CN201041225Y

CN201041225Y - Hollow lead screw type multi-stage electric cylinder

Info

Publication number: CN201041225Y
Application number: CNU2007201083810U
Authority: CN
Inventors: 王宣银; 赵雁斌
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2007-04-20
Filing date: 2007-04-20
Publication date: 2008-03-26
Anticipated expiration: 2017-04-20

Abstract

The utility model discloses a hollow screw rod type multi-stage electric cylinder. A servo motor drives a first stage screw rod installed in a wheel box to rotate via a belt and a belt pulley, a nut is installed on the first stage screw rod, the end surface is firmly connected with a first stage inner cylinder tube, and simultaneously one end of a second stage screw rod is fixed with one end of the first stage nut; a nut is installed on the second screw rod, the end surface is firmly connected with a second stage inner cylinder tube, and simultaneously one end of a third stage screw rod is fixed with one end of the second stage nut; a nut is installed on the third screw rod, and the end surface is fixed with a pushing rod; the other end of the pushing rod is connected with an ear ring; the bracing wire of a bracing wire type displacement sensor is firmly connected with the ear ring through the central hole of the screw rod. The three-stage screw rod can be extended and rotated in sequence, so as to push each nut to move horizontally. The load displacement can be conveniently measured and displayed through a straight line displacement sensor. Because the three stage screw rods are overlapped together, the axial installment space is saved. The utility model can be applied in the working situation which has limitation request to the installment space.

Description

A kind of hollow leading screw type multi-stage motor cylinder

Technical field

The utility model relates to electronic cylinder, relates in particular to a kind of hollow leading screw type multi-stage motor 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 utility model provides a kind of hollow leading screw type multi-stage motor cylinder, makes it can provide bigger working stroke under the less situation of axial fitted position.

In order to achieve the above object, the technical solution adopted in the utility model is:

Actuating motor drives the first order screw mandrel that an end is contained in the roller box through belt and belt pulley and is rotationally connected, 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 casing outer side surface, and backguy is fixedlyed connected with earrings by the screw mandrel center hole.

The beneficial effect that the utlity model 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 utility model;

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 utility model 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

Below in conjunction with accompanying drawing the utility model is further described.

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 utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.

Claims

1. hollow leading screw type multi-stage motor cylinder, it is characterized in that: comprise that actuating motor (32) drives the first order screw mandrel (9) that an end is contained in the roller box (1) through belt and belt pulley (26) and is rotationally connected, roller box (1) is connected with outer cylinder (4), suit first order inner cylinder tube (5) and second level inner cylinder tube (6) successively in the outer cylinder (4), first order screw (14) is housed on the first order screw mandrel (9), first order screw (14) end face is equipped with first intermediate mass (15), first intermediate mass (15) is fixedlyed connected with first order inner cylinder tube (5), and second level screw mandrel (7) one ends hold out against first intermediate mass (15) and fix with first order screw (14) one ends simultaneously; Second level screw (17) is housed on the second level screw mandrel (7), second level screw (17) end face is equipped with second intermediate mass (18), second intermediate mass (18) is fixedlyed connected with second level inner cylinder tube (6), and third level screw mandrel (8) one ends hold out against second intermediate mass (18) and fix with second level screw (17) one ends simultaneously; Third level screw (20) is housed on the third level screw mandrel (8), and third level screw (20) end face is equipped with the 3rd intermediate mass (21), and push rod (7) one ends hold out against the 3rd intermediate mass (21) and fix with third level screw (17) one ends simultaneously; The other end of push rod (23) exposes at outer cylinder (4) and is connected with earrings (13); Boom guy type displacement transducer (28) is installed in casing (1) outer side surface, and backguy is fixedlyed connected with earrings (13) by the screw mandrel center hole.