CN201902525U - High-load linear actuator - Google Patents
High-load linear actuator Download PDFInfo
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- CN201902525U CN201902525U CN2010206978763U CN201020697876U CN201902525U CN 201902525 U CN201902525 U CN 201902525U CN 2010206978763 U CN2010206978763 U CN 2010206978763U CN 201020697876 U CN201020697876 U CN 201020697876U CN 201902525 U CN201902525 U CN 201902525U
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- linear actuators
- high load
- worm gear
- worm
- driving screw
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Abstract
The utility model discloses a high-load linear actuator, which comprises a driving mechanism, a worm, a worm gear assembly, a leading screw, a telescopic pipe and an outer pipe. The driving mechanism includes an engine base and a motor, the engine base is provided with a supporting part and a placing part, and the motor is fixed at the supporting part; the worm extends into the supporting part from the motor; the worm gear assembly includes a worm gear and two bearings, and the worm gear is supported at the placing part through the two bearings and is meshed with the two bearings for transmission; the leading screw is connected with the worm gear in a penetrating manner and is actuated by the motor to rotate; the telescopic pipe jackets the leading screw and is bolted with the leading screw; the outer pipe jackets the telescopic pipe; and the telescopic pipe is driven through the rotation of the leading screw to move linearly and telescopically relative to the outer pipe. Therefore, the linear actuator can be used on high-load medical equipment due to the stable supporting effect.
Description
Technical field
The utility model relates to a kind of actuator, relates in particular to a kind of high load-carrying linear actuators that is used for equipment such as medical equipment, electrically propelled chair.
Background technique
Along with the affluence of expanding economy and society, the compatriots a large amount of high nutrition of picked-up and food materials of high heat aspect diet, and compatriots' ensemble average body weight constantly is enhanced; Be subjected to the influence of previous reasons, be engaged in the manufacturer of equipment such as medical equipment or electrically propelled chair, must innovate improvement at the linear actuators that is widely used in aforementioned device (Linear Actuator), continue to produce or design the product that conforms with the market demand.
Linear actuators mainly was to utilize driven units such as motor collocation worm screw and worm gear to drive the driving screw rotation in the past, ordered about the telescopic pipe that is spirally connected thereon by driving screw simultaneously to do the linear action of stretching out or withdrawing; So, to be combined into a linear actuators.
Because traditional linear actuators configuration structure only can be used on the medical equipment of low load-carrying, for the required high load-carrying linear actuators in market, because of the Security load consider and working life problem, can't satisfy the interim product demand of linear actuators.In addition, be used for the linear actuators of high Load-Carrying Equipment, the speed of its telescopic pipe in the withdrawal process also is to have influence on problems such as comfort level that the user uses and Security, and it all is to wait to be improved to overcome.
The model utility content
A purpose of the present utility model is to provide a kind of high load-carrying linear actuators, and it is the configuration structure with driving mechanism and Worm-gear assembly, can be applied on the equipment of high load-carrying to form firm supporting role.
To achieve the above object, the utility model provides a kind of high load-carrying linear actuators, comprising:
One driving mechanism, comprise a support and can produce a motor of clockwise and anticlockwise, this support has a carrier and an arrangement portion, this carrier comprises a pedestal and a hollow barrel mast of this pedestal elongation moulding certainly, this arrangement portion comprises a ring body that is connected this hollow barrel mast, and this motor is fixed on this pedestal;
One worm screw protrudes out and penetrates in this hollow barrel mast from this motor;
One Worm-gear assembly comprises a worm gear and jointly this worm gear is bearing in two bearings of this ring body inside, the transmission that is meshing with each other of this worm gear and this worm screw;
One driving screw, this worm gear of cross-under also is subjected to the actuating of this motor and produces rotation;
One telescopic pipe, it is outside and be spirally connected mutually with this driving screw to be set in this driving screw; And
One outer tube is socketed in this telescopic pipe outside, and this telescopic pipe is subjected to the rotation of this driving screw to drive and move relative to this outer tube generation linear extendible.
Above-mentioned high load-carrying linear actuators, wherein, this arrangement portion also comprises a cover plate that is fixed in this ring body side, this ring body and this hollow barrel mast part that is formed in one.
Above-mentioned high load-carrying linear actuators, wherein, this worm gear has the annular flank of tooth and a hollow mandrel that is connected this annular flank of tooth with this worm meshing transmission, be formed with a front containing slot and a rear containing groove between this annular flank of tooth and hollow mandrel, this two bearing housing is connected on the two ends of this hollow mandrel and is installed with respectively in this front containing slot and rear containing groove.
Above-mentioned high load-carrying linear actuators, wherein, the outer periphery of this two bearing expose the outside of this annular flank of tooth respectively, the inboard of this ring body is formed with a backward step, this cover plate is being formed with a front step to a side that should ring body, and the exposed part of this two bearing is bearing in this front step and this backward step respectively.
Above-mentioned high load-carrying linear actuators wherein, also comprises a back support mechanism, and this back support mechanism comprises two and half covers and by the common folder of this 2 half cover institute fixing ball bearing of pulling, this ball bearing supplies this driving screw cross-under arrangement.
Above-mentioned high load-carrying linear actuators wherein, also comprises a reduction gearing mechanism, and this reduction gearing mechanism is socketed in this driving screw and between this back support mechanism and this Worm-gear assembly.
Above-mentioned high load-carrying linear actuators, wherein, also comprise a reduction gearing mechanism, this reduction gearing mechanism comprises a follower, a dog collar, a passive axle sleeve, a plurality of needle roller, intermediary ring and a torque spring, this this driving screw of follower socket and this worm gear of cross-under, this this follower of dog collar socket with this worm gear and the synchronous interlock of this follower, this driven axle cover this driving screw of socket and cross-under are in this dog collar, these a plurality of needle roller cross-under are between this passive axle sleeve and this intermediary ring, and this torque spring is tightened the outer periphery of this intermediary's ring with elastic force.
Above-mentioned high load-carrying linear actuators, wherein, this worm gear is provided with a plurality of internal tooths, and this follower forms a plurality of external tooths that cooperatively interact and fix with these a plurality of internal tooths, and this dog collar also is provided with a plurality of draw-in grooves that fix mutually with these a plurality of external tooths.
Above-mentioned high load-carrying linear actuators, wherein, this dog collar forms a plurality of pawl arms, between any two adjacent these pawl arms, be formed with an interval trough, these passive axle sleeve outer periphery are extended with a plurality of raised lines, be formed with a groove between any two adjacent these raised lines, this needle roller is contained in this interval trough and this groove and is enclosed to form in the space, and these a plurality of needle rollers by this intermediary encircle enclose and establish.
Above-mentioned high load-carrying linear actuators, wherein, this driving screw has an outside fix plane, and this driven axle is arranged with an interior plane of orientation that fixes mutually with this outside fix plane.
Above-mentioned high load-carrying linear actuators wherein, also comprises a shell, and this shell is coated on this driving mechanism and this reduction gearing mechanism outside, and puts for a side cross-under of this outer tube.
Above-mentioned high load-carrying linear actuators wherein, also comprises an electric unit, and this electric unit is provided in the inside of this shell and is positioned at a side of this motor.
The utility model also has following effect, with the Combination Design of support and Worm-gear assembly, not only can promote worm gear and be supported in steadiness in the ring body, and the process of assembling and maintenance all because of be simplified shorten tear open, the group time.By the setting of reduction gearing mechanism, utilize the rubbing action of each needle roller and intermediary ring, so that driving screw is hindered and can reach decelerating effect in the rotation of specific direction.Utilize intermediary's ring to rotate easily, make the transmission usefulness of driving mechanism good in torque spring inside.During stressed counter the pushing away of driving screw, can make intermediary's ring, each needle roller, passive axle sleeve and driving screw all not produce relative transmission situation, be fixed firmly, and can prevent effectively that the sliding certainly of driving screw and nut from producing to make driving screw.Frictional force between each transmitting assemblies is to increase along with the increase of load, there is not unnecessary frictional force to produce when therefore unloaded and consumed energy not, and the retraction speed of telescopic pipe is roughly the same under different loads, the situation that therefore can remain on constant airspeed descends, and improves user's use comfortable feel.Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 the utility model linear actuators combination appearance figure;
Fig. 2 driving mechanism of the present utility model and Worm-gear assembly three-dimensional exploded view;
Fig. 3 is another visual angle figure of Fig. 2;
Fig. 4 is each assemblying sectional view of Fig. 2;
The three-dimensional exploded view of Fig. 5 the utility model linear actuators;
Fig. 6 reduction gearing mechanism three-dimensional exploded view of the present utility model;
Fig. 7 reduction gearing mechanism assembled sectional view of the present utility model;
The combination schematic representation of Fig. 8 the utility model linear actuators;
Fig. 9 the utility model linear actuators assembled sectional view.
Wherein, reference character
10... driving mechanism
11... support 111... carrier
112... pedestal 113... hollow barrel mast
115... the circular ring body of the 116... of arrangement portion
1161... backward step 117... cover plate
1171... front step 12... motor
20... worm screw
30... Worm-gear assembly
31... the worm gear 311... annular flank of tooth
312... hollow mandrel 313... front containing slot
314... rear containing groove 315... internal tooth
32... fore bearing 33... rear bearing
40... driving screw
41... threaded section 42... circular shaft section
421... outside fix plane
50... telescopic pipe
51... body 52... nut
521... abaculus
60... outer tube
61... groove
65... back support mechanism
651... partly cover the 652... ball bearing
653... slot
70... reduction gearing mechanism
71... follower 711... external tooth
72... dog collar 721... draw-in groove
722... pawl arm 723... interval trough
73... passive axle sleeve 731... inner plane
732... raised line 733... groove
74... needle roller 75... intermediary ring
76... torque spring 761... positioning section
77... spacing door
80... shell
90... electric unit
Embodiment
Relevant detailed description of the present utility model and technology contents, conjunction with figs. is described as follows, however appended accompanying drawing only provides reference and explanation usefulness, is not to be used for the utility model is limited.
See also shown in Figure 1, the utility model provides a kind of high load-carrying linear actuators, this actuator is mainly used in hundreds of kilograms or the load more than thousand kilograms, comprises a driving mechanism 10, a worm screw 20, a Worm-gear assembly 30, a driving screw 40, a telescopic pipe 50 (as shown in Figure 8) and an outer tube 60.
See also Fig. 2 to shown in Figure 4, driving mechanism 10 comprises a support 11 and can produce a motor 12 of clockwise and anticlockwise, support 11 has a carrier 111 and an arrangement portion 115, carrier 111 is constituted by a tabular pedestal 112 with from the hollow barrel mast 113 that pedestal 112 extends upward moulding, motor 12 be by screw (scheming not shown) locking below pedestal 112.Arrangement portion 115 comprises a circular ring body 116 and a cover plate 117, and circular ring body 116 constitutes for one with pedestal 112 and hollow barrel mast 113.Be formed with a backward step 1161 in addition in the inboard of circular ring body 116; 117 of cover plates are that cover plate 117 also is formed with a front step 1171 (as shown in Figure 3) in a side of the circular ring body 116 of correspondence by the side of screw (scheming not shown) locking at circular ring body 116.
Worm-gear assembly 30 comprises a worm gear 31, a fore bearing 32 and a rear bearing 33, worm gear 31 has an annular flank of tooth 311 and a hollow mandrel 312 that is connected the annular flank of tooth 311, between the annular flank of tooth 311 and hollow mandrel 312, be formed with forward and backward tank 313,314, in addition the rear side at hollow mandrel 312 forms an internal gear 315 (as shown in Figure 3), and the annular flank of tooth 311 is and the transmission that is meshing with each other of aforementioned worm screw 20.Consult Fig. 4, fore bearing 32 is socketed in hollow mandrel 312 and is installed with in front containing slot 313, and a part of zone of fore bearing 32 outer periphery is the outsides that expose the annular flank of tooth 311, and the exposed region of this fore bearing 32 is to be fixed in the front step 1171 of cover plate 117; In like manner, rear bearing 33 also is socketed in hollow mandrel 312 and is installed with in rear containing groove 314, and a part of zone of rear bearing 33 outer periphery is the outsides that expose the annular flank of tooth 311; The exposed region of this rear bearing 33 is to be fixed in the backward step 1161 of circular ring body 116; So, with in the circular ring body 116 and cover plate 117 that worm gear 31 are supported on jointly arrangement portion 115.
See also shown in Figure 5, the circular shaft section 42 that driving screw 40 has a threaded section 41 and extends from threaded section 41, be provided with an outside fix plane 421 in circular shaft section 42 away from an end of threaded section 41, one end of driving screw 40 is that cross-under is in the hollow mandrel 312 of aforementioned worm gear 31 (as shown in Figure 9), the other end then stretches out towards the direction away from support 11, and this driving screw 40 is to drive worm screw 20 and drive worm gear 31 with motor 12 to produce spinning movement.
Linear actuators of the present utility model also comprises a back support mechanism 65 (as shown in Figure 5), it mainly comprises two and half covers 651 and by 651 common fixing ball bearings 652 of pulling that press from both sides of 2 half covers, this ball bearing 652 is to settle for aforementioned driving screw 40 terminal cross-under; So, can more improve the dynamic stability of doing of driving screw 40 and telescopic pipe 50.Junction point at 2 half covers 651 offers a slot 653 in addition.
See also Figure 6 and Figure 7, linear actuators of the present utility model also comprises a reduction gearing mechanism 70, it is to be socketed in aforementioned driving screw 40 and between back support mechanism 65 and Worm-gear assembly 30, this reduction gearing mechanism 70 mainly comprises a follower 71, a dog collar 72, one passive axle sleeve 73, a plurality of needle roller 74, intermediary ring 75, one torque spring 76 and a spacing door 77; Follower 71 is circular shaft section 42 positions that are socketed in driving screw 40, and it has a plurality of external tooths 711 of the internal tooth 315 of a part of cross-under worm gear 31; Dog collar 72 is provided with a plurality of draw-in grooves 721 that fix mutually with aforementioned external tooth 711, and this dog collar 72 forms a plurality of pawl arms 722, and is formed with an interval trough 723 between the in office two adjacent pawl arms 722.
See also Fig. 8 and shown in Figure 9, linear actuators of the present utility model also comprises a shell 80, and this shell 80 is coated on driving mechanism 10 and reduction gearing mechanism 70 outsides, and comes cross-under to put for 65 supportings of back support mechanism and for a side of outer tube 60.
In addition, linear actuators of the present utility model also comprises an electric unit 90 (as shown in Figure 1), and it is a lateral location that is provided in the inside of shell 80 and is positioned at aforementioned electric motivation 12.
See also Fig. 8, be subjected to worm screw 20 positive direction actuation and do clockwise direction when rotation when worm gear 31 during use, that is to say drive telescopic pipe 50 inside retraction outer tubes 60 inside of driving screw 40; See also Fig. 7, each pawl arm 722 will promote intermediary's ring 75 and each needle roller 74 rotates, rotation direction with torque spring 76 is identical with worm gear 31 sense of rotation, and its positioning section 761 is fixed on the slot 653 interior (as shown in Figure 5) of half cover 651, and the clip stop that makes the 76 pairs of intermediaries of torque spring ring 75 produce tightening (be intermediary's ring 75 hugged and can not rotate), the frictional force that makes each pawl arm 722 drive each needle roller 74 and intermediary's ring 75 increases, and reduces driving screw 40 rotational speeies; So, when this linear actuators is installed in beddo or chair, can make the speed of telescopic pipe 50 retraction outer tubes 60 inside comparatively slow, to increase user's comfort.
When worm gear 31 is subjected to worm screw 20 reverse direction actuation and when doing counterclockwise to rotate, that is to say that driving screw 40 drives telescopic pipes 50 protruding outer tubes 60 outsides; The continuous Fig. 7 that sees also, each pawl arm 722 will promote intermediary's ring 75 and each needle roller 74 rotates, because the rotation direction of torque spring 76 is opposite with worm gear 31 sense of rotation, torque spring 76 will produce releasing orientation because intermediary encircles 75 rotation, frictional damping is little between intermediary's ring 75, torque spring 76 and each needle roller 74 at this moment, and intermediary's ring 75 can be rotated easily in torque spring 76 inside; So, can make the transmission usefulness of internal mechanism good.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (13)
1. one kind high load-carrying linear actuators is characterized in that, comprising:
One driving mechanism, comprise a support and can produce a motor of clockwise and anticlockwise, this support has a carrier and an arrangement portion, this carrier comprises a pedestal and a hollow barrel mast of this pedestal elongation moulding certainly, this arrangement portion comprises a ring body that is connected this hollow barrel mast, and this motor is fixed on this pedestal;
One worm screw protrudes out and penetrates in this hollow barrel mast from this motor;
One Worm-gear assembly comprises a worm gear and jointly this worm gear is bearing in two bearings of this ring body inside, the transmission that is meshing with each other of this worm gear and this worm screw;
One driving screw, this worm gear of cross-under also is subjected to the actuating of this motor and produces rotation;
One telescopic pipe, it is outside and be spirally connected mutually with this driving screw to be set in this driving screw; And
One outer tube is socketed in this telescopic pipe outside, and this telescopic pipe is subjected to the rotation of this driving screw to drive and move relative to this outer tube generation linear extendible.
2. high load-carrying linear actuators according to claim 1 is characterized in that this arrangement portion also comprises a cover plate that is fixed in this ring body side, this ring body and this hollow barrel mast part that is formed in one.
3. high load-carrying linear actuators according to claim 2, it is characterized in that, this worm gear has the annular flank of tooth and a hollow mandrel that is connected this annular flank of tooth with this worm meshing transmission, be formed with a front containing slot and a rear containing groove between this annular flank of tooth and hollow mandrel, this two bearing housing is connected on the two ends of this hollow mandrel and is installed with respectively in this front containing slot and rear containing groove.
4. high load-carrying linear actuators according to claim 3, it is characterized in that, the outer periphery of this two bearing expose the outside of this annular flank of tooth respectively, the inboard of this ring body is formed with a backward step, this cover plate is being formed with a front step to a side that should ring body, and the exposed part of this two bearing is bearing in this front step and this backward step respectively.
5. high load-carrying linear actuators according to claim 1, it is characterized in that, this worm gear has the annular flank of tooth and a hollow mandrel that is connected this annular flank of tooth with this worm meshing transmission, be formed with a front containing slot and a rear containing groove between this annular flank of tooth and hollow mandrel, this two bearing housing is connected on the two ends of this hollow mandrel and is installed with respectively in this front containing slot and rear containing groove.
6. high load-carrying linear actuators according to claim 1, it is characterized in that, also comprise a back support mechanism, this back support mechanism comprises two and half covers and by the common folder of this 2 half cover institute fixing ball bearing of pulling, this ball bearing supplies this driving screw cross-under arrangement.
7. high load-carrying linear actuators according to claim 6 is characterized in that, also comprises a reduction gearing mechanism, and this reduction gearing mechanism is socketed in this driving screw and between this back support mechanism and this Worm-gear assembly.
8. high load-carrying linear actuators according to claim 1, it is characterized in that, also comprise a reduction gearing mechanism, this reduction gearing mechanism comprises a follower, one dog collar, one passive axle sleeve, a plurality of needle rollers, an one intermediary ring and a torque spring, this this driving screw of follower socket and this worm gear of cross-under, this this follower of dog collar socket with this worm gear and the synchronous interlock of this follower, this driven axle cover this driving screw of socket and cross-under are in this dog collar, these a plurality of needle roller cross-under are between this passive axle sleeve and this intermediary ring, and this torque spring is tightened the outer periphery of this intermediary's ring with elastic force.
9. high load-carrying linear actuators according to claim 8, it is characterized in that, this worm gear is provided with a plurality of internal tooths, and this follower forms a plurality of external tooths that cooperatively interact and fix with these a plurality of internal tooths, and this dog collar also is provided with a plurality of draw-in grooves that fix mutually with these a plurality of external tooths.
10. high load-carrying linear actuators according to claim 8, it is characterized in that, this dog collar forms a plurality of pawl arms, between any two adjacent these pawl arms, be formed with an interval trough, these passive axle sleeve outer periphery are extended with a plurality of raised lines, be formed with a groove between any two adjacent these raised lines, this needle roller is contained in this interval trough and this groove and is enclosed to form in the space, and these a plurality of needle rollers by this intermediary encircle enclose and establish.
11. high load-carrying linear actuators according to claim 8 is characterized in that this driving screw has an outside fix plane, this driven axle is arranged with an interior plane of orientation that fixes mutually with this outside fix plane.
12. high load-carrying linear actuators according to claim 8 is characterized in that, also comprises a shell, this shell is coated on this driving mechanism and this reduction gearing mechanism outside, and puts for a side cross-under of this outer tube.
13. high load-carrying linear actuators according to claim 12 is characterized in that, also comprises an electric unit, this electric unit is provided in the inside of this shell and is positioned at a side of this motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206978763U CN201902525U (en) | 2010-12-24 | 2010-12-24 | High-load linear actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206978763U CN201902525U (en) | 2010-12-24 | 2010-12-24 | High-load linear actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201902525U true CN201902525U (en) | 2011-07-20 |
Family
ID=44273120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206978763U Expired - Fee Related CN201902525U (en) | 2010-12-24 | 2010-12-24 | High-load linear actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201902525U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562992A (en) * | 2010-12-24 | 2012-07-11 | 第一传动科技股份有限公司 | High-load linear actuator |
| US8733192B2 (en) | 2011-03-11 | 2014-05-27 | Timotion Technology Co., Ltd. | High-load linear actuator |
| CN106402338A (en) * | 2015-07-29 | 2017-02-15 | 斯凯孚公司 | Linear driver |
| ES2611585A1 (en) * | 2016-09-23 | 2017-05-09 | Hooks Tania Verdu, S.L. | Tension system with quick drive (Machine-translation by Google Translate, not legally binding) |
-
2010
- 2010-12-24 CN CN2010206978763U patent/CN201902525U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562992A (en) * | 2010-12-24 | 2012-07-11 | 第一传动科技股份有限公司 | High-load linear actuator |
| CN102562992B (en) * | 2010-12-24 | 2014-07-16 | 第一传动科技股份有限公司 | High-load linear actuator |
| US8733192B2 (en) | 2011-03-11 | 2014-05-27 | Timotion Technology Co., Ltd. | High-load linear actuator |
| CN106402338A (en) * | 2015-07-29 | 2017-02-15 | 斯凯孚公司 | Linear driver |
| ES2611585A1 (en) * | 2016-09-23 | 2017-05-09 | Hooks Tania Verdu, S.L. | Tension system with quick drive (Machine-translation by Google Translate, not legally binding) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20161224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |