SU1518262A1 - Roller bearing of telescopic hoist - Google Patents

Abstract

The invention relates to a lifting and transporting devices and mechanisms, mainly to vertical telescopic lifts. The purpose of the invention is to improve the performance characteristics by providing a constant force contact between the working surfaces of the rollers and the guide. Each pull-out section is provided with an upper 4 and a lower 5 tips (by themselves). The top tip 4 consists of a flange 6, on which four brackets 7 are mounted with the possibility of movement in the radial direction. Axles 9 are fixed to brackets 7 by means of nuts 8, on which paired rollers 10 are mounted, which are pressed against each other by springs 11. Brackets 7 are fitted with a wedge 12, acting on which by a conical washer 13 pressed by bolts 14 to the flange 6, the rollers 10 can be set relative to the outer surface of section 2 in such a position that the angle formed by the rays passing through the center of the axis 9 and the middle The surface of the roller 10 was less than or equal to the angle of self-locking. The bottom tip 5 consists of a flange 15, on which four brackets 16 are mounted for movement in the radial direction. On the brackets 16, axles 18 are fastened with nuts 17, on which are mounted twin rollers 19, pressed from each other by springs 20. The brackets 16 are fitted with a wedge 21, which are acted upon by the conical pusher 22 moving along the pin 23 with the help of the nut 24, the rollers 19 can be set relative to the inner surface of the section so that the angle formed by the rays passing through the middle y-axis 18 and the center of the working surface of the roller 19 was less than or equal to the angle self-locking. After the telescope has been assembled with bolts 14 or a nut 24, a predetermined clamping of the paired rollers 10 and rollers 19 relative to the guides is provided. 1 hp f-ly, 4 ill.

Description

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konchnnikami (by themselves). The upper arm 4 consists of a flange 6, on which four KpoHDJTeHH 7s are mounted with the possibility of moving in the radial direction. On the brackets 7, with the help of nuts 8, axles 9 are fixed, on which the paired rollers 10 are mounted, pressed to each other by springs 11. Brackets 7 fitted with wedges 12, acting on which with a tapered face 13, pressed by bolts 14 to flange 6, rollers 10 can be positioned relative to the outer surface of section 2 in such a way that the angle formed by the rays passing through the center of the axis 9 and the middle of th surface roller 10, was less than or equal to the angle of self-locking. The lower tip 5 consists of a flange 15, on which with the possibility of movement in the radial

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The board has four brackets 16. Brackets 16 use nuts 17 to fasten axles 18, on which paired rollers 19 are mounted, pressed from each other by springs 20. Brackets 16 are fitted with wedges 21, which will act on a conical pusher 22 moving along a stud 23 s using the nut 24, it is possible to set the rollers 19 relative to the inner surface of the section so that the angle formed by the rays passing through the middle 5 of the axis 18 and the middle of the working surface of the roller 19 is less than or equal to the angle of the self-locking . After the telescope has been assembled with bolts 14 or nut 24, a predetermined clamping of the paired rollers 10 and rollers 19 relative to the guides is provided. 1 hp f-ly, 4 ill.

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The invention relates to a lifting device 1 HbuM devices and mechanisms, mainly to vertical telescopic lifts, and can be used. Early in all areas of the national economy.

The goal of the invention of image is to improve the operation of K /. performance by providing a continuous power contact between the working surface of the rollers and the support surface of the telescope section.

Figure 1 shows a telescopic lift, a general view; FIG. 2 shows the upper tip of the intermediate section and the lower tip of the upper section, side view of FIG. 3, view A in FIG. 2; figure 4 - view B in Fig, 2.

The roller bearing of the telescopic elevator, including, for example, the upper 1, middle 2 and lower 3 sliding sections, consists of the upper 4 and lower 5 tips.

In this case, the upper section 1, which carries the working platform, has only the lower tip 5, which interacts with the inner surface of the intermediate section 2, on which both the upper tip 4, which interacts with the outer surface of the upper section 1, and the lower end 5, which interacts with

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the inner surface of the lower intermediate section 2, etc. On the lower section 3, only the upper tip 4 is installed, which interacts with the outer surface of the last intermediate section 2, on which the lower tip 5 is installed, which interacts with the inner surface of the lower section 3.

The top tip 4 consists of a flange 6, on which, using, for example, a dovetail connection, four U-shaped brackets 7 are installed, evenly circumferentially spaced and able to move perpendicular to the axis of the telescope. In brackets 7, for example, axles 9 are fixed to axles 9, on which paired rollers 10 are mounted with the possibility of rotation and longitudinal movement, pressed together to each other by means of springs 11. Brackets 7 are fitted with wedges 12, which, interacting with a conical washer 13 pressed with bolts 14 to the flange 6, allow the brackets 7 with rollers 10 to move relative to the axis of the telescope and provide the necessary force to press the working surface of the rollers 10 to the outer surface of the corresponding section of the telescope, which allows the mouth to innovate

rollers 10 to the working position so that the central angle o formed by rays passing through the middle of the axis 9 and the middle of the working surface of the roller 10 is less than or equal to the angle of self-locking, and the rollers 10 of the upper tip 4 have a conical surface with an angle of inclination od about

The lower tip 5 consists of a flange 15, on which, for example, using dovetail connections, four U-shaped brackets 16 are installed, evenly circumferentially spaced and able to move perpendicular to the axis of the telescope. In the brackets 16, for example, axles 18 are fastened with nuts 17, on which paired rollers 19 pressed from each other by springs 20 are mounted for rotation and longitudinal movement. Brackets 16 are provided with wedges 21, which, 30

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The action with a conical pusher 22,25 corresponds to the angle of self-locking c. Moving along the pin 23 with the help of the nut 24, they allow the bracket 16 with the rollers 19 to move relative to the axis of the telescope and provide the necessary forces to press the working surface of the rollers 19 to the inner surface of the corresponding section of the telescope, which allows the rollers 10 to be set in the working position so that the central angle The oi formed by the rays passing through the middle of the axis 18 and the middle of the working surface of the roller 19 was less than or equal to the self-locking angle. Here, the working surface of the rollers 19 is a part of a sphere with a center located on the beam of the angle cvi passing through the middle of the working surface of the roller 19, then tangent to the. the surfaces of the roller 19 and the axis of rotation form an angle ei, oi.

The upper tip 4 is fixed to the opposite ends of the corresponding sections of the telescope with the help of flange 6 and the lower tip 5, and the assembly starts from the upper section 1, on which only the lower tip 5 is mounted. Leave the nut 24, we can move the crowns - Bars 16 to the center of the flange 15 and insert the upper section 1 together with the lower tip 5 into the intermediate section 2. Close the nut 24, move

Using a cable system or cylinders, the telescope assembled and installed vertically with a fixed working pad is moved apart by a buoy: cell, and the rollers 10 of the upper end 4 are rolled along the outer surface of the corresponding section of the scaffold, by matching or flow. Depending on whether the diameter of the section increases (in paragraphs of manufacturing tolerances or steel deviations from the shape) with respect to the mounting section. Similarly, the rollers 19 of the lower tip 5, rolling along the inner surface of the corresponding section of the telescope, also work.

With such an interaction between the ds rollers and the surface of the telescope sections, the main role is played by rolling force lO and 19 on the surface of TanecKoiia (K, - 0, U05 is the coefficient Tpeiii.;. Quality). rollers 10 and 19 not only burst, but also move along axis 9 and 18, tracking the change in the diameter of the pipe- (within the tolerance on and producing) from which the telescope is made, and the training force also participates in this process (K 0.15 is the coefficient of slip or slip), but in this case

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the conical pusher 22 is up and, acting on the wedge 21 of the U-shaped brackets 16, force the twin rollers 19 to move closer to each other, compressing the spring 2U.

The convergence of the rollers 19 continues until a predetermined size is established between them corresponding to the self-locking angle oi. Then, the lower tip 5 is installed on the intermediate section 2 and all operations are repeated first, and so on, until all sections are installed in the lower section 3.

The upper tips 4 are installed in the reverse order, with the help of screws 14, the conical washer 13 moves closer to the flange 6, thereby causing the rollers 10 to press the outer surface of the corresponding section of the telescope and push them to a predetermined distance which soot

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5 Corresponds to the angle of self-restraint in.

Using a cable system or hydraulic cylinders, the telescope assembled and installed in a vertical position with a fixed working platform is moved apart by a buoy: height, while the rollers 10 of the upper tip 4 are rolled along the outer surface of the corresponding section of the telescope, moving closer or consuming depending on whether the diameter of the section decreases or increases (within the tolerance for fabrication or magnetic deviations from the mold) relative to the installation section. Similarly, the rollers 19 of the lower tip 5, rolling along the inner surface of the corresponding section of the telescope, work.

With this interaction between the rollers and the surface of the telescope sections, the main role is played by the rolling friction force lO and 19 over the surface of TanecKoiia (K, - 0, U05 is the coefficient Tpeiii.;. Quality of ani), but because of the vertical movement of the rollers 10 and 19 not only they rotate, but also move along the axes 9 and 18, tracking the change in the diameter of the pipe- (within the manufacturing tolerance) from which the telescope section is made, the friction force of the slip is partially involved in this process (K 0.15 - the coefficient of friction slip) but in this case

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Claims (2)

1. Slmko for the support of the telescopic lift, containing running W / / v. self-adjusting rollers mounted on the axles of the brackets of one section, spring-loaded with an elastic element and interacting with the surface of the cylindrical guide of the other section with the possibility of rolling over it, and forming the undercarriage, the roller is shaped according to a curve that satisfies the condition that the pressure angle exceeds the friction angle in the zone the contact of the guide with the said roller, characterized in that, in order to improve the performance characteristics by providing a constant force contact between the working The surfaces of the rollers and guide are mounted on each axis by two rollers, which are spring-loaded from the inside by elastic elements. 2. The support according to claim 1, characterized in that each crown-. The matte is mounted with the possibility of compulsive radial movement perpendicular to the axis of the guide. /four 7D 1-di. 22 / J /four / 4s Ф (/ г.З ВидБ 21