SU1463646A1 - Telescopic grip - Google Patents

Abstract

The invention relates to lifting and transport equipment, namely, rack cranes, equipped with telescopic grippers. The aim of the invention is to simplify the construction and increase the reliability of the telescopic gripper. For this purpose, in the fixed section 1, axles 2 are fixed with support rollers, onto which guides 5, made in the form of an equipolar trapezium with a smaller base below, lean the middle extension section 6. Extend the rise of the middle sliding section 6 occurs due to the movement of the inclined surface of the guides 5 along the support roller 3. The support rollers 3 are located with an eccentricity relative to the necks of the axes 2 for adjusting the ranks of the preliminary lifting of the end of the upper movable load-carrying section 11. 5 ip. e

Description

PUu.f /

thirty

The invention relates to an overhead transport implement, in particular to rack-mounted stacking cranes equipped with telescopic grippers.

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The purpose of the invention is to simplify the design and improve reliability.

FIG. 1 shows a telescopic grip, general view; in fig. 2 - section A-A in FIG. 1 in FIG. 3 shows a section BB in FIG. 2; in fig. 4 is a diagram of the telescopic capture in the middle position; in fig. 5 is a diagram of the telescopic capture in the extreme 15 j left position.

 The telescopic grip contains: non-body part 1, rigidly installed; Lenna on the forklift crane stacker (not shown). In the fixed 20 i section 1, the axles 2 are fixed with the supporting rollers 3 mounted on the bearings (not shown). Throughout the entire length of the fixed section 1, the box-shaped guides 4 are filled. Both the supporting cat 25 ki 3 are supported by the guides 5 medium pull-out section 6 with rollers 8 fixed at the ends on axles 7 and interacting with guides 4 Higher rollers 8 are located rollers 9 interacting with guides 10 of the sliding upper load-carrying section 11. Dp of movement of sections 6 and, П to fixed section 1 placed infinitely-closed chain 12, receiving movement from the drive sprocket 13 through a clutch from a drive (not shown), bypass 14 and tension 15 rollers, a rail 16 of the middle pull-out section 6, on which there is a second endlessly closed circuit I, bypass 18 and tension 19 rollers, : fixed rail 20 fixed on fixed section 1, and rail 21 mounted on top pull-out 45 load carrying section II. Support rollers 3 are located with eccentricity relative to necks 22 and 23 of axis 2. Axes 2 are provided with openings 24 on one side for a special driver and Q on the other are fixed with 1 IQs. 25,

 reducing the efforts required by the DPJ to lift the middle and upper load-carrying sections of the sliding sections 6 and P with the load, guiding the middle section 55 of the sliding section 6 are arranged symmetrically with respect to its middle, made in the form of an equipolar trapezium: with a smaller base, the length bo14636462

which side is chosen the most, i.e. the length of the smaller base 1 is determined in the extreme extended

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40

positioning the sliding sections 6 and 11 so that the support roller 3 on the fixed section 1 is at the end of the smaller base C as a double distance from the middle of the middle pull-out section 6 in the extended position to the axis 2 of the support roller 3.1 21 (Fig. 5). With a smaller length of 1 smaller base of the trapezium, the trapezium vertex passes further beyond the axis of the track roller 3, the side of the trapezium comes into contact with the track roller, and the middle and upper load-carrying sections are lowered, since the telescopic pickup stroke exceeds its length. With a larger value of 1, the length of the sides of the trapezoid is reduced, which, with the same height, requires a large amount of power and power consumption during lifting.

The length of the larger base of the trapezoid L is determined with the average position of the sliding sections 6 and 11 by the formula

,

where L is the length of the middle sliding section;

1 is the length of the section of the guides parallel to the smaller base of the trapezium.

The width of this section 1 corresponds to twice the distance from the edge of the middle sliding section 6 to the axis of the nearest support roller 3 on the fixed section 1, i.e. 1 2 1.

-7

With a smaller length of this section 1 or its absence as a result of lifting the middle sliding section 6, which interacts with its guides 5 with the supporting rollers 3, before the rollers 8 emerge from the guides 4, the rollers 8 can become jammed in the guides 4. the length of the side of the trapezium is reduced and, as a result, the force and power to lift the middle and upper load carrying section with the load increase.

The height of the trapezoid is determined from the similarity of triangles ABC and DEF (Fig. 5), in which there are two sides

five

0 5 45 Q

which side is chosen the most, i.e. the length of the smaller base 1 is determined in the extreme extended

five

40

positioning the sliding sections 6 and 11 so that the support roller 3 on the fixed section 1 is at the end of the smaller base C as a double distance from the middle of the middle pull-out section 6 in the extended position to the axis 2 of the support roller 3.1 21 (Fig. 5). With a smaller length of 1 smaller base of the trapezium, the trapezium vertex passes further beyond the axis of the track roller 3, the side of the trapezium comes into contact with the track roller, and the middle and upper load-carrying sections are lowered, since the telescopic pickup stroke exceeds its length. With a larger value of 1, the length of the sides of the trapezoid is reduced, which, with the same height, requires a large amount of power and power consumption during lifting.

The length of the larger base of the trapezoid L is determined with the average position of the sliding sections 6 and 11 by the formula

,

where L is the length of the middle sliding section;

1 is the length of the section of the guides parallel to the smaller base of the trapezium.

The width of this section 1 corresponds to twice the distance from the edge of the middle sliding section 6 to the axis of the nearest support roller 3 on the fixed section 1, i.e. 1 2 1.

-7

With a smaller length of this section 1 or its absence as a result of lifting the middle sliding section 6, which interacts with its guides 5 with the supporting rollers 3, before the rollers 8 emerge from the guides 4, the rollers 8 can become jammed in the guides 4. the length of the side of the trapezium is reduced and, as a result, the force and power to lift the middle and upper load-carrying section with the load increase.

The height of the trapezium is determined from the similarity of triangles ABC and DEF (Fig. 5), in which the two sides are parallel. The height of the preliminary lift of the telescopic grip end H does not quite correspond to the EF side of the triangle DEF, but due to the fact that the height of the preliminary lift H is 1-1.5% of the telescopic grip stroke, and therefore the difference between EF and H is very small, this distortion can be neglected.

Then the outcome of the above

AB

The sun

or

H I.

h I ..

Trapezium height

h

H- -U

where 1, K

LI l

minimum distance between the axles of the support rollers of the fixed section and the axes of the rollers of the middle pull-out section in the extended position;

the required or specified height of the preliminary lifting. Without taking into account the gaps in the joints, the end of the sliding upper load-carrying section;

the distance from the end of the sliding top load carrying to the axis of the most distant roller on the sliding middle section.

Thus, the height of the trapezoid is equal to the ratio of the product of the required height of the preliminary lifting of the end of the upper sliding load carrying section 11 by the minimum distance between the axes 2 and 7 of the supporting rollers 3 of the fixed section and the rollers 8 of the middle sliding section 6 in the screwed position to distance from; the end of the upper stationary load-carrying section 11 to the axis 7 of the most distant roller 8 on the stationary middle section 6, while the rollers 3 and 8 of the middle stationary and stationary-1 sections are located symmetrically at their ends.

Telescopic grip works: as follows.

Movement to the telescopic grip is transmitted by a drive (not shown) through a coupling (not shown) to the driving

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An asterisk 13, from which an infinite-closed circuit 12 receives movement. Last bends around the bypass 14 and tensioning 15 rollers, interacts with the rail 16 of the middle sliding section 6 and pulls it. An infinitely closed chain 17, located on the middle of the moving section.6, interacting with the fixed rail 20 mounted on the fixed section 1, extends the rail 215 reinforced on the sliding load-carrying section 11.

In the initial position, the rollers 8 are driven in box-shaped guides 4 of the fixed section 1, the middle section of the fixed section 6 is supported by the guides. 5 to the support rollers 3. At the start of movement, for example, to the left, the left roller 8 20 leaves the box-shaped guides 4, the right end of the guides 5 comes down from the right-side supporting roller 3. The inclined part of the left end of the guides 5 interacts with the left 25. the supporting roller 3 and, due to the movement of the inclined surface of the guides 5 on the onopHO fy roller 3, the middle and sliding section 6 is extended and raised.

30 After the end of the interaction of the left support roller 3 with the inclined part of the guides 5, the rise of the middle view of the sliding section 6 does not stop, as the distance between the left support roller 3 and the right roller 8 continues to decrease, and the lifting height remains constant, the angle increases inclination to the horizon of rollers 9, along which 40 load-carrying upper movable section is moved.

The movement to the initial position occurs in the reverse order, and the movement to the right side is similar to the movement to the left

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Claims (1)

Claims; A telescopic grip containing kinematically connected to a fixed section with alternating preliminary lifting of the ends in the bent position the middle section having in the lower part guides for interacting with support rollers symmetrically fixed with their axes at the ends of the fixed section and kinematically connected with Medium, movable load-carrying section, distinguishing55 51 With the fact that, in order to simplify the construction and improve reliability, the guides of the middle section have the form of an equipolar trapezoid in the longitudinal planes, and rollers are attached to the lower part of this section symmetrically along its ends to interact with the upper surface of the fixed section, the length of the smaller base of the trapezoid is equal to twice the distance from the middle of the middle section when its extreme position is extended to the axis of the support roller of the fixed section, the length of the larger base of the drain equal to the difference between the length of the middle section and the quadruple distance from the edge of the middle section to the support roller when the middle position of the middle section rollers and rollers of the middle and stationary sections at the extreme position divided by the distance from the end of the load-carrying section to the axis of the most distant rink of the middle sections. Q} UgJ 9 YU Fig, 1 IB 77 / S-s 1 lit 13 16 1 1215 Fig.Z