CN218381415U

CN218381415U - Force standard device

Info

Publication number: CN218381415U
Application number: CN202222188897.8U
Authority: CN
Inventors: 冯海盈; 张中杰; 王一鸣; 秦国君; 孙晓萍; 何力人; 徐凯; 张霞; 赵伟明; 付翀; 单海娣; 张晓锋; 范博; 杨楠; 李智; 祁一冰; 李照阳
Original assignee: Henan Institute of Metrology
Current assignee: Henan Institute of Metrology
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-01-24
Anticipated expiration: 2032-08-19

Abstract

The utility model relates to a power standard ware, including the pneumatic cylinder, the pneumatic cylinder includes the cylinder body and removes complex piston with the cylinder body direction, encloses into the hydraulic pressure chamber between cylinder body and the piston, and the pneumatic cylinder still includes the pressure sensor who is arranged in measuring the hydraulic pressure chamber liquid pressure that links to each other with the hydraulic pressure chamber, its characterized in that: the force standard device also comprises a force transmission pressure head independent of the piston, a pressure head connecting structure detachably connected with the pressure head of the press machine is arranged on the force transmission pressure head, a force transmission plane is arranged on one of the force transmission pressure head and the piston, and a force transmission ball head in point contact fit with the force transmission plane is arranged on the other part. The utility model provides an among the prior art because of the terminal surface is uneven under the pressure head, appear passing unstable technical problem easily between pressure head and the piston.

Description

Force standard device

Technical Field

The utility model relates to a power value measuring equipment in the field of power value measurement calibration especially relates to a power etalon.

Background

In the field of force value measurement and calibration, force output values of some force output components need to be detected regularly so as to ensure that the force output components can output accurate force values.

For example, the press as a force output component needs to output a specified pressure when working, the pressure is measured by its own pressure sensor, the pressure sensor of the press needs to be calibrated periodically according to corresponding calibration specifications, and a force standard needs to be used during calibration.

The existing force standard device comprises a hydraulic cylinder, the hydraulic cylinder comprises a cylinder body and a piston which is in guide movement fit with the cylinder body, a sealing ring is arranged between the piston and the cylinder body, a hydraulic cavity is formed by enclosing the cylinder body and the piston, the force standard device further comprises a pressure sensor connected with the hydraulic cavity, and the pressure sensor is used for measuring the pressure of liquid in the hydraulic cavity. Arrange the pressure head downside of press in with the pneumatic cylinder during the use, the pressure head of press is down, the piston of pressure head roof pressure pneumatic cylinder, the piston produces pressure to the liquid in the hydraulic pressure chamber, pressure sensor measures the pressure value of liquid, according to the effective area of contact of piston with liquid in the hydraulic pressure chamber and calculate the liquid pressure value that the piston received, this liquid pressure is the same with the effort size of pressure head to the piston, opposite direction, that is to say, just can realize calibrating the press through the contrast of the set output power value of this liquid pressure value and press self.

However, the existing force standard has the problems that: the lower terminal surface of pressure head is the plane, the up end of piston also is the plane, under the ideal state, the transmission of power is realized with the up end plane contact of piston to the lower terminal surface of pressure head, however, the reality is, the lower terminal surface of pressure head is not level and smooth completely after using wearing and tearing (the terminal surface has unsmooth phenomenon under the pressure head), when pressure head and piston contact, plane contact not the ideal, the uneven condition of atress can appear in the piston, not only can increase the piston like this, the wearing and tearing of sealing washer between the cylinder body, still can lead to sensor reading unstability and influence calibration process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power etalon to because of terminal surface unevenness under the pressure head among the solution prior art, appear the unstable technical problem of biography power easily between pressure head and the piston.

In order to solve the above technical problem, the utility model discloses in a technical scheme of power etalon as follows:

the utility model provides a force standard ware, includes the pneumatic cylinder, and the pneumatic cylinder includes the cylinder body and removes complex piston with the cylinder body direction, encloses into the hydraulic pressure chamber between cylinder body and the piston, and the pneumatic cylinder still includes the pressure sensor who is arranged in measuring the liquid pressure in the hydraulic pressure chamber that links to each other with the hydraulic pressure chamber, and the force standard ware still includes independently from the biography power pressure head that the piston set up is provided with the pressure head connection structure that is used for linking to each other with the pressure head of press is removable on the pressure head of biography power, is provided with on one part in biography power pressure head, the piston and passes power the plane, be provided with on the other part be used for with biography power plane point contact complex biography power bulb.

The utility model has the advantages that: during the use, arrange the pneumatic cylinder in the downside of the pressure head of press, connect the biography power pressure head on the pressure head of press through pressure head connection structure, the pressure head of press takes the pressure head of biography power to descend, utilizes the cooperation of passing power bulb and biography power plane, realizes the point contact biography power between the up end of pressure head and piston of biography power, point contact biography power mode can effectually avoid because the power unstability problem of biography that one of them contact surface unevenness leads to.

Further, a sealing ring is arranged between the cylinder body and the piston.

Furthermore, a force transmission ball head is arranged on the force transmission pressure head, and a force transmission plane is formed by the upper end face of the piston.

Furthermore, the pressure head connection structure include set up in the guide rail that the direction of biography power pressure head upper end extends along the left and right direction, pressure head connection structure still including the direction remove assemble in left side movable block and right side movable block on the guide rail, the upper end of left side movable block, right side movable block has the T-shaped connector that is arranged in pressure head lower extreme T-shaped groove along fore-and-aft direction slip assembly, the power standard ware still includes the interval adjustment mechanism who is used for adjusting the interval between left side movable block, the right side movable block.

Further, interval adjustment mechanism is including controlling left side mounting panel and the right side mounting panel of interval arrangement, and left side mounting panel, right side mounting panel are fixed in and pass power pressure head upper end, and interval adjustment mechanism still includes the drive screw that the axis of rotation assembly on left side mounting panel and right side mounting panel extends along the left-right direction, and drive screw passes through left side threaded connection with the left side movable block, and drive screw passes through right side threaded connection with the right side movable block, and the screw thread of left side screw thread, right side screw thread revolves to the opposite direction.

Furthermore, one end of the transmission screw rod is fixed with a hand wheel used for holding and rotating by an operator.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to like or corresponding parts and in which:

fig. 1 is a state diagram of the use of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the force head of FIG. 1;

FIG. 3 is a side view of the force transfer ram of FIG. 2;

description of the reference numerals: 1. a T-shaped slot; 2. a pressure head; 3. a hand wheel; 4. a drive screw; 5. a right mounting plate; 6. a force transmission ball head; 7. a right moving block; 8. a guide rail; 9. a left moving block; 10. a T-shaped connector; 11. a left mounting plate; 12. a piston; 13. a force transfer plane; 14. a baffle plate; 15. a cylinder sleeve; 16. a base plate; 17. a hydraulic chamber; 18. a pressure sensor; 19. and a force transmission pressure head.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The embodiment of the force standard of the present invention is shown in fig. 1~3:

before introducing the structure of this power etalon, treat the press of calibration earlier and simply introduce, the press is hydraulic press, and it includes 2 heads of pressure that can the up-and-down motion under hydraulic power, and the bottom of pressure head is provided with two T-slots 1 that extend along the fore-and-aft direction, and two T-slots are controlled the interval and are arranged, and the T-slot is used for realizing being connected with other parts. The press belongs to the prior art.

The utility model provides a power etalon includes the pneumatic cylinder, and the pneumatic cylinder includes the cylinder body and removes complex piston 12 with the cylinder body direction, and in this embodiment, the cylinder body includes cylinder body sleeve 15, through the bolt fastening in cylinder body sleeve lower extreme bottom plate 16 and through the baffle 14 of bolt fastening in cylinder body sleeve upper end, baffle 14 is the loop configuration. The piston is movably matched with the inner wall of the cylinder sleeve in a guiding way, and a sealing ring is arranged between the piston and the cylinder sleeve.

A hydraulic cavity 17 is enclosed between the cylinder body and the piston, and the hydraulic cylinder 17 further comprises a pressure sensor 18 which is connected with the hydraulic cavity and used for measuring the liquid pressure in the hydraulic cavity.

The force standard device further comprises a force transmission pressure head 19 independent of the piston, a pressure head connecting structure detachably connected with the pressure head of the press machine is arranged on the force transmission pressure head, a force transmission ball head 6 is arranged at the lower end of the force transmission pressure head, a force transmission plane 13 perpendicular to the axis of the piston is formed by the upper end face of the piston, and when the force standard device is used, the lower end of the force transmission ball head is in point contact fit with the force transmission plane.

The pressure head connection structure comprises a guide rail 8 which is arranged at the upper end of the force transmission pressure head and extends along the left-right direction, the guide rail is of a track groove structure, the pressure head connection structure further comprises a left moving block 9 and a right moving block 7 which are assembled on the guide rail in a guiding and moving mode, and a T-shaped connector 10 which is assembled in a T-shaped groove at the lower end of the pressure head in a sliding mode along the front-back direction is arranged at the upper end of each of the left moving block 9 and the right moving block 7. The force standard device further comprises a distance adjusting mechanism for adjusting the distance between the left moving block and the right moving block.

During the use, the T-shaped connector can slide along the fore-and-aft direction and pack into the T-shaped groove that corresponds to realize being connected of biography power pressure head and the pressure head of press, because the interval of the T-shaped groove on the pressure head of different presses is probably different, consequently can adjust the interval between left side movable block, the right side movable block through interval adjustment mechanism in this embodiment, thereby the different press of adaptation.

The distance adjusting mechanism comprises a left side mounting plate 11 and a right side mounting plate 5 which are arranged at left and right intervals, the left side mounting plate and the right side mounting plate are fixed at the upper end of a force transmission pressure head, the distance adjusting mechanism further comprises a transmission lead screw 4 which is rotatably assembled on the left side mounting plate and the right side mounting plate and extends along the left and right directions, the transmission lead screw is in threaded connection with a left side moving block through a left side, the transmission lead screw is in threaded connection with a right side moving block through a right side, and threads of left side threads and right side threads are opposite in rotating direction.

One end of the transmission screw is fixed with a hand wheel 3 which is used for holding and rotating by an operator. When the manual transmission mechanism is used, an operator can rotate the transmission lead screw through the rotary hand wheel, the transmission lead screw rotates forwards, the left side moving block and the right side moving block can move relatively, the transmission lead screw rotates backwards, and the left side moving block and the right side moving block can move back to back.

When the device is used, the distance between the left side moving block and the right side moving block is adjusted according to the distance between the two T-shaped grooves on the pressure head of the press machine to be calibrated, so that the distance between the left side moving block and the right side moving block is matched with the distance between the two T-shaped grooves, the T-shaped connectors corresponding to the moving blocks can be assembled in the corresponding T-shaped grooves in a sliding mode along the front-back direction, and the force transmission pressure head is connected with the press machine.

The pressure head of the press machine drives the force transmission pressure head to move downwards, the force transmission ball head pushes the force transmission plane at the upper end of the piston, the force transmission ball head and the force transmission plane are in point contact, the force transmission pressure head has a movement trend towards the right lower side, therefore, the acting force of the piston on the force transmission pressure head is vertical downwards, whether the lower end surface of the pressure head of the press machine is uneven or not, the acting force of the press machine on the piston is vertical downwards, the sealing ring is prevented from being abraded, and the stability of force value measurement can be ensured.

In other embodiments of the present invention: the force transfer ball head can also be arranged at the upper end of the piston, and at the moment, a force transfer plane in point contact fit with the force transfer ball head is required to be arranged at the lower end of the force transfer pressure head.

In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.

In light of the foregoing description of the present specification, those skilled in the art will also understand that terms used herein, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "lateral," "clockwise," or "counterclockwise," etc., indicate that such terms are based on the orientations and positional relationships illustrated in the drawings of the present specification, and are intended merely for the purpose of facilitating the description and simplifying the description, and do not explicitly or implicitly indicate that the device or element being referred to must have the particular orientation, be constructed and operated in the particular orientation, and therefore such terms are not to be understood or interpreted as limiting the scope of the present invention.

In addition, the terms "first" or "second", etc. used in this specification are used to refer to numbers or ordinal terms for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a power standard ware, includes the pneumatic cylinder, the pneumatic cylinder include the cylinder body and with cylinder body direction removal complex piston, enclose into hydraulic pressure chamber between cylinder body and the piston, the pneumatic cylinder still includes the pressure sensor who is arranged in measuring hydraulic pressure chamber liquid pressure who links to each other with hydraulic pressure chamber, its characterized in that: the force standard device also comprises a force transmission pressure head independent of the piston, a pressure head connecting structure detachably connected with the pressure head of the press machine is arranged on the force transmission pressure head, a force transmission plane is arranged on one of the force transmission pressure head and the piston, and a force transmission ball head in point contact fit with the force transmission plane is arranged on the other part.

2. The force standard of claim 1, wherein: a sealing ring is arranged between the cylinder body and the piston.

3. The force standard of claim 1, wherein: the force transmission ball head is arranged on the force transmission pressure head, and the force transmission plane is formed by the upper end surface of the piston.

4. The force standard of any one of claims 1~3, wherein: the pressure head connection structure comprises a guide rail arranged at the upper end of the force transmission pressure head and extending along the left-right direction, the pressure head connection structure further comprises a left moving block and a right moving block which are assembled on the guide rail in a guiding and moving mode, the upper ends of the left moving block and the right moving block are provided with T-shaped connectors which are assembled in T-shaped grooves at the lower end of the pressure head in a sliding mode along the front-back direction, and the force standard device further comprises an interval adjusting mechanism used for adjusting the interval between the left moving block and the right moving block.

5. The force standard of claim 4, wherein: the distance adjusting mechanism comprises a left mounting plate and a right mounting plate which are arranged at left and right intervals, the left mounting plate and the right mounting plate are fixed at the upper end of a force transmission pressure head, the distance adjusting mechanism further comprises a transmission lead screw which is rotatably assembled on the left mounting plate and the right mounting plate and extends along the left and right directions, the transmission lead screw is connected with a left moving block through a left thread, the transmission lead screw is connected with a right moving block through a right thread, and the thread turning directions of the left thread and the right thread are opposite.

6. The force standard of claim 5, wherein: one end of the transmission screw is fixed with a hand wheel which is used for holding and rotating by an operator.