JPH072632U - Thrust bearing device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a thrust bearing device which simplifies the assembling work and allows the assembling flexibility. [Structure] A thrust bearing member 1 having a flat plate-shaped thrust receiving portion 2 and four projecting portions 3A to 3D provided around the thrust receiving portion 2, and four projecting portions 3A around the thrust receiving portion 2. To 4D to receive 3D to 6D
A thrust bearing is obtained by using the bearing holding member (sleeve 5) provided with a locking portion 7 that locks the projections 3A to 3D, and locking the projections 3A to 3D in the recesses 6A to 6D. The member 1 is attached to the bearing holding member (sleeve 5).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thrust bearing device which is applied to a rotary electric motor such as a motor and which receives a thrust of a rotary shaft by a thrust bearing member attached to a bearing holding member.

[0002]

[Prior art]

 As a conventional example of a thrust bearing device applied to a motor or the like, a structure as shown in FIG. 4 is known. A sleeve 25 is provided at a substantially central position of the frame 24, and both of them constitute a bearing holding member, and a flat thrust bearing member 21 is attached to the bottom surface of the sleeve 25 with a screw 35. On the other hand, a rotary shaft 28 around which a hub 29 is fixed is inserted into a sleeve 25 of a bearing holding member, abuts against the thrust bearing member 21, is thrust-received, and is rotatably supported. Reference numeral 30 is a rotor magnet fixed to the hub 29 via a holding member 31, 32 is a stator coil fixed to the frame 24 via a support plate 33 so as to face the rotor magnet 30, and 34 is inside the sleeve 25. Filled lubricant. Reference numeral 35 denotes a ventilation hole for discharging the air in the sleeve 25, and F1 denotes a biasing force (suction force) received when the rotating shaft 28 rotates in the direction of the arrow.

FIG. 5 shows another conventional example, in which the same or corresponding parts as in FIG. 4 are designated by the same reference numerals. In this structure, the sleeve 32 is formed separately from the frame 24 and is fixed to the frame 24 by screws 36, and the thrust bearing member 21 is supported by a separate support plate 37, and the support plate 37 is screwed by screws 38. It is fixed to the sleeve 32 by.

[0004]

[Problems to be solved by the device]

 In any of the conventional thrust bearing devices as described above, since the thrust bearing member is fixed to the frame or the sleeve by screwing in any structure, the assembly work becomes complicated, and the degree of freedom in assembly cannot be obtained. There's a problem.

The present invention has been made in consideration of the above problems, and an object thereof is to provide a thrust bearing device which simplifies the assembling work and allows a greater degree of freedom in assembling.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a thrust bearing device in which a thrust bearing member mounted on a bearing holding member receives a thrust of a rotary shaft.The thrust bearing member includes a flat thrust receiving portion and the thrust receiving member. A plurality of protrusions are provided around the portion, and the bearing holding member has a plurality of recesses for receiving the plurality of protrusions around the thrust receiving portion of the thrust bearing member and a member for locking the received protrusions. A stopper is provided, and the thrust bearing member is pressed and held by the bearing holding member by locking the plurality of protrusions in the plurality of recesses.

In another aspect of the present invention, the rotary shaft is attached to a rotor of a motor, and the rotor of the motor is attracted to a stator by utilizing an axial urging force, so that the thrust bearing member is rotated by the rotary shaft. Is held against the holding member by pressing.

[0008]

[Action]

 According to the configuration of the present invention as set forth in claim 1, a thrust bearing member provided with a flat plate-shaped thrust receiving portion and a plurality of protrusions around the thrust receiving portion, and a plurality of thrust bearing members around the thrust receiving portion are provided. By using a bearing holding member provided with a plurality of recesses for receiving the projections and locking portions for locking the projections, the thrust bearing member is a bearing by locking the projections in the recesses. It is attached to the holding member. As a result, the thrust bearing member is pressed and held by the bearing holding member without using screws.

According to the configuration of the present invention as set forth in claim 2, the thrust bearing member is held by being pressed by the rotating shaft by utilizing the axial urging force received when the rotating shaft rotates. Attached to the member.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the thrust bearing device of the present invention, in which a thrust bearing member 1 is a flat plate-like thrust receiving portion 2 and a periphery of the thrust receiving portion 2 as shown in FIG. A plurality of protrusions, for example, four protrusions 3A, 3B, 3C, and 3D are provided, and have a disc-shaped appearance as a whole. Reference numeral 4 denotes a frame, and a sleeve 5 is provided at a substantially central position thereof, and both of them constitute a bearing holding member. As shown in FIG. 2, at the lower position of the sleeve 5 which constitutes the bearing holding member, four protrusions 3A to 3D around the thrust receiving portion 2 of the thrust bearing member 1 are received. The recesses 6A, 6B, 6C and 6D and the locking portion 7 that locks the received projections A to 3D are provided. Here, the inner shape d1 of each of the projections 3A to 3D is set to be slightly smaller than the inner shape d2 of each of the recesses 6A to 6D, whereby each of the projections 3A to 3D is formed in each of the recesses 6A to 6D. It is designed so that 3D can be smoothly received. The protrusions 3A to 3D and the recesses 6A to 6D are provided at equal intervals of 90 degrees along the circumferential direction. When the protrusions 3A to 3D and the recesses 6A to 6D are aligned in the circumferential direction, the protrusions 3A to 3D are received in the recesses 6A to 6D, and the thrust bearing member 1 is a bearing. It is attached to the lower position of the sleeve 5, which is a holding member. In addition, 5A shows the outer peripheral surface of the sleeve 5, and 5B shows the inner peripheral surface of the sleeve 5.

Reference numeral 8 denotes a rotary shaft around which a hub 9 is fixed, which is inserted into the sleeve 5 and has its tip end abutted against the thrust receiving portion 2 of the thrust bearing member 1 to be thrust-received so as to be rotatable. It is pivotally supported. Reference numeral 10 is a rotor magnet fixed to the hub 9 via a holding member 11, 12 is a stator coil fixed to the rotor magnet 10 on the frame 4 via a yoke plate 13, and 14 is inside the sleeve 5. The lubricant is filled in, 15 is a ventilation hole for discharging the air in the sleeve 5, and F1 is a biasing force received by the rotor shaft 10 and the coil 12 and the yoke plate 13 attracting the rotating shaft 8. is there.

In order to assemble the thrust bearing device of the present embodiment as described above, first, the protrusions 3A of the thrust bearing member 1 should be fitted to the recesses 6A to 6D of the sleeve 5 that constitutes the bearing holding member. Position and insert 3D to 3D. The solid lines in FIG. 3 indicate the positions of the protrusions 3A to 3D during this assembly. Next, after inserting the rotary shaft 8 into the sleeve 5 so that the tip end portion thereof contacts the thrust receiving portion 2 of the thrust bearing member 1, when the rotary shaft 8 is rotated, the rotary shaft 8 is attached in the axial direction. The thrust bearing member 1 also rotates in the circumferential direction by the force F1, but when the protrusions 3A to 3D match the positions of the recesses 6A to 6D by rotating about 45 degrees, the thrust force of the rotating shaft 8 becomes equal to the force F1. As a result of being pressed, the protrusions 3A to 3D are pushed into the recesses 6A to 6D and locked by the locking portion 7. As a result, the thrust bearing member 1 is mounted in the sleeve 5, that is, the bearing holding member. The broken lines in FIG. 3 indicate the positions of the protrusions 3A to 3D at the completion of such assembly.

According to the present embodiment as described above, the thrust bearing member 1 having the flat plate-shaped thrust receiving portion 2 and the four projections 3A to 3D provided around the thrust receiving portion 2 and the thrust bearing member 1 are provided. Bearing holding member (sleeve 5) provided with four recesses 6A to 6D for receiving the four projections 3A to 3D around the portion 2 and a locking portion 7 for locking the projections 3A to 3D Since the thrust bearing member 1 is attached to the bearing holding member (sleeve 5) by locking the projections 3A to 3D in the recesses 6A to 6D, the thrust is fixed by screwing as in the conventional case. Since the bearing member is not attached to the bearing holding member, the assembling work can be simplified and the assembly can be made more flexible. Further, according to the present embodiment, since screwing is not required, disassembly, reproduction and the like can be repeated, and further, loss of parts can be reduced. Furthermore, it is possible to reduce the load and damage on the rotor during assembly. The numbers of the protrusions and the recesses are merely examples, and can be set arbitrarily.

[0014]

[Effect of device]

 As described above, according to the present invention, a thrust bearing member provided with a flat plate-shaped thrust receiving portion and a plurality of protrusions around the thrust receiving portion, and a plurality of protrusions around the thrust receiving portion are received. Since a bearing holding member provided with a plurality of recesses and locking portions for locking the respective projections is used, the thrust bearing member is attached to the bearing holding member by locking the respective projections in the respective recesses. As a result, the assembly work can be simplified and the assembly can be made more flexible.

[Brief description of drawings]

1 is a sectional view showing an embodiment of a thrust bearing device of the present invention.

FIG. 2 is a plan view showing a configuration of a bearing holding member used in this embodiment.

FIG. 3 is a plan view showing the configuration of a thrust bearing member used in this embodiment.

FIG. 4 is a sectional view showing a thrust bearing device of a conventional example.

FIG. 5 is a cross-sectional view showing another conventional thrust bearing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thrust bearing member 2 Thrust receiving portion 3A to 3D Projection portion 5 Sleeve 6A to 6D Recess 7 Locking portion 8 Rotating shaft F1 Energizing force of rotating shaft 8

Claims (2)

[Scope of utility model registration request] 1. A thrust bearing device for receiving thrust of a rotary shaft by means of a thrust bearing member attached to a bearing holding member, wherein the thrust bearing member has a flat plate-shaped thrust receiving portion and a plurality of projections around the thrust receiving portion. And a plurality of recesses for receiving the plurality of projections around the thrust receiving portion of the thrust bearing member, and a locking portion for locking each of the received projections are provided on the bearing holding member. A thrust bearing device, wherein the thrust bearing member is pressed and held by the bearing holding member by locking the plurality of protrusions in the plurality of recesses. 2. The rotating shaft is attached to a rotor of a motor, and the thrust bearing member is pressed against the holding member by the rotating shaft by utilizing an axial biasing force of the rotor of the motor being attracted to a stator. The thrust bearing device according to claim 1, wherein the thrust bearing device is held by being held.