CN109973610A - A kind of linear actuators - Google Patents
A kind of linear actuators Download PDFInfo
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- CN109973610A CN109973610A CN201910331023.3A CN201910331023A CN109973610A CN 109973610 A CN109973610 A CN 109973610A CN 201910331023 A CN201910331023 A CN 201910331023A CN 109973610 A CN109973610 A CN 109973610A
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- gear
- linear actuators
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- primary speed
- spring
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- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 230000009467 reduction Effects 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- 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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating 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
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Gear Transmission (AREA)
Abstract
The present invention provides a kind of linear actuators, including gear reduction mechanism, the gear reduction mechanism includes power driving part, the power driving part has power output shaft, there is teeth portion on the power output shaft, it further include deceleration support, at least two primary speed-down gears, the at least two primary speed-downs gear engages connection with the teeth portion respectively, and at least two primary speed-downs gear is rotationally connected with respectively on the deceleration support, the deceleration support is configured with rotary shaft far from the side of the power driving part, the free end of the rotary shaft is connected with shaft coupling, the shaft coupling is connect with double-reduction gear.A kind of linear actuators of the invention, torque transmission capability is stronger, running stability gets a promotion, and structure is more compact.
Description
Technical field
The invention belongs to linear actuators technical fields, and in particular to a kind of linear actuators.
Background technique
Linear actuators is also known as electric pushrod, is widely used in the fields such as household, medical treatment, vehicle, solar power generation,
Primary structure includes driving motor, gear reduction mechanism, screw rod, nut etc., specifically, the driving motor drives the transmission
And deceleration mechanism, and then the screw rod rotation is driven, the screw rod of rotation is able to drive nut and finally realizes straight reciprocating motion, preceding
The nut stated generally is connected as one with interior tube body, namely realizes the telescopic moving of interior tube body.And gear reduction mechanism therein
Mostly by the way of planetary gear and multiple reduction gearing engaged transmission, this simple kind of drive engaged using gear
Transmit torque it is low it is relatively low, space layout is not compact enough.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that providing a kind of linear actuators, torque transmission capability is stronger, transports
Row stationarity gets a promotion, and structure is more compact.
To solve the above-mentioned problems, the present invention provides a kind of linear actuators, including gear reduction mechanism, and the transmission subtracts
Fast mechanism includes power driving part, and the power driving part has power output shaft, has tooth on the power output shaft
Portion, further includes deceleration support, at least two primary speed-down gears, and at least two primary speed-downs gear is nibbled with the teeth portion respectively
Connection is closed, and at least two primary speed-downs gear is rotationally connected with respectively on the deceleration support, the deceleration support is far from institute
The side for stating power driving part is configured with rotary shaft, and the free end of the rotary shaft is connected with shaft coupling, the shaft coupling with
Double-reduction gear connection.
Preferably, at least two primary speed-downs gear is all helical gear, and the tooth in the teeth portion is helical teeth.
Preferably, at least two primary speed-downs gear is symmetrical about the power output shaft.
Preferably, the linear actuators further includes support frame, and installation through-hole, the transmission are configured on support frame as described above
Deceleration mechanism is arranged in the installation through-hole and support frame as described above is fixedly connected with the power driving part, and the installation is logical
There is ring gear, the ring gear is engaged with the primary speed-down gear on the inner wall in hole.
Preferably, splined hole is configured on the free end of the rotary shaft, the shaft coupling passes through the splined hole and institute
Deceleration support is stated to be fixedly connected.
Preferably, the double-reduction gear is set in the periphery of the rotary shaft, and the double-reduction gear and institute
Stating has gap between rotary shaft, the side of the double-reduction gear towards the shaft coupling is configured with the first protrusion, described
Shaft coupling is configured with the second protrusion towards the double-reduction gear side, when rotary shaft rotation, first protrusion
It is mutually abutted with second protrusion.
It preferably, is first step structure towards the side of second protrusion in first protrusion, described second is convex
Playing the upper side towards first protrusion is second step structure, the first step structure and the second step structure energy
Enough correspond to each other grafting.
Preferably, rolling bearing is equipped in the gap.
Preferably, the linear actuators further includes torsional spring, sleeve, and the torsional spring is spiral and is sheathed on the gap
The first spring foot and the second spring foot interior, that the torsional spring has overbending direction opposite, the first spring foot and the second spring foot point
Other places are opposite when generating between first protrusion and second protrusion between first protrusion and second protrusion
Circumferential movement when, the first spring foot and/or the second spring foot can be oppressed, so make the torsional spring diameter reduce or increase
Greatly, the sleeve covers at the radial outside of the torsional spring.
Preferably, the linear actuators further include move back and forth component, the reciprocatings motion component include screw rod, outside
Pipe is connected between one end of the screw rod and the outer tube by thrust ball bearing with flat seat.
A kind of linear actuators provided by the invention, since at least two primary speed-downs gear is that the power is defeated
It while shaft engages, is also rotatablely connected with deceleration support, at this time it is understood that when power output shaft driving rotation
When, on the one hand the primary speed-down gear will revolve around the power output shaft, on the other hand then surround itself and the deceleration
The drive-connecting shaft rotation of frame, it is defeated using at least two primary speed-down gears progress retarding powers while realizing power output
Out, transmission capacity that is more steady and improving torque；In addition, by least two level-one by the way of the deceleration support
The power of reduction gearing is transmitted along the axially extending direction of the power output shaft, is effectively overcome in traditional transmission mechanism
Multi-gear be engaged with each other brought by huge structure deficiency, even if also the structure of the linear actuators is more compact.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of the linear actuators of the embodiment of the present invention；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the schematic perspective view of the gear reduction mechanism of the linear actuators of the embodiment of the present invention；
Fig. 4 is the schematic diagram of internal structure of the gear reduction mechanism of the linear actuators of the embodiment of the present invention；
Fig. 5 is that the stereochemical structure of the deceleration support and primary speed-down gear combination in the linear actuators of the embodiment of the present invention is shown
It is intended to；
Fig. 6 is the schematic perspective view of the rotary shaft in the linear actuators of the embodiment of the present invention；
Fig. 7 is the schematic perspective view of the shaft coupling in the linear actuators of the embodiment of the present invention；
Fig. 8 is the schematic perspective view of gear reduction mechanism in the linear actuators of an embodiment of the present invention.
Appended drawing reference indicates are as follows:
1, power driving part；11, power output shaft；12, teeth portion；2, primary speed-down gear；21, coaxial primary speed-down tooth
Wheel；3, deceleration support；31, rotary shaft；32, splined hole；4, shaft coupling；41, the second protrusion；5, double-reduction gear；51, first is convex
It rises；6, support frame；62, ring gear；7, torsional spring；8, sleeve；100, cabinet；201, screw rod；202, nut；203, inner tube；204,
Outer tube；205, thrust ball bearing with flat seat；206, axle sleeve；207, locking nut；208, end connector.
Specific embodiment
In conjunction with referring to shown in Fig. 1 to Fig. 8, according to an embodiment of the invention, providing a kind of linear actuators, including cabinet
100, gear reduction mechanism, reciprocating motion component, the cabinet 100 form an organic whole with the reciprocating motion component,
The gear reduction mechanism is in the cabinet 100, and the gear reduction mechanism includes power driving part 1, the power
Driving part 1 has power output shaft 11, has teeth portion 12 on the power output shaft 11, further includes deceleration support 3, at least two
Primary speed-down gear 2, at least two primary speed-downs gear 2 engage connection, and described at least two with the teeth portion 12 respectively
A primary speed-down gear 2 is rotationally connected with respectively on the deceleration support 3, specifically, for example described at least two primary speed-downs tooth
Wheel 2 is respectively pivoted on the deceleration support 3, and the deceleration support 3 is configured with rotary shaft far from the side of the power driving part 1
31, the free end of the rotary shaft 31 is connected with shaft coupling 4, and the shaft coupling 4 is connect with double-reduction gear 5, described reciprocal
Moving parts include screw rod 201 and are sheathed on 201 top nut 202 of screw rod, and the nut 202 is fixed on one with inner tube 203
Body, the double-reduction gear 5 are engaged with downstream drive gear, and finally realize that the rotation to the screw rod 201 drives, rotation
Screw rod 201 finally said inner tube 203 is driven to generate straight reciprocating motion, the power by the nut 202 thereon
The rotary motion driving device such as can use motor, hydraulic pump of driving part 1.In the technical solution, due to it is described at least
While two primary speed-down gears 2 are the power output shaft 11 engagement, also it is rotatablely connected with deceleration support 3, it at this time can be with
Understand, when the power output shaft 11, which drives, to be rotated, 2 one side of primary speed-down gear will be defeated around the power
Shaft 11 revolves, and on the other hand then surrounds the drive-connecting shaft rotation of itself and the deceleration support 3, uses while realizing power output
At least two primary speed-down gears 2 carry out retarding power output, transmission capacity that is more steady and improving torque；Separately
Outside, by the way of the deceleration support 3 by the power of at least two primary speed-downs gear 2 along the power output shaft 11
The transmission of axially extending direction, effectively overcome the multi-gear in traditional transmission mechanism and be engaged with each other brought huge structure
Deficiency, even if also the structure of the linear actuators is more compact.It is noted that the rotary shaft 31 in the present invention
It is removably connected to the side of the deceleration support 3, is attached for example, by using flat mouth mode.
Preferably, at least two primary speed-downs gear 2 is all helical gear, and the tooth in the teeth portion 12 is helical teeth,
By the way of helical teeth engagement, keep the transmission of the gear reduction structure more steady, this advantageously reduces described linear activated
The operation noise of device, simultaneously because helical gear tooth form overlapdegree of engage is bigger, this be can be effectively reduced during gear reduction
Gear load improves the bearing capacity of gear.
In order to guarantee the power output shaft 11 rotation axis stability, it is preferable that at least two level-one subtracts
Fast gear 2 is symmetrical about the power output shaft 11, and the symmetrical primary speed-down gear 2 can be by the power
Output shaft 11 is more reliably limited on rotation axis, best, and the primary speed-down gear 2 is 3,3 level-ones
Reduction gearing 2 is symmetrically distributed in the circumferential direction of the power output shaft 11.
The embodiment more having as one kind, it is preferable that the linear actuators further includes support frame 6, support frame as described above 6
On be configured with installation through-hole (not shown), the gear reduction mechanism is arranged in the installation through-hole and support frame as described above
6 are fixedly connected with the power driving part 1, have ring gear 62 on the inner wall of the installation through-hole, the ring gear 62 with
The primary speed-down gear 2 engages.The ring gear 62 is at least partly engaged with the primary speed-down gear 2, with formation pair
The motion guide of at least two primary speed-downs gear 2, it is to be understood that this mode has determined the deceleration support 3
Specific location, it is even more important that the ring gear 62 carries out the power output shaft 11 by the primary speed-down gear 2
Positioning prevents the problem of power output shaft 11 for axle center caused by cantilever position as deviating.Further, with it is described
Primary speed-down gear 2 is coaxially arranged with coaxial primary speed-down gear 21 (as shown in figs. 4 and 5), in this case at this time same
Axis primary speed-down gear 21 and 62 tooth engagement of ring gear.
The rotary shaft 31 can be connect in several ways with the shaft coupling 4, such as by pin joint, bolt etc., most
Alright, splined hole 32 is configured on the free end of the rotary shaft 31, the shaft coupling 4 is subtracted by the splined hole 32 with described
Fast frame 3 is fixedly connected, and this mode can greatly facilitate the assembling process of shaft coupling 4, certainly, be more reliably, in institute
It states after shaft coupling 4 and the rotary shaft 31 connect by splined hole 32, it can also be using the necessary reinforcement of corresponding bolt progress
Connection.
In order to advanced optimize the structure of the linear actuators, specifically, reducing the cabinet 100 as far as possible in silk
Length on 201 length direction of bar, it is preferable that the double-reduction gear 5 is set in the periphery of the rotary shaft 31, and described
Between double-reduction gear 5 and the rotary shaft 31 have gap, the double-reduction gear 5 towards the shaft coupling 4 one
Side structure has the first protrusion 51, and the shaft coupling 4 is configured with the second protrusion 41 towards 5 side of double-reduction gear, works as institute
When stating the rotation of rotary shaft 31, first protrusion 51 is mutually abutted with second protrusion 41, and rolling can be set in the gap
Dynamic bearing.In the technical solution, due to having gap between the double-reduction gear 5 and the rotary shaft 31, described
The rotation of double-reduction gear 5 is fully relied in the abutting of first protrusion 51 and second protrusion 41, specifically, working as institute
When stating the first protrusion 51 and abutting with described second raised 41, the power driving part 1 will drive the double-reduction gear 5 to revolve
Turn, otherwise the double-reduction gear 5 does not rotate.In first protrusion 51 towards the side of second protrusion 41 be first
Step structure towards the side of first protrusion 51 is second step structure, the first step in second protrusion 41
Structure and the second step structure can correspond to each other grafting.
Preferably, the linear actuators further includes torsional spring 7, sleeve 8, and the torsional spring 7 is spiral and is sheathed on described
In gap, the first spring foot (not shown) and the second spring foot (not shown) that the torsional spring 7 has overbending direction opposite,
The first spring foot and the second spring foot are respectively between first protrusion 51 and second protrusion 41, when described the
Between one protrusion 51 and second protrusion 41 when generating opposite circumferential movement, the first spring foot and/or the can be oppressed
Two spring feet, and then the diameter of the torsional spring 7 is made to reduce or increase, the sleeve 8 covers at the radial outside of the torsional spring 7.
In this way, the torsional spring 7 passes through first protrusion 51 and described second raised 41 pairs of the first spring feet and/or the second spring foot
Force realizes braking or the conversion of non-brake state, specifically, when the first spring foot and/or the second spring foot born it is outer
When power direction is identical, the diameter of the torsional spring 7 will increase, and the torsional spring 7 that diameter increases will contact abutting with the inner wall of the sleeve 8
And then the frictional force for forming frictional force, and being formed will realize the braking effect of the linear actuators；Conversely, working as first spring
When the external force direction that foot and/or the second spring foot are born is opposite, the diameter of the torsional spring 7 will reduce, and the torsional spring 7 that diameter reduces will
It is detached from the inner wall of the sleeve 8, and then realizes the effect of the releasing braking of the linear actuators.
The linear actuators further includes outer tube 204, and said inner tube 203 is plugged in the outer tube 204, the screw rod
It is connected between 201 one end and the outer tube 204 by thrust ball bearing with flat seat 205, it is to be understood that described one end and institute
The tail end for stating outer tube 204 is corresponding, and the front end of the outer tube 204 is then the extension end for said inner tube 203.Using described
The bigger axial force that thrust ball bearing with flat seat 205 can carry, and then its service life is improved, extend maintenance cycle, and
The push-pull effort that the screw rod 201 can be met using the single thrust ball bearing with flat seat, greatly reduces corresponding site
Installation space demand and the manufacturing cost for reducing product.The thrust ball bearing with flat seat 205 and the screw rod 201 and outer tube 204
Specific installation approach can according to concrete condition determine, be preferably carried out mode, an end cap of the screw rod 201 as one kind
Equipped with axle sleeve 206, the corresponding shaft shoulder is configured on the axle sleeve 206, a side end face of the thrust ball bearing with flat seat 205 contradicts
It is connected on the shaft shoulder, the end point of the screw rod 201 is also connected with locking nut 207, and the locking nut 207, which contradicts, to be connected
It connects on another side end face of the thrust ball bearing with flat seat 205, while a side end face of end connector 208 is pushed away with the plane
Another side end face of power ball bearing 205 abuts.When the screw rod 201 is by thrust, the axle sleeve 206 squeezes described flat after being pressurized
Face thrust ball bearing 205, the 208 loading bearing pressure of end connector, when the screw rod 201 is by pulling force, the locking screw
Power is reached the thrust ball bearing with flat seat 205, the end connector 208 carries corresponding pulling force by pulling force by mother 207.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (10)
1. a kind of linear actuators, including gear reduction mechanism, which is characterized in that the gear reduction mechanism includes power drive
Component (1), the power driving part (1) have power output shaft (11), have teeth portion on the power output shaft (11)
It (12), further include deceleration support (3), at least two primary speed-down gears (2), at least two primary speed-downs gear (2) is respectively
Connection is engaged with the teeth portion (12), and at least two primary speed-downs gear (2) is rotationally connected with the deceleration support respectively
(3) on, the deceleration support (3) is configured with rotary shaft (31), the rotary shaft far from the side of the power driving part (1)
(31) free end is connected with shaft coupling (4), and the shaft coupling (4) connect with double-reduction gear (5).
2. linear actuators according to claim 1, which is characterized in that at least two primary speed-downs gear (2) is all
For helical gear, and the tooth in the teeth portion (12) is helical teeth.
3. linear actuators according to claim 1, which is characterized in that at least two primary speed-downs gear (2) is closed
It is symmetrical in the power output shaft (11).
4. linear actuators according to claim 3, which is characterized in that further include support frame (6), support frame as described above (6)
On be configured with installation through-hole, the gear reduction mechanism is arranged in the installation through-hole and support frame as described above (6) and described dynamic
Driven part (1) is fixedly connected, on the inner wall of the installation through-hole have ring gear (62), the ring gear (62) with it is described
Primary speed-down gear (2) engagement.
5. linear actuators according to claim 1, which is characterized in that be configured on the free end of the rotary shaft (31)
Splined hole (32), the shaft coupling (4) are fixedly connected by the splined hole (32) with the deceleration support (3).
6. linear actuators according to claim 5, which is characterized in that the double-reduction gear (5) is set in described
The periphery of rotary shaft (31), and there is gap between the double-reduction gear (5) and the rotary shaft (31), the second level subtracts
The side of fast gear (5) towards the shaft coupling (4) is configured with first raised (51), and the shaft coupling (4) is towards the second level
Reduction gearing (5) side is configured with second raised (41), when the rotary shaft (31) rotation, described first raised (51) and institute
Second raised (41) are stated mutually to abut.
7. linear actuators according to claim 6, which is characterized in that towards described second on described first raised (51)
The side of raised (41) is first step structure, towards the side of described first raised (51) is the on described second raised (41)
Two step structures, the first step structure and the second step structure can correspond to each other grafting.
8. linear actuators according to claim 6, which is characterized in that be equipped with rolling bearing in the gap.
9. linear actuators according to claim 6, which is characterized in that further include torsional spring (7), sleeve (8), the torsional spring
(7) the first spring foot and the second spring spiral and be sheathed in the gap, that the torsional spring (7) has overbending direction opposite
Foot, the first spring foot and the second spring foot are respectively between described first raised (51) and second raised (41),
When generating opposite circumferential movement between described first raised (51) and second raised (41), described first can be oppressed
Spring foot and/or the second spring foot, and then the diameter of the torsional spring (7) is made to reduce or increase, the sleeve (8) covers at the torsion
The radial outside of spring (7).
10. linear actuators according to claim 9, which is characterized in that further include moving back and forth component, the reciprocal fortune
Dynamic component includes screw rod (201), outer tube (204), passes through plane between one end and the outer tube (204) of the screw rod (201)
Thrust ball bearing (205) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910331023.3A CN109973610A (en) | 2019-04-24 | 2019-04-24 | A kind of linear actuators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910331023.3A CN109973610A (en) | 2019-04-24 | 2019-04-24 | A kind of linear actuators |
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| Publication Number | Publication Date |
|---|---|
| CN109973610A true CN109973610A (en) | 2019-07-05 |
Family
ID=67086004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910331023.3A Pending CN109973610A (en) | 2019-04-24 | 2019-04-24 | A kind of linear actuators |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109973610A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234879A (en) * | 2020-10-28 | 2021-01-15 | 浙江佳乐科仪股份有限公司 | Emergency stop device of permanent magnet synchronous motor |
| CN112664633A (en) * | 2020-12-11 | 2021-04-16 | 北京自动化控制设备研究所 | High-power dual-redundancy linear output electric actuating mechanism |
| US20230135910A1 (en) * | 2021-10-28 | 2023-05-04 | Motiomax Oy | Configurable seamless shift gearbox and electromechanical system |
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| CN112234879A (en) * | 2020-10-28 | 2021-01-15 | 浙江佳乐科仪股份有限公司 | Emergency stop device of permanent magnet synchronous motor |
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| CN112664633A (en) * | 2020-12-11 | 2021-04-16 | 北京自动化控制设备研究所 | High-power dual-redundancy linear output electric actuating mechanism |
| US20230135910A1 (en) * | 2021-10-28 | 2023-05-04 | Motiomax Oy | Configurable seamless shift gearbox and electromechanical system |
| US11815164B2 (en) * | 2021-10-28 | 2023-11-14 | Norrhydro Oy | Configurable seamless shift gearbox and electromechanical system |
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