Invisible well lid lifting device

Abstract

The utility model provides an invisible well lid lifting device. The invisible well lid lifting device comprises a force arm, a support and an adjustable fulcrum. The force arm comprises a hoisting end and a driving end, the hoisting end is used for hanging the invisible well lid, the force arm and the adjustable fulcrum can slide relatively, and the adjustable fulcrum is close to the hoisting end; the adjustable fulcrum comprises an adjusting mechanism, and the adjustable fulcrum is rotatably connected with the support; the adjusting mechanism is detachably connected with the force arm. Through the force arm, the support and the adjustable fulcrum, the position of the fulcrum of the force arm can be adjusted under the condition that the support is fixed, the force arm can be conveniently adjusted according to actual requirements after the support falls to the ground, more labor is saved, and meanwhile secondary carrying adjustment of the support is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting devices, and particularly relates to a lifting device for invisible manhole covers. Background Art

[0002] To beautify the environment of the production operation area or reduce the impact of manhole covers on the flatness and safety of the road surface, more and more invisible manhole covers are added in places such as airports and streets. Generally, the staff conducts opening inspection operations on each manhole cover twice a year. However, compared with the old-fashioned manhole covers, there are nearly ten sidewalk bricks or other coverings laid above the invisible manhole covers, which rapidly increases the weight of the manhole cover and suddenly raises the lifting difficulty. It requires 3 - 4 staff members to exert force simultaneously to lift the manhole cover.

[0003] Currently, when opening and resetting the invisible manhole cover, multiple people need to work simultaneously, with a large workload and high labor intensity. Using a lifting device for invisible manhole covers can reduce the number of operators, lower the labor intensity, and improve the opening efficiency. The Chinese patent document CN213037390U discloses a lever-type invisible manhole cover opening tool, and the lever-type invisible manhole cover lifting device is often bulky and relies on manpower, and it is difficult to move and adjust the lifting point after landing, making it inconvenient to use. Summary of the Utility Model

[0004] In view of the above technical problems, the utility model can adjust the fulcrum position of the force arm under the condition that the bracket is fixed through the force arm, the bracket, and the adjustable fulcrum, which is convenient to adjust the force arm according to actual needs after the bracket lands, making it more labor-saving and avoiding secondary handling and adjustment of the bracket.

[0005] The utility model provides a lifting device for invisible manhole covers in a first aspect, including: a force arm, a bracket, and an adjustable fulcrum;

[0006] The force arm includes a lifting end and a driving end for suspending the invisible manhole cover, and the force arm can slide relative to the adjustable fulcrum, and the adjustable fulcrum is close to the lifting end;

[0007] The adjustable fulcrum includes an adjusting mechanism, and the adjustable fulcrum is rotatably connected to the bracket;

[0008] The adjusting mechanism is detachably connected to the force arm.

[0009] The beneficial effect of the utility model lies in that: the lifting device for invisible manhole covers provided by the utility model fixes the hook to the hook hole of the invisible manhole cover, uses the force arm for lifting to realize the lifting and reset of the invisible manhole cover, and uses the bracket and its auxiliary devices to realize the position movement and position fixation of the invisible manhole cover. When in use, the operation is simple, practical, and labor-saving, and the secondary movement of the bracket during the operation is avoided. Brief Description of the Drawings

[0010] Figure 1 Assembly drawing of the lifting device in the embodiment of the present novelty

[0011] Figure 2 Assembly drawing of the force arm clamping hole of the lifting device in the embodiment of the present novelty

[0012] Figure 3 Top view of the assembly drawing of the lifting device in the embodiment of the present novelty

[0013] Figure 4 Rear view of the assembly drawing of the lifting device in the embodiment of the present novelty

[0014] Figure 5 Schematic structural diagram of the adjusting mechanism and the movable clamping component in the embodiment of the present novelty

[0015] Figure 6 Schematic structural diagram of the connection of the driving control mechanism in the embodiment of the present novelty

[0016] Figure 7 Schematic structural diagram of the connection of the adjusting mechanism in the embodiment of the present novelty

[0017] The meanings represented by the reference numerals in the figure: force arm 1, bracket 2, adjustable fulcrum 3, hoisting end 11, driving end 12, adjusting mechanism 31, traveling mechanism 21, support rod 22, wheel 211, wheel clamp 212, support mechanism 23, handle 13, control mechanism 14, clamping hole 15, first switch 141, second switch 142, adjusting mechanism 31, movable clamping component 32, controllable motor 311, lead screw slider 312, slide table 313, power supply 314, control module 315, pulse generator 316, instruction sending unit 143, instruction power supply 144, hoisting cable 112, hoisting hook 113. Specific implementation manners

[0018] The following embodiments further illustrate the content of the present utility model, but should not be construed as a limitation to the present utility model. Without departing from the spirit and essence of the present utility model, any modification or replacement made to the methods, steps or conditions of the present utility model shall fall within the scope of the present utility model.

[0019] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0020] The Daxing Airport oil depot has added more than 30 invisible manhole covers. Workers open and inspect each manhole cover twice a year. However, compared with the old manhole covers, the invisible manhole covers are laid with nearly ten walkway bricks, which rapidly increases the weight of the manhole covers and makes lifting difficult. It requires 3-4 workers to work together to lift the manhole cover.

[0021] In some embodiments of the present invention, Figures 1-7 As shown:

[0022] An invisible manhole cover lifting device comprises: a lever arm 1, a bracket 2, and an adjustable fulcrum 3;

[0023] The lever arm 1 comprises a hoisting end 11 and a driving end 12 for suspending the invisible manhole cover, the lever arm 1 and the adjustable fulcrum 3 can slide relative to each other, and the adjustable fulcrum 3 is close to the hoisting end 11;

[0024] The adjustable fulcrum 3 includes an adjusting mechanism 31, and the adjustable fulcrum 3 is rotatably connected to the bracket 2;

[0025] The adjusting mechanism 31 is detachably connected to the lever arm 1 .

[0026] In these embodiments:

[0027] The main body of the lever arm 1 is a hard rod, which can be made of aluminum alloy, titanium alloy, nickel-based alloy, stainless steel, etc. It can be a hollow rod or a solid rod; the shape can be a round rod, a polygonal rod, a hollow rod, a sleeve rod, or one or more combinations of the above shapes.

[0028] The support 2 is used to support the lever 1 and the adjustable fulcrum 3 away from the ground. The support 2 can be set as a foot, a geometric platform, and a moving mechanism can be added, such as wheels, track wheels, etc.; a steering mechanism to assist the fulcrum to turn in the horizontal plane, such as installing a rotatable platform between the support and the adjustable fulcrum;

[0029] The adjustable fulcrum 3 is movable relative to the lever arm 1. The lever arm 1 can move axially within the adjustable fulcrum 3, and the adjustable fulcrum 3 can release or lock the lever arm 1. The adjustable fulcrum 3 includes at least one hollow tube with an inner diameter larger than the outer diameter of the lever arm 1. The lever arm 1 can pass through the hollow tube and move relative to it. The inner wall of the hollow tube can be circular or polygonal, and correspondingly, the outer wall of the lever arm 1 can be cylindrical or polygonal prism-shaped.

[0030] The adjustable fulcrum 3 is generally located at a position on the lever arm 1 close to the hoisting end, and the distance from this position to the hoisting end is less than or equal to one-third of the total length of the lever arm, which is convenient for workers to hoist the invisible manhole cover.

[0031] When the support is in place, or when it is necessary to adjust the positions of the driving end and the hoisting end and the lever arm ratio during the hoisting process, the adjustable fulcrum releases the lever arm 1 so that the lever arm can move axially within the adjustable fulcrum 3. When it is not necessary to change the lever arm 1, the adjustable fulcrum locks the lever arm 1 to prevent accidental sliding. Sometimes the invisible manhole cover is set at the edge of the road or building, and the placement position of the support may be limited. The movable lever arm 1 can provide a larger operating space. By moving the lever arm 1 axially towards the driving end, the torque at the driving end increases, making it easier to lift the manhole cover. It is also possible to flexibly adjust the position of the lever arm and the manhole cover without moving the support.

[0032] In some embodiments of the present invention, as Figures 1-7 shown, the difference from the above embodiments is that:

[0033] The support 2 includes a traveling mechanism 21 and a support rod 22;

[0034] The traveling mechanism 21 includes at least one wheel 211 and a wheel clamp 212. The wheel 211 is rotatably installed at the bottom end of the support 2, and the opening of the wheel clamp 212 is detachably connected to the wheel 211. The wheel clamp 212 is fixedly connected to the bottom end of the support rod 22.

[0035] In these embodiments:

[0036] The traveling mechanism 21 assists the movement of the support 2. In this embodiment, the traveling mechanism includes a wheel 211 and a wheel clamp 212. The wheel can be a hollow tire or a solid tire; the shape can be a spherical tire or a circular tire; other structures such as a universal wheel or a McMullen wheel can also be used;

[0037] When it is not necessary to move the support, the wheel clamp 212 locks the wheel or the axle, fixing the overall position of the support 2, facilitating operation, reducing the risk of accidental movement, and improving the safety of the operation.

[0038] In some embodiments of the present invention, as Figures 1-7 shown, the difference from the above embodiments is that:

[0039] The bracket 2 includes a support mechanism 23, and the support mechanism 23 includes a plurality of feet that can contact the ground.

[0040] In these embodiments:

[0041] The support mechanism 23 is used to support and stabilize the position of the bracket. The feet form a tripod structure to provide stable support for the bracket, fix the overall position of the bracket 2, facilitate operation, reduce the risk of accidental movement, and improve the safety of operation.

[0042] In some embodiments of the present invention, as Figures 1-7 shown, the difference from the above embodiments is that:

[0043] The lever arm 1 includes a handle 13, and the handle 13 is fixedly connected to the driving end 12.

[0044] In these embodiments:

[0045] The handle 13 is horizontally arranged and is connected to the driving end 12 of the lever arm in a T shape, which is convenient for holding and applying force with both hands.

[0046] In some embodiments of the present invention, as Figures 1-7 shown, the difference from the above embodiments is that:

[0047] The lever arm 1 includes a control mechanism 14, and the control mechanism 14 includes a first switch 141 and a second switch 142.

[0048] The first switch 141, the second switch 142, and the adjustable fulcrum 3 are electrically connected in sequence.

[0049] In these embodiments:

[0050] The first switch 141 and the second switch 142 are series switches. When both the first switch 141 and the second switch 142 are pressed, the lever arm 1 can slide in the adjustable fulcrum 3. The adjustable fulcrum includes a limit groove, and the lever arm includes a protrusion. The protrusion and the limit groove can limit the overall axial movement of the lever arm along the lever arm axis and prevent circumferential rotation in the adjustable fulcrum.

[0051] When loaded or unloaded, the device itself has a certain weight. Using a double-switch start can prevent accidental touch and cause the lever arm to slide under unexpected conditions, improving control safety.

[0052] When the first switch 141 and the second switch 142 are released, the adjustable fulcrum 3 and the lever arm 1 are automatically relatively fixed, preventing the lever arm from sliding under unexpected conditions due to untimely reset and improving control safety.

[0053] In some embodiments of the present invention, asFigures 1-7 As shown, the difference from the above embodiments lies in that:

[0054] The adjustable fulcrum 3 includes an adjustment mechanism 31 and a movable clamping component 32. The movable clamping component 32 is clamped with the force arm 1, and the adjustment mechanism 31 is movably connected to the movable clamping component 32.

[0055] In some embodiments of the present invention, such as Figures 1-7 As shown, the difference from the above embodiments lies in that:

[0056] The force arm 1 includes a plurality of clamping holes 15. The adjustment mechanism 31 includes: a controllable motor 311, a lead screw slider 312, a slide table 313, and the movable clamping component 32 includes a slider sleeve shaft 321;

[0057] The controllable motor 311 is threadedly connected to the lead screw slider 312, and the lead screw slider 312 is slidably connected to the slide table 313;

[0058] The slider sleeve shaft 321 is fixedly connected to the slide table 313, and the slider sleeve shaft 321 is clamped with the clamping hole 15 of the force arm 1.

[0059] In these embodiments:

[0060] The adjustment mechanism 31 drives the movable clamping component 32 to be clamped with the force arm 1; a plurality of clamping holes are provided on the force arm 1, and their shapes can be circular or polygonal; the slider sleeve shaft 321 in the corresponding movable clamping component 32 can be a cylinder or a prism; the controllable motor 311 drives the lead screw slider 312 to slide on the slide table 313, thereby driving the slider sleeve shaft 321 to move in the clamping hole 15, playing a role in releasing and locking the force arm.

[0061] In some embodiments of the present invention, such as Figures 1-7 As shown, the difference from the above embodiments lies in that:

[0062] The adjustment mechanism 31 further includes a power supply 314, a control module 315, and a pulse generator 316;

[0063] The controllable motor 311, the control module 315, and the pulse generator 316 are all electrically connected to the power supply 314;

[0064] The controllable motor 311 and the pulse generator 316 are both electrically connected to the control module 315.

[0065] In these embodiments:

[0066] The controllable motor 311 can be a stepper motor, which requires a pulse generator for control. The control module receives the release signals sent by the first switch 141 and the second switch 142, controls the pulse generator to send pulses, and the controllable motor 311 drives the slider sleeve shaft 321 to withdraw from the clamping hole 15, and the lever arm is released from the adjustable fulcrum;

[0067] 28 Micro screw rod slide table, such as HGX28.

[0068] If either the first switch 141 or the second switch 142 is not triggered, or returns to its original state after being triggered, the control module controls the pulse generator to send pulses, and the controllable motor 311 drives the slider sleeve shaft 321 to be clamped into the clamping hole 15, and the lever arm is locked in the adjustable fulcrum.

[0069] According to the comprehensive design of the controllable motor 311, the control module 315, and the pulse generator 316 in the adjustment mechanism 31, the automatic locking function improves the safety of the equipment. At the same time, it realizes the flexible release and automatic locking of the adjustable fulcrum and the lever arm, improving the operation convenience.

[0070] In some embodiments of the present invention, such as Figures 1-7 As shown, the difference from the above embodiments is that:

[0071] The control mechanism 14 further includes an instruction sending unit 143 and an instruction power supply 144. The first switch 141, the second switch 142 are connected in series with the instruction sending unit 143 and the instruction power supply 144.

[0072] In these embodiments:

[0073] When the first switch 141 and the second switch 142 are pressed simultaneously, the switch circuit is turned on to send a start signal, and the adjustable fulcrum releases the lever arm according to the start signal; when either the first switch 141 or the second switch 142 is released, the adjustable fulcrum automatically relocks the lever arm; the dual switches avoid accidental touch during operation, avoid potential safety hazards, improve safety, and at the same time control the release and locking of the adjustable fulcrum and the lever arm, improving the operation convenience of the device.

[0074] In some embodiments of the present invention, such as Figures 1-7 As shown, the difference from the above embodiments is that:

[0075] The lifting end 11 includes a plurality of lifting cables 112 and a lifting hook 113. The end of the lifting cable 112 is fixedly connected to the lifting hook 113, and the lifting hook 113 is detachably connected to the invisible manhole cover.

[0076] In these embodiments:

[0077] The lifting cable 112 can be a high-strength flexible cable such as a steel cable, nylon rope, metal chain, etc.; a rigid boom can also be selected;

[0078] The lifting hook 113 can be a rigid hook member such as a magnetic suction hook or an iron hook, and is fixedly connected to the lifting cable 112.

[0079] The lifting cable 112 can provide a certain range of movement for the lifting hook 113, facilitating the connection of the lifting hook 113 with the hidden manhole cover and lifting the manhole cover.

[0080] The technical effects of the present utility model are multi-faceted.

[0081] The dual switches avoid accidental touch during operation, eliminate potential safety hazards, and improve safety. At the same time, they control the release and locking of the adjustable fulcrum and the lever arm, improving the operation convenience of the device. The movable lever arm 1 can provide a larger operating space. Moving the lever arm 1 axially towards the driving end increases the torque at the driving end, making it easier to lift the manhole cover. It is also possible to flexibly adjust the position of the lever arm and the manhole cover without moving the bracket.

[0082] Although the present utility model has been described in detail above with general descriptions, specific embodiments and tests, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model fall within the scope of protection required by the present utility model.

Claims

1. An invisible manhole cover lifting device, characterized in that: include: A lever arm (1), a bracket (2), and an adjustable fulcrum (3); The lever arm (1) comprises a hoisting end (11) and a driving end (12) for suspending the invisible manhole cover, the lever arm (1) is detachably connected to the adjustable fulcrum (3), and the adjustable fulcrum (3) is close to the hoisting end (11); The adjustable fulcrum (3) comprises an adjusting mechanism (31), and the adjustable fulcrum (3) is rotatably connected to the bracket (2); The adjustment mechanism (31) is detachably connected to the force arm (1).

2. The invisible manhole cover lifting device according to claim 1 is characterized in that: The support (2) comprises a walking mechanism (21) and a support rod (22); The walking mechanism (21) comprises at least one wheel (211) and a wheel clamp (212); the wheel (211) is rotatably mounted on the bottom end of the bracket (2); an opening of the wheel clamp (212) is detachably connected to the wheel (211); and the wheel clamp (212) is fixedly connected to the bottom end of the support rod (22).

3. The invisible manhole cover lifting device according to claim 2 is characterized in that: The support (2) comprises a support mechanism (23), and the support mechanism (23) comprises a plurality of supporting feet that can contact the ground.

4. The invisible manhole cover lifting device according to claim 1, characterized in that: The lever arm (1) comprises a handle (13), and the handle (13) is fixedly connected to the driving end (12).

5. The invisible manhole cover lifting device according to claim 1, characterized in that: The lever arm (1) comprises a control mechanism (14), wherein the control mechanism (14) comprises a first switch (141) and a second switch (142), The first switch (141), the second switch (142), and the adjustable fulcrum (3) are electrically connected in sequence.

6. The invisible manhole cover lifting device according to claim 5, characterized in that: The adjustable fulcrum (3) comprises an adjusting mechanism (31) and a movable clamping assembly (32); the force arm (1) comprises a plurality of clamping holes (15); the movable clamping assembly (32) is clamped with the force arm (1); and the adjusting mechanism (31) is movably connected with the movable clamping assembly (32).

7. The invisible manhole cover lifting device according to claim 6, characterized in that: The adjusting mechanism (31) comprises: a controllable motor (311), a lead screw slider (312), a slide table (313), and the movable clamping assembly (32) comprises a slider sleeve shaft; The controllable motor (311) is threadedly connected to the lead screw slider (312), and the lead screw slider (312) is slidably connected to the slide table (313); The slider sleeve shaft is fixedly connected to the slide table (313), and the slider sleeve shaft is clamped to the clamping hole (15) of the force arm (1).

8. The invisible manhole cover lifting device according to claim 7, characterized in that: The regulating mechanism (31) further includes a power supply (314), a control module (315), and a pulse generator (316); The controllable motor (311), the control module (315), and the pulse generator (316) are all electrically connected to the power source (314); One end of the pulse generator (316) is electrically connected to the control module (315), and the other end is electrically connected to the controllable motor (311).

9. The invisible manhole cover lifting device according to claim 7, characterized in that: The control mechanism (14) further comprises an instruction sending unit (143) and an instruction power supply (144); the first switch (141) and the second switch (142) are connected in series with the instruction sending unit (143) and the instruction power supply (144).

10. The invisible manhole cover lifting device according to claim 1, characterized in that: The lifting end (11) comprises a plurality of lifting ropes (112) and a lifting hook (113); the ends of the lifting ropes (112) are fixedly connected to the lifting hooks (113); and the lifting hooks (113) are detachably connected to the invisible manhole cover.

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