CN101205761A - Lifting device for aerial work platform - Google Patents

Abstract

The invention is a lifting device for an aerial work platform, which consists of a main lifting mechanism (1) and an auxiliary lifting mechanism (2). Both the main lifting mechanism and the auxiliary lifting mechanism comprise a main hook mechanism (4) and an auxiliary hook mechanism (5). One side of the hook body (6) is a hypotenuse, and the limit block (9) and the cam disc (7) are installed on the hook body; The piston rod is nested and connected and fits freely. There is a lock hole on the cam disc (7), insert the lock pin (15) into the lock hole, the relative rotation of the cam disc (7) and the hook body (6) can be locked; The bottom hangs down naturally, and realizes the displacement of the whole hook mechanism respectively in conjunction with the hypotenuse on the hook body (6) top. The invention overcomes the disadvantages of complex climbing equipment, difficult operation, limited use function and large number of attachment devices in the prior art, and has the characteristics of high reliability, simple operation and low cost.

Description

Lifting device for aerial work platform

(1) Technical field

The invention relates to a lifting device for an aerial work platform.

(2) Background technology

At present, in the self-climbing aerial work platform, the guide rail guide seat type hydraulic climbing device is mainly used. The device requires the operating platform to pre-embed casings on the building wall under construction before climbing, and install wall-through bolts and climbing attachments after the concrete reaches a certain strength (generally 10Mpa). When climbing, it is completed in two steps, first operate the climbing H-shaped guide rail, and then climb the operating platform. By analyzing the existing climbing device, it is not difficult to find its existing problems and defects:

(1) The climbing principle and climbing process are complicated, which makes the climbing operation of the whole equipment complicated.

(2) The existing climbing device is only conducive to the rising and climbing of the platform equipment, that is, it is suitable for the construction condition of the main body of the building structure, and is not conducive to the descending operation of the equipment, which corresponds to the external decoration condition of the building structure. Therefore, the use function of the main equipment is greatly restricted or limited. For example, when carrying out exterior decoration construction on a building structure, only the method of hanging basket can be used, but the stability of the hanging basket is poor. difficulty.

(3) Accessories required by the climbing device - the number of attachment devices is relatively large. For example, for a structure of 900-1000 square meters per floor, 30-40 attachment devices need to be installed, and the installation accuracy is required to be high.

(3) Contents of the invention

In order to overcome the shortcomings in the prior art that the climbing equipment is complex, difficult to operate, limited in use function and a large number of attachment devices, the present invention proposes a lifting device.

The invention includes a main lifting mechanism and an auxiliary lifting mechanism, wherein the main lifting mechanism includes a main hook, an auxiliary hook, and a hydraulic system; the auxiliary lifting mechanism includes a main hook and an auxiliary hook. The main lifting mechanism and the auxiliary lifting mechanism are respectively installed in two different platform frames of the same platform, and are connected to each other through hydraulic pipes to realize the synchronous work of the main and auxiliary lifting mechanisms.

The main hook of the present invention includes a hook body, a cam disc, a main hook hook body pull rod, a limit block, a U-shaped adjustment card, a pin shaft, a hydraulic cylinder, a lock pin, and a lock pin ring. The hook body is a plate-shaped structure, the bottom edge of the hook body is connected with the hook body pull rod of the main hook, one side is a hypotenuse, and the angle between the slope and the horizontal plane is 55 degrees, which is used to realize the change of the hook body mechanism when the hook body rises. position, and the lower end of the hypotenuse has a protrusion extending over the bottom edge, forming a hook. The limit block and the cam disc cooperate with the hook body through the inner threaded hole in the middle of the hook body respectively. One end of the pull rod of the main hook is a pair of lugs with connecting holes; the U-shaped adjustment card is composed of a handle and a pair of clamps, and the distance between the two clamps should meet the needs of installing the lugs of the pull rod of the main hook ; There are connecting holes in the middle of the clamping plate, and the inner diameters of the connecting holes are the same as the connecting holes on the lugs and the connecting holes on the piston rod of the hydraulic cylinder. Connect the piston rod of the hydraulic cylinder, the lug of the main hook hook body pull rod and the connecting hole on the U-shaped adjustment card from the inside to the outside in turn through the pin shaft, and make the three movable. The cam disc is an eccentric large semi-circular disc, and there is a lock hole on the arc edge of the cam disc; On one side of the outer surface of the main hook hook body pull rod at the corresponding position, a circular locking pin ring is horizontally fixed, and the locking pin is placed in the locking pin ring, and the two are movable fit, and the center of the locking pin ring is in line with the The disc faces of the cam disc are perpendicular to each other. When the lock hole on the cam disc is at the same level as the lock pin ring, insert one end of the lock pin into the lock hole of the cam disc to lock the relative rotation between the cam disc and the hook body; When the pin is locked, the cam disc naturally sags under the action of its own weight, which can realize the displacement of the entire hook body mechanism when the hook body descends.

The hydraulic cylinder is used as the extension and contraction element of the main hook, and its outer cylinder is connected with the base of the hydraulic cylinder through a pin shaft, and the base of the hydraulic cylinder is fixedly installed on the bottom surface of the platform frame.

The auxiliary hook of the present invention comprises a hook body, a cam disc, a limit block, a bearing pin 11, an auxiliary hook hook body pull bar, a lock pin, a lock pin ring, an auxiliary hook return spring, and an auxiliary hook return lever. Wherein the hook body, the cam disc, the lock pin, the lock pin ring, the structure of the limit block and the mutual connection mode are the same as the main hook. One end of the auxiliary hook body pull rod is fixedly connected with the hook body, and the other end is connected with the auxiliary hook support plate fixed on the platform frame through a pin shaft, and an auxiliary hook return rod is welded on the lower part of the auxiliary hook body pull rod. There is also an auxiliary hook return spring on the side of the auxiliary hook support plate. The return spring is fixed on the platform frame, and the upper end is connected with the auxiliary hook body through the auxiliary hook return rod, the auxiliary hook body pull rod, and is used for the entire auxiliary hook. Automatic return after hook displacement. And the return of main hook is carried out automatically by the gravity action of hydraulic cylinder and main hook body etc.

Hydraulic system. The hydraulic system of the main lifting mechanism is located in the platform frame, wherein the oil tank of the hydraulic system is fixed on the platform frame through bolts; The blocks are respectively installed on the oil tank; the hydraulic pump is installed on the output shaft end of the motor, and the hydraulic cylinder is used to control the lifting and lowering of the operating platform. The hydraulic system simultaneously controls the main elevating mechanism and the auxiliary elevating mechanism; the main elevating mechanism and the auxiliary elevating mechanism are connected through a hydraulic pipe 3 to ensure that the main and auxiliary elevating mechanisms move up and down synchronously.

Before the lifting device is operated, the hook bodies of its main and auxiliary hooks are all hung on the same support beam of the aerial work platform support. The operation process when ascending is:

The first step is to operate the hydraulic system to make the piston rod of the main hook hydraulic cylinder extend upwards until the upper hook body of the piston rod is hung on the upper support beam.

The second step shrinks the hydraulic cylinder, so that the platform frame connected to the lifting device rises under the pulling of the hydraulic cylinder; the auxiliary hook also rises accordingly, and the hook body of the auxiliary hook is automatically hung into the same support beam of the aerial work platform support.

If the third step continues to rise, repeat the first and second steps. During the lifting operation, the displacement of the main hook and the auxiliary hook is realized through the slope on the upper part of the hook body.

When descending:

The first step is to shrink the hydraulic cylinder so that the hook body of the auxiliary hook first rises for a certain distance under the lifting of the hydraulic cylinder and leaves the support beam.

The second step loosens the cam plate lock pin of the auxiliary hook, and the cam plate rotates downward under the action of its own weight.

The third step is to control the large cavity of the hydraulic cylinder to feed oil, and the piston rod is extended to lower the auxiliary hook and the platform frame connected to the climbing device. Go over the bracket beams.

The fourth step controls the hydraulic system, pauses the descent, and locks the cam disc of the auxiliary hook with a lock pin.

The fifth step continues to descend, and the auxiliary hook directly hangs the hook body into the corresponding support beam under the action of the auxiliary hook return spring.

The sixth step is to further extend the hydraulic cylinder to separate the hook body of the main hook from the support beam, and release the lock pin of the main hook cam disc.

The seventh step shrinks the hydraulic cylinder so that the hook body of the main hook crosses the upper support beam, and after locking the main hook cam disc with the lock pin again, the hook body of the main hook falls on the corresponding support beam.

If the eighth step continues to descend, repeat the first step to the seventh step.

Compared with prior art, the present invention is characterized in that:

(1) The structure is simple, the operation is simple, the operability is strong, and it is convenient to operate and use on the construction site, which overcomes the shortcomings of the complicated and difficult-to-operate climbing equipment in the prior art.

(2) The structure is compact, which is conducive to the arrangement of the lifting device in the aerial work platform equipment, does not require too many attachments of the attachment device, and has the characteristics of high reliability and low cost.

(3) The present invention not only facilitates the ascending operation of the aerial work platform, but also facilitates the descending operation of the equipment. The scope of application of the project, such as the construction of new building structures, the re-decoration of old buildings, the maintenance and renovation of high-rise building structures, the cleaning of the outer surface of high-rise buildings, etc.

(4) Description of drawings:

Below in conjunction with accompanying drawing, the present invention will be further described,

Accompanying drawing 1 is a structural representation of the present invention;

Accompanying drawing 2 is the front view and the top view of the structural representation of main elevating mechanism;

Accompanying drawing 3 is the front view and the top view of the structural schematic diagram of auxiliary lifting mechanism;

Accompanying drawing 4 is the structural schematic diagram and partial enlarged schematic diagram of main hook;

Accompanying drawing 5 is the structural representation of main hook;

Accompanying drawing 6 is the structural representation of locking pin ring;

Accompanying drawing 7 is the structural representation of U-shaped adjustment card;

Accompanying drawing 8 is the structural schematic diagram and partial enlarged view of secondary hook;

Accompanying drawing 9 is the schematic diagram of climbing process. in:

1. Main lifting mechanism 2. Auxiliary lifting mechanism 3. Hydraulic pipe 4. Main hook 5. Auxiliary hook

6. Hook body 7. Cam disc 8. Main hook hook body pull rod 9. Limit block 10. Adjustment card

11. Pin shaft 12. Hydraulic cylinder 13. Auxiliary hook body pull rod 14. Auxiliary hook return spring

15. Lock pin 16. Lock pin ring 17. Hydraulic cylinder base 18. Auxiliary hook return lever

19. Auxiliary hook support plate 20. Oil circuit manifold 21. Filter screen 22. Fuel tank 23. Hydraulic pump

24. Motor 25. Platform frame 26. Bracket beam

(5) Specific implementation methods

This embodiment includes a main lifting mechanism 1 and an auxiliary lifting mechanism 2; the main lifting mechanism includes a main hook 4, an auxiliary hook 5 and a hydraulic system, as shown in Figure 2; the auxiliary lifting mechanism includes a main hook 4 and an auxiliary hook 5, as shown in Figure 3 . The main and auxiliary lifting mechanisms are installed in two different platform frames of the same platform, and are connected to each other through hydraulic pipes 3 to realize the synchronization of the main and auxiliary lifting mechanisms, as shown in Figure 1.

main hook. As shown in accompanying drawing 4, the main hook is composed of hook body 6, cam disc 7, main hook hook body pull rod 8, limit block 9, U-shaped adjustment card 10, pin shaft 11, hydraulic cylinder 12, lock pin 15, lock pin Ring 16 constitutes. In this embodiment, the hook body 6 is a forged piece, and its shape is an irregular triangle: the bottom side is a straight side, which is used to connect with the main hook hook body pull rod; one side is a hypotenuse, and the angle between the slope and the horizontal plane is 55° During the ascent of the hook body 6, the inclined surface of the hook body is in contact with the support beam 26, forcing the hook body to rotate outwards to realize the displacement of the main hook and the auxiliary hook. And the lower end of the hypotenuse has a protrusion extending over the bottom, forming a hook. The middle part of the hook body is arranged up and down with two internally threaded holes for assembling the limit block 9 and the cam disc 7: the cylinder limit block 9 with external thread at one end is fixedly installed on the hook body through the internally threaded hole above. In the extreme position of restricting the rotation of the cam disc 7; the cam disc 7 is flexibly connected with the hook body through the internal thread hole below. The lower part of the hook body is a cylindrical hook body pull rod, and the lower part of the pull rod is a pair of lugs with connecting holes. The U-shaped adjustment clip 10 with handle is composed of a handle and a pair of clips. The hole on the connecting hole and the hole on the lug and the hole on the piston rod of the hydraulic cylinder 12 are all through holes with the same inner diameter. The piston rod of the hydraulic cylinder 12, the lugs of the pull rod and the connecting holes on the U-shaped adjustment card are connected together through the pin shaft 11 from the inside to the outside in turn, and the three are movably matched. Cam disc 7 is an eccentric large semi-circular disc, and on the arc edge of cam disc 7, there is a keyhole; On the outer surface of one side of the main hook body pull rod corresponding to the keyhole of the lock hole, two annular lock pin rings 16 are horizontally fixed. Cooperate, and the circle center of this locking pin ring and the disk surface of cam disk are perpendicular to each other. As shown in accompanying drawing 5 and accompanying drawing 6, the lock pin 15 is placed in the lock pin ring, when one end of the lock pin is inserted into the cam disc lock hole, the relative rotation of the cam disc and the hook body can be locked; release the lock During pin 15, cam disc 7 hangs down naturally under deadweight effect, can realize the displacement of whole hook body mechanism when hook body 6 descends.

Hydraulic cylinder 12 is as the stretching and shrinking element of main hook, and its outer cylinder is connected with hydraulic cylinder base 17 by bearing pin, and hydraulic cylinder base is then fixedly installed on platform frame 25 bottom surfaces, as shown in accompanying drawing 2,3.

Deputy hook. Auxiliary hook is shown in accompanying drawing 8, by hook body 6, cam disc 7, limit block 9, bearing pin 11, auxiliary hook hook body pull bar 13, locking pin 15, locking pin ring 16, auxiliary hook return spring 14, Auxiliary hook return lever 18 constitutes. Wherein the structure of hook body 6, cam disc 7, lock pin 15, lock pin ring 16, spacer 9 and the mutual connection mode are identical with main hook (accompanying drawing 4,5). One end of the auxiliary hook hook body pull rod 13 is fixedly welded with the hook body, and the other end is connected with the auxiliary hook support plate 19 fixed on the platform frame by a bearing pin, and an auxiliary hook return bar 18 is welded at the auxiliary hook hook body pull bar bottom. There is also an auxiliary hook return spring 14 on the auxiliary hook support plate 19 side, which is fixed on the platform frame, and the upper end is connected with the auxiliary hook body by the auxiliary hook return rod 18, the auxiliary hook body pull bar 13, It is used for automatic return after the entire auxiliary hook is displaced. And the return of main hook is carried out automatically by the gravity action of hydraulic cylinder and main hook body etc.

Hydraulic system. The hydraulic system is installed in the platform frame 25 with the main lifting mechanism, and the output and input oil pipes of the hydraulic system are connected with the hydraulic cylinders 12 of the main lifting mechanism and the auxiliary lifting mechanism respectively. The fuel tank 22 of the hydraulic system is fixed on the bottom plate of the platform frame 25 by bolts, and the motor 24 and the oil circuit manifold 20 integrating the relief valve, electromagnetic reversing valve, diverter and flow valve, and balance valve are respectively installed on the fuel tank 22 , The hydraulic pump 23 is installed on the output shaft end of the motor. The hydraulic cylinder 12 is used to control the lifting and lowering of the operating platform. The hydraulic cylinder of the auxiliary lifting mechanism is connected with the hydraulic system of the main lifting mechanism through the hydraulic pipe 3, and the rising and falling actions of the main and auxiliary lifting mechanisms are synchronized.

Before the lifting device is operated, the hook bodies 6 of its main hook 4 and auxiliary hook 5 are all hung on the same (horizontal) support beam 26 of the aerial work platform support. The operation process when ascending is:

The first step operates the hydraulic system to make the piston rod of the main hook hydraulic cylinder 12 stretch out upwards until the hook body 6 at the top of the piston rod is hung on the support crossbeam 26 above.

The second step shrinks the hydraulic cylinder, so that the platform frame 25 connected with the lifting device rises under the pulling of the hydraulic cylinder; the auxiliary hook 5 also rises accordingly, and the hook body 6 of the auxiliary hook is automatically hung into the same support beam of the aerial work platform support 26 on.

If the third step continues to rise, repeat the first and second steps. During the lifting operation, the displacement of the main hook 4 and the auxiliary hook 5 is realized by the slope on the upper part of the hook body.

When descending:

The first step is to shrink the hydraulic cylinder so that the hook body 6 of the auxiliary hook 5 rises for a certain distance under the lifting of the hydraulic cylinder and leaves the support beam 26 (Fig. 9b).

The second step loosens the cam disc lock pin 15 of the auxiliary hook 5, and the cam disc 7 rotates downward under the action of its own weight (Fig. 9c).

The third step is to control the hydraulic cylinder 12 to feed oil into the large cavity, and the piston rod is extended to lower the auxiliary hook 5 and the platform frame 25 connected with the climbing device. The lower edge of the cam disc 7 of the auxiliary hook 5 contacts the bracket beam 26, forcing the auxiliary hook 5 produces displacement, and crosses the support crossbeam smoothly (Fig. 9d).

The fourth step controls the hydraulic system, suspends the descent, and locks the cam disc 7 (Fig. 9e) of the auxiliary hook with the lock pin 15.

The fifth step continues to descend, and the auxiliary hook 5 makes the hook body 6 directly hang into the corresponding support beam 26 under the action of the auxiliary hook return spring 14 .

The 6th step extends hydraulic cylinder 12 further, the hook body 6 of main hook 4 is separated from support beam 26, and decontrols the lock pin 15 of main hook cam disc.

The 7th step retracts hydraulic cylinder 12, makes the hook body of main hook cross the upper support beam 26, after locking the main hook cam disc 7 with lock pin 15 again, makes the hook body of main hook fall on the corresponding support beam 26.

If the eighth step continues to descend, repeat the first step to the seventh step.

Claims (3)

1. A lifting device for an aerial work platform, characterized in that: a. The lifting device includes a main lifting mechanism and an auxiliary lifting mechanism (2), and the main lifting mechanism and the auxiliary lifting mechanism are respectively installed in two different platform frames (25) of the same platform; the main lifting mechanism (1) and the auxiliary lifting mechanism Mechanisms (2) both include a main hook (4) and an auxiliary hook (5), and the main lifting mechanism (1) also includes a hydraulic system; b. Both the main hook and the auxiliary hook include a hook body (6), a cam disc (7), a limit block (9), a pin shaft (11), a lock pin (15), and a lock pin ring (16), wherein: the hook One side of the body (6) is a bevel, and the side extends downwards past the bottom of the hook body (6) to form a hook; The threaded hole is installed on the hook body; there is a lock hole on the arc edge of the cam disc (7); the lock pin ring (16) is located on the main hook hook body pull rod (8 ), the center of circle of the lock pin ring (16) is perpendicular to the disk surface of the cam disc (7), and the lock pin (15) passes through the lock pin ring (16); when one end of the lock pin (15) When inserted into the lock hole of the cam disc (7), the relative rotation between the cam disc and the hook body (6) can be locked; when the lock pin (15) is released, the cam disc (7) will naturally droop under the action of its own weight, and the hook can be realized. Displacement of the whole hook body mechanism when the body (6) descends; c. One end of the main hook hook body pull rod (8) is fixedly connected with the hook body, and the other end is a pair of ear pieces with connection holes; There is a connection hole, and the piston rod of the hydraulic cylinder (12), the lug of the main hook body pull rod and the pin shaft (11) for the U-shaped adjustment card are threaded together from the inside to the outside, and the three are movable and coordinated. One end of the auxiliary hook hook body pull rod (13) is fixedly connected with the hook body, and the other end is connected with the auxiliary hook support plate (19) fixed on the platform frame through a pin shaft; d. The auxiliary hook (5) also includes an auxiliary hook return spring (14); the auxiliary hook return spring (14) is located on one side of the auxiliary hook support plate (19), is fixed on the platform frame (25), and the upper end Connected with the hook body (6) through the auxiliary hook return lever (18) and the auxiliary hook hook body pull rod (13), it is used for the automatic return of the entire auxiliary hook (5) after displacement; e. The hydraulic system is installed in the platform frame 25 with the main lifting mechanism, and the output and input oil pipes of the hydraulic system are respectively connected with the hydraulic cylinders 12 of the main lifting mechanism and the auxiliary lifting mechanism. 2. The lifting device for aerial work platforms according to claim 1, characterized in that the angle between the inclined surface of the hypotenuse on one side of the hook body (6) and the horizontal plane is 55 degrees. 3. The lifting device for aerial work platforms according to claim 1, characterized in that the internal thread holes for installing the limit block (9) and the cam disc (7) are arranged up and down on the hook body (6).

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