FI77632B - SAXKRAN. - Google Patents

Description

77632

SCISSOR CRANE - SAXKRAN

The present invention relates to a scissor crane consisting of a frame and lifting table on a platform such as a floor and scissor members between the frame and the lifting table movable by a pressure cylinder located horizontally in the frame.

The disadvantage of known scissor cranes of this type is that the size and weight are proportional to the lifting capacity. For example, for passenger cars, the height of the scissor crane must be about 30 cm in the lowest position when the lifting capacity is required to be two tons. This height of 30 cm is usually too much for ordinary cars.

The object of the present invention is to eliminate the above drawbacks. The scissor crane fluid according to the invention is characterized in that the body part of the pressure cylinder is attached by a transverse axis to the notched lugs attached to the connecting beam so that at the beginning of the from the intermediate bar to the initial lift before the actual lift begins. The invention makes the scissor crane very low, up to 12 cm, because the pressure cylinder can be horizontal and the scissor members can also be in the lowest position horizontally next to each other. Sufficient lifting force is also obtained for the initial lift when the load is on the scissor lift.

An embodiment of the invention is characterized in that the initial lifting device consists of a lifting lever articulated to the ends of the flat bars attached to the lugs, which is affected by the initial lifting movement of the pressure cylinder. The initial lifting device is thus 2 77632 free to follow the movements of the pressure cylinder after the initial lifting and does not require a separate power source.

The invention will now be described, by way of example, with reference to the accompanying drawings, in which

Figure 1 shows a top view of a scissor crane.

Figure 2 shows a side view of a scissor crane in an up position.

Figures 3, 4 and 5 show the operation of the scissor crane pressure cylinder in the lifting stages.

Fig. 6 shows a section taken along the line VI-VI in Fig. 1.

Fig. 7 shows a section taken along the line VII-VII in Fig. 6.

Fig. 8 shows a section taken along the line VIII-VIII in Fig. 6.

The scissor crane consists of a frame 1 and a lifting table 2 on a platform such as a floor, and scissor members 3, 4 between the frame and the lifting table, which are movable by means of a pressure cylinder 5. The pressure cylinder 5 is located in the horizontal plane of the body 1 and its force acts between the second end beam 6 of the body and the connecting beam 7 connecting the movable lower ends of the scissor members 3. The body part of the pressure cylinder 5 is attached by a transverse shaft 8 to the lugs 10 attached to the connecting beam 7 and provided with slots 9, so that in the initial stage of lifting the body part moves through the shaft 8 in the slot 9 while at the opposite end of the body part. the initial lifting device 11 lifts the scissor members 3, 4 with no power between them from the beam 12 to the initial lifting before the actual lifting begins. The initial lifting device 11 consists of a lifting lever 14 articulated to the ends of the flat bars 13 fixed to the ears 10,

Affected by the initial lifting movement of the pressure cylinder 5. The movable lower ends of the scissor members 3 have laterally projecting pneumatic and resiliently loaded safety latches 15, the latch ends of which lock the scissor crane body from holes 16 in the side beams. During lifting, the latch 15 moves in the holes 16 by the spring 17 the lowering of the pawl 15 is moved to the open position or inner position by means of compressed air indicated by the arrow 18 from the hole.

Experiments have shown that with the scissor part according to the invention it is possible to lift loads weighing two tons with a cylinder as small as 80 mm at a pressure of 250 bar.

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Claims (2)

4,77632 A scissor crane consisting of a frame (1) on a base such as a floor and a lifting table (2) and scissor members (3,4) between the frame and the lifting table, movable by means of a pressure cylinder (5) located horizontally and a force acts between the second end beam (6) of the frame and the connecting beam (7) connecting the movable lower ends of the scissor members (3), characterized in that the pressure cylinder body is attached by a transverse shaft (8) to slots (9) attached to the connecting beam (7) 10) so that in the initial stage of lifting the body part moves via the shaft (8) in the slots (9) and acts on the initial lifting device (11) at the opposite end of the body part, which lifts the scissor members (3, 4) from the beam between them to the initial lift before the actual lifting lifting begins. Scissor crane according to Claim 1, characterized in that the initial lifting device (11) consists of a lifting lever (14) articulated at the ends of the flat bars (13) fixed to the lugs (10) and affected by the initial lifting movement of the pressure cylinder (5).