WO2014201889A1 - 探头传动装置 - Google Patents

探头传动装置 Download PDF

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Publication number
WO2014201889A1
WO2014201889A1 PCT/CN2014/074222 CN2014074222W WO2014201889A1 WO 2014201889 A1 WO2014201889 A1 WO 2014201889A1 CN 2014074222 W CN2014074222 W CN 2014074222W WO 2014201889 A1 WO2014201889 A1 WO 2014201889A1
Authority
WO
WIPO (PCT)
Prior art keywords
radial
probe transmission
rope
hole
drive shaft
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2014/074222
Other languages
English (en)
French (fr)
Inventor
唐明
陈振宇
白乐云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Mindray Bio Medical Electronics Co Ltd
Original Assignee
Shenzhen Mindray Bio Medical Electronics Co Ltd
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 Shenzhen Mindray Bio Medical Electronics Co Ltd filed Critical Shenzhen Mindray Bio Medical Electronics Co Ltd
Publication of WO2014201889A1 publication Critical patent/WO2014201889A1/zh
Priority to US14/975,542 priority Critical patent/US10806430B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • A61B8/4461—Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe
    • A61B8/4466—Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe involving deflection of the probe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/08—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/06—Means 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8934—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a dynamic transducer configuration
    • G01S15/8938—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a dynamic transducer configuration using transducers mounted for mechanical movement in two dimensions
    • G01S15/894—Short-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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52079—Constructional features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/08—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
    • F16H2019/085—Gearings 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8993—Three dimensional imaging systems

Definitions

  • the present invention relates to the field of medical instruments, and more particularly to a probe transmission.
  • An ultrasonic probe with 3-dimensional imaging capabilities is called a 3D mechanical probe and includes a transducer unit that acts as a transmitting and receiving signal.
  • the stepping motor is used as a driving power source to drive the transducer unit to swing within a certain angle under signal control; the transducer unit can emit ultrasonic waves at each angle within the swing range and receive echoes with body tissue information. Human tissue can thus be imaged at each angle within this range to construct a 3-dimensional image of human tissue.
  • 3D mechanical probes are further divided into body surface 3D mechanical probes and intracavity 3D mechanical probes.
  • Common driving methods for 3D mechanical probes in the cavity include bevel gears, ropes, and the like.
  • the rope drive includes a passive shaft, a pulley, and a probe transmission.
  • the probe transmission includes a drive shaft and a rope.
  • the rope is connected to the passive shaft via a pulley.
  • the probe element is disposed at one end of the passive shaft, rotated by the drive shaft, and then driven by the rope to rotate the passive shaft.
  • a plane is arranged on the drive shaft, and the two ends of the rope are pressed by fixing the pressure block by screws. Since the pressure block has a certain volume, the pressure block may interfere with the rope during the rotation of the shaft. , increasing the probability of error.
  • a probe transmission device comprising:
  • a driving shaft which is provided with a radial hole and a radial hole, and the radial hole is in communication with the radial hole;
  • a fixing member disposed in the radial hole fixes the rope in the radial hole.
  • a radial hole and a radial hole are formed in the driving shaft, and the rope extends into the radial hole through the radial hole, and the rope is fixed by the fixing member provided in the radial hole.
  • the probe transmission has a simple structure, and the surface of the driving shaft does not need to be provided with a part for fixing the rope, and the surface of the driving shaft is smooth, thereby avoiding interference between the rope and the surface of the driving shaft surface.
  • FIG. 1 is a schematic cross-sectional view showing the structure of a probe transmission device according to an embodiment
  • FIG. 2 is a schematic cross-sectional view showing the structure of a driving shaft of a probe transmission device according to an embodiment
  • FIG. 3 is a schematic cross-sectional view showing the structure of a probe transmission device according to an embodiment
  • FIG. 4 is a schematic perspective structural view of a probe transmission device according to an embodiment
  • FIG. 5 is a schematic structural view of a fixing pin according to an embodiment.
  • Fig. 6 is a schematic view showing the structure of a rope winding drive shaft according to an embodiment.
  • the probe transmission includes a drive shaft 100, a fixed rod 300, and a rope 200.
  • the drive shaft 100 is provided with a radial hole 120 and a radial hole 140.
  • the radial bore 140 is in communication with the radial bore 120.
  • the cord 200 extends into the radial bore 120 via the radial bore 140 and is received within the radial bore 120.
  • the fixing rod 300 is received in the radial bore 120 and the cord 200 is fixed in the radial bore 120.
  • the fixing rod 300 can also be replaced by other fixing members disposed in the radial hole 120, for example, using wax, glue, etc. according to the strength requirement, and injecting the radial hole 120 in the liquid state, and fixing the rope 200 to the diameter after curing.
  • the hole 120 can also be replaced by other fixing members disposed in the radial hole 120, for example, using wax, glue, etc. according to the strength requirement, and injecting the radial hole 120 in the liquid state, and fixing the rope 200 to the diameter
  • the central axis of the radial bore 120 is parallel to the central axis of the drive shaft 100. Since the central axis of the radial hole 120 is parallel to the central axis of the driving shaft 100, the force of the fixing rod 300 accommodated in the radial hole 120 is uniform, and the service life of the fixing rod 300 can be increased. Further, the central axis of the radial hole 120 is parallel to the central axis of the driving shaft 100, and the fixing rod 300 is disposed along the extending direction of the radial hole 120 in a horizontal state, and is not easily detached from the radial hole 120. It can be understood that in other embodiments, the central axis of the radial bore 120 can also be disposed non-parallel to the central axis of the drive shaft 100.
  • the radial hole 120 is opened at the axial center of the driving shaft 100 , so that the center of gravity of the driving shaft 100 is evenly distributed, thereby avoiding damage caused by uneven distribution of gravity to the driving motor, thereby prolonging the use of the driving motor. Longevity and increased efficiency.
  • the radial bore 140 is formed on the drive shaft 100 and communicates with the radial bore 120.
  • the central axis of the radial hole 140 is perpendicular to the central axis of the driving shaft 100, so that the direction of the force of the rope 200 coincides with the direction of the diameter of the radial hole 140, and the wall of the rope 200 and the radial hole 140 The friction between the two is small and the force is uniform, which can increase the service life of the rope 200.
  • the radial bore 140 can be obliquely disposed on the drive shaft 100, that is, the central axis of the radial bore 140 does not need to be disposed perpendicular to the central axis of the drive shaft 100.
  • the number of radial holes 140 is two, and the two radial holes 140 are distributed on different diameter faces of the drive shaft 100, that is, between the two radial holes 140. There is a certain distance in the axial direction of the drive shaft 100.
  • the number of radial holes 140 may also be one.
  • both ends of the rope 200 respectively protrude into the radial hole 140 and are fixed in the drive shaft 100 by the fixing rod 300.
  • the surface of the drive shaft 100 does not need to be provided with a part for fixing the rope 200, and there is no interference between the rope 200 and the drive shaft 100.
  • the central axes of the two radial holes 140 are in the same plane as the central axis of the drive shaft 100. And two radial holes 140 are distributed on different diameter faces of the drive shaft 100.
  • the diameter of the drive shaft 100 is a section along the radial direction of the drive shaft 100.
  • the two ropes 200 can be wound around the driving shaft 100 along the respective diameter surfaces without interfering with any other parts of the surface of the driving shaft 100, and the rotating shaft has a large rotation angle to avoid errors.
  • the central axes of the two radial holes 140 are in the same plane, and the two central axes form an angle of 180 degrees.
  • the drive shaft 100 is guaranteed to maintain linear transmission over a rotation angle of ⁇ 180 degrees.
  • the drive shaft 100 is more balanced and more stable when rotated.
  • the central axes of the two radial bores 140 may also form an angle of 90 degrees, 70 degrees, and the like.
  • the radial hole 120 and the radial hole 140 are counterbore holes, and the radial hole 120 is a countersunk hole, so that the nail head of the screw 320 is nested in the counterbore, so that The end of the drive shaft 100 is flat, and the radial bore 140 is a counterbore for expanding the radial bore 140 to facilitate the insertion of the cord 200 into the radial bore 140.
  • the fixing rod 300 is housed in the radial hole 120, and one end of the fixing rod 300 presses the rope 200 and closely bonds the rope 200 to the inner wall of the radial hole 120.
  • the number of radial holes 140 is two. Two ends of the rope 200 respectively pass through a corresponding one of the radial holes 140 and protrude into the radial hole 120.
  • the diameter of the fixing rod 300 against the two ropes 200 is slightly larger than the diameter of the radial hole 120 and the double rope 200. Poor, so that the rope 200 can be pressed.
  • the cord 200 can also be pressed against the bottom of the bore of the radial bore 120.
  • the fixing rod 300 includes a screw 320 and a fixing pin 340.
  • the fixing pin 340 is movably coupled to the screw 320.
  • the cord 200 is fixed to the inner wall of the radial bore 120 by a fixing pin 340.
  • both ends of the rope 200 pass through a radial hole 140 and extend into the radial hole 120, and the fixing pin 340 is placed in the radial hole 120, and the screw 320 is fitted to fix the rope 200.
  • the length of the securing pin 340 is configured to catch the cord 200 furthest from the open end of the radial bore 120.
  • the sum of the diameter of the fixing pin 340 and the double diameter of the rope 200 is larger than the diameter of the radial hole 120, and it can be ensured that the rope 200 can be press-fitted to the inner wall of the radial hole 120.
  • the fixing pin 340 is movably connected to the screw 320, and the fixing pins 340 of different lengths can be replaced according to the length of the radial hole 120, and the fixing pins 340 of different diameters are replaced according to the diameter of the radial hole 120 and the diameter of the rope 200.
  • the inner wall of the radial hole 120 of the drive shaft 100 is provided with a thread matching the screw 320.
  • the screw 320 is threadedly engaged with the inner wall of the radial bore 120 such that the connection of the screw 320 to the drive shaft 100 is more stable, preventing relative displacement of the screw 320 and the radial bore 120 during use, resulting in loosening of the cord 200. Further, by rotating the screw 320, the moving distance of the screw 320 can be precisely controlled to achieve precise control of the tightness of the cord 200.
  • the screw 320 is a hollow screw.
  • the fixing pin 340 includes a connecting portion 342 and an engaging portion 344.
  • the connecting portion 342 of the fixing pin 340 is received in the hollow screw 320, and the engaging portion 344 of the fixing pin 340 protrudes into the radial hole 120 to fix the rope 200 to the inner wall of the radial hole 120.
  • the attachment portion 342 of the fixing pin 340 is convenient for loading or unloading at the time of attachment or detachment. After the screw 320 is taken out, the fixing pin 340 can be pulled out from the screw 320, which is very convenient.
  • the diameter of one end of the engaging portion 344 of the fixing pin 340 away from the connecting portion 342 gradually decreases.
  • the gap between the engaging portion 344 of the fixing pin 340 and the side wall of the radial hole 120 can be adjusted by adjusting the extending position of the fixing pin 340, so that the elastic state of the rope 200 can be controlled.
  • the change in the length and diameter of the engaging portion 344 can be calculated based on the diameter of the rope 200, the distance of the ropes at both ends, and the size of the radial hole 120 to ensure that the two-stage rope 200 has a sufficient amount of compression.
  • the drive shaft 100 of the probe transmission device is provided with a radial hole 120 and a radial hole 140.
  • the rope 200 extends into the radial hole 140 and is fixed by a fixing rod 300 received in the radial hole 120.
  • the probe transmission has a simple structure, and the surface of the drive shaft 100 does not need to be provided with a component for fixing the rope 200.
  • the surface of the drive shaft 100 is smooth, and the rope 200 is prevented from interfering with the components on the surface of the drive shaft 100.

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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（100），开设有径向孔（140）和轴向孔（120），所述径向孔（140）和所述轴向孔（120）相通；绳索（200），经由所述径向孔（140）伸入所述轴向孔（120）；固定件，设于所述轴向孔（120）内将所述绳索（200）固定于所述径向孔（140）内。上述的探头传动装置，在主动轴（100）上开设有径向孔（140）和轴向孔（120），绳索（200）伸入径向孔（140），通过设于轴向孔（120）的固定件固定。该探头传动装置的结构简单，主动轴（100）表面不需要设置用于固定绳索（200）的零件，主动轴（100）的表面光滑，避免了绳索（200）与主动轴（100）表面的零件产生干涉。

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，包括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；换能器单元可以在所摆动范围内的每个角度发射超声波并接收带有人体组织信息的回波，因而可以在该范围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。绳索驱动装置包括被动轴、滑轮、探头传动装置。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的一端，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，在主动轴上上设置有一个平面，通过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，有必要提供一种可以避免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，开设有径向孔和径向孔，所述径向孔与所述径向孔相通；
绳索，经由所述径向孔伸入所述径向孔；
固定件，设于所述径向孔内将所述绳索固定于所述径向孔内。
上述的探头传动装置，在主动轴上开设有径向孔和径向孔，绳索经由径向孔伸入至径向孔，通过设于径向孔的固定件固定绳索。该探头传动装置的结构简单，主动轴表面不需要设置用于固定绳索的零件，主动轴的表面光滑，避免了绳索与主动轴表面的零件产生干涉。
【附图说明】
在附图中，类似的附图标记表示相同的、功能上类似的和/或结构上类似的元件。应该理解，这些附图仅用于描绘各具体实施例，而不应被认为是对范围的限制。
图1为一实施方式的探头传动装置的结构剖面示意图；
图2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3为一实施方式的探头传动装置的结构剖面示意图；
图4为一实施方式的探头传动装置的立体结构示意图；
图5为一实施方式的固定销的结构示意图；及
图6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】
为了便于理解本发明，下面将参照相关附图对本实用新型进行更全面的描述。附图中给出了本实用新型的首选实施例。但是，本实用新型可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本实用新型的公开内容更加透彻全面。
需要说明的是，当元件被称为“固设于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本实用新型的技术领域的技术人员通常理解的含义相同。本文中在本实用新型的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本实用新型。本文所使用的术语“及／或”包括一个或多个相关的所列项目的任意的和所有的组合。
一实施方式的探头传动装置，如图1、图2所示，探头传动装置包括主动轴100、固定杆300和绳索200。主动轴100上开设有径向孔120和径向孔140。径向孔140与径向孔120相通。绳索200经由径向孔140伸入径向孔120并收容在径向孔120内。固定杆300收容于径向孔120内并将绳索200固定于径向孔120内。可以理解，固定杆300还可以由其他设于径向孔120内的固定件替代，例如使用符合强度要求的蜡、胶等，在液态时注入径向孔120，固化后将绳索200固定于径向孔120内。
在一实施方式中，径向孔120的中轴线与主动轴100的中轴线平行。由于径向孔120的中轴线与主动轴100的中轴线平行，收容于径向孔120内的固定杆300的受力均匀，能增加固定杆300的使用寿命。进一步地，径向孔120的中轴线与主动轴100的中轴线平行，固定杆300沿着径向孔120延伸方向设置，呈水平状态，不容易从径向孔120中脱落。可以理解的是，在其他实施例中，径向孔120的中轴线也可以与主动轴100的中轴线不平行设置。
请参阅图3，具体地，径向孔120开设于主动轴100轴心处，使得主动轴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，进而延长了驱动电机的使用寿命并提高了使用效率。
径向孔140开设在主动轴100上，且与径向孔120相通。在本实施方式中，径向孔140的中轴线与主动轴100的中轴线垂直，从而，绳索200的受力方向与径向孔140孔径方向一致，绳索200与径向孔140的孔壁之间的摩擦较小，且受力均匀，能够增加绳索200的使用寿命。可以理解的是，在其他实施例中，径向孔140可以斜设于主动轴100，即径向孔140的中轴线与主动轴100的中轴线不需要垂直设置。
在其中一个实施例中，如图3所示，径向孔140的数量为两个，两个径向孔140分布于主动轴100的不同径面，即在两个径向孔140之间在主动轴100的轴向上存在一定距离。主动轴100进行传动时，绳索200缠绕于主动轴100上，绳索200与主动轴100之间不会产生干涉。在其他实施例中，径向孔140的数量也可以为一个。当只有一个径向孔140时，绳索200的两端分别伸入径向孔140中，并通过固定杆300固定在主动轴100中。主动轴100的表面不需要设置用于固定绳索200的零件，绳索200与主动轴100之间不会产生干涉。
本一实施方式中，如图6所示，两个径向孔140的中心轴线与主动轴100的中轴线位于同一平面。且两个径向孔140分布于主动轴100的不同径面。主动轴100的径面为沿着主动轴100的径向的截面。在使用一根绳索200进行传动时，绳索200的两端分别伸入一个径向孔140中并固定在径向孔120中。在使用两根绳索200进行传动时，两根绳索200与主动轴100相连的一端分别伸入一个径向孔140中并固定径向孔120中。在主动轴100转动过程中，两根绳索200可沿各自的径面缠绕主动轴100，不会与主动轴100的表面任何其他零件干涉，转动轴转动角度大，避免出错。更进一步地，两个径向孔140的中轴线在同一平面中，且两个中轴线形成180度的角。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。主动轴100受力较均衡，转动时也较平稳。在其他实施例中，两个径向孔140的中轴线也可以形成90度、70度等角度。
更进一步地，在其中一个实施例中，径向孔120和径向孔140为沉头孔，径向孔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，径向孔140为沉头孔可使径向孔140外扩，便于绳索200伸入径向孔140中。
固定杆300收容在径向孔120内，固定杆300的一端挤压绳索200并使绳索200与径向孔120内壁紧密贴合。在一实施方式中，径向孔140的数量为两个。绳索200的两端分别穿过对应的一个径向孔140并伸入至径向孔120内，固定杆300抵压两根绳索200处的直径略大于径向孔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抵压在径向孔120的孔底。
具体的，在一实施方式中，如图4所示，固定杆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固定于径向孔120的内壁。安装时，绳索200的两端分别穿过一个径向孔140并延伸至径向孔120内，固定销340置于径向孔120内，装入螺钉320固定绳索200。固定销340的长度设置成可卡住距离径向孔120的开口端最远处的绳索200。固定销340的直径与绳索200的两倍直径之和大于径向孔120的直径，可以确保能将绳索200压紧固定于径向孔120的内壁。固定销340与螺钉320活动连接，可根据距离径向孔120的长度更换不同长度的固定销340，根据径向孔120孔径和绳索200的直径更换不同直径的固定销340。
进一步地，主动轴100的径向孔120的内壁上开设有与螺钉320匹配的螺纹。螺钉320与径向孔120的内壁上螺纹配合，使得螺钉320与主动轴100的连接更为稳固，可防止在使用过程中螺钉320和径向孔120发生相对位移，造成绳索200的松动。进一步地，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。
具体的，在一实施方式中，如图4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的连接部342收容在空心的螺钉320，固定销340的卡合部344伸入径向孔120内将绳索200固定于径向孔120的内壁处。在安装或拆卸的时候，固定销340的连接部342的装入或取出方便。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5所示，固定销340的卡合部344的远离连接部342的一端的直径逐渐减小。可通过调节固定销340的伸入位置来调节固定销340的卡合部344与径向孔120的侧壁之间的间隙，从而可以控制绳索200的松紧状态。卡合部344的长度及直径大小的变化可根据绳索200的直径、两端绳索的距离以及径向孔120的大小来计算，以保证两段绳索200具有足够的压缩量。
上述的探头传动装置的主动轴100上开设有径向孔120和径向孔140，绳索200伸入径向孔140，并通过收容于径向孔120内的固定杆300固定。该探头传动装置结构简单，主动轴100表面不需要设置用于固定绳索200的零件，主动轴100表面光滑，避免了绳索200与主动轴100表面的零件产生干涉。
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 (15)

  1. 一种探头传动装置，其特征在于，包括：
    主动轴，开设有轴向孔和径向孔，所述径向孔与所述径向孔相通；
    绳索，经由所述径向孔伸入所述径向孔；及
    固定件，设于所述径向孔内将所述绳索固定于所述径向孔内。
  2. 根据权利要求1所述的探头传动装置，其特征在于，所述固定件为固定杆，所述固定杆收容于所述径向孔内。
  3. 根据权利要求2所述的探头传动装置，其特征在于，所述固定杆将所述绳索抵压于所述径向孔的内壁，所述固定杆抵压所述绳索处的直径大于所述径向孔的直径与两倍所述绳索的直径之差。
  4. 根据权利要求2所述的探头传动装置，其特征在于，所述固定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径向孔的内壁。
  5. 根据权利要求4所述的探头传动装置，其特征在于，所述径向孔的内壁上开设有与所述螺钉匹配的螺纹，所述螺钉与所述径向孔的内壁螺纹连接。
  6. 根据权利要求4所述的探头传动装置，其特征在于，所述螺钉为空心螺钉，所述固定销的一端收容于所述空心螺钉。
  7. 根据权利要求6所述的探头传动装置，其特征在于，所述固定销包括连接部和与所述连接部相连的卡合部，所述连接部收容于所述空心螺钉，所述卡合部将所述绳索固定于所述径向孔内壁。
  8. 根据权利要求7所述的探头传动装置，其特征在于，所述固定销的卡合部远离所述连接部的一端的直径逐渐减小。
  9. 根据权利要求1所述的探头传动装置，其特征在于，所述径向孔的数量为两个，两个所述径向孔分布在所述主动轴的不同径面上。
  10. 根据权利要求9所述的探头传动装置，其特征在于，两个所述径向孔的中轴线与所述主动轴的中轴线位于同一平面。
  11. 根据权利要求1所述的探头传动装置，其特征在于，所述径向孔的中轴线与所述主动轴的中轴线垂直。
  12. 根据权利要求1所述的探头传动装置，其特征在于，所述径向孔的中轴线与主动轴的中轴线平行。
  13. 根据权利要求1所述的探头传动装置，其特征在于，所述径向孔开设于所述主动轴的轴心。
  14. 根据权利要求1所述的探头传动装置，其特征在于，所述径向孔为沉头孔。
  15. 根据权利要求1所述的探头传动装置，其特征在于，所述径向孔为沉头孔。
PCT/CN2014/074222 2013-06-19 2014-03-27 探头传动装置 Ceased WO2014201889A1 (zh)

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