Positioning mechanism for lifting manned platform

Abstract

The utility model relates to the technical field of manned platforms, and discloses a positioning mechanism for lifting a manned platform, which comprises a base, an electric telescopic rod arranged at the top of the base, a lifting platform arranged at the end of a piston rod of the electric telescopic rod, a plurality of universal wheels fixed at the bottom of the base through bolts, and two guide rods welded at the top of the base, through the arrangement of the L-shaped rod, the connecting frame and the force arm, the connecting frame moves downwards to drive the force arm to rotate together with the connecting rod and the L-shaped rod, so that the rotating block at one end of the L-shaped rod is in contact with the ground, the servo electric cylinder continues to contract, and the universal wheels are separated from the ground; meanwhile, the contact point of the base and the ground can be enlarged, the gravity center of the base is made to move downwards, and therefore the base is fixed more stably, and the stability of the lifting platform is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manned platforms, and more specifically to a positioning mechanism for a lifting manned platform. Background Art

[0002] When personnel need to work at height, a lifting manned platform will be used to lift the personnel to a suitable position and then stop, allowing the personnel to work at this position.

[0003] After searching, a Chinese patent document with announcement number CN210944743U discloses a manned platform for rack production. The lifting platform can be adjusted in height to facilitate the work activities of the staff, and has safety protection measures and high safety. The overall movement is convenient, it is not easy to slide and deviate, and the stability is high. However, the following defects still exist. It is fixed with a cylinder, an anti-sliding block, and a suction cup. When fixed, the anti-sliding block and the suction cup are in contact with the ground. If its moving wheels leave the ground, the contact area between the anti-sliding block, the suction cup and the ground is small, and the center of gravity is easily unstable. If the moving wheels are in contact with the ground, the friction between the anti-sliding block and the suction cup and the ground is limited, which can easily cause them to move, resulting in unstable fixation of the platform. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a positioning mechanism for a lifting manned platform to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solutions: a positioning mechanism for a lifting manned platform, comprising a base, an electric telescopic rod is provided on the top of the base, a lifting platform is provided on the piston rod end of the electric telescopic rod, a plurality of universal wheels are fixed to the bottom of the base by bolts, two guide rods are welded to the top of the base, a connecting frame is slidably connected to the circumferential outer walls of the two guide rods, a lifting device is provided at the bottom of the connecting frame, and the lifting device is fixed to the top of the base, rotating grooves are provided on both sides of the base, an L-shaped rod is rotatably connected in the rotating groove, a connecting rod is fixed between the two L-shaped rods on the same side by bolts, the top of the connecting rod is rotatably connected to two force arms, and the force arms are rotatably connected to the connecting frame, and a blocking mechanism for limiting the connecting frame is provided on the top of the base.

[0006] Furthermore, the blocking mechanism includes a fixing rod, which is welded to the top of the base. A sliding hole that passes through the fixing rod is opened on one side of the fixing rod. A limiting frame is slidably connected in the sliding hole. An inclined surface is opened on one end of the limiting frame. A tension spring is welded on one side of the limiting frame, and the other end of the tension spring is fixed to the fixing rod.

[0007] Furthermore, a pull ring for pulling the limit frame to move is welded on one side of the limit frame.

[0008] Furthermore, one end of each of the L-shaped rods is rotatably connected to a rotating block, one side of the rotating block is provided with a plurality of anti-slip grooves, and the anti-slip grooves are evenly distributed, and fixed blocks are welded at the corners of each of the L-shaped rods.

[0009] Furthermore, two avoidance grooves are provided on both sides of the base, and the force arms can be located in the avoidance grooves.

[0010] Furthermore, a plurality of multi-section telescopic rods are fixed to the top of the base by bolts, and the plurality of multi-section telescopic rods are symmetrically distributed, and the plurality of multi-section telescopic rods are all fixed to the lifting platform.

[0011] Furthermore, ladders are fixed on both sides of the lifting platform by bolts.

[0012] Furthermore, the lifting device is a servo electric cylinder.

[0013] Technical effects and advantages of the utility model:

[0014] 1. The utility model is provided with an L-shaped rod, a connecting frame and a force arm. The connecting frame moves downward, driving the power arm, the connecting rod and the L-shaped rod to rotate together, so that the rotating block at one end of the L-shaped rod contacts the ground, and the servo electric cylinder continues to contract, so that the universal wheel is out of contact with the ground, thereby completing the positioning and fixing of the manned platform. At the same time, it can expand the contact point between the base and the ground, and move the center of gravity of the base downward, so that the base is fixed more firmly, thereby improving the stability of the lifting platform.

[0015] 2. The utility model is provided with a blocking mechanism. When the connecting frame moves downward, it will squeeze the inclined surface at one end of the limit frame to move the limit frame. When the connecting frame passes over the limit frame, the limit frame will be pulled to reset by the deformed tension spring, and the limit frame will clamp the connecting frame, thereby limiting the position of the connecting frame, thereby fixing the position of the rotating block and improving the fixing effect of the manned platform.

[0016] 3. The utility model is provided with a ladder, and personnel can climb up the lifting platform via the ladder, so that personnel can easily climb up the lifting platform, reducing the strength of personnel climbing the lifting platform and improving the labor-saving property of the manned platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a partial enlarged structural schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of the enlarged structure of the fixing rod of the utility model.

[0020] The accompanying drawings are marked as follows: 1. base; 2. ladder; 3. universal wheel; 4. multi-section telescopic rod; 5. lifting platform; 6. electric telescopic rod; 7. fixed block; 8. L-shaped rod; 9. fixed rod; 10. lifting device; 11. rotating groove; 12. avoidance groove; 13. connecting rod; 14. anti-slip pattern; 15. rotating block; 16. force arm; 17. connecting frame; 18. guide rod; 19. tension spring; 20. pull ring; 21. sliding hole; 22. limit frame. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0022] Reference Figure 1-Figure 3The utility model provides a positioning mechanism for a lifting manned platform, including a base 1, an electric telescopic rod 6 is arranged on the top of the base 1, a lifting platform 5 is arranged on the piston rod end of the electric telescopic rod 6, a plurality of universal wheels 3 are fixed to the bottom of the base 1 by bolts, two guide rods 18 are welded on the top of the base 1, a connecting frame 17 is slidably connected to the circumferential outer wall of the two guide rods 18, a lifting device 10 is arranged at the bottom of the connecting frame 17, and the lifting device 10 is fixed to the top of the base 1, the lifting device 10 is a servo electric cylinder, rotating grooves 11 are arranged on both sides of the base 1, an L-shaped rod 8 is rotatably connected in the rotating groove 11, a plurality of L-shaped rods 8 are rotatably connected at one end with a rotating block 15, a plurality of anti-skid patterns 14 are arranged on one side of the rotating block 15, and the anti-skid patterns 14 are evenly distributed, the anti-skid patterns 14 can increase the friction between the rotating block 15 and the ground, and a plurality of L-shaped rods 8 are welded with fixed blocks 7 at the corners to strengthen the strength of the corners of the L-shaped rods 8 and prolong their service life. The two L-shaped rods 8 on the same side are fixed with a connecting rod 13 by bolts. The top of the connecting rod 13 is rotatably connected to two force arms 16, and the force arms 16 are rotatably connected to the connecting frame 17. A blocking mechanism for limiting the connecting frame 17 is provided on the top of the base 1. Two avoidance grooves 12 are provided on both sides of the base 1, and the force arms 16 can be located in the avoidance grooves 12, so that the rotation of the L-shaped rod 8 can reach the limit. When it is necessary to position and fix the manned platform, start the servo electric cylinder, and the servo electric cylinder will drive the connecting frame 17 to move downward, so that the force arms 16, the connecting rod 13 and the L-shaped rod 8 rotate together, and the rotating block 15 at one end of the L-shaped rod 8 contacts the ground, and the servo electric cylinder continues to contract to make the universal wheel 3 disengage from the ground, completing the positioning and fixing of the manned platform. At the same time, it can expand the contact point between the base 1 and the ground, so that the center of gravity of the base 1 moves downward, thereby making the base 1 more firmly fixed and improving the stability of the lifting platform.

[0023] Among them, the blocking mechanism includes a fixing rod 9, which is welded to the top of the base 1, and a sliding hole 21 is provided on one side of the fixing rod 9, which passes through the fixing rod 9, and a limiting frame 22 is slidably connected in the sliding hole 21. One end of the limiting frame 22 is provided with an inclined surface, and a tension spring 19 is welded on one side of the limiting frame 22, and the other end of the tension spring 19 is fixed to the fixing rod 9, and a pull ring 20 is welded on one side of the limiting frame 22 for pulling the limiting frame 22 to move. In the process of the connecting frame 17 moving downward, the connecting frame 17 will squeeze the inclined surface at one end of the limiting frame 22 to move the limiting frame 22. When the connecting frame 17 passes over the limiting frame 22, the servo electric cylinder will shrink to the limit at this time, and the limiting frame 22 will be pulled back by the deformed tension spring 19 to reset the limiting frame 22, and the limiting frame 22 will clamp the connecting frame 17, limit the connecting frame 17, thereby fixing the position of the rotating block 15 and improving the fixing effect of the manned platform.

[0024] Among them, a plurality of multi-section telescopic rods 4 are fixed to the top of the base 1 by bolts, and the plurality of multi-section telescopic rods 4 are symmetrically distributed, and the plurality of multi-section telescopic rods 4 are all fixed to the lifting platform 5, limiting the movement of the lifting platform 5 to prevent the lifting platform 5 from rotating during the lifting process, and ladders 2 are fixed to both sides of the lifting platform 5 by bolts, and personnel can climb up the lifting platform 5 through the ladders 2, so that personnel can easily climb up the lifting platform 5, reducing the strength of personnel climbing the lifting platform 5, and improving the labor-saving nature of the manned platform.

[0025] The working principle of the utility model is as follows: when it is necessary to position and fix the manned platform, the servo electric cylinder is started, and the servo electric cylinder will drive the connecting frame 17 to move downward, so that the force arm 16 rotates together with the connecting rod 13 and the L-shaped rod 8, and the rotating block 15 at one end of the L-shaped rod 8 contacts the ground, and the servo electric cylinder continues to contract, so that the universal wheel 3 is out of contact with the ground, completing the positioning and fixing of the manned platform. At the same time, it can expand the contact point between the base 1 and the ground, so that the center of gravity of the base 1 moves downward, thereby making the fixation of the base 1 more stable. In the process of the connecting frame 17 moving downward, the connecting frame 17 will squeeze the inclined surface at one end of the limit frame 22 to move the limit frame 22. When the connecting frame 17 passes over the limit frame 22, the servo electric cylinder will contract to the limit, and the limit frame 22 will be pulled back by the deformed tension spring 19, and the limit frame 22 will clamp the connecting frame 17 to limit the connecting frame 17.

[0026] Finally, a few points should be explained: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0027] In the drawings of the embodiments disclosed by the present invention, only the structures related to the embodiments disclosed by the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A positioning mechanism for a lifting manned platform, comprising a base (1), a top of the base (1) being provided with an electric telescopic rod (6), a piston rod end of the electric telescopic rod (6) being provided with a lifting platform (5), a bottom of the base (1) being fixedly connected with a plurality of universal wheels (3), characterized in that: The top of the base (1) is fixedly connected to two guide rods (18), the circumferential outer walls of the two guide rods (18) are slidably connected to a connecting frame (17), a lifting device (10) is provided at the bottom of the connecting frame (17), and the lifting device (10) is fixed to the top of the base (1), both sides of the base (1) are provided with rotation grooves (11), an L-shaped rod (8) is rotatably connected in the rotation groove (11), a connecting rod (13) is fixedly connected between the two L-shaped rods (8) located on the same side, the top of the connecting rod (13) is rotatably connected to two force arms (16), and the force arms (16) are rotatably connected to the connecting frame (17), and a blocking mechanism for limiting the connecting frame (17) is provided at the top of the base (1).

2. A positioning mechanism for a lifting and manned platform according to claim 1, characterized in that: The blocking mechanism comprises a fixing rod (9), the fixing rod (9) being fixedly connected to the top of the base (1), a sliding hole (21) penetrating the fixing rod (9) being provided on one side of the fixing rod (9), a limiting frame (22) being slidably connected in the sliding hole (21), an inclined surface being provided on one end of the limiting frame (22), a tension spring (19) being fixedly connected to one side of the limiting frame (22), and the other end of the tension spring (19) being fixed to the fixing rod (9).

3. A positioning mechanism for a lifting and manned platform according to claim 2, characterized in that: A pull ring (20) for pulling the limiting frame (22) to move is fixedly connected to one side of the limiting frame (22).

4. The positioning mechanism for a lifting and manned platform according to claim 1, characterized in that: One end of each of the plurality of L-shaped rods (8) is rotatably connected to a rotating block (15), one side of the rotating block (15) is provided with a plurality of anti-slip grooves (14), and the anti-slip grooves (14) are evenly distributed, and the corners of each of the plurality of L-shaped rods (8) are fixedly connected to a fixed block (7).

5. The positioning mechanism for a lifting and manned platform according to claim 1, characterized in that: Two avoidance grooves (12) are provided on both sides of the base (1), and the force arm (16) can be located in the avoidance groove (12).

6. The positioning mechanism for a lifting and manned platform according to claim 1, characterized in that: A plurality of multi-section telescopic rods (4) are fixedly connected to the top of the base (1), and the plurality of multi-section telescopic rods (4) are symmetrically distributed, and the plurality of multi-section telescopic rods (4) are all fixed to the lifting platform (5).

7. A positioning mechanism for a lifting and manned platform according to claim 6, characterized in that: Ladders (2) are fixedly connected to both sides of the lifting platform (5).

8. The positioning mechanism for a lifting and manned platform according to claim 1, characterized in that: The lifting device (10) is a servo electric cylinder.

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