WO2024092873A1 - 一种扩展工具用间歇旋转结构及扩展工具 - Google Patents
一种扩展工具用间歇旋转结构及扩展工具 Download PDFInfo
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- WO2024092873A1 WO2024092873A1 PCT/CN2022/131602 CN2022131602W WO2024092873A1 WO 2024092873 A1 WO2024092873 A1 WO 2024092873A1 CN 2022131602 W CN2022131602 W CN 2022131602W WO 2024092873 A1 WO2024092873 A1 WO 2024092873A1
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- rotating
- tooth
- gear
- sleeve
- ejector pin
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- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
Definitions
- the invention relates to the field of expansion tools, and in particular to an intermittent rotating structure for an expansion tool and the expansion tool.
- PEX cross-linked polyethylene
- Polymer pipe fittings have good toughness and use the characteristics of the pipe mouth to slowly shrink after being expanded. They are connected to the joint before the pipe mouth is fully contracted. After fully contracting, the pipe mouth is tightly wrapped around the joint. The closer the expanded pipe mouth is to a circle, the better the airtightness between it and the connector.
- a typical building will have many joints, so it can be seen that the installation of pipe fittings involves expanding the pipe mouths of many pipes. At present, there is an expansion tool on the market.
- an intermittent rotating structure for an expansion tool comprising: a rotating cam, a roller and an ejector pin, wherein the roller is rotatably arranged at the tail of the ejector pin, the roller is in contact with and connected to the circumferential side wall of the rotating cam, the front end of the ejector pin is sleeved with a rotating sleeve, the tail of the ejector pin is sleeved with a guide sleeve, the outer wall of the ejector pin located in the rotating sleeve and the guide sleeve is sleeved with a spring, the ejector pin moves along the direction of the guide groove arranged on the guide sleeve, the outer wall of the rotating sleeve is transmission-equipped with a rotating gear, and a plurality of extensions are arranged on the end surface of the rotating sleeve near the front end of the ejector pin
- An incomplete gear is provided on the end surface of the rotating cam, and a first driven gear is provided on one side of the incomplete gear.
- An extension rod is provided on the first driven gear, and the extension rod extends to the rotating gear and is transmission-connected to the rotating gear through a second driven gear.
- the incomplete gear is provided with a meshing tooth
- the first driven gear includes a first tooth seat and a first driven tooth provided on the first tooth seat and transmission-connected to the meshing tooth on the incomplete gear.
- the incomplete gear includes a tooth seat and an engaging tooth arranged on the tooth seat, the engaging tooth is a conical tooth, a notch is provided on the tooth seat where the engaging tooth is provided, the side of the first tooth seat is a regular polygon, the first driven tooth is a conical tooth, and the first driven tooth is transmission-connected to the engaging tooth.
- the side edge of the first tooth seat is in contact with the side surface of the tooth seat of the incomplete gear close to the engaging tooth, and the corners of the two connected sides of the first tooth seat transitionally rotate through the notch set on the tooth seat of the incomplete gear.
- the regular polygon includes a regular triangle, a regular quadrilateral, a regular pentagon, a regular hexagon, a regular heptagon and a regular octagon.
- the rotating sleeve is provided with a first step near the rotating gear, the first step is provided with a plurality of protrusions, the inner wall of the rotating gear is provided with a plurality of slots, and the slots are engaged and connected with the protrusions.
- a gap is provided between the side wall of the first step and the rotating gear, and inclined surfaces are provided on the side walls of the plurality of extensions provided on the end surface of the rotating sleeve.
- one end of the rotating sleeve close to the guide sleeve is sleeved in the guide sleeve.
- a second step is provided on the inner wall of one end of the rotating sleeve close to the guide sleeve
- a third step extending outward is provided on the rear end of the ejector pin, and both ends of the spring are respectively abutted against the second step and the third step.
- an expansion tool comprising the intermittent rotating structure for an expansion tool as described in any one of the above-mentioned invention contents, and also comprising a casing, a fixed sleeve and a conical expansion head, wherein the intermittent rotating structure for the expansion tool is arranged in the casing, the front ends of the ejector pin and the rotating sleeve extend from the casing, the fixed sleeve is arranged on the rotating sleeve and fixedly connected to the casing, the conical expansion head is movably and detachably arranged on the fixed sleeve, and the ejector pin is used to expand the conical expansion head.
- the beneficial effects achieved by the above technical scheme include: the setting of the incomplete gear in the present structure and the cooperation with the first driven gear effectively realize intermittent transmission.
- the first driven gear is driven to rotate a certain angle, thereby driving the extension rod and the second driven gear to rotate intermittently, and further driving the rotating gear to rotate intermittently
- the rotating gear drives the rotating sleeve to rotate intermittently
- the rotating sleeve drives the conical expansion head to rotate intermittently, thereby effectively realizing the intermittent rotation of the conical expansion head, so that the expanded part of the pipe fitting is circular, which is easier to match with the joint, and also avoids the problems of loose matching and penetration in non-circular shapes
- the intermittent rotation structure is not only simple in structure, but also easy to operate, and does not require an additional power source.
- FIG1 is a schematic diagram of an intermittent rotating structure of an expansion tool according to a specific embodiment
- Fig. 2 is a cross-sectional view of the intermittent rotating structure of the expansion tool according to the specific embodiment
- FIG3 is a schematic diagram of the structure of an incomplete gear according to a specific embodiment
- FIG4 is a schematic diagram of the installation structure of the incomplete gear and the first driven gear according to the specific implementation manner
- FIG5 is a schematic diagram of the installation structure of the rotating sleeve according to the specific implementation method
- FIG6 is a schematic diagram of the installation structure of the rotating sleeve and the rotating gear according to a specific embodiment
- FIG7 is a schematic diagram of the installation structure of the conical expansion head according to a specific embodiment
- FIG. 8 is a cross-sectional view of the expansion tool according to the specific embodiment.
- the present embodiment provides an intermittent rotating structure for an expansion tool, comprising: a rotating cam 101, a roller 201 and an ejector pin 301, wherein the roller is rotatably arranged at the tail of the ejector pin, and the roller is in contact with the circumferential side wall of the rotating cam 101, the front end of the ejector pin is sleeved with a rotating sleeve 401, the tail of the ejector pin is sleeved with a guide sleeve 501, the outer wall of the ejector pin located in the rotating sleeve and the guide sleeve is sleeved with a spring 202, the ejector pin moves along the guide groove 502 provided on the guide sleeve, the outer wall of the rotating sleeve is provided with a rotating gear 601 for transmission, and a plurality of extension portions 402 are provided on the end surface of the rotating sle
- the roller 201 rolls along the circumferential side wall of the rotating cam, thereby driving the ejector pin to reciprocate in the rotating sleeve and the guide sleeve.
- the ejector pin extends out of the rotating sleeve.
- the front end of the ejector pin 301 drives the conical expansion head to expand, thereby expanding the pipe fitting.
- the conical expansion head 106 adopts the existing For some conical expansion heads 106, as shown in FIGS. 7 and 8 , as the rotating cam rotates, the roller gradually rolls to the concave portion of the rotating cam.
- an intermittent rotation structure is provided in this embodiment.
- the first driven gear 801 is driven by the incomplete gear 7, and then the extension rod 802 and the second driven gear 803 are driven.
- the second driven gear drives the rotating gear to rotate intermittently, thereby driving the rotating sleeve to rotate, and realizing the intermittent rotation between the rotating sleeve and the conical expansion head.
- the rotating sleeve drives the conical expansion head to rotate a certain angle, and the pipe fitting is expanded again after changing the position, so that the pipe fitting is as circular as possible after the pipe expansion, so that the pipe fitting and the joint are better matched.
- the rotating cam is connected to the motor (not shown in the figure) in the expansion tool through the rotating shaft 102, and both ends of the rotating shaft 102 are fixed in the housing 104 through bearings 103; when the motor starts working and drives the rotating shaft 102 to rotate, the rotating cam rotates accordingly and starts working.
- one end of the rotating sleeve 401 close to the guide sleeve 501 is sleeved in the guide sleeve.
- a second step 406 is provided on the inner side wall of the end of the rotating sleeve 401 close to the guide sleeve, and a third step 302 extending outward is provided at the rear end of the ejector pin, and both ends of the spring 202 are respectively abutted against the second step and the third step 302.
- the incomplete gear 7 is provided with a meshing tooth 702, and the first driven gear 801 includes a first tooth seat 8011 and a first driven tooth 8012 provided on the first tooth seat and drivingly connected to the meshing tooth on the incomplete gear.
- the incomplete gear 7 includes a tooth seat 702 and a meshing tooth 701 provided on the tooth seat, the meshing tooth is a conical tooth, a notch 703 is provided on the tooth seat 702 where the meshing tooth is provided, the side of the first tooth seat is a regular polygon, the first driven tooth is a conical tooth, and the first driven tooth is drivingly connected to the meshing tooth.
- the engaging teeth 701 and the first driven teeth 8012 are arranged as conical teeth, which can effectively improve the engaging force and make the transmission more stable;
- the side of the first gear is arranged as a regular polygon, so that when the engaging teeth and the first driven teeth are not engaged, the side can be in contact and connected with the side of the tooth seat.
- the tooth seat can position the first driven gear so that it cannot rotate, further improving the stability of the present structure, and avoiding the deviation of the fit between the engaging teeth and the first driven gear after the first driven gear rotates, so that the expansion frequency and expansion time interval of the rotating sleeve on the conical expansion head are uneven, resulting in poor expansion effect, and in severe cases, damage to the expansion tool.
- the meshing teeth of the incomplete gear can also be set at several locations according to needs, and in this case, the tooth seat at each meshing tooth is provided with a notch 703.
- the side of the first tooth seat is in contact and connected with the side surface of the tooth seat of the incomplete gear close to the engaging tooth, and the corners of the two connected sides of the first tooth seat are transitionally rotated through the notch set on the tooth seat of the incomplete gear; in this embodiment, the notch on the tooth seat is set to realize that the corners of the two connected sides of the regular polygonal first tooth seat can be rotated just through the notch, rotating from the previous side to the next side, realizing an intermittent rotation; when the engaging tooth and the first driven tooth complete an engagement, the engaging tooth disengages from the first driven tooth, and at this time, the tooth seat of the incomplete gear contacts the side of the first tooth seat of the first driven gear to realize the positioning of the first driven gear, and when the engaging tooth engages with the first driven gear again, the first driven gear completes a certain angle of rotation.
- the regular polygon includes a regular triangle, a regular quadrilateral, a regular pentagon, a regular hexagon, a regular heptagon and a regular octagon.
- it can also be other regular polygons; in this embodiment, as shown in FIG. 4 , the regular polygon is a regular pentagon.
- a first step 404 is provided on the rotating sleeve near the rotating gear, a plurality of protrusions 405 are provided on the first step, a plurality of slots are provided on the inner wall of the rotating gear, and the slots 602 are engaged with the protrusions 405; in this embodiment, the rotating sleeve 401 is connected with the rotating gear 601 through the slots and the protrusions.
- a two-way tube removal structure is provided, that is, a gap 901 is provided between the side wall of the first step and the rotating gear, and the side walls of the two sides of the several extensions provided on the end surface of the rotating sleeve are provided with inclined surfaces; in this embodiment, when the rotating sleeve and the conical expansion head are always engaged, and the conical expansion head cannot be separated from the pipe, at this time, the body of the expansion tool can be twisted in both directions.
- this embodiment further provides an expansion tool, including the intermittent rotating structure for the expansion tool described in any of the above embodiments, and also includes a housing 104, a fixed sleeve 105 and a conical expansion head 106.
- the intermittent rotating structure for the expansion tool is arranged in the housing, and the front ends of the ejector pin and the rotating sleeve extend from the housing.
- the fixed sleeve is arranged on the rotating sleeve and fixedly connected to the housing.
- the conical expansion head is movably and detachably arranged on the fixed sleeve, and the ejector pin is used to expand the conical expansion head.
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Abstract
本发明公开了一种扩展工具用间歇旋转结构，包括：旋转凸轮、滚柱和顶针，滚柱转动设于顶针的尾部，滚柱与旋转凸轮的周向侧壁接触连接，顶针的前端部套设有旋转套，顶针的尾部套设有导向套，位于旋转套和导向套内的顶针外侧壁套设有弹簧，顶针沿着导向套上设置的导向槽方向运动，旋转套外侧壁传动设有旋转齿轮，旋转套靠近顶针前端端部的端面上设有若干延伸部；旋转凸轮的端面上设有不完全齿轮，不完全齿轮一侧传动设有第一从动齿轮，第一从动齿轮上设有延伸杆，延伸杆延伸至旋转齿轮处，并通过第二从动齿轮与旋转齿轮传动连接；本方案具有结构简单、便于操作，可间歇旋转锥形扩展头的特点。
Description
本发明涉及扩展工具领域，特别涉及一种扩展工具用间歇旋转结构及扩展工具。
由于金属铜管的成本上升，聚合物管件在越来越多的居民住宅和商业建筑结构中普及。聚合物管件较常见的类型之一是由交联聚乙烯制成，俗称PEX。聚合物管件具有良好的韧性，利用管口被扩张后缓慢收缩的特性，在管口完全收缩前连接至接头，完全收缩后管口即紧密包裹于接头上，被扩张的管口越接近圆，与连接件之间的气密性越佳。一个典型的建筑将有很多接头，可见，管件的安装涉及扩展很多管道的管口。目前，市场上存在一种扩展工具，在使用的过程中发现，扩展工具的端部在伸进管件中之后，由于扩展工具是由工人手持操作，即不便于旋转，就导致管件被扩展的端部呈现非圆形状，这是由于扩展工具的端部安装的锥形扩展头的外形造成的，因此，在对管件进行扩展的时候，需要对锥形扩展头进行旋转，以使得管件被扩展后呈圆形，这样便于与接头进行适配安装，使得被扩展管口与接头紧密配合，但在扩展过程中又不能一直旋转锥形扩展头，不然无法实现对管件得扩展，因此急需提供一种扩展工具用间歇旋转结构及扩展工具以解决上述问题。
发明内容
为此，需要提供一种结构简单、便于操作，可有效旋转锥形扩展头的一种扩展工具用间歇旋转结构及扩展工具。
为实现上述目的，发明人提供了一种扩展工具用间歇旋转结构，包括：旋转凸轮、滚柱和顶针，所述滚柱转动设于顶针的尾部，所述滚柱与旋转凸 轮的周向侧壁接触连接，所述顶针的前端部套设有旋转套，所述顶针的尾部套设有导向套，位于旋转套和导向套内的顶针外侧壁套设有弹簧，所述顶针沿着导向套上设置的导向槽方向运动，所述旋转套外侧壁传动设有旋转齿轮，所述旋转套靠近顶针前端端部的端面上设有若干延伸部；
所述旋转凸轮的端面上设有不完全齿轮，所述不完全齿轮一侧传动设有第一从动齿轮，所述第一从动齿轮上设有延伸杆，所述延伸杆延伸至旋转齿轮处，并通过第二从动齿轮与旋转齿轮传动连接。
作为本发明的一种优选方式，所述不完全齿轮设有一处咬合齿，所述第一从动齿轮包括第一齿座和设于第一齿座、且与不完全齿轮上的咬合齿传动连接的第一从动齿。
作为本发明的一种优选方式，所述不完全齿轮包括齿座和设于齿座上的咬合齿，所述咬合齿为锥形齿，设有咬合齿处的齿座上开设有缺口，所述第一齿座的侧边为正多边形，所述第一从动齿为锥形齿，第一从动齿与咬合齿传动连接。
作为本发明的一种优选方式，所述第一齿座的侧边与不完全齿轮的齿座靠近咬合齿的一侧侧面接触连接，所述第一齿座相连两个侧边的拐角通过不完全齿轮的齿座上设置的缺口过渡转动。
作为本发明的一种优选方式，所述正多边形包括正三角形、正四边形、正五边形、正六边形、正七边形和正八边形。
作为本发明的一种优选方式，所述旋转套靠近旋转齿轮处设有第一台阶，所述第一台阶上设有若干凸起部，所述旋转齿轮的内壁上开设有若干卡槽，所述卡槽与凸起部卡合连接。
作为本发明的一种优选方式，所述第一台阶的侧壁与旋转齿轮之间设有间隙，所述旋转套端面上设有的若干延伸部两侧侧壁设有斜面。
作为本发明的一种优选方式，所述旋转套靠近导向套的一端套设于导向套内。
作为本发明的一种优选方式，所述旋转套靠近导向套的一端内侧壁设有第二台阶，所述顶针的后端端部设有向外侧延伸的第三台阶，所述弹簧的两端分别抵设于第二台阶和第三台阶。
为实现上述目的，发明人还提供了一种扩展工具，包括上述发明内容中任意一项所述的扩展工具用间歇旋转结构，还包括机壳、固定套和锥形扩展头，所述扩展工具用间歇旋转结构设于机壳内，所述顶针和旋转套的前端部从机壳内延伸出，所述固定套套设于旋转套上，并与机壳固定连接，所述锥形扩展头活动可拆卸的设于固定套上，所述顶针用于扩展锥形扩展头。
区别于现有技术，上述技术方案所达到的有益效果有：本结构中的不完全齿轮的设置，与第一从动齿轮之间的配合，有效的实现了间歇式传动，当不完全齿轮的咬合齿与第一从动齿轮之间齿合时，带动第一从动齿轮转动一定的角度，从而带动延伸杆和第二从动齿轮间歇式转动，进一步的带动旋转齿轮间歇式转动，旋转齿轮带动旋转套间歇式转动，旋转套带动锥形扩展头间歇式转动，从而有效的实现了对锥形扩展头的间歇式转动，使得管件被扩展的部分呈圆形状，更容易与接头进行配接，也避免了非圆形状出现配接不严，出现渗透等问题；此外，本间歇旋转结构不仅结构简单，且便于操作，无需另外提供动力源。
图1为具体实施方式所述扩展工具用间歇旋转结构示意图；
图2为具体实施方式所述扩展工具用间歇旋转结构剖视图；
图3为具体实施方式所述不完全齿轮结构示意图；
图4为具体实施方式所述不完全齿轮与第一从动齿轮安装结构示意图；
图5为具体实施方式所述旋转套安装结构示意图；
图6为具体实施方式所述旋转套与旋转齿轮安装结构示意图；
图7为具体实施方式所述锥形扩展头安装结构示意图；
图8为具体实施方式所述扩展工具剖视图。
附图标记说明：
101、旋转凸轮；102、转动轴；103、轴承；104、机壳；105、固定套；106、锥形扩展头；107、卡合处；201、滚柱；202、弹簧；301、顶针；302、第三台阶；401、旋转套；402、延伸部；403、斜面；404、第一台阶；405、凸起部；406、第二台阶；501、导向套；502、导向槽；601、旋转齿轮；602、卡槽；7、不完全齿轮；701、齿座；702、咬合齿；703、缺口；801、第一从动齿轮；8011、第一齿座；8012、第一从动齿；802、延伸杆；803、第二从动齿轮；901、间隙。
为详细说明技术方案的技术内容、构造特征、所实现目的及效果，以下结合具体实施例并配合附图详予说明。
如图1和图2所示，本实施例提供了一种扩展工具用间歇旋转结构，包括：旋转凸轮101、滚柱201和顶针301，滚柱转动设于顶针的尾部，滚柱与旋转凸轮101的周向侧壁接触连接，顶针的前端部套设有旋转套401，顶针的尾部套设有导向套501，位于旋转套和导向套内的顶针外侧壁套设有弹簧202，顶针沿着导向套上设置的导向槽502方向运动，旋转套外侧壁传动设有旋转齿轮601，旋转套靠近顶针前端端部的端面上设有若干延伸部402；旋转凸轮的端面上设有不完全齿轮7，不完全齿轮7一侧传动设有第一从动齿轮801，第一从动齿轮上设有延伸杆802，延伸杆延伸至旋转齿轮处，并通过第二从动齿轮803与旋转齿轮601传动连接。
在本实施例中，当旋转凸轮101转动时，滚柱201沿着旋转凸轮的周向侧壁滚动，从而带动顶针在旋转套和导向套内往复来回运动，当滚柱滚动到旋转凸轮的凸部时，顶针从旋转套内伸出，此时，顶针301的前端部带动锥形扩展头扩张，实现对管件的扩展，在本实施例中，锥形扩展头106采用现 有的锥形扩展头106，如图7和图8所示，随着旋转凸轮的旋转，滚柱逐渐滚动到旋转凸轮的凹部，此时，顶针301从锥形扩展头内收回，锥形扩展头收缩，变换位置后，随着顶针的不断往复运动，实现了管件的端部扩展；在本实施例中，为了使得管件扩展后尽可能的呈圆形状，使得与接头进行配接时，更加吻合，避免后期使用时，出现渗漏，在本实施例中，设置了间歇旋转结构，通过不完全齿轮7带动第一从动齿轮801，再带动延伸杆802和第二从动齿轮803，第二从动齿轮带动旋转齿轮间歇式旋转，从而带动旋转套旋转，实现旋转套与锥形扩展头之间的间歇式转动，当没完成一次扩管，旋转套即带动锥形扩展头旋转一定的角度，变换位置后再次对管件进行扩张，从而使得管件经过扩管后尽可能的呈现圆形状，使得管件与接头更好的配接。
在上述实施例中，如图7和图8所示，旋转凸轮通过转动轴102与扩展工具中的电机(图中未示出)传动连接，转动轴102的两端通过轴承103固定在机壳104内；当电机开始工作驱动转动轴102转动时，旋转凸轮随之转动，开始工作。
在上述实施例中，如图2所示，旋转套401靠近导向套501的一端套设于导向套内。旋转套401靠近导向套的一端内侧壁设有第二台阶406，顶针的后端端部设有向外侧延伸的第三台阶302，弹簧202的两端分别抵设于第二台阶和第三台阶302。
如图3和图4所示，在本实施例中，不完全齿轮7设有一处咬合齿702，第一从动齿轮801包括第一齿座8011和设于第一齿座、且与不完全齿轮上的咬合齿传动连接的第一从动齿8012。在本实施例中，不完全齿轮7包括齿座702和设于齿座上的咬合齿701，咬合齿为锥形齿，设有咬合齿处的齿座702上开设有缺口703，第一齿座的侧边为正多边形，第一从动齿为锥形齿，第一从动齿与咬合齿传动连接。在本实施例中，咬合齿701和第一从动齿8012设置成锥形齿可以有效的提高咬合力，使得传动更加稳定；将第一齿轮的侧边设置成正多边形，可以使得在咬合齿与第一从动齿没有咬合时，侧边可以与 齿座的侧面接触连接，此时，齿座可以对第一从动齿轮进行定位，使其无法转动，进一步的提高本结构的稳定性，也避免了第一从动齿轮发生转动后，咬合齿与第一从动齿轮之间的配合发生偏差，使得旋转套对锥形扩展头的扩展频率以及扩展时间间隔不均匀，造成扩展效果不好，严重的会导致扩展工具损坏。
在不同实施例中，不完全齿轮的咬合齿也可以根据需要设定若干处，此时每个咬合齿处的齿座均设有缺口703。
在上述实施例中，第一齿座的侧边与不完全齿轮的齿座靠近咬合齿的一侧侧面接触连接，第一齿座相连两个侧边的拐角通过不完全齿轮的齿座上设置的缺口过渡转动；在本实施例中，齿座上缺口的设置用于实现正多边形的第一齿座相连两个侧边的拐角处可以恰好通过该缺口进行转动，从前一个侧边转动到下一个侧边，实现一次间歇式旋转；当咬合齿与第一从动齿完成一次咬合后，咬合齿即脱离第一从动齿，此时不完全齿轮的齿座与第一从动齿轮的第一齿座侧边接触，实现对第一从动齿轮的定位，当咬合齿再次与第一从动齿轮咬合时，第一从动齿轮完成一定角度的旋转。
在上述实施例中，正多边形包括正三角形、正四边形、正五边形、正六边形、正七边形和正八边形。当然在不同的实施例中，还可以为其他正多边形；在本实施例中，如图4所示，正多边形为正五边形。
如图5和图6所示，在本实施例中，旋转套靠近旋转齿轮处设有第一台阶404，第一台阶上设有若干凸起部405，旋转齿轮的内壁上开设有若干卡槽，602卡槽与凸起部405卡合连接；在本实施例中，旋转套401与旋转齿轮601通过卡槽和凸起部传动连接。
在某些实施例中，如图6和图7所示，为了实现双向脱管，即在使用扩展工具的过程中，由于顶针的往复运动，会使得旋转套往前移动，当旋转套一直处于置顶的位置时，则会造成旋转套与锥形扩展头之间一直卡合，无法使得锥形扩展头脱离管件，在本实施例中，提供了双向脱管的结构，即在第 一台阶的侧壁与旋转齿轮之间设有间隙901，旋转套端面上设有的若干延伸部两侧侧壁设有斜面；在本实施例中，当旋转套与锥形扩展头一直卡合，锥形扩展头无法脱管时，此时，即可双向扭动扩展工具的机身，此时，旋转套端面设置的斜面402会与锥形扩展头106的卡合处107脱离开(如图7所示)，使得旋转套往后移动，第一台阶的侧壁与旋转齿轮之间设置的间隙，提供了旋转套往后移动的空间，因此，有效的实现了双向脱管的效果。
如图7和图8所示，在本实施例还提供了一种扩展工具，包括上述任意一项实施例中所述的扩展工具用间歇旋转结构，还包括机壳104、固定套105和锥形扩展头106，扩展工具用间歇旋转结构设于机壳内，顶针和旋转套的前端部从机壳内延伸出，所述固定套套设于旋转套上，并与机壳固定连接，锥形扩展头活动可拆卸的设于固定套上，顶针用于扩展锥形扩展头。
需要说明的是，尽管在本文中已经对上述各实施例进行了描述，但并非因此限制本发明的专利保护范围。因此，基于本发明的创新理念，对本文所述实施例进行的变更和修改，或利用本发明说明书及附图内容所作的等效结构或等效流程变换，直接或间接地将以上技术方案运用在其他相关的技术领域，均包括在本发明的专利保护范围之内。
Claims (10)
- 一种扩展工具用间歇旋转结构，其特征在于，包括：旋转凸轮、滚柱和顶针，所述滚柱转动设于顶针的尾部，所述滚柱与旋转凸轮的周向侧壁接触连接，所述顶针的前端部套设有旋转套，所述顶针的尾部套设有导向套，位于旋转套和导向套内的顶针外侧壁套设有弹簧，所述顶针沿着导向套上设置的导向槽方向运动，所述旋转套外侧壁传动设有旋转齿轮，所述旋转套靠近顶针前端端部的端面上设有若干延伸部；所述旋转凸轮的端面上设有不完全齿轮，所述不完全齿轮一侧传动设有第一从动齿轮，所述第一从动齿轮上设有延伸杆，所述延伸杆延伸至旋转齿轮处，并通过第二从动齿轮与旋转齿轮传动连接。
- 根据权利要求1所述的扩展工具用间歇旋转结构，其特征在于：所述不完全齿轮设有一处咬合齿，所述第一从动齿轮包括第一齿座和设于第一齿座、且与不完全齿轮上的咬合齿传动连接的第一从动齿。
- 根据权利要求2所述的扩展工具用间歇旋转结构，其特征在于：所述不完全齿轮包括齿座和设于齿座上的咬合齿，所述咬合齿为锥形齿，设有咬合齿处的齿座上开设有缺口，所述第一齿座的侧边为正多边形，所述第一从动齿为锥形齿，第一从动齿与咬合齿传动连接。
- 根据权利要求3所述的扩展工具用间歇旋转结构，其特征在于：所述第一齿座的侧边与不完全齿轮的齿座靠近咬合齿的一侧侧面接触连接，所述第一齿座相连两个侧边的拐角通过不完全齿轮的齿座上设置的缺口过渡转动。
- 根据权利要求3所述的扩展工具用间歇旋转结构，其特征在于：所述正多边形包括正三角形、正四边形、正五边形、正六边形、正七边形和正八边形。
- 根据权利要求1所述的扩展工具用间歇旋转结构，其特征在于：所述旋转套靠近旋转齿轮处设有第一台阶，所述第一台阶上设有若干凸起部，所述旋转齿轮的内壁上开设有若干卡槽，所述卡槽与凸起部卡合连接。
- 根据权利要求6所述的扩展工具用间歇旋转结构，其特征在于：所述第一台阶的侧壁与旋转齿轮之间设有间隙，所述旋转套端面上设有的若干延伸部两侧侧壁设有斜面。
- 根据权利要求1所述的扩展工具用间歇旋转结构，其特征在于：所述旋转套靠近导向套的一端套设于导向套内。
- 根据权利要求1所述的扩展工具用间歇旋转结构，其特征在于：所述旋转套靠近导向套的一端内侧壁设有第二台阶，所述顶针的后端端部设有向外侧延伸的第三台阶，所述弹簧的两端分别抵设于第二台阶和第三台阶。
- 一种扩展工具，其特征在于，包括上述权利要求1至9任意一项所述的扩展工具用间歇旋转结构，还包括机壳、固定套和锥形扩展头，所述扩展工具用间歇旋转结构设于机壳内，所述顶针和旋转套的前端部从机壳内延伸出，所述固定套套设于旋转套上，并与机壳固定连接，所述锥形扩展头活动可拆卸的设于固定套上，所述顶针用于扩展锥形扩展头。
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| CN214726466U (zh) * | 2020-11-27 | 2021-11-16 | 米沃奇电动工具公司 | 扩展工具 |
| CN114850326A (zh) * | 2021-02-03 | 2022-08-05 | 台州巨力工具股份有限公司 | 一种扩管工具的工作组件及电动液压扩管工具 |
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| US20200261959A1 (en) * | 2019-02-20 | 2020-08-20 | Milwaukee Electric Tool Corporation | Pex expansion tool |
| CN111810612A (zh) * | 2020-07-02 | 2020-10-23 | 中国科学院合肥物质科学研究院 | 一种单一驱动多向间歇输出的同心轴传动机构 |
| CN214726466U (zh) * | 2020-11-27 | 2021-11-16 | 米沃奇电动工具公司 | 扩展工具 |
| CN114850326A (zh) * | 2021-02-03 | 2022-08-05 | 台州巨力工具股份有限公司 | 一种扩管工具的工作组件及电动液压扩管工具 |
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