CN101819033A

CN101819033A - Differential type displacement detecting device

Info

Publication number: CN101819033A
Application number: CN201010145253A
Authority: CN
Inventors: 刘建华; 李明; 张明; 陈克荣
Original assignee: Jiangsu Shuanglou Construction Group Co Ltd
Current assignee: Jiangsu Shuanglou Construction Group Co Ltd
Priority date: 2010-04-12
Filing date: 2010-04-12
Publication date: 2010-09-01
Anticipated expiration: 2030-04-12
Also published as: CN101819033B

Abstract

The invention relates to a differential type displacement detecting device which comprises a base (24), a bracket (1), a displacement transducer (5), a winding drum (10) and a double-thread sleeve (12). The differential type displacement detecting device is characterized in that a fixed nut (6) is fixed on the bracket (1), and a bushing (18) is fixed on a movable bracket (23); one end of the winding drum (10) is supported on a needle bearing (8), and the other end is supported on a bearing (15); the internal thread and the external thread of the double-thread sleeve (12) are rotatably installed on the fixed nut (6) and a thrust bearing (13), and the thrust bearing (13) is inserted into the bushing (18); one end of a locating pin (16) is inserted into a locating slot (17) after passing through the movable bracket (23); the double-thread sleeve (12) is provided with an axial straight slot (9), and the pin is inserted into the straight slot (9) after passing through the winding drum (10); one end of the displacement transducer (5) is fixed on the bracket (1) after passing through the fixed nut (6), and a mandril (20) on the other end is inserted into a hole of the thrust bearing (13) and is abutted against a adjusting screw (14) at the bottom of the hole. The invention has simple structure, large transmission ratio, wide distance measuring range and high precision.

Description

Differential type displacement detecting device

Technical field

The present invention relates to a kind of construction hoisting operation displacement detector, the pick-up unit of big stroke lifting height, specifically a kind of differential type displacement detecting device are measured in especially a kind of rotation that utilizes reel.

Background technology

As everyone knows, in construction project and equipment installation, often adopt multiple devices synchronous operation hoisting large-size member or equipment.Because of individual device all has the specification of representing its elevating capacity, in use hoisting weight must not surpass its rated load specification, in order to avoid damage equipment, cause the accident, this requirement can realize by the lifting capacity safety guard; Research shows with test result, individual device in the group of planes must promote with other device synchronization or descend in common lifting, and certain the small asynchronous lifting amount of equipment all may make the load of equipment sharply increase, may cause overload even accidents caused, it is very necessary therefore to control the synchronous amount of a group of planes in lifting.It is now ripe to measure the little displacement technology of centimetre-sized, but measures meter level big displacement quantity technology prepattern still, and lacks the proving installation of science.In the big big stroke lifting process of member, made in the past every equipment commonly used send someone to observe band tape graduation and the method control large-scale component of adjusting asynchronous equipment of stopping promote in the method for synchronism of individual device, not only out of true but also time-consuming, the key reason that causes this present situation is to lack the sensing detection device that can measure big displacement quantity.

Summary of the invention

The objective of the invention is the construction inconvenience that causes at lacking big displacement detector in the construction project, design a kind of differential type displacement detecting device that utilizes small displacement sensing device detection big displacement quantity.

Technical scheme of the present invention is:

A kind of differential type displacement detecting device, comprise base 24, support 1, displacement transducer 5, reel 10 and two screw shell 12, it is characterized in that described support 1 is fixedly mounted on the end of base 24, hold-down nut 6 is installed on the support 1, travel(l)ing rest 23 is installed on the other end of base 24, lining 18 is installed on the travel(l)ing rest 23, one end bearing of reel 10 is at needle bearing 8, needle bearing 8 is installed on the hold-down nut 6, the other end of reel 10 is bearing on the bearing 15, bearing 15 is installed on the lining 18, the external thread rotary of two screw shells 12 is contained in the internal thread of hold-down nut 6, the internal thread spinning of two screw shells 12 is on the external thread of push shaft 13, the other end of push shaft 13 is inserted in the lining 18, the end that push shaft 13 inserts in the lining 18 is provided with locating slot 17, and an end of tommy 16 passes travel(l)ing rest 23 backs and inserts in this locating slot 17 in case thrust shaft 13 rotations; Be processed with straight trough 9 vertically on two screw shells 12, pin 11 passes reel 10 back insertion straight troughs 9 and drives two screw shells 12 and rotates with reel 10, one end of displacement transducer 5 is fixed on the support 1 after passing hold-down nut 6, and the set screw 14 at the bottom of the push rod 5 on the other end and the hole of push shaft 12 offsets.

The external thread of described pair of screw shell 12 is identical with the internal thread rotation direction.

Described nut 4 is fastened on displacement transducer 5 and hold-down nut 6 on the fixed support 1, and dog screw 2 passes the screw that screws in behind the screw on the fixed support 1 on the hold-down nut 6.

Beneficial effect of the present invention:

The present invention can be converted to micro-displacement with the big travel displacement in the practice of construction so that detect and reflection in real time in electric-control system.The present invention is simple in structure, measurement is accurate, with low cost, strong to the adaptability of environment, be easy in construction project, apply.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the plan structure synoptic diagram of Fig. 1.

Fig. 3 is the sectional structure synoptic diagram of Fig. 1.

Among the figure: the 1st, fixed support, the 2nd, dog screw, the 3rd, split pin, the 4th, nut, the 5th, displacement transducer, the 6th, hold-down nut, the 7th, circlip, the 8th, needle bearing, the 9th, straight trough, the 10th, reel, the 11st, pin, the 12nd, two screw shells, the 13rd, push shaft, the 14th, set screw, the 15th, bearing, the 16th, tommy, the 17th, locating slot, the 18th, lining, the 19th, grease nipple, the 20th, push rod, the 21st, steel pipe, the 22nd, bolt, the 23rd, travel(l)ing rest, the 24th, base, the 25th, U bolt, the 26th, wire rope.

Embodiment

The present invention is further illustrated below in conjunction with drawings and Examples.

As shown in Figure 1, 2, 3.

A kind of differential type displacement detecting device, it is mainly by base 24, fixed support 1, displacement transducer 5, hold-down nut 6, reel 10, pin 11, two screw shells 12 (are existing internal thread hole, externally threaded sleeve is arranged again, and the rotation direction of internal and external threads is identical), push shaft 13, tommy 16, lining 18, travel(l)ing rest 23 compositions such as grade, support 1 fixed installation (welding or connect by bolt) is at an end of base 24, displacement transducer 5 is installed on the support 1, it passes hold-down nut 6 and by nut 4 hold-down nut 6 is fastened on the support 1, with dog screw 2 support 1 and hold-down nut 6 are fixed as one again, prevent that hold-down nut 6 rotations from causing transmission failure, travel(l)ing rest 23 (can link to each other with base 24 by bolt 22) is installed on the other end of base 24, lining 18 is installed on the travel(l)ing rest 23, one end bearing of reel 10 is on needle bearing 8, needle bearing 8 is installed on the hold-down nut 6, the outside of needle bearing 8 is equipped with circlip 7, the other end of reel 10 is bearing on the bearing 15, bearing 15 is installed on the lining 18, the external thread rotary of two screw shells 12 is contained in the internal thread of hold-down nut 6, push shaft 13 spinnings on the internal thread of two screw shells 12 (two screw shells 12 in, external thread rotary is to identical), the other end of push shaft 13 is inserted in the lining 18, the end that push shaft 13 inserts in the lining 18 is provided with locating slot 17, and an end of tommy 16 passes travel(l)ing rest 23 backs and inserts in this locating slot 17 in case thrust shaft 13 rotations; Be processed with straight trough 9 vertically on two screw shells 12, the pin 11 that drives two screw shells 12 rotations passes in reel 10 these straight troughs 9 of back insertion and moves with reel 10 rotations and along the axis direction straight line so that drive two screw shells 12, one end of displacement transducer 5 is fixed on the support 1 after passing hold-down nut 6, its other end stretches in the push shaft 13, and the push rod 20 on the displacement transducer 5 offsets with the set screw 14 at the bottom of push shaft 13 holes.As shown in Figure 1.

Concrete installation site of the present invention and method of attachment are shown in Fig. 2,3.

Principle of work of the present invention is:

Reel 10 transmits the big travel displacement amount of straight line of coming with wire rope 26 and is converted to the rotation number of turns, and by two screw shells 12 rotations of pin 11 drives, screw 2 is locked in and can not rotates on the support 1 and can not move because hold-down nut 6 is positioned, two screw shells 12 can only rotate on the internal thread of hold-down nut 6 and move axially, the moving circle of reel 10 revolutions, the axial displacement of two screw shells 12 are that a tooth of outer screw thread pair is apart from p ₁Two screw shell 12 external threads of cause are identical with the rotation direction of internal thread, and tommy 16 is inserted in the locating slot 17 of push shaft 13, therefore two screw shells 12 rotate and when doing axial displacement, push shaft 13 can not rotate, can only be relatively the sense of displacement of two screw shells 12 and a reverse tooth distance-p of displacement internal layer screw thread pair ₂, with the displacement p of two screw shells 12 ₁Behind the superposition, the actual displacement of push shaft 13 is Δ X=p ₁-p ₂, and the push rod 20 displacement X of promotion displacement transducer 5, realize differential displacement.In theory, as long as p ₁, p ₂Selection of dimension suitable, even the displacement Δ L that wire rope transfers is come is very big, after transmission of the present invention, can make the push rod 20 of displacement transducer 5 produce microdisplacement Δ X.Therefore, in the permission total kilometres scope of displacement transducer 5, measurable big displacement quantity can reach more than the 10m, even may reach tens of rice.

The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.

Claims

1. differential type displacement detecting device, comprise base (24), support (1), displacement transducer (5), reel (10) and two screw shell (12), it is characterized in that described support (1) is fixedly mounted on the end of base plate (24), hold-down nut (6) is installed on the support (1), travel(l)ing rest (23) is installed on the other end of base (24), lining (18) is installed on the travel(l)ing rest (23), one end bearing of reel (10) is on needle bearing (8), needle bearing (8) is installed on the hold-down nut (6), the other end of reel (10) is bearing on the bearing (15), bearing (15) is installed on the lining (18), the external thread rotary of two screw shells (12) is contained in the internal thread of hold-down nut (6), the internal thread spinning of ut socket (12) is on the external thread of push shaft (13), the other end of push shaft (13) is inserted in the lining (18), the end that push shaft (13) inserts in the lining (18) is provided with locating slot (17), and an end of tommy (16) passes travel(l)ing rest (23) back and inserts in this locating slot (17) in case thrust shaft (13) rotation; Be processed with straight trough (9) vertically on two screw shells (12), pin (11) passes reel (10) back insertion straight trough (9) and drives two screw nuts (12) and rotates with reel (10), one end of displacement transducer (5) is fixed on the support (1) after passing hold-down nut (6), and the set screw (14) at the bottom of push rod on the other end (20) and push shaft (13) hole offsets.

2. differential type displacement detecting device according to claim 1 is characterized in that the external thread of described pair of screw shell (12) is identical with the internal thread rotation direction.

3. differential type displacement detecting device according to claim 1, it is characterized in that nut (4) is fastened on displacement transducer (5) and hold-down nut (6) on the fixed support (1), dog screw (2) passes in the screw that screws in behind the screw on the fixed support (1) on the hold-down nut (6).