JP3148892U - Self-propelled vacuum cleaner rear wheel drive - Google Patents

Abstract

A rear-wheel drive device for a self-propelled cleaner that achieves low noise and an extended service life is provided. A housing, a motor, a planetary gear mechanism, a rotation drive unit, an inner ring gear mechanism, and a tire are provided. The motor 13 is mounted in the housing and has a worm 14 at the front end. The planetary gear mechanism 21 is mounted in the housing, has a sun gear mechanism 22 and at least one planetary gear 24, and can be rotated by driving the worm 14. The rotation drive unit 41 has a connecting portion 42 and a protruding portion 43, and the connecting portion 42 is used for connecting the planetary gear 24. The inner ring gear mechanism 31 is mounted in the housing so as to mesh with the planetary gear 24. The connecting portion 42 passes through the inner ring gear mechanism 31 and connects the planetary gear 24. The protrusion 43 penetrates the housing. The tire 15 is positioned outside the housing, and the center portion is coupled to the protruding portion 43. [Selection] Figure 2

Description

  The present invention relates to a drive device, and more particularly to a rear wheel drive device of a self-propelled cleaner.

  The drive device of the conventional self-propelled cleaner is designed to drive the rear wheel of the self-propelled cleaner by the drive device to achieve the movement of the self-propelled cleaner. The driving device drives a reduction gear mechanism by a motor, and outputs power of the motor by the reduction gear mechanism to drive a rear wheel.

  In the reduction gear mechanism, all gears mesh with each other, so the power output from the motor is transferred from one gear to the next single gear, and then the shaft drives the rotation of the tire. To do. Therefore, every gear is subjected to a very large pressure during rotation, and seriously wears the tooth-shaped part between the gears meshing with each other. Further, since the gear transmits the rotational force directly to the next gear during rotation, noise is generated when the gear rotates while meshing with each other. Therefore, when the self-propelled cleaner rotates, not only a very loud noise is generated in the drive device, but also the application function of the entire drive device is lost because there is no protective cover on the rotating shaft. .

  As described above, since the conventional self-propelled cleaner driving device has the above-mentioned drawbacks, there is room for improvement.

  The main purpose of the present invention is to provide a rear-wheel drive device for a self-propelled vacuum cleaner that makes it possible to realize low noise and extended service life by avoiding shaft wear and suppressing noise during travel. It is to be.

  In order to achieve the above object, a rear wheel drive device for a self-propelled cleaner according to the present invention includes a housing, a motor, a planetary gear mechanism, a rotation drive unit, an inner ring gear mechanism, and a tire. The motor is mounted in the housing and has a worm at the front end. The planetary gear mechanism is mounted in the housing, has a sun gear mechanism and at least one planetary gear, and can be rotated by driving a worm. The rotary drive unit has a connecting part and a protruding part, and the connecting part is used for connecting planetary gears. The inner ring gear mechanism is mounted in the housing so as to mesh with the planetary gear. The connecting portion passes through the inner ring gear mechanism and connects the planetary gear. The protrusion passes through the housing. The tire is positioned on the outside of the housing, and the center portion is coupled to the protrusion.

  The rear wheel drive device of the self-propelled vacuum cleaner according to the present invention rotates the star gear by the above-described structure to reduce the torque of the interaction between the gears, so that the gears are not worn and the gears mesh with each other. Since the shaft is designed to be protected, it is possible to give the self-propelled cleaner good abrasion resistance and silent characteristics.

In order to describe the structure, features, and effects of the present invention in detail, the description will proceed based on the following embodiments and drawings.
As shown in FIGS. 1 to 5, a rear wheel drive device 10 for a self-propelled cleaner according to an embodiment of the present invention includes a housing 51, a motor 13, a planetary gear mechanism 21, a rotation drive unit 41, and an inner ring gear mechanism 31. Is provided.

  The housing 51 has a left cover 11 and a right cover 12, and an accommodation space is formed by the combination of the left cover 11 and the right cover 12. The left cover 11 and the right cover 12 have through-holes 46 separately, and the through-holes 46 have an M-shaped seal member 45 on the lower side outside. The accommodation space can accommodate the motor 13, the planetary gear mechanism 21, the rotation drive unit 41, and the inner ring gear mechanism 31.

  The motor 13 is mounted in the housing 51 and has a worm 14 at the front end. The worm 14 can rotate along the first axis 17 by driving the motor 13.

  The planetary gear mechanism 21 is mounted in a housing 51 and has a sun gear mechanism 22 and three planetary gears 24. The sun gear mechanism 22 includes a first substrate 25 and a first annular wall 26 that is vertically connected to the first substrate 25. The first annular wall 26 has a worm wheel 27 on the outside, and the first substrate 25 has a sun gear 23 in the center. The planetary gear 24 meshes with the sun gear 23 on the first substrate 25. The worm wheel 27 meshes with the worm 14 and can rotate along the second axis 16 by driving the worm 14. The second axis 16 is perpendicular to the first axis 17. The inner ring gear mechanism 31 is mounted in the housing 51, has a second substrate 33, a second annular wall 32, an inner ring gear 34 positioned inside the second annular wall 32, and an outer surface of the second annular wall 32. Can be combined with the inner surface of the first annular wall 26 to surround the planetary gear 24 and the sun gear 23. The inner ring gear 34 meshes with the planetary gear 24.

  The rotation drive unit 41 has a connecting portion 42 and a protruding portion 43. Since the rotation drive unit 41 is mounted in the housing 51 and passes through one of the through holes 46 by the protrusion 43, the protrusion 43 is exposed to the outside of the housing 51. The connecting portion 42 passes through the second substrate 33 and connects the planetary gear 24. The protrusion 43 has a shaft 47 and a fitting protrusion 48 formed extending from the shaft 47, and the shaft 47 penetrates the left cover 11 or the right cover 12 through one of the through holes 46. The shaft 47 has a sleeve 44 on the outer periphery. The sleeve 44 is placed on the M-shaped seal member 45. The fitting protrusion 48 is fitted into the fitting hole 49 at the center of the tire 15.

  When using the rear-wheel drive device 10 of the self-propelled cleaner according to an embodiment of the present invention, as shown in FIG. 3, the fitting hole 49 at the center of the tire 15 and the fitting protrusion 48 are combined. The motor 13 is started and the worm 14 is rotated along the first axis 17 by the motor 13. At this time, since the worm wheel 27 of the sun gear mechanism 22 meshes with the worm 14, the sun gear mechanism 22 rotates along the second axis 16 along with the worm 14. In addition, the sun gear mechanism 22 rotates the sun gear 23 when rotating, and the inner wall of the sun gear mechanism 22 is coupled to the outer wall of the inner ring gear mechanism 31, so that the inner ring gear mechanism 31 rotates along the second axis 16. In addition, the three planetary gears 24 meshing with the inner ring gear 34 and the sun gear 23 can be rotated along the second axis 16.

  When the planetary gear 24 rotates along the second axis 16, the rotation drive unit 41 can rotate along the second axis 16. At this time, the shaft 47 and the outer sleeve 44 pass through the through hole 46 and rotate on the M-shaped seal member 45, and at the same time, the tire 15 fixed to the fitting protrusion 48 by interlocking rotation of the fitting protrusion 48. Rotation of the tire 15 can be achieved.

  As described above, the effects achieved by the present invention are as follows. The three planetary gears 24 not only disperse the torque that the original single gear should have received and reduce wear between the gears, but the torque is too great when the gears rotate. Therefore, it is possible to suppress the noise at the time of occlusion. The sleeve 44 and the M-shaped seal member 45 can reduce the wear of the shaft 47. Therefore, if the present invention is attached to a self-propelled cleaner, it is possible to suppress noise generated when the self-propelled cleaner rotates and to reduce the damage rate of the driving device of the self-propelled cleaner. .

  The constituent units posted according to the above-described embodiments are merely examples for explanation, and the scope of the present invention cannot be limited. Therefore, it is possible to replace the unit with an equivalent effect or to make an equivalent change of the effect. Should belong to the following claims.

It is a schematic diagram which shows the state which couple | bonds an inner ring | wheel gear mechanism and a planetary gear in the rear-wheel drive device of the self-propelled cleaner by one Embodiment of this invention. It is an exploded view showing a unit of a rear wheel drive device of a self-propelled cleaner according to an embodiment of the present invention. It is a schematic diagram which shows the operating state of the rear-wheel drive device of the self-propelled cleaner by one Embodiment of this invention. It is a schematic diagram which shows the three-dimensional structure of the rotational drive unit in the rear-wheel drive device of the self-propelled cleaner by one Embodiment of this invention. It is a schematic diagram which shows the left side state after the assembly of the rear-wheel drive device of the self-propelled cleaner by one Embodiment of this invention.

Explanation of symbols

10: Rear wheel drive device of self-propelled cleaner, 11: Left cover, 12: Right cover, 13: Motor, 14: Worm, 15: Tire, 16: Second axis, 17: First axis, 21: Planetary Gear mechanism, 22: sun gear mechanism, 23: sun gear, 24: planetary gear, 25: first substrate, 26: first annular wall, 27: worm wheel, 31: inner ring gear mechanism, 32: second annular wall, 33: 2nd board | substrate, 34: Inner ring gear, 41: Rotation drive unit, 42: Connection part, 43: Projection part, 44: Sleeve, 45: M-shaped sealing member, 46: Through-hole, 47: Shaft, 48: Fitting Mating protrusion 49: Fitting hole 51: Housing

Claims (4)

A rear wheel drive device for a self-propelled vacuum cleaner,
A housing having separate through-holes on the left and right sides, the through-holes having an M-shaped seal member below the outside;
A motor mounted in the housing, having a worm at the front end, the worm being capable of rotating along the first axis by driving the motor;
Mounted within the housing and having a sun gear mechanism and at least one planetary gear, the sun gear mechanism having a first substrate and a first annular wall vertically coupled to the first substrate, the first annular The wall has a worm wheel on the outside, the first substrate has a sun gear in the center, the planetary gear meshes with the sun gear on the first substrate, the worm wheel meshes with the worm, and is driven to the second axis by driving the worm. A planetary gear mechanism that is capable of rotating along a second axis, the second axis being perpendicular to the first axis;
Mounted in the housing, having a second substrate, a second annular wall, and an inner ring gear positioned inside the second annular wall, and an outer surface of the second annular wall is coupled to an inner surface of the first annular wall Can surround the planetary gear and the sun gear, the inner ring gear meshes with the planetary gear,
Mounted in the housing and has a connecting portion and a protruding portion, and the protruding portion penetrates one of the through holes, so that the protruding portion is exposed to the outside of the housing, and the protruding portion has a sleeve on the outer periphery A rotating drive unit that is mounted on the M-shaped seal member by the sleeve, the connecting portion passes through the second substrate, connects the planetary gear, and the projecting portion is fitted to the central axis of the tire. A rear-wheel drive device for a self-propelled vacuum cleaner.   The housing has a left cover and a right cover, and an accommodation space is formed by coupling the left cover and the right cover. The accommodation space can accommodate a motor, a planetary gear mechanism, a rotation drive unit, and an inner ring gear mechanism, and has a through hole. The self-propelled cleaner according to claim 1, wherein the rear drive unit is disposed on the left cover and the right cover, and the rotary drive unit passes through one of the left cover and the right cover through a through hole. Wheel drive device.   The protrusion has a shaft and a fitting protrusion formed extending from the shaft. The shaft penetrates the left cover by a through hole, and the fitting protrusion is fitted in the fitting hole at the center of the tire. The rear-wheel drive device of the self-propelled cleaner according to claim 1, wherein the rear-wheel drive device is combined.   The rear-wheel drive device for a self-propelled cleaner according to claim 3, wherein the sleeve is mounted on an outer periphery of the shaft.

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