CN105004478A - Force arm lever system applied to torque standard machine and torque standard machine - Google Patents

Abstract

The invention discloses a force arm lever system applied to a torque standard machine and a torque standard machine. The force arm lever system applied to the torque standard machine comprises a main shaft, a bearing, a bearing pedestal, a front mean beam, a rear main beam, edge cutter fixing pieces and an edge cutter, wherein the main shaft is installed on the bearing pedestal through the bearing, the front main beam and the rear main beam, which are arranged in a mutually parallel mode, are located at two sides of the bearing pedestal respectively, and the main shaft penetrates through a center hole of the front main beam and a center hole of the rear main beam; the front main beam and the rear main beam form a force arm lever, the force arm lever takes the main shaft as a rotating shaft, the front main beam and the rear main beam are connected to two sides of a connecting piece assembly respectively so as to strengthen the force arm lever; the two edge cutter fixing pieces are located at the left end and the right end of the force arm lever respectively, two sides of each edge cutter fixing piece are fixed to the front main beam and the rear main beam respectively, the edge cutter fixing pieces are vertical with the front main beam and the rear main beam, and the edge cutter is fixed on the edge cutter fixing piece with a blade facing upward. The torque standard machine can be enabled to realize wide-range high-precision measurement by applying the force arm lever system disclosed by the invention.

Description

The moment arm lever system used in the torque standard machine and the torque standard machine

technical field

The invention relates to the field of torque detection and calibration, and more particularly relates to a moment arm lever system used in a torque standard machine and a torque standard machine.

Background technique

Torque sensors can be used to detect torsional moments on various rotating or non-rotating mechanical components. Leveraged torque can be leveraged to amplify the torque to calibrate the torque sensor. With the development of science and technology, more and more large-range, high-precision torque sensors have appeared in the industrial field, but the existing torque standard machine is difficult to meet the requirements of its calibration.

After in-depth research, the inventor found that the structural stability of the moment arm lever is very important for realizing a torque standard machine capable of large-range and high-precision measurement.

Contents of the invention

The invention proposes a moment arm lever system with a high stability structure that can be used in a torque standard machine. The invention also proposes a torque standard machine adopting the lever system of the moment arm.

According to one aspect of the present invention, a kind of moment arm lever system used in the torque standard machine is proposed, the moment arm lever system includes: main shaft, bearing, bearing seat, front main beam, rear main beam, side knife fixing part, Side cutter; the main shaft is installed on the bearing seat through the bearing, the front main beam and the rear main beam arranged parallel to each other are located on both sides of the bearing seat, and the main shaft passes through the center hole of the front main beam and the center hole of the rear main beam; the front main beam The arm lever is composed of the main beam and the rear main beam, and the main beam is used as the rotation axis of the lever. The front main beam and the rear main beam are respectively connected to both sides of the connector assembly to strengthen the arm lever; the two side knives are fixed The pieces are respectively located at the left and right ends of the lever of the moment arm. The two sides of each side knife fixing piece are respectively fixed to the front main beam and the rear main beam, and the side knife fixing piece is perpendicular to the front main beam and the rear main beam. The upward direction of the blade is fixed on the side knife holder.

The connector assembly may include four connector plates. The four connecting plates can be divided into two groups located on both sides of the main shaft, and each group can include two connecting plates. The two sets of connecting plates may be symmetrical with respect to a vertical plane passing through the axis of the main shaft, and the two connecting plates in each set may be symmetrical with respect to a horizontal plane passing through the axis of the main shaft. Any two connecting plates located at diagonal positions among the four connecting plates may be symmetrical with respect to the axis of the main shaft.

Both sides of each side knife fixing piece can have a stepped connection structure. The two sides of each side knife fixing piece can be respectively fixed to the front main beam and the rear main beam through the stepped connection structure.

Both side knife holders may have outward projections. A side knife may be mounted on the raised upper surface.

The moment arm lever system may also include a suspension. The hanger can have a knife support matched with the edge of the side knife, and the hanger can have a weight connection part.

The moment arm lever system may also include a front counterweight member, a right counterweight member and a left counterweight member. The front counterweight component can be installed on the main shaft outside the front main beam through the threaded hole on the inner wall, and the thread on the inner wall of the hole can be matched with the thread on the corresponding position on the main shaft. The right counterweight part can be installed on the inward side of the side knife fixture at the right end of the moment arm lever by a screw rod. The left counterweight part can be installed on the inward side of the side knife fixture at the left end of the moment arm lever by a screw rod.

The bearings may be air bearings.

Thickness adjusting gaskets may be provided between both sides of the bearing seat and the front main beam and the rear main beam.

The front main beam, rear main beam, edge knife mount and connector assemblies may be constructed of Invar.

According to another aspect of the present invention, a torque standard machine is also proposed, which adopts the above-mentioned moment arm lever system.

Aspects of the present invention use the quadrilateral structure formed by the front and rear main beams, connecting plates, side knife fixing parts, etc. to obtain a stable and firm moment arm lever system that can be used in the torque standard machine, so that the torque standard machine can be used in a large number of range, high-precision measurement.

Description of drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing the exemplary embodiments of the present disclosure in more detail with reference to the accompanying drawings, wherein, in the exemplary embodiments of the present disclosure, the same reference numerals generally represent same parts.

FIG. 1 shows a front view of a moment arm lever system according to an exemplary embodiment of the present disclosure.

FIG. 2 shows a top view of the moment arm lever system shown in FIG. 1 .

FIG. 3 shows a partial schematic diagram of the contact portion between the side knife 2 and the knife support 3 in the moment arm lever system shown in FIG. 1 .

Fig. 4 shows a partial schematic view of the thickness adjusting shim in the moment arm lever system shown in Fig. 1 .

Detailed ways

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the present disclosure, if there is no clear contrary understanding, the terms "inside and outside" refer to directions relative to the lever of the moment arm, wherein "inside" refers to a direction toward the lever of the moment arm, and "outside" refers to a direction away from the lever of the moment arm; "Horizontal, horizontal", "vertical, straight", "upper, lower", "left, right" refer to the direction of the front view shown in Figure 1; relative position.

Fig. 1 shows a front view of a moment arm lever system according to an exemplary embodiment of the present disclosure, wherein the contact part of the side knife 2 and the knife support 3 in the left half and the part corresponding to the connecting piece 8 are shown in a cross-sectional view. form is shown. FIG. 2 shows a top view of the moment arm lever system shown in FIG. 1 .

As shown in FIGS. 1 and 2 , the moment arm lever system includes a main shaft 9 , a bearing seat 4 , a bearing, a front main beam 6 , a rear main beam 7 , a side knife fixing part 5 , and a side knife 2 . The main shaft 9 is installed on the bearing housing 4 through bearings, the front main beam 6 and the rear main beam 7 arranged parallel to each other are located on both sides of the bearing housing 4, and the main shaft 9 passes through the center hole of the front main beam 6 and the center of the rear main beam 7 hole. The front main beam 6 and the rear main beam 7 form a moment arm lever, and this moment arm lever takes the main shaft 9 as the axis of rotation. The front main beam 6 and the rear main beam 7 are respectively connected to both sides of the connector assembly to reinforce the moment arm lever. The two side knife fixing parts 5 are respectively located at the left and right ends of the lever of the moment arm. 6 is perpendicular to back girder 7. The side knife 2 is fixed on the side knife fixing member 5 with the blade facing up. The front main beam 6, the rear main beam 7 and the side knife fixing parts 5 on both sides can form a firm quadrilateral structure, and the structure can be further improved by connecting the connector assembly between the front main beam 6 and the rear main beam 7. Reinforced to make it firm and stable and not easily deformed.

In this exemplary embodiment, the connector assembly may include four connector plates 8 . The four connecting plates 8 can be divided into two groups located on both sides of the main shaft 9 , and each group can include two connecting plates 8 . The two groups of connecting plates 8 may be symmetrical with respect to the vertical plane passing the axis of the main shaft 9 , and the two connecting plates 8 in each group may be symmetrical with respect to the horizontal plane of the drawing line passing through the main shaft 9 . Any two connecting plates located at diagonal positions among the four connecting plates 8 may be centrally symmetrical with respect to the axis of the main shaft 9 . The inventor has proved through repeated deduction and experiments that the moment arm lever system adopting this reinforcement method has very high structural stability.

In addition, as shown in Figure 2, both sides of each side knife fixing part 5 have a stepped connection structure, and the two sides of each side knife fixing part 5 are respectively fixed to the front main beam 6 and the rear main beam 6 through the stepped connection structure. Main beam 7. Compared with the traditional "L-shaped" connection structure, this connection structure can have a higher degree of stability.

As shown in FIG. 1 , the two side knife fixing parts 5 located at the left and right ends of the lever of the force arm can both have outward protrusions, and the side knife 2 can be installed on the upper surface of the protrusions. This structure is more convenient for the force applying part to apply force to the moment arm. For example, the protrusion may be a hook-shaped protrusion, and the side knife 2 may be mounted on the upper surface of the hook-shaped portion.

As shown in FIG. 2 , the lever system of the moment arm can also include a suspension 1 that can be placed on the side knife fixing elements 5 at both ends of the lever of the moment arm. The hanger 1 may have a knife support 3 that matches the edge of the side knife 2, and the side knife 2 and the knife support 3 may be in line contact to improve calibration sensitivity. The suspension 1 may also have weight connection means. Those skilled in the art can arrange any suitable weight connection parts according to needs, for example, the claw hook as shown in FIG. 1 .

The moment arm lever system can also include a counterweight component, which can be used to adjust the position of the center of mass of the moment arm lever system. In the exemplary embodiment shown in FIG. 2 , the moment arm lever system may include a front counterweight part 11 , a right counterweight part 12 and a left counterweight part 15 . The front counterweight component 11 can be installed on the main shaft 9 outside the front main beam 6 by a threaded hole on the inner wall. The front counterweight member 11 can be moved back and forth along the main shaft 9 by rotating it. The right counterweight part 12 can be installed on the inward side of the side knife holder 5 at the right end of the lever of the force arm through the screw rod 13, and the left counterweight part 15 can be installed on the side knife holder 5 at the left end of the lever of the moment arm through the screw rod 16. side. Left and right counterweight parts 15, 12 can move left and right along respective screw rods 16, 13.

The bearing used in this exemplary embodiment may be an air bearing to reduce friction and improve calibration accuracy and measurement range.

As shown in Fig. 2, in this exemplary embodiment, there may be a thickness adjusting gasket 10 between both sides of the bearing housing 4 and the front main beam 6 and the rear main beam 7, and the thickness adjusting gasket 10 may be adjusted (for example, polished). To adjust the distance between the bearing seat 4 and the front main beam 6 and the rear main beam 7.

The main frame structure in this exemplary embodiment, such as the front main beam 6, the rear main beam 7, the side knife fixing member 5 and the connector assembly may all be made of invar. Invar alloy has the characteristic of small expansion coefficient, which can improve the thermal stability of the structure of the moment arm lever system.

FIG. 3 shows a partial schematic diagram of the contact portion between the side knife 2 and the knife support 3 in the moment arm lever system shown in FIG. 1 . It can be seen that the side knife 2 and the knife support 3 can be in line contact, and this structure is conducive to improving the sensitivity of calibration.

FIG. 4 shows a partial schematic view of the thickness adjusting gasket 10 in the moment arm lever system shown in FIG. 1 , which is a cross-sectional view. There can be a thickness adjusting gasket 10 between the two sides of the bearing seat 4 and the front and rear main beams, so as to adjust the distance between the bearing seat 4 and the front and rear main beams.

The present disclosure also discloses a torque standard machine adopting the above-mentioned moment arm lever system.

Having described various embodiments of the present disclosure above, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principle of each embodiment, practical application or technical improvement in the market, or to enable other ordinary skilled in the art to understand each embodiment disclosed herein.

Claims (10)

1. one kind is used in the arm lever system in standard torquer, it is characterized in that, this arm lever system comprises: main shaft (9), bearing, bearing seat (4), front girder (6), rear girder (7), limit cutter fixture (5), limit cutter (2);

Main shaft (9) is arranged on bearing seat (4) by bearing, the front girder (6) be set parallel to each other and rear girder (7) are positioned at bearing seat (4) both sides, and the center pit of main shaft (9) through front girder (6) and the center pit of rear girder (7);

Front girder (6) and rear girder (7) composition arm lever, described arm lever with main shaft (9) for rotation axis, front girder (6) and rear girder (7) are connected to the both sides of web member assembly respectively, to reinforce described arm lever;

Two limits cutter fixture (5) lay respectively at the two ends, left and right of arm lever, the both sides of each limit cutter fixture (5) are fixed to front girder (6) and rear girder (7) respectively, and limit cutter fixture (5) and front girder (6) and rear girder (7) perpendicular, limit cutter (2) is fixed on limit cutter fixture (5) with blade direction upwards.

2. the arm lever system be used in standard torquer according to claim 1, it is characterized in that, described web member assembly comprises four web joints (8), described four web joints (8) are divided into two groups that are positioned at main shaft (9) both sides, often group comprises two web joints (8), these two groups of web joints (8) are symmetrical relative to the vertical plane through main shaft (9) axis, and two web joints (8) often in group are symmetrical relative to the surface level through main shaft (9) axis, any two web joints (8) being positioned at diagonal position in described four web joints (8) are symmetrical relative to main shaft (9) axis centre.

3. the arm lever system be used in standard torquer according to claim 1, it is characterized in that, the both sides of each limit cutter fixture (5) have step syndeton, and the both sides of each limit cutter fixture (5) are fixed to front girder (6) and rear girder (7) respectively by described step syndeton.

4. the arm lever system be used in standard torquer according to claim 1, is characterized in that, two limits cutter fixture (5) all have outside projection, and limit cutter (2) is arranged on the upper surface of described projection.

5. the arm lever system be used in standard torquer according to claim 1, it is characterized in that, this arm lever system also comprises suspender (1), suspender (1) has the cutter matched with the blade of limit cutter (2) to hold, and suspender (1) has counterweight link.

6. the arm lever system be used in standard torquer according to claim 1, is characterized in that, this arm lever system also comprises front weight member (11), right weight member (12) and left weight member (15);

Front weight member (11) is arranged on the main shaft (9) in front girder (6) outside by hole threaded on inwall, and the screw thread on this hole inwall matches with the screw thread of the upper corresponding site of main shaft (9);

Right weight member (12) is arranged on inside side, limit cutter fixture (5) of arm lever right-hand member by screw rod (13);

Left weight member (15) is arranged on inside side, limit cutter fixture (5) of arm lever left end by screw rod (16).

7. the arm lever system be used in standard torquer according to claim 1, is characterized in that, described bearing is air bearing.

8. the arm lever system be used in standard torquer according to claim 1, it is characterized in that, bearing seat (4) both sides and there is between front girder (6) and rear girder (7) thickness adjust pad (10).

9. the arm lever system be used in standard torquer according to claim 1, is characterized in that, front girder (6), rear girder (7), limit cutter fixture (5) and web member assembly are made up of invar alloy.

10. a standard torquer, is characterized in that, this standard torquer adopts as the arm lever system be used in standard torquer in claim 1-9 as described in any one.