Bearing structure with good impact resistance effect and motor
By setting inner and outer washer between motor bearings and eliminating bearing gaps with tightening components, the problem of relative displacement of traditional motor bearings in high impact environments is solved, and significant impact resistance performance improvement and motor stability are achieved. Improved durability.
Patent Information
- Application Number
- CN202421476220.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-25
AI Technical Summary
Traditional motor bearings are difficult to effectively resist the relative displacement of the inner and outer rings in high impact environments, resulting in increased wear and bearing damage, affecting the stability and durability of the motor.
An inner washer and an outer washer are arranged between adjacent bearings, and the inner ring and outer ring of the bearing are pressed against the washer through the first and second tightening components to eliminate bearing clearance and improve the impact resistance of the bearing.
It significantly improves the impact resistance of the motor, can withstand axial impact of 200g and an acceleration of 85/m/s, while maintaining the compact structure and cost control advantages of the motor.
Smart Images
Figure CN222458086U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of motors, and in particular to a bearing structure and a motor with good impact resistance. Background Art
[0002] In the field of motor technology, bearings are key components whose performance directly affects the stability and durability of motors. The impact resistance of bearings is directly related to the impact resistance of motors. Currently, when dealing with high-impact environments (such as motor-driven wheels), traditional motor bearing designs mainly resist impact by increasing the thickness of the inner and outer rings of the bearings or using high-strength materials. However, while these methods improve impact resistance, they also lead to an increase in motor size and manufacturing costs, and the effect is not significant.
[0003] More importantly, traditional methods have failed to effectively solve the problem of relative displacement between the inner and outer rings of bearings in high-impact environments. This relative displacement not only aggravates the wear of the bearings, but may also cause damage to the bearings, thus seriously affecting the stability and durability of the motor. Therefore, how to significantly improve the impact resistance of the motor while maintaining a compact motor structure and cost control has become a problem that needs to be solved urgently. Utility Model Content
[0004] In order to improve the axial impact resistance of a motor, the present application provides a bearing structure and a motor with good impact resistance.
[0005] The present application provides a bearing structure with good impact resistance and a motor using the following technical solutions:
[0006] A bearing structure and a motor with good impact resistance include a bearing, a rotating shaft and a fixed cylinder, the fixed cylinder is sleeved on the outside of the rotating shaft, the bearing is located between the fixed cylinder and the rotating shaft, the bearings are arranged at least two apart along the axial direction of the rotating shaft, an inner washer and an outer washer are arranged between two adjacent bearings, the two end surfaces of the inner washer are respectively abutted against the inner rings of the two adjacent bearings, and the two end surfaces of the outer washer are respectively abutted against the outer rings of the two adjacent bearings, a first tightening component for tightening the inner ring of the bearing from both sides is arranged on the rotating shaft; and a second tightening component for tightening the outer ring of the bearing from both sides is arranged on the fixed cylinder.
[0007] By adopting the above technical solution, the inner washer and the outer washer are arranged between two adjacent bearings. Under the action of the first clamping assembly and the second clamping assembly, the inner ring of the bearing is pressed against the inner washer, and the outer ring of the bearing is pressed against the outer washer. The inner rings and outer rings of multiple bearings are connected to each other, so that when the rotating shaft is subjected to axial force, the force can be transmitted along the axial direction of the rotating shaft to multiple inner rings or multiple outer rings, thereby improving the axial impact resistance of the bearing structure. Moreover, the force is not concentrated on the balls of the bearing, reducing the damage to the balls. The motor adopting the above bearing structure improves the stability and durability of the overall motor. Compared with traditional methods, this technology can achieve a significant improvement in impact resistance without increasing the size of the bearing or using high-cost materials, while maintaining the compact structure and cost control advantages of the motor.
[0008] Optionally, there is a size difference between the inner washer and the outer washer in a direction parallel to the axis of the rotating shaft.
[0009] By adopting the above technical solution, after the first clamping assembly and the second clamping assembly are clamped against the inner ring and outer ring of the bearing, due to the size difference between the inner washer and the outer washer, the different displacements of the outer ring and the inner ring can eliminate the bearing clearance, thereby limiting the relative change between the inner ring and the outer ring of the bearing, and further improving the impact resistance of the bearing structure.
[0010] Optionally, a size difference between the inner gasket and the outer gasket is defined as d, 0.09 mm ≤ |d| ≤ 0.11 mm.
[0011] By adopting the above technical solution, the size difference between the inner washer and the outer washer is controlled, so that the washer can effectively eliminate the bearing clearance and effectively press against the bearing.
[0012] Optionally, the first clamping assembly includes a first retaining ring and a first retaining member, the first retaining ring and the first retaining member are axially spaced apart along the rotating shaft, the bearing is disposed between the first retaining ring and the first retaining member, the first retaining ring is fixedly connected to the rotating shaft, the first retaining member is threadedly connected to the rotating shaft, and rotating the first retaining member can cause the first retaining member to press against the bearing.
[0013] By adopting the above technical solution, the retaining ring blocks the movement of the inner ring of the bearing on one side of the bearing, and the first clamping member applies force to the bearing from the other side, so that the inner ring of the bearing presses against the inner gasket, applying preload force to the bearing.
[0014] Optionally, the first clamping member is an annular structure, and the first clamping member is threadedly sleeved on the rotating shaft.
[0015] By adopting the above technical solution, the first pressing member is set to be annular, which increases the contact area between the first pressing member and the bearing, thereby improving the stability of the first pressing member after pressing against the bearing.
[0016] Optionally, the second clamping assembly includes a second retaining ring and a second retaining member, the second retaining ring and the second retaining member are arranged at intervals on both sides of the bearing along the length direction of the fixed cylinder, the second retaining ring is arranged inside the fixed cylinder and fixedly connected to the inner wall of the fixed cylinder, the outer ring of the bearing abuts on the second retaining ring, and the second retaining member abuts against the outer ring of the bearing and is fixedly connected to the fixed cylinder by screws.
[0017] By adopting the above technical solution, the second retaining ring is fixedly connected to the fixing tube to prevent the bearing outer ring from moving, and the second pressing member applies a force to the bearing outer ring from the other side, so that the bearing outer ring presses against the outer gasket.
[0018] Optionally, a guide groove is formed on the second pressing member, and an end of the fixing tube close to the second pressing member is inserted into the guide groove.
[0019] By adopting the above technical solution, the fixing tube is inserted into the guide groove, which can limit the position of the second fastening member, reduce the displacement of the second fastening member in the direction perpendicular to the axis of the rotating shaft, and improve the stability of the second fastening member after being fixed.
[0020] Optionally, a mounting plate is provided on the fixing tube corresponding to the second fastening member, a threaded hole is provided on the mounting plate, and the second fastening member is fixedly connected to the mounting plate by screws.
[0021] By adopting the above technical solution, a mounting plate is provided to provide mounting space for screw connection, thereby facilitating the installation of the second fastening member.
[0022] The present application also discloses a motor with good impact resistance
[0023] A motor with good impact resistance comprises the above-mentioned bearing structure, stator and rotor, wherein the rotor is fixedly connected to the rotating shaft, and the stator is fixedly connected to the fixing cylinder.
[0024] By adopting the above technical solution, the rotor is fixedly connected to the rotating shaft, realizing the rotational connection between the rotor and the fixed cylinder. At the same time, due to the use of the impact-resistant bearing structure, the overall axial impact resistance of the motor is improved.
[0025] In summary, the present application includes at least one of the following beneficial technical effects:
[0026] 1. The inner and outer washers limit the movement of the inner and outer rings of the bearing, increasing the axial impact resistance to 200g and enabling it to cope with an acceleration of 85 / s;
[0027] 2. There is a height difference between the inner washer and the outer washer to eliminate the clearance of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.
[0029] Figure 2 It is an exploded view of an embodiment of the present application along the axis of the rotating shaft.
[0030] Figure numerals: 1. rotating shaft; 11. mounting hole; 2. fixing cylinder; 3. first clamping assembly; 31. first retaining ring; 32. first clamping member; 4. second clamping assembly; 41. second retaining ring; 42. second clamping member; 43. guide groove; 44. mounting plate; 5. inner gasket; 6. outer gasket; 7. stator; 8. rotor; 9. connecting assembly; 91. connecting plate; 92. hoop; 93. insert; 10. bearing. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-2 This application is described in further detail.
[0032] The embodiment of the present application discloses a bearing structure with good impact resistance.
[0033] Reference Figure 1 and Figure 2 A bearing structure with good impact resistance includes a rotating shaft 1, a fixed cylinder 2, and at least two bearings 10 sleeved on the rotating shaft 1 along the axial direction of the rotating shaft 1. The fixed cylinder 2 is sleeved on the outside of the two bearings 10. An inner washer 5 and an outer washer 6 are arranged between two adjacent bearings 10, wherein the inner washer 5 is arranged corresponding to the inner ring of the bearing 10, and the outer washer 6 is arranged corresponding to the outer ring of the bearing 10. The sizes of the inner washer 5 and the outer washer 6 in the direction of their own axes are different. A first pressing component 3 for applying a force to the inner ring of the bearing 10 to make the inner rings of multiple bearings 10 approach each other is arranged on the rotating shaft 1; and a second pressing component 4 for applying a force to the outer ring of the bearing 10 to make the outer rings of multiple bearings 10 approach each other is arranged on the fixed cylinder 2. After the first pressing component 3 and the second pressing component 4 press against the inner ring and the outer ring of the bearing 10, due to the size difference between the inner washer 5 and the outer washer 6, the clearance between the inner ring and the outer ring of the bearing 10 is eliminated, thereby limiting the change between the inner ring and the outer ring of the bearing 10. Moreover, the two sides of the gasket are pressed against the inner ring and outer ring of the bearing 10, so that the forces exerted on the inner rings or outer rings of multiple bearings 10 can be transmitted, dispersing the impact force, thereby improving the axial impact resistance of the rotating shaft 1 to 200g, and at the same time allowing the rotating shaft 1 to adapt to an acceleration of up to 85 meters per second.
[0034] The dimension of the inner washer in the direction of its own axis is defined as h1, and the dimension of the outer washer in the direction of its own axis is defined as h2. h1-h2=d, and the range of |d| is 0.09-0.11 mm. In this embodiment, |d|=0.1 mm.
[0035] Reference Figure 1 and Figure 2 The first abutting assembly 3 includes a first retaining ring 31 sleeved on one end of the rotating shaft 1 and a first abutting member 32 threadedly connected to the end of the rotating shaft 1 away from the first retaining ring 31. The first retaining ring 31 is an annular structure. The first retaining ring 31 and the rotating shaft 1 are integrally formed to form a stepped shaft structure. The bearing 10 is located between the retaining ring and the first abutting member 32. Rotating the first abutting member 32 can make the first abutting member 32 abut against the bearing 10, thereby achieving abutment of the bearing 10 and connecting multiple bearings 10 to each other.
[0036] Reference Figure 1 and Figure 2 The first abutting member 32 is an annular structure, and an internal thread is arranged on the inner wall of the first abutting member 32. The rotating shaft 1 is provided with a thread groove corresponding to the first abutting member 32, and the first abutting member 32 is threadedly sleeved on the rotating shaft 1. The end surface of the first abutting member 32 close to the inner ring of the bearing 10 fits with the end surface of the inner ring of the bearing 10, thereby improving the uniformity of the force of the bearing 10 and further improving the impact resistance of the bearing 10.
[0037] Reference Figure 1 and Figure 2 The second abutting assembly 4 includes a second retaining ring 41 and a second retaining member 42, which are arranged along the length direction of the fixed cylinder 2. The bearing 10 is located between the second retaining ring 41 and the second retaining member 42. The second retaining ring 41 is a circular ring structure, which is arranged inside the fixed cylinder 2. The outer wall of the second retaining ring 41 is attached to the inner wall of the fixed cylinder 2 and is integrally formed. The second retaining member 42 is fixedly connected to the fixed cylinder 2 by screws and abuts against the outer ring of the bearing 10.
[0038] Reference Figure 1 and Figure 2 A mounting plate 44 is integrally formed on the fixing cylinder 2 at a position corresponding to the second abutting member 42, and a threaded hole is provided on the mounting plate 44. The second abutting member 42 is fixedly connected to the mounting plate 44 by screws to facilitate the fixing of the second abutting member 42. A guide groove 43 is provided on the second abutting member 42, and one end of the fixing cylinder 2 close to the second abutting member 42 is inserted into the guide groove 43, so that the position of the second abutting member 42 itself can be limited, and the stability of the second abutting member 42 after installation can be improved. At the same time, it is convenient for the staff to make the screw hole for inserting the screw on the second abutting member 42 correspond to the threaded hole on the mounting plate 44.
[0039] The implementation principle of a bearing structure and a motor with good impact resistance in an embodiment of the present application is: by setting an inner washer 5 and an outer washer 6, the connection between multiple bearings 10 is achieved, and at the same time the gap between the bearings 10 is eliminated, so that the axial force exerted on the bearing 10 can be transmitted along the outer ring or the inner ring of the bearing 10, thereby achieving the effect of improving the axial impact resistance.
[0040] The present application also discloses a motor with good impact resistance.
[0041] Reference Figure 1 and Figure 2 A motor with good impact resistance includes the above-mentioned bearing structure, and also includes a stator 7 sleeved outside the fixed cylinder 2 and a rotor 8 sleeved outside the stator 7 and fixedly connected to the rotating shaft 1. The rotor 8 is fixedly connected to the rotating shaft 1 to achieve a rotational connection between the rotor 8 and the fixed cylinder 2.
[0042] Reference Figure 1 and Figure 2 A connecting assembly 9 is provided between the rotor 8 and the rotating shaft 1, and the connecting assembly 9 includes a connecting disk 91 and a hoop 92. The connecting disk 91 is integrally formed with the rotating shaft 1 and is arranged at an end of the rotating shaft 1 away from the first abutting member 32. A circular ring-shaped insert 93 is provided on the side of the connecting disk 91 close to the first abutting member 32, and the hoop 92 is sleeved outside the insert 93 and fixedly connected to the insert 93. The rotor 8 is embedded in the hoop 92 and fixedly connected to the hoop 92, thereby realizing a fixed connection between the rotor 8 and the rotating shaft 1.
[0043] Reference Figure 1 and Figure 2 A mounting hole 11 is coaxially provided on the rotating shaft 1 to facilitate the installation of external equipment (for example, the motor in this application can be used in a pan-tilt device to install cameras, infrared transmitters, and other equipment).
[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A bearing structure with good impact resistance, comprising a bearing (10), characterized in that: The invention also comprises a rotating shaft (1) and a fixed cylinder (2), wherein the fixed cylinder (2) is sleeved on the outside of the rotating shaft (1), the bearing (10) is located between the fixed cylinder (2) and the rotating shaft (1), and the bearings (10) are arranged at least two apart in the axial direction of the rotating shaft (1), an inner washer (5) and an outer washer (6) are arranged between two adjacent bearings (10), the two end surfaces of the inner washer (5) respectively abut against the inner rings of the two adjacent bearings (10), and the two end surfaces of the outer washer (6) respectively abut against the outer rings of the two adjacent bearings (10), and the rotating shaft (1) is provided with a first tightening component (3) for tightening the inner ring of the bearing (10) from both sides; and the fixed cylinder (2) is provided with a second tightening component (4) for tightening the outer ring of the bearing (10) from both sides.
2. A bearing structure with good impact resistance according to claim 1, characterized in that: There is a size difference between the inner gasket (5) and the outer gasket (6) in a direction parallel to the axis of the rotating shaft (1).
3. A bearing structure with good impact resistance according to claim 2, characterized in that: The size difference between the inner gasket (5) and the outer gasket (6) is defined as d, 0.09 mm ≤ |d| ≤ 0.11 mm.
4. A bearing structure with good impact resistance according to claim 1, characterized in that: The first retaining assembly (3) comprises a first retaining ring (31) and a first retaining member (32); the first retaining ring (31) and the first retaining member (32) are arranged at intervals along the axial direction of the rotating shaft (1); the bearing (10) is arranged between the first retaining ring (31) and the first retaining member (32); the first retaining ring (31) is fixedly connected to the rotating shaft (1); the first retaining member (32) is threadedly connected to the rotating shaft (1); and the first retaining member (32) can be rotated to cause the first retaining member (32) to press against the bearing (10).
5. A bearing structure with good impact resistance according to claim 4, characterized in that: The first fastening member (32) is an annular structure, and the first fastening member (32) is threadedly sleeved on the rotating shaft (1).
6. A bearing structure with good impact resistance according to claim 1, characterized in that: The second retaining assembly (4) comprises a second retaining ring (41) and a second retaining member (42). The second retaining ring (41) and the second retaining member (42) are arranged at intervals on both sides of the bearing (10) along the length direction of the fixed cylinder (2). The second retaining ring (41) is arranged inside the fixed cylinder (2) and is fixedly connected to the inner wall of the fixed cylinder (2). The outer ring of the bearing (10) abuts against the second retaining ring (41). The second retaining member (42) abuts against the outer ring of the bearing (10) and is fixedly connected to the fixed cylinder (2) by screws.
7. A bearing structure with good impact resistance according to claim 6, characterized in that: The second abutting piece (42) is provided with a guide groove (43), and one end of the fixing tube (2) close to the second abutting piece (42) is inserted into the guide groove (43).
8. A bearing structure with good impact resistance according to claim 7, characterized in that: A mounting plate (44) is provided on the fixing cylinder (2) corresponding to the second fastening member (42), a threaded hole is provided on the mounting plate (44), and the second fastening member (42) is fixedly connected to the mounting plate (44) by means of screws.
9. A motor with good impact resistance, comprising a bearing (10) structure according to any one of claims 1 to 7, a stator (7) and a rotor (8), characterized in that: The rotor (8) is fixedly connected to the rotating shaft (1), and the stator (7) is fixedly connected to the fixed cylinder (2).