Movable manual lifting device

Abstract

The invention discloses a movable manual lifting device in the technical field of lifting devices.The movable manual lifting device comprises a frame, a discharging platform and an adjusting mechanism, a plurality of self-locking type universal wheels are fixedly installed at the lower end of the frame, a vertically-distributed lifting column is fixedly connected to the middle of the frame, the discharging platform is arranged at the front end of the lifting column, and the adjusting mechanism is arranged on the discharging platform; the adjusting mechanism is installed on the frame to drive the discharging platform to vertically ascend and descend. The invention has the following advantages: in the embodiment of the invention, the square steel tubes are welded into the frame and the lifting column, and the reinforcing plates, the first reinforcing rods and the second reinforcing rods are arranged to form a plurality of triangular supporting structures, so that the overall rigidity is obviously enhanced, and the stability is ensured when a heavy object is borne; a transmission mode of combining a differential gear rocker and a steel wire rope is adopted, slow and stable lifting control is achieved by driving a gear set through the rocker, labor is saved in operation, self-locking hovering can be achieved at any time, and materials of different heights can be accurately lifted and positioned conveniently.

Description

Technical Field

[0001] This invention relates to the field of lifting device technology, specifically to a mobile manual lifting device. Background Technology

[0002] In interior decoration construction, especially in gypsum board ceiling installation, it is often necessary to transport large and heavy boards to high places for positioning and fixing. Currently, there are two main construction methods: one is to manually erect scaffolding or use simple ladders and stools, with workers carrying and lifting the boards one by one; the other is to use hydraulic scissor lifts or electric lifting platforms for material transportation.

[0003] The existing methods described above all have significant drawbacks: Manual scaffolding is not only inefficient and labor-intensive, but also requires workers to frequently climb to heights, posing safety risks such as falls and imbalances. Furthermore, scaffolding occupies a large area and is difficult to move in narrow spaces or spaces already furnished. While hydraulic scissor lifts can achieve smooth lifting, they are bulky and expensive. In addition, there are some simple manual lifting devices on the market, such as those that use screw drives to lift platforms. Although these devices have some movement and lifting capabilities, the screws are prone to wear after prolonged use, leading to asynchronous lifting, jamming, or even failure, resulting in poor load-bearing stability and safety hazards. Summary of the Invention

[0004] The technical problem this invention aims to solve is that the screw in existing manual lifting devices is prone to wear after long-term use, which affects the lifting of materials.

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0006] A mobile manual lifting device includes a frame, a feeding platform, and an adjustment mechanism. Several self-locking casters are fixedly installed at the lower end of the frame. Vertically distributed lifting columns are fixedly connected to the middle of the frame. The feeding platform is located at the front end of the lifting columns. The adjustment mechanism is installed on the frame to drive the feeding platform to move vertically up and down.

[0007] The adjustment mechanism includes a differential gear rocker and a steel wire rope. The differential gear rocker is mounted on the frame. One end of the steel wire rope is connected to the differential gear rocker. A sliding component is connected to the lower end of the feeding platform. The other end of the steel wire rope is connected to the sliding component. The differential gear rocker drives the steel wire rope to pull the feeding platform vertically up and down.

[0008] Furthermore, a square sleeve is vertically slidably provided on the lifting column, and a horizontally distributed connecting frame is fixedly connected to the upper end of the square sleeve. A vertically distributed vertical pipe is fixedly connected to the lower end of the feeding platform, and the vertical pipe is fixedly connected to the front end of the connecting frame.

[0009] Furthermore, a fixed pulley is fixedly connected to the upper end of the lifting column, a lifting wheel is fixedly connected to the square sleeve, and the wire rope passes through the fixed pulley and the lifting wheel in sequence and is fixedly connected to the outer side of the upper end of the lifting column.

[0010] Furthermore, an inclined first reinforcing rod is fixed between the square sleeve and the connecting frame, forming a stable triangular structure.

[0011] Furthermore, the upper rear side of the frame has inherently inclined support columns, and the differential gear rocker arm is fixedly installed on the upper end of the support columns.

[0012] Furthermore, a second reinforcing rod is fixedly connected between the support column and the lifting column.

[0013] Furthermore, an inclined reinforcing plate is fixed between the outer side of the lifting column and the vehicle frame, forming several stable triangular structures.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows:

[0015] In this embodiment of the invention, universal wheels with self-locking function are provided under the frame, which facilitates flexible movement of the entire device and can be quickly locked in the working position to prevent accidental displacement during use and improve operational safety. The frame and lifting column are welded from square steel tubes and reinforced with reinforcing plates, a first reinforcing rod, and a second reinforcing rod to form multiple triangular support structures, which significantly enhances the overall rigidity and ensures stability when carrying heavy loads. A transmission method combining differential gear rocker and wire rope is adopted. The rocker drives the gear set to achieve slow and smooth lifting control, which is labor-saving and can be self-locked and suspended at any time, making it convenient for precise lifting and positioning of materials at different heights. Attached Figure Description

[0016] Figure 1 This invention provides a three-dimensional mobile manual lifting device. Figure 1 .

[0017] Figure 2 This invention provides a three-dimensional mobile manual lifting device. Figure 2 .

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Frame, 2. Casters, 3. Lifting column, 4. Reinforcing plate, 5. Square sleeve, 6. Lifting wheel, 7. Fixed pulley, 8. Wire rope, 9. Differential gear rocker arm, 10. Support column, 11. Second reinforcing rod, 12. Unloading platform, 13. Vertical pipe, 14. Connecting frame, 15. First reinforcing rod. Detailed Implementation

[0020] like Figure 1-2As shown, a mobile manual lifting device includes a frame 1, a loading platform 12, and an adjustment mechanism. Several self-locking casters 2 are fixedly installed at the lower end of the frame 1. The casters 2 have a self-locking function, which is achieved through a pin and a spring tongue. Pressing down the pin locks the wheel, preventing movement. The frame 1 is welded from square steel tubes with a cross-section of 40mm × 60mm, forming a load-bearing frame. Vertically distributed lifting columns 3 are fixed to the middle of the frame 1. The lifting columns 3 are made of square steel tubes with a cross-section of 90mm × 90mm. The frame 1 and the lifting columns 3 are fixed by welding, forming a guide rail for the lifting movement of the loading platform 12. The loading platform 12 is located at the front end of the lifting columns 3. The adjustment mechanism is installed on the frame 1 to drive the loading platform 12 to move vertically up and down. The loading platform 12 is used to place materials that need to be lifted, such as gypsum board.

[0021] like Figure 1-2 As shown, the adjustment mechanism includes a differential gear rocker arm 9 and a steel wire rope 8. The differential gear rocker arm 9 is mounted on the frame 1. The steel wire rope 8 is an 8# steel wire rope. One end of the steel wire rope 8 is connected to the differential gear rocker arm 9. A sliding assembly is connected to the lower end of the unloading platform 12. The other end of the steel wire rope 8 is connected to the sliding assembly. The differential gear rocker arm 9 rotates the rocker arm, which in turn rotates the internal gear set, driving the steel wire rope 8 to pull the unloading platform 12 vertically up and down. Then, the differential gear rocker arm 9 drives the internal gear set to rotate by rotating the rocker arm, which in turn drives the worm gear transmission. Alternatively, a ratchet and pawl drive can be used to wind up the wire rope 8 on the drum. The self-locking suspension of the wire rope 8 is achieved through the self-locking of the worm gear or ratchet and pawl. A square sleeve 5 is vertically slidably mounted on the lifting column 3. A horizontally distributed connecting frame 14 is fixed to the upper end of the square sleeve 5. A vertically distributed vertical pipe 13 is fixed to the lower end of the feeding platform 12. The vertical pipe 13 is fixed to the front end of the connecting frame 14. A fixed pulley 7 is fixed to the upper end of the lifting column 3. A lifting wheel 6 is fixed to the square sleeve 5. The wire rope 8 passes through the fixed pulley 7 and the lifting wheel 6 in sequence and is then fixed to the outer side of the upper end of the lifting column 3.

[0022] like Figure 1-2 As shown, a first reinforcing rod 15 is fixedly connected to the square sleeve 5 and the connecting frame 14 at an incline, forming a stable triangular structure. This structure is used to reinforce the connection between the sleeve and the connecting frame 14, thereby enhancing the stability of the unloading platform 12 under load. The upper rear side of the frame 1 has an inclined support column 10. The differential gear rocker arm 9 is fixedly installed on the upper end of the support column 10. A second reinforcing rod 11 is fixedly connected between the support column 10 and the lifting column 3, thereby improving the stability of both on the frame 1. An inclined reinforcing plate 4 is fixedly connected between the outer side of the lifting column 3 and the frame 1, forming several stable triangular structures. The reinforcing plate 4 is a steel plate structure with diagonal bracing, used to improve the stability of the frame 1 and the lifting column 3.

[0023] In use, the material to be lifted, such as gypsum board, is placed on the feeding platform 12. Then, the handle on the outside of the differential gear rocker 9 is rotated, which causes the wire rope 8 to be wound into the differential gear rocker 9. After passing through the fixed pulley 7, the wire rope 8 pulls the lifting wheel 6 to rise, which causes the square sleeve 5 to slide vertically upward on the lifting column 3. Then, the feeding platform 12 is moved vertically upward through the connecting frame 14, thus lifting the material.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A mobile hand lift device, characterized by: Including frame (1), material platform (12) and adjusting mechanism, the lower end of frame (1) is fixedly installed with several self-locking universal wheels (2), the middle part of frame (1) is fixedly connected with vertically distributed lifting column (3), material platform (12) is located at the front end of lifting column (3), and the adjusting mechanism is installed on frame (1) to drive material platform (12) vertically lifting movement; The adjusting mechanism includes differential gear rocker (9) and steel wire rope (8), differential gear rocker (9) is installed on frame (1), one end of steel wire rope (8) is connected to differential gear rocker (9), the lower end of material platform (12) is connected with sliding assembly, the other end of steel wire rope (8) is connected to sliding assembly, differential gear rocker (9) drives steel wire rope (8) to pull material platform (12) vertically lifting movement.

2. A mobile hand lift according to claim 1, wherein: The square sleeve (5) is vertically slidably arranged on the lifting column (3), the upper end of the square sleeve (5) is fixedly connected with the horizontally distributed connecting frame (14), the lower end of the material platform (12) is fixedly connected with the vertically distributed vertical pipe (13), and the vertical pipe (13) is fixedly connected to the front end of the connecting frame (14).

3. A mobile hand lift according to claim 2, wherein: The upper end of the lifting column (3) is fixedly connected with a fixed pulley (7), the square sleeve (5) is fixedly connected with a lifting wheel (6), and the steel wire rope (8) is fixedly connected to the outer side of the upper end of the lifting column (3) after passing through the fixed pulley (7) and the lifting wheel (6) in sequence.

4. A mobile hand lift according to claim 3, wherein: The first reinforcing rod (15) is fixedly connected between the square sleeve (5) and the connecting frame (14) and constitutes a stable triangular structure.

5. The mobile hand lift device of claim 1, wherein: The support column (10) is fixedly connected between the square sleeve (5) and the connecting frame (14) and constitutes a stable triangular structure.

6. A mobile hand lift according to claim 5, wherein: The upper end of the support column (10) is fixedly connected with the inclinedly distributed support column (10), and the differential gear rocker (9) is fixedly installed on the upper end of the support column (10).

7. A mobile hand lift according to claim 6, wherein: The second reinforcing rod (11) is fixedly connected between the support column (10) and the lifting column (3). The reinforcing plate (4) is fixedly connected between the outer side of the lifting column (3) and the frame (1) and constitutes a plurality of stable triangular structures.

Images