• 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:

    公开号:SE533862C2
    申请号:SE0801278
    申请日:2008-05-30
    公开日:2011-02-15
    发明作者:Jens Reimer
    申请人:Bosch Rexroth Teknik Ab；
    IPC主号:
    专利说明:

    l0 20 25 30 533 862 2 hot addition clumsy. In the case of long pneumatic cylinders in particular, effective protection of the wall of the cylinder cover over the entire stroke cannot be achieved with this technical solution.
    An object of the present invention is therefore to provide, in the case of an elongate pneumatic cylinder, a simply constructed and at the same time reliably acting means for protecting the inner surface of the cylinder cover against abrasion of the internal compression spring.
    The statement has been solved on the basis of a single-acting pneumatic cylinder according to the preamble of the independent claims 1-4 with the respective characterizing features.
    The invention includes in a first variant, for internal radial conduction of compression spring along the stroke of the piston, according to the technical theory that at least one support element is stationary mounted inside compression spring, the support element surrounding the piston rod for axial conduction of compression spring, and to prevent contact between compression spring and the inner wall of the cylinder head during the piston stroke.
    The invention includes a second variant, for external radial conduction of compression spring along the stroke of the piston, according to the technical theory that at least one support element is arranged around compression spring, the support element for conduction of compression spring sliding along the inner wall of the cylinder housing, to prevent contact between compression spring and the inner wall of the cylinder head during the piston stroke.
    The advantage of the inventive solution according to the two alternative embodiments is that such a support element can be manufactured in a simple manner - for example in the form of a plastic-sprayed part - and depending on the length of the compression spring can be applied to it at suitable places along the axial distance. Thus, the inventive solution offers a large fl flexibility with respect to different length pneumatic cylinders. In both embodiments, the solution according to the invention further ensures the maintenance of a constant radial distance between the pressure spring and the inner wall of the cylinder housing, which can be dimensioned in a simple manner.
    According to a preferred embodiment of the invention, the compression spring consists of alternating sections with larger and smaller cross-sections. This finding promotes the application of the support element.
    In the case of a support element to be fitted inside the compression spring, this is preferably pressed into a section with a smaller cross-section of the compression spring. This achieves a simple assembly as well as a reliably fixed seat for the support element in the compression spring.
    In the case of a support element pushed onto the compression spring, this can be arranged either in a section with a larger cross-section or in a section with a smaller cross-section of the compression spring. A particularly simple assembly is ensured when the support element is arranged in a section with a larger cross section of the compression spring. On the other hand, better suspension properties are obtained when the support element is applied to the compression spring in a section with a smaller cross-section.
    In addition to a connection between the support element and the compression spring as a press fit, a stationary fastening can also be realized with the aid of mechanical fastening means. As mechanical fastening means, for example, at least one screw can serve, which is screwed into the support element between adjacent winding turns in the compression spring. This also secures the support element against displacement.
    If, due to the length of the single-acting pneumatic cylinder, only one support element is required, this should preferably be arranged in the central area of the compression spring. For in this area, in the case of an omitted support element, the greatest danger would exist for damage to the inner wall of the cylinder housing by the abrasive pressure fi on the other hand.
    In addition, the compression spring can also be fixed on one side in such a way that an optimal gap distance is ensured against the inner wall of the cylinder housing. At the end of the cylinder cover side, compression spring can correspondingly come into abutment against a centering element, which is arranged stationary against the cylinder cover. The centering element can at the same time have a continuous channel for guiding the piston rod, so that a cylinder cover is provided with a single component.
    On the other hand, according to a further, improvement-improving measure, the pressure spring can be located relative to the opposite end via a centering area for the piston, in order to prevent the pressure spring from contacting the inner wall of the cylinder housing. This centering area can be in the form of a socket formed directly on the piston at the front of the area facing the compression spring, so that this centering area can be formed with the piston in a simple manner. Further invention enhancing measures will be described in the following together with a description of preferred embodiments of the invention in connection with the figures, where fi g. 1 shows a side view through a single-acting pneumatic cylinder with a support element, fi g. 2 shows a schematic view from the side of a first embodiment with support elements arranged inside the compression spring, fi g. 3 shows a schematic view from the side of a second embodiment with support elements arranged outside the compression spring at sections with larger cross-sections and fi g. 4 shows a schematic side view of a second embodiment with support elements arranged outside the pressure vid at sections with smaller cross-sections.
    According to fi g. 1, the single-acting pneumatic cylinder comprises a cylinder cover 1 with the cylinder base formed directly on the same. In the area of the cylinder bottom, a pressure lock connection 2 is arranged for actuating an axially movable piston 3 arranged inside the cylinder cover 1. The piston 3 is actuated for resetting with a compression spring 4 at its opposite side. A piston rod 5 further leaves the piston 3, which leaves the cylinder cover 1 for transmitting the force generated via the compressed air.
    In order to avoid a contact between the compression spring 4 and the inner wall of the cylinder cover 1 during the piston stroke, a single support element 6 is further arranged in the central area of the compression spring 4, which support element is stationary by pressing inside the compression spring 4. The support element 6 surrounds the piston rod 4 an axial line for the support element 6 via a clearance fitting present between the two components.
    The compression spring 4 abuts at the cylinder lid side end against a centering element 10, which is arranged in the cylinder housing 1 and at the same time also has a through-going channel for the piston rod 5. Compression spring 4 is guided towards the other end via the centering area ll of the piston 3. 10 20 533 862 5 According to fi g. 2, two support elements 6a and 6b are arranged for a pressure fi spring 4. The pressure cap 4 consists of avsnitt your sections 7 with larger cross-sections, which alternate with section 8 with smaller cross-sections.
    The support elements 6a and 6b are pressed into the sections 8 with smaller cross-sections.
    According to fi g. 3, in accordance with a second embodiment, two support elements 6 ”a and 6'b are arranged outside the pressure cap 4 and surround it. These support elements 6 ° a and 6'b come into sliding contact with the inner wall of the cylinder cover 1 and thus prevent the harmful contact of the pressure spring 4 with the cylinder cover 1. In addition, the support elements 6 "a and 6'b are non-slip secured to the pressure springs 4 via a screw 9a each. resp. 9b.
    According to fi g. 4, two support elements 6 ”a and 6” b are arranged within the area of a section 8 with a smaller cross section of the pressure 4 edge 4 and here perform the same function as in the previously described embodiment.
    List of reference numerals 1 Cylinder cover 7 First section 2 Compressed air connection 8 Second section 3 Piston 9 Screw 4 Pressure 10 springs 10 Centering elements 5 Piston rod 1 1 Centering tube area 6 Support elements
    权利要求:
    Claims (9)
    [1]
    1. Single-acting pneumatic cylinder with a cylinder cover (1), on which a pressure-lock connection (2) is arranged to act on one side of an inner piston (3) to generate a force, the piston (3) being opposite side is affected by a pressure spring (4), which inside the cylinder cover (1) surrounds a piston rod (5) emanating from the piston (3), characterized in that at least one support element (6; 6a; 6b) is fixedly mounted inside the pressure cap (4). ) via press fitting, the support element (6; 6a; 6b) surrounding the piston rod (5) for axial guidance of the compression spring (4) and to prevent a contact between the compression spring (4) and the inner wall of the cylinder cover (1) during the piston stroke, wherein the compression spring is formed with at least one first section (7) with a larger cross-section and alternately with at least one arranged second section (8) with a smaller cross-section, the support element (6; 6a; 6b) being arranged at the section (7, 8) with a smaller cross-section.
    [2]
    Single-acting pneumatic cylinder with a cylinder cover (1), on which a compressed air connection (2) is arranged for actuating one side of an inner piston (3) for generating a force, the opposite side of the piston (3) being actuated of a pressure spring (4), which inside the cylinder cover (1) surrounds a piston rod (5) emanating from the piston (3), characterized in that at least one support element (6 "a, 6'b, 6" a, 6 "b ) is circumferentially mounted around the compression spring (4) via press fitting, the support element (6'a, 6'b, 6 "a, 6" b) for guiding the compression spring (4) sliding along the inner wall of the cylinder cover (1) to prevent a contact between the pressure spring (4) and the inner wall of the cylinder cover (1) during the piston stroke, the pressure cap being formed with at least a first section (7) with a larger cross-section and alternately with at least one arranged second section (8) with a smaller cross-section, the support element (6 "a , 6'b, 6 "a, 6" b) is applied to at least one section (7) with a larger cross-section, or to at least one section (8) with a smaller cross-section .
    [3]
    Single-acting pneumatic cylinder with a cylinder cover (1), on which a compressed air connection (2) is arranged for actuating one side of an inner piston (3) for generating a force, the opposite side of the piston (3) being actuated of a pressure cap (4), which inside the cylinder cover (1) surrounds a piston rod (5) emanating from the piston (3), characterized in that at least one support element (6; 6a; 6b) is fixed inside and attached to pressure fi edema ( 4) by means of mechanical fastening means, the support element (6; 6a; 6b) surrounding the piston rod (5) for axial guidance of the compression spring (4) and for preventing a contact between the compression spring (4) and the cylinder housing (1). inner wall under the piston stroke, the compression spring being formed with at least a first section (7) with a larger cross-section and alternately with at least one arranged second section (8) with a smaller cross-section, the support element (6; 6a; 6b) being arranged at the section (7, 8) with smaller cross section.
    [4]
    Single-acting pneumatic cylinder with a cylinder cover (1), on which a compressed air connection (2) is arranged for actuating one side of an inner piston (3) for generating a force, the opposite side of the piston (3) being actuated of a compression spring (4), which inside the cylinder housing (1) surrounds a piston rod (S) emanating from the piston (3), characterized in that at least one support element (6'a, 6 ° b, 6 '' a, 6 " b) is circumferentially mounted nmt and attached to the compression spring (4) by means of mechanical fastening means, the support element (6 "a, 6'b, 6" 'a, 6' 'b) for guiding the compression spring (4) sliding along the cylinder cover (1) inner wall for preventing contact between the pressure fi edema (4) and the inner wall of the cylinder cover (1) during the piston stroke, the compression spring being formed with at least a first section (7) with a larger cross-section and alternately with at least one arranged second section (8) with a smaller cross-section, wherein the support element (6 ° a, 6'b, 6 "a, 6" b) is arranged at at least one section (7) with a larger cross-section, or at min a section (8) with a smaller cross section.
    [5]
    Single-acting pneumatic cylinder according to claim 3 or 4, characterized in that the mechanical fastening means are designed as at least one screw (9a; 9b), which is screwed into the support element (6, 6a, 6b, 6'a, 6'b, 6 "A, 6" (b) adjacent winding turns on the pressure spring (4).
    [6]
    Single-acting pneumatic cylinder according to one of the preceding claims, characterized in that in that a single support element (6, 6a, 6b, 6'a, 6 ° b, 6 "a, 6" b) is arranged in the central region of the compression spring (4).
    [7]
    Single-acting pneumatic cylinder according to one of the preceding claims, characterized in that the compression spring (4) abuts the cylinder cover (1) at a first end via a centering element (10) which provides a radial gap between the compression spring (4) and the cylinder cover. pan (l). 533 862 8
    [8]
    Single-acting pneumatic cylinder according to Claim 7, characterized in that the centering element (10) has a through-going channel for the line of the piston rod (5).
    [9]
    Single-acting pneumatic cylinder according to one of the preceding claims, characterized in that the pressure spring at a second end is guided via a centering zone (11) of the piston (3) in order to prevent a contact between the pressure spring (4) and the inner wall of the cylinder housing (1).
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    同族专利:
    公开号 | 公开日
    DE102007025566A1|2008-12-04|
    SE0801278L|2008-12-01|
    DE102007025566B4|2009-02-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE7921874U1|1980-01-03|Schroeder, Werner, 8157 Dietramszell|Compressed air driven working cylinder|
    DE2704703A1|1977-02-04|1978-08-10|Schroeder Werner|Pneumatic drive for heavy vehicle brakes - has connecting channel between cylinder chambers sealed by back pressure valve reacting to high pressure|
    DE3214777A1|1982-04-21|1983-10-27|Ernst 7996 Meckenbeuren Hunger|Single-acting pneumatic cylinder|
    JP4622717B2|2005-07-19|2011-02-02|株式会社アドヴィックス|Plunger type master cylinder|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE200710025566|DE102007025566B4|2007-05-31|2007-05-31|Single-acting pneumatic cylinder|
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