CN218177697U

CN218177697U - Anti-vibration fastening bolt for underwater robot

Info

Publication number: CN218177697U
Application number: CN202120352597.1U
Authority: CN
Inventors: 徐东岑
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-12-30
Anticipated expiration: 2031-02-04

Abstract

The utility model discloses a vibration-proof fastening bolt for an underwater robot, which comprises a reducing screw rod, wherein the reducing screw rod comprises a first thread section and a second thread section which are opposite in thread direction, and a reducing transition section is arranged between the first thread section and the second thread section; the first screw thread section is matched with a first nut, the second screw thread section is matched with a second nut, and a double-nut connector is connected between the first nut and the second nut. The utility model provides a bolt for underwater robot receives to produce under the high frequency vibration that has the low frequency vibration that the environment caused and body part to cause for a long time under water and lax, lead to the unstable problem of structure, improves bolt anti vibration ability, reduces the strength loss of screw rod, and reinforcing bolt durability improves the stable in structure of the long-time work of underwater robot, reduces its maintenance cost and accident rate, has extensive application prospect and apparent economy, social.

Description

Vibration-proof fastening bolt for underwater robot

Technical Field

The utility model belongs to component fastening field, concretely relates to antivibration fastening bolt for underwater robot.

Background

The underwater robot is an underwater automatic device which integrates multiple disciplinary advanced technologies such as machinery, electronics, control, sensing, artificial intelligence and the like. The underwater robot has important application in the aspects of marine resource exploration, marine drilling platform maintenance, marine ranch monitoring and underwater operation. The underwater robot shock-proof lock bolt has the advantages that due to the fact that underwater environments are complex, low-frequency vibration of environments such as ocean currents and waves and high-frequency vibration of parts such as a propeller, a hydraulic valve and a motor of a robot body exist, the structure is prone to being unstable after long-term use, and due to the fact that the underwater robot is not prone to being maintained and repaired, high in manufacturing cost and difficult to recover accidents, the operation stability of the underwater robot is improved, and the accident rate of the underwater robot shock-proof lock bolt is reduced.

The utility model people retrieve the following relevant documents: CN 108061091A discloses a bolt anti-loose locking method and a never-loose bolt, and the above technology provides a double-nut back-off locking method, but the stress is concentrated due to the sudden change of the rod diameter during the design of a screw rod, so that the strength of the screw rod is reduced. On the other hand, the designed nut contact surface can rotate relatively, and the double nuts cannot be locked completely, so that the fastening performance of the bolt is reduced.

Disclosure of Invention

To the technical problem mentioned above, the utility model aims at providing a antivibration fastening bolt for underwater robot.

The utility model adopts the technical proposal that:

a vibration-proof fastening bolt for an underwater robot comprises a reducing screw, wherein the reducing screw comprises a first thread section and a second thread section which are opposite in thread direction, and a reducing transition section is arranged between the first thread section and the second thread section; the cooperation of first screw thread section has first nut (first nut is identical with the screw thread of first screw thread section), and the cooperation of second screw thread section has the second nut (the second nut is identical with the screw thread of second screw thread section), is connected with two nut connectors between first nut and the second nut, two nut connector both ends are equipped with cyclic annular wedge respectively, and its both ends cyclic annular wedge meshes with the cyclic annular wedge of first nut rear end and the cyclic annular wedge of second nut front end respectively, connects first nut and second nut as whole.

The diameter of the first thread section is larger than that of the second thread section, and the first nut freely penetrates through the second thread section.

The length of the reducing transition section is 1-3 times of the diameter of the second thread section, stress concentration is easy to occur when the length of the reducing transition section is too short, and material waste is easy to cause when the length of the reducing transition section is too long. Further, the variable diameter transition section has a length 1 times the diameter of the second thread section.

The length of the double-nut connector is greater than or equal to the length of the variable-diameter transition section, and when the length of the double-nut connector is greater than the length of the variable-diameter transition section, the double-nut connector is connected with the first thread section, the second thread section and the screw variable-diameter transition section in a nested mode; when the length of the double-nut connector is equal to that of the reducing transition section, the double-nut connector is connected with the reducing transition section in a nested mode.

The elastic modulus of the double-nut connector is smaller than that of the first nut and the second nut, and furthermore, the double-nut connector is made of mild steel materials.

Preferably, both ends of the reducing screw rod are provided with a first thread section and a second thread section with opposite thread directions.

The utility model has the advantages that:

(1) And the vibration resistance of the bolt is improved. The anti-thread double-buckle locking system can effectively prevent the bolt from loosening and losing efficacy under the action of high-frequency vibration load, greatly improves the anti-vibration performance of the bolt, and realizes that the bolt never loosens under the action of vibration load.

(2) The strength loss of the screw is reduced. Stress transmission law is fully considered in the design of the screw reducing transition section, stress concentration caused by sudden change of the structural shape is avoided, and therefore the strength of the screw is reduced, and the strength of the screw is reduced to the minimum extent in the screw reducing process.

(3) And the durability of the bolt is enhanced. Because the elastic modulus of the double-nut connector is smaller than the first nut and the second nut, the double-nut connector is extruded by the double-nut connector under high-frequency vibration to generate a damping effect, the energy is dissipated by the double-nut connector through deformation, the power damage of the first nut and the second nut is reduced, and the durability of the bolt is enhanced.

(4) The first nut and the second nut are effectively contacted through the arrangement of the annular wedges at the two ends of the double-nut connector, the annular wedge at the rear end of the first nut and the annular wedge at the rear end of the second nut, and the double-nut connector is extruded after the second nut is fastened, so that the first nut is extruded, and the first nut is effectively prevented from loosening; and the first nut and the second nut synchronously rotate under the transmission state of the double-nut connector.

(5) The problem of the underwater robot bolt produce under the influence of the low frequency vibration that exists the environment for a long time under water and the high frequency vibration that the body part caused and loosen, lead to the structure unstable is solved, improve the stable in structure of long-time work of underwater robot, reduce its maintenance cost and accident rate, have extensive application prospect and apparent economy, social.

Drawings

Fig. 1 is a schematic view of embodiment 1 of the present invention;

fig. 2 is an exploded view of embodiment 1 of the present invention;

fig. 3 is a cross-sectional view of embodiment 1 of the present invention;

fig. 4 is a schematic view of embodiment 2 of the present invention;

fig. 5 is an exploded view of embodiment 2 of the present invention;

FIG. 6 is a double nut connector;

FIG. 7 is a left side view of FIG. 6;

fig. 8 is a right side view of fig. 6.

Wherein, 1, an object; 2. a bolt head; 3. a variable diameter screw; 301. a smooth screw section; 302. a first thread segment; 303. a variable diameter transition section; 302. a second thread segment; 4. a first nut; 5. a second nut; 6. a double-nut connector.

Detailed Description

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "longitudinal," "transverse," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Example 1

As shown in fig. 1-3 and 6-8, the anti-vibration fastening bolt for the underwater robot comprises a bolt head 2 and a reducing screw rod 3, wherein the reducing screw rod 3 comprises a first thread section 302 and a second thread section 304 with opposite thread directions, and a reducing transition section 303 is arranged between the first thread section 302 and the second thread section 304; the first thread section 302 is matched with a first nut 4, the second thread section 304 is matched with a second nut 5, a double-nut connector 6 is connected between the first nut 4 and the second nut 5, two ends of the double-nut connector 6 are respectively provided with an annular wedge body, the annular wedge bodies at the two ends are respectively meshed with the annular wedge body at the rear end of the first nut 4 and the annular wedge body at the front end of the second nut 5, and the first nut 4 and the second nut 5 are connected into a whole; the diameter of the first thread section 302 is larger than that of the second thread section 304, the first nut 4 can freely penetrate through the second thread section 304, the length of the reducing transition section 303 is 1 time of that of the second thread section 304, the length of the double-nut connector 6 is larger than that of the screw reducing transition section 303, and the double-nut connector 6 is connected with the first thread section 302, the second thread section 304 and the reducing transition section 303 in a nested mode. The strength of the double-nut connector 6 is equivalent to that of the first nut 4 and the second nut 5, but the double-nut connector 6 is made of mild steel materials;

the method for fastening the anti-vibration fastening bolt comprises the following steps:

the first step is as follows: the reducing screw rod 3 penetrates through the reserved hole of the object 1 and fastens a first nut 4;

the second step is that: installing a double-nut connector 6, wherein an annular wedge body at the front end of the double-nut connector 6 is meshed with an annular wedge body at the rear end of the first nut 4;

the third step: the second nut 5 is fastened to the maximum extent and the annular wedge at the rear end of the double nut connector 6 is engaged with the annular wedge at the front end of the second nut 5.

The principle is that the thread directions of the first thread section 302 and the second thread section 304 are opposite, when the first nut 4 and the second nut 5 rotate in the same direction, the first nut 4 rotates outwards to have a loosening trend, and the second nut 5 rotates outwards to have a fastening trend, so that double-nut reverse buckling locking is realized.

Example 2

Embodiment 2 is the two-way anti-vibration fastening bolt for the underwater robot in embodiment 1, which is converted according to engineering requirements, and as shown in fig. 4 to 8, includes a reducing screw 3, wherein both ends of the reducing screw 3 are provided with a first thread section 302 and a second thread section 304 with opposite thread directions, and a reducing transition section 303 is provided between the first thread section 302 and the second thread section 304; the first thread section 302 is matched with a first nut 4, the second thread section 304 is matched with a second nut 5, a double-nut connector 6 is connected between the first nut 4 and the second nut 5, two ends of the double-nut connector 6 are respectively provided with an annular wedge body, the annular wedge bodies at the two ends are respectively meshed with the annular wedge body at the rear end of the first nut 4 and the annular wedge body at the front end of the second nut 5, and the first nut 4 and the second nut 5 are connected into a whole; the diameter of the first thread section 302 is larger than the diameter of the second thread section 304, and the first nut 4 can freely pass through the second thread section 304. The length of the reducing transition section 303 is 1 time of the diameter of the second thread section 304. The length of the double-nut connector 6 is larger than that of the reducing transition section 303, and the double-nut connector 6 is connected with the first thread section 302, the second thread section 304 and the reducing transition section 303 in a nested mode. The strength of the double-nut connector 6 is equivalent to that of the first nut 4 and the second nut 5, but the double-nut connector 6 is made of mild steel materials;

the fastening method of the bidirectional vibration-proof fastening bolt comprises the following steps:

the first step is as follows: the reducing screw rod 3 penetrates through the reserved hole of the object 1 and is respectively fastened with a first nut 4 from two ends of the reducing screw rod 3;

the second step is that: two ends of the reducing screw rod 3 are respectively provided with a double-nut connector 6 with proper specification, and an annular wedge body at the front end of the double-nut connector 6 is meshed with an annular wedge body at the rear end of the first nut 302;

the third step: the second nut 5 is fastened at the two ends of the reducing screw rod 3 to the maximum extent and the annular wedge body at the rear end of the double-nut connector 6 is meshed with the annular wedge body at the front end of the second nut 304.

The utility model provides a bolt reliable performance under the high-frequency vibration environment and unstable, very easily take place the problem of lax, inefficacy, be applicable to a plurality of fields such as track traffic, civil engineering, machine-building, can effectively improve bolt anti vibration ability, reduce the strength loss of screw rod, reinforcing bolt durability has extensive application prospect and apparent economy, social.

Claims

1. The utility model provides a antivibration fastening bolt for underwater robot which characterized in that: the anti-vibration fastening bolt comprises a variable-diameter screw rod (3), the variable-diameter screw rod (3) comprises a first thread section (302) and a second thread section (304) which are opposite in thread direction, and a variable-diameter transition section (303) is arranged between the first thread section (302) and the second thread section (304); first screw thread section (302) cooperation has first nut (4), and second screw thread section (304) cooperation has second nut (5), is connected with double nut connector (6) between first nut (4) and second nut (5), double nut connector (6) both ends are equipped with cyclic annular wedge respectively, and its both ends cyclic annular wedge meshes with the cyclic annular wedge of first nut (4) rear end and the cyclic annular wedge of second nut (5) front end respectively, connects first nut (4) and second nut (5) as an organic whole.

2. An anti-vibration fastening bolt for an underwater robot as defined in claim 1, characterized in that: the diameter of the first thread section (302) is larger than that of the second thread section (304), and the first nut (4) freely passes through the second thread section (304).

3. An anti-vibration fastening bolt for an underwater robot as defined in claim 1, characterized in that: the length of the reducing transition section (303) is 1-3 times of the diameter of the second thread section (304).

4. A vibration-proof fastening bolt for an underwater robot as defined in claim 3, wherein: the length of the reducing transition section (303) is 1 time of the diameter of the second thread section (304).

5. An anti-vibration fastening bolt for an underwater robot as defined in claim 1, characterized in that: the length of the double-nut connector (6) is greater than or equal to that of the diameter-variable transition section (303), and when the length of the double-nut connector (6) is greater than that of the diameter-variable transition section (303), the double-nut connector (6) is connected with the first thread section (302), the second thread section (304) and the diameter-variable transition section (303) in a nested mode; when the length of the double-nut connector (6) is equal to that of the reducing transition section (303), the double-nut connector (6) is connected with the reducing transition section (303) in a nested mode.

6. An anti-vibration fastening bolt for an underwater robot as claimed in claim 1, wherein: the elasticity modulus of the double-nut connector (6) is smaller than that of the first nut (4) and the second nut (5).

7. An anti-vibration fastening bolt for an underwater robot as defined in claim 1, characterized in that: and a first thread section (302) and a second thread section (304) with opposite thread directions are arranged at two ends of the reducing screw (3).