EP1197319B1 - Wedge drive - Google Patents

Abstract

Key comprises an upper guide part containing a sliding element (20) and a sliding guide element (10) held together by at least one guide clip (30) and a lower guide part containing a driving element. An Independent claim is also included for a method for reproducible adjustment of a key in a tool. Preferred Features: At least one guide clip connects the sliding element and the sliding guide element. The guide clip engages in a form-locking manner in the sliding guide element and/or the sliding element.

Description

The invention relates to a wedge drive with an upper guide part, comprising a slider element and a slider guide element, and a lower guide part, comprising a driver element.

Such wedge drives are known. They are used in particular in tools in metalworking, for example in presses. Connected with the wedge drives are usually the punching or otherwise deforming enabling facilities. The wedge drives are moved by the slider guide element by a drive applying a generally vertical pressing force. On the part of the driver element, the wedge drives are mounted in the tool or the press on a base plate on which the workpiece to be machined is placed directly or via a corresponding support device. For example, from DE-197 53 549 C2 such a wedge drive for deflecting a vertical pressing force, which has a driver element with a prismatic surface. The flanks of the prismatic surface are hereby sloping downwards. In addition, forced return brackets are disposed on two opposite sides in respective grooves of the slider element and the driver element. In this way, in the event of breakage of a spring member retrieving the slider element into its starting position, a return of the slider element is ensured in the event of a spring break, in order thereby to prevent tearing out of screwed-on punching elements. The slider element is attached to the slider guide member via angle brackets and retaining screws and can be moved along the angle strips with respect to the slider guide element.

Another wedge drive emerges from US Pat. No. 5,101,705, in which, however, the slider element likewise hangs on angle strips or by means of which it is fastened to the slider guide element. It is necessary that the adjacent plates or elements required for fastening are precisely ground to guarantee the required clearance between slide element and slide guide element. In the disclosed in this document wedge drive and in the other known wedge drives in which slide guide element and slide element are connected to each other via angle strips and screws, it proves to be disadvantageous that all tensile forces are introduced into the screws, which in particular at the moment, in an expansion of the screws or the surrounding material takes place, the running clearance of the mutually moving slider guide elements and slide elements is impaired. This subsequently leads to a poorer stability, since the wear is particularly increased due to the bracing of the tool in this area. In addition, it proves to be disadvantageous that the slider element when heated can not expand laterally, since it is narrowed by the angle strips in this regard. This can also lead to increased wear of the tool or at worst to such a reduced running clearance that moving the slider element and slider guide element against each other is almost impossible.

JP 7-290168 discloses a wedge drive with an upper part, a holding device connected thereto, a slider connected thereto and a driver connected thereto. The slider and the driver are connected to each other via two brackets. The upper part is also connected to the driver via a clamp.

The US 5,904,064 discloses a wedge drive with a holding device, comprising two guide springs, a slider and a driver, wherein slide and driver are connected to each other via two brackets. The present invention is therefore based on the object to remedy these disadvantages and to provide a wedge drive, whose service life is considerably higher than in the wedge drives of the prior art and in the possible no impairment of the running play can occur.

The object is achieved for a wedge drive according to the preamble of claim 1, characterized in that the upper guide member is held together by at least one guide bracket and / or held together. Further developments of the invention are defined in the dependent claims.

As a result, a wedge drive is created in which, in particular, slide element and slide guide element are held together by means of at least one guide clip. As a result, it is not necessary to exactly grind additional angle strips or other devices connecting these two elements in order to guarantee a required running play. In addition, the running clearance is not affected even when heating the wedge drive or the tool, since not only manufacturing tolerances, but also occurring expansions of the material can be absorbed by the connection via a guide bracket. The stability of the wedge drive is therefore no longer impaired or shortened. Despite the omission of a grinding in a high running accuracy can be achieved. In addition, the cost of the wedge drive can be significantly reduced, since not only a lower material cost, but also less effort in the assembly of slide guide element, slide element and driver element is required.

Preferably, the guide bracket or the guide brackets are positively engaged in the slider guide element or engages / engage there positively. The slider element thus depends on the guide brackets on the slider guide element via this positive engagement. Thus, it is no longer necessary to provide a stop on the slider guide element via screws, which are on the one hand wear prone and on the other hand one already mentioned impairment of the running clearance when heated can cause. As a result, advantageously considerably higher holding forces between the slide element and slide guide element can be achieved than is possible in the prior art. In addition, the service life of the wedge drive can be increased many times.

Preferably, the at least one guide clip on holding projections, by means of which it engages in a part of the slider guide element, wherein the holding projections have a chamfer. The retaining projections may for example be formed nose-shaped on a substantially flat body of the guide clip. In another preferred embodiment, they are formed as in the longitudinal direction of the guide bracket directed, projecting from the flat body of the clip wedges. Particularly preferably, the holding projections have a slight chamfer, in particular a chamfer of about 1 ° in the direction of the driver element. This chamfer is preferably provided only on one side of the retaining projections and makes it possible to move the at least one guide bracket in the stroke direction of the wedge drive linear and parallel. As a result, preferably a linear adjustment of the guide clearance and / or a setting of the sliding clearance between the upper and lower guide part by the guide bracket or guide brackets allows. Particularly preferred guide clip and upper guide part are so intermeshable that a linear displacement of the guide bracket in the stroke direction of the wedge drive leads to a change of the guide clearance transverse to the effective direction of the driver element at substantially constant linearity of the guide game. It thus changes by the linear displacement or displacement of the guide bracket in the stroke direction of the wedge drive, the guide play transverse to the direction of action of the driver element, due to the low chamfer of 1 ° in particular, without changing the leadership game in its linearity. Advantageously, can be counteracted by the ability to achieve a linear adjustment of the guide game, a wear occurring in continuous operation quickly and thus cost.

Each item produced on the tool generally has its own tolerance field, wherein the slider guide element in this area to achieve the required running accuracy may only have a sliding clearance of in particular 0.02 mm. To achieve this is very complicated and costly with the wedge drives of the prior art, in which a screwing of slide element and slide guide element is provided, since continuous rework, coupled with permanent installation and removal is required. In the advantageous use of a guide bracket can be advantageously changed by their mere parallel sliding the sliding clearance, whereby the individual previously required operations are unnecessary, namely the measurement and grinding of the individual elements of the wedge drive. Manufacturing tolerances can thus be compensated advantageous, resulting in significantly lower production costs of the items to be manufactured.

Preferably, slide element and slide guide element have essentially the same width. In addition, they preferably have substantially parallel surfaces on which the at least one guide clip can be fastened. This proves to be advantageous since a wedge drive should be performed not only in the region of its lower guide part with a constant sliding clearance of eg 0.02 mm, but also towards the sides, which proves to be very expensive with the wedge drives of the prior art , By Provision of guide clips in conjunction with slide element and slide guide element of substantially the same width can be omitted on the one hand a complex grinding of the abutting or -liding surfaces. On the other hand, it is completely irrelevant how large the actual width of the slide element and slide guide element is, as long as both elements are only substantially the same width. To achieve the required running clearance or sliding clearance only two, namely the two opposing parallel surfaces are provided, on which the guide bracket is attached. As a result, an adjustment of the two elements is achieved due to the abutment of the substantially flat body of the guide clip on the outer surfaces of the slide element and slide guide element, which in turn leads to the desired running accuracy, even in the case in which either the guide clip or slide element or slide guide element against Replacement part to be replaced or replaced. In this way, on the one hand, a cost-effective production and, on the other hand, a likewise cost-effective operation of the wedge drive can be achieved.

Preferably, the lower and / or upper guide part has a prismatic part and / or at least one prismatic surface for guiding the slider element and / or for receiving lateral forces for generating a high running accuracy. Since preferably the working surface of the wedge drive extends over the entire width of the wedge drive, the prismatic part and / or the prismatic surface can advantageously be provided in the lower guide part for driving and / or for guiding the upper guide part. The larger the prismatic part / prismatic surface, the easier and thus better the upper guide part can be thereon or, in particular, the slider element be driven and guided on the driver element. The slider guide element and / or slide element can also have prismatic surfaces, in particular surfaces sliding on one another or surfaces which can be joined to one another. Preferably, the prismatic part / the prismatic surface is dimensioned depending on the dimensions, in particular the width and the other design of the slide element. In this case, the wedge drive preferably has a uniform width over its entire width extension. It is thus possible to ideally dimension the prismatic part / prismatic surface with respect to the width of the slider element, which exerts a tremendous influence on the running and service life of the wedge drive. A driver element or slider guide element or slider element with a particularly large prismatic surface or a particularly large prismatic part is advantageously able to absorb larger compressive forces in the vertical direction, better intercept lateral shear forces on its V-shape and thus increase the running accuracy. Increased running accuracy in conjunction with greater compressive forces is a goal of a wedge drive. In addition, by providing prismatic surfaces, better steady adjustment can be made. The actual width of the wedge drive has an influence on the degree of stability of the driver element. It can be achieved by the use of the prismatic part / the prismatic surface thus a further improvement of the running and service life of the wedge drive, in particular the achieved by the use of the guide clips compactness of slide guide element and slide element can be used even better for the effective processing of a workpiece ,

Preferably, a spring element, in particular a gas spring, is provided for retrieving the slider element, which is secured by means of a securing element, in particular a locking screw, in the slide element and disassembled above it. By using two guide clips, a compact design of the wedge drive can be made possible. This in turn makes it possible to effortlessly replace a gas spring used to retrieve the slider element or another spring element in the installed state and, without causing a complete disassembly of the wedge drive. In particular, since a gas spring, but also other spring elements as wear parts frequently during the operation of a press, a punching tool or other tool in which the wedge drive is installed, must be replaced, this easy assembly and disassembly proves to be particularly advantageous because not now more a complete expansion of the wedge drive from the tool and a subsequent disassembly of the wedge drive is required. Particularly advantageously, a locking screw can be loosened and removed, whereupon the spring element can likewise preferably be dismantled in this direction. On the other hand, advantageously no further security measures to secure the spring element in the wedge drive are required, except for the provision of the locking screw. This saves not only material costs and effort in the production, but also leads to an even more compact design of the wedge drive.

Preferably, the individual successive sliding elements of the wedge drive consist of a combination of materials bronze and hardened steel, in particular in combination with a lubricant, in particular a solid lubricant. In this case, the wear parts, which are in any case more frequently to be changed, are preferably made of soft bronze, which wears faster than, for example, hardened steel. This will take place in the actual wedge drive, ie the elements slide guide element, Slider element and driver element over a long time essentially no wear instead. Only the parts provided on the sliding surfaces, such as sliding plates, etc., need to be exchanged. By adjusting the guide clamps, sliding play can be compensated for again. In this way, no expensive grinding in of the wear parts to be renewed is particularly advantageously required. This circumstance is of extreme importance especially for the service life, since a wedge drive is usually loaded or operated with extremely high compressive forces and thus the sliding surfaces or sliding plates are exposed to high wear.

Forced return means for preventing the application of lateral moments to the wedge drive between the driver element and the slide element are preferably provided. In this case, the slider element is particularly preferably so connected to the driver element slidably connected or connected, that a lifting of the prismatic part / the prismatic surface of the driver element is made possible substantially only in the starting position. The provision of two mutually oppositely arranged forced return devices, which are designed in particular as clamps between the slide element and the driver element, makes it possible to ensure a smooth further operation even when a jamming or arresting of the wedge drive occurs without lateral moments acting on the wedge drive. Especially with automatic production, stroke rates of 13 to 25 strokes / min. Therefore, a temporary disturbance by persistence or jamming of the wedge drive would become a costly problem. Characterized in that the slider element is inserted on the driver element, that the slider element initially a working path to the starting position must travel before it can be lifted from the prismatic surface, it is avoided that the slide element can be pulled in the forward operating position of the driver element up, which would generally lead to breakage of the deforming device, in particular a punch. The forced return means may be formed like a clip and engage in a corresponding guide slot of the driver element, wherein it preferably engages in the slider element in a groove or a similar recess or recess. In order to exclude the occurrence of unilateral moments, the wedge drive in the relevant area, in particular that of the slide element and driver element, is preferably provided on both sides with forced return devices.

Preferably, a fixed surface for generating a reproducible starting position of the wedge drive between slide guide element and slide element is provided. For reproducible adjustment of the wedge drive, which has an inclined surface, which is reciprocated over two more oblique sliding surfaces, in a tool, the inclined fixed surface between the wedge drive and its receiving element can be selected as an adjustment, a spacer whose dimensions the desired Distance between a standing at a fixed angle to the inclined surface oblique surface of the wedge drive and the Justierfläche correspond to be placed on the Justierfläche, and fixed the wedge drive in this position or fixed in the tool. Such a fixed surface may be an inner surface of the slide guide element, to which the spacer can be fitted and slide element can be moved counter with spring element. Preferably, the adjustment surface initially serves as a reproducible fixed surface during initial assembly in the tool. However, the fixed surface also proves to be particularly advantageous constantly checking and possibly changing the position of the wedge drive. This may be necessary in particular when the wedge drive is continuously moved back and forth during operation, in particular when the wedge drive moves a punch or a forming jaw, since the wedge drive is then always returned to a reproducible point or a reproducible surface and adjusted can be. As a result, therefore, a reproducible starting position is created. This leads to a considerable workload compared to the adjustment of a wedge drive, as described in the prior art. The required assembly times for adjusting and mounting the wedge drive can be shortened by using this method by about 80%, which also represents a significant amount of cost reduction. A further adjustment of the slide element and slide guide element with each other need not take place, since when using the guide brackets according to the invention, these two elements are already adjusted by the use of each other. It thus occurs here also no additional adjustment effort when using the guide brackets.

Figur 1

eine Draufsicht auf den erfindungsgemäßen Keiltrieb mit zwei Führungsklammern,

Figur 2

eine Schnittansicht durch den Keiltrieb gemäß Figur 1, worin das Schieberelement auf dem Treiberelement in die Arbeitsposition verfahren ist,

Figur 3

eine Schnittansicht des Keilantriebs gemäß Figur 2, worin das Schieberelement auf dem Treiberelement in der Ausgangsposition ruht,

Figur 4

ein Ablaufdiagramm der Verfahrwegsverhältnisse bei der Bewegung von Schieberführungselement, Schieberelement und Treiberelement gemäß Figur 2 und 3,

Figur 5

eine Schnittansicht durch Schieberelement und Treiberelement mit Zwangsrückholeinrichtungen, und

Figur 6

eine Draufsicht auf Schieberführungselement, teilweise geschnitten, und Treiberelement.

For a more detailed explanation of the invention will be described in more detail in the following embodiments with reference to the drawings. These show in:

FIG. 1

a plan view of the wedge drive according to the invention with two guide brackets,

FIG. 2

3 shows a sectional view through the wedge drive according to FIG. 1, in which the slide element on the drive element is moved to the working position,

FIG. 3

2 is a sectional view of the wedge drive according to FIG. 2, wherein the slider element rests on the driver element in the starting position,

FIG. 4

2 is a flowchart of the movement path ratios during the movement of slide guide element, slide element and driver element according to FIGS. 2 and 3,

FIG. 5

a sectional view through slider element and drive element with forced return means, and

FIG. 6

a plan view of slider guide element, partially cut, and driver element.

FIG. 1 shows a plan view of a first embodiment of a wedge drive 1 according to the invention. It has a slide guide element 10 and a slide element 20, which are connected to one another by two guide clips 30. For displacing the slide element relative to the slide guide element, a spring element 50 is also provided. The spring element 50 is embedded in the slide element and in particular a gas pressure spring. This is supported, as can be better seen in Figures 2 and 3, on the one hand on the slider guide element 10 and on the other side of the slider element 20 from.

The guide brackets 30 each have retaining projections 31. The holding projections 31 are provided with a respective chamfer 32, which is directed towards the driver element, which can be better seen in Figure 2. The bevel is directed in particular at an angle of 1 ° to the driver element. This leads to a secure even with material expansion stop on slide guide element and slide element, a constant running play or sliding clearance and thus the possibility of a constant linear parallel displacement of the guide brackets on slider guide element and slider element to compensate for wear and other occurring tolerances. The retaining projections 31 engage in corresponding grooves 11, 21 of slide guide element and slide element, whereby the guide brackets are positively seated in at least the groove 11 of the slide guide element in the stapling direction. For further attachment of the guide brackets on the slide guide element, these are connected to each other by screws 33. These can also be replaced by other fasteners or completely eliminated. Preferably, they allow the movement of the guide brackets for their adjustment, as Figure 2 can be better removed.

In order to ensure a better sliding slide element and slide guide element to each other, a sliding plate 12 is inserted between the two elements, which is fastened by means of screws 13 to the slide guide element. Slide guide element and slide element have in the region of the guide brackets 30 has a substantially equal width, whereby this can lie flat against the outer surfaces of slide guide element and slide element. Also in the area outside of the grooves 11, 21 have slider guide element, slide element and the outer surfaces of the guide brackets on a substantially equal width or form a substantially flat surface. By mounting the two guide brackets on the opposing parallel outer surfaces of slide guide element and slide element even a very low sliding clearance or running play of slide guide element and slide element can be achieved against each other, in particular a sliding clearance of 0.02 mm. This is particularly apparent from Figure 2. This figure shows a sectional view through the wedge drive 1, wherein, in contrast to the illustration in Figure 1, the driver element 40 is shown. In this respect, FIG. 1 represents a plan view corresponding to the arrow X. In the illustration according to FIG 2, the wedge drive is shown in the working position. Here, the slider element, which has an inclined surface 23, along which it bears against the slide plate 12, which is also arranged obliquely in space, moved along the driver element 40 in the working position. In this example, a punching or deformation of a workpiece can be performed, for which purpose on the side 22 of the slider element 20, a corresponding additional device is attached. The side 22 and the inclined surface 23, against which the spring element 50 abuts, form an angle α, which can assume, for example, a value of 40 °. This angle is chosen as a function of the applied pressing force and in dependence on the angle to the connecting surface to the driver element. It can therefore also assume a value deviating from α = 40 °.

The obliquely arranged spring element 50 is supported on a slide plate 12 substantially perpendicular to the inner surface 14 of the slide guide element 10 and is mounted on the opposite side via a bearing plate 51 and a bearing member 52 mounted thereon, which is screwed into the slide element in the slide member 20 , The spring element serves to retract the slide element back into the starting position, which is shown in FIG. A return force can be, for example, 800 Newton, wherein the pressing force which is exerted on the slider guide element on the slider element, can be 3 tons. This pressing force is introduced by a corresponding drive device, which is not shown in Figure 2, on the upper side 15 of the slide guide element. For this purpose, a recess 16 and two outer through holes 17 are provided there. This can be seen from the top view in FIG. By providing a connection of slide guide element and slider element by means of the guide brackets 30 and the consequent advantage of the ability to provide a narrower upper guide member containing the slider guide member and the slider element, even larger forces can be deflected. For example, with a width of the upper guide part 10, 20 of 80 mm, a pressing force of 20 t to 26 t can be deflected, whereas in the prior art with a width of 140 mm only a deflection of 3 t is possible. In addition, the upper guide member may only have a width of 50 mm, for example, to be able to be integrated into a system in which little space for the wedge drive is available. This is not possible with the wedge drives of the prior art, since these are provided with space-intensive screw connections, which require a certain minimum width of the wedge drive.

For an exchange of the spring element, only the bearing plate 51 has to be loosened by loosening the screw 53 provided thereon and the spring element removed. This preferably takes place from the direction X, which is indicated in FIG. In the same direction, a new spring element can be used and secured by the bearing plate with the screw 53 again in the slider element.

FIGS. 2 and 3 show the driver element 40, along the surface of which the slider element is displaced. In order to secure both elements together, in particular to prevent an impact of lateral moments on the entire wedge drive in this area, forced return means 60 are provided on both sides. The forced return means, as they can be better seen in Figure 5, are clip-like and engage both in the slider element and in the driver element with corresponding ones Retaining projections 61 a. With the slider element they are firmly connected by screws 62. In the driver element, a drive gate 41 is formed, along which the lower holding projection 61 of the respective positive-return device 60 is displaced by the movement of the slide element. A lifting of the upper guide member consisting of slide guide element and slide element of the lower guide member, the driver element 40 is therefore only in the starting position, namely the position of the slide element shown in Figure 3 possible. In this case, the lower holding projection of the forced return device 60 has left the travel gate 41, which is why a lifting of the upper guide part of the lower guide member is made possible in this position. This advantageously prevents damage to a deforming or punching device mounted on the side 22 of the slide element which, in the working position, has been retracted into a workpiece for its processing and could be destroyed in this position while leaving the possibility of a direct decrease. The removal of the upper guide part is required, for example, in the event of a fault in order to be able to remedy this as quickly as possible.

In order to subsequently achieve an exact positioning and adjustment within the tool after such a possible removal of the upper guide part of the lower guide member, a fixed surface 2 is preferably defined in the tool, based on which an adjustment of the wedge drive in the initial assembly as well as later on and Removals can be done. Both in Figure 2 and in Figure 3, this fixed surface 2 and further lines are indicated, which are arranged parallel to further slopes, horizontal and vertical surfaces of the upper and lower guide part of the wedge drive. The fixed surface 2 is preferably on the Stop surface of the spring element or the slider element. It can in principle also lie on the opposite side of the spring element in the slider guide element 10, but then serves the end of the spring element as abschlagendes part, not the slider element 20 itself. The base 42 of the driver element is not displaced during operation in height. As can be seen from the comparison of FIGS. 2 and 3, however, the slider guide element is displaced with respect to its vertical position relative to the horizontal line 3 during operation. The side 22 of the slider element only changes its distance from the vertical line 4 during operation. In addition, a line 5 parallel to the inclined surface 23 is formed. The distance of the surface 23 to the line 5 preferably does not change during operation. All lines 3, 4, 5 meet in a so-called tooling point 6, which is a standardization part. For the first time adjustment of the wedge drive, a spacer not shown in FIGS. 2 and 3 is used, which has parallel walls whose spacing corresponds to the distance between an adjusting or fixed surface 2 and the outer surface 18 of the slider element 20 in the starting position. The spacer is applied to the inclined fixed surface 2 with respect to the outer surface 18 and makes it possible to adjust the wedge drive in this position, ie parallel to the fixed surface 2. Precisely because of the height of the forces to be deflected by the wedge drive, an accurate adjustment should take place here.

The travel paths, which are covered during the deflection of the forces of the individual components of the wedge drive, are shown in Figure 4. Here, the length a is the travel by which the slider guide element and slide element are displaced from each other, the length b the travel path by which the force exerted on the slide guide element Pressing force vertically displaces this in height and the length c to the travel, by which the slide element is then moved along the driver element. The travel lengths a, b, c can be chosen arbitrarily, which in particular may result in a different aspect ratio with each other in comparison to the one shown.

The above-mentioned Figure 5 shows a plan view of the slider element and a part of the driver element in the direction of the arrow Y in Figure 2. As already mentioned, slider element and driver element are connected by the positive feedback means 60. In addition, the slider element runs on a prismatic part 43 of the driver element. On this prismatic part 43 sliding plates 24 are fitted to produce better sliding properties, which are mounted on the underside of the slider element 20. The two sliding plates 24 are supported on the two flanks 44 of the prismatic part 43. The two flanks 44 are arranged at a relatively shallow angle to each other, so that there is a relatively large width of the tread. As a result, an accurate guidance of the slider element on the driver element can be achieved. Since the driver element in the illustrated case is narrower than the slide element, but this has substantially the same width as the slide guide element, and the slider element sits symmetrically on the driver element or its prismatic part, there are no shifts in the force ratio on the two flanks 44th on, so that also here a very good smooth running characteristic can be achieved. Lateral shear forces can also be very well absorbed and larger pressing forces are absorbed very well in the vertical direction. Due to the provision of the two guide clips on both sides of slide guide element and slide element and the spring element centered in the body of the slide element, the pressing forces introduced into the slide guide element can be distributed uniformly over the entire wedge drive, so that the running accuracy and smoothness when moving the slide element on the prismatic part of the driver element can be optimized.

Since just acting on the wedge drive side forces obstruct the displacement or at least can worsen, the fixed surface 2 and / or the opposite surface 19 are formed as a prism in another embodiment. Such a prism can absorb particularly well even higher forces. In addition, the other sliding surfaces, in particular sliding surface 18 and surface 23, may also have prismatic shape.

Any impression of the proportions of slider guide element and driver element can be seen from the sectional top view in FIG. Here, in the upper part of the slider guide element and in the lower part, the top view of the driver element to see. The indicated in this figure section A-A is shown in Figures 2 and 3.

The successive surfaces are preferably made of a combination of materials of a hard and a soft material, in particular a combination of soft bronze and hardened steel, preferably between both surfaces a lubricant, in particular a grease or solid lubricant is used, in particular oil and graphite. Since the wear parts should consist of the soft bronze or a soft material, the sliding plates 18, 24 are made of this material, however Driver element and slider element preferably made of hardened steel. Preferably, the guide brackets 30 are made of bronze, in particular on the one hand to allow a good grip and on the other hand to provide a desired adjustability, if necessary to adjust the slide again accordingly.

In addition to the embodiments shown and described in the preceding figures, numerous other embodiments of wedge drives are possible, in which in each case the upper guide part, in particular slider guide element and slide element, is held together by means of guide brackets. The arrangement and other physical training of the wedge drive can be chosen arbitrarily, as long as thereby the advantages that brings the connection of the elements of the upper guide member by guide brackets, not lost. For example, the slider guide element can also be actuated by a horizontal pressing force, wherein the slider element is then moved vertically. Again, the provision of the guide brackets proves to be advantageous. However, these may have a different orientation in space and a different shape, which is preferably adapted to the particular case. Guide brackets can thus be provided independently of the other configuration and Verfahrlage the wedge drive. They not only allow a special stability of the wedge drive, but also a small design, high running accuracy and the inclusion and generation of high pressing forces. In addition, these wedge drives with guide brackets are inexpensive to produce, since in particular no reworking as in the prior art for adjustment purposes is required, which in the prior art regularly with numerous out and installations of the wedge drive and his Individual parts, such as slide guide element and slider element, is connected.

LIST OF REFERENCE NUMBERS

1

cotter

2

Fixfläche

3

horizontal line

4

vertical line

5

oblique line

6

Tooling point

10

Cam guiding element

11

groove

12

sliding plate

13

screw

14

inside

15

top

16

recess

17

Through Hole

18

sliding surface

19

area

20

slide element

21

groove

22

page

23

sloping surface

24

sliding plate

30

guide bracket

31

retaining projections

32

bevel

33

screw

40

driving element

41

driving backdrop

42

Floor space

43

prismatic part

44

flanks

50

spring element

51

bearing plate

52

stock items

53

locking screw

60

positive-

61

retaining projection

62

screw

α

Angle in the slider element

a

traverse

b

traverse

c

traverse

Claims (14)

1. Cotter key with an upper guiding part containing a cam element (20) and a cam guiding element (10), and with a lower guiding part containing a driver element (40), characterised in that the upper guiding part (10, 20) is holdable and/or held together by at least one guiding clamp (30).
2. Cotter key according to claim 1, characterised in that the at least one guiding clamp (30) joins the cam element (20) and the cam guiding element (10) together.
3. Cotter key according to either claim 1 or claim 2, characterised in that the guiding clamp(s) (30) is/are engageable or engage(s) positively with the cam guiding element (10) and/or with the cam element (20).
4. Cotter key according to any one of the preceding claims, characterised in that the at least one guiding clamp (30) has retaining projections (31) by means of which it engages with a part (11) of the cam guiding element (10), said retaining projections having a slope (32).
5. Cotter key according to claim 4, characterised in that the retaining projections (31) have a slight slope (32), in particular a slope of substantially 1° in the direction of the driver element (40).
6. Cotter key according to either claim 4 or claim 5, characterised in that linear adjustment of the guiding play and/or setting of the sliding play between the upper (10, 20) and lower guiding part (40) is provided by the guiding clamp(s) (30), in particular that the guiding clamp(s) (30) and the upper guiding part (10, 20) are so engageable with each other that a linear displacement of the guiding clamp(s) in the direction of stroke of the cotter key (1) leads to a change in the guiding play transversely to the direction of action of the driver element (40), while the linearity of the guiding play remains substantially constant.
7. Cotter key according to any one of the preceding claims, characterised in that the cam element (20) and the cam guiding element (10) have substantially the same width and in particular substantially parallel faces, to which the at least one guiding clamp (30) can be fastened.
8. Cotter key according to any one of the preceding claims, characterised in that the lower and/or upper guiding part (10, 20, 40) has a prismatic part (43) and/or at least a prismatic surface to guide the cam element (20) and/or to take up lateral forces for the generation of high running precision.
9. Cotter key according to any one of the preceding claims, characterised in that the cotter key (1) has a substantially uniform width over its entire width extension.
10. Cotter key according to any one of the preceding claims, characterised in that one or more fixed faces (2) is/are provided for the generation of a reproducible starting position of the cotter key between the cam guiding element and the cam element.
11. Cotter key according to any one of the preceding claims, characterised in that a spring element (50), particularly a gas spring, is provided to return the cam element (20), which by means of a securing element, particularly a securing screw (53), is secured in the cam element and is removable by means of it.
12. Cotter key according to any one of the preceding claims, characterised in that the individual elements sliding on one another are made of a material combination of bronze and hardened steel, particularly in combination with a lubricant, particularly a solid lubricant.
13. Cotter key according to any one of the preceding claims, characterised in that positive returns (60) are provided to prevent the action of lateral moments on the cotter key between the driver element (40) and cam element (20).
14. Cotter key according to claim 13, characterised in that the cam element (20) is displaceably connectable or connected to the driver element (40) so that lifting-off from the prismatic part (43) is substantially only possible in the starting position.

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