Recoil dampening mechanism |
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申请号 | EP08445021.2 | 申请日 | 2008-05-27 | 公开(公告)号 | EP2128552B1 | 公开(公告)日 | 2011-09-07 |
申请人 | Saab AB; | 发明人 | Strömberg, Håkan; | ||||
摘要 | |||||||
权利要求 | |||||||
说明书全文 | The invention concerns a recoilless weapon comprising a launch tube, a loading mechanism and a recoil dampener. A projectile launched from a handhold rocket weapon generates recoil forces, which recoil forces may be deleterious for a gunner that are handling the weapon, as well as for equipment attached to the weapon such as a sight and/or a firing mechanism. In order to decrease the recoil forces, it is known to have recoil dampening mechanisms arranged on the launch tube. Such recoil dampening mechanisms is described in The dampening mechanism of the recoil dampener in The recoil dampener of The recoil dampeners of The main problem is that the dampening of the recoil mechanism in Further problem are: when the support tube of The main object of the invention is to provide an improved dampening mechanism, particularly for hand hold recoilless weapons, which provides a gunner easy adjustment of the recoil mechanism during the weapon use, Further objects of the invention is to provide a dampening mechanism, which is easy shiftable from one launch tube to another launch tube and where said dampening mechanism is arranged such that twisting or tilting of the launch tube when launching a projectile is eliminated or decreased to a minimum, making the dampening mechanism reusable in an economical and environmental respect. The above and other objects are achieved by a recoil dampener which comprises at least two recoil dampening mechanisms comprising dampening means, where the recoil dampener is covered by a support cover comprising a shoulder rest, a sight and a firing mechanism. Characteristic for the recoil dampener is that the dampening is adjustable by adjusting the support cover axially along the launch tube. Further aspects of the recoil dampener according to the invention are:
Main advantages of the dampening mechanism according to the invention are;
The description of the invention is supported by the following figures where;
The recoil dampener 2 in The support cover 4 is, preferably, formed in order to protect the recoil dampening mechanisms 8 from impacts and environmental influences such as snow, ice, dust and corrosive gases. The shoulder support 5 should be easy and reliable replaceable, preferably, foldable mounted on the support cover 4, e.g. in a recess where it can be locked in place by a locking mechanism, such as a snap mechanism. Each recoil dampening mechanism 8, The recoil dampening mechanism housing 10 is mounted to the launch tube 3 by sliding the recoil dampening mechanism housing 10 along the launch tube 3 such that the extending flanges matches into corresponding splines or grooves arranged on the launch tube 3. The recoil dampening mechanism housing 10 is finally locked in place, preferably, by screws or bolts. Alternatively, the recoil dampening mechanism housings 10 may be locked by a snap mechanism. The recoil dampening mechanism 8, In one embodiment, two coil springs 14 are arranged coaxially on the piston 13, one coil spring at each side of the piston cylinder 15. In response to recoil forces from a launched projectile, the launch tube 3 will move backwardly, relative to the support cover 4. As the launch tube 3 moves backwardly, the pistons 13, to which the recoil dampener 2 is attached, slides axially in the piston cylinder 15, inside the recoil dampening mechanism housing 10. The distance (piston stroke) of which the pistons 13 moves in the recoil dampening mechanism housing 10 for a defined recoil force, corresponds to the dampening effect of the dampening mechanism 8. A short piston stroke corresponds to a low dampening effect while a long piston stroke corresponds to a high dampening effect. The piston stroke is determined by the resistance or the force of the coil spring 14, high resistance means a short piston stroke and a low resistance means a long piston stroke. To adjust the dampening effect, different coil springs with different resistance, may be used. For further adjustment of the dampening effect, assuming that one coil spring 14 is used and that the piston cylinder 15 is closed at one end, the piston cylinder 15 may be arranged such that it can be filled with a compressed fluid of different pressure to obtain correct dampening characteristics. The fluid may contain magneto resistive particles in order to make the system magneto resistive adjustable. The dampener may also be arranged such that it takes into account the temperature of the weapon, the acceleration and the position of the launch tube relative to the cover 4. Furthermore, the spring may be of different kinds such as, a coil spring a gas spring or an electromagnetic spring or solenoid. The spring may also be replaced by an elongated rubber element. In a further special version the spring may be replaced by electromagnetic elements. When using electromagnetic springs or solenoids, the dampening effect may be adjusted by varying the applied voltage to the electromagnetic springs. According to the present invention the dampening effect is adjusted manually, by sliding the support cover 4 to different positions along the pistons 13, which positions corresponds to different piston strokes. The different positions are marked by scores on the sides of the launch tube 3. After positioning of the support cover 4 to a specific position (score), the support cover 4 is fixed, preferably by using a clamping device, which clamping device, is arranged on the support cover 4. The clamping device provides a rear stop for the support cover 4 such that the cover 4 is prevented from moving rearward relative to the launch tube. The support cover 4 comprises mounting and locking means, arranged on the inside part of the support cover 4, for mounting and locking the support cover 4 to the pistons 13. The mounting and locking means, preferably, consist of clamping elements, which clamping elements are provided with locking elements. The locking elements, preferably, consist of screws or bolts or may consist of snap locking mechanisms. To further restrict the movement of the support cover 4 and prevent twisting or tilting of the cover 4 relative to the longitudinal axis of the launch tube 3, and to restrict the movement of the support cover 4 between two end positions, the recoil dampening mechanism housing 10 is provided with bearing pads 11. The bearing pads 11 are mounted on the recoil dampening mechanism housings 8, one bearing pad 11 at each end of the recoil dampening mechanism housings 8. The bearing pads 11 are steadily fixed on the recoil dampening mechanism housings 10 such that the recoil dampening mechanism housings 10 slides in splines or grooves on the inner sides of the support cover 4. The bearing pads 11 may be pretensioned such that the dampening effect of the recoil mechanism is adjustable. The sliding/guiding/bearing surfaces may also be plated with hard- and wear resistant surface coating to obtain defined dampening effects. Each splines or groove may have a length which corresponds to a maximum length of which the launch tube 3 are allowed to move relative to the support cover 4. |