CN215113949U

CN215113949U - Chain wheel mechanism for heating furnace door lifting device

Info

Publication number: CN215113949U
Application number: CN202120737948.0U
Authority: CN
Inventors: 成旭金; 陆大成; 向礼江; 周星
Original assignee: Chongqing CISDI Thermal and Environmental Engineering Co Ltd
Current assignee: Chongqing CISDI Thermal and Environmental Engineering Co Ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-12-10
Anticipated expiration: 2031-04-12

Abstract

The utility model relates to a chain wheel mechanism for a heating furnace door lifting device, belonging to the field of heating furnace mechanical equipment, comprising a chain wheel mandrel, a chain wheel arranged on the chain wheel mandrel, sliding bearing seats symmetrically arranged on the chain wheel mandrel at two sides of the chain wheel, and a base for installing the sliding bearing seats; one end of the chain wheel mandrel extends out of a corresponding sliding bearing seat to form an extension section, and a shaft shoulder is arranged on the extension section; a biaxial thrust structure is arranged corresponding to the shaft shoulder and comprises a split type connected clamping groove upper cover and a clamping groove base which are respectively arranged above and below the shaft shoulder, and the clamping groove base is arranged on the base; the clamping groove upper cover and the clamping groove base form a clamping groove in split joint, and the shaft shoulder is installed in the clamping groove to limit axial bidirectional thrust of the shaft shoulder and bear axial force. The chain wheel mechanism can bear axial load and eliminate wear of the bearing bush of the sliding bearing seat.

Description

Chain wheel mechanism for heating furnace door lifting device

Technical Field

The utility model belongs to heating furnace mechanical equipment field relates to a sprocket mechanism for heating furnace gate elevating gear.

Background

The furnace door lifting device is a key device in a heating furnace system of a hot rolling mill. As shown in figure 1, the device is arranged on the top and two sides of a furnace door frame at the charging and discharging end of a heating furnace and is used for lifting and descending the furnace door. The left and right oven doors are respectively hung on two chain wheels by two chains, and the lifting and descending of the oven doors are realized by hydraulic cylinders arranged at two sides of the frame to drive the chains. The furnace door lifting device comprises a hydraulic cylinder, a heavy-load transmission roller chain, a chain wheel mechanism, a furnace door and the like, wherein the chain wheel mechanism comprises a chain wheel mandrel, a chain wheel, two sets of sliding bearing seats, a base and the like which are symmetrically arranged as shown in figure 2.

In equipment use, the inner sides of the bearing bushes of the sliding bearing blocks are worn to different degrees. The phenomenon of extrusion friction between the shaft shoulder of the mandrel of the chain wheel mechanism and the end surface of the bearing bush is observed. The chain wheel mandrel bears the weight of the furnace door and also bears a larger axial force, so that the shaft shoulder and the bearing bush are rubbed. The long-term operation inevitably causes the bearing seat to lose efficacy and brings great potential safety hazard.

The reason for generating the axial force is analyzed, the furnace door is lifted and lowered by the flexible chain, the weight of the furnace door is about 10 tons, and slight shaking exists in the lifting and lowering processes of the furnace door, so that a large axial force is generated on the chain wheel. The existing chain wheel mechanism is supported by two sliding bearing seats which are symmetrically arranged, and cannot bear axial load.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a sprocket mechanism for heating furnace gate elevating gear solves traditional sprocket mechanism and can't bear the axial load and lead to the impaired problem of friction.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a chain wheel mechanism for a heating furnace door lifting device comprises a chain wheel mandrel, a chain wheel arranged on the chain wheel mandrel, sliding bearing seats symmetrically arranged on the chain wheel mandrel at two sides of the chain wheel, and a base for installing the sliding bearing seats; one end of the chain wheel mandrel extends out of a corresponding sliding bearing seat to form an extension section, and a shaft shoulder is arranged on the extension section; a biaxial thrust structure is arranged corresponding to the shaft shoulder and comprises a split type connected clamping groove upper cover and a clamping groove base which are respectively arranged above and below the shaft shoulder, and the clamping groove base is arranged on the base; the clamping groove upper cover and the clamping groove base form a clamping groove in split joint, and the shaft shoulder is installed in the clamping groove to limit axial bidirectional thrust of the shaft shoulder and bear axial force.

Furthermore, the shaft shoulder and the clamping groove are in clearance fit in the axial direction, and a gap exists in the radial direction, so that additional friction force is prevented from being increased.

Furthermore, a lubricating hole communicated with the clamping groove is formed in the top of the clamping groove upper cover, and a lubricating device is installed in the lubricating hole to introduce lubricating grease into the clamping groove; the clamping groove axially matched with the shaft shoulder is provided with the lubrication grooves which are distributed in a criss-cross mode on the surface, and lubricating grease flows along the lubrication grooves to lubricate the axial matching surface of the clamping groove and the shaft shoulder and reduce friction.

Furthermore, the sliding bearing seat is of a split structure which is connected up and down.

The beneficial effects of the utility model reside in that:

the utility model discloses add the long sprocket mandrel, make its one end extend corresponding sliding bearing seat, set up the shaft shoulder in the extension section to form the draw-in groove through draw-in groove upper cover and draw-in groove base, install the shaft shoulder in the draw-in groove, thereby it is spacing to carry out the biaxial thrust to the shaft shoulder, make whole sprocket mechanism possess the ability that bears certain axial load, the operating mode that adapts to the furnace gate and goes up and down. And the phenomenon of sliding bearing block bearing bush abrasion is eliminated, the equipment maintenance work is reduced, and the service life of the equipment is prolonged. In addition, the improved chain wheel mechanism can utilize the main structure form of the original chain wheel mechanism, and the equipment maintenance work and the type of spare parts are the same as those before the improvement. Moreover, the clamping groove and the sliding bearing seat are of split structures, and the installation and replacement operations are simple.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of the arrangement of the oven door lifting device;

FIG. 2 is a schematic structural view of a prior art sprocket mechanism;

FIG. 3 is a schematic structural view of the sprocket mechanism of the present invention;

fig. 4 is the structure schematic diagram of the upper cover of the clamping groove and the base of the clamping groove of the present invention.

Reference numerals: the chain wheel mechanism comprises a chain wheel mechanism 1, a chain wheel 2, a chain wheel mandrel 3, a sliding bearing seat 4, a lubricating device 5, a shaft shoulder 6, a clamping groove upper cover 7, a clamping groove base 8, a lubricating groove 9 and a base 10.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 3 to 4, a sprocket mechanism 1 for a furnace door lifting device of a heating furnace includes a sprocket spindle 3, a sprocket 2 mounted on the sprocket spindle 3, sliding bearing seats 4 symmetrically mounted on the sprocket spindle 3 at two sides of the sprocket 2, and a base 10 for mounting the sliding bearing seats 4.

Specifically, one end of the sprocket spindle 3 extends out of a corresponding sliding bearing seat 4 to form an extension section, and a shaft shoulder 6 is arranged on the extension section; a double-axial thrust structure is arranged corresponding to the shaft shoulder 6, the double-axial thrust structure comprises a clamping groove upper cover 7 and a clamping groove base 8 which are respectively arranged on the upper part and the lower part of the shaft shoulder 6 and are connected in a split mode, and the clamping groove base 8 is arranged on a base 10; the clamping groove upper cover 7 and the clamping groove base 8 form a clamping groove in split joint, and the shaft shoulder 6 is installed in the clamping groove to limit axial bidirectional thrust of the shaft shoulder 6 and bear axial force.

In this embodiment, the sliding bearing block 4 is a split structure connected up and down. The clamping groove and the sliding bearing seat 4 are both designed into split structures, so that the installation and replacement operation are convenient.

The shaft shoulder 6 is in clearance fit with the clamping groove in the axial direction, and a gap exists in the radial direction, so that additional friction force is prevented from being increased.

The top of the clamping groove upper cover 7 is provided with a lubricating hole communicated with the clamping groove, and a lubricating device 5 is arranged in the lubricating hole so as to introduce lubricating grease into the clamping groove; the clamping groove axially matched with the shaft shoulder 6 is provided with the lubrication grooves 9 which are distributed in a criss-cross mode on the surface, and lubricating grease flows along the lubrication grooves 9 to lubricate the axial matching surface of the clamping groove and the shaft shoulder 6 and reduce friction.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A chain wheel mechanism for a heating furnace door lifting device comprises a chain wheel mandrel, a chain wheel arranged on the chain wheel mandrel, sliding bearing seats symmetrically arranged on the chain wheel mandrel at two sides of the chain wheel, and a base for installing the sliding bearing seats; the method is characterized in that: one end of the chain wheel mandrel extends out of a corresponding sliding bearing seat to form an extension section, and a shaft shoulder is arranged on the extension section; a biaxial thrust structure is arranged corresponding to the shaft shoulder and comprises a split type connected clamping groove upper cover and a clamping groove base which are respectively arranged above and below the shaft shoulder, and the clamping groove base is arranged on the base; the clamping groove upper cover and the clamping groove base form a clamping groove in split joint, and the shaft shoulder is installed in the clamping groove to limit axial bidirectional thrust of the shaft shoulder and bear axial force.

2. The sprocket mechanism for a furnace door lifting device of a heating furnace according to claim 1, wherein: the shaft shoulder and the clamping groove are in clearance fit in the axial direction, and a gap exists in the radial direction, so that additional friction force is prevented from being increased.

3. The sprocket mechanism for a furnace door lifting device of a heating furnace according to claim 1, wherein: the top of the clamping groove upper cover is provided with a lubricating hole communicated with the clamping groove, and a lubricating device is arranged in the lubricating hole so as to introduce lubricating grease into the clamping groove; the clamping groove axially matched with the shaft shoulder is provided with the lubrication grooves which are distributed in a criss-cross mode on the surface, and lubricating grease flows along the lubrication grooves to lubricate the axial matching surface of the clamping groove and the shaft shoulder and reduce friction.

4. The sprocket mechanism for a furnace door lifting device of a heating furnace according to claim 1, wherein: the sliding bearing seat is of a split structure connected up and down.