WO2021074320A1

WO2021074320A1 - Quick clamping device

Info

Publication number: WO2021074320A1
Application number: PCT/EP2020/079092
Authority: WO
Inventors: Dominic GÖLZ
Original assignee: Werner Beiter GmbH & Co. KG
Priority date: 2019-10-17
Filing date: 2020-10-15
Publication date: 2021-04-22
Also published as: DE102019128027A1

Abstract

The invention relates to a quick clamping device having the following features: − a nut (20) with a bore (30), − the bore (30) has a threaded bore (40) with two partial internal threads (42, 44) along a thread longitudinal axis (46) and a displacement bore (50) comprising a displacement bore diameter (52) and running along a displacement axis (54), − the thread longitudinal axis (46) and the displacement axis (54) intersect such that the thread longitudinal axis (46) and the displacement axis (54) form an intersection angle (32), − a bolt (60) with a bolt head (70) and a shaft (80) which is arranged along a bolt longitudinal axis (62) and has an external thread (82) that fits the partial internal threads (42, 44) and has an external thread diameter (84), − the displacement bore diameter (52) is greater than the external thread diameter (84) so that the bolt (60) can be inserted into the bore (30) along the displacement axis (54), and the external thread (82) can be located in the partial internal threads (42, 44) by tilting the bolt (60) and/or the nut (20), − the nut (20) and the bolt (60) are provided on their mutually facing contact faces (24, 72) with contours (22, 74) which can be inserted into each other and rotated.

Description

Tendon tensioning device

The invention relates to a quick release device.

A wide variety of different types of clamping devices are available for frictional and / or positive connection of several components. A type of clamping device that is very frequently used is the screw connection.

The time it takes to assemble a screw connection depends largely on the length of the thread to be screwed in. To speed up and simplify the assembly process with large thread lengths, so-called quick release nuts are known from DE 202005 005 501 U1. Such quick release nuts can be pushed onto the thread by tilting the courage ter against the screw. The nut is tilted back by supporting it on the screw head, for example. By tilting back, the threads of the nut and the screw interlock and the screw connection engages.

DE 19825 132 A1, DE 202018 107 067 Ul and DE 9316 867 Ul are mentioned as further prior art.

The disadvantage of such quick-release nuts is that transverse forces acting on the nut can only be insufficiently absorbed, which can lead to unintentional tilting or displacement of the nut on the screw, especially during the assembly process. Among other things, this results in increased wear on the threads on the nut and screw. In addition, the nut tilts continuously during the assembly process by supporting it on the screw head. The same applies to the dismantling process. For the user, it is not clear at what point the threads of the nut and the screw already interlock to such an extent that the screw connection grips securely.

The invention is therefore based on the object of providing a safe and durable quick release device which can reliably absorb transverse forces acting on the nut. In addition, the quick release device should be easy to manufacture.

The object is achieved according to the invention by a quick release device with the features of claim 1.

Advantageous refinements and developments of the invention are specified in the dependent claims.

A quick release device according to the invention has a courage ter with a bore. The hole has a threaded hole with two partial internal threads along a thread longitudinal axis and a displacement bore with a displacement bore diameter along a displacement axis. The thread longitudinal axis and the displacement axis overlap in such a way that the thread longitudinal axis and the displacement axis span an angle of intersection. A quick release device according to the invention also has a screw with a screw head and a shaft arranged along a screw longitudinal axis, which has an external thread with an external thread diameter that matches the partial internal threads. The Ver sliding bore diameter is larger than the external thread diameter, so that the screw can be inserted into the bore along the axis of displacement and the external thread can be arranged in the internal thread by tilting the screw and / or the nut. The nut and the screw of a quick release device according to the invention are on their zuei- Provided contact surfaces aligned with one another with a contour that can be plugged into one another and rotated.

The hole can be produced by making the threaded hole in the nut. Then the sliding hole can be drilled into the nut. The displacement bore preferably has no thread and a larger diameter than the threaded bore or the external thread. The displacement bore particularly preferably has a smooth surface. As a result, the shaft of the screw can easily be pushed into the sliding hole. The threaded bore and the displacement bore are preferably arranged in the nut in such a way that the intersection of the longitudinal axis of the thread with the displacement axis lies within the volume enclosed by the bore. In the contact surface of the nut, the bore can therefore have a bore opening with an oval cross-section. From the initially related internal thread of the threaded hole, two partial internal threads can arise. The two partial internal threads are preferably not formed contiguously and arranged diagonally opposite one another in the bore egg.

The bore preferably has at least one connection bore with a connection bore diameter. The at least one connection bore can be arranged following at least one of the two partial internal threads along the longitudinal axis of the thread. Particularly preferably, the connecting hole diameter is larger than or equal to the external thread diameter. The connection bore can be designed with or without an internal thread.

The screw can be inserted into the bore with the shaft. The longitudinal axis of the screw preferably lies on the displacement axis. The longitudinal axis of the thread is preferably arranged right to the contact surface of the nut and the screw longitudinal axis perpendicular to the contact surface of the screw, so that when the screw longitudinal axis and the displacement axis lie on top of each other, the nut and screw are tilted relative to one another by the cutting angle. By tilting in the opposite direction by the cutting angle, the longitudinal axis of the screw can be arranged on the longitudinal axis of the thread. Due to the mutual inclination of screw and nut, this tilting usually begins when the mutually facing contact surfaces of screw and nut meet at least partially. With increasing tilting of the longitudinal axis of the screw on the longitudinal axis of the thread, the external thread of the screw can be arranged in the two partial internal threads. As soon as the longitudinal axis of the screw and the longitudinal axis of the thread lie on top of one another, the external thread can be completely angeord net in the partial internal threads. The thread can grasp and the quick release device can be tightened by screwing the screw into the nut.

The longitudinal axis of the screw and the longitudinal axis of the thread are preferably on top of each other when the contours on the mutually facing contact surfaces of the nut and screw are at least partially plugged into one another. The parts of the surface of the screw and the nut that are in direct contact with one another when the quick release device is fully screwed in are referred to as contact surfaces, with the exception of the external thread and the partial internal thread. In a simple embodiment, for example, one contour can have a pin-shaped element and the other contour can have an annular recess. In another exemplary embodiment, one contour can be designed as a polygon, for example as a hexagon, and the other contour can have a cylindrical or circular recess. This can be the case, for example, if the mother is six square nut is formed, or the screw head has an outer hexagon. The screw can also be formed by attaching a second nut to a threaded pin. In this case, the second nut can take over the functions of the screw head.

The contours are preferably designed in such a way that the external thread and the partial internal thread are already arranged in one another before the quick release device is clamped. As a result, the functions of "arranging the external thread and the partial internal thread in one another" and "clamping" can be structurally separated. In this way, the stress and thus also the wear of the thread can be reduced compared to the quick release devices known from the prior art. Due to the contours that can be plugged into one another, transverse forces in particular can be absorbed, especially when clamping and releasing the quick-release clamping device. In addition, a quick release device according to the invention can be particularly safe, since when the quick release device is not clamped but the contour is plugged into one another, the external thread is arranged in the part internal threads and tilting of the screw into the displacement hole is not possible. An unintentional separation of the screw and nut can be avoided. A loss protection can thus be implemented by interlocking contours. Because the contours of the nut and screw can be rotated one inside the other, the nut and screw can be rotated against one another even when the contours are plugged into one another. The quick release device can thus preferably be tightened and released when the contours are plugged into one another, while the screw and nut are particularly preferably secured against loss.

The screw-side contour is preferably arranged on the screw head and can therefore be used as a screw head contour. be drawn. Accordingly, the nut-side contour can be referred to as the nut contour. The screw head contour is preferably arranged on a screw head-side contact surface facing the nut, and the nut contour is preferably arranged on a nut-side contact surface facing the screw head. The screw head contour and the nut contour are particularly preferably designed to be complementary to one another. The nut contour can be designed as a negative image of the screw head contour and vice versa. Due to the complementary design of the nut contour and screw head contour, transverse forces that act at least partially perpendicular to the longitudinal axis of the thread on the nut or screw can usually be transferred particularly well to the other part of the quick release device. In addition, the complementary contours of the screw head and nut can support the tilting of the nut and screw when joining the quick release device. In particular, thanks to the complementary design of the screw head contour and the nut contour, good guidance properties can be achieved when the screw and nut are joined together.

Particularly preferably, the screw head contour and / or the nut contour are designed to be rotationally symmetrical to the longitudinal axis of the screw or to the longitudinal axis of the thread. When screwing in and when tensioning the quick release device, the Tei female thread and the male thread are preferably arranged in one another. Due to a rotationally symmetrical design of the screw head contour and / or the nut contour, high stability can therefore be achieved in particular when screwing in and when tensioning the Schnellspannvor device. In addition, after the screw and nut have been pushed into one another, the sliding axis is often started with the screwing-in movement while it is being tilted. In this case it can Tilting are supported by the rotationally symmetrical formation of screw head contour and / or nut contour.

In one embodiment of the invention, the screw head contour and / or the nut contour have at least one recess and / or at least one projection. A recess is preferably a depression in the surface, in particular in one of the contact surfaces. A jump before can be formed by a correspondingly opposing design of the surface. The at least one recess can also be formed in that part of an upper surface is surrounded by at least one projection. Accordingly, the at least one projection can also be formed in that part of a surface is surrounded by at least one recess.

Particularly preferably, the at least one recess and / or the at least one projection are cylindrical, ring-shaped or conical. A conical design includes, in particular, a frustoconical design of the min least one recess and / or of the at least one protrusion. Due to the conical shape of the at least one recess and / or the at least one projection, the mutual centering of the screw and the nut can be supported when they are pushed into one another and when they are tensioned. The tilting of the longitudinal axis of the screw and the longitudinal axis of the thread can also be facilitated by such an arrangement. The at least one recess and / or the at least one projection preferably have a bevel. In this way, centering and / or tilting can be further facilitated. Cylindrical, annular and conical embodiments of the at least one recess and / or of the min least one projection can be combined with one another. In a development of the invention, the bore is designed as a blind hole. The hole, in particular the threaded hole Ge, is longer than the shaft. The quick release device can be clamped clearly and safely by screwing the external thread into the partial internal thread. In particular, a double fit between screw and nut can be avoided in this way. The displacement bore can be made shorter than the shaft and have a rounding at its rear end. The rounding can guide the shaft at the end of the insertion process and thus support the tilting of the longitudinal axis of the screw and the longitudinal axis of the thread.

The rear end preferably denotes the end of the displacement bore further away from the screw-side contact surface. Accordingly, the partial internal thread can be referred to as a rear partial internal thread and a front partial internal thread. The at least one connection bore is preferably arranged following the rear partial internal thread.

A stabilizer according to the invention for archery has at least one quick release device. Such stabilizers are arranged on a sports bow, in particular to stabilize the position of the bow in the hand. The quick release device is preferably used to place the stabilizer on the sports bow. The screw is particularly preferably arranged on the stabilizer, while the sports bow has the corresponding nut. The sports bow can have a bow interface on which the stabilizer is arranged. Usually one or more stabilizers are arranged on a sports bow. In particular, three stabilizers, namely a monostabilizer and two side stabilizers, can be arranged on a sports arch. In addition, one stabilizer can contain several stabilizer have parts that can be connected to one another with the help of the at least one quick release device.

A tripod according to the invention, in particular for cameras or cameras, has at least one quick-release device. The tripod can have at least one leg, wherein the at least one leg with the at least one Schnellspannvor device can be arranged on the tripod. The at least one leg can also have several leg parts that can be connected to each other with the help of the at least one quick release device. The at least one quick release device is particularly preferably used to connect the tripod to an object that can be arranged thereon, in particular a camera or a camera.

A billiard cue according to the invention has at least one quick-release device. The billiard cue can have several billiard cue parts that can be connected to one another with the aid of the at least one quick release device.

Embodiments of the inventions are explained with reference to the following figures:

It shows:

Figure 1 is a two-dimensional schematic representation of an embodiment of a quick release device in a dismantled state,

Figure 2 is a three-dimensional schematic representation of the embodiment shown in Figure 1 in the state shown in Figure 1,

Figure 3 is a two-dimensional schematic representation of the embodiment shown in Figure 1 in an assembled state, Figure 4 is a three-dimensional schematic representation of the embodiment shown in Figure 1 in the state shown in Figure 3,

Figure 5 is a schematic representation of a sports bow with stabilizers,

FIG. 6 shows a schematic representation of the side stabilizers of the embodiment shown in FIG. 5, and

Figure 7 is a schematic sectional view of a

Quick release device of the side stabilizers shown in FIG.

Figures 1 to 7 show different views of different embodiments. For the sake of clarity, not all reference symbols are used in each figure. The same reference numerals are used for identical and functionally identical parts.

Figure 1 shows an embodiment of a Schnellspannvor device 10 with a nut 20 and a screw 60. In Figure 1, the quick release device 10 is shown in a dismantled state. The nut 20 has a bore 30.

The bore 30 has a threaded bore 40 which is arranged along a thread longitudinal axis 46. In addition, the bore 30 has a displacement bore 50 with a displacement bore diameter 52, which is arranged along a displacement axis 54. The thread longitudinal axis 46 and the displacement axis 54 intersect within the volume encompassed by the nut 20 and span an intersection angle 32. As a result, the threaded bore 40 and the displacement bore 50 are superimposed in the bore 30, so that the threaded bore 40 has two partial internal threads, namely a front part internal thread 42 and a rear partial internal thread 44. As can be seen in particular from Figure 2, these are Their partial internal thread 42 and the rear partial internal thread 44 are not formed contiguously. The bore 30 is designed as a blind hole in the nut 20, so that the bore 30 has only one bore opening 34. Since the thread longitudinal axis 46 and the displacement axis 54 have an angular offset, the bore opening 34 is oval. In this case, that of the two partial internal threads is referred to as the front partial internal thread 42, which is arranged closer to the bore opening 34. Correspondingly, the partial internal thread further removed from the bore opening 34 is referred to as the rear partial internal thread 44. Following the rear partial internal thread 44, a connection bore 48 with a connection bore diameter 49 is arranged along the thread longitudinal axis 46. The connection bore 46 has no internal thread. It can be seen in particular from FIG. 3 that the connection bore diameter 49 is designed to be the same as the external thread diameter 84.

The screw 60 has a shaft 80 arranged along a screw longitudinal axis 62 and a screw head 70. The shaft 80 has an external thread 82 that matches the partial internal threads 42, 44 and has an external thread diameter 84. Since the displacement bore diameter 52 is larger than the external thread diameter 84, so that the shaft 80 can simply be inserted along the displacement axis 54 into the displacement bore 50. During the insertion process, the screw longitudinal axis 62 and the displacement axis 54 are typically on top of one another. Since the thread longitudinal axis 46 is rotated relative to the sliding axis 54 by the cutting angle 32, the screw 60 and the nut 20 are tilted against each other during the insertion process.

The nut 20 can be mounted on the shaft 80 along the displacement axis 54, preferably over a large part of the external thread 82 be postponed. Usually, the nut 20 is pushed onto the shaft 80 until a nut-side contact surface 24 and a screw-head-side contact surface 72 at least partially touch. The parts of the surface of the screw 60 and the nut 20 that are in direct contact with each other when the quick release device 10 is fully screwed in, with the exception of the external thread 82 and the front partial internal thread 42 and the rear partial internal thread 44, are referred to as contact surfaces.

The nut-side contact surface 24 has a nut contour 22, the screw-head-side contact surface 72 has a screw head contour 74. The screw head contour 74 and the nut contour 22 can be plugged into one another and are rotatable. It can be seen in particular from FIG. 2 that the nut contour 22 is cylindrical and the screw head contour 74 has a corresponding cylindrical recess 76. The nut contour 22 and the screw head contour 74 are thus designed to be complementary to one another. The cylindrical nut contour 22 is arranged rotationally symmetrically about the thread longitudinal axis 46, the recess 76 rotationally symmetrically about the screw longitudinal axis 62. As a result, when the nut contour 22 and the screw head contour 74 are plugged into one another, the screw 60 and the nut 20 tilt towards one another, so that the screw longitudinal axis 62 and the thread longitudinal axis 46 come to rest on one another. If the screw longitudinal axis 62 and the displacement axis 54 lie on top of one another during the insertion process, the nut 20 and the screw 60 tilt at the cutting angle 32 when the nut contour 22 and the screw head contour 74 are plugged into one another. This tilting process at the end of the insertion can be supported by a rounding 56 arranged at the end of the sliding bore 50. This is especially this is the case when the length of the sliding bore 50 and the length of the shaft 80 are precisely matched to one another.

By tilting the external thread 82 of the screw 60 and the front partial internal thread 42 and the rear partial internal thread 44 of the nut are arranged one inside the other. The external thread 82 thus engages in the front partial internal thread 42 and the rear partial internal thread 44. Further displacement of the screw 60 and the nut 20 relative to one another is therefore no longer possible. Due to the rotationally symmetrical and mutually complementary design of the nut contour 22 and the screw benkopfkontur 74, the nut 20 and screw 60 can be screwed into each other and the quick release device 10 can be tightened there with.

Even before the quick release device 10 is clamped, the nut contour 22 and the screw head contour 74 intermesh, transverse forces acting perpendicular to the thread axis 46 or screw axis 62 can be transferred to the quick release device via the nut contour 22 and the screw head contour 74 without the danger there is a tilting or shifting of screw and nut to each other.

In particular, by a depth 77 of the recess 76 it can be determined how far the screw 60 and the nut 20 still have to be screwed into one another after the end of the insertion process until the nut-side contact surface 24 and the screw-head-side contact surface 72 are completely in contact with one another. This state, in which the screw 60 and the courage ter 20 are completely screwed into one another, is shown in FIGS. 3 and 4. Starting from this state, the quick release device 10 can be clamped ge by further screwing. It can be seen from FIGS. 3 and 4 that in the completely screwed in state of the quick release device 10, the screw longitudinal axis 62 and the thread longitudinal axis 46 ideally lie on top of one another. The external thread 82 and the front partial internal thread 42 as well as the rear partial internal thread 44 are arranged one inside the other. The screw head contour 74 and the courage ternkontur 22 are plugged into one another.

Due to the cylindrical design of the recess 76 of the screw head contour 74 and the complementary design of the nut contour 22, the screw 60 and the nut 20 can be partially screwed apart without the screw 60 and nut 20 being able to slide and / or tilt relative to one another . How far the screw 60 and the courage ter 20 can be screwed apart without pushing and / or tilting is possible, can be determined in particular by the depth 77 of the recess 76.

It can also be seen from FIGS. 3 and 4 that the threaded bore 40 is longer than the shaft 80. As a result, an effective clamping of the Schnellspannvorrich device 10 can be made possible, in particular since a Doppelpas solution between screw 60 and nut 20 can be avoided.

FIG. 5 shows a sports arch 90 with several stabilizers, namely a monostabilizer 94 and two side stabilizers 92. The monostabilizer 94 and the side stabilizers 92 are arranged on the sports arch 90 via an arch interface 96.

As shown in FIG. 6, in particular the side stabilizers 92 are arranged at the arched interface 96 by means of a quick-release device 10. The side _S tabilisator 92 the screw 60 to the shaft 80 (see Figure 7). The nut 20 is arranged at the arc interface 96. The screw head 70 is integrated into the side stabilizer 92. The screw head contour 74 has a cylindrical recess 76 with the depth 77 and is designed to be complementary to the nut contour 22, which has a corresponding projection 78.

In the illustration shown in FIG. 7, the nut-side contact surface 24 and the screw-head-side contact surface 72 are in contact with one another. The external thread 82 engages in the front partial internal thread 42 and the rear partial internal thread 44. The quick release device 10 is thus completely screwed in. Due to the interlocking of the projection 78 and the recess 76, the shaft 80 cannot be tilted into the sliding bore 50 when the quick release device 10 is loosened by minimal disengagement of the screw 60 and the nut 20. The Außenge thread 82 therefore remains in the front partial internal thread 42 and arranged in the rear partial internal thread 44, whereby the screw 60 together with the side stabilizer 92 is secured against losing. When assembling the screw 60 and the nut 20, the tilting of the screw 60 and the nut 20 zuei nander and with the arrangement of the external thread 82 in the front partial internal thread 42 and the rear partial internal thread 44 are supported by the fact that the projection 78 of the nuts contour 22 and the recess 76 of the screw head contour 74 have a bevel 26. The connection bore 48 has no thread. List of reference symbols

10 tendon 11 tensioning device

20 mother

22 nut contour

24 nut-side contact surface

26 bevel

30 bore

32 cutting angles

34 hole opening

40 threaded hole

42 front partial internal thread

44 rear partial internal thread

46 thread longitudinal axis

48 connection hole

49 Connection hole diameter

50 Displacement bore 52 Displacement bore diameter 54 Displacement axis 56 Rounding 60 Screw 62 Longitudinal screw axis 70 Screw head 72 Contact surface on the screw head side 74 Screw head contour

76 recess

77 depth

78 Protrusion 80 Shank 82 External thread 84 External thread diameter 90 Sports bow 92 Side stabilizer 94 Monostabilizer 96 arc interface

Claims

1.Quick clamping device with the following features:

- a nut (20) with a bore (30),

- the bore (30) has a threaded bore (40) with two partial internal threads (42, 44) along a thread longitudinal axis (46) and a displacement bore (50) with a displacement bore diameter (52) along a displacement axis (54),

- The thread longitudinal axis (46) and the displacement axis

(54) overlap in such a way that the thread longitudinal axis (46) and the displacement axis (54) span an angle of intersection (32),

- A screw (60) with a screw head (70) and a shaft (80) arranged along a screw longitudinal axis (62), which has an external thread (82) with an external thread diameter (84) that matches the partial internal thread (42, 44) ,

- The displacement bore diameter (52) is larger than the external thread diameter (84), so that the screw (60) can be inserted along the displacement axis (54) into the borehole (30) and by tilting the screw (60) and / or the nut (20) the external thread (82) can be arranged in the partial internal threads (42, 44),

- The nut (20) and the screw (60) are on their mutually facing contact surfaces (24, 72) with contours (22, 22,

74) provided.

2. Quick release device according to claim 1, characterized in that a screw head contour (74) on one of the nut (20) facing screw head-side contact surface (72) and a nut contour (22) are formed complementary to one another on a nut-side contact surface (24) facing the screw head (70).

3. Quick release device according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the screw head contour (74) and / or the nut contour (22) are rotationally symmetrical to the screw longitudinal axis (62) or to the thread longitudinal axis (46).

4. Quick clamping device according to one of claims 2 or 3, d a d u r c h g e k e n n z e i c h n e t that the screw head contour (74) and / or the nut contour (22) have at least one recess (76) and / or at least one projection (78).

5. Quick clamping device according to claim 4, d a d u r c h g e k e n n z e i c h n e t that at least one recess (76) and / or at least one projection (78) is cylindrical, ring-shaped or conical.

6. Quick clamping device according to one of the preceding claims, that the bore (30) is designed as a blind hole.

7. Stabilizer for archery with at least one quick release device (10) according to one of the preceding claims.

8. Stand, in particular for cameras or cameras, with at least one quick release device (10) according to one of the preceding claims.

9.Billiard cue with at least one quick release device

(10) according to one of the preceding claims.