Lifting platform for bridge

Abstract

The utility model discloses a lifting platform for a bridge, which comprises a vehicle body, the vehicle body comprises a vehicle body of a small excavator, a movable arm and a bucket rod cylinder, and a hydraulic winch is fixedly connected below the movable arm; the upper part of the connecting seat is hinged to the movable end of the bucket rod cylinder, the lower part of the connecting seat is hinged to the movable end of the movable arm, and the connecting seat is provided with an upper-end steel wire roller and a lifting ring; the sliding rail is in sliding fit with the connecting seat, a connecting plate is arranged at the bottom of the sliding rail, and a lower-end steel wire roller is arranged on the connecting plate; one end of the rotary platform is rotationally connected with the connecting plate, a hydraulic motor is arranged on the connecting plate, the hydraulic motor is connected with a hydraulic oil tank of the excavator through a pipeline, the hydraulic motor is provided with driving teeth, one end, connected with the connecting plate, of the rotary platform is provided with driven teeth, and the driving teeth are matched with the driving teeth to drive the rotary platform to rotate in the horizontal direction. According to the utility model, the technical problem of limited maintenance operation activity space in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of lifting platform technology, and in particular to a lifting platform for bridges. Background Technology

[0002] Bridges, as structures built to span natural or man-made obstacles, play a vital role in major cities, facilitating citizens' travel and preventing traffic congestion. Bridges require regular maintenance, including inspections of structural elements such as the outer flanges and webs.

[0003] In existing technologies, scaffolding is usually installed to carry out maintenance work on the outside of bridges. The installation and dismantling of scaffolding requires a lot of time, which is not only inefficient but also poses certain risks. Bridge inspection vehicles or aerial work platforms are also used to carry out maintenance work on the outside of bridges, but these are more expensive.

[0004] There are also improvements to existing technologies. Chinese invention patent CN108999082B discloses a platform for bridge maintenance. This patent solution has the following technical problems: the working space for maintenance personnel to carry out maintenance work within the fixed frame is limited, especially the area under the bridge cannot be inspected. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lifting platform for bridges to solve the technical problems of limited space for maintenance operations and inability to perform maintenance on the underside of the bridge.

[0006] To achieve the above objectives, this utility model provides a bridge lifting platform, comprising:

[0007] The vehicle body includes the body of a mini excavator, a boom, and a stick cylinder, with a hydraulic winch fixedly connected to the lower part of the boom;

[0008] A connecting seat, the upper part of which is hinged to the movable end of the boom cylinder, and the lower part of which is hinged to the movable end of the boom, the connecting seat being provided with an upper wire roller and a lifting ring;

[0009] The slide rail and the connecting seat slide in a vertical direction. The bottom of the slide rail is provided with a connecting plate, and the connecting plate is provided with a lower wire roller. The hydraulic winch, the upper wire roller, the lower wire roller and the lifting ring are connected in sequence by wire rope.

[0010] A slewing platform is provided, one end of which is rotatably connected to a connecting plate. A hydraulic motor is provided on the connecting plate. The hydraulic motor is connected to the hydraulic oil tank of the excavator through a pipeline. The hydraulic motor is provided with a drive tooth. The end of the slewing platform connected to the connecting plate is provided with a driven tooth. The drive tooth and the driven tooth cooperate to drive the slewing platform to rotate in the horizontal direction.

[0011] Furthermore, both the connecting seat and the slide rail adopt a frame mechanism. The slide rail passes through the connecting seat from the inside and slides with the connecting seat at opposite corners.

[0012] Furthermore, the connecting seat has a connecting ear on its side. The upper end of the connecting ear is hinged to the movable end of the stick cylinder, and the lower end of the connecting ear is hinged to the movable end of the boom. The connection between the connecting ear and the stick cylinder is far away from the connecting seat, and the connection between the connecting ear and the boom is close to the connecting seat.

[0013] Furthermore, the bridge lifting platform also includes a slewing bearing, which is disposed between the connecting plate and the slewing platform. The slewing bearing includes an inner ring and an outer ring arranged coaxially. The outer circumferential surface of the outer ring is provided with the driven tooth. The inner ring is connected to the connecting plate, and the outer ring is connected to the slewing platform.

[0014] Furthermore, the slide rail includes two parallel vertical rods, the cross-section of which is a rectangular ring structure. Several horizontal rods are spaced apart between the two vertical rods. Roller sets are respectively provided at opposite ends along the length direction above the connecting seat and at opposite ends along the length direction below the connecting seat. Each roller set includes a first roller, and four first rollers respectively roll in cooperation with the side of the vertical rod away from the horizontal rod.

[0015] Furthermore, the roller assembly also includes two second rollers, which are located on opposite sides of the first roller in the axial direction. The central axis of the first roller is perpendicular to the central axis of the second roller, and the two second rollers of the roller assembly respectively cooperate with the opposite sides of the corresponding vertical rod.

[0016] Furthermore, a first preset gap is provided between the connection between the outer ring and the rotary platform and the inner ring, and a second preset gap is provided between the connection between the inner ring and the connecting plate and the rotary platform. The outer ring is connected to the rotary platform by a number of bolts, and the inner ring is connected to the connecting plate by a number of bolts.

[0017] Furthermore, the hydraulic winch, the upper wire roller, the lower wire roller, and the lifting ring are all located on the same side of the plurality of transverse bars.

[0018] Working principle: When using this utility model, maintenance personnel enter the slewing platform on the bridge deck, and the excavator driver operates the hydraulic winch. Under the action of the hydraulic winch, wire rope, upper wire roller, lower wire roller and lifting ring, the slewing platform rises, the boom is operated and the vehicle body is rotated to allow the slewing platform to pass over the bridge guardrail.

[0019] When it is necessary to inspect the side of the bridge, the operator operates the hydraulic winch to lower the slewing platform to the designated position on the side of the bridge. The operator then operates the hydraulic motor, and the slewing platform rotates under the action of the drive teeth and driven teeth until the extension direction of the slewing platform is roughly in line with the extension direction of the bridge.

[0020] When maintenance is required under the bridge, the operator uses the hydraulic winch to lower the slewing platform to the side under the bridge. The operator then operates the hydraulic motor, which rotates the slewing platform under the action of the drive and driven teeth until the moving end of the slewing platform is directly under the bridge.

[0021] The beneficial effects of this utility model are:

[0022] It does not require frequent disassembly and assembly of scaffolding; the vehicle body can be moved when the inspection location changes, which is highly efficient and safe.

[0023] This utility model can be obtained by modifying a small excavator, which is less expensive than using a bridge inspection vehicle or an aerial work platform.

[0024] By operating the hydraulic winch, the slewing platform can be moved to the side of the bridge under the action of the hydraulic winch, wire rope, upper wire roller, lower wire roller and lifting ring. It is operated by hydraulic motor. The extension direction of the slewing platform can be roughly consistent with the extension direction of the bridge. Maintenance personnel can walk on the slewing platform to carry out maintenance work, and the working space is large.

[0025] By operating the hydraulic winch and hydraulic motor, the movable end of the slewing platform can be moved directly under the bridge, expanding the maintenance range. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1This is an overall schematic diagram of a bridge lifting platform according to the present invention;

[0028] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0029] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0030] Figure 4 This is an assembly diagram of the connecting plate, slewing bearing and hydraulic motor in a bridge lifting platform according to this utility model.

[0031] Figure 5 for Figure 4 A magnified view of a section at point C;

[0032] Figure 6 This is a schematic diagram of the slide rail structure in a bridge lifting platform according to the present invention;

[0033] Figure 7 This is a front view of the rotating platform in a bridge lifting platform according to this utility model;

[0034] Figure 8 This is a top view of the rotating platform in a bridge lifting platform according to this utility model.

[0035] In the diagram, 1. Vehicle body; 11. Vehicle body; 12. Boom; 13. Hydraulic winch; 14. Stick cylinder; 2. Connecting seat; 21. Connecting lug; 22. Upper wire roller; 23. Roller assembly; 231. Second roller; 232. First roller; 233. Angle steel; 3. Slide rail; 31. Vertical rod; 32. Horizontal rod; 33. Connecting plate; 34. Lower wire roller; 4. Slewing platform; 41. Slewing seat; 5. Slewing bearing; 51. Inner ring; 52. Outer ring; 521. Driven gear; 6. Hydraulic motor; 61. Drive gear. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0041] This utility model provides a bridge lifting platform, comprising: a vehicle body 1, which includes a mini excavator body 11, a boom 12, and a stick cylinder 14, with a hydraulic winch 13 fixedly connected to the lower part of the boom 12; a connecting seat 2, the upper part of which is hinged to the movable end of the stick cylinder 14, and the lower part of which is hinged to the movable end of the boom 12; the connecting seat 2 is provided with an upper wire roller 22 and a lifting ring (not shown); and a slide rail 3, which slides vertically with the connecting seat 2, with a connecting plate 33 at the bottom of the slide rail 3. Plate 33 is equipped with a lower wire roller 34. The hydraulic winch 13, upper wire roller 22, lower wire roller 34 and lifting ring are connected in sequence by wire ropes. A slewing platform 4 is rotatably connected to the connecting plate 33 at one end. The connecting plate 33 is equipped with a hydraulic motor 6. The hydraulic motor 6 is connected to the hydraulic oil tank of the excavator through a pipeline. The hydraulic motor 6 is equipped with a drive gear 61. The end of the slewing platform 4 connected to the connecting plate 33 is equipped with a driven gear 521. The drive gear 61 and the driven gear 521 cooperate to drive the slewing platform 4 to rotate in the horizontal direction.

[0042] When this utility model is in use, maintenance personnel enter the slewing platform 4 on the bridge deck, and the excavator driver operates the hydraulic winch 13. Under the action of the hydraulic winch 13, steel wire rope, upper steel wire roller 22, lower steel wire roller 34 and lifting ring, the slewing platform 4 rises, the boom 12 is operated and the body 11 is rotated to allow the slewing platform 4 to pass over the bridge railing.

[0043] When it is necessary to inspect the side of the bridge, the operator operates the hydraulic winch 13 to lower the slewing platform 4 to the designated position on the side of the bridge. The operator operates the hydraulic motor 6, and the slewing platform 4 rotates under the action of the drive gear 61 and the driven gear 521 until the extension direction of the slewing platform 4 is roughly consistent with the extension direction of the bridge.

[0044] When maintenance is required under the bridge, the operator operates the hydraulic winch 13 to lower the slewing platform 4 to the side under the bridge. The operator operates the hydraulic motor 6, and the slewing platform 4 rotates under the action of the drive gear 61 and the driven gear 521 until the moving end of the slewing platform 4 rotates to directly under the bridge.

[0045] The technical solution proposed in this application eliminates the need for frequent disassembly and assembly of scaffolding. When the inspection location changes, the vehicle body 1 can be moved, resulting in high efficiency and a high safety factor. This utility model can be obtained by modifying a small excavator, which is less expensive than using a bridge inspection vehicle or aerial work platform. By operating the hydraulic winch 13, the rotating platform 4 can be moved to the side of the bridge under the action of the hydraulic winch 13, wire rope, upper wire roller 22, lower wire roller 34, and lifting ring. Operated by the hydraulic motor 6, the extension direction of the rotating platform 4 can be largely consistent with the extension direction of the bridge, allowing maintenance personnel to walk on the rotating platform 4 for inspection work, providing a large working space. By operating the hydraulic winch 13 and hydraulic motor 6, the movable end of the rotating platform 4 can be moved directly under the bridge, expanding the inspection range.

[0046] It should be noted that the hydraulic winch 13 and the hydraulic motor 6 are electrically connected to the control panel of the excavator cab. As for how to achieve the electrical connection and how to control the hydraulic winch 13 and the hydraulic motor 6 through the control panel, these are very mature technologies and will not be elaborated here.

[0047] Both the connecting seat 2 and the slide rail 3 adopt a frame mechanism. The slide rail 3 passes through the inside of the connecting seat 2 and slides with the connecting seat 2 at the opposite corners.

[0048] Both the connecting seat 2 and the slide rail 3 adopt a frame structure, which allows the connecting seat 2 and the slide rail 3 to have a small weight. The slide rail 3 passes through the inside of the connecting seat 2. The two corners of the slide rail 3 slide with the connecting seat 2 respectively, so that when the slide rail 3 and the connecting seat 2 slide with each other, the connecting seat 2 can better limit the slide rail 3.

[0049] Specifically, the slide rail 3 includes two parallel vertical rods 31, each with a rectangular ring-shaped cross-section. Several transverse rods 32 are spaced between the two vertical rods 31. Roller sets 23 are provided at opposite ends along the length of the connecting seat 2 above it and at opposite ends along the length of the connecting seat 2 below it. Each roller set 23 includes first rollers 232, with four first rollers 232 respectively engaging with the sides of the vertical rods 31 away from the transverse rods 32. The roller set 23 also includes two second rollers. 231, two second rollers 231 are located on opposite sides of the first roller 232 in the axial direction. The central axis of the first roller 232 is perpendicular to the central axis of the second roller 231. The two second rollers 231 of the roller assembly 23 are respectively engaged with the opposite sides of the corresponding vertical rod 31. The first roller 232 and the second roller 231 are connected by an angle steel 233. The first roller 232 is rotatably connected to one side plate of the angle steel 233, and the second roller 231 is rotatably connected to the other side plate of the angle steel 233.

[0050] The two first rollers 232 located on opposite sides of the slide rail 3 can limit the slide rail 3 along the length direction of the transverse rod 32, and the two second rollers 231 of the roller group 23 can limit the slide rail 3 along the width direction of the transverse rod 32. The arrangement of several roller groups 23 can effectively limit the movement of the slide rail 3. There is rolling friction between the first roller 232 and the vertical rod 31, and between the second roller 231 and the vertical rod 31, so the resistance when the slide rail 3 rises and falls is small.

[0051] Regarding how the connecting seat 2 is connected to the boom cylinder 14 and the boom 12, as a preferred embodiment, a further improvement of this utility model is that the connecting seat 2 is provided with a connecting ear 21 on its side. The upper end of the connecting ear 21 is hinged to the movable end of the boom cylinder 14, and the lower end of the connecting ear 21 is hinged to the movable end of the boom 12. The connection point between the connecting ear 21 and the boom cylinder 14 is far away from the connecting seat 2, and the connection point between the connecting ear 21 and the boom 12 is close to the connecting seat 2.

[0052] It should be noted that the boom 12 and stick cylinder 14 are common structures in excavators, and their specific structures and working principles will not be elaborated here. The advantage of connecting the boom 12 and stick cylinder 14 to the connecting seat 2 is that the angle of the connecting seat 2 can be adjusted by the stick cylinder 14. Under the action of the connecting seat 2, the angles of the slide rail 3 and the slewing platform 4 can also be adjusted along with the connecting seat 2.

[0053] When there are many workers on the slewing platform 4, or when the slewing platform 4 needs to be equipped with testing devices, resulting in a large load on the slewing platform 4, the extension and retraction of the boom cylinder 14 can be used to prevent the moving end of the slewing platform 4 from tilting excessively downward.

[0054] To ensure the strength of the rotational connection between the slewing platform 4 and the connecting plate 33, the bridge lifting platform also includes a slewing bearing 5. The slewing bearing 5 is located between the connecting plate 33 and the slewing platform 4. The slewing bearing 5 includes an inner ring 51 and an outer ring 52 arranged coaxially. The outer circumferential surface of the outer ring 52 is provided with a driven tooth 521. The inner ring 51 is connected to the connecting plate 33, and the outer ring 52 is connected to the slewing platform 4.

[0055] Specifically, a first preset gap is provided between the connection between the outer ring 52 and the rotary platform 4 and the inner ring 51, and a second preset gap is provided between the connection between the inner ring 51 and the connecting plate 33 and the rotary platform 4. The outer ring 52 is connected to the rotary platform 4 by several bolts, and the inner ring 51 is connected to the connecting plate 33 by several bolts. The rotary platform 4 is a frame structure, and a rotary seat 41 is fixedly connected to one end of the rotary platform 4 in the length direction. The rotary seat 41 is connected to the outer ring 52 by several bolts.

[0056] The slewing bearing 5 (also known as a turntable bearing) is a large bearing capable of withstanding comprehensive loads, featuring easy installation and maintenance, and high load capacity. Practical experience has shown that the slewing platform 4 of this invention can support at least five adults.

[0057] In order for the hydraulic winch 13, the upper wire roller 22, the lower wire roller 34 and the lifting ring to work normally, the hydraulic winch 13, the upper wire roller 22, the lower wire roller 34 and the lifting ring are all located on the same side of several horizontal bars 32.

[0058] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A bridge lifting platform, characterized in that, include: The vehicle body includes the body of a mini excavator, a boom, and a stick cylinder, with a hydraulic winch fixedly connected to the lower part of the boom; A connecting seat, the upper part of which is hinged to the movable end of the boom cylinder, and the lower part of which is hinged to the movable end of the boom, the connecting seat being provided with an upper wire roller and a lifting ring; The slide rail and the connecting seat slide in a vertical direction. The bottom of the slide rail is provided with a connecting plate, and the connecting plate is provided with a lower wire roller. The hydraulic winch, the upper wire roller, the lower wire roller and the lifting ring are connected in sequence by wire rope. A slewing platform is provided, one end of which is rotatably connected to a connecting plate. A hydraulic motor is provided on the connecting plate. The hydraulic motor is connected to the hydraulic oil tank of the excavator through a pipeline. The hydraulic motor is provided with a drive tooth. The end of the slewing platform connected to the connecting plate is provided with a driven tooth. The drive tooth and the driven tooth cooperate to drive the slewing platform to rotate in the horizontal direction.

2. The bridge lifting platform as described in claim 1, characterized in that, Both the connecting seat and the slide rail adopt a frame mechanism. The slide rail passes through the connecting seat from the inside and the connecting seat is connected to the connecting seat at opposite corners.

3. The bridge lifting platform as described in claim 1, characterized in that, The connecting seat has a connecting lug on its side. The upper end of the connecting lug is hinged to the movable end of the stick cylinder, and the lower end of the connecting lug is hinged to the movable end of the boom. The connection between the connecting lug and the stick cylinder is far away from the connecting seat, and the connection between the connecting lug and the boom is close to the connecting seat.

4. The bridge lifting platform as described in claim 1, characterized in that, The bridge lifting platform also includes a slewing bearing, which is disposed between the connecting plate and the slewing platform. The slewing bearing includes an inner ring and an outer ring arranged coaxially. The outer circumferential surface of the outer ring is provided with the driven tooth. The inner ring is connected to the connecting plate, and the outer ring is connected to the slewing platform.

5. The bridge lifting platform as described in claim 2, characterized in that, The slide rail includes two parallel vertical rods, each with a rectangular ring-shaped cross-section. Several horizontal rods are spaced apart between the two vertical rods. Roller sets are provided at opposite ends along the length of the connecting seat above and below the connecting seat. Each roller set includes a first roller, and four first rollers respectively roll in contact with the sides of the vertical rods away from the horizontal rods.

6. The bridge lifting platform as described in claim 5, characterized in that, The roller assembly further includes two second rollers, which are located on opposite sides of the first roller in the axial direction. The central axis of the first roller is perpendicular to the central axis of the second roller, and the two second rollers of the roller assembly respectively cooperate with the opposite sides of the vertical rod.

7. The bridge lifting platform as described in claim 4, characterized in that, A first preset gap is provided between the connection between the outer ring and the rotary platform and the inner ring, and a second preset gap is provided between the connection between the inner ring and the connecting plate and the rotary platform. The outer ring is connected to the rotary platform by a number of bolts, and the inner ring is connected to the connecting plate by a number of bolts.

8. The bridge lifting platform as described in claim 5, characterized in that, The hydraulic winch, the upper wire roller, the lower wire roller, and the lifting ring are all located on the same side of the several transverse bars.

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