A crawler sliding device

Abstract

The present invention discloses a crawler sliding device, which belongs to the field of mechanical technology, and comprises a base, a crawler provided on the base, and a transmission structure for driving the crawler to rotate. The base is provided with a sliding base, and the inner side of the crawler can slide against the sliding base. In view of the technical problems of cumbersome steps and high labor costs in the manual feeding of slide plates in the bridge jacking construction in the prior art, the present invention provides a crawler sliding device, which can automatically feed slide plates, greatly reduce the number of construction workers in the bridge jacking process, and improve construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a crawler type sliding device. Background Art

[0002] Bridge jacking construction technology is widely used in bridge construction, mainly in the form of dragging, jacking and tightening. At present, the most commonly used is to drive the slide plate under the bridge beam body, feed the slide plate manually, so that the slide plate and the fixed seat smooth surface friction to reduce resistance, but the problem is that each sliding point needs to be equipped with personnel to feed the slide plate manually, which requires more personnel and high labor costs, and there are human factors that fail to feed the slide plate, resulting in interruption of construction. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] In view of the technical problems in the prior art of complicated steps and high labor costs in manually feeding slide plates during bridge jacking construction, the present invention provides a crawler sliding device which can automatically feed slide plates, greatly reducing the number of construction workers during bridge jacking and improving construction efficiency.

[0005] 2. Technical solution

[0006] To solve the above problems, the technical solution provided by the present invention is:

[0007] A crawler sliding device comprises a base, a crawler arranged on the base and a transmission structure for driving the crawler to rotate, wherein the base is provided with a sliding base, and the inner side of the crawler can slide against the sliding base; the structure of the crawler sliding device can not only improve the stability of the bridge during movement, but also increase the speed of bridge erection, shorten the construction period, and the bridge moves in a horizontal manner.

[0008] Optionally, the crawler track includes a transmission chain and a plurality of slide plates arranged along the rotation direction of the transmission chain, and the transmission chain is provided with a group of slide plates on each side of the slide plate.

[0009] Optionally, the sliding base is provided with a sliding surface that abuts against the inner side of the track, and a first guide surface and a second guide surface are respectively provided on both sides of the sliding surface.

[0010] Optionally, the slide plate includes a polytetrafluoroethylene layer in contact with the sliding base and a rubber wear-resistant layer in contact with the bridge.

[0011] Optionally, a supporting steel plate is also provided in the slide plate.

[0012] Optionally, a polished stainless steel layer is provided on the contact surface between the sliding base and the track.

[0013] Optionally, the transmission structure includes at least two sprockets meshing with the transmission chain, and the sprockets are fixed to the base via pins.

[0014] Optionally, a mounting seat is provided below the sliding base, the mounting seat is arranged in the base, a first gap for mounting a sprocket is provided between a side wall of the mounting seat and the base, and a second gap for a transmission chain to pass through is provided between a bottom of the mounting seat and the base.

[0015] Optionally, the transmission chain is provided with a plurality of wing plates abutting against the slide plate, and the wing plates are fixedly connected to the slide plate by fasteners.

[0016] Optionally, a fixed plate is provided on the transmission chain corresponding to the other side of the wing plate, and a limiting wheel is rotatably connected between the wing plate and the fixed plate, and the limiting wheel is rotatably pressed against the inner wall of the base.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] (1) Compared with the existing technology of manually feeding the slide plate, the technical solution of the present invention can realize automatic feeding of the slide plate during bridge pushing, which greatly reduces the number of construction workers in the process of bridge pushing, and can also avoid the interruption of pushing due to the failure of workers to feed the slide plate in time, thereby improving construction efficiency.

[0020] (2) Compared with the existing steel roller sliding technology, the steel roller sliding has insufficient bearing capacity and is only used for light steel structure bridges. The bearing contact is line contact, the pressure is relatively high, which causes great damage to the paint on the bottom of the steel beam and has high requirements for the flatness of the bottom of the steel beam. The technical solution of the present invention has a large surface contact bearing capacity, and the contact surface between the slide plate and the bridge is made of wear-resistant rubber. It can operate normally on tiny protrusions on the bottom of the steel beam, and has higher overall usability.

[0021] (3) The crawler sliding device structure adopted in the present invention can not only improve the stability of the bridge during movement, but also increase the speed of bridge erection and shorten the construction period. The bridge moves in a horizontal manner. Compared with the manual feeding method, the bridge moves horizontally. There is no need to lift the bridge frequently to change the movement direction of the bridge, which effectively ensures the accuracy of the displacement direction of the bridge and greatly reduces the number of construction workers during the bridge pushing process. The automatic displacement of the bridge can be achieved by only fixing the device.

[0022] (4) The setting of the sliding base allows the pressure on the crawler to be transmitted to the base through the sliding base when the bridge is erected on the crawler. Compared with the traditional bridge, the pressure on the crawler is directly applied to the transmission structure. During the movement of the bridge, the transmission structure needs to overcome a large pressure to control the rotation of the crawler. The transmission structure is very easy to be damaged, resulting in interruption or deviation of the bridge transportation. At the same time, the sliding base increases the contact area between the crawler and the bridge ground. The middle part of the crawler will not sag due to gravity. The crawler can drive the bridge to move more stably during the rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the decomposition of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the sliding base in the present invention;

[0026] Figure 4 It is a partial structural schematic diagram of the transmission chain in the present invention;

[0027] Figure 5 It is a partial cross-sectional view of the present invention.

[0028] 1. Base; 2. Track; 21. Transmission chain; 211. Wing plate; 212. Fixed plate; 22. Slide plate; 221. Polytetrafluoroethylene layer; 222. Rubber wear-resistant layer; 223. Support steel plate; 3. Transmission structure; 31. Sprocket; 32. Pin; 4. Sliding base; 41. Sliding surface; 42. First guide surface; 43. Second guide surface; 5. Mounting seat; 6. First gap; 7. Second gap; 8. Fastener; 9. Limiting wheel. DETAILED DESCRIPTION

[0029] To further understand the content of the present invention, Figure 1-5 The present invention is described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] Combined with Figure 1-5 A crawler sliding device of this embodiment includes a base 1, a crawler 2 arranged on the base 1 and a transmission structure 3 for driving the crawler 2 to rotate. A sliding base 4 is provided on the base 1, and the inner side of the crawler 2 can slide against the sliding base 4.

[0032] The working method of this embodiment is: the bridge is driven by continuously pushing the jack, and the bridge is placed on a sliding support. When the bridge moves forward, the friction resistance between the bottom of the bridge and the rubber on the support is greater than the friction resistance between the stainless steel plate and the polytetrafluoroethylene, so the bridge drives the slide plate to move.

[0033] By placing the moving object on the crawler 2, the friction between the crawler 2 and the bridge drives the bridge to move. The structure of the crawler sliding device can not only improve the stability of the bridge when it moves, but also increase the speed of bridge erection and shorten the construction period. The bridge moves in a horizontal manner. Compared with the method of manual feeding, the bridge moves horizontally. There is no need to lift the bridge frequently to change the movement direction of the bridge, which effectively ensures the accuracy of the displacement direction of the bridge and greatly reduces the number of construction workers in the process of bridge pushing. The automatic displacement of the bridge can be achieved by only fixing the device; The setting of the sliding base 4 allows the pressure on the crawler 2 to be transmitted to the base 1 through the sliding base 4 when the bridge is erected on the crawler 2. Compared with the traditional bridge, the pressure on the crawler 2 will be directly applied to the transmission structure 3. During the movement of the bridge, the transmission structure 3 needs to overcome a large pressure to control the rotation of the crawler 2. The transmission structure 3 is very easy to be damaged, resulting in interruption or deviation of the bridge transportation. At the same time, the sliding base 4 increases the contact area between the crawler 2 and the bridge ground. The middle part of the crawler 2 will not sag due to gravity. The crawler 2 can move more stably and synchronously with the bridge during rotation.

[0034] Example 2

[0035] Combined with Figure 1-5 , a crawler sliding device in this embodiment, compared with embodiment 1, the crawler 2 includes a transmission chain 21 and a plurality of slide plates 22 arranged along the rotation direction of the transmission chain 21, and the transmission chain 21 is provided with a group of slide plates 22 on both sides.

[0036] When the transmission chain 21 rotates on the transmission structure 3, the transmission chain 21 can drive the skateboard 22 to rotate to the bottom of the bridge, and drive the bridge to move together in the subsequent rotation process. Several skateboards 22 continuously enter from one side of the bridge to the bottom of the bridge to drive the bridge to move; the transmission chain 21 is provided with a group on each side of the skateboard 22, so that the skateboard 22 is stably stressed on both sides, and the skateboard 22 has better stability when driving the bridge to move.

[0037] Example 3

[0038] Combined with Figure 1-5 In the crawler type sliding device of this embodiment, compared with the embodiment 1 or 2, the sliding base 4 is provided with a sliding surface 41 which abuts against the inner side of the crawler 2, and the sliding surface 41 is provided with a first guide surface 42 and a second guide surface 43 on both sides thereof.

[0039] When the track 2 drives the bridge to move horizontally, the track 2 will be pressed tightly against the sliding base 4 under the action of the bridge pressure. The first guide surface 42 and the second guide surface 43 are arranged to facilitate the slide plate 22 to enter the sliding surface 41 during the rotation process. In the process of the slide plate 22 rotating from vertical to horizontal, the slide plate 22 can gradually complete the rotation process on the first guide surface 42 or the second guide surface 43 without directly colliding with the bottom of the bridge. After that, the slide plate 22 can be inserted between the bridge and the sliding surface 41 at a certain angle, and the method of feeding the slide plate 22 is more scientific.

[0040] Example 4

[0041] Combined with Figure 1-5 , a crawler sliding device of this embodiment, compared with any one of embodiments 1-3, the slide plate 22 includes a polytetrafluoroethylene layer 221 in contact with the sliding base 4 and a rubber wear-resistant layer 222 in contact with the bridge.

[0042] The slide plate 22 made of polytetrafluoroethylene is not easy to drop debris during the friction process, and has good non-stickiness, high temperature resistance, corrosion resistance and insulation. At the same time, the friction coefficient of the polytetrafluoroethylene layer 221 is extremely small, only 1 / 5 of that of polyethylene, which is an important feature of the perfluorocarbon surface. It can reduce the friction resistance between the slide plate 22 and the sliding base 4 and reduce the workload of the transmission structure 3; the rubber wear-resistant layer 222 serves as the resistance matrix of the slide plate 22 in contact with the bridge, which further improves the stability of the slide plate 22 when driving the bridge to move. The rubber wear-resistant layer 222 with a relatively soft material is also easier to enter under the bridge in the initial stage, and will not cause hard collisions to cause damage.

[0043] In this embodiment, the rubber wear-resistant layer can be one of natural rubber, butyl rubber, and butadiene rubber.

[0044] In this embodiment, the thickness of the polytetrafluoroethylene layer 221 is 4 mm.

[0045] Example 5

[0046] Combined with Figure 1-5 In the crawler sliding device of this embodiment, compared with any one of embodiments 1-4, a supporting steel plate 223 is further provided in the slide plate 22.

[0047] The provision of the supporting steel plate 223 greatly improves the overall structural strength of the slide plate 22, and provides a stronger supporting capability when driving the bridge to move.

[0048] In this embodiment, the steel plate is embedded in the rubber wear-resistant layer 222 .

[0049] Example 6

[0050] Combined with Figure 1-5 In the crawler-type sliding device of this embodiment, compared with any one of embodiments 1-5, a polished stainless steel layer is provided on the contact surface between the sliding base 4 and the crawler 2.

[0051] The sliding base 4 is made of steel, and the sliding base 4 is welded from steel plates as a whole, which can meet the bearing capacity when transporting the bridge; a 4mm stainless steel layer is welded on the contact surface between the sliding base and the slide plate and polished, and the surface is machined and polished so that the surface roughness is less than 3.2. The friction of the track 2 sliding on the polished stainless steel layer is small, and the transmission structure 3 is more labor-saving when controlling the rotation of the track 2.

[0052] Example 7

[0053] Combined with Figure 1-5 , a crawler sliding device in this embodiment, compared with any one of embodiments 1-6, the transmission structure 3 includes at least two sprockets 3 meshing with the transmission chain 21 for transmission, and the sprockets 31 are fixed to the base 1 through the pin 32.

[0054] The sprocket 31 and the transmission chain 21 can work stably under low speed, heavy load and high temperature conditions and in dusty adverse environments, can ensure an accurate average transmission ratio, and transmit greater power. Compared with gear transmission, it can transmit motion and power when the centers of the two shafts are far apart.

[0055] Example 8

[0056] Combined with Figure 1-5 , a crawler sliding device of this embodiment, compared with any one of embodiments 1-7, a mounting seat 5 is provided under the sliding base 4, the mounting seat 5 is arranged in the base 1, a first gap 6 for installing a sprocket 31 is provided between the side wall of the mounting seat 5 and the base 1, and a second gap 7 for the transmission chain 21 to pass through is provided between the bottom of the mounting seat 5 and the base 1.

[0057] The sprocket 31 is installed in the first gap 6, and the two side walls of the sprocket 31 can be rotatably pressed against the wall of the base 1 and the mounting seat 5 respectively. When the transmission chain 21 rotates along the sprocket 31, the sprocket 31 will not tilt due to excessive load, ensuring that the rotation angle of the sprocket 31 remains fixed.

[0058] Example 9

[0059] Combined with Figure 1-5 In the crawler sliding device of this embodiment, compared with any one of embodiments 1-8, the transmission chain 21 is provided with a plurality of wing plates 211 that abut against the slide plate 22, and the wing plates 211 and the slide plate 22 are fixedly connected by fasteners 8.

[0060] After the wing plate 211 and the skateboard 22 are fixedly connected by the fastener 8, the transmission chain 21 and the skateboard 22 have a good connection strength. When the bridge is pressed tightly on the skateboard 22, the transmission chain 21 can stably drive the skateboard 22 and the bridge to move together, and the connection position between the transmission chain 21 and the skateboard 22 is not easy to break or fall off.

[0061] In this embodiment, the fastener 8 is a screw, and screw holes matching the screws are correspondingly provided on the wing plate 211 and the slide plate 22 . The screw holes on the slide plate 22 are countersunk holes, so that the screws will not protrude from the surface of the slide plate 22 .

[0062] In this embodiment, two wing plates 211 are symmetrically provided on the contact surface side between the transmission chain 21 and the slide plate 22 .

[0063] Example 10

[0064] Combined with Figure 1-5 In this embodiment, a crawler sliding device is provided, compared with any one of embodiments 1-9, in which the transmission chain 21 is provided with a fixed plate 212 on the other side corresponding to the wing plate 211, and a limiting wheel 9 is rotatably connected between the wing plate 211 and the fixed plate 212, and the limiting wheel 9 is rotatably pressed against the inner wall of the base 1.

[0065] The structure of the limiting wheel 9 is added on the basis of the transmission chain 21, which can effectively reduce the friction between the transmission chain 21 and the base 1 and reduce the running resistance of the transmission chain 21. At the same time, the limiting wheel 9 can be rotatably pressed against the inner wall of the base 1 to prevent the slide plate 22 from separating from the sliding base 4 during operation.

[0066] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A crawler type sliding device, characterized in that: It comprises a base, a crawler belt arranged on the base, and a transmission structure for driving the crawler belt to rotate, wherein the base is provided with a sliding base, and the inner side of the crawler belt can slide against the sliding base; The crawler includes a transmission chain and a plurality of slide plates arranged along the rotation direction of the transmission chain, wherein the transmission chain is provided with a group of slide plates on both sides of each slide plate; The sliding base is provided with a sliding surface that abuts against the inner side of the crawler, and the two sides of the sliding surface are respectively provided with a first guide surface and a second guide surface; The slide plate comprises a polytetrafluoroethylene layer in contact with the sliding base and a rubber wear-resistant layer in contact with the bridge; A supporting steel plate is also provided inside the slide plate; A polished stainless steel layer is provided on the contact surface between the sliding base and the crawler track; The transmission structure comprises at least two sprockets meshing with the transmission chain, and the sprockets are fixed to the base through pins; A mounting seat is provided below the sliding base, the mounting seat is arranged in the base, a first gap for mounting a sprocket is provided between the side wall of the mounting seat and the base, and a second gap for a transmission chain to pass through is provided between the bottom of the mounting seat and the base; The transmission chain is provided with a plurality of wing plates abutting against the slide plate, and the wing plates are fixedly connected to the slide plate by fasteners.

2. A crawler type sliding device according to claim 1, characterized in that: The transmission chain is provided with a fixed plate corresponding to the other side of the wing plate, and a limiting wheel is rotatably connected between the wing plate and the fixed plate, and the limiting wheel is rotatably pressed against the inner wall of the base.

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