A ditch cover hoisting device

Abstract

The utility model discloses a kind of ditch cover hoisting devices, including lever frame, handrail part, load wheel group, telescopic pull rod, hoisting arm and hoisting belt, lever frame is set on load wheel group, and can be the rotation center of load wheel group as fulcrum swing up and down, handrail part is located at the rear end of lever frame, one end of hoisting arm is hinged on lever frame, other end is suspended to the front upper side of lever frame, telescopic pull rod is hinged between lever frame and hoisting arm, hoisting belt is located at the other end of hoisting arm, for connecting ditch cover.This ditch cover hoisting device is good in adjustability, good in adaptability, good in labor-saving, convenient for keeping lifting hoisting object and moving.

Description

Technical Field

[0001] This utility model relates to the technical field of drainage ditch cover construction equipment, specifically to a ditch cover hoisting device. Background Technology

[0002] Drainage ditch covers are widely used in municipal roads, factory areas, warehouse areas, and other locations to cover drainage ditches, ensuring road passage and pedestrian safety. Drainage ditch covers are typically made of cast iron or concrete, and each piece is relatively heavy. Currently, the installation of drainage ditch covers on construction sites usually relies on manual handling or the assistance of hoisting machinery. Manual handling is not only inefficient but also prone to causing muscle injuries or workplace accidents for workers, resulting in high labor intensity and hindering continuous operation. Existing hoisting machinery is inconvenient to carry and complex to operate.

[0003] Chinese patent document with application number 202122470331.X discloses a manual lifting tool for trench covers, comprising: a moving assembly; a fulcrum fixing frame, the bottom end of which is hinged to the moving assembly; an operating rod having a connecting position fixed to the top of the fulcrum fixing frame, the distance between the connecting position and one end of the operating rod being greater than the distance between the connecting position and the other end of the operating rod; and at least one lifting assembly comprising: a connecting rope and two hooks, the middle of which is fixed to the other end of the operating rod, and the two hooks being fixed to the two ends of the connecting rope respectively; the hooks are used to hook onto opposite sides of the object to be lifted. This manual lifting tool utilizes the lever principle to lift trench covers and moves them above cable trenches via the moving assembly, thereby improving construction efficiency, saving labor costs, and reducing labor intensity. However, this manual lifting tool for trench covers still has the following shortcomings: 1) The lever, with the operating rod as the main body, is a fixed structure with poor adjustability and poor adaptability. For example, for heavy lifting objects, it is necessary to press down hard at the end where the handle is located in order to keep the lifting object and move it, which is not labor-saving. 2) No prying structure is provided. For plate-shaped trench covers, other prying components are needed to pry up the trench cover before it can be hooked up with a hook, which is a single function. 3) The rear is not equipped with outriggers, making it difficult to achieve long-term lifting and waiting. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a trench cover lifting device with good adjustability, good adaptability, good labor saving, and easy to hold and move the lifted object.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A trench cover hoisting device includes a lever frame, a handrail, a load-bearing wheel assembly, a telescopic rod, a hoisting arm, and a hoisting belt. The lever frame is mounted on the load-bearing wheel assembly and can swing up and down with the rotation center of the load-bearing wheel assembly as the fulcrum. The handrail is located at the rear end of the lever frame. One end of the hoisting arm is hinged to the lever frame, and the other end extends forward and upward from the lever frame. The telescopic rod is hinged between the lever frame and the hoisting arm. The hoisting belt is located at the other end of the hoisting arm and is used to connect the trench cover.

[0006] As a further improvement to the above technical solution: The lever frame is provided with a hinge seat behind the load-bearing wheel assembly, and the lifting arm is hinged to the hinge seat.

[0007] The middle part of the lifting arm protrudes upward.

[0008] The lifting arm includes a first straight rod segment and a second straight rod segment joined at an obtuse angle. The end of the first straight rod segment away from the second straight rod segment is hinged to a lever frame. The lifting belt is located at the end of the second straight rod segment away from the first straight rod segment. The middle part of the lifting arm is located at the joint of the first straight rod segment and the second straight rod segment.

[0009] The telescopic rod includes a first rod body, a second rod body, and a locking member. One end of the first rod body and the second rod body are movably connected, and the other end is respectively hinged to the lever frame and the lifting arm. The locking member is located between the first rod body and the second rod body and is used to lock the first rod body and the second rod body.

[0010] The first rod has a plurality of lock holes spaced apart along its length, and the locking element is provided on the second rod and inserted into any of the lock holes.

[0011] The locking element is a locking pin or a locking bolt.

[0012] The front end of the lever frame extends to the front of the load-bearing wheel assembly and is equipped with a skid plate, which is located at the rear and lower end of the other end of the lifting arm.

[0013] The lifting arm is provided with lifting holes, and the lifting belt is suspended on the lifting holes.

[0014] The lever frame is equipped with auxiliary support legs behind the load-bearing wheel assembly.

[0015] Compared with the prior art, the advantages of this utility model are: In use, the trench cover hoisting device of this utility model is first adjusted by extending and retracting the telescopic rod to adjust the lever arm length between the other end of the hoisting arm and the fulcrum; then, the trench cover is connected by the hoisting strap, and the handrail is pressed down to lift the trench cover; next, the trench cover hoisting device is pushed to transport the trench cover to the top of the drainage ditch; finally, the downward pressure on the handrail is slowly released to allow the trench cover to fall onto the drainage ditch, and then the connection between the hoisting strap and the trench cover is released. Because the lifting arm is hinged to the lever frame and its angle relative to the lever frame can be adjusted by the extension and retraction of the telescopic rod, the lever arm length between the other end of the lifting arm and the fulcrum can be adjusted. This provides good adjustability and adaptability, especially for heavier trench covers. On the one hand, the lever arm length between the other end of the lifting arm and the fulcrum can be much smaller than the lever arm length between the handrail and the fulcrum, achieving a good labor-saving effect. On the other hand, because the end of the lifting arm away from the handrail extends forward and upward towards the lever frame, the lifting trench cover can be positioned directly above the load-bearing wheel assembly by pressing down on the handrail. In this way, a very small amount of force is required to hold the lifted trench cover, making it easy to hold and move the trench cover. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the trench cover hoisting device of this utility model.

[0017] The labels in the diagram represent: 1. Lever frame; 11. Hinge seat; 2. Handrail; 3. Load-bearing wheel assembly; 4. Telescopic tie rod; 41. First rod body; 411. Locking hole; 42. Second rod body; 43. Locking element; 5. Lifting arm; 51. First straight rod section; 52. Second straight rod section; 53. Lifting hole; 6. Lifting strap; 7. Trench cover; 8. Skid plate; 9. Auxiliary outriggers. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Figure 1 This invention illustrates an embodiment of the trench cover hoisting device. The trench cover hoisting device of this embodiment includes a lever frame 1, a handrail 2, a load-bearing wheel assembly 3, a telescopic rod 4, a hoisting arm 5, and a hoisting belt 6. The lever frame 1 is mounted on the load-bearing wheel assembly 3 and can swing up and down with the rotation center of the load-bearing wheel assembly 3 as the fulcrum. The handrail 2 is located at the rear end of the lever frame 1. One end of the hoisting arm 5 is hinged to the lever frame 1, and the other end extends forward and upward from the lever frame 1. The telescopic rod 4 is hinged between the lever frame 1 and the hoisting arm 5. The hoisting belt 6 is located at the other end of the hoisting arm 5 and is used to connect the trench cover 7.

[0023] In use, firstly, adjust the lever arm length between the other end of the lifting arm 5 and the fulcrum by extending and retracting the telescopic rod 4; then, connect the trench cover 7 with the lifting strap 6 and press down the handrail 2 to lift the trench cover 7 with the lifting strap 6; then, push the trench cover lifting device to transport the trench cover 7 to the top of the drainage ditch; finally, slowly release the downward pressure on the handrail 2 to lower the trench cover 7 to cover the drainage ditch, and then disconnect the lifting strap 6 from the trench cover 7. Since the lifting arm 5 is hinged to the lever frame 1 and its angle relative to the lever frame 1 can be adjusted by the telescopic action of the telescopic rod 4, the lever arm length between the other end of the lifting arm 5 and the fulcrum can be adjusted. It has good adjustability and adaptability. Especially for the heavier trench cover 7, on the one hand, the lever arm length between the other end of the lifting arm 5 and the fulcrum can be much smaller than the lever arm length between the handrail 2 and the fulcrum, achieving a good labor-saving effect. On the other hand, since the end of the lifting arm 5 away from the handrail 2 extends forward and upward towards the lever frame 1, the lifting trench cover 7 can be positioned directly above the load-bearing wheel group 3 by pressing down on the handrail 2. In this way, a very small amount of force is required to hold the lifting trench cover 7, which makes it easy to hold the lifting trench cover 7 and move it.

[0024] Furthermore, in this embodiment, the lever frame 1 is provided with a hinge seat 11 behind the load-bearing wheel assembly 3, and the lifting arm 5 is hinged to the hinge seat 11. In this way, a lifting space can be formed in front of the load-bearing wheel assembly 3 and below the lifting arm 5, which is conducive to lifting the trench cover 7 and also to lifting the trench cover 7 directly above the load-bearing wheel assembly 3.

[0025] Furthermore, in this embodiment, the middle part of the lifting arm 5 protrudes upward to avoid collision with the trench cover plate 7 after it has been lifted.

[0026] Furthermore, in this embodiment, the lifting arm 5 includes a first straight rod segment 51 and a second straight rod segment 52 joined at an obtuse angle. The end of the first straight rod segment 51 away from the second straight rod segment 52 (front end) is hinged to the lever frame 1. The lifting belt 6 is located at the end of the second straight rod segment 52 away from the first straight rod segment 51 (rear end). The middle part of the lifting arm 5 is located at the joint of the first straight rod segment 51 and the second straight rod segment 52.

[0027] Further, in this embodiment, the telescopic rod 4 includes a first rod 41, a second rod 42, and a locking member 43. One end of the first rod 41 and the second rod 42 are movably connected, and the other end is respectively hinged to the lever frame 1 and the lifting arm 5. The locking member 43 is disposed between the first rod 41 and the second rod 42 for locking the first rod 41 and the second rod 42. One end of the first rod 41 and one end of the second rod 42 are movably connected, the other end of the first rod 41 is hinged to the lever frame 1, and the other end of the second rod 42 is hinged to the lifting arm 5. The movable connection of the first rod 41 and the second rod 42 allows for telescopic adjustment of the total length. The locking member 43 is used to lock the first rod 41 and the second rod 42 to lock the total length of the telescopic rod 4. Preferably, the other end of the second rod 42 is hinged to the middle of the first straight rod segment 51, and the other end of the first rod 41 is hinged to the lever frame 1 behind the load-bearing wheel assembly 3.

[0028] Furthermore, in this embodiment, the first rod 41 is provided with a plurality of locking holes 411 arranged at intervals along its length, and the locking member 43 is provided on the second rod 42 and inserted into any of the locking holes 411. Preferably, the locking member 43 is a locking pin or a locking bolt. Specifically, the second rod 42 is a sleeve, the first rod 41 is movably inserted into the second rod 42, and the locking member 43 is provided at the end of the second rod 42 facing the first rod 41.

[0029] Furthermore, in this embodiment, the front end of the lever frame 1 extends to the front of the load-bearing wheel assembly 3 and is provided with a pry plate 8, which is located at the rear and lower end of the other end of the lifting arm 5. In this way, before lifting the trench cover 7, the trench cover 7 can be pried up by inserting the pry plate 8 under the trench cover 7 and by pressing down the handrail 2. This facilitates the connection of the lifting strap 6 to the trench cover 7 and increases its usability.

[0030] Furthermore, in this embodiment, the lifting arm 5 is provided with a lifting hole 53, and the lifting belt 6 is suspended on the lifting hole 53.

[0031] Furthermore, in this embodiment, the lever frame 1 is provided with an auxiliary support leg 9 behind the load-bearing wheel assembly 3. In this way, when a long lifting wait is required, the handrail 2 can be pressed down to support the auxiliary support leg 9 on the ground. At this time, one can sit on the handrail 2 to hold the lifting trench cover 7, or hang a counterweight on the handrail 2 to maintain the trench cover 7 in the lifting state, thus making it easy to achieve long lifting waits.

[0032] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A trench cover hoisting device, characterized in that: It includes a lever frame (1), a handrail (2), a load-bearing wheel assembly (3), a telescopic rod (4), a lifting arm (5), and a lifting belt (6). The lever frame (1) is mounted on the load-bearing wheel assembly (3) and can swing up and down with the rotation center of the load-bearing wheel assembly (3) as the fulcrum. The handrail (2) is located at the rear end of the lever frame (1). One end of the lifting arm (5) is hinged to the lever frame (1), and the other end extends forward and upward toward the lever frame (1). The telescopic rod (4) is hinged between the lever frame (1) and the lifting arm (5). The lifting belt (6) is located at the other end of the lifting arm (5) and is used to connect the trench cover plate (7).

2. The trench cover hoisting device according to claim 1, characterized in that: The lever frame (1) has a hinge seat (11) behind the load-bearing wheel assembly (3), and the lifting arm (5) is hinged to the hinge seat (11).

3. The trench cover hoisting device according to claim 1, characterized in that: The middle part of the lifting arm (5) protrudes upward.

4. The trench cover hoisting device according to claim 3, characterized in that: The lifting arm (5) includes a first straight rod segment (51) and a second straight rod segment (52) joined at an obtuse angle. The end of the first straight rod segment (51) away from the second straight rod segment (52) is hinged to the lever frame (1). The lifting belt (6) is located at the end of the second straight rod segment (52) away from the first straight rod segment (51). The middle part of the lifting arm (5) is located at the joint of the first straight rod segment (51) and the second straight rod segment (52).

5. The trench cover hoisting device according to claim 1, characterized in that: The telescopic rod (4) includes a first rod body (41), a second rod body (42), and a locking member (43). One end of the first rod body (41) and the second rod body (42) are movably connected, and the other end is hinged to the lever frame (1) and the lifting arm (5) respectively. The locking member (43) is located between the first rod body (41) and the second rod body (42) and is used to lock the first rod body (41) and the second rod body (42).

6. The trench cover hoisting device according to claim 5, characterized in that: The first rod (41) is provided with a plurality of lock holes (411) arranged at intervals along the length direction, and the locking member (43) is provided on the second rod (42) and inserted into any lock hole (411).

7. The trench cover hoisting device according to claim 6, characterized in that: The locking element (43) is a locking pin or a locking bolt.

8. The trench cover hoisting device according to any one of claims 1 to 7, characterized in that: The front end of the lever frame (1) extends to the front of the load-bearing wheel assembly (3) and is provided with a pry plate (8), which is located at the rear and lower end of the other end of the lifting arm (5).

9. The trench cover hoisting device according to any one of claims 1 to 7, characterized in that: The lifting arm (5) is provided with a lifting hole (53), and the lifting belt (6) is suspended on the lifting hole (53).

10. The trench cover hoisting device according to any one of claims 1 to 7, characterized in that: The lever frame (1) is provided with auxiliary support legs (9) behind the load-bearing wheel assembly (3).

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