CN114499038A - Integrated electric driving device - Google Patents
Integrated electric driving device Download PDFInfo
- Publication number
- CN114499038A CN114499038A CN202011150266.6A CN202011150266A CN114499038A CN 114499038 A CN114499038 A CN 114499038A CN 202011150266 A CN202011150266 A CN 202011150266A CN 114499038 A CN114499038 A CN 114499038A
- Authority
- CN
- China
- Prior art keywords
- output
- helical gear
- rotor
- stator assembly
- integrated electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000009467 reduction Effects 0.000 abstract description 15
- 230000003139 buffering effect Effects 0.000 description 26
- 230000000670 limiting effect Effects 0.000 description 12
- 238000013016 damping Methods 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010892 electric spark Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
- F16H2057/126—Self-adjusting during operation, e.g. by a spring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention provides an integrated electric driving device, which comprises a control module, a stator assembly, a rotor assembly, a speed reduction component, a buffer component and a box body, wherein a rotor is sleeved outside the stator assembly, a rotor shaft penetrates through the axial center line of the stator assembly and extends out of the stator assembly, and the rotor shaft is fixedly connected with the rotor; the speed reduction part comprises a screw, a helical gear and an output connecting piece, the screw is fixedly sleeved on the rotor shaft, the helical gear is meshed with the screw, and the output connecting piece covers the helical gear; the above parts are accommodated in a box body, and the box body is an integrally formed shell of the integrated electric drive device; the invention is an integrated electric driving device with small volume, light weight, high power density, good precision and low noise, and has wide application value.
Description
Technical Field
The present invention relates to drive devices, and more particularly to an integrated electric drive device.
Background
The electric driving device has the advantages of simple energy source, large speed variation range, high efficiency, high speed and position precision, is generally connected with a speed reducing device, and is widely used in mechanical automation products. In the existing electric driving device, most of the electric driving device is a brush direct current motor, the control is simple, but the power is low, the electric driving device is mainly used in a low-precision low-power robot system, in some narrow working environments, the size of the driving device needs to be made small and exquisite as much as possible, and meanwhile, the electric driving device needs to have higher precision and larger power. The existing electric driving device is generally assembled by a motor, a speed reducing mechanism, a brake, a coupling and the like, and the assembled electric driving device is not optimized in terms of volume and weight and has great improvement space in improving power density. On the other hand, the motor generates certain noise and electromagnetic interference during operation, and the reduction of the noise and the electromagnetic interference is also the performance which needs to be improved urgently by the driving device. Therefore, it is valuable to develop an electric drive device that is small, lightweight, has high power density, high accuracy, and low noise.
Disclosure of Invention
The invention provides an integrated electric driving device with small volume, light weight, high power density, good precision and low noise, wherein the stator assembly, the rotor assembly, the speed reducing component and the buffering component are integrated into a whole, so that the power density of the electric driving device is effectively improved, and the integrated electric driving device has wide application value.
The invention realizes the purpose through the following technical scheme:
an integrated electric drive comprising: the stator assembly is connected with a control module through a power line and a control line, and the control module is used for controlling the power output of the electric drive device; the rotor assembly comprises a rotor and a rotor shaft, the rotor is sleeved outside the stator assembly and rotates around the stator assembly, the rotor shaft penetrates through the axial center line of the stator assembly and extends out of the stator assembly, the rotor shaft and the stator assembly are supported by a front bearing, and the rotor shaft is fixedly connected with the rotor; the speed reducing component comprises a screw, a helical gear, an output connecting piece and an output shaft, the screw is fixedly sleeved at one end of the rotor shaft away from the stator component, the helical gear is meshed with the screw, the output connecting piece is fixedly or elastically connected to the end face of the helical gear, the output shaft is fixedly connected to the output connecting piece, and the central line of the output shaft is superposed with the axial central line of the helical gear; the box is a basic part of the integrated electric drive device, the stator assembly is fixedly connected with the box, and the bevel gear and the output connecting piece are rotationally connected with the box.
Furthermore, the speed reduction component also comprises a buffer component, and the buffer component is clamped between the helical gear and the output connecting piece and is respectively elastically connected with the helical gear and the output connecting piece.
Furthermore, a plurality of adjusting springs are arranged on the surface perpendicular to the output connecting piece, one ends of the adjusting springs are fixedly connected to the output connecting piece, the other ends of the adjusting springs are in elastic contact with the helical gears, and the width of the tooth grooves of the helical gears is gradually increased from top to bottom.
Further, a plurality of adjusting springs are arranged on the surface perpendicular to the output connecting piece, one ends of the adjusting springs are fixedly connected to the output connecting piece, the other ends of the adjusting springs are in elastic contact with the helical gear, and the width e of the tooth groove meets the following requirements:
Δ e ═ 2 · tg α · m · Δ x, where x is the coefficient of variation, α is the pressure angle, m is the modulus, Δ e is the tooth space variation, and Δ x is the coefficient of variation.
Furthermore, a plurality of spring clamping columns are uniformly arranged in the helical gear, the number of the spring clamping columns is consistent with that of the adjusting springs, and the adjusting springs are embedded into the spring clamping columns.
Furthermore, one end of the rotor shaft extending out of the stator assembly is sleeved with a rear bearing, and the outer side of the rear bearing is fixed on the inner wall of the box body.
Furthermore, an output shaft mounting hole is formed in the center of the output connecting piece, an output shaft is vertically arranged on the surface of the output connecting piece and fixed in the output shaft mounting hole, and the molded surface on the output shaft is matched with the output shaft mounting hole.
Further, an output bearing is mounted on the output shaft and used for supporting the output shaft on the inner wall of the box body.
Furthermore, the buffer part is embedded into the bevel gear and matched with the contact surface of the output connecting piece and the bevel gear, and the output connecting piece and the upper surface of the bevel gear are on the same horizontal plane after installation.
Compared with the prior art, the invention has the following beneficial effects:
1. the integrated electric driving device comprises the functions of large speed ratio speed reduction, vibration reduction of a buffering component, reverse braking of a screw rod and a bevel gear, electric driving and the like, and is compact in structure and high in power density.
2. This application adopts screw rod and helical gear combination, because gear drive's separability reduces the manufacturing degree of difficulty, and interchangeability is good.
3. The buffering component is additionally arranged in the bevel gear, a coupler of the existing electric driving device is replaced, on one hand, the impact of the device in the starting, stopping and running processes can be absorbed, and the running stability is guaranteed, and on the other hand, the buffering component is embedded in the bevel gear, so that the volume of the integrated electric driving device cannot be increased.
4. The reverse braking function of the screw and the bevel gear can ensure that the electric driving device realizes the function of keeping the load position after power failure, and the safety and reliability of work are ensured.
5. The tooth spaces of the bevel gears are designed into variable tooth spaces, the screw is not changed, and the transmission device carries out automatic clearance compensation after partial abrasion to form backlash-free transmission.
6. Compare among the prior art, helical gear hole and box contact, coefficient of friction is big, the helical gear hole and the output shaft direct contact of this application, the output shaft passes through the bearing to be supported on the box, and coefficient of friction is little.
Drawings
Fig. 1 is a schematic view of the overall structure of an integrated electric drive device of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of an integrated electric drive of embodiment 1 of the present invention;
FIG. 3 is a cross-sectional view of a screw and helical gear transmission of embodiment 1 of the invention;
FIG. 4 is a schematic structural diagram of the integrated electric drive housing of the present invention;
FIG. 5 is an exploded view of an integrated electric drive device of embodiment 2 of the present invention;
FIG. 6 is an exploded view of an integrated electric drive device of embodiment 3 of the present invention;
fig. 7 is a schematic structural view of a helical gear according to embodiment 3 of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
example 1
Fig. 1 is a schematic view of an overall structure of an integrated electric driving device according to this embodiment, and includes a control module 9, a stator assembly 1, a rotor assembly 2, a decelerating component 3, a buffering component 4, and a box 5. The control module is connected with the stator assembly through a power line 91 and a control line 92, and controls the power output of the electric drive device through a control board 93; the stator assembly includes winding coils, eliminating commutating brushes for alternating electromagnetic fields. The brush motor can rub the carbon brush to cause loss, the carbon brush needs to be replaced periodically, and the carbon brush and the coil connector lug are alternately switched on and off, so that electric sparks can be generated, electromagnetic damage is generated, and electronic equipment is interfered. The brushless direct current motor is used as a power output device, the brush is removed by the brushless direct current motor, and electric sparks generated when the brush motor runs are not generated, so that the interference of the electric sparks on remote control radio equipment is greatly reduced.
The rotor assembly 2 comprises a rotor 21 and a rotor shaft 22, the rotor is sleeved outside the stator assembly and rotates around the stator assembly, the rotor comprises a shell and permanent magnet steel, the permanent magnet steel is uniformly distributed on the inner side wall of the shell, the shell is an uncovered hollow cylindrical small box, the stator assembly is sleeved with one uncovered end cover, a rotor shaft mounting hole is formed in the center of the other bottom surface of the rotor assembly, the rotor shaft penetrates through the rotor shaft mounting hole, the axial direction of the rotor shaft is arranged on the central line of the stator assembly, the rotor shaft is sleeved into the front bearing 61 and is in tight fit with the bearing, the other end of the rotor shaft extends out of the stator assembly, and the rotor shaft is in tight fit with the rotor shell.
The speed reducing component 3 comprises a screw 31, a helical gear 32 and an output connecting piece 33, the screw is sleeved at one end of the rotor shaft extending out of the stator component, the helical gear is meshed with the screw, the output connecting piece is covered and fixedly arranged on the helical gear, the output connecting piece and the buffer component are tightly matched with each other, no relative motion exists after installation, the buffer component is embedded in the helical gear, the shape of the buffer component is matched with that of the helical gear, the surfaces of the helical gear and the output connecting piece cannot be in direct contact, most of vibration caused by rotation of the helical gear is absorbed by the buffer component, vibration and noise can be effectively reduced, an installation through hole 331 is formed in the center of the output connecting piece and used for fixing the output shaft 8 on the output connecting piece, the molded surface of the output shaft is matched with the installation through hole, the output connecting piece rotates synchronously to drive the output shaft, and is used for outputting the rotating force after speed reduction.
The buffer component 4 is clamped between the bevel gear and the output connecting piece, so that the bevel gear cannot be directly contacted with the output connecting piece, the vibration caused by the bevel gear is firstly transmitted to the buffer component, and the buffer component absorbs most of the vibration, so that the dynamic vibration transmitted to the output connecting piece is small, and the operation is stable;
the box is an integrally formed shell of the integrated electric drive device, the shape of the box is preferably a cube, and a cavity in the box is matched with the shapes of parts of the electric drive device. During installation, the front box cover 51 and the lower box cover 52 are opened, the stator assembly, the control module, the rotor assembly, the speed reduction component and the buffering component are installed in the box body, and then the front box cover 51 and the lower box cover 52 are covered. Wherein, the one end that stator module was kept away from to the rotor shaft is provided with rear bearing 62, and on the inner wall of box was embedded into to the rear bearing, with box fixed connection, can guarantee rotor shaft's even running.
The components of the present embodiment are described in further detail below with reference to the accompanying drawings.
Fig. 2 is a cross-sectional view of an integrated electric driving device according to an embodiment, in this embodiment, a housing of a rotor is a small uncovered hollow cylindrical box, and includes a bottom surface and a side wall which are integrally formed, and the bottom surface and the side wall are integrally formed by die-casting, so that the structure is simple, the processing is easy, the cost is low, and the coaxiality of the bottom surface and the side wall is ensured, so that the operation of the motor is more reliable. The other end is a through end, the shell is sleeved outside the stator assembly through the through end, the through end of the shell is fixed on the base, and the control module is arranged inside the base. The permanent magnet steel magnets are located on the outer side of the stator assembly and mounted on the inner side wall of the shell, a rotor shaft mounting hole is formed in the center of the bottom face, and the rotor shaft is in tight fit with the mounting hole.
The stator assembly and the rotor shaft are supported by front bearings, the number of the front bearings is at least 1, and when only one support bearing is arranged, the bearing is arranged at the midpoint of the axis of the stator assembly. The single bearing mode can reduce the weight of the device and simplify the structure of the device. When the volume of the integrated electric drive is small, a bearing ensures smooth operation of the rotor shaft.
The front bearings for supporting the rotor shaft and the stator assembly can be two, and comprise a first front bearing and a second front bearing, the first front bearing is arranged at one end, close to the front box cover, of the stator assembly in the axial direction, the second front bearing is arranged at one end, close to the screw rod, of the stator assembly in the axial direction, and the centers of the shaft hole, the first front bearing and the second front bearing are on the same straight line. One end of the rotor shaft sequentially penetrates through the shaft hole, the second front bearing and the first front bearing and is fixedly connected with the shaft hole, the second front bearing and the first front bearing. Wherein interference fit of first front bearing and for rotor shaft base shaft system, to being connected of second front bearing and rotor shaft, not only need consider with the firm hookup of bearing and pivot, need consider the motor again and be convenient for assemble and dismantle, fix with clearance fit and holding screw, shaft hole and rotor shaft interference fit.
In this embodiment, the other end of the rotor shaft extends out of the stator assembly and extends to the decelerating component to be connected with the screw, the rotor shaft is longer, and the length of the rotor shaft extending out of the stator assembly is not less than the length inside the stator assembly. The concentricity of rotor shaft and bearing is very important, and when the rotor drove rotor shaft one end high-speed the rotation, when the concentricity was not good, the vibrations of the other end can be very obvious, in order to make rotor shaft steady operation, at the other end of rotor shaft, keep away from stator module promptly and serve and fix with the rear bearing, the outer lane of rear bearing is fixed on the inner wall of box, the inner circle and the rotor shaft interference fit of rear bearing. The central lines of the rear bearing, the first bearing and the second bearing are overlapped, and the stable rotation of the rotor shaft is kept.
In the embodiment, the buffering component is clamped between the bevel gear and the output connecting piece, so that the vibration can be effectively reduced and the noise can be reduced. The buffer component is damping rubber, silica gel, polyethylene or polyvinyl chloride. The buffer component is a cylinder with a certain thickness, and in order to enable the buffer component to have a better vibration reduction effect, the thickness of the buffer component is 0.5-1.2 times of the thickness of the gear. Too thin buffer part damping effect can weaken, and too thick damping piece is good damping effect, but can make the helical gear volume grow, increases the cost. The shape and size of the buffer member are matched according to the output connecting member and the bevel gear, so as to avoid the direct contact between the output connecting member and the bevel gear. When the buffering component is made of damping rubber, the damping coefficient is 0.1-1.0, the rubber with the damping coefficient has a good damping effect on the helical gear rotating at high speed, and the damping effect is over 85% through tests. When the helical gear rotated, the vibration that causes directly transmitted the buffer part on, the inside macromolecule chain segment of buffer part can produce relative motion to can produce the counter-force that makes the vibration decay, and turn into heat energy with the mechanical energy that the vibration produced, and then can attenuate gradually when making the vibration transmit on the buffer part, reach the damping purpose, on the other hand is based on the springiness cushioning characteristic of buffer part, can further reduce the vibration gradually. Therefore, the vibration transmitted to the output coupling member is greatly attenuated, thereby smoothing the output power.
Further, the buffering component comprises a shaft sleeve hole 41 arranged in the center, the outer diameter of the shaft sleeve hole is consistent with the outer diameter of a shaft sleeve 322 in the center of the inner portion of the helical gear, and a plurality of limiting through holes 42 are arranged in the circumferential direction of the outer diameter of the shaft sleeve hole and are through holes which are perpendicular to the surface of the buffering component and penetrate through the buffering component.
Fig. 3 is a cross-sectional view of the screw and helical gear transmission of the present embodiment, in which the output connector includes a main body 331, a fixing post 332, and an output shaft mounting hole 333. The main body of the output connecting piece is a circular flat sheet, preferably made of metal, an output shaft mounting hole is formed in the center of the main body and used for mounting an output shaft, the shape of the output shaft mounting hole is matched with the molded surface of the top of the output shaft, and preferably is strip-shaped. The output shaft can be clamped into the output shaft mounting hole or fixedly connected in other modes. The surface of the vertical output connecting piece main body is provided with a plurality of fixing columns 332, the number of the fixing columns is at least 3, the fixing columns are evenly arranged on the same circumference of the main body plane, the outer diameter and the height of each fixing column are matched with the limiting through hole 42 of the buffering component, after the fixing columns are installed, the fixing columns are inserted into the limiting through holes, the output connecting piece is fixed onto the helical gear, and the output connecting piece, the buffering component and the helical gear form a whole and rotate synchronously.
An output bearing is arranged on the output shaft and used for supporting the output shaft on the inner wall of the box body. The inner hole of the helical gear is in direct contact with the output shaft, and the output shaft is supported on the box body through a bearing, so that the friction coefficient is small. The output bearing is preferably a rolling bearing, which reduces friction loss by changing sliding friction between the output shaft and the housing into rolling friction. The rolling bearing generally comprises four parts, namely an inner ring, an outer ring, a rolling body and a retainer, wherein the inner ring is matched with the output shaft and rotates together with the output shaft; the outer ring is matched with the box body to play a supporting role; the rolling bodies are uniformly distributed between the inner ring and the outer ring by virtue of the retainer, and the shape, size and number of the rolling bodies directly influence the service performance and service life of the rolling bearing; the retainer can enable the rolling bodies to be uniformly distributed and guide the rolling bodies to rotate to play a lubricating role. The output shaft is supported on the box body through the bearing, so that the friction force can be greatly reduced.
Example 2
Fig. 5 is an exploded view of an integrated electric driving device, which is characterized in that the gear assembly has automatic clearance compensation and buffering functions.
In this embodiment, box 5 includes front case lid 51 and lower case lid 52, has accomodate the speed reduction part in the box 5, and the speed reduction part rotates with the box to be connected, the speed reduction part includes screw rod 31, helical gear 32, output connector 33 and output shaft 8, and helical gear and screw rod mesh in the box, and the center of screw rod has linked firmly rotor shaft 22, and rotor shaft 22 is perpendicular with the axial of helical gear, and the one end of rotor shaft 22 and the interior rotor 21 fixed connection of box, rotor 21 cover are established outside stator module 1, and it rotates around stator module 1. The output connector 33 is fixedly connected on the radial surface of the helical gear, the output shaft 8 is vertically fixed at the center of the output connector and extends from the inside to the outside of the box body to be used as a power output component, wherein the control module 9 is connected with the stator assembly through a power line 91 and a control line 92, and the power output of the electric driving device is controlled through a control panel 93. Further, a buffer member 4 is interposed between the helical gear and the output link, and the buffer member 4 is elastically connected to the helical gear and the output link, respectively.
Specifically, the output connector includes a main body 331, an adjustment spring 334, and an output shaft mounting hole 333. The output connecting piece is characterized in that the main body of the output connecting piece is a circular flat sheet, an output shaft mounting hole is formed in the center of the main body, the shape of the output shaft mounting hole is matched with the profile of the top of the output shaft and used for mounting the output shaft, the output shaft is preferably in a long strip shape, and the output shaft can be clamped into the output shaft mounting hole or fixedly connected in other modes. A plurality of adjusting springs 334 are arranged on the surface perpendicular to the output connector body 331, one end of each adjusting spring is fixedly connected to the output connector, and the other end of each adjusting spring is in elastic contact with the helical gear.
Further, the buffering component comprises a shaft sleeve hole 41 arranged in the center, the outer diameter of the shaft sleeve hole is consistent with the outer diameter of a shaft sleeve in the center of the inner portion of the helical gear, and a plurality of limiting through holes 42 are arranged in the circumferential direction of the outer diameter of the shaft sleeve hole and are through holes which are perpendicular to the surface of the buffering component and penetrate through the buffering component. Further, the helical gear includes hollow cylindrical fluted disc, and the fluted disc endotheca is equipped with axle sleeve 322, evenly is provided with a plurality of spring card posts 326 between axle sleeve and fluted disc, and inside spring card post 326 inserted the spacing through-hole of buffer unit.
The surface perpendicular to the output connecting piece main body is provided with a plurality of spring supporting columns 3341, the spring supporting columns are uncovered cylindrical box bodies, the adjusting springs 334 are clamped and fixed in the spring supporting columns, and the other ends of the adjusting springs are in contact with the helical gears and can axially reciprocate along the helical gears. The adjusting springs are at least 3 and are evenly arranged on the same circumference of the plane of the main body, the outer diameter and the height of the spring supporting column are matched with the limiting through hole of the buffering component, after the adjusting springs are installed, the supporting column is inserted into the limiting through hole, the output connecting piece is fixed to the helical gear, and the output connecting piece, the buffering component and the helical gear form a whole and rotate synchronously. Therefore, the number of the limiting through holes of the buffering component is the sum of the number of the adjusting springs and the number of the clamping columns in the bevel gear. When the outer diameter of the spring supporting column is the same as that of the clamping column, a plurality of limiting through holes with the same aperture size are arranged on the buffering component. The outer diameter of the spring support column and the outer diameter of the clamping column are different, and the limiting through hole needs to be matched with the outer diameters of the spring support column and the clamping column respectively, so that the limiting through holes with different hole diameters need to be arranged at corresponding positions of the buffer component and are used for inserting the spring support column and the clamping column respectively.
Further, the width of the tooth space of the helical gear gradually increases from the upper surface 321 to the lower surface 322, and the plane passing through the axis of the screw and perpendicular to the helical gear is called a middle plane, and the meshing of the screw and the dimension in the middle plane is equivalent to the meshing of the involute gear and the rack. When the helical gear adopts a modified gear, the width e of the tooth groove 2102 is as follows: the tooth space width e satisfies:
Δ e ═ 2 · tg α · m · Δ x, where x is the coefficient of variation, α is the pressure angle, m is the modulus, Δ e is the tooth space variation, and Δ x is the coefficient of variation. From the formula, Δ e and Δ x are linear. The inclination of the tooth grooves of the helical gears is not simple drawing, but the gears are regarded as the superposition of gear sheets which are displaced layer by layer along the axial direction. Under the condition that the modulus, the tooth number and the pressure angle are not changed, the tooth profile of each layer of modified gear piece still keeps the characteristics of an involute tooth profile, and the involute equations of each layer are the sameTherefore, each layer of the modified gear piece can be correctly meshed with the equivalent rack of the screw rod on the middle plane. Assuming that the screw and the gear are in a backlash-free engagement state initially, when a clearance occurs due to wear, that is, Δ e occurs, the backlash-free engagement state can be restored as long as the gear moves by Δ x layers of the gear pieces in the axial direction.
In the embodiment, the buffering component is arranged between the helical gear and the output connecting piece in a clamping mode, so that the helical gear cannot be in direct contact with the output connecting piece, vibration caused by the helical gear is transmitted to the buffering component firstly, and most of vibration is absorbed by the buffering component.
Example 3
Fig. 6 is an exploded view of another integrated electric drive of this embodiment featuring a gear assembly with automatic clearance compensation.
In this embodiment, box 5 includes front case lid 51 and lower case lid 52, has accomodate the speed reduction part in the box 5, and the speed reduction part rotates with the box to be connected, the speed reduction part includes screw rod 31, helical gear 32, output connector 33 and output shaft 8, and helical gear and screw rod mesh in the box, and the center of screw rod has linked firmly rotor shaft 22, and rotor shaft 22 is perpendicular with the axial of helical gear, and the one end of rotor shaft 22 and the interior rotor 21 fixed connection of box, rotor 21 cover are established outside stator module 1, and it rotates around stator module 1. The output connector 33 is fixedly connected on the radial surface of the helical gear, the output shaft 8 is vertically fixed at the center of the output connector and extends from the inside to the outside of the box body, wherein the control module 9 is connected with the stator assembly 1 through a power line 91 and a control line 92, and the power output of the electric driving device is controlled through a control panel 93.
Fig. 7 is a schematic structural diagram of the helical gear according to this embodiment, the helical gear includes a hollow cylindrical toothed disc, teeth 325 are disposed on an outer surface of the toothed disc, a width between adjacent teeth is a width of the toothed groove, the width of the toothed groove gradually increases from an upper surface 321 to a lower surface 322, a shaft sleeve 323 is sleeved in the toothed disc, and a height of the shaft sleeve is the same as a height of the toothed disc, or may be slightly smaller than the height of the toothed disc. A plurality of spring clamping columns 326 are uniformly arranged between the shaft sleeve and the fluted disc, the number of the spring clamping columns is consistent with that of the adjusting springs, and the adjusting springs are embedded into the spring clamping columns.
Further, the plane through the axis of the screw perpendicular to the helical gear is called the median plane, and the meshing of the screw and the dimension in the median plane is equivalent to the meshing of the involute gear and the rack. When the helical gear adopts a modified gear, the tooth space width e satisfies the following conditions:
Δ e ═ 2 · tg α · m · Δ x, where x is the coefficient of variation, α is the pressure angle, m is the modulus, Δ e is the tooth space variation, and Δ x is the coefficient of variation. From the formula, Δ e and Δ x are linear.
The inclination of the tooth grooves of the helical gears is not simple drawing, but the gears are regarded as the superposition of gear sheets which are displaced layer by layer along the axial direction. Under the condition that the modulus, the tooth number and the pressure angle are not changed, the tooth profile of each layer of modified gear piece still keeps the characteristics of an involute tooth profile, and the involute equations of each layer are the same, so that each layer of modified gear piece can be correctly meshed with the equivalent rack of the screw on the middle plane. Assuming that the screw and the gear are in a backlash-free engagement state initially, when a clearance occurs due to wear, that is, Δ e occurs, the backlash-free engagement state can be restored as long as the gear moves by Δ x layers of the gear pieces in the axial direction.
Further, the helical gear 32 and the output connecting member 33 are tightly fitted with each other, and there is no relative movement after installation, an output shaft mounting hole 333 is provided at the center of the output connecting member for fixing the output shaft to the output connecting member, the profile of the output shaft is matched with the output shaft mounting hole, and the rotation of the output connecting member drives the output shaft to synchronously rotate for outputting the rotation force after deceleration.
In this embodiment, the output connector includes a main body 331, a spring support post 3341, and an output shaft mounting hole 333. The main body of the output connecting piece is a circular flat sheet, an output shaft mounting hole is formed in the center of the main body and used for mounting an output shaft 8, the shape of the output shaft mounting hole is matched with the profile of the top of the output shaft, and the output shaft can be clamped into the output shaft mounting hole or fixedly connected in other modes. The surface perpendicular to the output connecting piece main body is provided with a plurality of spring supporting columns 41, the spring supporting columns are uncovered cylindrical box bodies, the adjusting springs 4 are clamped and fixed in the spring supporting columns, and the other ends of the adjusting springs are in contact with the helical gears and can axially reciprocate along the helical gears. The adjusting springs are at least 3 and are evenly arranged on the same circumference of the plane of the main body, the outer diameter and the height of the spring supporting column are matched with the limiting through hole of the buffering component, after the adjusting springs are installed, the supporting column is inserted into the limiting through hole, the output connecting piece is fixed to the helical gear, and the output connecting piece, the buffering component and the helical gear form a whole and rotate synchronously.
The embodiment is another integrated electric driving device, and is characterized in that the gear assembly has an automatic clearance compensation function.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. An integrated electric drive, comprising:
the stator assembly is connected with a control module through a power line and a control line, and the control module is used for controlling the power output of the electric drive device;
the rotor assembly comprises a rotor and a rotor shaft, the rotor is sleeved outside the stator assembly and rotates around the stator assembly, the rotor shaft penetrates through the axial center line of the stator assembly and extends out of the stator assembly, the rotor shaft and the stator assembly are supported by a front bearing, and the rotor shaft is fixedly connected with the rotor;
the speed reducing component comprises a screw, a helical gear, an output connecting piece and an output shaft, the screw is fixedly sleeved at one end of the rotor shaft away from the stator component, the helical gear is meshed with the screw, the output connecting piece is fixedly or elastically connected to the end face of the helical gear, the output shaft is fixedly connected to the output connecting piece, and the central line of the output shaft is superposed with the axial central line of the helical gear;
the box is a basic part of the integrated electric drive device, the stator assembly is fixedly connected with the box, and the bevel gear and the output connecting piece are rotationally connected with the box.
2. The integrated electric drive device according to claim 1, wherein said decelerating member further comprises a buffer member interposed between said helical gear and said output connecting member, and elastically connected to said helical gear and said output connecting member, respectively.
3. The integrated electric drive device according to claim 2, wherein a plurality of adjustment springs are disposed perpendicularly to the surface of said output link, one end of said adjustment springs is fixedly connected to the output link, and the other end thereof is in elastic contact with said helical gear, and the width of the tooth space of said helical gear is gradually increased from top to bottom.
4. The integrated electric drive device according to claim 1, wherein a plurality of adjusting springs are disposed perpendicular to the surface of the output connecting member, one end of each adjusting spring is fixedly connected to the output connecting member, the other end of each adjusting spring is in elastic contact with the helical gear, and the width e of the tooth groove of the helical gear satisfies:
，
wherein x is a displacement coefficient, alpha is a pressure angle, m is a modulus, delta e is a tooth space variation, and delta x is a displacement coefficient variation.
5. The integrated electric drive device according to claim 4, wherein a plurality of spring clamping columns are uniformly arranged in the helical gear, the number of the spring clamping columns is consistent with the number of the adjusting springs, and the adjusting springs are embedded in the spring clamping columns.
6. The integrated electric drive of claim 1 wherein an end of said rotor shaft extending outside said stator assembly is sleeved with a rear bearing, an outer side of said rear bearing being secured to an inner wall of said housing.
7. The integrated electric drive of claim 1 wherein said output link is centrally provided with an output shaft mounting aperture, and an output shaft is provided perpendicular to a surface of said output link and secured in said output shaft mounting aperture, said output shaft having a profile matching said output shaft mounting aperture.
8. The integrated electric drive of claim 1 wherein said output shaft has an output bearing mounted thereon for supporting said output shaft on an inner wall of a housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150266.6A CN114499038A (en) | 2020-10-23 | 2020-10-23 | Integrated electric driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150266.6A CN114499038A (en) | 2020-10-23 | 2020-10-23 | Integrated electric driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114499038A true CN114499038A (en) | 2022-05-13 |
Family
ID=81470749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011150266.6A Pending CN114499038A (en) | 2020-10-23 | 2020-10-23 | Integrated electric driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114499038A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525029U (en) * | 1991-09-10 | 1993-04-02 | 株式会社三ツ葉電機製作所 | Speed reducer for electrical components |
| US5267482A (en) * | 1991-06-21 | 1993-12-07 | Mitsuba Electric Manufacturing Co., Ltd. | Speed reducing device for electrical equipment |
| KR20020048186A (en) * | 2000-12-16 | 2002-06-22 | 김민박,라이문트하이넨 | Multi-damping structure for the driver of power window motor |
| CN101568747A (en) * | 2006-12-22 | 2009-10-28 | 马渊马达株式会社 | Motor with reduction gear |
| CN107404184A (en) * | 2016-05-20 | 2017-11-28 | 德昌电机(深圳)有限公司 | Drive mechanism and the window regulator device using the drive mechanism |
| CN207475346U (en) * | 2017-11-08 | 2018-06-08 | 重庆百转电动汽车电控***有限责任公司 | The arrangement of motor and retarder |
| CN213661358U (en) * | 2020-10-23 | 2021-07-09 | 杭州中致高智能科技有限公司 | Integrated electric driving device |
-
2020
- 2020-10-23 CN CN202011150266.6A patent/CN114499038A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267482A (en) * | 1991-06-21 | 1993-12-07 | Mitsuba Electric Manufacturing Co., Ltd. | Speed reducing device for electrical equipment |
| JPH0525029U (en) * | 1991-09-10 | 1993-04-02 | 株式会社三ツ葉電機製作所 | Speed reducer for electrical components |
| KR20020048186A (en) * | 2000-12-16 | 2002-06-22 | 김민박,라이문트하이넨 | Multi-damping structure for the driver of power window motor |
| CN101568747A (en) * | 2006-12-22 | 2009-10-28 | 马渊马达株式会社 | Motor with reduction gear |
| CN107404184A (en) * | 2016-05-20 | 2017-11-28 | 德昌电机(深圳)有限公司 | Drive mechanism and the window regulator device using the drive mechanism |
| CN207475346U (en) * | 2017-11-08 | 2018-06-08 | 重庆百转电动汽车电控***有限责任公司 | The arrangement of motor and retarder |
| CN213661358U (en) * | 2020-10-23 | 2021-07-09 | 杭州中致高智能科技有限公司 | Integrated electric driving device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100708916B1 (en) | Electric Actuator | |
| JPH11122866A (en) | Actuator | |
| US20030085628A1 (en) | Electric rotating machine | |
| CN213661358U (en) | Integrated electric driving device | |
| KR100873662B1 (en) | Supporter of shaft using permanent magnet | |
| US6595889B2 (en) | Belt-type door opening and closing drive apparatus | |
| CN109114173B (en) | Speed reducer with power source | |
| CN110666836A (en) | Arm integrated joint for bidirectional output humanoid robot | |
| US5445247A (en) | Damping unit | |
| CN114499038A (en) | Integrated electric driving device | |
| JP2016017535A (en) | Suspension device | |
| CN1147983C (en) | Shock reducing method for small motor and bearing shock reducing ring thereof | |
| CN217458628U (en) | Screw lifting mechanism | |
| CN219788393U (en) | Robot joint and robot | |
| CN211709355U (en) | Arm integrated joint for bidirectional output humanoid robot | |
| CN114043455A (en) | Small-size industrial desktop mechanical arm and base, robot thereof | |
| CN214499950U (en) | Reduction gearbox with automatic clearance compensation and buffering functions | |
| CN112297744A (en) | Energy feedback type suspension and vehicle | |
| CN212297448U (en) | Low-noise planetary gear motor | |
| CN213655633U (en) | Reduction gearbox with automatic clearance compensation function | |
| JP2979952B2 (en) | Ball screw device | |
| CN213661359U (en) | Electric push rod | |
| CN101363526B (en) | Damping device for dynamoelectric precision transmission system | |
| JP2020083029A (en) | Vehicle height adjustment device | |
| CN218456370U (en) | Screw motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |