CN220107751U - Locking sealing structure for motor bearing - Google Patents

Abstract

The utility model discloses a locking sealing structure for a motor bearing, which comprises a rotating shaft and a bearing sleeved on the rotating shaft, wherein a locking nut is sleeved on the rotating shaft, the locking nut is positioned at the outer end of the bearing, an annular groove is arranged on the side wall of the locking nut, a threaded hole is arranged on the outer end face of the locking nut, the threaded hole penetrates through the annular groove, a locking screw is arranged in the threaded hole, and a sealing ring is sleeved on the locking nut. The locking sealing structure in the scheme ensures that the bearing is stressed uniformly, and is convenient to install and detach and free from damage. And the sealing structure is increased, and the sealing effect is improved. The lock nut is arranged at the outermost side of the rotating shaft, so that the axial space for assembling the bearing is saved, and the bearing is convenient to install.

Description

Locking sealing structure for motor bearing

Technical Field

The utility model relates to the technical field of motors, in particular to a locking and sealing structure for a motor bearing.

Background

The bearing locking structure commonly used at present is locked by the elastic retainer ring for the shaft or the locking nut and the locking gasket in a matched manner. The elastic retainer ring for the shaft defines the shaft diameter range, has certain limitation and cannot play a role in sealing; the locking structure through lock nut and locking gasket leads to the poor contact between locking gasket and the bearing easily, causes the bearing atress uneven, and to the longer motor of shaft body length, the assembly is comparatively difficult, need beat locking gasket when assembly or dismantlement simultaneously, both damage the bearing easily also increased the inside degree of difficulty of changing the bearing of motor.

For example, chinese patent publication No. CN115955042a, publication No. 2023, month 04, 11, entitled "a motor bearing locking device and motor thereof", comprising motor end cap, bearing, wave spring, bearing chamber inner ring, bearing chamber outer ring, and locking bolt; the motor end cover is internally provided with a bearing chamber, the bearing chamber inner ring and the bearing chamber outer ring are sequentially arranged in the bearing chamber from inside to outside, the wave spring is arranged between the bearing and the motor end cover, and the bearing chamber outer ring is fixedly connected with the motor end cover through the locking bolt.

The existing patents have the following defects: the existing bearing locking structure adopts elastic check ring locking or locking nut and locking gasket to lock in a matched manner, and the elastic check ring for the shaft defines the shaft diameter range and cannot play a role in sealing; the locking gasket is difficult to assemble and disassemble, and the bearing is easy to damage when the locking gasket is disassembled, so that the difficulty of replacing the bearing is increased.

Disclosure of Invention

The utility model aims to solve the problems that the existing bearing locking structure adopts the elastic retainer ring to lock or the locking nut and the locking gasket to lock in a matched manner, and the elastic retainer ring for the shaft defines the shaft diameter range and cannot play a sealing role; the locking gasket loading and unloading difficulty, the easy damage bearing when dismantling the locking gasket increases the problem of the degree of difficulty of changing the bearing, provides a locking seal structure for motor bearing, increases seal structure, easy to assemble and dismantles, does not cause the harm to the bearing.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a locking seal structure for motor bearing, is in including pivot and cover the epaxial bearing of pivot, the cover is equipped with lock nut in the pivot, lock nut is located the outer end of bearing, be equipped with the ring channel on lock nut's the lateral wall, be equipped with the screw hole on lock nut's the outer terminal surface, the screw hole passes the ring channel, threaded hole is equipped with locking screw, the cover is equipped with the sealing washer on the lock nut. According to the locking sealing structure for the motor bearing, the locking nut and the inner ring of the bearing are matched to achieve the positioning and locking functions. The locking screw is screwed down, so that the annular groove is compressed, the outer end of the locking nut is compressed towards the direction of the bearing, and the locking nut is locked on the rotating shaft, so that the positioning and locking functions of the bearing are realized. When the locking screw is detached, the locking nut is detached from the rotating shaft after the locking screw is unscrewed. The inner end of the lock nut is matched with the outer end of the inner ring of the bearing, so that the bearing is stressed uniformly, and the bearing is convenient to install and detach and is not damaged. The sealing ring plays a sealing role, and improves the sealing effect of the outer end of the bearing. The lock nut is arranged at the outermost side of the rotating shaft, so that the axial space for assembling the bearing is saved, and the bearing is convenient to install.

Preferably, the annular grooves are distributed along the circumferential direction of the lock nut. The annular groove is close to the outer end of the lock nut, so that influence of the lock nut on bearing force when the lock nut is locked is reduced.

Preferably, the locking threaded holes are axially distributed along the central axis of the locking nut.

Preferably, the sealing ring is a lip-shaped sealing ring, and a lip of the lip-shaped sealing ring is matched with the outer side wall of the locking nut. The lip seal ring has a sealing effect.

Preferably, a plurality of nut rotating holes which are uniformly distributed in the axial direction are formed in the outer end face of the locking nut. The locking nut is convenient to install, and the installation efficiency of the locking nut is improved.

Preferably, the inner end surface of the lip seal ring and the inner end surface of the lock nut are in the same plane.

Preferably, the motor further comprises a motor shell and a bearing outer cover connected with the motor shell, wherein the bearing outer cover is sleeved on the lock nut, and the bearing outer cover limits the sealing ring on the lock nut. During installation, the bearing outer cover is fixed on the motor shell through bolts.

Preferably, the bearing outer cover is located at the outer end of the bearing, a mounting groove is formed in the inner end face of the bearing outer cover, and the sealing ring is limited in the mounting groove. The bearing outer cover limits the sealing ring on the lock nut, and plays a role in limiting and sealing.

Preferably, the annular groove penetrates through the outer side wall and the inner side wall of the lock nut. The processing is convenient, and ring channel deformation locks the pivot when tightening lock nut, improves locking effect, prevents that lock nut from becoming flexible.

Preferably, the number of the annular grooves is two, and the locking screw penetrates through the two annular grooves and abuts against the inner side wall of the annular groove close to the bearing. When the locking bolt is screwed down, the annular groove close to the outer end of the locking nut compresses tightly the deformation, plays a locking role, and the annular groove close to the inner end of the locking nut is spread, so that the end face of the locking nut on the inner ring of the bearing is uniformly stressed, and the damage to the bearing is reduced.

Therefore, the utility model has the following beneficial effects: the locking sealing structure in the scheme ensures that the bearing is stressed uniformly, and is convenient to install and detach and free from damage. And the sealing structure is increased, and the sealing effect is improved. The lock nut is arranged at the outermost side of the rotating shaft, so that the axial space for assembling the bearing is saved, and the bearing is convenient to install.

Drawings

Fig. 1 is a schematic view of a structure of the present utility model.

Fig. 2 is a cross-sectional view of the present utility model.

Fig. 3 is a partial enlarged view at a in fig. 2.

Fig. 4 is a schematic structural view of a lock nut according to a first embodiment of the present utility model.

Fig. 5 is a cross-section of a lock nut in accordance with a first embodiment of the present utility model.

Fig. 6 is a cross-section of a lock nut in accordance with a second embodiment of the present utility model.

The following figures are shown:

the device comprises a rotating shaft 1, a bearing 2, a locking nut 3, an annular groove 4, a threaded hole 5, a locking screw 6, a sealing ring 7, a nut rotating hole 8, a motor shell 9 and a bearing outer cover 10.

Detailed Description

In order to make the purposes, technical solutions and advantages of the technical solution embodiments of the present utility model more clear, the present utility model is further described below with reference to the accompanying drawings and the detailed description.

In a first embodiment, as shown in fig. 1, 2, 3, 4 and 5, a locking sealing structure for a motor bearing comprises a rotating shaft 1 and a bearing 2 sleeved on the rotating shaft 1, wherein a locking nut 3 is sleeved on the rotating shaft 1, the locking nut 3 is positioned at the outer end of the bearing 2, an annular groove 4 is arranged on the side wall of the locking nut 3, a threaded hole 5 is arranged on the outer end face of the locking nut 3, the threaded hole 5 penetrates through the annular groove 4, a locking screw 6 is arranged in the threaded hole 5, and a sealing ring 7 is sleeved on the locking nut 3.

In the locking sealing structure for the motor bearing in the embodiment, the locking nut 3 is matched with the inner ring of the bearing 2 to play a role in positioning and locking. The locking screw 6 is screwed down, so that the annular groove 4 is compressed, the outer end of the locking nut 3 is compressed towards the direction of the bearing 2, and the locking nut 3 is locked on the rotating shaft 1, so that the positioning and locking functions of the bearing 2 are realized. When the locking screw is detached, the locking nut 3 is detached from the rotating shaft 1 after the locking screw 6 is unscrewed. The inner end of the lock nut 3 is matched with the outer end of the inner ring of the bearing 2, so that the bearing 2 is stressed uniformly, and the bearing 2 is convenient to install and detach and is not damaged. The sealing ring 7 plays a sealing role and improves the sealing effect of the outer end of the bearing 2. The lock nut 3 is arranged at the outermost side of the rotating shaft 1, so that the axial space for assembling the bearing 2 is saved, and the bearing 2 is convenient to install. The problem that the existing bearing 2 locking structure adopts the elastic retainer ring to lock or the locking nut 3 is matched with the locking gasket to lock is solved, the elastic retainer ring for the shaft prescribes the shaft diameter range, and the sealing effect cannot be achieved; the locking gasket is difficult to assemble and disassemble, the bearing 2 is easy to damage when the locking gasket is disassembled, and the difficulty of replacing the bearing 2 is increased.

As shown in fig. 2 and 4, the annular grooves 4 are distributed along the circumferential direction of the lock nut 3. The annular groove 4 is close to the outer end of the lock nut 3, so that the influence of the lock nut 3 on the bearing 2 in locking the lock nut 3 is reduced. The locking threaded holes 5 are axially distributed along the central axis of the locking nut 3.

As shown in fig. 2 and 3, the seal ring 7 is a lip seal ring 7, and the lip of the lip seal ring 7 is matched with the outer side wall of the lock nut 3. The lip seal 7 has a sealing effect.

As shown in fig. 4, a plurality of nut rotating holes 8 which are uniformly distributed in the axial direction are arranged on the outer end surface of the locking nut 3. The installation of the lock nut 3 is convenient, and the installation efficiency of the lock nut 3 is improved.

Further, as shown in fig. 2, the inner end surface of the lip seal ring 7 is in the same plane as the inner end surface of the lock nut 3. The motor further comprises a motor shell 9 and a bearing 2 outer cover 10 connected with the motor shell 9, the bearing 2 outer cover 10 is sleeved on the lock nut 3, and the bearing 2 outer cover 10 limits the sealing ring 7 on the lock nut 3. In the mounting, the outer cover 10 of the bearing 2 is fixed to the motor housing 9 by bolts. The outer cover 10 of the bearing 2 is positioned at the outer end of the bearing 2, the inner end surface of the outer cover 10 of the bearing 2 is provided with a mounting groove, and the sealing ring 7 is limited in the mounting groove. The outer cover 10 of the bearing 2 limits the sealing ring 7 on the lock nut 3, thereby playing the roles of limiting and sealing.

Further, as shown in fig. 4 and 5, the annular groove 4 penetrates the outer side wall and the inner side wall of the lock nut 3. The processing is convenient, and annular groove 4 deformation locking pivot 1 when tightening lock nut 3 improves the locking effect, prevents that lock nut 3 from becoming flexible.

In the second embodiment, the rest of the structure of the present embodiment refers to the first embodiment, which is different in that, as shown in fig. 6, the number of annular grooves 4 is two, and the locking screw 6 passes through the two annular grooves 4 and abuts against the inner side wall of the annular groove 4 near the bearing 2. When the locking bolt is screwed down, the annular groove 4 close to the outer end of the locking nut 3 compresses tightly and deforms, so that the locking effect is achieved, the annular groove 4 close to the inner end of the locking nut 3 is spread, the end face of the locking nut 3, which is applied to the inner ring of the bearing 2, is uniformly stressed, and damage to the bearing 2 is reduced.

The utility model has the following beneficial effects: the locking seal structure in this scheme for bearing 2 atress is even, and installation and dismantlement are convenient and do not harm bearing 2. And the sealing structure is increased, and the sealing effect is improved. The lock nut 3 is arranged at the outermost side of the rotating shaft 1, so that the axial space for assembling the bearing 2 is saved, and the bearing 2 is convenient to install.

The above embodiments are merely preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model. All equivalent changes in shape and structure according to the present utility model are intended to be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a locking seal structure for motor bearing, is in including pivot (1) and cover pivot epaxial bearing (2), its characterized in that, the cover is equipped with lock nut (3) in the pivot, lock nut is located the outer end of bearing, be equipped with ring channel (4) on lock nut's the lateral wall, be equipped with screw hole (5) on lock nut's the outer terminal surface, the screw hole passes the ring channel, screw hole is equipped with locking screw (6), the cover is equipped with sealing washer (7) on the lock nut.

2. A locking seal arrangement for a motor bearing as recited in claim 1, wherein said annular grooves are circumferentially distributed about said lock nut.

3. A locking seal arrangement for a motor bearing as claimed in claim 2 wherein said locking threaded bores are axially distributed along the central axis of the locking nut.

4. A locking seal arrangement for a motor bearing according to claim 1, 2 or 3, wherein the seal ring is a lip seal, the lip of which cooperates with the outer side wall of the lock nut.

5. A locking seal structure for a motor bearing according to claim 1, 2 or 3, characterized in that a plurality of axially uniformly distributed nut rotating holes (8) are formed in the outer end face of the locking nut.

6. The locking seal arrangement for a motor bearing of claim 4 wherein the inner end surface of the lip seal is in the same plane as the inner end surface of the lock nut.

7. A locking seal for a motor bearing according to claim 3, further comprising a motor housing (9) and a bearing outer cover (10) connected to the motor housing, the bearing outer cover being fitted over the lock nut, the bearing outer cover limiting the sealing ring to the lock nut.

8. The locking and sealing structure for a motor bearing according to claim 7, wherein the bearing outer cover is located at the outer end of the bearing, a mounting groove is formed in the inner end face of the bearing outer cover, and the sealing ring is limited in the mounting groove.

9. A locking seal arrangement for a motor bearing as claimed in claim 1 or 2 or 3 or 7 or 8 wherein said annular groove extends through the outer and inner side walls of said lock nut.

10. A locking seal arrangement for a motor bearing according to claim 1 or 2 or 3 or 7 or 8 wherein the number of annular grooves is two and the locking screw passes through both annular grooves and abuts against the inner side wall of the annular groove adjacent the bearing.