Wind power low-temperature anti-seismic anti-loosening fastener

Abstract

The utility model discloses a wind power low-temperature anti-seismic anti-loosening fastener, and belongs to the technical field of wind driven generators, the wind power low-temperature anti-seismic anti-loosening fastener comprises a bolt, a threaded hole is formed in the top of the bolt, a fixing screw is arranged in the threaded hole in a threaded mode, a cylindrical cavity is formed in the lower end of the threaded hole, and a sliding block is arranged at the upper end of the cavity in a sliding mode; the side face of the sliding block is attached to the side face of the cavity, and a spring in a compressed state is arranged between the bottom face of the sliding block and the bottom face of the cavity. According to the wind power low-temperature anti-seismic anti-loosening fastener, by rotating the screw, the screw moves downwards, so that the sliding block is driven to move downwards, the top bead moves outwards, the top bead abuts against the mounting hole, then the stability of the bolt is improved, and compared with an existing device, the situation that the bolt may shake in the mounting hole is avoided; and therefore, the stability of the fastener is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of wind turbines, and in particular relates to a low-temperature, earthquake-resistant and anti-loosening fastener for wind turbines. Background Art

[0002] A wind turbine is a new energy generator that uses natural wind energy to drive the engine blades to rotate and converts wind energy into electrical energy. In order to increase the contact area between wind and blades, the blades are designed to be very large, which causes the base of the wind turbine to be higher. Bolts are needed to fix the bottom of the base to avoid unstable center of gravity.

[0003] The existing anti-loosening fasteners have a relatively simple structure, and are usually fixed in a single bolt and nut manner. When subjected to force, the bolt may shake in the mounting hole, damaging the thread and causing unstable fastening.

[0004] To this end, we proposed a wind power low-temperature earthquake-resistant and anti-loosening fastener to solve the above problems. Utility Model Content

[0005] The purpose of the present application is to solve the problem in the prior art that bolts may vibrate in the mounting hole and damage the thread, and to propose a wind power low-temperature, earthquake-resistant and anti-loosening fastener.

[0006] In order to achieve the above purpose, this application adopts the following technical solutions:

[0007] A wind power low-temperature, earthquake-resistant and anti-loosening fastener comprises a bolt, a threaded hole is formed on the top of the bolt, and a fixing screw is threadedly provided in the threaded hole, a cylindrical cavity is formed on the lower end of the threaded hole, a slider is slidably provided on the upper end of the cavity, and the side surface of the slider is in contact with the side surface of the cavity, a spring in a compressed state is provided between the bottom surface of the slider and the bottom surface of the cavity, a plurality of through holes are formed in a circular array on the side surface of the cavity, and a top ball is slidably provided in the through hole, and the diameter of the top ball is greater than the depth of the through hole, a thick nut is threadedly sleeved on the lower end of the bolt, and a limiting component for limiting the thick nut is provided on the side of the thick nut facing away from the bolt.

[0008] Preferably, a limiting ring for limiting the position of the top ball is fixedly connected to one end of the through hole facing away from the cavity, and the inner ring diameter of the limiting ring is smaller than the diameter of the top ball.

[0009] Preferably, the upper end of the slider is cylindrical and the lower end is truncated cone-shaped, and when the slider is located at the top of the cavity, one side of the top bead fits with the side surface of the slider and the other side is flush with the outer side of the limit ring.

[0010] Preferably, a plurality of slots are formed in a circular array on the bottom surface of the thick nut, a plug hole is formed at the lower end of the bolt, and the limiting assembly includes a limiting plate inserted into the plug hole and located in one of the slots.

[0011] Preferably, the length of the limiting plate is longer than the distance between opposite sides of the thick nut, and baffles are hinged at both ends of the limiting plate.

[0012] Preferably, a thin nut located above a thick nut is threadedly sleeved on the bolt, and a gasket is provided above the thin nut.

[0013] To sum up, the technical effects and advantages of the present application are as follows: compared with the existing devices, the wind power low-temperature earthquake-resistant and anti-loosening fastener is provided with a screw, a cavity, a slider, a spring, a through hole, and a top ball. The screw is rotated to move downward, thereby driving the slider to move downward, and the top ball moves outward, thereby achieving the top ball's resistance to the mounting hole, thereby improving the stability of the bolt. Compared with the existing devices, it avoids the problem of the bolt shaking in the mounting hole and damaging the thread, thereby improving the stability of the fastener. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of this application;

[0016] Figure 3 for Figure 2 A magnified detail in the middle;

[0017] Figure 4 It is a schematic diagram of the structure at the limiting plate.

[0018] In the figure: 1. bolt; 2. threaded hole; 3. screw; 4. cavity; 5. slider; 6. spring; 7. through hole; 8. top ball; 9. thick nut; 10. limit ring; 11. notch; 12. socket; 13. limit plate; 14. baffle; 15. thin nut; 16. gasket. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0020] Reference Figure 1-3A wind power low-temperature anti-seismic and anti-loosening fastener comprises a bolt 1. When in use, the bolt 1 should be inserted into the mounting holes of two mounting parts to be connected. A threaded hole 2 is provided on the top of the bolt 1, and a fixing screw 3 is provided in the threaded hole 2. A cylindrical cavity 4 is provided at the lower end of the threaded hole 2. A slider 5 is slidably provided at the upper end of the cavity 4, and the side surface of the slider 5 is fitted with the side surface of the cavity 4. A spring 6 in a compressed state is provided between the bottom surface of the slider 5 and the bottom surface of the cavity 4. A plurality of through holes 7 are provided in a circumferential array on the side surface of the cavity 4, and a top ball 8 is slidably provided in the through hole 7, and the diameter of the top ball 8 is greater than the depth of the through hole 7. By rotating the screw 3 , the screw 3 moves downward, thereby driving the slider 5 to move downward, and the top ball 8 moves outward, so as to achieve the resistance of the top ball 8 to the mounting hole, thereby improving the stability of the bolt 1. Compared with the existing device, it avoids the problem that the bolt 1 may shake in the mounting hole and damage the thread, and improves the stability of the fastener. A thick nut 9 is threadedly sleeved on the lower end of the bolt 1, and a limiting component for limiting the thick nut 9 is provided on the side of the thick nut 9 facing away from the bolt 1. The fastener is anti-vibration and anti-loosening through the limiting component. In addition, the fastener does not use materials that are easily affected by low temperatures, such as rubber and nylon, and can resist low temperatures to a certain extent.

[0021] Reference Figure 2-4 A limiting ring 10 for limiting the position of the top ball 8 is fixedly connected to one end of the through hole 7 facing away from the cavity 4 , and the inner ring diameter of the limiting ring 10 is smaller than the diameter of the top ball 8 .

[0022] The upper end of the slider 5 is cylindrical and the lower end is truncated cone-shaped. The lower end of the truncated cone-shaped slider 5 can drive the top ball 8 to move outward during the downward movement. When the slider 5 is located at the top of the cavity 4, one side of the top ball 8 is in contact with the side of the slider 5 and the other side is flush with the outer side of the limit ring 10. At this time, the top ball 8 is in the initial position and will not interfere with the insertion of the bolt 1 into the mounting hole.

[0023] A plurality of slots 11 are provided in a circular array on the bottom surface of the thick nut 9, a socket 12 is provided at the lower end of the bolt 1, and the limiting assembly includes a limiting plate 13 which is inserted into the socket 12 and is located in one of the slots 11. The limiting plate 13 is used to limit the thick nut 9 to prevent the thick nut 9 from loosening or even detaching from the bolt 1 due to vibration.

[0024] The length of the limiting plate 13 is longer than the distance between the opposite sides of the thick nut 9, and baffles 14 are hinged at both ends of the limiting plate 13, and the baffles 14 are used to limit the two sides of the limiting plate 13 to prevent the limiting plate 13 from being disturbed during operation and detaching from the socket 12.

[0025] Reference Figure 2A thin nut 15 located above the thick nut 9 is threadedly sleeved on the bolt 1. The thin nut 15 cooperates with the thick nut 9 to achieve earthquake resistance and loosening prevention. The thin nut 15 is selected to cooperate with the thick nut 9 instead of two thick nuts 9 in order to control costs. A gasket 16 is provided above the thin nut 15. The gasket 16 can make the pressure between the thin nut 15 and the mounting part to be connected as even as possible, thereby improving the tightness.

[0026] Working principle:

[0027] When using the wind power low-temperature earthquake-resistant and anti-loosening fastener, the bolt 1 is placed in the mounting holes of the two mounting parts to be connected, and the screw 3 is screwed into the threaded hole 2. The lower end of the screw 3 presses the slider 5 to slide downward, and the side of the slider 5 presses the top bead 8 to move outward until all the top beads 8 are in conflict with the mounting holes. At this time, the gasket 16, the thin nut 15, and the thick nut 9 are screwed in from the lower end of the bolt 1 in sequence. After tightening, the plug plate is inserted into the plug hole 12, and the baffles 14 at both ends are rotated upward until the baffles 14 and the sides of the thick nut 9 are in contact. All the fixing steps of the wind power low-temperature earthquake-resistant and anti-loosening fastener are completed. When disassembly is required, the baffle 14 is rotated to a horizontal position and the plug plate is pulled out, and then the thick nut 9, the thin nut 15, and the gasket 16 are screwed out in sequence, and then the screw 3 is screwed out, and the top bead 8 returns to the initial position, that is, all the disassembly steps of the wind power low-temperature earthquake-resistant and anti-loosening fastener are completed.

[0028] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and utility model concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A wind power low-temperature anti-seismic and anti-loosening fastener, comprising a bolt (1), characterized in that: The top of the bolt (1) is provided with a threaded hole (2), and a screw (3) is provided in the threaded hole (2). The lower end of the threaded hole (2) is provided with a cylindrical cavity (4). A slider (5) is slidably provided at the upper end of the cavity (4), and the side surface of the slider (5) is in contact with the side surface of the cavity (4). A spring (6) in a compressed state is provided between the bottom surface of the slider (5) and the bottom surface of the cavity (4). A plurality of through holes (7) are provided in a circular array on the side surface of the cavity (4), and a top ball (8) is slidably provided in the through hole (7), and the diameter of the top ball (8) is greater than the depth of the through hole (7). A thick nut (9) is threadedly sleeved at the lower end of the bolt (1), and a limiting component for limiting the position of the thick nut (9) is provided on the side of the thick nut (9) facing away from the bolt (1).

2. A wind power low temperature anti-seismic and anti-loosening fastener according to claim 1, characterized in that: A limiting ring (10) for limiting the position of the top ball (8) is fixedly connected to one end of the through hole (7) facing away from the cavity (4), and the inner ring diameter of the limiting ring (10) is smaller than the diameter of the top ball (8).

3. A wind power low temperature earthquake resistant and anti-loosening fastener according to claim 2, characterized in that: The upper end of the slider (5) is cylindrical and the lower end is truncated cone-shaped, and when the slider (5) is located at the top of the cavity (4), one side of the top bead (8) is in contact with the side surface of the slider (5) and the other side is flush with the outer side of the limit ring (10).

4. A wind power low temperature anti-seismic and anti-loosening fastener according to claim 1, characterized in that: The bottom surface of the thick nut (9) is provided with a plurality of slots (11) in a circumferential array, the lower end of the bolt (1) is provided with an insertion hole (12), and the limiting assembly comprises a limiting plate (13) inserted into the insertion hole (12) and located in one of the slots (11).

5. A wind power low temperature earthquake resistant and anti-loosening fastener according to claim 4, characterized in that: The length of the limiting plate (13) is longer than the distance between opposite sides of the thick nut (9), and baffles (14) are hingedly connected at both ends of the limiting plate (13).

6. A wind power low temperature earthquake resistant and anti-loosening fastener according to claim 1, characterized in that: A thin nut (15) is threadedly sleeved on the bolt (1) and is located above the thick nut (9). A gasket (16) is provided above the thin nut (15).

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