CN217558813U

CN217558813U - Elastic flat key and elastic spline

Info

Publication number: CN217558813U
Application number: CN202221259537.6U
Authority: CN
Inventors: 王强
Original assignee: Changsha Shangcheng Electromechanical Equipment Co ltd
Current assignee: Changsha Shangcheng Electromechanical Equipment Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-11
Anticipated expiration: 2032-05-24

Abstract

The utility model discloses an elasticity parallel key and elastic spline, include: the key body comprises four side surfaces and two end surfaces, wherein two opposite side surfaces are two shearing surfaces which are used for bearing shearing force; the key groove is arranged on one side face of the key body, penetrates through two end faces of the key body, is positioned between the two shearing faces and is parallel to the shearing faces. The buffer can be provided for the transmission of the shaft, the flat key and the shaft sleeve, so that the service life of each part is prolonged. The utility model discloses use key transmission technical field.

Description

Elastic flat key and elastic spline

Technical Field

The utility model relates to a key transmission technical field especially relates to elasticity parallel key and elastic spline.

Background

The flat key is used as a transmission part between the shaft and the shaft sleeve, and is low in cost and reliable in structure, so that the flat key is in rigid connection with the shaft and the shaft sleeve in the mechanical transmission process, so that torque can be better transmitted, but when the shaft is in sudden stop, certain impact is easily generated between the shaft and the flat key, and the flat key groove in the shaft or the flat key groove in the shaft sleeve or the flat key is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an elasticity parallel key can provide the buffering for the transmission of axle, parallel key and axle sleeve to improve the life of each spare part.

An elastic spline is also provided, which comprises the elastic flat key.

The embodiment of the utility model provides an adopted technical scheme is: a resilient flat key comprising: the key body comprises two opposite shearing surfaces, two mounting surfaces and two end surfaces, the shearing surfaces are used for bearing shearing force, and a key groove is formed in the mounting surface and is parallel to the shearing surfaces and penetrates through the two end surfaces.

According to the utility model discloses elasticity flat key of first aspect embodiment has following beneficial effect at least: when flat key joint axle sleeve and output shaft, the two shear planes of flat key are as the pressure-bearing face, with transmission torque, and the keyway sets up towards the axle sleeve, and the degree of depth of keyway is greater than the degree of depth of installing to the axle sleeve internal key body, a part of keyway can be located the inside of output shaft promptly, and it is not equipped with keyway one side and sets up towards the output shaft, when the axle stops suddenly, the key body of axle sleeve pressurized side will compress the keyway under self elastic action, in order to provide the buffering, make the axle sleeve receive when assaulting, there is certain cushioning effect, and the flat key restores the original state under self elastic action after the buffering, in order to continue to use, can effectually prevent the mounting groove damage in the axle sleeve, make the axle sleeve more durable.

According to some embodiments of the invention, a first resilient coating is provided in the keyway.

According to some embodiments of the utility model, the bottom of keyway be equipped with keyway vertically through-hole, the through-hole runs through the two shear planes of the key body, just first elastic coating is covered with in the through-hole, and with the key body is fixed continuous.

According to some embodiments of the invention, at least one of the two shearing surfaces is provided with a second elastomeric coating.

According to some embodiments of the present invention, the two opposite groove walls of the key groove have a middle plane coinciding with the middle plane of the shear surface.

In an embodiment of the second aspect of the present invention, an elastic spline includes: spline key body and a plurality of key tooth, it is a plurality of the key tooth set up in on the perisporium of spline key body, and be located perpendicularly in the coplanar in spline key body axle center, the key tooth with the utility model discloses the structure of the flat key of elasticity be the same for the embodiment of the first aspect.

According to the utility model discloses the elastic spline of second aspect embodiment has following beneficial effect at least: the spline is only the expansion of the number of the flat keys, the essence of the spline is the same as that of the flat keys, namely the spline formed by a plurality of flat keys is arranged on the shaft, and the spline teeth of the spline are the same as the structure of the elastic flat keys, so that the buffering effect can be well played, and the service life of the shaft sleeve can be prolonged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an assembly schematic diagram of an elastic flat key, a shaft sleeve and an output shaft according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic view of an elastic flat key according to an embodiment of the present invention;

fig. 4 is an assembly schematic diagram of the elastic spline, the shaft sleeve and the output shaft of the embodiment of the present invention.

Reference numerals: 100-key body; 110-shear plane; 111-a second elastomeric coating; 120-keyway; 121-a first elastomeric coating; 200-shaft sleeve; 300-an output shaft; 400-spline key body; 410-spline teeth.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1, 2 and 3, in a specific embodiment of the first aspect of the present invention, an elastic flat key comprises:

the key body 100 includes two opposite shearing surfaces 110, two mounting surfaces and two end surfaces, the shearing surfaces 110 are used for bearing shearing force, one mounting surface is provided with a key groove 120, and the key groove 120 is parallel to the shearing surfaces 110 and penetrates through the two end surfaces.

Specifically, when the flat key is connected to the shaft sleeve 200 and the output shaft 300, the two shearing surfaces 110 of the flat key serve as bearing surfaces to transmit torque, and the key groove 120 is disposed toward the shaft sleeve 200, and the depth of the key groove 120 is greater than the depth of the key body 100 mounted in the shaft sleeve 200, that is, a part of the key groove 120 is located inside the output shaft 300, and the side of the key groove 120 not disposed therein is disposed toward the output shaft 300, when the vehicle stops suddenly, the key body 100 on the pressed side of the shaft sleeve 200 compresses the key groove 120 under the action of its own elasticity to provide a buffer, so that when the teeth of the shaft sleeve 200 are impacted, a certain buffer effect is achieved, and the mounting grooves in the shaft sleeve 200 and the output shaft 300 can be effectively prevented from being damaged.

In the working process of the flat key, when the flat key rotates along one direction, only one shearing face 110 is used as the pressure bearing face of the shaft sleeve 200 to transmit torque, and when the flat key rotates along the opposite direction, the other shearing face 110 is used as the pressure bearing face of the shaft sleeve 200 to transmit torque, and the transmission process is step-by-step variable speed adjustment, and the change of the speed is uniform, so that the pressure applied to the shearing face 110 as the pressure bearing face is gradually changed when the speed is changed, at this time, the influence of the key slot 120 on torque transmission hardly exists, but in the emergency stop process, the speed is suddenly reduced from a certain value to zero, so that the pressure is suddenly increased, and the rotation direction is opposite, at this time, the other shearing face 110 opposite to the shearing face 110 as the pressure bearing face of the shaft sleeve 200 is used for bearing pressure, the received force is also suddenly increased, at this time, the key body 100 is elastically deformed into the key slot 120 under the self elastic action, and the buffer is realized by the key slot 120.

In addition, the key groove 120 in fig. 1 is only a schematic view, and when the key body 100 is made of an elastic steel material, the key groove 120 may be elastically deformed by its own elasticity to absorb the shock, and at this time, the size of the actual key groove 120 is only 1 to 50 wires.

Referring to fig. 3, in some embodiments of the present invention, a first resilient coating 121 is disposed within the keyway 120.

Specifically, the first elastic coating 121 is disposed in the key groove 120 to enhance the overall structure of the key body 100, and meanwhile, the key groove 120 still has a buffering function through the first elastic coating 121, which is more convenient for practical use.

Referring to fig. 2, in some embodiments of the present invention, the bottom of the key groove 120 is provided with a through hole perpendicular to the key groove 120, the through hole penetrates through the two shearing surfaces 110 of the key body 100, and the first elastic coating 121 is distributed in the through hole and fixedly connected to the key body 100.

Specifically, the key body 100 of the flat key is divided into a first shaft sleeve 200 bearing part, a second shaft sleeve 200 bearing part and a bearing pressing part by arranging the key groove 120 and the through hole thereof, the first shaft sleeve 200 bearing part and the second shaft sleeve 200 bearing part are arranged above the bearing pressing part in parallel, a first elastic coating 121 is arranged at the joint of the first shaft sleeve 200 bearing part and the second shaft sleeve 200 bearing part and fixedly connected with the first elastic coating 121, and the first elastic coating 121 is integrally inverted T-shaped.

In addition, in this embodiment, the key body 100 is made of 45 # steel, the first elastic coating 121 is made of 65 # spring steel or rubber, the two are fixedly connected through super glue, and the surface subjected to the shearing force needs to use the super glue with strong shearing resistance.

Referring to fig. 2 and 3, in some embodiments of the present invention, at least one of the two shearing surfaces 110 is provided with a second elastomeric coating 111.

Specifically, by the second elastic coating 111 provided on the shearing surface 110, double buffering is achieved, so that the flat key is more strongly capable of receiving a pressing impact force when receiving an impact.

Wherein, the material of the second elastic coating 111 may be the same as the material of the first elastic coating 121.

Referring to fig. 2, in some embodiments of the present invention, the middle plane of the two opposing groove walls of the key slot 120 coincides with the middle plane of the two shearing surfaces 110.

Specifically, the key slot 120 is disposed on the middle plane, so that the bearing capacity of the key slot 120 to the two shearing surfaces 110 is the same, and the use is more convenient.

Referring to fig. 4, in a particular embodiment of the second aspect of the present invention, a resilient spline comprises: spline body 400 and a plurality of key teeth 410, a plurality of key teeth 410 are set up on the perisporium of spline body 400, and lie in the same plane perpendicular to the axle center of spline body 400, key teeth 410 is the same with the structure of the elastic flat key of the embodiment of the first aspect described above.

Specifically, the spline is equivalent to a plurality of flat keys arranged on the shaft, and only the number of the flat keys is developed, so that elastic buffering can be realized on the flat keys, and the spline teeth 410 of the spline can be the same as the flat keys in structure, and can better buffer the shaft sleeve 200 and the output shaft 300, play a role in protection, and prolong the service life of the shaft sleeve 200 and the output shaft 300.

Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. An elastic flat key, comprising:

the key body (100) comprises two opposite shearing surfaces (110), two mounting surfaces and two end surfaces, wherein the shearing surfaces (110) are used for bearing shearing force, one mounting surface is provided with a key groove (120), and the key groove (120) is parallel to the shearing surfaces (110) and penetrates through the two end surfaces.

2. The elastic flat key according to claim 1, wherein: a first elastic coating (121) is arranged in the key groove (120).

3. The elastic flat key according to claim 2, wherein: the bottom of the key groove (120) is provided with a through hole perpendicular to the key groove (120), the through hole penetrates through the two shearing surfaces (110) of the key body (100), and the first elastic coating (121) is fully distributed in the through hole and fixedly connected with the key body (100).

4. The elastic flat key according to claim 1, wherein: at least one of the two shearing surfaces (110) is provided with a second elastic coating (111).

5. The elastic flat key according to claim 1, wherein: the middle planes of the two opposite groove walls of the key groove (120) are superposed with the middle planes of the two shearing surfaces (110).

6. A resilient spline, comprising: the elastic flat key comprises a spline key body (400) and a plurality of key teeth (410), wherein the plurality of key teeth (410) are arranged on the peripheral wall of the spline key body (400) and are positioned in the same plane vertical to the axis of the spline key body (400), and the structure of the key teeth (410) is the same as that of the elastic flat key in any one of claims 1 to 5.