Stand for mounting nuts on the mill rolls

 

(57) Abstract:

The invention relates to a mechanical Assembly production and can be used for screwing and unscrewing the large nut during installation and dismantling of pillows rolls with bearings. On the frame mounted rack, rotating bearing sleeve with a ring gear on the outer surface. On the inner surface of the sleeve has a seat under the nut. On the sleeve placed the clamp with hydraulic cylinders mounted on the frame. With a ring gear bushing interact two relatively rotatable clamp ratchet pawl with grooves provided with a drive rotation in the form of a power cylinder with a thrust and two levers with pins. Levers one end connected with the axes of the dogs, while others are mounted on axes on the deadlift. Closest to the power cylinder lever has the ability to linear movement relative to the rod. Between the axes of the thrust bearing levers with dogs, set the adjustment mechanism in the form of mixed couples "screw-nut". Nuts are rigidly connected to the axis of thrust, and the screws combined with traction and have a means of rotation. The result is the ability to compensate for inaccuracies of manufacture and Assembly, as well as wear and tear on for screwing and unscrewing the large nut when mounting the pillows with bearings and their dismantling.

Known wrench for mounting bearings on the mill rolls and dismantling them [1], containing mounted on the support rack, which is mounted for rotation sleeve with hole nut. In the sleeve pinned interacting with nut key.

Rotation of the sleeve wrench is transmitted from the cylinders through the reversible ratchet device, consisting of a covering sleeve and connected with the cylinder of the clamp attached to the collar of the dog and the switching mechanism of the dogs in the form of a power cylinder with a piston rod, geared with a pinion fixed on the dog.

The disadvantage of this design is that the transmission of dogs for more than a right angle 180othat significantly reduces performance.

Known stand for mounting nuts on the mill rolls [2], the construction of which was adopted as a prototype, containing mounted on the frame, the clamp cylinders, a rack mounted on the sleeve, with the outer surface of the ring gear, and an internal slot for the product, while the clamp is mounted on the sleeve and has mounted on it with a possibility of rotation about the axis of the two ratchet their the ideal rigidly mounted on the rod of the power cylinder rod and two levers with pins, located in the grooves of the dogs, while the levers one end connected with the axes of the dogs, and the other with a thrust, with the possibility of rotation relative to it, also the closest to the power cylinder lever has the ability to linear movement relative to the rod.

A disadvantage of this device is the complexity of manufacturing associated with the exact location of the dogs, and insufficient service life, since the wear of the elements of the mechanism is disturbed interaction of dogs with teeth, the crown and the device becomes impossible.

The problem solved by the invention is to provide opportunities for compensation of errors in manufacture and Assembly, as well as wear and tear of the elements of the mechanism during operation by adjusting the position of the dogs.

This problem is solved as follows.

The known device is equipped with an adjustment mechanism that includes a multi-directional pair screw-and-nut mounted between the axes of the bearing levers with dogs, while nuts are rigidly connected with the axles and screws combined into a single rod and provided with means for rotation.

The drawing shows a General view of the proposed device.

Stand DL is on to rotate the sleeve 3 with hole nut mill roll.

The sleeve 3 is placed covering her yoke 4, is associated with a pair of hydraulic cylinders 5, 6, pivotally connected with the frame 1.

Ratcheting pawl 7, 8 by means of hinges 9, 10 are connected with the levers 11, 12 mounted on the axle 13, 14, rigidly connected with nuts 15, 16, which interact with screws 17, 18, United in a single rod and provided with means for rotation in the head 19, while educated couples "screw-nut" have a different direction.

The axis 14 is rigidly connected with the rod of the power cylinder 20, a hinge mounted on the yoke 4.

Dogs 7,8, alternately interacting with a ring gear 21, which is made on the sleeve 3.

To limit the rotation angle of the dogs 7, 8 on the levers 11, 12 is provided by the pins 22 that communicates with the slots 23, made in the dogs 7,8.

The lever 12 hole 24 under the axle 14 is oval, which provides the linear movement of the lever relative to the thrust to avoid jamming.

The stand works as follows.

The inclusion of the power cylinder 20 to move its piston rod, the levers 11, 12 are rejected with dogs 7, 8, during the retraction of the rod of the dog 7 rotates and disengages from the crown 21 and the dog 8 size="ptx2">

When the extension of the piston rod 20 engages with a ring gear 21 includes a pawl 7 and the rotational movement of the sleeve 3 produce loosening of the nut.

When the wear of the elements of the mechanism in operation the rotation of the screw 19 change the distance between the axes 13, 14 and respectively between dogs 7, 8, ensuring the normal meshing them with a ring gear 21.

Similarly eliminated errors of manufacturing and Assembly.

Sources of information

1. The Japan patent N 53-40676, MKI 21 D 3/05.

2. Patent of Russia No. 2027576, MKI 23 P 19/08 (prototype).

Stand for mounting nuts on the mill rolls, containing a mounted on the frame rack on which the rotatably mounted sleeve, with the outer surface of the crown gear, and the inner seat under the nut placed on the sleeve clamp, equipped mounted on the frame by hydraulic cylinders, and two ratchet pawls with grooves that are installed on the axes can be rotated relative to the clamp and engagement with a ring gear of the sleeve and provided with a drive of rotation in the form of a power cylinder is rigidly connected to its rod and thrust of the two levers with pins, is the this the deadlift can be rotated relative to the last, and the nearest to the power cylinder lever placed with a possibility of linear movement relative to the thrust, characterized in that it is equipped with an adjustment mechanism mounted between the axes of the thrust bearing levers with dogs, and made in the form of mixed couples "screw-nut", with nuts mentioned pairs are rigidly connected to the axis of thrust, and the screws combined with traction and have a means of rotation.

 

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