A motor structure with a turbine shaft installation

Abstract

The utility model discloses a kind of motor structure with turbine shaft installation is convenient, including main body, avoidance groove and worm, the main body pivotally installs shaft body, the shaft body is equipped with rotor, the main body inner cavity is equipped with the stator matched with rotor;The part of shaft body that projects main body is inserted segment, the avoidance groove is located inserted segment, the avoidance groove is recessed structure, the middle part of worm is equipped with shaft hole, the inserted segment is pressed into the shaft hole and interference fit in the position of avoidance groove, and avoidance groove is locally deformed under interference pressure.By changing the shape of the shaft body insertion segment, by setting the avoidance groove of the recessed shaft body, the depth of the shaft body inserted into the shaft hole can be further improved, thereby satisfying the degree of combination between the two, while the pressure-in pressure can be reduced while ensuring the stability of the combination. The inserted segment with the avoidance groove deformation can ensure the stability of the pressure-in while reducing the deformation of the worm when using a pressure of 11 kg.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, and in particular to an electric motor structure that facilitates the installation of a turbine shaft. Background Technology

[0002] A brushed motor is a rotating electric motor that converts electrical energy into mechanical energy (electric motor) or mechanical energy into electrical energy (generator) by containing brushes. Brushed motors are the foundation of all motors, characterized by fast starting, timely braking, smooth speed adjustment over a wide range, and relatively simple control circuitry.

[0003] In order to achieve the predetermined torque, the existing motor shaft is generally pressed directly into the shaft hole of the worm gear, which facilitates the driving of other transmission mechanisms and is a relatively important part of the conversion of electrical energy into mechanical energy.

[0004] However, in actual production, if the pressing force of the shaft hole for pressing into the worm gear is not properly controlled, it will cause the shaft to bend and affect the motor performance. Utility Model Content

[0005] The main purpose of this utility model is to propose a motor structure that facilitates the installation of the worm gear shaft. The aim is to improve the shape of the shaft so that it can fit with the worm gear, satisfying the pressing force and torque without bending the motor shaft, while also preventing the worm gear from falling off, thereby improving the stability and service life of the motor.

[0006] To achieve the above objectives, this utility model proposes a motor structure that facilitates turbine shaft installation.

[0007] include:

[0008] The main body is pivotally mounted with a shaft, the shaft is provided with a rotor, and the inner cavity of the main body is provided with a stator that cooperates with the rotor;

[0009] The portion of the shaft extending out of the main body is a plug-in section;

[0010] A clearance groove is provided in the insertion section, and the clearance groove is a recessed structure;

[0011] The worm gear has a shaft hole in its middle section. The insertion section is pressed into the shaft hole at the position of the relief groove and is interference-fitted. The relief groove undergoes local deformation under interference pressure.

[0012] The insertion section includes a guide end and a clearance groove located above the guide end.

[0013] Preferably, the clearance grooves are distributed circumferentially, spaced apart, or partially distributed along the outer wall of the insertion section.

[0014] Preferably, the guide end has a rounded chamfer.

[0015] Preferably, the clearance groove extends from the end of the plug section toward the main body, and the height of the clearance groove is less than one-third of the height of the plug section.

[0016] Preferably, the clearance grooves are symmetrically distributed along the outer wall of the insertion section or recessed from one side.

[0017] Preferably, the size of the shaft hole is

[0018] The dimensions of the shaft are: Up to +0.005mm;

[0019] The range of X is 0.8mm to 2.5mm.

[0020] Preferably, the minimum interference fit between the shaft hole and the shaft body is 0.002mm-0.005mm;

[0021] The maximum interference fit between the shaft hole and the shaft body is 0.015 mm.

[0022] The length of the shaft extending into the shaft hole is less than or equal to the length of the worm.

[0023] Preferably, the pressure of the shaft extending into the shaft hole is 9 kg to 15 kg.

[0024] Preferably, the clearance groove includes a radial depth and an axial height.

[0025] In actual design, in order to ensure the stability of the connection between the two, a chamfer is usually set at the end of the plug section to facilitate pressing. However, for long shaft structures, the depth of the plug section and the shaft hole need to be similar. Therefore, when pressing into the rear of the plug section, the rear part is difficult to extend into the shaft hole due to the interference fit deformation, which causes bending.

[0026] Therefore, by changing the shape of the shaft insertion section and setting a recessed clearance groove in the shaft, the depth of the shaft extending into the shaft hole can be further increased, thereby satisfying the fit between the two, while reducing the pressing pressure and ensuring the stability of the fit.

[0027] The existing plug section requires 40 kg of pressure to reach the predetermined depth when it is fitted with the shaft hole. However, the plug section with the avoidance groove deformation can ensure the stability of the pressing when using 11 kg of pressure, while also reducing the deformation of the worm and improving the structural stability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the first embodiment;

[0029] Figure 2This is a schematic diagram of the shaft clearance groove in the first embodiment;

[0030] Figure 3 This is a schematic diagram of the second embodiment;

[0031] Figure 4 This is a schematic diagram of the third embodiment;

[0032] Figure 5 This is a three-dimensional schematic diagram of the present invention.

[0033] In the picture,

[0034] 1 is the main body, 10 is the shaft, and 11 is the connector section.

[0035] 2 is the clearance groove, 20 is the guide end, and 21 is the rounded chamfer.

[0036] 3 represents the worm gear, and 30 represents the shaft hole. Detailed Implementation

[0037] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0038] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0040] like Figures 1 to 5 As shown, a motor structure with a convenient turbine shaft mounting includes:

[0041] The main body 1 is pivotally mounted with a shaft 10, the shaft 10 is provided with a rotor, and the inner cavity of the main body 1 is provided with a stator that cooperates with the rotor;

[0042] The portion of the shaft 10 extending out of the main body 1 is the plug-in section 11;

[0043] The clearance groove 2 is provided in the insertion section 11, and the clearance groove 2 is a recessed structure;

[0044] The worm 3 has a shaft hole 30 in the middle. The insertion section 11 is pressed into the shaft hole 30 at the position of the relief groove 2 and is interference-fitted. The relief groove 2 is locally deformed under interference pressure.

[0045] In actual design, in order to ensure the stability of the connection between the two, a chamfer is usually set at the end of the plug section 11 to facilitate pressing. However, for long shaft structure, the depth of the plug section 11 and the shaft hole 30 need to be similar. Therefore, when pressing into the rear part of the plug section 11, the rear part is difficult to extend into the shaft hole 30 due to interference fit deformation, which causes bending.

[0046] Therefore, by changing the shape of the insertion section 11 of the shaft 10 and by setting a recessed relief groove 2 into the shaft 10, the depth of the shaft 10 extending into the shaft hole 30 can be further increased, thereby satisfying the degree of engagement between the two, while reducing the pressing pressure and ensuring the stability of the engagement.

[0047] The existing insertion section 11 requires 40 kg of pressure to reach the predetermined depth when it is fitted with the shaft hole 30. However, the insertion section 11 with the deformation of the relief groove 2 can ensure the stability of the pressing when using 11 kg of pressure, while also reducing the deformation of the worm 3 and improving the structural stability.

[0048] Specifically, the insertion section 11 includes a guide end 20 and a clearance groove 2 located above the guide end 20.

[0049] In this embodiment of the utility model, the clearance groove 2 is distributed circumferentially, intermittently, or partially along the outer wall of the insertion section 11. In this structure, the setting of the guide end 20 can make the overall force more uniform. The other clearance groove 2 can be set circumferentially, intermittently, or partially according to the length and hardness of the material, thereby improving the bonding stability while facilitating pressing.

[0050] Specifically, the guide end 20 is provided with a rounded chamfer 21, and adopts a specific chamfer or guide structure, which makes the assembly smoother and is suitable for automated assembly in mass production, thereby improving production efficiency.

[0051] In this embodiment of the invention, the clearance groove 2 extends from the end of the insertion section 11 toward the main body 1, and the height of the clearance groove 2 is less than one-third of the height of the insertion section 11. This appropriate height ensures the insertion of the shaft 10 while preventing a decrease in connection stability due to excessive length of the clearance groove 2, thus improving operational stability.

[0052] Specifically, the clearance grooves 2 are symmetrically distributed along the outer wall of the insertion section 11 or recessed from one side, thereby meeting different installation requirements.

[0053] The size of the shaft hole is

[0054] The dimensions of the shaft are: Up to +0.005mm;

[0055] The range of X is 0.8mm to 2.5mm.

[0056] In a specific embodiment of this utility model, the inner diameter of the shaft hole 30 is

[0057] The inner diameter of the shaft hole 30 is

[0058] The dimensions of the worm gear are: (1.490mm to 1.495mm);

[0059] The dimensions of the shaft are: (1.500mm to 1.505mm);

[0060] By using a predetermined interference difference, mutual locking is achieved, and the shaft 10 can be fully inserted and engaged.

[0061] Specifically, the minimum interference fit between the shaft hole 30 and the shaft body 10 is: minimum interference fit: 1.500mm (minimum outer diameter of the shaft) - 1.495mm (maximum inner diameter of the worm) = 0.005mm;

[0062] Maximum interference: 1.505mm (maximum outer diameter of shaft) - 1.490mm (minimum inner diameter of worm) = 0.015mm; the length of the shaft 10 extending into the shaft hole 30 is less than or equal to the length of the worm 3.

[0063] In this embodiment of the invention, the pressure of the shaft 10 extending into the shaft hole 30 is 9kg-15kg, and in the first embodiment, the pressing pressure is 11kg.

[0064] In the first embodiment,

[0065] Features: Compared to conventional press-fitting, the first embodiment adds a relief groove 2 with a groove or toothed structure (and is chamfered), which makes the shaft 10 and the shaft hole 30 have better engagement during press-fitting.

[0066] Advantages: Improved torsional resistance: The structure of the first embodiment allows the shaft 10 and shaft hole 30 to transmit torque not only through friction but also potentially through a "mechanical meshing" effect. This design improves torque transmission efficiency and reduces the risk of slippage, making it particularly suitable for high-torque transmission scenarios, such as high-load worm gear mechanisms. Reduced stress concentration and improved fatigue life: Due to the optimization of the meshing surface, the first embodiment effectively reduces stress concentration areas, thereby improving overall durability and reducing loosening or deformation problems after prolonged use.

[0067] In the second embodiment, the geometry of the mating surface is further optimized to make it more conducive to force distribution;

[0068] Advantages: Further reduces axial slippage of the shaft, improving joint stability; more uniform stress distribution, reducing stress concentration, and improving durability.

[0069] In the third embodiment,

[0070] Features: It combines the advantages of the previous designs and adds additional structural optimizations (such as steps or guide structures).

[0071] Advantages: Optimal force distribution, improving impact resistance; may further reduce errors during assembly and improve positioning accuracy.

[0072] In the first embodiment, due to the optimized shape of the mating surface, the shaft is easier to align with the center during assembly, reducing installation errors and improving assembly accuracy; this is crucial for high-precision transmission systems, as it can reduce vibration problems caused by eccentricity.

[0073] The clearance groove includes radial depth and axial height, thereby achieving different fitting accuracy with the shaft hole.

[0074] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A motor structure with a design that facilitates turbine shaft mounting, characterized in that, include: The main body is pivotally mounted with a shaft, the shaft is provided with a rotor, and the inner cavity of the main body is provided with a stator that cooperates with the rotor; The portion of the shaft extending out of the main body is a plug-in section; A clearance groove is provided in the insertion section, and the clearance groove is a recessed structure; The worm gear has a shaft hole in its middle section. The insertion section is pressed into the shaft hole at the position of the relief groove and is interference-fitted. The relief groove undergoes local deformation under interference pressure.

2. The motor structure with convenient turbine shaft installation as described in claim 1, characterized in that: The insertion section includes a guide end and a clearance groove located above the guide end.

3. The motor structure with convenient turbine shaft installation as described in claim 2, characterized in that: The clearance grooves are distributed circumferentially, intermittently, or partially along the outer wall of the insertion section.

4. The motor structure with convenient turbine shaft installation as described in claim 2, characterized in that: The guide end is provided with a rounded chamfer.

5. The motor structure as described in claim 1, characterized in that: The clearance groove extends from the end of the plug section toward the main body, and the height of the clearance groove is less than one-third of the height of the plug section.

6. The motor structure as described in claim 1, characterized in that: The clearance grooves are symmetrically distributed along the outer wall of the insertion section or recessed from one side.

7. The motor structure as described in claim 1, characterized in that: The size of the shaft hole is -0.01 / -0.02mm; The dimensions of the shaft are: -0.008mm to +0.005mm; The range of X is 0.8mm to 2.5mm.

8. The motor structure with convenient turbine shaft installation as described in claim 7, characterized in that: The minimum interference fit between the shaft hole and the shaft body is 0.002mm-0.005mm; The maximum interference fit between the shaft hole and the shaft body is 0.015 mm. The length of the shaft extending into the shaft hole is less than or equal to the length of the worm.

9. The motor structure with convenient turbine shaft mounting as described in claim 7, characterized in that: The pressure of the shaft extending into the shaft hole is 9kg-15kg.

10. The motor structure as described in claim 1, characterized in that: The clearance groove includes a radial depth and an axial height.

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