Mobile antenna shock absorber

Abstract

FIELD: antennas.SUBSTANCE: invention relates to shock-absorbing spring devices and is intended to protect antenna elements mounted on mobile objects from mechanical impacts and vibrations. The shock absorber for a mobile antenna consists of an electrically conductive sleeve (1), in which a coaxial antenna power cable (9) is threaded through an opening to connect the antenna, passing through one of the extension springs (6) to a high-frequency connector (10), and which is fixedly connected by bolts (3) to an electrically conductive support cup (2), which has a rubber ring (4) in the groove and rests against an electrically conductive support-cam sleeve (5), pulled to the electrically conductive sleeve (1) by at least three extension springs (6) and connected by fastening screws (8) to a connecting sleeve (7), which has an internal thread for screwing the shock absorber onto a mobile placement object, wherein the support cup (2) with a rubber ring (4) located in it is configured for swinging relative to the support-cam sleeve (5) left-right-forward-backward, remaining held by said tension springs (6), and the rubber ring (4) is positioned so as to be able to interact with the cam of the support cam sleeve (5), and the high-frequency connector (10) is connected to the plate (12) by screws (11).EFFECT: improving the shock-absorbing properties in terms of the ability to dampen the swings (oscillations) of the antenna from external mechanical influences and maintaining a more stable vertical position during the movement of objects on which the antenna is installed, over uneven surfaces, with acceleration, and upon collision with obstacles.2 cl, 1 dwg

Description

[0001] The invention relates to the field of antenna devices, namely to shock-absorbing spring devices and is intended to protect antenna elements mounted on mobile objects from mechanical impacts and vibrations.

[0002] A prior art shock absorber for a mobile antenna is disclosed in USSR Patent No. 169575, H01Q 1 / 20, published March 17, 1965. It consists of a pin, a tail, and connecting springs. The ends of a coil spring, formed as a wire cylindrical screen enclosing internal metal longitudinal springs, are crimped in grooves in the pin and tail and tightly soldered to them. The rubber with which the shock absorber is pressed has the shape of a truncated cone. Disadvantages of this known shock absorber for a mobile antenna include: low shock-absorbing properties, the inability to lay the coaxial antenna power cable inside the structure to protect it from external influences, and the need to use an underlying surface for antenna operation.

[0003] A shock absorber for a mobile antenna is known, consisting of a sleeve for connection with the antenna, a rod for connection with receiving and transmitting equipment, wire elastic elements for connecting them and rubber, in which the shock absorber is pressed, the elastic elements are made in the form of a bundle made of sections of spring wire of a round cross-section in such a way that the sections of spring wire, forming the core of the bundle, are fixedly connected to the transition bushings and have a greater length than the sections of spring wire located along the perimeter of the bundle and freely placed in the guide holes of the transition bushings, while the rubber is covered with a shell of heat-shrinkable tube (Patent of the Russian Federation No. 2458436, H01Q 1 / 20, published 10.08.2012).

[0004] The disadvantages of the prototype are: low shock-absorbing properties, the inability to lay the coaxial cable for the antenna power supply inside the structure to protect it from external influences, the need to use an underlying surface for the antenna to operate.

[0005] The objective of the claimed invention is to eliminate the shortcomings of known solutions by developing a design for a mobile antenna shock absorber that provides protection for the coaxial cable from external influences, allows for damping mechanical vibrations of the antenna that occur when it bends, and also allows for the use of the antenna without an underlying surface.

[0006] The technical result of the claimed invention consists in improving the shock-absorbing properties in terms of the ability to dampen the swings (oscillations) of the antenna from external mechanical influences and maintaining a more stable vertical position during the movement of objects on which the antenna is installed, over uneven surfaces, with acceleration, and when colliding with obstacles.

[0007] The stated problem is solved, and the specified technical result is achieved due to the fact that the shock absorber for a mobile antenna consists of an electrically conductive sleeve (1), in which a coaxial antenna power cable (9) is threaded through an opening to connect the antenna, passing through one of the extension springs (6) to a high-frequency connector (10) and which is fixedly connected by bolts (3) to an electrically conductive support cup (2) which has a rubber ring (4) in the groove and rests against an electrically conductive support-cam sleeve (5), pulled to the electrically conductive sleeve (1) by at least three extension springs (6) and connected by fastening screws (8) to a connecting sleeve (7), which has an internal thread for screwing the shock absorber onto a mobile placement object, while the support cup (2) with the rubber ring (4) located in it is made with the possibility of swinging relative to support cam sleeve (5) left-right-forward-backward,remaining held by said tension springs (6), and the rubber ring (4) is positioned so as to be able to interact with the cam of the support-cam sleeve (5), and the high-frequency connector (10) is connected to the plate (12) by screws (11).,

[0008] An additional version of the device is possible, in which a ferrite choke is placed in the connecting sleeve (7), consisting of a coaxial antenna power cable (9), threaded through ferrites and twisted into a spiral of two or more turns.

[0009] The claimed invention is explained with reference to Fig. 1, where:

[0010] 1 - conductive bushing;

[0011] 2 - conductive support cup;

[0012] 3 - bolts;

[0013] 4 - rubber ring;

[0014] 5 - conductive cam bushing;

[0015] 6 - extension springs;

[0016] 7 - connecting sleeve;

[0017] 8 - mounting screws;

[0018] 9 - Antenna power coaxial cable;

[0019] 10 - high frequency connector;

[0020] 11 - screws;

[0021] 12 - plate.

[0022] The essence of the technical solution is explained (Fig. 1), which shows the device of the proposed shock absorber, containing an electrically conductive sleeve (1) for connection to an antenna, which is connected with bolts (3) to an electrically conductive support cup (2), which in turn rests against an electrically conductive support-cam sleeve (5), and the latter is screwed to the connecting sleeve (7) with fastening screws (8). Sleeves (1) and (5) are pulled together by three extension springs (6). A rubber ring (4) is inserted into the groove of the electrically conductive support cup (2). A coaxial cable for feeding the antenna (9) is threaded into one of the three extension springs (6), the lower end of which ends with a high-frequency connector (10), which in turn is fixed in the plate (12) with screws (11) on the sleeve (7).

[0023] The proposed device, consisting of an electrically conductive support cup (2) and a support-cam sleeve (5) pulled together by three tension springs (6), between which, in turn, a rubber ring (4) is inserted, similar to a rotary joint mechanism, the purpose of which is to increase the coefficient of friction between the above-mentioned parts during the (oscillation) swinging of the antenna.

[0024] When the antenna swings, the support cam sleeve (5) remains stationary, while the support cup (2), with the rubber ring (4) located in it, swings relative to it left-right-forward-backward, remaining held by three extension springs (6).

[0025] During the rocking movements of the support cup, friction occurs between the rubber ring (4) and the cam of the support sleeve (5), which contributes to the effective damping of oscillations (swings).

[0026] The presence of three springs, in comparison with the closest prototypes, allows maintaining a high level of the tightening force of the support cup and the support-cam sleeve while maintaining the possibility of greater (in comparison with the closest prototypes) elongation without residual deformation of the spring(s).

[0027] This makes the proposed shock absorber more flexible while maintaining its elastic properties. The proposed shock absorber design dampens mechanical vibrations of the antenna that occur when it is bent up to 90 degrees and then immediately released, reducing their number from 5-10 (as in the prototype, depending on the antenna's mass) to 1-2 vibrations (depending on the antenna's mass). This design also allows for the installation of a coaxial cable within the shock absorber, and the external geometry and conductive materials of this invention allow the shock absorber to be used as the antenna's lower radiator—a dipole.

[0028] The claimed invention is most successfully industrially applicable for use in mobile antennas of vertical dipole design.

Claims

1. A shock absorber for a mobile antenna, consisting of an electrically conductive sleeve (1), in which a coaxial antenna power cable (9) is threaded through an opening to connect the antenna, passing through one of the extension springs (6) to a high-frequency connector (10), and which is fixedly connected by bolts (3) to an electrically conductive support cup (2), which has a rubber ring (4) in the groove and rests against an electrically conductive support-cam sleeve (5), pulled to the electrically conductive sleeve (1) by at least three extension springs (6) and connected by fastening screws (8) to a connecting sleeve (7), which has an internal thread for screwing the shock absorber onto a mobile placement object, wherein the support cup (2) with the rubber ring (4) located in it is made with the possibility of swinging relative to the support-cam sleeve (5) left-right-forward-backward, remaining held the specified extension springs (6),and the rubber ring (4) is positioned so as to be able to interact with the cam of the support cam sleeve (5), and the high-frequency connector (10) is connected to the plate (12) by screws (11)., 2. A shock absorber for a mobile antenna according to paragraph 1, characterized in that a ferrite choke is placed in the connecting sleeve (7), consisting of a coaxial antenna power cable (9), threaded through ferrites and twisted into a spiral of two or more turns.

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