CN104477815A - Platform-retractable hydraulic lift - Google Patents

Abstract

The invention aims to provide a platform-retractable hydraulic lift, which mainly comprises three parts, i.e. a chassis, a connecting rod mechanism and a manned platform. A hydraulic driving mode is adopted, the basic working principle is that the hydraulic list moves to a specified position, motive power is provided by a motor to drive a hydraulic pump, and then a hydraulic cylinder works to further drive the connecting rod mechanism to be unfolded to lift the platform. After the platform reaches a specified operation height, power is provided by the hydraulic motor according to operation needs, then gears and a rack are driven to rotate to further extend the platform, and meanwhile, a counterweight platform is driven by the gears and the rack to reversely extend. According to the platform-retractable hydraulic lift, the movement of the whole lift is reduced, the problem of limited horizontal operation space of various kinds of lifting operation in an enterprise is effectively solved, and the operation range of an operator is widened; the counterweight platform driven by the gears and the rack reversely extends, so that center-of-gravity shift is effectively prevented, and the safety and the stability of the manned platform are ensured.

Description

Platform retractable hydraulic lift

technical field

The invention relates to a lifting mechanism.

Background technique

Hydraulic lift products are divided into crank arm hydraulic lifts, scissor hydraulic lifts, mast hydraulic lifts, and straight arm hydraulic lifts according to their working methods. The hydraulic lift is a replacement product of the folding arm lift and the scissor lift. It can be widely used in stations, docks, airports, hotels, post and telecommunications, municipal gardens, grain depots, cleaning companies, public building facade decoration, decoration or installation and maintenance of power systems, etc. Elevators generally have the advantages of light weight, self-propelled, electric start, self-supporting legs, simple operation, large working area, especially the ability to cross obstacles for high-altitude operations.

The retractable platform hydraulic lift mainly realizes the lifting function through the pressure transmission of hydraulic oil. The scissor mechanical structure makes the lift have high stability; the retractable platform makes the high-altitude operation wider and suitable for many people. Work at the same time. This makes high-altitude operations more efficient and safer.

Contents of the invention

The purpose of the present invention is to provide a platform retractable hydraulic lift that effectively solves the problem of limited horizontal operating space for various types of lifting operations in enterprises and expands the operator's operating range.

The purpose of the present invention is achieved like this:

The platform retractable hydraulic lift of the present invention is characterized in that it includes a chassis part, a connecting rod mechanism, and a manned platform;

The chassis part includes an upper chassis, a lower chassis, and a cover plate. The cover plate is fixed on the lower chassis, and the upper chassis and the cover plate are supported by balls. The plunger motor is connected to the large gear of the chassis through the chassis shaft, and the pinion shaft of the pinion gear of the chassis is connected to the upper chassis through double flat keys;

The manned platform includes a manned sliding table, a counterweight sliding table, a steel plate, and a bracket. The steel plate is fixed on the bracket and is located above the bracket. The first track and the second track are set on the steel plate, and the manned sliding table and the counterweight sliding table are respectively set. On the first track and the second track, a gear motor is installed on the bracket, and the first rack and the second rack are respectively installed under the manned sliding table and the counterweight sliding table. The output shaft of the gear motor passes through the steel plate to connect the large gear. The large gear meshes with the first rack and the second rack respectively, and the manned sliding table and the counterweight sliding table are extended or retracted in opposite directions driven by the gear motor;

The connecting rod mechanism is two sets of X-shaped connecting rods with the same structure and arranged in parallel. The two ends of the two sets of X-shaped connecting rods are respectively connected to the upper chassis and the bracket. Extend or compress under the drive of hydraulic cylinder.

The advantages of the present invention are: the present invention reduces the overall movement of the elevator, effectively solves the problem of limited operating space for various types of lifting operations in enterprises, and expands the operator's operating range. The counterweight table driven by rack and pinion protrudes in the opposite direction, which effectively prevents the center of gravity from shifting and ensures the safety and stability of the manned platform.

Description of drawings

Fig. 1 is the front view of the present invention;

Figure 2 is a partial enlarged view I of the main view;

Figure 3 is the partial enlarged picture II of the main view;

Fig. 4 is the left view of the present invention;

Figure 5 is a partial enlarged view of the left view III

Fig. 6 is a partial enlarged view IV of the left view.

Detailed ways

The present invention is described in more detail below in conjunction with accompanying drawing example:

1-6, the present invention discloses a telescopic platform hydraulic lift, which is suitable for lifting people or heavy objects totaling less than 1t to a height of 10m, and can extend the platform horizontally at the working height according to the working requirements. , reducing the overall movement of the elevator, effectively solving the problem of limited operating space for various types of lifting operations in the enterprise, and expanding the operator's operating range. The platform retractable hydraulic lift is mainly composed of 3 parts: chassis, connecting rod mechanism and manned platform. It adopts hydraulic drive. The basic working principle is that the hydraulic lift moves to the designated position, and the motor provides the driving force to drive the hydraulic pump to make the hydraulic cylinder work, and then drive the connecting rod mechanism to expand it and raise the platform. After the platform reaches the specified working height, according to the needs of the operation, the hydraulic motor will provide power to drive the rack and pinion transmission, and then the platform will be stretched out. Ensure the safety and stability of the manned platform.

Platform retractable hydraulic lift consists of wheel 1, wheel fork 2, wheel fork fixing nut 3, washer 4, lower chassis 5, locking screw 6, cover plate 7, connecting rod 8, ball 9, upper chassis 10, hydraulic cylinder 11 , hydraulic cylinder mounting rod 12, sliding guide rod 13, gear motor 14, rack 15, fixing screw 16, large nut 17, washer 18, large gear 19, platform shaft 20, copper ring 21, felt ring 22, bearing end cover 23. Felt ring 24, end cover screw 25, bearing 26, guardrail 27, upper support column 28, end face nut 29, gasket 30, connecting bolt 31, platform sliding rod 32, limit block 33, pinion shaft 34, Nut 35, gasket M1636, pressure gauge 37, console 38, oil source 39, key 40, sleeve 41, chassis shaft 42, plunger motor 43, positioning sleeve 44, lower support column 45, ball 46, counterweight sliding Table 47, manned sliding table 48, mounting frame 49, fixing bolt 50, connecting rod connecting shaft 51, slotted nut 52, gasket 53, cotter pin 54, reinforcing rib 55, sleeve 56, sleeve 57, welding Block 58, end cap 59, fastening screw 60, bearing 61, felt ring 62, axle 63, support leg 64, shaft coupling 65, chassis pinion 66, chassis gear 67, double flat key 68 and other components.

The platform retractable hydraulic lift consists of three parts: chassis, connecting rod mechanism and manned platform. The specific installation relationship is as follows:

The chassis part is composed of the lower chassis 5, the cover plate 7 and the upper chassis 10. The wheel 1 is mounted on the four corners of the lower chassis 5 by the wheel fork 2 through the wheel fork fixing nut 3 and the washer 4, and each axle 63 is equipped with Pairs of bearings 61 are sealed with felt rings 62 , and end caps 59 are fixed by fastening screws 60 . The legs 64 used for positioning support are connected to the lower chassis 5 by welding blocks 58 . An oil source is installed inside the lower chassis 5, the plunger motor 43 is connected with the chassis shaft 42 through a coupling 65, the chassis shaft 42 is connected with the coupling 65 through a key 40, and a sleeve 41 is installed on the outside, and the plunger motor 43 is connected through a coupling. The shaft device 65 passes through the cover plate 7 and is connected with the large gear wheel 67 of the chassis. The chassis gear 67 rotates to drive the chassis pinion 66, and the chassis pinion 66 is connected by a double flat key 68 to make the upper chassis 10 rotate around its center, and the cylindrical support cylinder is welded with the axis of the chassis pinion 66 as the center, in order to reduce friction. Balls 9 are added at the matching place of the upper and lower cylinders. The lower chassis 5 and the cover plate 7 are fixed by locking screws 6. In order to strengthen the strength of the cover plate 7, five lower support columns 45 with positioning sleeves 44 are evenly arranged inside the chassis, and nuts 35 and washers 36 are matched with them. . The upper chassis 10 is equipped with a link mechanism, and a limit block 33 is set to ensure that the sliding will not slide too much. For the convenience of the control of the whole hydraulic system, the oil source 39 is led to the welding console 38 of the lower chassis 5 tailstock through the oil pipe, and a pressure gauge 37 is arranged on the platform, which can easily control the lift, rotation and expansion of the lift car.

The limit angle of the X-type connecting rod is 60o when it is raised to the highest point. In order to ensure the stability of the hydraulic lift car, a double-row linkage mechanism is used, and the middle is connected by a connecting rod connecting shaft 51, so as to prevent the two rows of linkage mechanisms from being asynchronous during work and causing the hydraulic lift to tilt. The connecting rod mechanism includes 32 connecting rods in total, and the connecting rods 32 are connected by slotted nuts 52, gaskets 53, cotter pins 54 and other components, among which 4 are special hydraulic cylinder installation rods 12 for installing hydraulic cylinder 11. One end of the upper part of the rod mechanism is fixed with the lower end of the manned platform by the shaft, and the other end is connected with the sliding track of the manned platform by the platform sliding rod 32, so that the connecting rod is quickly deployed. The structure of the hydraulic cylinder installation rod 12 is different from that of the ordinary connecting rod 8. While ensuring the normal positioning, installation and operation of the hydraulic cylinder 11, in order to ensure that the strength of the hydraulic cylinder installation shaft meets the working requirements, the sleeve 56 is welded to strengthen the ribs 55, To ensure the strength requirements of the shaft.

The manned platform with telescopic function enables the operator to reach the designated position conveniently when working. In order to cooperate with the position change when the link mechanism expands and expands, and to maintain the stability of the entire platform, two tracks are designed at the lower part of the manned platform, so that the sliding guide rod 13 slides on the track. The sliding guide rod 13 is formed by the end nut 29 and the pad. The sheet 30 is fixed on the end face, and 8 upper support columns 28 are evenly distributed in the platform. The manned platform consists of three parts: the uppermost part is the guardrail 27 welded to the platform; the steel plate protruding below is installed with the rack 15 through the fixing screw 16, and meshes with the large gear 19 installed at the bottom, and the large nut 17 and the washer 18 are connected to the platform shaft 20 To cooperate, in order to ensure the normal operation of the bearing 26, it is equipped with a copper ring 21 and a felt ring 22, and the bearing end cover 23 is fixed by the end cover screw 25 and the felt ring 24. Gear motor 14 is contained on the mounting frame 49, and mounting frame 49 is fixed below the platform by fixing bolt 50. Power is provided by gear motor 14 during work, and bull gear 19 is rotated. Drive the rack 15 to make the manned sliding platform 48 stretch out. In order to prevent the center of gravity of the hydraulic lifting vehicle from shifting when the manned sliding platform 48 stretches out, the counterweight platform 47 is designed, and the double rack and pinion meshing mode is adopted, that is, when the manned sliding platform 48 is stretched out, the center of gravity of the hydraulic lift truck is offset. When the platform 48 stretches out, the large gear 19 drives the rack on the other side to protrude in the opposite direction, and the rack is fixed on the counterweight table 47 by the fixing screw 16 to protrude, so that the counterweight table 47 protrudes in the reverse direction to ensure the hydraulic pressure. The balance of the lift truck. The protruding track adopts a dovetail groove structure and ensures positioning. Balls 46 are embedded inside the counterweight table 47 to reduce the frictional force when the platform stretches out.

Basic principle: The hydraulic lift moves to the specified position, the motor provides the motive force, drives the hydraulic pump, makes the hydraulic cylinder work, and then drives the connecting rod mechanism to make it unfold, the platform rises, and when it reaches the specified height, the platform and the counterweight table extend simultaneously. out, not only reach the designated job position but also ensure the overall stability. Specifically:

1) Walking and wheel steering actions are specifically: the driving mechanism is driven by two hydraulic motors, and the hydraulic motors are directly installed on the driving wheel and installed diagonally, that is, on the wheel fork 2 under the chassis connected by the wheel fork fixing nut 3 The four wheels 1 are equipped with two driving motors diagonally, so that two of the four wheels are active and the other are driven, thereby driving the platform to realize longitudinal walking and lateral walking.

2) The chassis rotation action is specifically: the console 38 at the tail of the chassis drives the hydraulic motor 43, and the gear mechanism is installed on the cover plate 7 to connect with the plunger motor 43 of the lower chassis 5 to drive the gears to rotate. According to actual situation, utilize console 38 to make chassis rotate to work suitable angle.

3) The lifting action is specifically: start the control valve of the hydraulic system to extend the hydraulic cylinder 11, and push the X-shaped connecting rod to rise, so that the manned platform rises. The limit angle of the X-shaped connecting rod is 60o when it is raised to the highest.

4) The expansion and contraction of the manned platform is specifically: powered by the hydraulic motor 14, the large gear 19 is rotated, and the rack 15 is driven to move, and then the platform is stretched out, in order to prevent the center of gravity of the hydraulic lift vehicle from shifting when the manned platform is stretched out , when the manned platform is stretched out, the counterweight platform that also adopts the rack and pinion mechanism is stretched out in the opposite direction at the same time to ensure the balance of the hydraulic lift car, so that it can be conveniently reached the designated position during manual installation, expanding the Work scope, improve work efficiency.

Claims (1)

1. platform telescoping hydraulic hoist, is characterized in that: comprise chassis portion, connecting rod mechanism, manned platform;

Chassis portion comprises top bottom-disc, low bottom-disc, cover plate, cover plate is fixed on low bottom-disc, supported by ball between top bottom-disc and cover plate, cover plate is installed intermeshing chassis big gear wheel and chassis miniature gears, low bottom-disc installs piston motor, piston motor is by chassis axle connecting base plate big gear wheel, and the pinion shaft of chassis miniature gears is connected by two flat key with top bottom-disc;

Manned platform comprises manned sliding stand, counterweight sliding stand, steel plate, support, Interal fixation is on support and be positioned at above support, steel plate is arranged the first track and the second track, manned sliding stand and counterweight sliding stand are separately positioned on the first track and the second track, gear motor installed by support, below manned sliding stand and counterweight sliding stand, the first tooth bar and the second tooth bar are installed respectively, the output shaft of gear motor connects big gear wheel through steel plate, big gear wheel engages with the first tooth bar and the second tooth bar respectively, manned sliding stand and counterweight sliding stand stretch out round about or retract under the driving of gear motor,

Connecting rod mechanism is that two groups of structures are identical, the parallel X-type connecting rod arranged, the two ends of two groups of X-type connecting rods connect top bottom-disc and support respectively, and two groups of X-type connecting rods install hydraulic actuating cylinder respectively, and X-type connecting rod extends or compresses under the driving of hydraulic actuating cylinder.