JPH0512135U - Roller drive - Google Patents

Abstract

(57) [Summary] [Object] To provide a space-saving roller drive device that prevents the influence of a disturbance factor that hinders stable rotation of a roller and realizes stable rotation of the roller. A first rotating body rotatably supported, and a first rotating body.
And a second rotating body that is supported independently of the rotating body are coaxially arranged, and together form a torque transmitting member.
An annular passage is formed between the boundary surfaces of the first and second rotating bodies, and the transmission fluid is sealed in the annular passage by using a sealing means. Therefore, torque transmission is performed between the first and second rotating bodies via this sealed transmission fluid by the same action as the torque transmission between the pump impeller and the turbine impeller.
One rotating body is slidable with respect to the other rotating body,
Vibration from the outside cannot be transmitted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roller driving device.

[0002]

[Prior Art]

 In various roller applications, care must be taken to ensure stable rotation of the roller. At that time, there is generally a problem that the roller is vibrated by an external force.

In this regard, German Laid-Open Patent Publication DE-A1-3033250 deals with the problem of vibration excitation in the gear drive of rotary shafts and rollers in folding machines. In this case, the cause of the vibrations is that the rims of the folding machine, which are elastically supported in order to adapt to the different thicknesses of the folded sheets, and the gears are not optimally meshed. In order to damp such vibrations, the roller and the rim carried by the roller are drive-coupled by form or frictional engagement. At this time, the damping member is expediently made of a rubber-like elastic material.

A similar mode has been proposed in the case of the gear drive of the ink roller of the inking unit of a rotary printing press according to German Patent DE-C1-3342877. In this case, the corresponding damping means are directly directed at the vibrations due to the periodic shocks transmitted from the ink transfer roller to the ink roller.

The problem of such shock transmitted from the ink transfer roller to the ink roller is further discussed in DE-OS 2303738. However, here the means are not aimed at suppressing the vibration of the ink roller excited by the ink transfer roller, but are intended to isolate the vibration of the ink roller excited by the following roller of the inking unit. Nothing more.

For this purpose, the ink roller, which is excited by the ink transfer roller, is disengaged from the drive means of the succeeding roller and the drive of said ink roller is realized by friction and adhesion with the roller immediately after the inking device. To be done. With this method, however, satisfactory drive of the ink roller is only possible in steady-state operation. In the steady operation state, the circumferential force of the immediately following roller is transmitted to the ink roller through the ink gap between the ink roller and the roller immediately after it, based on the shear force and boundary friction force of the ink gap. You can And for all other operating conditions, additional devices are provided to drive the ink rollers.

[0007]

[Problems to be solved by the device]

 An object of the present invention is to provide a solution different from the prior art with respect to a problem that occurs in the context of roller drive when there is a disturbance factor that hinders stable rotation of the roller.

[0008]

[Means for Solving the Problems]

 In the present invention, the above problems are solved by a roller driving device having the following features.

That is, the first torque transmission member forming the first rotatably supported first rotating body is provided, and the second torque rotatably supported independently of the first rotating body. The second torque transmitting member forming the rotating body is coaxially arranged with the first rotating body, and the first boundary surface provided on the first rotating body and the second rotating body are provided on the second rotating body. An annular path is formed between the first and second sealing members and forms a closed annular chamber between the first and second sealing members, and the first and second sealing members are annular. The annular chambers are slidably arranged with respect to each other and at least one of the two contact surfaces, which determine the length of the chambers; One of the torque transmitting members is connected to the roller body so as not to rotate, and the torque of the other is transmitted. The reaching member is drivingly connected to the driving means.

[0010]

[Action]

 The roller drive for damping the shock and vibration can be realized by the drive means equipped with the Fettinger coupling. In such a coupling, as in the subject of the present invention, the transmission of torque from the first rotary body to the second rotary body is carried out by the transmission fluid. However, the annular chamber filled with this transmission fluid has a relatively complicated structure. The structure has a generally torus outer shape, and has at least one pump impeller and a turbine impeller coaxial with the pump impeller inside. This turbine impeller is rotated by the action of the dynamic pressure of the transmission fluid created by the pump impeller. Such costly couplings may be unsuitable, especially for transmitting relatively small torques, and are often unusable at all due to space considerations due to their relatively large construction. Let's do it. On the other hand, the device of the present invention according to claim 1 exhibits the advantage of a very space-saving structure when just transmitting a relatively small torque.

Another advantage of the present invention is that a slight modification of a conventional roller drive, for example an actuated by a gear train, is required to produce the device according to the present invention. Further, it is convenient that the above-mentioned modification is almost limited to the members originally required for the roller driving by the conventional gear train, for example.

Further, it is obvious that the application of the driving device according to the present invention to an ink kneading roller in which ink is periodically supplied by an ink transfer roller of an inking device of a printing machine is advantageous for the following reasons. is there. This drive makes it possible, as described above, to start up all operating conditions, in particular, for example, a cleaned inking unit, without the need for an additional device for reliably driving the ink kneading roller in such operating conditions. The torque can be transmitted to the above ink kneading roller.

An advantageous construction of the drive device according to the invention is such that one of the two torque transmitting members is arranged coaxially with the roller body, supports one end of the roller body and does not rotate with the roller body. It is a combined rotating shaft, and the other torque transmitting member is a driven wheel that can be driven via a driving means.

In this case, instead of the normally non-rotating connection between the rotary shaft and the driven wheel surrounding the rotary shaft, an annular path is provided between the driven wheel and the rotary shaft, and the driven wheel of this annular path is provided. The annular chamber can be easily realized by closing the side end faces with a suitable sealing means. When the rotating shaft, which is connected to the roller body of the ink kneading roller so as not to rotate, moves toward the driven wheel in the longitudinal direction, as is commonly used in the laterally moving ink kneading roller, the driven wheel is Therefore, it usually has additional bearings fixed to the machine frame, independent of the bearings of the rotary shaft shaft. Therefore, in order to form the driving device according to the present invention, the design preconditions necessary for driving the laterally moving ink kneading roller have almost been satisfied, and as described above, the corresponding conventional driving device can be used. Just fix it.

Another advantageous configuration of the drive device according to the invention is that one of the two torque transmission members is arranged coaxially with the roller body, penetrates at least partially through the roller body, and drives the drive means. It is a rotary shaft that can be driven through, and the other torque transmission member is the roller body itself.

In such a configuration, it is preferable that the roller body of the ink kneading roller is provided as a hollow roller, as is commonly used in the laterally moving ink kneading roller. The hollow roller moves in the longitudinal direction toward a stationary rotation shaft arranged at the center of rotation of the hollow roller.

Another advantageous embodiment has an interface ridge along the region in which at least one of the two rotors is between the first and the second sealing member, the ridge depending on the rotor. It is arranged on the outer circumference of the formed boundary surface, extends substantially in the axial direction of the rotating body, and is formed so as to reduce the cross section of the annular path.

With such a configuration, the torque that can be transmitted can be made larger than that of a configuration having a cylindrical boundary surface, for example.

[0019]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings.

In the embodiment according to FIG. 1, a first torque transmitting member that forms a first rotating body formed by a rotary shaft 1 and a second torque forming member that forms a second rotating body formed by a driven wheel 2. And a torque transmission member. The two rotating bodies are supported so that they can rotate independently of each other. For this purpose, a bearing bush 4 fixed to the wall 3 is provided for the rotary shaft 1. The driven wheel 2 is supported in a bearing casing 6 by a bearing ring 5 which surrounds its hub. The bearing casing 6 itself is fixed to the beam wall 3. In this case, the rotary shaft 1 and the driven wheel 2 have the same axis.

The outer wall surface of the rotary shaft 1 and the outer wall surface of the central hole of the hub of the driven wheel 2 form a first boundary surface 7 and a second boundary surface 8. The two interfaces 7 and 8 surround the ring passage 9. A sealing member 10 is provided at each end of the center hole of the hub of the driven wheel 2 so that the annular passage is sealed with respect to the annular chamber. The length of the annular chamber is determined by the distance between the sealing members 10. At this time, the sealing member 10 is formed so as to be slidable toward at least one of the two boundary surfaces 7 or 8.

The first rotary body configured as the rotary shaft 1 is arranged coaxially with the roller body 11 which is only partially shown, and is connected so as not to rotate with the roller. Supporting one end of.

The second rotating body configured as the driven wheel 2 has external teeth and meshes with the gear 12 supported by the wall 3. The gear 12 is a constituent part of a drive means not specifically shown.

Finally, the annular chamber formed by the annular passage 9 and the two sealing members 10 is filled with the transmission fluid. A highly viscous liquid is particularly suitable as the transmission liquid.

The operation method of such a driving device formed according to the present invention is as follows.

The driven wheel 2, which is rotated by the driving means via the gear 12, exerts a circumferential force on the interface of the liquid column, which is enclosed in the annular chamber and is in contact with this interface, through the interface 8. , Rotate this liquid column. The liquid column rotates the rotary shaft 1 by transmitting the circumferential force to the boundary surface 7 of the rotary shaft 1.

In the case of the configuration shown in FIG. 2, the two boundary surfaces 7 and 8 are each formed as an outer wall surface of a cylinder having a circular cross section. Such a formation requires minimal manufacturing costs.

Another configuration is that at least one of the two rotating bodies has a ridge of the boundary surface 7 or 8 along the area between the two sealing members, which ridge is on the outer circumference of the contact surface 7 or 8. They are arranged, extend substantially in the direction of the axis of rotation of the rotating body, and are formed so as to reduce the cross section of the annular passage 9. This configuration is realized in an extremely various manner according to the configuration example of the illustrated annular passage 9. Such a configuration of the raised portion 13 is most clearly recognized in the portion illustrated in FIG. 7 of the rotary body formed as the rotary shaft shaft 1. Here, for example, a raised portion 13 arranged on a part of the circumference of the rotary shaft 1 is provided as a tooth-shaped projection extending in the longitudinal direction of the rotary shaft 1. However, such tooth-like projections can also be distributed around the perimeter of the boundary surface (in this case boundary surface 8) according to Fig. 3, especially the sealing of the corresponding boundary surface (in this case boundary surface 8) as well. It can extend over most of the length of the area between the members 10.

In other respects, there are no restrictions regarding the formation of the cross section of the ridge 13.

For the special case where the drive according to the invention is used for driving the rollers of an inking device which vibrates in the longitudinal direction, the embodiments of FIGS. 1 and 4 are particularly suitable, as will be explained below. ing.

According to FIG. 1, a rotary shaft shaft 1 whose one end is connected to the roller body 11 so as not to rotate, extends beyond the driven wheel 2 at the other end and has a circumferential groove 14. This circumferential groove can be engaged in a known manner, for example with a roll of a swivel roll lever, not shown, to give the rotary shaft 1 and thereby the roller body 11 vibration in the above-mentioned direction. Due to this vibration, the ridge 13 formed on the boundary surface 7 of the rotating shaft, which extends over only a part of the entire length of the liquid column, moves toward the boundary surface 8 and the liquid column. Since the ridges 13 extend over a short portion of the entire length of the liquid column and these ridges 13 are arranged on the rotary shaft 1, on the one hand, smooth vibration of the rotary shaft 1 is possible, On the other hand, the rotary transmission fluid flows through the space between these raised portions 13 in the longitudinal direction of the rotary shaft 1. In other words, the raised portion 13 causes the liquid column rotated by the driven wheel 2 to flow through in the vertical direction of the rotary shaft shaft 1. As a result, the ridges 13 act in a manner similar to turbine blades, and torque is normally transmitted from the driven wheel 2 via the transmission fluid to the rotary shaft 1 and thus also to the roller body 11 by means of boundary friction and shear forces. To support.

The embodiment according to FIG. 4 has a first torque transmission member forming a first rotating body formed by the rotary shaft 15. On the other hand, the second torque transmission member forming the second rotating body is formed by the roller body 11 'itself to be driven. A bearing bush 4'fixed to the wall 3'with respect to the rotary shaft 15 is provided for coaxially supporting the two rotary bodies so that they can rotate independently of each other. On the other hand, the end of the roller body 11 'facing the wall 3'is rotatably inserted in a bearing bush 16 coaxial with the bearing bush 4', which is also fixed to the wall 3 '. The roller body 11 ′ is partially penetrated by the rotating shaft 15. The first boundary surface 7'is formed by the outer surface of the rotary shaft 15, and the second contact surface 8'is formed by the outer wall surface of the central hole of the roller body 11 'through which the rotary shaft 15 penetrates. The annular passage 9 formed between the first contact surface 7'and the second contact surface 8'is sealed in the annular chamber by a sealing member 10, as in the case of FIG. There is also transmission fluid in this annular chamber.

Unlike the example of FIG. 1, in this case, the rotary shaft 15 is coupled to the drive wheel 17 so as not to rotate. The drive wheel 17 is drivingly connected to a drive means (not shown), and is supported by a bearing bush 6 shown by a broken line as in the embodiment of FIG. 1 in order to reduce vibration.

Similar to the embodiment shown in FIG. 1, also in the embodiment of FIG. 4, the torque introduced to the rotating shaft 15 via the drive wheel 17 causes the two contact surfaces 7'and 8'and the two contact surfaces 7'and 8 ' It is transmitted to the roller body 11 ′ by the boundary frictional force and the shearing force inside the annular chamber formed by the sealing member 10 and filled with the transmission fluid.

According to a variant of the loop 9 shown in FIGS. 2 and 3 of the embodiment according to FIG. 1, a loop 9 modified according to FIGS. 5 and 6 can also be provided in the exemplary embodiment shown in FIG. ..

As described above, the embodiment shown in FIG. 4 is also particularly suitable for the special use case in which the driving device according to the present invention is used to drive the roller vibrating in the longitudinal direction of the inking unit of the printing press. There is. The longitudinal vibration of the roller body 11 ′ is made possible on the one hand by a vertically displaceable support by means of bearing bushes 16 and, on the other hand, by the ridges 13 formed on the contact surface 7 ′ of the rotary shaft 15. This is possible by extending only a small part of the total length of the liquid column that fills the annular chamber. Such ridges 13 act in a manner similar to the pump blades when the roller body 11 'vibrates, and again the torque is normally due to boundary friction and shear forces from the drive wheels 17 via the transfer fluid to the roller body 11'. To be communicated to.

Means for exciting the vibrations are not shown in FIG. 4 at all because they are not included in the subject matter of the present invention. In the example of the arrangement of the roller body 11 'according to FIG. 4, such means can be provided, for example, at the second end of the roller body 11' (not shown).

FIG. 8 shows an example in which the driving device according to the present invention is advantageously incorporated into the roller arrangement of the inking device of the printing machine in cooperation with the plate cylinder 18. In this case, such a drive is provided for the first leveling roller. The leveling roller comes into intermittent contact with the ink transfer roller 19. In FIG. 8, instead of the leveling roller, a driven wheel 2 or a driving wheel 17 which is coaxially engaged with the gear 12 of the driving means is shown.

[Brief description of drawings]

FIG. 1 is a sectional view of a first configuration example of a driving device according to the present invention.

FIG. 2 is a partial cross-sectional view around an annular road in a modified example in which the annular road is changed from FIG.

FIG. 3 is a partial cross-sectional view around an annular road according to still another modified example in which the annular road is changed from FIG.

FIG. 4 is a sectional view of a second configuration example of the driving device according to the present invention.

FIG. 5 is a partial cross-sectional view around an annular road of a second configuration example in which the annular road is changed from FIG.

FIG. 6 is a partial cross-sectional view around an annular road according to still another modified example in which the annular road is changed with respect to FIG.

FIG. 7 is a perspective view of a rotating body having a ridge formed so as to reduce the cross-sectional area of the annular path.

FIG. 8 is a schematic view of a roller system of an inking device of a printing machine equipped with a driving device according to the present invention.

[Explanation of symbols]

 1 rotary shaft shaft 2 driven wheel 3, 3'wall 4, 4'bearing bush 5 bearing ring 6 bearing casing 7, 7'first contact surface 8, 8'second contact surface 9 annular path 10 sealing member 11, 11 'Roller body 12 Gear 13 Protrusion 14 Circumferential groove of rotating shaft 1 Rotating shaft 16 Bearing bush 17 Drive wheel 18 Plate cylinder 19 Ink transfer roller

Claims (4)

[Scope of utility model registration request] 1. A first torque transmission member forming a rotatably supported first rotating body (rotating shaft shaft 1, rotating shaft 15) is provided, and the rotatably and first rotating member is provided. The second torque transmitting member forming the second rotating body (driven wheel 2, roller body 11 ') supported independently of the rotating body (rotating shaft shaft 1, rotating shaft 15) is the first rotating body (rotating shaft). The shaft 1 and the rotary shaft 15) are arranged coaxially with each other, and the first boundary surface (7, 7 ′) provided on the first rotary body (the rotary shaft 1 and the rotary shaft 15) and the second The second boundary surface (8, 8) provided on the rotating body (the driven wheel 2, the rotating portion 11 ').
8 '), an annular passage (9) is formed between the first and second sealing members (10) to form a closed annular chamber, and the first and second sealing members (10) are formed. 10) are arranged at a distance from each other that determines the length of the annular chamber and are slidable with respect to at least one of the two contact surfaces (7, 7'or 8, 8 '), The chamber is filled with transmission fluid, and one of the two torque transmission members is
1 ') is connected so as not to rotate, and the other torque transmission member is drivingly connected to the driving means. 2. One of the two torque transmission members is arranged coaxially with the rotating portion (11), supports one end of the roller body (11), and is coupled to the roller body (11) so as not to rotate. The drive device according to claim 1, wherein the drive shaft is a rotary shaft (1), and the other torque transmission member is a driven wheel (2) that can be driven by a drive means. 3. One of the two torque transmitting members is arranged coaxially with the roller body (11 '),
2. A drive system according to claim 1, wherein the drive shaft is a rotary shaft (15) which at least partially penetrates 1 ') and can be driven by drive means, and the other torque transmission member is the roller body (11') itself. 4. Two rotating bodies (1, 2, 11 ', 15)
At least one of the first and second sealing members (10)
Boundary (7,7 ', 8,8') along the area between
Has a ridge (13) of which the rotator (1,
2, 11 ', 15) formed by the boundary surface (7,
7 ', 8, 8') are arranged on the outer circumference of the rotating body (1, 2,
11. The drive device according to claim 1, wherein the drive device extends substantially in the axial direction of 11 ', 15) and is configured to reduce the cross-sectional area of the annular passage (9).