Quick screw connection device

Abstract

To provide a quick screw connection device that can be easily handled.SOLUTION: A quick screw connection device comprises a threaded bolt having an external thread, and a nut part having an internal thread 5. The nut part has a threaded member 6 in which the internal thread 5 is formed. A through-hole is guided through the threaded member 6 rotated by an angle relative to a longitudinal axis of the internal thread 5, where the diameter of the through-hole is larger than the outer diameter of the internal thread 5 and smaller than the outer diameter of the threaded member 6.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The invention relates to a quick screw connection comprising a threaded bolt with an external thread and a nut part with an internal thread, the nut part having a threaded part on which an internal thread is formed and which is rotated by an angle relative to the longitudinal axis of the internal thread, a through-hole being guided through the threaded part, the diameter of the through-hole being greater than the outer diameter of the internal thread and smaller than the outer diameter of the threaded part. [Background technology]

[0002] The thread or screw connection of two components with a screw thread is a well-known solution for adjusting and also fixing two objects relative to each other. The distance S traveled when adjusting the position of the two components is S = P x U, where P is the pitch of the screw thread and U is the number of revolutions.

[0003] A long distance or a small pitch requires many rotations, which increases the time and labor costs, which is disadvantageous in time-critical applications, such as in medicine, and especially in surgery, because the increased time costs are accompanied by increased strain on the patient.

[0004] The prior art discloses solutions that allow for quicker bridging of long distances. German Patent Application Publication No. 19825132 discloses a screw connection comprising a threaded rod with a bolt thread and a nut. The threaded rod is configured as a square threaded rod with flat surfaces, so that the bolt thread is configured only in the threaded segments. The nut has a square opening attached at an acute angle to the nut thread, which interrupts the nut thread in its corner area to allow or prevent movement of the nut relative to the threaded rod depending on the rotational position. German Patent Application Publication No. 102017129644 discloses a quick screw connection comprising a threaded rod with an external thread and a nut. Both the external thread and the nut thread are flattened on at least two opposite longitudinal sides. The nut is further divided into a first nut member and a second nut member, and the first nut member and the second nut member are rotatable and tightenable relative to each other via a pair of male and female screw threads. Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide a quick screw connection device that is easy to handle and allows for rapid translational position adjustment to bridge a desired distance while increasing the reliability of the screw connection device when the threads are engaged. [Means for solving the problem]

[0006] This problem is solved by a quick screw connection having the features of claim 1. Advantageous embodiments with expedient developments of the invention are set out in the dependent claims.

[0007] The quick screw connection device according to the invention provides the function of a threaded connection and also offers the possibility of releasing the threaded connection by tilting the threaded element, quickly moving a long distance by a purely translational movement, and then re-establishing the threaded connection by a new tilt in the opposite direction, thereby confirming the position achieved. In this case, fine adjustment of the axial position of the threaded element on the threaded bolt can again be achieved by rotating the threaded element relative to the threaded bolt. By machining a through hole with a selected orientation determined by an angle and a selected diameter in an intended manner, it is ensured that on one side of the threaded element, i.e. on the side where the through hole is tilted, the thread turns are completely removed, leaving a sufficient material thickness of the threaded element, while on the other side the thread turns remain with a sufficient threading depth.

[0008] In this case, the angle is obtained from the interval of 2° to 45°, preferably from the interval of 5° to 35°, and more preferably from the interval of 10° to 25°.

[0009] It is particularly preferred to have a pressure element that can be adjusted radially relative to the longitudinal axis between an engagement position, in which the nut part is securely engaged with the internal thread, and an adjustment position, in which the internal thread is loosened from the external thread. The provision of a pressure element increases the process reliability and reliability of the quick screw connection, since a force must be applied perpendicular to the adjustment direction to enable quick adjustment.

[0010] In this case, the pressure element can be biased by a return spring that adjusts the pressure element to the engaged position, i.e., the base state is a given screw engagement, and a force must be actively applied to complete the screw connection. If the force is lost, the screw connection is forcibly controlled and re-established. The spring can be formed, in particular, by a leaf spring, but a compression spring, tension spring or coil spring is also basically suitable.

[0011] The pressing member may additionally have a first guide surface which biases the threaded member in the engagement position. The pressing member may also have a second guide surface which biases the threaded member in the adjustment position. This configuration simplifies operation and further increases process reliability, and also provides that the threaded member has, on its side facing the pressing member, a third guide surface which is inclined with respect to the longitudinal axis and extends from outside to inside, and which is determined to abut against the first and second guide surfaces.

[0012] In order to avoid wedging or tilting, the first and second guide surfaces can be configured with rounding on the side facing the longitudinal axis.

[0013] Particularly preferred is the further provision of an annular outer part with two opposite side plates containing the threaded bolt and on which the pressure element is supported, which ensures that the nut element is integral, since the threaded element and the pressure element are permanently held together.

[0014] In addition, a first guide pin may be formed in each of the side plates, in which the pressure element is guided in a respective elongated hole extending tangentially to the longitudinal axis, thereby ensuring axial fixation and at the same time radial guidance.

[0015] Additionally, a transverse hole can extend through the threaded member perpendicular to the longitudinal axis of the female thread, and by this transverse hole the threaded member is supported on a radially inwardly directed second guide pin, thereby improving control of the tilting movement of the threaded member relative to the longitudinal axis and improving integration of the part with the nut portion.

[0016] The features and combinations of features mentioned hereinabove, and those mentioned below in the description of the drawings and / or shown only in the drawings, can be used not only in the respective combinations shown, but also in other combinations or alone, without departing from the scope of the present invention. Accordingly, embodiments that are not explicitly shown or described in the drawings, but which are apparent from and can be formed from the described embodiments by combinations of separate features, should also be considered to be encompassed or disclosed by the present invention.

[0017] Further advantages, features and details of the invention will become apparent from the claims, the following description of preferred embodiments and from the drawings. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a quick screw connection between a threaded bolt and a nut part that can be quickly loosened. FIG. [Figure 2] FIG. 10 is a longitudinal cross-sectional view of the threaded member of the nut portion. [Figure 3] FIG. 1 is a longitudinal cross-sectional view of a threaded bolt and nut portion with the threaded member engaging the threads of the threaded bolt in an engaged position. [Figure 4] 4 is a view corresponding to FIG. 3, in which the threaded member is not engaged with the threads of the threaded bolt in the adjusted position. DETAILED DESCRIPTION OF THE INVENTION

[0019] FIG. 1 shows a quick screw connection 1 formed by a threaded bolt 3 with an external thread 2 and a nut part 4 with an internal thread 5. The nut part 4 has a threaded part 6 on which the internal thread 5 is formed. It can also be seen in FIG. 2 that a through hole 8 is guided through the threaded part 6, rotated by an angle α relative to the longitudinal axis 7 of the internal thread 5. The diameter of the through hole 8 is selected in a deliberate manner, i.e., larger than the outer diameter of the internal thread 5 and smaller than the outer diameter of the threaded part 6, so that on one side of the inclined through hole 8, the internal thread 5 is bored out and on the opposite side, the internal thread 5 remains fully threaded. The angle α is taken from the interval between 2° and 45°, preferably from the interval between 5° and 35°, and even more preferably from the interval between 10° and 25°.

[0020] 1, 3 and 4 show that the nut part 4 further has a pressing member 9, which is radially adjustable with respect to the longitudinal axis 7 between an engagement position in which the internal thread 5 is securely engaged with the external thread 2, and an adjustment position in which the internal thread 5 is loosened from the external thread 2. To this end, the pressing member 9 is biased by a return spring 10, which adjusts the pressing member 9 to the engagement position and thereby ensures the engagement position.

[0021] The pressing member 9 has a first guide surface 11 which biases the threaded member 6 in the engagement position and a second guide surface 12 which biases the threaded member 6 in the adjustment position. The threaded member 6 further has, on its side facing the pressing member 9, a third guide surface 13 which is inclined with respect to the longitudinal axis 7 and extends from outside to inside, and which is defined to abut against the first guide surface 11 and the second guide surface 12.

[0022] It can be particularly seen from FIGS. 3 and 4 that the first guide surface 11 and the second guide surface 12 are configured with rounded edges on the sides facing the longitudinal axis.

[0023] The nut part 4 further has an annular outer part 14 which surrounds the threaded bolt 3 and has two opposite side plates 15 on which the pressure elements 9 are supported. The nut part 4 is thus formed in three parts by the outer part 14, the threaded element 6 and the pressure elements 9. The three parts are united by the fact that the side plates 15 each have a first guide pin, by which the pressure elements 9 are axially fixed and radially guided in a respective elongated hole 17 extending tangentially to the longitudinal axis 7, and a transverse hole 18 which passes through the threaded element 6 perpendicular to the longitudinal axis 7 of the internal thread 5 and by which the threaded element 6 is supported on a second guide pin facing radially inward.

[0024] In the configuration of Figure 3, when the threaded bolt 3 is screwed in downwards, a reaction force is generated that is directed upwards and is transmitted to the outer part 14 via the positive lock. Therefore, when used in this manner, the threaded connection cannot be loosened. However, a downward axial force can also be applied to the threaded bolt 3, which will cause the threaded element 6 to be pulled downwards, thereby achieving the configuration of Figure 4, which allows for quick position adjustment. On the other hand, if an axially upward force is applied to the threaded bolt 3, the position of the threaded element 6 is maintained and fixed via the tooth engagement, and in the configuration shown in Figure 3, ratcheting of the threaded bolt 3 in an upward direction is prevented.

[0025] The configuration of FIG. 4 can also be achieved by radially adjusting the position of the pressure member 9 against the force of the return spring 10, in which case the configuration of FIG. 3 is automatically adjusted again after the return spring 10 is released. [Explanation of symbols]

[0026] 1 Quick screw coupling device 2 external threads 3 threaded bolts 4 Nut part 5 internal threads 6 Threaded members 7 Longitudinal axis 8 through holes 9 Pressing member 10 Return spring 11 First guide surface 12 Second guide surface 13 Third guide surface 14 Outer part 15 Side Plate 16 First guide pin 17 long hole 18 Horizontal hole α angle

Claims

1. 1. A quick screw connection (1) comprising a threaded bolt (3) with an external thread (2) and a nut part (4) with an internal thread (5), characterized in that the nut part has a threaded part (6) on which the internal thread (5) is formed, and a through hole (8) is guided through the threaded part (6) rotated by an angle (α) relative to the longitudinal axis (7) of the internal thread (5), the diameter of the through hole (8) being greater than the outer diameter of the internal thread (5) and smaller than the outer diameter of the threaded part (6).

2. 2. The quick screw connection device (1) according to claim 1, characterized in that the angle (α) is obtained from the interval between 2° and 45°, preferably from the interval between 5° and 35°, and even more preferably from the interval between 10° and 25°.

3. 3. The quick screw connection device according to claim 1, wherein the nut part (4) has a pressing element (9) which is adjustable in position radially relative to the longitudinal axis (7) between an engagement position in which the internal thread (5) is securely engaged with the external thread (2) and an adjustment position in which the internal thread (5) is loosened from the external thread (2).

4. 4. The quick screw coupling device (1) according to claim 3, characterized in that the pressing member (9) is biased by a return spring (10) which adjusts the pressing member (9) to the engagement position.

5. 5. The quick screw connection device (1) according to claim 3 or 4, characterized in that the pressing member (9) has a first guide surface (11) which biases the threaded member (6) in the engaged position.

6. 6. The quick screw connection device (1) according to claim 3, wherein the pressing member (9) has a second guide surface (12) which biases the threaded member (6) in the adjustment position.

7. 7. The quick screw connection device (1) according to claim 6, characterized in that the threaded element (6) has, on its side facing the pressure element (9), a third guide surface (13) extending from the outside to the inside at an angle with respect to the longitudinal axis (7) and determined to abut against the first guide surface (11) and the second guide surface (12).

8. 8. The quick screw connection device (1) according to claim 7, characterized in that the first guide surface (11) and the second guide surface (12) are configured with rounded edges on the sides facing the longitudinal axis (7).

9. 9. A quick screw connection device (1) according to any one of claims 3 to 8, characterized in that the nut part (4) has an annular outer part (14) which surrounds the threaded bolt (3) and has two opposite side plates (15) on which the pressure element (9) is supported.

10. 10. The quick screw connection device (1) according to claim 9, characterized in that a first guide pin (16) is formed in each of the side plates (15), in which the pressure element (9) is axially fixed and radially guided in a respective elongated hole (17) extending tangentially to the longitudinal axis (7).

11. 11. A quick screw connection (1) according to claim 9 or 10, characterized in that a transverse hole (18) passes through the threaded element (6) perpendicular to the longitudinal axis (7) of the internal thread (5), by means of which the threaded element (6) is supported on a second guide pin pointing radially inwards.

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