CN201431995Y

CN201431995Y - Fastening device for suspending central spindle at roller driving side of sendzimir mill

Info

Publication number: CN201431995Y
Application number: CN 200920123381
Authority: CN
Inventors: 李岳峰; 叶乃威
Original assignee: Ningbo Baoxin Stainless Steel Co Ltd
Current assignee: Ningbo Baoxin Stainless Steel Co Ltd
Priority date: 2009-06-23
Filing date: 2009-06-23
Publication date: 2010-03-31
Anticipated expiration: 2019-06-23

Abstract

The utility model relates to a fastening device for suspending a central spindle at a roller driving side of a sendzimir mill; at least two fastening nuts are arranged, and a clamping groove is arranged on each fastening nut, a screw hole is arranged on the fastening nut, and a clearance groove with 0.9-1.1mm of width is arranged radially on the fastening nut; the fastening device further comprises a locking washer, and axisymmetric splines are arranged on the locking washer, and the diameter of a circumferential surface of the spline is equal to or slightly more than the diameter of the circumferential surface of the clamping groove, and each pair of the spines are folded into an angle symmetrically, and the folding surface and a horizontal plane line form an included angle with 60-70 degrees, and the width of the spline is that the spline is justly embedded in the clamping groove of the fastening nut. Compared with the prior art, the fastening device has the advantages that: the double fastening nuts can lock the bearing and can achieve the purpose of rotating the bearing easily after the bearing is assembled; a fastening screw on the fastening nut is used for eliminating screw thread clearance of each nut, so as to improve the self-locking capacity; the locking washer is used for preventing the fastening nut from being loosed and is used as a connection tie of the two fastening nuts.

Description

Its roll transmission side of sendzimir mill hangs the fastener of mandrel

Technical field

The utility model relates to the fastener that its roll transmission side of a kind of sendzimir mill hangs mandrel.

Background technology

Sendzimir 20 (1ST) roller mill is the single chassis reversable mill.Roller pastern branch is made up of backing roll, two intermediate calender rolls, an intermediate calender rolls and working roll.They are at the distributing position of milling train schematic diagram as follows.Milling train maximum rolling force 800T.Maximum speed 800m/min.

The 1ST roller has 4 and distributes up and down, between working roll and two intermediate calender rolls.When working in milling train, be made up of 2 actions: the positive and negative rotation of roll and roll are moving at the string of axial direction.For carrying the active force of 2 directions, drop-hanger bearing is made up of 2 ball bearings and 2 plane bearings, and the locking mode of drop-hanger bearing is axially to tighten by a dextrorotation round nut, and adopt the axle head holding screw fixedly round nut prevent that it from becoming flexible.The end-play that must guarantee bearing in the round nut rundown process can easily rotate to guarantee the drop-hanger bearing overcoat, therefore can not overtorquing.There are two defectives in therefore this structural design.

1, when 1ST roller axial motion, move as Fig. 2 blue arrow direction, the thrust of oil cylinder will act on plane bearing and compress the previous section bearing by (red point) shaft shoulder among Fig. 2, and the gap of latter half bearing will become big simultaneously.Semi-pressed spring will discharge and remedy the gap that stays owing to after the bearing compression this moment, and the interior cover of ball bearing can not well compress stripped nut in this process.And milling train is a reversible rolling, when rolling direction and hand of spiral in the same way the time, loosening situation will oneself appear in action of inertia in nut, and under effect repeatedly and cut off the axle head holding screw, withstand the bearing block rear end cap at last, eliminate bearing clearance.Finally do not cause scaling loss, and then cause the milling train fire because of bearing has enough play,

2, second defective is in the intermediate calender rolls rotating running, and the axle head holding screw also loosening situation can occur by the same token.Holding screw can become flexible gradually, runs out at last., the holding screw inefficacy withstands the situation of bearing block rear end cap in case will causing round nut to occur becoming flexible.

Summary of the invention

Technical problem to be solved in the utility model is to provide at above-mentioned prior art present situation can easily turn round after the assembling of a kind of bearing and its roll transmission side of sendzimir mill that clamp nut can in use not occur becoming flexible hangs the fastener of mandrel.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: its roll transmission side of this sendzimir mill hangs the fastener of mandrel, include clamp nut, this clamp nut is twisted and is fixed on the mandrel of roll one end, and its sidepiece contacts together with the bearing side that is placed on the mandrel, it is characterized in that: described clamp nut has two at least, and have on its same periphery of each clamp nut in twos to a pair of several to axisymmetric draw-in groove, and wherein axially be provided with screw respectively in the left-right symmetry position of a draw-in groove at clamp nut, described screw is suitable with the trip bolt that can be tightened against wherein, and on the clamp nut and be positioned on the two screws side face on one side and radially have the wide clearance groove of 0.9～1.1mm, in this fastener, also include lock washer, this lock washer can be placed in the mandrel of roll, and on its same periphery, convex with in twos to a pair of several to axisymmetric spline, and the diameter of spline periphery is the diameter that equals or be slightly larger than the draw-in groove periphery, this every pair spline is converted into an angle symmetrically, angle between its folding face and the water line is 60～70 degree, and the width of spline is advisable for the draw-in groove that embeds clamp nut, when fastening, first clamp nut is tightened on the mandrel that rolls axle and is contacted mutually with bearing, then lock washer is inserted in a spline of lock washer is snapped in the draw-in groove of first clamp nut, on the screw of first clamp nut, be screwed into trip bolt again, then on mandrel, be screwed into second clamp nut, another spline of lock washer is snapped in the draw-in groove of second clamp nut.

As improvement, describedly severally can be preferably two pairs, and the symmetry axis of these two pairs of draw-in grooves is vertical mutually to draw-in groove.

Improve, described clamp nut one side is provided with the chamfering of annular again.

Compared with prior art, the utility model adopts clamp nut to have two at least, and have on its same periphery of each clamp nut in twos to a pair of several to axisymmetric draw-in groove, and wherein axially be provided with screw respectively in the left-right symmetry position of a draw-in groove at clamp nut, described screw is suitable with the trip bolt that can be tightened against wherein, and on the clamp nut and be positioned on the two screws side face on one side and radially have the wide clearance groove of 0.9～1.1mm, in this fastener, also include lock washer, this lock washer can be nested with in the mandrel of roll, and on its same periphery, convex with in twos to a pair of several to axisymmetric spline, and the diameter of spline periphery is the diameter that equals or be slightly larger than the draw-in groove periphery, this every pair spline to same edge break at angle, angle between its folding face and the water line is 60～70 degree, and the width of spline is advisable for the draw-in groove that embeds clamp nut.When fastening, first clamp nut is tightened on the mandrel that rolls axle and is contacted mutually with bearing, then lock washer is inserted in two splines of lock washer are snapped in the draw-in groove of clamp nut, on the screw of clamp nut, be screwed into trip bolt again, then on mandrel, be screwed into second clamp nut, and press closer together with first lock washer, second lock washer is inserted in the mandrel snaps in the draw-in groove of second clamp nut at last by spline.The advantage of this structure is: 1, the solid nut of two-restriction had both played the locking effect of bearing, can reach the purpose that can easily turn round after the bearing assembling again; 2, the trip bolt on the clamp nut is used to eliminate the thread pitch of each nut, improves self-lock ability; 3, lock washer is used to prevent that clamp nut is loosening, and plays the connection tie effect of two clamp nuts.Thereby realize easily to turn round after the bearing assembling and the effect become flexible can in use not appear in clamp nut.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment clamp nut;

Fig. 2 is along the cutaway view of A-A line among Fig. 1;

Fig. 3 is the structural representation of lock washer among the utility model embodiment;

Fig. 4 is along the cutaway view of B-B line among Fig. 3;

Fig. 5 is that the utility model embodiment is assembled in the structural representation on the mandrel;

Fig. 6 is the enlarged drawing of I portion among Fig. 5.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Extremely shown in Figure 6 as Fig. 1, its roll transmission side of the sendzimir mill of present embodiment hangs the fastener of mandrel 3, include clamp nut 1, this clamp nut 1 is twisted and is fixed on the mandrel 3 of roll one end, see Fig. 5 and shown in Figure 6, and its sidepiece contacts together with bearing 4 sides of being fixed on the saddle and be placed on the mandrel 3.Clamp nut 1 has two, and has on each clamp nut 1 its same periphery in twos and to be a pair of axisymmetric draw-in groove 12 of two couples, and the symmetry axis of these two pairs of draw-in grooves 12 is vertical mutually.One side of clamp nut 1 is provided with the chamfering 13 of annular, so that the lock washer upper spline embeds in the draw-in groove 12, wherein axially be provided with screw 11 respectively in the left-right symmetry position of a draw-in groove 12 at clamp nut 1, described screw 11 is suitable with the trip bolt that can be tightened against wherein, and on the clamp nut and be positioned on two screws 11 side face on one side and radially have the wide clearance groove of 0.9～1.1mm 14, in this fastener, also include lock washer 2, this lock washer 2 can be nested with in the mandrel of roll, and on its same periphery, convex with in twos to a pair of several to axisymmetric spline 21, and the diameter d 2 of spline 21 peripheries is for equaling or be slightly larger than the diameter d 1 of draw-in groove 12 peripheries, this every pair spline 21 is converted into an angle symmetrically, angle a between its folding face 22 and the water line is 60～70 degree, and the width h of spline 21 is advisable for the draw-in groove 12 that embeds clamp nut.When fastening, first clamp nut 1a tightens on the mandrel 3 that rolls axle and contacts mutually with bearing 4, then lock washer 2 being inserted in a spline 21 that makes lock washer 2 in the mandrel 3 snaps in the draw-in groove 12 of first clamp nut 1a, another spline (21) of lock washer 2 is snapped in the draw-in groove 12 of second clamp nut 1b, another spline 21 of lock washer 2 is snapped in the draw-in groove 12 of second clamp nut 1b.

Improvement project with the breaker roll locking mechanism elaborates again:

1, single clamp nut of locking usefulness is made to be into the solid nut structure of two-restriction, play self-locking action to prevent the loosening of circle clamp nut with the characteristic of utilizing the solid nut of two-restriction; Design processes the wide clearance groove of 1mm and two screws on each circle jack panel simultaneously, and two the little trip bolts of screwing on again after clamp nut is tightened make clamp nut produce distortion and eliminate thread pitch.

2, lock washer of assembling between two clamp nuts snaps in spline respectively in two draw-in grooves of symmetry of circular clamp nut during assembling, blocks to tighten nut and become flexible preventing.

When 3, assembling, what at first will consider when first clamp nut is tightened is to adjust bearing clearance can easily rotate to guarantee the drop-hanger bearing overcoat.Put into lock washer then, adjust the clamp nut position and make two splines of lock washer just in time snap in the nut draw-in groove, tighten the stove bolt on first nut again, make first nut location.Second nut of packing into then also twisted enough tightly, after stubborn the getting well spline snapped in the draw-in groove of second nut.

The material of clamp nut is: the modifier treatment of 45# steel.

The material of lock washer is: the SUS304 stainless steel.

Claims

1, its roll transmission side of a kind of sendzimir mill hangs the fastener of mandrel, include clamp nut (1), this clamp nut (1) is twisted and is fixed on the mandrel (3) of roll one end, and its sidepiece contacts together with bearing (4) side that is placed on the mandrel (3), it is characterized in that: described clamp nut (1) has two at least, and have on its same periphery of each clamp nut (1) in twos to a pair of several to axisymmetric draw-in groove (12), and wherein axially be provided with screw (11) respectively in the left-right symmetry position of a draw-in groove (12) at clamp nut (1), described screw (11) is suitable with the trip bolt that can be tightened against wherein, and go up and be positioned on two screws (11) side face on one side at clamp nut (1) and radially have the wide clearance groove of 0.9～1.1mm (14), in this fastener, also include lock washer (2), this lock washer (2) can be placed in the mandrel (3) of roll, and on its same periphery, convex with in twos to a pair of several to axisymmetric spline (21), and the diameter (d2) of spline (21) periphery is for equaling or be slightly larger than the diameter (d1) of draw-in groove (12) periphery, this every pair spline (21) is converted into an angle symmetrically, angle (a) between its folding face (22) and the water line is 60～70 degree, and the width (h) of spline (21) is advisable for the draw-in groove (12) that embeds clamp nut, when fastening, first clamp nut (1a) is tightened into the mandrel (3) that rolls axle and is upward contacted mutually with bearing (4), then lock washer (2) is inserted in the draw-in groove (12) that a spline (21) that makes lock washer (2) in the mandrel snaps in first clamp nut (1a), on the screw (11) of first clamp nut (1), be screwed into trip bolt again, then on mandrel (3), be screwed into second clamp nut (1b), another spline (21) of lock washer (2) is snapped in the draw-in groove (12) of second clamp nut (1b).

2, fastener according to claim 1 is characterized in that: described several be two pairs to draw-in groove (12), and the symmetry axis of these two pairs of draw-in grooves (12) is vertical mutually.

3, fastener according to claim 2 is characterized in that: described clamp nut (1) one side is provided with the chamfering (13) of annular.