TWI681609B - Shaft seat for a motor - Google Patents

Abstract

A shaft seat for a motor is disclosed is provided to solve the problem where the rotation of the conventional motor is not stable. The shaft seat for a motor includes a shaft tube and an inner assembly disposed in the shaft tube. The inner assembly includes a partitioning member located between first and second bearings. Two ends of the partitioning member are respectively connected to a first shrinking portion and a second shrinking portion. The first shrinking portion and an inner periphery of the shaft tube form a first compartment. The second shrinking portion and the inner periphery of the shaft tube form a second compartment.

Description

Motor shaft seat

The invention relates to a motor part, especially a motor shaft seat.

Please refer to FIG. 1, which is a conventional motor shaft base 9. The conventional motor shaft base 9 has a hollow shaft tube 91, a first bearing 92, a second bearing 93 and a spacer 94. The hollow shaft tube 91 has a first end 91a and a second end 91b; the first bearing 92 and the second bearing 93 are disposed in the hollow shaft tube 91; the spacer 94 is located between the first bearing 92 and the Between the second bearings 93, and the upper and lower surfaces of the spacer 94 abut the first bearing 92 and the second bearing 93, respectively. In this way, the spacer 94 can maintain a fixed distance between the first bearing 92 and the second bearing 93 to prevent displacement of the first bearing 92 and the second bearing 93. An embodiment of the motor shaft base 9 similar to this conventional one has been disclosed in the patent case of the Republic of China Announcement No. 348910 "Improvement of Motor Bearing Collar".

In the above-mentioned conventional motor shaft seat 9, the first bearing 92 is provided in the hollow shaft tube 91 from the first end 91a of the hollow shaft tube 91, and the second bearing 93 is formed from the first end of the hollow shaft tube 91. The second end 91b is provided in the hollow shaft tube 91. However, since the first bearing 92 and the second bearing 93 are tightly coupled or glued to the inner wall of the hollow shaft tube 91, during assembly, the first bearing 92 and the second bearing 93 is likely to produce chips due to friction and scratches on the inner wall of the hollow shaft tube 91, or residual glue due to overflowing; after the first bearing 92 and the second bearing 93 have been in operation for a period of time, the above-mentioned cutting Debris or residual glue can easily run into the first bearing 92 and the second bearing 93, causing the first bearing 92 and the second bearing 93 to run unevenly, resulting in abnormal sounds. The balls and the balls of the second bearing 93 are scratched, which further affects the performance and service life of the motor.

In view of this, the conventional motor shaft seat still needs to be improved.

In order to solve the above problems, the object of the present invention is to provide a motor shaft seat, which can accumulate shavings or residual glue between the spacer and the inner wall surface of the shaft tube to prevent the shavings or residual glue from running to the first bearing and the first bearing Two bearings.

The following directivity or similar terms of the invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer" , "Side", etc., mainly refer to the directions of the attached drawings, and each directivity or its approximate terms are only used to help explain and understand the embodiments of the present invention, not to limit the present invention.

The motor shaft seat of the present invention includes: a shaft tube; and a shaft tube internal component, the shaft tube internal component is disposed in the shaft tube, the shaft tube internal component has a spacer located on a first bearing and a first Between the two bearings, the two axial end surfaces of the spacer are respectively connected to a first recessed portion and a second recessed portion, and a first chamber is formed between the first recessed portion and the inner wall surface of the shaft tube, the first A second chamber is formed between the two depressions and an inner wall surface of the shaft tube.

According to this, the motor shaft seat of the present invention uses the first recessed portion of the spacer and the inner wall surface of the shaft tube to form the first chamber, and the second recessed portion of the spacer and the shaft tube The second chamber is formed between the walls; therefore, when the first bearing and the second bearing are installed, the first bearing, the second bearing, and the inner wall surface of the shaft tube are shaved due to friction and scratches , Or the residual glue generated due to the overflow of glue, will be stored in the first chamber and the second chamber with the installation path of the first bearing and the second bearing, respectively, to ensure the chipping or the residue The glue will not run into the first bearing and the second bearing, so as to prevent the first bearing and the second bearing from generating abnormal noise due to the irregular operation. In this way, when the motor shaft of the present invention is mounted on a motor rotor, a rotating shaft of the motor rotor can maintain a good smoothness of rotation, and has the effects of improving the operating efficiency of the motor and extending the service life.

Wherein, the spacer has an outer wall surface connected to the shaft tube abutting against the inner wall surface of the shaft tube, and the first concave portion and the second concave portion are respectively connected to the outer wall surface. In this way, it has the effect of ensuring that the shavings can be stored in the first chamber and the second chamber.

Wherein, the first concave portion and the second concave portion respectively form a slope. In this way, the structure is simple and easy to manufacture, and has the effect of reducing manufacturing costs.

Wherein, the first recessed portion and an outer wall surface of the spacer form a first included angle, and the first included angle is 2 to 45 degrees. In this way, it has the effect of ensuring that the spacer can abut the outer ring of the first bearing.

Wherein, the second recessed portion and an outer wall surface of the spacer form a second included angle, and the second included angle is 2 to 45 degrees. In this way, it has the effect of ensuring that the spacer can abut the outer ring of the second bearing.

Wherein, the first concave portion and the second concave portion respectively form an arc surface. In this way, the spacer has the effect of being easily assembled on the shaft tube.

Wherein, the spacer uses a difference in outer diameter to form a first shoulder portion and a second shoulder portion, the first shoulder portion forms the first recessed portion, and the second shoulder portion forms the second recessed portion. In this way, the spacer has the effect of being easily assembled on the shaft tube.

Wherein, the axial height of the first recessed portion and the axial height of the second recessed portion are both less than or equal to 1/5 of the height of the spacer. In this way, the outer wall surface of the spacer has a sufficient area to abut the inner wall surface of the shaft tube.

Wherein, the height of the spacer is less than or equal to 1/3 of the height of the shaft tube and greater than or equal to the height of the first bearing and the height of the second bearing. In this way, the spacer, the first bearing, and the second bearing have a better spatial configuration.

Wherein, the inner wall of the spacer is between the inner ring and the outer ring of the first bearing, and between the inner ring and the outer ring of the second bearing. In this way, it has the effect of preventing the spacer from contacting the inner ring of the first bearing and the inner ring of the second bearing.

The shaft tube is made of metal. In this way, it has the effect of enhancing the structural strength of the shaft tube.

Among them, another bottom plate is connected to the shaft tube. In this way, the bottom plate has the effect of stably fixing the shaft tube.

In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description of preferred embodiments of the present invention, in conjunction with the attached drawings, as follows:

Please refer to FIG. 2, which is the first embodiment of the motor shaft seat of the present invention, and includes a shaft tube 1 and a shaft tube internal assembly 2. The shaft tube internal assembly 2 is disposed in the shaft tube 1.

The shaft tube 1 is hollow. The shaft tube 1 may have a first open end 1a and a second open end 1b. The shaft tube 1 may be connected to a bottom plate B by the first open end 1a. The bottom plate B may be A shaft tube seat B1 is provided convexly, and the shaft tube 1 is coupled to the shaft tube seat B1 of the bottom plate B; wherein, the bottom plate B and the shaft tube 1 can be integrated by injection molding of plastic material; in this embodiment, The shaft tube 1 is made of metal, so that it can be combined with the bottom plate B in a detachable manner, and at the same time, the structural strength of the shaft tube 1 is improved. In addition, the shaft tube 1 has an inner wall surface 11.

Please refer to Figures 2 and 3, the shaft tube assembly 2 has a first bearing 21, a second bearing 22 and a spacer 23, the spacer 23 is located in the first bearing 21 and the second bearing Between 22. The first bearing 21 and the second bearing 22 are ball bearings; the first bearing 21 may have an inner ring 21a and an outer ring 21b, and the second bearing 22 may have an inner ring 22a and an outer ring 22b. The inner ring 21a of the first bearing 21 and the inner ring 22a of the second bearing 22 fit a rotating shaft C of a motor rotor, the outer ring 21b of the first bearing 21 and the outer ring 22b of the second bearing 22 are tight It is coupled to the inner wall surface 11 of the shaft tube 1.

As shown in FIGS. 3 and 4, the spacer 23 has two axial end surfaces 231 which face the first bearing 21 and the second bearing 22 respectively. The spacer 23 has a first recessed portion 232 and a second recessed portion 233, the first recessed portion 232 and the second recessed portion 233 are respectively connected to the two axial end surfaces 231; the first recessed portion 232 and the shaft A first chamber S1 is formed between the inner wall surface 11 of the tube 1, and a second chamber S2 is formed between the second recessed portion 233 and the inner wall surface 11 of the shaft tube 1.

In particular, the types of the first recessed portion 232 and the second recessed portion 233 are not limited by the present invention, so as to be able to form the first chamber S1 and the second with the inner wall surface 11 of the shaft tube 1 respectively The chamber S2 is a principle; in this embodiment, the first recessed portion 232 and the second recessed portion 233 respectively form an inclined surface 232a, 233a for description.

Please refer to FIG. 4. In detail, the spacer 23 may have an outer wall surface 234 connected to the shaft tube 1, the outer wall surface 234 abuts the inner wall surface 11 of the shaft tube 1, the first recessed portion 232 The second concave portion 233 is connected to the outer wall surface 234 respectively, so that the first concave portion 232 and the second concave portion 233 are connected between the two axial end surfaces 231 and the outer wall surface 234 respectively. The inclined surface 232a and the outer wall surface 234 form a first included angle θ1, the first included angle θ1 is preferably 2 to 45 degrees; and the inclined surface 233a and the outer wall surface 234 form a second included angle θ2, the second included angle θ2 is relatively The best is 2~45 degrees.

Please refer to FIG. 5, wherein the first recessed portion 232 may have an axial height h1, the second recessed portion 233 may have an axial height h2, and the axial height h1 of the first recessed portion 232 and The axial height h2 of the second concave portion 233 is preferably less than or equal to 1/5 of the height H of the spacer 23. In addition, the inner wall D of the spacer 23 is preferably between the inner ring 21a and the outer ring 21b of the first bearing 21 and between the inner ring 22a and the outer ring 22b of the second bearing 22. On the other hand, the height H of the spacer 23 is preferably less than or equal to 1/3 of the height L of the shaft tube 1 and greater than or equal to the height F1 of the first bearing 21 and the height F2 of the second bearing 22.

Referring to FIGS. 3 and 4, according to the foregoing structure, the shaft tube internal assembly 2 is provided in the shaft tube 1, and the spacer 23 of the shaft tube internal assembly 2 is located on the first bearing 21 and the first Between the two bearings 22; the first recessed portion 232 of the spacer 23 and the inner wall surface 11 of the shaft tube 1 form the first chamber S1, the second recessed portion 233 of the spacer 23 and the shaft tube 1 The second chamber S2 is formed between the inner wall surfaces 11 of. According to this, when installing the shaft tube internal assembly 2, the spacer 23 is first installed in the shaft tube 1 from the first open end 1a or the second open end 1b of the shaft tube 1, so that the spacer The outer wall surface 234 of 23 abuts on the inner wall surface 11 of the shaft tube 1.

Next, the first bearing 21 is inserted into the first open end 1 a of the shaft tube 1, and the second bearing 22 is inserted through the second open end 1 b of the shaft tube 1. During the installation of the first bearing 21 and the second bearing 22, since the first bearing 21 and the second bearing 22 are tightly coupled or glued to the inner wall surface 11 of the shaft tube 1, the first A bearing 21 and the second bearing 22 are likely to cause shavings due to friction and scratches on the inner wall surface 11 of the shaft tube 1 or residual glue due to overflow of glue. At this time, the chips or residues generated by the first bearing 21 will be stored in the first chamber S1 along with the installation path of the first bearing 21, and the chips or residues generated by the second bearing 22 The glue will be stored in the second chamber S2 along with the installation path of the second bearing 22. In this way, it is ensured that the shavings or the residual glue does not run into the first bearing 21 and the second bearing 22, so as to raise the inner ring 21a of the first bearing 21, the inner ring 22a of the second bearing 22 and the The rotation stability of the rotating shaft C prevents the first bearing 21 and the second bearing 22 from generating abnormal noise due to irregular operation.

Please refer to FIG. 5, wherein, since the axial height h1 of the first recessed portion 232 and the axial height h2 of the second recessed portion 233 are both less than or equal to 1/5 of the height H of the spacer 23; Ensure that the outer wall surface 234 of the spacer 23 has sufficient area to abut the inner wall surface 11 of the shaft tube 1, so that the spacer 23 and the shaft tube 1 can be firmly combined, and the spacer 23 and the shaft are lifted Tube 1 combines the efficacy of stability.

In addition, since the inner wall D of the spacer 23 is preferably between the inner ring 21a and the outer ring 21b of the first bearing 21, and between the inner ring 22a and the outer ring 22b of the second bearing 22; The spacer 23 will not abut the inner ring 21a of the first bearing 21 and the inner ring 22a of the second bearing 22, to avoid making the inner ring 21a of the first bearing 21, the inner ring 22a of the second bearing 22 and the The shaft C cannot rotate smoothly. On the other hand, since the height H of the spacer 23 is less than or equal to 1/3 of the height L of the shaft tube 1, and is greater than or equal to the height F2 of the first bearing 21 and the height F2 of the second bearing 22; The part 23, the first bearing 21 and the second bearing system 22 can have a better space configuration.

Please refer to FIG. 6, which is the second embodiment of the motor shaft seat of the present invention. The first recessed portion 232 and the second recessed portion 233 form an arc surface 232b, 233b respectively, so that the first A compartment S1 and the second compartment S2 are formed in different shapes; thereby, the first recessed portion 232 and the second recessed portion 233 can provide another embodiment, and at the same time, the spacer 23 has an easy assembly in The efficacy of the shaft tube 1.

Please refer to FIG. 7, which is the third embodiment of the motor shaft seat of the present invention. The spacer 23 uses a difference in outer diameter to form a first shoulder 232c and a second shoulder 233c. The first shoulder 232c Then the first recessed portion 232 is formed, and the second shoulder portion 233c forms the second recessed portion 233; thereby, the first recessed portion 232 and the second recessed portion 233 can provide another implementation aspect, and at the same time, The spacer 23 has the effect of being easily assembled on the shaft tube 1.

In summary, in the motor shaft seat of the present invention, the first cavity is formed between the first recessed portion of the spacer and the inner wall surface of the shaft tube, and the second recessed portion of the spacer and the shaft tube The second chamber is formed between the inner wall surfaces of the; therefore, when the first bearing and the second bearing are installed, the friction between the first bearing, the second bearing, and the inner wall surface of the shaft tube is caused by friction and scratches Shavings, or residual glue generated due to overflowing glue, will be stored in the first chamber and the second chamber, respectively, along with the installation paths of the first bearing and the second bearing, to ensure that the shavings or The residual glue will not run into the first bearing and the second bearing, so as to prevent the first bearing and the second bearing from generating abnormal sound due to the irregular operation. Thereby, when the motor shaft of the present invention is seated on the motor rotor, the rotating shaft of the motor rotor can maintain a good smoothness of rotation, and has the effects of improving the running performance of the motor and extending the service life.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art without departing from the spirit and scope of the present invention still makes various changes and modifications to the above-mentioned embodiments. The technical scope of the invention is protected, so the scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

﹝this invention﹞ 1‧‧‧Shaft tube 1a‧‧‧First open end 1b‧‧‧Second open end 11‧‧‧Inner wall 2‧‧‧Shaft tube internal assembly 21‧‧‧First bearing 21a‧‧‧Inner Ring 21b‧‧‧Outer ring 22‧‧‧Second bearing 22a‧‧‧Inner Ring 22b‧‧‧Outer ring 23‧‧‧ spacer 231‧‧‧axial end face 232‧‧‧The first depression 232a‧‧‧Bevel 232b‧‧‧Curved 232c‧‧‧First shoulder 233‧‧‧Second depression 233a‧‧‧Bevel 233b‧‧‧Curved 233c‧‧‧Second shoulder 234‧‧‧Outer wall B‧‧‧Bottom plate B1‧‧‧Shaft tube seat C‧‧‧spindle D‧‧‧Inner wall of spacer H‧‧‧ Height of spacer L‧‧‧Height of shaft tube F1‧‧‧The height of the first bearing F2‧‧‧The height of the second bearing S1‧‧‧ First room S2‧‧‧Second compartment h1‧‧‧Axial height of the first depression h2‧‧‧Axial height of the second depression θ1‧‧‧The first angle θ2‧‧‧Second included angle ﹝Practice﹞ 9‧‧‧Motor shaft seat 91‧‧‧Hollow shaft tube 91a‧‧‧The first end 91b‧‧‧second end 92‧‧‧First bearing 93‧‧‧Second bearing 94‧‧‧ spacer

[Figure 1] A combined sectional view of a conventional motor shaft seat. [Figure 2] An exploded perspective view of a first embodiment of the present invention incorporating a base plate. [Figure 3] The first embodiment of the present invention combines a combined sectional view of a stator and a rotor. [Figure 4] A partially enlarged cross-sectional view along Figure A. [Figure 5] A partially enlarged cross-sectional view along Figure 3. [Figure 6] A partially enlarged cross-sectional view of a second embodiment of the present invention. [Figure 7] A partially enlarged cross-sectional view of a third embodiment of the present invention.

1‧‧‧Shaft tube

1a‧‧‧First open end

1b‧‧‧Second open end

11‧‧‧Inner wall

2‧‧‧Shaft tube internal assembly

21‧‧‧First bearing

21a‧‧‧Inner Ring

21b‧‧‧Outer ring

22‧‧‧Second bearing

22a‧‧‧Inner Ring

22b‧‧‧Outer ring

23‧‧‧ spacer

231‧‧‧axial end face

232‧‧‧The first depression

233‧‧‧Second depression

234‧‧‧Outer wall

B‧‧‧Bottom plate

B1‧‧‧Shaft tube seat

D‧‧‧Inner wall of spacer

Claims (14)

A motor shaft seat includes: a shaft tube; and a shaft tube internal assembly, the shaft tube internal assembly is disposed in the shaft tube, the shaft tube internal assembly has a spacer located in a first bearing and a second bearing The two axial end surfaces of the spacer are respectively connected to a first recessed portion and a second recessed portion, a first chamber is formed between the first recessed portion and the inner wall surface of the shaft tube, and the second recessed portion A second chamber is formed between the part and an inner wall surface of the shaft tube. The motor shaft seat as described in item 1 of the patent application range, wherein the spacer has an outer wall surface connecting the shaft tube abutting the inner wall surface of the shaft tube, and the first recessed portion and the second recessed portion are respectively connected The outer wall surface. The motor shaft seat as described in item 1 of the patent application scope, wherein the first recessed portion and the second recessed portion respectively form a slope. The motor shaft seat as described in item 3 of the patent application range, wherein the first recessed portion and an outer wall surface of the spacer form a first included angle, and the first included angle is 2 to 45 degrees. The motor shaft seat as described in item 3 of the patent application range, wherein the second recessed portion forms an angle with the outer wall surface of the spacer, and the second angle is 2 to 45 degrees. The motor shaft seat as described in item 1 of the patent application scope, wherein the first recessed portion and the second recessed portion respectively form an arc surface. The motor shaft seat as described in Item 6 of the patent application range, wherein the first recessed portion and an outer wall surface of the spacer form a first included angle, and the first included angle is 2 to 45 degrees. The motor shaft seat as described in item 6 of the patent application range, wherein the second recessed portion forms an angle with the outer wall surface of the spacer, and the second angle is 2 to 45 degrees. The motor shaft seat as described in item 1 of the patent application, wherein the spacer uses a difference in outer diameter to form a first shoulder portion and a second shoulder portion, the first shoulder portion forms the first recessed portion, the The second shoulder forms the second recess. The motor shaft seat as described in item 1 of the patent application range, wherein the axial height of the first recessed portion and the axial height of the second recessed portion are both less than or equal to 1/5 of the height of the spacer. The motor shaft seat according to item 1 of the patent application scope, wherein the height of the spacer is less than or equal to 1/3 of the height of the shaft tube and greater than or equal to the height of the first bearing and the height of the second bearing. The motor shaft seat as described in item 1 of the patent application range, wherein the inner wall of the spacer is between the inner ring and the outer ring of the first bearing, and between the inner ring and the outer ring of the second bearing. The motor shaft seat according to any one of claims 1 to 12, wherein the shaft tube is made of metal. The motor shaft seat as described in any one of the items 1 to 12 of the patent application scope further includes a bottom plate connected to the shaft tube.

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