• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for fine-tuning the thickness of a mechanical body. The fine adjustment is made by screwing a screw through a perforated hole and that the screw end presses against the center of a disc which by deformation acts as a sea rod against an adjacent body. In this way, the effect of the pitch of the screw is reduced to the gear ratio determined by the said sea rod. To be published with Fig. 1
    公开号:SE1050477A1
    申请号:SE1050477
    申请日:2010-05-17
    公开日:2011-11-18
    发明作者:Goeran Cewers
    申请人:Mindray Medical Sweden Ab；
    IPC主号:
    专利说明:

    When different materials are combined, it is common for the constituent materials to have different mechanical tolerances. These tolerances may consist of dimensional tolerances of the components or stiffness tolerances.
    Tolerances in the stiffness of a spring are usually quite large, which is why this also leads to mechanical dimensional tolerances at a given force, as a spring is part of a mechanical system.
    In many cases the tolerances can be improved by mechanical finishing. However, this is not always possible, in case the components are destroyed by machining, or the process becomes too costly.
    A better alternative is then to maintain the tolerances on the components and add a mechanical adjusting device.
    Examples of tolerance-critical constructions can be devices for micropositioning, control of laser beams, focusing of microscopes; atom, optical and ultrasound, semiconductor manufacturing, micropositioning sensors, spectroscopy and optical benches.
    In micropositioning, it is common for the positioning to be controlled by an actuator in the form of a piezoelectric crystal stack. A piezoelectric crystal stack has a control range of about 0.1%. At the same time, the stack may have a This leads to a need for the length of the stack. length tolerance of 0.5%. mechanical trimming.
    An easy way to do a mechanical trimming is with the help of an ordinary screw through a threaded hole through a mechanical anchorage. The rise on normal threads, even down to M2 is as much as 400 μm / rev. A trimming of a few um when is hardly possible with such a screw. One way to improve a trim screw is to provide it with two opposing threads with a slight difference in pitch. This principle is described in patent US 1,532,702. The disadvantages of this principle, however, are that it is relatively expensive, requires high surface roughness in the threads and is space consuming.
    The object of the invention is to provide a mechanical trimming with simple construction with low manufacturing costs and small dimensions.
    Summary of the invention These objects are achieved by means of the device according to the appended independent claims, wherein particular embodiments are dealt with in the dependent claims.
    The present invention thus seeks in particular to counteract, improve or eliminate one or more of the above-identified shortcomings and disadvantages in conventional technology, individually or in any combination, and at least partially solves the above-mentioned problems by providing an equipment according to the appended claims.
    The invention relates to a device and a method for fine-tuning the thickness of a mechanical body.
    The fine adjustment is made by screwing a screw through a threaded hole and pressing the end of the screw against a center of a disc or washer, which by deformation acts as a lever against an adjacent body. In this way the effect of the pitch of the screw is reduced to the gear ratio determined by said lever and the adjacent body is moved a substantially smaller distance than the screw.
    The invention can be described as a mechanical fine adjusting device comprising a first body having at least one through-threaded hole comprising an adjustable screw; a second, relatively first body, movable body designed to form at least one cavity, inwardly of the second body, when the second body is abutted against the first body; at least one washer placed between the first and the second body in such a way that the cavity, inwards the surface of the second body, faces the washer and that the edge of the cavity lies inside the projected surface of the washer and that; the edge of the cavity lies in a plane, that the projecting outer edge of the tray towards the first body lies in a plane; that the screw, when adjusted, can lift the center of the washer so that the washer acts as a lever with a first distributed abutment point against the cavity edge of the second body and a second distributed abutment point along the outer edge of the washer against the surface of the first body.
    By means of this device one can adjust the second, relative to the first body movable, body, for example by means of a screw, orthogonally relative to the surface of the second body.
    The adjustment of the second body which takes place when screwing on the screw is, due to the design of the construction, very small relative to the movement of the screw, preferably in the order of micrometers. The adjustment with the device described above can take place both vertically and horizontally depending on the location of the device. The first body is moved during the adjustment in the axial direction of the screw with a substantially smaller movement than the screw.
    When the adjustment has been completed, the washer locks the adjusting screw in its position provided a counter force is present through the other body which holds the washer in a biased position.
    Thus, the adjustment can not come loose.
    This leads to an affordable and simple way of obtaining a device that can be used for fine adjustment by micropositioning, eg control of laser beams, focusing of microscopes; atom, optical and ultrasound, semiconductor manufacturing, micropositioning sensors, spectroscopy and optical benches. For example, the device can be used for mechanical trimming of the stroke of a piezoelectric crystal stack but also for other types of actuator units.
    In some embodiments of the mechanical fine adjusting device, the washer has sliding towards the center. In some embodiments, the washer can also consist of sectioning elements directed towards the center. The tile can be circular in shape but also polygon. However, the geometry is not limited to these shapes, but may be ellipsoids or the like. The design of the tray can be in many ways as long as the general principle described herein is provided. slits meet.
    For example, the tile may have a hole in the center where But there may also be larger sections.
    The washer can also be designed so that you have a solid center, where the screw presses, with outward-facing sections or arms.
    In certain embodiments of the mechanical fine adjuster, the mechanical fine adjuster is connected in series with a mechanical temperature compensation element.
    With this configuration, the device can also, if necessary, compensate for changes in the ambient temperature, for example the stroke of an actuator unit, preferably a piezo actuator.
    In further embodiments, the mechanical fine adjustment device can be connected in series with an actuator unit and, if necessary, a mechanical temperature compensation element.
    In a second aspect, the invention comprises a method of fine-tuning in an orthogonal direction relative to the surface of the mechanical fine-adjusting device, the method comprising adjusting a screw which lifts the center of a washer so that the washer acts as a lever with a first distributed abutment point against a second, in relation to a first body movable, body cavity edge and a second distributed abutment point along the outer edge of the washer towards a surface of a first body.
    The advantages of this method are as for the equipment described above, which includes that one can in a simple and inexpensive way fine-tune the position. General Description of the Drawings These and other aspects, features and advantages of the invention are at least partially apparent and specified by the following description of embodiments of the present invention, taken in conjunction with the accompanying figures, in which Figure 1 shows in a schematic view an embodiment having a washer; Figure 2 shows a detailed view of the tray in Figure 1; Figure 3 shows an exemplary embodiment in which a thermal compensation body is combined with the fine adjustment device.
    Description of embodiments A device according to an embodiment of the invention is obtained by placing a washer 11 between a chassis 10 and a movable circular body 13. In the chassis 10 an adjusting screw 12 is located below the center of the washer 11. As the adjusting screw 12 is screwed against the chassis 10, the center of the washer 11 will rise. formed by the slots 20 in the washer 11 will then be bent upwards, the segments 22, shown in Fig. 2, and each segment can be considered as a lever acting in the outer edge of the washer 11 against the chassis 10 and at the radius according to the arrow 15 on the movable body 13. The movement from the screw can in this way be easily reduced to less than 50 μm per revolution. The underside of the movable body 13 is recessed to allow the washer 11 to bend up below it.
    This bending simultaneously provides a locking force on the screw 12 so that it does not inadvertently rotate.
    A seal 14 can be integrated in the head of the adjusting screw to seal the interior of the chassis 10 against its outside. This can be beneficial in potentially explosive atmospheres.
    Figure 3 shows an embodiment of the invention where a thermal compensation element 30 is laid in series with the fine adjustment device. Here, the thermal compensating element 30 replaces the movable circular body 13. In the present exemplary embodiment, the constituent parts are circular, however, the geometry of the device is not limited to these shapes, but the circular shape can be replaced by polygons, ellipses or the like.
    For example, a piezoelectric crystal stack may be provided inside the chassis 10 and above the circular body 13 to provide a mechanical tuning of the stroke of the crystal stack.
    Embodiments may also include applications where very small adjustment lengths are required, for example for other types of actuator units.
    权利要求:
    Claims (3)
    [1]
    A mechanical fine adjusting device comprising - an adjustable screw (12) and a first body (10) having at least one through-threaded hole which rotatably partially encloses the adjustable screw; a movable second body (13) movable relative to the first body (10) and having a cavity inwardly of the second body, the cavity housing the front end of the screw when the second body is abutted against the first body; - at least one washer (11) having a center and an outer edge and is located between the first and the second body, the cavity facing the washer and having an edge which lies inside the outer edge of the washer so that the outer edge of the washer lies between the first and second bodies ; and - that the screw, when adjusted, can lift the center of the washer so that the washer acts as a lever with a first distributed abutment point towards the cavity edge of the second body and a second distributed abutment point along the outer edge of the washer towards the surface of the first body, moving the first body in the axial direction of the screw with a substantially smaller movement than the screw.
    [2]
    The mechanical fine adjustment device according to claim 1, wherein the washer has a slot facing the center.
    [3]
    The mechanical fine adjustment device according to claim 1, wherein the washer consists of sectioning elements directed towards the center. The mechanical fine adjusting device according to claims 1-3, wherein the washer is circular. The mechanical fine adjustment device according to claims 1-3, wherein the washer is polygon. The mechanical fine adjustment device according to claims 1-5, wherein the mechanical fine adjustment device is connected in series with a mechanical temperature compensation element. The mechanical fine-tuning device according to claims 1-6, wherein an actuator unit is connected in series to the mechanical fine-tuning device and, if necessary, a mechanical temperature compensation element. A method of fine-tuning in an orthogonal direction relative to the surface of the mechanical fine-adjusting device, the method comprising adjusting a screw which lifts the center of a washer so that the washer acts as a lever with a first distributed point of attachment towards a second, relative to a first body movable, body cavity edge and a second distributed abutment point along the outer edge of the tray towards a first body surface. The method of claim 9 comprising using the mechanical fine tuning device of claims 1-7, such as for a mechanical trimming of the stroke of a piezoelectric crystal stack. The method according to claim 8 or 9, wherein the gearing of the lever is such that the first body is moved in the axial direction of the screw with a substantially smaller movement than the screw.
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    同族专利:
    公开号 | 公开日
    SE534833C2|2012-01-17|
    CN102298975B|2015-08-19|
    CN102298975A|2011-12-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3786551A|1972-04-10|1974-01-22|J Gregg|Piston puller|
    CH591072A5|1975-10-10|1977-08-31|Mettler Instrumente Ag|
    EP2008140B1|2006-04-19|2017-11-08|Raytheon Company|Adjustable optical mounting and method|
    CN100587281C|2008-10-27|2010-02-03|北京航空航天大学|Cross reed rotating flexible hinge|
    CN101692352B|2009-09-30|2012-02-01|东莞宏威数码机械有限公司|Position adjusting mechanism|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1050477A|SE534833C2|2010-05-17|2010-05-17|Mechanical fine tuning device and fine tuning method|SE1050477A| SE534833C2|2010-05-17|2010-05-17|Mechanical fine tuning device and fine tuning method|
    PCT/EP2011/057906| WO2011144581A1|2010-05-17|2011-05-16|Mechanical trimming device and trimming method|
    EP20110720093| EP2572156A1|2010-05-17|2011-05-16|Mechanical trimming device and trimming method|
    CN201110126026.7A| CN102298975B|2010-05-17|2011-05-16|Machine finish device and method for trimming|
    PCT/EP2011/058009| WO2011144642A1|2010-05-17|2011-05-17|Piezo electric controlled high-pressure valve and method for controlling a high-pressure valve|
    EP11719839A| EP2572129A1|2010-05-17|2011-05-17|Piezo electric controlled high-pressure valve and method for controlling a high-pressure valve|
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