JPH0615509A - Device for producing adjusting force for fastening member of fastening device - Google Patents

Abstract

PURPOSE: To accurately and simply tighten or loosen an adjustment rod, even when the main working spindle is rotated. CONSTITUTION: This device is useful for generating an adjustment force for the tightening member 2 of a tightening device 1 in a lathe main working spindle 4 capable of driving for rotation. In the inside of the hollow main working spindle 4, an adjustment rod 8 for operating the tightening member 2 is arranged so as to be movable in the axial direction. A motion converting system 9 rotating together with the main working spindle 4 comprises an output member 10 for operating the adjustment rod 8 in the axial direction, and an input member 12 arranged so as to be rotatable with regard to the main working spindle 4 and in parallel with the axis; and the input member 12 is drivingly connected to either one of two adjustment gear wheels 11' and 11", and these adjustment gears 11', 11" are arranged so as to be coaxial with the main working spindle 4 and rotatable, and are continuously connected in the opposite direction to each other. The adjustment gear wheel 11', 11" are independently braked by a brake device 32 for operating the adjustment rod 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for producing an adjusting force for a tightening member of a tightening device, in particular for adjusting a chuck jaw or the tightening force exerted by this jaw. , Especially for holding a clamping device and being drivable for rotation, for a working spindle of a lathe and for actuating a clamping member axially displaceable in this hollow working spindle A motion conversion system equipped with an adjusting rod and arranged so as to rotate together on the work spindle,
It has an output member for actuating the adjusting rod in the axial direction and at least one input member arranged rotatably with respect to the work spindle and parallel to the shaft, the input member comprising two adjusting gears. The adjusting gears are drive-connected to at least one of the adjusting gears, which are arranged rotatably and coaxially with each other on the work spindle and on the work spindle itself, and are connected in opposite directions.

[0002]

BACKGROUND OF THE INVENTION A device of the above kind is described in published European patent application 89120452.1. In this device, a fixedly arranged adjusting motor works for the operation of the adjusting rod, and this motor works the adjusting gear regardless of whether the work spindle is stopped or rotating. Drives relative to the main shaft. Therefore, the adjusting motor causes tightening and loosening of the tightening member when the work spindle is stopped, and causes re-tightening of the tightening member when the work spindle rotates. The opposite connection of the adjusting gear is caused by a rotary-differential device (differential transmission) which is fixedly arranged in the drive strand between the adjusting gear and the adjusting motor. , The rotational movement initiated by the adjusting motor is split and guided out via two driven gears, which gears are in rotational connection with one of the adjusting gears respectively, one of the driven gears being In the rotational connection between the corresponding adjusting gear and the corresponding adjusting gear, the reversal of the rotational direction is such that the driven gear and the adjusting gear, and accordingly both adjusting gears themselves, are opposite to each other when the adjusting motor is operated. It is made to rotate in the direction.

The disadvantage here is that, in the drive strand, all the transmission gears between the adjusting gear and the driven gear and between the latter itself are of the work spindle itself when the work spindle rotates. Like, and moreover,
It means that the transmission gear rotates even when the clamping member of the clamping device is not activated at all when the work spindle rotates and the adjusting motor is switched off. The above-mentioned stresses of the transmission member lead not only to corresponding wear, but also to permanent permanent power loss, heat and especially noise generation, all of which are associated with high spindle speeds. The further it gets, the more disturbing the phenomenon. Further, the above-mentioned structure is wasteful in structure and easily causes a failure.

The problem underlying the present invention is possible in that the actuation of the adjusting rod in the direction of tightening and loosening when the work spindle rotates is particularly simple and in each case as accurate as desired. Is to configure the device described at the outset.

[0005]

According to the present invention,
The problem is solved by the fact that a braking device is provided, by means of which the adjusting gears can be braked independently of one another, the magnitude of the braking moment being controllable.

The present invention is premised on the following. In other words, in such a solution, the operation of the adjusting rod in the stopped state of the work spindle can be performed without difficulty in principle, and it is technically very difficult from the viewpoint of the driving method and the power transmission method. It is possible in various ways in various ways. The reason for this is that on a stationary work spindle, the connection of the adjusting motor and / or the connection of the pressure medium for power transmission to the stationary motion conversion system can be carried out without difficulty. The connection of the adjusting motor and / or the connection of the pressure medium to the motion converting system which is correspondingly rotating with the work spindle causes greater difficulty as the rotational speed of the work spindle increases. Only then does the actuation of the adjusting rod become problematic. Therefore, it has already been proposed (for example in EP-0200796-A2) to provide a rotating energy storage element together with a work spindle and a clamping device, which storage element is maintained in the work spindle rest state, The movement conversion system is energized by the component, while the work spindle is rotating and is decoupled from the adjusting motor and / or the pressure medium pressure medium which causes the adjusting rod to operate when the work spindle is stopped. However,
The capacity of the energy storage element, which in principle is based on a spring element, is extremely limited.

According to the invention, all the above-mentioned problems are addressed in that when the work spindle rotates, the motion conversion system for actuating the adjusting rod is supplied by the energy transmitted to this work spindle by the drive of the work spindle itself. Accordingly, this energy is surprisingly simply avoided by the fact that this energy is continuously supplied additionally by the drive of the work spindle and therefore cannot be used for anything other than the energy content of the storage element. Therefore, in the device according to the invention, the adjusting motor, the pressure source, and other power means provided, for example, for actuation of the adjusting rod when the working spindle is at rest, rotate the working spindle. It remains uncoupled or disconnected from the motion transduction system when present, which does not render it inoperable. According to the invention, for actuation of the adjusting rod when the work spindle is rotating, one or the other adjusting gear is braked, whereby the adjusting rod is axially moved by the output member of the motion conversion system. Only rotating said adjusting gear relative to the work spindle depending on the direction to be biased, i.e. on whether the tightening member in the tightening device is intended to be retightened or loosened. is necessary. Not only that, but at the same time, the clamping device can easily be opened and closed when the work spindle is operating, which is for clamping the workpiece without forcing a stop of the work spindle. This is what is desired when the rod is in operation. Furthermore,
In that case, in any case, there is a possibility that by controlling the magnitude of the braking moment, the force for urging the adjusting rod and at the same time, the tightening force of the tightening device can be accurately influenced. Certainly, the braking of the adjusting gear naturally involves heat generation, but the heat generation is limited only to the duration of the braking process, that is, to the total operating time, to a very small amount of axial biasing of the adjusting rod. As a result, heat emission can be suppressed without difficulty.

In addition to the purely axial adjustment movement component,
If the output member of the motion converting system is also overlapped with the rotary motion of the adjusting rod, as long as the adjusting rod is non-rotatably connected to the tightening device, the output member of the motion converting system and the adjusting rod are The arrangement must be such that between them an axially movably connected connecting device is inserted which allows the two to rotate freely. In principle, the axial connection between the output member and the adjusting rod can be a form connection as well as a movement connection. However, at that time, during the operation of the motion conversion system, the rotation speed of the work spindle is high, so that there is a risk of a marked maximum impact when the power is transmitted from the output member to the adjusting rod. The shorter the travel distance of the adjusting rod, the greater the risk. In order to buffer the above impact maximum value during power transmission, a power transmission member that enables relative movement between the output member and the adjusting rod within a predetermined range is used as an output member of the motion conversion system. Preferably, it is provided between the adjusting rod and the adjusting rod, and the magnitude of the force transmitted between the adjusting rod and the adjusting rod depends on the relative movement path between the two. Preferably, the power transmission member is formed by a spring element, which supports the output member on the adjusting rod in both axial directions.

Preferably, for connecting the two adjusting gears in opposite directions, there is provided at least one transmission member arranged to rotate together with the work spindle, the transmission member comprising the adjusting gear. In the circumferential direction of the work spindle, it is supported on the work spindle such that the relative rotation of one adjusting gear with respect to this work spindle causes the relative rotation of the other adjusting gear in the opposite direction. ing. The advantage of this is that without the braking of one of the adjusting gears, the adjusting gears rotate in synchronism with each other and with the work spindle, so that the stress of the transmission member only occurs when one of the adjusting gears is braked. There is. In detail, the transmission member is formed by one or more mutually engaging pinions, which are mounted on the work spindle and which engage the gear rims respectively provided on the adjusting gears. Can be configured to Another advantageous embodiment is that the transmission member is formed by one or more central pins, which respectively hold two pinions non-rotatably, which are likewise rotatably arranged on the work spindle. Rotatably mounted in a fixed ring, one pinion of said center pin being on one gear rim of the adjusting gear and the other pinion being on a gear rim fixed to the work spindle, respectively. It is characterized by engaging. In the above case, the second adjusting gear can be expediently formed directly by the ring to which the central pin is attached.

Motion conversion systems are mechanical, pneumatic, and / or
Alternatively, it can be operated hydraulically. In a purely mechanical embodiment, this motion transformation system, in principle,
It has one or more clamping screws, which transform the rotational movement of the input member into an axial adjustment movement of the output member. In this respect, the preferred embodiment for kinematics and dynamics is that the motion conversion system is arranged such that its axes are parallel and eccentric with respect to the work spindle, rotatably and immovably in the axial direction. Having at least one tightening screw shaft attached to the screw thread shaft, the tightening screw shaft extending in a screw thread receiving portion provided in the output member of the motion conversion system, and further, It is drivingly connected to at least one of the adjusting gears in the rotation direction via the input member of the motion conversion system, and in the circumferential direction of the work spindle,
This tightening screw shaft is machined so that the relative rotation of the work spindle facing the adjusting gear drivingly connected to the tightening screw shaft causes rotation of the tightening screw shaft around its own axis. It is characterized by being supported by the main shaft. For the purpose, a plurality of tightening screw shafts are provided, and the tightening screw shafts are distributed over the periphery of the work spindle.

An embodiment which is particularly simple in construction and therefore preferably realized is such that the clamping screw shaft is wholly or partly
In the case of a plurality of tightening screw shafts forming the transmission member, this tightening screw shaft simultaneously fulfills the function of a transmission member for connecting the adjusting gears in opposite directions. When braking the corresponding adjusting gear, in some cases it is very stiff due to the preceding tightening process. Make sure to loosen the tightening screw shaft from the tightening fit in the thread receiving part of the output member. In order to be able to do so, it is preferable to configure the thread receiving portion for the tightening screw shaft in a screwed socket, which socket is rotatably restricted between two stoppers in the output member, Moreover, it is attached so as not to move in the axial direction. Therefore, in the tightening screw shaft, when one of the adjusting gears is braked, the screwed socket is stopped by the stopper, and the impact action on the screw thread engagement created by this is generated in the screw thread receiving part. Until the tightening screw shaft is released, it can be freely rotated by receiving the rotational drive of the screwed socket.

In the motion conversion system, a shape that leads to a particularly symmetric stress relationship is provided with a pair of tightening screw shafts fixedly arranged in the circumferential direction on the work spindle, each of which is for the motion conversion system. Is provided with a pinion as an input member, wherein the first tightening screw shaft of the pair of tightening screw shafts has its own pinion on the gear rim of one adjusting gear, and
The second tightening screw shaft has its pinion engaged with the gear rim of the other adjusting gear, both of these tightening screw shafts engaging in the opposite direction via the other pinion connecting member. In addition, the tightening threads of themselves have opposite screw directions. Since the tightening threads have such opposite screw directions, they cause equal axial movement of the output member on both tightening screw shafts despite the opposite rotation of the tightening screw shafts. .

As already mentioned, the two adjusting gears are connected to one another by means of pinions, which are non-rotatably mounted on a central pin, which is rotatably arranged on the work spindle. If it is intended to be mounted in a ring, the clamping screw shaft can for purpose purpose form the said central pin directly, in which case this central pin can no longer be clamped. It does not need to be additionally provided in addition to the screw shaft.

The braking device has only one brake which is selectively switched or replaced by one or the other adjusting gear, or uses a unique brake for each adjusting gear. Good. that time,
These brakes can be actuated and / or controlled independently of each other. In the simplest embodiment, a braking device is provided with a friction brake for each adjusting gear, in particular a shoe brake or an axial (disc) brake with the adjusting gear configured as a brake plate. May be

With regard to the control and regulation of the braking action, an essentially better and therefore advantageous embodiment is that there is no mechanical wear, so that the braking device for each regulating gear has an adjusting mechanism as a rotor. It is configured as an induction machine that includes a gear and a stator ring that encloses this adjusting gear with an excitation coil, and is configured as an induction machine that functions as a brake. There is. In particular, the induction machine may be designed as an eddy current brake. In each case, the magnitude of the excitation current essentially determines the braking effect. This effect is achieved by the usual electrical engineering switching means, as desired by the switch O.
It is difficult to turn N and OFF, and it is also difficult to control the magnitude of this effect. In addition, the braking device can, as a rule, be able to accept the actual value of the braking moment for controlling and / or adjusting the braking effect, so that the braking device measures the magnitude of the braking moment applied to the adjusting gear. Have a device.

The device of the invention, of course, enables actuation of the motion conversion system by the braking device only when the work spindle rotates. However, the device according to the invention can easily be combined with a device for actuating the adjusting rod for closing and opening, i.e. for tightening and loosening, of the clamping device when the work spindle is at rest. Therefore, in order to operate the adjusting rod in the stopped state of the work spindle, it is possible, of course, to provide a fixedly arranged adjustment motor, and the driven member of this motor has a rotation direction in the stopped state of the work spindle. The adjustment gear can be connected and disconnected. If the adjusting motor is reversible, the possibility of connecting and disconnecting only one of the adjusting gears is sufficient. In other cases, the adjusting motor must be connectable and disconnectable in one and the other adjusting gear, depending on the intended operating direction of the adjusting rod.
In each of the above cases, the work spindle is prevented from its associated rotation by its own drive, which is otherwise caused by the adjusting motor.

However, the entire adjusting motor as described above is omitted, and even when the tightening device is in a stopped state, the adjustment rod is operated, and at the same time, closing and opening of the tightening device, that is, tightening and loosening. Therefore, there is a possibility of using the drive device of the work spindle itself. In this sense, for the actuation of the adjusting rod when the tightening device is in a stopped state, an advantageous configuration according to the invention is that the tightening device is a work spindle, or a part of a work spindle and a motion conversion system. At least one of a tightening device that is rotatably connected to a device that holds a driving member that works for driving with the work spindle, and that can be connected and disconnected in the rotational direction, and the unfastened tightening device and the adjusting gear. The feature is that one of them can be fixed so as not to rotate. The tightening device has been disconnected,
The drive motor for the work spindle, when blocked from rotation like one of the adjusting gears, is either the entire work spindle or the work spindle part of the work spindle holding the motion conversion system. The motion conversion system can be rotated with respect to the clamping device that is stopped. By this, the adjustment rod can be urged and moved in one or the other axial direction. For this purpose, of course, as described above, it is premised that the adjusting rod is freely rotatably connected to the output member of the motion conversion system. For fixing the adjusting gear, the braking device is used if it has a suitable structure such as a mechanical friction brake. In other cases, besides the braking device, a suitable locking device must be provided.

In particular, there are various possibilities for the position of the connection for the clamping device.

In a first preferred embodiment, the tightening device is rotatably mounted on the work spindle and is provided with a connecting device for non-rotatably connecting the tightening device to the work spindle in the connected state. Here, the motion conversion system is wholly moved by the work spindle when the tightening device is stopped. Therefore, it is expedient to provide a locking member which engages an adjusting rod which is non-rotatably connected to the fastening device in order to fix the fastening device when the coupling device is open. Instead of locking such an adjusting rod, the coupling device has a coupling part which is axially movable between the clamping device and the work spindle and is non-rotatably connected to the clamping device. , The connecting portion is in a position where it is connected to the work spindle under the force of the connecting spring and is provided with an adjusting member that is prevented from moving in the circumferential direction of the work spindle. Can move forward,
At this time, the adjusting member may be constructed so as to release the connecting portion from the connected state of the work spindle against the force of the connecting spring and at the same time lock it so as not to rotate.
In the above case, the connecting part is arranged and guided between two connecting flanges, which are mounted so as to be rotatable and axially immovable together,
It is preferable that one connecting flange of these flanges is fixedly connected to the tightening device, and the other connecting flange is fixedly connected to the work spindle. Obviously, the advantage of this first embodiment is that it only requires measures in the arrangement of the clamping device at the head of the work spindle,
This measure is that it can be easily implemented without any special modification of the lathe or the clamping device itself.

On the other hand, in the second preferred embodiment, the tightening device can be fixedly connected to the head of the work spindle by a known method, but the lathe needs to be changed. That is, in this embodiment, the work spindle is divided into a spindle portion for fixing and holding the tightening device and a spindle portion for fixing and holding the motion conversion system and the drive member for the work spindle. , Characterized in that both of the relatively rotatable main spindle portions are connected by a coupling device, and the main spindle portion holding the tightening device can be fixed so as not to rotate in the uncoupled state of the coupling device. There is. Here, the actuation of the motion conversion system takes place only via the main shaft part which holds this motion conversion system, while the main shaft part which holds the fastening device is stationary. At that time, a spindle portion holding a drive member for a work spindle and a motion converting system is rotatably attached to a spindle portion holding a tightening device, and the spindle portion is non-rotatable and axially movable. The connecting member is held by the other main shaft portion, in particular, can be non-rotatably connected to the drive member, and is locked so that the connecting member does not rotate in the connection releasing position of the connecting member. It is structurally convenient.

[0021]

The present invention will be described in detail below with reference to illustrated embodiments.

In the figure, the clamping device 1 is a chuck, which comprises a clamping member 2 or a radially movable chuck jaw. The tightening device 1 is shown diagrammatically and only the chuck jaws of the tightening member 2 are shown. The tightening device 1 includes a head 3 of a work spindle 4 of a lathe.
It is provided in. Other parts of the lathe are not shown. The work spindle 4 is mounted in a headstock (not shown) of the lathe via a bearing 5 shown only in FIGS. 4 and 6. The work spindle 4 is driven by the motor 6 or the driving member 7 shown as a belt pulley in FIG. 12, for example.
Can be driven by a known method. Therefore, this driving method will not be illustrated. A tubular adjusting rod 8 is arranged in the hollow work spindle 4.
By moving the adjusting rod 8 in the axial direction, that is, by applying a force in the axial direction by the adjusting rod 8, the tightening member 2 of the tightening device 1 can be operated. The actuation of the adjusting rod 8 is carried out by a motion conversion system generally indicated by 9. This motion conversion system 9 is arranged so as to rotate together with the work spindle 4. This motion conversion system 9 comprises an output member 10 for actuating the adjusting rod 8 in the axial direction and at least one input member 12, 12 ', 12 "rotatably arranged parallel to the work spindle 4. The input member is drivingly connected to at least one of the two adjusting gears 11 ', 11 ". The adjusting gears are arranged to face each other on the work spindle 4, are coaxially and rotatably arranged with respect to the work spindle itself, and are connected in opposite directions. As a result, the rotation of one of the adjusting gears 11 ', 11 "relative to the work spindle 4 is connected to the corresponding rotation of the other of the adjusting gears 11', 11" in the opposite direction.
Reference numeral 32 denotes the entire braking device. With this braking device, 2
The two adjusting gears 11 ′, 11 ″ can be braked independently of each other, in which case the magnitude of the braking moment can be controlled by the method described below, so that the adjusting spindle can be adjusted when the work spindle 4 is rotating. When one of the gears 11 ′ and 11 ″ is braked, this adjusting gear is rotated relative to the work spindle 4, whereby the adjusting rod 8 moves in the axial direction and moves in the axial direction. Power acts. By braking the other of the adjusting gears 11 ′, 11 ″, the adjusting rod 8 moves in the opposite axial direction and a force acts in this opposite direction, so that when the work spindle 4 is operating. , The tightening member 2 of the tightening device 1 has one or the other adjusting gear 1
Only by braking 1 ', 11 "can it be actuated in the closing direction or in the opening direction, so that, for example, inner and outer clamping is also possible.
The adjusting rod 8 is non-rotatably connected in the tightening device 1.
Therefore, as will be described later, if the motion converting system 9 can be rotated together with the work spindle 4 so as to face the tightening device 1 and the adjusting rod 8 relatively, the output member 10 of the motion converting system 10 can be rotated.
The output member 10 can freely rotate while facing the adjusting rod 8.
The axially kinematic connection 13 between the and must be connected to the adjusting rod 8 so that it remains maintained. For this purpose, in the exemplary embodiment, the adjusting rod 8 is provided with an annular flange 13 ′ on which the output member 10 of the motion conversion system 9 is rotatably guided and supported via the thrust bearing 13 ″. Furthermore, in Fig. 2 said support essentially consists of a form connection, whereas in Fig. 2 a cup spring 100 is arranged between the output member 10 and the adjusting rod 8. This cup spring supports the output member 10 in both axial directions on the adjusting rod 8. As a result, the relative axial movement between the output member 10 and the adjusting rod 8 is influenced by the force of the cup spring 100. However, this relative movement is only possible within a pregiven range, which in the exemplary embodiment is a fully compressed cup spring. In the case of No. 00, the annular flange 13 'is provided by being fixedly fixed to the annular shoulder of the output member 10 supporting the cup spring 100 via one of the thrust bearings 13 "and the cup spring 100. There is.

The two adjusting gears 11 ', 11 "are connected in opposite directions as already mentioned, for which purpose at least one transmission member is provided, which is adapted to rotate together. It is arranged on the work spindle 4. This transmission member is drivingly connected to the adjusting gears 11 ', 11 ". Further, the transmission members 11 ', 11 "are arranged around the work spindle 4 so that the relative rotation of the one adjustment gear 11' with respect to the work spindle 4 causes the opposite rotation of the other adjustment gear 11 'in the opposite direction. Supported in the direction of the work spindle, which is most simply realized as follows: the transmission member is formed by one or a plurality of pinions 14 engaging each other. The pinion 14 is engaged with gear rims 15 mounted on the work spindle 4 and provided on the adjusting gears 11 ′ and 11 ″, respectively. In the embodiment of FIGS. 1 and 3, the pinion 14, alone or together,
It is distributed around the work spindle 4, 1 for each.
It is attached to the work spindle 4 in the radial direction by one central pin 16 and is configured as a bevel pinion. This pinion 14 has two adjustment gears 11 ', 1
Corresponding conically formed gear rim 15 at 1 "
Engage with. In the embodiment of FIGS. 4 to 6, the transmission member comprises one or more central pins 14 'each of which holds two pinions 17', 17 "in a non-rotatable manner. , Rolling bearing 2
0 is also rotatably arranged, and the ring 18 is also rotatably arranged on the work spindle 4 via rolling bearings 19. One pinion 1 of each center pin 14 '
7'is engaged with the gear rim 15 of the adjusting gear 11 ', and the other pinion 17 "is provided with the gear rim 2 fixed to the work spindle 4.
Engage 1. The gear rim 21 is provided on a ring 21 ′ which is arranged on the work spindle 4 such that it cannot rotate but cannot move in the axial direction. Therefore, when the adjusting gear 11 'is rotated in the direction of the arrow 22 in FIG. 5 so as to face the work spindle 4, the center pin 14' is supported by the gear rim 21 fixed to the work spindle 4. Center pin 14 'is arrow 2
Rotation in the direction of 3 and as a result, the ring 18 as a whole
The rotation in the direction of arrow 24 is caused. That is, in the result, the rotation of the adjusting gear 11 'is opposite to the rotation of the ring 18. Therefore, in the case of FIG. 4, the ring 18 directly forms the second adjusting gear 11 ″. However, in the case of FIG. 6, in addition to the ring 18, the second adjusting gear 11 ″ is formed. A gear 11 ″ is provided. In this case, the second adjusting gear 11 ″ is attached to the ring 18 and the bearing 25
The adjustment gear 1 is rotatably mounted via
A 1 ″ gear rim 15 engages a pinion 17 ″, which engages a gear rim 21 fixed to the work spindle 4.

In all embodiments, the motion conversion system 9 has a plurality of tightening screw shafts 26, 26 ', 26 ", which are screw shafts 26, 26', 26" of the work spindle 4. Scattered all around. These tightening screw shafts 26,
26 'and 26 "are arranged so that their axes are parallel and eccentric with respect to the work spindle 4. These tightening screw shafts are mounted so as to be rotatable and axially immovable. The tightening threads 27 ′ of the tightening screw shafts 26, 26 ′, 26 ″ extend within a screw thread receiving portion 27 provided in the output member 10 of the motion conversion system 9. Through the input members 12, 12 ', 12 "of the motion conversion system 9, the tightening screw shaft 26,
26 'and 26 "are drivingly connected in a rotational direction to at least one of the adjusting gears 11' and 11".
Further, the tightening screw shafts 26, 26 ', 26 "are opposed to the adjusting gears 11', 11" drivingly connected to the tightening screw shafts 26, 26 ', 26 ", relative to the work spindle 4. The tightening screw shaft is supported on the work spindle in the circumferential direction of the work spindle 4 so as to rotate around its own axis by the rotation.

In the case of FIGS. 1 and 3, the tightening screw 2
6 is independent of the transmission member 14 causing the reverse coupling of the adjusting gears 11 ', 11 ", and this transmission member 1
It is provided in addition to 4. In contrast, in all other embodiments, the tightening screw shafts 26, 26 ', 26 "
At the same time, is configured and arranged so as to fulfill the functions of both transmission members 14 'and 14 "for connecting the two adjusting gears 11' and 11" in opposite directions.

That is, in the embodiment shown in FIGS.
The tightening screw shaft 26 at the same time forms the central pin 14 ′ which holds the pinion 17 ′ 17 ″. In this case,
In order to operate the motion converting system 9 by braking the adjusting gear 11 ', for example, in the case of FIG. 6, the input member 12' of the motion converting system is formed by the pinion 17 '.
In the case of braking the adjusting gear 11 ″, the input member is formed by the pinion 17 ″.

7 to 12 show almost the same embodiment with respect to the motion conversion system and its operation. In these embodiments, a pair of tightening screw shafts 26 ', 26 ", which are fixedly arranged in the circumferential direction on the work spindle 4, are provided in pairs. In the drawing, two pairs of screw shafts are machined. The tightening screw shafts 26 ′ and 26 ″ are arranged to face each other in the diametrical direction with respect to the main shaft 4.
Has its own pinion 28 ', 28 "as an input member 12', 12". The pinion 28 'of the first tightening screw shaft 26' in each pair of tightening screw shafts engages with the gear rim 15 of one adjusting gear 11 ', and the pinion 28' of the pair of tightening screw shafts The pinion 28 ″ of the second tightening screw shaft 26 ″ engages the gear rim 15 of the other adjusting gear 11 ″. Further, each pair of tightening screw shafts 26 ′, 26 ″ is connected to another pinion connection. They are engaged in opposite directions via the members 14 ", and therefore both clamping screw shafts 26 ', 2
6 "always rotates in the opposite direction. And both tightening screw shafts 2
Since the 6 ', 26 "is connected to the adjusting gears 11', 11" via the pinions 28 ', 28 ", the two tightening screw shafts 26', 26" are fitted with the adjusting gears 11 ', 11 ". The tightening screw shafts 26 ′ and 26 ″ of each tightening screw shaft pair are provided with screw threads 27 ″ whose screw directions are opposite to each other. ′, 26 ″
Rotation in the opposite direction causes the output member 10 to move equally in the axial direction.

10 and 11, a thread receiving portion 27 for the tightening screw shafts 26 'and 26 "is provided in the screw socket 29. This socket 29 is provided in the output member 10. It is possible to rotate between the two stoppers 30 and 30 'with a limit, but it is mounted so as not to move in the axial direction.
When one of the 1's is braked, first the tightening screw shaft 26 ', 26 ", including the screw socket 29, is free to rotate until the screw socket 29 is stopped by the stopper 30, 30'. As a result, the tightening screw shafts 26 ′ and 26 ″ are screwed into the thread receiving portion 27 by the preceding tightening process.
Threaded fit 2 even though it is very fixed inside
The impact action leading to the loosening of the 7, 27 'will be exerted on the threaded engagement 27, 27'.

In all embodiments, the braking device 32 is
For each adjusting gear 11 ′, 11 ″ it is configured as an induction machine acting as a brake, this induction machine having a respective adjusting gear as a rotor and an exciting coil 31 surrounding this adjusting gear. Stator rings 32 ', 32 "
It has and. In the exciting coil 31, the magnitude of the exciting current and the adjustment gears 11 ', 1
It is possible to control the magnitude of the braking moment applied to the 1 ″. In this embodiment, the induction machine is most simply configured as an eddy current brake. A measuring device can be provided for measuring the magnitude of the braking moment applied to the ', 11'. This measuring device consists of stator rings 32 ', 3
Although it is expedient to configure it in relation to the 2 ", it is not shown in detail as to where and how the stator rings 32 ', 32" are arranged in the machine frame, so that the measuring device The configuration is also not shown.

Adjustment gears 11 ', 1 by the braking device 32
1 "braking is only possible when the work spindle 4 is operating,
Enables actuation of the adjusting rod 8. In the embodiment shown in FIG. 13, the tightening device 1 is attached to the head 3 of the work spindle 4 so that it can be closed and opened, that is, tightened and loosened even when the tightening device 1 is stopped. If fixedly connected, the adjusting motor 33 can be fixed. The adjusting motor is movable in the direction of the double-headed arrow 34, so that the driven member 35 of the motor is thereby connected and disconnected in the adjusting gear 11 'in the rotational direction of the adjusting gear 11' when the work spindle 4 is stopped. Can be done. By reversing the rotation direction of the adjusting motor 33, the adjusting rod 8 can be operated in one axial direction or the other axial direction. 36 is an additional connecting member and 37 is a transmission pulley. On the other hand, in all other embodiments, the drives 6, 7 provided for the work spindle 4 are arranged such that the clamping device 1 can be operated even when the device is at rest. Therefore, no additional adjusting motor as in FIG. 13 is required. Therefore, the tightening device itself is a drive device for the work spindle, that is, the drive motor 6 shown in FIGS.
Alternatively, it can be connected to the belt pulley 7 of FIGS. 7 to 12 in the rotational direction. Furthermore, the tightening device 1, which is decoupled in each case, can be fixed so as not to rotate like at least one of the adjusting gears 11 ′ and 11 ″.

In view of the above, in detail, in the embodiment shown in FIGS. 1 and 4, the tightening device 1 is rotatable via the bearing 38 and is immovable in the axial direction so that the work spindle 4 can be fixed. It is attached to the head 3. A connecting device 39 is arranged, and the connecting device 39 non-rotatably connects the tightening device 1 to the work spindle 4 in the illustrated connected state of itself. The connecting device 39 has a connecting member 80, and the connecting member 80 engages with the connecting receiving portion 82 of the tightening device 1 under the action of the connecting spring 81. The connecting member 80 is guided in the head 3 of the work spindle 4 so as to be movable in the axial direction, and can be released from the connected state against the force of the connecting spring 81 by the adjusting piston 83 that can be actuated by air pressure. . A locking member 4 capable of engaging an adjusting rod 8 which is non-rotatably connected to the fastening device 1 for fixing the fastening device 1 when the coupling device 39 is open.
0 works. The member 40 is held in a disconnected state by a connecting spring 84. The lock member 40 is guided in a portion (not shown) of the machine frame so as to be movable in the radial direction with respect to the adjusting rod 8, and an adjusting piston 85 operable by air pressure resists the force of the connecting spring 84 to actuate the adjusting rod. It can be moved into the connection receiving portion 86 at 8. A further locking device 41 is provided which fixes one of the two adjusting gears 11 ', 11 ". The locking device 41 directly engages one of the adjusting gears 11', 11". In the case of the embodiment of FIGS. 4 and 6, the central pin 1
4'or the tightening screw shaft 26 engages the mounting ring 18. The locking device 41 in some cases has a pneumatically actuable adjusting piston 86 '. The piston 86 'moves the lock member 87 in the radial direction toward the work spindle 4. The lock member 87 is movably guided in a portion (not shown) of the machine frame.
The connecting spring 88 holds the lock member 87 in the disengaged state. When the adjusting piston 86 'is actuated, the locking member 8
7 engages an associated lock receiving portion 89 on either the ring 18 or one of the adjusting gears 11 ', 11 ".

The connecting device 39, the lock member 40, and the lock device 41 are all controlled via an air pressure passage communicating with an air pressure source 91, which is schematically shown.

Therefore, the tightening device 1 is uncoupled from the work spindle 4 by the opened connecting device 39 and one of the two adjusting gears 11 ', 11 "or the ring 1 is adjusted.
If, like 8 the rotation is blocked, the clamping device can be turned by the drive of the work spindle 4.
As a result, the motion conversion system 9 correspondingly rotates. This is because, as in FIG. 1, the clamping screw shaft 26 is directly fixed to the work spindle 4 and attached to an extension 42 forming part of this work spindle, or as in FIG. 4 or FIG. , Gear rim 2 fixed to the work spindle 4
This is because it is engaged with the work spindle 4 via 1. In any case, this causes the tightening screw shaft 26 to rotate about its own axis and, as a result, the output member 1
Both 0 and the adjusting rod 8 are actuated axially. The axial movement which occurs in this case can be detected by means of a suitable position indicator, for example indicated by 43 in FIGS. 4 and 6.

In the embodiment shown in FIG. 7, reference numeral 44 designates the entire connecting device, which is axially movable between the tightening device 1 and the work spindle 4.
The connecting portion 4 which is non-rotatably connected to the
Have six. The connecting portion 46 receives the force of the connecting spring 47, and is in a position where it is connected to the work spindle 4 via a hearth type gear cutting 48. FIG. 7 shows a state in which the connection is released. An adjusting member 49 fixed to the machine base by preventing movement of the work spindle 4 in the circumferential direction is connected to the connecting portion 46 by a hydraulic cylinder.
It can be moved forward by the piston device 50. This adjusting member 49 releases the connecting portion 46 from the hearth type gear cutting 48, that is, the connected state in the work spindle 4, against the force of the connecting spring 47, and at the same time, around the axis of the work spindle 4. The adjusting member 49 locks the connecting portion 46 so as not to rotate. For this purpose, the adjusting member 49 has a locking member 51, which engages a corresponding locking receiving part 52 in the connecting part 46. In detail, the connecting part 46 is arranged and guided between the two connecting flanges 53, 54. These flanges 53 and 34 are mounted together so as to be rotatable and immovable in the axial direction. For this purpose, the coupling flange 53 has a bearing ring 55, on which the other coupling flange 54 is guided in a radial and axial direction via rolling bearings 56 and is supported. The connecting portion 46 is guided in contact with one of the connecting flanges 53 so that it cannot rotate and can move in the axial direction.
Is fixed to the tightening device 1, and the other connecting flange 54 is fixed to the work spindle 4. Also in this case, if the tightening device is uncoupled from the work spindle 4 and is fixed so as not to rotate, the locking device 4
1 serves to prevent one of the two adjusting gears 11 ', 11 "from rotating. At that time, when the work spindle 4 is driven, as already mentioned, the tightening which is stopped. The movement conversion system 9 is driven with a corresponding axial movement of the adjusting rod 8 in the device 1.

In FIG. 12, the work spindle 4 is composed of a front spindle portion 4'and a rear spindle portion 4 ", and the front spindle portion 4'holds the fastening device 1 fixed and holds the lathe spindle. The rear spindle part 4 ″, which is mounted in the table, holds the movement system 9 and the drive member 7 for the work spindle 4 in a fixed manner. The rear spindle part is formed by the components 42, 42 '. These parts 42, 42 'are screw 4
It is connected between the two by means of a 2 "and by means of a screw 42""to the belt pulley forming the drive member 7. Both main shaft parts 4 ', 4" are rotatable relative to each other,
They are connected by a connecting device indicated by the whole 57. In this case, when the connecting device 57 is released, the tightening device 1
It is possible to fix the front main spindle portion 4'for holding the shaft so as not to rotate. In detail, a rear main shaft part 4 ″ holding the drive member 7 and the motion conversion system 9 is rotatably mounted on a front part 4 ′ holding the fastening device 1, the front part 4 ′ being It also has a support flange 58. The drive member 7 is fixedly connected to the rear main spindle part 4 ″ which holds the motion conversion system 9, this drive member 7 rolling on said support flange 58. It is guided axially and radially via bearings 59. The front main shaft part 4 ′ holds the connecting member 61 non-rotatably and axially displaceable via a key connection 60. This member 61 comprises a drive member 7 and a rear main shaft part 4 ″.
It is locked so as to be non-rotatably connectable with and not to rotate at the connection release position of itself 61. The connection between the connecting member 61 and the driving member 7 is performed through the connecting gear 62, and the lock for preventing the connecting member 61 from rotating is performed through the connecting gear 63. The upper half of FIG. 12 shows a purely mechanically actuated coupling member with a coupling 65 movable in the direction of the double-headed arrow 64, the lower half of the figure shows an electromagnetically actuatable coupling. The components are shown. In both cases, the connecting member 61 has a connecting spring 66.
Under the action of, the driving member 7 is coupled and engaged. By the operation of the connecting member, the connecting member 61 moves to the right side in FIG. 12 against the force of the connecting spring 66 and engages with the connecting gear 63. As a result, the connecting member 61, and thus the front main spindle part 4 ′ with the clamping device 1, is locked against rotation. It is then possible via the main shaft drive and the drive member 7 to rotate the rear main shaft part 4 ″, which corresponds to a corresponding rotation of the motion conversion system 9 and an intentional rotation of the adjusting rod 8. This leads to a directional movement and, with it, the closing and opening of the clamping device 1, ie the clamping and loosening.

[0036]

The adjusting rod can be tightened and loosened accurately and easily even when the work spindle is rotating.

[Brief description of drawings]

1 is an axial cross-sectional view of a device of the present invention. For the understanding of the present invention, only essential parts are shown and some parts are schematically shown.

FIG. 2 shows an embodiment in which FIG. 1 is slightly modified, and shows a detail of the connecting portion between the output member and the adjusting rod, which is enlarged from FIG.

3 is a side view of the device of FIG. 1 in the direction of arrow II in FIG.

FIG. 4 is a view corresponding to FIG. 1 showing another embodiment of the present invention.

5 is a sectional view taken along line IV-IV in FIG.

6 shows an embodiment with a slight modification of the adjusting gear, showing part of the object of FIG. 4 without the work spindle head and the clamping device.

FIG. 7 shows another embodiment of the device of the present invention, VI-of FIG.
FIG. 6 is a schematic axial cross-sectional view partially along VI.

8 is a plan view of the object of FIG. 7 in the direction of arrow VII of FIG. 7, shown partially in section.

9 is a sectional view taken along line VIII-VIII in FIG.

FIG. 10 shows an embodiment in which a portion indicated by IX in FIGS. 7 and 9 is changed.

11 is a view in the direction of arrow X shown in FIG.
It is a front view of the target of 0.

12 shows another embodiment of the device according to the invention in a view corresponding to FIG.

FIG. 13 is an axial sectional view corresponding to FIGS. 6 and 12, of still another embodiment of the device of the present invention.

[Explanation of symbols]

 1 ……………… Tightening device 2 ……………… Tightening member 3 ……………… Head 4 ……………… Work spindle 4 ′ ………… Spindle part 4 ″ ………… Spindle part 5 ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Member 11 ………… Adjustment gear 12 ………… Input member 12 ′ ………… Input member 12 ″ ………… Input member 13 ………… Connecting device 13 ′ ……… annular flange 13 ″ ………… Thrust Bearing 14 ………… Pinion 14 ′ ………… Center pin 14 ″ ………… Pinion connection member 15 ………… Gear rim 16 ………… Center pin 17 ′ ……… Pinion 17 ″ ………… Pinion 18… ……… Ring 19 ………… Rolling bearing 20 ………… Rolling bearing 21 ………… Gear rim 21 ′ ………… 23 ………… Arrow 24 ………… Arrow 25 ………… Bearing 26 ………… Tightening screw shaft 26 ′ ………… Tightening screw shaft 26 ″ ………… Tightening screw shaft 27 ………… Thread Receiving part 27 '... Tightening screw thread 28' ... Pinion 28 "... Pinion 29 ............ Screw socket 30 ............ Stopper 30 '......... Stopper 31 ………… Excitation coil 32… ............ Braking device 32 '............ Stator ring 32 "………… Stator ring 33 ………… Adjusting motor 34 ………… Bidirectional arrow 35 ………… Follower member 36 ………… Addition Coupling member 37 ………… Transmission pulley 38 ………… Bearing 39 ………… Coupling device 40 ………… Locking member 41 ………… Locking device 42 ………… Extension part (component) 42 ′… …… Components 42 ″ ……… Screws 42 ″ ′ ″… Screws 43… ...... Position 44 ………… Coupling device 45 ………… Key member 46 ………… Coupling part 47 ………… Coupling spring 48 ………… Hearth type gear cutting 49 ………… Adjusting member 50… ………… Cylinder / Piston device 51 ………… Lock member 52 ………… Lock receiving part 53 ………… Coupling flange 54 ………… Coupling flange 55 ………… Bearing ring 56 ………… Rolling bearing 57 ………… Coupling device 58 ………… Supporting flange 59 ………… Rolling bearing 60 ………… Key connection 61 ………… Coupling member 62 ………… Coupling gear 63 ………… Coupling tooth Off 64 ………… Bidirectional arrow 65 ………… Connecting part 66 ………… Connecting spring 80 ………… Connecting member 81 ………… Connecting spring 82 ………… Connecting receiving part 83 ………… Adjustment Piston 84 ………… Connection spring 85 ………… Adjustment piston 6 ………… Connection receiving part 86 ′ ………… Adjustment piston 87 ………… Locking member 88 ………… Connecting spring 89 ………… Lock receiving part 91 ………… Air pressure source 100 ………… Spring element (Cup spring)

Claims (26)

[Claims] 1. A device for producing an adjusting force for a tightening member (2) of a tightening device (1), in particular for adjusting a chuck jaw or a tightening force exerted by this jaw. And a machine spindle (4) of a lathe, which holds the tightening device (1) and can be driven for rotation, and an axially displaceable arrangement within this hollow machine spindle (4) Adjusting rod (8) for actuating the tightening member (2)
And a motion conversion system (9) arranged so as to rotate together with the work spindle (4) (interlocking rotation), and an output member (10) for axially operating the adjusting rod (8). , At least one input member (12, 12 ', 1) rotatably arranged parallel to the work spindle (4)
2 ″) and the input member is drivingly connected to at least one of the two adjusting gears (11 ′, 11 ″), which gears are connected to each other at the work spindle (4). , And a device which is coaxially and rotatably arranged with respect to the work spindle itself and is connected in opposite directions to each other, a braking device (32) is provided, and using this device, Device, characterized in that the adjusting gears (11 ', 11 ") can be braked independently of each other, the magnitude of the braking moment being controllable. 2. The device according to claim 1, wherein between the output member (10) of the motion conversion system (9) and the adjusting rod (8), the two are allowed to rotate freely with respect to each other. Device in which a connecting device (13) movably connected in the direction is inserted. 3. Device according to claim 1 or 2, arranged to rotate together on a work spindle (4) in order to connect both adjusting gears (11 ', 11 ") in opposite directions. At least one transmission member (14, 1)
4 ', 14 "), which are drivingly connected to the adjusting gears (11', 11") and, in the circumferential direction of the work spindle, with respect to the work spindle (4). Device supported on the work spindle (4) such that the relative rotation of the adjusting gear of (1) causes the relative rotation of the other adjusting gear in the opposite direction. 4. The device according to claim 3, wherein the transmission members are one or more interlocking pinions (1).
4) and is formed by this pinion (14)
Are attached to the work spindle (4) and are equipped with gear rims (1 ', 1') respectively provided on the adjusting gears (11 ', 11 ").
5) Device engaged in 5). 5. The device according to claim 3, wherein the transmission member comprises one or a plurality of two pinions (1).
7 ', 17 ") non-rotatably holding the central pin (1
4 '), which center pin is mounted rotatably in a ring (18) which is likewise rotatably arranged on the work spindle (4), in each case the center One pinion (17 ') of the pin (14')
Is attached to one gear rim (15) of the adjusting gear (11 '),
Device, characterized in that the other pinion (17 ″) engages a gear rim (21) fixed to the work spindle (4). 6. Device according to claim 5, characterized in that the second adjusting gear (11 ″) is formed directly by a ring (18) to which the central pin (14 ′) is attached. . 7. The device according to claim 1, wherein the motion conversion system (9) has at least one tightening screw shaft (26, 26 ', 26 "). The attached screw shaft is arranged rotatably and immovably in the axial direction so that the shaft center is parallel to the work spindle (4) and is eccentric, and the tightening screw shaft is tightened by itself. A screw thread (27 ') extends in a screw thread receiving portion (27) provided in the output member (10) of the motion conversion system (9), and further, an input member (12') of the motion conversion system (9). Is drivingly connected to at least one of the adjusting gears (11 ′, 11 ″) in the rotation direction via the, and the tightening screw shaft is a tightening screw shaft (4) in the circumferential direction of the work spindle (4). 26, 2
6 ', 26 ") and an adjusting gear (1
1 ′, 11 ″), the relative rotation of the work spindle (4) is supported by the work spindle (4) so as to cause the rotation of the tightening screw shaft around its own axis. Characterized device. 8. The device according to claim 7, wherein a plurality of tightening screw shafts (26, 26 ′, 26 ″) are provided,
A device characterized in that the tightening screw shaft is distributed around the work spindle (4). 9. The device according to claim 7 or 8, wherein the tightening screw shafts (26, 26 ', 26 ") are provided, in whole or in part, with both adjusting gears (11', 11"). Device for forming transmission members (14 ', 14 ") which are connected to each other in opposite directions. 10. The device according to claim 7, wherein the thread receiving part (27) for the tightening screw shaft (26, 26 ′, 26 ″) has a threaded socket (29). )
The socket (29) is mounted in the output member (10) so as to be rotatable between the two stoppers (30, 30 ') and not axially movable. A device characterized by. 11. The device according to claim 8 or 9, wherein a pair of tightening screw shafts (26 ', 26 ") fixedly arranged in the circumferential direction on the work spindle (4) are provided. , An input member (1) for the motion conversion system (9), respectively.
2 ', 12 ") is provided with a pinion (28', 28"), the first fastening screw shaft (26 ') of the pair of fastening screw shafts having its own pinion (28'). To the gear rim (15) of one adjusting gear (11 '), and the second
The tightening screw shaft (26 ") of its own has its pinion (28") engaged with the gear rim (15) of the other adjusting gear (11 "), and these tightening screw shafts (26 ', 26") ″) Is another one
Two pinion connecting members (14 ″) are engaged in opposite directions and further tightening threads (27 ′) are
A device having opposite screw directions. 12. The device according to claim 2, 5, 6, or 9, wherein the tightening screw shaft (26) is the central pin (1).
4 ') forming device. 13. The device according to claim 1, wherein the braking device is provided for each adjusting gear (1).
1 ', 11'') a friction brake, in particular a shoe brake or an axial (disc) brake with an adjusting gear configured as a brake plate. 14. The device according to claim 1, wherein each adjusting gear (11 ′, 11 ″).
Braking device (32) for act as a brake with an adjusting gear as a rotor and a stator ring (32 ', 32 ") surrounding the adjusting gear and having an excitation coil (31) An apparatus configured as an induction machine, in which the magnitude of an exciting current can be controlled in the exciting coil. 15. Device according to claim 14, characterized in that the induction machine is configured as an eddy current brake. 16. A device according to claim 13, wherein the braking device (32) measures the magnitude of the braking moment applied to the adjusting gears (11 ′, 11 ″). A device having a device. 17. The device according to claim 1, wherein the adjusting motor (3) is fixedly arranged.
3) is provided, and the driven member (35) of this motor is provided.
Is a device capable of connecting and disconnecting in the rotational direction with one of the adjusting gears (11 ', 11 ") in a stopped state of the work spindle (4). 18. The device according to claim 1, wherein the tightening device (1) is a work spindle (4).
Or rotatably connected to the part (4 ″) of the work spindle (4) which holds the motion converting system (9) and the drive member (7) which serves for driving the work spindle. A device characterized by being connectable and disconnectable in the device, and being able to fix the unfastened tightening device (1) and at least one of the adjusting gears (11 ', 11 ") so as not to rotate. . 19. The device according to claim 18, wherein the tightening device (1) is rotatably mounted on the work spindle (4) and provided with a connecting device (39, 44).
The connecting device is characterized in that, in the connected state, the tightening device (1) is non-rotatably connected to the work spindle (4). 20. The device according to claim 19, wherein the fastening device (1) is provided when the connecting device (39) is open.
Locking member (4) adapted to non-rotatably engage an adjusting rod (8) connected to the tightening device (1) in order to fix the
0) is provided. 21. The device according to claim 19, wherein the coupling device (44) is axially movable between the fastening device (1) and the work spindle (4) and the fastening device (1). ) Has a connecting part (46) which is non-rotatably connected to the work spindle (4) under the force of a connecting spring (47). 4) is provided with an adjusting member (49) for blocking the circumferential movement of the connecting member (46), which is advancing relative to the connecting part (46), the adjusting member then connecting spring (47). ) Against the force of the work spindle (4) to release the connecting part (46) from the connected state and at the same time lock it against rotation. 22. Device according to claim 21, characterized in that the connecting part (46) is arranged and guided between two connecting flanges (53, 54), these flanges being rotatable and axial. Are mounted together immovably in one direction, one connecting flange (53) of these flanges being attached to the fastening device (1) and the other connecting flange (5).
4) is an apparatus characterized in that it is fixedly connected to the work spindle (4). 23. The device according to claim 18, wherein the work spindle (4) holds the fastening device (1) in a fixedly held manner, a movement conversion system (9) and a work spindle (4). 4) a drive member (7) and a main shaft portion (4 ″) for fixing and holding the drive member (7), and both relatively rotatable main shaft portions (4 ′, 4 ″) are connected to each other by a coupling device (57). ), The main shaft part (4 ') holding the tightening device (1) being lockable against rotation in the uncoupled state of the coupling device (57). 24. The device according to claim 23, wherein the spindle part (4 ″) holding the drive member (7) for the work spindle (4) and the motion conversion system (9) comprises a fastening device (1). ) Is rotatably mounted on a main shaft portion (4 ') for holding the connecting member (61) so that the main shaft portion (4') is non-rotatable and axially movable. 6
1) is the other main spindle portion (4 ″), especially the drive member (7)
A device that is non-rotatably connectable to the connection member and is locked so that the connection member (61) does not rotate at the connection release position of the connection member (61). 25. The device according to claim 1, wherein the output member (10) of the motion conversion system (9).
A power transmission member is inserted between the output member (10) and the adjustment rod (8) within a predetermined range. Device allowing relative movement, wherein the magnitude of the force transmitted between the two is dependent on the relative travel path between the two. 26. The device according to claim 25, wherein the power transmission member is formed by a spring element (100), which comprises the output member (10) in both axial directions, the adjusting rod (8). ) Is supported on the device.