Handheld lifting appliance nut mounting device suitable for narrow and small space

Abstract

The utility model provides a handheld lifting appliance nut mounting device suitable for a narrow space, which belongs to the technical field of bridge construction tools and comprises a bearing frame, a rotating tray and a supporting assembly. Lifting parts are arranged on the two sides of the bearing frame; the rotary tray is rotationally arranged at the upper part of the bearing frame, and is used for bearing the lifting appliance nut and rotating along with the lifting appliance nut; the supporting assembly is fixed to the lower portion of the bearing frame and used for supporting the bearing frame. According to the handheld lifting appliance nut mounting device suitable for the narrow and small space, the mounting stability of the lifting appliance nut can be guaranteed, the mounting precision and quality of the lifting appliance nut can be guaranteed, the lifting appliance nut can be mounted more efficiently and safely, and meanwhile the handheld lifting appliance nut mounting device is suitable for construction in more environments such as the narrow and small space.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction tooling technology, and more specifically, it relates to a handheld lifting tool nut installation device suitable for confined spaces. Background Technology

[0002] In the production process of post-tensioned prestressed concrete simply supported beams, the installation of the lifting nut is a crucial operation. Currently, the common method is to install it manually without any safety protection devices throughout the entire process.

[0003] Lifting nuts are typically quite heavy, requiring considerable effort from workers during manual installation. For example, when tightening the nut onto the corresponding bolt, workers may need to use both hands or simple tools to align and tighten it. If the hand slips or the direction of force is slightly off, the nut may slip from the worker's hand. Once loose, the nut will fall rapidly under its own weight. Due to its large mass, the impact force is significant. If workers below are performing other operations, such as inspecting the beam structure or moving small tools, they are easily injured by falling nuts. Such injuries can cause varying degrees of bodily harm, such as minor abrasions and bruises, or even serious injuries like fractures. Furthermore, the working environment at simply supported beam production sites is often complex. There may be various construction equipment, raw material piles, and multiple ongoing processes. This complex working environment restricts the worker's movement space when installing nuts and makes them susceptible to interference from the surrounding environment. Installing nuts in narrow passages or areas with dense equipment increases the likelihood of operational errors due to the worker's limited movement. Furthermore, the movement of other equipment or personnel in the vicinity may accidentally collide with the workers who are installing the nuts, further increasing the risk of the nuts falling and injuring them.

[0004] Furthermore, due to the weight of the nuts, during installation, workers not only need to exert considerable effort to lift them but also need to control the tightening force and direction. If the tightening force or direction deviates, the threads between the nut and bolt will be subjected to abnormal angle compression. This abnormal angle compression may deform the thread profile, such as flattening the tooth tips or wearing down the tooth sides. Additionally, if the nut is not aligned with the bolt center during installation and is forcibly tightened, it can also lead to excessive localized stress on the threads, resulting in thread damage. Utility Model Content

[0005] The purpose of this invention is to provide a handheld lifting nut installation device suitable for confined spaces, which can install lifting nuts more efficiently and safely, and is applicable to construction in confined spaces and other environments.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a handheld lifting tool nut installation device suitable for confined spaces, comprising:

[0007] A support frame, wherein the support frame has lifting parts on both sides;

[0008] A rotating pallet is rotatably mounted on the upper part of the support frame to support the lifting nut and rotate with it.

[0009] A support component is fixed to the lower part of the support frame and is used to support the support frame.

[0010] In one possible implementation, the supporting frame is made of aluminum alloy.

[0011] In one possible implementation, the supporting frame is a rectangular frame, which includes two long beams and two short beams arranged in parallel with each other. The two long beams and the two short beams are welded and fixed together, and the two short beams constitute the lifting part.

[0012] In one possible implementation, the long beam has a length of 620 mm and the short beam has a length of 240 mm.

[0013] In one possible implementation, the outer periphery of the rotating tray is provided with an upwardly extending flange.

[0014] In one possible implementation, the rotating tray is integrally formed with the flange.

[0015] In one possible implementation, the radius of the rotating tray is 140 mm.

[0016] In one possible implementation, the support assembly includes four rollers, which are arranged in pairs on both sides of the lower end face of the long beam.

[0017] In one possible implementation, the radius of the roller is 10 mm.

[0018] The advantages of this handheld lifting nut installation device for confined spaces are as follows: Compared with existing technologies, by moving the installation device to the location where the lifting nut needs to be installed in a confined space, and placing the lifting nut on a rotating tray after reaching the target position, the installation device is lifted by the supporting parts on both sides of the support frame so that the lifting nut is aligned with the lower end of the lifting rod. The operator drives the rotating tray to rotate manually or by other auxiliary means, and the rotating tray drives the lifting nut placed on it to rotate synchronously. During the rotation, the nut is gradually screwed into the corresponding bolt, realizing the installation operation. In confined spaces, this method of rotating the nut by the rotating tray avoids the problem that traditional tools may not be able to operate due to space limitations, making nut installation smoother. The handheld lifting nut installation device for confined spaces provided by this utility model can ensure the stability of the lifting nut installation, ensure the accuracy and quality of the lifting nut installation, and can carry out lifting nut installation more efficiently and safely, while being suitable for construction in confined spaces and other environments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A front view of a handheld lifting tool nut mounting device suitable for confined spaces provided by this utility model;

[0021] Figure 2 A top view of a handheld lifting tool nut mounting device suitable for confined spaces provided by this utility model;

[0022] Figure 3 This utility model provides a diagram illustrating the usage state of a handheld lifting tool nut installation device suitable for confined spaces.

[0023] In the diagram: 100, supporting frame; 110, long beam; 120, short beam; 200, rotating pallet; 210, side guard; 300, roller; 400, lifting nut. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0026] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is 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 construed as limiting the specific protection scope of the present invention.

[0027] Please see Figures 1 to 3 This invention provides a handheld lifting tool nut mounting device suitable for confined spaces. The device includes a support frame 100, a rotating tray 200, and a support assembly. The support frame 100 has lifting portions on both sides; the rotating tray 200 is rotatably mounted on the upper part of the support frame 100 to support the lifting tool nut 400 and rotate with it; the support assembly is fixed to the lower part of the support frame 100 to support the support frame 100.

[0028] This utility model provides a handheld lifting nut installation device suitable for confined spaces. Compared with existing technologies, this device is moved to the location where the lifting nut 400 needs to be installed in a confined space. After reaching the target location, the lifting nut 400 is placed on the rotating tray 200. The supporting parts on both sides of the supporting frame 100 lift the installation device so that the lifting nut 400 is aligned with the lower end of the lifting rod. The operator manually or through other auxiliary means drives the rotating tray 200 to rotate, which in turn drives the lifting nut 400 placed on it to rotate synchronously. During the rotation, the nut gradually screws into the corresponding bolt, completing the installation operation. In confined spaces, this method of rotating the nut by the rotating tray 200 avoids the problem that traditional tools may be unable to operate due to space limitations, making nut installation smoother. This utility model provides a handheld lifting nut installation device suitable for confined spaces, which can ensure the stability of the lifting nut 400 installation, ensure the accuracy and quality of the lifting nut 400 installation, and can perform the installation of the lifting nut 400 more efficiently and safely. It is also suitable for construction in more environments such as confined spaces.

[0029] Preferably, the support frame 100 is made of aluminum alloy. Aluminum alloy has a relatively low density and is lighter than traditional materials such as steel. This is crucial for handheld devices, preventing operator fatigue during prolonged use due to the device's weight and allowing for easier operation when installing the lifting nut 400 in confined spaces. Furthermore, while aluminum alloy is lightweight, proper alloying and heat treatment processes can impart high strength, sufficient to withstand various forces during the installation of the lifting nut 400, ensuring the reliability and stability of the device.

[0030] Specifically, the supporting frame 100 is a rectangular frame, comprising two long beams 110 and two short beams 120 arranged relatively parallel to each other. The two long beams 110 and two short beams 120 are welded together, and the two short beams 120 form the lifting part. This rectangular structure design makes the overall shape of the frame regular, facilitating processing, manufacturing, and assembly. In actual production, the two long beams 110 and two short beams 120 are firmly fixed together through welding, forming a stable overall structure. The rectangular frame shape has a natural advantage in confined spaces; its regular shape can better adapt to various narrow working environments without occupying excessive space. Operators can more easily bring the device close to the installation position of the lifting nut 400 for precise operation. Moreover, the relatively parallel arrangement of the long beams 110 and short beams 120 makes the frame's dimensions relatively stable in all directions, facilitating flexible adjustment of the device's position and orientation within limited space.

[0031] Specifically, the length of the long beam 110 is 620mm, and the length of the short beam 120 is 240mm.

[0032] In addition, the rotating pallet 200 has an upwardly extending flange 210 on its outer periphery, and the rotating pallet 200 and flange 210 are integrally formed. As a key component supporting the lifting nut 400, the rotating pallet 200 is typically circular or nearly circular in shape to accommodate the shape of most lifting nuts 400, ensuring the nut can be placed stably on it. It achieves its rotational function through a bearing connection with the support frame 100, allowing the nut to rotate during installation. The upwardly extending flange 210 on the outer periphery of the rotating pallet 200 starts from the edge of the rotating pallet 200 and extends upwards at a certain height in a direction perpendicular to the pallet plane. The shape of the flange 210 is typically ring-shaped, matching the outer periphery of the rotating pallet 200. The flange 210 effectively prevents the lifting nut 400 from slipping off the edge of the rotating pallet 200 during rotation due to unexpected situations (such as collisions or vibrations). Especially when operating in confined spaces, if the nut slips off, it may cause damage to surrounding equipment and personnel; the presence of the flange 210 greatly reduces this risk. The rotating tray 200 and the flange 210 are manufactured using a one-piece molding process, eliminating any gaps or weak points between them. This results in better structural strength and rigidity for the entire component. When bearing the weight of the nut and various forces generated during rotation, it can distribute stress more evenly, reducing the possibility of component damage due to excessive local stress and extending the component's service life.

[0033] Specifically, the radius of the rotating tray 200 is 140mm.

[0034] Specifically, the support assembly includes four rollers 300, which are arranged in pairs on both sides of the lower end face of the long beam 110, meaning there is one roller 300 on each of the left and right sides of the lower end face of each long beam 110. This distribution ensures that the four rollers 300 are evenly distributed at the bottom of the supporting frame 100 (rectangular frame), in contact with the ground or other supporting surfaces. The presence of the rollers 300 greatly improves the mobility of the device. In confined spaces, operators can easily push the entire handheld lifting nut 400 installation device to different working positions without having to lift or drag the device laboriously. This not only saves the operator's physical strength but also increases work efficiency, especially when the device position needs to be frequently adjusted, where the advantage is even more pronounced.

[0035] Specifically, the radius of roller 300 is 10mm.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hand-held spreader nut installation device suitable for use in tight spaces, characterized in that, The utility model relates to a lifting device for lifting device nut, including: Support frame (100), both sides of support frame (100) have the lifting part; Rotary tray (200), rotary tray (200) rotation is arranged in the upper portion of support frame (100), is used for supporting lifting device nut (400) and rotates with lifting device nut (400); Supporting assembly, supporting assembly is fixed in the lower portion of support frame (100), is used for supporting support frame (100).

2. A hand held sling nut mounting device for use in tight spaces as claimed in claim 1, wherein, Support frame (100) is aluminum alloy material.

3. A hand-held sling nut mounting device for use in tight spaces as claimed in claim 1, wherein, Support frame (100) is rectangular frame, rectangular frame includes two long beams (110) and two short beams (120) of relative parallel arrangement, two long beams (110) and two short beams (120) are welded fixed, and two short beams (120) constitute the lifting part.

4. A hand held sling nut mounting device for use in confined spaces as claimed in claim 3 wherein, The length of long beam (110) is 620mm, and the length of short beam (120) is 240mm.

5. A hand-held sling nut mounting device for use in tight spaces as defined in claim 1, wherein, The outer periphery of rotary tray (200) is provided with the fender (210) that extends upwards.

6. A hand held sling nut mounting device for use in confined spaces as claimed in claim 5 wherein, Rotary tray (200) is integrally formed with fender (210).

7. A hand-held sling nut mounting device for use in tight spaces as defined in claim 1, wherein, The radius of rotary tray (200) is 140mm.

8. A hand held sling nut mounting device for use in tight spaces as claimed in claim 3, wherein, The supporting assembly includes four rollers (300), and four rollers (300) are arranged on both sides of the lower end surface of long beam (110) in pairs.

9. A hand held sling nut mounting device for use in confined spaces as claimed in claim 8 wherein, The radius of roller (300) is 10mm.

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