• 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 method for producing and a unit of a piston and a piston rod for a piston-cylinder arrangement, with a coaxial non-penetrating receiving bore (7) of the piston (1), in which the end of a piston rod (2) forming a fastening region is inserted. In this case, the piston (1) consists of a piston area (3) and a mounting hole (7) having mounting portion (4), and in the receiving bore (7) inserted mounting portion of the piston rod (2) has a radially encircling annular groove (12) , in which material of the annular groove (12) enclosing the fastening portion (4) of the piston (1) is deformed into the annular groove (12). The attachment portion (4) is deformed from a cylindrical attachment portion (4) into a conical portion (17) conically tapering in the piston rod direction.
    公开号:CH710174B1
    申请号:CH01303/15
    申请日:2015-09-09
    公开日:2019-09-30
    发明作者:Pooschen Harald
    申请人:Stabilus Gmbh；
    IPC主号:
    专利说明:

    (57) The invention relates to a method for producing and a unit comprising a piston and a piston rod for a piston-cylinder arrangement, with a coaxial, non-continuous receiving bore (7) of the piston (1) into which the end of a piston rod (2) forming an attachment area is inserted is. The piston (1) consists of a piston area (3) and a mounting section (4) with the mounting hole (7), and the mounting area of the piston rod (2) inserted into the mounting hole (7) has a radially circumferential annular groove (12) , into the material of the fastening section (4) of the piston (1) enclosing the annular groove (12) into the annular groove (12). The fastening section (4) is deformed from a cylindrical fastening section (4) into a conical section (17) tapering in the direction of the piston rod.
    Description: The invention relates to a method for producing a unit from a piston and a piston rod for a piston-cylinder arrangement, with a coaxial, non-continuous receiving bore of the piston, into which the end of a piston rod forming an attachment region is inserted, the piston being made from a Piston area and a mounting portion having the mounting hole and the mounting area inserted into the mounting hole of the piston rod has a radially circumferential annular groove.
    Such units from a piston and a piston rod have the advantage that they are medium-impermeable from one side to the other of the piston due to the non-continuous receiving bore of the piston of this piston.
    The object of the invention is to provide a method for producing a unit from a piston and a piston rod and a unit from a piston and a piston rod of the type mentioned, which with a simple and inexpensive construction, an easy to manufacture connection high security of Has piston with the piston rod.
    The method corresponds to the inventive features of claim 1. The corresponding unit to that of claim 2.
    This object is further achieved according to the invention in that the fastening section is deformed from a cylindrical fastening section into a conical tapered conical section in the direction of the piston rod.
    This method leads to a continuous flow of the material of the fastening portion into the annular groove of the piston rod in the deformation of the fastening portion, the annular groove being at least largely completely filled, which leads to a high degree of security of the connection of the piston with the piston rod.
    The continuous deformation of the fastening section in the cone section is carried out in a simple manner in that a tool having an inner cone is axially pushed onto the fastening section with the inner cone. This continuous deformation also makes it possible to deform a relatively large volume of material, which creates a connection between the piston and the piston rod with a high load capacity.
    The free end of the piston rod behind the annular groove is always guided in the receiving bore during this deferral process and thus ensures the coaxiality of the piston and piston rod.
    Since the deformed material adapts to the annular groove, there are no special requirements for the surface quality in the connection area of the piston and piston rod. Fluctuations in the hardness of the piston rods have no influence on the connection between the piston and the piston rod.
    Due to the non-continuous receiving bore of the piston, the piston is axially impermeable from one side to the other of the piston.
    A particularly high level of tightness from one side to the other of the piston is achieved in that the piston area is formed in one piece with the cone section.
    To minimize the pushing force of the tool on the fastening section, it results when the circumferential surface of the cone section by an angle between 5.5 ° and 9 °, in particular by an angle between 6.8 ° and 7.5 °; is inclined to the longitudinal axis of the piston.
    An at least largely complete inflow of the material of the fastening section into the annular groove can be achieved in that one or both side walls of the annular groove are inclined to expand the cross section of the annular groove radially outward.
    The inclination of the side walls of the annular groove is preferably between 35 ° and 55 ° to the longitudinal axis of the piston.
    An embodiment of the invention is shown in the drawing and is described in more detail below. It shows
    1 shows a longitudinal section of an interconnected unit comprising a piston and a piston rod in a cylinder,
    Fig. 2 shows a longitudinal section of the piston of the unit from a piston and a piston rod of FIG. 1 with the mounting portion of the piston still undeformed.
    The unit shown in Fig. 1 from a piston and a piston rod is slidably arranged in a cylinder 10 and has a piston 1 and a piston rod 2.
    Before assembly, the piston 1 has the shape shown in FIG. 2. It consists in one piece of a cylindrical piston region 3 and a fastening section 4, which are arranged coaxially to one another.
    The piston area 3 has on its cylindrical outer surface radially circumferential sealing groove 5, in which a sealing ring 6 is later inserted, as can be seen in FIG. 1.
    The fastening section 4 is designed as a cylindrical tube section with a smaller outside diameter than the piston region 3.
    Coaxially, the fastening section 4 has a non-continuous receiving bore 7, which is designed as a stepped bore, the small step 8 is located in the bottom region of the receiving bore 7.
    On its end facing away from the piston rod 2, the piston 1 has a non-continuous deep hole 9 into which e.g. a valve element at the opposite end of the cylinder 10 can be immersed and in this way enables a greater stroke of the piston / piston rod unit.
    The piston rod 2 is formed at one end as a fastening area 11 of reduced diameter, the diameter of the fastening area 11 corresponding to the diameter of the receiving bore 7.
    In the area of the fastening area 11, the piston rod 2 is provided with a radially circumferential annular groove 12, the side walls 13, 13 'of which are inclined radially outwardly to widen the cross section of the annular groove 12 by 45 °.
    To fasten the piston rod 2 to the piston 1, the piston rod 2 is inserted with its fastening area 11 into the receiving bore 7 until it has its end face 14 at the radial transition 15 from the small step 8 to the large step 16 of the receiving hole 7 Facility is coming.
    Now a tool, not shown, with an inner cone is pushed onto the fastening section 4 from the piston rod side with high force. The circumferential surface of the inner cone has an angle of 6.5 ° to its longitudinal axis 18. As the tool is pushed onto the fastening section 4, it is successively deformed on its outer lateral surface to form a cone section 18 and is deformed with the material on its inner surface into the annular groove 12 of the piston rod 2, so that the annular groove 12 is at least largely completely filled.
    Reference symbol list [0026]
    piston
    piston rod
    piston area
    attachment section
    seal groove
    seal
    Location hole small step
    Deep hole drilling
    cylinder
    fastening area
    ring groove
    Side wall
    13 'side wall
    front
    Transition large level
    权利要求:
    Claims (7)
    [1]
    18 longitudinal axis
    claims
    1. A method for producing a unit from a piston and a piston rod for a piston-cylinder arrangement, with a coaxial, non-continuous receiving bore (7) of the piston (1), into which the end of a piston rod (2) forming an attachment area is inserted, the piston ( 1) consists of a piston area (3) and a mounting section (4) having the mounting hole (7) and the mounting area of the piston rod (2) inserted into the mounting hole (7) has a radially circumferential annular groove (12), characterized in that a a tool having an inner cone is axially pushed onto the fastening section (4) with the inner cone, whereby the fastening section (4) is deformed from a cylindrical fastening section (4) into a conical section (17) tapering in the direction of the piston rod and thereby material of the annular groove (12 ) surrounding fastening section (4) of the piston (1) into the annular groove (12) is deformed.
    [2]
    2. Unit consisting of a piston and a piston rod for a piston-cylinder arrangement, with a coaxial non-continuous receiving bore (7) of the piston (1), into which the end of a piston rod (2) forming an attachment area is inserted, the piston (1) consisting of a Piston area (3) and a mounting section (4) having the mounting hole (7) and the mounting area of the piston rod (2) inserted into the mounting hole (7) has a radially circumferential annular groove (12) into which the material of the annular groove (12) surrounding fastening section (4) of the piston (1) is deformed into the annular groove (12), produced by the method according to claim 1, characterized in that the fastening section (4) has a conical tapered section (17) in the direction of the piston rod.
    [3]
    3. Unit according to claim 2, characterized in that the piston region (3) with the cone section (17) is integrally formed.
    [4]
    4. Unit according to one of claims 2 to 3, characterized in that the circumferential surface of the cone section (17) is inclined by an angle between 5.5 ° and 9 ° to the longitudinal axis (18) of the piston (1).
    [5]
    5. Unit according to claim 4, characterized in that the circumferential surface of the cone section (17) is inclined at an angle between 6.8 ° and 7.5 ° to the longitudinal axis (18) of the piston (1).
    [6]
    6. Unit according to one of claims 2 to 5, characterized in that one or both side walls (13, 13 ') of the annular groove (12) are inclined to expand the cross section of the annular groove (12) radially outwards.
    [7]
    7. Unit according to claim 6, characterized in that the inclination of the side walls (13, 13 ') of the annular groove (12) is between 35 ° and 55 ° to the longitudinal axis (18) of the piston (1).
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    同族专利:
    公开号 | 公开日
    DE102014113839B3|2015-10-01|
    CH710174A2|2016-03-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2306899A1|1971-08-10|1974-08-15|Bilstein August Fa|PROCEDURE FOR FASTENING END FITTINGS TO CYLINDERS|
    DE4226180A1|1992-08-07|1994-02-10|Suspa Compart Ag|Piston-rod assembly for gas damper - has connecting rod with sleeved section located in blind hole in piston|
    JP2012177437A|2011-02-25|2012-09-13|Showa Corp|Piston rod for cylinder device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014113839.2A|DE102014113839B3|2014-09-24|2014-09-24|Piston / piston rod unit|
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