CN2598237Y - Electric linear drive - Google Patents
Electric linear drive Download PDFInfo
- Publication number
- CN2598237Y CN2598237Y CNU032281110U CN03228111U CN2598237Y CN 2598237 Y CN2598237 Y CN 2598237Y CN U032281110 U CNU032281110 U CN U032281110U CN 03228111 U CN03228111 U CN 03228111U CN 2598237 Y CN2598237 Y CN 2598237Y
- Authority
- CN
- China
- Prior art keywords
- turbine
- linear telescopic
- straight line
- line driver
- shell
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses an electric linear driver, which belongs to a performing apparatus for linear alternating motion, and comprises a direct current permanent magnetism type electromotor, a worm and worm wheel reducing mechanism, a linear stretching mechanism with a screw rod and a driving nut, a protecting device for the journey of the linear extending mechanism, a linear extending displacement sensor and a shell. Wherein, the worm and an output axis of the electromotor are integral, and the screw rod and the worm wheel are connected movably. The utility model has the advantages of compact structure, small volume, good safety and reliability, low working noises, and convenient speed regulation and controlling, thus the utilty model can be used directly for mechanical facilities needing adjustment of ascent and descent and pitching, particularly suitable for medical equipments.
Description
Technical field
The utility model relates to a kind of execution apparatus of straight reciprocating motion, particularly a kind of electrodynamic type straight line driver of doing straight line push-and-pull campaign with motor driven.
Technical background
The execution apparatus of existing straight reciprocating motion is an electric pushrod, the linear telescopic mechanism that it mainly converts the linear reciprocation stretching motion to by motor, the reducing gear that is connected with motor output shaft, with rotatablely moving of reducing gear output and they are dressed up unitary housing form.Chinese patent CN2315706 patent specification has been done open in detail to the electric pushrod of said structure.
Yet this class electric pushrod is owing to adopt the cylindrical gear reducer structure, and its volume is bigger, and gearratio is less, and the point-to-point speed of output is bigger, and noise is higher; Gear reduction itself does not have auto-lock function, safety inadequately again; If need less point-to-point speed, generally to increase the logarithm of travelling gear, complex structure, manufacturing cost increases.In addition, it adopts alternating current motor, and directly with 220 volts of civil power work, fail safe is not high enough.Therefore this class electric pushrod is unsuitable at operating table, makes lifting, pitch regulation usefulness on the medical apparatus and instruments such as operating chair.
Summary of the invention
The utility model technical issues that need to address are to overcome the deficiencies in the prior art, provide a kind of security reliability good, and operating noise is low, and volume is little, and the point-to-point speed of output is lower, are convenient to the electrodynamic type straight line driver of speed governing and control again.
Technical solution of the present utility model is: the electrodynamic type straight line driver that is provided, it comprises: a motor, a reducing gear, a linear telescopic mechanism that contains screw mandrel and transmission nut, stroke protective device excessively and a shell to linear telescopic constitutes, and described motor adopts the direct current permanent magnetic motor; Described reducing gear comprises a scroll bar, a turbine that meshes with scroll bar, and described scroll bar and described direct current permanent magnetic motor output shaft are integral, and are flexible connection between described turbine and the described screw mandrel; This electrodynamic type straight line driver also comprises the displacement transducer that can measure, set linear telescopic mechanism linear telescopic amount.
The external cylindrical surface of described turbine hub tightens and is with the spring that a damping is used, and an end of this spring is a free end, and the spring wire head of its other end is fixed on the shell.When the rotation direction of turbine and spring free end around when consistent, the internal diameter of spring further dwindles, the resistance of turbine rotation increases, thereby has improved the fail safe when linear telescopic mechanism shrinks.
Described linear telescopic amount displacement transducer have be fixed on the turbine by many to magnetic pole heteropolarity circumferential arrangement a magnetic ring body and be contained in magneto sensor close on the shell with magnetic ring body.When magnetic ring body during with turbine rotation, magneto sensor is under each the magnetic pole effect close with it on the magnetic ring body, exportable series of pulses signal, by the pulse signal of gathering is handled, the displacement that can measure or set the elongation of linear telescopic mechanism or shrink, thus flexible displacement is controlled and regulated.
The utility model compared with prior art has the following advantages and technique effect.
(1) the utility model is owing to adopt the turbine worm reducing gear, and its gearratio is big, can reach 100: 1, makes it compact integral structure, and volume is little, and the transmission noise is low, and linear movement output speed is less, and has self-locking effect preferably, and is safe and reliable.
(2) motor adopts the direct current permanent magnetic motor, and operating voltage is low, and fail safe is good, and is convenient to speed governing, commutation control.
(3) because turbine is provided with damping spring, it can make linear telescopic mechanism the time be subjected to big damping force at retraction, as in jacking equipment, using, and the fail safe in the time of can the landing of raising equipment.
(4) flexibly connect because of adopting between turbine and screw mandrel, when linear telescopic mechanism transships or is hit, can play the effect of protection reducing gear and motor.
(5) owing between turbine and shell, be provided with a linear telescopic amount displacement transducer, can carry out displacement control and adjusting to the elongation and the contraction of linear telescopic mechanism by external controller, easy to use, accurate.
Concrete structure of the present utility model is provided by the following drawings.
Description of drawings
Fig. 1 is the structural representation of the utility model electrodynamic type straight line driver.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is elaborated.
Fig. 1 is a kind of embodiment of the present utility model.As shown in Figure 1, electrodynamic type straight line driver has " L " shape shell 5, and it is synthetic by the moulding of two basic symmetries.Has a direct current permanent magnetic motor 33 in the shell; one comprises scroll bar 31 and the reducing gear that constitutes with the turbine 25 of scroll bar engagement; a linear telescopic mechanism 7; device of crossing the stroke protection to linear telescopic; wherein scroll bar 31 is all one with the output shaft 32 of motor 33, and turbine 25 is enclosed within on the bearing axle 29 that is connected with motor 33.On shell 5, be equipped with outwardly directed on equipment, connecting the ears shape connector 30 that uses.
Linear telescopic mechanism 7 has a screw mandrel 6, bearing 20 on the screw mandrel 6 is fixed on the shell 5, a transmission nut 14 is arranged on the screw mandrel 6, what be connected with transmission nut 14 is enclosed within a adapter sleeve 13 on the screw mandrel 6, this adapter sleeve 13 elevating lever 2 outer with being enclosed within screw mandrel fixedlyed connected, this adapter sleeve 13 also is slidingly matched with a sleeve pipe 3 that is enclosed within outside the elevating lever 2, is provided with the seal 4 that contacts with sleeve pipe in the shell 5 on sleeve pipe 3 tops, enters in the housing to stop foreign material.The end opening of sleeve pipe 3 is provided with a shelves ring 15.When screw mandrel 6 rotated, elevating lever 2 can be along the axial stretching of sleeve pipe 3 by the screw thread pair transmission of transmission nut 14.The end that elevating lever 2 exposes shell has for the connecting hole 1 that usefulness is installed on equipment.
The joint 21 that key connects is housed on one end of screw mandrel 6, on this joint 21 splined shaft 22 is arranged, on the turbine 25 with joint 21 on the corresponding position of splined shaft 22 have its size, the corresponding splined hole 24 of shape, splined shaft 22 is positioned at the splined hole 24 on the turbine 25, and the spline that forms 25 of screw mandrel 6 and turbines flexibly connects.When linear telescopic mechanism transshipped or is hit, reducing gear, motor can be effectively protected in the flexible connection between this screw mandrel and turbine.
Cross the stroke protective device and have a ring washer 10 that is located on sleeve pipe 3 outer walls; a spring 9 that is enclosed within outside the sleeve pipe 3 is respectively arranged in the both sides of ring washer 10; 11 contact with ring washer 10; each spring 9 or 11 the other end contact with the supporting bracket 8 or 12 of shell 5 disjunctors respectively; whereby, make linear telescopic mechanism when flexible stroke excessively, obtain buffering.In the shell 5 on sleeve pipe 3 sides a two-pass switch 18 is housed, this two-pass switch 18 is electrically connected with motor 33.On sleeve pipe 3 bottom outer walls, an arcwall face 16 is arranged, can contact with two buttons 17,19 on the two-pass switch 18.When linear telescopic mechanism flexible cross stroke cause sleeve pipe 3 vertically by on when moving or moving down; arcwall face 16 on the sleeve pipe 3 can loosen or oppress the relevant button of travel switch 18; cut off the electric current of motor under this state, thereby the parts of electrodynamic type straight line driver are protected.
As shown in Figure 1, linear telescopic amount displacement transducer 27 has the magnetic ring body 26 that is bonded on turbine 25 end faces, and this magnetic ring body is made of eight pairs of magnet steel, arranges (not shown) along the circumference heteropolarity, a magneto sensor 28 is housed on shell 5, and the magnetic pole of it and magnetic ring body is close.Magneto sensor is a tongue tube, or is coil, or is Hall element.When magnetic ring body 26 rotates with turbine 25, the magnetic line of force of each magnetic pole on the magnetic ring body acts on tongue tube, tongue tube two closings of contact, disconnection are repeated, or when acting on coil, produce alternating potential at the coil two ends, or when acting on Hall element, at the Hall element output alternating voltage appears.The pulse signal of these alternations can be measured the displacement of the elongation or the contraction of linear telescopic mechanism 7 through external controller collection and processing, thereby can control and regulate the flexible of linear telescopic mechanism whereby, has higher precision.
Tighten at the external cylindrical surface of turbine 25 wheel hubs and to be with a damping spring 23, the cross section of damping spring silk is a rectangle, and an end of this damping spring 23 is a free end, and its other end spring wire head is fixed on the shell 5.When the rotation of turbine 25 therewith spring 23 free ends around to unanimity the time, spring rely on the turbine external cylindrical surface on contact generation frictional force, spring inside diameter is dwindled, frictional force further increases, the resistance that turbine 25 rotates increases, thereby has improved the fail safe of linear telescopic mechanism 7 when shrinking.When the rotation of turbine 25 and spring free end around when opposite, spring is released, contact friction force reduces, the resistance of turbine rotation reduces greatly.
The electrodynamic type straight line driver of said structure, safe and reliable, operating noise is low, compact conformation is convenient to speed governing and control, and is easy to use, be suitable for doing the application in machine equipments of lifting, pitch regulation, be suitable for doing in the Medical Devices such as operating table, operation table lifting, pitch regulation application especially.
Claims (5)
1, a kind of electrodynamic type straight line driver, it comprises: a motor (33), a reducing gear, a linear telescopic mechanism (7) that contains screw mandrel (6) and transmission nut (14), one linear telescopic is crossed stroke protective device and shell (5) and constitute, it is characterized in that: described motor (33) is a dc permanent magnet motor; Described reducing gear comprises a scroll bar (31), a turbine (25) that meshes with scroll bar, and described scroll bar (31) is integral with described dc permanent magnet motor (33) output shaft (32), is flexible connection between described screw mandrel (6) and the described turbine (25); This electrodynamic type straight line driver also comprises a displacement transducer (27) to the linear telescopic amount of linear telescopic mechanism.
2, electrodynamic type straight line driver according to claim 1 is characterized in that: described screw mandrel (6) is that spline is connected with flexible connection between the described turbine (25).
3, electrodynamic type straight line driver according to claim 1 and 2, it is characterized in that: the external cylindrical surface of described turbine (25) wheel hub tightens and is with a damping spring (23), one end of this damping spring is a free end, and the spring wire head of its other end is fixed on the shell (5).
4, electrodynamic type straight line driver according to claim 1 and 2 is characterized in that: described linear telescopic amount displacement transducer (27) has and is fixed on the magnetic pole heteropolarity is arranged in the magnetic ring body (26) on the circumference and is contained in that shell (5) is gone up and the close magneto sensor (28) of magnetic ring body (26) by many on the turbine (25).
5, electrodynamic type straight line driver according to claim 3 is characterized in that: described linear telescopic amount displacement transducer (27) has and is fixed on the magnetic pole heteropolarity is arranged in the magnetic ring body (26) on the circumference and is contained in a magneto sensor (28) close with magnetic ring body on the shell by many on the turbine (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032281110U CN2598237Y (en) | 2003-01-10 | 2003-01-10 | Electric linear drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032281110U CN2598237Y (en) | 2003-01-10 | 2003-01-10 | Electric linear drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2598237Y true CN2598237Y (en) | 2004-01-07 |
Family
ID=34164147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032281110U Expired - Fee Related CN2598237Y (en) | 2003-01-10 | 2003-01-10 | Electric linear drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2598237Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104224325A (en) * | 2014-10-11 | 2014-12-24 | 天津工业大学 | Steel wire rope transmitting linear telescopic mechanism for minimally-invasive surgery robot |
| CN111188895A (en) * | 2020-03-02 | 2020-05-22 | 广东格兰仕集团有限公司 | Sensing assembly, driving device and working method thereof |
| CN117227381A (en) * | 2023-11-08 | 2023-12-15 | 宁波拓普集团股份有限公司 | Linear driving type active suspension system |
| CN117261518A (en) * | 2023-11-09 | 2023-12-22 | 宁波拓普集团股份有限公司 | Electric control type active suspension system |
-
2003
- 2003-01-10 CN CNU032281110U patent/CN2598237Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104224325A (en) * | 2014-10-11 | 2014-12-24 | 天津工业大学 | Steel wire rope transmitting linear telescopic mechanism for minimally-invasive surgery robot |
| CN111188895A (en) * | 2020-03-02 | 2020-05-22 | 广东格兰仕集团有限公司 | Sensing assembly, driving device and working method thereof |
| CN117227381A (en) * | 2023-11-08 | 2023-12-15 | 宁波拓普集团股份有限公司 | Linear driving type active suspension system |
| CN117227381B (en) * | 2023-11-08 | 2024-03-19 | 宁波拓普集团股份有限公司 | Linear driving type active suspension system |
| CN117261518A (en) * | 2023-11-09 | 2023-12-22 | 宁波拓普集团股份有限公司 | Electric control type active suspension system |
| CN117261518B (en) * | 2023-11-09 | 2024-03-15 | 宁波拓普集团股份有限公司 | Electric control type active suspension system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040107 Termination date: 20110110 |