High-strength special-shaped fastener

Abstract

The utility model discloses a high-strength special-shaped fastener. The high-strength special-shaped fastener comprises a bolt, the outer side surface of the bolt is in threaded connection with a nut, the lower end of the bolt is fixedly connected with a positioning seat, the lower end of the positioning seat is provided with a mounting seat, the lower end of the mounting seat is rotatably connected with four clamping strips, the outer side surface of the positioning seat is provided with uniformly distributed avoiding grooves, and the clamping strips are respectively located in the adjacent avoiding grooves; an adjusting column is in threaded connection with the interior of the bolt, an end cover is arranged at the lower end of the adjusting column, the lower end of the clamping strip and the mounting base are both located in the end cover, a limiting base is slidably connected with the interior of the bolt, spring pieces which are evenly distributed are fixedly connected with the lower end of the limiting base, and a rectangular groove is formed in the inner wall of the receding groove of the positioning base; according to the high-strength special-shaped fastener, the clamping strips at the lower end of the high-strength special-shaped fastener can be automatically opened and retracted, and parts can be conveniently assembled and disassembled in a narrow space.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a high-strength special-shaped fastener. Background Art

[0002] Fasteners are a type of mechanical part used for fastening connections and are extremely widely used. They are used in a wide range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics, and more. They can be found in a variety of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, meters, and supplies. They are the most widely used basic mechanical components.

[0003] When assembling parts in certain confined spaces, workers are required to tighten the studs while fixing the nuts at the bottom of the parts. Due to space limitations, it is difficult to fix the nuts, making tightening the bolts very difficult and disassembly equally laborious. To address this, we propose high-strength special-shaped fasteners. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-strength special-shaped fastener. The locking strip at the lower end can be automatically opened and retracted, which is convenient for loading and unloading parts in a narrow space and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present utility model provides the following technical solutions: a high-strength special-shaped fastener, comprising a bolt;

[0006] Bolt: The outer side of the bolt is threaded with a nut, the lower end of the bolt is fixedly connected to a positioning seat, the lower end of the positioning seat is provided with a mounting seat, the lower end of the mounting seat is rotatably connected to four positioning strips, the outer side of the positioning seat is provided with evenly distributed avoidance grooves, the positioning strips are respectively located inside adjacent avoidance grooves, the internal thread of the bolt is connected to an adjusting column, the lower end of the adjusting column is provided with an end cover, the lower end of the positioning strip and the mounting seat are both located inside the end cover, the positioning strip at the lower end can be automatically opened and retracted, which is convenient for loading and unloading parts in narrow spaces.

[0007] Furthermore, the internal sliding connection of the bolt is connected to a limit seat, the lower end of the limit seat is fixedly connected with evenly distributed spring sheets, the inner wall of the avoidance groove of the positioning seat is provided with a rectangular groove, the lower ends of the spring sheets pass through the adjacent rectangular grooves and contact the inner side surfaces of the internal locking strips of the avoidance groove, thereby realizing automatic opening of the locking strips.

[0008] Furthermore, a spring is placed inside the bolt, and the spring is located between the limit seat and the top wall of the bolt. The spring is movably sleeved on the outside of the adjustment column to keep the position of the spring sheet unchanged.

[0009] Furthermore, the lower inner end of the integral body formed by the positioning seat and the bolt is provided with evenly distributed limiting strips, and the limiting seat is slidably connected between the limiting strips to prevent the spring sheet from escaping from the rectangular groove.

[0010] Furthermore, the upper end of the inner wall of the end cover is a conical inclined surface to prevent the locking strip from detaching.

[0011] Furthermore, an external fixing sleeve at the upper end of the adjusting column is provided with an adjusting knob, and the adjusting knob is located at the upper end of the bolt, and the adjusting column is rotated.

[0012] Furthermore, the outer arc surface of the nut is provided with evenly distributed wrenches to facilitate the rotation of the nut.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the high-strength special-shaped fastener has the following advantages:

[0014] By twisting the adjusting column, the end cover no longer restricts the positioning strip, and the spring sheet pushes the positioning strip outward. The two parts are clamped between the positioning strip and the nut to achieve tightening. The personnel only need to twist the nut, and the lower end of the part does not need to be fixed by hand, which is easy to use. When disassembling, loosen the nut, twist the adjusting column, reset the end cover, and the positioning strip is pushed back by the end cover to the inside of the avoidance groove of the positioning seat, making it easy to remove the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the bolt of the utility model;

[0018] Figure 4 This is a structural diagram of the clamping strip of the utility model.

[0019] In the figure: 1 bolt, 2 positioning seat, 3 rectangular groove, 4 mounting seat, 5 positioning strip, 6 end cover, 7 adjusting column, 8 spring sheet, 9 limit seat, 10 spring, 11 adjusting knob, 12 nut, 13 wrench, 14 limit strip. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4 ,This embodiment provides a technical solution: a high-strength special-shaped fastener, including a bolt 1;

[0022] Bolt 1: The outer side of the bolt is threadedly connected with a nut 12, the lower end of the bolt 1 is fixedly connected to the positioning seat 2, the lower end of the positioning seat 2 is provided with a mounting seat 4, the lower end of the mounting seat 4 is rotatably connected with four card strips 5, the outer side of the positioning seat 2 is provided with evenly distributed avoidance grooves, the card strips 5 are respectively located inside the adjacent avoidance grooves, the internal thread of the bolt 1 is connected with an adjusting column 7, the lower end of the adjusting column 7 is provided with an end cover 6, the lower end of the card strip 5 and the mounting seat 4 are both located inside the end cover 6, the internal sliding connection of the bolt 1 is limited to a limit seat 9, the lower end of the limit seat 9 is fixedly connected with an evenly distributed spring sheet 8, the inner wall of the avoidance groove of the positioning seat 2 is provided with a rectangular Slot 3, the lower ends of the spring sheets 8 pass through the adjacent rectangular slots 3 respectively and contact the inner side surfaces of the positioning strips 5 inside the avoidance slots. A spring 10 is placed inside the bolt 1, and the spring 10 is located between the limit seat 9 and the top wall of the bolt 1. The spring 10 is movably sleeved on the outside of the adjusting column 7. The lower end of the inner part of the whole composed of the positioning seat 2 and the bolt 1 is provided with evenly distributed limit strips 14, and the limit seat 9 is slidably connected between the limit strips 14. The upper end of the inner wall of the end cover 6 is a conical inclined surface, and the upper end of the external fixed sleeve of the adjusting column 7 is provided with an adjusting knob 11. The adjusting knob 11 is located at the upper end of the bolt 1, and the outer arc surface of the nut 12 is provided with evenly distributed wrenches 13.

[0023] The working principle of the high-strength special-shaped fastener provided by the utility model is as follows: align the screw holes of the two parts to be fixed, insert the bolt 1 into the inside of the screw hole, turn the adjusting knob 11, the adjusting column 7 descends inside the bolt 1, the end cover 6 descends, and no longer restricts the blocking strip 5. The spring piece 8 pushes the blocking strip 5 outward, and the spring 10 keeps the spring piece 8 in the position of the rectangular groove 3. The limiting strip 14 prevents the limiting seat 9 from rotating and causing the spring piece 8 to disengage from the rectangular groove 3. The outer side surface of the blocking strip 5 contacts the conical inclined surface of the end cover 6 to prevent the blocking strip 5 from disengaging. Then, the nut 12 is turned by the wrench 13, and the upper end of the blocking strip 5 presses the part at the lower end, and the nut 12 presses the part at the upper end to achieve fastening.

[0024] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. High-strength special-shaped fasteners, characterized by: including a bolt (1); Bolt (1): The outer side surface of the bolt (1) is threadedly connected to a nut (12); the lower end of the bolt (1) is fixedly connected to a positioning seat (2); the lower end of the positioning seat (2) is provided with a mounting seat (4); the lower end of the mounting seat (4) is rotatably connected to four clamping strips (5); the outer side surface of the positioning seat (2) is provided with evenly distributed avoidance grooves; the clamping strips (5) are respectively located inside adjacent avoidance grooves; the inner surface of the bolt (1) is threadedly connected to an adjustment column (7); the lower end of the adjustment column (7) is provided with an end cover (6); the lower end of the clamping strip (5) and the mounting seat (4) are both located inside the end cover (6).

2. The high-strength special-shaped fastener according to claim 1, characterized in that: The inner sliding connection of the bolt (1) is connected to a limit seat (9), the lower end of the limit seat (9) is fixedly connected to uniformly distributed spring sheets (8), the inner wall of the avoidance groove of the positioning seat (2) is provided with rectangular grooves (3), the lower ends of the spring sheets (8) respectively pass through adjacent rectangular grooves (3) and contact the inner side surfaces of the internal locking strips (5) of the avoidance groove.

3. The high-strength special-shaped fastener according to claim 2, characterized in that: A spring (10) is placed inside the bolt (1), and the spring (10) is located between the limiting seat (9) and the top wall of the bolt (1). The spring (10) is movably sleeved on the outside of the adjusting column (7).

4. The high-strength special-shaped fastener according to claim 2, characterized in that: The lower inner end of the integral body formed by the positioning seat (2) and the bolt (1) is provided with evenly distributed limiting strips (14), and the limiting seat (9) is slidably connected between the limiting strips (14).

5. The high-strength special-shaped fastener according to claim 1, characterized in that: The upper end of the inner wall of the end cover (6) is a conical inclined surface.

6. The high-strength special-shaped fastener according to claim 1, characterized in that: An external fixed sleeve at the upper end of the adjusting column (7) is provided with an adjusting knob (11), and the adjusting knob (11) is located at the upper end of the bolt (1).

7. The high-strength special-shaped fastener according to claim 1, characterized in that: The outer arc surface of the nut (12) is provided with evenly distributed wrenches (13).

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