WO2012155655A1 - High precision stretching force sensor - Google Patents

High precision stretching force sensor Download PDF

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Publication number
WO2012155655A1
WO2012155655A1 PCT/CN2012/072689 CN2012072689W WO2012155655A1 WO 2012155655 A1 WO2012155655 A1 WO 2012155655A1 CN 2012072689 W CN2012072689 W CN 2012072689W WO 2012155655 A1 WO2012155655 A1 WO 2012155655A1
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WO
WIPO (PCT)
Prior art keywords
neck
cylinder
load cell
blind holes
cross
Prior art date
Application number
PCT/CN2012/072689
Other languages
French (fr)
Chinese (zh)
Inventor
归永
Original Assignee
永正传感(杭州)有限公司
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Publication date
Application filed by 永正传感(杭州)有限公司 filed Critical 永正传感(杭州)有限公司
Publication of WO2012155655A1 publication Critical patent/WO2012155655A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
    • G01G3/1402—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01G3/1408—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric

Definitions

  • the invention relates to a pull weighing load cell. Background technique
  • the conventional pull-plate load cell has a column body as a main body, and a through hole is formed in a middle portion of the column body, and both ends of the column body have connection holes symmetric with respect to the through hole, and the strain gauge is attached to the peripheral wall of the through hole.
  • This pull-plate load cell can be used for pull-type force measurement. In order to obtain good sensitivity and overload factor, the pull-plate load cell has a longer and heavier length. Even so, its overload strength is only
  • the technical problem to be solved by the present invention is to provide a pull type load cell for improving the accuracy, overload strength and weight of the conventional pull plate load cell.
  • the present invention adopts the following technical solution: it comprises a cylinder, the middle portion of the cylinder is provided with two symmetrical blind holes, and the cylinder has a symmetrical neck with respect to the blind hole in the longitudinal direction, and the cylinder A symmetrical or asymmetrical connecting body is provided on the outer side of the neck with respect to the blind hole, and the neck dimension in the width direction of the cylinder is smaller than the diameter of the blind hole in the width direction of the cylinder.
  • the strain gauge of the sensor is attached to the bottom surface of the blind hole.
  • the connector is a connector having a connection structure that can accept tensile force.
  • the connecting structure is a hole, an internal thread or an external thread or a connecting structure for snapping or any connection that can transmit a tensile force, which is symmetrical or asymmetrical.
  • the connecting structure in the asymmetrical connecting body is different, for example, the connecting structure in the connecting body at one end is an internal thread, and the connecting structure in the connecting body at the other end is an external thread, and the connecting structure in the connecting body at one end is The connection structure in the connection body at the other end is an external thread.
  • the neck is a neck of an even polygon having a circular, elliptical or symmetrical cross-sectional shape formed by cutting a symmetrical groove at a position where the neck of the cylinder is located or cutting for four weeks.
  • the cross-sectional shape of the neck is a circular, elliptical or symmetrical even polygon.
  • the cross-sectional shape of the cylinder is a circular, elliptical or symmetrical even polygon. Due to the technical solution of the present invention, the blind hole and the neck are combined, so that after the tension of the sensor is pulled, the pulling force is transmitted to the outer ring of the blind hole through the neck, and the deformation of the outer ring causes the bottom wall of the middle blind hole to be longitudinally stretched. Compressed, it provides a very ideal tensile and compressive stress distribution for strain gages. It has higher sensitivity than traditional pull plate load cell, 3mV/V or above, total height, small weight, over 400% overload factor, and 0IML-compliant C3. The advantages of certification. DRAWINGS
  • FIG. 1 is a front elevational view of Embodiment 1 of the present invention.
  • Figure 2 is a left side cross-sectional view of Figure 1.
  • Figure 3 is a front elevational view of Embodiment 2 of the present invention.
  • Figure 4 is a front elevational view of Embodiment 3 of the present invention.
  • Figure 5 is a front elevational view of Embodiment 4 of the present invention.
  • Figure 6 is a front elevational view of Embodiment 5 of the present invention.
  • Figure 7a is one of the cross-sectional views of the neck of a square cylinder.
  • Figure 7b is one of the cross-sectional views of the neck of a square cylinder.
  • Figure 7c is one of the cross-sectional views of the neck of a square cylinder.
  • Figure 7d is one of the cross-sectional views of the neck of a square cylinder.
  • Figure 8a is one of the cross-sectional views of the neck of a circular cylinder.
  • Figure 8b is one of the cross-sectional views of the neck of a circular cylinder.
  • Figure 8c is one of the cross-sectional views of the neck of a circular cylinder.
  • Figure 8d is one of the cross-sectional views of the neck of a circular cylinder.
  • Figure 9a is one of the cross-sectional views of the neck of the elliptical cylinder.
  • Figure 9b is one of the cross-sectional views of the neck of the elliptical cylinder.
  • Figure 9c is one of the cross-sectional views of the neck of the elliptical cylinder.
  • Figure 9d is one of the cross-sectional views of the neck of the elliptical cylinder.
  • Figure 10a is one of the cross-sectional views of the neck of a hexagonal cylinder.
  • Figure 10b is one of the cross-sectional views of the neck of the hexagonal cylinder.
  • Figure 10c is one of the cross-sectional views of the neck of the hexagonal cylinder.
  • Figure 10d is one of the cross-sectional views of the neck of the hexagonal cylinder. detailed description
  • Embodiment 1 Referring to Figures 1 and 2.
  • the invention comprises a cylinder C, the middle portion of the cylinder is provided with two symmetrical blind holes 11, and the cylinder C has a symmetrical neck with respect to the blind holes 11, 12 in the longitudinal direction. 21, 22, the cylinder C has a symmetrical or asymmetrical connecting body 41-1, 41-2 on the outer side of the neck 21, 22 with respect to the blind hole, the connecting body being a connecting structure having an acceptable tensile force
  • the connecting structure is a hole H.
  • the neck size in the width direction of the cylinder C is smaller than the diameter of the blind holes 11, 12.
  • the strain gauge 5 of the sensor is attached to the bottom surface 3 of the blind hole.
  • the neck is cut by a symmetrical groove 6 at the position of the neck of the cylinder or a cross-sectional shape formed by cutting around.
  • the neck of a circular, elliptical or symmetrical even polygon.
  • the neck cross-sectional shape is a circular, elliptical or symmetrical even polygon.
  • the cross-sectional shape of the neck is square 23-4, circular 23-1, elliptical 23-2 or other symmetrical even-numbered polygons 23-3, such as hexagons;
  • the cross-sectional shape of the cylinder is circular, the cross-sectional shape of the neck is square 24-4, circular 24-1, elliptical 24-2 or other symmetrical even-numbered polygons 24-3;
  • the cross-sectional shape is elliptical, the cross-sectional shape of the neck is square 25-4, circular 25-1, elliptical 25-2 or other symmetric even-sided polygon 25-3.
  • the cross-sectional shape of the cylinder is a symmetrical polygon
  • the cross-sectional shape of the neck is square 26-4, circular 26-1, elliptical 26-2 or other symmetric even-sided polygon 26-3.
  • Embodiment 2 referring to Figure 3.
  • connection structure in the connecting body is the internal thread 42-1, 42-2.
  • the other structure of this embodiment is the same as that of the first embodiment.
  • Embodiment 3 referring to FIG. 4
  • the connecting structure in the connecting body is the external thread 43-1, 43-2.
  • the other structure of this embodiment is the same as that of the first embodiment.
  • the connecting structure in the connecting body is a step 44-1, 44-2 with a small outer small head and a small joint, and constitutes a snap-fit connection structure, which facilitates the use of two outer circles to buckle outwardly.
  • the other structure of this embodiment is the same as that of Embodiment 1.
  • the connecting structure in the connecting body is a connecting structure that can transmit the pulling forces 45-1, 45-2 through the neck.
  • the other structure of this embodiment is the same as that of Embodiment 1.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Force In General (AREA)

Abstract

A high precision stretching force sensor has a column body (C). The middle part of the column body (C) is provided with two symmetrical blind holes (11, 12). At the length direction, the column body (C) is provided with symmetrical neck parts (21, 22) relative to the blind holes (11, 12). At the out side of the neck parts (21, 22), the column body (C) is provided with symmetrical or asymmetrical connecting parts (41-1, 41-2) relative to the blind holes (11, 12). The size of the neck parts (21, 22) is lesser than the diameter of the blind holes (11, 12) along the width direction of the column body (C). With the combination of the blind holes (11, 12) and the neck parts (21, 22), a stretching force can be transferred to the outside of the blind holes (11, 12) through the neck parts (21, 22) when the sensor is stretched. The bottom of the middle blind holes (11, 12) is stretched longitudinally and compressed transversely under the deformation of the outside thereof, thus providing an ideal stretching and compression stress distribution for a strain gauge. The above sensor has the advantages of higher sensitivity than a conventional stretching plate force sensor, which is 3mV/V or above, a low total height, a light weight, and an overload coefficient above 400%. The above sensor also accords with the C3 authentication of the OIML.

Description

一种高精度拉式测力传感器 技术领域  High-precision pull type load cell technology
本发明涉及拉式称重测力传感器。 背景技术  The invention relates to a pull weighing load cell. Background technique
传统的拉板测力传感器由柱体为主体， 柱体的中部设有通孔， 柱 体的两端各有相对于通孔对称的连接孔， 应变片贴在通孔的周壁。这 种拉板测力传感器可用于拉式测力， 为了获得良好的灵敏度、过载系 数， 这种拉板测力传感器的长度较长且重， 即便如此， 其过载强度仅 The conventional pull-plate load cell has a column body as a main body, and a through hole is formed in a middle portion of the column body, and both ends of the column body have connection holes symmetric with respect to the through hole, and the strain gauge is attached to the peripheral wall of the through hole. This pull-plate load cell can be used for pull-type force measurement. In order to obtain good sensitivity and overload factor, the pull-plate load cell has a longer and heavier length. Even so, its overload strength is only
300%左右， 精度也不能令人满意。 发明内容 About 300%, the accuracy is not satisfactory. Summary of the invention
本发明所要解决的技术问题是提供一种拉式测力传感器，提高传 统拉板测力传感器的精度、 过载强度， 降低其重量。 为此， 本发明采 用以下技术方案：它包括柱体，所述柱体的中部设有对称的两个盲孔， 柱体在长度方向上相对于所述盲孔具有对称的颈部，柱体在颈部的外 侧相对于所述盲孔具有对称或不对称的连接体， 在柱体宽度方向上， 在柱体宽度方向上的颈部尺寸小于盲孔的直径。  The technical problem to be solved by the present invention is to provide a pull type load cell for improving the accuracy, overload strength and weight of the conventional pull plate load cell. To this end, the present invention adopts the following technical solution: it comprises a cylinder, the middle portion of the cylinder is provided with two symmetrical blind holes, and the cylinder has a symmetrical neck with respect to the blind hole in the longitudinal direction, and the cylinder A symmetrical or asymmetrical connecting body is provided on the outer side of the neck with respect to the blind hole, and the neck dimension in the width direction of the cylinder is smaller than the diameter of the blind hole in the width direction of the cylinder.
所述传感器的应变片贴在盲孔孔底面上。  The strain gauge of the sensor is attached to the bottom surface of the blind hole.
所述连接体为具有可接受拉力的连接结构的连接体。 所述连接结构为孔、内螺紋或外螺紋或或用于卡接的连接结构或 任意可以传递拉力的连接方式， 对称或不对称。 The connector is a connector having a connection structure that can accept tensile force. The connecting structure is a hole, an internal thread or an external thread or a connecting structure for snapping or any connection that can transmit a tensile force, which is symmetrical or asymmetrical.
所述不对称的连接体中的连接结构不相同， 比如： 一端的连接体 中的连接结构为内螺紋， 另一端的连接体中的连接结构为外螺紋， 一 端的连接体中的连接结构为孔，另一端的连接体中的连接结构为外螺 紋。  The connecting structure in the asymmetrical connecting body is different, for example, the connecting structure in the connecting body at one end is an internal thread, and the connecting structure in the connecting body at the other end is an external thread, and the connecting structure in the connecting body at one end is The connection structure in the connection body at the other end is an external thread.
所述颈部为由在柱体的颈部所处位置切割对称的槽或者切割四 周形成的横截面外形为圆形、 椭圆形或对称的偶数多边形的颈部。  The neck is a neck of an even polygon having a circular, elliptical or symmetrical cross-sectional shape formed by cutting a symmetrical groove at a position where the neck of the cylinder is located or cutting for four weeks.
所述颈部横截面外形为圆形、 椭圆形或对称的偶数多边形。  The cross-sectional shape of the neck is a circular, elliptical or symmetrical even polygon.
所述柱体的横截面外形为圆形、 椭圆形或对称的偶数多边形。 由于采用本发明的技术方案， 盲孔和颈部的结合， 使传感器的受 拉后， 拉力通过颈部传递到盲孔的外圈， 外圈变形导致中间盲孔底壁 纵向被拉伸，横向被压缩，给应变计提供了非常理想的拉压应力分布， 具有比传统拉板测力传感器更高灵敏度， 3mV/ V 或以上， 总高度小 重量轻、 超过 400%过载系数、 符合 0IML的 C3认证的优点。 附图说明  The cross-sectional shape of the cylinder is a circular, elliptical or symmetrical even polygon. Due to the technical solution of the present invention, the blind hole and the neck are combined, so that after the tension of the sensor is pulled, the pulling force is transmitted to the outer ring of the blind hole through the neck, and the deformation of the outer ring causes the bottom wall of the middle blind hole to be longitudinally stretched. Compressed, it provides a very ideal tensile and compressive stress distribution for strain gages. It has higher sensitivity than traditional pull plate load cell, 3mV/V or above, total height, small weight, over 400% overload factor, and 0IML-compliant C3. The advantages of certification. DRAWINGS
图 1为本发明所提供的实施例 1的主视图。  BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view of Embodiment 1 of the present invention.
图 2为图 1的左视局剖图。  Figure 2 is a left side cross-sectional view of Figure 1.
图 3为本发明所提供的实施例 2的主视图。  Figure 3 is a front elevational view of Embodiment 2 of the present invention.
图 4为本发明所提供的实施例 3的主视图。  Figure 4 is a front elevational view of Embodiment 3 of the present invention.
图 5为本发明所提供的实施例 4的主视图。 图 6为本发明所提供的实施例 5的主视图。 Figure 5 is a front elevational view of Embodiment 4 of the present invention. Figure 6 is a front elevational view of Embodiment 5 of the present invention.
图 7a为方形柱体颈部的横截面视图之一。  Figure 7a is one of the cross-sectional views of the neck of a square cylinder.
图 7b为方形柱体颈部的横截面视图之一。  Figure 7b is one of the cross-sectional views of the neck of a square cylinder.
图 7c为方形柱体颈部的横截面视图之一。  Figure 7c is one of the cross-sectional views of the neck of a square cylinder.
图 7d为方形柱体颈部的横截面视图之一。  Figure 7d is one of the cross-sectional views of the neck of a square cylinder.
图 8a为圆形柱体颈部的横截面视图之一。  Figure 8a is one of the cross-sectional views of the neck of a circular cylinder.
图 8b为圆形柱体颈部的横截面视图之一。  Figure 8b is one of the cross-sectional views of the neck of a circular cylinder.
图 8c为圆形柱体颈部的横截面视图之一。  Figure 8c is one of the cross-sectional views of the neck of a circular cylinder.
图 8d为圆形柱体颈部的横截面视图之一。  Figure 8d is one of the cross-sectional views of the neck of a circular cylinder.
图 9a为椭圆形柱体颈部的横截面视图之一。  Figure 9a is one of the cross-sectional views of the neck of the elliptical cylinder.
图 9b为椭圆形柱体颈部的横截面视图之一。  Figure 9b is one of the cross-sectional views of the neck of the elliptical cylinder.
图 9c为椭圆形柱体颈部的横截面视图之一。  Figure 9c is one of the cross-sectional views of the neck of the elliptical cylinder.
图 9d为椭圆形柱体颈部的横截面视图之一。  Figure 9d is one of the cross-sectional views of the neck of the elliptical cylinder.
图 10a为六边形柱体颈部的横截面视图之一。  Figure 10a is one of the cross-sectional views of the neck of a hexagonal cylinder.
图 10b为六边形柱体颈部的横截面视图之一。  Figure 10b is one of the cross-sectional views of the neck of the hexagonal cylinder.
图 10c为六边形柱体颈部的横截面视图之一。  Figure 10c is one of the cross-sectional views of the neck of the hexagonal cylinder.
图 10d为六边形柱体颈部的横截面视图之一。 具体实施方式  Figure 10d is one of the cross-sectional views of the neck of the hexagonal cylinder. detailed description
实施例 1， 参照图 1、 2。  Embodiment 1 Referring to Figures 1 and 2.
本发明包括柱体 C , 所述柱体的中部设有对称的两个盲孔 11、 ， 柱体 C在长度方向上相对于所述盲孔 11、 12具有对称的颈部 21、 22， 柱体 C在颈部 21、 22的外侧相对于所述盲孔具有对称或 不对称的连接体 41-1、 41-2， 所述连接体为具有可接受拉力的连接 结构的连接体， 在本实施例中， 所述连接结构为孔 H。 在柱体 C 宽 度方向上的颈部尺寸小于盲孔 11、 12的直径。 The invention comprises a cylinder C, the middle portion of the cylinder is provided with two symmetrical blind holes 11, and the cylinder C has a symmetrical neck with respect to the blind holes 11, 12 in the longitudinal direction. 21, 22, the cylinder C has a symmetrical or asymmetrical connecting body 41-1, 41-2 on the outer side of the neck 21, 22 with respect to the blind hole, the connecting body being a connecting structure having an acceptable tensile force In the embodiment, the connecting structure is a hole H. The neck size in the width direction of the cylinder C is smaller than the diameter of the blind holes 11, 12.
所述传感器的应变片 5贴在盲孔孔底面 3上。  The strain gauge 5 of the sensor is attached to the bottom surface 3 of the blind hole.
如图 1、 图 7a-7d、 8a-8d、 9a-9d、 10a-10d所示， 所述颈部 由在柱体的颈部所处位置切割对称的槽 6 或者切割四周形成的横截 面外形为圆形、椭圆形或对称的偶数多边形的颈部。所述颈部横截面 外形为圆形、椭圆形或对称的偶数多边形。柱体的横截面外形为方形 时， 颈部的横截面外形为方形 23-4、 圆形 23-1、椭圆形 23-2或其它 对称的偶数边多边形 23-3， 比如六边形； 当柱体的横截面外形为圆 形时， 颈部的横截面外形为方形 24-4、 圆形 24-1、 椭圆形 24-2或其 它对称的偶数边多边形 24-3; 当柱体的横截面外形为椭圆形时， 颈 部的横截面外形为方形 25-4、 圆形 25-1、椭圆形 25-2或其它对称的 偶数边多边形 25-3。 当柱体的横截面外形为对称的多边形时， 颈部 的横截面外形为方形 26-4、 圆形 26-1、椭圆形 26-2或其它对称的偶 数边多边形 26-3。 实施例 2， 参照图 3.  As shown in Fig. 1, Fig. 7a-7d, 8a-8d, 9a-9d, 10a-10d, the neck is cut by a symmetrical groove 6 at the position of the neck of the cylinder or a cross-sectional shape formed by cutting around. The neck of a circular, elliptical or symmetrical even polygon. The neck cross-sectional shape is a circular, elliptical or symmetrical even polygon. When the cross-sectional shape of the cylinder is square, the cross-sectional shape of the neck is square 23-4, circular 23-1, elliptical 23-2 or other symmetrical even-numbered polygons 23-3, such as hexagons; When the cross-sectional shape of the cylinder is circular, the cross-sectional shape of the neck is square 24-4, circular 24-1, elliptical 24-2 or other symmetrical even-numbered polygons 24-3; When the cross-sectional shape is elliptical, the cross-sectional shape of the neck is square 25-4, circular 25-1, elliptical 25-2 or other symmetric even-sided polygon 25-3. When the cross-sectional shape of the cylinder is a symmetrical polygon, the cross-sectional shape of the neck is square 26-4, circular 26-1, elliptical 26-2 or other symmetric even-sided polygon 26-3. Embodiment 2, referring to Figure 3.
本实施例中， 所述连接体中的连接结构为内螺紋 42-1、 42-2 本实施例的其它结构和实施例 1相同。 实施例 3， 参照图 4 In this embodiment, the connection structure in the connecting body is the internal thread 42-1, 42-2. The other structure of this embodiment is the same as that of the first embodiment. Embodiment 3, referring to FIG. 4
本实施例中， 所述连接体中的连接结构为外螺紋 43-1、 43-2 本实施例的其它结构和实施例 1相同。 实施例 4， 参照图 5  In the present embodiment, the connecting structure in the connecting body is the external thread 43-1, 43-2. The other structure of this embodiment is the same as that of the first embodiment. Embodiment 4, referring to FIG. 5
本实施例中， 所述连接体中的连接结构为外头大里小的台阶 44-1、 44-2， 构成卡接连接结构， 便于使用 2个外圆扣住向外拉。 本 实施例的其它结构和实施例 1相同。 实施例 5， 参照图 6  In this embodiment, the connecting structure in the connecting body is a step 44-1, 44-2 with a small outer small head and a small joint, and constitutes a snap-fit connection structure, which facilitates the use of two outer circles to buckle outwardly. The other structure of this embodiment is the same as that of Embodiment 1. Embodiment 5, referring to FIG. 6
本实施例中，所述连接体中的连接结构为通过颈部任意可以传递 拉力 45-1、 45-2的连接结构。本实施例的其它结构和实施例 1相同。  In this embodiment, the connecting structure in the connecting body is a connecting structure that can transmit the pulling forces 45-1, 45-2 through the neck. The other structure of this embodiment is the same as that of Embodiment 1.

Claims

权利要求书 Claim
1、 一种高精度拉式测力传感器 ， 包括柱体， 其特征在于所述柱 体的中部设有对称的两个盲孔，柱体在长度方向上相对于所述盲孔具 有对称的颈部，柱体在颈部的外侧相对于所述盲孔具有对称或不对称 的连接体， 在柱体宽度方向上的颈部尺寸小于盲孔的直径。 A high-precision pull type load cell comprising a cylinder, wherein the middle portion of the cylinder is provided with two symmetric blind holes, and the cylinder has a symmetric neck with respect to the blind hole in the longitudinal direction. The cylinder has a symmetric or asymmetrical connecting body on the outer side of the neck with respect to the blind hole, and the neck size in the width direction of the cylinder is smaller than the diameter of the blind hole.
2、 如权利要求 1所述的高精度拉式测力传感器， 其特征在于所 述传感器的应变片贴在盲孔孔底面上。  2. The high precision pull type load cell according to claim 1, wherein the strain gauge of the sensor is attached to the bottom surface of the blind hole.
3、 如权利要求 1所述的高精度拉式测力传感器， 其特征在于所 述连接体为具有可接受拉力的连接结构的连接体。  A high-precision pull type load cell according to claim 1, wherein said connecting body is a connecting body having a connecting structure capable of receiving a tensile force.
4、 如权利要求 3所述的高精度拉式测力传感器， 其特征在于所 述连接结构为孔、 内螺紋、 外螺紋或用于卡接的连接结构。  A high-precision pull type load cell according to claim 3, wherein said connecting structure is a hole, an internal thread, an external thread or a connecting structure for snapping.
5、 如权利要求 3所述的高精度拉式测力传感器， 其特征在于所 述不对称的连接体中的连接结构不相同。  The high-precision pull type load cell according to claim 3, wherein the connection structure in the asymmetrical connector is different.
6、 如权利要求 1所述的高精度拉式测力传感器， 其特征在于所 述颈部为由在柱体的颈部所处位置切割对称的槽或者切割四周形成 的横截面外形为圆形、 椭圆形或对称的偶数多边形的颈部。  6. The high-precision pull type load cell according to claim 1, wherein the neck portion is formed by a circularly shaped groove formed at a position of a neck portion of the cylinder or a cross-sectional shape formed by cutting the circumference. The elliptical or symmetrical even polygon neck.
7、 如权利要求 3所述的高精度拉式测力传感器， 其特征在于所 述颈部横截面外形为圆形、 椭圆形或对称的偶数多边形。  7. The high precision pull type load cell according to claim 3, wherein the neck cross-sectional shape is a circular, elliptical or symmetrical even polygon.
8、 如权利要求 1、 2、 3、 4、 5、 6或 7所述的高精度拉式测力 传感器， 其特征在于所述柱体的横截面外形为圆形、椭圆形或对称的 偶数多边形。  8. The high precision pull type load cell according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the cross-sectional shape of the cylinder is circular, elliptical or symmetrical even number Polygon.
PCT/CN2012/072689 2011-05-18 2012-03-21 High precision stretching force sensor WO2012155655A1 (en)

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