WO2018103650A1 - 一种伸缩传动轴 - Google Patents

一种伸缩传动轴 Download PDF

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Publication number
WO2018103650A1
WO2018103650A1 PCT/CN2017/114683 CN2017114683W WO2018103650A1 WO 2018103650 A1 WO2018103650 A1 WO 2018103650A1 CN 2017114683 W CN2017114683 W CN 2017114683W WO 2018103650 A1 WO2018103650 A1 WO 2018103650A1
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Prior art keywords
shaft tube
intermediate shaft
spline
splines
tube
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PCT/CN2017/114683
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English (en)
French (fr)
Inventor
周明和
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辽宁丹东新弘源农业科技发展有限公司企业技术研究开发中心
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Publication of WO2018103650A1 publication Critical patent/WO2018103650A1/zh

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    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/03—Shafts; Axles telescopic
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/31—Axle

Definitions

  • This invention relates to transmission components, and more particularly to a telescopic drive shaft.
  • the drive shaft is a mechanical part commonly used in people's daily work and life. Most of the existing transmission shafts cannot be telescoped. If the purpose of the expansion and contraction is to be achieved, only the transmission shafts of different lengths can be replaced, which increases the cost, reduces the work efficiency, and improves the labor intensity of the workers.
  • the invention comprises an end shaft tube, an intermediate shaft tube and a shaft, wherein one end of the end shaft tube is a connecting flange A for connection, and the inner wall of the other end is uniformly distributed with a plurality of splines A in the circumferential direction, the intermediate shaft tube At least one end, one end of which is inserted into the other end of the end shaft tube and telescopically connected to the end shaft tube, and a plurality of splines B are uniformly distributed on the outer surface of the intermediate shaft tube in the circumferential direction, each of the flowers
  • the key B is alternately arranged with the spline A after being inserted into the other end of the end shaft tube; the outer surface of one end end of the intermediate shaft tube is uniformly distributed with a plurality of limiting blocks in the circumferential direction, and the limiting block and the An outer snap ring sleeved on the intermediate shaft tube is disposed between the splines B, and the inner wall of the other end of the intermediate shaft tube is uniformly distributed
  • the end shaft tube is divided into a first end shaft tube and a second end shaft tube, one end of the first end shaft tube is connected with the connecting flange A, and the other end is provided with a flange, and the first a flange provided at one end of the two end shaft tube is fixed, and a positioning of the opening is respectively arranged on the contact surface, and a plurality of splines A are arranged on the inner wall of the other end of the second end shaft tube in the circumferential direction;
  • the spline B of the outer surface of the intermediate shaft tube has the same number and one-to-one correspondence, and the corresponding spline B and the limiting block are on the same straight line, and the straight line and the axial direction of the intermediate shaft tube
  • the center line is parallel;
  • the length of the spline B is smaller than the length of the intermediate shaft tube, and a gap between the one end of the spline B and the limiting block is reserved for the outer snap ring, and the other end is opposite to the intermediate shaft tube
  • the other end is coplanar;
  • the outer diameter of the spline B, the outer diameter of the limiting block and the outer diameter of the outer snap ring are equal and equal to the inner diameter of the end shaft tube, the height of the spline B, the height of the limiting block, and the flower
  • the height of the key A and the height of the spline C are equal;
  • the limiting piece has a disc shape, a diameter equal to an outer diameter of the spline D, and is equal to the intermediate shaft tube Inner diameter, the height of the spline D is equal to the height of the spline C;
  • the end shaft tube and the intermediate shaft tube are collinear with the axial center line of the shaft.
  • the invention has high degree of automation, can automatically expand and contract, saves time and labor, and reduces labor intensity.
  • the end shaft tube of the present invention is divided into two, which facilitates processing the splines inside the second end shaft tube.
  • One end end portion of the intermediate shaft tube of the present invention is respectively provided with an outer snap ring and a limit block, and the outer snap ring is restricted by the limit block to prevent the outer snap ring from falling off; when the outer snap ring is extended when the intermediate shaft tube is extended, The intermediate shaft tube can be prevented from being completely withdrawn.
  • the end piece of the shaft of the present invention is provided with a limiting piece to prevent the shaft from being completely withdrawn from the intermediate shaft tube.
  • Figure 1 is a cross-sectional view showing the entire structure of the present invention
  • Figure 2 is a left side view of Figure 1;
  • Figure 3 is a cross-sectional view showing the structure of an end shaft tube of the present invention.
  • Figure 4 is a cross-sectional view showing the structure of a first intermediate shaft tube of the present invention.
  • Figure 5 is a cross-sectional view showing the structure of a second intermediate shaft tube of the present invention.
  • Figure 6 is a schematic structural view of a shaft of the present invention.
  • 1 is the first end shaft tube
  • 2 is the second end shaft tube
  • 3 is the first intermediate shaft tube
  • 4 is the second intermediate shaft tube
  • 5 is the shaft
  • 6 is the connecting flange A
  • 9 is a spline C
  • 10 is an outer snap ring
  • 11 is a limit block
  • 12 is a chamfer
  • 13 is a spline D
  • 14 is a limit piece
  • 15 is a connection flange B.
  • the present invention comprises an end shaft tube, an intermediate shaft tube and a shaft 5, wherein one end of the end shaft tube is a connecting flange A6 for connection, and the inner wall of the other end is evenly distributed in the circumferential direction.
  • a spline A7 having at least one intermediate shaft, one end of which is inserted into the other end of the end shaft tube and telescopically connected to the end shaft tube, and a plurality of circumferentially distributed outer surfaces of the intermediate shaft tube a spline B8, each spline B8 is alternately arranged with the spline A7 after being inserted into the other end of the end shaft tube; a plurality of limiting blocks 11 are evenly distributed on the outer surface of one end end of the intermediate shaft tube, the limit An outer snap ring 10 is sleeved on the intermediate shaft tube between the block 11 and the spline B8, and the inner wall of the other end of the intermediate shaft tube is uniformly provided with a plurality of splines C9 in the circumferential direction.
  • One end of the shaft 5 is inserted into the other end of the intermediate shaft tube and is telescopically connected to the intermediate shaft tube.
  • a plurality of splines D13 are evenly distributed in the circumferential direction, and each spline D13 is inserted into the intermediate shaft.
  • the inside of the other end of the tube is alternately arranged with the spline C9.
  • the end of one end of the shaft 5 is provided with a limiting piece 14 and the other end is provided with a connecting flange B15 for connection, through which the cross joint is connected.
  • the end shaft tube of the present invention is divided into a first end shaft tube 1 and a second end shaft tube 2, and the first end shaft tube 1 is Connected at one end Connecting the flange A6, connecting the cross shaft universal joint through the connecting flange A6, the other end of the first end shaft tube 1 is provided with a flange, and is fixed with a flange provided at one end of the second end shaft tube 2, and Positionings are respectively provided on the contact faces, and a plurality of splines A7 are evenly distributed in the circumferential direction on the inner wall of the other end of the second end shaft tube 2.
  • the inner diameter of the first end shaft tube 1 is the same as the inner diameter of the second end shaft tube 2.
  • the intermediate shaft tube of the embodiment is two, which are a first intermediate shaft tube 3 and a second intermediate shaft tube 4 respectively.
  • one end of the first intermediate shaft tube 3 is inserted into the second end shaft tube 2
  • the second end shaft tube 2 is telescopically connected, and a plurality of splines B8 are evenly distributed on the outer surface of the first intermediate shaft tube 3 in the circumferential direction, and each spline B8 is inserted into the other end of the second end shaft tube 2
  • the outer surface of the end portion of the first intermediate shaft tube 3 has a plurality of limiting blocks 11 in the circumferential direction, and the limiting block 11 and the spline B8 are disposed between the limiting blocks
  • the outer snap ring 10 on the intermediate shaft tube 3, the inner wall of the other end of the first intermediate shaft tube 3 is uniformly provided with a plurality of splines C9 in the circumferential direction.
  • the spline B8 of the outer surface of the first intermediate shaft tube 3 has the same number and one-to-one correspondence with the limiting block 11, and the corresponding spline B8 and the limiting block 11 are on the same straight line, and the straight line and the first intermediate shaft tube
  • the axial centerlines of 3 are parallel.
  • the length of the spline B8 is smaller than the length of the first intermediate shaft tube 3.
  • the gap between one end of the spline B8 and the limiting block 11 is reserved for the outer snap ring 10, and the other end is different from the first intermediate shaft tube 3.
  • One end is coplanar.
  • the outer diameter of the spline B8 on the first intermediate shaft tube 3, the outer diameter of the limiting block 11 and the outer diameter of the outer snap ring 10 are equal, and equal to the inner diameter of the first and second end shaft tubes 1, 2, spline B8
  • the height, the height of the limit block 11, the height of the spline A7, and the height of the spline C9 are all equal.
  • one end of the second intermediate shaft tube 4 is inserted into the first intermediate shaft tube 3, and is telescopically connected to the first intermediate shaft tube 3, and is circumferentially oriented on the outer surface of the second intermediate shaft tube 4.
  • a plurality of splines B8 are arranged, and each spline B8 is alternately arranged with the spline C9 inside the other end of the first intermediate shaft tube 3 after being inserted into the other end of the first intermediate shaft tube 3; the end portion of the second intermediate shaft tube 4 is one end
  • a plurality of limiting blocks 11 are evenly distributed on the outer surface of the outer surface, and an outer snap ring 10 sleeved on the second intermediate shaft tube 4 is disposed between the limiting block 11 and the spline B8, and the second intermediate shaft tube is disposed.
  • the other end inner wall of the fourth end is uniformly provided with a plurality of splines C9 in the circumferential direction, and the other end end portion of the second intermediate shaft tube 4 is provided with a chamfer 12 to facilitate the insertion of the shaft 5.
  • the spline B8 of the outer surface of the second intermediate shaft tube 4 has the same number and one-to-one correspondence with the limit block 11, and the corresponding spline B8 and the limiting block 11 are on the same straight line, and the straight line and the second intermediate shaft tube
  • the axial centerlines of 4 are parallel.
  • the length of the spline B8 is smaller than the length of the second intermediate shaft tube 4, and the gap between the one end of the spline B8 and the limiting block 11 is reserved for the outer snap ring 10, and the other end is the other of the second intermediate shaft tube 4.
  • One end is coplanar.
  • the outer diameter of the spline B8 on the second intermediate shaft tube 4, the outer diameter of the limiting block 11 and the outer diameter of the outer snap ring 10 are equal and equal to the inner diameter of the first intermediate shaft tube 3, and the height and limit of the spline B8.
  • the height of the bit block 11 and the height of the spline C9 are equal.
  • one end of the shaft 5 is inserted into the other end of the second intermediate shaft tube 4, and is telescopically coupled to the second intermediate shaft tube 4, and the splines D13 on the outer surface of the shaft 5 are inserted into the second intermediate shaft.
  • the inside of the other end of the tube 4 is alternately arranged with the spline C9 inside the other end of the second intermediate shaft tube 4.
  • the limiting piece 14 has a disk shape having a diameter equal to the outer diameter of the spline D13 and equal to the inner diameter of the second intermediate shaft tube 4, and the height of the spline D13 is equal to the height of the spline C9.
  • First end shaft tube 1, second end shaft tube 2, first intermediate shaft tube 3, second intermediate shaft of the present invention The tube 4 is collinear with the axial centerline of the shaft 5.
  • the working principle of the invention is:
  • the first intermediate shaft tube 3 can be expanded and contracted relative to the second end shaft tube 2
  • the second intermediate shaft tube 4 can be expanded and contracted relative to the first intermediate shaft tube 2
  • the shaft 5 can be opposite to the second After the intermediate shaft tube 4 is telescoped and fully retracted, the shaft 5, the second intermediate shaft tube 4 and the first intermediate shaft tube 3 are housed in the first and second end shaft tubes 1, 2.
  • the spline B8 on the outer surface of the first intermediate shaft tube 3 and the spline A7 in the other end of the second end shaft tube 2 are alternately inserted to prevent the first intermediate shaft tube 3 from being opposite to the second end shaft tube 2 Rotation occurs; the outer snap ring 10 at one end of the first intermediate shaft tube 3 abuts against the spline A7 in the other end of the second end shaft tube 2 when the first intermediate shaft tube 3 is extended, avoiding the first middle The shaft tube 3 is withdrawn from the second end shaft tube 2.
  • the spline B8 on the outer surface of the second intermediate shaft tube 4 is alternately inserted with the spline C9 in the other end of the first intermediate shaft tube 3 to prevent the second intermediate shaft tube 4 from rotating relative to the first intermediate shaft tube 3;
  • the outer snap ring 10 at one end of the second intermediate shaft tube 4 abuts against the spline C9 in the other end of the first intermediate shaft tube 3 when the second intermediate shaft tube 4 is extended, avoiding the second intermediate shaft tube 4 from The first intermediate shaft tube 3 is drawn out.
  • the spline D13 on the outer surface of the shaft 5 is alternately inserted with the spline C9 in the other end of the second intermediate shaft tube 4 to prevent the shaft 5 from rotating relative to the second intermediate shaft tube 4; the limit piece at one end of the shaft 5 When the shaft 5 is extended, it abuts against the spline C9 in the other end of the second intermediate shaft tube 4, and the shaft 5 is prevented from being withdrawn from the second intermediate shaft tube 4.

Abstract

一种伸缩传动轴，末端轴管（1、2）的一端为用于连接的连接法兰A（6），另一端的内壁均布有多个花键A（7），中间轴管（3、4）至少为一个，一端插入末端轴管（1、2）的另一端内，在中间轴管（3）的外表面上均布有多个花键B（8），各花键B（8）在插入末端轴管（1、2）另一端内后与花键A（7）交替布置；中间轴管（3）一端端部的外表面上均布有多个限位块（11），限位块（11）与花键B（8）之间设有套在中间轴管（3）上的外卡环（10），中间轴管（3）的另一端内壁均布有多个花键C（9）；轴（5）的一端插入中间轴管（4）的另一端内，在轴（5）的外表面上均布有多个花键D（13），各花键D（13）在插入中间轴管（4）另一端内后与花键C（9）交替布置；轴（5）一端的端部设有限位片（14），另一端设有用于连接的连接法兰B（15）。该伸缩传动轴自动化程度高，可自动伸缩，省时省力，降低了劳动强度。

Description

一种伸缩传动轴 技术领域
本发明涉及传动部件，具体地说是一种伸缩传动轴。
背景技术
传动轴是人们日常工作生活中常用到的机械零件。现有的传动轴多数不能伸缩，若想达到伸缩的目的，只能更换不同长度的传动轴，这样一来既增加了成本，又降低了工作效率，提高了工人的劳动强度。
发明内容
为了满足既能伸缩，又能实现传动功能的要求，本发明的目的在于提供一种伸缩传动轴。
本发明的目的是通过以下技术方案来实现的：
本发明包括末端轴管、中间轴管及轴，其中末端轴管的一端为用于连接的连接法兰A，另一端的内壁沿圆周方向均布有多个花键A，所述中间轴管至少为一个，一端插入所述末端轴管的另一端内、与末端轴管可伸缩地连接，在该中间轴管的外表面上沿圆周方向均布有多个花键B，各所述花键B在插入末端轴管另一端内后与所述花键A交替布置；所述中间轴管一端端部的外表面上沿圆周方向均布有多个限位块，该限位块与所述花键B之间设有套在中间轴管上的外卡环，所述中间轴管的另一端内壁沿圆周方向均布有多个花键C；所述轴的一端插入中间轴管的另一端内、与中间轴管可伸缩地连接，在该轴的外表面上沿圆周方向均布有多个花键D，各所述花键D在插入中间轴管另一端内后与所述花键C交替布置；所述轴一端的端部设有限位片，另一端设有用于连接的连接法兰B；
其中：所述末端轴管分为第一末端轴管及第二末端轴管，该第一末端轴管的一端连接有所述连接法兰A，另一端设有法兰盘、与所述第二末端轴管一端设置的法兰盘固接，并在接触面上分别设置止口定位，所述第二末端轴管的另一端内壁上沿圆周方向均布有多个花键A；
所述中间轴管外表面的花键B与限位块的数量相同、且一一对应，相对应的花键B与限位块处于同一直线上，该直线与所述中间轴管的轴向中心线平行；所述花键B的长度小于中间轴管的长度，该花键B的一端与所述限位块之间留有容置外卡环的间隙，另一端与所述中间轴管的另一端共面；
所述花键B的外径、限位块的外径及外卡环的外径均相等、且等于所述末端轴管的内径，所述花键B的高度、限位块的高度、花键A的高度及花键C的高度均相等；
所述限位片为圆盘形，直径与所述花键D的外径相等，且等于所述中间轴管 的内径，所述花键D的高度与花键C的高度相等；
所述末端轴管、中间轴管与轴的轴向中心线共线。
本发明的优点与积极效果为：
1.本发明自动化程度高，可自动伸缩，省时省力，降低了劳动强度。
2.本发明的末端轴管分为了两个，有利于加工第二末端轴管内部的花键。
3.本发明中间轴管的一端端部分别设有外卡环及限位块，通过限位块对外卡环进行限位，避免外卡环脱落；外卡环在中间轴管伸出时，可防止中间轴管完全抽出。
4.本发明轴的一端端部设置了限位片，避免轴由中间轴管完全抽出。
附图说明
图1为本发明的整体结构剖视图；
图2为图1的左视图；
图3为本发明末端轴管的结构剖视图；
图4为本发明第一中间轴管的结构剖视图；
图5为本发明第二中间轴管的结构剖视图；
图6为本发明轴的结构示意图；
其中：1为第一末端轴管，2为第二末端轴管，3为第一中间轴管，4为第二中间轴管，5为轴，6为连接法兰A，7为花键A，8为花键B，9为花键C，10为外卡环，11为限位块，12为倒角，13为花键D，14为限位片，15为连接法兰B。
具体实施方式
下面结合附图对本发明作进一步详述。
如图1、图2所示，本发明包括末端轴管、中间轴管及轴5，其中末端轴管的一端为用于连接的连接法兰A6，另一端的内壁沿圆周方向均布有多个花键A7，中间轴管至少为一个，一端插入所述末端轴管的另一端内、与末端轴管可伸缩地连接，在该中间轴管的外表面上沿圆周方向均布有多个花键B8，各花键B8在插入末端轴管另一端内后与花键A7交替布置；中间轴管一端端部的外表面上沿圆周方向均布有多个限位块11，该限位块11与花键B8之间设有套在中间轴管上的外卡环10，中间轴管的另一端内壁沿圆周方向均布有多个花键C9。轴5的一端插入中间轴管的另一端内、与中间轴管可伸缩地连接，在该轴5的外表面上沿圆周方向均布有多个花键D13，各花键D13在插入中间轴管另一端内后与花键C9交替布置。轴5一端的端部设有限位片14，另一端设有用于连接的连接法兰B15，通过该连接法兰B15连接十字万向节。
如图3所示，为了便于加工末端轴管另一端内壁上的花键A，本发明的末端轴管分为第一末端轴管1及第二末端轴管2，该第一末端轴管1的一端连接有连 接法兰A6，通过该连接法兰A6连接十字轴万向节，第一末端轴管1的另一端设有法兰盘、与第二末端轴管2一端设置的法兰盘固接，并在接触面上分别设置止口定位，第二末端轴管2的另一端内壁上沿圆周方向均布有多个花键A7。第一末端轴管1的内径与第二末端轴管2的内径相同。
本实施例的中间轴管为两个，分别为第一中间轴管3、第二中间轴管4，如图4所示，第一中间轴管3的一端插入第二末端轴管2内、与第二末端轴管2可伸缩地连接，在第一中间轴管3的外表面上沿圆周方向均布有多个花键B8，各花键B8在插入第二末端轴管2另一端内后与各花键A7交替布置；第一中间轴管3一端端部的外表面上沿圆周方向均有多个限位块11，该限位块11与花键B8之间设有套在第一中间轴管3上的外卡环10，第一中间轴管3的另一端内壁沿圆周方向均布有多个花键C9。第一中间轴管3外表面的花键B8与限位块11的数量相同、且一一对应，相对应的花键B8与限位块11处于同一直线上，该直线与第一中间轴管3的轴向中心线平行。花键B8的长度小于第一中间轴管3的长度，该花键B8的一端与限位块11之间留有容置外卡环10的间隙，另一端与第一中间轴管3的另一端共面。第一中间轴管3上花键B8的外径、限位块11的外径及外卡环10的外径均相等、且等于第一、二末端轴管1、2的内径，花键B8的高度、限位块11的高度、花键A7的高度及花键C9的高度均相等。如图5所示，第二中间轴管4的一端插入第一中间轴管3内、与第一中间轴管3可伸缩地连接，在第二中间轴管4的外表面上沿圆周方向均布有多个花键B8，各花键B8在插入第一中间轴管3另一端内后与第一中间轴管3另一端内部的花键C9交替布置；第二中间轴管4一端端部的外表面上沿圆周方向均布有多个限位块11，该限位块11与花键B8之间设有套在第二中间轴管4上的外卡环10，第二中间轴管4的另一端内壁沿圆周方向均布有多个花键C9，并且，该第二中间轴管4的另一端端部设有倒角12，便于轴5的插入。第二中间轴管4外表面的花键B8与限位块11的数量相同、且一一对应，相对应的花键B8与限位块11处于同一直线上，该直线与第二中间轴管4的轴向中心线平行。花键B8的长度小于第二中间轴管4的长度，该花键B8的一端与限位块11之间留有容置外卡环10的间隙，另一端与第二中间轴管4的另一端共面。第二中间轴管4上花键B8的外径、限位块11的外径及外卡环10的外径均相等、且等于第一中间轴管3的内径，花键B8的高度、限位块11的高度及花键C9的高度均相等。
如图6所示，轴5的一端插入第二中间轴管4的另一端内、与第二中间轴管4可伸缩地连接，轴5的外表面上各花键D13在插入第二中间轴管4另一端内后与第二中间轴管4另一端内部的花键C9交替布置。限位片14为圆盘形，直径与花键D13的外径相等，且等于第二中间轴管4的内径，花键D13的高度与花键C9的高度相等。
本发明的第一末端轴管1、第二末端轴管2、第一中间轴管3、第二中间轴 管4与轴5的轴向中心线共线。
本发明的工作原理为：
以两个中间轴管为例，第一中间轴管3可相对于第二末端轴管2伸缩，第二中间轴管4可相对于第一中间轴管2伸缩，轴5可相对于第二中间轴管4伸缩，完全缩回后，轴5、第二中间轴管4及第一中间轴管3容置于第一、二末端轴管1、2内。
在伸缩时，第一中间轴管3外表面上的花键B8与第二末端轴管2另一端内的花键A7交替插接，防止第一中间轴管3相对于第二末端轴管2发生转动；第一中间轴管3一端端部的外卡环10在第一中间轴管3伸出时，抵接于第二末端轴管2另一端内的花键A7上，避免第一中间轴管3从第二末端轴管2内抽出。第二中间轴管4外表面上的花键B8与第一中间轴管3另一端内的花键C9交替插接，防止第二中间轴管4相对于第一中间轴管3发生转动；第二中间轴管4一端端部的外卡环10在第二中间轴管4伸出时，抵接于第一中间轴管3另一端内的花键C9上，避免第二中间轴管4从第一中间轴管3内抽出。轴5外表面上的花键D13与第二中间轴管4另一端内的花键C9交替插接，防止轴5相对于第二中间轴管4发生转动；轴5一端端部的限位片14在轴5伸出时，抵接于第二中间轴管4另一端内的花键C9上，避免轴5从第二中间轴管4内抽出。

Claims (6)

  1. 一种伸缩传动轴，其特征在于：包括末端轴管、中间轴管及轴(5)，其中末端轴管的一端为用于连接的连接法兰A(6)，另一端的内壁沿圆周方向均布有多个花键A(7)，所述中间轴管至少为一个，一端插入所述末端轴管的另一端内、与末端轴管可伸缩地连接，在该中间轴管的外表面上沿圆周方向均布有多个花键B(8)，各所述花键B(8)在插入末端轴管另一端内后与所述花键A(7)交替布置；所述中间轴管一端端部的外表面上沿圆周方向均布有多个限位块(11)，该限位块(11)与所述花键B(8)之间设有套在中间轴管上的外卡环(10)，所述中间轴管的另一端内壁沿圆周方向均布有多个花键C(9)；所述轴(5)的一端插入中间轴管的另一端内、与中间轴管可伸缩地连接，在该轴(5)的外表面上沿圆周方向均布有多个花键D(13)，各所述花键D(13)在插入中间轴管另一端内后与所述花键C(9)交替布置；所述轴(5)一端的端部设有限位片(14)，另一端设有用于连接的连接法兰B(15)。
  2. 按权利要求1所述的伸缩传动轴，其特征在于：所述末端轴管分为第一末端轴管(1)及第二末端轴管(2)，该第一末端轴管(1)的一端连接有所述连接法兰A(6)，另一端设有法兰盘、与所述第二末端轴管(2)一端设置的法兰盘固接，并在接触面上分别设置止口定位，所述第二末端轴管(2)的另一端内壁上沿圆周方向均布有多个花键A(7)。
  3. 按权利要求1所述的伸缩传动轴，其特征在于：所述中间轴管外表面的花键B(8)与限位块(11)的数量相同、且一一对应，相对应的花键B(8)与限位块(11)处于同一直线上，该直线与所述中间轴管的轴向中心线平行；所述花键B(8)的长度小于中间轴管的长度，该花键B(8)的一端与所述限位块(11)之间留有容置外卡环(10)的间隙，另一端与所述中间轴管的另一端共面。
  4. 按权利要求1或3所述的伸缩传动轴，其特征在于：所述花键B(8)的外径、限位块(11)的外径及外卡环(10)的外径均相等、且等于所述末端轴管的内径，所述花键B(8)的高度、限位块(11)的高度、花键A(7)的高度及花键C(9)的高度均相等。
  5. 按权利要求1所述的伸缩传动轴，其特征在于：所述限位片(14)为圆盘形，直径与所述花键D(13)的外径相等，且等于所述中间轴管的内径，所述花键D(13)的高度与花键C(9)的高度相等。
  6. 按权利要求1所述的伸缩传动轴，其特征在于：所述末端轴管、中间轴管与轴(5)的轴向中心线共线。
PCT/CN2017/114683 2016-12-08 2017-12-06 一种伸缩传动轴 WO2018103650A1 (zh)

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