CN216895252U

CN216895252U - Locking device

Info

Publication number: CN216895252U
Application number: CN202122905717.9U
Authority: CN
Inventors: 徐珂; 杜德浪; 贾甫; 周仁斌; 吴录亮; 江荣; 郭建彪; 沈宇轩
Original assignee: Taier Heavy Industry Co Ltd
Current assignee: Taier Heavy Industry Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-07-05
Anticipated expiration: 2031-11-22

Abstract

The utility model discloses a locking device which comprises a shaft sleeve, wherein a plurality of shaft sleeve through holes are formed in the circumference of the shaft sleeve, and a locking device assembly is arranged in each shaft sleeve through hole; the through hole of the shaft sleeve is a three-section step hole, and the aperture of the inner hole of the middle section is smaller than the apertures of the inner holes of the upper section and the lower section; the locking device assembly comprises a sleeve, a thimble and a pressing type locking assembly; the upper end of the sleeve is provided with a step flange structure which is attached to the step surface at the bottom of the inner hole at the upper section of the through hole of the shaft sleeve, the outer side of the lower end of the sleeve is in threaded connection with a locking nut at the inner hole at the lower section of the through hole of the shaft sleeve, and the bottom end of the sleeve is provided with a bottom through hole; the thimble and the interior wall of sleeve laminating and can reciprocate, and the top is connected with push type locking Assembly, and the bottom is equipped with the boss, and through push type locking Assembly control boss stretches out or retracts from the bottom through-hole. The locking device is used for locking the shaft sleeve and the roller, has a good waterproof effect, avoids bolt breakage, is convenient and accurate to install and disassemble, is high in efficiency, and meanwhile prolongs the service life and reliability of the locking device.

Description

Locking device

Technical Field

The utility model belongs to the technical field of transmission equipment, and relates to a locking device.

Background

With the continuous development of metallurgical transmission technology, the requirements on metallurgical transmission equipment are higher and higher, and new requirements are provided from the service life, stability and reliability of the equipment and the efficiency of installation and disassembly. For a rolling mill group, a cardan shaft is a key transmission part, and in order to prevent axial movement of a roller and a cardan shaft sleeve in a rolling process and keep the roller and the cardan shaft to integrally move during roller change maintenance, a locking device is usually arranged on the sleeve. As shown in fig. 1, the conventional locking device is connected with a shaft sleeve through a screw, and when roll replacement is subjected to axial impact, the situation of bolt breakage and locking failure is easy to occur; meanwhile, as the working condition of the metallurgical site is severe, the water vapor is large, so that the water enters the locking device to corrode, and the blocking condition occurs; in addition, due to the fact that the locking device has corresponding phase requirements during installation, the installation phase needs to be repeatedly confirmed, time and labor are wasted, efficiency is low, and overhauling progress is affected.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the background art, the utility model provides a locking device for locking a shaft sleeve and a roller, which has the advantages of good waterproof effect, bolt fracture prevention, convenience and accuracy in mounting and dismounting, high efficiency and prolonged service life and reliability.

The technical scheme for solving the technical problem of the utility model is as follows:

the utility model relates to a locking device which comprises a shaft sleeve, wherein a plurality of shaft sleeve through holes are uniformly formed in the shaft sleeve along the circumference, and a locking device assembly is arranged in each shaft sleeve through hole; the through hole of the shaft sleeve is a three-section step hole, and the aperture of the inner hole of the middle section is smaller than the apertures of the inner holes of the upper section and the lower section; the locking device assembly comprises a sleeve, a thimble and a pressing type locking assembly; the upper end of the sleeve is provided with a stepped flange structure which is attached to the stepped surface at the bottom of the inner hole at the upper section of the through hole of the shaft sleeve, the outer side of the lower end of the sleeve is in threaded connection with a locking nut at the inner hole at the lower section of the through hole of the shaft sleeve, and the bottom end of the sleeve is provided with a bottom through hole; the thimble and the inner wall of the sleeve are jointed and can move up and down, the top end of the thimble is movably connected with a pressing type locking component, the bottom end of the thimble is provided with a boss matched with the bottom through hole, and the boss can be controlled to extend out or retract from the bottom through hole by pressing the pressing type locking component.

As a further improvement of the technical scheme, a plurality of pin holes are formed in the step surface of the bottom of the inner hole at the upper section of the through hole of the shaft sleeve, connecting holes which are in one-to-one correspondence with the pin holes are formed in the step flange structure at the upper end of the sleeve, and a positioning pin is arranged in each corresponding connecting hole and each pin hole.

As a further improvement of the technical scheme, the bottom through hole is a non-circular hole.

As a further improvement of the technical scheme, the boss is provided with two inclined planes, and the angles of the two inclined planes are different.

As a further improvement of the technical scheme, one of the pin holes is in phase with one of the inclined planes on the boss.

As a further improvement of the technical scheme, a sealing element is arranged between the outer side of the thimble and the inner wall of the sleeve.

As a further improvement of the technical scheme, the pressing type locking assembly comprises a pressing pin, a pressing cover and a plurality of steel balls; the outer side of the gland is matched with the inner wall of the through hole of the shaft sleeve, a sealing ring is arranged between the outer side of the gland and the inner wall of the through hole of the shaft sleeve, the cover body of the gland is fixedly connected with the step flange structure at the upper end of the sleeve through a plurality of connecting bolts, the center of the cover body is provided with an axial through hole, the pressing pin is movably arranged, and the bottom of the cover body is provided with a clamping block along the edge of the axial through hole; an axial inner hole with the diameter larger than that of the axial through hole in the center of the gland is formed in the center of the upper part of the sleeve, an inward inclined surface is arranged at the edge of the top of the axial inner hole, and an arc groove with the same diameter as the steel ball is arranged below the inclined surface; the pressing pin is provided with an axial inner hole facing the upper part of the thimble, the diameter of the upper part of the pressing pin is smaller than that of the lower part of the pressing pin, the joint of the upper part and the lower part of the pressing pin is in slope transition, the upper part and the lower part of the pressing pin can be respectively and movably arranged in an axial through hole of the gland and the axial inner hole of the upper part of the thimble, and a spring is embedded and connected between the axial inner hole of the pressing pin and the axial inner hole of the upper part of the thimble; the steel balls are arranged in gaps among the gland, the sleeve and the pressing pin; and sealing elements are respectively arranged between the outer side of the upper part of the pressing pin and the inner side of the axial through hole of the gland as well as between the outer side of the lower part of the pressing pin and the inner side of the axial inner hole of the thimble.

As a further improvement of the technical scheme, the top end of the pressing pin is detachably provided with an end cover, the end cover is in threaded connection with the pressing pin, and the thread matching outer circle position of the end cover is provided with a positioning thread and a screw.

As a further improvement of the technical scheme, a sealing ring is arranged between the excircle of the end cover and the through hole of the shaft sleeve.

Compared with the prior art, the locking device has novel design and reasonable structure, adopts a mode of connecting the locking device and the shaft sleeve by a plurality of bolts different from the prior art, and effectively avoids the condition of bolt fracture; the axial movement of the locking device assembly is limited by adopting a stepped hole form on the shaft sleeve and matching with the locking nut, and the radial rotation of the locking device assembly is limited by the positioning pin; according to the utility model, the end cover and the sealing ring groove structure are added on the upper part of the pressing pin, so that the sealing effect of the locking device is improved, and meanwhile, the pressing control is facilitated; in addition, due to the phase relation between the positioning pin and the inclined plane arranged on the boss of the thimble, the phase position can be quickly determined only by installing the positioning pin, so that the assembly is convenient; in conclusion, the waterproof locking device has a good waterproof effect, avoids bolt breakage, is convenient and accurate to install and disassemble, is high in efficiency, prolongs the service life of the locking device, and improves the reliability of the locking device.

Drawings

FIG. 1 is a schematic structural view of a shaft sleeve locking device in the prior art;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is an enlarged schematic view at X in FIG. 2;

FIG. 4 is a schematic structural view of a through hole of a bushing;

FIG. 5 is a schematic view of the construction of the sleeve;

FIG. 6 is a schematic structural view of the thimble;

FIG. 7 is a schematic view of the gland;

in the figure: 1. a shaft sleeve; 2. an end cap; 3. a sleeve; 4. a screw; 5. pressing the pin; 6. a seal ring; 7. A gland; 8. positioning pins; 9. a spring; 10. a thimble; 11. locking the nut; 12. a bottom through hole; 13. a boss; 14. a shaft sleeve through hole; 15. a pin hole; 16. a bevel; 17. a clamping block; 18. steel balls; 19. an inclined surface; 20. an arc groove; 21. a connecting bolt; 22. a seal member; 23. and (4) a convex block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships are changed accordingly. The present invention is not described in detail, but is known to those skilled in the art.

As shown in fig. 1 to 7, the locking device of the present invention comprises a shaft sleeve 1, wherein a plurality of shaft sleeve through holes 14 are uniformly formed on the shaft sleeve 1 along the circumference, and a locking device assembly is arranged in each shaft sleeve through hole 14; the shaft sleeve through hole 14 is a three-section step hole, and the aperture of the inner hole of the middle section is smaller than the apertures of the inner holes of the upper section and the lower section; the locking device assembly comprises a sleeve 3, a thimble 10 and a pressing type locking assembly; the upper end of the sleeve 3 is provided with a step flange structure which is attached to the step surface at the bottom of the upper section inner hole of the shaft sleeve through hole 14, the outer side of the lower end of the sleeve is in threaded connection with a locking nut 11 at the lower section inner hole of the shaft sleeve through hole 14, after the locking nut 11 is screwed on the sleeve 3, the end surface does not exceed the lower section inner hole of the shaft sleeve through hole 14, the sleeve 3 cannot axially move through the locking nut 11, meanwhile, the situation of bolt breakage in the traditional technology is avoided through the connection mode, and meanwhile, the installation and disassembly are convenient; the bottom end of the sleeve 3 is provided with a bottom through hole 12; the thimble 10 is engaged with the inner wall of the sleeve 3 and can move up and down, the top end is movably connected with a press type locking component, the bottom end is provided with a boss 13 matched with the bottom through hole 12, the boss 13 can be controlled to extend out or retract from the bottom through hole 12 by pressing the press type locking component, so that the roller can be conveniently installed into the shaft sleeve and locked to the roller by each press type locking component.

In this embodiment, a plurality of pinhole 15 have been seted up to the upper segment hole bottom step face of axle sleeve through-hole 14, the step flange of sleeve 3 upper end is structural to be seted up with each pinhole 15 one-to-one's connecting hole, installs locating pin 8 in every corresponding connecting hole and the pinhole 15, through the setting of locating pin 8 for sleeve 3 can't radial movement.

Further, the bottom through hole 12 is a non-circular hole, the periphery of the boss 13 is matched with the bottom through hole 12, and the structure is also a non-circular structure, so that the thimble 10 can be effectively prevented from rotating radially. Furthermore, the two inclined surfaces 16 are arranged on the boss 13, the angles of the two inclined surfaces 16 are different, in addition, the phase of one of the pin holes 15 is consistent with that of one of the inclined surfaces 16 on the boss 13, so that the installation phase can be determined quickly and effectively during later assembly, the assembly efficiency is improved, and the assembly quality is ensured.

In order to improve the sealing effect of the present invention, a sealing member 22 is disposed between the outer side of the thimble 10 and the inner wall of the sleeve 3.

In this embodiment, the pressing type locking component comprises a pressing pin 5, a pressing cover 7 and a plurality of steel balls 18; the outer side of the gland 7 is matched with the inner wall of the shaft sleeve through hole 14, a sealing ring 6 is arranged between the outer side of the gland and the shaft sleeve through hole, the cover body of the gland is fixedly connected with a step flange structure at the upper end of the sleeve 3 through a plurality of connecting bolts 21, an axial through hole is formed in the center of the gland and is movably provided with the pressing pin 5, a clamping block 17 is arranged at the bottom of the gland along the edge of the axial through hole, the clamping block 17 comprises a plurality of convex blocks 23 uniformly arranged along the circumference, and the distance between every two adjacent convex blocks 23 is smaller than the diameter of the steel ball 18, so that the steel ball 18 can be clamped conveniently; an axial inner hole with the diameter larger than that of the axial through hole in the center of the gland 7 is formed in the center of the upper portion of the sleeve 3, an inward inclined surface 19 is arranged on the top edge of the axial inner hole, the distance between the inclined surface 19 and the fixture block 17 is smaller than the diameter of the steel ball 18, and an arc groove 20 with the same diameter as that of the steel ball 18 is arranged below the inclined surface 19; the pressing pin 5 is provided with an axial inner hole facing the upper part of the thimble 10, the diameter of the outer circle of the upper part of the pressing pin is smaller than that of the outer circle of the lower part of the pressing pin, the joint of the upper part and the lower part of the pressing pin is in transition through an inclined plane matched with the clamping block 17, the upper part and the lower part of the pressing pin can be respectively and movably arranged in an axial through hole of the pressing cover 7 and an axial inner hole of the upper part of the thimble 10, and a spring 9 is embedded and connected between the axial inner hole of the pressing pin and the axial inner hole of the upper part of the thimble 10; the steel balls 8 are arranged in gaps among the gland 7, the sleeve 3 and the pressing pin 5; sealing elements 22 are respectively arranged between the outer side of the upper part of the pressing pin 5 and the inner side of the axial through hole of the gland 7 and between the outer side of the lower part of the pressing pin 5 and the inner side of the axial inner hole of the thimble 10. When the roller locking device is used on the shaft sleeve 1, when the pressing pin 5 is not pressed, the pressing pin 5 extrudes each steel ball 18 to a position where the fixture block 17, the inclined surface 19 and the upper inclined surface of the pressing pin 5 are transited under the action of the spring 9, the roller arranged in the shaft sleeve 1 and the like, and at the moment, the pressing pin is in a locking state, and the boss 13 extends out of the through hole 12 at the bottom and is used for locking the roller arranged in the shaft sleeve 1; when the pressing pin 5 is pressed, the pressing pin 5 moves axially downwards, a gap between the upper part of the pressing pin 5 and the sleeve 3 is increased in the downward movement process, the steel ball 18 moves downwards to the position of the arc groove 20, the thimble 10 loses the blocking effect of the steel ball, the roller is disassembled at the moment, the thimble 10 can move upwards, and when the pressing pin 5 is loosened, the pressing pin 5 extrudes the steel ball 18 to the position of the clamping block 17 and the inclined surface 19 under the action of the spring 9 to be continuously in a locking state.

In this embodiment, for pressing of pressing round pin 5, the top of pressing round pin 5 can be dismantled and be provided with end cover 2, and the excircle of this end cover 2 is laminated mutually with the upper segment hole lateral wall of axle sleeve through-hole 14 for the press surface is the whole terminal surface of end cover, and the stress surface is bigger, and the more convenient to use hydraulic ram aims at the use, better on-the-spot operation requirement of satisfying.

In this embodiment, the end cap 2 is in threaded connection with the pressing pin 5, and the thread matching outer circle position is provided with a positioning thread and a screw 4, so that the end cap 2 is prevented from loosening.

Furthermore, a sealing ring 6 is arranged between the excircle of the end cover 2 and the shaft sleeve through hole 14, so that water vapor is prevented from entering and corroding, and the service life of the utility model is prolonged.

When the roller is installed, the hydraulic ejector is removed after the roller is installed in place, the steel balls are continuously extruded between the inclined surface of the sleeve and the clamping blocks under the action of the spring, and the roller is continuously locked by the boss extending from the through hole at the bottom.

Claims

1. The utility model provides a locking device, includes axle sleeve (1), evenly seted up a plurality of axle sleeve through-holes (14) along the circumference on axle sleeve (1), is provided with locking device subassembly, its characterized in that in every axle sleeve through-hole (14): the shaft sleeve through hole (14) is a three-section step hole, and the aperture of the inner hole of the middle section is smaller than the apertures of the inner holes of the upper section and the lower section; the locking device assembly comprises a sleeve (3), an ejector pin (10) and a pressing type locking assembly; the upper end of the sleeve (3) is provided with a step flange structure which is attached to the step surface at the bottom of the upper section inner hole of the shaft sleeve through hole (14), the outer side of the lower end of the sleeve is in threaded connection with a locking nut (11) at the lower section inner hole of the shaft sleeve through hole (14), and the bottom end of the sleeve is provided with a bottom through hole (12); the thimble (10) is jointed with the inner wall of the sleeve (3) and can move up and down, the top end of the thimble is movably connected with a pressing type locking component, the bottom end of the thimble is provided with a lug boss (13) matched with the bottom through hole (12), and the lug boss (13) can be controlled to extend out or retract from the bottom through hole (12) by pressing the pressing type locking component.

2. A locking device according to claim 1, characterized in that: the sleeve is characterized in that a plurality of pin holes (15) are formed in the step surface of the bottom of an inner hole at the upper section of the through hole (14) of the shaft sleeve, connecting holes corresponding to the pin holes (15) one to one are formed in the step flange at the upper end of the sleeve (3), and positioning pins (8) are installed in each corresponding connecting hole and each pin hole (15).

3. A locking device according to claim 2, characterized in that: the bottom through hole (12) is a non-circular hole.

4. A locking device according to claim 3, characterized in that: two inclined planes (16) are arranged on the boss (13), and the angles of the two inclined planes (16) are different.

5. A locking device according to claim 4, characterized in that: one of the pin holes (15) is in phase with one of the inclined surfaces (16) on the boss (13).

6. A locking device according to claim 4 or 5, characterized in that: a sealing element (22) is arranged between the outer side of the thimble (10) and the inner wall of the sleeve (3).

7. A locking device according to claim 6, characterized in that: the pressing type locking assembly comprises a pressing pin (5), a pressing cover (7) and a plurality of steel balls (18); the outer side of the gland (7) is matched with the inner wall of the shaft sleeve through hole (14), a sealing ring (6) is arranged between the outer side of the gland and the inner wall of the shaft sleeve through hole (14), the cover body of the gland is fixedly connected with a step flange structure at the upper end of the sleeve (3) through a plurality of connecting bolts (21), an axial through hole is formed in the center of the gland, the gland is movably provided with the pressing pin (5), and a clamping block (17) is arranged at the bottom of the gland along the edge of the axial through hole; an axial inner hole with the diameter larger than that of the axial through hole in the center of the gland (7) is formed in the center of the upper part of the sleeve (3), an inward inclined surface (19) is arranged at the top edge of the axial inner hole, and an arc groove (20) with the same diameter as the steel ball (18) is arranged below the inclined surface (19); the pressing pin (5) is provided with an axial inner hole facing the upper part of the thimble (10), the diameter of the upper part of the pressing pin is smaller than that of the lower part of the pressing pin, the joint of the upper part and the lower part of the pressing pin is in slope transition, the upper part and the lower part of the pressing pin can be respectively and movably arranged in an axial through hole of the gland (7) and an axial inner hole of the upper part of the thimble (10), and a spring (9) is embedded and connected between the axial inner hole and the axial inner hole of the upper part of the thimble (10); the steel balls (18) are arranged in gaps among the gland (7), the sleeve (3) and the pressing pin (5); sealing elements (22) are respectively arranged between the outer side of the upper part of the pressing pin (5) and the inner side of the axial through hole of the gland (7) and between the outer side of the lower part of the pressing pin (5) and the inner side of the axial inner hole of the thimble (10).

8. A locking device according to claim 7, characterized in that: the top end of the pressing pin (5) is detachably provided with an end cover (2), and the excircle of the end cover (2) is attached to the side wall of the inner hole of the upper section of the shaft sleeve through hole (14).

9. A locking device according to claim 8, wherein: the end cover (2) is in threaded connection with the pressing pin (5), and the thread matching outer circle position of the end cover is provided with a positioning thread and a screw (4).

10. A locking device according to claim 8 or 9, wherein: and a sealing ring (6) is arranged between the excircle of the end cover (2) and the shaft sleeve through hole (14).