Electric hoist lifting bracket
By introducing an adjustable frame and limiting structure into the lifting bracket of the electric hoist, the problem that existing lifting devices cannot adapt to workpieces of different sizes has been solved, achieving wider applicability and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG WODA LIFTING MASCH CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-19
AI Technical Summary
The existing electric hoist lifting devices have a fixed hook distance, which cannot be adapted to workpieces of different sizes, resulting in poor practicality.
An electric hoist lifting bracket was designed. By fitting adjustable frames and connecting shafts at both ends of the crossbeam, combined with a limiting structure, the hook distance can be adjusted to meet the lifting needs of workpieces of different sizes.
It achieves wide applicability to workpieces of different sizes, improves practicality and safety, and is easy to operate.
Smart Images
Figure CN224377425U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical technology and relates to an electric hoist, and more particularly to an electric hoist lifting support. Background Technology
[0002] An electric hoist is a lifting device installed on overhead cranes and gantry cranes. Electric hoists are characterized by their small size, light weight, simple operation, and ease of use.
[0003] The lifting device is an important accessory of the electric hoist. Its structure is as disclosed in the Chinese Patent Database as a new type of unloading hopper lifting device (application number: 201220564403.5). It includes a base frame, which includes a crossbar and a hook fixing part fixed on the crossbar. Hooks are symmetrically arranged at the lower ends of both ends of the crossbar. The hooks are equipped with anti-return pins. Steel wire ropes of equal length are fixed on the front and rear sides of both ends of the crossbar. The ends of the steel wire ropes are respectively fixed with rings.
[0004] In the above-mentioned lifting device, the distance between the two hooks is fixed, which means that the lifting device can only be used for workpieces of a certain size range, resulting in poor practicality. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a widely applicable electric hoist lifting support.
[0006] The purpose of this utility model can be achieved through the following technical solution: an electric hoist lifting bracket, including a crossbeam and two hooks, a connecting block is formed on the top wall of the middle part of the crossbeam, and a hanging hole is horizontally penetrating the connecting block. The feature is that both ends of the crossbeam are fitted with U-shaped frames that match the crossbeam, and the two hooks are respectively installed in the middle of the two frames. A connecting shaft is horizontally fixed between the two ends of the frames. At least one row of positioning notches matching the connecting shaft is formed on the top wall of both ends of the crossbeam. The positioning notches are arranged through the width direction of the crossbeam, and multiple positioning notches in the same row are evenly distributed along the length direction of the crossbeam. The lower side of the two connecting shafts is inserted into one of the positioning notches. The crossbeam is also provided with two limiting structures that can be released to restrict the upward movement distance of the two frames. Under the action of the limiting structures, the lower side of the connecting shaft is always in the corresponding positioning notch.
[0007] Before use, the electric hoist hooks are hung on the hanging holes. When using, first adjust the distance between the two hooks according to the size of the workpiece to be lifted. The specific adjustment method is as follows: First, insert the connecting shaft into the appropriate positioning notch to adjust the distance between the two frames. Then, install the limiting structure to restrict the upward movement of the frames to prevent the connecting shaft from coming out of the corresponding positioning notch, thereby completing the adjustment of the position of the two hooks. Then, hang the workpiece on the hooks and drive the workpiece to be lifted by the action of the electric hoist.
[0008] With the cooperation of the connecting shaft and the positioning notch, the distance between the two hooks can be adjusted, thus better adapting to workpieces of different sizes to be lifted, making it more widely applicable and practical.
[0009] In the aforementioned electric hoist lifting bracket, a horizontal positioning shaft is also installed within the frame body. The two ends of the positioning shaft are respectively fixed to the two ends of the corresponding frame body, and the two positioning shafts are positioned above the two connecting shafts. The positioning shafts are installed to form a rectangular ring structure between the positioning shafts and the frame body, resulting in a more stable structure, better support for the hook, and improved safety.
[0010] In the aforementioned electric hoist lifting bracket, the limiting structure includes a locking component and a limiting shaft horizontally positioned above the crossbeam. The limiting shaft is slidably mounted on the crossbeam along its length, and its position can be adjusted by sliding it to be directly above or offset from the corresponding connecting shaft. The locking component is used to releasably restrict the corresponding limiting shaft to the sliding position. Using the sliding limiting shaft to restrict or release the upward movement of the bracket offers advantages such as ease of use.
[0011] In the above-mentioned electric hoist lifting bracket, both ends of the crossbeam have two protrusions distributed along the length of the crossbeam. Each protrusion has a through hole for the corresponding limiting shaft to pass through, and the through hole and the corresponding limiting shaft form a sliding fit, which has the advantages of simple structure and stable operation.
[0012] In the aforementioned electric hoist lifting bracket, one of the two protrusions located at the same end of the crossbeam has a vertically protruding threaded hole at its top, which connects to a corresponding through hole. The locking component is a screw screwed into the threaded hole. The limiting shaft has a corresponding threaded hole for the screw shank to be screwed into. By screwing in or out the screw, the limiting shaft can be locked or unlocked, making operation quite convenient.
[0013] As another option, in the above-mentioned electric hoist lifting bracket, the locking component is two nuts screwed to both ends of the limiting shaft, and the two nuts respectively press against the opposite side walls of the two corresponding protrusions.
[0014] In the aforementioned electric hoist lifting bracket, a limiting channel is formed between the connecting shaft and the positioning shaft corresponding to the position, and the limiting shaft passes through the corresponding limiting channel.
[0015] Compared with existing technologies, this electric hoist lifting bracket has the following advantages:
[0016] 1. With the cooperation of the connecting shaft and the positioning notch, the distance between the two hooks can be adjusted, so as to better adapt to the workpieces to be lifted of different sizes, with a wider range of applications and good practicality.
[0017] 2. The upward movement of the frame is limited or released by sliding limit shaft, which has the advantages of being easy to use. Attached Figure Description
[0018] Figure 1 This is a 3D schematic diagram of the lifting support of the electric hoist.
[0019] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.
[0020] Figure 3 This is a diagram showing the installation of the locking mechanism.
[0021] In the diagram, 1 is a crossbeam; 1a is a connecting block; 1b is a hanging hole; 1c is a positioning notch; 1d is the main body; 1e is a strip block; 1f is a protrusion; 2 is a hook; 3 is a frame; 4 is a connecting shaft; 5 is a positioning shaft; 6 is a locking component; 7 is a limiting shaft; 7a is a threaded hole; and 8 is a limiting channel. Detailed Implementation
[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0023] Example 1: The lifting bracket of this electric hoist includes a crossbeam 1 and two hooks 2. A connecting block 1a is vertically formed on the top wall of the middle part of the crossbeam 1. A hanging hole 1b is horizontally penetrating the connecting block 1a. The axis of the hanging hole 1b extends along the width direction of the crossbeam 1 and is used to hang the crossbeam 1.
[0024] Specifically
[0025] Both ends of the crossbeam 1 are fitted with U-shaped frame bodies 3 that match the crossbeam 1. At this time, both ends of the frame bodies 3 are close to or in contact with the two long sides of the crossbeam 1. Preferably, both ends of the frame bodies 3 are in contact with the two long sides of the crossbeam 1. Two hooks 2 are respectively installed in the middle of the two frame bodies 3. There are various types of hooks 2, and different hooks 2 have various installation methods. In this embodiment, the hook 2 is an open ring shape. The middle of the frame body 3 extends into the opening, and the two ends of the hook 2 press against both sides of the middle of the frame body 3. The middle of the frame body 3 and the two ends of the hook 2 are connected in series by bolts.
[0026] like Figure 1 As shown, a connecting shaft 4 is horizontally fixed between the two ends of the frame 3, meaning that the two ends of the connecting shaft 4 are respectively fixed to the two ends of the frame 3. At least one row of positioning notches 1c matching the connecting shaft 4 is formed on the top wall of both ends of the crossbeam 1. The positioning notches 1c are arranged through the width direction of the crossbeam 1, and multiple positioning notches 1c in the same row are evenly distributed along the length direction of the crossbeam 1. The lower sides of both connecting shafts 4 are inserted into one of the positioning notches 1c. The crossbeam 1 is also provided with two limiting structures that can be released to restrict the upward movement distance of the two frames 3. Under the action of the limiting structures, the lower side of the connecting shaft 4 is always in the corresponding positioning notch 1c.
[0027] Before use, the electric hoist hook is hung on the hanging hole 1b. When using, first adjust the distance between the two hooks 2 according to the size of the workpiece to be lifted. The specific adjustment method is as follows: First, insert the connecting shaft 4 into the appropriate positioning notch 1c to adjust the distance between the two frames 3. Then, install the limiting structure to restrict the frame 3 from moving upward, so as to prevent the connecting shaft 4 from coming out of the corresponding positioning notch 1c, thereby completing the adjustment of the position of the two hooks 2. Then, hang the workpiece on the hook 2 and drive the workpiece to be lifted by the action of the electric hoist.
[0028] With the cooperation of connecting shaft 4 and positioning notch 1c, the distance between the two hooks 2 can be adjusted, thereby better adapting to workpieces of different sizes to be lifted, with a wider range of applications and good practicality.
[0029] To further explain, a horizontal positioning shaft 5 is also provided inside the frame 3. The two ends of the positioning shaft 5 are respectively fixed to the two ends of the corresponding frame 3, and the two positioning shafts 5 are respectively located above the two connecting shafts 4. The positioning shafts 5 are set so that a rectangular ring structure is formed between the positioning shafts 5 and the frame 3, which makes the structure more stable, thereby better supporting the hook 2 and improving safety.
[0030] In this embodiment,
[0031] The crossbeam 1 includes a main body 1d with an I-shaped cross-section. Vertical strip blocks 1e are formed on the top walls of both ends of the main body 1d. The length of each strip block 1e extends along the length direction of the main body 1d, and the aforementioned positioning notches 1c are provided on the strip blocks 1e. Preferably, two strip blocks 1e are provided on each end of the main body 1d. The two strip blocks 1e at the same end are spaced apart along the width direction of the main body 1d, and each strip block 1e has a row of the aforementioned positioning notches 1c. In this case, two rows of positioning notches 1c are formed on the top walls of both ends of the crossbeam 1, and the two rows of positioning notches 1c at the same end are distributed along the width direction of the crossbeam 1, thereby enhancing the support effect on the connecting shaft 4.
[0032] like Figures 1 to 3 As shown, the limiting structure includes a locking element 6 and a limiting shaft 7 horizontally positioned above the crossbeam 1. The limiting shaft 7 is slidably mounted on the crossbeam 1 along its length. By sliding the limiting shaft 7, it can be positioned directly above or offset from the corresponding connecting shaft 4. The locking element 6 is used to releasably limit the corresponding limiting shaft 7 to the sliding position. Limiting or releasing the upward movement of the frame 3 by sliding the limiting shaft 7 offers advantages such as ease of use. Further explanation: a limiting channel 8 is formed between the corresponding connecting shaft 4 and the corresponding positioning shaft 5. The height of the limiting channel 8 is slightly larger than the outer diameter of the limiting shaft 7. The limiting shaft 7 passes through the corresponding limiting channel 8, and neither of the limiting shafts 7 contacts the corresponding connecting shaft 4 nor the corresponding positioning shaft 5.
[0033] in,
[0034] The sliding installation method of the limiting shaft 7 is as follows: Two protrusions 1f are distributed along the length of the crossbeam 1 at both ends. Each protrusion 1f has a through hole for the corresponding limiting shaft 7 to pass through. The shape and size of the through hole match the limiting shaft 7, and a sliding fit is formed between the through hole and the corresponding limiting shaft 7. This method has advantages such as simple structure and stable operation. Preferably, the through hole and the limiting shaft 7 are in contact fit through a circumferential surface.
[0035] like Figure 2 and Figure 3 As shown, the locking component 6 has the following structure: Two protrusions 1f are located at the same end of the crossbeam 1. One of the protrusions 1f has a vertically formed threaded hole at its top, connecting to a corresponding through hole. The locking component 6 is a screw screwed into the threaded hole. A corresponding threaded hole 7a is formed on the limiting shaft 7 for the screw shank to be screwed into. The limiting shaft 7 can be locked or unlocked by screwing in or out the screw, making operation convenient.
[0036] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1. The difference is that the locking part 6 is two nuts screwed to both ends of the limiting shaft 7, and the two nuts press against the opposite side walls of the corresponding two protrusions 1f.
[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. An electric hoist lifting support, comprising a crossbeam (1) and two hooks (2), wherein a connecting block (1a) is formed on the top wall of the middle part of the crossbeam (1), and a hanging hole (1b) is horizontally penetrating the connecting block (1a), characterized in that, Both ends of the crossbeam (1) are fitted with U-shaped frames (3) that match the crossbeam (1). Two hooks (2) are installed in the middle of the two frames (3). A connecting shaft (4) is fixed horizontally between the two ends of the frames (3). At least one row of positioning notches (1c) matching the connecting shaft (4) is formed on the top wall of both ends of the crossbeam (1). The positioning notches (1c) are set through the width direction of the crossbeam (1), and multiple positioning notches (1c) in the same row are evenly distributed along the length direction of the crossbeam (1). The lower side of the two connecting shafts (4) is inserted into one of the positioning notches (1c). The crossbeam (1) is also provided with two limiting structures that can be released to restrict the upward movement distance of the two frames (3). Under the action of the limiting structures, the lower side of the connecting shaft (4) is always in the corresponding positioning notch (1c).
2. The electric hoist lifting bracket according to claim 1, characterized in that, The frame (3) is also horizontally provided with positioning shafts (5), and the two ends of the positioning shafts (5) are respectively fixed to the two ends of the corresponding frame (3), and the two positioning shafts (5) are respectively above the two connecting shafts (4).
3. The electric hoist lifting bracket according to claim 2, characterized in that, The limiting structure includes a locking member (6) and a limiting shaft (7) horizontally disposed above the crossbeam (1). The limiting shaft (7) is slidably disposed on the crossbeam (1) along the length direction of the crossbeam (1). By sliding the limiting shaft (7), it can be positioned directly above the corresponding connecting shaft (4) or offset from the position of the corresponding connecting shaft (4). The locking member (6) is used to release the corresponding limiting shaft (7) to the sliding position.
4. The electric hoist lifting bracket according to claim 3, characterized in that, The two ends of the crossbeam (1) each have two protrusions (1f) distributed along the length of the crossbeam (1). Each protrusion (1f) has a through hole through which the corresponding limiting shaft (7) passes, and the through hole and the corresponding limiting shaft (7) form a sliding fit.
5. The electric hoist lifting bracket according to claim 4, characterized in that, Among the two protrusions (1f) on the same end of the crossbeam (1), one of the protrusions (1f) has a threaded hole 1 that connects to the corresponding through hole vertically on its top. The locking member (6) is a screw screwed into the threaded hole 1. The limiting shaft (7) has a corresponding threaded hole 2 (7a) for the screw rod to be screwed into.
6. The electric hoist lifting bracket according to claim 4, characterized in that, The locking element (6) consists of two nuts screwed onto both ends of the limiting shaft (7), and the two nuts press against the opposite sidewalls of the corresponding two protrusions (1f).
7. The electric hoist lifting bracket according to claim 3, characterized in that, A limiting channel (8) is formed between the connecting shaft (4) and the positioning shaft (5) corresponding to the position, and the limiting shaft (7) passes through the corresponding limiting channel (8).