CN117375293A - Motor sealing structure and motor - Google Patents

Abstract

The invention provides a motor sealing structure and a motor, wherein the motor sealing structure comprises: the shell, be provided with first end cover on the shell, be provided with the through-hole on the first end cover, be provided with the pivot in the shell, the one end of pivot passes stretch out after the through-hole the shell is outside, be provided with the main part in the pivot, the main part is located the pivot stretches out in the part outside the shell, the main part with have the clearance between the first end cover. According to the invention, the defect that in the prior art, the motor is in a framework oil seal form, so that impurities such as dust, oil stains and the like are easy to permeate into the servo motor to cause motor faults can be overcome, and the performance of the motor is improved.

Description

Motor sealing structure and motor

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a motor sealing structure and a motor.

Background

The servo motor is more and more applied to the field of industrial production due to the convenience in control, reliable work and convenient use. The output end of the servo motor is in a shaft seal mode, the requirement on a framework oil seal is high, and good sealing conditions are kept under the condition that the motor rotates at a high speed. The framework oil seal belongs to vulnerable parts, and once the sealing effect is reduced, impurities such as dust, greasy dirt and the like can be directly led to permeate into the servo motor, so that motor faults are caused, and the safety and reliability of shaft end sealing are improved better.

Because the motor in the prior art adopts the form of a framework oil seal, the framework oil seal belongs to a vulnerable part, and impurities such as dust, oil stains and the like are easy to permeate into the servo motor to cause motor faults and other technical problems, the invention designs a motor sealing structure and a motor.

Disclosure of Invention

Therefore, the invention provides a motor sealing structure and a motor, which can solve the technical problem that in the prior art, the motor adopts a framework oil seal mode, so that impurities such as dust, oil stains and the like are easy to permeate into a servo motor, and the motor is caused to be failed.

In order to solve the above problems, the present invention provides a motor sealing structure, comprising: the shell, be provided with first end cover on the shell, be provided with the through-hole on the first end cover, be provided with the pivot in the shell, the one end of pivot passes stretch out after the through-hole the shell is outside, be provided with the main part in the pivot, the main part is located the pivot stretches out in the part outside the shell, the main part with have the clearance between the first end cover.

In some embodiments, the first end cover is provided with a convex ring, the through hole is located in the convex ring, one end of the rotating shaft passes through the through hole and then extends out of the convex ring, the gap is formed between the main body and the convex ring, and the gap comprises a first section and a second section, the first section is located between the end part of the convex ring and the main body, and the second section is located between the peripheral wall of the convex ring and the main body.

In some embodiments, a groove is provided on the outer peripheral wall of the convex ring, an opening of the groove is located between the main body and the convex ring, and the height of the convex ring is greater than the height of the main body along the axial direction of the rotating shaft.

In some embodiments, the number of grooves is at least two, at least two of the grooves are spaced apart along the axial direction of the collar, and/or the number of grooves is a plurality of the grooves (14) are spaced apart along the circumferential direction of the collar.

In some embodiments, the inner wall of the groove has an inclined surface, and the inclined surface is inclined along the first end cap toward the first section.

In some embodiments, the axial section of the rotating shaft is taken as a projection plane, and the projection of the groove is any one of right triangle, rectangle and trapezoid.

In some embodiments, a seal is provided between the main body and the rotating shaft, and the rotating shaft can drive the main body to rotate synchronously.

In some embodiments, the motor sealing structure further includes a fixing member connected with the first end cap after penetrating through the main body, and the fixing member has a plurality of fixing members along a circumferential direction of the rotating shaft.

In some embodiments, the motor sealing structure further comprises a second end cover, one end of the shell is provided with the first end cover, the other end of the shell is provided with the second end cover, and the first end cover, the shell and the second end cover enclose a cavity structure.

The invention also provides a motor, which comprises the motor sealing structure.

The motor sealing structure and the motor provided by the invention have the following beneficial effects:

the main body is arranged on the rotating shaft, the main body can synchronously rotate with the rotating shaft, a gap is formed between the main body and the first end cover, when the rotating shaft drives the main body to rotate, centrifugal force is generated in the gap, and pressure difference is formed between the inside and the outside of the gap due to the centrifugal force in the gap, so that the sealing effect of preventing external pollutants from invading the inside of the shell is realized, an oil seal structure in the prior art is eliminated, quenching heat treatment is not needed at the corresponding position of the rotating shaft, the processing requirement of the rotating shaft is reduced, meanwhile, an oil seal installation process and corresponding tool design are eliminated, and the assembly difficulty is reduced; furthermore, the gap is smaller, the protection of the whole machine is formed through the airtight seal of the small gap, the assembly is simple, and the reliability is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

FIG. 1 is an assembled block diagram of a motor seal structure of the present invention;

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

fig. 3 is a schematic illustration of radial and axial gap sizes between the various components of fig. 2.

The reference numerals are:

1. a rotating shaft; 2. a first end cap; 3. a stator; 4. a rotor; 5. a housing; 6. a second end cap; 7. an encoder cover; 8. an encoder receptacle; 9. an outlet box; 10. a bearing; 11. a main body; 12. a fixing member; 13. a seal; 14. a groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. It should be understood, however, that the construction, proportion, and size of the drawings, in which the present invention is practiced, are all intended to be illustrative only, and not to limit the scope of the present invention, which should be defined by the appended claims. Any structural modification, proportional change or size adjustment should still fall within the scope of the disclosure without affecting the efficacy and achievement of the present invention. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

Referring now to fig. 1-3 in combination, in accordance with an embodiment of the present invention, there is provided a motor sealing structure comprising: the casing 5, be provided with first end cover 2 on the casing 5, be provided with the through-hole on the first end cover 2, be provided with pivot 1 in the casing 5, the one end of pivot 1 passes stretch out after the through-hole outside the casing 5, be provided with main part 11 on the pivot 1, main part 11 is located pivot 1 stretches out on the part outside the casing 5, main part 11 with have the clearance between the first end cover 2. According to the technical scheme, the main body 11 is arranged on the rotating shaft 1, the main body 11 can rotate synchronously with the rotating shaft 1, a gap is formed between the main body 11 and the first end cover 2, when the rotating shaft 1 drives the main body 11 to rotate, centrifugal force is generated in the gap, and pressure difference is formed between the inside and the outside of the gap due to the centrifugal force in the gap, so that the sealing effect of preventing external pollutants from invading the inside of the shell 5 is achieved, an oil seal structure in the prior art is eliminated, quenching heat treatment is not needed at the corresponding position of the rotating shaft, the processing requirement of the rotating shaft is reduced, meanwhile, an oil seal installation process and corresponding tool design are eliminated, and the assembly difficulty is reduced; furthermore, the gap is smaller, the protection of the whole machine is formed through the airtight seal of the small gap, the assembly is simple, and the reliability is high.

In some embodiments, the first end cover 2 is provided with a convex ring, the through hole is located in the convex ring, one end of the rotating shaft 1 passes through the through hole and then extends out of the convex ring, the gap is formed between the main body 11 and the convex ring, and the gap includes a first section and a second section, the first section is located between the end of the convex ring and the main body 11, and the second section is located between the peripheral wall of the convex ring and the main body 11. According to the technical scheme, the rotating shaft 1 drives the main body 11 to rotate in a rotating state, centrifugal force in a radial gap acts on the inside and outside of the gap to form a pressure difference, the sealing effect of preventing external pollutants from invading is achieved, the radial gap is a first section, under the static state of the rotating shaft 1, the sealing effect is achieved through the edge loss of the two sections of gaps, when external air flow enters the shell 5, the external air flow firstly enters a second section, the edge loss is firstly carried out in the second section, the air flow pressure is reduced, when the air flow enters the first section from the second section, the air flow collides with the main body, the air flow pressure is further reduced, impurities in the air flow can be intercepted, and under the dual actions of self gravity and collision, the impurities which can be driven by the air flow are reduced, and the sealing effect is achieved. The first section is located between the end of the collar and the body 11, and the second section is located between the peripheral wall of the collar and the body 11. The axial section of the rotating shaft is taken as projection, and the projection of the gap is L-shaped. In the actual installation process, referring to fig. 3, it is preferable that the axial section of the rotating shaft 1 is taken as a projection plane, in the projection, the width of the first section of the gap is 0.2±0.05mm, the width of the second section of the gap is 0.3±0.05mm, the opening width of the groove 14 is 0.5±0.02mm, and the depth is 0.5±0.02mm. Thereby tightly controlling the structural dimensions of the first end cap 2 and the main body 11 to ensure that the small gap seal formed therebetween has a good sealing effect.

In some embodiments, a groove 14 is provided on the outer peripheral wall of the convex ring, the opening of the groove 14 is located between the main body 11 and the convex ring, and the height of the convex ring is greater than the height of the main body 11 along the axial direction of the rotating shaft 1. In this technical scheme, along the axial of pivot 1, the height of bulge loop is greater than the height of main part 11, has the second clearance between main part 11 and the first end cover 2, and when the air current flowed into the second section from the second clearance, utilized recess 14, made the second section form the maze section, and the air current part can flow into recess 14 to further reduce air current pressure, make the impurity that the air current can drive reduce, thereby play sealed effect.

In some embodiments, the number of grooves 14 is at least two, at least two of the grooves 14 are spaced apart along the axial direction of the collar, and/or the number of the grooves 14 is a plurality, and a plurality of the grooves 14 are spaced apart along the circumferential direction of the collar. Further, the inner wall of the groove 14 has an inclined surface, and the inclined surface is inclined toward the first segment along the first end cap 2. Taking the axial section of the rotating shaft 1 as a projection plane, the projection of the groove 14 is any one of right triangle, rectangle and trapezoid. In this technical scheme, the pollutant is carried along by the air current, after the air current flows into the second section, at first through the along-the-way loss of second section, secondly, partial air current can flow into recess 14, further reduced the pressure of air current, then in the air current collided with main part 11 gets into the first section, under the along-the-way loss of first section, its pressure greatly reduced for can't drive impurity entering casing 5, recess 14 utilizes the restriction of recess 14 and the kinetic energy dissipation of the turbulent vortex in the recess 14 to further strengthen sealed effect, the clearance seals along-the-way loss means that the more that the air pressure decays behind is crossed, take the impurity. When the air flows from one large groove 14 to the gap between one small main body 11 and the convex ring and then flows into the other large groove 14, the pressure is reduced once, and the speed of the flowing air passing through the gap is increased along with the increasing specific volume of the flowing air, therefore, the more the pressure is reduced along the axial direction of the rotating shaft 1 and the more the flowing air passes through the groove 14, the less the air flowing into the next groove 14 can be driven, so that the sealing effect is achieved, and when the air flows enter a sealing cavity formed by the groove 14, the fluid does irregular movement, so as to form turbulence, namely turbulence, turbulence or turbulence, the projection of the groove 14 takes any one of a right triangle, a rectangle and a trapezoid, and of course, the groove 14 can take other shapes as well, and has an inclined surface inclined towards the first section along the first end cover 2. Of course, the shape, number and axial distribution of the grooves 14 can be designed according to practical needs.

In some embodiments, a sealing element 13 is disposed between the main body 11 and the rotating shaft 1, and the rotating shaft 1 can drive the main body 11 to rotate synchronously. In this technical scheme, main part 11 orientation the tip of pivot 1 is provided with the seal groove, and the seal groove is cyclic annular, and sealing member 13 sets up in the seal groove, and main part 11, sealing member 13 rotate along with pivot 1 is synchronous, and the three is static relatively, through sealing member 13, prevents that impurity from flowing into casing 5 in the clearance between pivot 1 and the main part 11 to cause the damage to the motor.

In some embodiments, the motor sealing structure further includes a fixing member 12, the fixing member 12 is connected to the first end cap 2 after penetrating through the main body 11, and the fixing member 12 has a plurality of fixing members along the circumferential direction of the rotating shaft 1. In this technical scheme, the fixing piece 12 is preferably a screw, and referring to fig. 2, the fixing piece 12 is installed along the axial direction of the rotating shaft 1, and of course, the fixing piece 12 may also be installed along the radial direction of the rotating shaft 1, and the main body 11 is fixed on the rotating shaft 1 through the fixing piece 12, so as to ensure that the main body 11 and the rotating shaft 1 rotate synchronously, thereby generating centrifugal force in the gap, and generating pressure difference between the inside and outside of the gap.

In some embodiments, the motor sealing structure further comprises a second end cover 6, one end of the housing 5 is provided with the first end cover 2, the other end is provided with the second end cover 6, and the first end cover 2, the housing 5 and the second end cover 6 enclose a cavity structure.

The invention also provides a motor, which comprises the motor sealing structure. Referring to fig. 1, the motor rotor 1 is sleeved on a motor rotor 4 and a bearing 10 of the motor, the motor further comprises a main body 11, a shell 5, a motor stator 3 fixed on the shell, a front end cover 2 connected with the shell, a motor outlet box 9 and a rear end cover 6 fixed at the rear end of the shell; the encoder cover 7 is fixed at the tail end of the motor, and the encoder outgoing line passes through the encoder socket 8, and the structure is the same as that of a conventional motor.

Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims (10)

1. A motor seal structure, its characterized in that: comprising the following steps: the novel rotary type portable electronic device comprises a shell body (5), wherein a first end cover (2) is arranged on the shell body (5), a through hole is formed in the first end cover (2), a rotating shaft (1) is arranged in the shell body (5), one end of the rotating shaft (1) penetrates through the through hole and then stretches out of the shell body (5), a main body (11) is arranged on the rotating shaft (1), the main body (11) is located on the portion, out of the shell body (5), of the rotating shaft (1), and a gap is reserved between the main body (11) and the first end cover (2).

2. The motor sealing structure according to claim 1, characterized in that: be provided with the bulge loop on first end cap (2), the through-hole is located in the bulge loop, one end of pivot (1) passes after the through-hole stretches out outside the bulge loop, the clearance forms main part (11) with between the bulge loop, just, the clearance includes first section and second section, first section is located the tip of bulge loop with between main part (11), the second section is located the periphery wall of bulge loop with between main part (11).

3. The motor sealing structure according to claim 2, characterized in that: the outer peripheral wall of the convex ring is provided with a groove (14), an opening of the groove (14) is positioned between the main body (11) and the convex ring, and the height of the convex ring is larger than that of the main body (11) along the axial direction of the rotating shaft (1).

4. A motor seal arrangement as claimed in claim 3, wherein: at least two grooves (14) are arranged at intervals along the axial direction of the convex ring, and/or a plurality of grooves (14) are arranged at intervals along the circumferential direction of the convex ring.

5. A motor seal arrangement as claimed in claim 3, wherein: the inner wall of the recess (14) has an inclined face and the inclined face is inclined along the first end cap (2) towards the first section.

6. A motor seal arrangement as claimed in claim 3, wherein: the axial section of the rotating shaft (1) is taken as a projection surface, and the projection of the groove (14) is any one of right triangle, rectangle and trapezoid.

7. The motor sealing structure according to claim 1, characterized in that: a sealing piece (13) is arranged between the main body (11) and the rotating shaft (1), and the rotating shaft (1) can drive the main body (11) to synchronously rotate.

8. The motor sealing structure according to claim 1, characterized in that: the motor sealing structure further comprises fixing pieces (12), wherein the fixing pieces (12) penetrate through the main body (11) and then are connected with the first end cover (2), and the fixing pieces (12) are multiple along the circumferential direction of the rotating shaft (1).

9. The motor sealing structure according to claim 1, characterized in that: the motor sealing structure further comprises a second end cover (6), wherein one end of the shell (5) is provided with the first end cover (2), the other end of the shell is provided with the second end cover (6), and the first end cover (2), the shell (5) and the second end cover (6) enclose to form a cavity structure.

10. An electric motor, characterized in that: comprising the motor sealing structure of any one of claims 1-9.