the guide groove.

[0008] In the above-mentioned three-dimensional multi-directional displacement comb teeth telescopic device, there are at least two groups of spherical universal bearings and anchoring connecting plates.

[0009] In the above-mentioned three-dimensional multi-directional displacement comb teeth telescopic device, limit springs are installed at both ends of the connecting shaft.

[0010] In the above-mentioned three-dimensional multi-directional displacement comb teeth telescopic device, the comb teeth of the comb teeth main tooth plate and the comb teeth auxiliary tooth plate are milled into large inclination angles, so that the garbage in the comb teeth gaps can be automatically cleaned when the comb teeth are telescopic.

[0011] The comb teeth telescopic device adopting this structure has the following advantages:

[0012] 1. The anchor plate is fixedly welded to the main tooth plate and main tooth fixing plate of the comb teeth. Steel bars are inserted in the middle of the arched anchor plate to increase the firmness of the overall device. The stainless steel plate is also connected by riveting and welding, which is more firm and reliable. At the same time, welded support beams are used to support the comb teeth, so that the telescopic device can be more evenly stressed during the external force impact and rolling process.

[0013] 2. The spherical universal bearing in the multi-directional displacement device is a special structural sliding bearing with a simple structure. It is mainly composed of an outer spherical inner ring and an inner spherical outer ring. It can withstand large loads. According to its type and structure, it can withstand radial loads, axial loads or radial and axial loads. It is used for low-speed swinging motion, that is, angular motion. Due to the spherical shape of the sliding surface, it can also make tilting motion within a certain angle range, that is, self-aligning motion. It can still work normally when the concentricity between the support shaft and the shaft housing hole is large; this device can be applied to more complex natural geographical environments, and ensure the expansion and contraction of bridges and traffic safety under severe weather, natural temperature differences and large climates. The settlement of the road surface and the continuous impact caused by heavy vehicles can be buffered and released through multi-directional displacement motion to accumulate multi-directional stress energy, which greatly alleviates the damage to the bridge from forces from different directions and greatly increases the seismic resistance.

[0014] 3. The limit springs installed at both ends of the connecting shaft are mainly used to limit the lateral movement of the comb teeth, that is, the displacement change in the direction of the bridge deck width.

[0015] 4. The limit device under the main tooth plate of the comb teeth, the steel pad and the PTFE plate on the round head bolt nut limit the expansion and contraction of the comb teeth within the guide groove, and at the same time ensure that the main telescopic tooth plate across the gap will not rise and fall significantly when the vehicle is open to traffic, playing a limiting role, avoiding the expansion and contraction of the main teeth across the gap during the passage of vehicles, causing the telescopic system to move asynchronously, and at the same time keeping the expansion and contraction of the comb teeth gap within a reasonable range.

[0016] 5. The comb teeth with large inclined angles on the main tooth plate and the auxiliary tooth plate can automatically clean the garbage in the comb tooth gap when the comb teeth are extended and retracted, so as to prevent the garbage from not being cleaned in time and affecting the energy accumulated in the bridge expansion and retraction displacement, which will not be effectively released, causing damage to the expansion and retraction device and the bridge, which may easily cause safety hazards and traffic accidents.

[0017] This new three-dimensional multi-directional reversible comb-tooth telescopic device has better seismic resistance and durability than ordinary single-function comb-tooth joints, more efficient free telescopic force release function, longer bridge service life and ensures vehicle driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the three-dimensional multi-directional displacement comb teeth telescopic device of the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0020] Figure 3 It is a schematic structural diagram of the limiting device of the present invention.

[0021] Figure 4 for Figure 1 Schematic diagram of the structure when the main comb tooth plate and the auxiliary comb tooth plate are separated. DETAILED DESCRIPTION

[0022] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4A three-dimensional multi-directional displacement comb tooth telescopic device comprises a corresponding comb tooth main tooth plate 2, a comb tooth auxiliary tooth plate 1, and a main tooth fixing plate 3. The main tooth fixing plate 3 is movably connected with the comb tooth main tooth plate 2. A stainless steel plate 4 is welded under the comb tooth auxiliary tooth plate 1. A support beam 5 presses the stainless steel plate 4 and is welded to the comb teeth of the comb tooth auxiliary tooth plate. During the telescopic process of the cross-slit comb tooth main tooth plate 2 and the comb tooth auxiliary tooth plate 1, they will be kept on the same horizontal plane without being out of touch. The limit box 71 on the limit device 7 has a guide groove 73, and the round head bolt 72 is fastened under the comb tooth main tooth plate 2. The round head bolt 72 can move along the guide groove 73 to limit the expansion and contraction of the comb tooth main tooth plate along the bridge direction and the vertical rise and fall. The round head bolt nut is under the guide groove, and a steel pad 74 and a polytetrafluoroethylene plate 75 are sleeved on it to limit the expansion and contraction of the comb tooth main tooth plate within the range of the guide groove, while ensuring that the cross-slot comb tooth main tooth plate 2 will not rise and fall significantly when the traffic is open, thereby playing a limiting role; the multi-directional displacement device 6 includes a spherical universal bearing 12, a connecting The shaft 11 and the anchoring connecting plate 13 are provided with a shaft hole matching the connecting shaft 11. The spherical universal bearing 12 is fixed to the tail of the comb tooth main tooth plate 2. The anchoring connecting plate 13 is fixed to the bottom of the main tooth fixing plate 3. The spherical universal bearing 12 and the anchoring connecting plate 13 are staggered on the same horizontal plane. The connecting shaft 11 connects the spherical universal bearing 12 and the anchoring connecting plate 13 together, and at the same time connects the main tooth fixing plate to the comb tooth main tooth plate. There are also limit springs 14 at both ends of the connecting shaft 11 to limit the lateral displacement of the bridge. The anchoring plates 15 welded on the comb tooth auxiliary tooth plate 1 and the main tooth fixing plate 3 are all arched, with a rib hole in the middle, which is conducive to increasing firmness and earthquake resistance. The waterstop fixing frame 9 and the U-shaped threaded steel bar 8 jointly fix the waterstop 10, and the waterstop device and the comb tooth telescopic device are installed separately. There are five groups of spherical universal bearings and anchor connecting plates; the comb teeth of the main tooth plate and the auxiliary tooth plate are milled into large inclined sharp angles so that the garbage in the comb tooth gap can be automatically cleaned when the comb teeth are extended and retracted; limit springs 14 are installed at both ends of the connecting shaft, mainly to limit the displacement change of the comb tooth gap in lateral movement, that is, in the direction of the bridge deck width.

Claims

1. A three-dimensional multi-directional displacement comb tooth telescopic device, comprising a corresponding comb tooth main tooth plate, a comb tooth auxiliary tooth plate, and a main tooth fixing plate, the main tooth fixing plate is movably connected to the comb tooth main tooth plate, a stainless steel plate is welded under the comb tooth auxiliary tooth plate, a support beam is welded under the comb teeth of the comb tooth auxiliary tooth plate, corresponding anchor plates are respectively welded under the main tooth fixing plate and the comb tooth auxiliary tooth plate, a water stop belt fixing frame is fixed under the comb tooth gap, and a water stop belt is installed on the water stop belt fixing frame, characterized in that: A multi-directional displacement device is installed under the gap between the main tooth fixing plate and the comb tooth main tooth plate, and the multi-directional displacement device includes a spherical universal bearing, a connecting shaft, and an anchor connecting plate. The anchor connecting plate is provided with an axial hole matching the connecting shaft. The spherical universal bearing is fixed to the tail of the comb tooth main tooth plate, and the anchor connecting plate is fixed under the main tooth fixing plate. The spherical universal bearing and the anchor connecting plate are staggered on the same horizontal plane. The connecting shaft connects the spherical universal bearing and the anchor connecting plate together, and at the same time connects the main tooth fixing plate to the comb tooth main tooth plate.

2. A three-dimensional multi-directional displacement comb teeth telescopic device according to claim 1, characterized in that: A limit device is installed under the main tooth plate of the comb teeth. The limit device includes a limit box and a round head bolt. The limit box is fixed on a support beam welded under the comb teeth of the auxiliary tooth plate of the comb teeth. A guide groove is provided on the top surface of the limit box. The round head bolt is fastened under the main tooth plate of the comb teeth, and the round head bolt can move along the guide groove.

3. A three-dimensional multi-directional displacement comb teeth telescopic device according to claim 2, characterized in that: The round head bolt passes through the guide groove on the limit box, and the nut thereof is below the guide groove, and a steel backing plate and a PTFE plate are sleeved on the top thereof to limit the expansion and contraction of the comb main tooth plate within the range of the guide groove.

4. A three-dimensional multi-directional displacement comb teeth telescopic device according to claim 1, 2 or 3, characterized in that: There are at least two sets of spherical universal bearings and anchoring connecting plates.

5. The three-dimensional multi-directional displacement comb teeth telescopic device according to claim 4, characterized in that: Limit springs are installed at both ends of the connecting shaft.

6. A three-dimensional multi-directional displacement comb teeth telescopic device according to claim 1 or 2 or 3 or 5, characterized in that: The comb teeth of the main comb tooth plate and the auxiliary comb tooth plate are milled into a large inclination angle, so that the garbage in the comb tooth gap can be automatically cleaned when the comb teeth are extended and retracted.

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