CN104135108A - Electric cylinder with buffer - Google Patents

Electric cylinder with buffer Download PDF

Info

Publication number
CN104135108A
CN104135108A CN201410376618.8A CN201410376618A CN104135108A CN 104135108 A CN104135108 A CN 104135108A CN 201410376618 A CN201410376618 A CN 201410376618A CN 104135108 A CN104135108 A CN 104135108A
Authority
CN
China
Prior art keywords
cylinder
buffer
electric cylinder
nut
cushion block
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.)
Granted
Application number
CN201410376618.8A
Other languages
Chinese (zh)
Other versions
CN104135108B (en
Inventor
刘艳强
程泓勋
王健珅
孙亚鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beihang University
Original Assignee
Beihang University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beihang University filed Critical Beihang University
Priority to CN201410376618.8A priority Critical patent/CN104135108B/en
Publication of CN104135108A publication Critical patent/CN104135108A/en
Application granted granted Critical
Publication of CN104135108B publication Critical patent/CN104135108B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to an electric cylinder with a buffer. The electric cylinder is composed of a lead screw integrated with a motor rotor, an angular contact ball bearing, a first annular thrust cushion block, a second annular thrust cushion block, a long bolt, an electric cylinder upper barrel, a motor stator, a spline, an encoder, an end cover, a thread ball, a nut barrel, a check ring, an electric cylinder body, a piston ring, a buffer inner barrel, a buffer outer barrel, a sealing washer, a baffle ring, an annular cushion block, a rigid spring and a bracket. The motor rotor is integrated with the lead screw, the lead screw serves as the motor stator end to be supported to the interior of the electric cylinder upper barrel through the angular contact ball bearing, and extends into the electric cylinder upper barrel to be matched with the motor stator to form a motor, and the first annular thrust cushion block and the second annular thrust cushion block are installed at the two ends of the motor stator respectively; the threaded end of the lead screw and the nut barrel form an electric cylinder transmission device through the thread ball, and the electric cylinder transmission device is contained in the nut barrel and the electric cylinder body. The instant impact load effect of the electric cylinder in the starting process, the impact process and the like is reduced, and the service life of the electric cylinder is effectively prolonged.

Description

A kind of electric cylinder with buffer
Technical field:
The present invention relates to a kind of electric cylinder with buffer, can be applicable to the occasions such as Linear transmission, heavy duty, high-frequency impact.Belong to mechanical transmissioning technology field.
Background technology:
Electric cylinder is a kind of linear motion device that motor and leading screw is concentrated on to one, have that transmission accuracy is high, response rapidly, the advantage such as noise is little, contamination resistance is strong, and have to be connected with control circuit and more easily realize the advantage of high-precision motion control.Because the advantage of electric cylinder is numerous, its application is more and more broader, such as fields such as industrial processes, Aero-Space, robot, emulation apparatus, medical machineries, the complexity of electric cylinder condition of work is also increasing simultaneously with it, in some fields, non-stationary rectilinear motion in the electric cylinder course of work, the effects such as power that withstand shocks of electric cylinder push rod, in undercarriage, in aircraft landing process, be applied to electric cylinder in the undercarriage load that withstands shocks.Low frequency shock loading can affect electric cylinder stressed member performance, reduces the useful life of electric cylinder; High-frequency percussion can cause electric cylinder stressed member to lose efficacy, and causes electric cylinder fault, in some important one-tenth rivers, likely causes imponderable loss.
Summary of the invention:
1, object: the object of this invention is to provide a kind of electric cylinder with buffer, it has overcome the deficiencies in the prior art, it is a kind of electric cylinder with pooling feature, when withstanding shocks, can reduce the impact of shock loading on electric cylinder performance, solved in the use limitation problem of load place electric cylinder that withstands shocks, the useful life of having improved electric cylinder.
2, technical scheme: a kind of electric cylinder with buffer of the present invention, it by and the integrated screw mandrel of rotor, angular contact ball bearing, annular thrust cushion block 1,2, stay bolt, electric cylinder top cylinder, motor stator, spline, encoder, end cap, screw thread ball, nut cylinder, back-up ring, electric cylinder cylinder body, piston ring, buffer inner core, buffer urceolus, seal washer, baffle ring, annular cushion block, stiffness spring and bracket forms, position annexation between them is:
Motor stator by spline in electric cylinder top cylinder inner periphery direction spline, rotor and leading screw are integrated, leading screw is supported in electric cylinder top cylinder by angular contact ball bearing as motor stator end, stretch into electric cylinder top cylinder and motor stator mix proportion motor, motor stator and rotor are contained in the common drive part that forms electric cylinder in electric cylinder top cylinder.Annular thrust pad piece 1,2 is installed at motor stator two ends, and annular thrust cushion block 1,2 is outer is along the circumferential direction equipped with through hole, and annular thrust cushion block 1,2 is fastening by bolt and electric cylinder top cylinder.Threads of lead screw end forms electric cylinder transmission device by screw thread roller and nut cylinder and is contained in nut cylinder and electric cylinder cylinder body; Buffer inner core and nut jacket casing connect, buffer urceolus and the socket of electric cylinder cylinder body; Buffer inner core and buffer urceolus link together by seal washer, double-screw bolt and bolt.
Described leading screw 1 is the threaded stairstepping major axis in one end, leading screw and rotor are integrated, lead screw shaft one end is stepped, the other end is processed with screw thread, ladder axle head and rotor adopt and are press-fitted method assembling, stretch in the motor being contained in electric cylinder top cylinder, by angular contact ball bearing, supported, output shaft as motor, the end of thread of leading screw is the leading screw in drive mechanism, leading screw and the engagement of screw thread roller, leading screw rotates and drives screw thread roller to rotate, and drives nut cylinder moving linearly in drive mechanism;
Described angular contact ball bearing 2 is commercial that chooses as required;
Described annular thrust cushion block 1, the 2nd, revolution cylindrical member, annular thrust cushion block outer lug boss part external diameter is identical with electric cylinder top cylinder, mounting portion external diameter is identical with electric cylinder top cylinder internal diameter, annular thrust cushion block outer lug boss is partly equipped with through hole, lead to the hole site is identical with end cap and electric cylinder top cylinder hole site, annular thrust cushion block 2 one end contact with end cap, one end contacts with motor stator, fastening by stay bolt, play the effect of fixed electrical machinery stator, angular contact ball bearing is installed on annular thrust cushion block 1, in 2, annular thrust cushion block 1, the axial motion of 2 internal boss restriction leading screws, prevent leading screw axial endplay when carrying, annular thrust cushion block 1, in the time of must guaranteeing electric cylinder carrying, there is not damage inactivation in 2 internal boss thickness.
Described stay bolt 5 is commercial that chooses as required;
Described electric cylinder top cylinder 6 is the cylindrical member that have predetermined wall thickness, and electric cylinder top cylinder two ends end face is equipped with screwed hole, and inwall has spline, and annular thrust cushion block 1,2 is fastening by bolt and the electric cylinder top cylinder of screw-in screwed hole; Motor stator is connected with electric cylinder top cylinder by spline, this spline structure guarantee motor stator in a circumferential direction with electric cylinder top cylinder spline, motor stator is directly connected with electric cylinder top cylinder, formation shellless motor structure.
Described motor stator 7 is the tubular constructions that are overrided to form by steel disc, the steel disc inner circle punching of stator core has stator slot, in groove, lay winding, it is as a whole that steel disc iron core becomes after laminating, stator core outside has spline, and the thrust cushion block by spline and two ends is fixed on electric cylinder top cylinder, and motor stator produces rotating magnetic field and rotor current interaction when energising, form electric machine structure, for electric cylinder provides actuating force.
Described spline 8 is commercial that chooses as required;
Described encoder 9 is commercial that chooses as required;
Described end cap 10 is end caps of flanged pin shape, flange portion is equipped with through hole, end cap end face part live wire groove, end cap is anchored on electric cylinder top cylinder by stay bolt and annular cushion block 2, between leading screw and end cap, thrust bearing is housed, axially playing supporting leg effect, end cap, by fastening with electric cylinder top cylinder, seals to electric cylinder.
Described screw thread roller 11 is the threaded cylinders of processing, on ball, the lead angle of screw thread is identical with the lift angle of nut cylinder screw thread, there is predetermined length profile of tooth at screw thread roller two ends, the internal tooth at roller tooth and nut cylinder nut portion two ends engagement in rotation process, screw thread roller plays transmission power in transmission device, is converted into the rectilinear motion of nut cylinder by rotatablely moving of screw thread roller screw;
Described nut cylinder 12 is cylindrical member, nut cylinder openend is the flange nut structure in transmission device, its flange outer diameter is identical with electric cylinder cylinder diameter, flange contacts and plays a supportive role with electric cylinder inboard wall of cylinder block, buffer inner core is stretched in the other one end of nut cylinder, stretch into buffer inner cylindrical portion internal diameter and need guarantee that screw mandrel does not contact with nut cylinder inwall when bearing load is out of shape, nut tube length degree need guarantee that leading screw does not bump with nut cylinder bottom in impulse stroke, nut cylinder stretches into buffer inner core end and is processed with piston ring groove, can embed piston ring, piston ring plays sealing and lubrication.Nut cylinder is linear motion unit part in electric cylinder, the tubular structure of nut cylinder is combined the flange nut structure of transmission device with the piston rod of buffer, by the step structure of nut cylinder, can reduce to stretch into nut cylinder section diameter, avoided the maximization of buffer in radial direction size, make nut cylinder can, as the piston rod of buffer in buffer, make electric cylinder there is pooling feature simultaneously;
Described back-up ring the 13, the 14th, commercial of choosing as required;
Described electric cylinder cylinder body 15 is flanged pin hollow barrel-type parts, cylinder body flange portion is equipped with through hole, during assembling, by stay bolt, electric cylinder cylinder body and electric cylinder top cylinder are connected as one, the cylinder body other end is inwardly outstanding, convex section diameter is identical with buffer urceolus diameter, and electric cylinder cylinder body is by fastening with electric cylinder top cylinder, and one end contacts with buffer urceolus, can prevent that dust and other impurities from entering electric cylinder inside, play sealing and protective action;
Described piston ring 16 is commercial that chooses as required;
Described buffer inner core 17 is tubular construction parts, it is identical that cylinder internal diameter and nut cylinder stretch into bumper portion external diameter, buffer inner core outboard end has boss, projection section is processed with groove, projection section outside is processed with screwed hole, and screwed hole, through groove, has desired depth on inner core barrel, inner core other end end face has through hole, by screw threads for fastening, is connected with buffer urceolus.Nut cylinder and the sealing of buffer inner core form buffer hydraulic pressure inner chamber and store fluid, when electric cylinder withstands shocks load, between nut cylinder and buffer inner core, form relative motion, fluid is flowed between buffer hydraulic pressure inner chamber and exocoel, thereby play cushioning effect;
Described buffer urceolus 19 is the tubular construction parts that coordinate with buffer inner core, buffer urceolus load buffer inner core groove end has through hole, through hole is corresponding with buffer inner core screwed hole, it is hydraulic pressure locker room that buffer urceolus and buffer inner core form buffer hydraulic pressure exocoel, is air and fluid mixture in buffer exocoel.
Described seal washer 21 is commercial that chooses as required;
Described double-screw bolt 22, bolt 23, nut 24 are connectors of choosing as required;
Described baffle ring 25 is pads that annular slice has predetermined thickness, evenly has damping hole on baffle ring, damping hole in the buffer course of work fluid by time play damping action, baffle ring has predetermined strength requirement, need guarantee not lose efficacy when bolted.During assembling, bolt, through baffle ring, is assemblied in one by fastening buffer inner core and the buffer urceolus of making;
Described annular cushion block 26 is annular structural parts, in cushion block, be processed with stream, in stream, be provided with leaf valve or other forms of damping valve body, cushion block is installed between buffer inner core and structural member urceolus, buffer chamber is divided into buffer hydraulic pressure inner chamber and buffer hydraulic pressure exocoel, and in annular cushion block, be provided with orifice valve, in the buffer course of work, play damping action.
Described stiffness spring 27 is commercial that chooses as required;
Described bracket 28 is by gusset, to form the axle sleeve shape structure of gusseted, and electric cylinder is connected with other parts by this carrier structure.
3, advantage and effect: a kind of electric cylinder with pooling feature of the present invention, its advantage is:
1) rotor is combined with leading screw, saved the intermediate drive from motor to leading screw, reduced the driving error in intermediate drive, improved transmission efficiency, and make through the rectilinear motion of the nut cylinder of leading screw conversion control convenient, precision is higher, has saved the physical dimension that intermediate drive has reduced electric cylinder to a certain extent.
2) nut cylinder is buffering piston bar simultaneously, the tubular structure by feed screw nut and install sealing device additional, and transmission device and buffer combination, the problem of having avoided electric cylinder length dimension to maximize, makes the easy to install of electric cylinder.
3) the motor middle force transferring part being converted in nut cylinder rectilinear motion that rotatablely moves, be screw thread roller, roller bearing capacity is the several times of roller bearing capacity, can be applicable to heavily loaded occasion.
4) buffer and electric cylinder are concentrated on to one, make electric cylinder there is pooling feature, reduced the impact of shock loading on electric cylinder overall performance, increased the useful life of electric cylinder, and expanded the scope of application of electric cylinder.
Accompanying drawing explanation:
Fig. 1 is the cross section view of invention
The integrated lead screw shaft mapping of Fig. 2
Fig. 3 is nut piston bar and bumper portion cutaway view
In figure, symbol description is as follows:
1, leading screw; 1a, encoder-side; 1b, rotor; 1c, leading screw end; 2, angular contact ball bearing; 3, annular thrust cushion block 1; 4, annular thrust cushion block 2; 5, stay bolt; 6, electric cylinder top cylinder; 7, motor stator; 8, spline; 9, encoder; 10, end cap; 10a, through hole; 11, screw thread roller; 12, nut cylinder; 12a, flange section; 13, back-up ring; 14, back-up ring; 15, electric cylinder cylinder body; 16, piston ring; 17, buffer inner core; 18, buffer hydraulic pressure inner chamber; 19, buffer urceolus; 20, hydraulic pressure locker room; 21, seal washer; 22, double-screw bolt; 23, bolt; 24, nut; 25, baffle ring; 26, annular cushion block; 27, stiffness spring; 28, bracket.
A, electric cylinder; M, drive motors; B, buffer;
Embodiment:
Based on illustrated execution mode, with regard to the present invention, describe below.
See Fig. 1-Fig. 3, the present invention a kind of with buffer electric cylinder, it is by leading screw 1, rotor 1b, angular contact ball bearing 2, annular thrust cushion block 13, annular thrust cushion block 24, stay bolt 5, electric cylinder top cylinder 6, motor stator 7, spline 8, encoder 9, end cap 10, screw thread roller 11, nut cylinder 12, back-up ring 13, 14, electric cylinder cylinder body 15, piston ring 16, buffer inner core 17, buffer urceolus 19, seal washer 21, baffle ring 25, annular cushion block 26, stiffness spring 27, bracket 28 and connector double-screw bolt 22, bolt 23, nut 24 forms, position annexation between them is:
Electric cylinder A has as shown in Figure 1: drive motors M, with the integrated leading screw 1 of motor stator, the nut cylinder 12 buffer B as piston rod.Leading screw 1 is provided with angular contact ball bearing 2 and annular thrust cushion block 13 as the two ends of rotor 1b, 24, angular contact ball bearing 2 outer rings are gripped by annular thrust cushion block 13 and 24, annular thrust cushion block 13, 24, circumferencial direction is equipped with through hole, through stay bolt 5, be anchored on electric cylinder top cylinder 6, by angular contact ball bearing 2, the axial motion of leading screw 1 is limited, guaranteed electric cylinder when bearing Axial Loads and rotor integrated leading screw 1 also the axial location of rotor 1b is constant, thereby motor can normally be worked, leading screw 1 is achieved with rotor 1b integral structure, leading screw 1 concentrates on same axle with rotor 1b, jockey in the middle of having saved, such as shaft coupling etc., dwindled the size of electric cylinder, and make transmission more accurate.Leading screw 1 end of thread forms electric cylinder transmission device by screw thread roller 11 with nut cylinder 12 and is contained in nut cylinder 12 and electric cylinder cylinder body 15; Buffer inner core 17 and 12 sockets of nut cylinder, buffer urceolus 19 and 15 sockets of electric cylinder cylinder body; Buffer inner core 17 links together by seal washer 21, double-screw bolt 22 and bolt 25 with buffer urceolus 19.
Drive motors M has spline by outside as shown in Figure 1 motor stator 7, application are press-fitted the integrated rotor 1b of leading screw in method and roller screw transmission mechanism and form, motor stator 7 outsides have spline, by spline 8, keep not rotating motion with electric cylinder top cylinder 6, keyway is uniformly distributed, number at least can guarantee that motor stator 7 is reliably fixed in electric cylinder top cylinder 6 when motor peak power output is worked, motor stator 7 two ends are by annular thrust cushion block 13 and 24 clampings, the axial location of fixed electrical machinery stator 7.
Motor rotor shaft partly stretches out, encoder-side 1a upper end is provided with encoder 9, encoder 9 can detect rotating speed and the position of motor, encoder 9 and control device connect to form closed-loop system by regulating motor input voltage to regulate the rotating speed of motor, make torque motor stability of rotation, and can accurately control motor position, so electric cylinder A also can be applied to some high accuracy occasions, herein encoder 9 also other rotating transducers such as available resolver replace.
Motor stator 7 is clamped and fastened on electric cylinder top cylinder 6 by annular thrust cushion block 13 and 24 as shown in Figure 1, angular contact ball bearing 2 is equipped with at rotor portion two ends, angular contact ball bearing 2 can bear larger axis to load, in the electric cylinder A course of work, need bear axial load with the integrated rotor of leading screw, 2 thrust functions of angular contact ball bearing, angular contact ball bearing 2 can bear larger axis to the bearing substitute of load by taper roll bearing etc.Angular contact ball bearing 2 is fixed in electric cylinder top cylinder 6 by annular thrust cushion block 13 and 24, there is end cap 10 on electric cylinder A top, end cap 10 along the circumferential direction has through hole 10a, through stay bolt 5, end cap 10 and annular thrust cushion block 24 are connected in to electric cylinder top cylinder 6, in addition electric cylinder top cylinder 6 is provided with motor wiring duct, its concrete structure does not describe in detail at this, can to its position, adjust according to demand.
In order to reduce the length dimension of electric cylinder A, and motor can coaxially be arranged in electric cylinder, the selected motor of the present invention is flat torque motor, torque motor has the features such as rotating speed is low, moment of torsion is large, overload capacity is strong, response is fast, linear properties is good, torque fluctuations is little, in addition torque motor also has locked-rotor characteristic, the locked-rotor characteristic of torque motor can make electric cylinder A in carrying situation, stay in optional position in electric cylinder A stroke, meet the instructions for use of various working, the locked-rotor characteristic of torque motor has saved electric cylinder A lockable mechanism in addition.Motor can be selected different types of motor according to demand herein, such as being applied to high speed situation, can select AC servo motor, stepping motor etc.
Electric cylinder A as shown in Figure 1, electric cylinder top cylinder 6 is connected with electric cylinder cylinder body 15 by bolt, comprises roller screw transmission device and buffer unit in electric cylinder cylinder body 15.
Roller screw transmission device comprises with drive motors rotor with being press-fitted the leading screw 1 that method is made as one, screw thread roller 11, tubular hollow is as the nut cylinder 12 of buffering piston bar, there has been the back-up ring 13 of retaining thread roller action at screw thread roller 11 two ends, 14, back-up ring is that annular can be with 11 rotations of screw thread roller, nut cylinder 12 nut end are flange shape, flange section 12a has certain thickness to contact with electric cylinder cylinder body 15, the other end of nut cylinder 12 (piston end) stretches into buffer inner core 17, piston ring 16 is equipped with in nut cylinder 12 piston end ends, piston ring 16 sealing nut cylinders 12 and buffer inner core 17 form buffer hydraulic pressure inner chamber 18, the length of nut cylinder 12 can guarantee that leading screw 1 threaded portion screws in completely and do not bump.
Buffer is by buffer inner core 17, buffer urceolus 19, seal washer 21, partly form with baffle ring 25 of damping hole etc. as shown in Figure 1, nut cylinder 12 forms buffer hydraulic pressure inner chamber 18 through piston ring 16 sealings and inner core, buffer inner core 17 and buffer urceolus 19 are installed in electric cylinder cylinder body 15 with one heart, and buffer inner core 17 and buffer urceolus 19 form hydraulic pressure locker room 20.Nut cylinder 12 inserting ends have stairstepping projection section, support buffer contacts with electric cylinder cylinder body 15 outside projection section, prevent that buffer from rocking in electric cylinder, projection section is milling groove along the circumferential direction, buffer urceolus 19 can partial insertion groove in, boss trench portions outside is equipped with screwed hole, buffer inner core buffer screwed hole is corresponding with buffer urceolus 19 through holes, buffer inner core 17 boss grooves are built-in with seal washer 21, by double-screw bolt 22, are connected and are made buffer inner core 17 and buffer urceolus 19 end part seals.
Buffer urceolus 19 has the fixing through hole of installation double-screw bolt 22 and buffer inner core 17 with buffer inner core 17 sealed ends, buffer urceolus 19 is provided with pressure regulating valve near bottom outside, can regulate gas pressure in buffer, through hole is arranged at buffer urceolus 19 bottoms, sealing through bolt 23, nut 24, maintenance baffle ring 25 and buffer inner core 17 and buffer urceolus 19, buffer urceolus 19 outsides contact with electric cylinder cylinder body 15 end flange, with buffer inner core 17 boss Outboard Sections, jointly buffer is supported in electric cylinder cylinder body 15.
Buffer hydraulic pressure inner chamber 18 and exocoel are that hydraulic pressure locker room 20 is communicated with through damping stream, there is through hole in buffer inner core 17 bottom centre, one maintenance baffle ring 25 is arranged at buffer inner core bottom, on baffle ring 25, have damping hole and pass through bolt 23, nut 24 is pressed on buffer inner core 17 bottoms, between buffer inner core 17 and buffer urceolus 19 bottoms, there is annular cushion block 26, in annular cushion block 26, there is fluid stream, in stream, be provided with unidirectional valve, in buffer B compression process, buffer hydraulic pressure inner chamber 18 fluid are by keeping baffle ring 25 damping holes, through the unidirectional valve in annular cushion block 26 streams, flowing into buffer exocoel is hydraulic pressure locker room 20, keep size and the number of damping hole in baffle ring 25 to arrange according to required buffer B performance herein, unidirectional valve can be used leaf valve etc. to have the valve body of damping vibration attenuation effect.Buffer B bottom has bracket 28 to be connected with miscellaneous part.
In buffer hydraulic pressure inner chamber 18, be full of fluid, exocoel is in hydraulic pressure locker room 20, to be filled with gas and fluid, buffer withstands shocks in compression process, in buffer inner chamber, fluid flows into exocoel, when flowing through damping hole and unidirectional valve, fluid can produce damping vibration attenuation power, impulsive force when decay electric cylinder is hit, fluid compresses the gas in exocoel after entering exocoel, now gas is equivalent to spring, storage power release when bounce-back during compression, impel buffer B to recover initial position, exocoel is that the gas in hydraulic pressure locker room 20 can be air or nitrogen.
In addition, between buffer B and nut cylinder 12, stiffness spring 27 is installed, stiffness spring 27 one end are fixed on nut cylinder 12 projection section ends, the other end is fixed on buffer B upper end, stiffness spring 27 stretches when bearing the impact of buffer draw direction at buffer B, apparatus with shock absorbing, and the pulling force when producing buffer B and replying initial position.Stiffness spring 27 incipient extension length can utilize pressure regulating valve to regulate buffer B exocoel gas pressure to adjust.
Buffer B forms many tubulars, in the buffer B course of work, fluid circulates between buffer inner core 17 and buffer urceolus 19, buffer B also can be used monotubular shape, less than the axial dimension of monotubular structure buffer with regard to the many tubulars of the present invention, avoided electric cylinder A axial dimension problems of too after planetary roller screw combined with transmission buffer, and the many tubular constructions of buffer have more effectively utilized the inner space of electric cylinder cylinder body 15.
Owing to thering is buffer B, electric cylinder A shock loading in the course of the work can effectively be subdued, reduced the destructiveness of shock loading to electric cylinder A, is improved the useful life of electric cylinder A, electric cylinder A can be applied to heavy duty and the load place that withstands shocks.

Claims (1)

1. with an electric cylinder for buffer, it is characterized in that: it by with the integrated screw mandrel of rotor, angular contact ball bearing, annular thrust cushion block 1, 2, stay bolt, electric cylinder top cylinder, motor stator, spline, encoder, end cap, screw thread ball, nut cylinder, back-up ring, electric cylinder cylinder body, piston ring, buffer inner core, buffer urceolus, seal washer, baffle ring, annular cushion block, stiffness spring and bracket form, motor stator by spline in electric cylinder top cylinder inner periphery direction spline, rotor and leading screw are integrated, leading screw is supported in electric cylinder top cylinder by angular contact ball bearing as motor stator end, stretch into electric cylinder top cylinder and motor stator mix proportion motor, motor stator and rotor are contained in the common drive part that forms electric cylinder in electric cylinder top cylinder, and annular thrust pad piece 1 is installed at motor stator two ends, 2, annular thrust cushion block 1, the 2 outer through holes, annular thrust cushion block 1 of being along the circumferential direction equipped with, 2 is fastening by bolt and electric cylinder top cylinder, threads of lead screw end forms electric cylinder transmission device by screw thread roller and nut cylinder and is contained in nut cylinder and electric cylinder cylinder body, buffer inner core and nut jacket casing connect, buffer urceolus and the socket of electric cylinder cylinder body, buffer inner core and buffer urceolus link together by seal washer, double-screw bolt and bolt,
Described leading screw is the threaded stairstepping major axis in one end, leading screw and rotor are integrated, lead screw shaft one end is stepped, the other end is processed with screw thread, ladder axle head and rotor adopt and are press-fitted method assembling, stretch in the motor being contained in electric cylinder top cylinder, by angular contact ball bearing, supported, output shaft as motor, the end of thread of leading screw is the leading screw in drive mechanism, leading screw and the engagement of screw thread roller, leading screw rotates and drives screw thread roller to rotate, and drives nut cylinder moving linearly in drive mechanism;
Described annular thrust cushion block 1, the 2nd, revolution cylindrical member, annular thrust cushion block outer lug boss part external diameter is identical with electric cylinder top cylinder, mounting portion external diameter is identical with electric cylinder top cylinder internal diameter, annular thrust cushion block outer lug boss is partly equipped with through hole, lead to the hole site is identical with end cap and electric cylinder top cylinder hole site, annular thrust cushion block 2 one end contact with end cap, one end contacts with motor stator, fastening by stay bolt, play the effect of fixed electrical machinery stator, angular contact ball bearing is installed on annular thrust cushion block 1, in 2, annular thrust cushion block 1, the axial motion of 2 internal boss restriction leading screws, prevent leading screw axial endplay when carrying, annular thrust cushion block 1, in the time of must guaranteeing electric cylinder carrying, there is not damage inactivation in 2 internal boss thickness,
Described electric cylinder top cylinder is the cylindrical member that has predetermined wall thickness, and electric cylinder top cylinder two ends end face is equipped with screwed hole, and inwall has spline, and annular thrust cushion block 1,2 is fastening by bolt and the electric cylinder top cylinder of screw-in screwed hole; Motor stator is connected with electric cylinder top cylinder by spline, this spline structure guarantee motor stator in a circumferential direction with electric cylinder top cylinder spline, motor stator is directly connected with electric cylinder top cylinder, formation shellless motor structure;
Described motor stator is the tubular construction being overrided to form by steel disc, the steel disc inner circle punching of stator core has stator slot, in groove, lay winding, it is as a whole that steel disc iron core becomes after laminating, stator core outside has spline, and the thrust cushion block by spline and two ends is fixed on electric cylinder top cylinder, and motor stator produces rotating magnetic field and rotor current interaction when energising, form electric machine structure, for electric cylinder provides actuating force;
Described end cap is the end cap of flanged pin shape, flange portion is equipped with through hole, end cap end face part live wire groove, end cap is anchored on electric cylinder top cylinder by stay bolt and annular cushion block 2, between leading screw and end cap, thrust bearing is housed, axially playing supporting leg effect, end cap, by fastening with electric cylinder top cylinder, seals to electric cylinder;
Described screw thread roller is the threaded cylinder of processing, on ball, the lead angle of screw thread is identical with the lift angle of nut cylinder screw thread, there is predetermined length profile of tooth at screw thread roller two ends, the internal tooth at roller tooth and nut cylinder nut portion two ends engagement in rotation process, screw thread roller plays transmission power in transmission device, is converted into the rectilinear motion of nut cylinder by rotatablely moving of screw thread roller screw;
Described nut cylinder is cylindrical member, nut cylinder openend is the flange nut structure in transmission device, its flange outer diameter is identical with electric cylinder cylinder diameter, flange contacts and plays a supportive role with electric cylinder inboard wall of cylinder block, buffer inner core is stretched in the other one end of nut cylinder, stretch into buffer inner cylindrical portion internal diameter and need guarantee that screw mandrel does not contact with nut cylinder inwall when bearing load is out of shape, nut tube length degree need guarantee that leading screw does not bump with nut cylinder bottom in impulse stroke, nut cylinder stretches into buffer inner core end and is processed with piston ring groove, can embed piston ring, piston ring plays sealing and lubrication, nut cylinder is linear motion unit part in electric cylinder, the tubular structure of nut cylinder is combined the flange nut structure of transmission device with the piston rod of buffer, by the step structure of nut cylinder, can reduce to stretch into nut cylinder section diameter, avoided the maximization of buffer in radial direction size, make nut cylinder simultaneously in buffer as the piston rod of buffer, make electric cylinder there is pooling feature,
Described electric cylinder cylinder body is flanged pin hollow barrel-type part, cylinder body flange portion is equipped with through hole, during assembling, by stay bolt, electric cylinder cylinder body and electric cylinder top cylinder are connected as one, the cylinder body other end is inwardly outstanding, convex section diameter is identical with buffer urceolus diameter, and electric cylinder cylinder body is by fastening with electric cylinder top cylinder, and one end contacts with buffer urceolus, prevent that dust foreign material from entering electric cylinder inside, play sealing and protective action;
Described buffer inner core is tubular construction part, it is identical that cylinder internal diameter and nut cylinder stretch into bumper portion external diameter, buffer inner core outboard end has boss, projection section is processed with groove, projection section outside is processed with screwed hole, and screwed hole, through groove, has desired depth on inner core barrel, inner core other end end face has through hole, by screw threads for fastening, is connected with buffer urceolus; Nut cylinder and the sealing of buffer inner core form buffer hydraulic pressure inner chamber and store fluid, when electric cylinder withstands shocks load, between nut cylinder and buffer inner core, form relative motion, fluid is flowed between buffer hydraulic pressure inner chamber and exocoel, thereby play cushioning effect;
Described buffer urceolus is the tubular construction part coordinating with buffer inner core, buffer urceolus load buffer inner core groove end has through hole, through hole is corresponding with buffer inner core screwed hole, it is hydraulic pressure locker room that buffer urceolus and buffer inner core form buffer hydraulic pressure exocoel, is air and fluid mixture in buffer exocoel;
Described baffle ring is the pad that annular slice has predetermined thickness, evenly has damping hole on baffle ring, damping hole in the buffer course of work fluid by time play damping action, baffle ring has predetermined strength requirement, need guarantee not lose efficacy when bolted; During assembling, bolt, through baffle ring, is assemblied in one by fastening buffer inner core and the buffer urceolus of making;
Described annular cushion block is annular structural part, in cushion block, be processed with stream, in stream, be provided with leaf valve or other forms of damping valve body, cushion block is installed between buffer inner core and structural member urceolus, buffer chamber is divided into buffer hydraulic pressure inner chamber and buffer hydraulic pressure exocoel, and in annular cushion block, be provided with orifice valve, in the buffer course of work, play damping action;
Described bracket is by gusset, to form the axle sleeve shape structure of gusseted, and electric cylinder is connected with other parts by this carrier structure.
CN201410376618.8A 2014-08-01 2014-08-01 A kind of electric cylinder with buffer Active CN104135108B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410376618.8A CN104135108B (en) 2014-08-01 2014-08-01 A kind of electric cylinder with buffer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410376618.8A CN104135108B (en) 2014-08-01 2014-08-01 A kind of electric cylinder with buffer

Publications (2)

Publication Number Publication Date
CN104135108A true CN104135108A (en) 2014-11-05
CN104135108B CN104135108B (en) 2016-10-12

Family

ID=51807682

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410376618.8A Active CN104135108B (en) 2014-08-01 2014-08-01 A kind of electric cylinder with buffer

Country Status (1)

Country Link
CN (1) CN104135108B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105375674A (en) * 2015-11-10 2016-03-02 中国科学院长春光学精密机械与物理研究所 Direct-driven precise motor displacement actuator
CN105605172A (en) * 2016-02-29 2016-05-25 天津科为客科技有限公司 Linear transmission device and detaching method thereof
CN107288830A (en) * 2017-06-29 2017-10-24 鲍兆伟 A kind of energy storage electric cylinder
WO2017197543A1 (en) * 2016-05-20 2017-11-23 潘微杰 Smart electric drive cylinder device
CN108678394A (en) * 2018-03-30 2018-10-19 中建钢构有限公司 Steel construction piece mounting device and steel construction piece installation method
CN108869680A (en) * 2018-08-30 2018-11-23 厦门微控科技有限公司 A kind of electric cylinder with circulating cooling channel

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5554899A (en) * 1993-04-10 1996-09-10 Thk Co., Ltd. Electric Actuator
EP1166425A1 (en) * 1999-12-30 2002-01-02 Crouzet Automatismes Sealed motor rotor with ball bearing
CN200980019Y (en) * 2006-10-18 2007-11-21 重庆海通机械制造有限公司 An electrically driven cylinder controlled and served by the straight movement of a piston rod
CN201027884Y (en) * 2007-04-05 2008-02-27 中国人民解放军空军航空大学 Barometric reset hydraulic damping device used for protecting electric cylinder
CN201475083U (en) * 2009-09-04 2010-05-19 无锡智航控制技术有限公司 Force balance type fluid circulation electric cylinder
CN201671996U (en) * 2010-01-29 2010-12-15 宁波亚德客自动化工业有限公司 Adjustable hydraulic buffer
US8053946B2 (en) * 2006-07-27 2011-11-08 Sumitomo Heavy Industries, Ltd. Coreless and brushless direct-current motor, Gifford McMahon (GM) cryogenic cooler, pulse tube cryogenic cooler, cryopump, magnetic resonance imaging (MRI) apparatus, superconducting magnet (SCM) apparatus, nuclear magnetic resonance (NMR) apparatus, and cryogenic cooler for cooling semiconductor
CN103001408A (en) * 2012-11-29 2013-03-27 苏州博德自动化科技有限公司 Rapid pressing buffering device of automatic rotor commutator pressing machine
CN203395075U (en) * 2013-07-29 2014-01-15 富奥汽车零部件股份有限公司 Shock absorber with hydraulic buffer limiting structure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5554899A (en) * 1993-04-10 1996-09-10 Thk Co., Ltd. Electric Actuator
EP1166425A1 (en) * 1999-12-30 2002-01-02 Crouzet Automatismes Sealed motor rotor with ball bearing
US8053946B2 (en) * 2006-07-27 2011-11-08 Sumitomo Heavy Industries, Ltd. Coreless and brushless direct-current motor, Gifford McMahon (GM) cryogenic cooler, pulse tube cryogenic cooler, cryopump, magnetic resonance imaging (MRI) apparatus, superconducting magnet (SCM) apparatus, nuclear magnetic resonance (NMR) apparatus, and cryogenic cooler for cooling semiconductor
CN200980019Y (en) * 2006-10-18 2007-11-21 重庆海通机械制造有限公司 An electrically driven cylinder controlled and served by the straight movement of a piston rod
CN201027884Y (en) * 2007-04-05 2008-02-27 中国人民解放军空军航空大学 Barometric reset hydraulic damping device used for protecting electric cylinder
CN201475083U (en) * 2009-09-04 2010-05-19 无锡智航控制技术有限公司 Force balance type fluid circulation electric cylinder
CN201671996U (en) * 2010-01-29 2010-12-15 宁波亚德客自动化工业有限公司 Adjustable hydraulic buffer
CN103001408A (en) * 2012-11-29 2013-03-27 苏州博德自动化科技有限公司 Rapid pressing buffering device of automatic rotor commutator pressing machine
CN203395075U (en) * 2013-07-29 2014-01-15 富奥汽车零部件股份有限公司 Shock absorber with hydraulic buffer limiting structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105375674A (en) * 2015-11-10 2016-03-02 中国科学院长春光学精密机械与物理研究所 Direct-driven precise motor displacement actuator
CN105375674B (en) * 2015-11-10 2018-03-13 中国科学院长春光学精密机械与物理研究所 Motor-direct-drive type precise displacement actuator
CN105605172A (en) * 2016-02-29 2016-05-25 天津科为客科技有限公司 Linear transmission device and detaching method thereof
WO2017197543A1 (en) * 2016-05-20 2017-11-23 潘微杰 Smart electric drive cylinder device
CN107288830A (en) * 2017-06-29 2017-10-24 鲍兆伟 A kind of energy storage electric cylinder
CN107288830B (en) * 2017-06-29 2019-06-18 南京托尼士自动化科技有限公司 A kind of energy storage electric cylinder
CN108678394A (en) * 2018-03-30 2018-10-19 中建钢构有限公司 Steel construction piece mounting device and steel construction piece installation method
CN108869680A (en) * 2018-08-30 2018-11-23 厦门微控科技有限公司 A kind of electric cylinder with circulating cooling channel
CN108869680B (en) * 2018-08-30 2020-04-07 厦门微控科技有限公司 Electric cylinder with circulating cooling channel

Also Published As

Publication number Publication date
CN104135108B (en) 2016-10-12

Similar Documents

Publication Publication Date Title
CN105940245B (en) Actuator with planetary roller screw (PWG)
US8109371B2 (en) Damper
CN103821861B (en) Axial eddy current damper based on spiral transmission method
US9988030B2 (en) Electromechanical-magnetically integrated braking assistance device
CN100370387C (en) Control system for electric actuator
CN104400794B (en) A kind of tow-armed robot modularized joint of hollow structure
US8573573B2 (en) Spring strut arrangement for wheel suspension of motor vehicles
US8541895B2 (en) Energy regenerating damper
CN104747651B (en) A kind of paralleling model semi-active vibration-isolating device
US8469164B2 (en) Damper
CN101882822B (en) Generator rotor with improved hollow shaft
KR100622467B1 (en) Electromagnetic damper
CN102734091A (en) Driver system for wind turbine
CN101809327B (en) Linear actuator
CN104500641B (en) A kind of birotor self-powered amortisseur based on magnetic rheology elastic body
JP2008213098A (en) Index table
CN102483142A (en) Linear unit
CA2680005C (en) Actuator for vehicle
US20090044645A1 (en) Motor driven linear actuator
CN104389942A (en) Three-working surface rotary type damper based on magnetorheological fluid
EP1970598A1 (en) Feed screw mechanism
KR100622466B1 (en) Electromagnetic damper
US9682473B2 (en) Electric fluidic rotary joint actuator with pump
CN101927497B (en) Rotating and swinging joint module of robot of single degree of freedom
CN102166720B (en) Structural support of ball screw assembly

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant