Clamping mechanism

Abstract

The invention relates to a clamping mechanism, comprising a base body, a first guide rod, a second guide rod, a transmission mechanism for synchronous, mutually opposite forced movements of the guide rods, and a first guide plate, which has a first guide opening for accommodating the first guide rod and a first abutment surface, which is fixed to a first end face of the base body by a first fixing device, wherein the guide rods are respectively assigned a clamping slide, and a drive mechanism for introducing a clamping movement onto the clamping slide. According to the invention, the base body and the first guide plate are configured in a release position of the first fixing device for limited relative movement in a movement plane oriented transversely to the movement axis and / or the first guide rod is directly slidably abutted against the inner surface of the first guide opening with its outer surface.

Description

Technical Field

[0001] The present invention relates to a clamping mechanism for clamping an object for a short time, the clamping mechanism having a base body, the base body being configured to accommodate a first guide rod and a second guide rod in a linearly movably manner and the base body being assigned a first guide plate, the first guide plate being configured to support the first guide rod in a linearly movably manner along a first movement axis, and the clamping mechanism having a first guide rod and a second guide rod, which are oriented parallel to each other and having a transmission mechanism assigned to the base body, the transmission mechanism being configured for synchronous, mutually opposite forced movements of the first guide rod and the second guide rod, wherein the first guide plate is passed through a first guide opening, wherein the first guide rod is slidably accommodated and comprises a first abutment surface, the first abutment surface abuts against a first end face of the base body and is fixed to the base body by a first fixing device, wherein the first guide rod is assigned a first clamping slide and wherein the second guide rod is assigned a second clamping slide, and having a drive mechanism for introducing a clamping movement into the clamping slide. Background Art

[0002] DE 9 214 477 U1 discloses a clamp for a robot, comprising an inseparable, one-piece housing having a cylinder space in its interior and at least two guide bolts, each of which is integrally connected to a compression piston, wherein each guide bolt is arranged in a sealed manner in a cylinder opening of the housing by means of a guide bearing and is correspondingly integrally connected to a toothed rack projection, each of which has a toothing on the end sides facing each other and a pinion with the two toothings is arranged between the two toothings, and the pinion is supported about a rotation axis running orthogonally to the longitudinal axis of the guide bolt, wherein the toothed rack projection is constructed as a guide portion extending the guide bolt. Summary of the invention

[0003] The object of the present invention is to provide a clamping device which combines improved clamping accuracy with reduced production costs.

[0004] This object is achieved for a clamping device of the type mentioned at the outset by means of the features of claim 1. It is provided that the base body and the first guide plate are designed in the release position of the first fixing means for a limited relative movement in a movement plane oriented transversely to the movement axis and / or that the first guide rod bears with its outer surface directly in a sliding manner against the inner surface of the first guide opening.

[0005] Preferably, the fixing means is configured to provide a normal force acting between the base body and the first guide plate so as to ensure a friction fit fixation of the first contact surface of the first guide plate at the first end surface of the base body. Exemplarily, the first fixing means is configured as a threaded fastener, which passes through a recess in the guide plate with a shank section and is screwed into a threaded opening in the base body. When the threaded fastener is tightened, a desired normal force component is applied by the guide plate to the base body, thereby ensuring a friction fit fixation of the first guide plate at the base body.

[0006] In order to adjust the relative position between the first guide plate and the base body, it is provided that the screw fastener is initially not completely tightened, so that initially no friction-fit connection is also produced between the first guide plate and the base body. More precisely, this achieves a limited relative mobility of the first guide plate relative to the base body in an XY plane oriented transversely to the first axis of movement. In this release position of the first fixing device, the relative mobility between the first guide plate and the base body is limited by way of example by the rod of the screw fastener and the gap in the guide plate through which the rod passes. This is coordinated with one another in such a way that the desired positioning of the first guide rod guided in the first guide plate relative to the base body is ensured.

[0007] In addition or alternatively, it is provided that the first guide rod is guided in the first guide plate in a direct manner, that is to say without the interposition of additional components such as, for example, sliding bearing bushings. By way of example, the first guide rod is designed with a cylindrical outer surface, which is accommodated in a first guide opening of the first guide plate, which is also designed cylindrically. It is preferably provided that the outer diameter of the first guide rod and the inner diameter of the first guide opening are designed as a slip fit, whereby precise, low-play and low-friction guidance of the guide rod by the guide plate is ensured.

[0008] Advantageous developments of the invention are the subject matter of the dependent claims.

[0009] It is expedient that the first contact surface of the first guide plate, the first end surface of the base body and the first fixing means are designed for free adjustability of the functional position of the first guide plate relative to the base body within an adjustment range determined by the guide plate and the fixing means. It is provided by way of example that the first contact surface of the first guide plate and the first end surface of the base body are designed at least in sections, in particular completely, as planes oriented parallel to one another. Preferably, these planes are oriented transversely to the first axis of movement. It is further provided that the relative movement of the first guide plate relative to the base body in the plane of movement is limited by the fixing means and the first guide plate passed through by the fixing means. It is provided in particular that the fixing means is adjusted in such a way that the relative movement of the first guide plate relative to the base body is achieved without the first guide plate moving in a noticeable manner along the axis of movement relative to the base body. By way of example, it can be provided that a first fixing device constructed as a threaded fastener is first tightened in such a way that a noticeable friction effect occurs between the first guide plate and the base body, so that the threaded fastener is then rotated slightly, for example by less than 360 degrees, and the reduction in friction effect that occurs here is used to adjust the relative position between the first guide plate and the base body and the threaded fastener is then tightened in order to effect the desired friction-fitting fixation of the first guide plate on the base body.

[0010] In a further development of the invention, it is provided that the base body is assigned a second guide plate for linearly movably supporting the second guide rod, wherein the second guide plate passes through a second guide opening, the second guide rod is slidably accommodated in the second guide opening and abuts with a second contact surface on a second end face of the base body and is fixed to the base body by a second fixing device, and wherein the base body and the second guide plate are designed for limited relative movement in a movement plane oriented transversely to the movement axis in the release position of the second fixing device. The second guide plate thus enables adjustment of the spatial position of the second guide rod relative to the base body in a manner similar to the first guide plate, so as to thereby ensure a linear movement of the second guide rod with little play and low friction.

[0011] In an advantageous development of the invention, it is provided that the second contact surface of the second guide plate, the second end surface of the base body and the second fixing means are configured for free adjustability of the functional position of the second guide plate relative to the base body within an adjustment range determined by the guide plate and the fixing means. Preferably, the second contact surface of the second guide plate, the second end surface of the base body and the second fixing means are implemented in the same way, in particular identically, as the first contact surface of the first guide plate, the first end surface of the base body and the first fixing means.

[0012] Preferably, the second guide rod is provided with an outer surface that is directly slidably abutted against the inner surface of the second guide opening, thereby ensuring a linear movement of the second guide rod with little clearance and low friction in a similar manner to the first guide rod and the first guide opening.

[0013] In an advantageous improvement of the invention, it is provided that at least one drive mechanism is accommodated in the base body, which comprises a working space in which a working piston is accommodated in a linearly movable manner, the working piston being assigned a piston rod which passes through the piston rod space of the first guide plate or the second guide plate and is fixed to the first clamping slide or the second clamping slide, wherein the piston rod is directly slidably abutted against the inner surface of the piston rod space with its outer surface. The working space constructed in the base body is divided into a first working chamber and a second working chamber by the working piston, wherein at least one of the working chambers is provided with a fluid connection in order to enable compressed air loading of the corresponding working chamber and thereby pressure loading of the working piston and axial displacement of the piston rod and the clamping slide connected thereto. Thus, the working space, the working piston and the piston rod form a fluid, in particular pneumatic, drive mechanism for introducing a clamping movement into the clamping slide.

[0014] In an advantageous improvement of the invention, it is provided that a first working gap is constructed in the base body parallel to the first guide rod, in which a first working piston is accommodated so as to be linearly movable, the first working piston comprising a first piston rod which passes through a first piston rod gap of a first guide plate and is fixed to a first clamping slide. In addition, a second working gap is constructed in the base body parallel to the second guide rod, in which a second working piston is accommodated so as to be linearly movable, the second working piston comprising a second piston rod which passes through a second piston rod gap of a second guide plate and is fixed to a second clamping slide. As a result, each of the clamping slides is assigned a dedicated fluid drive, whereby a high clamping force can be introduced into the object to be clamped.

[0015] Preferably, the relative position of the piston rod relative to the guide rod is determined solely by the associated recess in the guide plate. Conversely, it is provided that the piston rod and the guide rod are either accommodated with play or are at least partially freely adjustable relative to the clamping slide and the base body. This prevents manufacturing tolerances of the clamping slide and the base body from influencing the relative position of the piston rod and the guide rod relative to one another, thereby ensuring cost-effective production of the clamping mechanism.

[0016] In an advantageous development of the invention, it is provided that the relative spatial position of the piston rod relative to the first guide rod is determined by arranging the first guide opening and the piston rod recess in the first guide plate and / or the relative spatial position of the piston rod relative to the second guide rod is determined by arranging the second guide opening and the piston rod recess in the second guide plate. For low-friction and precise movement of the first guide rod and the associated piston rod for the movement of the first clamping slide or the second guide rod and the associated piston rod for the movement of the second clamping slide relative to the base body, a statically defined support of these components is advantageous. This is achieved in the case of the clamping mechanism according to the invention by inserting the corresponding guide opening and the corresponding piston rod recess into the corresponding guide plate with high precision relative to one another and by enabling the corresponding guide plate to be adjusted in its spatial position relative to the base body, in particular in an XY plane oriented transversely to the first axis of movement, in order to be able to compensate for tolerances of the base body and the drive mechanism constructed therein. By way of example, it can be provided that the guide plate and the clamping slide are manufactured from sections of an extruded profile, wherein the extruded profile is already provided with openings extending along the profile axis, which are further processed during the finish machining of the guide plate and the clamping slide and thus form a favorable basis for the desired precise orientation of the corresponding guide openings and piston rod recesses.

[0017] Preferably, a first guide recess is formed in the base body for linearly movably guiding the first guide rod and a second guide recess is formed for linearly movably guiding the second guide rod. Preferably, the first guide recess and the second guide recess are formed along the respective movement axis with a cross section which is selected to be larger than the cross section of the respective guide rod in a cross-sectional plane oriented transversely to the movement axis. As a result, the desired free adjustability of the respective guide rod relative to the base body is ensured.

[0018] In an advantageous development of the invention, it is provided that the first guide plate is manufactured from an aluminum alloy, the inner surface of the first guide opening is provided with an electrolytically deposited oxide layer, and the first guide rod is manufactured from a steel alloy, in particular a stainless steel alloy. The oxide layer applied to the aluminum alloy of the guide plate, in particular by means of electrolytic oxidation, forms in the guide opening a highly load-bearing friction pair with an outer surface of the first guide rod having a low coefficient of friction.

[0019] Advantageously, the first guide opening is designed as a cylindrical stepped opening, which has a guide section extending along the movement axis with a first inner diameter, which is matched to the outer diameter of the guide rod, and the stepped opening has a functional section adjacent thereto, which is designed with a second inner diameter, which is larger than the outer diameter of the guide rod. The functional section can be used, for example, to accommodate a seal, in particular a shaft sealing ring, which prevents dirt from penetrating from the surroundings of the clamping mechanism into the guide section. In addition or as an alternative, the functional section can be used as a lubricant reservoir, for example, for a grease reserve, which is used to permanently lubricate the friction pair between the guide rod and the guide section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] An advantageous embodiment of the invention is shown in the drawings.

[0021] Figure 1 A perspective illustration showing a clamping mechanism,

[0022] Figure 2 Show according to Figure 1 A diagram of a clamping mechanism cut in a first cross-sectional plane,

[0023] Figure 3 Show according to Figure 1 A cross-sectional illustration of the clamping mechanism of FIG. 1 in the second cutting plane,

[0024] Figure 4 A perspective illustration of a guide plate is shown. DETAILED DESCRIPTION

[0025] exist Figures 1 to 3 The clamping mechanism 1 shown in the figure can be used to clamp objects (not shown in more detail) for a short time. For this purpose, the clamping mechanism 1 can be arranged in particular in the hand region of a robot arm (not shown in more detail) or on a single-axis or multi-axis manipulator. By way of example, the clamping mechanism 1 is used to transport the clamped objects from a receiving position (not shown) to a delivery position (also not shown).

[0026] Purely by way of example, the clamping mechanism 1 comprises a base body 2, to which a first guide plate 3 and a second guide plate 4 are respectively fixed at the end side. Here, a first clamping slide 5 is arranged adjacent to the first guide plate 3, while a second clamping slide 6 is arranged adjacent to the second guide plate 4. In order to carry out the clamping process, the spacing 7 between the first clamping slide 5 and the second clamping slide 6 can be changed. It is usually provided that in order to carry out the clamping process, the spacing 7 between the clamping slides 5 and 6 is reduced and thus an object arranged between the first clamping slide 5 and the second clamping slide 6, which is not shown in more detail, is gripped in a force-fitting manner. Alternatively, it can also be provided that in order to carry out the clamping process, the spacing 7 between the first clamping slide 5 and the second clamping slide 6 is enlarged in order to be able to accommodate an object not shown at an inner contour which is also not shown.

[0027] For example, in order to clamp the relative movement of the slides 5 and 6 with respect to the base body 2, a Figure 3 The first drive 8 and the second drive 9 shown in greater detail in FIG. 1 are each designed to provide a linear movement along an associated first axis of movement 10 or second axis of movement 11 to the first clamping slide 5 or the second clamping slide 6 .

[0028] The following description applies in the same manner to the clamping slide 5 and the clamping slide 6, the explanation being made with reference to the clamping slide 5. Figure 1 As can be seen from the illustration of , a first fixing screw 15 and a second fixing screw 16 are arranged on the first clamping slide 5. For this purpose, the screw heads of the fixing screws 15, 16, which are not indicated in more detail, are respectively accommodated in a purely exemplary cylindrically designed sinking opening 17 or 18. In addition, the screw shafts of the respective fixing screws 15, 16, which are also not indicated in more detail, are accommodated in the associated through openings 19 or 20, which pass through the first clamping slide 5.

[0029] As from Figure 3 As can be seen from the illustration of , the first fixing screw 15 is screwed into the internal threaded opening 23 of the piston rod 24 and thereby ensures that the first clamping slide 5 is fixedly coupled to the piston rod 24 .

[0030] according to Figure 2 As shown in the illustration, the second fixing screw 16 is screwed into the internal threaded opening 21 of the guide rod 22 and thereby ensures that the first clamping slide 5 is fixedly coupled to the guide rod 22 .

[0031] Since the clamping mechanism 1 has two guide rods, which are technically identical, the first guide rod is subsequently designated with reference numeral 22 and the second guide rod is subsequently designated with reference numeral 52. The description of the installation of the two guide rods 22, 52 will be made only for the guide rod 22 and applies in the same manner to the guide rod 52.

[0032] By way of example, it is configured that the threaded fastener heads of the fixed threaded fasteners 15, 16, the countersunk openings 17, 18, the threaded fastener rods of the fixed threaded fasteners 15, 16 and the through openings 19, 20 are coordinated with each other as follows, so that before tightening the fixed threaded fasteners 15, 16, the relative positions of the guide rod 22 and the piston rod 24 relative to the first guide plate 3 can be adjusted in a movement plane oriented transversely to the first movement axis 10 for the purpose of tolerance compensation.

[0033] The guide rod 22 or 52 extends along the first movement axis 10 from the first clamping slide 5 through the first rod recess 63 or the second rod recess 64 into the base body 2 and passes through a free end region, which is not indicated in more detail, through a through opening 25 in the second clamping slide 6. The guide rod 22 is partially provided with a toothing 26, which engages in a gear 27, which is mounted on the base body 2 so as to be rotatable about an axis of rotation 28. Since the second clamping slide 6 is assigned the components 15, 16, 24 and 52 and the second guide rod 52 of the second clamping slide 6 is provided with a toothing 26, the gear 27 enables synchronization of the linear movements of the two guide rods 22, 52 and thus of the first clamping slide 5 and the second clamping slide 6.

[0034] exist Figure 3 The drives 8 and 9 shown in , for the first clamping slide 5 and for the second clamping slide 6 , are also designed identically, so that only the first drive 8 for driving the first clamping slide 5 will be described below.

[0035] In addition to the piston rod 24, the first drive mechanism 8 comprises a working piston 33 fixedly arranged on the piston rod 24, which can be fixedly coupled to the first clamping slide 5 by means of a fixing threaded fastener 16. The working piston 33 surrounds the piston rod 24 in an annular shape and is provided with a radially outer, annularly configured sealing mechanism 34. The sealing mechanism 34 is provided to seal against the inner surface 35 of the cylindrical working space 36 configured in the base body 2 and thereby realize the separation of the working space 36 into a first working chamber 37 of variable size and a second working chamber 38 of variable size.

[0036] Each of the two working chambers 37 and 38 can be charged with a pressure-loaded working fluid, in particular compressed air, in a manner not shown in greater detail, in order to bring about a pressure introduction acting along the axis of movement 10 onto the working piston 33. As a result, a movement of the working piston 33 and the piston rod 24 coupled thereto and the associated first clamping slide 5 along the first axis of movement 10 can be brought about.

[0037] By way of example, a sleeve-shaped end stop 39 is arranged in the first working chamber 37 coaxially to the piston rod 24 and serves to limit the movement of the working piston 33 , said end stop being produced, for example, from a rubber-elastic material.

[0038] As from Figure 2 As can be seen from the detailed illustration of FIG. 2 , the guide rod 22 with its cylindrical outer surface 29 directly bears against the likewise cylindrical inner surface 45 of the guide recess 46 formed in the first guide plate 3. By way of example, it is provided that the outer diameter of the guide rod 22 and the inner diameter of the guide recess 46 are matched to one another as a sliding fit, so that the guide rod 22 is guided precisely, in particular without play and with low friction, in the guide recess 46 of the first guide plate 3.

[0039] In the end region facing away from the base body 2, the guide recess 46 widens into a cylindrically designed sealing recess 47, in which a shaft sealing ring 48 is accommodated, which is designed to bear sealingly against the outer surface 29 of the guide rod 22. In order to ensure that the shaft sealing ring 48 is fixedly arranged in the sealing recess 47, the sealing recess 47 has a circumferential annular collar 49 at the end region facing away from the guide recess 46, which prevents an axial movement of the shaft sealing ring 48 along the axis of movement 11.

[0040] Adjoining the end region of the guide recess facing the base body 2 is an access opening 50 which has a slightly larger diameter than the guide recess 46 and is designed in particular for accommodating a lubricant reservoir (not shown in greater detail) for lubricating the guide rod 22 .

[0041] For guiding the piston rod 24, the first guide plate 3 is designed in the same way as for guiding the guide rod 22. The outer surface 30 of the piston rod 24 bears against the inner surface 55 of the guide recess 56 in the first guide plate 3. A sealing recess 57 is connected to the end region of the guide recess 56 facing away from the base body 2, which is designed to accommodate a shaft sealing ring 58, which bears against the outer surface 30 of the piston rod 24 in a sealing manner and whose axial mobility is limited by an annular flange 59. A lubricant reservoir (not shown) is configured in an access opening 60 connected to the guide recess 56 and facing the base body 2 for lubricating the piston rod 24.

[0042] The guide recess 46 and the guide recess 56 are designed with high precision with respect to their spatial orientation relative to one another, so that the guide rod 22 guided therein and the piston rod 24 guided therein also assume an orientation that is precisely predefined relative to one another. This applies both to the position tolerances of the first movement axis 10, which also serves as the center axis of the opening for the guide recess 46, relative to the second movement axis 11, which also serves as the center axis of the opening for the guide recess 56, and to the spacing between the two movement axes 10 and 11. In contrast, the guide rod 22 is accommodated with play in the base body 2, and the same also applies to the piston rod 24 due to the elasticity of the seal 34 on the working piston 33, so that statically indeterminate support of the guide rod 22 and the piston rod 24 is avoided.

[0043] In order to achieve a favorable orientation of the guide rod 22 and the piston rod 24 relative to the base body 2, which are in a clearly defined spatial relationship relative to each other by means of the first guide plate 3, it is provided that the first guide plate 3 rests with a first flat contact surface 12 on the first end surface 14 of the base body 2 which is opposite thereto and is also flat. Figure 2 and 3 Move in the XY plane 65.

[0044] The first guide plate 3 is fixed to the base body 2 by means of fixing screws 66, 67, which can be passed through the associated recesses 70, 71 in the first guide plate 3 with a screw shaft 68 or 69 and can be screwed with a threaded section (not shown in more detail) into an internally threaded opening 72, 73 of the base body 2. In this case, the force transmission proceeds from the screw heads 74, 75 of the fixing screws 66, 67, which are in contact with the annular end faces 76, 77 of the associated screw recesses 78, 79 in the first guide plate 3, through the screw shafts 68, 69 into the internally threaded openings 72, 73 of the base body 2 and from there to the first guide plate 3.

[0045] Here, the diameters of the threaded fastener heads 74, 75, the diameters of the threaded fastener recesses 78, 79, the diameters of the threaded fastener rods 68, 69 and the diameters of the recesses 70, 71 are coordinated with one another in such a way that a relative movement of the first guide plate 3 relative to the base body 2 in the XY plane 65 is possible even when the fixing threaded fasteners 66, 67 are screwed into the associated recesses 70, 71 and only the corresponding fixing threaded fasteners 66, 67 are required to be rotated a maximum of 360 degrees in order to fix the first guide plate 3 frictionally to the base body 2 for the functional preparation (Funktionsbereitschaft) of the clamping mechanism 1.

[0046] By means of this possible solution for moving the first guide plate 3 relative to the base body 2, it is possible to ensure the desired matching of the spatial positions of the guide rod 22 and the piston rod 24 (which are directly supported in the first guide plate 3 and in a defined orientation relative to each other) relative to the base body 2, so as to ensure within the clamping mechanism 1 the linear mobility of the guide rod 22 and the piston rod 24 together with the working piston 33 mounted thereon, on the one hand with little clearance and on the other hand with low friction.

[0047] The second guide plate 4 is fastened to the base body 2 in the same manner as the first guide plate 3 , so that a description thereof is unnecessary.

[0048] from Figure 4 It can be seen from the illustration that the first guide plate 3 is provided purely by way of example on the first substantially flat contact surface 12 with two centering sleeves 31 , 32 which protrude from the first contact surface 12 along the movement axes 10 , 11 in the direction of the base body 2 . Figure 3 , the first centering sleeve 31 is penetrated by a receiving opening 42 designed as a blind hole, which is designed to accommodate the end region of the piston rod 24 facing away from the first clamping slide 5. The second centering sleeve 32 is penetrated by a guide gap 56, which is designed to guide the piston rod 24 connected to the second clamping slide 6. Preferably, the outer diameter of the centering sleeves 31, 32 is smaller than the associated sleeve gaps 43, 44 in the base body, so as not to restrict the relative mobility of the first guide plate 3 with respect to the base body 2. The sealing of the respective centering sleeves 31, 32 with respect to the end face 14 of the base body 2 is carried out by the associated sealing rings 80, 81, which are accommodated in sections in annular grooves 82, 83, which are inserted into the contact surface 12 coaxially with respect to the respective centering sleeves 31, 32. As a result, a sealing effect for the respective working gap 36 is ensured independently of the relative position of the first guide plate 3 with respect to the base body 2.

Claims

1. A clamping mechanism for briefly clamping an object, the clamping mechanism comprising a base body (2), the base body being configured to accommodate a first guide rod (22) and a second guide rod (52) in a linearly movable manner, and the base body being assigned a first guide plate (3), the first guide plate being configured to support the first guide rod (22) in a linearly movable manner along a first movement axis (10), and the clamping mechanism comprising a first guide rod (22) and a second guide rod (52), which are oriented parallel to each other, and a transmission mechanism (27) assigned to the base body (2), the transmission mechanism being configured for synchronous, mutually opposite forced movements of the first guide rod (22) and the second guide rod (52), wherein: The first guide plate (3) passes through a first guide opening, in which the first guide rod (22) is slidably accommodated, and comprises a first abutment surface (12), the first abutment surface abuts against a first end surface (14) of the base body (2) and is fixed to the base body (2) by a first fixing device, wherein the first guide rod (22) is equipped with a first clamping slide (5), and wherein the second guide rod (52) is equipped with a second clamping slide (6), and has a drive mechanism (8, 9) for introducing a clamping movement into the first clamping slide (5) and the second clamping slide On a slide block (6), characterized in that the base body (2) and the first guide plate (3) are constructed in the release position of the first fixing device for limited relative movement in a movement plane (65) oriented transversely to the first movement axis (10) and the first guide rod (22) is directly slidably abutted against the inner surface (45) of the first guide opening with its outer surface (29), wherein the first guide rod is guided in the first guide plate without any additional components connected in the middle, and wherein the outer diameter of the first guide rod and the inner diameter of the first guide opening are constructed as a sliding fit.

2. The clamping mechanism according to claim 1, characterized in that: The first abutment surface (12) of the first guide plate (3), the first end surface (14) of the base body (2) and the first fixing device are configured to allow free adjustability of the functional position of the first guide plate (3) relative to the base body (2) within an adjustment range determined by the first guide plate (3) and by the first fixing device.

3. The clamping mechanism according to claim 1 or 2, characterized in that: The base body (2) is equipped with a second guide plate (4) for supporting the second guide rod (52) in a linearly movable manner, wherein the second guide plate (4) passes through a second guide opening, in which the second guide rod (52) is slidably accommodated, and abuts against a second end face of the base body (2) with a second abutment surface and is fixed to the base body (2) with a second fixing device, and wherein the base body (2) and the second guide plate (4) are configured in the release position of the second fixing device for limited relative movement in a movement plane (65) oriented transversely to the first movement axis (10).

4. The clamping mechanism according to claim 3, characterized in that: The second abutment surface of the second guide plate (4), the second end surface of the base body (2) and the second fixing device are configured to ensure free adjustability of the functional position of the second guide plate (4) relative to the base body (2) within an adjustment range determined by the second guide plate (4) and the second fixing device.

5. The clamping mechanism according to claim 3, characterized in that: The second guide rod (52) is slidably abutted directly against the inner surface (45) of the second guide opening with its outer surface (29).

6. The clamping mechanism according to claim 3, characterized in that: At least one drive mechanism is accommodated in the base body (2), which includes a working gap (36) in which a working piston (33) is linearly movably accommodated, the working piston being assigned a piston rod (24), the piston rod passing through a piston rod gap (56) of the first guide plate (3) or the second guide plate (4) and being fixed to the first clamping slide (5) or the second clamping slide (6), wherein the piston rod (24) is slidably movably abutted directly with its outer surface (30) against an inner surface (55) of the piston rod gap (56).

7. The clamping mechanism according to claim 6, characterized in that: The relative spatial position of the piston rod (24) relative to the first guide rod (22) is determined by arranging the first guide opening and the piston rod gap (56) in the first guide plate (3) and / or the relative spatial position of the piston rod (24) relative to the second guide rod (52) is determined by arranging the second guide opening and the piston rod gap (56) in the second guide plate (4).

8. The clamping mechanism according to claim 1 or 2, characterized in that: A first rod recess (63) for linearly movably guiding the first guide rod (22) and a second rod recess (64) for linearly movably guiding the second guide rod (52) are formed in the base body (2).

9. The clamping mechanism according to claim 1 or 2, characterized in that: The first guide plate (3) is manufactured from an aluminum alloy and the inner surface (45) of the first guide opening is provided with an electrolytically deposited oxide layer and the first guide rod (22) is manufactured from a steel alloy.

10. The clamping mechanism according to claim 1 or 2, characterized in that: The first guide opening is constructed as a cylindrical stepped opening, which has a guide section extending along the first movement axis (10) with a first inner diameter, the first inner diameter matching the outer diameter of the first guide rod (22), and has a functional section (47, 50) adjacent thereto, the functional section being constructed with a second inner diameter, the second inner diameter being larger than the outer diameter of the first guide rod (22).

11. The clamping mechanism according to claim 9, characterized in that: The first guide rod (22) is made of a stainless steel alloy.

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