WO2013139296A1 - 测试指 - Google Patents

测试指 Download PDF

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Publication number
WO2013139296A1
WO2013139296A1 PCT/CN2013/073035 CN2013073035W WO2013139296A1 WO 2013139296 A1 WO2013139296 A1 WO 2013139296A1 CN 2013073035 W CN2013073035 W CN 2013073035W WO 2013139296 A1 WO2013139296 A1 WO 2013139296A1
Authority
WO
WIPO (PCT)
Prior art keywords
test
finger
tip end
groove
connecting ball
Prior art date
Application number
PCT/CN2013/073035
Other languages
English (en)
French (fr)
Inventor
于海源
姚英姿
蔡元佳
Original Assignee
施耐德东芝换流器欧洲公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 施耐德东芝换流器欧洲公司 filed Critical 施耐德东芝换流器欧洲公司
Priority to JP2015500763A priority Critical patent/JP2015515615A/ja
Priority to US14/386,921 priority patent/US20150061716A1/en
Priority to EP13764685.7A priority patent/EP2827096A4/en
Publication of WO2013139296A1 publication Critical patent/WO2013139296A1/zh

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/16Construction of testing vessels; Electrodes therefor
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Measuring instruments characterised by the use of mechanical techniques
    • G01B3/30Bars, blocks, or strips in which the distance between a pair of faces is fixed, although it may be preadjustable, e.g. end measure, feeler strip
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02General constructional details
    • G01R1/04Housings; Supporting members; Arrangements of terminals
    • G01R1/0408Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02General constructional details
    • G01R1/06Measuring leads; Measuring probes
    • G01R1/067Measuring probes
    • G01R1/06711Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
    • G01R1/06733Geometry aspects

Definitions

  • the present invention relates to test fingers, and more particularly to a test finger for determining whether an invasive protection level of an electrical device meets a safety standard. Background technique
  • the method for measuring the distance is to place a finger-shaped rod at a position where measurement is required, and then use a caliper to measure the distance from the tip end portion of the rod to the charging member or the charging wire.
  • the caliper is limited by space and cannot be effectively measured.
  • the engineer has to estimate the distance directly with the eye to determine if the distance is greater than or equal to the minimum safe distance, and the estimated result is sometimes inaccurate.
  • the present invention proposes a test finger that can accurately determine whether the distance is greater than or equal to the minimum safe distance.
  • This test is used in electrical equipment to accurately determine whether the distance between the tip end of the test finger and the uninsulated live parts or the live conductor is greater than or equal to the minimum safe distance.
  • a test finger includes a finger shank portion to which a test portion for distance measurement is connected at a tip end portion of the finger shank portion.
  • the finger lever has the same function as the finger-shaped lever of the prior art.
  • the tip end portion of the finger lever portion abuts against the housing of the electric device, and the test portion directly faces the tip end of the finger rod portion.
  • Test the distance between the part and the uninsulated live parts or live conductors.
  • the length of the test portion can be preset, and the length of the selected test portion is the length of the required minimum safety distance.
  • the free end of the test portion can be in contact with the charged body (ie, the uninsulated live parts or the live conductor), It indicates that the distance is less than or equal to the minimum safety distance, and conversely, if the free end is not accessible to the charged body, It indicates that the distance is greater than the minimum safety distance, and when the distance is greater than or equal to the minimum safety distance, the safety setting standard is met.
  • the charged body ie, the uninsulated live parts or the live conductor
  • the test portion is typically a set of test heads having a length corresponding to a minimum safe distance at different voltage levels in the intrusion protection.
  • the test portion includes a connecting portion connected to the tip end portion of the finger stem portion and a calibration value portion for measuring the length.
  • the requirements for safety distance are not the same.
  • the test head system has different calibration length values, it can meet the test under different voltage levels.
  • the tip end portion of the finger rod portion is provided with a partial spherical groove, and a magnet is fixedly disposed at a bottom portion of the partial spherical groove, and a connecting ball made of a ferromagnetic material is disposed in the partial spherical groove, the connecting ball is in contact with the magnet, and the connecting ball passes through the magnet
  • the magnetic connection is in a partial spherical recess, and a hole for mating with the connecting portion of the test portion is provided on the connecting ball, and the connecting portion of the test portion is inserted in the hole.
  • the connecting portion of the test portion is interference-fitted, snapped or magnetically connected to the hole in the connecting ball.
  • the connecting ball can be freely rotated in a partial spherical groove in the tip end portion of the finger shank portion, so that the test portion inserted in the hole connecting the balls is also within a certain angle due to the free rotation of the connecting ball. Free swing.
  • the direction of the test section can be freely changed, increasing the flexibility of use of the test finger.
  • connection between the test portion and the tip end portion of the finger lever portion is a detachable insertion connection, which facilitates the user to replace the test portion of different calibration lengths according to the actual practical voltage.
  • the connecting portion of the test portion is interference-fitted, snapped or magnetically connected to the hole in the connecting ball, so that the test portion does not fall out of the hole during the test.
  • a middle portion of the end portion of the finger portion where the tip end portion is located is provided with a groove extending to the outer edge of the finger portion, and a tip portion of the finger portion is provided with a partial spherical groove larger than a half sphere.
  • a connecting ball having a diameter slightly larger than the diameter of the spherical groove is provided, and a hole for fitting with a connecting portion of the test portion is provided on the connecting ball, and a connecting portion of the test portion is inserted in the hole .
  • At the bottom of the trough is a transition from a cylindrical trough having a diameter greater than the width of the trough.
  • the connecting portion of the test portion is interference-fitted, snapped or magnetically connected to the hole in the ball.
  • connection structure since the through groove of the end portion where the tip end portion of the finger portion is elastically deformed, the ball can be pushed in and latched into a partial spherical groove larger than a half sphere. Inside, and can rotate freely, and the ball does not come out from the tip end of the finger shank. For the purpose of cleanliness Therefore, the advantages of the connection structure being the same or similar to the previous connection structure will not be described here.
  • the finger shank is hollow, and a circular crank is rotatably connected at a tip end portion of the finger shank, and the crank rotates around a radial axis of the tip end portion of the finger shank, and a radial edge of the crank is disposed to match the test portion a protruding portion, a connecting portion of the testing portion is sleeved on the protruding portion, a crank is connected to one end of the driving shaft, and the other end of the driving shaft is rotatably connected with the sliding rod, and the driving shaft and a part of the sliding rod are received on the finger rod Inside the section, the slider extends beyond the end of the finger stem.
  • the connecting portion of the test portion is interference-fitted, snap-fitted or magnetically connected to the projection.
  • the driving shaft can be driven by the sliding rod by pulling or pushing the sliding rod, and the crank is driven by the driving shaft, and the test portion on the protruding portion is driven by the crank to rotate.
  • the direction of the test department was changed. Also for the purpose of cleaning, the advantages of the connection structure and the two types of connection structures are not described herein.
  • the free end of the slider can also be threadedly engaged with the free end of the finger stem.
  • the use of a threaded fit to control the sliding of the slider allows for a smoother sliding of the slider, so that the movement of the slider through the drive shaft to drive the crank is easier to control.
  • test finger provided by the utility model solves the problem that in the prior art, in the case of space limitation, the caliper cannot accurately measure the distance from the tip end portion of the finger bar to the charging member or the charging wire, and the utility model has the advantages of convenient use and structure. Single. Using this test finger, it is very easy and accurate to determine whether the distance from the tip end of the finger bar to the live part or the live wire meets safety standards.
  • Figure 1 (a) is an assembled view of a test finger according to a first embodiment of the present invention
  • Figure 1 (b) is an exploded view of the test finger according to the first embodiment of the present invention
  • Figure 1 (c) 2 is a cross-sectional view of a test finger according to a first embodiment of the present invention
  • FIG. 2(a) is an assembled view of a test finger according to a second embodiment of the present invention
  • FIG. 3 (a) is a third embodiment according to the present invention
  • Example of the test refers to the assembled view
  • FIG. 3 (b) is a test pointing without the test portion installed according to the third embodiment of the present invention
  • Figure 1 (c) 2 is a cross-sectional view of a test finger according to a first embodiment of the present invention
  • FIG. 2(a) is an assembled view of a test finger according to
  • Fig. 3 (c) is a view of a test portion and its associated structure according to a third embodiment of the present invention. Description of the reference numerals
  • the test finger 1 provided by the present invention includes a finger-shaped stem portion 2 to which a test portion is connected at the tip end portion 3 of the finger-shaped stem portion 2.
  • the test portion is in two parts, one part is the connecting portion 7, which is connected to the tip end portion 3 of the finger shank, and the other portion is the calibration value portion 6, which is used to measure the tip end portion of the test finger and the uninsulated charging portion. The distance between the component or the live conductor.
  • the finger lever 2 functions in the same manner as the finger-shaped lever of the prior art.
  • the tip end portion 3 of the finger lever 2 abuts against the housing of the electrical device, and the test portion directly faces the finger lever.
  • Department 2 The distance between the tip portion 3 and the uninsulated live parts or live conductors is tested.
  • the length of the test portion can be preset, and the length of the selected test portion is the length of the required minimum safety distance. If the free end of the test portion can be in contact with the charged body (ie, the uninsulated live parts or the live conductor), It indicates that the distance is less than or equal to the minimum safety distance. Conversely, if the free end is not accessible to the charged body, the distance is greater than the minimum safety distance, and when the distance is greater than or equal to the minimum safety distance, the safety setting standard is met.
  • the test portion is a set of test heads having different nominal length values that are replaceable for use on the tip end portion 3 of the finger lever 2. Because the requirements for safety distance are different at different voltage levels, the test heads are made to have different calibration length values, and can be replaced when used, so that the test can be performed under different voltage levels.
  • the tip end portion 3 of the finger rod portion 2 is provided with a partial spherical groove 15, and a magnet 4 is fixedly disposed at the bottom of the partial spherical groove 15, and the connecting ball 5 made of ferromagnetic material is accommodated.
  • the connecting ball 5 is in contact with the magnet 4, and the connecting ball 5 is connected to the partial spherical groove 15 by the magnetism of the magnet 4, and the connecting ball 5 is provided with a hole 16 for the hole In cooperation with the connecting portion 7 of the test portion, the connecting portion 7 of the test portion is inserted in the hole 16.
  • connection portion 7 of the test portion may be further made of a material containing a magnet, such that the connection portion 7 and the connecting ball 5 are The magnetic attraction between the test portions is stably connected to the tip end portion 3.
  • the connecting portion 7 of the test portion may be further interference-fitted or snapped with the hole 16 in the connecting ball 5.
  • test portion Since the test portion is attached to the connecting ball 5, the connecting ball 5 and the partial spherical recess 15 are magnetically connected, and the connecting ball 5 can be freely rotated within the partial spherical recess 15 in the tip end portion 3 of the finger-shaped stem portion 2, thus inserting
  • the test portion in the hole 16 in the connecting ball 5 is also free to swing within a certain angle due to the free rotation of the connecting ball 5.
  • the direction of the test section can be freely varied, increasing the flexibility of use of the test finger. This change in angle is generally adjusted before the test finger is used.
  • the direction of the test portion is usually not adjustable during the use of the test finger.
  • connection between the test portion and the tip end portion 3 of the finger lever portion 2 is a detachable insertion connection, which facilitates replacement of the test portion.
  • a groove 17 is provided in the middle of the tip end portion 3 of the finger-shaped stem portion 2, and the groove 17 extends to the outer edge of the finger-shaped stem portion 3, that is, the groove 17 is a through groove is formed at the bottom of the groove 17 by a cylindrical groove 18 having a diameter larger than a width of the groove 17, and a tip portion 3 of the finger portion 2 is provided with a partial spherical groove 15, the portion
  • the spherical groove 15 is larger than a half-spherical shape for receiving the connecting ball 8 therein, and since it is larger than a half-spherical shape, the connecting ball 8 does not fall off from the partial spherical groove 15.
  • the connecting ball 8 can be pushed in and latched in more than a half sphere.
  • the portion of the spherical recess 15 is free to rotate while the connecting ball 8 does not come out of the tip end portion of the finger portion.
  • the diameter of the connecting ball 8 is slightly larger than the diameter of the spherical recess 15, so that the connecting ball 8 can be more firmly fixed in the spherical recess 15.
  • the connecting ball 8 is also provided with a hole 16 for engaging with the connecting portion 7 of the test portion, and the connecting portion 7 of the test portion is inserted in the hole 16.
  • the connecting portion 7 of the test portion and the connecting ball 8 may be further made of a material containing a magnet and a ferromagnetic material, respectively, so that the connecting portion 7 and the connecting ball 8 may be A magnetic connection is achieved.
  • the connecting portion 7 of the test portion may be further interference-fitted or snap-fitted with the hole 16 on the connecting ball 8.
  • the test finger 1 shown in Fig. 3 (a) is obtained by fitting the test portion shown in Fig. 3 (c) and its associated portion to the finger-shaped stem portion 2 shown in Fig. 3 (b). .
  • the finger lever portion 2 is hollow, and the circular crank 10 is rotatably coupled to the tip end portion 3 of the finger lever portion 2, and a bayonet 13 is disposed in the middle of the circular crank.
  • the bayonet pins 13 Cooperating with the pin holes 14 provided on the tip end portion 3, the bayonet pins 13 are disposed on the front and back sides of the crank 10, and two pin holes 14 are correspondingly provided at the tip end portions, and the cooperation of the bayonet pins 13 and the pin holes 14 makes the crank 10 is rotated about the radial axis of the tip end portion 3 of the finger shank 2, i.e., the crank 10 is rotated about the axis formed by the bayonet 13 on the front and rear sides thereof.
  • a projection 9 is provided which cooperates with the test portion.
  • the connecting portion 7 of the test portion is sleeved on the projection 9, and the crank 10 is connected to one end of the drive shaft 11, and the drive shaft 11 is connected.
  • the other end is rotatably coupled to the slide bar 12, and the movement of the slide bar 12 drives the crank 10 to rotate by the movement of the drive shaft 11, thereby changing the direction of the test portion.
  • a portion of the drive shaft 11 and the slide bar 12 are housed inside the finger lever portion 2, and the slide bar 12 extends beyond the end portion of the finger lever portion 2. This configuration allows the overall volume of the test finger to be reduced, and the user can come into contact with the end of the slider 12 extending beyond the finger portion 12, which facilitates the operation of the slider 12 to effectively control the direction of the test portion.
  • This configuration makes it possible to change the direction of the test head even during use, and the flexibility of the use of the test fingers is further improved compared to the first embodiment and the second embodiment.
  • the connecting portion 7 of the test portion may be further magnetically coupled to the projecting portion 9.
  • the connecting portion 7 of the test portion may be further interference-fitted or engaged with the projecting portion 9.
  • the free end of the slider 12 can also be threadedly engaged with the free end of the finger stem.
  • the use of a threaded fit to control the sliding of the slider 12 allows the slider 12 to slide more smoothly, so that the movement of the slider 10 by the slider 12 is easier to control.
  • test proposed by the present invention is generally used in an electrical device, but can be used in other situations where there is a corresponding need, and the description of the specific embodiments herein is merely illustrative and not limiting. This combination or substitution.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Measuring Leads Or Probes (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

一种测试指(1),包括指状杆部(2),在指状杆部(2)的尖端部(3)连接有用于进行距离测量的测试部,测试部为一组测试头,测试头的长度对应于侵入保护中不同电压等级下的最小安全距离,测试部与指状杆部(3)的尖端部(3)的连接为可拆卸方式的插入连接。该测试指(1),可以准确判断电气设备内部未绝缘的带电部件或者带电导线距离防护部件的距离是否大于等于最小安全距离,解决了现有技术中在空间受限的情况下,无法使用卡钳准确测量指状杆部(2)的尖端部(3)至带电部件或带电导线的距离的问题。

Description

测试指 技术领域
本发明涉及测试指,特别涉及一种用于确定电气设备的侵入保护等级是 否符合安全标准而使用的测试指。 背景技术
在电气设备运行过程中, 为了减少电击或者伤害的危险, 通常需要测量 电气设备内部未绝缘的带电部件或者带电导线距离防护部件, 例如壳体的距 离, 并判断该距离是否大于等于最小安全距离, 以避免人或者其它生物可以 直接接触到未绝缘的带电部件或者带电导线而导致其受到伤害。
现有技术中, 用于测量该距离的方法为, 在需要测量的位置放置一个手 指形状的杆, 接着使用卡钳测量该杆的尖端部至带电部件或带电导线的距 离。在这种测量方法中,有时候卡钳受到空间的限制, 而无法进行有效测量。 在这种情况下, 工程师不得不用眼睛直接估计该距离, 以判断该距离是否大 于等于最小安全距离, 而估计的结果有时会是不准确的。 发明内容
为了弥补现有技术的不足,本实用新型提出一种可以准确判断该距离是 否大于等于最小安全距离的测试指。 该测试指在电气设备中使用, 用于对测 试指的尖端部和未绝缘的带电部件或者带电导线之间的距离是否大于等于 最小安全距离进行准确的判断。
本实用新型所提供的测试指的技术方案为:
一种测试指, 包括指状杆部, 在指状杆部的尖端部连接有用于进行距离 测量的测试部。
该指状杆部的作用与现有技术中的手指形状的杆相同, 在使用中, 用指 状杆部的尖端部抵靠电气设备的壳体, 用测试部直接对指状杆部的尖端部与 未绝缘的带电部件或者带电导线之间的距离进行测试。 测试部的长度是可以 预先设定的, 选定测试部的长度为所需最小安全距离的长度, 如果测试部的 自由端可以接触到带电体(即, 未绝缘的带电部件或者带电导线), 则说明 该距离小于或等于最小安全距离, 反之, 如果自由端不可以接触到带电体, 则说明该距离大于最小安全距离, 当该距离大于等于最小安全距离时, 符合 安全设定标准。
测试部通常为一组测试头,所述测试头的长度对应于侵入保护中不同电 压等级下的最小安全距离。
测试部包括与指状杆部的所述尖端部连接的连接部分和用于测量长度 的标定值部分。
在不同的电压等级情况下, 对于安全距离的要求是不相同的, 测试头制 作为具有不同标定长度值, 则可以满足在不同电压等级情况下的测试。
指状杆部的尖端部设置有部分球形 槽,在部分球形 槽底部固定设置 有磁铁, 在部分球形凹槽中设置有铁磁性材料制成的连接球, 连接球与磁铁 接触, 连接球通过磁铁的磁性连接于部分球形凹槽内, 在连接球上设置有用 于与测试部的连接部分相配合的孔, 测试部的连接部分插入在该孔中。
测试部的连接部分与连接球上的孔过盈配合、 卡接或者磁性连接。 采用这种连接结构,连接球可以在指状杆部的尖端部内的部分球形 槽 内自由转动, 因此插入在连接球上的孔内的测试部也因为连接球的自由转动 而得以在一定角度内自由摆动。 测试部的方向可以自由变化, 增大了该测试 指的使用灵活性。
测试部与指状杆部的尖端部的连接为可拆卸方式的插入连接, 方便了使 用者根据实际实用的电压, 更换不同标定长度的测试部。
测试部的连接部分与连接球上的孔过盈配合、 卡接或者磁性连接, 因此 在测试使用中测试部不会从孔中脱落。
指状杆部的尖端部所在的端部的中间设置有延伸至指状杆部外边缘处 的凹槽, 在指状杆部的尖端部设置有大于二分之一球形的部分球形凹槽, 在 该部分球形凹槽中, 设置有直径略大于该球形凹槽直径的连接球, 在连接球 上设置有用于与测试部的连接部分相配合的孔, 测试部的连接部分插入在该 孔中。
在该 槽的底部由圓柱槽过渡, 该圓柱槽的直径大于该 槽的宽度。 测试部的连接部分与球上的孔过盈配合、 卡接或者磁性连接。
采用这种连接结构, 因为在指状杆部的尖端部所在的端部所开设的通槽 的弹性变形,使得球可以由外推入并卡接在大于二分之一球形的部分球形凹 槽内, 并可以自由转动, 且球不会从指状杆部的尖端部脱出。 为了筒洁的目 的, 因此该种连接结构与上一种连接结构相同或相似的优点在此不再叙述。 指状杆部为中空的, 在指状杆部的尖端部转动连接圓形曲柄, 曲柄绕指 状杆部的尖端部的径向轴转动, 曲柄的径向边缘处设置有与测试部相配合的 凸出部, 测试部的连接部分套接在该凸出部上, 曲柄与驱动轴的一端连接, 驱动轴的另一端与滑杆转动连接, 驱动轴和部分滑杆容置于指状杆部内部, 滑杆延伸超出指状杆部的端部。
测试部的连接部分与凸出部过盈配合、 卡接或者磁性连接。
采用这种构型, 使得在使用该测试指的过程中, 可以通过拉动或者推动 滑杆, 由滑杆带动驱动轴, 由驱动轴驱动曲柄, 由曲柄带动凸出部上的测试 部转动, 而得以改变测试部的方向。 也为了筒洁的目的, 因此该种连接结构 与上两种种连接结构相同的优点在此不再叙述。
在该构型中, 滑杆的自由端还可以与指状杆部的自由端螺纹配合。 采用螺纹配合来控制滑杆的滑动, 可以使滑杆的滑动更加平稳, 因此滑 杆通过驱动轴驱动曲柄的运动更容易控制。
本实用新型所提出的测试指, 解决了现有技术中在空间受限的情况下, 无法使用卡钳准确测量指状杆的尖端部至带电部件或带电导线的距离的问 题, 其使用方便, 结构筒单。 使用该测试指, 可以非常容易且准确地确定指 状杆的尖端部至带电部件或带电导线的距离是否符合安全标准。 附图说明
本实用新型的其它优点和特征将从接下来的仅以非限制性示例的目的 给出的并表示在附图中的本发明的特定实施例的说明变得更加清楚明显,在 附图中:
图 1 ( a )是根据本实用新型的第一实施例的测试指的组装后的视图; 图 1 ( b )是根据本实用新型的第一实施例的测试指的分解视图; 图 1 ( c )是根据本实用新型的第一实施例的测试指的截面视图; 图 2 ( a )是根据本实用新型的第二实施例的测试指的组装后的视图; 图 2 ( b )是根据本实用新型的第二实施例的测试指的分解视图; 图 2 ( c )是根据本实用新型的第二实施例的测试指的截面视图; 图 3 ( a )是根据本实用新型的第三实施例的测试指的组装后的视图; 图 3 ( b )是根据本实用新型的第三实施例的没有安装测试部的测试指视 图;
图 3( c )是根据本实用新型的第三实施例的测试部及其关联结构的视图。 附图标记说明
1 测试指
2指状杆部
3 尖端部
4磁铁
5 连接球
6 标定值部分
7 连接部分
8 连接球
9 凸出部
10 曲柄
11 驱动轴
12 滑杆
13 卡销
14销孔
15 部分球形凹槽
16 孔
17 凹槽 具体实施方式
现在结合图 1 ( a )至图 3 ( c ), 对本实用新型的测试指的实施例进行说 明。 为了清楚筒洁的目的, 在不同实施例中相同和相似的部件使用相同的附 图标记。
本实用新型提供的测试指 1 , 包括指状杆部 2,在指状杆部 2的尖端部 3 连接有测试部。 测试部分为两部分, 一部分为连接部分 7, 其与指状杆部的 尖端部 3连接, 另一部分为标定值部分 6, 该标定值部分 6用于测量测试指 的尖端部和未绝缘的带电部件或者带电导线之间的距离。
该指状杆部 2的作用与现有技术中的手指形状的杆相同, 在使用中, 用 指状杆部 2的尖端部 3抵靠电气设备的壳体, 用测试部直接对指状杆部 2的 尖端部 3与未绝缘的带电部件或者带电导线之间的距离进行测试。 测试部的 长度是可以预先设定的, 选定测试部的长度为所需最小安全距离的长度, 如 果测试部的自由端可以接触到带电体(即, 未绝缘的带电部件或者带电导 线), 则说明该距离小于或等于最小安全距离, 反之, 如果自由端不可以接 触到带电体, 则说明该距离大于最小安全距离, 当该距离大于等于最小安全 距离时, 符合安全设定标准。
通常, 测试部为一组具有不同标定长度值的测试头, 该测试头在指状杆 部 2的尖端部 3上可以更换使用。 因为, 在不同的电压等级情况下, 对于安 全距离的要求是不相同的, 测试头制作为具有不同标定长度值, 且在使用时 可以更换, 则可以满足在不同电压等级情况下的测试。
实施例一
如图 1 ( b )所示, 指状杆部 2的尖端部 3设置有部分球形凹槽 15 , 在 部分球形凹槽 15底部固定设置有磁铁 4,铁磁性材料制成的连接球 5容置于 部分球形凹槽 15中, 连接球 5与磁铁 4接触, 通过磁铁 4的磁性, 连接球 5 得以连接于部分球形凹槽 15内,在连接球 5上设置有孔 16,该孔 16用于与 测试部的连接部分 7相配合, 测试部的连接部分 7插入在该孔 16中。
为了使测试部能够稳定连接在指状杆部 2的尖端部 3上不脱落,还可以 进一步使测试部的连接部分 7为包含磁铁的材料制成, 这样, 因为连接部分 7与连接球 5之间的磁性吸力, 测试部得以稳定连接于尖端部 3上。
为了达到稳定连接测试部的目的, 也可以进一步使测试部的连接部分 7 与连接球 5上的孔 16过盈配合或者卡接。
因为测试部连接在连接球 5上, 连接球 5和部分球形凹槽 15通过磁性 连接, 连接球 5可以在指状杆部 2的尖端部 3内的部分球形凹槽 15内自由 转动, 因此插入在连接球 5上的孔 16内的测试部也因为连接球 5的自由转 动而得以在一定角度内自由摆动。 测试部的方向可以自由变化, 增大了该测 试指的使用灵活性。 该角度变化一般在测试指使用之前进行调整, 在测试指 使用过程中, 测试部的方向通常不可以进行调节。
测试部与指状杆部 2的尖端部 3的连接为可拆卸方式的插入连接,方便 了测试部的更换。
实施例二
为了筒洁的目的,与实施例一的连接结构相同或相似的优点在此不再叙 述。
如图 2 ( b )所示, 在指状杆部 2的尖端部 3的中间设置有凹槽 17, 该 凹槽 17延伸至指状杆部 3的外边缘处, 即, 该凹槽 17是一个通槽, 在该凹 槽 17的底部由圓柱槽 18过渡, 该圓柱槽 18的直径大于该 槽 17的宽度, 在指状杆部 2的尖端部 3设置有部分球形凹槽 15 , 该部分球形凹槽 15大于 二分之一球形, 用于将连接球 8容置于其中, 且因为其大于二分之一球形, 所以连接球 8不会从部分球形凹槽 15中脱落。
在该实施例中, 因为在指状杆部 2的尖端部 3所在的端部所开设的通槽 的弹性变形,使得连接球 8可以由外推入并卡接在大于二分之一球形的部分 球形凹槽 15内, 并可以自由转动, 同时连接球 8不会从指状杆部的尖端部 脱出。
连接球 8的直径略大于该球形凹槽 15的直径, 这样, 连接球 8能更稳 固地固定在球形凹槽 15中。
与实施例一中的作用相同,在连接球 8上也设置有用于与测试部的连接 部分 7相配合的孔 16, 测试部的连接部分 7插入在该孔 16中。
为了使测试部稳固连接至尖端部 3 , 还可以进一步使测试部的连接部分 7和连接球 8分别由包含磁铁的材料和铁磁性材料制成, 因此, 连接部分 7 与连接球 8之间可以实现磁性连接。
为了使测试部稳固连接至尖端部 3 , 也可以进一步使测试部的连接部分 7与连接球球 8上的孔 16过盈配合或者卡接。
实施例三
为了筒洁的目的,与实施例一和实施例二的连接结构相同或相似的优点 在此不再叙述。
图 3 ( a ) 中所示的测试指 1是图 3 ( c ) 中所示的测试部及其关联部分 套接于图 3 ( b ) 中所示的指状杆部 2中后所得到的。
如图 3 ( b )所示, 指状杆部 2为中空的, 圓形曲柄 10转动连接在指状 杆部 2的尖端部 3 , 在圓形曲柄中间设置有卡销 13 , 该卡销 13与设置在尖 端部 3上的销孔 14配合, 卡销 13设置在曲柄 10的正反两侧, 在尖端部也 对应设置有两个销孔 14, 卡销 13与销孔 14的配合使得曲柄 10绕指状杆部 2的尖端部 3的径向轴转动, 即曲柄 10围绕其正反两侧的卡销 13所形成的 轴转动。 在曲柄 10的径向边缘处设置有与测试部相配合的凸出部 9,测试部的连 接部分 7套接在该凸出部 9上, 曲柄 10与驱动轴 11的一端连接,驱动轴 11 的另一端与滑杆 12转动连接, 滑杆 12的运动通过驱动轴 11的运动驱动曲 柄 10转动, 因此得以改变测试部的方向。
驱动轴 11和滑杆 12的一部分容置于指状杆部 2内部, 滑杆 12延伸超 出指状杆部 2的端部。 这种结构使得测试指的整体体积减小, 且使用者可以 接触到滑杆 12延伸超出指状杆部 12的端部, 易于操作该滑杆 12对测试部 的方向进行有效地控制。
该种构型使得即使在使用过程中, 操作滑杆 12也可以改变测试头的方 向, 相比于实施方式一和实施方式二, 进一步提高了测试指使用的灵活性。
为了使测试部稳固与尖端部 3连接,还可以进一步使测试部的连接部分 7与凸出部 9磁性连接。
也为了使测试部稳固连与尖端部 3连接,也可以进一步使测试部的连接 部分 7与凸出部 9过盈配合或者卡接。
在该实施例中,滑杆 12的自由端还可以与指状杆部的自由端螺纹配合。 采用螺纹配合来控制滑杆 12的滑动, 可以使滑杆 12的滑动更加平稳, 因此 滑杆 12带动曲柄 10的运动更容易控制。
本实用新型所提出的测试指, 虽然一般用于电气设备中, 但是也可以用 于其它有相应需求的情况中,在此的具体实施例的说明仅为示例性的而非限 制性的说明。 此结合或者替代。
以上对本实用新型进行了详细介绍, 对于本领域的一般技术人员, 依据 本实用新型实施例的思想,在具体实施方式及应用范围上的改变不应认为偏 离了本实用新型保护的范围, 综上所述, 本说明书内容不应理解为对本实用 新型的限制。

Claims

权利要求书
1、 一种测试指, 包括指状杆部(2), 其特征在于: 在所述指状杆部(2) 的尖端部 (3)连接有用于进行距离测量的测试部。
2、 根据权利要求 1所述的测试指, 其特征在于: 所述测试部为一组测 试头, 所述测试头的长度对应于侵入保护中不同电压等级下的最小安全距 离。
3、 根据权利要求 1所述的测试指, 其特征在于: 所述测试部包括与所 述指状杆部 (2) 的所述尖端部 (3)连接的连接部分(7)和用于测量长度 的标定值部分(6)。
4、 根据权利要求 3所述的测试指, 其特征在于: 所述指状杆部(2)的 所述尖端部( 3 )设置有部分球形凹槽( 15 ), 在所述部分球形凹槽( 15 )底 部固定设置有磁铁(4), 在所述部分球形凹槽(15) 中设置有铁磁性材料制 成的连接球( 5 ), 所述连接球( 5 )与所述磁铁 ( 4 )接触, 所述连接球( 5 ) 通过所述磁铁(4) 的磁性连接于所述部分球形凹槽(15) 内, 在所述连接 球( 5 )上设置有用于与所述测试部的所述连接部分( 7 )相配合的孔( 16 ), 所述测试部的所述连接部分(7)插入在所述孔(16) 中。
5、 根据权利要求 3所述的测试指, 其特征在于: 所述指状杆部(2)的 所述尖端部(3)所在的端部的中间设置有延伸至所述指状杆部(2)外边缘 处的凹槽(17), 在所述指状杆部 (2) 的所述尖端部 (3)设置有大于二分 之一球形的部分球形凹槽(15), 在所述部分球形凹槽(15) 中, 设置有直 径略大于该球形凹槽直径的连接球(8), 在所述连接球(8)上设置有用于 与所述测试部的所述连接部分(7)相配合的孔(16), 所述测试部的所述连 接部分( 7 )插入在所述孔( 16 ) 中。
6、 根据权利要求 5所述的测试指, 其特征在于: 在所述凹槽(15) 的 底部由圓柱槽(18)过渡, 所述圓柱槽(18) 的直径大于所述凹槽(15) 的 宽度。
7、 根据权利要求 4至 6中任意一项所述的测试指, 其特征在于: 所述 测试部的所述连接部分( 7 )与所述连接球( 8 )上的所述孔( 16 )过盈配合、 卡接或者磁性连接。
8、 根据权利要求 3所述的测试指, 其特征在于: 所述指状杆部(2)为 中空的, 在所述指状^ 部(2) 的所述尖端部(3)转动连接圓形曲柄(10), 所述曲柄(10)绕所述指状^ ^干部(2)的所述尖端部(3) 的径向轴转动, 所 述曲柄(10)的径向边缘处设置有与所述测试部相配合的凸出部(9), 所述 测试部的所述连接部分(7)套接在所述凸出部(9)上, 所述曲柄(10)与 驱动轴( 11 ) 的一端连接, 所述驱动轴( 11 ) 的另一端与滑杆( 12)转动连 接, 所述驱动轴 (11 )和部分所述滑杆(12)容置于所述指状杆部 (2) 内 部, 所述滑杆(12)延伸超出所述指状杆部 (2) 的端部。
9、 根据权利要求 8所述的测试指, 其特征在于: 所述测试部的所述连 接部分(7) 与所述凸出部 (9)过盈配合、 卡接或者磁性连接。
10、 根据权利要求 8或 9所述的测试指, 其特征在于: 所述滑杆(12) 的自由端与所述指状杆部 ( 2 ) 的自由端螺纹配合。
PCT/CN2013/073035 2012-03-23 2013-03-22 测试指 WO2013139296A1 (zh)

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