SU1430338A1 - Hoist - Google Patents

Abstract

The invention relates to hoisting and transport vehicles and can be used in the installation and maintenance of high-voltage power lines and high-rise structures. The purpose of the invention is to raise the load-carrying capacity, lifting height and operating satisfaction. Hinged-and-open mechanism (SHRM), - disposable.lege

Description

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The supporting 1 n aperture 8 gshatformen and connected to the Ш1М with the help of rotatable lower 2 and upper 7 pushers are made of two sections — the lower prismatic 4 and the upper pyramidal 5. Lp provide the required direction of the arms 11 from the folded position brackets 6 are provided with restrictive stops. The lift cylinder 15 of the hydraulic cylinder is mounted to interact directly with the lifting platform 8 and by means of telescopic t g is connected with the brackets 3 not lower than the second level of the lower section 4. The lifting of the platform 8 at the first stage is carried out directly by the rod 15. A certain lifting height is tensioned by a gt 16 and a further lifting is carried out by the action of the rod 15 through these rods on the brackets .3о 1 з „According to the file, 6 Il.

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The invention relates to lifting and transporting devices and can be used in the installation and maintenance of high voltage power lines and other high-rise structures.

The purpose of the invention is to increase the load capacity, lifting height and ease of operation.

Figure 1 shows the lift in the raised position of the lifting platform, side view; figure 2 - the same, in the folded position; FIG. 3 is a view A of FIG. 1; figure 4 - section bb in figure 1; figure 5 is a view In fig about 2; Fig 6 - section GGD of Fig

The lift includes a support platform 1 with a running gear. The bottom pushers 2 are pivotally mounted on one end. Other pusher ends are also connected to the bottom brackets .3 of the pivot mechanism consisting of a prismatic 4 and a pyramidal 5 sections. To the top brackets 6 by means of the top pushers 7 a lifting platform 8 is attached with a lifting load 9 o. The prismatic section 4 of the mechanism consists of levers 10 of the same length pivotally connected in pairs in the middle part, one and the other ends of which are pivotally attached to the brackets 3 The pyramidal section 5 of the mechanism consists of levers 11 of various lengths connected in pairs by a central hinge 12.

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shifted towards the other arms of the levers by the same amount. The levers 11 are made with the possibility of elastic bending in the plane passing through the longitudinal axes of the hinges. One and the other ends of the levers 11 are also pivotally attached to brackets 6, which are provided with restrictive stops 13. On the vehicle platform, there is a telescopic hydraulic cylinder 14, the stem 15 of which is connected to the brackets 3 not lower than the second level T ha 16 pivotally attached to the bracket 3 at a point located midway between the hinge joints of the levers 10o

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The lifting device operates as follows.

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In the initial, transport position, the hinge-lever mechanism is 5} in the folded position. The brackets 6 rest on the limiting abutments 13 of the underlying brackets, and the brackets 3 rest directly on the underlying ones. All the lifting device rests on the supporting platform of the vehicle 1, resting on the brackets 3 of the first level. At the same time, the levers 11 and the brackets 6 are located inside the underlying, that provides a reduction in size along the height of the pyramidal section 5 of the hinged-lever

mechanism. 16 telescopic shorts are shortened, todo between, their traction. elements formed gaps. Before lifting the platform 8, the vehicle support platform 1 is mounted horizontally by means of the outriggers (not shown). Lifting the platform 8 at the first stage of the production directly by thrusting the rod 15 of the hydraulic cylinder 14. At the same time, the entire hinge-lever mechanism begins to stretch. The load on the rod. 15 of the hydraulic cylinder 14 is insignificant. As the rod rises much more than the speed of lifting the brackets of the 3 lower levels, then at the first stage the telescopic t g r 16 is without lengthening due to the reduction of the gaps between its elements. At a certain height of the lift t 16 g and further raising of the platform 8. the rod 15 acts through these pulls on the brackets 3. At the same time, the stem extension speed is much less than the lifting speed of the platform 8 and the load on the rod increases dramatically. However, this load is less important than the load on the cylinder rod when mounted t g 16. to the brackets 3 of the first level. The load from t g 16 to the brackets 3 is transmitted symmetrically with respect to the points of attachment of the levers 10.

When the hinge-lever mechanism is extended and the angle between the longitudinal axis of the lever and the vertical is reached within 30..35, the lift ends. A further iodine survey is impractical, since there is a rapid decrease in the cross section of the mechanism with a slight increase in lift height.

The lowering of the lifting platform 8 is carried out in reverse order.

Formula of Invention

Claims (2)

1. A lift comprising support and lifting platforms articulated by means of lower and upper five 0 five 0 five 0 five 0 Spiral articulated levers of the Nuremberg type knitting system, the sides of which are made of several pairs mounted on each other by intersecting levers pivotally interconnected ,, and brackets located at the corners of the sides and pivotally connecting one and the other ends of the arms of the levers adjacent sides, located in the same horizontal plane at different levels in height, one ends of the lower and one ends of the upper rammers, respectively, are connected by hinges with the supporting and lifting platforms, while others with brackets located in the lower and upper parts of the elevator, the elevator drive, made in the form of a power cylinder mounted on the supporting platform, whose retractable rod is pivotally connected to one ends of t g, the other ends of which are pivotally connected to the brackets of the lift, differing the fact that, in order to increase the lifting capacity, lift height and ease of operation, at least part of the hinge-lever mechanism is pyramid-shaped, in which the levers of each upper tier are made smaller than p The lower arms of the lower rus, and the central hinges of the intersecting levers are displaced to the other ends of the shoulders by the same amount, the brackets are provided with restrictive stops for fixing the levers in the lower position of the lifting platform. The tees are made with telescopic limited movement, with their other ends connected to brackets not located below the second gear of the lift, while the power cylinder rod is mounted with the possibility of direct interaction with the lifting platform in its lower position 2. The elevator in accordance with paragraph 1, 1, of tl and - whoever drinks with me; in order to increase stability, the pushers are also provided with restrictive stops for the support and lift platforms to interact with them in the working position of the lift. JO (fius.Z View A gz 6-6 (rigging the form FIG. 6