A work platform

Abstract

The present invention relates to the technical field of engineering machinery, and in particular to a work platform. The work platform comprises a workbench, which comprises: a main platform comprising a main base plate and a main front guardrail and a main rear guardrail respectively arranged on both sides of the main base plate, with openings formed at both ends of the main base plate; and two secondary platforms, which are respectively arranged at both ends of the main base plate. The secondary platforms are foldable. When the secondary platforms are in an open state, the main platform is connected to the secondary platforms. When the secondary platforms are in a folded state, the openings at both ends of the main base plate are closed by the secondary platforms. Since the secondary platforms are foldably arranged at both ends of the main platform, they can be folded or opened as needed in different occasions to increase or decrease the working space of the workbench.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a working platform. Background Art

[0002] At present, there are more and more high-altitude work tasks, and the types of high-altitude work products involved are becoming more and more abundant. In such products, the operating platform and the high-altitude environment where the operators are located are relatively special, and certain protective measures need to be considered to ensure the safety and comfort of the operation.

[0003] The operating platforms (or operating tables) of existing work platform products are mostly formed by simply bending steel pipes, which only meet functional requirements. Furthermore, these platforms cannot be adjusted in size, resulting in a small workspace and limited application scenarios.

[0004] Therefore, there is an urgent need for an operating platform to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a work platform that can adjust the space size of the workbench according to the application scenario.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Provided is a work platform, comprising a work table, the work table comprising:

[0008] The main platform includes a main base plate and a main front guardrail and a main rear guardrail respectively provided on both sides of the main base plate, and openings are formed at both ends of the main base plate;

[0009] Two sub-platforms are respectively arranged at the two ends of the main base plate, and the sub-platforms are foldable. When the sub-platforms are in the open state, the main platform is connected to the sub-platforms. When the sub-platforms are in the folded state, the openings at both ends of the main base plate are closed by the sub-platforms.

[0010] As a preferred technical solution of the above-mentioned working platform, the auxiliary platform includes:

[0011] A secondary bottom plate, rotatably connected to the main bottom plate;

[0012] Auxiliary front guardrail, rotatably connected to the main front guardrail,

[0013] A secondary rear guardrail, rotatably connected to the main rear guardrail;

[0014] The secondary side guardrail has one end rotatably connected to the secondary rear guardrail and the other end detachably connected to the secondary front guardrail.

[0015] As a preferred technical solution for the above-mentioned working platform, first limiting structures are respectively provided at both ends of the main front guardrail and the main rear guardrail, and the first limiting structures are used to limit the auxiliary bottom plate to a vertical state.

[0016] As an optimal technical solution for the above-mentioned working platform, the first limiting structure includes a limiting block and a limiting lock. The limiting blocks are fixedly provided at both ends of the main front guardrail and the main rear guardrail, and the limiting lock can be movably provided on the main front guardrail / or the main rear guardrail.

[0017] As a preferred technical solution of the above-mentioned working platform, the limit lock includes a movable lock tongue and a fixed seat, and the movable lock tongue can be selectively extended or retracted into the fixed seat.

[0018] As a preferred technical solution of the above-mentioned working platform, a second limiting structure is provided between the main platform or the auxiliary platform, and the second limiting structure is used to limit the rotation of the auxiliary platform.

[0019] As a preferred technical solution of the above-mentioned working platform, a third limiting structure is provided on the secondary side guardrail or the secondary rear guardrail, and the third limiting structure is used to limit the rotation angle of the secondary side guardrail.

[0020] As an optimal technical solution for the above-mentioned working platform, limit pin holes are provided on the secondary front guardrail and the secondary rear guardrail. After the secondary front guardrail and the secondary rear guardrail are folded, the fourth limit structure is provided in the limit pin hole.

[0021] As an optimal technical solution for the above-mentioned working platform, the working platform also includes a machine body, a fixed frame, a swing cylinder, a swing frame, a quick-release mechanism and a weighing mechanism. The machine body is fixedly connected to the quick-release mechanism, the quick-release mechanism is clamped with the first end of the fixed frame, the second end of the fixed frame is rotatably connected to the first end of the swing frame, and the cylinder body of the swing cylinder rod is fixedly provided on the fixed frame, the cylinder of the swing cylinder is connected to the swing frame, the second end of the swing frame is connected to the main platform, and the weighing mechanism is arranged between the main platform and the swing frame.

[0022] As a preferred technical solution of the above-mentioned working platform, the swing cylinder is a piston cylinder.

[0023] Beneficial effects of the present invention:

[0024] The work platform provided by the present invention comprises a main platform, which includes a main base plate and main front and rear guardrails respectively provided on either side of the main base plate, with openings formed at both ends of the main base plate; and two foldable secondary platforms respectively provided at either end of the main base plate. When the secondary platforms are in an open state, the main platform and the secondary platforms are connected. When the secondary platforms are in a foldable state, the openings at both ends of the main base plate are closed by the secondary platforms. Since the secondary platforms are foldably provided at both ends of the main platform, they can be folded or opened as needed in different situations, thereby increasing or decreasing the workspace of the work platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the working platform provided by an embodiment of the present invention (the body is not shown in full);

[0026] Figure 2 1 is a schematic structural diagram of a quick-release mechanism provided by an embodiment of the present invention;

[0027] Figure 3 This is a structural schematic diagram of the fixed frame, the swing cylinder, and the swing frame provided by an embodiment of the present invention when the swing cylinder rotates to the first extreme position;

[0028] Figure 4 This is a structural schematic diagram of the fixed frame, the swing cylinder, and the swing frame provided by an embodiment of the present invention when the swing cylinder rotates to the second extreme position;

[0029] Figure 5 is a schematic diagram of the connection between the weighing mechanism and the workbench provided in an embodiment of the present invention;

[0030] Figure 6 is a schematic structural diagram of a workbench provided by an embodiment of the present invention;

[0031] Figure 7 This is a schematic structural diagram of a folded pair of bottom plates of a workbench provided by an embodiment of the present invention;

[0032] Figure 8 This is a partial enlarged view of the auxiliary bottom plate of the workbench provided by an embodiment of the present invention after folding;

[0033] Figure 9 1 is a schematic diagram of the structure of the auxiliary front guardrail after folding according to an embodiment of the present invention;

[0034] Figure 10 1 is a schematic diagram of the structure of the secondary side guardrail after folding according to an embodiment of the present invention;

[0035] Figure 11 This is a schematic structural diagram of a workbench with one side auxiliary platform folded, provided by an embodiment of the present invention;

[0036] Figure 12This is a schematic structural diagram of a workbench with the auxiliary platforms on both sides folded, provided by an embodiment of the present invention;

[0037] Figure 13 Schematic diagram of the positional relationship between the secondary front guardrail and the secondary rear guardrail after folding, provided by an embodiment of the present invention;

[0038] Figure 14 Schematic diagram of the positional relationship between the main platform and the auxiliary platform after deployment according to an embodiment of the present invention;

[0039] Figure 15 Schematic diagram of the positional relationship between the secondary front guardrail and the secondary side guardrail after deployment, provided by an embodiment of the present invention.

[0040] Figure 16 Schematic diagram of the positional relationship between the secondary rear guardrail and the secondary side guardrail after deployment, provided by an embodiment of the present invention.

[0041] In the picture:

[0042] 1. Work platform; 101. Platform ear plate; 11. Main platform; 111. Main base plate; 112. Main front guardrail; 113. Main rear guardrail; 12. Auxiliary platform; 121. Auxiliary base plate; 122. Auxiliary front guardrail; 1221. First stop plate; 123. Auxiliary side guardrail; 124. Auxiliary rear guardrail; 13. Lifting rod entrance; 14. Swinging door; 151. Stop block; 152. Stop lock; 16. Fourth stop structure; 17. Second stop structure; 18. Bolt; 19. Second pin; 20. Third stop structure;

[0043] 2. Fixed bracket; 201. Swing hinge; 202. Cylinder lug; 203. Quick-release shaft;

[0044] 3. Swing cylinder;

[0045] 4. Swing frame; 401. Swing frame ear plate;

[0046] 5. Weighing mechanism; 501. Tripod; 502. Weighing sensor; 503. First pin;

[0047] 6. Quick release mechanism. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0049] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0050] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0051] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0052] This embodiment provides a work platform that can adjust the size of the space according to the actual occasion to meet the use requirements of different occasions. Figure 1 As shown, the work platform comprises a work platform 1, a main frame, a fixed frame 2, a swing cylinder 3, a swing frame 4, a quick-release mechanism 6, and a weighing mechanism 5. An operator can ride on the work platform 1 to perform corresponding construction work, while the main frame is used to meet the needs of raising or lowering the work platform 1. The swing cylinder 3 and swing frame 4 cooperate to achieve horizontal rotation of the work platform 1, and the weighing mechanism 5 is used to detect the actual total weight of the work platform 1 and the load.

[0053] Among them, Figure 1 and Figure 2 As shown, the body is fixedly connected to the quick release mechanism 6, which is connected to the fixing frame 2 through a quick release shaft 203. The quick release mechanism 6 and the fixing frame 2 can be quickly disassembled by inserting or withdrawing the quick release shaft 203. The fixing frame 2 is connected to the quick release mechanism 6 to achieve the function of quick installation. Figure 2Preferably, in this embodiment, a crossbeam is provided on the fixing frame 2, serving as the hook and drag position (i.e., the locking position) of the quick release mechanism 6; the quick release shaft 203 is used to lock the relative position of the fixing frame 2 and the quick release mechanism 6; the second end of the fixing frame 2 is rotatably connected to the first end of the swing frame 4, specifically, a swing hinge 201 is provided on the fixing frame 2 for connecting to the swing frame 4. Figure 3 and Figure 4 As shown, the cylinder rod of the oscillating cylinder 3 is fixedly mounted on the fixed frame 2, and the cylinder body of the oscillating cylinder 3 is connected to the oscillating frame 4. In this embodiment, a cylinder lug 202 is also provided on the fixed frame 2, and the piston rod of the oscillating cylinder 3 is rotatably connected to the cylinder lug 202. The fixed frame 2, oscillating cylinder 3, and oscillating frame 4 together form an oscillating structure capable of achieving a ±90° oscillation range. The oscillating cylinder 3 is preferably a piston cylinder, with two piston cylinders. This allows for a smaller size, significantly reducing costs compared to the single integrated oscillating cylinder in the prior art.

[0054] The second end of the swing frame 4 is connected to the workbench 1, and a weighing mechanism 5 is provided between the workbench 1 and the swing frame 4. Figure 5 As shown, the swing frame 4 is equipped with a swing frame lug 401, and the work platform 1 is equipped with a platform lug 101. The swing frame lug 401 and the platform lug 101 are connected by two tripods 501 arranged above and below. Each tripod 501 is pivotally connected to the swing frame lug 401 and the platform lug 101, respectively, via a first pin 503. The lines connecting the four connection points form a parallelogram, ensuring a stable connection between the swing frame 4 and the work platform 1. A weighing mechanism 5 is mounted on the tripods 501. In this embodiment, the weighing mechanism 5 is a load cell 502, which is mounted on the upper tripod via bolts 18 and nuts. The sensor trigger point of the load cell 502 contacts the lower tripod. When the work platform 1 is loaded, the platform lug 101 tends to move downward. At this time, the two tripods 501 tend to squeeze each other. This squeezing force acts on the load cell 502, and the actual weight of the load is obtained through data analysis. Based on the weighing results, the machine can determine the next operation.

[0055] In order to adapt to the space requirements of the workbench 1 in different occasions, the workbench 1 in this embodiment is a foldable structure, which can increase the working space. Figure 6 、 Figure 7 and Figure 9-12As shown, in this embodiment, the workbench 1 includes a main platform 11 and two sub-platforms 12, wherein the main platform 11 includes a main base plate 111 and a main front guardrail 112 and a main rear guardrail 113 respectively arranged on both sides of the main base plate 111, and openings are formed at both ends of the main base plate 111, and the main platform 11 is arranged in a U-shaped rectangular frame structure; the two sub-platforms 12 are respectively arranged at both ends of the main base plate 111, and the sub-platforms 12 are foldable. When the sub-platforms 12 are in the open state, the main platform 11 and the sub-platforms 12 are connected. When the sub-platforms 12 are in the folded state, the openings at both ends of the main base plate 111 are closed by the sub-platforms 12, that is, the sub-platforms 12 are guardrail structures at both ends of the main platform 11 in the folded state.

[0056] Since the secondary platform 12 is the guardrail at both ends of the main platform 11 in the folded state, the secondary platform 12 can be folded from a rectangular frame structure into a plate-like structure. The secondary platform 12 includes a secondary bottom plate 121, a secondary front guardrail 122, a secondary rear guardrail 124 and a secondary side guardrail 123, wherein the secondary bottom plate 121 is rotatably connected to the main bottom plate 111, specifically, the rotatable connection is achieved through a hinge; the secondary front guardrail 122 is rotatably connected to the main front guardrail 112, and the secondary rear guardrail 124 is rotatably connected to the main rear guardrail 113; one end of the secondary side guardrail 123 is rotatably connected to the secondary rear guardrail 124, and the other end is detachably connected to the secondary front guardrail 122. The secondary front guardrail 122 and the main front guardrail 112, the secondary rear guardrail 124 and the main rear guardrail 113, and the secondary side guardrail 123 and the secondary rear guardrail 124 are all rotatably connected by bolts 18 and nuts, wherein the nuts are double-nut structures to prevent loosening. Figure 15 As shown, the secondary side guardrail 123 and the secondary front guardrail 122 are detachably connected via a second pin shaft 19 .

[0057] When the secondary front guardrail 122 is open, it is coplanar with the primary front guardrail 112. The secondary bottom plate 121 rotates from a horizontal position to a vertical position, sealing the open end of the main platform 11. After the secondary front guardrail 122 and secondary side guardrails 123 are removed, the secondary front guardrail 122 is rotated 90° and positioned perpendicular to the primary front guardrail 112. The secondary side guardrail 123 is rotated 90° and positioned parallel to the secondary rear guardrail 124. The secondary rear guardrail 124 and the secondary side guardrail 123 are then rotated 90° together and positioned parallel to the secondary front guardrail 122. The secondary platform 12 is now folded.

[0058] After the secondary platform 12 is folded, the secondary front guardrail 122 and the secondary rear guardrail 124 may be opened during the movement in an unconstrained state. Therefore, in this embodiment, the secondary front guardrail 122 and the secondary rear guardrail 124 are provided with limit pin holes. After the secondary front guardrail 122 and the secondary rear guardrail 124 are folded, the fourth limit structure 16 is set in the limit pin holes. The fourth limit structure 16 is a limit pin. Of course, in other embodiments, the fourth limit structure 16 can also be other structures, which will not be repeated here. Figure 13 The secondary front guardrail 122 is provided with a first limiting plate 1221, and a limiting pin hole is provided on the first limiting plate 1221. The first limiting plate 1221 is arranged parallel to the secondary bottom plate 121 and extends outward from the secondary front guardrail 122. A second limiting plate is provided at the connection between the secondary rear guardrail 124 and the secondary side guardrail 123, wherein a limiting pin hole is provided on the second limiting plate. When the secondary front guardrail 122 and the secondary rear guardrail 124 are folded, the limiting pin hole on the second limiting plate can overlap with the limiting pin hole on the first limiting plate 1221, so that the fourth limiting structure 16 can pass through the limiting pin holes located on the first limiting plate 1221 and the second limiting plate, thereby limiting the position of the secondary front guardrail 122 and the secondary rear guardrail 124.

[0059] After the auxiliary bottom plate 121 is folded, if the external thrust is too large, the auxiliary front guardrail 122 will rotate excessively, affecting the space usage of the main platform 11. In addition, in the folded unconstrained state, the auxiliary bottom plate 121 will be shaken and opened. For this reason, in this embodiment, a first limiting structure is provided at both ends of the main front guardrail 112 and the main rear guardrail 113. The first limiting structure is used to limit the auxiliary bottom plate 121 to a vertical state. Preferably, as Figure 8 As shown, in this embodiment, the first limiting structure includes a limiting block 151 and a limiting lock 152. The limiting blocks 151 are fixedly provided at both ends of the main front guardrail 112 and the main rear guardrail 113, and the limiting lock 152 is movably provided on the main front guardrail 112 and / or the main rear guardrail 113. Preferably, the limiting lock 152 is provided on the main front guardrail 112, and the secondary platform 12 is locked using a single limiting lock 152. Of course, in other embodiments, two limiting locks can be used. However, using both limiting locks 152 requires unlocking them simultaneously in order to lower the secondary platform 12, which is inconvenient.

[0060] More specifically, the limit lock 152 includes a movable lock tongue and a fixed seat. The movable lock tongue can selectively extend or retract into the fixed seat. When the auxiliary bottom plate 121 is folded, it squeezes the movable lock tongue, which then retracts into the fixed seat. The auxiliary bottom plate 121 is restrained by the limit block 151, and the lock tongue extends. The auxiliary bottom plate 121 is restrained from both sides by the limit lock 152 and the limit block 151. When the auxiliary bottom plate 121 needs to be opened, an external force pushes the lock tongue into the fixed seat, and the auxiliary bottom plate 121 rotates to a horizontal position.

[0061] In this embodiment, if Figure 14 and Figure 15 As shown, to prevent the secondary front guardrail 122 and the secondary rear guardrail 124 of the secondary platform 12 from rotating excessively, a second limiting structure 17 is provided between the main platform 11 or the secondary platform 12. The second limiting structure 17 is used to limit the rotation angle of the secondary platform 12. The second limiting structure 17 is a limiting post, and both the secondary front guardrail 122 and the secondary rear guardrail 124 are provided with a limiting post at the connection point with the main platform 11.

[0062] In this embodiment, in order to prevent the secondary side guardrail 123 from rotating excessively after opening, a third limiting structure is provided on the secondary side guardrail 123 or the secondary rear guardrail 124. Figure 16 As shown, the third limiting structure is used to limit the rotation angle of the secondary side guardrail 123. The third limiting structure is specifically provided at the bottom of the secondary side guardrail 123. The third limiting structure can be a third limiting plate, which is provided along the length direction of the secondary side guardrail 123 and extends out of the secondary side guardrail 123. When the secondary side guardrail 123 and the secondary rear guardrail 124 are at 90 degrees, the third limiting plate abuts the secondary side guardrail 123.

[0063] like Figure 6 and Figure 7 As shown, in this embodiment, the work platform 1 is provided with three entrances, wherein a lifting rod entrance 13 is provided on the main front guardrail 112 of the main platform 11, a lifting rod entrance 13 is provided on the secondary side guardrail 123 of one of the secondary platforms 12, and a rotating door 14 is provided on the secondary side guardrail 123 of another secondary platform 12, to facilitate the entry and exit of personnel and goods.

[0064] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A work platform, comprising a work table (1), characterized in that: The workbench (1) comprises: The main platform (11) comprises a main bottom plate (111) and a main front guardrail (112) and a main rear guardrail (113) respectively arranged on both sides of the main bottom plate (111), and openings are formed at both ends of the main bottom plate (111); Two auxiliary platforms (12), the two auxiliary platforms (12) are respectively arranged at the two ends of the main bottom plate (111), the auxiliary platforms (12) are foldable, when the auxiliary platforms (12) are in an open state, the main platform (11) is connected to the auxiliary platforms (12), when the auxiliary platforms (12) are in a folded state, the openings at both ends of the main bottom plate (111) are closed by the auxiliary platforms (12); The secondary platform (12) comprises: A secondary bottom plate (121) rotatably connected to the main bottom plate (111); A secondary front guardrail (122) is rotatably connected to the main front guardrail (112), A secondary rear guardrail (124) rotatably connected to the primary rear guardrail (113); A secondary side guardrail (123), one end of which is rotatably connected to the secondary rear guardrail (124), and the other end of which is detachably connected to the secondary front guardrail (122); The secondary front guardrail (122) is arranged coplanar with the main front guardrail (112) in the open state, and the secondary bottom plate (121) is rotated from a horizontal state to a vertical state. At this time, the secondary bottom plate (121) blocks the open end of the main platform (11). When the secondary front guardrail (122) and the secondary side guardrail (123) are disassembled, the secondary front guardrail (122) is rotated 90° and arranged in a vertical state with the main front guardrail (112); the secondary side guardrail (123) is rotated 90° and arranged parallel to the secondary rear guardrail (124), and then the secondary rear guardrail (124) and the secondary side guardrail (123) are rotated 90° together and arranged parallel to the secondary front guardrail (122). At this time, the secondary platform (12) is folded. The main front guardrail (112) and the main rear guardrail (113) are respectively provided with first limiting structures at both ends, and the first limiting structures are used to limit the auxiliary bottom plate (121) to a vertical state; A second limiting structure (17) is provided between the main platform (11) or the auxiliary platform (12), and the second limiting structure (17) is used to limit the rotation of the auxiliary platform (12); A third limiting structure (20) is provided on the secondary side guardrail (123) or the secondary rear guardrail (124), and the third limiting structure (20) is used to limit the rotation angle of the secondary side guardrail (123); The secondary front guardrail (122) and the secondary rear guardrail (124) are both provided with limiting pin holes. After the secondary front guardrail (122) and the secondary rear guardrail (124) are folded, the fourth limiting structure (16) is provided in the limiting pin holes.

2. The working platform according to claim 1, characterized in that: The first limiting structure comprises a limiting block (151) and a limiting lock (152); the limiting blocks (151) are fixedly provided at both ends of the main front guardrail (112) and the main rear guardrail (113); and the limiting lock (152) is movably provided on the main front guardrail (112) and / or the main rear guardrail (113).

3. The working platform according to claim 2, characterized in that: The limit lock (152) comprises a movable lock tongue and a fixed seat, and the movable lock tongue can selectively extend or retract into the fixed seat.

4. The working platform according to claim 1, characterized in that: The working platform further comprises a machine body, a fixed frame (2), a swinging oil cylinder (3), a swinging frame (4), a quick release mechanism (6) and a weighing mechanism (5); the machine body is fixedly connected to the quick release mechanism (6); the quick release mechanism (6) is clamped with the first end of the fixed frame (2); the second end of the fixed frame (2) is rotatably connected to the first end of the swinging frame (4); the cylinder rod of the swinging oil cylinder (3) is fixedly arranged on the fixed frame (2); the cylinder body of the swinging oil cylinder (3) is connected to the swinging frame (4); the second end of the swinging frame (4) is connected to the main platform (11); and the weighing mechanism (5) is arranged between the main platform (11) and the swinging frame (4).

5. The working platform according to claim 4, characterized in that: The swing cylinder (3) is a piston cylinder.

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