Stepping motor rotating shaft mounting structure

Abstract

The utility model discloses a stepping motor rotating shaft mounting structure, which relates to the technical field of stepping motors, and comprises a stepping motor rotating shaft and a gear mounted at the upper part of the stepping motor rotating shaft, the top end of the stepping motor rotating shaft is connected with the gear and a shaft sleeve in a clamping manner through a conical column, and the stepping motor rotating shaft is radially fixed through the clamping of a step bulge and a step groove. According to the stepping motor rotating shaft installation structure, through clamping connection of the conical column and the conical hole and radial constraint of the step protrusion and the step groove, high-precision and gapless fixation of the gear and the shaft sleeve is achieved, and therefore the precision and stability of stepping motor transmission are remarkably improved, and it is ensured that excellent transmission performance can be kept under various working conditions.

Description

Technical Field

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

[0002] In the existing structure of stepper motors, the mounting structure of the shaft and gears is crucial to the motor's performance and stability. Traditional stepper motor shaft mounting structures often employ simple shaft-hole fits or threaded connections. While these methods can meet transmission requirements to some extent, they have many shortcomings. For example, shaft-hole fits may cause gear wobble during rotation due to excessive clearance, affecting transmission accuracy and stability; while threaded connections may fail due to thread wear or loosening. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a stepper motor shaft mounting structure, which solves the problems mentioned in the background.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a stepper motor shaft mounting structure, including a stepper motor shaft and a gear mounted on the upper part of the stepper motor shaft, wherein the top end of the stepper motor shaft is engaged with the gear and the bushing through a tapered column, and radial fixation is achieved through the engagement of stepped protrusions and stepped grooves.

[0005] Furthermore, the outer engaging sleeve of the tapered column is provided with a gear and a bushing, and the gear and bushing are provided with a tapered hole that matches the tapered column.

[0006] Furthermore, the top of the tapered column is connected to a shaft head, and a pressure plate that deforms under pressure is provided on the outside of the shaft head.

[0007] Furthermore, a recessed groove is provided on the top of the gear, and a fixing plate is provided inside the recessed groove. After the pressure plate is deformed by pressure, it is pressed against the upper part of the fixing plate.

[0008] Furthermore, a through hole is provided in the middle of the fixing plate, through which the shaft head is inserted into the interior of the fixing plate and extends to the top of the fixing plate.

[0009] Furthermore, the stepped protrusion is provided at the connection between the stepper motor shaft and the tapered column, and the stepped groove is provided at the bottom of the bushing to engage with the stepped protrusion to achieve further radial constraint.

[0010] This utility model provides a stepper motor shaft mounting structure. Compared with the prior art, it has the following advantages:

[0011] This stepper motor shaft mounting structure achieves high-precision, backlash-free fixing of gears and bushings through the interlocking connection of tapered columns and tapered holes, as well as the radial constraint of stepped protrusions and stepped grooves. This significantly improves the accuracy and stability of the stepper motor transmission, ensuring excellent transmission performance under various working conditions. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the stepper motor shaft in this utility model;

[0014] Figure 3 This is a schematic diagram of the gear structure in this utility model;

[0015] Figure 4 This is a half-sectional view of the gear in this utility model;

[0016] Figure 5 This is a schematic diagram of the assembly structure of this utility model;

[0017] Figure 6 This is a half-sectional view of the assembled version of this utility model.

[0018] In the diagram: 1. Stepper motor shaft; 11. Tapered column; 12. Stepped protrusion; 13. Shaft head; 14. Pressure plate; 2. Gear; 21. Bushing; 22. Tapered hole; 23. Stepped groove; 24. Sinking groove; 3. Fixing plate; 31. Through hole. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-6This utility model provides a technical solution: a stepper motor shaft mounting structure, aiming to provide a stepper motor shaft mounting solution that is structurally stable, easy to install, and effectively prevents gear loosening. It includes a stepper motor shaft 1 and a gear 2 mounted on the upper part of the stepper motor shaft 1. The stepper motor shaft 1 serves as a driving component, responsible for transmitting the rotational power of the motor. The gear 2 is used to cooperate with other transmission components to realize the transmission and conversion of power. The top of the stepper motor shaft 1 is designed with a tapered column 11, the external shape of which matches the tapered hole 22 shared by the gear 2 and the bushing 21. This tapered engagement connection method not only facilitates installation but also provides stable support and transmission during rotation.

[0021] To further enhance the stability of the connection, a stepped protrusion 12 is provided at the connection between the stepper motor shaft 1 and the tapered column 11, and a stepped groove 23 matching the stepped protrusion 12 is provided at the bottom of the bushing 21. When the gear 2 and the bushing 21 are fitted onto the tapered column 11, the stepped protrusion 12 and the stepped groove 23 will engage with each other, thereby achieving radial fixation. This design can effectively prevent the gear 2 from loosening or shifting during rotation. In addition, a shaft head 13 is connected to the top of the tapered column 11, and a pressure plate 14 that deforms under pressure is provided on the outside of the shaft head 13 (during the manufacturing process, a cold heading process is used to flatten the pressure plate 14, and the flattened pressure plate 14 will press against the upper part of the fixing plate 3 to form a fixation). The function of the pressure plate 14 is to apply additional pressure to the gear 2 and the bushing 21 during installation to ensure a tight fit between them and the tapered column 11. Meanwhile, the deformation of the pressure plate 14 can also absorb a certain amount of vibration and impact, improving the stability and durability of the entire installation structure;

[0022] To further enhance the fixing effect, a recessed groove 24 is opened at the top of the gear 2, and a fixing plate 3 is set inside the recessed groove 24. A through hole 31 is reserved in the middle of the fixing plate 3, through which the shaft head 13 is inserted into the interior of the fixing plate 3 and extends to the top of the fixing plate 3. When the pressure plate 14 is deformed under pressure, it will press against the upper part of the fixing plate 3, thereby further constraining and fixing the gear 2 and the bushing 21 as a whole. This design not only improves the stability of the installation, but also effectively prevents the gear 2 from loosening due to vibration or impact during long-term use.

[0023] In summary, this stepper motor shaft mounting structure effectively secures and supports the gears and bushings through a tapered snap-fit ​​connection, radial constraint from stepped protrusions and grooves, and dual fixing via a pressure plate and a fixing piece. This structure is not only easy to install and reliably stable, but also effectively prevents gear loosening and misalignment, improving the stability and durability of the entire transmission system.

Claims

1. A stepper motor shaft mounting structure, comprising a stepper motor shaft (1) and a gear (2) mounted on the upper part of the stepper motor shaft (1), characterized in that, The top end of the stepper motor shaft (1) is engaged with the gear (2) and the bushing (21) through a tapered column (11), and is radially fixed by engaging the stepped protrusion (12) and the stepped groove (23).

2. The stepper motor shaft mounting structure according to claim 1, characterized in that, The tapered column (11) is externally fitted with a gear (2) and a bushing (21), and the gear (2) and the bushing (21) are internally provided with a tapered hole (22) that matches the tapered column (11).

3. The stepper motor shaft mounting structure according to claim 1, characterized in that, The top of the tapered column (11) is connected to a shaft head (13), and a pressure plate (14) that will deform under pressure is provided on the outside of the shaft head (13).

4. The stepper motor shaft mounting structure according to claim 3, characterized in that, The gear (2) has a recessed groove (24) at the top, and a fixing plate (3) is provided inside the recessed groove (24). The pressure plate (14) is pressed onto the upper part of the fixing plate (3) after being deformed by pressure.

5. The stepper motor shaft mounting structure according to claim 4, characterized in that, A through hole (31) is provided in the middle of the fixing plate (3), and the shaft head (13) is inserted through the through hole (31) into the interior of the fixing plate (3) and extends to the top of the fixing plate (3).

6. The stepper motor shaft mounting structure according to any one of claims 1 to 5, characterized in that, The stepped protrusion (12) is located at the connection between the stepper motor shaft (1) and the tapered column (11), and the stepped groove (23) is located at the bottom of the bushing (21) to engage with the stepped protrusion (12) to achieve further radial constraint.

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