Structure of hook for opening well lid

Abstract

The utility model discloses a structure of a hook for opening a well lid, which comprises a bottom plate and a sliding plate slidably mounted in the bottom plate, one end of the sliding plate penetrates to the outside of the bottom plate, supporting plates are fixed on one side of the top end of the bottom plate and one side of the top end of the sliding plate, and lifting arms are hinged to the top ends of the supporting plates. A pedal plate is hinged between the opposite outer walls of the two lifting arms, a chain connecting structure is installed at the end, away from the pedal plate, of each lifting arm, and a lock hook used for being tightly hooked with a well lid through hole is installed at the bottom end of each chain connecting structure. By means of the structural design of the lever principle between the supporting plate and the lifting arm, a small amount of pedaling force can be converted into enough lifting force, and therefore even a large or heavy well lid can be lifted and moved easily.

Description

Technical Field

[0001] The utility model relates to the technical field of hooks, in particular to a structure of a hook used for opening a manhole cover. Background Art

[0002] A manhole cover hook is a sophisticated tool used to conveniently and safely open and close manhole covers above ground. Its main components include a handle, hook, and connecting rod. The handle is typically made of durable materials and ergonomically designed to ensure the operator maintains a secure grip on the hook. The hook is the core component of the hook, its shape and strength enabling it to effectively grasp and lift various manhole covers. The connecting rod plays a key role in transmitting operating force, ensuring the hook's stability and durability during operation. For example, a hook for opening a manhole cover disclosed in the authorization announcement number CN205087893U includes a pull rod and a hook sleeve, wherein the hook sleeve is provided with a through hole, and the hook sleeve is movably connected to the pull rod through the through hole, and the pull rod can move up and down relative to the hook sleeve, and a plurality of equally spaced incisions are provided at the opening of the lower end of the hook sleeve, each of which is provided with a hook head and is connected and fixed by a connecting ring, and a support block for propping up the hook head is provided at the end of the pull rod; a connecting rope is provided at the upper end of the pull rod; the support block is spherical or conical, and the maximum diameter of the sphere or cone is larger than the diameter of the through hole of the hook sleeve, so that the manhole cover is pulled up and will not be broken or hit by the feet due to poor hooking. However, this technical solution still requires the use of the user's own arm strength to open the manhole cover during use. For larger or older manhole covers, more strength and time are required to complete the movement, which requires the user to expend a lot of physical strength during use, especially when using frequently or facing multiple manhole covers, which is more likely to cause fatigue and reduced work efficiency. Summary of the Invention

[0003] The purpose of the present utility model is to provide a hook structure for opening a manhole cover, which utilizes a support plate and a lifting arm in a lever structure to tilt and lift a chain connection structure, a lock hook and a connected manhole cover, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a structure of a hook for opening a manhole cover, comprising a base plate and a slide plate slidably installed inside the base plate, one end of the slide plate extends to the outside of the base plate, a support plate is fixed to one side of the base plate and the top of the slide plate, and a lifting arm is hinged to the top of the support plate, a foot pedal is hinged between the relative outer walls of the two lifting arms, a chain connection structure is installed at the end of the lifting arm away from the foot pedal, and a locking hook for hooking with the through hole of the manhole cover is installed at the bottom end of the chain connection structure.

[0005] Preferably, the lifting arm and the foot pedal are both made of aluminum alloy.

[0006] Preferably, a longitudinal axis is fixed between the opposite outer walls of the two lifting arms, and the foot pedal is sleeved on the longitudinal axis.

[0007] Preferably, rectangular rails are fixed on both sides of the bottom of the base plate, and the lower surface of the slide plate is provided with rectangular through grooves for sliding connection of the rectangular rails.

[0008] Preferably, the chain connection structure includes an H-shaped joint hingedly installed at one end of the lifting arm, and an upper horizontal axis fixed at one end inside the H-shaped joint, and a chain monomer is installed on the surface of the upper horizontal axis, and the bottom end of the chain monomer is connected to the top end of the lock hook through a connecting piece.

[0009] Preferably, the connecting member includes a lower horizontal shaft installed at the bottom end of the chain monomer, and a U-shaped head installed at the end of the lower horizontal shaft, and the bottom end of the U-shaped head is threadedly connected to the top end of the lock hook.

[0010] Compared to existing technologies, the present invention offers the following advantages: The structure of the manhole cover opening hook, which incorporates a support plate and a foot pedal, utilizes the lever mechanism between the support plate and the lifting arm to convert a small amount of pedaling force into sufficient lifting force, allowing even large or heavy manhole covers to be easily lifted and moved. Compared to traditional manual manhole cover hooks, this design significantly reduces the physical effort required by the operator, improving work efficiency while also alleviating the operator's physical burden. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model Figure 3 .

[0015] In the figure: 1. Base plate; 2. Slide plate; 3. Support plate; 4. Lifting arm; 5. Foot pedal; 6. Chain connection structure; 601. H-type joint; 602. Upper horizontal axis; 603. Chain unit; 604. Lower horizontal axis; 605. U-head; 7. Lock hook. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-4 The utility model provides an embodiment: a structure of a hook for opening a manhole cover, comprising a base plate 1 and a slide plate 2 slidably mounted inside the base plate 1, one end of the slide plate 2 extending to the outside of the base plate 1, a support plate 3 fixed to one side of the top of each of the base plate 1 and the slide plate 2, and a lifting arm 4 hinged to the top of the support plate 3, a foot pedal 5 hinged between the opposite outer walls of the two lifting arms 4, a longitudinal axis fixed between the opposite outer walls of the two lifting arms 4, and the foot pedal 5 sleeved on the longitudinal axis;

[0018] A chain connection structure 6 is installed at one end of the lifting arm 4 away from the foot pedal 5, and a lock hook 7 for hooking with the through hole of the manhole cover is installed at the bottom end of the chain connection structure 6;

[0019] The lifting arm 4 and the foot pedal 5 are both made of aluminum alloy. In the manhole cover hook, the lifting arm 4 and the foot pedal 5 are made of aluminum alloy, which effectively reduces the overall weight, making it lighter and more convenient for operators to move and carry; and has excellent strength and stability, and can withstand the force and pressure generated during the operation of the manhole cover hook;

[0020] Rectangular tracks are fixed on both sides of the bottom of the base plate 1, and a rectangular through groove for sliding connection of the rectangular tracks is provided on the lower surface of the slide plate 2. The staff can manually slide the slide plate 2 so that the slide plate 2 slides relatively inside the base plate 1, thereby adjusting the relative length between the base plate 1 and the slide plate 2 until the two chain connection structures 6 and the lock hook 7 can be suspended above the through hole of the manhole cover to ensure that the chain connection structure 6 and the lock hook 7 are compatible with the position of the through hole of the manhole cover, which can relatively easily adapt to manhole covers of different types and sizes;

[0021] The chain connection structure 6 includes an H-shaped joint 601 hingedly mounted at one end of the lifting arm 4, and an upper horizontal shaft 602 fixed at one end inside the H-shaped joint 601. A chain monomer 603 is mounted on the surface of the upper horizontal shaft 602. The bottom end of the chain monomer 603 is connected to the top end of the locking hook 7 through a connecting piece. The connecting piece includes a lower horizontal shaft 604 mounted at the bottom end of the chain monomer 603, and a U-shaped head 605 mounted at the end of the lower horizontal shaft 604. The bottom end of the U-shaped head 605 is threadedly connected to the top end of the locking hook 7. When the chain connection structure 6 and the locking hook 7 are connected to the through-hole of the manhole cover, the H-shaped joint 601 can cause the end of the lifting arm 4 to swing relative to each other, and the angle of the chain monomer 603 itself can change, so that the locking hook 7 can adapt to the flipping action of the manhole cover during the process of pulling up the manhole cover, thereby adjusting the lifting speed and height of the manhole cover by controlling the pedal force, providing more precise force control;

[0022] The foot-operated mode is relatively intuitive and simple, making it easier for operators to master the correct usage techniques, thus reducing the risk of operational errors caused by human errors.

[0023] When using the embodiment of the present application, a worker first moves the structure to the location where the manhole cover is to be opened and places the base plate 1 and the slide plate 2 on the ground. The worker then adjusts the chain connection structure 6 and hooks the lock hook 7 to the through hole of the manhole cover, ensuring that the lock hook 7 is tightly hooked with the through hole. The worker then steps on the foot pedal 5 and applies downward force, causing the lifting arm 4, which has the chain connection structure 6 and the lock hook 7, to tilt upward, thereby pulling the manhole cover upward and achieving the purpose of opening the manhole cover. The structural design using the lever principle between the support plate 3 and the lifting arm 4 can convert a small amount of pedaling force into sufficient lifting force, so that even large or heavy manhole covers can be easily lifted and moved. Compared with traditional manual manhole cover hooks, this design can greatly reduce the physical effort required by the operator, improve work efficiency, and reduce the physical burden on the operator. Moreover, because the operator can stand firmly on the ground with both feet and apply force through the foot pedal 5, rather than having to bend over or stand in an unstable posture to operate, this can also reduce accidental injuries caused by improper operating posture or imbalance.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A hook structure for opening a manhole cover, characterized in that: The utility model comprises a base plate (1) and a slide plate (2) slidably mounted inside the base plate (1), one end of the slide plate (2) extends to the outside of the base plate (1), a support plate (3) is fixed to one side of the top of each of the base plate (1) and the slide plate (2), and a lifting arm (4) is hinged to the top of the support plate (3), a foot pedal (5) is hinged between the opposite outer walls of the two lifting arms (4), a chain connection structure (6) is mounted on one end of the lifting arm (4) away from the foot pedal (5), and a lock hook (7) for hooking with the through hole of the manhole cover is mounted on the bottom end of the chain connection structure (6).

2. The structure of a hook for opening a manhole cover according to claim 1, characterized in that: The lifting arm (4) and the foot pedal (5) are both made of aluminum alloy components.

3. The structure of a hook for opening a manhole cover according to claim 1, characterized in that: A longitudinal axis is fixed between the opposite outer walls of the two lifting arms (4), and the foot pedal (5) is sleeved on the longitudinal axis.

4. The structure of a hook for opening a manhole cover according to claim 1, characterized in that: Rectangular rails are fixed on both sides of the bottom of the base plate (1), and a rectangular through groove for sliding connection of the rectangular rails is provided on the lower surface of the slide plate (2).

5. The structure of a hook for opening a manhole cover according to claim 1, characterized in that: The chain connection structure (6) comprises an H-shaped joint (601) hingedly mounted on one end of the lifting arm (4), and an upper transverse shaft (602) fixed at one end inside the H-shaped joint (601), a chain monomer (603) being mounted on the surface of the upper transverse shaft (602), and the bottom end of the chain monomer (603) being connected to the top end of the lock hook (7) via a connecting piece.

6. The structure of a hook for opening a manhole cover according to claim 5, characterized in that: The connecting member comprises a lower transverse shaft (604) mounted on the bottom end of the chain monomer (603), and a U-shaped head (605) mounted on the end of the lower transverse shaft (604), wherein the bottom end of the U-shaped head (605) is threadedly connected to the top end of the lock hook (7).

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