A manhole cover lifting device

Abstract

This utility model relates to a manhole cover lifting device, comprising: a support frame, a lifting rod, a bearing component, and a rotary drive component. The support frame includes a support crossbar and support feet disposed at both ends of the support crossbar. A through mounting hole is provided in the middle of the support crossbar, and the lifting rod passes through the mounting hole. Abutment protrusion is provided at the lower end of the lifting rod, and external threads are provided on the outer periphery of the lifting rod. The bearing component is disposed on the support crossbar and sleeved on the outside of the lifting rod. The rotary drive component is connected to the bearing component to rotate with it. The rotary drive component has an internal thread threaded to the external thread, and a rotary operating part is provided on the rotary drive component. The manhole cover lifting device of this application has the following advantages: labor-saving operation, high safety, high efficiency, simple device, simple structure, and convenient user portability.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and in particular to a manhole cover lifting device. Background Technology

[0002] Traditional manhole covers (such as ductile iron or concrete manhole covers) typically weigh 50 kg or more, requiring 2-3 people to lift them manually, and present the following problems:

[0003] 1. Difficult to operate: Relying on simple tools such as crowbars and chains, applying force at a single point can easily cause the manhole cover to tilt, increasing the risk of lower back strain;

[0004] 2. Poor safety: Manhole covers are prone to slipping during lifting, causing injuries. There are many work-related injuries caused by improper operation of manhole covers during construction.

[0005] 3. Low efficiency: Traditional tools take an average of 5-8 minutes to lift and require frequent adjustments to the point of application of force.

[0006] On the other hand, there are existing hydraulic lifting devices, but they are large in size (weight > 30kg) and inconvenient to carry to narrow alleys or green belts for operation.

[0007] To address the aforementioned shortcomings, this application proposes a lightweight and labor-saving manhole cover lifting device. Utility Model Content

[0008] Therefore, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a manhole cover lifting device.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A manhole cover lifting device, comprising:

[0011] Support frame, lifting rod, bearing components, and rotary drive components;

[0012] The support frame includes a support crossbar and support feet at both ends of the support crossbar. The support crossbar has a through mounting hole in the middle, through which the lifting rod passes. The lower end of the lifting rod has an abutment protrusion, and the outer circumference of the lifting rod has an external thread. The bearing is mounted on the support crossbar and sleeved on the outside of the lifting rod. The rotary drive is connected to the bearing to rotate with the bearing. The rotary drive has an internal thread that is threaded to the external thread, and the rotary drive has a rotary operating part.

[0013] In one embodiment, the rotary drive component includes a worm gear and a worm. An internal thread is formed on the inner circumference of the worm gear. The worm gear is connected to the bearing component. The worm meshes with the worm gear. A mounting seat for mounting the worm is provided on the support crossbar.

[0014] The worm gear is rotatably connected to the mounting base, and the rotating operating part is disposed on the worm gear.

[0015] In one embodiment, the rotating operating part is an external hexagonal nut disposed at one end of the worm gear.

[0016] In one embodiment, the end of the support crossbar is provided with a hinge seat, and the upper end of the support leg is hinged to the hinge seat via a pivot.

[0017] In one embodiment, the support foot is detachably connected to the support crossbar, and the upper end of the support foot is provided with a support seat that supports the outer wall of the support crossbar.

[0018] In one embodiment, the upper end of the lifting rod is provided with a directional protrusion, the protrusion direction of which is the same as the protrusion direction of the abutment protrusion.

[0019] In one embodiment, the lower end of the support foot is provided with an anti-slip sleeve.

[0020] In one embodiment, the support crossbar is also provided with a hand grip ring.

[0021] In one embodiment, the support frame and lifting rod are made of high manganese steel.

[0022] In one embodiment, a small gear is also provided on the worm gear, and a large gear is rotatably provided on the support crossbar. The small gear meshes with the large gear, and the large gear is provided with a rotating part.

[0023] As can be seen from the above settings, the manhole cover lifting device of this application has the following beneficial effects:

[0024] 1. Effortless operation: The tool-operated rotating part rotates the drive component, eliminating the need to rely on simple tools such as crowbars and chains to lift and tilt the manhole cover, thus reducing the risk of lower back strain.

[0025] 2. High safety: the manhole cover is not easy to slip during the lifting process, and it can be lifted slowly and steadily.

[0026] 3. High efficiency, no need for direct manual lifting, the lifting rod is lifted by rotating the rotary drive component and engaging the screw threads;

[0027] 4. The device is simple in design and easy for users to carry.

[0028] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the manhole cover lifting device in the embodiments of this application;

[0030] Figure 2 This is a partial cross-sectional structural diagram of the manhole cover lifting device in an embodiment of this application;

[0031] Figure 3 This is a structural schematic diagram of the manhole cover lifting device from above in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the supporting crossbar and supporting feet according to one embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Support crossbar; 11. Mounting hole; 12. Mounting seat; 13. Hinge seat; 14. Hand grip ring; 2. Support foot; 21. Support seat; 22. Anti-slip sleeve; 3. Lifting rod; 31. Abutment protrusion; 32. Pointing protrusion; 4. Bearing component; 5. Rotary drive component; 51. Worm gear; 52. Worm; 53. Rotary operating part; 61. Pinion; 62. Gear. Detailed Implementation

[0035] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this utility model.

[0037] Please see Figures 1 to 3 This embodiment provides a manhole cover lifting device, which includes: a support frame, a lifting rod 3, a bearing component 4, and a rotary drive component 5.

[0038] The support frame includes a support crossbar 1 and support feet 2 at both ends of the support crossbar 1. A through mounting hole 11 is provided in the middle of the support crossbar 1. A lifting rod 3 passes through the mounting hole 11. Abutment protrusion 31 is provided at the lower end of the lifting rod 3. External threads are provided on the outer periphery of the lifting rod 3. A bearing 4 is mounted on the support crossbar 1 and sleeved around the lifting rod 3. A rotary drive 5 is connected to the bearing 4 to rotate with it. The rotary drive 5 has an internal thread threaded to the external thread and a rotary operating part 53 is provided on the rotary drive 5. The bearing 4 allows for smoother rotation of the rotary drive 5, reducing the effort required for user operation. The bearing 4 is a thrust bearing.

[0039] In use, place the support frame next to the manhole cover, so that the support feet 2 support the outer sides of the manhole cover. Then, insert the lifting rod 3 into the perforation on the manhole cover and rotate the lifting rod 3 so that the abutment protrusion 31 successfully abuts against the inner wall of the manhole cover. Then, the rotating drive 5 can be rotated by turning the rotating operating part 53. At this time, due to the meshing of the internal and external threads, the rotation of the rotating drive 5 can continuously lift the lifting rod 3, thereby gradually lifting the manhole cover. Since existing manhole covers generally have perforations in two positions, two manhole cover lifting devices can be used to operate the two perforations respectively, so that the manhole cover is lifted stably and evenly, ensuring the safety of operation.

[0040] As can be seen from the above settings, the manhole cover lifting device of this application has the following beneficial effects:

[0041] 1. Effortless operation: The rotating operating part 53 can be operated with tools to rotate the rotating drive part 5, eliminating the need to rely on simple tools such as crowbars and chains to directly lift and tilt the manhole cover, thus reducing the risk of lower back strain.

[0042] 2. High safety: the manhole cover is not easy to slip during the lifting process, and it can be lifted slowly and steadily.

[0043] 3. High efficiency, no need for direct manual lifting, the lifting rod 3 is lifted by rotating the rotary drive 5 through the engagement of the thread;

[0044] 4. The device is simple in design and easy for users to carry.

[0045] In some embodiments, the rotary drive component 5 may be a nut. To make operation more convenient and labor-saving, preferably, in this embodiment, the rotary drive component 5 includes a worm gear 51 and a worm 52. The internal thread is provided on the inner circumference of the worm gear 51, the worm gear 51 is connected to the bearing component 4, the worm 52 meshes with the worm gear 51, the support crossbar 1 is provided with a mounting seat 12 for mounting the worm 52, the worm 52 is rotatably connected to the mounting seat 12, and the rotary operating part 53 is disposed on the worm 52.

[0046] By setting the worm gear 51 and worm 52, the user's operating direction is changed, allowing the user to operate more conveniently and easily from a horizontal direction, and making the operation less strenuous.

[0047] Preferably, the rotating operating part 53 is an external hexagonal nut disposed at one end of the worm 52, which allows the user to directly operate the rotation of the worm 52 with tools.

[0048] In some embodiments, a hinge seat 13 is provided at the end of the support crossbar 1, and the upper end of the support leg 2 is hinged to the hinge seat 13 via a pivot. Thus, the support leg 2 can be folded and stored within the support crossbar 1, reducing the overall volume and making it easier for users to carry. In use, the support leg 2 can be unfolded to support the ground.

[0049] In some implementations, such as Figure 4 As shown, the support leg 2 is detachably connected to the support crossbar 1. The upper end of the support leg 2 is provided with a support seat 21 that rests on the outer wall of the support crossbar 1. Therefore, the support leg 2 can be detached from the support crossbar 1, thereby reducing the overall size and making it easier for users to carry. In use, the support crossbar 1 can be placed on the support seat 21, ensuring stability between the support crossbar 1 and the support leg 2.

[0050] Preferably, the upper end of the lifting rod 3 is provided with a directional protrusion 32, the protrusion direction of the directional protrusion 32 being the same as the protrusion direction of the abutment protrusion 31. By providing the directional protrusion 32, the user can easily know the specific direction of the abutment protrusion 31 during operation, preventing situations where the abutment protrusion 31 cannot be abutted due to incorrect positioning.

[0051] Preferably, the lower end of the support foot 2 is provided with an anti-slip sleeve 22. This increases the friction during support and prevents slippage.

[0052] Preferably, the support crossbar 1 is also provided with a hand grip ring 14, which makes it convenient for the user to hold the hand grip ring 14 and thus lift the entire device to move.

[0053] Preferably, the support frame and lifting rod 3 are made of high manganese steel, which makes the components both hard and tough, suitable for lifting manhole covers.

[0054] To improve operational efficiency, preferably, the worm gear is further provided with a small gear 61, and the support crossbar 1 is rotatably provided with a large gear 62. The small gear 61 meshes with the large gear 62, and the large gear 62 is provided with a rotating part. The rotating part is an internal hexagonal hole. Thus, by rotating the large gear 62, the small gear 61 can be rotated, which in turn drives the worm gear 52 to rotate, thereby rapidly lifting the lifting rod 3 and thus rapidly lifting the manhole cover. However, by rotating the worm gear 52 alone, the lifting rod 3 can be lifted slowly, but the lifting force is greater, which is suitable for use with heavier manhole covers.

[0055] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A manhole cover lifting device, characterized in that, include: Support frame, lifting rod, bearing components, and rotary drive components; The support frame includes a support crossbar and support feet at both ends of the support crossbar. The support crossbar has a through mounting hole in the middle, through which the lifting rod passes. The lower end of the lifting rod has an abutment protrusion, and the outer circumference of the lifting rod has an external thread. The bearing is mounted on the support crossbar and sleeved on the outside of the lifting rod. The rotary drive is connected to the bearing to rotate with the bearing. The rotary drive has an internal thread that is threaded to the external thread, and the rotary drive has a rotary operating part.

2. The manhole cover lifting device according to claim 1, characterized in that: The rotary drive component includes a worm gear and a worm. The internal thread is provided on the inner circumference of the worm gear. The worm gear is connected to the bearing component. The worm meshes with the worm gear. The support crossbar is provided with a mounting seat for mounting the worm. The worm is rotatably connected to the mounting seat. The rotary operating part is provided on the worm.

3. The manhole cover lifting device according to claim 2, characterized in that: The rotating operating part is an external hexagonal nut located at one end of the worm gear.

4. The manhole cover lifting device according to claim 1, characterized in that: The end of the support crossbar is provided with a hinge seat, and the upper end of the support foot is hinged to the hinge seat through a pivot.

5. The manhole cover lifting device according to claim 1, characterized in that: The support leg is detachably connected to the support crossbar, and the upper end of the support leg is provided with a support seat that supports the outer wall of the support crossbar.

6. The manhole cover lifting device according to claim 1, characterized in that: The upper end of the lifting rod is provided with a directional protrusion, and the protrusion direction of the directional protrusion is the same as that of the abutment protrusion.

7. The manhole cover lifting device according to claim 1, characterized in that: The lower end of the support foot is provided with an anti-slip sleeve.

8. The manhole cover lifting device according to any one of claims 1-7, characterized in that: The support crossbar is also provided with a hand grip ring.

9. The manhole cover lifting device according to any one of claims 1-7, characterized in that: The support frame and lifting rod are made of high manganese steel.

10. The manhole cover lifting device according to claim 2, characterized in that: The worm gear is also provided with a small gear, and the support crossbar is rotatably provided with a large gear. The small gear meshes with the large gear, and the large gear is provided with a rotating part.

Images