Movable operation platform

Abstract

The utility model discloses a movable working platform. The working platform comprises a working platform support with moving rollers arranged on the lower portion, a working platform is arranged on the upper portion of the working platform support, at least four height-adjustable height adjusting devices are arranged on the upper portion of the working platform support, and the working platform is arranged on the upper portions of the height adjusting devices. Four lengthening rods capable of extending in four directions are arranged at the lower end of the work platform support, the extending directions of every two adjacent lengthening rods are perpendicular to each other, one end of each lengthening rod is movably connected with the work platform support, the other end of each lengthening rod is in threaded connection with a vertical adjusting screw rod, the upper end of each adjusting screw rod is connected with an adjusting hand wheel, and the lower end of each adjusting screw rod is connected with an adjusting handle. The lower ends of the adjusting screws are connected with supporting legs. By means of the four lengthening rods 5 capable of extending in the four directions, the supporting area of the bottom of the work platform support can be enlarged, the overall stability of the movable work platform is improved, and the height of the work platform can be conveniently adjusted by arranging the height adjusting device.

Description

Technical Field

[0001] The utility model relates to a working platform, in particular to a mobile working platform. Background Art

[0002] At present, mobile work platforms are generally used as platforms with a height of more than 2 meters to facilitate personnel to carry out mobile equipment maintenance and other operations. They are generally made into vertical platform structures, and mobile rollers are installed at the bottom of the platform to facilitate mobile operations. However, the bottom plane area of ​​the mobile work platform is relatively small, and its height is relatively high, and its overall stability is poor, with the risk of overturning, which affects the safety of workers. In addition, the height of existing mobile work platforms is often not adjustable, which is not convenient for docking of the work platform. Utility Model Content

[0003] In view of the above-mentioned defects existing in the prior art, the utility model provides a mobile working platform which has a simple structure, high overall stability and can be easily connected to the working platform.

[0004] The utility model is realized through the following technical scheme: a mobile working platform, including a working platform bracket, a movable roller is arranged at the lower end of the working platform bracket, and a working platform is arranged on the upper part of the working platform bracket, and its characteristics are: at least four height-adjustable height adjustment devices are arranged on the upper part of the working platform bracket, and the working platform is arranged on the upper part of the height adjustment device; four extension rods which can be extended in four directions respectively are arranged at the lower end of the working platform bracket, and the extension directions of two adjacent extension rods are perpendicular to each other, one end of the extension rod is movably connected to the working platform bracket, and the other end of the extension rod is threadedly connected with a vertical adjusting screw, the upper end of the adjusting screw is connected with an adjusting handwheel, and the lower end of the adjusting screw is connected with a supporting foot.

[0005] In the utility model, the height adjustment device provided on the upper part of the working platform bracket can adjust the height of the working platform, and can meet the appropriate adjustment of the working platform docking. The four extension rods provided at the lower end of the working platform bracket can extend in four directions, which can expand the supporting area of ​​the bottom of the working platform bracket. By rotating the adjustment screw connected to the end of the extension rod, the support foot at the lower end of the adjustment screw can be driven to rise and fall, so that the support foot can be supported on the ground or raised. When the support foot is supported on the ground, the working platform bracket can be supported, and at the same time, the movement of the moving roller can be avoided, so as to achieve the stability of the entire mobile working platform and facilitate the implementation of the operation. When the support foot is raised, the entire mobile working platform can be moved.

[0006] Furthermore, the height adjustment device includes an oil storage chamber, a first plunger cylinder, and a second plunger cylinder. The first plunger cylinder is located outside the oil storage chamber, the second plunger cylinder is arranged in the oil storage chamber, and the plunger of the second plunger cylinder extends out of the top of the oil storage chamber. The bottom end of the first plunger cylinder is connected to the oil storage chamber and the second plunger cylinder through oil circuits, respectively. One-way opening switches are respectively provided on the two oil circuits. An operating handle is connected to the plunger of the first plunger cylinder. An oil pressure control valve assembly is provided in the second plunger cylinder. A reset oil circuit connected to the oil storage chamber is also provided at the bottom end of the second plunger cylinder. A one-way throttle valve is provided on the reset oil circuit, and the one-way throttle valve is connected to the reset bolt. The plunger of the first plunger cylinder can be controlled to move up and down by the operating handle. When the working platform needs to rise, the operating handle is pressed down. At this time, the switch on the oil circuit connecting the first plunger cylinder and the oil storage chamber is closed, the one-way throttle valve on the reset oil circuit is closed, and the switch on the oil circuit connecting the first plunger cylinder and the second plunger cylinder is opened. The hydraulic oil enters the second plunger cylinder. Under the action of the oil pressure control valve assembly, the plunger of the second plunger cylinder rises, and the working platform also rises accordingly; when the working platform needs to be lowered, the operating handle is lifted up. At this time, the first plunger The switch on the oil circuit connecting the cylinder and the oil storage chamber is turned on, the one-way throttle valve on the reset oil circuit is turned on, the switch on the oil circuit connecting the first plunger cylinder and the second plunger cylinder is turned off, and the hydraulic oil enters the first plunger cylinder from the second plunger cylinder through the oil storage chamber along the oil circuit connecting the first plunger cylinder and the oil storage chamber. Under the action of the oil pressure control valve assembly, the plunger of the second plunger rod descends, and the working platform also descends accordingly; in the non-working state, the reset bolt is unscrewed, the one-way throttle valve is fully opened, the hydraulic oil flows back to the oil storage chamber, and the oil pressure is unloaded and restored to its original position. The descent speed and descent height of the working platform can be controlled by controlling the opening of the one-way throttle valve on the reset oil circuit.

[0007] Furthermore, eight sleeves are fixed on the outside of the four frame sides of the bottom frame of the work platform support, and each frame side has two sleeves. The axis of the sleeve is consistent with the length direction of the frame side to which it is fixed, and four extension rods are respectively inserted into the corresponding sleeves. The four extension rods can slide in the sleeves, and the extension rods can be pulled outward to a corresponding length according to the support needs, and then the support legs can be extended and supported on the ground by rotating the adjustment screw. After the construction work is completed, the extension rods can be retracted back into the sleeves.

[0008] Furthermore, to ensure reliable connection between the extension rod and the work platform bracket, multiple pin holes are provided on the frame edges of the bottom frame of the extension rod and the work platform bracket, and the extension rod and the frame edge of the bottom frame of the work platform bracket are fixed by pins. After the extension rod is pulled out to a corresponding length according to the work requirements, the corresponding pin hole is selected by the pin to be fixed to the work platform bracket.

[0009] Furthermore, four extension rods are rotatably connected to the four corner ends of the bottom frame of the work platform support. A pin hole is provided on the frame edge of the bottom frame of the work platform support. The extension rods are fixed to the frame edge of the bottom frame of the work platform support through the pin. During construction, one end of the extension rod connected to the adjusting screw can be rotated 90 degrees outward and then unfolded, and the other end thereof is fixed to the frame edge of the bottom frame of the work platform support through the pin. After the four extension rods are rotated and fixed, an enlarged support surface can be formed, which can improve the overall stability of the mobile work platform. After the construction is completed, each extension rod is rotated inward and folded to the side of the bottom frame of the work platform support. It is fixed to the frame edge of the bottom frame of the work platform support through the pin to reduce the floor space.

[0010] Furthermore, four extension rods are rotatably connected to the four corner ends of the bottom frame of the work platform support. The four frame edges of the bottom frame of the work platform support are all provided with pin holes and short sleeves that are slidably sleeved on the frame edges. The short sleeves have sleeve holes that can be matched with the extension rods. The extension rods can be fixed to the frame edge of the bottom frame of the work platform support through the pins and the short sleeves. During construction, one end of the extension rod connected to the adjustment screw can be rotated 90 degrees outward and then unfolded, and the other end thereof is inserted into the sleeve hole of the short sleeve, and is fixed to the frame edge of the bottom frame of the work platform support through the short sleeve. After the four extension rods are rotated and fixed, an enlarged support surface can be formed, which can improve the overall stability of the mobile work platform. After the construction is completed, each extension rod is rotated inward, folded on the side of the bottom frame of the work platform support, and fixed to the frame edge of the bottom frame of the work platform support through the pins, which can reduce the floor space.

[0011] Furthermore, in order to ensure construction safety, safety railings are installed around the working platform.

[0012] The beneficial effects of the utility model are as follows: the utility model has a simple structure, and the height of the working platform can be adjusted by arranging a height adjustment device on the upper part of the working platform bracket, which can meet the appropriate adjustment of the working platform docking and facilitate construction operations; by arranging four extension rods that can extend in four directions at the lower end of the working platform bracket, the bottom support area of ​​the working platform bracket can be expanded, the overall stability of the mobile working platform can be improved, and the construction safety can be ensured. The four extension rods can be retracted or folded when not in use, which can reduce the floor space and is also convenient for movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 yes Figure 1 AA schematic diagram in;

[0015] Figure 3 yes Figure 1 An enlarged schematic diagram of part B in FIG.

[0016] Figure 4 It is a schematic diagram of the second connection structure between the extension rod and the work platform bracket in the utility model;

[0017] Figure 5 It is a schematic diagram of the third connection structure between the extension rod and the work platform bracket in the utility model;

[0018] Figure 6 yes Figure 5 Schematic diagram of the connection between the short and medium sleeves and the extension rod;

[0019] Figure 7 It is a structural schematic diagram of the height adjustment device in the utility model;

[0020] Figure 8 It is another structural schematic diagram of the height adjustment device in the utility model;

[0021] In the figure, 1. safety guardrail, 2. working platform, 3. height adjustment device, 4. working platform bracket, 5. extension rod, 6. moving roller, 7. adjusting hand wheel, 8. adjusting screw, 9. adjusting nut, 10. supporting foot, 11. sleeve, 12. pin I, 13. pin II, 14. hinge, 15. short sleeve,

[0022] 3-1, reset bolt, 3-2, oil pressure control valve assembly, 3-3, plunger of the second plunger cylinder, 3-4, second plunger cylinder, 3-5, operating handle, 3-6, first plunger cylinder, 3-7, plunger of the first plunger cylinder, 3-8, suction port, 3-9, discharge port, 3-10, hydraulic oil, 3-11, oil storage chamber, 3-12, one-way throttle valve, 3-13, base, 3-14, one-way valve I, 3-15, one-way valve II;

[0023] 4-1. Bottom frame of the working platform bracket. DETAILED DESCRIPTION

[0024] The present invention is further described below by way of non-limiting embodiments and in conjunction with the accompanying drawings:

[0025] As shown in the accompanying drawings, a mobile work platform includes a work platform bracket 4, a work platform 2 is arranged on the upper part of the work platform bracket 4, and movable rollers 6 are respectively arranged at the four corners of the lower end of the work platform bracket 4. Four or more height-adjustable height adjustment devices 3 are arranged on the upper part of the work platform bracket 4, and the work platform 2 is arranged on the upper part of the height adjustment device 3. The height adjustment device 3 is used to adjust the height of the upper work platform 2. The work platform bracket 4 is a rectangular frame structure made of square steel pipes, and cross braces are arranged between the square steel pipes for fixing. The work platform 2 can also be made of square steel pipes. In order to ensure construction safety, safety guardrails 1 are arranged around the work platform 2. The lower end of the work platform bracket 4 is provided with four extension rods 5 which can be extended in four directions respectively. The extension directions of two adjacent extension rods 5 are perpendicular to each other. One end of the extension rod 5 can be movably connected to the work platform bracket 4. The other end of the extension rod 5 is threadedly connected with a vertical adjustment screw 8 through an adjustment nut 9 fixedly connected thereto. The upper end of the adjustment screw 8 is connected with an adjustment hand wheel 7, and the lower end of the adjustment screw 8 is connected with a support foot 10. The four extension rods 5 can be extended in four directions to expand the support area at the bottom of the work platform bracket. By rotating the adjustment screw 8 by adjusting the hand wheel 7, the support foot 10 at the lower end of the adjustment screw 8 can be driven to rise and fall. When the support foot 10 is supported on the ground, it can support the work platform bracket and avoid the movement of the moving roller, thereby achieving the stability of the entire mobile work platform and facilitating the implementation of the work. When the support foot 10 is raised, the entire mobile work platform can be moved.

[0026] There are three structural forms of connection between the extension rod 5 and the work platform bracket 4 in the utility model.

[0027] As attached Figure 3 The first connection structure is shown. Eight sleeves 11 are fixed to the outside of the four frame sides of the bottom frame 4-1 of the work platform bracket 4. Each frame side has two sleeves 11. The axis of the sleeve 11 is consistent with the length direction of the frame side to which it is fixed. The sleeve 11 can cooperate with the extension rod 5. The four extension rods 5 are respectively inserted into the corresponding sleeves 11, and the two adjacent extension rods 5 are perpendicular to each other. The four extension rods 5 can all slide in the sleeves. The extension rods 5 can be pulled outward to a corresponding length according to the support needs, and then the adjusting screw 8 is turned by adjusting the hand wheel 7 to make the support foot 10 extend and support on the ground. The four extension rods 5 extend in four directions respectively, which can expand the support area at the bottom of the work platform bracket and improve the overall stability of the mobile work platform. After the construction work is completed, the extension rod 5 can be retracted back into the sleeve 11. Two sleeves 11 are arranged on the side of each frame. On the one hand, sleeves 11 at different positions can be selected to cooperate with the extension rod 5 according to the support requirements. On the other hand, the extension rod 5 can be fixed by the second sleeve 11 when it is retracted.

[0028] To ensure a reliable connection between the extension rod 5 and the work platform bracket 4, a plurality of pin holes are provided on the frame edges of the extension rod 5 and the bottom frame 4-1 of the work platform bracket 4. During construction, the extension rod 5 and the frame edge of the bottom frame 4-1 of the work platform bracket 4 can be fixed by pins.

[0029] As attached Figure 4 The second connection structure is shown. The four corners of the bottom frame 4-1 of the work platform bracket 4 are respectively provided with hinges 14, and the four extension rods 5 are rotatably connected to the four corners of the bottom frame 4-1 of the work platform bracket 4 through hinges. The position where the extension rod 5 is connected to the hinge 14 is left at a certain length from the end of the extension rod 5. The extension rod 5 can rotate around the hinge point. In the working state, the extension rod 5 is rotated 90° from the position C in the figure to the position D parallel to the ground. The end of the extension rod 5 is provided with a pin hole, and the end of the extension rod 5 can be fixed to the frame edge of the bottom frame 4-1 of the work platform bracket 4 through the pin II 13. The frame edge of the bottom frame 4-1 of the work platform bracket 4 is provided with a corresponding pin hole. When the extension rod 5 is not in use, it can be folded up and fixed to the frame edge of the bottom frame 4-1 of the work platform bracket 4 with a pin shaft Ⅰ12. Corresponding pin shaft holes are provided on the frame edges of the extension rod 5 and the bottom frame of the work platform bracket.

[0030] As attached Figure 5 The third connection structure is shown. The third connection structure is basically the same as the second connection structure, except that after the extension rod 5 rotates 90°, the end thereof is fixed to the frame edge of the bottom frame 4-1 of the work platform support 4 by a short sleeve 15. The short sleeve 15 is slidably mounted on the frame edge of the bottom frame 4-1 of the work platform support 4. The side of the short sleeve 15 has a mounting hole that can be matched with the extension rod 5. After the extension rod 5 rotates 90°, the frame edge of the bottom frame 4-1 of the work platform support 4 is mounted on the extension rod and moved toward the extension rod, so that the end of the extension rod 5 is mounted in the mounting hole on the side of the short sleeve 15, thereby fixing the extension rod 5. When the extension rod 5 is not used at ordinary times, the extension rod 5 can be folded up and fixed to the frame edge of the bottom frame 4-1 of the work platform support 4 by the pin Ⅰ12.

[0031] The height adjustment device 3 in the utility model is used to adjust the height of the upper working platform 2, and it can adopt various height adjustment mechanisms in the prior art, such as a thread adjustment mechanism. The structure of the height adjustment device 3 in this embodiment is: Figure 7As shown, it includes a base 3-13, an oil storage chamber 3-11, a first plunger cylinder 3-6, and a second plunger cylinder 3-4. The first plunger cylinder 3-6 and the oil storage chamber 3-11 are both arranged on the base 3-13, the first plunger cylinder 3-6 is located outside the oil storage chamber 3-11, the second plunger cylinder 3-4 is arranged in the oil storage chamber 3-11, and the plunger 3-3 of the second plunger cylinder 3-4 extends out of the top of the oil storage chamber 3-11, and the bottom end of the first plunger cylinder 3-6 is provided with a suction port 3-8 and a discharge port 3-9. The suction port is connected to the oil storage chamber 3-11 through an oil circuit provided in the base 3-13. The suction port 3-8 is a one-way suction port with a ball inside. Through the cooperation of the ball and the suction port, the hydraulic oil can only flow into the first plunger cylinder 3-6 in one direction. The discharge port 3-9 is connected to the second plunger cylinder 3-4 through an oil circuit provided in the base 3-13. The discharge port 3-9 is a one-way discharge port with a ball inside. Through the cooperation of the ball and the discharge port, the hydraulic oil can only flow out of the first plunger cylinder 3-6 in one direction. The plunger 3-7 of the first plunger cylinder 3-6 is connected to an operating handle 3-5. One end of the operating handle 3-5 is hinged to the outer side of the first plunger cylinder 3-6. The plunger 3-7 of the first plunger cylinder 3-6 can be operated by the operating handle 3-5. An oil pressure control valve assembly 3-2 is arranged in the second plunger cylinder 3-4, a reset oil circuit connecting the bottom end of the second plunger cylinder 3-4 with the oil storage chamber 3-11 is arranged in the base 3-13, a one-way throttle valve 3-12 is arranged on the reset oil circuit, and the one-way throttle valve 3-12 is connected to the reset bolt 3-1.

[0032] The plunger 3-7 of the first plunger cylinder 3-6 can be controlled to move up and down by the operating handle 3-5. When the working platform 2 needs to rise, the operating handle 3-5 is pressed down manually or by foot. At this time, the suction port 8 of the first plunger cylinder is closed, the one-way throttle valve 3-12 on the reset oil circuit is closed, the discharge port 3-9 of the first plunger cylinder is opened, and the hydraulic oil enters the second plunger cylinder 3-4. Under the action of the oil pressure control valve assembly 3-2, the plunger 3-3 of the second plunger cylinder 3-4 rises, and the working platform 2 also rises accordingly; when the working platform 2 needs to be lowered, the operating handle 3-5 is lifted up manually or by foot. At this time, the first plunger cylinder 3-6 is lowered. The suction port 8 of the plunger cylinder is opened, the one-way throttle valve 3-12 on the reset oil circuit is opened, and the discharge port 3-9 of the first plunger cylinder is closed. The hydraulic oil enters the first plunger cylinder 3-6 from the second plunger cylinder 3-4 through the oil storage chamber 3-11 along the oil circuit connecting the first plunger cylinder 3-6 and the oil storage chamber 3-11. Under the action of the oil pressure control valve assembly 3-2, the plunger 3-3 of the second plunger cylinder 3-4 descends, and the working platform 2 also descends accordingly; in the non-working state, the reset bolt 3-1 is unscrewed, the one-way throttle valve 3-12 is fully opened, the hydraulic oil flows back to the oil storage chamber 3-11, and the oil pressure is unloaded and restored to its original position.

[0033] The height adjustment device 3 in the utility model can also be adopted as shown in the attached Figure 8 The structure shown in the figure is similar to the structure in the attached Figure 7The structures shown are basically the same, except that: Figure 8 In the structure shown, the original suction port 8 and the ball are replaced by a one-way valve I, and the original discharge port 9 and the ball are replaced by a one-way valve II, and the flow direction of the hydraulic oil is controlled by the one-way valve I and the one-way valve II.

[0034] The utility model can conveniently adjust the height of the work platform 2 through the height adjustment device 3, which can meet the appropriate adjustment of the work platform docking and facilitate construction work; by arranging four extension rods 5 that can extend in four directions at the lower end of the work platform bracket 4, the bottom support area of ​​the work platform bracket can be expanded, the overall stability of the mobile work platform can be improved, and the construction safety can be ensured. The four extension rods can be retracted or folded when not in use, which can reduce the floor space and facilitate movement.

[0035] The other parts of this embodiment are all prior art and will not be described in detail here.

Claims

1. A mobile work platform, comprising a work platform bracket, a movable roller is arranged at the lower end of the work platform bracket, and a work platform is arranged at the upper part of the work platform bracket, wherein: At least four height-adjustable height adjustment devices are arranged on the upper part of the working platform bracket, and the working platform is arranged on the upper part of the height adjustment device; four extension rods which can be extended in four directions respectively are arranged at the lower end of the working platform bracket, and the extension directions of two adjacent extension rods are perpendicular to each other, one end of the extension rod is movably connected to the working platform bracket, and the other end of the extension rod is threadedly connected with a vertical adjusting screw, the upper end of the adjusting screw is connected with an adjusting handwheel, and the lower end of the adjusting screw is connected with a support foot.

2. The mobile work platform according to claim 1, characterized in that: The height adjustment device includes an oil storage chamber, a first plunger cylinder, and a second plunger cylinder. The first plunger cylinder is located outside the oil storage chamber, the second plunger cylinder is arranged in the oil storage chamber, and the plunger of the second plunger cylinder extends out of the top of the oil storage chamber. The bottom end of the first plunger cylinder is connected with the oil storage chamber and the second plunger cylinder through oil circuits, respectively. One-way open switches are respectively arranged on the two oil circuits. An operating handle is connected to the plunger of the first plunger cylinder. An oil pressure control valve assembly is arranged in the second plunger cylinder. A reset oil circuit connected with the oil storage chamber is also arranged at the bottom end of the second plunger cylinder. A one-way throttle valve is arranged on the reset oil circuit, and the one-way throttle valve is connected to the reset bolt.

3. The mobile work platform according to claim 1 or 2, characterized in that: Eight sleeves are fixed to the outer sides of the four frame sides of the bottom frame of the work platform support, each frame side has two sleeves, the axis of the sleeve is consistent with the length direction of the frame side fixed thereto, and four extension rods are respectively inserted into the corresponding sleeves.

4. The mobile work platform according to claim 3, characterized in that: A plurality of pin holes are arranged on the frame edges of the extension rod and the bottom frame of the work platform bracket, and the extension rod and the frame edge of the bottom frame of the work platform bracket are fixed by pins.

5. The mobile work platform according to claim 1 or 2, characterized in that: Four extension rods are rotatably connected to the four corner ends of the bottom frame of the working platform bracket. A pin hole is provided on the frame edge of the bottom frame of the working platform bracket. The extension rods are fixed to the frame edge of the bottom frame of the working platform bracket through the pin.

6. The mobile work platform according to claim 1 or 2, characterized in that: Four extension rods are rotatably connected to the four corner ends of the bottom frame of the working platform bracket. The four frame sides of the bottom frame of the working platform bracket are provided with pin holes and short sleeves slidably mounted on the frame sides. The short sleeves have mounting holes that can cooperate with the extension rods. The extension rods can be fixed to the frame sides of the bottom frame of the working platform bracket through pins and short sleeves.

7. The mobile work platform according to claim 1 or 2, characterized in that: There are safety guardrails around the working platform.

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