Novel well lid lifter

Abstract

The invention discloses a novel well lid lifter which comprises a cross beam which is of a non-circular structure with the consistent outer contour shape of the cross section. A vertical frame; the driving cylinder is hinged to the longitudinal frame; the middle of the hinge seat is fixed to the middle of the cross beam, the hinge seat is provided with a first end and a second end which extend from the middle and form an obtuse angle, the first end is hinged to the longitudinal frame, and the second end is hinged to the output end of the driving cylinder; the two hanging mechanisms are arranged on the cross beam in a sliding manner; the rear wheel assembly is arranged on the tail side of the longitudinal frame; a front wheel assembly; an auxiliary walking mechanism; and a balance maintaining mechanism. In the walking process, the auxiliary walking mechanism, the front wheel assembly and the rear wheel assembly jointly play a supporting role, in the lifting stage, the output end of the driving cylinder stretches out to drive the hinge base and the cross beam to turn over around the first end, and the second end and the third end turn over forwards and backwards correspondingly; the first connecting rod is driven to pull the first supporting wheel frame to rotate backwards, the second connecting rod is driven to pull the second supporting wheel frame to rotate forwards, and finally the supporting height of the auxiliary walking mechanism is adjusted in a linkage mode to adapt to lifting of the longitudinal frame, so that one more supporting structure is obtained all the time in the walking process and the lifting process. And the stability of each stage is effectively improved.

Description

Technical Field

[0001] This invention relates to manhole cover lifting equipment, and more particularly to a novel manhole cover lifting device. Background Technology

[0002] Manhole covers are facilities that cover the entrances to inspection wells for underground pipelines, cables, etc. in cities. Their main functions are to prevent falls and facilitate pipeline maintenance, and they are widely used.

[0003] The cables and other cables under the manhole cover require frequent maintenance or additional wiring, which means that the manhole cover needs to be opened frequently. However, due to the weight of the manhole cover, it is difficult to lift it manually. Therefore, our company has filed a patent application with application number 2023231047314 disclosing a heavy-duty manhole cover electric opening device and an automatic hooking heavy-duty manhole cover electric opening device with application number 202311533857.5. Both of them use a telescopic rod to drive the front wheel frame to rotate and lift the measuring device, thereby lifting the manhole cover through the hook on the crossbeam.

[0004] However, during subsequent use, we discovered the following two problems with this structure: 1. Due to the relatively long lengths of the longitudinal and transverse beams, although the static stability meets the requirements, the dynamic stability is poor during operation due to the insufficient number of support points; 2. During hoisting, because the lifting lugs are flat-bottomed U-shaped structures, the hook placement is not fixed. In addition, the manhole cover is a reinforced concrete structure, and its internal texture cannot be completely uniform. These two factors can cause the manhole cover to be unevenly weighted during hoisting, which can lead to the manhole cover flipping over and potentially causing danger. Summary of the Invention

[0005] The present invention addresses the problems in the prior art, and the technical problem to be solved by the present invention is to provide a new type of manhole cover lifting device.

[0006] The technical solution adopted by this invention to solve the above-mentioned technical problems is: a novel manhole cover lifting device, comprising: A crossbeam is a non-circular structure with a uniform cross-sectional outer contour. Longitudinal frame; Drive cylinder, which is hinged to the longitudinal frame; The hinge seat is fixed to the middle of the crossbeam and has a first end and a second end extending from the middle at an obtuse angle. The first end is hinged to the longitudinal frame and the second end is hinged to the output end of the drive cylinder. The suspension mechanism comprises two components that are slidably mounted on the crossbeam. The rear wheel assembly is located at the rear side of the longitudinal frame; The front wheel assembly includes two wheels symmetrically arranged on both sides of the crossbeam via wheel frames. When the drive cylinder extends, it drives the crossbeam to rotate around the hinge point between the first end of the hinge seat and the longitudinal frame. When the crossbeam rotates, it drives the wheel frames to rotate. The angle between the wheel frames and the ground changes, thereby raising the crossbeam and its hanging mechanism, and vice versa. It also includes a symmetrical auxiliary walking mechanism, which includes: The third end is located in the middle of the hinge seat and forms an obtuse angle with the first and second ends; The first support wheel frame is rotatably mounted on the longitudinal frame, and the bottom end is provided with the first support wheel; The first connecting rod has one end hinged to the top of the first support wheel frame and the other end hinged coaxially to the output end of the drive cylinder. The second support wheel frame is rotatably mounted on the longitudinal frame and its rotatable connection point is located in front of the rotatable connection point of the second support wheel frame. The bottom end of the second support wheel is provided with a second support wheel, which forms an intersecting X-shaped structure with the first support wheel frame and a tension spring is provided above the intersection point. The second link has one end hinged to the third end and the other end hinged to the top of the second support wheel frame; When the electric cylinder extends, the first link pulls the first support wheel frame forward, while the second link pushes the second support wheel frame backward, thus raising the support height of the first and second support wheel frames.

[0007] Preferably, a balance-maintaining mechanism is also included, which includes: The third link has one end hinged to the bottom of the longitudinal frame and the other end equipped with a pressure roller; The fourth link has one end hinged to the hinge shaft where the third link and the second link are hinged, and the other end hinged between the two ends of the third link. When the third link is flipped backward for hoisting, the center of the manhole cover moves forward and the top surface of the rear side flips upward to abut against the pressure roller. Then the fourth link drives the third link to swing backward, thereby reducing the gap between the pressure roller and the ground, thus pressing down on the top surface of the rear side of the manhole cover and causing it to flip downward until it is completely lifted, ensuring that the manhole cover is in a horizontal state.

[0008] Preferably, the lower part of the third link is a telescopic structure, which allows the position of the pressure roller to be adjusted by telescopic adjustment.

[0009] As a preferred option, the suspension mechanism includes: A sliding seat is slidably mounted on a crossbeam and has a groove parallel to the crossbeam. The linkage rod has two ends connected to the sliding seat and the longitudinal frame respectively via two universal joints; The hook seat is slidably disposed within a groove; A spring, which is located in a groove and exerts a spring force on the hook seat to slide towards the middle of the crossbeam; A hook is mounted on a hook seat and used to hang the manhole cover lugs for lifting. During the hooking stage, the drive cylinder extends, and the linkage rod pulls the sliding seat to slide towards the middle of the crossbeam, so that the hook automatically slides to below the manhole cover lifting lug. During the continued lifting stage, the hook is raised, and the distance between the two hooks is less than the distance between the two lifting lugs. At this time, the two hooks are pulled outward under the weight of the manhole cover, and the spring is compressed for automatic adjustment.

[0010] Preferably, the front wheel assembly includes a sliding seat slidably mounted on a crossbeam, a wheel frame mounted on the sliding seat, and a front wheel body mounted on the wheel frame. The sliding seat is provided with a through-type locking bolt, and the inner end of the locking bolt abuts against the crossbeam to lock the sliding seat.

[0011] Preferably, the longitudinal frame is equipped with a handle for rotation.

[0012] Preferably, the rear wheel assembly includes two rear wheel bodies arranged side by side.

[0013] Preferably, a control box is provided above the longitudinal frame. The control box is electrically connected to the drive cylinder to control the movement of the drive cylinder. The control box is equipped with a wireless communication module and an external remote control. The wireless communication module is either a Bluetooth module or an infrared module.

[0014] Preferably, the hinged seat includes a mounting sleeve that is sleeved and detachably fixed to the middle of the crossbeam and a horn plate that is sleeved and fixed to the outer wall of the mounting sleeve. The horn plate is provided with three mounting horns, which are obtuse angles between adjacent mounting horns, and the ends of the three mounting horns are respectively the first end, the second end, and the third end.

[0015] Preferably, the steering wheel includes two pieces, which are spaced apart, and the two steering wheel pieces clamp the longitudinal frame, the output end of the drive cylinder and the fourth connecting rod respectively.

[0016] Compared with the prior art, the present invention has the following advantages: In the process of walking, the auxiliary walking mechanism, the front wheel assembly and the rear wheel assembly work together to provide support. In the lifting stage, the output end of the drive cylinder extends the drive hinge seat and the crossbeam rotates around the first end, while the second and third ends rotate forward and backward respectively. This drives the first link to pull the first support wheel frame to rotate backward and the second link to pull the second support wheel frame to rotate forward. Finally, the support height of the auxiliary walking mechanism is adjusted in linkage to adapt to the raising of the longitudinal frame, so that there is always an extra set of support structures in both the walking and lifting processes, which effectively improves the stability of each stage. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a perspective view of the present application; Figure 2 This is a perspective view of the present application; Figure 3 This is a perspective view (bottom) of this application; Figure 4 This is a perspective view (bottom) of this application; Figure 5 This is a side view of this application; Figure 6 for Figure 2 Enlarged view of point A in the middle; Figure 7 A 3D view of the hinge location; In the diagram: 10, crossbeam; 20, longitudinal frame; 201, handle; 202, control box; 30, hanging mechanism; 301, sliding seat; 3011, slide groove; 302, spring; 303, hook seat; 304, hook; 40, hinge; 401, first end; 402, second end; 403, third end; 50, front wheel assembly; 501, sliding seat; 502, wheel frame; 503, front wheel body; 60, rear wheel assembly; 601, rear wheel body; 70, drive cylinder; 80, balance holding mechanism; 801, fourth link; 802, third link; 803, pressure roller; 90, auxiliary walking mechanism; 901, first support wheel frame; 902, second support wheel frame; 903, first link; 904, second link; 905, tension spring; 906, first support wheel; 907, second support wheel. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0020] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures. Example

[0021] This embodiment mainly describes the title of the new type of manhole cover lifting device, as follows: like Figure 1-7As shown, the new type of manhole cover lifting device has a crossbeam 10, which is a non-circular structure with a consistent cross-sectional outer contour. 20 longitudinal frames; Drive cylinder 70, which is hinged to longitudinal frame 20; The hinge 40 is fixed to the middle of the crossbeam 10. It has a first end 401 and a second end 402 extending from the middle at an obtuse angle. The first end 401 is hinged to the longitudinal frame 20, and the second end 402 is hinged to the output end of the drive cylinder 70. The suspension mechanism 30 comprises two parts that are slidably mounted on the crossbeam 10; Rear wheel assembly 60, which is located on the rear side of longitudinal frame 20; The front wheel assembly 50 includes two wheels symmetrically arranged on both sides of the crossbeam 10 via wheel frames 502. When the drive cylinder 70 extends, it drives the crossbeam 10 to rotate around the hinge point between the first end 401 of the hinge member 40 and the longitudinal frame 20. When the crossbeam 10 rotates, it drives the wheel frame 502 to rotate. The angle between the wheel frame 502 and the ground changes, thereby raising the crossbeam 10 and the hanging mechanism 30 on it, and lowering it if the angle changes. It also includes a symmetrical auxiliary walking mechanism 90, which includes: The third end 403 is located in the middle of the hinge 40 and forms an obtuse angle with the first end 401 and the second end 402. The first support wheel frame 901 is rotatably mounted on the longitudinal frame 20, and its bottom end is provided with a first support wheel 906; The first connecting rod 903 has one end hinged to the top of the first support wheel frame 901, and the other end hinged coaxially to the output end of the drive cylinder 70. The second support wheel frame 902 is rotatably mounted on the longitudinal frame 20 and its rotatable connection point is located in front of the rotatable connection point of the second support wheel frame 902. Its bottom end is provided with a second support wheel 907, which forms an intersecting X-shaped structure with the first support wheel frame 901 and a tension spring 905 is provided above the intersection point. The second link 904 has one end hinged to the third end 403 and the other end hinged to the top of the second support wheel frame 902; When the drive cylinder 70 extends, the first connecting rod 903 pulls the first support wheel frame 901 forward, while the second connecting rod 904 pushes the second support wheel frame 902 backward, thus raising the support height of the first support wheel frame 901 and the second support wheel frame 902. The two first support wheels 906 on the left and right sides are connected together by axles, and the two second support wheels 907 on the left and right sides are also connected together by axles. In this design, the auxiliary walking mechanism 90, the front wheel assembly 50, and the rear wheel assembly 60 work together to provide support during the walking process. During the lifting phase, the output end of the drive cylinder 70 extends the drive hinge 40 and the crossbeam 10 to rotate around the first end 401. The second end 402 and the third end 403 rotate forward and backward, respectively, which respectively drive the first connecting rod 903 to pull the first support wheel frame 901 to rotate backward and the second connecting rod 904 to pull the second support wheel frame 902 to rotate forward. Finally, the support height of the auxiliary walking mechanism 90 is adjusted in conjunction with the lifting of the longitudinal frame 20, so that there is always an extra set of support structures during the walking and lifting processes, which effectively improves the stability at each stage.

[0022] Preferably, a balance holding mechanism 80 is also included, which includes: The third link 802 has one end hinged to the bottom of the longitudinal frame 20, and the other end is provided with a pressure roller 803; The fourth connecting rod 801 has one end hinged to the hinge shaft connecting the third end 403 and the second connecting rod 904, and the other end hinged between the two ends of the third connecting rod 802. When the third end 403 flips backward for hoisting, the center of the manhole cover moves forward and the top surface of the rear side flips upward to abut against the pressure roller 803. Then, the fourth connecting rod 801 drives the third connecting rod 802 to swing backward, thereby reducing the clearance of the pressure roller 803 from the ground and pressing down on the top surface of the rear side of the manhole cover, causing it to flip downward until it is fully lifted, ensuring that the manhole cover is in a horizontal state. This scheme utilizes the characteristic of the third end 403 of the hinge 40 to flip backward, driving the fourth connecting rod 801 to push backward, thereby driving the third connecting rod 802 to flip backward and reduce the clearance from the ground. In the final state, its height from the ground is consistent with the height of the top surface of the manhole cover in a horizontal state. It is important to note that when hooking the hook 304, the weight on the front side of the hook 304 should be greater than the weight on the rear side. That is, if it is not possible to ensure that the weights are consistent, hook the hook 304 to the rear to increase the weight on the front side, which will eventually cause the rear side of the manhole cover to flip upward. Then, the pressure roller 803 is set to limit the movement on the rear side. This will ensure that the manhole cover will not flip during the hoisting process.

[0023] Preferably, the lower part of the third link 802 is a telescopic structure, which allows the position of the pressure roller 803 to be adjusted by telescoping. This structure can be used to adjust the position of the pressure roller 803 after it has been hoisted into place during the initial commissioning process, ensuring the accuracy of its abutment position.

[0024] Preferably, the suspension mechanism 30 includes: The sliding seat 301 is slidably disposed on the crossbeam 10, and has a sliding groove 3011 parallel to the crossbeam 10. The linkage rod is connected at both ends to the sliding seat 301 and the longitudinal frame 20 respectively via two universal joints; The hook seat 303 is slidably disposed within the slide groove 3011; Spring 302 is disposed in slide groove 3011 and applies elastic force to hook seat 303 to slide towards the middle of crossbeam 10; The hook 304 is mounted on the hook seat 303 and is used to hang on the manhole cover lifting lug for lifting. During the hooking stage, the drive cylinder 70 extends, and the linkage rod pulls the sliding seat 301 to slide towards the middle of the crossbeam 10, thereby causing the hook 304 to automatically slide to below the manhole cover lifting lug. During the continued lifting stage, the hook 304 is lifted, and the distance between the two hooks 304 is less than the distance between the two lifting lugs. At this time, the two hooks 304 are pulled outward under the action of the manhole cover's weight, and the compression spring 302 is automatically adjusted. This solution achieves automatic hooking and unhooking. The specific operating steps are as follows: push the entire device above the manhole cover so that the two front wheels are located on the outer sides of both ends of the manhole cover. At this time, the two hooks 304 are located on both sides of the two lifting lugs on the manhole cover and are lower than the top of the openings of the two lifting lugs. Start the drive cylinder 70, the hinge 40 flips, and the two linkage rods pull the sliding seat 301 to slide towards the middle of the crossbeam 10. The hook 304 moves towards the middle and rises to hook up. After hooking up, when the lifting continues, the sliding seat 301 will continue to be pulled towards the middle. During this process, under the action of the gravity of the manhole cover, the hook seat 303 remains in place or moves at a small distance, while the sliding seat 301 is pulled inward by the linkage rods. This ensures that the hook 304 is in a vertical state and is not pulled to an inclined state by the linkage rods.

[0025] Preferably, the front wheel assembly 50 includes a sliding seat 501 slidably mounted on the crossbeam 10, a wheel frame 502 mounted on the sliding seat 501, and a front wheel body 503 mounted on the wheel frame 502. The sliding seat 501 is provided with a through-type locking bolt, the inner end of which abuts against the crossbeam 10 to lock the sliding seat 501. This structure provides space for adjusting the position of the front wheel.

[0026] Preferably, a handle 201 is rotatably provided on the longitudinal frame 20. The handle 201 is used for movement after being lifted.

[0027] Preferably, the rear wheel assembly 60 includes two rear wheel bodies 601 arranged side by side. The two rear wheel bodies 601 form a dual support point, which improves the stability of the rear position.

[0028] Preferably, a control box 202 is provided above the longitudinal frame 20. The control box 202 is electrically connected to the drive cylinder 70 to control the action of the drive cylinder 70. The control box 202 is equipped with a wireless communication module and an external remote control. The wireless communication module is a Bluetooth module or an infrared module.

[0029] Preferably, the hinge 40 includes a mounting sleeve that is sleeved and detachably fixed to the middle of the crossbeam 10, and a horn plate that is sleeved and fixed to the outer wall of the mounting sleeve. The horn plate has three mounting horns, with obtuse angles between adjacent mounting horns, and the ends of the three mounting horns are respectively a first end 401, a second end 402, and a third end 403. One of the three horns is used to hinge the longitudinal frame 20 to form a rotation point, and the other two, during rotation, one flips backward and the other flips forward so that the various connecting rods can be linked together.

[0030] Preferably, the hinge plates consist of two pieces, spaced apart, which respectively clamp the longitudinal frame 20, the output end of the drive cylinder 70, and the fourth connecting rod 801. The double-row hinge plates facilitate the installation of the longitudinal frame 20, the output end of the drive cylinder 70, and the fourth connecting rod 801, and also improve the strength of the hinge 40.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

Claims

1. A new type of manhole cover lifting device, including: A crossbeam is a non-circular structure with a uniform cross-sectional outer contour. Longitudinal frame; Drive cylinder, which is hinged to the longitudinal frame; The hinge seat is fixed to the middle of the crossbeam and has a first end and a second end extending from the middle at an obtuse angle. The first end is hinged to the longitudinal frame and the second end is hinged to the output end of the drive cylinder. The suspension mechanism comprises two components that are slidably mounted on the crossbeam. The rear wheel assembly is located at the rear side of the longitudinal frame; The front wheel assembly includes two wheels symmetrically arranged on both sides of the crossbeam via wheel frames. When the drive cylinder extends, it drives the crossbeam to rotate around the hinge point between the first end of the hinge seat and the longitudinal frame. When the crossbeam rotates, it drives the wheel frames to rotate. The angle between the wheel frames and the ground changes, thereby raising the crossbeam and its hanging mechanism, and vice versa. Its characteristic is that it further includes a symmetrical auxiliary walking mechanism, the auxiliary walking mechanism comprising: The third end is located in the middle of the hinge seat and forms an obtuse angle with the first and second ends; The first support wheel frame is rotatably mounted on the longitudinal frame, and the bottom end is provided with the first support wheel; The first connecting rod has one end hinged to the top of the first support wheel frame and the other end hinged coaxially to the output end of the drive cylinder. The second support wheel frame is rotatably mounted on the longitudinal frame and its rotatable connection point is located in front of the rotatable connection point of the second support wheel frame. The bottom end of the second support wheel is provided with a second support wheel, which forms an intersecting X-shaped structure with the first support wheel frame and a tension spring is provided above the intersection point. The second link has one end hinged to the third end and the other end hinged to the top of the second support wheel frame; When the electric cylinder extends, the first link pulls the first support wheel frame forward, while the second link pushes the second support wheel frame backward, thus raising the support height of the first and second support wheel frames.

2. The novel manhole cover lifting device according to claim 2, characterized in that, It also includes a balance-maintaining mechanism, which includes: The third link has one end hinged to the bottom of the longitudinal frame and the other end equipped with a pressure roller; The fourth link has one end hinged to the hinge shaft where the third link and the second link are hinged, and the other end hinged between the two ends of the third link. When the third link is flipped backward for hoisting, the center of the manhole cover moves forward and the top surface of the rear side flips upward to abut against the pressure roller. Then the fourth link drives the third link to swing backward, thereby reducing the gap between the pressure roller and the ground, thus pressing down on the top surface of the rear side of the manhole cover and causing it to flip downward until it is completely lifted, ensuring that the manhole cover is in a horizontal state.

3. The novel manhole cover lifting device according to claim 2, characterized in that, The lower part of the third link has a telescopic structure, which allows the position of the pressure roller to be adjusted by telescoping.

4. The novel manhole cover lifting device according to claim 1, characterized in that, The suspension mechanism includes: A sliding seat is slidably mounted on a crossbeam and has a groove parallel to the crossbeam. The linkage rod has two ends connected to the sliding seat and the longitudinal frame respectively via two universal joints; The hook seat is slidably disposed within a groove; A spring, which is located in a groove and exerts a spring force on the hook seat to slide towards the middle of the crossbeam; A hook is mounted on a hook seat and used to hang the manhole cover lugs for lifting. During the hooking stage, the drive cylinder extends, and the linkage rod pulls the sliding seat to slide towards the middle of the crossbeam, so that the hook automatically slides to below the manhole cover lifting lug. During the continued lifting stage, the hook is raised, and the distance between the two hooks is less than the distance between the two lifting lugs. At this time, the two hooks are pulled outward under the weight of the manhole cover, and the spring is compressed for automatic adjustment.

5. The novel manhole cover lifting device according to claim 1, characterized in that, The front wheel assembly includes a sliding seat that is slidably mounted on a crossbeam, a wheel frame mounted on the sliding seat, and a front wheel body mounted on the wheel frame. The sliding seat is provided with a through-type locking bolt, and the inner end of the locking bolt abuts against the crossbeam to lock the sliding seat.

6. The novel manhole cover lifting device according to claim 1, characterized in that, The longitudinal frame is equipped with a handle for rotation.

7. The novel manhole cover lifting device according to claim 1, characterized in that, The rear wheel assembly consists of two rear wheel bodies arranged side by side.

8. The novel manhole cover lifting device according to claim 1, characterized in that, A control box is located above the longitudinal frame. The control box is electrically connected to the drive cylinder to control the movement of the drive cylinder. The control box is equipped with a wireless communication module and an external remote control. The wireless communication module is either a Bluetooth module or an infrared module.

9. The novel manhole cover lifting device according to claim 1, characterized in that, The hinged seat includes a mounting sleeve that is sleeved and detachably fixed to the middle of the crossbeam and a horn plate that is sleeved and fixed to the outer wall of the mounting sleeve. The horn plate is provided with three mounting horns, which are obtuse angles between adjacent mounting horns, and the ends of the three mounting horns are the first end, the second end, and the third end, respectively.

10. The novel manhole cover lifting device according to claim 9, characterized in that, The steering wheel clamp consists of two pieces, spaced apart, which clamp the longitudinal frame, the output end of the drive cylinder, and the fourth connecting rod, respectively.

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