RU2098252C1 - Section of carrier rollers - Google Patents

Abstract

FIELD: used in stands for installation and rotation of long cylindrical bodies from shells in process of their assembly and welding. SUBSTANCE: mounted on car are supports of rollers having spring-loaded lever with roller hinged to rest and mechanism for regulated motion of roller. Each pair is provided with a pair of levers hinged to rest. There are: lever with roller and additional lever. In each pair lever with roller is connected with lever by common hinge and flexible member engageable with the free end of lever. Mechanism for moving rollers is made in the form of double-seat crank mounted in rest supports and hinged by a rod to lever free end. Mechanism is provided with bushing-eccentric installed in rod hinge for regulated fixed turning on axle. EFFECT: extended technological capabilities due to provision of regulated interaction of rollers with article. 2 cl, 4 dwg

Description

 The invention relates to welding, in particular to roller bearings for installing and rotating housings from shells during assembly and welding, and is an improvement of the invention by ed. St. USSR N 1581544, class B 23 K 37/04, 1990.

 The composition of the specified known device includes mounted on carts, roller bearings, which contain mounted on a support rotary lever with a roller, spring-loaded packages of Belleville springs mounted on a support. Roller bearings are equipped with a mechanism for regulating the angular position of the lever with a roller relative to the axis of the caliper. This mechanism includes drive rotary axes, eccentrics fixed to them with supports interacting with the free end of the lever carrying the roller.

 These roller bearings do not have a sufficiently broad technological capabilities.

 In particular, they cannot be completely shut down from work (the contact of the roller with the surface of the product is interrupted) with the aim, for example, of redistributing the load on the non-drive and drive roller bearings remaining in the work.

 The problem to which the invention is directed, expanding technological capabilities by providing regulation of the interaction of the rollers with the surface of the products.

 To achieve this goal, sections of non-driven roller bearings containing a trolley with sliding roller bearings mounted on it, including a support and a rotary spring-loaded lever with a roller mounted on a support axis, a mechanism for adjustable angular movement of the lever with a roller, are made as follows.

 The roller bearings are equipped with a pair of pivotally mounted levers on the caliper. In each pair, the lever with the roller is connected to the additional lever by a common hinge and an elastic element fixed to the additional lever, made in a particular case of rubber plates. The mechanism of adjustable angular rotation of the levers is made in the form of a two-support crank mounted in the caliper supports, the finger of which is pivotally connected by means of a rod with an additional lever. In this case, the upper hinge is equipped with a sleeve with an eccentric mounted with the possibility of adjustable fixed rotation relative to the axis fixed on the additional lever.

 The main technical advantage of this design is to prevent the rollers from towing the drive section of the roller support located under the extreme shell of the long housing. To increase the traction of the drive rollers, several non-drive sections are turned off by turning the crank. In this case, the rod moves downward, the additional lever and the lever connected with it rotate through the elastic element of the lever with the roller.

 In addition, the proposed design allows the tuning movement of the rollers by turning and fixing eccentrically mounted on the axis of the sleeve. The adjusting movement of the rollers is necessary for the high-quality assembly of shells of different diameters (within the tolerance).

 A significant advantage of the design is the ability to reduce the metal consumption of the stand by halving the number of sections of the roller bearings needed to assemble the shells of a long body.

 This reduction is achieved by moving the end section of the roller support from one working position to another under the front shell attached to the body after completion of assembly and welding work on the previous joint of the shells. Thus, in two sections, there is only the shell that is attached to the housing, the remaining shells of the assembled housing are each based on one section of the roller support.

 To ensure high-quality assembly and reduce auxiliary time for the adjustable movement (rotation) of levers with rollers, the roller support section is equipped with a mechanism for synchronous rotation of both cranks of the roller support. This mechanism is made in the form of a gear pair of wheels mounted on a trolley and placed between the roller bearings. Each wheel of the pair is kinematically connected by a pivot-lever assembly with a crank shaft, and one of the gears is additionally engaged with a gear rack mounted on the trolley frame equipped with a screw mechanism for its movement mounted on the trolley frame.

 In FIG. 1 shows a roller support section, general view; in FIG. 2 side view; in FIG. 3, section AA in FIG. one; in FIG. 4 section roller support with a mechanism of simultaneous angular rotation of levers with rollers; in FIG. 5 a section BB in FIG. one; in FIG. 6 a section BB in FIG. 4.

 The proposed roller support section contains a trolley 2 mounted on a rail 1 with two roller bearings mounted on it 3. The roller bearings contain a support 4, an axis 5 fixed to the support and a lever 6 mounted on it with a roller 7. An additional lever 8. is mounted on the axis 5 the lever 8 is installed an elastic element 9, made in the particular case of rubber gaskets 10, compressed between the metal plates 11 by the screws 12. The upper plate 11 interacts with the free end of the lever 6.

 Each roller support is equipped with a mechanism 13 for turning a pair of levers 8, 6. This mechanism is made in the form of a crank 14 mounted in the supports 15 of the caliper 4. The crank pin 16 is pivotally connected to the lower end of the rod 17, the upper end of which is pivotally connected to the sleeve 18, the sleeve with an eccentric mounted with the possibility of adjustable rotation on the axis 19, which is fixed on the free end of the lever 8. When turning, the sleeve is fixed in one of the positions fixed on the sleeve by a retainer 20. On the sleeve and the lever is mounted a pointer with a scale of 21 angles company.

 To rotate the crank is a removable handle 22 mounted on the shaft of the crank.

 An emphasis 23 is fixed on the support, which is in contact with the crank when the rollers are in working position.

 The proposed sections are used in the stands when assembling and welding long casings 24 from shells, which can vary in diameter (within the tolerance).

 For the purpose of high-quality assembly and reduction of auxiliary time for adjusting the movement of the rollers 7 (turning the levers 6), carried out when the section is reinstalled from one working position to another, the roller support section is equipped with a mechanism for simultaneously rotating the roller support cranks (Fig. 4).

 This mechanism contains levers 25 fixed to the shafts of the cranks 14, pivotally connected using composite telescopic rods 26 with the fingers 27, mounted on the rims of the gears 28 of the pair. The gear pair is mounted on a rack 29, mounted on the trolley frame in the middle between the roller bearings 3. One of the gears, located below the other, is engaged with the gear rack 30. The rack is mounted on rollers 31 that are mounted on the rack 32, mounted on the frame of the trolley. The rack movement mechanism comprises a hollow rod 33 connected to the rack, at the opposite end of which a nut 34 is fixed. The nut is coupled to a screw 35 mounted in a support 36 fixed to the carriage frame. A scale with divisions is fixed on the frame, indicating the angle of rotation of the crank relative to its extreme working position, at which the crank contacts the stop 23 (the scale is not shown).

 The work of the sections of the roller stand is as follows.

 Before installing two sections on the rail track under the next shell, which has a deviation in diameter from the previous one, the position of all four rollers is adjusted by turning the sleeve 18 relative to axis 19 to the required angle, which is visually controlled on a scale of 21. At the same time, the levers 8 6 and the rollers 7 will occupy the required position, determined by the difference in diameters of the mating shells.

 With the planned rearrangement of the end section to a new working position, it is also necessary to take into account elastic deformation under load of the elastic elements 9 and rubber rims of the rollers 7, taking into account the need to maintain the position of the product axis 24 when the load on the rollers of the section remaining under the shell is doubled. To install the rollers of two sections under the attached shell, use the mechanism of simultaneous rotation of the cranks at the calculated required angle relative to their extreme working position.

 After completion of the assembly and welding operations over the joint by rotation of the screw 35, the cranks 14 of the remaining section are turned to the extreme working position until they contact the focus 23, and the cranks of the resettable section are turned into the idle position by the screw 35.

 When assembling and welding long housings such as, for example, columned apparatuses, the drive section of the roller support (not shown) located under the extreme shell of the housing may not provide rotation of the product without slipping. In order to prevent this, several sections located after the drive section are turned off by turning the cranks. This will redistribute the load on the remaining roller support sections and increase the pressure on the rollers of the drive section.

 As a result of the increased adhesion of the drive rollers to the surface of the product, slippage will be prevented.

Claims (2)

 1. A roller support section comprising a trolley with roller supports mounted on it, including a support and a spring-loaded lever pivotally connected to it with a roller, an adjustable roller movement mechanism, characterized in that the roller supports are equipped with a pair of pivotally mounted levers on each support, in each pair a lever with a roller connected to the additional lever by a common hinge and an elastic element fixed to the additional lever, and the mechanism for moving the rollers is made in the form of a crank mounted in the caliper supports, w pivotally connected by a rod with the free end of the additional lever, while the movement mechanism is equipped with a sleeve with an eccentric mounted on the axis of one of these hinges, which is mounted with the possibility of adjustable fixed rotation.  2. The section according to claim 1, characterized in that it is equipped with a mechanism of synchronously adjustable rotation of the cranks of the roller bearings, made in the form of a gear pair of wheels mounted on the frame of the cart between the roller bearings, each wheel of which is kinematically connected by a rod, articulated-lever unit with the crank shaft, and one of the wheels of the gear pair is additionally engaged with a gear rack mounted on the trolley frame equipped with a screw mechanism for its movement.

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