Lifting device and using method thereof

Abstract

The lifting device comprises a bottom frame, a lower connecting rod, an upper connecting rod, a tray frame and a pull rod, the bottom frame is assembled on a mounting table top, one end of the lower connecting rod is hinged to the bottom frame, one end of the upper connecting rod is hinged to the tray frame, and the pull rod is hinged to the other end of the lower connecting rod and the other end of the upper connecting rod. The lifting device can work in various narrow and inconvenient spaces, the appearance structure of the lifting device is regular, positioning is rapid, and the positioning frequency is reduced while positioning errors are reduced; the structural design is simple, the manufacturing cost is low, the occupied space is small, and the installation mode is flexible; the self-adaptive adjustability is relatively high, the mechanism is simpler, more reliable and safer, and a self-locking function is achieved in the lifting process; the structural design has self-stability, limiting devices in the horizontal direction and the vertical direction are arranged, and the lifting stroke is stable and gentle; interfaces with high applicability are provided on two sides, and driving in different modes can be realized by replacing a rocking handle or a motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of lifting devices, and in particular relates to a lifting device and a use method thereof. Background Art

[0002] Lifting mechanisms are widely used in construction, industrial production, logistics and warehousing, etc. With the development of mechanical processing technology, the field of lifting mechanism technology has put forward new requirements in terms of efficiency improvement, safety and adaptability to different working environments. At present, lifting mechanisms are mainly based on hydraulic, pneumatic and electric cylinders, including traction lifting structure, hydraulic drive lifting structure, scissor lift structure, etc.

[0003] Among them, hydraulically powered lifting mechanisms are mostly used in heavy machinery, workshops, factories or open locations such as outdoors; electric cylinder-powered lifting mechanisms occupy less space than hydraulic-powered lifting mechanisms, but still require a larger installation space, and the electric cylinder system is complex and has a high cost. At the same time, the mechanical structure of the traditional lifting mechanism determines that its installation method is complex, occupies a large space, and has many restrictions on use. Therefore, when a lifting mechanism is needed on a small machine or the processing link is inconvenient to connect to the power supply, and the space restriction is high, an alternative mechanical structure is urgently needed.

[0004] The patent document with announcement number CN103466505A discloses a fixed manual lifting platform, which is not only simple in structure and operation, but also can manually adjust the platform height. A fixed manual lifting platform includes a base, a working platform and a scissor-type lifting mechanism; the scissor-type lifting mechanism is a two-layer scissor assembly, each of which includes an inner support rod and an outer support rod connected in an X shape. The two groups of scissor assemblies at the connection of the two-layer scissor assemblies are connected by a transverse connecting rod. The fixed manual lifting platform also includes a linear transmission mechanism, and the active part of the linear transmission mechanism is connected to a hand-cranked mechanism. The driven part of the linear transmission mechanism is connected to one of the transverse connecting rods. The two transverse connecting rods can be driven by the linear transmission mechanism to move closer or farther from each other, thereby driving the lifting and lowering of the working platform. However, the lifting platform lacks vertical and horizontal limit structures, and is not suitable for connecting to other power sources for rotation and driving.

[0005] The patent document with the announcement number CN117773529A discloses a crank-connecting rod driven high-precision parts press-fitting machine tool, including a frame; the frame is provided with a base; the bottom of the base is provided with a workbench for lifting and moving; the base is provided with a guide track along the height direction; a lifting seat is slidably provided on the guide track; the lifting seat is connected to the lifting seat; the base is provided with a crank-connecting rod driving mechanism; the crank-connecting rod driving mechanism is hinged with the lifting seat; the base is provided with an adjustable stroke mechanism; the adjustable stroke mechanism is arranged between the lifting seat and the workbench; the base is provided with a trigger mechanism for triggering the adjustable stroke mechanism. The present invention sets an adjustable stroke mechanism and a trigger mechanism. Under the drive of the trigger mechanism, the adjustable stroke mechanism changes the distance between the workbench and the lifting seat, thereby changing the stroke of the workbench and expanding the use range of the press-fitting machine tool. However, this patent is a machine tool and cannot perform lifting operations on other non-processed parts. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a lifting device and a use method thereof.

[0007] The present invention is achieved through the following technical solutions.

[0008] The present invention provides a lifting device, comprising a base frame, a lower connecting rod, an upper connecting rod, a pallet frame and a pull rod, wherein the base frame is assembled on a mounting table, one end of the lower connecting rod is hinged on the base frame, one end of the upper connecting rod is hinged on the pallet frame, and the pull rod is respectively hinged to the other ends of the lower connecting rod and the upper connecting rod.

[0009] Preferably, a fixed plate A is provided on the base frame, a slide groove A and a lifting guide column are provided on the fixed plate A, the lifting guide column passes through the fixed plate A through the slide groove A and is slidably connected, a slide groove B is provided on the base frame, a hole A is provided on one side of the slide groove B, the lower connecting rod is placed in the slide groove B, the lower connecting rod is hinged to the base frame through the hole A, and the support rod A of the base frame is parallel to the pull rod.

[0010] Preferably, a slide groove C and a double-headed screw are provided on the lifting guide column, and the double-headed screw passes through the slide groove C and penetrates the lifting guide column.

[0011] Preferably, a connecting head is provided at one end of the double-headed screw, and the double-headed screw is connected to the crank via the connecting head. A through hole and a handle are provided on the crank, and the crank is connected to the connecting head via the through hole, and the handle is rotatably connected to the crank; a rotating part is provided on the double-headed screw, and a limit block is provided on the rotating part.

[0012] Preferably, the threads at both ends of the double-start screw have opposite rotation directions.

[0013] Preferably, a connecting piece A is provided on the pull rod, a trapezoidal threaded hole is provided on the connecting piece A, and both ends of the double-headed screw are connected by penetrating the connecting piece A through the trapezoidal threaded holes.

[0014] Preferably, the pull rod is hinged to the other end of the lower connecting rod and the upper connecting rod through a hinge A, a connecting member B and a guide rod are arranged on the pull rod, a guide hole is arranged on the connecting member B, and the two ends of the guide rod are respectively connected through the connecting member B through the guide holes.

[0015] Preferably, a shaft shoulder is provided in the middle of the guide rod, and limit nuts are provided at both ends of the guide rod. The guide rod passes through the pull rod and is connected with the limit nuts.

[0016] Preferably, a fixed plate B is provided on the pallet rack, a slide groove C is provided on the fixed plate B, a slide groove D is provided on the pallet rack, a hole B is provided on one side of the slide groove D, the upper connecting rod is placed in the slide groove D, the upper connecting rod is hinged to the pallet rack through the hole B, and the support rod B of the pallet rack is parallel to the pull rod.

[0017] A method for using a lifting device comprises the following steps:

[0018] S1: Place the lifting device under the equipment to be lifted in advance and adjust the position so that the tray frame of the lifting device can fit the bottom of the equipment to be lifted well during the lifting process;

[0019] S2: The lifting device performs an ascending action: the through hole of the crank handle is put on the connecting part of one end of the double-headed screw, and the crank handle is turned to drive the double-headed screw to rotate. The two pull rods move outward at the same time while engaging and rotating with the double-headed screw threads. The outward movement of the pull rod drives the lower connecting rod and the upper connecting rod to rotate. The angle formed by the outer sides of the connected lower connecting rod and the upper connecting rod continues to increase, so that the lower connecting rod lifts the pull rod and the upper connecting rod lifts the pallet rack. During the lifting process, the double-headed screw slides upward in the slide groove C of the lifting guide column, and the pull rod slides outward under the action of the guide rod. When the pallet rack is lifted to the highest position, the pull rod contacts the limit nut and is limited. At this time, the pallet rack is lifted to the highest position, thereby realizing the lifting function of the lifting device;

[0020] S3: The lifting device performs a descending action: the handle of the crank handle is rotated in the opposite direction of the ascending action, and the two pull rods move inward at the same time while engaging and rotating with the double-headed screw thread. The inward movement of the pull rod drives the lower connecting rod and the upper connecting rod to rotate, and the angle formed by the outer sides of the connected lower connecting rod and upper connecting rod rotates continuously, so that the lower connecting rod pulls the pull rod downward and the upper connecting rod pulls the pallet rack downward. During the descending process, the double-headed screw slides downward in the guide groove of the lifting guide column, and the pull rod slides inward under the action of the guide rod. When the pull rod contacts the shaft shoulder in the middle of the guide rod, the pallet rack drops to the lowest position, thereby realizing the descending function of the lifting device.

[0021] The beneficial effects of the present invention are:

[0022] The present invention can work in various narrow and inconvenient spaces. The lifter has a regular shape and structure, and can be positioned quickly, reducing positioning errors and the number of positioning times; the structural design is simple, the manufacturing cost is low, the space occupied is small, and the installation method is flexible; the adaptive adjustability is relatively high, the mechanism is simpler, more reliable, and safer, and it has a self-locking function during the lifting process; the structural design has its own stability, and is provided with limit devices in the horizontal and vertical directions, and the lifting stroke is stable and smooth; highly applicable interfaces are provided on both sides, and different driving methods can be achieved by replacing the crank handle or the motor.

[0023] The present invention has a simple and reliable structure and is easy to manufacture and process. It can achieve rapid lifting of an object by placing it under the object to be lifted and applying a driving source from the outside. The input interface has high applicability and can achieve different driving modes by replacing the crank or the motor, thereby increasing the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 is an exploded view of the present invention;

[0026] Figure 3 It is a schematic diagram of the installation of the crank handle of the present invention;

[0027] Figure 4 It is a schematic diagram of the descending state of the present invention;

[0028] In the figure: 1-base frame, 11-fixed plate A, 12-slide groove A, 13-slide groove B, 14-hole A, 15-support rod A, 2-lower connecting rod, 3-upper connecting rod, 4-tray rack, 41-fixed plate B, 42-slide groove C, 43-slide groove D, 44-hole B, 45-support rod B, 5-pull rod, 51-connecting part A, 52-hinge part A, 53-connecting part B, 6-guide rod, 61-shoulder, 7-lifting guide column, 71-slide groove C, 8-double-headed screw, 81-rotating part, 82-limiting block, 83-connecting head, 9-crank handle, 91-through hole, 92-handle, 10-limiting nut. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0030] Example:

[0031] like Figures 1 to 4As shown, a lifting device includes a base frame 1, a lower connecting rod 2, an upper connecting rod 3, a pallet frame 4 and a pull rod 5. The base frame 1 is assembled on a mounting table, one end of the lower connecting rod 2 is hinged to the base frame 1, one end of the upper connecting rod 3 is hinged to the pallet frame 4, and the pull rod 5 is hinged to the other end of the lower connecting rod 2 and the upper connecting rod 3 respectively.

[0032] A fixed plate A11 is arranged on the base frame 1, a slide groove A12 and a lifting guide column 7 are arranged on the fixed plate A11, the lifting guide column 7 passes through the fixed plate A11 through the slide groove A12 and is slidably connected, a slide groove B13 is arranged on the base frame 1, a hole A14 is arranged on one side of the slide groove B13, the lower connecting rod 2 is placed in the slide groove B13, the lower connecting rod 2 is hinged to the base frame 1 through the hole A14, and the support rod A15 of the base frame 1 is parallel to the pull rod 5.

[0033] A slide groove C71 and a double-headed screw 8 are provided on the lifting guide column 7. The double-headed screw 8 passes through the lifting guide column 7 through the slide groove C71. The lifting guide column 7 and the double-headed screw 8 form a sliding pair for guiding the double-headed screw 8 when rising and falling in the slide groove C71 of the lifting guide column 7.

[0034] A connector 83 is provided at one end of the double-headed screw 8, and the cross section of the connector 83 is rectangular. The double-headed screw 8 is connected to the crank 9 through the connector 83. The crank 9 is provided with a through hole 91 and a grip 92. The shape of the through hole 91 corresponds to the connector 83. The crank 9 is connected to the connector 83 through the through hole 91, and the grip 92 is rotatably connected to the crank 9. This end of the double-headed screw 8 can also be connected to an external driving device such as a driving motor.

[0035] The double-headed screw 8 is provided with a rotating part 81, and a limit block 82 is provided on the rotating part 81. The rotating part 81 passes through the lifting guide column 7 and is rotatably connected. The limit blocks 82 are located on both sides of the lifting guide column 7 and are used to fix the position of the double-headed screw 8 on the lifting guide column 7.

[0036] The threads at both ends of the double-headed screw 8 have opposite rotation directions, which is used to enable the pull rods 5 on both sides to move inward or outward at the same time. The double-headed screw 8 passes through the lifting guide column 7 to form a sliding pair, which is used to guide the double-headed screw 8 when rising or falling in the groove of the lifting guide column 7.

[0037] The pull rod 5 is provided with a connecting piece A51, and a trapezoidal threaded hole is provided on the connecting piece A51. Both ends of the double-headed screw 8 are connected through the trapezoidal threaded holes penetrating the connecting piece A51, and the double-headed screw 8 and the pull rod 5 form a thread pair.

[0038] The pull rod 5 is hinged to the other end of the lower connecting rod 2 and the upper connecting rod 3 through a hinge A52. A connecting member B52 and a guide rod 6 are arranged on the pull rod 5. A guide hole is arranged on the connecting member B52. Both ends of the guide rod 6 are connected through the guide holes and penetrate the connecting member B52.

[0039] A shoulder 61 is set in the middle of the guide rod 6, and the shoulder 61 plays a limiting role for the pull rods 5 on both sides. Limit nuts 10 are set at both ends of the guide rod 6. The guide rod 6 passes through the pull rod 5 and is connected with the limit nuts 10. The limit nuts 10 are used to constrain the lifting and lowering to always be within the effective stroke. The two ends of the guide rod 6 pass through the guide holes of the pull rod 5 to form a sliding pair.

[0040] A fixed plate B41 is provided on the pallet rack 4, a slide groove C42 is provided on the fixed plate B41, the lifting guide column 7 passes through the fixed plate B41 through the slide groove C42 and is slidably connected, a slide groove D43 is provided on the pallet rack 4, a hole B44 is provided on one side of the slide groove D43, the upper connecting rod 3 is placed in the slide groove D43, the upper connecting rod 3 is hinged to the pallet rack 4 through the hole B44, and the support rod B45 of the pallet rack 4 is parallel to the pull rod 5.

[0041] A method for using a lifting device comprises the following steps:

[0042] Place the lifting device under the equipment to be lifted in advance and adjust the position so that the tray frame 4 of the lifting device can fit the bottom of the equipment to be lifted well during the lifting process;

[0043] The lifting device performs the ascending action: the through hole 91 of the crank handle 9 is sleeved on the connecting part 83 at one end of the double-headed screw 8, and the crank handle 9 is turned to drive the double-headed screw 8 to rotate. The two pull rods 5 move outward at the same time under the rotation of the threaded engagement with the double-headed screw 8. The outward movement of the pull rod 5 drives the lower connecting rod 2 and the upper connecting rod 3 to rotate. The angle formed by the outer sides of the connected lower connecting rod 2 and the upper connecting rod 3 is continuously increased, so that the lower connecting rod 2 lifts the pull rod 5 and the upper connecting rod 3 lifts the pallet rack 4. During the lifting process, the double-headed screw 8 slides upward in the slide groove C71 of the lifting guide column 7, and the pull rod 5 slides outward under the action of the guide rod 6. When the pallet rack 4 is lifted to the highest position, the pull rod 5 contacts the limit nut 10 and is limited. At this time, the pallet rack 4 is lifted to the highest position, thereby realizing the lifting function of the lifting device;

[0044] The lifting device performs a descending action: the handle 92 of the crank 9 is rotated in the opposite direction of the ascending action, and the two pull rods 5 move inward at the same time while engaging and rotating with the double-headed screw 8. The inward movement of the pull rod 5 drives the lower connecting rod 2 and the upper connecting rod 3 to rotate, and the angle formed by the outer sides of the connected lower connecting rod 2 and the upper connecting rod 3 rotates continuously to reduce, so that the lower connecting rod 2 pulls the pull rod 5 downward and the upper connecting rod 3 pulls the pallet rack 4 downward. During the descending process, the double-headed screw 8 slides downward in the guide groove of the lifting guide column, and the pull rod 5 slides inward under the action of the guide rod 6. When the pull rod 5 contacts the axial shoulder between the guide rod 6, the pallet rack 4 drops to the lowest position, thereby realizing the descending function of the lifting device.

Claims

1. A lifting device, characterized in that: The utility model comprises a base frame (1), a lower connecting rod (2), an upper connecting rod (3), a pallet frame (4) and a pull rod (5); the base frame (1) is assembled on a mounting table; one end of the lower connecting rod (2) is hinged on the base frame (1); one end of the upper connecting rod (3) is hinged on the pallet frame (4); and the pull rod (5) is hinged to the other end of the lower connecting rod (2) and the other end of the upper connecting rod (3), respectively.

2. A lifting device according to claim 1, characterized in that: A fixed plate A (11) is arranged on the base frame (1), a slide groove A (12) and a lifting guide column (7) are arranged on the fixed plate A (11), the lifting guide column (7) passes through the fixed plate A (11) through the slide groove A (12) and is slidably connected, a slide groove B (13) is arranged on the base frame (1), a hole A (14) is arranged on one side of the slide groove B (13), the lower connecting rod (2) is placed in the slide groove B (13), the lower connecting rod (2) is hinged to the base frame (1) through the hole A (14), and the support rod A (15) of the base frame (1) is parallel to the pull rod (5).

3. A lifting device according to claim 2, characterized in that: A slide groove C (71) and a double-headed screw (8) are provided on the lifting guide column (7), and the double-headed screw (8) passes through the lifting guide column (7) through the slide groove C (71).

4. A lifting device according to claim 3, characterized in that: A connecting head (83) is provided at one end of the double-headed screw (8), the double-headed screw (8) is connected to the crank (9) via the connecting head (83), the crank (9) is provided with a through hole (91) and a grip (92), the crank (9) is connected to the connecting head (83) via the through hole (91), and the grip (92) is rotatably connected to the crank (9); a rotating portion (81) is provided on the double-headed screw (8), and a limit block (82) is provided on the rotating portion (81).

5. A lifting device according to claim 4, characterized in that: The threads at both ends of the double-headed screw (8) have opposite rotation directions.

6. A lifting device according to claim 1, characterized in that: A connecting piece A (51) is provided on the pull rod (5), and a trapezoidal threaded hole is provided on the connecting piece A (51). The two ends of the double-headed screw rod (8) are connected by respectively penetrating the connecting piece A (51) through the trapezoidal threaded holes.

7. A lifting device according to claim 1, characterized in that: The pull rod (5) is hinged to the other end of the lower connecting rod (2) and the upper connecting rod (3) through a hinge A (52); a connecting member B (53) and a guide rod (6) are provided on the pull rod (5); a guide hole is provided on the connecting member B (53); and the two ends of the guide rod (6) are connected to the connecting member B (53) through the guide holes.

8. A lifting device according to claim 7, characterized in that: A shaft shoulder (61) is arranged in the middle of the guide rod (6), and limiting nuts (10) are arranged at both ends of the guide rod (6). The guide rod (6) passes through the pull rod (5) and is connected to the limiting nuts (10).

9. A lifting device according to claim 1, characterized in that: A fixing plate B (41) is arranged on the pallet rack (4), a slide groove C (42) is arranged on the pallet rack (4), a slide groove D (43) is arranged on the fixing plate B (41), a hole B (44) is arranged on one side of the slide groove D (43), the upper connecting rod (3) is placed in the slide groove D (43), the upper connecting rod (3) is hinged to the pallet rack (4) through the hole B (44), and the support rod B (45) of the pallet rack (4) is parallel to the pull rod (5).

10. A method for using the lifting device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: placing the lifting device under the equipment to be lifted in advance and adjusting the position so that the tray frame (4) of the lifting device can be well attached to the bottom of the equipment to be lifted during the lifting process; S2: The lifting device performs an ascending action: the through hole (91) of the crank handle (9) is placed on the connecting portion (83) at one end of the double-headed screw (8), and the crank handle (9) is rotated to drive the double-headed screw (8) to rotate. The two pull rods (5) move outward at the same time while engaging with the threads of the double-headed screw (8). The outward movement of the pull rods (5) drives the lower connecting rod (2) and the upper connecting rod (3) to rotate, and the angle formed by the outer sides of the connected lower connecting rod (2) and the upper connecting rod (3) continues to increase. , so that the lower connecting rod (2) lifts the pull rod (5) and the upper connecting rod (3) lifts the pallet rack (4). During the lifting process, the double-headed screw (8) slides upward in the slide groove C (71) of the lifting guide column (7), and the pull rod (5) slides outward under the action of the guide rod (6). When the pallet rack (4) is lifted to the highest position, the pull rod (5) contacts the limit nut (10) and is limited. At this time, the pallet rack (4) is lifted to the highest position, thereby realizing the lifting function of the lifting device; S3: The lifting device performs a descending action: the handle (92) of the crank (9) is rotated in the opposite direction of the ascending action, and the two pull rods (5) move inward at the same time while being engaged with the double-headed screw (8) and rotating. The inward movement of the pull rod (5) drives the lower connecting rod (2) and the upper connecting rod (3) to rotate. The angle formed by the outer rotation of the connected lower connecting rod (2) and the upper connecting rod (3) becomes smaller and smaller, so that the lower connecting rod (2) pulls the pull rod (5) downward and the upper connecting rod (3) pulls the tray rack (4) downward. During the descending process, the double-headed screw (8) slides downward in the guide groove of the lifting guide column, and the pull rod (5) slides inward under the action of the guide rod (6). When the shaft shoulder between the pull rod (5) and the guide rod (6) contacts, the tray rack (4) descends to the lowest position, thereby realizing the descending function of the lifting device.

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