Motor structure without clamping spring

Abstract

The utility model discloses a motor structure without a clamp spring, which relates to the technical field of motors and comprises a motor shell and a motor shaft, a motor rear cover is fixedly mounted on one side of the motor shell, and a motor front cover is fixedly mounted on the other side of the motor shell. And the motor shaft penetrates through the motor shell and the motor front cover and is rotationally mounted on the motor rear cover and the motor front cover. A shaft connecting rod fixedly connected with the driving part is arranged at the end, close to the motor front cover, of the motor shaft, a plurality of limiting mechanisms are fixedly arranged on the periphery, located on the inner side of the motor shell, of the motor shaft, and a motor rotor is fixedly installed on the periphery, located on the inner side of the motor shell, of the motor shaft. A motor stator matched with the motor rotor is fixedly mounted on the inner wall of the motor shell; according to the utility model, the motor shaft is improved, and the limiting bumps are additionally arranged on the periphery of the motor shaft, so that axial and radial limiting of components is realized.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a motor structure that does not require a retaining spring. Background Technology

[0002] In the field of motor design and manufacturing, the motor shaft, as a crucial component, undertakes the critical tasks of transmitting torque and supporting rotating parts. The structural design of the motor shaft directly affects the overall performance, service life, and installation stability of the motor. However, in existing motor structures, the motor shaft commonly adopts a smooth shaft design, meaning its outer circumferential surface is smooth and featureless. While this design simplifies the shaft's manufacturing process, it has revealed numerous problems in practical applications, adversely affecting the overall performance and service life of the motor.

[0003] Firstly, from the perspective of component installation stability, when mounting rotating components (such as fans, gears, etc.) on a bare shaft motor, the lack of necessary limiting structures makes the components prone to axial and radial slippage on the motor shaft. This slippage not only leads to inaccurate component installation positions but also generates additional vibration and noise during motor operation, and may even cause friction and wear between components, thereby shortening the motor's service life.

[0004] Specifically, in the axial direction, since the smooth motor shaft does not provide any limiting structure, the axial position of the components on the motor shaft is difficult to fix. When the motor starts, stops, or the load changes, the components may slide axially on the motor shaft due to inertia or external forces. This sliding not only causes changes in the fit clearance between components, affecting the transmission efficiency of the motor, but may also cause the components to collide with the motor shaft or other fixed structures, resulting in damage.

[0005] In the radial direction, the smooth motor shaft also lacks the necessary limiting structure to prevent radial movement of components. During motor operation, due to centrifugal force and other external forces acting on the rotating components, the components may experience radial slippage or offset on the motor shaft. This radial slippage or offset not only causes changes in the relative positions between components, affecting the motor's balance and stability, but may also cause friction and wear between the components and the inner wall of the motor shaft or motor housing, generating heat and noise, and even leading to motor failure.

[0006] Furthermore, a significant problem exists in the installation of the bare rod motor shaft during component assembly: the difficulty of installing and disassembling the component. Due to the lack of a limiting structure, the installation and disassembly of the component on the motor shaft often requires specialized tools or equipment, which not only increases the complexity and time cost of the operation but may also cause damage to the component and the motor shaft.

[0007] To address the aforementioned issues and improve the installation stability of components on the motor shaft, researchers have been exploring new motor shaft structural designs. One traditional solution is to use fasteners such as snap rings to secure the components to the motor shaft. However, while this method improves installation stability to some extent, it also has some drawbacks. For example, installing and removing snap rings requires additional steps and tools, increasing operational complexity and time costs; furthermore, snap rings are susceptible to loosening or detachment due to vibration and impact during use, thus affecting the installation stability of the components. Utility Model Content

[0008] The purpose of this invention is to provide a motor structure that does not require a retaining ring, thereby solving the technical problem of inaccurate component installation position caused by the motor shaft of a bare rod structure.

[0009] The objective of this utility model can be achieved through the following technical solutions:

[0010] A motor structure that does not require retaining rings includes a motor housing and a motor shaft. A rear cover is fixedly mounted on one side of the motor housing, and a front cover is fixedly mounted on the other side of the motor housing. The motor shaft passes through the motor housing and the front cover and is rotatably mounted on the rear and front covers. A shaft connecting rod, fixedly connected to a drive component, is provided at one end of the motor shaft near the front cover. Several limiting mechanisms are fixedly provided on the outer periphery of the motor shaft inside the motor housing. A motor rotor is fixedly mounted on the outer periphery of the motor shaft inside the motor housing. A motor stator, which mates with the motor rotor, is fixedly mounted on the inner wall of the motor housing.

[0011] Preferably, the limiting mechanism consists of limiting protrusions arranged in a ring array on the outer periphery of the inner side of the motor housing along the motor shaft.

[0012] Preferably, the limiting protrusion is a triangular protrusion structure.

[0013] Preferably, the limiting protrusion is a rectangular protrusion structure.

[0014] Preferably, limit end plates are provided on both sides of the motor rotor, and end plate sleeves are fixedly provided on the limit end plates, and the end plate sleeves are sleeved on the outer periphery of the motor shaft.

[0015] Preferably, the end of the motor shaft near the motor rear cover is rotatably connected to the motor rear cover via a rear cover bearing, and a bearing bushing for protecting the rear cover bearing is provided between the motor rear cover and the rear cover bearing.

[0016] Preferably, the side of the motor shaft closest to the front cover of the motor is rotatably connected to the front cover of the motor via a front cover bearing.

[0017] Preferably, a bearing retainer ring is fixedly provided on the side of the front cover bearing away from the motor housing, and the bearing retainer ring is fixedly installed on the front cover of the motor by a plurality of self-tapping screws.

[0018] Preferably, a commutator is fixedly installed on the outer periphery of the motor shaft near the rear cover of the motor.

[0019] Preferably, the motor rotor, end plate sleeve, and commutator inner side are all provided with limiting grooves that cooperate with the limiting protrusions.

[0020] The beneficial effects of this invention are as follows: By improving the motor shaft and adding a limiting protrusion to its outer circumference, axial and radial positioning of the component is achieved. The design of the limiting protrusion fully considers the installation stability and ease of disassembly of the component on the motor shaft. In the axial direction, the limiting protrusion prevents the component from sliding axially on the motor shaft, ensuring the accurate position of the component on the motor shaft; in the radial direction, the limiting protrusion restricts the radial movement range of the component on the motor shaft, preventing the component from shifting or vibrating during motor operation. Furthermore, since the limiting protrusion is directly integrated into the motor shaft, the installation and disassembly of the component can be achieved without additional fasteners or tools, thereby simplifying the operation process and reducing costs. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of a motor structure that does not require a retaining ring according to the present invention;

[0023] Figure 2 This is a schematic diagram of the overall structure of a motor structure that does not require a retaining ring according to the present invention;

[0024] Figure 3 This is a three-dimensional structural diagram of a motor structure that does not require a retaining spring according to the present invention;

[0025] Figure 4 This is a schematic diagram of the main structure of a motor structure that does not require a retaining ring according to the present invention;

[0026] Figure 5 This is a utility model Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0027] Figure 6 This is a schematic diagram of the internal structure of a motor housing according to the present invention, which is a motor structure that does not require a retaining spring.

[0028] In the diagram: 1. Motor housing; 2. Motor rear cover; 3. Motor front cover; 4. Motor shaft; 41. Limiting protrusion; 42. Shaft connecting rod; 5. Motor stator; 6. Motor rotor; 7. Limiting end plate; 8. End plate sleeve; 9. Commutator; 10. Rear cover bearing; 11. Bearing bushing; 12. Front cover bearing; 13. Bearing retaining ring; 14. Self-tapping screw. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Please see Figures 1-6As shown, this utility model is a motor structure that does not require a retaining spring, including a motor housing 1 and a motor shaft 4. A rear cover 2 is fixedly installed on one side of the motor housing 1, and a front cover 3 is fixedly installed on the other side of the motor housing 1. The motor shaft 4 passes through the motor housing 1 and the front cover 3 and is rotatably mounted on the rear cover 2 and the front cover 3. A shaft connecting rod 42, which is fixedly connected to a drive component, is provided at one end of the motor shaft 4 near the front cover 3. Several limiting mechanisms are fixedly provided on the outer periphery of the inner side of the motor shaft 4 within the motor housing 1. A motor rotor 6 is fixedly installed on the outer periphery of the inner side of the motor shaft 4 within the motor housing 1. A motor stator 5, which cooperates with the motor rotor 6, is fixedly installed on the inner wall of the motor housing 1.

[0033] In an optional embodiment, the limiting mechanism is a limiting protrusion 41 arranged in a ring array on the outer periphery of the inner side of the motor housing 1 on the motor shaft 4.

[0034] It should be noted that the design of the limiting protrusion 41 enables axial and radial limiting of the installed component, thereby improving installation stability.

[0035] In an optional embodiment, the limiting protrusion 41 is a triangular protrusion structure.

[0036] It should be noted that the triangular protrusion structure increases the contact area between the limiting protrusion and the limiting groove, thereby improving the stability and reliability of the limiting.

[0037] In an optional embodiment, the limiting protrusion 41 is a rectangular protrusion structure.

[0038] It should be noted that the rectangular protrusion structure also effectively limits the positioning of the installed components, and the processing is relatively simple.

[0039] In an optional embodiment, limiting end plates 7 are provided on both sides of the motor rotor 6, and end plate sleeves 8 are fixedly provided on the limiting end plates 7, and the end plate sleeves 8 are sleeved on the outer periphery of the motor shaft 4.

[0040] It should be noted that the design of the limiting end plate 7 and the end plate sleeve 8 further enhances the installation stability of the motor rotor 6 on the motor shaft 4.

[0041] In an optional embodiment, the end of the motor shaft 4 near the motor rear cover 2 is rotatably connected to the motor rear cover 2 via a rear cover bearing 10, and a bearing bushing 11 for protecting the rear cover bearing 10 is provided between the motor rear cover 2 and the rear cover bearing 10.

[0042] It should be noted that the rear cover bearing 10 enables the rotational connection between the motor shaft 4 and the motor rear cover 2, while the bearing bushing 11 serves to protect the rear cover bearing 10.

[0043] In an optional embodiment, the side of the motor shaft 4 closest to the motor front cover 3 is rotatably connected to the motor front cover 3 via a front cover bearing 12.

[0044] It should be noted that the front cover bearing 12 enables the rotational connection between the motor shaft 4 and the motor front cover 3.

[0045] In an optional embodiment, a bearing retainer 13 is fixedly provided on the side of the front cover bearing 12 away from the motor housing 1, and the bearing retainer 13 is fixedly installed on the motor front cover 3 by a plurality of self-tapping screws 14.

[0046] It should be noted that the design of the bearing retaining ring 13 and the self-tapping screw 14 enhances the installation stability of the front cover bearing 12 on the motor front cover 3.

[0047] In an optional embodiment, a commutator 9 is fixedly installed on the outer periphery of the motor shaft 4 near the side of the motor rear cover 2.

[0048] It should be noted that the commutator 9 is used for the commutation control of the motor and is fixedly installed on the motor shaft 4 to ensure its operational stability.

[0049] In an optional embodiment, the inner sides of the motor rotor 6, the end plate sleeve 8, and the commutator 9 are all provided with limiting grooves that cooperate with the limiting protrusions 41.

[0050] It should be noted that the cooperation between the limiting groove and the limiting protrusion 41 effectively limits the motor rotor 6, the end plate sleeve 8 and the commutator 9, thereby improving the overall stability of the motor structure.

[0051] The working principle of this utility model is as follows: A motor stator 5 and a motor rotor 6 are installed inside the motor housing 1. The motor shaft 4 passes through the motor housing 1 and the rear cover 2 and front cover 3 at both ends of the motor shaft 4 and is rotatably mounted. A shaft connecting rod 42 is provided at one end of the motor shaft 4 near the front cover 3 for fixed connection with the drive components. Several limiting protrusions 41 are provided on the outer periphery of the motor shaft 4. These limiting protrusions cooperate with the limiting grooves on the inner side of the motor rotor 6, the end plate sleeve 8, and the commutator 9 to limit the movement of these components. At the same time, the motor shaft 4 is rotatably connected to the rear cover 2 and the front cover 3 of the motor through the rear cover bearing 10 and the front cover bearing 12, respectively. A bearing retaining ring 13 is also provided on one side of the front cover bearing 12, which is fixed to the front cover 3 of the motor by self-tapping screws 14, further enhancing the installation stability of the motor shaft.

[0052] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An electric motor structure which does not require a spring clip, characterized by, The utility model provides an electric machine, including motor shell (1) and motor shaft (4), one side of motor shell (1) is fixedly installed with motor rear cover (2), the other side of motor shell (1) is fixedly installed with motor front cover (3), motor shaft (4) penetrates motor shell (1) and motor front cover (3) and is rotatably installed on motor rear cover (2) and motor front cover (3), the one end of motor shaft (4) is close to motor front cover (3) and is provided with the shaft connecting rod (42) of fixed connection with drive part, the outer periphery of motor shaft (4) is fixedly provided with a plurality of limiting mechanisms in motor shell (1) inside, the outer periphery of motor shaft (4) is fixedly installed with motor rotor (6) in motor shell (1) inside, the inner wall of motor shell (1) is fixedly installed with motor stator (5) with motor rotor (6) cooperation.

2. The motor structure without spring clip according to claim 1, characterized in that, The limiting mechanism is a limiting protrusion (41) arranged in an annular array on the outer periphery of the motor shaft (4) inside the motor shell (1).

3. The motor structure without spring clip according to claim 2, characterized in that, The limiting protrusion (41) is a triangular protruding structure.

4. The motor structure without spring clips according to claim 2, wherein The limiting protrusion (41) is a rectangular protruding structure.

5. The springless motor construction of claim 2 wherein, Both sides of the motor rotor (6) are provided with a limiting end plate (7), the limiting end plate (7) is fixedly provided with an end plate sleeve (8), and the end plate sleeve (8) is sleeved on the outer periphery of the motor shaft (4).

6. The springless motor construction of claim 1 wherein, The one end of the motor shaft (4) close to the motor rear cover (2) is rotatably connected with the motor rear cover (2) through a rear cover bearing (10), and the motor rear cover (2) and the rear cover bearing (10) are provided with a bearing bushing (11) for protecting the rear cover bearing (10).

7. The springless motor construction of claim 1 wherein, The one side of the motor shaft (4) close to the motor front cover (3) is rotatably connected with the motor front cover (3) through a front cover bearing (12).

8. The motor structure without spring clip according to claim 7, wherein The side of the front cover bearing (12) away from the motor shell (1) is fixedly provided with a bearing retainer (13), and the bearing retainer (13) is fixedly installed on the motor front cover (3) through a plurality of self-tapping screws (14).

9. The motor structure without spring clips according to claim 5, wherein The outer periphery of the motor shaft (4) close to the motor rear cover (2) is fixedly installed with a commutator (9).

10. The motor structure without spring clip according to claim 9, wherein The inner side of the motor rotor (6), the end plate sleeve (8) and the commutator (9) are provided with a limiting groove matched with the limiting protrusion (41).

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