WO2017089223A1

WO2017089223A1 - System and method for clamping components

Info

Publication number: WO2017089223A1
Application number: PCT/EP2016/078000
Authority: WO
Inventors: Detlef Marten
Original assignee: Sig Technology Ag
Priority date: 2015-11-26
Filing date: 2016-11-17
Publication date: 2017-06-01
Also published as: DE102015120504A1; WO2017089223A9

Abstract

A system (1) for clamping components (2, 3) is illustrated and described, comprising: a connecting element (28) having a thread (6) and having a bushing (9), an eccentrically formed pin (11) with a through-bore (12) having an inside diameter (13), and a screw (14) with a shank (15) having an outside diameter (16), wherein the outside diameter (16) of the shank (15) of the screw (14) is smaller than the inside diameter (13) of the through-bore (12) in the pin (11), and wherein the pin (11) is able to be inserted into the bushing (9) of the connecting element (28). Also illustrated and described is a method for clamping components (2, 3) and the use of the system (1) in an installation for filling foodstuffs into containers.

Description

System and method for clamping components

The invention relates to a system for bracing components, comprising: a threaded fastener with a bushing, an eccentrically shaped bolt with a through bore with a

Inner diameter, and a screw with a shaft with a

Outer diameter, wherein the outer diameter of the shank of the screw is less than the inner diameter of the through hole of the bolt, and wherein the bolt is inserted into the passage of the connecting element. The invention also relates to a method for bracing components, comprising the following steps: a) providing at least two

Connecting components, b) providing at least one connecting element, at least one bolt and at least one screw, c) screwing the

Connecting element in the first component, d) pushing the second component onto the connecting element, e) inserting the bolt into a passage of the

Connecting element, f) inserting the screw into a through hole of the bolt, g) aligning the bolt, and h) screwing the screw into the second component. Numerous systems and methods for clamping components are known in the field of machine elements. One group of these systems and methods uses eccentric components to make the connection. In this kind of

Connections is typically used in both components to be connected in each case a connecting element. Subsequently, the two components to be joined are put together, the two connecting elements interlock. Finally, one of the two connecting elements is rotated, whereby the two components are clamped together. The tension is achieved in that one of the connecting elements designed eccentrically having. This results in that a rotation of the connecting element leads to a contraction of the two components to be connected. such

Connecting elements are used for example in furniture. From EP 2 463 484 AI, for example, a housing for a turbomachine is known. The housing comprises two overlapping parts, which are connected together in the overlapping area by an eccentric pin. The eccentric bolt is pushed through the two overlapping parts and fixed with a nut. Depending on the position of the eccentric bolt, the two parts to be joined are tightened more firmly or less firmly together. In addition, by the position of

Eccentric pin alignment or centering of the two parts can be achieved.

However, a disadvantage of the solution known from EP 2 463 484 A1 lies in the fact that the position of the eccentric bolt can only be adjusted very imprecisely. This is because the eccentric bolt has a thread on which a nut

to be screwed on. The eccentric pin is thus intended to clamp the two components both in the axial direction with one another and also to clamp or align each other in the radial direction. When screwing the nut on the eccentric pin certain torques must be met to achieve desired clamping forces that do not always allow the exact position of

Exzenterbolzens in the bolted state set as arbitrary exactly. In other words, in the creation of screw connections, the torque and not the rotation angle is usually specified as the setpoint value (for example, use of torque wrenches).

DE 20 2014 103 040 Ul shows a slot connector system in the field of furniture construction. The connector system comprises a cylindrical eccentric housing, which is inserted into a milled recess of a first furniture component and which by rotation with a screwed into a second furniture component bolt

tense up. The connector system shown there is intended in particular to enable a twist-proof connection. However, this system also has the disadvantage that the clamping force can not be adjusted continuously. Instead, that can

Connector system between a "holding position" and a "release stop" and are rotated back and forth. In the intermediate positions, however, the connector system can not be fixed and - unlike most screw connections - there is no self-locking.

The invention is therefore based on the object, the above-described and previously explained in more detail system such and further, that at

Bracing of two components a stepless adjustment of the clamping force and a precise alignment of both components is made possible.

This object is achieved by a system for bracing components, comprising: a threaded fastener and with a bushing, an eccentrically shaped bolt with a through hole with a

Inner diameter, and a screw with a shaft with a

Outer diameter, wherein the outer diameter of the shank of the screw is less than the inner diameter of the through hole of the bolt, and wherein the bolt is inserted into the passage of the connecting element. A system according to the invention comprises at least three, preferably four

Components: a connecting element (which can be formed in two parts from a threaded pin and a bushing), an eccentrically shaped bolt and a screw. The connecting element has a thread, which serves to the

Screw connection element in one of the components to be connected. The connecting element also has a passage. The bolt is - at least in a partial area - eccentrically shaped and has a through hole with an inner diameter. The screw finally has a shaft with an outside diameter. Thus, the screw can be pushed into the bolt, the outer diameter of the shank of the screw is smaller or smaller than the inner diameter of the through hole of the bolt. The bolt and that Connecting element are designed such that the bolt can be inserted in at least one rotational position in the implementation of the connecting element.

The system according to the invention has the advantage that a stepless and precise adjustment of the clamping force between the two components can be achieved by a rotation of the bolt. The exact setting of a clamping force may be required, for example, to ensure a reliable sealing effect. The possibility of a stepless and precise adjustability of the clamping force is due to the fact that the bolt is not screwed into one of the components itself, but is fixed to the component via a screw which is inserted through the passage bore of the bolt. Accordingly, a rotation of the bolt - unlike bolted bolts - no axial displacement of the bolt result. This has the advantage that the bolt can first be rotated to a desired position and then - by tightening the screw - can be fixed in this position. When tightening the screw but the bolt is clamped exclusively in the axial direction with one of the components; an undesired twisting of the bolt does not occur when tightening the screw. The invention is therefore based on the principle of a separation of functions: The bolt has the function of adjusting the distance (and thus the clamping force) between the two components to be clamped by rotation of the bolt. The screw, however, has the

Function to axially clamp the bolt without twisting it. This has the advantage that the bolt does not have to hold its own rotary position, but can be rotated to any position and can be fixed by another component (the screw) in this position.

According to a development of the system, it is proposed that the

Connecting element is designed in two parts. Preferably, the two parts of the connecting element are movable relative to each other. The two-part design of the connecting element has the advantage that the implementation of the

Can be aligned without this in one of the connection element connecting components screwed thread of the connecting element must be rotated.

For this development, it is further proposed that the connecting element is formed from a threaded pin and a socket, wherein the thread is provided on the threaded pin and wherein the passage is provided in the socket. The use of a threaded pin and a socket have the advantage that the socket - for example by an internal thread - can be screwed to the threaded pin, whereby both parts can be rotated relative to each other. This allows a precise alignment of the bushing. In particular, the socket seated on the threaded pin can be aligned or held in the aligned position while the threaded pin is screwed into one of the components to be connected. According to one embodiment of the system, it is provided that the passage of the connecting element extends in the radial direction of the connecting element. The radial extent of the implementation has the consequence that the bolt can be pushed transversely through the connecting element. A rotation of the bolt therefore causes a displacement of the connecting element (for example, the bushing and the

Grub screw) along its longitudinal axis (ie in the axial direction).

A further embodiment of the system provides that the through hole of the bolt extends in the axial direction of the bolt. Due to the axial course of the through hole, a fastening means - for example a screw - can be pushed through the bolt and clamp or fix the bolt in the axial direction.

In a further embodiment of the system, it is provided that the thread of the

Threaded an external thread is that on the socket an internal thread is provided, and that the external thread and the internal thread are matched. The external thread of the threaded pin can serve on the one hand screw the grub screw into the component and on the other hand can be used for a screw with the socket. For this purpose is on the socket

Internal thread provided that in terms of relevant parameters

(Diameter, pitch, etc.) is matched to the external thread of the threaded pin.

According to a further embodiment of the system it is provided that the bush has at least two oppositely arranged and mutually parallel recesses. The recesses can, for example, a

Spanner serve as attack surface. This has the advantage that the socket can be held by the open-end wrench in its desired rotational position, while the set screw - to which the socket is screwed - is screwed into the component. According to a further embodiment of the system, it is provided that the threaded pin has an inwardly directed carrier profile, in particular a hexagon socket. Preferably, the entrainment profile at one of the ends of the

Threaded pin arranged. An internal driving profile at one end of the threaded pin has the advantage that a tool from the axial direction in the

Gripping profile can engage while another component (such as the socket) is screwed onto the threaded pin. This facilitates screwing in the

Threaded pin in a component, with simultaneous alignment of the socket.

In a further embodiment of the system, it is proposed that the screw has an inwardly directed carrier profile, in particular a hexagon socket. Also in the case of the screw, the driving profile is preferably arranged at one of the ends of the screw, for example on the screw head. An internal driving profile on the screw head has the advantage that a tool from the axial direction can engage in the driving profile, while the screw is plugged into another component (eg the bolt). This is made possible in particular by the fact that the screw head at an internal driving profile on its outer surface can be cylindrically shaped. The screw head can therefore also be achieved from the axial direction by a tool, if it is hidden from the radial direction by another component (eg the bolt). A further embodiment of the system finally provides that the bolt has an outwardly directed carrier profile, in particular an external hexagon. Preferably, the driving profile is arranged at one of the ends of the bolt. An external driving profile at one end of the bolt has the advantage that a tool from the radial direction can engage the driving profile, while another component (eg the screw) is inserted into the bolt. This allows the bolt to be held in the desired rotational position while the bolt inserted through the bolt is screwed into the component.

The system described above is particularly well suited for use in a plant for filling in all described embodiments

Food. The filling of foodstuffs is mostly done on high-speed machines that are large (e.g., due to cyclical operation)

Are exposed to vibrations. This requirement is satisfied by the connection system by a firm cohesion of the components to be connected. In addition, aseptic conditions must often be observed when filling food. By a precise adjustment of the clamping force, the connection system can also meet this requirement. Because between the components to be connected usually a seal is arranged, which works optimally only in a certain clamping force range.

The object described above is also achieved by a method for

Bracing of components, comprising the following steps: a) providing at least two components to be connected, b) providing at least one connecting element, at least one bolt and at least one screw, c) screwing the connecting element into the first component, d) sliding on the second component On the connecting element, e) inserting the bolt in one Passage of the connecting element, f) insertion of the screw in one

Through hole of the bolt, g) Aligning the bolt, and h) Screwing the screw into the second component. The method according to the invention utilizes the properties of the components of the system presented above and achieves the same advantages. In particular, a stepless and precise adjustment of the clamping force between the two components can be achieved by a rotation of the bolt. This is mainly due to the fact that the eccentrically shaped bolt is not screwed into one of the components, but is fixed by a screw which is inserted through the through hole of the bolt to the component. In this way, the bolt can be clamped during its fixation exclusively in the axial direction, without having to leave the desired rotational position. The components that are strained by the process may, for example, be components of a facility for filling foodstuffs.

The above-described steps a) to h) can proceed in the stated order or in a different order. For example, the alignment of the bolt (step g) could take place at different points in time: The bolt can be aligned before, during or after the insertion of the bolt through the through hole of the bolt (step f). An orientation of the bolt can even during the screwing of the screw into the second component (step h) take place, at least as long as the tension of the bolt permits. According to one embodiment of the method, it is finally provided that a (single or preferably two-part) connecting element and / or a bolt and / or a screw according to one of claims 1 to 10 is used. The components of the system described above can be found in all of the above

Embodiments are used for the claimed method. The resulting benefits have been previously associated with the

corresponding properties of the components explained in more detail. The invention will be explained in more detail with reference to a drawing showing only a preferred embodiment. In the drawing show:

Fig. 1: an inventive system for clamping of components in

assembled state in a cut view,

2 shows a first step of a method according to the invention for

Clamping of components in a cut view,

3 shows a second step of a method according to the invention for

Clamping of components in a sectional view, and Fig. 4: a third step of a method according to the invention for

Clamping components in a cut view.

1 shows an inventive system 1 for clamping components in the assembled state in a sectional view. Through the system 1, a first component 2 is connected to a second component 3, wherein a seal 4 is provided between the two components 2, 3. The components 2, 3 may in particular be metallic components 2, 3. The system 1 comprises a threaded pin 5 with an external thread 6 and a socket 7 with a

The threaded pin 5 and the socket 7 together form a connecting element 28. The bushing 9 extends in the radial direction of the bush 7. The bush 7 is screwed with its internal thread 8 on the external thread 6 of the threaded pin 5; the two threads 6, 8 are therefore coordinated. The threaded pin 5 is screwed with its external thread 6 in a bore 10 which is provided in the first component 2 for this purpose. The threaded pin 5 could also be replaced by a screw, if in the Socket 7 enough space for the screw head is present (eg by a paragraph).

The system 1 shown in Fig. 1 further comprises an eccentrically shaped pin 11 having a through hole 12 with an inner diameter 13 and a screw 14 with a shaft 15 having an outer diameter 16. Die

Through hole 12 extends in the axial direction of the bolt 11. The bolt 11 is inserted into the passage 9 of the bush 7 and the screw 14 is inserted into the through hole 12 of the bolt 11. In addition, the screw 14 is screwed into a bore 17 which is provided in the second component 3 for this purpose.

In the first component 2, a recess 18 is provided in addition to the bore 10, which receives a portion of the socket 7. In the second component 3 a plurality of recesses 19 are provided; a first recess 19 'receives the protruding from the first component 2 socket 7 and a second recess 19 "and a third recess 19' 'serve the bolt 11 as bearings. Further

Features and their characteristics of the system 1 are explained below with reference to FIGS. 2 to 4, although not all components of the system 1 are shown there in part.

FIG. 2 shows a first step of a method according to the invention for clamping components in a sectional view. The view shown in FIG. 2 corresponds to the viewing direction shown in FIG. 1 by an arrow II. The areas of the system 1 already described in connection with FIG. 1 are provided with corresponding reference numerals in FIG. First, the sleeve 7 is screwed with its internal thread 8 on the external thread 6 of the threaded pin 5. In one (not shown in FIG. 2) one-piece connecting element 28, this step can be omitted. Subsequently, the threaded pin 5 is screwed into the bore 10 of the first component 2. This can be done via a provided in the threaded pin 5 hexagon socket 20, which is provided by an opening provided in the socket 7 21st can be achieved by a tool. While the threaded pin 5 is screwed into the bore 10 of the first component 2, the bushing 7 can be aligned or held in an already aligned rotational position. For this purpose, at least two oppositely arranged and mutually parallel recesses 22 are provided on the bushing 7. The recesses 22 can serve as an attack surface, for example, an open-end wrench. At the

Screwing the threaded pin 5 in the hole 10 so it can be a

Relative movement between the threaded pin 5 and the screwed-on socket 7 come. In one (not shown in Fig. 2) one-piece

Connecting element 28, the alignment of the bushing 9 by a

Changing the screw-in depth of the connecting element 28 or by providing (preferably elastic) spacers such as washers or sealing rings. In Fig. 2 it can be clearly seen that the passage 9 of the bushing 7 does not necessarily have to be round, but may also be oval or angular.

Fig. 3 shows a second step of a method according to the invention for

Clamping components in a cut view. The view shown in Fig. 3 corresponds to the view shown in Fig. 1 (rotated by 90 ° relative to the view in Fig. 2). The areas of the system 1 already described in connection with FIG. 1 or FIG. 2 are provided with corresponding reference symbols in FIG. 3. In contrast to the step described above, in the state shown in FIG. 3, the second component 3 has already been pushed onto the bush 7. This is made possible by a recess 19 ', which is formed in the second component 3 and which receives the bushing 7 in itself. The two components 2, 3 are separated from each other in this state only by the seal 4 and spaced. As a result of the previously performed alignment of the leadthrough 9 of the bush 7, the bushing 9 extends parallel to the longitudinal axis of the bore 17 provided in the second component 3.

Finally, FIG. 4 shows a third step of a method according to the invention for clamping components in a sectional view. The view shown in Fig. 4 again corresponds to the view shown in Fig. 1. Also in Fig. 4, the areas of the system 1 already described in connection with FIGS. 1 to 3 are provided with corresponding reference symbols. In contrast to the steps described above, in the state shown in Fig. 4, the pin 11 is inserted into the passage 9 of the bush 7. The bolt 11 has two cylindrical areas, which sit in the two likewise cylindrically shaped recesses 19 ", 19"'of the second component 3. Between the two cylindrical areas, the pin 11 has an eccentrically shaped area. The bolt 11 has a central axis 23 which is parallel to the axis 24 of the bore 17 (and the recesses 19 ", 19"') and due to the eccentric shape of the bolt 11 in each rotational position of the bolt 11 adjacent to the axis 24 of the bore 17th (and the

Recesses 19 ", 19" ') is located. The central axis 23 of the bolt 11 is also adjacent to the axis of the through hole 12, which in each rotational position of the bolt 11 on the axis of the bore 24 24 (and the recesses 19 ", 19" '). Between the central axis 23 of the bolt 11 and the axis of the bore 17 (and the recesses 19 ", 19" ') an offset is formed, which is also referred to as "eccentricity" 25. The eccentricity 25 of the bolt 11 depends on its diameter and The smaller the eccentricity 25, the finer is the tension that can be generated thereby, adjustable in the screw sizes frequently used in connection with equipment for filling foodstuffs (between M6 and M12). For example, the eccentricity is preferably in a range of 0.3 mm to 7.0 mm, more preferably in the range of 0.5 mm to 4.0 mm, and the bolt 11 can be rotated in the recesses 19 ", 19", for which purpose the bolt 11 has an external hexagon 26 to which a tool can engage, and by rotating the bolt 11, the position of the bushing 7 can be changed, whereby the distance between the two construction divide 2, 3 can be changed. In particular, by a

Rotation of the bolt 11, the contact force between the two components 2, 3 are changed and adjusted. In each rotational position of the bolt 11, the position of the through hole 12 of the bolt 11 remains identical, so that the screw 14 can be inserted into the through hole 12 of the bolt 11 in each rotational position of the bolt 11 and can be screwed to the bore 17 of the second component 3 , By tightening the screw 14, the set rotational position of the bolt 11 - and thus also the rotational position corresponding contact force between the components 2, 3 - are fixed. The screw 14 has a hexagon socket 27 for tightening. This has the advantage that in the screwed state at the same time tools on the

Hexagon 26 of the bolt 11 and the hexagon socket 27 of the screw 14 can attack. After screwing the screw 14 into the bore 17, the state shown in Fig. 1 results.

LIST OF REFERENCE NUMBERS

1: System for clamping components

2: first component

3: second component

4: seal

5: Grub screw

6: external thread (of the threaded pin 5)

7: socket

8: internal thread (the socket 7)

9: bushing (bushing 7)

10: hole (in the first component 2)

11: bolts

12: through hole (pin 11)

13: Inner diameter (the through hole 12)

14: screw

15: shaft (the screw 14)

16: outer diameter (of the shaft 15)

17: hole (in the second component 3)

18: recess (in the first component 2)

19, 19 ', 19 ", 19"': recess (in the second component 3)

20: hexagon socket (of threaded pin 5)

21: opening (the socket 7)

22: recess (the socket 7)

23: center axis (of the bolt 11)

24: axis (the bore 17 and the recesses 19 ", 19" ')

25: eccentricity (pin 11)

26: external hex (bolt 11)

27: hexagon socket (the screw 14)

28: connecting element

Claims

claims

System (1) for clamping components (2, 3), comprising:

- A connecting element (28) with a thread (6) and with a

Implementation (9),

- An eccentrically shaped bolt (11) having a through bore (12) with an inner diameter (13), and

a screw (14) having a shaft (15) with an outside diameter (16),

- wherein the outer diameter (16) of the shank (15) of the screw (14)

is smaller than the inner diameter (13) of the through hole (12) of the bolt (11), and

- Wherein the bolt (11) in the passage (9) of the connecting element (28) can be inserted.

System according to claim 1,

characterized in that

the connecting element (28) is designed in two parts.

System according to claim 1 or claim 2,

characterized in that

the connecting element (28) is formed from a threaded pin (5) and from a bushing (7), wherein the thread (6) is provided on the threaded pin (5) and wherein the bushing (9) is provided in the bushing (7) ,

System according to one of claims 1 to 3,

characterized in that

the passage (9) of the connecting element (28) extends in the radial direction of the connecting element (28).

5. System according to one of claims 1 to 4,

characterized in that

the through hole (12) of the bolt (11) extends in the axial direction of the bolt (11).

6. System according to one of claims 3 to 5,

characterized in that

the thread (6) of the threaded pin (5) is an external thread (6), that an internal thread (8) is provided on the bush (7), and that the external thread (6) and the internal thread (8) are matched to one another.

7. System according to one of claims 3 to 6,

characterized in that

the bush (7) has at least two recesses (22) arranged opposite one another and running parallel to one another.

8. System according to one of claims 3 to 7,

characterized in that

the threaded pin (5) has an inwardly directed carrier profile, in particular a hexagon socket (20).

9. System according to one of claims 1 to 8,

characterized in that

the screw (14) has an inwardly directed driving profile, in particular a hexagon socket (27).

10. System according to one of claims 1 to 9,

characterized in that

the bolt (11) has an outwardly directed carrier profile, in particular an external hexagon (26).

11. Use of a system (1) according to any one of claims 1 to 10 in a plant for filling food.

12. A method of clamping components (2, 3), comprising the following

Steps:

a) providing at least two components (2, 3) to be connected, b) providing at least one connecting element (28), at least one bolt (11) and at least one screw (14),

c) screwing the connecting element (28) into the first component (2), d) sliding the second component (3) onto the connecting element (28), e) inserting the bolt (11) into a passage (9) of the

Connecting element (28),

f) inserting the screw (14) in a through hole (12) of the bolt g) aligning the bolt (11), and

h) screwing the screw (14) in the second component (3).

13. The method according to claim 12,

characterized in that

a connecting element (28) and / or a bolt (11) and / or a screw (14) according to one of claims 1 to 10 is used.

14. The method according to claim 12 or claim 13,

characterized in that

a two-part, in particular one consisting of a threaded pin (5) and a bushing (7) connecting element (28) is used.