Motor with end locking mechanism

Abstract

The utility model discloses a motor with an end locking mechanism, which comprises a motor shell, a front end cover, a rear end cover, a stator, a rotor core and a rotating shaft, the front end cover and the rear end cover are respectively arranged at the front end and the rear end of the motor shell, the rotating shaft is rotatably arranged in the motor shell, the rotor core is arranged on the outer side of the middle of the rotating shaft, and the stator is arranged on the rotor core. A stator is arranged on the outer side of the rotor core, bearings are arranged in the middle of the front end cover and the middle of the rear end cover, the two sides of the rotating shaft are connected with the bearings respectively, an opening part is arranged in the middle of the front end cover, a primary locking part is in threaded connection with the opening part, the primary locking part comprises a rotating part and a pressing part which are integrally formed, and the pressing part is in threaded connection with the rotating part. The pressing piece extends into the opening part and abuts against the outer ring of the bearing, and a second-stage locking part is arranged on the surface, located on the side edge of the first-stage locking part, of the front end cover. According to the scheme, the bearing can be conveniently locked.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a motor with an end locking mechanism. Background Art

[0002] Motors typically have an inner rotor structure, with bearings at both the front and rear ends of the rotor. A small gap exists between the bearings and the bearing housing. Due to the high-speed rotation of the rotor, over long periods of operation, the inner ring of the bearing will drive the outer ring of the bearing, causing friction between the outer ring and the bearing housing. Simultaneously, the bearing may experience axial reciprocating movement. This can damage the bearings, disrupting their fit, leading to abnormal vibration and even damage to the motor.

[0003] Chinese patent application number 2011205357784 discloses a motor bearing locking structure, including a rotating shaft and a bearing; a locking cover is provided at the end of the rotating shaft; the end face of the locking cover abuts against the outer end face of the inner ring of the bearing; the rotating shaft is fixedly connected with a locking bolt along the axial direction; the rod of the locking bolt passes through the locking cover and cooperates with the rotating shaft; a locking plate is provided between the head of the locking bolt and the locking cover; the edge of the locking plate is turned outward and clamps the head of the locking bolt.

[0004] The above solution is also a method for locking bearings, similar to existing technologies, in that bolts are used to lock the inner or outer ring of the corresponding bearing. However, this structure requires additional machining of the bearings, which is difficult due to their small size. Furthermore, since the locking is performed in the bearing chamber inside the motor, the limited operating space makes it difficult to operate. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a motor with an end locking mechanism, including a motor housing, a front end cover, a rear end cover, a stator, a rotor core and a rotating shaft, the front end cover and the rear end cover are respectively installed at the front and rear ends of the motor housing, the rotating shaft is rotatably arranged inside the motor housing, the middle outer side of the rotating shaft is provided with a rotor core, the outer side of the rotor core is provided with a stator, bearings are provided in the middle of the front end cover and the rear end cover, the two sides of the rotating shaft are respectively connected to the bearings, an opening is provided in the middle of the front end cover, a first-level locking part is threadedly connected to the opening, the first-level locking part includes an integrally formed rotating part and a pressing part, the pressing part extends to the inside of the opening and abuts against the outer ring of the bearing, and the surface of the front end cover is located on the side of the first-level locking part and a second-level locking part is provided.

[0006] Preferably, the rotating member is a hexagonal structure, the pressing member is a cylindrical structure, the outside of the pressing member is provided with a thread, and an axial hole is formed in the middle of the rotating member and the pressing member.

[0007] Preferably, the secondary locking portion includes a first fixing plate fixed around the rotating member, a locking bolt is provided on the first fixing plate, and a locking plate is provided at one end of the locking bolt facing the rotating member.

[0008] Preferably, the rotating member is a disc-shaped structure, the outer periphery of the rotating member is provided with gear teeth, the outside of the pressing member is provided with threads, and an axial hole is formed in the middle of the rotating member and the pressing member.

[0009] Preferably, the secondary locking portion includes a second fixed plate fixed around the rotating member, a sliding cavity is provided on the second fixed plate, a sliding rod is provided on the sliding cavity, the sliding rod is connected to a rack plate at one end close to the rotating member, a return spring is provided on the outer side of the sliding rod, one end of the return spring is connected to the rack plate, and the other end of the return spring is fixed to the second fixed plate.

[0010] Preferably, a first magnetic member is provided at the bottom of the sliding rod, and a second magnetic member is provided at the bottom of the sliding cavity, and the first magnetic member and the second magnetic member magnetically repel each other.

[0011] The advantages of the utility model are:

[0012] 1. This solution's primary locking mechanism utilizes an integrated rotating and holding element. Rotating the rotating element outside the motor creates close contact between the holding element and the bearing outer ring, achieving a squeezed, secure fit. This design not only offers a compact structure but also evenly distributes the locking force, effectively preventing rotation and axial reciprocating movement of the bearing outer ring, improving locking reliability and stability.

[0013] 2. This solution does not require machining of the bearings, and the locking operation is moved to the outside of the motor, which not only reduces the difficulty of machining, but also reduces the difficulty of the locking operation.

[0014] 3. This solution features a secondary locking mechanism that prevents the rotating member from loosening after being locked, providing a double guarantee for locking. This dual locking mechanism effectively prevents bearing loosening and outer ring rotation when the motor is running at high speed or under heavy load. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the external structure diagram of the motor of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the motor of this utility model.

[0017] Figure 3 This is a structural diagram of the rotating part of Example 1 of the utility model.

[0018] Figure 4This is a surface structural diagram of the front end cover of Example 1 of the present utility model.

[0019] Figure 5 This is the secondary locking part structure of Example 1 of the utility model.

[0020] Figure 6 This is a structural diagram of the rotating part of Example 2 of the present utility model.

[0021] Figure 7 This is a surface structural diagram of the front end cover of Example 2 of the present utility model.

[0022] Figure 8 This is the secondary locking structure of Example 2 of the present utility model.

[0023] In the figure: 1 motor housing, 2 front end cover, 3 rear end cover, 4 stator, 5 rotor core, 6 rotating shaft, 7 bearing, 8 opening, 9 rotating member, 10 pressing member, 11 shaft hole, 12 first fixing plate, 13 locking bolt, 14 locking plate, 15 gear teeth, 16 second fixing plate, 17 sliding cavity, 18 sliding rod, 19 rack plate, 20 return spring, 21 first magnetic member, 23 second magnetic member. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a communication between the two elements. At the same time, when an element is referred to as "fixed on" or "provided on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is referred to as being "fixedly connected to" another element, it can be a common fixed connection method such as welding, bolt connection, or gluing connection. In short, for ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Example 1, as Figure 1-2 As shown, a motor with an end locking mechanism includes a motor housing 1, a front cover 2, a rear cover 3, a stator 4, a rotor core 5, and a rotating shaft 6. The front cover 2 and the rear cover are respectively mounted at the front and rear ends of the motor housing 1. The rotating shaft 6 is rotatably arranged inside the motor housing 1. The rotor core 5 is arranged on the middle outer side of the rotating shaft 6, and the stator 4 is arranged on the outer side of the rotor core 5. The rotating shaft 6 supports the rotor core 5 and the stator 4 and allows them to rotate freely. The front cover 2 and the rear cover 3 are each provided with a bearing chamber in the middle, each housing a bearing 7. The two sides of the rotating shaft 6 pass through the bearings 7 on both sides and are fixedly connected to the inner rings of the bearings 7.

[0028] Combine Figure 2-3 In this embodiment, a circular opening portion 8 is opened in the middle of the front end cover 2, and a first-level locking portion is threadedly connected to the opening portion 8. The first-level locking portion includes an integrally formed rotating member 9 and a pressing member 10. The rotating member 9 is a hexagonal structure. The hexagonal structure provides multiple flat sides, so that the operator can easily hold and rotate the rotating member 9 with a wrench, a screwdriver or other special tools. The pressing member 10 is a cylindrical structure. The outside of the pressing member 10 is provided with a thread. The pressing member 10 extends to the inside of the opening portion 8 and abuts against the outer ring of the bearing 7. After rotating the rotating member 9, the pressing member 10 can be moved axially in the direction of the bearing 7 and further squeezed with the outer ring of the bearing 7, squeezing and locking the outer ring of the bearing 7 to prevent the bearing 7 from axial movement and rotation.

[0029] By rotating the member 9, the pressing member 10 is brought into close contact with the outer ring of the bearing 7, achieving a squeeze-locked connection. This design not only offers a compact structure but also evenly distributes the locking force, effectively preventing the outer ring of the bearing 7 from rotating and axially reciprocating, thereby improving the reliability and stability of the locking. Furthermore, this solution eliminates the need for machining the bearing 7, and the locking operation is performed externally to the motor, reducing both machining and locking complexity. In addition to the primary locking portion provided on the front end cover 2, a primary locking portion of the same structure can also be provided on the rear end cover 3 to lock the bearing 7.

[0030] Combine Figure 4-5 In this embodiment, the secondary locking mechanism includes a first fixing plate 12 secured around the rotating member 9. A locking bolt 13 is provided on the first fixing plate 12, and a locking plate 14 is provided on the end of the locking bolt 13 facing the rotating member 9. The first fixing plate 12 is fixed to the front end cover 2. By rotating the locking bolt 13, the locking plate 14 can be moved closer to or further away from the rotating member 9, conveniently adjusting the degree of locking of the locking plate 14 on the rotating member 9 to meet the required locking force under different operating conditions and prevent the rotating member 9 from rotating after being locked. In this embodiment, four secondary locking mechanisms are provided around the rotating member 9. The tightening effect of the multiple locking bolts 13 is evenly distributed around the rotating member 9, making the locking force more stable and reducing the risk of locking failure due to vibration or impact. The secondary locking mechanism further secures the rotating member 9 through the locking bolts 13 and the locking plate 14, providing a double guarantee for the locking effect. This dual locking mechanism effectively prevents the bearing 7 from loosening when the motor is running at high speed or under heavy load. In this embodiment, the number of the secondary locking parts is at least one and can be six at most.

[0031] Example 2, as Figure 6-8As shown, a motor with an end locking mechanism is shown. The difference between this embodiment and embodiment 1 is that: the rotating member 9 is a disc-shaped structure, the outer periphery of the rotating member 9 is provided with gear teeth 15, the outside of the pressing member 10 is provided with a thread, and an axial hole 11 is formed in the middle of the rotating member 9 and the pressing member 10. The secondary locking part includes a second fixed plate 16 fixed around the rotating member 9, the second fixed plate 16 is provided with a sliding cavity 17, the sliding cavity 17 is provided with a sliding rod 18, and the sliding rod 18 is connected to a rack plate 19 at one end close to the rotating member 9. A reset spring 20 is provided on the outer side of the sliding rod 18, one end of the reset spring 20 is connected to the rack plate 19, and the other end of the reset spring 20 is fixed to the second fixed plate 16. Before rotating the rotating member 9, the rack plate 19 is pressed to move it away from the rotating member 9, causing the return spring 20 to contract. After the rotating member 9 is locked, the return spring 20 is reset, and the rack plate 19 is moved closer to the rotating member 9 until the side of the rack plate 19 with the rack engages with the gear teeth 15 on the outside of the rotating member 9, thereby preventing the rotating member 9 from rotating. The number of sliding cavities 17 and sliding rods 18 in this solution can be adjusted as needed. In this embodiment, three sliding cavities 17 and sliding rods 18 are provided to ensure structural stability.

[0032] In this solution, the operator can control the movement of the rack plate 19 through simple push-pull operations, thereby locking or unlocking the rotating member 9. This intuitive operation method reduces operational difficulty and improves operational efficiency. The number of secondary locking parts in this embodiment can also be adjusted according to needs.

[0033] A first magnetic member 21 is located at the bottom of the sliding rod 18, and a second magnetic member 23 is located at the bottom of the sliding cavity 17. The elasticity of the return spring 20 may weaken over time, usage, or environmental conditions. The first magnetic member 21 and the second magnetic member 23 are magnetically repelling, for example, if the first magnetic member 21 has a north pole and the second magnetic member has a north pole. The introduction of magnetic members can reduce the reliance on the elasticity of the return spring 20 to a certain extent, improving the long-term stability and reliability of the secondary locking mechanism.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor with an end locking mechanism, characterized in that: The motor comprises a motor housing (1), a front end cover (2), a rear end cover (3), a stator (4), a rotor core (5) and a rotating shaft (6), wherein the front end cover (2) and the rear end cover (3) are respectively mounted at the front and rear ends of the motor housing (1), the rotating shaft (6) is rotatably arranged inside the motor housing (1), the rotor core (5) is provided on the middle outer side of the rotating shaft (6), the stator (4) is provided on the outer side of the rotor core (5), the front end cover (2) and the rear end cover (3) are both provided with bearings (7) in the middle, the two sides of the rotating shaft (6) are respectively connected to the bearings (7), the front end cover (2) is provided with an opening (8) in the middle, the opening (8) is threadedly connected with a primary locking part, the primary locking part comprises an integrally formed rotating part (9) and a pressing part (10), the pressing part (10) extends to the inside of the opening (8) and abuts against the outer ring of the bearing (7), and the surface of the front end cover (2) is provided with a secondary locking part on the side of the primary locking part.

2. The motor with an end locking mechanism according to claim 1, characterized in that: The rotating member (9) is a hexagonal structure, the pressing member (10) is a cylindrical structure, a thread is provided on the outside of the pressing member (10), and an axial hole (11) is formed in the middle of the rotating member (9) and the pressing member (10).

3. The motor with an end locking mechanism according to claim 2, characterized in that: The secondary locking portion comprises a first fixing plate (12) fixed around the rotating member (9), a locking bolt (13) being provided on the first fixing plate (12), and a locking plate (14) being provided at one end of the locking bolt (13) facing the rotating member (9).

4. The motor with an end locking mechanism according to claim 1, characterized in that: The rotating member (9) is a disc-shaped structure. The outer periphery of the rotating member (9) is provided with gear teeth (15). The outside of the pressing member (10) is provided with threads. An axial hole (11) is formed in the middle of the rotating member (9) and the pressing member (10).

5. The motor with an end locking mechanism according to claim 4, characterized in that: The secondary locking portion includes a second fixed plate (16) fixed around the rotating member (9), a sliding cavity (17) is provided on the second fixed plate (16), a sliding rod (18) is provided on the sliding cavity (17), and an end of the sliding rod (18) close to the rotating member (9) is connected to a rack plate (19), and a return spring (20) is provided on the outer side of the sliding rod (18), one end of the return spring (20) is connected to the rack plate (19), and the other end of the return spring (20) is fixed to the second fixed plate (16).

6. The motor with an end locking mechanism according to claim 5, characterized in that: A first magnetic member (21) is provided at the bottom of the sliding rod (18), and a second magnetic member (23) is provided at the bottom of the sliding cavity (17). The first magnetic member (21) and the second magnetic member (23) magnetically repel each other.

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