Gear shaft for three-in-one motor

Abstract

The gear shaft comprises a first bearing, a first gear, a second bearing and a second gear from top to bottom, the first bearing, the first gear, the second bearing and the second gear are connected through a shaft, the diameter of the first gear is smaller than that of the second gear, the gear shaft further comprises a supporting protection shell, the supporting protection shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are integrally formed. The upper part of the upper shell and the upper part of the lower shell are respectively provided with a circular cavity with the same size; the diameter of the circular cavity is the same as that of the first gear; supporting holes with the same diameter as the first bearing, the second gear and the second bearing are formed in the centers of the two circular cavities. According to the utility model, the support protection shell is assembled outside the gear shaft to fix the position of the gear shaft, so that the gear shaft is prevented from generating displacement due to vibration of the motor to influence the rotation precision of the motor, noise can be isolated, and other impurities are prevented from entering the motor to influence the operation of the motor.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, specifically a gear shaft for use in a three-in-one motor. Background Technology

[0002] A three-in-one motor typically refers to a device that integrates the motor, reducer, and encoder, or the motor, reducer, and driver, all together. This integrated design reduces the complexity of the mechanical structure, improves system stability and reliability, and reduces space occupation and cost. The gear shaft, as part of the motor's output shaft, structurally provides stable guidance for the motor's rotation, ensuring its rotational accuracy. However, under prolonged operation, motor vibration may cause displacement of the gear shaft, affecting the motor's rotational accuracy, generating noise, and allowing impurities to enter the motor, thus impacting its operation. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a gear shaft for use in a three-in-one motor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a gear shaft for a three-in-one motor, comprising a gear shaft and a supporting protective shell, wherein the gear shaft comprises, from top to bottom, a first bearing, a first gear, a second bearing, and a second gear, connected by a shaft in the middle; the supporting protective shell comprises an upper shell and a lower shell, both integrally formed; a first circular hole is provided at the center of a second circular cavity inside the lower shell; a circular slot is provided at the center of the first circular cavity inside the upper shell; the diameters of the first circular hole, the first bearing 201, the second bearing, the second gear, and the circular slot are all the same.

[0005] Preferably, the upper shell and the lower shell are respectively provided with a first circular cavity and a second circular cavity of the same size; the inner diameter of the first circular cavity and the second circular cavity is the same as the diameter of the second gear.

[0006] Preferably, a second circular hole is provided at the lower end of the first circular cavity inside the upper shell, half of the second circular hole is higher than the inner wall of the first circular cavity, and the diameter of the second circular hole matches the motor shaft head.

[0007] Preferably, the lower end of the outer surface of the upper shell is provided with a slot 105 that matches the motor end cover.

[0008] Preferably, the upper shell has four first fixing holes of the same size at its four corners, and the lower shell has four second fixing holes of the same size at its four corners, with the positions of the first fixing holes and the second fixing holes matching.

[0009] Preferably, the first gear is a helical gear with a circular arc tooth profile.

[0010] Preferably, the second gear is a spur gear with a circular arc tooth profile.

[0011] Preferably, the diameter of the first gear is smaller than that of the second gear, and the height is smaller than that of the second gear.

[0012] Preferably, the surfaces of the upper and lower shells are coated with sound-absorbing paint.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention utilizes a support and protective shell mounted on the outside of the gear shaft. Firstly, the circular groove, the first circular hole, the first bearing, the second bearing, and the second gear within the protective shell all have the same diameter, allowing the gear shaft to fit perfectly within the protective shell. The circular groove and the first circular hole form two support points, providing a relatively stable support structure that supports the gear shaft, maintaining its balance and preventing it from tipping over. Secondly, the entire protective shell is coated with sound-absorbing paint, improving sound absorption performance and reducing noise. Thirdly, the protective shell provides a physical barrier, directly preventing external impurities such as dust, moisture, and particles from entering the internal equipment or components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the gear shaft structure according to the first embodiment of the present invention.

[0017] Figure 3 This is a side view of the gear shaft according to the first embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal structure of the upper shell according to the first embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the external structure of the upper shell according to the first embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the internal structure of the upper shell according to the first embodiment of the present invention.

[0021] Figure 7 This is a schematic diagram of the external structure of the lower shell according to the first embodiment of the present invention.

[0022] Labeling explanations: 100—Upper shell; 101—First circular cavity; 102—Circular slot; 103—Second circular hole; 104—First fixing hole; 200—Gear shaft; 201—First bearing; 202—First gear; 203—Second bearing; 204—Second gear; 205—Shaft; 300—Lower shell; 301—Second circular cavity; 302—First circular hole; 303—Second fixing hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0024] Please refer to the reference. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 This utility model provides a gear shaft for a three-in-one motor, including a gear shaft 200 and a supporting protective shell. The gear shaft 200 includes a first bearing 201, a first gear 202, a second bearing 203, and a second gear 204 from top to bottom, connected by a shaft 205. The supporting protective shell includes an upper shell 100 and a lower shell 300, both integrally formed. A first circular hole 302 is provided at the center of a second circular cavity 301 inside the lower shell 300. A circular groove 102 is provided at the center of the first circular cavity 101 inside the upper shell 100. The diameters of the first circular hole 302, the first bearing 201, the second bearing 203, the second gear 204, and the circular groove 102 are all the same. Because the first gear 202 and the second gear 204 are of different sizes, the gear shaft is top-heavy and bottom-light. At this time, the second gear 204 passes through the first circular hole 302, the second bearing 203 is placed inside the first circular hole 302, and the first bearing 201 is placed inside the circular slot 102. The two support points can provide a relatively stable support structure, so that the gear shaft 200 can be supported and kept in balance, preventing it from tipping over.

[0025] Preferably, the upper shell 100 and the lower shell 300 are respectively provided with a first circular cavity 101 and a second circular cavity 301 of the same size; the inner diameter of the first circular cavity 101 and the second circular cavity 301 is the same as the diameter of the second gear 204. This ensures that the gear shaft 200 can be properly placed inside the supporting protective shell.

[0026] Better, such as Figure 4As shown, a second circular hole 103 is provided at the lower end of the first circular cavity 101 inside the upper shell 100. Half of the second circular hole 103 is higher than the inner wall of the first circular cavity 101, and the diameter of the second circular hole 103 matches the motor shaft head. This allows the second gear 204 to mesh precisely with the motor shaft head, preventing misalignment.

[0027] Better, such as Figure 5 As shown, the lower end of the outer shell 100 is provided with a slot 105 that matches the motor end cover. This allows the protective shell to be precisely connected to the motor and prevents tilting.

[0028] Better, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the upper shell 100 has four identical first fixing holes 104 at its four corners, and the lower shell 300 has four identical second fixing holes 303 at its four corners. The positions of the first fixing holes 104 and the second fixing holes 303 are matched. This ensures a precise connection between the upper shell 100 and the lower shell 300, preventing gaps between them and avoiding impurities from entering the motor and affecting its operation.

[0029] Better, such as Figure 2 As shown, the first gear 201 is a helical gear with a circular arc tooth profile. The helical gear makes the meshing process smoother and can effectively reduce noise. At the same time, the circular arc tooth profile can further reduce noise during meshing due to the smooth transition of the contact point. In addition, the meshing area between the helical gear and the circular arc tooth profile is large, which helps to dissipate heat, reduces friction between components, and increases the service life of the gear shaft 200.

[0030] Better, such as Figure 2 As shown, the second gear 204 is a spur gear with a circular arc tooth profile. Spur gears have a relatively low meshing frequency, which means that at the same rotational speed, the gear's vibration frequency is lower, thereby reducing noise generation. At the same time, the circular arc tooth profile further reduces noise during meshing due to the smooth transition at the contact point.

[0031] Better, such as Figure 2 , Figure 3 As shown, the diameter and height of the first gear 201 are smaller than those of the second gear 204. The larger the diameter of the gear, the greater the inertial force it generates when rotating, resulting in different dynamic responses and acceleration performance of the gear shaft 200 at different locations.

[0032] Preferably, the surfaces of the upper shell 100 and the lower shell 300 are coated with a sound-absorbing coating, which can further absorb noise.

[0033] A support and protective shell is installed on the outside of the gear shaft 200, which enables the gear shaft 200 to be precisely connected to the motor and keeps the gear shaft 200 balanced when the motor vibrates, preventing it from tilting to the left or right and causing displacement that would affect the rotational accuracy of the motor. At the same time, it can isolate the noise generated by the gear shaft 200 during operation and prevent impurities from entering the motor and affecting its operation.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gear shaft for use in a three-in-one motor, comprising a gear shaft (200) and a supporting protective shell, wherein the gear shaft (200) comprises, from top to bottom, a first bearing (201), a first gear (202), a second bearing (203), and a second gear (204), connected in the middle by a shaft (205), characterized in that: The supporting protective shell includes an upper shell (100) and a lower shell (300), both of which are integrally formed; a first circular hole (302) is provided at the center of the second circular cavity (301) inside the lower shell (300); a circular slot (102) is provided at the center of the first circular cavity (101) inside the upper shell (100); the diameters of the first circular hole (302), the first bearing (201), the second bearing (203), the second gear (204), and the circular slot (102) are all the same.

2. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The upper shell (100) and the lower shell (300) are respectively provided with a first circular cavity (101) and a second circular cavity (301) of the same size; the inner diameter of the first circular cavity (101) and the second circular cavity (301) is the same as the diameter of the second gear (204).

3. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The lower end of the first circular cavity (101) inside the upper shell (100) is provided with a second circular hole (103). Half of the second circular hole (103) is higher than the inner wall of the first circular cavity (101), and its diameter is the same as that of the motor shaft head.

4. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The lower end of the outer shell (100) is provided with a slot (105) that matches the motor end cover.

5. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The upper shell (100) has four first fixing holes (104) of the same size at its four corners, and the lower shell (300) has four second fixing holes (303) of the same size at its four corners. The positions of the first fixing holes (104) and the second fixing holes (303) are matched.

6. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The first gear (202) is a helical gear with a circular arc tooth profile.

7. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The second gear (204) is a spur gear with a circular arc tooth profile.

8. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The diameter of the first gear (202) is larger than that of the second gear (204), and its height is smaller than that of the second gear (204).

9. A gear shaft for a three-in-one motor as described in claim 1, characterized in that: The surfaces of the upper shell (100) and the lower shell (300) are coated with sound-absorbing paint.

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