CN210089912U

CN210089912U - Hydraulic cylinder thrust sensor

Info

Publication number: CN210089912U
Application number: CN201921326895.2U
Authority: CN
Inventors: 王严
Original assignee: Suzhou Singena Technology And Control Technology Co Ltd
Current assignee: Suzhou Singena Technology And Control Technology Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-02-18
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses a hydraulic cylinder thrust sensor, including hydraulic cylinder and install the elastic rod at the hydraulic cylinder output, the middle part of elastic rod is the connecting axle, sets up two keyways along connecting axle length direction symmetrical arrangement on the connecting axle, installs the foil gage in the keyway, and flexible circuit board and casing have been cup jointed in proper order to the outside of connecting axle, and flexible circuit board is connected with the foil gage electricity, and the cable of being connected with the flexible circuit board electricity is installed to the front end of elastic rod. The utility model has high measurement precision, and solves the problem of measurement error caused by converting hydraulic pressure into thrust; the utility model discloses a thrust sensor adopts resistance strain formula principle, attaches resistance strain gauge on the elastic rod, and when the elastic rod atress, the strain gauge sense received the meeting an emergency that the elastic rod produced, passes through cable transport to outside receiver with the signal.

Description

Hydraulic cylinder thrust sensor

Technical Field

The utility model belongs to the technical field of the sensor, concretely relates to hydraulic cylinder thrust sensor.

Background

In large industrial equipment, hydraulic occasions such as engineering machinery and the like are all required, and thrust measurement of a hydraulic oil cylinder is an essential link for use. At present, for thrust measurement of a large hydraulic oil cylinder, a hydraulic sensor is used for indirectly measuring oil pressure and converting the oil pressure into piston thrust of the hydraulic oil cylinder, the indirect scheme is low in measurement accuracy, and therefore the hydraulic oil cylinder thrust sensor capable of solving the problems is urgently needed.

SUMMERY OF THE UTILITY MODEL

To the problem that above-mentioned prior art exists, the utility model provides a hydraulic cylinder thrust sensor can realize improving measurement accuracy's sensor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a hydraulic cylinder thrust sensor, includes hydraulic cylinder and installs the elastic rod at the hydraulic cylinder output, the middle part of elastic rod is the connecting axle, set up two keyways along connecting axle length direction symmetrical arrangement on the connecting axle, install the foil gage in the keyway, flexible circuit board and casing have been cup jointed in proper order to the outside of connecting axle, flexible circuit board is connected with the foil gage electricity, the cable of being connected with the flexible circuit board electricity is installed to the front end of elastic rod.

Preferably, the connecting shaft is provided with a circular bottom surface with the same radius at two ends and an inwards concave arc-shaped side surface at the middle part.

Preferably, both ends of the housing are laser welded to both ends of the connecting shaft.

Preferably, the shell is a corrugated pipe with corrugations on the inner annular wall.

Preferably, the end face of the hydraulic oil cylinder is provided with a mounting plate for fixing the device.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model has the advantages that the sensor is directly arranged on the piston rod of the hydraulic oil cylinder, and the piston rod of the hydraulic oil cylinder is directly designed into the force sensor, so that the high measurement precision is realized, and the problem of measurement error caused by the conversion of hydraulic pressure into thrust is solved;

(2) the thrust sensor of the utility model adopts the resistance strain type principle, the resistance strain gauge is attached on the elastic rod, when the elastic rod is stressed, the strain gauge senses the strain generated by the elastic rod, and the signal is transmitted to an external receiver through a cable;

(3) the utility model discloses the casing has been cup jointed in the outside of elastic rod, can realize that hydraulic cylinder can play sealed effect in abominable environment, and the casing is inside to be the stainless steel shell of ripple design, has the contraction work ability, can not influence the atress of elastic rod.

Drawings

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

FIG. 2 is an exploded view of the connection between the elastic rod and the housing of the present invention;

fig. 3 is an internal cross-sectional view of the housing of the present invention.

Description of reference numerals:

1. hydraulic cylinder, 2, mounting panel, 3, casing, 4, elastic rod, 5, cable, 6, flexible circuit board, 7, foil gage, 8, connecting axle, 9, keyway.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 3, a hydraulic cylinder thrust sensor comprises a hydraulic cylinder 1 and an elastic rod 4 installed at the output end of the hydraulic cylinder 1, wherein an installation plate 2 used for fixing the device is installed on the end face of the hydraulic cylinder 1, installation holes used for fixing are formed in four corners of the installation plate 2, a connecting shaft 8 is arranged in the middle of the elastic rod 4, two key slots 9 symmetrically arranged along the length direction of the connecting shaft 8 are formed in the connecting shaft 8, strain gauges 7 are installed in the key slots 9, the strain gauges 7 are attached to the key slots 9, when the elastic rod 4 is stressed, the strain gauges 7 sense strain generated by the elastic rod 4, a piston rod on the hydraulic cylinder 1 is changed into a thrust sensor, and the measurement precision is higher;

flexible circuit board 6 and casing 3 have been cup jointed in proper order to the outside of connecting axle 8, casing 3 is equipped with corrugated bellows on the inner ring wall, and this kind of inside ripple formula design has the contraction work ability, can not influence the atress of elastic rod 4, connecting axle 8 has both ends and is the arc side of the same circular bottom surface of radius, middle part for an indent, and the middle part leaves the clearance between casing 3 and connecting axle 8, can be used to place flexible circuit board 6, prevents that casing 3 from contracting in-process damage flexible circuit board 6, laser welding is passed through at the both ends of casing 3 at connecting axle 8 both ends, flexible circuit board 6 is connected with foil gage 7 electricity, the cable 5 of being connected with flexible circuit board 6 electricity is installed to the front end of elastic rod 4, and the one end that elastic rod 4 was kept away from to cable 5 is.

During the use, hydraulic cylinder 1 piston rod is at the application of force in-process, can press elastic rod 4 to its production deformation, attached foil gage 7 in keyway 9 inside experiences the meeting an emergency that elastic rod 4 produced, become a thrust sensor with the piston rod on hydraulic cylinder 1, and with measured information transmission to the outside, casing 3 has been cup jointed on elastic rod 4, can play sealed effect, and casing 3 inside is the stainless steel shell of ripple design, the contracting function has, can not influence the atress of elastic rod 4, do not influence the measuring result.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a hydraulic cylinder thrust sensor, includes hydraulic cylinder (1) and installs elastic rod (4) at hydraulic cylinder (1) output, its characterized in that: the middle part of elastic rod (4) is connecting axle (8), set up two keyway (9) along connecting axle (8) length direction symmetrical arrangement on connecting axle (8), install foil gage (7) in keyway (9), flexible circuit board (6) and casing (3) have been cup jointed in proper order to the outside of connecting axle (8), flexible circuit board (6) are connected with foil gage (7) electricity, cable (5) of being connected with flexible circuit board (6) electricity are installed to the front end of elastic rod (4).

2. The thrust transducer of a hydraulic cylinder according to claim 1, characterized in that said connecting shaft (8) has a circular bottom surface with the same radius at both ends and an arc-shaped side surface with a concave middle part.

3. The thrust transducer of a hydraulic cylinder according to claim 2, characterized in that the two ends of the casing (3) are laser welded to the two ends of the connecting shaft (8).

4. A hydraulic cylinder thrust sensor according to claim 3, characterised in that the casing (3) is a bellows with corrugations on the inner annular wall.

5. The thrust transducer of a hydraulic cylinder according to claim 4, characterized in that the end face of the hydraulic cylinder (1) is provided with a mounting plate (2) for fixing the device.