CN100485221C

CN100485221C - Retractable three-grade electric cylinder

Info

Publication number: CN100485221C
Application number: CNB2007100679474A
Authority: CN
Inventors: 王宣银; 赵雁斌
Original assignee: Hangzhou Cameree Electric & Electron Co Ltd; Zhejiang University ZJU
Current assignee: Hangzhou Cameree Electric & Electron Co Ltd; Zhejiang University ZJU
Priority date: 2007-04-10
Filing date: 2007-04-10
Publication date: 2009-05-06
Anticipated expiration: 2027-04-10
Also published as: CN101038023A

Abstract

The invention discloses a telescopic three-stage electric cylinder. The servo motor drives the first-stage screw rod with one end installed in the wheel box to rotate through the belt and the pulley. One end of the first level screw nut is fixed; the second level screw rod is equipped with a screw nut, and the end surface is fixedly connected with the second level inner cylinder, and at the same time, one end of the third level screw rod is fixed with the end of the second level screw nut; the third level screw rod The top is equipped with a screw nut, and the end face is fixed with the push rod; the other end of the push rod is connected with the earring; the pull wire of the pull-wire displacement sensor is fixedly connected with the earring through the center hole of the screw rod. The three-stage screw rod can be extended and rotated successively to push the respective nuts to move in translation. And through the linear displacement sensor, the load displacement can be easily measured and displayed. Since the three-stage screw rods start to nest together, the axial installation space is saved. It can be applied to workplaces with limited installation space.

Description

A kind of retractable three-grade electric cylinder

Technical field

The present invention relates to electronic cylinder, relate in particular to a kind of retractable three-grade electric cylinder.

Background technique

At present, the electronic cylinder of single-stage at home and abroad is extensive use of, but owing to only have single-stage driving mechanism, working stroke is subjected to the restriction of the size of cylinder own, must strengthen push rod length and cylinder body installation dimension, exchanges big working stroke for, usually make cylinder very heavy, long its rigidity that also influences of push rod, it is little to be used for the requirement installation dimension, but the very big occasion of required working stroke; Multistage oil hydraulic cylinder is also arranged in hydraulic system, but oil hydraulic cylinder itself need provide oil sources and corresponding hydraulic equipment, it is convenient inadequately to use.

Summary of the invention

The purpose of this invention is to provide a kind of retractable three-grade electric cylinder, make it under the less situation of axial fitted position, can provide bigger working stroke.

In order to achieve the above object, the technical solution used in the present invention is:

Actuating motor drives the first order screw mandrel that an end is contained in the roller box through belt and belt pulley and rotates, roller box is connected with outer cylinder, suit first order inner cylinder tube and second level inner cylinder tube successively in the outer cylinder, first order screw is housed on the first order screw mandrel, first order screw end face is equipped with first intermediate mass, first intermediate mass is fixedlyed connected with first order inner cylinder tube, and second level screw mandrel one end holds out against first intermediate mass and fixes with first order screw one end simultaneously; Second level screw is housed on the screw mandrel of the second level, and second level screw end face is equipped with second intermediate mass, second intermediate mass fixedlys connected with second level inner cylinder tube, and third level screw mandrel one end holds out against second intermediate mass and fixes with second level screw one end simultaneously; Third level screw is housed on the third level screw mandrel, and third level screw end face is equipped with the 3rd intermediate mass, and push rod one end holds out against the 3rd intermediate mass and fixes with third level screw one end simultaneously; The other end of push rod exposes at outer cylinder and is connected with earrings; The boom guy type displacement transducer is installed in the roller box outer side surface, and backguy is fixedlyed connected with earrings by the screw mandrel center hole.

The beneficial effect that the present invention has is: three grades of screw mandrels, can overhanging one by one rotation, and by the effect of screw thread transmission, promote screw translation separately, thereby on push rod, produce outside thrust, drive the load moving linearly that requires translation.And, can measure and show the load displacement easily by linear displacement transducer.Because it is together nestable that three grades of screw mandrels begin, thereby saved axial installing space, and provide bigger working stroke by the effect of three grades of transmissions.Can be applied to the conditional workplace of installing space.

Description of drawings

Fig. 1 is a structural principle plan view of the present invention;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the right elevation of Fig. 1;

Fig. 4 is the structural principle plan view of the present invention when launching fully;

Fig. 5 is the B partial enlarged drawing of Fig. 4;

Fig. 6 is the C partial enlarged drawing of Fig. 4.

Among the figure: 1, roller box; 2, bearing housing; 3, deep groove ball bearing; 4, outer cylinder; 5, first order inner cylinder tube; 6, second level inner cylinder tube; 7, second level screw mandrel; 8, third level screw mandrel; 9, first order screw mandrel; 10, shaft end ring; 11, round nut; 12, right end cap; 13, earrings; 14, first order screw; 15, first intermediate mass; 16, flange plate; 17, second level screw; 18, second intermediate mass; 19, flange plate; 20, third level screw; 21, the 3rd intermediate mass; 22, flange plate; 23, push rod; 24, bearing fastener; 25, shaft end nut; 26, belt and belt pulley; 27, key; 28, boom guy type displacement transducer; 29, stay bolt nut, 30, oil sealing, 31, oil dripping hole, 32, actuating motor, 33 junction of the edges of two sheets of paper screws, 34, screw, 35, spring collar; 36, support ring; 37, oil sealing; 38, dust ring.

Embodiment

The present invention is further illustrated below in conjunction with accompanying drawing.

Shown in Fig. 1,2,3,4, earlier first order screw 14 is installed in the whorl side of first order screw mandrel 9, the first order screw mandrel 9 terminal back-up rings 10 that a band support ring is installed, and by round nut 11 axially locating.First order screw 14 is realized the location by first intermediate mass 15 and first order inner cylinder tube 5, and first intermediate mass 15 tightens up by junction of the edges of two sheets of paper screw 33 with inner cylinder tube 5.Screw mandrel 7 ends in the second level hold out against second intermediate mass 18, link first order screw 14, second level screw mandrel 7, first order inner cylinder tube 5 threes fixing mutually by flange plate 19, spring collar 35 and screw 34.Second level screw 17 is installed on the second level screw mandrel 7, and second level screw 17 is realized the location by second intermediate mass 18 and second level inner cylinder tube 6, and second intermediate mass 18 tightens up by junction of the edges of two sheets of paper screw 33 with inner cylinder tube 6.Third level screw mandrel 8 ends hold out against second intermediate mass 18, link second level screw 17, third level screw mandrel 8, second level inner cylinder tube 6 threes fixing mutually by flange plate 22, spring collar and screw.Third level screw 20 is installed on the third level screw mandrel 8, and push rod 23 ends hold out against the 3rd intermediate mass 21, links third level screw 20, push rod 23 fixing mutually by flange plate 22, spring collar 35 and screw 34.Boom guy type displacement transducer 28 is fixed on roller box 1 outside, and backguy end and earrings 13 are fixing, and earrings 13 is fixed on the push rod 23.

Shown in Fig. 1,4, two deep groove ball bearing 3 inner rings are cooperated installation with first order screw mandrel 9, the outer ring cooperates with bearing housing 2, and oil sealing 30 is installed between bearing housing and the screw mandrel.Bearing housing 2 cooperates the location with outer cylinder 4, at cylinder barrel 4 right-hand members right end cap 12 is installed, motor 32 output shafts are connected with belt pulley 26 by belt with first order screw mandrel 9, be connected by key between first order screw mandrel 9 and the belt wheel, roller box 1 compresses bearing fastener 24 and outer cylinder 4, and, tighten up roller box 1, right end cap 12 and cylinder body with stay bolt nut 29.

As shown in Figure 6, right end cap 12, first order inner cylinder tube 5 ends and second level inner cylinder tube 6 ends must be installed support ring 36, oil sealing 37 and dust ring 38.

Shown in Fig. 1,4,5,6, during real work, electronic cylinder is installed along the direction horizontal fixed of load movement, the earrings 13 of right-hand member is connected with load that can only translation.Actuating motor 32 drives first order screw mandrel 9 by tape handler 26 and rotates, 14 translations of first order screw, and promote the translation together of back two-stage.When first order screw 14 contacted with the back-up ring 10 of first order screw mandrel 9 tail ends, translation was prevented from, and first order screw 14 will rotate together in company with first order screw mandrel 9.So second level screw mandrel 7 begins to rotate, second level screw 17 promotes third level translation together.When second level screw 17 contacted with second level screw mandrel 7 tail end projective structures, its translation stopped, and beginning is rotated with second level screw mandrel 7.So third level screw mandrel 8 begins to rotate, third level screw 20 drives push rod 23 translation together.This movement process is opposite during backhaul.Boom guy type displacement transducer 28 can be used for the displacement of push rod 23 is measured, and is converted into electrical signal.

Above-mentioned embodiment is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.

Claims

1. A retractable three-stage electric cylinder, characterized in that: the servo motor (32) drives the first-stage screw rod (9) with one end installed in the wheel box (1) to rotate through the belt and the pulley (26), and the wheel box (1) Connected with the outer cylinder (4), the outer cylinder (4) is sequentially fitted with the first-stage inner cylinder (5) and the second-stage inner cylinder (6), and the first-stage screw (9) is mounted There is a first-level screw nut (14), the end face of the first-level screw nut (14) is equipped with a first intermediate block (15), and the first intermediate block (15) is fixedly connected with the first-level inner cylinder (5), and at the same time One end of the second-level screw mandrel (7) pushes against the first intermediate block (15) and is fixed with one end of the first-level screw nut (14); the second-level screw mandrel (7) is equipped with a second-level screw nut (17), The end face of the second stage nut (17) is equipped with a second intermediate block (18), the second intermediate block (18) is fixedly connected with the second stage inner cylinder (6), and at the same time, one end of the third stage screw rod (8) Tighten the second middle block (18) and fix it with one end of the second level nut (17); There is a third intermediate block (21), and one end of the push rod (23) is pressed against the third intermediate block (21) and fixed with one end of the third-level nut (20); the other end of the push rod (23) is exposed on the outer cylinder (4) the outside is connected with the earring (13); the backguy type displacement sensor (28) is installed on the outer surface of the wheel box (1), and the backguy is fixedly connected with the earring (13) by the central hole of the screw mandrel.