Shock-resistant sonar buoy and steel wire rope shock absorber thereof

Abstract

The utility model discloses an anti-impact sonar buoy and a steel wire rope shock absorber thereof, the anti-impact sonar buoy comprises a protective cover, a sonar buoy and a buffer device, the protective cover is provided with a groove, one end of the sonar buoy extends to the groove of the protective cover, and the other end of the sonar buoy extends to the steel wire rope shock absorber. Wherein the buffer device comprises a steel wire rope damper and a rubber damping ring, the bottom of the steel wire rope damper is installed on the protective cover, the top of the steel wire rope damper is installed on the end portion, extending to the groove of the protective cover, of the sonar buoy, the rubber damping ring is installed on the sonar buoy in a sleeving mode, and the rubber damping ring is installed on the sonar buoy in a sleeving mode. And the rubber damping ring is clamped between the sonar buoy and the protective cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sonar buoy, especially an anti-impact sonar buoy and a steel wire rope shock absorber thereof. BACKGROUND

[0002] In the Chinese utility model patent with the authorization announcement number CN221294025U, the applicant discloses an anti-impact sonar buoy, which comprises a sonar buoy, a protective cover and a buffer device. The protective cover has a groove, one end of the sonar buoy extends to the groove of the protective cover, the buffer device comprises a side buffer unit and an end buffer unit, the side buffer unit is arranged between the inner circumferential surface of the protective cover and the outer circumferential surface of the sonar buoy to isolate the inner circumferential surface of the protective cover and the outer circumferential surface of the sonar buoy, the end buffer unit is arranged between the inner bottom surface of the protective cover and the outer bottom surface of the sonar buoy to isolate the inner bottom surface of the protective cover and the outer bottom surface of the sonar buoy, the buffer device is made of ACF (Artificial Cartilage Foam) material, and when the anti-impact sonar buoy enters water to cause the protective cover to vibrate, the buffer device absorbs the vibration transmitted from the protective cover to the sonar buoy. In actual application, the technical scheme provided by the patent of the applicant still has defects. Specifically, since the buffer device is made of ACF material, the price is relatively high, and the buffer device must adopt a special structure to provide effective buffering, resulting in high manufacturing difficulty and low manufacturing efficiency. SUMMARY

[0003] One object of the utility model is to provide an anti-impact sonar buoy and a steel wire rope shock absorber thereof, wherein the anti-impact sonar buoy adopts a steel wire rope shock absorber and a rubber shock absorber to replace the existing buffer device made of ACF material and adopting a special structure, so as to reduce the manufacturing difficulty and cost of the anti-impact sonar buoy of the utility model.

[0004] One object of the utility model is to provide an anti-impact sonar buoy and a steel wire rope shock absorber thereof, wherein the three steel wire rope shock absorbers of the anti-impact sonar buoy are arranged in an equilateral triangle, so that when the anti-impact sonar buoy is launched into water, the three steel wire rope shock absorbers can effectively absorb vibration and reduce the impact on the sonar buoy.

[0005] One object of the utility model is to provide an anti-impact sonar buoy and a steel wire rope shock absorber thereof, wherein the rubber shock absorber is sleeved on the sonar buoy and clamped between the sonar buoy and the protective cover, so that the rubber shock absorber can absorb circumferential vibration without affecting the shock absorption effect of the steel wire rope shock absorber.

[0006] One purpose of the present application is to provide an impact-resistant sonar buoy and a steel wire rope shock absorber thereof, wherein the steel wire rope shock absorber and the rubber shock absorber cooperate to isolate the protective cover and the sonar buoy, thereby improving the shock absorption effect of the buffer device.

[0007] According to one aspect of the present application, the present application provides an impact-resistant sonar buoy, which comprises:

[0008] a protective cover, wherein the protective cover has a groove;

[0009] a sonar buoy, wherein one end of the sonar buoy extends into the groove of the protective cover; and

[0010] a buffer device, wherein the buffer device comprises a steel wire rope shock absorber and a rubber shock absorbing ring, the bottom of the steel wire rope shock absorber is mounted on the protective cover, the top of the steel wire rope shock absorber is mounted on the end of the sonar buoy extending into the groove of the protective cover, wherein the rubber shock absorbing ring is sleeved on the sonar buoy, and the rubber shock absorbing ring is clamped between the sonar buoy and the protective cover.

[0011] According to one embodiment of the present application, the number of steel wire rope shock absorbers is three, and the three steel wire rope shock absorbers are arranged in an equilateral triangle.

[0012] According to one embodiment of the present application, the steel wire rope shock absorber comprises a top extension body, a middle extension body, a bottom extension body, a top steel wire rope, and a bottom steel wire rope, the top extension body, the middle extension body, and the bottom extension body are arranged at intervals, the top steel wire rope extends in a spiral shape, and the top steel wire rope connects the top extension body and the middle extension body, the bottom steel wire rope extends in a spiral shape, and the bottom steel wire rope connects the middle extension body and the bottom extension body, wherein the top extension body of the steel wire rope shock absorber is mounted on the end of the sonar buoy, and the bottom extension body is mounted on the protective cover.

[0013] According to one embodiment of the present application, the top extension body and the bottom extension body are symmetrical with respect to the middle extension body, and the top steel wire rope and the bottom steel wire rope are symmetrical with respect to the middle extension body.

[0014] According to one embodiment of the present invention, the wire rope shock absorber includes a top extension, a bottom extension, and a wire rope, the top extension and the bottom extension are spaced apart from each other, the wire rope extends in a spiral shape, and the wire rope shock absorber connects the top extension and the bottom extension, wherein the top extension of the wire rope shock absorber is installed at the end of the sonar buoy, and the bottom extension is installed on the protective cover.

[0015] According to one embodiment of the present invention, the top extension, the middle extension, the bottom extension, the top wire rope, and the bottom wire rope extend in the same direction.

[0016] According to one embodiment of the present invention, the top extension, the bottom extension, and the wire rope extend in the same direction.

[0017] According to one embodiment of the present invention, screws are used to mount the top extension to the end of the sonar buoy and to mount the bottom extension to the protective cover.

[0018] According to one embodiment of the present invention, the rubber shock absorber rests against the edge of the opening of the protective cover.

[0019] According to one embodiment of the present invention, the rubber shock absorber includes a lap ring and an insertion ring extending downward from the lap ring. The outer diameter of the lap ring is larger than the inner diameter of the groove of the protective cover, and the outer diameter of the insertion ring is equal to the inner diameter of the groove of the protective cover. The insertion ring is inserted into the groove of the protective cover, and the outer wall of the insertion ring is fitted against the inner wall of the protective cover for forming the groove. The lap ring rests against the opening edge of the protective cover.

[0020] According to another aspect of the present invention, the present invention further provides a wire rope shock absorber, which includes a top extension body, a middle extension body, a bottom extension body, a top wire rope, and a bottom wire rope. The top extension body, the middle extension body, and the bottom extension body are arranged at intervals from each other. The top wire rope extends in a spiral shape and connects the top extension body and the middle extension body. The bottom wire rope extends in a spiral shape and connects the middle extension body and the bottom extension body. The extension directions of the top extension body, the middle extension body, the bottom extension body, the top wire rope, and the bottom wire rope are consistent. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of an impact-resistant sonar buoy according to a preferred embodiment of the present invention.

[0022] Figure 2 is an exploded view of the anti-impact sonar buoy according to the above preferred embodiment of the present utility model from another perspective.

[0023] Figure 3 is a partial enlarged view of Figure 2

[0024] Figure 4 is an exploded view of the anti-impact sonar buoy according to the above preferred embodiment of the present utility model from another perspective.

[0025] Figure 5 is a partial enlarged view of Figure 4

[0026] Figure 6 is a sectional view of the anti-impact sonar buoy according to the above preferred embodiment of the present utility model.

[0027] Figure 7 is a partial enlarged view of Figure 6

[0028] Figure 8 is a partial enlarged view of Figure 6

[0029] Figure 9 is a perspective view of a steel cable shock absorber of a buffer device of the anti-impact sonar buoy according to the above preferred embodiment of the present utility model from a perspective.

[0030] Figure 10 is a perspective view of the steel cable shock absorber of the buffer device of the anti-impact sonar buoy according to the above preferred embodiment of the present utility model from another perspective.

[0031] Figure 11 is a sectional view of the steel cable shock absorber of the buffer device of the anti-impact sonar buoy according to the above preferred embodiment of the present utility model.

[0032] Figure 12 is a partial enlarged view of Figure 11

[0033] in the figure:

[0034] 10, sonar buoy; 11, buoy screw hole;

[0035] 20, protective cover; 21, groove; 22, cover body screw hole;

[0036] ​​​​​30, buffer device; 31, steel cable shock absorber; 311, top extension; 3111, first through hole; 3112, first extension screw hole; 312, middle extension; 3121, second through hole; 3122, third through hole; 313, bottom extension; 3131, fourth through hole; 3132, second extension screw hole; 314, top steel cable; 315, bottom steel cable; 32, rubber shock absorber; 321, abutting ring; 322, insertion ring;

[0037] 100, screw. DETAILED DESCRIPTION

[0038] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The application is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

[0039] Also, in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms cannot be understood as limiting the present application. In the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as limiting the number.

[0040] Reference is made to the accompanying drawings that form a part of this Figures 1 to 12 A shock-resistant sonobuoy according to a preferred embodiment of the present application will be disclosed and described in the following description, wherein the shock-resistant sonobuoy includes a sonobuoy 10, a protective cover 20, and a buffer device 30.

[0041] Specifically, the protective cover 20 has a groove 21. One end of the sonar buoy 10 extends to the groove 21 of the protective cover 20. The buffer device 30 includes at least one steel wire rope shock absorber 31 and at least one rubber shock absorber 32. The steel wire rope shock absorber 31 is located in the groove 21 of the protective cover 20 as a whole, and the steel wire rope shock absorber 31 is arranged between the protective cover 20 and the end of the sonar buoy 10 extending to the groove 21 of the protective cover 20. At least a part of the rubber shock absorber 32 is located in the groove 21 of the protective cover 20, and the rubber shock absorber 32 is arranged between the protective cover 20 and the end of the sonar buoy 10 extending to the groove 21 of the protective cover 20. Preferably, the rubber shock absorber 32 is annular and is sleeved on the end of the sonar buoy 10. When the anti-impact sonar buoy is thrown into water to cause the protective cover 20 to vibrate, the buffer device 30 can absorb the vibration transmitted by the protective cover 20 to the sonar buoy 10, so as to protect the sonar buoy 10 from being damaged due to excessive vibration.

[0042] It is worth mentioning that the specific types of the sonar buoy 10 and the protective cover 20 are consistent with the prior art cited by the applicant in the background art, and the present application will not be described here. The anti-impact sonar buoy of the present application is different from the prior art cited by the applicant in the background art in the specific structure of the buffer device 30 and the connection relationship between the buffer device 30 and the sonar buoy 10 and the protective cover 20.

[0043] Reference is made to the accompanying drawings Figures 2 to 5 The buffer device 30 includes three steel wire rope shock absorbers 31, which are arranged between the end of the sonar buoy 10 and the protective cover 20 at three different positions respectively. In this way, the three steel wire rope shock absorbers 31 can ensure the coaxiality of the sonar buoy 10 and the protective cover 20, avoid the inclination of the protective cover 20 relative to the sonar buoy 10, so that the protective cover 20 can always cover the end of the sonar buoy 10, and the sonar buoy 10 can be effectively protected when the anti-impact sonar buoy is thrown. Preferably, in one specific example of the anti-impact sonar buoy of the present application, the three steel wire rope shock absorbers 31 are arranged in an equilateral triangle. It can be understood that the three steel wire rope shock absorbers 31 are of the same specification.

[0044] Reference is made to the accompanying drawings Figures 9 to 12 Reference is made to the accompanying drawings Figures 2 to 5In this specific example of the anti-impact sonar buoy, the steel wire rope shock absorber 31 comprises a top extension body 311, a middle extension body 312, a bottom extension body 313, a top steel wire rope 314 extending in a spiral shape, and a bottom steel wire rope 315 extending in a spiral shape.

[0045] The top extension body 311, the middle extension body 312, and the bottom extension body 313 are arranged at intervals from each other, the top steel wire rope 314 is arranged to connect the top extension body 311 and the middle extension body 312, so that the top steel wire rope 314 is used to suspend the top extension body 311 above the middle extension body 312, and the bottom steel wire rope 315 is arranged to connect the middle extension body 312 and the bottom extension body 313, so that the bottom steel wire rope 315 is used to suspend the bottom extension body 313 below the middle extension body 312. The top extension body 311 is mounted to the end of the groove 21 of the sonar buoy 10 extending to the protective cover 20, and the bottom extension body 313 is mounted to the protective cover 20, so that the steel wire rope shock absorber 31 is entirely accommodated in the groove 21 of the protective cover 20, and the steel wire rope shock absorber 31 is reliably arranged between the bottom of the sonar buoy 10 and the protective cover 20 to absorb the vibration conducted from the protective cover 20 towards the sonar buoy 10. Optionally, in other examples of the anti-impact sonar buoy, the steel wire rope shock absorber 31 can be without the middle extension body 312, and correspondingly, the number of steel wire ropes is one, which is arranged to connect the top extension body 311 and the bottom extension body 313 of the steel wire rope shock absorber 31.

[0046] Preferably, the top extension body 311 and the bottom extension body 313 of the steel wire rope shock absorber 31 are symmetrical relative to the middle extension body 312, and the top steel wire rope 314 and the bottom steel wire rope 315 are symmetrical relative to the middle extension body 312, so that when the steel wire rope shock absorber 31 is installed, the direction of the steel wire rope shock absorber 31 does not need to be confirmed, which is conducive to improving the assembly efficiency of the anti-impact sonar buoy.

[0047] Preferably, the top extension body 311, the middle extension body 312, the bottom extension body 313, the top steel wire rope 314, and the bottom steel wire rope 315 of the steel wire rope shock absorber 31 are consistent in the extension direction, so as to ensure the effect of absorbing vibration of the steel wire rope shock absorber 31. In other words, the top steel wire rope 314 extends along the extension direction of the top extension body 311 and the middle extension body 312, and the bottom steel wire rope 315 extends along the extension direction of the middle extension body 312 and the bottom extension body 313.

[0048] Reference is made to the accompanying drawings Figure 11 and Figure 12 , the top extension body 311 of the steel wire shock absorber 31 has a row of first perforations 3111, the middle extension body 312 has a row of second perforations 3121 and a row of third perforations 3122, the bottom extension body 313 has a row of fourth perforations 3131, wherein the top steel wire 314 is crossed through each of the first perforations 3111 of the top extension body 311 and each of the second perforations 3121 of the middle extension body 312 in sequence to set the top steel wire 314 on the top extension body 311 and the middle extension body 312 and suspend the top extension body 311 above the middle extension body 312, wherein the bottom steel wire 315 is crossed through each of the third perforations 3122 of the middle extension body 312 and each of the fourth perforations 3131 of the bottom extension body 313 in sequence and suspend the bottom extension body 313 below the middle extension body 312.

[0049] Preferably, the inner diameter size of the first perforations 3111 of the top extension body 311, the inner diameter size of the second perforations 3121 and the third perforations 3122 of the middle extension body 312, the inner diameter size of the fourth perforations 3131 of the bottom extension body 313, the outer diameter size of the top steel wire 314 and the outer diameter size of the bottom steel wire 315 are consistent, so that the steel wire shock absorber 31 can prevent the top steel wire 314 and the bottom steel wire 315 from moving along the length direction of the steel wire shock absorber 31, thereby ensuring the shock absorbing effect of the steel wire shock absorber 31.

[0050] Reference is made to the accompanying drawings Figures 2 to 5 In this specific example of the anti-impact sonar buoy of the utility model, the screws 100 are used to install the top extension body 311 of the steel wire shock absorber 31 on the end of the groove 21 of the sonar buoy 10 extending to the protective cover 20 and to install the bottom extension body 313 on the protective cover 20, so that the steel wire shock absorber 31 can be reliably arranged between the sonar buoy 10 and the protective cover 20, and the steel wire shock absorber 31 is hidden to avoid the steel wire shock absorber 31 being interfered by sundries.

[0051] Specifically, the top extension body 311 has at least one first extension body screw hole 3112, the end of the sonar buoy 10 has at least one buoy screw hole 11, the position of the first extension body screw hole 3112 of the top extension body 311 corresponds to the position of the buoy screw hole 11 of the sonar buoy 10, one end of the screw 100 extends to the buoy screw hole 11 of the sonar buoy 10 after passing through the first extension body screw hole 3112 of the top extension body 311, and this end of the screw 100 is screwed to the sonar buoy, so that the top extension body 311 is mounted on the sonar buoy 10. Correspondingly, the bottom extension body 313 has at least one second extension body screw hole 3132, the protective cover 20 has at least one cover body screw hole 22, the position of the second extension body screw hole 3132 of the bottom extension body 313 corresponds to the position of the cover body screw hole 22 of the protective cover 20, one end of the screw 100 extends to the second extension body screw hole 3132 of the bottom extension body 313 after passing through the cover body screw hole 22 of the protective cover 20, and this end of the screw 100 is screwed to the bottom extension body 313, so that the bottom extension body 313 is mounted on the protective cover 20.

[0052] Reference is made to the accompanying drawings Figures 2 to 8 In this specific example of the anti-impact sonar buoy, the rubber shock absorber 32 is abutted against the opening edge of the protective cover 20, so that the rubber shock absorber 32 can prevent sundries from entering the groove 21 of the protective cover 20 when the anti-impact sonar buoy is not launched, to avoid the situation that the steel wire shock absorber 31 is disabled due to interference of sundries. During launching of the anti-impact sonar buoy, the rubber shock absorber 32 can not only deform in the circumferential direction to absorb shock, but also deform in the axial direction to make the steel wire shock absorber 31 absorb shock, thereby ensuring the effect of the buffer device 30 in absorbing shock.

[0053] Specifically, the rubber shock absorber 32 includes an abutment ring 321 and an insertion ring 322 extending downward from the abutment ring 321, the outer diameter of the abutment ring 321 is larger than the inner diameter of the groove 21 of the protective cover 20, and the outer diameter of the insertion ring 322 is equal to the inner diameter of the groove 21 of the protective cover 20, wherein the insertion ring 322 is inserted into the groove 21 of the protective cover 20, the outer wall of the insertion ring 322 is fitted to the inner wall of the protective cover 20 for forming the groove 21, and the abutment ring 321 is abutted against the opening edge of the protective cover 20, as shown in Figures 6 to 8The rubber shock absorber 32 can be reliably clamped between the protective cover 20 and the sonar buoy 10, and the rubber shock absorber 32 can prevent a gap between the protective cover 20 and the sonar buoy 10, so as to avoid sundries from entering the protective cover 20 and interfering with the steel wire rope shock absorber 31 on the basis of providing a good shock absorption effect. Preferably, the outer diameter of the abutting ring 321 is consistent with the outer diameter of the protective cover 20, or the outer diameter of the abutting ring 321 is slightly smaller than the outer diameter of the protective cover 20, so that the impact-resistant sonar buoy can avoid the abutting ring 321 protruding from the protective cover 20.

[0054] With reference to the accompanying drawings, the impact-resistant sonar buoy of the present application will be described in detail. Figures 1 to 12 The assembly process of the impact-resistant sonar buoy can be as follows: first, the rubber shock absorber 32 is sleeved on the sonar buoy 10; second, after the first extension body screw hole 3112 of the top extension body 311 of the steel wire rope shock absorber 31 is aligned with the buoy screw hole 11 at the bottom of the sonar buoy 10, one end of the screw 100 is allowed to pass through the first extension body screw hole 3112 of the top extension body 311 and is screwed to the sonar buoy 10 in a manner extending to the buoy screw hole 11, so that the steel wire rope shock absorber 31 is installed at the bottom of the sonar buoy 10; third, after the steel wire rope shock absorber 31 and the bottom of the sonar buoy 10 sink into the groove 21 of the protective cover 20, the second extension body screw hole 3132 of the bottom extension body 313 of the steel wire rope shock absorber 31 can be aligned with the cover body screw hole 22 of the protective cover 20, and then one end of the screw 100 is allowed to pass through the cover body screw hole 22 of the protective cover 20 and is screwed to the bottom extension body 313 in a manner extending to the second extension body screw hole 3132, so that the steel wire rope shock absorber 31 is installed on the protective cover 20, and the steel wire rope shock absorber 31 is installed between the bottom of the sonar buoy 10 and the protective cover 20; fourth, the rubber shock absorber 32 is allowed to slide along the height direction (i.e., the axial direction) of the sonar buoy 10, and after the insertion ring 322 of the rubber shock absorber 32 is inserted into the groove 21 of the protective cover 20, the abutting ring 321 abuts on the opening edge of the protective cover 20, so that the assembly of the impact-resistant sonar buoy is completed. It can be understood that in other examples of the impact-resistant sonar buoy, the steel wire rope shock absorber 31 can be installed on the bottom of the sonar buoy 10 and the protective cover 20 respectively, and then the rubber shock absorber 32 is sleeved on the sonar buoy 10.

[0055] With reference to the accompanying drawings, the impact-resistant sonar buoy of the present application will be described in detail. Figure 6After the shockproof sonar buoy is assembled, the steel wire shock absorber 31 separates the bottom of the sonar buoy 10 and the bottom wall of the protective cover 20, the rubber shock absorber 32 separates the side of the sonar buoy 10 and the peripheral wall of the protective cover 20, so the steel wire shock absorber 31 and the rubber shock absorber 32 cooperate to effectively absorb the shock, when the shockproof sonar buoy is launched, the buffer device 30 can absorb the shock transmitted from the protective cover 20 to the sonar buoy 10, so as to achieve the purpose of protecting the sonar buoy 10 and avoid the sonar buoy 10 being damaged due to excessive shock.

[0056] Those skilled in the art will understand that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A shock resistant sonobuoy characterized by, Comprising: a protective cover, wherein the protective cover has a recess; a sonar buoy, wherein one end of the sonar buoy extends into the recess of the protective cover; and a buffer device, wherein the buffer device comprises a wire rope shock absorber and a rubber shock absorbing ring, the bottom of the wire rope shock absorber is mounted to the protective cover, the top of the wire rope shock absorber is mounted to the end of the sonar buoy that extends into the recess of the protective cover, wherein the rubber shock absorbing ring is sleeved on the sonar buoy and clamped between the sonar buoy and the protective cover.

2. The shock-resistant sonar buoy according to claim 1, wherein the number of the wire rope shock absorbers is three, and the three wire rope shock absorbers are arranged in an equilateral triangle.

3. The shock-resistant sonar buoy according to claim 2, wherein the wire rope shock absorber comprises a top extension, a middle extension, a bottom extension, a top wire rope and a bottom wire rope, the top extension, the middle extension and the bottom extension are arranged at intervals, the top wire rope extends spirally and connects the top extension and the middle extension, the bottom wire rope extends spirally and connects the middle extension and the bottom extension, wherein the top extension of the wire rope shock absorber is mounted to the end of the sonar buoy, and the bottom extension is mounted to the protective cover.

4. The shock-resistant sonar buoy according to claim 3, wherein the top extension and the bottom extension are symmetrical relative to the middle extension, and the top wire rope and the bottom wire rope are symmetrical relative to the middle extension.

5. The shock-resistant sonar buoy according to claim 3, wherein the wire rope shock absorber comprises a top extension, a bottom extension and a wire rope, the top extension and the bottom extension are arranged at intervals, the wire rope extends spirally and connects the top extension and the bottom extension, wherein the top extension of the wire rope shock absorber is mounted to the end of the sonar buoy, and the bottom extension is mounted to the protective cover.

6. The shock-resistant sonar buoy according to claim 3, wherein the top extension, the middle extension, the bottom extension, the top wire rope and the bottom wire rope extend in the same direction.

7. The shock-resistant sonar buoy according to any one of claims 3 to 6, wherein screws are used to mount the top extension to the end of the sonar buoy and to mount the bottom extension to the protective cover.

8. The shock-resistant sonar buoy according to any one of claims 1 to 6, wherein the rubber shock absorber abuts against the opening edge of the protective cover. ​ 9. The shock-resistant sonobuoy of claim 8, wherein the rubber shock absorber includes an abutment ring and an insert ring extending downwardly from the abutment ring, an outer diameter of the abutment ring being larger than an inner diameter of the groove of the protective cover, an outer diameter of the insert ring being equal to the inner diameter of the groove of the protective cover, wherein the insert ring is inserted into the groove of the protective cover, an outer wall of the insert ring fitting against an inner wall of the protective cover for forming the groove, and the abutment ring abutting against an opening edge of the protective cover.

10. Steel cable shock absorber, characterized in that The extension body includes a top extension body, a middle extension body, a bottom extension body, a top steel wire, and a bottom steel wire, the top extension body, the middle extension body, and the bottom extension body being disposed at intervals from each other, the top steel wire extending in a spiral shape and connecting the top extension body and the middle extension body, and the bottom steel wire extending in a spiral shape and connecting the middle extension body and the bottom extension body, wherein the top extension body, the middle extension body, the bottom extension body, the top steel wire, and the bottom steel wire are in the same direction of extension.

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