High-precision brushless motor with bearing structure

Abstract

The utility model discloses a high-precision brushless motor with a bearing structure, and relates to the technical field of brushless motors. The device comprises a base and an installation plate, two ball bearings are installed on the outer side of a shaft body, a spring is arranged on the outer side of the shaft body in a sleeved mode, and a rotary disc is installed on the outer sides of the ball bearings. According to the utility model, the springs are added for prepressing, and the corresponding springs are selected according to the gap of the ball bearings and the designed prepressing force to eject and eliminate the gap between the inner ring and the outer ring of the ball bearings, so that the shaking during rotation is reduced, and the arrangement of the ball bearings is precisely designed to offset the shaking during rotation; after the design is improved, the shaking of the rotor when the brushless motor with the bearing structure works can be greatly reduced, so that the high precision of the oil-retaining bearing is achieved, but the processing and the assembly are relatively simpler, the two bearings are fixed on the same part, the shape, the angle and the like of the bearing fixing surface can be properly controlled during processing, and the reliability of the brushless motor is improved. A certain included angle is formed between the inner ring and the outer ring of the bearing, so that structural defects are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motors, in particular to a brushless motor with a high-precision bearing structure. Background Art

[0002] A brushless motor is an electric motor, also known as a DC brushless motor. It uses an electronic controller to achieve synchronous operation between the permanent magnet on the motor rotor and the electromagnetic coil on the stator, thereby realizing the operation of the motor. The brushless motor with a bearing structure is a design form of a brushless motor. It has some special structural designs in terms of motor bearings. The rotor is composed of an outer cylinder, a magnet, a turntable, an outer ring of a bearing, etc.; the stator is composed of a base, a winding coil, a spring, a shaft, an inner ring of a bearing, etc. Usually, the rotor and stator of a brushless motor are supported by bearings to keep the rotor rotating smoothly and reduce friction losses. In existing brushless motors, oil-containing bearings are usually used, and ball bearings are rarely used, because the large clearance of ball bearings causes poor motor accuracy and it is difficult to meet higher requirements; but the oil-containing bearing has a complex structure, and it is difficult to produce and assemble it, and the noise is slightly worse than that of a structure using a ball bearing. The clearance between the inner and outer rings of the bearing will shake, which is not stable enough. In addition, the existing brushless motor will vibrate during operation, and long-term vibration will affect the normal operation of the equipment. In view of the above problems, the inventor proposes a high-precision brushless motor with a bearing structure to solve the above problems. Utility Model Content

[0003] In order to solve the problem that the gap between the inner and outer rings of the bearing shakes and the entire device vibrates during operation; the purpose of the utility model is to provide a brushless motor with a high-precision bearing structure.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a high-precision brushless motor with a bearing structure, comprising a base and a mounting plate, the mounting plate being located below the base, a shaft body being fixedly provided on the top of the base, two ball bearings being installed on the outside of the shaft body, a spring being sleeved on the outside of the shaft body, a winding coil being installed on the outside of the base, a turntable being installed on the outside of the ball bearing, an outer cylinder being installed on the outside of the turntable, the outer cylinder being sleeved on the outside of the winding coil, a magnet being installed on the inner wall of the outer cylinder, the spring being located between the two ball bearings, an angle being formed between the two ball bearings, the outer ring of the ball bearing being fixedly connected to the turntable, and the inner ring of the ball bearing being fixedly connected to the shaft body.

[0005] Preferably, symmetrically distributed vibration dampers are installed on the top of the mounting plate, and the top of the vibration dampers is fixedly connected to the base. Auxiliary rods distributed in a circular array are fixedly provided at one end of the mounting plate close to the base, and fixed blocks distributed in a circular array are fixedly sleeved on the outer side of the base, and four auxiliary rods are movably inserted into the four fixed blocks.

[0006] Preferably, a control element is installed in the base, a reserved assembly hole is installed in the turntable, the magnet is connected to the outer cylinder by glue dispensing, and the turntable is connected to the outer cylinder by screw locking.

[0007] Preferably, symmetrically distributed square grooves are provided on both sides of the mounting plate, two bolts are movably inserted in the square grooves, the bottom ends of the two bolts on the same side are fixedly connected with foot blocks, hexagonal nuts are threadedly sleeved on the outer sides of the bolts, and fixing holes are provided in the foot blocks.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. In the utility model, the spring, shaft, ball bearing, turntable and winding coil are arranged to cooperate with each other to increase the spring preload. According to the bearing clearance and the designed preload, the corresponding spring is selected to eliminate the clearance between the inner and outer rings of the bearings, thereby reducing the shaking during rotation. The arrangement of the bearings is precisely designed to offset the shaking during rotation. After the improved design, the shaking of the rotor of the brushless motor with the bearing structure can be greatly reduced during operation, thereby achieving the high precision of the oil-containing bearing. However, the processing and assembly can be relatively simpler. The two bearings are fixed on the same component. During processing, the shape and angle of the bearing fixing surface can be properly controlled to make a certain angle between the inner and outer rings of the bearing, thereby eliminating the structural defects.

[0010] 2. In the utility model, by arranging the mounting plate, vibration damper, auxiliary rod and fixing block and other structures to cooperate with each other, the vibration generated by the equipment during operation can be reduced through the vibration damper and other structures, so as to avoid long-term vibration affecting the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0014] Figure 3 This is a front view schematic diagram of the base and its connection structure of the utility model;

[0015] Figure 4Schematic diagram for comparing the ball bearing of the utility model with the conventional design.

[0016] In the figure: 1. base; 11. shaft; 12. ball bearing; 13. spring; 14. winding coil; 15. control element; 2. outer cylinder; 21. magnet; 22. turntable; 23. reserved assembly hole; 3. mounting plate; 31. vibration damper; 32. auxiliary rod; 33. fixing block; 4. square groove; 41. bolt; 42. foot block; 43. hexagonal nut; 44. fixing hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-4 As shown, the utility model provides a high-precision brushless motor with a bearing structure, including a base 1 and a mounting plate 3, the mounting plate 3 is used for mounting and supporting, the mounting plate 3 is located below the base 1, a shaft 11 is fixedly provided on the top of the base 1, the shaft 11 is used to install a ball bearing 12, two ball bearings 12 are installed on the outside of the shaft 11, the ball bearings 12 are used to assist the rotation of the turntable 22, a spring 13 is sleeved on the outside of the shaft 11, by increasing the preload of the spring 13, according to the bearing clearance and the designed preload, a relatively The corresponding spring 13 eliminates the gap between the inner and outer rings of the bearings, thereby reducing the shaking during rotation. A winding coil 14 is installed on the outside of the base 1, a turntable 22 is installed on the outside of the ball bearing 12, an outer cylinder 2 is installed on the outside of the turntable 22, the outer cylinder 2 is sleeved on the outside of the winding coil 14, and a magnet 21 is installed on the inner wall of the outer cylinder 2. The spring 13 is located between the two ball bearings 12, and there is an angle between the two ball bearings 12. The outer ring of the ball bearing 12 is fixedly connected to the turntable 22, and the inner ring of the ball bearing 12 is fixedly connected to the shaft 11.

[0019] Symmetrically distributed vibration dampers 31 are installed on the top of the mounting plate 3, and the top of the vibration damper 31 is fixedly connected to the base 1. Auxiliary rods 32 distributed in a circular array are fixedly provided at one end of the mounting plate 3 close to the base 1. Fixed blocks 33 distributed in a circular array are fixedly sleeved on the outer side of the base 1. Four auxiliary rods 32 are movably inserted into the four fixed blocks 33.

[0020] By adopting the above technical solution, the vibration generated by the entire device during operation can be reduced, thereby preventing the parts of the equipment from loosening due to long-term vibration, which in turn affects the normal operation of the equipment.

[0021] A control element 15 is installed in the base 1 .

[0022] By adopting the above technical solution, the control element 15 can control the switch of the device.

[0023] A reserved assembly hole 23 is installed in the turntable 22 .

[0024] By adopting the above technical solution, the reserved assembly hole 23 facilitates the assembly of the device.

[0025] The magnet 21 is connected to the outer cylinder 2 by dispensing glue, and the turntable 22 is connected to the outer cylinder 2 by screw locking.

[0026] By adopting the above technical solution, the connection between the structures is made more stable.

[0027] Both sides of the mounting plate 3 are respectively provided with square grooves 4 which are symmetrically distributed.

[0028] By adopting the above technical solution, the square groove 4 can adjust the position of the foot block 42, and then the fixing point can be adjusted and installed.

[0029] Two bolts 41 are movably inserted in the square slot 4 , and foot blocks 42 are fixedly connected to the bottom ends of the two bolts 41 on the same side.

[0030] By adopting the above technical solution, the bolt 41 is moved in the square groove 4, so that the position of the foot block 42 can be adjusted, and the foot block 42 can connect and fix the entire device.

[0031] A hexagonal nut 43 is threadedly sleeved on the outer side of the bolt 41 , and a fixing hole 44 is opened in the foot block 42 .

[0032] By adopting the above technical solution, the hexagonal nut 43 can fix the bolt 41 in the square groove 4, so that the position of the foot block 42 can be adjusted, and the fixing hole 44 can be connected to the outside.

[0033] Working principle: First, the device is energized so that the magnet 21 and the coil 14 cause the turntable 22 to rotate, and then the turntable 22 can drive the external device to rotate. By redesigning the device structure, the spacing between the bearings is as large as possible, and the preload of the spring 13 is increased. According to the clearance of the ball bearing 12 and the designed preload, the corresponding spring 13 is selected to eliminate the clearance between the inner and outer rings of the bearings, thereby reducing the shaking during rotation. The arrangement of the ball bearing 12 is precisely designed to offset the shaking during rotation. The two ball bearings 12 are fixed on the same component. During processing, the shape and angle of the fixed surface of the ball bearing 12 can be properly controlled to make a certain angle between the inner and outer rings of the bearing, thereby eliminating structural defects. After improving the design, the shaking of the rotor of the brushless motor of the bearing structure can be greatly reduced when it is working, thereby achieving high precision of the oil-containing bearing, which can make processing and assembly relatively simpler. The vibration generated during the operation of the equipment can be damped by the vibration damper 31 to avoid the problem that long-term shaking during the overall operation of the equipment easily leads to loosening of the components in the equipment, thereby affecting the normal operation of the equipment.

[0034] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A brushless motor with a high-precision bearing structure, comprising a base (1) and a mounting plate (3), characterized in that: The mounting plate (3) is located below the base (1); a shaft (11) is fixedly provided at the top of the base (1); two ball bearings (12) are installed on the outside of the shaft (11); a spring (13) is sleeved on the outside of the shaft (11); a coil (14) is installed on the outside of the base (1); and a turntable (22) is installed on the outside of the ball bearing (12); An outer cylinder (2) is installed on the outer side of the rotating disk (22), and the outer cylinder (2) is sleeved on the outer side of the winding coil (14). A magnet (21) is installed on the inner wall of the outer cylinder (2). The spring (13) is located between two ball bearings (12), and there is an angle between the two ball bearings (12). The outer ring of the ball bearing (12) is fixedly connected to the rotating disk (22), and the inner ring of the ball bearing (12) is fixedly connected to the shaft body (11).

2. The high-precision brushless motor with a bearing structure as claimed in claim 1, characterized in that: The top of the mounting plate (3) is provided with symmetrically distributed vibration dampers (31), the top of the vibration dampers (31) is fixedly connected to the base (1), one end of the mounting plate (3) close to the base (1) is fixedly provided with auxiliary rods (32) distributed in a ring array, the outer side of the base (1) is fixedly sleeved with fixed blocks (33) distributed in a ring array, and four of the auxiliary rods (32) are movably inserted into the four fixed blocks (33).

3. The high-precision brushless motor with a bearing structure as claimed in claim 1, characterized in that: A control element (15) is installed in the base (1).

4. The high-precision brushless motor with a bearing structure as claimed in claim 1, characterized in that: A reserved assembly hole (23) is installed in the rotating disk (22).

5. The high-precision brushless motor with a bearing structure as claimed in claim 1, characterized in that: The magnet (21) is connected to the outer cylinder (2) by glue dispensing, and the turntable (22) is connected to the outer cylinder (2) by screw locking.

6. The high-precision brushless motor with a bearing structure as claimed in claim 1, characterized in that: The two sides of the mounting plate (3) are respectively provided with symmetrically distributed square grooves (4).

7. The high-precision brushless motor with a bearing structure as claimed in claim 6, characterized in that: Two bolts (41) are movably inserted in the square groove (4), and the bottom ends of the two bolts (41) located on the same side are fixedly connected with foot blocks (42).

8. The high-precision brushless motor with a bearing structure as claimed in claim 7, characterized in that: A hexagonal nut (43) is threadedly sleeved on the outer side of the bolt (41), and a fixing hole (44) is provided in the foot block (42).

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