Motor shaft anti-loosening structure

Abstract

This utility model relates to a motor shaft anti-loosening structure, including a housing, a front cover at the front end of the housing, a rear cover at the rear end of the housing, a stator on the inner wall of the housing, a rotor rotatably mounted inside the stator, a connecting shaft at the center of the rotor, and the connecting shaft passing through the front and rear covers and extending to the outside of the housing. A second anti-loosening component is provided inside the front cover to prevent the connecting shaft from loosening, and a first anti-loosening component is provided on the outer side of the rear cover to prevent the connecting shaft from loosening. This utility model uses two sets of anti-loosening structures to limit the connecting shaft, preventing the connecting shaft from moving back and forth during rotation.

Description

Technical Field

[0001] This utility model relates to the field of motor shaft technology, specifically to a motor shaft anti-loosening structure. Background Technology

[0002] In modern industry, electric motors, as core power components, are widely used in machinery, automated production lines, transportation, and many other fields. The motor shaft, as a key component for outputting power, directly affects the motor's operational stability and the overall performance of the equipment. During motor operation, factors such as vibration, impact, temperature changes, and alternating loads can cause the connection between the motor shaft and mating components to loosen, leading to back-and-forth movement, transmission failure, increased noise, and even equipment malfunctions and safety accidents.

[0003] Existing anti-loosening structures for motor shafts also have some other problems. For example, some anti-loosening structures use a single anti-loosening measure such as an elastic anti-detachment ring, which has limited anti-loosening effect and is prone to failure under long-term use or harsh working conditions; some anti-loosening structures can provide good anti-loosening performance, but the installation and disassembly process is complicated, which increases the difficulty and cost of equipment maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a motor shaft anti-loosening structure, which uses two sets of anti-loosening structures to limit the connecting shaft and prevent the connecting shaft from moving back and forth during rotation.

[0005] To address the problems in the prior art, this utility model provides a motor shaft anti-loosening structure, including a housing, a front cover at the front end of the housing, a rear cover at the rear end of the housing, a stator on the inner wall of the housing, a rotor rotatably mounted inside the stator, a connecting shaft at the center of the rotor, and the connecting shaft passing through the front cover and the rear cover and extending to the outside of the housing. A second anti-loosening component is provided inside the front cover to prevent the connecting shaft from loosening, and a first anti-loosening component is provided on the outer side of the rear cover to prevent the connecting shaft from loosening.

[0006] Preferably, the first anti-loosening component includes a first bearing seat located at the center of the outer side of the rear cover, and a first bearing is provided inside the first bearing seat. The inner ring of the first bearing protrudes outward to form a first connecting disc. The first anti-loosening component also includes a first connector sleeved on the connecting shaft. The first connector and the first connecting disc are fixed by bolts.

[0007] Preferably, the center of the first connector protrudes outward to form a connecting sleeve, one end of the connecting shaft is also provided with a positioning hole, and the connecting sleeve is also provided with a bolt for fixing the connecting shaft and the connecting sleeve.

[0008] Preferably, the first bearing housing is further fitted with a first protective cover for protecting the first bearing.

[0009] Preferably, the second anti-loosening component includes a second bearing seat fixed at the center of the front cover, a second bearing is disposed inside the second bearing seat, the inner ring of the second bearing protrudes in the direction of the rotor to form a second connecting disc, and the second anti-loosening component also includes a second connector fixed on the connecting shaft, the second connector and the second connecting disc being fixedly connected by bolts.

[0010] Preferably, the second anti-loosening component further includes a second protective cover that can be connected to the second bearing housing and is used to protect the second bearing, the second protective cover being bolted to the second bearing housing.

[0011] The advantages of this utility model compared to the prior art are:

[0012] 1. The motor shaft anti-loosening structure of this application adopts a two-stage anti-loosening design to improve connection reliability. A first bearing is assembled in a first bearing housing located at the center of the motor rear cover. A first connecting disc with an outwardly protruding inner ring of the first bearing provides a structural basis for axial positioning. A first connector is coaxially sleeved on the connecting shaft. The first connector and the first connecting disc are connected by bolts. The connecting sleeve of the first connector is fastened to the connecting shaft by bolts. The frictional torque generated by the bolt preload effectively restricts the axial movement of the connecting shaft, solving the problem of forward and backward displacement caused by axial force during motor operation, and achieving the primary anti-loosening function.

[0013] 2. To further enhance anti-loosening performance, a second bearing housing is fixedly connected to the center of the front cover, housing a second bearing. The inner ring of this second bearing also extends to form a second connecting disc. The second connecting disc is bolted to the second connector, forming a secondary anti-loosening structure. This design, through the rigid connection between the second bearing housing and the second connector, further constrains the axial and radial degrees of freedom of the connecting shaft, effectively suppressing the risk of loosening caused by vibration and impact. The two-stage anti-loosening structure works together, constructing a three-dimensional anti-loosening system through dual constraints at the front and rear ends. Compared with traditional single-stage anti-loosening solutions, this significantly improves the stability and reliability of the motor shaft under high-speed rotation and harsh operating conditions, effectively reducing the probability of equipment failure due to shaft loosening and extending the overall service life of the motor. Attached Figure Description

[0014] Figure 1 This is a first three-dimensional structural diagram of a motor shaft anti-loosening structure according to the present invention.

[0015] Figure 2 This is a second three-dimensional structural diagram of a motor shaft anti-loosening structure according to the present invention.

[0016] Figure 3This is a first exploded structural diagram of an anti-loosening structure for a motor shaft according to this utility model.

[0017] Figure 4 This is a cross-sectional structural diagram of the housing and the second anti-loosening component of a motor shaft anti-loosening structure according to this utility model.

[0018] Figure 5 This is a second exploded structural diagram of a motor shaft anti-loosening structure according to this utility model.

[0019] Figure 6 This is a three-dimensional structural diagram of the stator and rotor of a motor shaft anti-loosening structure according to this utility model.

[0020] The following are the labels in the diagram: 1. Housing; 11. Front cover; 12. Rear cover; 2. First anti-loosening component; 21. First bearing seat; 22. First bearing; 23. First connecting plate; 24. First protective cover; 25. First connector; 251. Connecting sleeve; 3. Stator; 4. Rotor; 41. Connecting shaft; 411. Positioning hole; 5. Second anti-loosening component; 51. Second connector; 52. Second bearing seat; 53. Second bearing; 54. Second connecting plate; 55. Second protective cover. Detailed Implementation

[0021] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-6As shown, this utility model provides a motor shaft anti-loosening structure, including a housing 1. A front cover 11 is provided at the front end of the housing 1, and a rear cover 12 is provided at the rear end. A stator 3 is provided on the inner wall of the housing 1, and a rotor 4 is rotatably mounted inside the stator 3. The rotor 4 is located inside the stator 3 and can rotate relative to the stator 3. Under the influence of the magnetic field generated by the stator 3, the rotor 4 is subjected to electromagnetic force and rotates, thereby converting electrical energy into mechanical energy and driving the connecting shaft 41 to rotate. The connecting shaft 41 is located at the center of the rotor 4. The connecting shaft 41 is the component that outputs power from the motor, transmitting the rotational motion of the rotor 4 to external equipment, realizing the power output function of the motor, and is the key link for power transmission between the motor and external equipment. The housing 1, as the main frame of the entire motor shaft anti-loosening structure, provides space for the installation and support of the internal stator 3 and rotor 4, playing a crucial role in protecting the internal structure, fixing the relative positions of various components, and ensuring that all components inside the motor can operate in a stable environment. Furthermore, the connecting shaft 41 can pass through the front cover 11 and the rear cover 12 and extend to the outside of the housing 1. The front cover 11 is provided with a second anti-loosening component 5 to prevent the connecting shaft 41 from loosening. The rear cover 12 is provided with a first anti-loosening component 2 to prevent the connecting shaft 41 from loosening. The first anti-loosening component 2 and the second anti-loosening component 5 are to prevent the connecting shaft 41 from loosening and ensure that the connecting shaft 41 remains stable during operation.

[0023] When the motor is working, the stator 3 generates a magnetic field, and the rotor 4 begins to rotate under the influence of the magnetic field. The rotation of the rotor 4 drives the connecting shaft 41 to rotate as well, outputting the motor's power to external equipment. At this time, the second anti-loosening component 5, located inside the front cover 11, and the first anti-loosening component 2, located outside the rear cover 12, work together to constrain the connecting shaft 41 through their respective anti-loosening structures, preventing the connecting shaft 41 from moving axially and ensuring that the connecting shaft 41 always maintains a stable rotational state. This ensures that the motor can operate normally and stably, efficiently converting electrical energy into mechanical energy and outputting it to external equipment.

[0024] The first anti-loosening component 2 includes a first bearing seat 21 located at the center of the outer side of the rear cover 12, and a first bearing 22 is disposed inside the first bearing seat 21. The inner ring of the first bearing 22 protrudes outward to form a first connecting disc 23. The first anti-loosening component 2 also includes a first connector 25 sleeved on the connecting shaft 41. The first connector 25 and the first connecting disc 23 are fixed by bolts. A connecting sleeve 251 protrudes outward from the center of the first connector 25. A positioning hole 411 is also provided at one end of the connecting shaft 41. Bolts for fixing the connecting shaft 41 and the connecting sleeve 251 are also provided in the connecting sleeve 251. A first protective cover 24 for protecting the first bearing 22 is also sleeved on the first bearing seat 21.

[0025] When the connecting shaft 41 rotates, the inner ring of the first bearing 22 rotates synchronously through the transmission of the connecting sleeve 251 and the first connector 25. The outer ring of the first bearing 22 is fixed on the first bearing seat 21, providing stable support. The first protective cover 24 protects the first bearing 22 from interference and damage from the external environment. The first anti-loosening assembly 2, through the coordinated action of components such as the first bearing seat 21, the first bearing 22, the first connecting disc 23, the first connector 25, the connecting sleeve 251, the positioning hole 411, and the first protective cover 24, achieves stable rotation and effective protection of the connecting shaft 41.

[0026] The second anti-loosening component 5 includes a second bearing seat 52 fixed at the center of the front cover 11. A second bearing 53 is disposed inside the second bearing seat 52. The inner ring of the second bearing 53 protrudes towards the rotor 4 to form a second connecting disc 54. The second anti-loosening component 5 also includes a second connector 51 fixed to the connecting shaft 41. The second connector 51 and the second connecting disc 54 are fixedly connected by bolts. The second anti-loosening component 5 also includes a second protective cover 55 that can be connected to the second bearing seat 52 and is used to protect the second bearing 53. The second protective cover 55 is bolted to the second bearing seat 52.

[0027] When rotor 4 rotates, the second connector 51 and connecting shaft 41 rotate synchronously through the transmission of the second bearing 53 and the second connecting disc 54. The second bearing housing 52 provides stable support, ensuring smooth rotation, while the second protective cover 55 protects the second bearing 53 from external environmental contamination and damage. The second anti-loosening assembly 5, through the coordinated action of components such as the second bearing housing 52, the second bearing 53, the second connecting disc 54, the second connector 51, and the second protective cover 55, achieves stable rotation and effective protection for rotor 4 and connecting shaft 41. Its reasonable design and compact structure can meet the usage requirements under various complex working conditions and improve the reliability and lifespan of the overall mechanical system.

[0028] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A motor shaft anti-loosening structure, characterized in that: The device includes a housing (1), a front cover (11) at the front end of the housing (1), a rear cover (12) at the rear end of the housing (1), a stator (3) on the inner wall of the housing (1), a rotor (4) rotatably mounted inside the stator (3), a connecting shaft (41) at the center of the rotor (4), and the connecting shaft (41) can pass through the front cover (11) and the rear cover (12) and extend to the outside of the housing (1). The front cover (11) is provided with a second anti-loosening component (5) to prevent the connecting shaft (41) from loosening, and the rear cover (12) is provided with a first anti-loosening component (2) to prevent the connecting shaft (41) from loosening on the outer side.

2. The motor shaft anti-loosening structure according to claim 1, characterized in that: The first anti-loosening component (2) includes a first bearing seat (21) located at the center of the outer side of the rear cover (12), and a first bearing (22) is provided inside the first bearing seat (21). The inner ring of the first bearing (22) protrudes outward to form a first connecting disc (23). The first anti-loosening component (2) also includes a first connector (25) sleeved on the connecting shaft (41). The first connector (25) and the first connecting disc (23) are fixed by bolts.

3. The motor shaft anti-loosening structure according to claim 2, characterized in that: The first connector (25) has a connecting sleeve (251) protruding outward from the center position. One end of the connecting shaft (41) is also provided with a positioning hole (411). The connecting sleeve (251) is also provided with a bolt for fixing the connecting shaft (41) and the connecting sleeve (251).

4. The motor shaft anti-loosening structure according to claim 2, characterized in that: The first bearing housing (21) is also fitted with a first protective cover (24) for protecting the first bearing (22).

5. The motor shaft anti-loosening structure according to claim 1, characterized in that: The second anti-loosening component (5) includes a second bearing seat (52) fixed at the center of the front cover (11), a second bearing (53) is provided inside the second bearing seat (52), the inner ring of the second bearing (53) protrudes towards the rotor (4) to form a second connecting disc (54), and the second anti-loosening component (5) also includes a second connector (51) fixed on the connecting shaft (41), and the second connector (51) and the second connecting disc (54) are fixedly connected by bolts.

6. The motor shaft anti-loosening structure according to claim 1, characterized in that: The second anti-loosening component (5) also includes a second protective cover (55) that can be connected to the second bearing housing (52) and is used to protect the second bearing (53). The second protective cover (55) is connected to the second bearing housing (52) by bolts.

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