• 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 holder (1) for a motor-driven tool, comprising at least two clamping parts (20, 21) which are mutually movably connected to each other with at least one adjustable connecting part (3), said at least two clamping parts ( 20, 21) each have a clamping surface (20a, 2la) and these clamping surfaces are facing each other and between them a clamping space (5) is formed in which a motor-driven tool (6) can be clamped by an adjustment of the connecting part (3 ) to move the clamping parts (20, 21) towards each other. The invention is characterized in that at least one clamping part (20, 21) has at least one through hole (7) which is located next to the clamping surface (20a, 20b) on said clamping part (20, 21), so that the clamping surface (20a, 2la) will to bend when under pressure when clamping a power tool (6). Fig. 4
    公开号:SE1100543A1
    申请号:SE1100543
    申请日:2011-07-18
    公开日:2013-01-19
    发明作者:Robin Mcgougan
    申请人:Atlas Copco Ind Tech Ab；
    IPC主号:
    专利说明:

    15 20 25 30 band. The material in the tool housing in the connection area between the tool and the holder can also be damaged by such movements.
    The importance of a firm connection between the tool and the holder is reflected in the tendency of tool operators to tighten the holder too tightly when attaching it to the tool. This excessively hard attachment can in itself lead to deformation of the housing on the tool and thus damage vital internal parts, such as the gears, the motor or the element that transmits the torque.
    SUMMARY OF THE INVENTION An object of the present invention is to propose a solution to, or a reduction of, the problems associated with the prior art. Consequently, a main purpose is to reduce the risk of damage to a motor-driven tool when the motor-driven tool is firmly attached to a tool holder for a motor-driven tool.
    The invention provides a solution with a tool holder intended for a motor-driven tool which has the features stated in claim 1.
    By providing at least one clamping part comprising at least one through-hole located next to the clamping surface of the said clamping part, the clamping surface will bend when it is subjected to pressure when clamping a motor-driven tool. This bending is converted into a larger contact surface between the clamping part and the motor-driven tool, and thus the surface pressure of the motor-driven tool is reduced compared with a holder belonging to the prior art which is clamped with the same tension in the connecting part. . This significantly reduces the risk of the motorized tool being damaged when the holder is clamped.
    Further advantageous aspects of the invention are set out in the dependent claims.
    Brief Description of the Drawing Figures Advantageous embodiments of the invention are described below in more detail with reference to the accompanying drawing figures, of which: Fig. 1 shows a tool holder belonging to the prior art intended for a motor-driven tool and connected to an angled motor-driven one. tool.
    Fig. 2 shows a tool holder belonging to the prior art intended for a motor-driven tool and connected to a motor-driven tool set upright; Fig. 3 shows a holder intended for a power tool according to the invention; and Fig. 4 shows another holder intended for a power tool according to the invention.
    Detailed description Fig. 3 shows as an example a tool holder 1 intended for a motor-driven tool, which has at least two clamping parts 20, 21, which are mutually movably connected to each other by means of at least one adjustable connecting part 3. In Fig. 3, two connecting parts 3 in the form of screws are shown as an example. In the figure, the clamping part 21 has a hole (not explicitly shown) through which the screw 3 extends, and the clamping part 20 has a hole (not explicitly shown) with a thread in which the screw fits.
    Thereby, the clamping parts 20, 21 can be driven against each other by tightening the screw, whereby the tool 6 is clamped between them.
    In Fig. 3 there are two connecting parts, but only one can also suffice. A holder in accordance with that shown in Fig. 3 but with only one connecting part would mean that the two connecting parts would be rotatable relative to each other. This rotational mobility would be counteracted if the two clamping parts were close to the tool during clamping, since the tool then gets in the way and prevents the rotational movement. In order to further prevent rotational movement, the single connecting part could also comprise a guide part which is connected to a part on each of the clamping parts. Such a guide part could be a piece of material with grooves which fit together with corresponding flanges on the clamping parts, and vice versa, and allow mutual sliding but prevent mutual rotational movement of the clamping parts. Other coupling parts 3 are also conceivable as long as they allow an adjustable coupling of the clamping parts. The number of coupling parts can also be greater than 1 or 2, for example three or more, depending on the actual realization.
    As can be seen from Fig. 3, there are at least two clamping parts 20, 21. They each have their own clamping surface 20a, 2la, and these clamping surfaces 20a and 21a face each other. In the figure, the clamping surfaces are arranged in an arcuate shape with two flat portions at an angle to each other. Between the surfaces 20a, 21a a clamping space 5 is formed, i.e. the space 5 between the clamping parts will accommodate the motor-driven tool 6. The motor-driven tool 6 can be clamped by an adjustment of the connecting part 3 to bring the clamping parts 20, 21, together example by turning the screws as indicated above. A distinguishing feature of the holder 1 according to the invention is that at least one clamping part 20, 21 has at least one through hole 7 located next to the clamping surface 20a, 2la on the said clamping part 20, 21, so that the clamping surface 20a, 2la will to bend when under pressure and clamp a motorized tool 6. This bending occurs due to the relatively thin wall 10 of material between the hole 7 and the clamping surface, which will yield to something when under pressure. The bending of the clamping surface provides a larger contact surface between the clamping parts 20, 21 and the motor-driven tool 6, which results in a lower surface pressure against the motor-driven tool 6 for a given clamping tension in the connecting part or parts. As mentioned above, at least one through hole 7 is needed for this advantage to be achieved. However, additional holes can also be provided, as is the case in Fig. 3. It should be noted that although the surface pressure against the motor-driven tool will be lower, the frictional force between the motor-driven tool and the holder remains the same for a given clamping voltage in the connecting part or parts, as the contact area between the tool and the holder is increased due to the bending of the friction surface or surfaces.
    Instead of making contact substantially along a line formed by the contact points between the motorized tool and the holder as in the prior art, the contact surface in the holder according to the invention will be in the form of a surface due to the bending of the clamping surfaces according to the invention.
    As mentioned, the holder 1 for the power tool may have at least one clamping surface 20a, 2la, which comprises two flat parts. These parts can face the clamping space 5 at an angle of less than 180 ° between them, as shown in Fig. 1. This makes it possible to use the holder for the motor-driven tool together with the motor-driven tools with different diameters; each such different tool will make contact with the two flat portions of the clamping surface at slightly different positions. Thus, a universal clamping function is obtained with the tool holder.
    A special shape of the holder 1 for the motor-driven tool according to the invention would be a tool holder where each clamping surface 20a, 21a of two clamping parts 20, 21 has two flat parts facing the clamping space 5 at an intermediate angle of less than 180 °. This is similar to the shape in Figs. 3 and 4 and constitutes a stable solution which provides a firm holding of a tool.
    It should be noted that other peripheries on the clamping surfaces, even convex ones, with the correct bending of the surface, are possible.
    As has been mentioned, at least one through hole 7 should be arranged in at least one clamping part of the tool holder. A holder 1 for a power tool according to any of the embodiments of the invention where each clamping part 20, 21 has at least one such through hole 7 would give the advantage of a further reduced surface pressure against a tool which is clamped with a given clamping tension in the connecting part or parts. Since all the clamping parts in this case have a clamping surface that bends, the total distribution of surface pressure towards a clamped tool will be more even. The through holes would be located adjacent the clamping surface 20a, 21a of each such clamping member 20, 21.
    A variant of the foregoing embodiment would be a holder intended for a motor-driven tool where each clamping part 20, 21 has a through hole 7. Such an embodiment is shown as an example in Fig. 4. There is only a hole, this can mean that fewer machining steps are required in the manufacture of the tool holder and that the production cost can then be lower.
    In each of the embodiments of the tool holder according to the invention, a through hole 7 can have an elongate oval as a cross-sectional shape. This shape of the hole is shown as an example in Figs. 3 and 4 and has the advantage that it provides good flexibility along the clamping surface. In this way, motorized tools with different diameters abutting different parts of the clamping surface can be accommodated.
    The motor-driven tool holder 1 according to each of the preceding embodiments may in one embodiment have two adjusting parts 3 which connect the clamping parts 20, 21 to each other. This is an uncomplicated solution that provides a balanced pressure when clamping a motor-driven tool. This solution is shown as an example in Figs. 3 and 4.
    A suitable material for a clamping part 20, 21 with at least one hole 7 is a high-strength steel with a yield strength of about 750 to 1500 MPa, for example about 900 to 1100 MPa. This choice of material provides good flexibility with moderate material consumption and this material is not prone to fatigue either. Of course, other materials can also be used, for example other metals or synthetic materials.
    A through hole 7 in a clamping part can be filled with a material which is softer than the material in the clamping part, preferably a slightly flexible material, so that it does not impair the flexibility of the clamping surface. Filling a hole with such a material would, for example, prevent the hole from getting caught on any protruding object when the motorized tool holder is moved around.
    The invention also comprises an assembly comprising on the one hand a holder 1 for a motor-driven tool according to any of the preceding embodiments, and on the other hand a support arm 9. The assembly may further comprise a motor-driven tool 6.
    权利要求:
    Claims (9)
    [1]
    Holder (1) for a motor-driven tool, comprising at least two clamping parts (20, 21) which are mutually movably connected to each other with at least one adjustable connecting part (3), said at least two clamping parts (20, 21) each have a clamping surface (20a, 2la) and these clamping surfaces are facing each other and between them a clamping space (5) is formed in which a motor-driven tool (6) can be clamped by an adjustment of the connecting part (3) to guide the clamping parts (20, 21) facing each other, wherein at least one clamping surface (20a, 2la) has two flat parts facing the clamping space (5) at an angle of less than 180 "between them, characterized in that at least one clamping part (20, 21) has at least one through hole (7) located adjacent the clamping surface (20a, 2la) of said clamping part (20, 21), so that the clamping surface (20a, 2la) will bend when it is under pressure when clamping a power tool (6).
    [2]
    A holder (1) for a power tool according to claim 1, wherein each clamping surface (20a, 2la) of two clamping parts (20, 21) has two flat parts facing the clamping space (5) at an angle of less than l80 ° between them.
    [3]
    Holder (1) for a power tool according to any one of claims 1 or 2, wherein each clamping part (20, 21) has at least one through hole (7) located adjacent the clamping surface (20a, 2la) on each of the said clamping parts (20, 21). 10 15 20 10
    [4]
    Holder (1) for a power tool according to claim 3, wherein each clamping part (20, 21) has a through hole (7).
    [5]
    Holder (1) for a power tool according to any one of the preceding claims, wherein a through hole (7) has a cross section in the form of an elongate oval.
    [6]
    Holder (1) for a power tool according to any one of the preceding claims, wherein there are two adjusting parts (3) joining the clamping parts (20, 21).
    [7]
    Holder (1) for a power tool according to any one of the preceding claims, wherein said at least one clamping part (20, 21) with at least one through hole (7) is made of high-strength steel with a yield strength of about 750 to 1500, preferably between 900 and 1100 MPa.
    [8]
    An assembly comprising: - a holder for a power tool (1) according to any one of the preceding claims, and - a support arm (9).
    [9]
    An assembly according to claim 8, further comprising a power tool (6).
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    同族专利:
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    US8991779B2|2015-03-31|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1100543A|SE535863C2|2011-07-18|2011-07-18|Motor-driven tool holder including clamping parts with through holes|SE1100543A| SE535863C2|2011-07-18|2011-07-18|Motor-driven tool holder including clamping parts with through holes|
    CN201280034279.4A| CN103648728B|2011-07-18|2012-06-29|Power tool bracket|
    BR112014001419-1A| BR112014001419B1|2011-07-18|2012-06-29|POWER TOOL SUPPORT AND ITS ASSEMBLY|
    KR1020147004096A| KR101940842B1|2011-07-18|2012-06-29|Power tool holder|
    JP2014520586A| JP5967843B2|2011-07-18|2012-06-29|Power tool holder|
    PCT/EP2012/062710| WO2013010779A1|2011-07-18|2012-06-29|Power tool holder|
    US14/233,680| US8991779B2|2011-07-18|2012-06-29|Power tool holder|
    EP12730967.2A| EP2734339B1|2011-07-18|2012-06-29|Power tool holder|
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