Direct current motor with sealed bearing

Abstract

The utility model relates to the technical field of motors, in particular to a direct-current motor with a sealed bearing, which comprises a motor body, the motor body comprises a shell body, a front end cover is mounted at one end of the shell body, limiting grooves are symmetrically formed in the middle of the front end cover, a drawing assembly is fixedly mounted in a cavity of each limiting groove, and the drawing assembly comprises a fixed seat. One side of the fixing seat is in threaded connection with one side of the shell bearing, four corners of the nut plate are in threaded connection with the bottom of the front end cover, the plug screw is installed in the middle of the fixing seat and the nut plate, the first fixing ring is installed on the top face of the fixing seat through bolts, and the second fixing ring is installed on the top of the plug screw in a sleeving mode. According to the utility model, the fixed seat of the drawing assembly is in threaded connection with one side of the bearing of the shell, the plug screw is arranged between the fixed seat and the nut plate, and the relative position of the plug screw between the fixed seat and the nut plate is changed by rotating the plug screw, so that the bearing is driven to move up and down, and the bearing can be conveniently disassembled when needed.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a DC motor with a sealed bearing. Background Technology

[0002] A DC motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. After being connected to a DC power supply, a DC motor's rotor begins to rotate in contact with the magnetic field through contact with the commutator. Therefore, it is widely used in smart door locks and other home and children's toy industries.

[0003] The original design of the sealed bearings in existing DC motors was to prevent external contaminants from entering the motor and to protect the bearings and lubricating oil from damage. However, this design also means that when the bearing needs to be replaced or repaired, the entire motor may need to be disassembled to replace the bearing, and the non-removable sealed bearings may lead to increased maintenance costs. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] A DC motor with a sealed bearing includes a motor body, the motor body including a housing body, a rotor assembly disposed inside the housing body, a rotating shaft connected to the middle of the rotor assembly, a front end cover installed at one end of the housing body, a housing bearing movably mounted in the middle of the front end cover, the housing bearing being sleeved on the middle of the rotating shaft, a limiting groove symmetrically formed in the middle of the front end cover, a pull-out assembly fixedly installed in the cavity of the limiting groove, the pull-out assembly being symmetrically installed on both sides of the housing bearing, the pull-out assembly including a fixed seat, a screw, a nut plate, a first fixing ring and a second fixing ring, one side of the fixed seat being threadedly connected to one side of the housing bearing, the four corners of the nut plate being threadedly connected to the bottom of the front end cover, the screw being installed in the middle of the fixed seat and the nut plate, the first fixing ring being bolted to the top surface of the fixed seat, the second fixing ring being sleeved on the top of the screw, and a connecting rod being fixedly connected between the second fixing ring and the fixed seat.

[0006] As an improvement to the above technical solution, the upper surface of the first fixing ring is threaded with several sets of support rods, and the middle part of the connecting rod is inserted and installed at the other end of the support rod.

[0007] As an improvement to the above technical solution, several sets of second support blocks are threaded around the second fixing ring, and first support blocks are threaded at the four corners of the fixing seat. One end of the connecting rod is fixedly connected to the first support block, and one end of the connecting rod is fixedly connected to the second support block.

[0008] As an improvement to the above technical solution, a handle nut is fixedly installed on the top of the screw.

[0009] As an improvement to the above technical solution, the middle parts of the fixed seat, nut plate, first fixed ring and second fixed ring are at the same center, and the inner walls are all provided with threads. The plug screw is threaded inside the fixed seat, nut plate, first fixed ring and second fixed ring.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model uses a threaded connection between the fixed seat of the pull-out assembly and one side of the housing bearing to ensure stability. A plug screw is installed between the fixed seat and the nut plate. By rotating the plug screw, its relative position between the fixed seat and the nut plate can be changed, thereby driving the bearing to move up and down. This fine-tuning function ensures a precise fit between the bearing, the shaft, and the front cover, guaranteeing both sealing and rotational stability. The tight fit between the housing bearing and the pull-out assembly effectively prevents external contaminants from entering the motor, protecting the bearing and lubricating oil from damage. This allows the pull-out assembly to be easily disassembled and the housing bearing replaced when needed, reducing maintenance costs and time.

[0012] 2. This utility model provides a stable and reliable support platform for the plug screw by firmly fixing the nut plate to the bottom of the front cover. This helps to maintain the stability of the plug screw during the adjustment process and prevents it from loosening or deforming due to uneven force. The first fixing ring enhances the connection strength between the fixing seat and the bearing. The connecting rod enhances the connection strength between the second fixing ring and the fixing seat. The connecting rod is used for fixed connection and transmits the force of the second fixing ring to the fixing seat, thereby dispersing the stress and vibration generated by the bearing during operation. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present invention;

[0014] Figure 2 This is a cross-sectional view of the outer shell of this utility model;

[0015] Figure 3 This is a cross-sectional view of the front cover of this utility model;

[0016] Figure 4 This is a structural diagram of the pull-out component of this utility model.

[0017] Reference numerals: 1. Motor body; 11. Housing body; 12. Front cover; 121. Limiting groove; 13. Rotor assembly; 14. Shaft; 2. Housing bearing; 3. Pull-out assembly; 31. Fixing base; 311. First support block; 32. Plug screw; 321. Handle nut; 33. Nut plate; 34. First fixing ring; 341. Support rod; 35. Second fixing ring; 351. Second support block; 36. Connecting rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution:

[0020] A DC motor with a sealed bearing includes a motor body 1, which includes a housing body 11. A rotor assembly 13 is disposed inside the housing body 11. A rotating shaft 14 is connected to the middle of the rotor assembly 13. A front end cover 12 is installed at one end of the housing body 11. A housing bearing 2 is movably mounted in the middle of the front end cover 12 and is sleeved on the middle of the rotating shaft 14. A limiting groove 121 is symmetrically formed in the middle of the front end cover 12. A pull-out assembly 3 is fixedly installed in the cavity of the limiting groove 121 and symmetrically mounted on the housing bearing. On both sides of 2, the pull-out assembly 3 includes a fixed seat 31, a screw 32, a nut plate 33, a first fixing ring 34, and a second fixing ring 35. One side of the fixed seat 31 is threaded to one side of the outer shell bearing 2. The four corners of the nut plate 33 are threaded to the bottom of the front end cover 12. The screw 32 is installed in the middle of the fixed seat 31 and the nut plate 33. The first fixing ring 34 is bolted to the top surface of the fixed seat 31. The second fixing ring 35 is sleeved on the top of the screw 32. A connecting rod 36 is fixedly connected between the second fixing ring 35 and the fixed seat 31.

[0021] In this embodiment, the outer shell 11 of the motor body 1 serves as the main structure of the motor, protecting the internal components from the influence of the external environment and providing necessary mechanical support. The rotating shaft 14 connects to the rotor assembly 13, transmitting rotational power to the external load. The front cover 12 is installed at one end of the motor to enclose the internal space of the motor and support the outer shell bearing 2. The outer shell bearing 2 is sleeved in the middle of the rotating shaft 14, providing stable rotational support for the rotating shaft 14 and preventing external contaminants from entering the motor. The symmetrical limiting groove 121 design on the front cover 12 provides an installation position for the pull-out assembly 3, enhancing the symmetry and stability of the structure. The fixing seat 31 of the pull-out assembly 3 is installed on one side of the outer shell bearing 2 via a threaded connection to ensure stability. The locking screw 32 is installed between the fixing seat 31 and the nut plate 33. By rotating the locking screw 32, its relative position between the fixing seat 31 and the nut plate 33 can be changed, thereby driving the bearing to move up and down. This fine-tuning function ensures... The precise fit between the bearing, the rotating shaft 14, and the front cover 12 ensures both sealing and rotational stability. The nut plate 33 is firmly fixed to the bottom of the front cover 12, providing a stable and reliable support platform for the plug screw 32. This helps maintain the stability of the plug screw 32 during adjustment and prevents it from loosening or deforming due to uneven force. The first fixing ring 34 enhances the connection strength between the fixing seat 31 and the bearing. The connecting rod 36 enhances the connection strength between the second fixing ring 35 and the fixing seat 31. The connecting rod 36 is used for fixed connection and transmits the force of the second fixing ring 35 to the fixing seat 31, thereby dispersing the stress and vibration generated by the bearing during operation. The tight fit between the outer bearing 2 and the pull-out assembly 3 effectively prevents external contaminants from entering the motor and protects the bearing and lubricating oil from damage. The pull-out assembly 3 allows for convenient disassembly and replacement of the outer bearing 2 when needed, reducing maintenance costs and time.

[0022] Specifically, the upper surface of the first fixing ring 34 is threaded with several sets of support rods 341, and the middle part of the connecting rod 36 is inserted and installed at the other end of the support rod 341.

[0023] In this embodiment, the support rod 341 is threaded to the upper surface of the first fixing ring 34. The support rod 341 provides additional support and stability, connecting the first fixing ring 34 to the connecting rod 36 to form a more stable triangular support structure, protecting the bearing and other components of the motor from damage.

[0024] The insertion and installation of the connecting rod 36 and the support rod 341 not only enhances the rigidity and stability of the pull-out assembly 3, but also improves its resistance to vibration and impact. During motor operation, even if it encounters large vibrations or impacts, the pull-out assembly 3 can maintain its stability and reliability.

[0025] Specifically, several sets of second support blocks 351 are threaded around the second fixing ring 35, and first support blocks 311 are threaded at the four corners of the fixing seat 31. One end of the connecting rod 36 is fixedly connected to the first support block 311, and the other end of the connecting rod 36 is fixedly connected to the second support block 351.

[0026] In this embodiment, the second support block 351 is threaded around the second fixing ring 35, which helps to evenly distribute the force borne by the second fixing ring 35 to each support point, thereby improving its overall stability. The first support block 311 is threaded at the four corners of the fixed seat 31, making the support of the fixed seat 31 more balanced and able to effectively resist forces and torques from all directions. The connecting rod 36 forms a stable bridge structure by being fixedly connected to the support blocks at both ends, tightly connecting the second fixing ring 35 and the fixed seat 31 together, which not only enhances the overall strength of the pull-out assembly 3, but also improves its vibration and impact resistance.

[0027] Specifically, a handle nut 321 is fixedly installed on the top of the screw 32.

[0028] In this embodiment, the main function of the handle nut 321 is to provide an easy-to-grip and rotate interface, allowing users to conveniently adjust the height of the screw 32. Compared to directly rotating the screw itself, the design of the handle nut 321 increases the area on which the rotational torque is applied and reduces the force required for rotation, thereby improving the efficiency and comfort of adjustment. By being fixedly installed on the top of the screw 32, the handle nut 321 also plays a certain stabilizing role. During the adjustment process, it can prevent the screw 32 from shifting or loosening due to uneven force, ensuring the accuracy and reliability of the adjustment.

[0029] Specifically, the middle parts of the fixing seat 31, nut plate 33, first fixing ring 34 and second fixing ring 35 are at the same center, and the inner walls of all of them are threaded. The plug screw 32 is threaded inside the fixing seat 31, nut plate 33, first fixing ring 34 and second fixing ring 35.

[0030] In this embodiment, the center of the fixing base 31, the nut plate 33, the first fixing ring 34, and the second fixing ring 35 are located at the same center, ensuring that all components can be precisely aligned during installation, forming a stable and coaxial overall structure. This helps to reduce friction, vibration, and stress concentration caused by component misalignment, thereby extending the service life of the component and improving its performance. The inner walls of these four components are all threaded. In order to connect with the screw 32, the screw 32 is installed inside the fixing base 31, the nut plate 33, the first fixing ring 34, and the second fixing ring 35 through threads. Through the threaded connection, the screw 32 can be firmly fixed inside each component, forming a stable support structure, which helps to reduce component loosening or damage caused by vibration or impact. When it is necessary to disassemble or replace components, the threaded connection design makes the operation simple and quick.

[0031] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A DC motor with a sealed bearing, comprising a motor body (1), the motor body (1) including a housing body (11), a rotor assembly (13) disposed inside the housing body (11), and a rotating shaft (14) connected to the middle of the rotor assembly (13), characterized in that: A front cover (12) is installed at one end of the outer shell body (11). A shell bearing (2) is movably installed in the middle of the front cover (12). The shell bearing (2) is sleeved and installed in the middle of the rotating shaft (14). A limiting groove (121) is symmetrically opened in the middle of the front cover (12). A pull-out assembly (3) is fixedly installed in the cavity of the limiting groove (121). The pull-out assembly (3) is symmetrically installed on both sides of the shell bearing (2). The pull-out assembly (3) includes a fixing seat (31), a plug screw (32), a nut plate (33), and a first fixing ring (34). The first fixing ring (34) is bolted to the top surface of the fixing seat (31), and the second fixing ring (35) is sleeved on the top of the screw (32). A connecting rod (36) is fixedly connected between the second fixing ring (35) and the fixing seat (31).

2. A DC motor with a sealed bearing according to claim 1, characterized in that: The upper surface of the first fixing ring (34) is threaded with several sets of support rods (341), and the middle part of the connecting rod (36) is inserted and installed at the other end of the support rod (341).

3. A DC motor with a sealed bearing according to claim 1, characterized in that: The second fixing ring (35) is threaded around its perimeter with several sets of second support blocks (351), and the four corners of the fixing seat (31) are threaded with first support blocks (311). One end of the connecting rod (36) is fixedly connected to the first support block (311), and one end of the connecting rod (36) is fixedly connected to the second support block (351).

4. A DC motor with a sealed bearing according to claim 1, characterized in that: The top of the screw (32) is fixedly fitted with a handle nut (321).

5. A DC motor with a sealed bearing according to claim 1, characterized in that: The middle parts of the fixed seat (31), nut plate (33), first fixed ring (34) and second fixed ring (35) are at the same center, and the inner walls are all provided with threads. The plug screw (32) is threaded inside the fixed seat (31), nut plate (33), first fixed ring (34) and second fixed ring (35).

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