Scissor fork type lifting working platform device capable of rotating

Abstract

The invention relates to the technical field of lifting working platforms, in particular to a rotatable scissor-type lifting working platform device. The device comprises a support and a slewing bearing, the slewing bearing is mounted on the support, and the slewing bearing is used for driving the support to rotate; the bottom of the shear fork arm frame is installed on the support, and a working platform is installed on the top of the shear fork arm frame; the first limiting assembly is mounted on the support, and the first limiting assembly is used for limiting the slewing bearing to rotate within a preset angle threshold value; and the second limiting assembly is installed at the bottom of the shear fork arm frame, and the second limiting assembly is used for limiting the working platform to do lifting motion within a preset height range. According to the invention, a rotating function is added to the working platform, so that the working range covered by the working platform can be expanded through the rotating motion of the working platform on the premise that the support does not need to be horizontally moved, and the purposes of avoiding collision and meeting the multi-directional operation requirement are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of lifting work platforms, and in particular to a rotatable scissor-type lifting work platform device. Background Art

[0002] A lifting work platform is a professional device that lifts people or equipment tools to a specified height to perform operations. Lifting work platforms are divided into various forms, mainly scissor-type, folding arm type, straight arm type, etc. At present, it is widely used in the domestic and foreign markets, especially the scissor-type lifting work platform, which is expected to replace ladders and scaffoldings and become the mainstream tool for high-altitude operations.

[0003] For special work sites, such as railway tunnel dome construction, the working conditions are complicated and people or equipment tools need to cross obstacles such as high-voltage wires and cables, lighting equipment, water pipelines, etc. to reach the top for high-altitude work. Due to the limitations of dome construction, the working space above is narrow and the work platform can only be raised and lowered in the vertical direction. If it moves and swings in the horizontal direction, it is easy to touch obstacles and cause danger, which cannot meet the multi-faceted work requirements. Summary of the invention

[0004] The object of the present invention is to provide a rotatable scissor-type lifting work platform device. By adding a rotation function to the work platform, the working range that can be covered by the work platform can be expanded by rotating the work platform within a preset range without the need for a horizontally movable support, so as to avoid collisions while meeting multi-directional working requirements as much as possible.

[0005] In order to achieve the above object, the present invention adopts the following technical solution to solve the problem: In a first aspect, the present invention provides a rotatable scissor lift work platform device, comprising: Support, A slewing bearing is mounted on the support, and the slewing bearing is used to drive the support to perform a rotational motion; A scissor arm frame, the bottom of which is mounted on the support, and a working platform is mounted on the top of the scissor arm frame; A first limiting assembly is mounted on the support, and the first limiting assembly is used to limit the slewing bearing to perform rotational movement within a preset angle threshold; The second limit assembly is installed at the bottom of the scissor arm frame, and the second limit assembly is used to limit the lifting movement of the working platform within a preset height range.

[0006] Optionally, it also includes a lifting cylinder, which is transmission-connected to the scissor arm frame to drive the working platform to perform lifting movements.

[0007] Optionally, the first limit assembly includes an electronic limit mechanism, the electronic limit mechanism includes a slewing limit switch installed on the support, and the slewing limit switch is used to send a signal to stop the slewing support from rotating when the slewing support rotates to a preset angle threshold.

[0008] Optionally, the first limit assembly further includes a rotational mechanical limiter, and the rotational mechanical limiter is used to prevent the slewing bearing from continuing to rotate when the slewing bearing rotates to a preset angle threshold.

[0009] Optionally, the preset angle threshold is 20°.

[0010] Optionally, the second limit assembly includes an upper limit detection plate and a lower limit detection plate, the upper limit detection plate is used to cooperate with the travel switch to identify and determine the height value of the working platform, and the lower limit detection plate is used to cooperate with the travel switch to identify and determine the lower limit height of the working platform.

[0011] Optionally, it also includes: A guardrail assembly is installed on the working platform, the guardrail assembly includes a front guardrail, a rear guardrail and a side guardrail, and the two sides of the side guardrail are detachably connected to the front guardrail and the rear guardrail respectively through latches; The guardrail assembly can be folded onto the work platform to reduce the height of the guardrail assembly.

[0012] Optionally, it also includes: A first hinged seat, provided on the working platform, the first hinged seat being used to be hingedly connected to the bottom end of the front guardrail or the rear guardrail, so that the front guardrail and the rear guardrail can be rotated relative to the first hinged seat and laid on the working platform; A support rod is provided on the working platform, and the bottom end of the side guardrail is hinged to the top end of the support rod; After the connection of the latch is released, the front guardrail and the rear guardrail are rotated relative to the first hinge seat and laid on the work platform, and then the side guardrail can be rotated downward relative to the top end of the support rod and abut against the front guardrail and the rear guardrail laid on the work platform to fold the guardrail assembly.

[0013] Optionally, it also includes: A side door is installed on the working platform and is located below the side guardrail.

[0014] Optionally, a maintenance bracket is installed on the scissor arm frame, and the maintenance bracket is used to prop up the scissor arm frame during maintenance.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The scissor lift work platform of the present invention has not only the basic lifting function, but also the rotation function, which is very flexible to use. It can avoid collision failures in the narrow working space above and meet the use requirements of multi-directional space operations.

[0016] 2. The present invention limits the lifting and rotating motion of the scissor-type lifting work platform through a limit device, thereby adding a rotation function while limiting the rotation range and the lifting range to avoid collision caused by an excessively large rotation range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the scissor-type lifting work platform device in Example 1; Figure 2 It is a structural schematic diagram of the scissor-type lifting work platform device when the scissor-type arm frame is in a falling state; Figure 3 for Figure 2 A schematic diagram of the structure from another perspective; Figure 4 It is a structural schematic diagram of the slewing bearing in the initial position; Figure 5 The schematic diagram of the rotation of the slewing bearing when it rotates counterclockwise at a preset angle; Figure 6 The schematic diagram of the rotation of the slewing bearing when it rotates clockwise at a preset angle; Figure 7 for Figure 2 A structural diagram from another perspective; Figure 8 It is a structural schematic diagram of the upper limit detection plate, the lower limit detection plate and the travel switch in Example 1; Fig. 9 It is a structural schematic diagram of the working platform and guardrail assembly in Example 1; Fig.10 for Fig. 9 A schematic diagram of the structure from another perspective; Fig.11 A schematic diagram of a structure in which a front guardrail or a rear guardrail is connected to a side guardrail via a latch; Fig.12 It is a structural schematic diagram of the guardrail assembly in a folded state; Fig.13 for Fig.12 A schematic diagram of the structure from another perspective; Fig.14 It is a schematic diagram showing the scissor arm frame lifting the working platform upwards in Example 2; Fig.15 It is a schematic diagram showing the scissor arm frame lifting the working platform downward in Example 2; Fig.16 This is a schematic diagram showing the horizontal lifting of the working platform by the scissor arm in Example 2.

[0018] Numbers in the figure: 1. Bracket for placing the upper control handle; 2. Working platform; 3. Scissor arm bracket; 4. Lifting cylinder; 5. Maintenance bracket; 6. Second limit assembly; 7. Support and slide; 8. Rotary mechanical limit; 9. Slewing bearing; 10. Slewing limit switch; 11. Slewing limit block; 12. Pipeline interface; 13. Guardrail assembly; 131. Front guardrail; 132. Rear guardrail; 133. Side guardrail; 14. Side door; 15. First hinge seat; 16. Latch; 17. Articulated shaft; 18. Upper limit detection plate; 19. Lower limit detection plate; 20. Travel switch. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example

[0021] Combination Figure 1, this embodiment provides a scissor-type lifting work platform device, which includes a support 7, and the support 7 is used to be installed on a base, and the base is usually arranged at a required working position. A scissor arm frame 3 is installed on the support 7, and the bottom of the scissor arm frame 3 is installed on the support 7, and a working platform 2 is installed on the top of the scissor arm frame 3. The working platform 2 is the main load-bearing component of the rotatable scissor-type mobile lifting platform device, and the scissor arm frame 3 can be driven by a power mechanism to make the working platform 2 move up and down. In a specific embodiment, the power mechanism is a lifting cylinder 4, and the extension and contraction of the lifting cylinder 4 can drive the scissor arm frame 3 to rise and fall, which is the same as the common scissor-type lifting platform in the art. In this embodiment, the working platform 2 and the support 7 are both equipped with slides to realize the lifting function of the working platform 2.

[0022] Furthermore, combined with Figure 2 and Figure 3 In this embodiment, a slewing bearing 9 is installed on the support 7, and the slewing bearing 9 is used to drive the support 7 to rotate. Specifically, in a construction site with narrow space above, such as a railway tunnel dome construction, while the lifting cylinder 4 drives the work platform 2 to rise and fall, the slewing bearing 9 can drive the support 7 and the work platform 2 to rotate to expand the range that the work platform 2 can cover in the rotation direction, and the entire lifting work platform 2 does not need to move horizontally to avoid obstacles. In this embodiment, the scissor-type scissor lift work platform device that can rotate has the basic lifting function, and by configuring the rotation function, it can further meet the use requirements of multi-directional space operations.

[0023] In addition, during the operation of the rotatable scissor-type lifting work platform device in this embodiment, since it is equipped with a rotation function, it is also necessary to limit the rotation function to avoid collision between the working platform 2 and the top obstacle due to excessive rotation, thereby causing personal or property losses.

[0024] The support 7 in this embodiment is provided with a first limit assembly, and the first limit assembly is used to limit the slewing bearing 9 to perform rotational movement within a preset angle threshold.

[0025] In a specific embodiment, the first limit assembly includes an electronic limit mechanism, which includes a rotary limit switch 10 installed on the support 7, and the rotary limit switch 10 is used to send a signal to stop the rotary support 9 from rotating when the rotary support 9 rotates to a preset angle threshold. The first limit assembly also includes a rotary mechanical limit 8, which is used to prevent the rotary support 9 from continuing to rotate when the rotary support 9 rotates to a preset angle threshold.

[0026] The rotation process of the scissor lift work platform device is explained as follows: the main structure of the scissor lift work platform device rotates within a preset rotation angle driven by the slewing bearing 9, and the rotation range is a fan-shaped area of ​​20° on each side. The rotation process of the device is shown as follows Figures 4 to 6 As shown. According to the actual working conditions, the rotation angle can be adjusted by adjusting the rotary mechanical limit 8, the slewing limit switch 10, and the slewing limit block 11. The slewing limit block 11 cooperates with the slewing limit switch 10 to allow the main structure to rotate within a preset angle range. When the main structure rotates to the set angle, the slewing limit switch 10 signal is triggered and the device stops rotating. When the slewing limit switch 10 fails, the rotary mechanical limit 8 acts as a protective structure to restrict the device from continuing to rotate. It can be understood that this embodiment can avoid the collision of the working platform 2 with obstacles in the top space during the rotation process as much as possible by limiting the slewing range.

[0027] Combination Figure 7 and Figure 8 Furthermore, a second limit assembly 6 is provided at the bottom of the scissor arm frame 3 in this embodiment, and the second limit assembly 6 is used to limit the lifting and lowering movement of the working platform 2 within a preset height range. The second limit assembly 6 includes an upper limit detection plate 18 and a lower limit detection plate 19, the upper limit detection plate 18 is used to cooperate with the travel switch 20 to identify and determine the height value of the working platform 2, and the lower limit detection plate 19 is used to cooperate with the travel switch 20 to identify and determine the lower limit height of the working platform 2.

[0028] The functional design of the upper and lower limits of lifting in this embodiment corresponds to the lower limit height and upper limit height of the lifting of the working platform 2. The upper limit height is the height when the working platform 2 reaches the specified maximum value. The lower limit height is the height when the arm spacing of the scissor arm frame 3 reaches the specified value.

[0029] The lifting up and down height limiting function in this embodiment obtains the lifting height by detecting the rotation angle of the hinge shaft 17 of the scissor arm frame 3, and specifically limits the height respectively through two groups of travel switches 20 and limit detection plates.

[0030] The lifting and lowering action process of the rotatable scissor-type lifting work platform device: the working platform 2 rises to the highest point driven by the scissor arm frame 3, and the height value is identified and judged by the upper limit detection plate 18 and the travel switch 20 to ensure that the working platform 2 is within the safe working height range; when the working platform 2 descends, the lower limit height is identified and judged by the lower limit detection plate 19 and the travel switch 20. The purpose of setting the lower limit height is to prevent the scissor arm frame 3 from pinching the hand and causing injury. When the device reaches the lower limit height, the scissor arm frame 3 pauses for 3S and then falls again.

[0031] Combination Figures 9 and 10In order to further improve the obstacle avoidance function and use flexibility of the scissor-type lifting work platform device, a guardrail assembly 13 is installed on the work platform 2 in this embodiment, and the guardrail assembly 13 includes a front guardrail 131, a rear guardrail 132 and a side guardrail 133. The front guardrail 131 is provided with an upper control handle placement bracket 1; Fig.11 The two sides of the side guardrail 133 are detachably connected to the front guardrail 131 and the rear guardrail 132 through the pins 16; the guardrail assembly 13 can be folded on the working platform 2 to reduce the height of the guardrail assembly 13.

[0032] During transportation, the height of the entire guardrail assembly 13 can be lowered by folding the guardrail assembly 13 onto the working platform 2, thereby facilitating transportation and avoiding obstacles during transportation.

[0033] In a specific embodiment, the working platform 2 is provided with a first hinge seat 15, and the first hinge seat 15 is used to be hingedly connected to the bottom end of the front guardrail 131 or the rear guardrail 132, so that the front guardrail 131 and the rear guardrail 132 can be rotated relative to the first hinge seat 15 and laid on the working platform 2. The hinge seat can be connected to the bottom end of the front guardrail 131 or the rear guardrail 132 through a pin shaft.

[0034] The working platform 2 is also provided with an arched support rod, and the bottom end of the side guardrail 133 is hinged to the top end of the support rod. Fig.12 and Fig.13 After the connection of the latch 16 is released, the front guardrail 131 and the rear guardrail 132 rotate relative to the first hinge seat 15 and are laid on the working platform 2, and then the side guardrail 133 can rotate downward relative to the top of the support rod and abut against the front guardrail 131 and the rear guardrail 132 laid on the working platform 2, so that the guardrail assembly 13 is folded. In addition, a side door 14 is provided below the side guardrail 133 of the working platform 2, and the side door 14 is located between the support rods on both sides for easy entry of personnel.

[0035] Furthermore, the scissors-type lifting work platform device also includes a maintenance bracket 5: the maintenance bracket 5 is used as a protective device, and the maintenance bracket 5 can be used to prop up the scissors structure during maintenance to avoid the risk of being squeezed when the arm falls; the scissors-type lifting work platform device in this embodiment is also provided with a pipeline interface 12, and the pipeline interface 12 is used as an interface for equipment power and control.

[0036] Example 2 This embodiment provides a method for using the scissor-type lifting work platform device in Embodiment 1: When the scissor arm frame 3 is arranged in the vertical direction, Fig.11 First, it can be lifted vertically and rotated horizontally. It can carry people or equipment to work in high-altitude areas with complex environments and narrow areas, such as repairing the dome walls of railway tunnels and maintaining high-voltage power lines.

[0037] Combination Fig.12 The working platform 2 can also be lifted downward in the vertical direction and rotated horizontally, and can carry people or equipment for in-depth operations in the lower ground area, such as mine transportation, foundation reinforcement binding, etc.

[0038] Combination Fig.13 The working platform 2 is lifted in the horizontal direction and rotated vertically, and can carry equipment to complete horizontal sweeping, dumping and other actions.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A rotatable scissor lift work platform device, characterized in that: include: Support (7), A slewing bearing (9) is mounted on the support (7), and the slewing bearing (9) is used to drive the support (7) to perform a rotational motion; A scissor arm frame (3), the bottom of which is mounted on the support (7), and a working platform (2) is mounted on the top of the scissor arm frame (3); a first limiting assembly mounted on the support (7), the first limiting assembly being used to limit the slewing bearing (9) from performing rotational movement within a preset angle threshold; A second limiting assembly (6) is mounted on the bottom of the scissor arm frame (3), and the second limiting assembly (6) is used to limit the lifting movement of the working platform (2) within a preset height range.

2. The scissor lift work platform device according to claim 1, characterized in that: It also comprises a lifting cylinder (4), wherein the lifting cylinder (4) is transmission-connected to the scissor arm frame (3) to drive the working platform (2) to perform lifting movement.

3. The scissor-type lifting work platform device according to claim 1, characterized in that: The first limit assembly comprises an electronic limit mechanism, the electronic limit mechanism comprises a slewing limit switch (10) mounted on the support (7), the slewing limit switch (10) being used to send a signal to stop the slewing support (9) from rotating when the slewing support (9) rotates to a preset angle threshold.

4. The scissor-type lifting work platform device according to claim 3, characterized in that: The first limit assembly further comprises a rotational mechanical limit (8), wherein the rotational mechanical limit (8) is used to prevent the slewing bearing (9) from continuing to rotate when the slewing bearing (9) rotates to a preset angle threshold.

5. The scissor-type lifting work platform device according to claim 4, characterized in that: The preset angle threshold is 20°.

6. The scissor lift work platform device according to claim 1, characterized in that: The second limit assembly (6) comprises an upper limit detection plate (18) and a lower limit detection plate (19) mounted on the hinge shaft (17) of the scissor arm frame (3); the upper limit detection plate (18) is used to cooperate with the travel switch (20) to identify and determine the height value of the working platform (2); and the lower limit detection plate (19) is used to cooperate with the travel switch (20) to identify and determine the lower limit height of the working platform (2).

7. The scissor lift work platform device according to claim 1, characterized in that: Also includes: A guardrail assembly (13) is installed on the working platform (2), the guardrail assembly (13) comprising a front guardrail (131), a rear guardrail (132) and a side guardrail (133), and two sides of the side guardrail (133) are detachably connected to the front guardrail (131) and the rear guardrail (132) respectively via latches (16); The guardrail assembly (13) can be folded onto the working platform (2) to lower the height of the guardrail assembly (13).

8. The scissor lift work platform device according to claim 7, characterized in that: Also includes: a first hinged seat (15) disposed on the working platform (2), the first hinged seat (15) being used for being hingedly connected to the bottom end of the front guardrail (131) or the rear guardrail (132), so that the front guardrail (131) and the rear guardrail (132) can be rotated relative to the first hinged seat (15) and laid on the working platform (2); A support rod is provided on the working platform (2), and the bottom end of the side guardrail (133) is hinged to the top end of the support rod; After the connection of the latch (16) is released, the front guardrail (131) and the rear guardrail (132) are rotated relative to the first hinge seat (15) and laid on the working platform (2), and then the side guardrail (133) can be rotated downward relative to the top end of the support rod and abut against the front guardrail (131) and the rear guardrail (132) laid on the working platform (2), so that the guardrail assembly (13) is folded.

9. The scissor lift work platform device according to claim 1, characterized in that: Also includes: A side door (14) is installed on the working platform (2) and is located below the side guardrail (133).

10. The scissor lift work platform device according to claim 1, characterized in that: Also includes: A maintenance bracket (5) is mounted on the scissor arm frame (3), and the maintenance bracket (5) is used to prop up the scissor arm frame (3) during maintenance.

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