CN213879451U

CN213879451U - Hollow shaft fixing device and motor

Info

Publication number: CN213879451U
Application number: CN202022759007.5U
Authority: CN
Inventors: 孟陈力; 杜爱娟; 闵健
Original assignee: Qingdao CCS Electric Corp
Current assignee: Qingdao CCS Electric Corp
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-08-03
Anticipated expiration: 2030-11-25

Abstract

The utility model relates to a hollow shaft fixing device and motor. The hollow shaft fixing device comprises a first end cover and a fixing cover, the first end cover is fixed on the casing, a fixing boss is arranged on the end face of the fixing cover, the outer diameter of the fixing boss is equal to the inner hole aperture of the hollow shaft, the fixing cover is fixed on the first end cover, a first through hole is formed in the first end cover, the fixing boss of the fixing cover enters the first through hole and is inserted into the inner hole of the hollow shaft, and the fixing cover is fixedly connected with the hollow shaft through threads. The utility model provides a hollow shaft fixing device and motor can fix the hollow shaft effectively.

Description

Hollow shaft fixing device and motor

Technical Field

The utility model relates to a fixed technical field of hollow shaft especially relates to a hollow shaft fixing device and have this hollow shaft fixing device's motor.

Background

In the process of long-distance transportation of large-scale equipment such as a motor and the like, because many parts are involved, each mechanical part has certain vibration. Especially, the rotating shaft is long in length direction and high in precision, and if a protection device is not added, axial movement and radial movement of the rotating shaft of the equipment can be caused, so that damage to a bearing of the equipment can be easily caused, abnormal sound of the bearing in operation and even failure of the bearing can be caused, and economic loss is caused. Therefore, the rotating shaft fixing device appears in the prior art.

For example, patent document CN210149927U discloses a transportation and fixing device for a rotating shaft of a diesel generator in a power station, which is used for solving the technical problem that the rotating shaft of the diesel generator cannot be effectively fixed in transportation, so that impact or vibration damage is caused to a bearing bush of the rotating shaft, and further, abnormal abrasion of the shaft journal of the rotating shaft is caused. The fixing device comprises a fixing rod and a fixing frame, wherein the fixing frame is arranged on the coupler, and one end of the fixing rod is arranged in a jackscrew hole of the end cover of the generator; the fixing frame is fixed on the end cover of the generator through being in threaded connection with the fixing rod. The device realizes the fixation of the rotating shaft of the diesel generator through the fixing frame and the fixing rod, but the fixing mode is only fixed aiming at the solid shaft.

At present, only a fixing mode aiming at a solid shaft exists in the prior art, and the fixing mode cannot be suitable for fixing a hollow shaft.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is an object of the present invention to provide a hollow shaft fixing device that can effectively fix a hollow shaft.

In order to realize the above object, the utility model provides a hollow shaft fixing device, including first end cover and fixed lid, first end cover is fixed on the casing, be equipped with fixed boss on the terminal surface of fixed lid, the external diameter of fixed boss equals with the hole aperture of hollow shaft, fixed lid is fixed first end cover is last, be provided with first through-hole on the first end cover, the fixed boss of fixed lid gets into first through-hole and insert in the hole of hollow shaft, fixed lid with the hollow shaft passes through screw thread fixed connection.

In one embodiment, the fixing boss is cylindrical.

In one embodiment, the fixing cover is disc-shaped, the fixing boss is coaxially arranged with the fixing cover, and the fixing cover closes the first through hole.

In one embodiment, the fixing cover is provided with a plurality of first mounting holes, the plurality of first mounting holes are uniformly distributed around the axis of the fixing cover, and the fixing cover is fixedly connected with the hollow shaft through bolts mounted in the first mounting holes.

In one embodiment, the hollow shaft fixing device further includes a second end cover, the first end cover is fixed to the casing through the second end cover, the second end cover is fixed to the casing, the second end cover is provided with a second through hole, the first end cover is fixed to the second end cover, an end portion of the hollow shaft extends into the second through hole, and a bearing is fixedly installed between the second end cover and the hollow shaft.

In one embodiment, the end face of the second end cover is provided with a mounting groove, the mounting groove is circular, the outer diameter of the first end cover is equal to the bore diameter of the mounting groove, and the first end cover is mounted in the mounting groove.

In one embodiment, the fixing cover is provided with a fixing boss, the fixing boss is arranged on the first end cover, the fixing boss is arranged on the end face of the fixing cover, the fixing boss is arranged on the fixing cover, and the fixing boss is arranged on the fixing cover.

In one embodiment, a positioning groove for accommodating the positioning ring is formed in the end surface of the first end cover, a plane of a groove bottom surface of the positioning groove is a plane perpendicular to the axis of the first end cover, and the end surface of the positioning ring is attached to the groove bottom surface of the positioning groove.

In one embodiment, the fixed cover is provided with an oil hole.

The utility model is different from the prior art in that, the utility model provides a hollow shaft fixing device is through fixing first end cover on the casing, and fix fixed lid on first end cover, the external diameter of the boss of fixed lid is the same with the hole aperture of hollow shaft and insert in the hole of hollow shaft, with the hole cooperation of hollow shaft, can realize the accurate fixed to the hollow shaft, fixed lid still passes through bolt fixed connection with the hollow shaft simultaneously, be connected through the cooperation of boss and fixed lid with the hollow shaft, can closely fix hollow shaft and casing, avoid the condition of axial float and radial float to appear in the hollow shaft. Therefore, the utility model provides a hollow shaft fixing device can fix the hollow shaft effectively.

Another object of the utility model is to provide a motor can guarantee the firm fixed of cavity mandrel in the transportation, avoids the bearing damage.

In order to achieve the above purpose, the technical solution of the present invention is realized as follows:

an electric motor comprises a housing, a hollow shaft rotatably mounted in the housing, and a hollow shaft fixing device, the hollow shaft fixing device comprises a first end cover, a second end cover and a fixing cover, the second end cover is fixedly arranged on the machine shell, the second end cover is provided with a second through hole, the end part of the hollow shaft extends into the second through hole, a bearing is fixedly arranged between the second end cover and the hollow shaft, the first end cover is fixedly arranged on the second end cover, the first end cover is provided with a first through hole, the end surface of the fixed cover is provided with a fixed boss, the outer diameter of the fixed boss is equal to the bore diameter of the inner bore of the hollow shaft, the fixing cover is fixed on the first end cover, a fixing boss of the fixing cover enters the first through hole and is inserted into an inner hole of the hollow shaft, and the fixing cover is fixedly connected with the hollow shaft through a bolt.

The motor has the same technical advantages as the hollow shaft fixing device in the prior art, and the description is omitted.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a schematic view illustrating an installation structure of a hollow shaft fixing device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the stationary cover;

fig. 3 is a view of the stationary cover in the axial direction thereof;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3; and

FIG. 5 is a schematic view of the structure of the motor with the hollow shaft fixture installed;

description of reference numerals:

1-a first end cap; 11-a positioning groove; 2-fixing the cover; 21-fixing the boss; 22-a first mounting hole; 23-a positioning ring; 24-oil holes; 3-a second end cap; 4-a housing; 5-a hollow shaft; 6-bearing.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.

In the present invention, some orientation words are defined, and in the case where no opposite explanation is made, the use of the orientation words such as "left and right" means that the hollow shaft fixing device provided by the present invention is defined in the normal use condition, and is consistent with the left and right direction shown in fig. 1. The term "inner and outer" refers to the inner and outer contours of the respective component parts. These directional terms are used for ease of understanding and are not intended to limit the scope of the present invention.

In addition, the terms "first" or "second", etc. used in this specification are used to refer to numbers or ordinal terms for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.

Referring to fig. 1 as appropriate, the present invention provides a hollow shaft fastening device of a basic embodiment, which includes a first end cap 1 and a fastening cap 2, wherein the first end cap 1 may be fastened to a housing 4 by bolts. Referring to fig. 4, a fixing boss 21 is provided on an end surface of the fixing cover 2, and an outer diameter of the fixing boss 21 is equal to an inner hole diameter of the hollow shaft 5. The fixing boss 21 and the fixing cover 2 are preferably of an integral structure and may be formed by machining or the like.

The fixing cover 2 is fixed on the first end cover 1 through a bolt, a first through hole is formed in the first end cover 1, and the fixing boss 21 of the fixing cover 2 enters the first through hole and is inserted into the inner hole of the hollow shaft 5. Wherein the insertion of the fixing boss 21 into the first through hole and into the inner hole of the hollow shaft 5 may include: the end part of the hollow shaft 5 is not inserted into the first through hole, or is partially inserted into the first through hole, or the hollow shaft 5 passes through the first through hole; the fixing boss 21 is then inserted into the inner bore of the hollow shaft 5. As shown in fig. 1, the right end of the hollow shaft 5 preferably protrudes into the first through hole, so that the fastening projection 21 on the fastening cover 2 fits into the hollow shaft 5. The end part of the hollow shaft 5 is provided with a bolt hole, and the fixed cover 2 is fixedly connected with the hollow shaft 5 through a bolt.

The hollow shaft fixing device provided by the above basic embodiment fixes the first end cover 1 on the casing 4, and fixes the fixing cover 2 on the first end cover 1, the outer diameter of the fixing boss 21 arranged on the fixing cover 2 is the same as the inner hole aperture of the hollow shaft 5 and is inserted into the inner hole of the hollow shaft 5, and is matched with the inner hole of the hollow shaft 5, so that the radial play of the hollow shaft 5 can be avoided, meanwhile, the fixing cover 2 is also fixedly connected with the hollow shaft 5 through bolts, therefore, the hollow shaft 5 and the casing 4 can be tightly fixed, and the damage of equipment caused by the play of the hollow shaft 5 is avoided.

The utility model discloses in, fixed boss 21 can only laminate with the partial pore wall part of hollow shaft 5 hole in order to realize fixed with the cooperation of hollow shaft 5 holes, for example fixed boss 21 can be semi-cylindrical. The fixing boss 21 can also be completely attached to the hole wall of the inner hole of the hollow shaft 5, and the fixing boss 21 is cylindrical. In one embodiment, as shown in fig. 4, the fixing boss 21 is cylindrical.

As shown in fig. 2 and 3, in a preferred embodiment of the present invention, the fixing cover 2 is disc-shaped, and the fixing boss 21 is coaxially disposed with the fixing cover 2. The thickness of the fixing boss 21 is preferably substantially equal to that of the fixing cover 2, thereby facilitating transportation and assembly. The thickness of the fixing boss 21 and the fixing cover 2 refers to the length of the fixing boss 21 and the fixing cover 2 along the axial direction of the fixing cover 2. When the fixing cap 2 is mounted on the first end cap 1, the fixing cap 2 closes the first through hole. The fixing cover 2 with the structure can realize the fixation of the hollow shaft 5 and the sealing of the hollow rotating shaft of the equipment, thereby preventing the damage and the pollution of the hollow rotating shaft.

As shown in fig. 2, a plurality of first mounting holes 22 are formed in the fixed cover 2, the plurality of first mounting holes 22 are uniformly distributed around the axis of the fixed cover 2, and the fixed cover 2 is fixedly connected to the hollow shaft 5 through bolts installed in the first mounting holes 22. The number of the first mounting holes 22 is preferably 8.

As shown in fig. 1, in a preferred embodiment of the present invention, the hollow shaft fixing device further includes a second end cap 3, and the first end cap 1 is fixed on the housing 4 through the second end cap 3. The second end cover 3 is fixed on the machine shell 4 through bolts, and a sealing ring is arranged between the second end cover 3 and the machine shell 4. The second end cover 3 is provided with a second through hole, the first end cover 1 is fixed on the second end cover 3, a sealing ring is also arranged between the first end cover 1 and the second end cover 3, the end part of the hollow shaft 5 extends into the second through hole, and a bearing 6 is fixedly arranged between the second end cover 3 and the hollow shaft 5. By providing the second end cap 3 and mounting the bearing 6 between the second end cap 3 and the hollow shaft 5, the stability of the hollow shaft 5 can be ensured.

As shown in fig. 1, an installation groove is formed in the end surface of the second end cap 3, the installation groove is circular, the outer diameter of the first end cap 1 is equal to the aperture of the installation groove, and the first end cap 1 is installed in the installation groove. Through set up the mounting groove on second end cover 3 to install first end cover 1 in the mounting groove, can make things convenient for the equipment of first end cover 1. And the end face of the first end cover 1 can also play a role in fixing the outer ring of the bearing 6 by arranging the mounting groove.

The end face of the fixing cover 2 provided with the fixing boss 21 is further provided with a positioning ring 23, as shown in fig. 4, the positioning ring 23 and the fixing boss 21 are both located on the left end face of the fixing cover 2, the positioning ring 23 is located on the outer side of the fixing boss 21, that is, the fixing boss 21 is located in the positioning ring 23. The thickness of holding ring 23 is less than the thickness of fixed boss 21, fixed lid 2 fixed mounting when on the first end cover 1, the terminal surface of holding ring 23 with the terminal surface laminating of first end cover 1. The thickness of the positioning ring 23 is smaller than that of the fixing boss 21, and when the fixing cover 2 is mounted on the first end cap 1, a gap can be formed between the end surface of the fixing cover 2 and the hollow shaft 5 after the fixing boss 21 is inserted into the hollow shaft 5, so that the processing precision of the fixing cover 2 can be reduced, and the production cost can be reduced.

Further preferably, the end surface of the first end cap 1 is provided with a positioning groove 11 for accommodating the positioning ring 23, the plane where the groove bottom surface of the positioning groove 11 is located is perpendicular to the plane of the axis of the first end cap 1, and the end surface of the positioning ring 23 is attached to the groove bottom surface of the positioning groove 11. The positioning groove is formed in the first end cover 1, so that the fixed cover 2 can be assembled more conveniently.

For maintenance of the equipment, as shown in fig. 2, 3 and 5, an oil hole 24 is opened in the fixing cap 2 to mount an oil cup.

Based on the technical concept, the utility model also provides a motor, as shown in fig. 1, fig. 5, the motor includes casing 4, rotationally installs hollow shaft 5 and hollow shaft fixing device in casing 4. The hollow shaft fixing device comprises a first end cover 1, a second end cover 3 and a fixing cover 2. The second end cover 3 is fixedly installed on the machine shell 4 through bolts, and a sealing ring is arranged between the second end cover and the machine shell 4. The second end cover 3 is provided with a second through hole, the end part of the hollow shaft 5 extends into the second through hole, and a bearing 6 is fixedly arranged between the second end cover 3 and the hollow shaft 5.

The first end cover 1 is fixedly installed on the second end cover 3, preferably, an installation groove is formed in the right end face of the second end cover 3, the first end cover 1 is installed in the installation groove, and the first end cover 1 tightly supports the outer ring of the bearing 6. The first end cover 1 is provided with a first through hole, the end face of the fixed cover 2 is provided with a fixed boss 21, the outer diameter of the fixed boss 21 is equal to the bore diameter of the inner bore of the hollow shaft 5, the fixed cover 2 is fixed on the first end cover 1, the fixed boss 21 of the fixed cover 2 enters the first through hole and is inserted into the inner bore of the hollow shaft 5, and the fixed cover 2 is fixedly connected with the hollow shaft 5 through a bolt.

The utility model provides a hollow shaft fixing device and motor have realized the fixed to the hollow rotating shaft, have prevented the rotation of pivot, have protected the bearing, have realized simultaneously the sealed to the hollow rotating shaft of motor, prevent the damage and the pollution of pivot.

While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. The following claims are intended to define the scope of the invention and, therefore, to cover module compositions, equivalents, or alternatives falling within the scope of these claims.

Claims

1. The utility model provides a hollow shaft fixing device, its characterized in that, includes first end cover (1) and fixed lid (2), first end cover (1) is fixed on casing (4), be equipped with fixed boss (21) on the terminal surface of fixed lid (2), the external diameter of fixed boss (21) equals with the hole aperture of hollow shaft (5), fixed lid (2) are fixed on first end cover (1), be provided with first through-hole on first end cover (1), fixed boss (21) of fixed lid (2) get into first through-hole and insert in the hole of hollow shaft (5), fixed lid (2) with hollow shaft (5) pass through screw thread fixed connection.

2. A hollow axle fastening device according to claim 1, characterised in that the fastening boss (21) is cylindrical and the fastening cover (2) is fixedly connected to the hollow axle (5) by means of bolts.

3. A hollow axle fixing device according to claim 2, characterised in that the fixing cover (2) is disc-shaped, the fixing boss (21) being arranged coaxially with the fixing cover (2), the fixing cover (2) closing the first through hole.

4. A hollow axle fastening device according to claim 3, wherein the fastening cover (2) has a plurality of first mounting holes (22) formed therein, the plurality of first mounting holes (22) being evenly distributed around the axis of the fastening cover (2), the fastening cover (2) being fixedly connected to the hollow axle (5) by means of bolts fitted into the first mounting holes (22).

5. The hollow shaft fixing device according to any one of claims 1 to 4, further comprising a second end cover (3), wherein the first end cover (1) is fixed on the casing (4) through the second end cover (3), the second end cover (3) is fixed on the casing (4), a second through hole is formed in the second end cover (3), the first end cover (1) is fixed on the second end cover (3), the end of the hollow shaft (5) extends into the second through hole, and a bearing (6) is fixedly mounted between the second end cover (3) and the hollow shaft (5).

6. A hollow shaft fixing device according to claim 5, characterized in that the end face of the second end cover (3) is provided with a mounting groove, the shape of the mounting groove is circular, the outer diameter of the first end cover (1) is equal to the bore diameter of the mounting groove, and the first end cover (1) is mounted in the mounting groove.

7. A hollow shaft fixing device according to claim 5, characterized in that a positioning ring (23) is further disposed on the end face of the fixing cover (2) provided with the fixing boss (21), the positioning ring (23) is located outside the fixing boss (21), the thickness of the positioning ring (23) is smaller than that of the fixing boss (21), and when the fixing cover (2) is fixedly mounted on the first end cover (1), the end face of the positioning ring (23) is attached to the end face of the first end cover (1).

8. The hollow shaft fixing device according to claim 7, characterized in that the end face of the first end cover (1) is provided with a positioning groove (11) for accommodating the positioning ring (23), the plane of the groove bottom surface of the positioning groove (11) is a plane perpendicular to the axis of the first end cover (1), and the end face of the positioning ring (23) is attached to the groove bottom surface of the positioning groove (11).

9. A hollow shaft fastening device according to claim 3, characterised in that the fastening cover (2) is provided with an oil hole (24).

10. The utility model provides a motor, its characterized in that, the motor includes casing (4), rotationally installs hollow shaft (5) and hollow shaft fixing device in casing (4), hollow shaft fixing device includes first end cover (1), second end cover (3) and fixed lid (2), second end cover (3) fixed mounting on casing (4), second end cover (3) have the second through-hole, the tip of hollow shaft (5) stretches into in the second through-hole, fixed mounting has bearing (6) between second end cover (3) and hollow shaft (5), first end cover (1) fixed mounting on second end cover (3), first end cover (1) has the first through-hole, be equipped with fixed boss (21) on the terminal surface of fixed lid (2), the external diameter of fixed boss (21) equals with the hole aperture of hollow shaft (5), the fixing cover (2) is fixed on the first end cover (1), a fixing boss (21) of the fixing cover (2) enters the first through hole and is inserted into an inner hole of the hollow shaft (5), and the fixing cover (2) is fixedly connected with the hollow shaft (5) through bolts.