JPH0331950B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a gas spring with a fast mounting connection, which gas spring has a container as a cylinder, in which a pressurized gas is stored. a piston rod movable relative to the container projects into the container, and the container is sealed from the outside;
A connecting element is arranged in each case on the container bottom and on the free end of the piston rod projecting from the container, which connecting element is connected to the component to be adjusted on the one hand and to the component that is fixed on the other hand. the connecting member and the corresponding piece being arranged for angular movement relative to each other and adapted to absorb tensile and compressive forces; It concerns the type in which the part and the counterpiece are formed by a hinge pin and a receiving hole adapted to the hinge pin.

In order to fix the gas spring to the component for angular movement, the component is provided with a pin which is adapted to engage the hinge eye of the gas spring so that the gas spring can be moved relative to the pin. It is known that the fixing is carried out by means of a nut screwed onto the pin. It is important in this case that this type of fastening ensures perfect mobility of the gas spring and that this nut does not loosen during operation; The configuration is complicated to install. Also,
It is also known that an angularly movable arrangement of a gas spring relative to a component is carried out by means of a so-called ball and socket joint.

It is an object of the invention to avoid the disadvantages of the known fastening types for gas springs, allowing the necessary angular movement in the adjustment range without the risk of uncoupling of the hinge point, and allowing easy access even to difficult-to-access parts. The object of the present invention is to provide a high-speed installation connection that allows easy installation and removal.

According to the invention, the receiving hole for receiving the hinge pin is provided with a mounting opening which is arranged perpendicularly or substantially perpendicularly to the force direction of the gas spring and perpendicularly to the axis of the hinge pin. It was solved by This mounting opening provided in the receiving hole allows for a simple connection with the hinge pin. In this case, the undercut in the receiving hole serves to prevent the resulting bond from breaking. This type allows quick installation and removal, and allows hinge joints to be provided even in difficult-to-access locations.

In one embodiment of the invention, the hinge pin is arranged at the end of the piston rod and has at least one spanner surface, whereas the receiving hole is fixedly connected to one of the components. The mounting opening is matched to the width of the spanner surfaces of the hinge pin. In this embodiment, the diameter of the receiving hole is larger than the width of the mounting opening, so that the receiving hole and the mounting opening form an undercut in which the gas spring is installed. This installation is carried out in a simple manner, in which the gas spring is brought into a position in which the spanner face of the hinge pin is arranged parallel to the mounting opening, and then, after being introduced into the receiving hole, the gas spring is swung into its installed position. It is done by Since the force direction of the gas spring extends in the axial direction, according to the invention the spanner surface is provided on the hinge pin parallel to the gas spring in the installation position. Advantageously, two such spanner faces are provided on the hinge pin, so that the gas spring can be introduced into the receiving hole through the mounting opening in a position offset by 90° relative to the installation position and then in the installation position. A perfect, angularly movable fixation is achieved by being pivoted to the angular position. This angular movement prevents the hinge pin from coming out of the receiving hole.
It is slightly smaller than 90°. A particularly good connection is achieved if the hinge base is constructed approximately in a U-shape and the hinge pins are arranged on both sides of a fixing pin, as shown in one embodiment of the invention, to which the piston rod is fixed. This is achieved by providing a hole extending at right angles to the pin axis.

In particular in lockable gas springs with externally actuated locking valves, a snap ring is provided which is arranged in a ring groove in the piston rod for the purpose of securing the fixed pin holding the hinge pin relative to the piston rod. A fixing pin is in contact with one side of this snap spring.
Therefore, when this fixing pin is screwed into the piston rod, the fixing pin always occupies the same position with respect to the push rod protruding from the piston rod, so there is no need to adjust the gas spring during installation. .

In a further embodiment of the invention, a hinge pin is arranged in each case on the mutually adjustable components, and a connecting part with a receiving hole and a mounting opening is in each case fixedly connected to the gas spring. As shown in one embodiment of the invention, the mounting opening has a width corresponding to the diameter of the hinge pin;
The connecting member of the gas spring is connectable to a retaining member that prevents dissociation of the connecting member from the hinge pin after installation. This retaining element also provides an undercut for the hinge pin so that it cannot become detached from the connecting element after installation.

According to one embodiment of the invention, this retaining element is designed in the form of a fork and rests on the hinge pin on both sides of the connecting element. Another holding member
In one embodiment, this retaining element is provided with two resilient arms on each side of the connecting element, each having a locking notch adapted to the contour of the hinge pin. With this configuration, a functionally reliable connection can be obtained by the snap connection between the holding member and the hinge pin.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show the arrangement of a gas spring 22 for adjusting the backrest 16 of a chair or easy chair. The gas spring 22 has a container 24 whose inner chamber 26 is filled with gas under pressure, in which a piston rod 28 with a piston 30 is movable relative to the container 24. guided and sealed from the outside. This gas spring 22 has a locking valve 34 which is opened by means of an operating lever via a thrust rod 36 projecting at the end of the piston rod. This allows the inner chamber portions 26 on both sides of the piston 30 to
a, 26b are connected through the lock valve 34 and the hole 32 in the piston rod 28, and the gas spring 22 is unlocked. A fixing pin 5 as a connecting member is attached to the end of the piston rod 28 that protrudes from the container.
0 is placed. This fixing pin 50 has hinge pins 54 on both sides. A hinge base 6 immovably coupled to a sitting part holder 10 that holds a sitting part 20
4, the hinge pin 54 is guided into a receiving hole 66 provided in the hinge base 64, so that an angularly movable support of the gas spring 22 is achieved. Insert the hinge pin 54 into the receiving hole 66 in the direction of arrow 5.
In order to install the gas spring 22 into the installation position, as shown by the dashed line in FIG.
It can be rotated by 90 degrees. In this case, the hinge pin 54 is introduced with its spanner face 56 through the mounting opening 68. Gas spring 22 is then brought into the installation position in the direction indicated by arrow 6. A coupling piece 38 is provided on the pivot shaft 40 arranged on the backrest 16. This connecting piece 38 connects the gas spring 22
The hinge eye 44 is configured to match the hinge eye 44 fixed to the container 24 of. Connect the hinge eye 44 to the piece 38
The tension sleeve 46 is then introduced into the receptacle 42 of the
The gas spring 22 is connected to the connecting piece 38 by. This approximately vertical arrangement of the tensioning sleeve 46 facilitates its installation, since it is accessible from above or from below in the installation position mentioned above.

3 and 4 show the hinge 48 on the piston rod side.
details are shown. As shown in FIG.
screwed into the For unique fixation in the axial direction, a snap spring 60 is inserted into the groove of the piston rod 28.
A fixing pin 50 is supported at one end surface side of the snap ring 60 at a screwed position. In order to prevent the fixing pin 50 from disengaging from the piston rod 28, a fixing nut 62 is provided.
is screwed onto the piston rod 28 as a counter nut to the fixing pin 50. Figures 3 and 4
As can be seen in the figure, the hinge pins 54 are located on both sides.
It has a spanner surface 56 provided parallel to the axis of the piston rod 28. A mounting opening 68 is provided for mounting the hinge pin 54 into the receiving hole 66 of the hinge base 64. This installation opening 6
8 is slightly larger than the mutual width of the spanner faces 56. When this spanner surface 56 extends parallel to the wall surface of the mounting opening 68, that is, when the piston rod 28 is directed upward, the hinge pin 54
slides with its spanner face 56 through the mounting opening 68 and into the receiving hole 66. Since the width of the mounting opening 68 is smaller than the diameter of the receiving hole 66, the piston rod 2
8 and thus by pivoting the gas spring 22 in the direction of the arrow 6, an angularly movable connection is provided between the gas spring 22 and the hinge base 64 by form-locking. This angular movement possibility is due to the gas spring 2
2 cannot be removed from the receiving hole 66 unless it is turned 90 degrees, so the angle is approximately 90 degrees. In this pivot range, the receiving hole 66 and the mounting opening 68 form an undercut for the hinge pin 54.

FIG. 5 shows a fixing pin 50 holding a hinge pin 54 which is coupled to the piston rod.
Here, a hole 172 is provided in the hinge pin 54, into which a short bearing pin 170 can be introduced for another type of fastening. Using the threaded bore 58, the fixing pin 50 is screwed into a corresponding thread on the piston rod 28. In this case, a snap ring 60 and a fixing nut 62 connected to the piston rod 28 serve to always arrange the fixing pin 50 at the same spacing relative to the release device for the locking valve.

6, 7 and 8 show an embodiment having a connecting member 278 coupled to the piston rod 228 and having a receiving hole 282 and a mounting opening 284. This connecting element 278 is also used in another form as a connecting element intended to secure the container 24 of the gas spring 22. In particular when the lockable gas spring is mounted horizontally, the hinge pin 274 connected to the component 276 to be adjusted is introduced from below into the mounting opening 284, while the retaining member 286 forms an undercut for the hinge pin 274. Since the hinge pin 274 is assembled so as to form a section, there is no risk that the hinge pin 274 will unexpectedly pop out of the receiving hole 282. As shown in FIG. 8, the retaining member 286 has resilient arms 290a, 290b located on either side of the connecting member 278. The arms 290a, 290b have locking notches 290c, 290d, and when resting on the hinge pin 274, the hinge pin 274 is engaged with the locking notches 290c, 290d. To prevent the retaining member 286 from pivoting relative to the connecting member 278, the retaining member 286 must be
86 is fastened to the connecting member 278 at its right end 288.

[Brief explanation of the drawing]

1 shows a lockable gas spring used for adjusting the backrest of chairs and easy chairs; FIG. 2 is a plan view of the gas spring in the installed position shown in FIG. 1; FIG. The figure shows the end of the gas spring on the piston rod side, Figure 4 shows the connection between the connecting member on the piston rod side of the gas spring and the hinge base, and Figure 5 shows the fixing pin with the hinge pin. FIG. 6 is a longitudinal sectional view of FIG. 7 showing an embodiment in which a connecting member having a receiving hole and a mounting opening is arranged on a piston rod of a gas spring.
A plan view of the embodiment shown in the figure and FIG. 8 are diagrams showing the arrangement of the holding member with respect to the connecting member. 5, 6...arrow, 10...sitting part holder, 16...
...backrest, 20...sitting area, 22...gas spring,
24... Container, 26... Inner chamber, 26a, 26b...
... Inner chamber part, 28 ... Piston rod, 30 ... Piston, 32 ... Hole, 34 ... Lock valve, 36 ...
Push rod, 38...Connecting piece, 40...Swivel shaft, 42
... Receiving part, 44 ... Hinge eye, 46 ... Tension sleeve, 48 ... Hinge, 50 ... Fixing pin,
54... Hinge pin, 56... Wrench surface, 58...
...Screw thread, 60...Snat spring, 62...Fixing nut, 64...Hinge base, 66...Receiving hole,
68...Mounting opening, 170...Support pin, 17
2... Hole, 228... Piston rod, 274... Hinge pin, 276... Component member, 278... Connection member, 282... Receiving hole, 284... Mounting opening, 286... Holding member, 288... End Part, 29
0a, 290b...Arm, 290c, 290d
...Latching notch.

Claims (1)

Claims: 1. A gas spring 22 with a fast mounting connection, which gas spring 22 has a container 24 as a cylinder, in which a pressurized container 24 is provided. The container 24 is filled with gas.
A piston rod 28 movable relative to the container protrudes into the container 24 and is sealed to the outside, with the container bottom and the free end of the piston rod projecting from the container. A connecting piece 50, 44 is arranged in each case, which connecting piece 50, 44 is connected on the one hand to the component 16 to be adjusted and on the other hand to the fixed component 10. 38, 64, respectively, and the connecting members 50, 44 and the corresponding pieces 38, 64 are arranged to allow angular movement relative to each other and are adapted to absorb tensile and compressive forces; The connecting members 50, 44 and the corresponding pieces 38, 64 are connected to the hinge pins 54, 274 and the receiving holes 66, 2 aligned with the hinge pins.
82,
A mounting opening 68, 284 is provided in the receiving hole 66, 282, which is arranged perpendicularly or substantially perpendicularly to the force direction of the gas spring 22 and perpendicularly to the axis of the hinge pin 54, 274. Gas spring with fast mounting connections, characterized by: 2. The hinge pin 54 is located at the end of the piston rod and has at least one spanner surface 56.
In contrast, a receiving hole 66 is provided in a hinge base 64 that is immovably connected to one component 10, and a mounting opening 68 is provided in a hinge pin 5.
4. The gas spring according to claim 1, wherein the widths of the two wrench faces are matched to each other. 3. The gas spring according to claim 2, wherein the spanner surface 56 of the hinge pin 54 is provided parallel to the axis of the gas spring 22. 4. The hinge pin 54 is arranged on both sides of a fixing pin 50, and the fixing pin 50 is provided with a hole extending perpendicularly to the pin axis for fixing the piston rod 28. 1
The gas spring described in any one of Items 1 to 3. 5. Gas spring according to any one of claims 1 to 4, wherein the hinge base 64 is configured in a U-shape and is immovably connected to one component 10. . 6 Fixed pin 50 that holds the hinge pin 54
In order to fix the piston rod 28 to the piston rod 28, a snap spring 60 is provided which is disposed in a ring groove of the piston rod 28.
A fixing pin 50 is supported on one side of 0.
A gas spring according to any one of claims 1 to 5. 7. A hinge pin 274 is arranged in each of the mutually adjustable components 10, 16, and a connecting member 278 with a receiving hole 282 and a mounting opening 284 is in each case immovably connected to the gas spring 22. Gas springs as described in Range 1. 8 The mounting opening 284 has a width corresponding to the diameter of the hinge pin 274, and the connecting member 278 of the gas spring 22 is connected to the hinge pin 27 after mounting.
Claim 7 is connectable to a retaining member 286 that prevents dissociation of the connecting member 278 from the
Gas springs listed in section. 9. The holding member 286 is configured in a fork shape, and the hinge pin 2 is attached on both sides of the connecting member 278.
9. A gas spring according to claim 8, in contact with 74. 10 The holding member 286 has two arms 290a, 290b with locking notches 290c, 290d on each side of the connecting member 278, and the locking notches 290c, 290d are aligned with the outer contour of the hinge pin 274. 9. A gas spring according to claim 9.