GB2038215A

GB2038215A - Feed apparatus drive system

Info

Publication number: GB2038215A
Application number: GB7944044A
Authority: GB
Original assignee: Individual
Current assignee: Individual
Priority date: 1978-12-28
Filing date: 1979-12-21
Publication date: 1980-07-23
Also published as: IT1119997B; IT7953849V0; FR2445189A2; FR2445189B2; GB2038215B; JPS5589165A; IT7969483A0; DE2856560C2; BR7908571A; JPS6354625B2; DE2856560A1

Abstract

An intermittent wire or strip feed apparatus has a driving shaft (1) and a driven member (11), between which are two eccentric members (3 and 6) and a train of gear wheels (5, 14, 10'). The first eccentric member (3) rotates with the driving shaft (1) and has a parallel shaft (axis F). The second eccentric member (6) is rotatable about that shaft, and the driven member (11) is journalled on the member (6). The gear wheel train (5, 14 10') drives the second member (6) from the shaft (1). A gear wheel support (10) for the gear wheel (10') is mounted on the first eccentric member (3). An intermediate gear wheel support (118) may be provided for another gear (14) of the train. The orientation of member 10 changes little or not at all as connecting rod 11 reciprocates, whereby gear 14 rolls within gear 10' to drive gear 5 and rotate eccentric 6, thus adding a component of motion to rod 11 at e.g. three times drive shaft speed. The extent and angular disposition of the eccentricity Z of 6 or 3 may be adjusted by angularly positioning 5,6,7 by screws 6a, 7a. <IMAGE>

Description

SPECIFICATION Feed apparatus drive system The present invention concerns feeding apparatus, such as can be used for the supply of wire and/or strip on wire and strip processing machines, the apparatus comprising a driving shaft rotating about a driving spindle, a first eccentric member rotating with this driving shaft and having an axis of a first eccentric member located in parallel with the driving axis, a second eccentric member following the movement of the first eccentric member about the driving spindle and having an axis of a second eccentric member located in parallel relative to the axis of the first eccentric member being rotatable about an axis of rotation of the eccentric member, while this second eccentric member is rotatable about an axis of rotation of the eccentric member, and, by means of a train of gear wheels, receives a movement of rotation derived from the rotation of the driving shaft and set into rapid motion about the axis of rotation of its eccentric member and in which the driving movement for the feeding device is received from the second eccentric member by means of a driven member which is journalled to rotate on the second eccentric member.

A drive of this type is known from German OS 24 50 970.

Drives of this type are used in order to impart to the drawn-in slide of the wire or strip processing machines which slide has to transport the wire or strip material to be processed, a movement deviating from the pure sinusoidal motion and produces an extended stoppage of the slide at its point of return, in order thereby to achieve an extended period of machining within the scope of the machine.

More precise details thereon will be apparent from the description of the drawings.

In the case of the known drive according to German OS 24 50 970, it is not possible to change the eccentricity and consequently the stroke of the driven member without completely re-designing the entire driving system.

The object of the present invention is to re-design the above described drive so that the condition for a simple change of the eccentricity at least of the first eccentric member exists and preferably also for changing the eccentricity of the second eccentric member.

In order to achieve this object it is proposed, according to the present invention, that a gear wheel support should be mounted on the first eccentric member and retain its position in space to a substantial extent and carry a gear wheel located in the train of gear wheels.

Due to the fact that the gear wheel support should be mounted on the first eccentric member, it is automatically jointly adjusted with the change of the eccentricity of the first eccentric member.

Further features of the invention will be apparent from the sub-claims.

The present invention will be described hereinafter with reference to various embodiments and the accompanying drawings, in which: Figure 1 shows the essential part of a first embodiment of a drive of the present invention, Figure 2 shows a longitudinal section through a second embodiment of the drive of the present invention, Figure 3 shows a plan view of a drive according to Figure 2, Figure 4 shows a section taken on the line IV-IV of Figure 3, Figure 5 shows a longitudinal section, according to Figure 2, of a third embodiment of the invention, Figure 6 is a schematic view of the drive of a draw-in slide obtained by means of an intermediate lever.

Figure 7 shows a longitudinal section of a fourth embodiment of the invention, corresponding to Figures 2 and 5, Figure 8 shows a section taken on the line VIlI-VIlI of Figure 7, Figure 9 shows a longitudinal section of a modification of the embodiment shown in Figures 7 and 8 and consequently a fifth embodiment of the invention and Figure 10 shows a section taken on the line X-X of Figure 9.

Figure 1 shows a schematic view of the first embodiment. A rotating disc or driving shaft 1 rotates synchronously with a wire of strip bending machine (not shown) which is intented to process or machine the material to be drawn-in. One rotation of the disc 1 corresponds to one complete working stroke of the machine. The disc 1 rotates about a first driving shaft A. A first carrier 2 of an eccentric member is adjustable along the disc 1 towards the arrow B in a manner not shown in detail. The first eccentric carrier 2 supports a first eccentric member or eccentric bolt 3, the eccentricity E of which relative to the driving shaft A depends on the adjustment of a first eccentric carrier 2. A spur gear 5 is mounted to rotate freely on the eccentric bolt 3 by means of bearings 4.Located above the spur gear 5, on the eccentric bolt 3, are two telescoped eccentric bushes 6 and 7, namely an eccentric base member 6 and an eccentric construction member 7, the eccentric member 6 of which has a peripheral section 8 concentric to the first axis F of the eccentric bolt 3. A gear wheel support 10 is journalled to rotate freely on this peripheral section 8 by means of a bearing 9.

Journalled on the member 7 is a connecting rod 11, the other end of which transmits a reciprocating movement to the drawn-in slide (not shown). A disc 12 secures the individual parts on the eccentric bolt 3. An intermediate gear 14 is journalled to rotate freely about an axis of rotation K on the first eccentric support 2 with a clearance from the bolt 3 by means of another bolt 13. The intermediate gear 14 is in engagement both with the inner teething 10' of the gear wheel support 10 and with the gearwheel 5. In a radial attachment 15 the gear wheel support 10 carries a bolt 16 which is rotatable in the attachment 15 about an axis parallel to the axes F and K. The head of the bolt 16 is formed as a sleeve 17 in which the connecting rod 11 is displaceable.

The second axis G of the eccentric member, which is also the axis of the bore of the connecting rod head 11 a is displaced relatively to the first axis F of the eccentric bolt 3 by the eccentricity Z is dependent on the relative position of rotation of the eccentric bushes 6 and 7.

The eccentric basic member 6 is non-rotatably connected to the gear wheel 5 by screws 6a. A plurality of screw receiving holes is provided in the spur gear 5 so that the member 6 of the eccentric can be adjusted into various positions of rotation relative to the gear wheel 5. The accentric member 7 is secured to the basic member 6 of the eccentric by screws 7a. A plurality of bores for receiving the screws 7a are provided also in the member 6 so that the member 7 can be secured in various positions of rotation relative to the member 6. By turning the member 6 relative to the gear wheel 5 and by turning the member 7 relative to the member 6 the eccentricity Z may be varied.

If, in the described arrangement, the disc 1 is rotated about the driving shaft A, the first eccentric carrier 2 and the eccentric bolt 3 turn therewith about this driving shaft A. At the same time, the intermediate gear 14 rolls over the inner teeth 10' of the gear wheel support 10, since this is retained bythe engagement with the connecting rod 11 and thereby rotates about the axis F of the first eccentric member relatively to the eccentric bolt 3. The rotation of the intermediate gear wheel 14 about the axis K is transmitted to the gear wheel 5 which is nonrotatably connected to the basic member 6, so that both eccentric bushes 6, 7 turn about the eccentric bolt 3.The movement of translation executed by the connecting rod 11 results from a super-position of the circular movement executed by the eccentric bolt 3 about the driving shaft A and the movement of the eccentric bushes 6, 7, effected relatively to the eccentric bolt 3, about the axis F of the first eccentric member, said axid being simultaneously the axis of rotation of the second eccentric member 6, 7, i.e. of the eccentric bushes 6, 7.

The transmission ratio through the gear wheels 4, 14 and 10' is selected so that the second eccentric member 5, 6 rotates at three times the speed as the first eccentric member 3. The motion of the connecting rod in the direction of the plane of the drawing therefore corresponds in its timing to a periodic funtion. This periodic function is composed of a sinusoidal basic wave and a likewise sinusoidal third upper wave. The frequency of the sinusoidal basic wave corresponds to the speed of the disc 1 about the driving shaft A. The amplitude of the sinusoidal basic wave corresponds to the eccentricity E.The frequency of the third upper wave corresponds to the speed of rotation of the second eccentric member 6, 7 about the axis F of the first eccentric member, said speed, due to the selected transmission ratio, being three times as great as the speed of the disc 1 about the drive shaft A. The amplitude of the third upper wave corresponds to the eccenctricity Z. The wave which is produced by the superposition of the sinusoidal basic wave and the sinusoidal third upper wave and represents the periodic movement of the connecting rod 11 in the plane of the drawing, corresponds approximately to a trapezium wave with flanks made steeper relative to the sinusoidal basic wave, and wide plateaux.This form of wave is advantageous for the drive of the draw-in slide of a wire or strip processing machine, because, corresponding to the wide plateaux at the return points of the slide, a delayed stoppage of the slide occurs so that, during the period in which the slide is stopped, processing of wire or strip may take place.

It is desirable to keep these processing times as long as possible during which the slide and, consequently, the treated strip is stationary, in order thereby to have available a long operating time on the wire or strip to be machined, for the machining of the wire or strip can be effected only during the stoppage of the draw-in slide and, consequently of the wire or strip. This requirement is fulfilled by the drive of the present invention. According to the super-position of a sinusoidal basic wave and a sinusoidal third upper wave, the plateaux of the resultant trapezoidal wave are not exactly horizontal, so that no stoppage of the slide to be driven can be effected in the strict sense by the drive.However, it is possible, within the drive of the slide, i.e. for example, within the connecting rod 11, to provide an elastic member and to drive the slide in its reversing areas against fixed stops, so that the draw-in slide stops actually for a longer period at the reversing point, during which time the machining of the wire or strip can take place.

In fact, the movement of the connecting rod 17 does not take place exactly in the plane of the drawing according to Figure 1. Since, however, the connecting rod 11 may be comparatively long as far as the slide coupled thereto, and much longer than the eccentricities E and Z, it may be assumed as an approximation that the connecting rod 11 executes a linear movement in the plane of the drawing according to Figure 1, the time of which corresponds to the above-discussed approximate trapezoidal wave.

Figure 6 shows a connection of the rod 11 with a slide 32 of a wire or strip bending machine. The slide 32 is driven from the connecting rod 11 by means of an intermediate level 30 and a coupling member 31.

The intermediate lever 30 is pivotable at 34 about a bearing point on the machine. At 36 the connecting rod 11 is linked to the intermediate lever 30. The coupling member 31 is linked at 35 to the intermediate lever and at 37 with a slide 32. The slide 32 is provided with clamping members (not shown) which, with the advance of the slide 32, carry the strip or wire material to be treated, with a clamping action and, upon the return stroke of the slide 32, move freely backwards over the wire or strip material.

A special advantage of the drive, according to Figure 1 of the present invention, is that the eccentricity E and the eccentricity Z can be changed without transforming the drive so that, accordingly, the drawn-in stroke of the slide 32 can be changed according to the desired period of processing of the strip of wire material.

Attention should be paid to the fact that the gear wheel carrier 10 retains substantially its arrangement in space whilst in continuous operation, because it is coupled to the connecting rod 11 which in turn retains its position in space, in any case, if of a suitable length.

A second embodiment of the present invention is shown in Figures 2-4. The corresponding members of Figure 1, on the one hand, and of Figures 2 to 4, on the other hand, are shown in Figures 2-4 with a reference number increased by 100. As support for the first eccentric member, i.e., the eccentric belt 103, a first eccentric carrier 102 is provided which is adjustable on the driving disc 101 by means of a spinde 102' for adjusting the eccentricity E of the eccentric bolt 103 relative to the driving shaft A of the disc 101. At the supporting end of the eccentric bolt 103 and by means of bearings (not shown), an initial eccentric bush, namely the base member 106, is mounted to rotate on the eccentric bolt 103. By means of a toothed shaft 106a or the like, a second eccentric bush, namely an eccentric construction member 107, is in fixed engagement with the eccentric base member 106.Both eccentric bushes 106 and 107 together form the second eccentric member 106,107, the eccentricity Z of which (space between the first eccentric member axis F and the axis G of the second eccentric) depends on the relative angular position of both bushes 106 and 107.

Integral with the eccentric bush 106 is a gear wheel 105 which is concentric with the first eccentric axis F.

The gear wheel 105 is disposed on the side of the bush 106 remote from the support. By means of a toothed shaft profile or the like an intermediate gear wheel support 118 is secured to the upper end of the eccentric bolt 103. The support 118 carries a bearing pin 113 on which an intermediate gearwheel 114 is mounted to rotate about the axis K by means of a bearing. The intermediate gear wheel 114 meshes with the gear wheel 105. The gear wheel support 110 is journalled to rotate about the axis on the circumference of the intermediate gear support 118 by means of a bearing. The support 110 is provided at the level of the gear wheels 105 and 114 with an inner serration 110' which is concentric to the axis T and meshes with the intermediate gear wheel 114. A disc 112, secured by means of screws 119, holds the arrangement together.The gear wheel support 110 is integral with an arm 115 which projects in the direction of a connecting rod from the support 110.

The connecting rod assembly 111 is composed of a connecting rod holder journalled on the outer eccentric bush 107 and a rod member 111" clamped with the connecting rod holder 111'. The rod 111" is connected (in a manner not shown) to the slide 32 (Figure 6). The connecting rod holder 111' has a pin 120 extending into a slot 121 of the arm 115, so that the gear wheel carrier 110 is in engagement with the connecting rod holder 111' for rotation and displacement. This engagement results in the gear wheel support 110 being displaced, upon a rotation of the bolt 103, practically in parallel with itself, whilst the arm 115, as the connecting rod assembly 111, apart from the slight pivotal movements, always points in the same direction. In fact this corresponds to a rotation of the gear wheel support 110 relatively tothe intermediate gear wheels support 118.This rotation is transmitted by means of the intermediate gear wheel 114 to the gear wheel 115 and thus to the second eccentric member 106, 107. Hence, even with this embodiment of the connecting rod assembly 111, in addition to the movement originating from the rotation of the eccentric bolt 103, an additional movement is imparted on the connecting rod assembly 111, caused by the rotation of the second eccentric member 106, 107 about the eccentric bolt 103.

Since the engagement between the connecting rod 111 and the second eccentric member 106, 107 lies close to the second eccentric support 102, the bending forces resulting from the movement of the connecting rod 111" can be easily absorbed. Various intermediate discs, which are arranged in the described situation between parts moved relatively to each other, are not shown in detail. Lubrication attachments are shown by 122 in Figures 3 and 4.

Two screws 123 serve for retaining the rod member 111" in the slotted holder 111" of the connecting rod assembly 111. The connecting rod assembly 111 could also be formed in one piece. Similarly, it is not necessary to the invention that the gear wheel 105 should be made integral with one of the eccentric bushes 106, 107, It is important to have a fixed connection of a gear wheel 105 with a second eccentric member 106, 107.

In this embodiment the transmission ratio, effected by the toothed wheels 105 and 114, as also by the inner serration 110', is such that the gear wheel 105 and, consequently the second eccentric member 106, 107 turn with three times the speed of the disc 101 about the eccentric bolt 103.

Another embodiment of the invention is shown as a longitudinal section in Figure 5. Corresponding or similar parts of the above-mentioned embodiment and this embodiment are shown in Figure 5 by a numeral increased by 100. As in this embodiment, the eccentric bolt 203 is supported, as in the preceding embodiments, by an initial eccentric member support 202. Journalled on the supporting end of the eccentric bolt, the second eccentric bolt 203 is supported, as in the preceding embodiments, by an initial eccentric member support 202. Journalled on the supporting end of the eccentric bolt, the second eccentric member 206, 207, in the form of two telescoped eccentric bushes 206 and 207, namely the eccentric base member 206 and the eccentric construction member 207 is journalled to rotate about said bolt.Both eccentric bushes are connected to be adjustable again for example by means of a serrated shaft section or the like, non-rotatably, but relatively to each other. The connecting rod 211 is mounted on the outer bushing 207 by means of a bearing. The rod rests on an intermediate disc 224 and is secured at the top by a collar 207' of the eccentric bush 207. A gear razz,eei 205 is integral with the eccentric bush 206; the gear wheel is concentric with the first shaft F of the eccentric member and is disposed at the end of the eccentric bush 206 remote from the support. A mount 218 is non-rotatably connected to the upper end of the eccentric bolt 203 remote from the support, by means of a wedge 225.

Laterally of the eccentric bolt 203 the mount 218 has a U-shaped attachment, between the shanks of which a gear wheel 214 is provided. Said gearwheel 214 is non-rotatably mounted on a gear wheel support 213 journalled in the shanks of the U-shaped attachment 218a, by means of a wedge 226 connected non-rotatably to an arm 215. The arm 215, similarly to the arm 115 of the preceding embodiment, can be rotatably and longitudinally displaceably attached to the connecting rod 211. Another possibility of securing the free end of this arm 215 will be described later with reference to Figure 6.

The gear wheel 214 meshes with the gear wheel 205.

Upon a rotation of the eccentric bolt 203 about the driving shaft A, the mount 218 rotates untwistably connected to the eccentric bolt 203. Since the gear wheel support 213 and, together therewith, the gear wheel 214 are substantially secured by means of the arm 215 in their position, the gearwheel 214 turns upon a rotation of the eccentric bolt 203 about the axis T of the gear wheel support relatively to the mount218. The turning of the gearwheel 214 is transmitted to the gear wheel 205 and from the latter to the eccentric bushes 206 and 207, so that the later turn relatively to the eccentric bolt 203 with a speed dependent on the transmission ratio of the two gear wheels, for example, again with a speed increased three times relative to the speed of the disc 101.

Compared with the second embodiment of the invention, the third embodiment has the advantage that only two externally serrated spur gears are required for the additional rotation of the second eccentric member 206, 207. This is achieved by a somewhat less compact construction than in the case of the second embodiment. Again, with this third embodiment, however, there is the advantage that the point of engagement of the connecting rod 211 is disposed on the second eccentric member 206, 207 near the point of attachment of the eccentric bolt 203 on the first support 202 of the eccentric member, so that the force exerted by the connecting rod 211 can be introduced by a short lever arm into the support 202 of the first eccentric member.

The connecting rod 211 can, according to the schematic Figure 6, act by means of the intermediate lever 30 on the drawn-in slide 32 in order to reciprocate said slide in the direction of the arrow 33 between two stops (not shown). However, the connecting rod 11 may also engage directly on the draw-in slide 32. The ratio of the spacing between the joints 34 and 36 and 36 and 35 in Figure 6 influences the stroke of the slide 32. The axes of the joints 34,35,36 and 37 are substantially parallel to the axes A, F and T.

The arm 215 of Figure 5 may be supported in the described manner by a pivotable and longitudinally displaceable engagement with the connecting rod 211. Instead of this, however, the arm 215 may also engage in a guide mounted to rotate about the axis of the joint 36 in Figure 6 and permitting a displacement in the longitudinal direction ofthe arm 215.

The same also applies to the embodiment in Figures 1-4.

In the previously described embodiments of the invention the second eccentric member 6,7 or 106, 107 or 206,207 is journalled in each case to rotate about the eccentric bolt 203. Figures 7 and 8 shown an embodiment in which the second eccentric member is arranged with a clearance parallel to the eccentric bolt.

Figure 7 represents a longitudinal section through this embodiment, corresponding parts being again provided with similar reference numerals as previously, in each case increased by the number 300. The eccentric bolt 303 is again mounted on a first eccentric member support 302 for adjusting its eccentricity E. The carrier 302 is displaceable on the driving disc 101 relative to the driving shaft A. A gear wheel support 318 is journalled to rotate on the eccentric bolt 303 by means of bearings. A gear wheel 330 is non-rotatably mounted on the eccentric bolt 303 within a recess of the gear wheel support 318. Parallel with and at a clearance from the eccentric bolt 303 a shaft 300 is mounted at both ends to rotate freely in the gear wheel support 318 namely to rotate about an axis T of a second eccentric gear.The shaft member 300 is provided with an eccentric section 306 which is to be understood as an eccentric base member, on which section an eccentric bush 307 to be understood as eccentric construction member is non-rotatably mounted by means of a toothed shaft section or the like. The connecting rod 311 is journalled to rotate about the eccentric bush 307 by means of a connecting rod eye 311'. The eccentricity Z of the second eccentric member 306,307 formed by the shaft section 306 and the eccentric bush 307 may be adjusted similarly as in the case of the preceding embodiments. A gear wheel 305 concentric to the second axis T of the second eccentric member is non-rotatably connected to the shaft 300 and engages with said gear wheel 330 by means of an intermediate gear wheel 314.The gear wheel 314 is journalled to rotate freely in the gear wheel support 318 (see also Figure 8) In an extension 315 of the preferably bipartite gear wheel support 318 a guide sleeve 317 through which the connecting rod 311 slides is journalled to rotate about an axis parallel to the axes F, G and P. The guide sleeve 317 permits a relative displacement between the connecting rod 311 and the gear wheel support 318 in the longitudinal direction. A slight swivelling of these two parts relative to each other about the axis of the guide sleeve 317 is also possible. A movement of the gear wheel support 318 going beyond this is prevented, however, by the guide sleeve 317.

When the eccentric bolt 303 begins to turn about the driving shaft A, the gear wheel 330 then also rotates about this driving shaft A, but not about its own axis F. Since the gearwheel support 318 is retained in the described manner, the intermediate gearwheel 314 is turned about its axis and transmits this motion to the gear wheel 305 and hence to the second eccentric member 306,307. A movement therefore occurs on the connecting rod 311 in this embodiment also, said movement resulting from the superpositioning of the rotation of the eccentric bolt 303 on the one hand, and the rotation of the shaft 300 with the second eccentric member 306,307, on the other hand.

The sectional drawing in Figure 8 taken on the line VIII - VIII of Figure 7 shows the position of the gear wheels 330,314 and 305. The gear wheel support 318 may be composed of a lower housing member 318a and an upper housing member 318b which are connected together by means of screws.

Figures 9 and 10 show in a longitudinal section and in cross-section an embodiment of the invention modified with reference to Figures 7 and 8. Only the differences from the preceding embodiment are described hereinafter.

The gear wheel support 418 differs in the form of the gearwheel support 318 and does not have an attachment corresponding to the attachment 315. A slide block 417 is arranged to rotate on the eccentric bolt 403. Said slide block 417 is received longitudinally displaceably in a recess 411' of a rear extension 411U of the connecting rod 411. These measures ensure thatthe gear wheel support 418 on the one hand, and the connecting rod 411, on the other hand, always substantially retain their relative alignment with each other. By the engagement between the slide block 417 and the extention 411" of the connecting rod 411 the same effect is achieved as by the engagement of the connecting rod 311 in the guide sleeve 317 of Figures 7 and 8.

The eccentric bolt 403 is constructed with different diameter sections which facilitate the securing of the relatively moved parts of the eccentric bolt.

Again, in the last two embodiments described, the entire driving mechanism, which affects the rotation of the second eccentric member, is provided on the end of the connecting rod 411 remote from the support, so that the additional eccentric member 406, 407 may be in engagement with the connecting rod near the support and the previously mentioned advantages are also obtained in this case.

In the embodiment according to Figure 9, the intermediate gearwheel 414, is journalled, as in the embodiment according to Figure 7, to rotate on the support 418 about an intermediate gear axis K. The shaft 400 in Figure 9 corresponds to the shaft 300 in Figure 7 and is also journalled to rotate in the intermediate gear wheel support 418.

Claims

1. Feed apparatusforthe infeed of material in machines or apparatus, comprising a driving shaft rotatable about a driving axis, a first eccentric member rotatable with said driving shaft and, with a first eccentric member shaft located in parallel relatively to the driving axis, a second eccentric member following the movement of the first eccentric member about the driving axis comprising a second eccentric member shaft parallel to the axis of the first eccentric member, said second eccentric member being rotatable about a shaft of an eccentric member and, by means of a train of gear wheels, receiving a turning movement about its axis of rotation derived from the rotation of the driving shaft and set into fast motion, and wherein the driving movement for the feed device is derived from the second eccentric member by way of a driven member which is journalled to rotate on the second eccentric member, a gear wheel support mounted on the first eccentric member. Said support substantially maintaining its position in space and carrying a gear wheel in the train of gear wheels.

2. Apparatus as claimed in claim 1, wherein the second eccentric member is caused to rotate about its axis with a speed which corresponds to an odd whole number multiple of the speed of rotation of the driving shaft.

3. Apparatus as claimed in claim 2, wherein the odd whole number is a multiple of 3.

4. Apparatus as claimed in any one of claims 1 3, wherein the eccentricity of the first eccentric member is variable relative to the driving axis.

5. Apparatus as claimed in claim 4, wherein the first eccentric member is arranged on a first eccentric member support which is adjustable relative to the driving axis.

6. Apparatus as claimed in any one of claims 1 5, wherein the first eccentric member is an eccentric bolt which forms an axially parallel extension of the driving shaft.

7. Apparatus as claimed in any one of claims 1 6, wherein the eccentricity of the second eccentric member is variable relative to its axis of rotation.

8. Apparatus as claimed in claim 7, wherein the second eccentric comprises two eccentric members namely a basic member and a construction member which is rotatable relative to the basic member and can be made stationary relative thereto.

9. Apparatus as claimed in any one of claims 1 8, wherein the gearwheel support is secured substantially in its position in space by being supported on a connecting rod serving as a driven member and mounted on the second eccentric member.

10. Apparatus as claimed in claim 9, wherein the gear wheel support rests on the connecting rod by a supporting arrangement permitting a sliding and turning motion.

11. Apparatus as claimed in any one of claims 1 10, wherein the second eccentric member is journalled to rotate on the first eccentric member about its first axis and that a gear wheel non-rotatably connected to the second eccentric member and concentric to the first axis of the first eccentric member is in rolling engagement with an inner toothed crown firmly mounted on the gear wheel support, whilst the gear wheel support is mounted to rotate on the first eccentric member concentrically to the first eccentric axis (F).

12. Apparatus as claimed in claim 11, wherein the gear wheel non-rotatably connected to the second eccentric member, is in engagement with the inner toothed crown of the gear wheel support by way of an intermediate gear wheel, whilst this intermediate gear wheel is journalled about an intermediate wheel axis fixed relatively to the first eccentric member axis.

13. Apparatus as claimed in claim 11 or claim 12, wherein the gear wheel concentric relative to the first eccentric member is rotatable and fixable relative to the basic eccentric member of the second eccentric.

14. Apparatus as claimed in any one of claims 1 10, wherein the second eccentric member is journalled to rotate on the first eccentric member about the axis of the first eccentric and is connected with a gear wheel concentric to the first axis of the first eccentric, wherein an intermediate gear wheel support is non-rotably mounted on a first eccentric member, said support carrying an intermediate gear wheel journalled to rotate about an axis displaced in parallel relative to the first axis of the eccentric member, wherein this intermediate gear wheel meshes with the gear wheel concentric to the first eccentric member and wherein the gear wheel support is journalled to rotate on the first eccentric member about a gear wheel support axis parallel to the first axis of the eccentric member and has an inner serration concentric with the gear wheel support axis, said serration meshing with the intermediate gearwheel.

15. Apparatus as claimed in claim 14, wherein the gear wheel support is journalled to rotate on the intermediate gearwheel support.

16. Apparatus as claimed in claim 14 or claim 15, wherein the second eccentric member is journalled directly adjacent to the first eccentric carrier on the first eccentric member formed as an eccentric bolt, wherein the gear wheel concentric with the first eccentric member and non-rotatably connected to the second eccentric member is disposed on the side of the second eccentric member, remote from the first eccentric member support and wherein the intermediate gear wheel support is disposed on the side remote from the first eccentric support and associated with the gear wheel concentric with the first eccentric member.

17. Apparatus as claimed in any one of claims 1 to 10, wherein the second eccentric member is journalled to rotate on the first eccentric member about the axis of the first eccentric member and is non-rotatably connected to a gear wheel concentric with the axis of the first eccentric member, wherein the gear wheel support is rotatably journalled in a member non-rotatably journalled on the first eccentric member about the axis of a gear wheel support concentric with the axis of the first eccentric member and wherein an intermediate gear wheel is nonrotatably journalled on the gear wheel support and concentric with the axis of the gear wheel support, said intermediate gear wheel meshing with the gear wheel concentric with the axis of the first eccentric member.

18. Apparatus as claimed in claim 17 wherein the second eccentric member is mounted on the first eccentric member formed as an eccentric bolt and directly adjacent to the support of the first eccentric member, wherein the gear wheel concentric with the axis of the first eccentric member is disposed on the side of the second eccentric member remote from the support of the first eccentric member and wherein the mount is secured to the first eccentric member is secured to a side remote from the support of the first eccentric member and associated with the gear wheel concentric with the first eccentric member.

19. Apparatus as claimed in any one of claims 1 to 10 wherein the second eccentric member is journalled to rotate in a gear wheel support journalled to rotate about the axis (F) of the first eccentric member about a second axis of rotation of the eccentric member parallel to the axis of the first eccentric member, wherein a gear wheel concentric with the first eccentric member is non-rotatably mounted on the first eccentric member and wherein on the second eccentric member there is mounted concentrically with the axis of the second eccentric member and connected non-rotatably to the second eccentric member, a further gear wheel in engagement with the gear wheel concentric with the axis of the first eccentric member.

20. Apparatus as claimed in claim 19, wherein said other gear wheel meshes with an intermediate gear wheel which is also journal led to rotate in the gear wheel support and in addition meshes with the gear wheel concentric with the eccentric member.

21. Apparatus as claimed in any one of claims 1 to 8, wherein the second eccentric member is journalled to rotate in a gear wheel support journalled to rotate on thefirst eccentric member about the axis of the first eccentric member about the axis of the second eccentric member located parallel to the axis of the first eccentric member, wherein the driven member is displaceable by a thrust and rotary connection on the first eccentric member and about the axis of the first eccentric member, wherein there is arranged on the first eccentric member a gear wheel concentrictherewith and rigidly connected thereto, and wherein this gear wheel concentric with the first eccentric member is concentric with the gear wheel arranged concentrically with the axis of the second eccentric member and non-rotatably connected to the second eccentric member.

22. Apparatus as claimed in claim 21, wherein the gear wheel concentric with the axis of the first eccentric member meshes with an intermediate wheel which is journalled to rotate on the gear wheel support about an axis of an intermediate gear wheel parallel to the axis of the first eccentric member and wherein this intermediate gear meshes with the other gear wheel non-rotatably provided on the second eccentric member.

23. Apparatus as claimed in claim 21 or claim 22, wherein a slide block is journalled to rotate on the first eccentric member and is displaceably guided in a slot of the driven member perpendicular to the axis of the first eccentric member.