TWI479778B - Shaft buckle for motor - Google Patents

Description

Motor mandrel buckle

The present invention relates to a buckle for a motor spindle, particularly a mandrel that can be snapped onto a motor to limit the buckle that the motor rotor can only rotate relative to the stator without disengaging.

Referring to Figures 1 and 2, the conventional buckle 7 includes a ring body 71 and a plurality of limiting members 72. The ring body 71 is formed with an inner hole 711 in the center, and each of the limiting members 72 is connected to the ring member 711. The inner hole 711 has a wall extending toward the center, and each of the limiting members 72 is formed with a shaft hole 73.

Referring to FIGS. 1 and 3, when the conventional buckle 7 is applied to a motor 8, the motor 8 includes a base 81, a stator 82 and a rotor 83. The base 81 has a shaft tube 811. The buckle 7 is placed in the shaft tube 811. The shaft tube 811 is additionally provided with a bearing 812, and the stator 82 is fixed to the outer circumference of the shaft tube 811. A spindle 831 is disposed in the center of the rotor 83. The spindle 831 is connected to the rotor 83 at one end, and a buckle groove 832 is disposed on the periphery of the other end. The spindle 831 can pass through the bearing 812 and the buckle 7 The shaft hole 73 engages each of the limiting members 72 in the buckle groove 832 to restrict the spindle 831 from rotating only in the shaft tube 811 and cannot be disengaged.

Referring again to FIGS. 2 and 4, when the mandrel 831 passes through the shaft hole 73 of the buckle 7, since the hole diameter of the shaft hole 73 is smaller than the outer diameter of the mandrel 831, an external force must be applied to force the limit. The position member 72 is deformed, so that the shaft hole 73 is reamed to facilitate the passage of the end of the spindle 831, and then the limiting member 72 is inserted into the buckle groove 832.

However, it is known that each of the limiting members 72 is a sheet-like body having a uniform thickness. Therefore, when the end portion of the mandrel 831 presses each of the limiting members 72 to deform it, the amount of deformation is easily concentrated on a specific one. The position, and a large amount of deformation is concentrated on the portion where each of the limiting members 72 has a uniform thickness, so that the portion is prone to cracks or even breaks during the deformation process.

Referring to FIG. 5, there is another conventional buckle 9 structure. The buckle 9 also includes a ring body 91 and a plurality of limiting members 92. The ring body 91 has an inner hole 911 formed therein. The limiting member 92 is connected to the inner wall 911 of the ring body 91 obliquely downward, and each of the limiting members 92 is formed with a shaft hole 93. However, although the limit members 92 of the conventional buckle 9 are inclined, the amount of deformation of each of the limit members 92 can be reduced. However, the thickness of each of the limit members 92 is still uniform, so the deformation cannot be solved. The amount concentrates on the disadvantage that each of the limiting members 92 has a uniform thickness portion, so that cracks or even breaks are easily generated.

When the respective limiting members 72, 92 of the conventional buckles 7 and 9 are broken, the breaking limiting members 72, 92 fall inside the shaft tube 811, and follow the mandrel 831 continuously in the shaft tube 811. The internal twisting collision produces noise. Moreover, when a part of the limiting members 72, 92 are broken, the overall strength of the buckles 832 of the limiting members 72, 92 embedded in the mandrel 831 is also reduced, so when the motor 8 is subjected to an external force impact, It is easy to cause the rotor 83 to fall off.

The object of the present invention is to provide a buckle for a motor spindle, which is not susceptible to cracking or breaking during assembly, and has a long service life when applied to a motor.

Another object of the present invention is to provide a buckle for a motor spindle that, when applied to a motor, avoids noise and prevents the rotor from falling out.

A buckle for a motor spindle according to the present invention comprises: a ring body having an inner hole formed therein; and a plurality of limiting members each having a joint end and a latch end, wherein the joint ends of the limit members are Connecting the inner hole wall, the locking end of each of the limiting members extends from the inner hole wall toward the center and surrounds the shaft to form a shaft hole, and each of the limiting members has an upper surface and a lower surface; wherein each of the limiting positions The thickness of the piece is the axial distance between the upper surface and the lower surface, the thickness of the joint end is the largest, the thickness of the clip end is the smallest, and the thickness of each of the limit members is from the joint end toward the latch end. Gradually.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Referring to FIGS. 6 and 7, the buckle 1 of the first embodiment of the present invention includes a ring body 11 and a plurality of limiting members 12.

An inner hole 111 is formed in the center of the ring body 11 , and the inner hole 111 penetrates through a top surface 112 and a bottom surface 113 of the ring body 1 .

Each of the limiting members 12 has a connecting end 121 and a latching end 122. The connecting end 121 of each of the limiting members 12 is connected to the wall of the inner hole 111 of the ring body 11, and the card of each limiting member 12 The end 122 extends from the wall of the inner bore 111 toward the center and is formed with a shaft hole 13 therearound. Each of the limiting members 12 has an upper surface 123 facing the top surface 112 of the ring body 11 and a lower surface 124 facing the bottom surface 113 of the ring body 11.

The upper surface 123 and the lower surface 124 of each of the limiting members 12 may be a flat surface, a curved surface or a combination of a flat surface and a curved surface, and the axial distance between the upper surface 123 and the lower surface 124 of each of the limiting members 12 is The thickness of each of the limiting members 12 is tapered by the bonding end 121 toward the latching end 122. In this embodiment, the upper surface 123 and the lower surface 124 are all curved surfaces, and the upper surface 123 and the lower surface 124 are preferably symmetrical. The thickness (T1) of the bonding end 121 is the largest, and the latching end 122 is The thickness (T2) is minimized such that the thickness of each of the limiting members 12 is continuously tapered from the bonding end 121 toward the latching end 122.

Referring to Figures 6 and 8, when the buckle 1 of the first embodiment of the present invention is applied to a motor 2, the motor 2 includes a base 21, a stator 22 and a rotor 23, the base 21 having A shaft tube 211 is inserted into the shaft tube 211. The shaft tube 211 is further provided with a bearing 212, and the stator 22 is fixed to the outer circumference of the shaft tube 211. The rotor 23 has a hub 231 and a spindle 232. The spindle 232 is connected to the hub 231 at one end, and a buckle groove 232a is disposed adjacent to the other end of the spindle 232. The spindle 232 can pass through the bearing 212. And the shaft hole 13 of the buckle 1 is such that the limiting member 12 is embedded in the buckle groove 232a to restrict the spindle 232 from rotating only in the shaft tube 211 and cannot be disengaged.

Referring to FIGS. 7 and 9, when the mandrel 232 of the motor 2 passes through the shaft hole 13 of the buckle 1, the end of the mandrel 232 is pressed to force the stoppers 12 to be deformed. The shaft hole 13 is reamed to facilitate the passage of the end of the spindle 232, and the latching end 122 of each of the limiting members 12 is inserted into the buckle groove 232a. Moreover, since the thickness of each of the limiting members 12 is continuously tapered by the engaging end 121 toward the latching end 122, when each of the limiting members 12 is deformed by being pressed by the end of the spindle 232, It is possible to prevent the deformation amount of each of the stoppers 12 from being concentrated at a certain position, so that it is not easy to generate cracks or breaks during the deformation.

As shown in FIG. 10 , the buckle 3 of the second embodiment of the present invention also includes a ring body 31 , an inner hole 311 , a top surface 312 , a bottom surface 313 , a limiting member 32 , a coupling end 321 , and a latching end 322 . Structural features such as the upper surface 323, the lower surface 324, and the shaft hole 33. Compared with the foregoing first embodiment, the upper surface 323 and the lower surface 324 of the second embodiment are asymmetric, and the thickness of each of the limiting members 32 is also formed continuously by the bonding end 321 toward the latching end 322. Gradually. In addition, the upper surface 323 is formed by two curved surfaces of different curvatures, such that an arcuate portion 323a is formed adjacent to the upper surface 323 and the latch end 322. Therefore, in the second embodiment, in addition to the fact that each of the limiting members 32 is not easily cracked or broken during the deformation process, when the top end of the mandrel 232 passes through the shaft hole 33, the arc guiding portion 323a can also be used. It is easier to guide through the shaft hole 33.

As described above, the thickness of each of the limiting members of the present invention is continuously tapered from the engaging end toward the latching end, and can be avoided when each of the limiting members is deformed by being pressed by the end of the spindle. The deformation amount of each of the limiting members is concentrated at a specific position, so that it is not easy to generate cracks or breaks during the deformation process, and the service life is long.

Each of the limiting members of the present invention is not easy to generate cracks or breaks during the deformation process, so that when used in a motor, the smoothness of the rotation of the mandrel can be avoided and noise can be avoided, and each of the limiting members can also be stably Engraved in the buckle groove of the mandrel to prevent the rotor from falling off.

In addition, an arc guiding portion is formed at an adjoining surface of the upper surface of the present invention and the latching end. Therefore, when the top end of the mandrel passes through the shaft hole, the axis can be more easily passed through the guiding portion. hole.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

1. . . Buckle

11. . . Ring body

111. . . Bore

112. . . Top surface

113. . . Bottom

12. . . Limiter

121. . . Binding end

122. . . Card end

123. . . Upper surface

124. . . lower surface

13. . . Shaft hole

2. . . motor

twenty one. . . Pedestal

211. . . Shaft tube

212. . . Bearing

twenty two. . . stator

twenty three. . . Rotor

231. . . Wheel hub

232. . . Mandrel

232a. . . Buckle

3. . . Buckle

31. . . Ring body

311. . . Bore

312. . . Top surface

313. . . Bottom

32. . . Limiter

321. . . Binding end

322. . . Card end

323. . . Upper surface

323a. . . Arc guide

324. . . lower surface

33. . . Shaft hole

[知知]

7. . . Buckle

71. . . Ring body

711. . . Bore

72. . . Limiter

73. . . Shaft hole

8. . . motor

81. . . Pedestal

811. . . Shaft tube

812. . . Bearing

82. . . stator

83. . . Rotor

831. . . Mandrel

832. . . Buckle

9. . . Buckle

91. . . Ring body

911. . . Bore

92. . . Limiter

93. . . Shaft hole

Figure 1: The three-dimensional appearance and partial cross-sectional view of the first conventional structure.

Figure 2: A plan sectional view of the first conventional structure.

Figure 3: A plan view of the first conventional structure applied to a motor.

Figure 4: Implementation state diagram of the first conventional structure.

Figure 5: Implementation state diagram of the second conventional structure.

Figure 6 is a perspective view and a partial cross-sectional view of a first embodiment of the present invention.

Figure 7 is a plan sectional view showing a first embodiment of the present invention.

Figure 8 is a plan sectional view showing the first embodiment of the present invention applied to a motor.

Fig. 9 is a view showing an implementation state of the first embodiment of the present invention.

Fig. 10 is a view showing an implementation state of a second embodiment of the present invention.

1. . . Buckle

11. . . Ring body

111. . . Bore

112. . . Top surface

113. . . Bottom

12. . . Limiter

121. . . Binding end

122. . . Card end

123. . . Upper surface

124. . . lower surface

13. . . Shaft hole

Claims (5)

The buckle of the motor spindle comprises: a ring body, an inner hole is formed in the center; and a plurality of limiting members each have a joint end and a latch end, wherein the joint ends of the limit members are connected to the inner end a hole wall, the latching end of each of the limiting members extends from the inner hole wall toward the center and surrounds the shaft hole, and each of the limiting members has an upper surface and a lower surface; wherein the thickness of each of the limiting members The axial spacing between the upper surface and the lower surface is the largest, the thickness of the clamping end is the smallest, and the thickness of each of the limiting members is tapered from the bonding end toward the latch end; The thickness of each of the limiting members is continuously tapered from the bonding end toward the latch end. The buckle of the motor spindle according to claim 1, wherein the upper surface and the latch end are formed with an arc guiding portion. The buckle of the motor spindle according to claim 1, wherein the upper surface and the lower surface are flat or curved. The buckle of the motor spindle according to Item 3 of the patent application scope, wherein the upper surface and the lower surface have a symmetrical shape. The buckle of the motor spindle according to claim 3, wherein the upper surface and the lower surface are asymmetric.