DE102016125139A1 - Multi-position cylinder - Google Patents

Abstract

The present invention relates to a multi-position cylinder (100) having a cylinder tube (101), a first piston (103-1) movable by a pressure medium in a first pressure chamber (105-1) in the cylinder tube (101); a second piston (103-2) movable by a pressure medium in a second pressure chamber (105-3) in the cylinder tube (101); a first passage (107-1) for supplying the pressure medium into the first pressure chamber (105-1); a second channel for supplying the pressure medium into the second pressure chamber (105-3), in which the first and the second channel (107-1, 107-3) are parallel to each other in the axial direction in a wall (109) of the cylinder tube (101) run.

Description

The present invention relates to a pneumatic multi-position cylinder.

The publication DE 10 2008 007 892 A1 relates to a fluid-operated multi-position cylinder having two drive units arranged one behind the other in a cylinder housing. The front drive unit can be positioned with the cooperation of the rear drive unit either in a retracted position, in an extended position or in an intermediate position.

It is the object of the present invention to simplify the construction of a multi-position cylinder.

This object is achieved by objects according to the independent claims. Advantageous embodiments are the subject of the dependent claims, the description and the figures.

According to a first aspect, the object is achieved by a multi-position cylinder with a cylinder tube, with a first piston which is movable by a pressure medium in a first pressure chamber in the cylinder tube; a second piston, which is movable by a pressure medium in a second pressure chamber in the cylinder tube; a first channel for supplying the pressure medium into the first pressure chamber; a second channel for supplying the pressure medium into the second pressure chamber, wherein the first and the second channel extend parallel to each other in the axial direction in a wall of the cylinder tube. By integrated in the wall of the cylinder tube channels, the pressure in the respective pressure chamber can be supplied in a simple manner from one of the two ends of the multi-position cylinder. Lateral pressure medium connections can be omitted.

In an advantageous embodiment of the multi-position cylinder, the first or the second channel are formed by a recess in the section of the sector-shaped recess in the wall of the cylinder tube. As a result, for example, the technical advantage is achieved that a high flow of the pressure medium is achieved.

In a further advantageous embodiment of the multi-position cylinder, the cylinder tube comprises an extruded profile. As a result, the technical advantage is achieved, for example, that the cylinder tube can be produced in a simple manner.

In a further advantageous embodiment of the multi-position cylinder, the extruded profile comprises radially protruding longitudinal projections which form walls of the first or second channel. As a result, for example, the technical advantage is achieved that the channels can be formed in a simple manner.

In a further advantageous embodiment of the multi-position cylinder, the cylinder tube comprises a cylindrical outer sleeve into which the extruded profile is inserted. As a result, for example, the technical advantage is achieved that the channels can be easily generated in the cylinder tube.

In a further advantageous embodiment of the multi-position cylinder, the outer sleeve is formed from a plastic material. As a result, for example, the technical advantage is achieved that the channels can be sealed in a simple manner.

In a further advantageous embodiment of the multi-position cylinder, the cylinder tube comprises a first cylinder tube sleeve for the first pressure chamber and a second cylinder tube sleeve for the first pressure chamber. As a result, for example, the technical advantage is achieved that the multi-position cylinder can be modular.

In a further advantageous embodiment of the multi-position cylinder, a first bearing cap for the first piston is placed on the first cylinder tube sleeve. As a result, for example, the technical advantage is achieved that the first piston is guided by a bearing cap of the modular multi-position cylinder.

In a further advantageous embodiment of the multi-position cylinder, the first bearing cover comprises a first inlet for the first pressure chamber. As a result, for example, the technical advantage is achieved that can be dispensed with an inlet opening in the first cylinder tube sleeve.

In a further advantageous embodiment of the multi-position cylinder, a second bearing cap for the second piston is arranged between the first cylinder tube sleeve and the second cylinder tube sleeve. As a result, for example, the technical advantage is achieved that the second piston is guided by a bearing cap of the modular multi-position cylinder.

In a further advantageous embodiment of the multi-position cylinder, the second bearing cover comprises an inlet for a second pressure chamber. As a result, for example, the technical advantage is also achieved that can be dispensed with an inlet opening in the second cylinder tube sleeve.

In a further advantageous embodiment of the multi-position cylinder, a cover plate is placed on the second cylinder tube sleeve. As a result, for example, the technical advantage is achieved that the modular multi-position cylinder can be completed.

In a further advantageous embodiment of the multi-position cylinder, the multi-position cylinder comprises at least one tension rod for holding together the multi-position cylinder, which are arranged in a channel. As a result, for example, the technical advantage is achieved that the individual components of the multi-position cylinder can be held together in a simple manner.

In a further advantageous embodiment of the multi-position cylinder, a first pressure medium connection for the first channel or a second pressure medium connection for the second channel are arranged in a cover plate. As a result, for example, the technical advantage is achieved that the pressure medium can be fed from the side of the end cover.

In a further advantageous embodiment of the multi-position cylinder, the first piston is movable by the second piston. As a result, for example, the technical advantage is achieved that multiple positions can be realized in a simple manner.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

• 1 eine schematische erste Querschnittsansicht des Mehrstellungszylinders;
• 2 eine schematische zweite Querschnittsansicht des Mehrstellungszylinders; und
• 3 eine schematische dritte Querschnittsansicht des Mehrstellungszylinders.

Show it:

• 1 a schematic first cross-sectional view of the multi-position cylinder;
• 2 a schematic second cross-sectional view of the multi-position cylinder; and
• 3 a schematic third cross-sectional view of the multi-position cylinder.

1 shows a schematic cross-sectional view of the multi-position cylinder 100 through the two pressure medium connections 127 -3 and 127-4. The multi-position cylinder 100 is a pneumatically operated cylinder and is used for pneumatic approach of several positions by means of a piston rod 131 -1. For this purpose, the multi-position cylinder includes 100 a circular cross-section cylinder tube 101 with a wall 109 in which a first piston 103 -1 and a second piston 103 -2 are movably guided.

The cylinder tube 101 is composed of two individual cylinder tube sleeves 119-1 and 119-2, between which a bearing cap 121 -2 for the piston 103 -2 is inserted. The piston 103 -1 is in the bearing cap 121 -1 led. The piston 103-2 is in the position lid 121 -2 led.

Through the cylinder tube 101 becomes the wall 109 with the parallel channels 107 educated. The bearing caps 121 -1 and 121-2 have the same outer contour as the cylinder tube sleeves 119 -1 and 119-2 on, so that the channels 107 -3 and 107-4 in the wall 109 along the cylinder tube 101 continue. In general, the cylinder tube 101 from further cylinder tube sleeves 119 and location covers 121 be composed.

The bearing caps 121 -1 and 121-2 may have the same shape so that they are at different locations within the cylinder tube 101 can be used as equal parts. This simplifies the production of the multi-position cylinder 100 ,

The stroke of the respective pistons 103 -1 and 103-2 is determined by the length of the cylinder tube sleeves 119 -1 and 119-2 given. The cylinder tube sleeves 119 -1 and 119-2 can each have a different length x and y, so that different strokes can be realized. In particular, the stroke of the piston 103 -2 be less than the stroke of the piston 103-1. In this case, the length y of the cylinder tube sleeve 119 -2 smaller than the length X of the cylinder tube sleeve 119 -1. Due to the modular design of the multi-position cylinder 100 Different strokes can be realized in a simple way.

The multi-position cylinder 100 Can be modular in a simple way by using cylinder tube sleeves 119 -1 and 119-2 different lengths are built and assembled.

The piston rod 131 -1 is the part that determines the force and movement of the multi-position cylinder 100 transfers to the outside. The tip of the piston rod 131 -1 is threaded, so that additional components can be connected by the customer. The piston rod 131 -1 generally allows for a wide variety of variations, such as a hollow or continuous design.

Opposite an inner wall of the cylinder tube 101 are the first piston 103 -1 and the second piston 103 -2 sealed by circumferential seals, so that between the bearing cap 121 -1 and the piston 103 -1 a pressure chamber 105 -1 is formed, between the piston 103 -1 and the bearing cap 121 -2 a pressure chamber 105 -2 is formed, between the bearing cap 121-2 and the piston 103 -2 a pressure chamber 105 -3 is formed and between the piston 103 -2 and the end cap 125 a pressure chamber 105 -4 is formed.

In each of the sealed pressure chambers 105 -1, ..., 105-4, a pressure medium can be fed independently of the other pressure chambers. This allows the pistons 103 -1 and 103-2 inside the cylinder tube 101 be moved independently of each other pneumatically. By a movement of the second piston 103 -2 in the direction of the bearing cap 121 -1 can be the first piston 103 -1 over the piston rod 131 -2 also be moved.

The cylinder tube 101 includes, for example, a star-shaped extruded profile 113 as a cylinder tube sleeve 119 -1 and 119-2, for example made of aluminum, that of a cylindrical outer sleeve 117 , For example, plastic, is surrounded. The star-shaped extruded profile 113 comprises in cross section part-sector-shaped recesses 111 passing through the surrounding outer sleeve 117 be closed to the outside.

The recesses 111 However, can also be formed by holes with a circular opening. In this case, the bearing caps 121 -1 and 121-2 and the end cover 125 corresponding holes. Through the holes in the bearing caps 121 -1 and 121-2 and the end cap 125 let the channels go 107 in the wall 109 along the composite cylinder tube 101 continue.

Due to the radially projecting longitudinal projections 115 of the star-shaped extruded profile 113 be in conjunction with the outer sleeve 117 eight channels 107 in the wall 109 of the cylinder tube 101 generated. The channels 107 have a sector-shaped cross-section. The bearing caps 121 For example, -1 and 121-2 have the same cross-sectional shape or outer contour as the extruded profile 113 on, leaving the channels 107 inside the cylinder tube 101 can be continued if the cylinder tube 101 is composed of the individual parts.

The channels 107 extend in the axial direction and parallel to each other along the cylinder tube 101 , The channels 107 are inside the cylinder tube 101 integrated so that they are protected from mechanical damage and the manufacture of the multi-position cylinder 100 simplified.

In these channels 107 becomes a pressure medium, such as compressed air, for the pressure chambers 105 -1, ..., 105-4 led. The pressure medium becomes the pressure chambers 105 -1, ..., 105-4 supplied, so that in this a predetermined pressure can be set. By pressure differences in the individual pressure chambers 105-1, ..., 105-4, the respective pistons 103 -1 and 103-2 moves.

In general, the number of longitudinal channels is 107 of the cylinder tube 101 any. The more channels 107 in the cylinder tube 101 are formed, the more pistons 103 can be inside the cylinder tube 101 arrange and press individually. In addition, the cylinder tube 101 is used for example for receiving sensors and as a mounting option for attachments.

The first piston 103 -1 has a first stroke and serves to move the piston rod 131 -1, which is movably guided in the bearing cap 121-1 and with the first piston 103 -1 is connected. The second piston 103 -2 has a second stroke and serves to move the first piston 103 -1 by means of the piston rod 131 -2, in the bearing cap 121 -2 is movably guided.

As a result, indirectly via a movement of the second piston 103-2, the piston rod 131 -1 of the first Kobens 103 -1 are moved. Through the interaction of the two pistons 103 -1 and 103-2 with the respective strokes can be three positions of the piston rod 131 -1 realize. Besides, the pistons have 103 -1 and 103-2 the task to convert a residual kinetic energy in the final position. This task is shared by the pistons with the bearing caps 121 -1 and 121-2 and the end cap 125 , In general, the number of pistons 103 in the cylinder tube 101 however, be arbitrary.

The bearing cap 121 -1 closes the cylinder tube 101 on one side and at the same time provides a bearing and sealing point for the piston rod 131 -1. The end cap 125 closes the cylinder tube 101 on the other hand.

Each of the pressure chambers 105 -1, ..., 105-4 has a respective inlet 123 -1, ..., 123-4. The inlet 123 -3 for the pressure chamber 105 -3 is formed by a recess in the bearing cap 121-2, via which the pressure medium from the channel 107 -3 in the pressure chamber 105 -3 can flow. The inlet 123 -4 for the pressure chamber 105 -4 is through a recess in the end cap 125 formed over which the pressure medium from the channel 107 -4 in the pressure chamber 105 -4 can flow. The inlets 123 However, -3 and 123-4 may also be at appropriate locations of the cylinder tube sleeve 119 -2 be provided.

The pressure medium connections 127 are above the respective channel 107 arranged so that, for example, by attaching a compressed air hose, the respective channel 107 can be applied with a pressure. For this purpose, the Pressure medium connections 127 a mechanical coupling interface.

2 shows a schematic second cross-sectional view of the multi-position cylinder 100 through the fluid ports 127-1 and 127-2. The inlet 123 -1 for the pressure chamber 105 -1 is through a recess in the bearing cap 121 -1 formed over which the pressure medium from the channel 107 -1 in the pressure chamber 105 -1 can flow. The inlet 123 -2 for the pressure chamber 105 -2 is formed by a recess in the bearing cap 121-2, via which the pressure medium from the channel 107 -2 in the pressure chamber 105 -2 can flow. The inlets 123 However, -1 and 123-2 may also be at appropriate locations of the cylinder tube sleeve 119 -1 be provided.

3 shows a schematic second cross-sectional view of the multi-position cylinder 100 through the two tension rods 129 , The tie rods 129 extend in the longitudinal direction of the multi-position cylinder 100 and are disposed inside the channels 107-5 and 107-6. The tie rods 129 each comprise a thread with a screw on the top and bottom 133 attached to the end cap 125 or the bearing cap 121 -1 is present.

Through the tie rods 129 Pressure is applied to the top and bottom of the multi-position cylinder 100 exercised, so that the individual components of the modular multi-position cylinder 100 and the cylinder tube 101 held together. In general, more than two tie rods can 129 used to fix the components.

Through the tie rods 129 become the bearing cap 121 -1, the cylinder tube sleeve 119 -1, the bearing cap 121 -1, the cylinder tube sleeve 119 -2 and the end cover 125 pressed together.

All features explained and shown in connection with individual embodiments of the invention may be provided in different combinations in the article according to the invention, in order to simultaneously realize their advantageous effects.

All method steps may be implemented by means suitable for carrying out the respective method step. All functions performed by objective features may be a method step of a method.

The scope of the present invention is given by the claims and is not limited by the features illustrated in the specification or shown in the figures.

LIST OF REFERENCE NUMBERS

100

Multi-position cylinder

101

cylinder tube

103

piston

105

pressure chamber

107

channel

109

wall

111

recess

113

Extruded

115

longitudinal projection

117

outer sleeve

119

Cylinder tube sleeve

121

bearing cap

123

inlet

125

End cover

127

Pressure medium connection

129

tension rod

131

piston rod

133

screw

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008007892 A1 [0002]

Claims (15)

Multi-position cylinder (100) with a cylinder tube (101), comprising: - a first piston (103-1) which is movable by a pressure medium in a first pressure chamber (105-1) in the cylinder tube (101); - A second piston (103-2) which is movable by a pressure medium in a second pressure chamber (105-3) in the cylinder tube (101); - A first channel (107-1) for supplying the pressure medium in the first pressure chamber (105-1); - a second channel for supplying the pressure medium into the second pressure chamber (105-3); characterized in that the first and the second channel (107-1, 107-3) extend parallel to each other in the axial direction in a wall (109) of the cylinder tube (101). Multi-position cylinder (100) after Claim 1 , wherein the first or the second channel (107-1, 107-3) are formed by a recess (111) of part-sector-section shape in the wall (109) of the cylinder tube (101). Multi-position cylinder (100) according to one of the preceding claims, wherein the cylinder tube (101) comprises an extruded profile (113). Multi-position cylinder (100) after Claim 3 wherein the extruded profile (113) comprises radially protruding longitudinal projections (115) forming walls of the first or second channel (107-1, 107-3). Multi-position cylinder (100) after Claim 3 or 4 wherein the cylinder tube (101) comprises a cylindrical outer sleeve (117) into which the extruded profile (113) is inserted. Multi-position cylinder (100) after Claim 5 wherein the outer sleeve (117) is formed of a plastic material. A multi-position cylinder (100) according to one of the preceding claims, wherein the cylinder tube (101) comprises a first cylinder tube sleeve (119-1) for the first pressure chamber (105-1) and a second cylinder tube sleeve (119-2) for the first pressure chamber (105-2 ). Multi-position cylinder (100) after Claim 7 , wherein on the first cylinder tube sleeve (119-1), a first bearing cap (121-1) for the first piston (103-1) is placed. Multi-position cylinder (100) after Claim 8 wherein the first bearing cap (121-1) comprises an inlet (123-1) for the first pressure chamber (105-1). Multi-position cylinder (100) after Claim 9 wherein between the first cylinder tube sleeve (119-1) and the second cylinder tube sleeve (119-2), a second bearing cap (121-2) for the second piston (103-2) is arranged. Multi-position cylinder (100) after Claim 10 wherein the second bearing cap (121-2) comprises an inlet (123-2) for the second pressure chamber (105-3). Multi-position cylinder (100) after Claim 11 , wherein on the second cylinder tube sleeve (119-1) a cover plate (125) is placed. Multi-position cylinder (100) after Claim 11 wherein the multi-position cylinder (100) comprises at least one tension rod (129) for holding together the multi-position cylinder (100) arranged in a channel (107-5, 107-6). Multi-position cylinder (100) according to one of the preceding claims, wherein a first pressure medium connection (127-1) for the first channel (107-1) or a second pressure medium connection (127-3) for the second channel (107-3) in a cover ( 125) are arranged. A multi-position cylinder (100) according to any one of the preceding claims, wherein the first piston (103-1) is movable by the second piston (103-2).

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