CN104235296B - 探头传动装置 - Google Patents

探头传动装置 Download PDF

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CN104235296B
CN104235296B CN201310244805.6A CN201310244805A CN104235296B CN 104235296 B CN104235296 B CN 104235296B CN 201310244805 A CN201310244805 A CN 201310244805A CN 104235296 B CN104235296 B CN 104235296B
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rope
hole
drive device
driving shaft
axis hole
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CN104235296A (zh
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唐明
陈振宇
白乐云
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Shenzhen Mindray Scientific Co Ltd
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Shenzhen Mindray Bio Medical Electronics Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H19/00Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/08Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • A61B8/4461Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe
    • A61B8/4466Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe involving deflection of the probe
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16GBELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/06Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with laterally-arranged screws
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88Sonar systems specially adapted for specific applications
    • G01S15/89Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8934Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a dynamic transducer configuration
    • G01S15/8938Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a dynamic transducer configuration using transducers mounted for mechanical movement in two dimensions
    • G01S15/894Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a dynamic transducer configuration using transducers mounted for mechanical movement in two dimensions by rotation about a single axis
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52079Constructional features
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H19/00Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/08Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
    • F16H2019/085Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion by using flexible members
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88Sonar systems specially adapted for specific applications
    • G01S15/89Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8993Three dimensional imaging systems

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Abstract

一种探头传动装置,所述探头传动装置包括:主动轴,开设有轴孔和径孔,所述径孔与所述轴孔相通;绳索,经由所述径孔伸入所述轴孔;固定件,设于所述轴孔内将所述绳索固定于所述轴孔内。上述的探头传动装置,在主动轴上开设有轴孔和径孔,绳索伸入径孔,通过设于轴孔的固定件固定。该探头传动装置固定绳索的结构简单,主动轴表面可以省去固定绳索的元件,表面光滑,避免了绳索与元件产生干涉。

Description

探头传动装置
技术领域
本发明涉及医疗仪器领域,特别是涉及探头传动装置。
背景技术
具有3维成像功能的超声波探头叫做3D机械探头,其内部一般有作为发射和接收信号的换能器单元。步进电机作为驱动动力源,在信号控制下驱动换能器单元在一定角度内摆动。在每一个摆动角度,换能器单元都可以发射超声波并接收带有人体组织信息的回波,因而可以在摆动范围之内的每个角度对人体组织进行成像,从而构建人体组织的3维图像。
3D机械探头又分为体表3D机械探头和腔内3D机械探头。腔内3D机械探头常见的驱动方式包括锥齿轮,绳索等方式。绳索驱动装置设置有被动轴、滑轮、探头传动装置,其中,探头传动装置包括主动轴和绳索,绳索经由滑轮与被动轴连接。探头阵元设置于被动轴,通过主动轴转动,然后由绳索带动被动轴转动。
一般的探头传动装置,需要先在主动轴上加工一个平面,用螺钉固定压块的方式将绳索两端压住,由于压块具有一定的体积,轴旋转过程中,压块可能会与绳索干涉,增加了出错的概率。
发明内容
基于此,有必要针对探头传动装置存在压块与绳索干涉的问题,提供一种避免发生绳索与压块发生干涉的探头传动装置。
一种探头传动装置,所述探头传动装置包括:
主动轴,开设有轴孔和径孔,所述径孔与所述轴孔相通;
绳索,经由所述径孔伸入所述轴孔;
固定件,设于所述轴孔内将所述绳索固定于所述轴孔内。
在其中一个实施例中,所述固定件是卡绳杆,所述卡绳杆嵌套于所述轴孔。
在其中一个实施例中,所述卡绳杆包括螺钉和固定销,所述固定销与所述螺钉活动连接,所述绳索通过所述固定销固定于所述轴孔内壁。
在其中一个实施例中,所述螺钉为空心螺钉,所述固定销包括连接部和卡合部,所述固定销通过所述连接部嵌入所述螺钉,通过所述卡合部将所述绳索固定于所述轴孔内壁。
在其中一个实施例中,所述固定销的卡合部的前端为端头逐渐减小的形状。
在其中一个实施例中,所述卡绳杆将所述绳索抵压于所述轴孔内壁,所述卡绳杆抵压所述绳索处的直径大于所述轴孔与两倍所述绳索直径之差。
在其中一个实施例中,所述径孔的数量为两个,分别分布于所述主动轴的不同径面。
在其中一个实施例中,所述径孔位于过所述主动轴中轴线的同一平面上。
在其中一个实施例中,所述径孔与所述主动轴的中轴线垂直和/或所述轴孔开设于所述主动轴轴心。
在其中一个实施例中,所述轴孔和/或所述径孔为沉头孔。
上述的探头传动装置,在主动轴上开设有轴孔和径孔,绳索伸入径孔,通过设于轴孔的固定件固定。该探头传动装置固定绳索的结构简单,主动轴表面可以省去固定绳索的元件,表面光滑,避免了绳索与元件产生干涉。
附图说明
图1a、图1b为传统的3D机械探头绳索的探头传动装置的结构示意图;
图2为一实施方式的探头传动装置的结构剖面示意图;
图3为一实施方式的探头传动装置的主动轴的结构剖面示意图;
图4为一实施方式的探头传动装置的结构剖面示意图;
图5为一实施方式的探头传动装置的结构示意图;
图6为一实施方式的固定销的结构示意图;
图7为一实施方式的绳索缠绕主动轴的结构示意图。
具体实施方式
传统的探头传动装置,如图1a、图1b所示,需要先在主动轴上加工一个平面,用螺钉加压块的方式将绳索两端压住,由于压块具有一定的体积,主动轴在旋转过程中,绳索可能会和压块产生干涉,增加了出错的概率和装配的难度。
一实施方式的探头传动装置,如图2、图3所示,探头传动装置包括主动轴100、卡绳杆300和绳索200。主动轴100开设有轴孔120和径孔140,径孔140与轴孔120相通。绳索200经由径孔140伸入轴孔120,卡绳杆300嵌套于轴孔120将绳索200固定于轴孔120内。容易理解,卡绳杆300还可以由其他设于轴孔内的固定件替代,例如使用符合强度要求的蜡、胶等,在液态时注入轴孔120,固化后将绳索200固定于轴孔120内。
本实施例中,轴孔120与主动轴100的中轴线平行。在其他实施例中,轴孔120可以斜设于主动轴100中,不一定要与主动轴100的中轴线平行,可以理解的是,当轴孔120与中轴线平行时,嵌套于轴孔120内的卡绳杆300受力均匀,能增加卡绳杆300的使用寿命,而且卡绳杆300为水平设置,不容易从轴孔120中脱落。
具体的,当轴孔120开设于主动轴100轴心时,主动轴100重心分布均匀,避免因重力分布不均给驱动电机带来的损害,增加了驱动电机的使用寿命和使用效率。
卡绳杆300将绳索200抵压于轴孔120内壁,卡绳杆300抵压绳索200处的直径大于轴孔120与两倍绳索200直径之差,从而可以压紧绳索200。在其他的实施例中,也可以将绳索200抵压在轴孔120的孔底。
本实施例中,径孔140与主动轴100的中轴线垂直。在其他实施例中,径孔140可以斜设于主动轴100与轴孔120相通,不一定要与主动轴100的中轴线垂直,可以理解的是,当径孔140与中轴线垂直时,绳索200的受力方向与径孔140孔径方向一致,绳索200与径孔140孔壁摩擦小,且受力均匀,能够增加绳索200的使用寿命。
上述的探头传动装置,在主动轴100上开设有轴孔120和径孔140,绳索200伸入径孔140,通过套设于轴孔120的卡绳杆300固定。该绳索200固定装置结构简单,主动轴100表面可以省去固定绳索200的元件,表面光滑,避免了绳索200与表面元件产生干涉。
具体的,如图4所示,卡绳杆300包括螺钉320和固定销340,固定销340与螺钉320活动连接,绳索200通过固定销340固定于轴孔120内壁。安装时,将绳索200伸入径孔140内,将固定销340从轴孔120内放入,装入螺钉320固定。固定销340的长度应能够卡住与距离轴孔120孔口最远的绳索200,固定销340的直径加上绳索200的两倍直径大于轴孔120的直径,保证将绳索200压紧固定于轴孔120内壁。固定销340与螺钉320活动连接,可根据距离轴孔120孔口最远的径孔140的位置更换不同长度的固定销340,以及根据轴孔120孔径和绳索200直径的大小更换不同直径的固定销340。
此外,轴孔120开设有与螺钉320匹配的螺纹,采用螺钉320与螺纹配合,螺钉320与轴孔120的结合更为稳固,可防止使用中螺钉320和轴孔120发生相对位移,造成绳索200的松动;而且在螺纹的作用下,通过拧动螺钉320旋转,可精确的控制螺钉320的移动距离,以达到精确的控制绳索200的松紧的目的。
更为具体的,如图5所示,螺钉320为空心螺钉,固定销340包括连接部342和卡合部344,固定销340通过连接部342嵌入螺钉320,通过卡合部344将绳索200固定于轴孔120内壁。固定销340通过连接部342嵌入螺钉320中,取出或更换固定销340时,取出螺钉320后,可将固定销340从螺钉320上拔出,十分方便。
具体到本实施例中,如图6所示,固定销340的卡合部344的前端为端头逐渐减小的形状,可通过调节固定销340的伸入位置调节固定销340的卡合部344与轴孔120的侧壁之间的间隙,以控制绳索200的松紧,卡合部344的长度及斜角尺寸可根据绳索200的直径、两根绳索的距离以及轴孔120的大小来计算,以保证两根绳索具有足够的压缩量。
在其中一个实施例中,径孔140分布于主动轴100的不同径面,即在主动轴100的轴向上有一定距离。主动轴100转动进行传动时,绳索200缠绕于主动轴100上,绳索200间不会产生干涉。
上述实施例中,径孔140有两个,在其他实施例中,径孔140的个数也可以为一个,当只有一个径孔140时,绳索200的端头和端尾固定伸入径孔140中,通过卡绳杆300固定于主动轴100。主动轴100表面可以省去固定绳索200的元件,绳索200与主动轴100之间不会产生干涉。
本实施例中,如图4和图7所示,径孔140位于过主动轴100中轴线的同一平面上,径孔140分布于主动轴100的不同径面。在使用一根绳索200进行传动时,将绳索200的端头和端尾分别伸入一径孔140中固定;在使用两根绳索200进行传动时,将绳索200与主动轴100相连的一端伸入一径孔140中固定。此时,径孔140之间在立体空间呈180度,主动轴100受力较均衡,转动时也较平稳。在转动过程中,可保证主动轴100在±180度的旋转角度内,保持线性传递。在其他实施例中,径孔140之间在立体空间也可以呈90、度、70度等。
在其中一个实施例中,轴孔120和径孔140为沉头孔,轴孔120位为沉头孔可使螺钉320的钉头嵌套在沉头孔中,使得主动轴100的端头平整,径孔140为沉头孔可使径孔140外扩,便于绳索200伸入径孔140中。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (9)

1.一种探头传动装置,其特征在于,所述探头传动装置包括:
主动轴,开设有轴孔和径孔,所述径孔与所述轴孔相通;
绳索,经由所述径孔伸入所述轴孔;
固定件,设于所述轴孔内将所述绳索固定于所述轴孔内;
其中,所述固定件是卡绳杆,所述卡绳杆将所述绳索抵压于所述轴孔内壁,所述卡绳杆抵压所述绳索处的直径大于所述轴孔与两倍所述绳索直径之差。
2.根据权利要求1所述的探头传动装置,其特征在于,所述卡绳杆嵌套于所述轴孔。
3.根据权利要求2所述的探头传动装置,其特征在于,所述卡绳杆包括螺钉和固定销,所述固定销与所述螺钉活动连接,所述绳索通过所述固定销固定于所述轴孔内壁。
4.根据权利要求3所述的探头传动装置,其特征在于,所述螺钉为空心螺钉,所述固定销包括连接部和卡合部,所述固定销通过所述连接部嵌入所述螺钉,通过所述卡合部将所述绳索固定于所述轴孔内壁。
5.根据权利要求4所述的探头传动装置,其特征在于,所述固定销的卡合部的前端为端头逐渐减小的形状。
6.根据权利要求1所述的探头传动装置,其特征在于,所述径孔的数量为两个,分别分布于所述主动轴的不同径面。
7.根据权利要求6所述的探头传动装置,其特征在于,所述径孔位于过所述主动轴中轴线的同一平面上。
8.根据权利要求1所述的探头传动装置,其特征在于,所述径孔与所述主动轴的中轴线垂直和/或所述轴孔开设于所述主动轴轴心。
9.根据权利要求1所述的探头传动装置,其特征在于,所述轴孔和/或所述径孔为沉头孔。
CN201310244805.6A 2013-06-19 2013-06-19 探头传动装置 Active CN104235296B (zh)

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