Scissor fork type lifting platform

Abstract

The utility model relates to a scissor fork type lifting platform which comprises a base and an overhaul stand, a first scissor type lifting frame and a second scissor type lifting frame are arranged between the base and the overhaul stand, the scissor type lifting frame comprises two sets of corresponding lifting sub-frames, each lifting sub-frame is composed of a plurality of cross arms, the adjacent cross arms are hinged, telescopic cylinders are arranged on the inner sides of the cross arms, and the telescopic cylinders are arranged on the outer sides of the cross arms. The corresponding cross arms of the two sets of lifting sub-frames are connected through reinforcing rods, the relative movement direction of the two sides of the cross arm of the first shear type lifting frame is perpendicular to the relative movement direction of the two sides of the cross arm of the second shear type lifting frame, and it is guaranteed that after the overhaul stand is lifted, supporting points of the shear type supporting frames to the overhaul stand can still be arranged in a scattered mode; meanwhile, the first shear type lifting frame and the second shear type lifting frame are mutually restricted, so that the possibility of transverse shaking of the overhaul stand is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery technology, specifically to a scissor lift platform. Background Technology

[0002] Scissor lift work platforms convert the horizontal / rotational motion of the drive mechanism into pure vertical lifting of the work platform through the symmetrical unfolding and folding of the cross arms. During ascent, the angle between the two vertical arms of the cross arms increases, propelling the platform vertically upward; during descent, the angle decreases, and the platform smoothly returns along its original vertical path. However, a drawback of a single scissor lift work platform is that it typically requires one fixed fulcrum and one movable fulcrum to operate. As the platform rises, the two fulcrums move closer together, with the movable fulcrum gradually shifting towards the platform's center of gravity, reducing the platform's stability. The higher the platform rises, the less stable it becomes. Furthermore, while a single scissor lift work platform offers strong longitudinal support after elevation, its lateral stability is poor, making it prone to lateral swaying. Shifts in personnel weight or the equipment's center of gravity can pose safety hazards. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a scissor lift platform. By setting up a first scissor lift frame and a second scissor lift frame, it ensures that after the maintenance platform is raised, the scissor support frame can still be distributed to support the maintenance platform, thus ensuring the stability of the maintenance platform. At the same time, since the movement directions of the cross arms of the first and second scissor lift frames are perpendicular to each other, the first and second scissor lift frames restrain each other, reducing the possibility of lateral swaying of the maintenance platform.

[0004] This utility model provides a scissor lift platform to solve the above-mentioned technical problems. It includes a base and a maintenance platform. A walking system is provided on the base. A first scissor lift frame and a second scissor lift frame are provided between the base and the maintenance platform. Each scissor lift frame includes two corresponding sets of lifting sub-frames. Each lifting sub-frame is composed of several cross arms, with adjacent cross arms hinged together. A telescopic cylinder is provided on the inner side of each cross arm. One end of the telescopic cylinder is hinged to one side of one cross arm, and the other end is hinged to the other side of an adjacent cross arm. The cross arms of the two sets of lifting sub-frames are connected by reinforcing rods. The relative movement direction of the two sides of the cross arms of the first scissor lift frame is perpendicular to the relative movement direction of the two sides of the cross arms of the second scissor lift frame.

[0005] Furthermore, the two lifting sub-frames of the first scissor lift are evenly distributed along the left-right direction of the base, and the fixed support point of the first scissor lift is located on the rear side of the base. The two lifting sub-frames of the second scissor lift are arranged along the front-back direction of the base and are located on the front side of the base, offset from the first scissor lift in the front-back direction.

[0006] Furthermore, one side of the lowermost cross arm of the first scissor lift is hinged to the rear end of the base, and the other end is slidably connected to the base in the front-back direction; one side of the uppermost cross arm of the first scissor lift is hinged to the rear end of the inspection platform, and the other end is slidably connected to the inspection platform in the front-back direction.

[0007] One side of the lowermost cross arm of the second scissor lift is hinged to the base, and the other side is slidably connected to the base in the left-right direction. One side of the uppermost cross arm of the second scissor lift is hinged to one side of the maintenance platform, and the other side is slidably connected to the maintenance platform in the left-right direction.

[0008] Furthermore, the walking system includes two diagonally arranged reversing wheels and a driven wheel. The reversing wheels are driven to rotate by a drive mechanism and are connected to the base through the reversing mechanism.

[0009] Furthermore, the reversing mechanism includes a fixed gear fixed to the base, a reversing frame rotatably mounted on the fixed gear, a reversing gear meshing with the fixed gear rotatably mounted on the reversing frame, the reversing gear being fixed to the output end of a reversing motor fixed on the reversing frame, and the reversing travel wheel rotatably mounted on the reversing frame.

[0010] Furthermore, the base is also provided with at least one set of telescopic arms, and the end of the telescopic arm away from the base is also provided with a lifting support foot.

[0011] Furthermore, the telescopic arm is movably disposed within the fixed arm and can move along the axial direction of the fixed arm. The fixed arm is also provided with a first motor, the output end of which is fixed with a first screw. The inner extension end of the telescopic arm is provided with a first threaded sleeve that is threadedly engaged with the first screw.

[0012] Furthermore, the lifting support foot is movably disposed within the fixed support rod and can move along the axial direction of the fixed support rod. A second motor is provided inside the fixed support rod, and a second screw is fixed to the output end of the second motor. A second threaded sleeve that is threadedly engaged with the second screw is provided on the inner extension end of the lifting support foot.

[0013] Furthermore, the inspection platform is equipped with protective railings.

[0014] The beneficial effects of this utility model are as follows: the base supports the maintenance platform, and the walking system on the base facilitates the movement of the maintenance platform. A first scissor lift frame and a second scissor lift frame are installed between the base and the maintenance platform to support the platform while simultaneously raising and lowering it to adapt to maintenance conditions. Even after the maintenance platform is raised, the first and second scissor lift frames still provide distributed support to the platform's fulcrum, ensuring its stability. The scissor lift frame includes two corresponding sets of lifting subframes, each composed of several cross arms, with adjacent cross arms hinged. During the raising and lowering of the maintenance platform, the vertical angle between the cross arms increases or decreases, driving the platform up or down. Telescopic cylinders on the inner side of the cross arms extend and retract, driving the scissor lift frame to rise and fall. The cross arms of the two sets of lifting subframes are connected by reinforcing rods, increasing the structural strength of the scissor lift frame and ensuring synchronous movement of the two sets of lifting subframes, further enhancing stability. The relative movement direction of the cross arms on both sides of the first scissor lift is perpendicular to the relative movement direction of the cross arms on both sides of the second scissor lift, making the lateral swaying directions of the two scissor lifts perpendicular. This allows the two scissor lifts to restrain each other when swaying laterally, reducing the possibility of the maintenance platform swaying and ensuring the stability of the maintenance platform.

[0015] In summary, by employing the first and second scissor lift frames of this invention, it is ensured that even after the maintenance platform is raised and one support point of the scissor lift frame moves closer to the other, the two scissor support frames can still be distributed to support the maintenance platform, thus improving its support. Furthermore, since the movement directions of the two sides of the cross arms of the first and second scissor lift frames are perpendicular, meaning their lateral swaying directions are perpendicular, the first and second scissor lift frames mutually restrain each other, reducing the possibility of lateral swaying of the maintenance platform and improving its stability.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the telescopic arm of this utility model;

[0019] Figure 3 This is a schematic diagram of the reversing travel wheel of this utility model;

[0020] Figure 4 for Figure 3 A magnified view of the details of A;

[0021] Figure 5This is a structural schematic diagram of the scissor lift frame of this utility model.

[0022] In the attached diagram: 1-base, 2-maintenance platform, 21-guardrail, 3-reversing wheel, 31-drive mechanism, 32-reversing mechanism, 321-fixed gear, 322-reversing frame, 323-reversing gear, 324-reversing motor, 4-first scissor lift frame, 5-second scissor lift frame, 600-lifting subframe, 610-telescopic cylinder, 620-cross arm, 630-reinforcing rod, 81-telescopic arm, 82-fixed arm, 83-first motor, 84-first screw, 85-first threaded sleeve, 91-lifting support foot, 92-fixed support rod, 93-second motor, 94-second screw, 95-second threaded sleeve. Detailed Implementation

[0023] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0024] Reference Figures 1 to 5 This utility model provides an embodiment of a scissor lift platform.

[0025] For ease of understanding and description, in this embodiment, the forward direction of the scissor lift platform is considered as "front" and the backward direction as "rear". It should be understood that the terms "up", "down", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] A scissor lift platform includes a base 1 and a maintenance platform 2. The base 1 supports the maintenance platform 2. The base 1 is equipped with a walking system for driving the scissor lift platform to move. The walking system includes two diagonally arranged reversing wheels 3 and driven wheels. The reversing wheels 3 are used to allow the scissor lift platform to move arbitrarily.

[0027] A first scissor lift 4 and a second scissor lift 5 are provided between the base 1 and the maintenance platform 2. These support the maintenance platform 2 while simultaneously raising and lowering it to adapt to maintenance conditions. Even after the maintenance platform 2 is raised, the first scissor lift 4 and the second scissor lift 5 can still provide distributed support to the fulcrum of the maintenance platform 2, ensuring its stability.

[0028] The scissor lift includes two corresponding sets of lifting sub-frames 600. Each lifting sub-frame 600 is composed of several cross arms 620, and adjacent cross arms 620 are hinged together. A telescopic cylinder 610 is provided on the inner side of each cross arm 620. One end of the telescopic cylinder 610 is hinged to one side of one of the cross arms 620, and the other end is hinged to the other side of the adjacent cross arm 620. During the lifting and lowering of the maintenance platform 2, the included angle of the cross arms 620 in the vertical direction increases or decreases, driving the maintenance platform 2 to rise or fall. The telescopic cylinder 610 on the inner side of the cross arms 620 extends and retracts to drive the scissor lift to rise and fall.

[0029] The two sets of lifting subframes 600 are connected by reinforcing rods 630, which increases the structural strength of the scissor lift and ensures that the two sets of lifting subframes 600 can move synchronously, further improving stability. At this time, one end of the telescopic cylinder 610 is hinged to the reinforcing rod 630 between one of the cross arms 620, and the other end is hinged to the reinforcing rod 630 on the other cross arm 620.

[0030] The relative movement direction of the two sides of the cross arm 620 of the first scissor lift 4 is set perpendicular to the relative movement direction of the two sides of the cross arm 620 of the second scissor lift 5. At this time, the lateral swaying direction of the two scissor lifts is perpendicular, which can make the two scissor lifts restrain each other when laterally swaying, reduce the possibility of lateral swaying of the maintenance platform 2, and ensure the stability of the maintenance platform 2.

[0031] By employing the first scissor lift frame 4 and the second scissor lift frame 5, this utility model ensures that after the maintenance platform 2 is raised, even as one support point of the scissor lift frame moves closer to the other support point, the two scissor support frames can still be distributed to support the maintenance platform 2, thus improving the support for the maintenance platform 2. Furthermore, since the movement directions on both sides of the cross arm 620 of the first scissor lift frame 4 and the second scissor lift frame 5 are perpendicular, meaning that the lateral swaying directions of the first scissor lift frame 4 and the second scissor lift frame 5 are perpendicular, the first scissor lift frame 4 and the second scissor lift frame 5 mutually restrain each other, reducing the possibility of lateral swaying of the maintenance platform 2 and improving the stability of the maintenance platform 2.

[0032] In some embodiments, the two lifting sub-frames 600 of the first scissor lift frame 4 are evenly distributed along the left-right direction of the base 1, and the fixed support point of the first scissor lift frame 4 is located on the rear side of the base 1. The two lifting sub-frames 600 of the second scissor lift frame 5 are arranged along the front-back direction of the base 1 and are located on the front side of the base 1, offset from the first scissor lift frame 4. At this time, the two fixed support points of the two lifting sub-frames 600 of the first scissor lift frame 4 provide stable support for the rear side of the maintenance platform 2, and even if the two sliding support points slide towards the center of gravity of the maintenance platform 2 during the lifting process, the fixed support points and sliding support points of the two lifting sub-frames 600 of the second scissor lift frame 5 can still support the front side of the maintenance platform 2. Through the joint support of the first scissor lift frame 4 and the second scissor lift frame 5, the stability of the maintenance platform 2 is ensured.

[0033] Furthermore, one side of the lowermost cross arm 620 of the first scissor lift 4 is hinged to the rear end of the base 1, and the other end is slidably connected to the base 1 in the front-back direction. Specifically, the base 1 is provided with a first lower slide rail extending in the front-back direction of the base 1, and a first lower slide block that slidably engages with the first lower slide rail is provided on one side of the bottom of the lowermost cross arm 620. One side of the uppermost cross arm 620 of the first scissor lift 4 is hinged to the rear end of the inspection platform 2, and the other end is slidably connected to the inspection platform 2 in the front-back direction. Specifically, the inspection platform 2 is provided with a first upper slide rail extending in the front-back direction of the base 1, and a first upper slide block that slidably engages with the first upper slide rail is provided on one side of the uppermost cross arm 620. The second scissor lift 5 is located on one side of the front end of the base 1. One side of the lowermost cross arm 620 of the second scissor lift 5 is hinged to the base 1, and the other side is slidably connected to the base 1 in the left-right direction. The base 1 is provided with a second lower slide rail extending in the left-right direction, and one side of the lowermost cross arm 620 is provided with a second lower slide block that slidably engages with the second lower slide rail. One side of the uppermost cross arm 620 of the second scissor lift 5 is hinged to one side of the inspection platform 2, and the other side is slidably connected to the inspection platform 2 in the left-right direction. Specifically, the inspection platform 2 is provided with a second upper slide rail extending in the left-right direction of the base 1, and one side of the uppermost cross arm 620 is provided with a second upper slide block that slidably engages with the second upper slide rail. At this time, the hinge end serves as the fixed fulcrum for the maintenance platform 2, and the sliding end serves as the sliding fulcrum for the maintenance platform 2. The sliding fulcrum of the first scissor lift 4 slides along the front-back direction of the base 1, while the fixed fulcrum always supports the rear end of the maintenance platform 2. The sliding fulcrum of the second scissor lift 5 moves along the left-right direction of the base 1, while the fixed fulcrum always supports the front end of the maintenance platform 2.

[0034] In some embodiments, to facilitate the control of the movement of the maintenance platform 2, the reversing wheels 3 are driven to rotate by a drive mechanism 31 and connected to the base 1 by a reversing mechanism 32. In this embodiment, there are two reversing wheels 3 located at opposite corners of the base 1, and two driven wheels located at the other two opposite corners of the base. The two diagonally positioned reversing wheels 3 are equipped with reversing mechanisms 32. The drive mechanism 31 drives the reversing wheels 3 to rotate and move the maintenance platform 2. The drive mechanism 31 can be a motor, and the reversing mechanism 32 controls the direction of movement of the maintenance platform 2.

[0035] Furthermore, the reversing mechanism 32 includes a fixed gear 321 fixed to the base 1, a reversing frame 322 rotatably mounted on the fixed gear 321, and a reversing gear 323 rotatably mounted on the reversing frame 322, meshing with the fixed gear 321. The reversing gear 323 is fixed to the output end of the reversing motor 324 fixed on the reversing frame 322, and the reversing wheel 3 is rotatably mounted on the reversing frame 322. Since the fixed gear 321 is fixed, when the reversing motor 324 drives the reversing gear 323 to rotate, the reversing gear 323 rotates on its own axis while simultaneously revolving around the circumference of the fixed gear 321. Because the reversing gear 323 is mounted on the reversing frame 322, it drives the reversing frame 322 to rotate around the circumference of the fixed gear 321, changing the direction of travel of the reversing wheel 3 located on the reversing frame 322.

[0036] In some embodiments, due to uneven ground or other reasons, a reinforcing stabilizing component is also provided on the base 1 to further ensure the stability of the maintenance platform 2. Further, the reinforcing stabilizing component includes a telescopic arm 81 and a lifting support foot 91. At least one set of telescopic arms 81 is provided on the base 1, and a lifting support foot 91 is also provided at the end of each telescopic arm 81 away from the base 1. In this embodiment, two sets of telescopic arms 81 are provided, cut off from the front side of the base 1. The support position of the lifting support foot 91 can be controlled by the telescopic arms 81, and the lifting support foot 91 can be adjusted according to the ground height to ensure stable support on the ground.

[0037] Furthermore, the telescopic arm 81 is movably disposed within the fixed arm 82 and can move along the axial direction of the fixed arm 82. The cross-sections of the telescopic arm 81 and the fixed arm 82 are non-circular, which can prevent the telescopic arm 81 from rotating and ensure that it can only move along the axial direction of the telescopic arm 81. In this embodiment, the telescopic arm 81 has a square structure. A first motor 83 is also provided inside the fixed arm 82. A first screw 84 is fixed to the output end of the first motor 83. A first threaded sleeve 85 is provided on the inner extension end of the telescopic arm 81, which is threadedly engaged with the first screw 84. At this time, the rotation of the first motor 83 drives the first screw 84 to rotate, and the first threaded sleeve 85 moves in the axial direction of the first screw 84, which can drive the telescopic arm 81 to extend out of or retract into the fixed arm 82, thereby controlling the telescopic length of the telescopic arm 81.

[0038] Furthermore, the lifting support foot 91 is movably disposed within the fixed support rod 92 and can move along the axial direction of the fixed support rod 92. The fixed support rod 92 is fixed to the extended end of the telescopic arm 81. The cross-sections of the fixed support rod 92 and the lifting support foot 91 are non-circular to prevent rotation of the lifting support foot 91. A second motor 93 is housed within the fixed support rod 92. A second screw 94 is fixed to the output end of the second motor 93. A second threaded sleeve 95, threadedly engaged with the second screw 94, is provided on the extended end of the lifting support foot 91. When the second motor 93 drives the second screw 94 to rotate, the second threaded sleeve 95 drives the lifting support foot 91 to move axially along the second screw 94, thereby achieving the lifting and lowering of the lifting support foot 91 to adapt to the ground height.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 scissor lift platform, characterized in that, Includes a base (1) and a maintenance platform (2), wherein the base (1) is equipped with a walking system. A first scissor lift (4) and a second scissor lift (5) are provided between the base (1) and the inspection platform (2). The scissor lift frame includes two corresponding sets of lifting subframes (600). Each lifting subframe (600) is composed of several cross arms (620), and adjacent cross arms (620) are hinged together. A telescopic cylinder (610) is provided on the inner side of each cross arm (620). One end of the telescopic cylinder (610) is hinged to one side of one of the cross arms (620), and the other end is hinged to the other side of the adjacent cross arm (620). The corresponding cross arms (620) of the two sets of lifting subframes (600) are connected by a reinforcing rod (630). The relative movement direction of the cross arm (620) on both sides of the first scissor lift (4) is perpendicular to the relative movement direction of the cross arm (620) on both sides of the second scissor lift (5).

2. The scissor lift platform of claim 1, wherein, The two lifting subframes (600) of the first scissor lift frame (4) are evenly distributed along the left and right directions of the base (1), and the fixed support point of the first scissor lift frame (4) is located on the rear side of the base (1). The two lifting subframes (600) of the second scissor lift frame (5) are arranged along the front and back directions of the base (1), and are located on the front side of the base (1) and are offset from the first scissor lift frame (4) in the front and back directions.

3. The scissor lift platform of claim 2, wherein, One side of the lowermost cross arm (620) of the first scissor lift (4) is hinged to the rear end of the base (1), and the other end is slidably connected to the base (1) in the front-back direction. One side of the uppermost cross arm (620) of the first scissor lift (4) is hinged to the rear end of the inspection platform (2), and the other end is slidably connected to the inspection platform (2) in the front-back direction. One side of the lowermost cross arm (620) of the second scissor lift (5) is hinged to the base (1), and the other side is slidably connected to the base (1) in the left-right direction. One side of the uppermost cross arm (620) of the second scissor lift (5) is hinged to one side of the inspection platform (2), and the other side is slidably connected to the inspection platform (2) in the left-right direction.

4. The scissor lift platform of claim 1, wherein, The walking system includes two diagonally arranged reversing walking wheels (3) and driven walking wheels. The reversing walking wheels (3) are driven to rotate by a drive mechanism (31) and connected to the base (1) by a reversing mechanism (32).

5. The scissor lift platform of claim 4, wherein, The reversing mechanism (32) includes a fixed gear (321) fixed to the base (1), a reversing frame (322) rotatably mounted on the fixed gear (321), a reversing gear (323) rotatably mounted on the reversing frame (322) meshing with the fixed gear (321), the reversing gear (323) being fixed to the output end of a reversing motor (324) fixed on the reversing frame (322), and the reversing travel wheel (3) rotatably mounted on the reversing frame (322).

6. The scissor lift platform according to claim 1, characterized in that, The base (1) is also provided with at least one set of telescopic arms (81), and the end of the telescopic arm (81) away from the base (1) is also provided with a lifting support foot (91).

7. The scissor lift platform of claim 6, wherein, The telescopic arm (81) is movably disposed within the fixed arm (82) and can move along the axial direction of the fixed arm (82). The fixed arm (82) is also provided with a first motor (83). The output end of the first motor (83) is fixed with a first screw (84). The inner extension end of the telescopic arm (81) is provided with a first threaded sleeve (85) that is threadedly engaged with the first screw (84).

8. The scissor lift platform of claim 6, wherein, The lifting support foot (91) is movably disposed within the fixed support rod (92) and can move along the axial direction of the fixed support rod (92). The fixed support rod (92) is provided with a second motor (93). The output end of the second motor (93) is fixed with a second screw (94). The inner extension end of the lifting support foot (91) is provided with a second threaded sleeve (95) that is threadedly engaged with the second screw (94).

9. The scissor lift platform according to claim 1, characterized in that, The inspection platform (2) is equipped with a guardrail (21).

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