A double-rotation frame structure of a bridge inspection vehicle

Abstract

The present application relates to bridge inspection equipment technical field, aims at solving the problem of existing three rotary structure, large space occupation, narrow traffic space, personnel traffic is seriously limited, provides a kind of double rotary frame structure of bridge inspection car, including intermediate frame, the upper end of intermediate frame is rotatably connected with upper structure, the lower end of intermediate frame is rotatably connected with lower structure, and rotary detection device is arranged between upper structure and lower structure;Intermediate frame is internally mounted with intermediate ladder, and intermediate ladder includes straight ladder and gradually changing handrail rod, straight ladder is arranged inside lower structure, and the upper end of straight ladder is symmetrically connected with gradually changing handrail rod, gradually changing handrail rod extends to the inside of intermediate frame upwards, the width between two gradually changing handrail rods gradually increases, and gradually changing handrail rod is inclined to outside simultaneously;The structure of the present application is compact, improves personnel traffic comfort while ensuring that overall space occupation is small, and is convenient to operate, improves construction, installation operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of bridge inspection equipment technology, and more specifically, to a double-rotating frame structure for a bridge inspection vehicle. Background Technology

[0002] Because the bridge cross-section involves two-layer areas at both ends, a single inspection vehicle cannot rely on the telescopic truss method for maintenance and operation; the existing three-turn structure basically meets the above functions, but increases the weight of the vehicle body and the assembly and maintenance work of the equipment itself.

[0003] The existing three-turn structure occupies a large space and has a narrow passageway, which severely restricts personnel passage. Personnel passage is also restricted by the fact that the electrical rotation monitoring device for asynchronous operation of the left and right rails of the equipment occupies a large passageway. Summary of the Invention

[0004] The present invention aims to provide a double-slewing frame structure for a bridge inspection vehicle to solve the problems of existing three-slewing structures, which occupy a large space, have narrow passage space, and severely restrict personnel passage.

[0005] This invention is achieved using the following technical solution:

[0006] A double-rotating frame structure for a bridge inspection vehicle includes a middle frame, the upper end of which is rotatably connected to an upper structure, the lower end of which is rotatably connected to a lower structure, and a rotation detection device is provided between the upper structure and the lower structure.

[0007] An intermediate ladder is installed inside the intermediate frame. The intermediate ladder includes a straight ladder and a tapered handrail. The straight ladder is arranged inside the lower structure. The tapered handrail is symmetrically connected to the upper end of the straight ladder. The tapered handrail extends upward into the interior of the intermediate frame. The width between the two tapered handrails gradually increases, and the tapered handrails are inclined outward.

[0008] This invention employs a more compact double-rotation structure, occupying less space and offering convenient operation, thus improving construction and installation efficiency. It makes full use of space, not only arranging a rotation detection device within the narrow space of the middle frame and lower structure, but also installing a central ladder. The straight ladder effectively saves space for personnel passage and adapts to the compactness of the structure. The gradually widening handrails gradually widen to both sides and tilt outwards, guiding personnel out of the confined space. This structure not only meets passage needs but also effectively alleviates the feeling of oppression when passing through narrow spaces, improving personnel comfort while maintaining a small overall space footprint.

[0009] As a preferred technical solution:

[0010] The upper structure, the middle frame, and the lower structure are coaxial.

[0011] As a preferred technical solution:

[0012] The gradient handrail and the straight ladder are fixedly connected to the intermediate frame.

[0013] As a preferred technical solution:

[0014] The upper end of the gradient handrail is connected to a handrail.

[0015] As a preferred technical solution:

[0016] The intermediate frame is rotatably connected to the upper structure via a first slewing bearing, and the intermediate frame is rotatably connected to the lower structure via a second slewing bearing. The intermediate frame is able to rotate freely relative to the upper structure and the lower structure.

[0017] As a preferred technical solution:

[0018] The first slewing bearing is a toothed slewing bearing, and the second slewing bearing is a toothless slewing bearing.

[0019] As a preferred technical solution:

[0020] The intermediate frame is equipped with multiple rotational displacement sensors in its circumferential direction, and the rotational displacement sensors are connected to the PLC module.

[0021] As a preferred technical solution:

[0022] A rotary drive is installed on the upper structure, and the rotary drive is connected to the intermediate frame. The rotary drive is used to drive the intermediate frame to rotate axially.

[0023] As a preferred technical solution:

[0024] The upper structure is provided with a positioning device, which is used to fix the upper structure relative to the intermediate frame.

[0025] As a preferred technical solution:

[0026] The positioning device includes an electric strut, a pin, and a guide sleeve. The guide sleeve is fixed to the upper structure, the electric strut is connected to one end of the pin, and the other end of the pin is inserted into the guide sleeve.

[0027] The intermediate frame is provided with a positioning sleeve, which corresponds to the position of the guide sleeve, and the pin can be inserted into the positioning sleeve.

[0028] This locks the intermediate frame to the upper structure at its permanent location.

[0029] As a preferred technical solution:

[0030] The electric support rod is connected to the PLC module, which can control it to extend or retract the pin.

[0031] As a preferred technical solution:

[0032] The rotation detection device includes a rotation synchronization bracket and an angular displacement sensor mounted on the upper structure. One end of the rotation synchronization bracket is connected to the lower structure, and the other end of the rotation synchronization bracket and the angular displacement sensor can be adjusted in three directions: longitudinal, transverse, and vertical.

[0033] As a preferred technical solution:

[0034] One end of the rotating synchronous support is connected to the lower structure via a connecting seat. The other end of the rotating synchronous support extends towards the center of rotation and is in close contact with the inner circumferential surfaces of the first and second slewing supports. The other end of the rotating synchronous support is connected to an inclined cantilever. A vertical groove is provided on the inclined cantilever. The inclined cantilever is connected to an adjusting seat one via a vertical connecting member. The vertical connecting member can slide vertically within the vertical groove. An adjusting seat one is provided with a transverse groove. The adjusting seat one is connected to an adjusting seat two. The adjusting seat two includes a horizontal plate two and a horizontal plate three located below it. A longitudinal groove is provided on the horizontal plate three. The adjusting seat one is connected to the horizontal plate two and the horizontal plate three via a longitudinal and transverse connecting member. The longitudinal and transverse connecting member can slide laterally within the transverse groove and longitudinally within the longitudinal groove. The horizontal plate three is connected to the angular displacement sensor via an arc-shaped connecting rod.

[0035] As a preferred technical solution:

[0036] The adjusting seat includes a vertical plate and a horizontal plate connected to one end thereto. A through hole is provided on the vertical plate, and the vertical connecting member is installed between the through hole and the vertical groove.

[0037] As a preferred technical solution:

[0038] The horizontal plate has a through hole, and the transverse and longitudinal connecting parts are installed in the transverse groove, the longitudinal groove, and the through hole.

[0039] As a preferred technical solution:

[0040] The lower structure is equipped with a sliding device.

[0041] The structure connected to the lower structure can have an allowable amount of sliding relative to the lower structure along the sliding device.

[0042] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0043] 1. Compared with the three-rotation structure, the double-rotation structure adopted in this invention is more compact, occupies less space, is easy to operate, and improves the efficiency of construction and installation operations. It maximizes the use of space from the perspective of ergonomics.

[0044] 2. This invention addresses the issue of using a rotation detection device to ensure synchronization between the upper and lower structures in a confined space, while also allowing the middle structure to rotate freely.

[0045] 3. The present invention features a gradually widening ladder handrail in a narrow space. The straight ladder section uses a small-spaced handrail, while the handrails on both sides gradually widen as people walk horizontally. This facilitates the transition of people from standing to squatting through the ladder structure, effectively alleviating the feeling of oppression when people pass through narrow spaces (narrow ladders).

[0046] 4. When the intermediate structure of the present invention stops rotating, the use of a pin can effectively limit the risk of relative rotation. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the double-rotating frame structure of the bridge inspection vehicle described in this invention.

[0048] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0049] Figure 3 This is a schematic diagram of the three-way adjustment device described in this invention.

[0050] Figure 4 This is a schematic diagram of the passage space of the double-rotating frame structure of the bridge inspection vehicle described in this invention.

[0051] Figure 5 for Figure 2 A cross-sectional view along the BB direction.

[0052] Icons: 1 Rotary drive, 2 Toothed slewing bearing, 3 Intermediate frame, 4 Intermediate ladder, 5 Lower structure, 6 Upper structure, 7 Positioning device, 8 Connecting pin, 9 Rotary synchronous bracket, 10 Toothless slewing bearing, 11 Inclined cantilever, 12 Adjusting seat one, 13 Adjusting seat two, 14 Vertical connector, 15 Longitudinal and transverse connector, 16 Arc-shaped connecting rod, 3-1 Transverse channel, 3-2 Annular hole, 4-1 Handrail, 4-2 Gradient handrail bar, 4-3 Straight ladder, 5-1 Sliding device, 7-1 Electric support rod, 7-2 Pin, 7-3 Guide sleeve, 7-4 Positioning sleeve, 9-1 Connecting seat, 9-2 Angular displacement sensor, 9-3 Longitudinal groove, 9-4 Transverse groove, 9-5 Vertical groove, 12-1 Vertical plate, 12-2 Horizontal plate one, 12-3 Through hole one, 13-1 Horizontal plate two, 13-2 Horizontal plate three, 13-3 Through hole two. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] Example 1

[0055] like Figure 1 and Figure 2 As shown, this embodiment proposes a double-rotating frame structure for a bridge inspection vehicle, including a middle frame 3. The middle frame 3 is bolted with two rotating supports: a toothed rotating support 2 and a toothless rotating support 10. The middle frame 3 is rotatably connected to the upper structure 6 via the toothed rotating support 2, and rotatably connected to the lower structure 5 via the toothless rotating support 10. The middle frame 3 can rotate freely relative to the upper structure 6 and the lower structure 5. The upper structure 6, the middle frame 3, and the lower structure 5 are coaxial.

[0056] Rotational displacement sensors are installed at multiple points on the circumference of the intermediate frame 3, with each sensor located at a different angle on the circumference of the intermediate frame 3. The relative rotation angle between the intermediate frame 3 and the upper structure 6 can be monitored by sending feedback signals to the PLC module through the rotational displacement sensors at various points on the circumference of the intermediate frame 3.

[0057] A rotary drive 1 is fixedly installed on the circumference of the upper structure 6. The rotary drive 1 belongs to the planetary gear of the toothed slewing bearing 2, but is not limited to this structure.

[0058] The intermediate frame 3 is connected to the rotary drive 1, which drives the intermediate frame 3 to rotate axially. When the intermediate frame 3 rotates around the upper structure 6 to a corresponding position, the rotational displacement sensor at that position feeds back a signal to the PLC module, and the PLC module controls the rotary drive 1 to perform corresponding forward and reverse actions.

[0059] The upper structure 6 is provided with a positioning device 7, which is used to fix the upper structure 6 relative to the intermediate frame 3.

[0060] like Figure 5 As shown, the positioning device 7 includes an electric support rod 7-1, a pin 7-2, and a guide sleeve 7-3, all three located on the same axis. The electric support rod 7-1 is connected to one end of the pin 7-2, and the other end of the pin 7-2 is inserted into the guide sleeve 7-3. The guide sleeve 7-3 is fixed to the circumference of the upper structure 6, and the positioning sleeve 7-4 is fixed to the circumference of the intermediate frame 3. The positioning sleeve 7-4 corresponds to the guide sleeve 7-3, and is located directly below the guide sleeve 7-3. The positioning sleeve 7-4 is an annular sleeve made of elastic material.

[0061] When the intermediate frame 3 rotates around the upper structure 6 to the stationary position, the rotation displacement sensor at that position sends a feedback signal to the PLC module. At this time, the electric support rod 7-1 can receive the command from the PLC module to push the pin 7-2 into the positioning sleeve 7-4 and send a feedback signal to the PLC module, interlocking with the action command of the rotation drive 1. When the rotation drive 1 is activated, the electric support rod 7-1 needs to be unlocked to retract the pin 7-2 and perform the corresponding rotation action.

[0062] The upper structure 6 and the lower structure 5 are fixed relative to each other. In this embodiment, the lower structure 5 is allowed to rotate slightly relative to the upper structure 6. An angular displacement sensor 9-2 is fixed at the center of the upper structure 6.

[0063] The lower structure 5 has a rotating synchronous support 9 on its inner circumference. One end of the rotating synchronous support 9 is connected to the connecting seat 9-1, which is bolted to the lower part of the lower structure 5. The other end of the rotating synchronous support 9 extends toward the center of rotation and is in close contact with the inner circumferential surface of the toothless slewing bearing 10 and the toothed slewing bearing 2. This end of the rotating synchronous support 9 can be adjusted in three directions with the angular displacement sensor 9-2. The three directions are longitudinal, transverse and vertical, which correspond to the X, Y and Z directions, respectively.

[0064] Specifically, this is how it is implemented: Figure 3As shown, one end of the rotating synchronous support 9 is connected to an inclined cantilever 11. The inclined cantilever 11 has a vertical groove 9-5. The inclined cantilever 11 is connected to an adjusting seat 12. The adjusting seat 12 includes a vertical plate 12-1 and a horizontal plate 12-2 connected to one end thereto. The vertical plate 12-1 has a through hole 12-3. A vertical connector 14 is installed between the through hole 12-3 and the vertical groove 9-5. The vertical connector 14 can slide vertically within the vertical groove 9-5. Therefore, the adjusting seat 12 can move vertically relative to the rotating synchronous support 9 and the inclined cantilever 11.

[0065] The first adjusting seat 12 is connected to the second adjusting seat 13. The first horizontal plate 12-2 has a transverse groove 9-4. The second adjusting seat 13 includes a second horizontal plate 13-1 and a third horizontal plate 13-2 located below it. The second horizontal plate 13-1 has a through hole 13-3. The third horizontal plate 13-2 has a longitudinal groove 9-3. The through hole 13-3 is opposite to the longitudinal groove 9-3. A longitudinal and transverse connecting member 15 is installed in the transverse groove 9-4, the longitudinal groove 9-3 and the through hole 13-3. The longitudinal and transverse connecting member 15 can slide laterally in the transverse groove 9-4 and longitudinally in the longitudinal groove 9-3. Therefore, after the longitudinal and transverse connecting member 15 is connected to the second horizontal plate 13-1, it can move laterally relative to the first horizontal plate 12-2 and longitudinally relative to the third horizontal plate 13-2. The horizontal plate 13-2 is connected to the angular displacement sensor 9-2 via the arc-shaped connecting rod 16, thereby enabling the transmission of the slight torsional angle between the upper structure 6 and the lower structure 5 to the angular displacement sensor 9-2 through the rotating synchronous bracket 9. The angular displacement sensor 9-2 then feeds back the angular displacement data to the PLC module.

[0066] Therefore, the relative rotation angle between the lower structure 5 and the upper structure 6 can be monitored by the rotation synchronization bracket 9, which transmits the torque to the angular displacement sensor 9-2 on the upper structure 6 and feeds back the signal to the PLC module.

[0067] To adapt to the compactness of the space and save vertical passage space, this invention employs an inclined extension rod type rotating synchronous support 9 and an inclined cantilever 11. The rotating synchronous support 9 extends close to the inner circumference of the vertical passage area of ​​the intermediate frame 3, avoiding the middle area of ​​the vertical passage, and then transmits the torque to the rotation center monitoring point (angular displacement sensor 9-2) through the inclined cantilever 11. This invention achieves three-way adjustment through the longitudinal groove 9-3, transverse groove 9-4, and vertical groove 9-5 in the three-way adjustment device, which can adapt to the coaxiality correction with the angular displacement sensor 9-2 during product manufacturing and installation. The three-way adjustment device includes the inclined cantilever 11, the first adjustment seat 12, and the second adjustment seat 13. The purpose of setting up the three-way adjustment device in this invention is to effectively correct manufacturing deviations when the manufacturing precision of the slender rod that transmits torque is difficult to guarantee, thereby ensuring the assembly precision of the torque output shaft and the torque signal input shaft.

[0068] like Figure 4 As shown, the toothless slewing bearing 10 and the lower structure 5 are provided with a hollow annular hole 3-2 in the middle, which allows personnel to pass through easily.

[0069] A middle ladder 4 is fixed on the middle frame 3. The middle ladder 4 is located inside the middle frame 3. The middle ladder 4 is used to connect the transverse channel 3-1 on the side of the middle frame 3 and the annular hole 3-2 below it.

[0070] The intermediate ladder 4 includes a straight ladder 4-3, a tapered handrail 4-2, and a handrail 4-1. The upper end of the straight ladder 4-3 is connected to the tapered handrail 4-2, and the upper end of the tapered handrail 4-2 is connected to the handrail 4-1. The width between the two tapered handrails 4-2 gradually increases from the straight ladder 4-3 to the handrail 4-1. Simultaneously, the tapered handrails 4-2 are angled outwards, which helps guide pedestrians out of the confined space, specifically towards the transverse passage 3-1.

[0071] The annular hole 3-2 is located in a narrow vertical space, serving as a vertical passage. The placement of a straight ladder 4-3 here effectively saves space for personnel passage and accommodates the compactness of the structure. To enter the transverse passage 3-1, personnel must traverse the ladder. The gradient handrail 4-2 here effectively alleviates the feeling of pressure when moving up and down the narrow ladder, accommodating transverse movement. Due to the limited clearance height of the annular hole 3-2, a handrail 4-1 is installed above the gradient handrail 4-2 to facilitate personnel movement up and down the ladder. This makes it easier for personnel to enter and exit the transverse passage 3-1 and the upper and lower annular holes 3-2, allowing them to transition from an upright to a semi-squatting ladder structure while effectively saving space.

[0072] The lower structure 5 is provided with a sliding device 5-1, which allows the structure connected to the lower structure 5 to have an allowable amount of sliding along the sliding device 5-1.

[0073] The intermediate frame 3 is provided with a connecting pin 8, which is used to connect to an external platform. The failure risk of the connection through the connecting pin 8 is low because the failure risk of the pin due to shear is much lower than the failure risk of the bolt connection (e.g., loosening, stripping).

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A double-rotating frame structure for a bridge inspection vehicle, characterized in that: It includes a middle frame, the upper end of which is rotatably connected to the upper structure, the lower end of which is rotatably connected to the lower structure, and a rotation detection device is provided between the upper structure and the lower structure. The middle frame is equipped with a middle ladder, which includes a straight ladder and a tapered handrail. The straight ladder is arranged inside the lower structure. The upper end of the straight ladder is symmetrically connected to the tapered handrail. The tapered handrail extends upward into the interior of the middle frame. The width between the two tapered handrails gradually increases, and the tapered handrails are inclined outward. The intermediate frame is rotatably connected to the upper structure via a first slewing bearing, and the intermediate frame is rotatably connected to the lower structure via a second slewing bearing. The intermediate frame is able to rotate freely relative to the upper structure and the lower structure. The rotation detection device includes a rotation synchronization bracket and an angular displacement sensor mounted on the upper structure. One end of the rotation synchronization bracket is connected to the lower structure, and the other end of the rotation synchronization bracket and the angular displacement sensor can be adjusted in three directions: longitudinal, transverse, and vertical. One end of the rotating synchronous support is connected to the lower structure via a connecting seat. The other end of the rotating synchronous support extends towards the center of rotation and is in close contact with the inner circumferential surfaces of the first and second slewing supports. The other end of the rotating synchronous support is connected to an inclined cantilever. The inclined cantilever has a vertical groove. The inclined cantilever is connected to an adjusting seat one via a vertical connector. The vertical connector can slide vertically within the vertical groove. The adjusting seat one has a horizontal groove. The adjusting seat one is connected to an adjusting seat two. The adjusting seat two includes a horizontal plate two and a horizontal plate three located below it. The horizontal plate three has a longitudinal groove. Adjustment seat one is connected to horizontal plate two and horizontal plate three via longitudinal and transverse connecting parts. The longitudinal and transverse connecting parts can slide laterally in the transverse groove and longitudinally in the longitudinal groove. Horizontal plate three is connected to the angular displacement sensor via an arc-shaped connecting rod. The rotation synchronization bracket avoids the middle area of ​​the vertical channel of the intermediate frame and then transmits the torque to the rotation center monitoring point via the inclined cantilever. The rotation center monitoring point is the location of the angular displacement sensor. The three-way adjustment device includes the inclined cantilever, adjustment seat one, and adjustment seat two. The three-way adjustment device can ensure the assembly accuracy of the torque output shaft and the torque signal input shaft.

2. The double-rotating frame structure of the bridge inspection vehicle according to claim 1, characterized in that: The upper end of the gradient handrail is connected to a handrail.

3. The double-rotating frame structure of the bridge inspection vehicle according to claim 1, characterized in that: The intermediate frame is equipped with multiple rotational displacement sensors in its circumferential direction, and the rotational displacement sensors are connected to the PLC module.

4. The double-rotating frame structure of the bridge inspection vehicle according to claim 1, characterized in that: A rotary drive is installed on the upper structure, and the rotary drive is connected to the intermediate frame. The rotary drive is used to drive the intermediate frame to rotate axially.

5. The double-rotating frame structure of the bridge inspection vehicle according to claim 1, characterized in that: The upper structure is provided with a positioning device, which is used to fix the upper structure relative to the intermediate frame.

6. The double-rotating frame structure of the bridge inspection vehicle according to claim 5, characterized in that: The positioning device includes an electric strut, a pin, and a guide sleeve. The guide sleeve is fixed to the upper structure, the electric strut is connected to one end of the pin, and the other end of the pin is inserted into the guide sleeve. The intermediate frame is provided with a positioning sleeve, which corresponds to the position of the guide sleeve, and the pin can be inserted into the positioning sleeve.

7. The double-rotating frame structure of the bridge inspection vehicle according to any one of claims 1-6, characterized in that: The lower structure is equipped with a sliding device.

Images