Quick-release device, stabilizer for archery, tripod and billiard cue

Abstract

Quick-release clamping device (10) 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 sliding bore (50) with a sliding bore diameter (52) along a sliding axis (54), - the longitudinal axis of the thread (46) and the displacement axis (54) intersect in such a way that the longitudinal axis of the thread (46) and the displacement axis (54) form an angle of intersection (32), - a screw (60) with a screw head (70) and a shaft (80) arranged along a longitudinal axis (62) of the screw, which has an external thread (82) matching the partial internal threads (42, 44) with an external thread diameter (84), - the displacement bore diameter (52) is larger than the external thread diameter (84), so that the screw (60) can be inserted into the bore (30) along the displacement axis (54) and the external thread (82) can be arranged in the partial internal threads (42, 44) by tilting the screw (60) and / or the nut (20). - the nut (20) and the screw (60) are provided on their mutually directed contact surfaces (24, 72) with interlocking and rotatable contours (22, 74), wherein a screw head contour (74) on a screw head-side contact surface (72) facing the nut (20) and a nut contour (22) on a nut-side contact surface (24) facing the screw head (70) are formed complementarily to each other.

Description

[0001] The invention relates to a quick-release device, a stabilizer for archery, a tripod and a billiard cue.

[0002] A wide variety of clamping devices are available for friction-fit and / or form-fit connections of multiple components. A very commonly used type of clamping device is the bolted connection.

[0003] The time required to assemble a bolted connection depends significantly on the length of the thread being screwed in. To accelerate and simplify the assembly process for long threads, so-called quick-release nuts are known from DE 20 2005 005 501 U1. These quick-release nuts can be pushed onto the thread by tilting the nut against the bolt. By supporting the nut, for example against the bolt head, it is tilted back. This tilting action causes the threads of the nut and bolt to engage, thus securing the bolted connection.

[0004] Further prior art is cited as DE 198 25 132 A1, DE 20 2018 107 067 U1, DE 93 16 867 U1, WO 98 / 18 185 A1, US 2005 / 0 186 049 A1, US 3 878 757 A, EP 1 205 676 B1 and US 6 176 665 B1.

[0005] A disadvantage of such quick-release nuts is that they are insufficiently able to absorb lateral forces acting on the nut, which can lead to unintentional tilting or shifting of the nut on the bolt, particularly during assembly. This results, among other things, in increased wear of the threads on both the nut and the bolt. Furthermore, the nut tilts continuously during assembly due to its resistance against the bolt head. The same applies to disassembly. Therefore, it is not readily apparent to the user at what point the threads of the nut and bolt have engaged sufficiently to ensure a secure connection.

[0006] The invention therefore aims to provide a safe and durable quick-release clamping device that can reliably absorb lateral forces acting on the nut. Furthermore, the quick-release clamping device should be easy to manufacture.

[0007] The problem is solved according to the invention by a quick-release clamping device with the features of claim 1.

[0008] Advantageous embodiments and further developments of the invention are specified in the dependent claims.

[0009] A quick-release clamping device according to the invention comprises a nut with a bore. The bore has a threaded bore with two partial internal threads along a longitudinal thread axis and a sliding bore with a sliding bore diameter along a sliding axis. The longitudinal thread axis and the sliding axis intersect such that they form an angle of intersection. A quick-release clamping device according to the invention also comprises a screw with a screw head and a shank arranged along a longitudinal screw axis, which has an external thread with a diameter matching the partial internal threads. The sliding bore diameter is larger than the external thread diameter, so that the screw can be inserted into the bore along the sliding axis and the external thread can be aligned with the partial internal threads by tilting the screw and / or the nut.The nut and screw of a quick-release clamping device according to the invention are provided on their mutually facing contact surfaces with an interlocking and rotatable contour.

[0010] The bore can be created by drilling a threaded hole into the nut. Subsequently, a sliding bore can be drilled into the nut. Preferably, the sliding bore is unthreaded and has a larger diameter than the threaded hole or the external thread. Particularly preferably, the sliding bore has a smooth surface. This allows the screw shank to be easily inserted into the sliding bore. The threaded hole and the sliding bore are preferably arranged in the nut such that the intersection of the thread's longitudinal axis with the sliding axis lies within the volume enclosed by the bore. Therefore, the bore in the nut's contact surface can have an opening with an oval cross-section. This allows two partial internal threads to be created from the initially continuous internal thread of the threaded hole.The two partial internal threads are preferably not interconnected and are arranged diagonally opposite each other in the bore.

[0011] Preferably, the bore has at least one connecting bore with a defined diameter. This connecting bore can be arranged along the longitudinal axis of the thread following at least one of the two partial internal threads. It is particularly preferred that the connecting bore diameter is larger than or equal to the external thread diameter. The connecting bore can be configured with or without an internal thread.

[0012] The screw can be inserted into the bore with its shank. Preferably, the longitudinal axis of the screw lies on the axis of displacement. Preferably, the longitudinal axis of the thread is perpendicular to the bearing surface of the nut, and the longitudinal axis of the screw is perpendicular to the bearing surface of the screw, so that when the longitudinal axis of the screw and the axis of displacement coincide, the nut and screw are tilted relative to each other by the angle of intersection. By tilting them in the opposite direction by the angle of intersection, the longitudinal axis of the screw can be aligned with the longitudinal axis of the thread. Due to the relative misalignment of the screw and nut, this tilting typically begins when the opposing bearing surfaces of the screw and nut at least partially meet. As the longitudinal axis of the screw tilts further towards the longitudinal axis of the thread, the external thread of the screw can be aligned with the two partial internal threads.Once the screw's longitudinal axis and the thread's longitudinal axes are aligned, the external thread can be fully engaged in the partial internal threads. The thread can then engage, and by screwing the screw into the nut, the quick-release device can be tightened.

[0013] The longitudinal axis of the screw and the longitudinal axis of the thread preferably coincide when the contours on the mutually facing contact surfaces of the nut and screw are at least partially interlocked. Contact surfaces are defined as those parts of the surface of the screw and the nut that are in direct contact with each other when the quick-release device is fully tightened, with the exception of the external thread and the partial internal threads. In a simple embodiment, for example, one contour may have a pin-shaped element and the other contour an annular recess. In another embodiment, one contour may be a polygon, for example a hexagon, and the other contour may have a cylindrical or annular recess. This may be the case, for example, if the nut is designed as a hexagonal nut or if the screw head has an external hexagon.The screw can also be formed by placing a second nut onto a threaded stud. In this case, the second nut can take over the functions of the screw head.

[0014] Preferably, the contours are designed such that the external thread and the partial internal threads are already aligned within each other before the quick-release clamping device is tightened. This allows the functions of "aligning the external thread and the partial internal threads within each other" and "tightening" to be structurally separated. This reduces the stress and thus also the wear of the thread compared to quick-release clamping devices known from the prior art. The interlocking contours allow transverse forces, especially during tightening and loosening of the quick-release clamping device, to be absorbed. Furthermore, a quick-release clamping device according to the invention can be particularly safe because, when the quick-release clamping device is not tightened but the interlocking contours are aligned within each other, the external thread is aligned within the partial internal threads, preventing the screw from tilting into the sliding bore.This prevents the screw and nut from unintentionally separating. The interlocking contours create a locking mechanism to prevent loss. Because the contours of the nut and screw are rotatable within each other, they can still be twisted relative to one another even when the contours are interlocked. The quick-release device can therefore preferably be tightened and loosened with the contours interlocked, while the screw and nut are preferably secured against loss.

[0015] Preferably, the screw-side contour is arranged on the screw head and can therefore be referred to as the screw head contour. Accordingly, the nut-side contour can be referred to as the nut contour. According to the invention, the screw head contour is arranged on a screw-head-side contact surface facing the nut, and the nut contour is arranged on a nut-side contact surface facing the screw head. The screw head contour and the nut contour are complementary to each other. 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, which act at least partially perpendicular to the longitudinal axis of the thread on the nut or the screw, can typically be transmitted particularly well to the respective other part of the quick-release clamping device.Furthermore, the complementary contours of the screw head and nut can facilitate the tilting of the nut and screw during assembly of the quick-release clamping device. In particular, the complementary design of the screw head contour and nut contour can achieve good guiding properties when assembling the screw and nut.

[0016] Preferably, the screw head contour and / or the nut contour are designed to be rotationally symmetrical about the longitudinal axis of the screw or the longitudinal axis of the thread, respectively. When screwing in and tightening the quick-release clamping device, the partial internal threads and the external thread are preferably arranged within each other. A rotationally symmetrical design of the screw head contour and / or the nut contour therefore allows for high stability, particularly during screwing in and tightening of the quick-release clamping device. Furthermore, after the screw and nut have been slid together along the axis of movement, the screwing motion is often initiated while the clamp is still tilting. In this case, the tilting motion can be facilitated by the rotationally symmetrical design of the screw head contour and / or nut contour.

[0017] 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, particularly in one of the contact surfaces. A projection can be formed by a correspondingly contrasting surface configuration. The at least one recess can also be formed by surrounding a portion of a surface with at least one projection. Similarly, the at least one projection can also be formed by surrounding a portion of a surface with at least one recess.

[0018] The at least one recess and / or the at least one projection are preferably cylindrical, annular, or conical. A conical design particularly includes a frustoconical shape of the at least one recess and / or the at least one projection. The conical shape of the at least one recess and / or the at least one projection facilitates the mutual centering of the screw and nut during insertion and tightening. Such an arrangement also facilitates the tilting of the screw's longitudinal axis and the thread's longitudinal axis. Preferably, the at least one recess and / or the at least one projection has a chamfer. This further facilitates centering and / or tilting.Cylindrical, ring-shaped and conical embodiments of the at least one recess and / or the at least one projection can be combined with each other.

[0019] In a further development of the invention, the bore is designed as a blind hole. The bore, and in particular the threaded bore, is longer than the shank. This allows the quick-release clamping device to be tightened unambiguously and securely by screwing the external thread into the partial internal threads. In particular, this avoids a double fit between the screw and nut. The sliding bore can be shorter than the shank and have a radius at its rear end. At the end of the insertion process, this radius can guide the shank, thus facilitating the tilting of the screw's longitudinal axis and the thread's longitudinal axis. The rear end preferably refers to the end of the sliding bore furthest from the screw-side contact surface. Accordingly, the partial internal threads can be referred to as the rear partial internal thread and the front partial internal thread.Preferably, at least one connecting bore is arranged following the rear partial internal thread.

[0020] An archery stabilizer according to the invention comprises at least one quick-release mechanism. Such stabilizers are attached to a sports bow, particularly to stabilize the bow's position in the hand. The quick-release mechanism is preferably used to attach the stabilizer to the sports bow. Preferably, the screw is located on the stabilizer, while the sports bow has the corresponding nut. The sports bow can have a bow interface at which the stabilizer is attached. Typically, one or more stabilizers are attached to a sports bow. In particular, three stabilizers can be attached to a sports bow, namely a monostabilizer and two side stabilizers. Furthermore, a stabilizer can have several stabilizer sections that can be connected to one another using the at least one quick-release mechanism.

[0021] A tripod according to the invention, particularly for cameras or photographic equipment, has at least one quick-release device. The tripod can have at least one leg, wherein the at least one leg can be attached to the tripod using the at least one quick-release device. The at least one leg can also have several leg sections that can be connected to one another using 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 placed on it, in particular a camera or photographic equipment.

[0022] A billiard cue according to the invention has at least one quick-release clamping device. The billiard cue can have several billiard cue sections that can be connected to one another by means of the at least one quick-release clamping device.

[0023] Exemplary embodiments of the inventions are explained with reference to the following figures: It shows: Fig. 1 a two-dimensional schematic representation of an embodiment of a quick-release clamping device in a disassembled state, Fig. 2 a three-dimensional schematic representation of the in Fig. 1 embodiment shown in the Fig. 1 depicted state, Fig. 3 a two-dimensional schematic representation of the in Fig. 1. Exemplary embodiment shown in an assembled state, Fig. 4 a three-dimensional schematic representation of the in Fig. 1 embodiment shown in the Fig. 3 depicted state, Fig. 5 a schematic representation of a sports bow with stabilizers, Fig. 6 a schematic representation of the side stabilizers of the in Fig. 5 shown embodiment, and Fig. 7 a schematic sectional view of a quick-release clamping device of the in Fig. 6 side stabilizers shown.

[0024] The Fig. Figures 1 to 7 show different views of various embodiments. For clarity, not all reference numerals are used in every figure. The same reference numerals are used for identical and functionally equivalent parts.

[0025] Fig. Figure 1 shows an embodiment of a quick-release clamping device 10 with a nut 20 and a screw 60. Fig. Figure 1 shows the quick-release clamping device 10 in its disassembled state. The nut 20 has a bore 30. The bore 30 has a threaded bore 40, which is arranged along a longitudinal thread axis 46. In addition, the bore 30 has a sliding bore 50 with a sliding bore diameter 52, which is arranged along a sliding axis 54. The longitudinal thread axis 46 and the sliding axis 54 intersect within the volume enclosed by the nut 20 and form an angle of intersection 32. This results in the threaded bore 40 and the sliding bore 50 being superimposed in the bore 30, such that the threaded bore 40 has two partial internal threads, namely a front partial internal thread 42 and a rear partial internal thread 44. As can be seen in particular from Fig. As can be seen from Figure 2, the front partial internal thread 42 and the rear partial internal thread 44 are not contiguous. The bore 30 in the nut 20 is a blind hole, so that the bore 30 has only one bore opening 34. Since the longitudinal axis of the thread 46 and the displacement axis 54 are angularly offset, the bore opening 34 is oval. The partial internal thread 42, which is located closer to the bore opening 34, is referred to as the front partial internal thread 42. Accordingly, the partial internal thread further away from the bore opening 34 is referred to as the rear partial internal thread 44. Following the rear partial internal thread 44, a connecting bore 48 with a connecting bore diameter 49 is arranged along the longitudinal axis of the thread 46. The connecting bore 46 has no internal thread. In particular, from Fig. Figure 3 shows that the connection bore diameter 49 is equal to the external thread diameter 84.

[0026] The screw 60 has a shank 80 arranged along a longitudinal axis 62 and a screw head 70. The shank 80 has an external thread 82 with an external thread diameter 84 that matches the partial internal threads 42, 44. The sliding bore diameter 52 is larger than the external thread diameter 84, so that the shank 80 can be easily inserted into the sliding bore 50 along the sliding axis 54. During the insertion process, the longitudinal axis 62 and the sliding axis 54 typically coincide. Since the thread axis 46 is rotated relative to the sliding axis 54 by an angle of intersection 32, the screw 60 and the nut 20 are tilted relative to each other during the insertion process.

[0027] The nut 20 can be slid onto the shaft 80 along the displacement axis 54, preferably over a large part of the external thread 82. Typically, the nut 20 is slid onto the shaft 80 until a nut-side contact surface 24 and a screw-head-side contact surface 72 at least partially touch. Contact surfaces are defined as those parts of the surface of the screw 60 and the nut 20 that are in direct contact with each other when the quick-release clamping device 10 is fully screwed in, with the exception of the external thread 82, the front partial internal thread 42, and the rear partial internal thread 44.

[0028] The nut-side contact surface 24 has a nut contour 22, and the screw-head-side contact surface 72 has a screw-head contour 74. The screw-head contour 74 and the nut contour 22 are designed to be interlocked and rotatable. In particular, made of Fig. Figure 2 shows 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 complementary to each other. The cylindrical nut contour 22 is rotationally symmetrical about the longitudinal axis of the thread 46, and the recess 76 is rotationally symmetrical about the longitudinal axis of the screw 62. This causes the screw 60 and the nut 20 to tilt relative to each other when the nut contour 22 and the screw head contour 74 are inserted, so that the longitudinal axis of the screw 62 and the longitudinal axis of the thread 46 come into contact. If, during the insertion process, the longitudinal axis of the screw 62 and the displacement axis 54 lie on top of each other, the nut 20 and the screw 60 tilt into the cutting angle 32 when the nut contour 22 and the screw head contour 74 are inserted into each other.This tilting at the end of the insertion process can be supported by a rounding 56 arranged at the end of the sliding bore 50. This is particularly the case when the length of the sliding bore 50 and the length of the shaft 80 are precisely matched.

[0029] By tilting, the external thread 82 of the screw 60 and the front partial internal thread 42 as well as the rear partial internal thread 44 of the nut are aligned within each 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 each other is therefore no longer possible. Due to the rotationally symmetrical and mutually complementary design of the nut contour 22 and the screw head contour 74, the nut 20 and the screw 60 can be screwed into each other, and the quick-release clamping device 10 can thereby be tightened.

[0030] Even before the quick-release clamping device 10 is clamped, but the nut contour 22 and the screw head contour 74 engage, transverse forces acting perpendicular to the thread longitudinal axis 46 or screw longitudinal axis 62 can be transmitted to the quick-release clamping device via the nut contour 22 and the screw head contour 74 without the risk of tilting or shifting of the screw and nut relative to each other.

[0031] In particular, the depth 77 of the recess 76 determines how far the screw 60 and the nut 20 must be screwed together after the insertion process is complete until the nut-side contact surface 24 and the screw-head-side contact surface 72 are fully in contact. This state, in which the screw 60 and the nut 20 are fully screwed together, is described in the Fig. 3 and Fig. Figure 4 shows that, starting from this state, the quick-release clamping device 10 can be tightened by further screwing in.

[0032] From the Fig. 3 and Fig. Figure 4 shows that when the quick-release clamping device 10 is fully screwed in, the screw longitudinal axis 62 and the thread longitudinal axis 46 ideally align. The external thread 82, the front partial internal thread 42, and the rear partial internal thread 44 are aligned within each other. The screw head contour 74 and the nut contour 22 are inserted into each other.

[0033] Due to the cylindrical shape of the recess 76 in the screw head contour 74 and the complementary shape of the nut contour 22, the screw 60 and the nut 20 can be partially unscrewed without any displacement or tilting of the screw 60 and the nut 20 relative to each other. The extent to which the screw 60 and the nut 20 can be unscrewed without displacement or tilting can be determined, in particular, by the depth 77 of the recess 76.

[0034] From the Fig. 3 and Fig. Figure 4 also shows that the threaded bore 40 is longer than the shaft 80. This allows for effective clamping of the quick-release clamping device 10, particularly since a double fit between screw 60 and nut 20 can thus be avoided.

[0035] Fig. Figure 5 shows a sports bow 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 bow 90 via a bow interface 96.

[0036] As in Fig. As shown in Figure 6, the side stabilizers 92 are arranged at the arc interface 96 by means of a quick-release device 10. The side stabilizer 92 has the screw 60 with the shaft 80 (see Figure 6). Fig. 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 a depth 77 and is complementary to the nut contour 22, which has a corresponding projection 78.

[0037] In the Fig.In the illustration shown, the nut-side contact surface 24 and the screw-head-side contact surface 72 are in contact with each other. 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 in a fully screwed-in state. 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 minimally unscrewing the screw 60 and the nut 20. The external thread 82 therefore remains in the front partial internal thread 42 and in the rear partial internal thread 44, thus securing the screw 60 and the side stabilizer 92 against loss.When the screw 60 and the nut 20 are joined, the tilting of the screw 60 and the nut 20 relative to each other and the alignment of the external thread 82 in the front partial internal thread 42 and the rear partial internal thread 44 can be supported by the fact that the projection 78 of the nut contour 22 and the recess 76 of the screw head contour 74 have a chamfer 26. The connecting bore 48 has no thread. Reference symbol list 10 Quick-release clamping device 20 mother 22 Nut contour 24 mother-side mounting surface 26th phase 30 bore 32 cutting angles 34 bore opening 40 threaded holes 42 front partial internal thread 44 rear partial internal thread 46 Thread longitudinal axis 48 connection holes 49 Connection bore diameter 50 Displacement bore 52 Displacement bore diameter 54 Shifting axis 56 rounding 60 screws 62 Screw longitudinal axis 70 screw heads 72 screw head-side contact surface 74 Screw head contour 76 Exclusion 77 Depth 78 lead 80 shaft 82 external threads 84 External thread diameter 90 Sport Bow 92 Side stabilizer 94 Monostabilizer 96 Arc interface

Claims

[1] Quick-release clamping device (10) 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 sliding bore (50) with a sliding bore diameter (52) along a sliding axis (54), - the longitudinal axis of the thread (46) and the displacement axis (54) intersect in such a way that the longitudinal axis of the thread (46) and the displacement axis (54) form an angle of intersection (32), - a screw (60) with a screw head (70) and a shaft (80) arranged along a longitudinal axis (62) of the screw, which has an external thread (82) matching the partial internal threads (42, 44) with an external thread diameter (84), - the displacement bore diameter (52) is larger than the external thread diameter (84), so that the screw (60) can be inserted into the bore (30) along the displacement axis (54) and the external thread (82) can be arranged in the partial internal threads (42, 44) by tilting the screw (60) and / or the nut (20). - the nut (20) and the screw (60) are provided on their mutually directed contact surfaces (24, 72) with interlocking and rotatable contours (22, 74), wherein a screw head contour (74) on a screw head-side contact surface (72) facing the nut (20) and a nut contour (22) on a nut-side contact surface (24) facing the screw head (70) are formed complementarily to each other. [2] Quick-release clamping device (10) according to claim 1, characterized by , 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). [3] Quick-release clamping device (10) according to claim 1 or 2, characterized by 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). [4] Quick-release clamping device (10) according to claim 3, characterized by , that at least one recess (76) and / or at least one projection (78) is cylindrical, annular or conical in shape. [5] Quick-release clamping device (10) according to one of the preceding claims, characterized by , that the bore (30) is designed as a blind hole. [6] Stabilizer for archery with at least one quick-release device (10) according to one of claims 1 to 5. [7] Tripod, in particular for cameras or photographic equipment, with at least one quick-release device (10) according to any one of claims 1 to 5. [8] Billiard cue with at least one quick-release clamping device (10) according to any one of claims 1 to 5.

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