CN109412332B - Motor speed reducer and lifting upright post - Google Patents
Motor speed reducer and lifting upright post Download PDFInfo
- Publication number
- CN109412332B CN109412332B CN201811246792.5A CN201811246792A CN109412332B CN 109412332 B CN109412332 B CN 109412332B CN 201811246792 A CN201811246792 A CN 201811246792A CN 109412332 B CN109412332 B CN 109412332B
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- transmission shaft
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- worm
- transmission
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- 239000003638 chemical reducing agent Substances 0.000 title claims description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 124
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gear Transmission (AREA)
Abstract
The invention provides a motor speed reducing device and a lifting upright post, which comprise a motor, a speed reducing box body and a transmission shaft, wherein a worm is arranged on a motor shaft of the motor, an output shaft is arranged on the speed reducing box body, a large gear is arranged on the output shaft, the output shaft is arranged in parallel with the worm, the transmission shaft comprises a first transmission shaft and a second transmission shaft, a first worm wheel and a first pinion which synchronously rotate are arranged on the first transmission shaft, a second worm wheel and a second pinion which synchronously rotate are arranged on the second transmission shaft, the first worm wheel and the second worm wheel are respectively meshed with the worm for transmission, and the first pinion and the second pinion are respectively meshed with the large gear for transmission, so that the large gear is driven by the two pinions to rotate, the bearing capacity of the large gear is improved, the service life of the motor speed reducing device is prolonged, the transmission is more stable, the transmission noise is reduced, and the axis of the first transmission shaft and the axis of the second transmission shaft are arranged in a crossed manner, so that the structure in the speed reducing box body is compact. The lifting upright post has the advantages of large bearing capacity, small whole volume and long service life.
Description
Technical Field
The invention relates to the technical field of electric lifting columns, in particular to a motor speed reducing device and a lifting column.
Background
The lifting upright post is widely applied in daily life due to the advantages of adjustable height and convenient carrying, and the lifting upright post drives the transmission assembly to stretch out and draw back through the motor speed reducer so as to drive the sleeve assembly outside the transmission assembly to stretch out and draw back, so that the lifting function is realized. Along with the wide application of the lifting upright post, the requirements on the motor speed reducing device are higher and higher, so that the motor speed reducing device is compact in structure, saves space and has larger bearing capacity, and the existing motor speed reducing device cannot meet the requirements.
Disclosure of Invention
The invention aims to provide a motor speed reducing device and a lifting upright post which are compact in structure and high in bearing capacity.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a motor speed reducer, including the motor, the reducing gear box and locate the transmission shaft in the reducing gear box, be equipped with the worm on the motor shaft of motor, be equipped with the output shaft on the reducing gear box, be equipped with the gear wheel on the output shaft, output shaft and worm parallel arrangement, the transmission shaft includes first transmission shaft and second transmission shaft, the axis of first transmission shaft and the axis cross arrangement of second transmission shaft, be equipped with synchronous rotation's first worm wheel and first pinion on the first transmission shaft, be equipped with synchronous rotation's second worm wheel and second pinion on the second transmission shaft, first worm wheel and second worm wheel respectively with worm meshing transmission, first pinion and second pinion respectively with gear wheel meshing transmission.
Further, the axis of the first transmission shaft and the axis of the second transmission shaft are located on the same plane, the rotation center line of the worm and the rotation center line of the large gear are connected on the plane to form a central connecting line, and the axis of the first transmission shaft and the axis of the second transmission shaft are symmetrically arranged along the central connecting line.
Further, the center connecting line is arranged in parallel with the inner wall of the reduction gearbox body.
Further, an included angle between the axis of the first transmission shaft and the central connecting line is a, and a is more than or equal to 18 degrees and less than or equal to 60 degrees.
Further, the intersection point of the axis of the first transmission shaft and the axis of the second transmission shaft is a first intersection point, the intersection point of the rotation center line of the large gear and the rotation center line of the first pinion is a second intersection point, the intersection point of the rotation center line of the large gear and the rotation center line of the second pinion is a third intersection point, and the first intersection point, the second intersection point and the third intersection point are overlapped.
Further, the first pinion is sleeved on the first transmission shaft through the first expansion sleeve, and/or the second pinion is sleeved on the second transmission shaft through the second expansion sleeve.
Further, the worm and the output shaft are both positioned on the upper side of the reduction gearbox body; or the worm and the output shaft are both positioned at the lower side of the reduction gearbox body.
Further, the large gear, the first small gear and the second small gear are spiral bevel gears; or the large gear, the first small gear and the second small gear are all crown gears.
Further, the first worm gear and the second worm gear are both helical gears.
The invention further discloses a lifting upright post, which comprises a motor speed reducer, a transmission assembly in transmission connection with the motor speed reducer and a sleeve arranged outside the transmission assembly, wherein the motor speed reducer is any motor speed reducer in the technical scheme.
After the technical scheme is adopted, the invention has the following advantages:
1. The worm on the motor shaft stretches into the reduction gearbox body to be matched with the first worm wheel and the second worm wheel in a transmission manner, and when the motor rotates, the worm on the motor shaft drives the first transmission shaft and the second transmission shaft to rotate and drives the first pinion and the second pinion to rotate so as to enable the large gear to rotate. The large gear is driven to rotate by the two small gears, the bearing capacity of the large gear is improved, the bearing capacity of the output shaft is further improved, the service life of the motor speed reducer is prolonged, the transmission is stable, and the transmission noise is reduced. Meanwhile, the output shaft is arranged in parallel with the worm, so that the motor speed reducer occupies a central space in the longitudinal direction, the motor speed reducer is more compact in structure as a whole, the axis of the first transmission shaft and the axis of the second transmission shaft are arranged in a crossed mode, the structure in the speed reducer box is compact on the premise of improving bearing capacity, and the size of the motor speed reducer is reduced.
2. Through setting up the axis of first transmission shaft and the axis of second transmission shaft along central connecting line symmetry setting for first worm wheel and second worm wheel effect are comparatively symmetrical on the worm, make the transmission of first transmission shaft and second transmission shaft more steady, simultaneously, it is compacter in the structure, practice thrift the space.
3. Through setting up the central connecting line and being parallel with the inner wall of reduction gearbox body for the axis of worm equals to the axis of output shaft to the distance of reduction gearbox body inner wall, makes the structure in the reduction gearbox body compacter, reduces the volume of reduction gearbox body.
4. Through setting up the contained angle between the axis of first transmission shaft and the center connecting wire between 18 to 60 for first worm wheel and the first pinion on the first transmission shaft can both normally rotate, can not produce the interference with other parts. When a is smaller than 18 degrees, interference is easy to occur between the first transmission shaft and the second pinion; when a > 60 °, interference between the first pinion and the second pinion easily occurs.
5. Through setting up first intersection point, second intersection point and third intersection point coincidence, when making first transmission shaft, second transmission shaft rotate under first worm wheel, second worm wheel drive, the meshing transmission between first pinion, second pinion and the gear wheel is steady, and then makes motor reduction gear's transmission more stable for motor reduction gear's use is more reliable.
6. The first pinion and the second pinion are respectively fixed on the first transmission shaft and the second transmission shaft through the first expansion sleeve and the second expansion sleeve, so that the assembly of the first pinion and the second pinion is simpler, the consistency of the side gaps among the first pinion, the second pinion and the large gear is ensured, the contact strength of the first pinion, the second pinion and the large gear is improved, and the service life is prolonged.
7. Through setting up worm and output shaft in the upside or the downside of reducing gear box for motor reduction gear is compacter in vertical structure, reduces motor reduction gear's volume.
8. The invention also discloses a lifting upright post, which comprises a motor speed reducer, a transmission assembly in transmission connection with the motor speed reducer and a sleeve arranged outside the transmission assembly, wherein the motor speed reducer adopts the motor speed reducer in any technical scheme, and the bearing capacity of the motor speed reducer is large, the structure is compact, so that the bearing capacity of the lifting upright post is large, the whole volume is smaller, and the service life is long.
Drawings
The invention is further described below with reference to the accompanying drawings:
Fig. 1 is a schematic structural view of the motor reduction gear according to the present invention after the upper case cover is removed.
Fig. 2 is a top view of the motor reduction gear according to the present invention with the upper case cover removed.
Fig. 3 is an exploded view of the motor reduction gear according to the present invention.
The names of the components marked in the figure are as follows:
1. A motor; 11. a worm; 2. a reduction gearbox body; 21. a lower box body; 22. an upper case cover; 3. a first drive shaft; 31. a first worm wheel; 32. a first pinion gear; 33. a first expansion shell; 34. a first bearing; 35. a second bearing; 4. a second drive shaft; 41. a second worm wheel; 42. a second pinion gear; 43. a second expansion shell; 44. a third bearing; 45. a fourth bearing; 5. an output shaft; 51. a large gear; 52. a fifth bearing; 6. a central connecting line; 7. a first intersection point; 8. and (3) mounting a plate.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples. It is to be understood that the terms "upper," "lower," "left," "right," "longitudinal," "transverse," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like, as used herein, are merely based on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the devices/elements referred to must have or be configured and operated in a particular orientation and therefore should not be construed as limiting the invention.
As shown in fig. 1 to 3, the invention provides a motor speed reducing device, which comprises a motor 1, a speed reducing box body 2 and a transmission shaft arranged in the speed reducing box body 2, wherein the speed reducing box body 2 comprises a lower box body 21 and an upper box cover 22, the motor 1 is fixed at the bottom of the lower box body 21, a worm 11 is arranged on a motor shaft of the motor 1, an output shaft 5 is arranged on the speed reducing box body 2, a large gear 51 is arranged on the output shaft 5, the output shaft 5 is arranged in parallel with the worm 11, the transmission shaft comprises a first transmission shaft 3 and a second transmission shaft 4, the axis of the first transmission shaft 3 is crossed with the axis of the second transmission shaft 4, a first worm wheel 31 and a first small gear 32 which synchronously rotate are arranged on the first transmission shaft 3, a second worm wheel 41 and a second small gear 42 which synchronously rotate are arranged on the second transmission shaft 4, the first worm wheel 31 and the second worm wheel 41 are respectively meshed with the worm 11, and the first small gear 32 and the second small gear 42 are respectively meshed with the large gear 51. The worm 11 on the motor shaft stretches into the reduction gearbox 2 to be in transmission fit with the first worm wheel 31 and the second worm wheel 41, and when the motor 1 rotates, the worm 11 on the motor shaft drives the first transmission shaft 3 and the second transmission shaft 4 to rotate and drives the first pinion 32 and the second pinion 42 to rotate so as to enable the large gear 51 to rotate. The big gear 51 is driven to rotate by the two small gears, the bearing capacity of the big gear 51 is improved, the bearing capacity of the output shaft 5 is further improved, the service life of the motor speed reducer is prolonged, the transmission is stable, and the transmission noise is reduced. Meanwhile, the output shaft 5 and the worm 11 are arranged in parallel, so that the motor speed reducer occupies a space in the vertical direction in a concentrated manner, the structure of the motor speed reducer is more compact as a whole, the axis of the first transmission shaft 3 and the axis of the second transmission shaft 4 are arranged in a crossed manner, the structure in the reduction gearbox body 2 is compact on the premise of improving the bearing capacity, and the volume of the motor speed reducer is reduced.
In this embodiment, the axis of the first transmission shaft 3 and the axis of the second transmission shaft 4 are located on the same plane, so that the motor speed reducing device is more compact in longitudinal direction, the rotation center line of the worm 11 and the rotation center line of the large gear 51 are connected on the plane as the center connecting line 6, the axis of the first transmission shaft 3 and the axis of the second transmission shaft 4 are symmetrically arranged along the center connecting line 6, so that the forces acting on the worm 11 by the first worm wheel 31 and the second worm wheel 41 are relatively symmetrical, the transmission of the first transmission shaft 3 and the second transmission shaft 4 is relatively stable, and meanwhile, the structure is relatively compact, and the space is saved.
Specifically, the center connecting line 6 is parallel to the inner wall of the reduction gearbox body 2, so that the distance from the axis of the worm 11 to the inner wall of the reduction gearbox body 2 is equal to the distance from the axis of the output shaft 5 to the inner wall of the reduction gearbox body 2, the structure in the reduction gearbox body 2 is more compact, and the volume of the reduction gearbox body 2 is reduced.
The included angle between the axis of the first transmission shaft 3 and the central connecting line 6 is a, and a is more than or equal to 18 degrees and less than or equal to 60 degrees, so that the first worm wheel 31 and the first pinion 32 on the first transmission shaft 3 can normally rotate and cannot interfere with other parts. In this embodiment, a takes 20 ° for do not interfere between first transmission shaft and the second pinion, do not interfere between first pinion and the second pinion yet, and the structure is compacter.
The intersection point of the axis of the first transmission shaft 3 and the axis of the second transmission shaft 4 is a first intersection point 7, the intersection point of the rotation center line of the large gear 51 and the rotation center line of the first small gear 32 is a second intersection point, the intersection point of the rotation center line of the large gear 51 and the rotation center line of the second small gear 42 is a third intersection point, and the first intersection point 7, the second intersection point and the third intersection point are overlapped, so that when the first transmission shaft 3 and the second transmission shaft 4 rotate under the drive of the first worm gear 31 and the second worm gear 41, the meshing transmission among the first small gear 32, the second small gear 42 and the large gear 51 is stable, and the transmission of the motor reduction device is stable, so that the motor reduction device is more reliably used.
The first pinion 32 is sleeved on the first transmission shaft 3 through the first expansion sleeve 33, and the second pinion 42 is sleeved on the second transmission shaft 4 through the second expansion sleeve 43, so that the assembly of the first pinion 32 and the second pinion 42 is simpler, the consistency of the side gaps among the first pinion 32, the second pinion 42 and the large gear 51 is ensured, the contact strength of the first pinion 32, the second pinion 42 and the large gear 51 is improved, and the service life is prolonged.
The worm 11 and the output shaft 5 are both positioned at the lower side of the reduction gearbox body 2, so that the motor reduction gear is more compact in longitudinal structure, and the volume of the motor reduction gear is reduced.
The first worm wheel 31 and the second worm wheel 41 are both helical gears, the axial intersection angle of the first worm wheel 31 and the worm 11 is 90 degrees, the axial intersection angle of the second worm wheel 41 and the worm 11 is 90 degrees, the power in the original vertical direction is converted into the horizontal direction, the first worm wheel 31 and the second worm wheel 41 adopt helical gears, certain self-locking capacity is achieved, meanwhile, a large transmission ratio can be achieved among the first worm wheel 31, the second worm wheel 41 and the worm 11, and noise is small in helical gear transmission.
The large gear 51, the first small gear 32 and the second small gear 42 are spiral bevel gears, the intersection angle of the first small gear 32 and the large gear 51 is 90 degrees, the intersection angle of the second small gear 42 and the large gear 51 is 90 degrees, so that the power in the original horizontal direction is converted into the vertical direction again, the axial direction of the output shaft 5 is parallel to the axial direction of the screw rod, and meanwhile, the spiral bevel gears are stable in transmission, low in transmission noise and high in transmission efficiency.
In order to increase the transmission stability of the first worm wheel 31 and the first pinion 32, the first transmission shaft 3 is provided with a first bearing 34 and a second bearing 35, the first worm wheel 31 is located between the first bearing 34 and the second bearing 35, the bottom wall of the lower box 21 is provided with a first half groove and a second half groove, the top wall of the upper box cover 22 is provided with a third half groove and a fourth half groove, the first bearing 34 is positioned and installed in the installation space formed by the first half groove and the third half groove, the second bearing 35 is positioned and installed in the installation space formed by the second half groove and the fourth half groove, and the jumping degree of the first transmission shaft 3 and the first worm wheel 31 can be effectively reduced by using the mode of installing the two bearings, and meanwhile, the axial displacement of the worm wheel can be reduced, so that the meshing degree of the first worm wheel 31 and the worm 11 is better.
Similarly, in order to increase the transmission stability of the second worm wheel 41 and the second pinion 42, the second transmission shaft 4 is provided with a third bearing 44 and a fourth bearing 45, the second worm wheel 41 is located between the third bearing 44 and the fourth bearing 45, the bottom wall of the lower case cover is provided with a fifth half groove and a sixth half groove, the top wall of the upper case cover 22 is provided with a seventh half groove and an eighth half groove, the third bearing 44 is positioned and installed in an installation space formed by the fifth half groove and the seventh half groove, the fourth bearing 45 is positioned and installed in an installation space formed by the sixth half groove and the eighth half groove, and by using a mode of installing the two bearings, the jumping degree of the second transmission shaft 4 and the second worm wheel 41 can be effectively reduced, and meanwhile, the axial displacement of the worm wheel can be reduced, so that the meshing degree of the second worm wheel 41 and the worm 11 is better.
The output shaft 5 is limited in position in the vertical direction through the mounting plate 8, and a fifth bearing 52 is sleeved on the output shaft 5, so that the rotation of the output shaft 5 is smoother.
The invention also discloses a lifting upright post, which comprises a motor speed reducer, a transmission assembly in transmission connection with the motor speed reducer and a sleeve arranged outside the transmission assembly, wherein the motor speed reducer is the motor speed reducer in any technical scheme, and the bearing capacity of the motor speed reducer is large, the structure is compact, so that the bearing capacity of the lifting upright post is large, the whole volume is smaller, and the service life is long.
It will be appreciated that a may also take the form of 18 °,19 °,21 °,22 °,23 °,24 °,25 °,30 °,35 °,40 °,45 °,50 °,55 °,60 °, etc.
It can be understood that the first pinion may be sleeved on the first transmission shaft through the first expansion sleeve, and the second pinion may be sleeved on the second transmission shaft through the key sleeve.
It can be understood that the first pinion may be sleeved on the first transmission shaft through a key, and the second pinion may be sleeved on the second transmission shaft through a second expansion sleeve.
It will be appreciated that the worm gear and the output shaft may both be located on the upper side of the reduction gearbox.
It can be understood that the worm is also positioned on the upper side of the reduction gearbox body, and the output shaft is positioned on the lower side of the reduction gearbox body; or the worm is positioned at the lower side of the reduction gearbox body, and the output shaft is positioned at the upper side of the reduction gearbox body.
It will be appreciated that crown gears may also be employed for the large gear, the first pinion and the second pinion.
In addition to the above preferred embodiments, the present invention has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention, which is defined in the appended claims.
Claims (7)
1. The motor speed reducing device comprises a motor, a speed reducing box body and a transmission shaft arranged in the speed reducing box body, wherein a worm is arranged on a motor shaft of the motor, an output shaft is arranged on the speed reducing box body, and a large gear is arranged on the output shaft; the intersection point of the axis of the first transmission shaft and the axis of the second transmission shaft is a first intersection point, the intersection point of the rotation center line of the large gear and the rotation center line of the first pinion is a second intersection point, the intersection point of the rotation center line of the large gear and the rotation center line of the second pinion is a third intersection point, and the first intersection point, the second intersection point and the third intersection point are overlapped; the included angle between the axis of the first transmission shaft and the central connecting line is a, and a is more than or equal to 18 degrees and less than or equal to 60 degrees; the axis of the first transmission shaft and the axis of the second transmission shaft are located on the same plane, the rotation center line of the worm and the rotation center line of the large gear are connected on the plane to form a central connecting line, and the axis of the first transmission shaft and the axis of the second transmission shaft are symmetrically arranged along the central connecting line.
2. The motor reduction device according to claim 1, wherein the center connection line is disposed in parallel with an inner wall of the reduction gearbox.
3. The motor reduction device according to claim 1, wherein the first pinion is sleeved on the first transmission shaft through a first expansion sleeve, and/or the second pinion is sleeved on the second transmission shaft through a second expansion sleeve.
4. The motor reduction gear according to claim 1, wherein the worm and the output shaft are both located at an upper side of the reduction gearbox; or the worm and the output shaft are both positioned at the lower side of the reduction gearbox body.
5. The motor reduction gear according to any one of claims 1 to 4, wherein the large gear, the first pinion gear, and the second pinion gear are spiral bevel gears; or the large gear, the first small gear and the second small gear are all crown gears.
6. The motor reduction gear according to any one of claims 1 to 4, wherein the first worm wheel and the second worm wheel are both helical gears.
7. A lifting upright post, comprising a motor speed reducer, a transmission assembly in transmission connection with the motor speed reducer and a sleeve arranged outside the transmission assembly, wherein the motor speed reducer is the motor speed reducer of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246792.5A CN109412332B (en) | 2018-10-25 | 2018-10-25 | Motor speed reducer and lifting upright post |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246792.5A CN109412332B (en) | 2018-10-25 | 2018-10-25 | Motor speed reducer and lifting upright post |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109412332A CN109412332A (en) | 2019-03-01 |
| CN109412332B true CN109412332B (en) | 2024-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811246792.5A Active CN109412332B (en) | 2018-10-25 | 2018-10-25 | Motor speed reducer and lifting upright post |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109412332B (en) |
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| US7165474B2 (en) * | 2003-05-28 | 2007-01-23 | The Boeing Company | Torque dividing gear drive system and method of driving an output gear |
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