CN211117457U

CN211117457U - Split type herringbone gear shaft both sides gear key-free connection structure

Info

Publication number: CN211117457U
Application number: CN201922240876.4U
Authority: CN
Inventors: 武学思; 王亚楠; 晋星星; 倪智鹏; 马贤军
Original assignee: Dalian Huarui Heavy Industry Group Co Ltd
Current assignee: Dalian Huarui Heavy Industry Group Co Ltd
Priority date: 2019-12-14
Filing date: 2019-12-14
Publication date: 2020-07-28
Anticipated expiration: 2029-12-14

Abstract

The utility model discloses a split type herringbone gear shaft both sides gear does not have key-type connection structure, including the axle, just epaxial connecting axle sleeve of installing, connecting axle sleeve's both ends respectively the symmetry be provided with axle interference fit's helical gear I and helical gear II, connecting axle sleeve's both ends symmetrical processing has the axle sleeve keyway of radial setting, just helical gear I and helical gear II are being close to all process the pinhole on the axial lateral wall of one side of axle sleeve keyway, the one end setting of cylindric lock is in the pinhole, and follow the entering is worn out to the pinhole in the axle sleeve keyway, helical gear I and helical gear II make up into the herringbone tooth. The utility model discloses furthest's assurance fitting surface width under the certain circumstances of helical gear width to realize that transmission torque is more reliable, guaranteed herringbone tooth bilateral symmetry effectively, and two helical gear middle parts of axle do not have the fender shoulder, reduce the forging cost. The processing and the installation are convenient and quick, and the cost is low.

Description

Split type herringbone gear shaft both sides gear key-free connection structure

Technical Field

The utility model belongs to the technical field of the gear drive technique and specifically relates to a split type herringbone gear shaft both sides gear key-free connection structure.

Background

At present, in the field of large and medium-sized rolling mill gear boxes in the domestic metallurgical industry, the output torque is large, the size of a gear shaft is large accordingly, and herringbone teeth are mostly adopted. The tooth part of the gear shaft is required to be higher than the rest parts, the tooth part needs to be carburized and quenched, and the rest parts are made of more economical quenching and tempering materials, so that the output-stage gear shaft is usually in a split herringbone gear shaft type.

And the split type herringbone gear shaft is divided into a key connection type (shown in figure 1) which transmits torque simultaneously by means of key and interference fit and a non-key connection type (shown in figure 2) which transmits torque by means of interference fit only.

Due to the limitation of the space structure of the gear, there is often not enough space for mounting the key slot, and the key connection type shown in fig. 1 that depends on the key and the interference fit to transmit the torque simultaneously cannot meet the design requirement.

The keyless connection shown in figure 2, which relies solely on an interference fit to transmit torque, is now analyzed:

The two split helical gears are in interference connection with the shaft, key grooves are respectively processed on the end faces of the inner sides of the two gears, and key grooves are respectively processed on the two sides of the connecting shaft sleeve. The two flat keys are fixed in the key grooves of the shaft sleeve, which are equal to the width of the key, through bolts, and are embedded in the key grooves of the end faces of the two bevel gears, which are equal to the width of the key, respectively. Thereby realizing the alignment of the tooth parts at the two sides about the center line of the herringbone teeth.

However, in this method, a key groove needs to be machined on the end face of the gear, so that the width of the matching surface is reduced under the condition that the width of the gear is constant, and the machining is complicated.

SUMMERY OF THE UTILITY MODEL

According to the technical problem provided by the invention, the key-free connection structure of the gears on two sides of the split herringbone gear shaft is provided.

The utility model discloses a technical means as follows:

The utility model provides a split type herringbone gear axle both sides gear does not have key-type connection structure, includes the axle, just epaxial connection axle sleeve of installing, connection axle sleeve's both ends respectively the symmetry be provided with axle interference fit's helical gear I and helical gear II, connection axle sleeve's both ends symmetrical processing has the axle sleeve keyway of radial setting, just helical gear I and helical gear II are being close to processing has the pinhole on the axial lateral wall of one side of axle sleeve keyway, and the one end setting of cylindric lock is in the pinhole, and follow the pinhole is worn out to get into in the axle sleeve keyway, helical gear I and helical gear II make up into the herringbone tooth.

The width of the key groove of the shaft sleeve is matched with the outer diameter of the cylindrical pin.

The depth of the shaft sleeve key groove is larger than the length of the part of the cylindrical pin penetrating out of the pin hole.

And two axial end faces of the connecting shaft sleeve are respectively attached to the axial end faces of the helical gear I and the helical gear II.

The relative positions of the pin holes on the helical gear I and the helical gear II and the respective tooth parts are kept consistent, namely the longitudinal center lines of tooth crests of the helical gear I and the helical gear II pass through the circle center of the pin hole or the longitudinal center line of a tooth socket passes through the circle center of the pin hole, so that accurate positioning can be achieved, the helical gear I and the helical gear II are axially aligned, and errors are reduced. The spiral directions of the teeth of the bevel gear I and the bevel gear II are opposite.

The utility model has the advantages of it is following:

1. The width of the matching surface is ensured to the maximum extent under the condition of a certain width of the gear, so that the torque is transmitted more reliably.

2. Effectively ensuring the symmetry of the herringbone teeth on two sides.

3. The middle parts of the two helical gears of the shaft are not provided with retaining shoulders, so that the cost of the forged piece is reduced.

4. The processing and the installation are convenient and quick, and the cost is low.

Based on the reason, the utility model discloses can extensively promote in fields such as gear drive.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a key connection type structural schematic diagram of the split herringbone gear shaft in the background art of the present invention divided into a key connection type structural schematic diagram relying on a key and interference fit to transmit torque simultaneously and a non-key connection type structural schematic diagram relying on interference fit to transmit torque only.

Fig. 2 is a schematic diagram of a keyless connection structure in the background art of the present invention, which transmits torque by interference fit.

Fig. 3 is a schematic view of a split herringbone gear shaft two-side gear keyless connection structure according to an embodiment of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 3-4, a split herringbone gear shaft two-side gear key-free connection structure comprises a shaft 1, a connecting shaft sleeve 2 is installed on the shaft 1, two ends of the connecting shaft sleeve 2 are respectively and symmetrically provided with a helical gear I3 and a helical gear II 6 which are in interference fit with the shaft 1, two ends of the connecting shaft sleeve 2 are symmetrically processed with shaft sleeve key grooves 4 which are radially arranged, pin holes are processed on axial side walls of the helical gear I3 and the helical gear II 6, which are close to one side of the shaft sleeve key grooves 2, one end of a cylindrical pin 5 is arranged in the pin holes and penetrates out of the pin holes to enter the shaft sleeve key grooves 4, and the helical gear I3 and the helical gear II 6 are combined into herringbone teeth.

The width of the shaft sleeve key groove 4 is matched with the outer diameter of the cylindrical pin 5.

The depth of the shaft sleeve key groove 4 is larger than the length of the part of the cylindrical pin 5 penetrating out of the pin hole.

Two axial end faces of the connecting shaft sleeve 2 are respectively attached to the axial end faces of the helical gear I3 and the helical gear II 6.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a split type herringbone gear axle both sides gear does not have key-type connection structure, a serial communication port, including the axle, just epaxial connection axle sleeve of installing, connection axle sleeve's both ends symmetry respectively be provided with axle interference fit's helical gear I and helical gear II, connection axle sleeve's both ends symmetry processing has the axle sleeve keyway of radial setting, just helical gear I and helical gear II are being close to all process the pinhole on the axial lateral wall of one side of axle sleeve keyway, the one end setting of cylindric lock is in the pinhole, and follow the pinhole is worn out to get into in the axle sleeve keyway, helical gear I and helical gear II make up into the herringbone tooth.

2. The split herringbone gear shaft two-side gear key-free connection structure of claim 1, wherein: the width of the key groove of the shaft sleeve is matched with the outer diameter of the cylindrical pin.

3. The split herringbone gear shaft two-side gear key-free connection structure of claim 1, wherein: the depth of the shaft sleeve key groove is larger than the length of the part of the cylindrical pin penetrating out of the pin hole.

4. The split herringbone gear shaft two-side gear key-free connection structure of claim 1, wherein: and two axial end faces of the connecting shaft sleeve are respectively attached to the axial end faces of the helical gear I and the helical gear II.