Speed reduction motor with motor and gear box axis offset

Abstract

The utility model discloses a gear motor with a motor and a gear box axis biased, and relates to the technical field of gear motors. The device comprises a connecting plate, one side of the connecting plate is provided with an inner tooth shell, and the other side of the connecting plate is provided with a driving motor; an eccentric assembly is arranged on one side of the connecting plate and comprises a first gear installed at the output end of the driving motor, a second gear engaged with one side of the first gear and a third gear engaged with one side of the second gear. According to the utility model, the structure is compact, the maximum radial space of the motor pins is utilized, so that the radial size of the whole product is minimum, the axis of the motor and the output shaft of the output-stage planetary gearbox are offset and not concentric, but the planetary output shaft is ensured to still extend out of the center of the whole product, and the metal stretching spacer bush is arranged in the middle; and the friction force is smaller than that of plastic cement after lubricating oil is added by utilizing the smoothness of the metal surface, so that the transmission efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of geared motor technology, and in particular relates to a geared motor in which the motor and gearbox shafts are offset. Background Technology

[0002] A geared motor is a device that combines a motor with a speed reduction mechanism. It combines the high-speed rotation characteristics of a motor with the speed reduction function of a speed reduction mechanism to reduce speed and increase torque. Through the speed reduction mechanism (such as gears, worm gears, etc.), the original high speed of the motor can be reduced to a suitable speed range as required, while outputting greater torque to meet the working requirements of various mechanical equipment under different working conditions.

[0003] Current planetary gearboxes all feature a coaxial structure between the motor and gearbox. Typically, the stepper motor leads extend beyond the circle of the motor housing, resulting in the maximum diameter of both the motor and gearbox being significantly larger than the outer diameter of the motor housing. For installation structures with extremely limited space, it's necessary to utilize the minimum space encompassing both the motor housing and leads, greatly increasing installation difficulty. To address this, we provide a geared motor with an offset shaft between the motor and gearbox to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this utility model is to provide a geared motor with the motor and gearbox shafts offset. By setting the eccentric component, it solves the problem that in the prior art planetary gearboxes, the motor and gearbox are designed to be on the same axis, which causes the maximum diameter of the motor and gearbox to be much larger than the outer diameter of the motor housing, thus increasing the difficulty of installation.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0006] This utility model is a geared motor with the motor and gearbox shaft offset. It includes a connecting plate, an internal gear housing is installed on one side of the connecting plate, and a drive motor is installed on the other side of the connecting plate. An eccentric assembly is provided on one side of the connecting plate. The eccentric assembly includes a first gear installed at the output end of the drive motor, a second gear meshing with one side of the first gear, and a third gear meshing with one side of the second gear.

[0007] The present invention is further configured such that a sun gear is installed on the other side of the third gear, the sun gear meshes with the planet gear, the planet gear meshes with the internal gear ring, the planet gear is installed on the planet carrier, a planet carrier is installed on one side of the planet gear, and an output shaft is installed on one side of the planet carrier.

[0008] The present invention is further configured such that a metal plate is disposed between the connecting plate and the drive motor, and the metal plate and the drive motor are fixed by laser welding.

[0009] The present invention is further configured such that the connecting plate and the metal plate are integrally injection molded (the metal plate is placed in a mold and integrally injection molded), and the inner tooth outer shell is fitted and assembled on the connecting plate.

[0010] The present invention is further configured such that a gear shaft is installed at the center of the second gear shaft, the gear shaft and the connecting plate are tightly fitted, and the gear shaft is pressed into the connecting plate by means of a pressing shaft, there is a gap between the center hole of the gear and the gear shaft, and the gear rotates around the gear shaft.

[0011] The present invention is further configured such that a metal spacer is installed inside the inner tooth housing, and a retaining ring is installed on the surface of the output shaft.

[0012] The present invention has the following beneficial effects.

[0013] 1. This utility model has a compact structure, utilizing the maximum radial space of the motor pins to minimize the radial dimension of the entire product. The motor shaft and the output shaft of the output stage planetary gearbox are offset and not concentric, but the planetary output shaft is still centered on the entire product. A metal stretching sleeve is set in the middle to isolate the third gear and the planetary gears. Utilizing the smoothness of the metal surface, the friction is lower than that of plastic after adding lubricating oil, which improves the transmission efficiency. The metal sleeve isolates the internal gear ring and the connecting plate, reducing the manufacturing difficulty of the internal gear ring. The internal gear ring is both the internal gear of the planetary gear system and the outer shell of the product. The connection position with the connecting plate is very thin, which is difficult to manufacture and the precision is not easy to guarantee for plastic parts. The metal stretching sleeve can make up for the manufacturing difficulty and precision.

[0014] 2. In order to make full use of the space of the motor pins, the diameter of the gearbox of the geared motor is designed according to the minimum construction circle of the motor housing and pins. In order to solve the problem of the motor shaft and the output shaft being misaligned, the motor and the gearbox are placed off-center. The sun gear of the planetary level is adjusted to the axis of the output shaft through a two-stage parallel shaft transmission, which greatly utilizes the space of the stepper motor pins and minimizes the space in the diameter direction.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a three-dimensional view of a geared motor in which the motor and gearbox shafts are offset.

[0018] Figure 2This is a side view of the drive motor in a geared motor where the motor and gearbox shafts are offset.

[0019] Figure 3 This is a structural cross-sectional view of a geared motor in which the motor and gearbox shafts are offset.

[0020] Figure 4 In a geared motor where the motor and gearbox shafts are offset, Figure 3 Side view.

[0021] Figure 5 This is a partial structural cross-sectional view of a geared motor in which the motor and gearbox shafts are offset.

[0022] In the attached diagram: 1. Connecting plate; 2. Internal gear housing; 3. Drive motor; 4. First gear; 5. Second gear; 6. Third gear; 7. Planetary gear; 9. Planetary carrier; 10. Output shaft; 11. Metal plate; 12. Gear shaft; 13. Metal spacer; 14. Snap ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1

[0025] Please see Figures 1-5 This utility model is a geared motor with the motor and gearbox shafts offset. It includes a connecting plate 1, an internal gear housing 2 installed on one side of the connecting plate 1, and a drive motor 3 installed on the other side of the connecting plate 1. An eccentric component is provided on one side of the connecting plate 1. The eccentric component includes a first gear 4 installed at the output end of the drive motor 3, a second gear 5 meshing with one side of the first gear 4, and a third gear 6 meshing with one side of the second gear 5. The pins of the drive motor 3 and the housing construction circle are not concentric with the output end of the drive motor, while the output shaft 10 of the planetary gearbox, the internal gear housing 2 and the motor shaft are all coaxial. The internal gear housing 2 is made of a semi-transparent light-transmitting material and is reinforced to the connecting plate 1 by laser welding or adhesive bonding. The first gear 4, the second gear 5 and the third gear 6 are parallel shaft gears, wherein the first gear 4 and the second gear 5 are external meshing gears and the third gear 6 is an internal meshing gear.

[0026] Example 2

[0027] Please see Figures 1-5Based on embodiment 1, a sun gear is provided on one side of the third gear 6, which meshes with the planet gears 7. There are three planet gears 7. A planet carrier 9 is installed on one side of the planet gears 7, and an output shaft 10 is installed on one side of the planet carrier 9. A metal plate 11 is provided between the connecting plate 1 and the drive motor 3. The metal plate 11 and the drive motor 3 are fixed by laser welding. The connecting plate 1 is made by insert injection molding. The inner gear housing 2 is fitted and assembled on the connecting plate 1. A gear shaft 12 is installed at the shaft center of the second gear 5. The gear shaft 12 and the connecting plate 1 are tightly fitted and pressed into the connecting plate 1 by pressing the shaft. There is a gap between the center hole of the gear 5 and the gear shaft 12. The gear 5 rotates around the gear shaft 12. A metal spacer 13 is installed inside the inner gear housing 2. A snap ring 14 is installed on the surface of the output shaft 10.

[0028] The working principle of this utility model is as follows: the first gear 4, the second gear 5 and the third gear 6 are parallel shaft gears, wherein the first gear 4 and the second gear 5 are external meshing gears, the third gear 6 is an internal meshing gear, and the outer end of the third gear 6 is provided with a sun gear. The first gear 4 is mounted on the output shaft of the drive motor 3. The gearbox drives the second gear 5 to rotate, and the second gear 5 drives the third gear 6 to rotate. Through this two-stage transmission design, the axis of the third gear 6 is moved back to the center of the construction circle of the housing and the pin, so that the sun gear on the third gear 6 is also concentric with the design construction circle, and thus the axis of the planetary gearbox part also falls on the design construction circle center.

[0029] The sun gear on the third gear 6 drives the planet gear 7 to rotate. The planet gear 7 meshes with the sun gear and rotates. At the same time, it meshes with the external gear ring 8 on the stationary internal gear housing 2. The planets rotate on their own axis and also revolve around the sun gear, thereby driving the planet carrier 9 to rotate. The planet carrier 9 drives the output shaft 10 to rotate. The space of the motor pins is fully utilized, and the diameter of the gearbox of the geared motor is designed according to the minimum construction circle of the motor housing and pins.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reduction motor with motor and gearbox axis offset, comprising a connection plate (1), characterized in that: The connecting plate (1) is provided with an inner tooth shell (2) on one side, and a driving motor (3) on the other side; The connecting plate (1) is provided with an eccentric assembly on one side, which comprises a first gear (4) installed on the output end of the driving motor (3), a second gear (5) engaged on one side of the first gear (4), and a third gear (6) engaged on one side of the second gear (5).

2. The motor and gearbox shaft center offset reduction motor of claim 1, wherein: The third gear (6) is provided with a planetary gear (7) on one side, the planetary gear (7) is provided with a planetary carrier (9) on one side, and the planetary carrier (9) is provided with an output shaft (10) on one side.

3. The motor and gearbox axis misalignment reduction motor of claim 1, wherein: The connecting plate (1) is provided with a metal plate (11) between the connecting plate (1) and the driving motor (3), and the metal plate (11) and the driving motor (3) are fixed by laser welding.

4. The motor and gearbox shaft center offset reduction motor of claim 1 wherein: The connecting plate (1) is made of plastic injection molding, and the inner tooth shell (2) is fitted on the connecting plate (1).

5. The motor and gearbox shaft center offset reduction motor of claim 1 wherein: The second gear (5) is provided with a gear shaft (12) at the center of the shaft, the gear shaft (12) and the connecting plate (1) are tightly fitted, and the gear shaft (12) is pressed into the connecting plate (1) by pressing shaft, there is a gap between the gear (5) center hole and the gear shaft (12), and the gear (5) rotates around the gear shaft (12).

6. A motor and gearbox shaft misalignment reduction motor according to claim 2, wherein: The inner tooth shell (2) is provided with a metal spacer (13) inside, and the output shaft (10) is provided with a circlip (14) on the surface.

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