U-shaped bolt not easy to loosen

Abstract

The utility model discloses a U-shaped bolt not easy to loosen, which comprises a bolt main body, a nut and a compression spring, the bolt main body is U-shaped and comprises two parallel straight rods, the tail ends of the straight rods are provided with threaded sections, the nut is screwed on the threaded sections, the threaded sections are provided with a circle of clamping groove, the clamping groove is closer to the tail ends of the threaded sections than the nut, and the compression spring is arranged in the clamping groove. The compression spring is composed of a first insertion rod, a tower spring, a straight spring and a second insertion rod which are sequentially connected, the small-diameter end of the tower spring abuts against the side wall, away from the nut, of the clamping groove, a first insertion hole is formed in the side wall, away from the nut, of the clamping groove, the first insertion rod is inserted into the first insertion hole, one end of the straight spring is connected with the large-diameter end of the tower spring, and the other end of the straight spring is connected with the second insertion rod. The other end of the straight spring abuts against the nut, a plurality of second inserting holes are formed in the nut, and the second inserting rod is inserted into one of the second inserting holes. The nut is pressed by the pressure spring, so that the nut is not easy to loosen during use, the fastening effect of the U-shaped bolt is ensured, and the U-shaped bolt is not easy to lose efficacy.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, especially the technical field of U-bolts.

Background Art

[0002] U-bolt fasteners are important spare parts for installing and clamping objects or components. They are widely used in power facilities, equipment installation, and mechanical part connection and fixation, and the demand and usage are relatively large, especially in various heavy-duty trucks or small cars. During use, U-bolts generally need to be used in cooperation with nuts. It is easy for the nuts to become loose from the U-bolts. Once the nuts become loose, the fastening effect of the U-bolts will fail, posing a safety hazard.

Content of the Utility Model

[0003] The purpose of the utility model is to solve the problems in the prior art, and a U-bolt that is not easy to become loose is proposed, which can prevent the nuts on the U-bolts from becoming loose and ensure the fastening effect of the U-bolts.

[0004] To achieve the above purpose, the utility model proposes a U-bolt that is not easy to become loose, including a bolt body, a nut, and a compression spring. The bolt body is U-shaped and consists of two parallel straight rods. The ends of the straight rods are provided with threaded sections, and nuts are screwed onto the threaded sections. A circular groove is provided on the threaded section, and the groove is closer to the end of the threaded section than the nut. The compression spring is composed of a first insertion rod, a conical spring, a straight spring, and a second insertion rod connected in sequence. The small-diameter end of the conical spring abuts against the side wall of the groove away from the nut. A first insertion hole is provided on the side wall of the groove away from the nut, and the first insertion rod is inserted into the first insertion hole. One end of the straight spring is connected to the large-diameter end of the conical spring, and the other end of the straight spring abuts against the nut. A plurality of second insertion holes are provided on the nut, and the second insertion rod is inserted into one of the second insertion holes. The compression spring is in a compressed state. After the compression spring is twisted, the second insertion rod is inserted into the second insertion hole, and the tendency of the compression spring to return to its state before twisting applies a force to tighten the nut.

[0005] Preferably, the nut is a hexagonal nut, and six second insertion holes are evenly distributed on the nut and located on the same circumference.

[0006] Preferably, there is a clearance fit between the first insertion rod and the first insertion hole, and a clearance fit between the second insertion rod and the second insertion hole.

[0007] Preferably, the side wall of the groove close to the nut is a conical wall, and the width of the open end of the groove is greater than the width of the bottom of the groove.

[0008] Preferably, the end of the threaded section is provided with a chamfered fillet.

[0009] Advantages of the present utility model: By pressing the compression spring against the nut, the nut is not likely to loosen during use, ensuring the fastening effect of the U-bolt and preventing it from failing easily. The side wall of the slot near the nut is a conical wall, making it difficult for the compression spring to be hooked by the edge of the slot, and the compression spring is not easily damaged.

[0010] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

Explanation of the Drawings

[0011] Figure 1 is the front view of the non-loosening U-bolt of the present utility model;

[0012] Figure 2 is the front sectional view of the non-loosening U-bolt of the present utility model.

[0013] In the figure: 1 - bolt body, 2 - nut, 3 - compression spring, 10 - straight rod, 11 - threaded section, 12 - slot, 13 - first insertion hole, 20 - second insertion hole, 31 - first insertion rod, 32 - conical spring, 33 - straight spring, 34 - second insertion rod.

Specific Embodiments

[0014] Referring to Figure 1 、 Figure 2 , the non-loosening U-bolt of the present utility model includes a bolt body 1, a nut 2, and a compression spring 3. The bolt body 1 is U-shaped and includes two parallel straight rods 10. The ends of the straight rods 10 are provided with threaded sections 11, and a nut 2 is screwed on the threaded sections 11. A circle of slots 12 is provided on the threaded sections 11, and the slots 12 are closer to the ends of the threaded sections 11 than the nut 2. The compression spring 3 is composed of a first insertion rod 31, a conical spring 32, a straight spring 33, and a second insertion rod 34 connected in sequence. The small-diameter end of the conical spring 32 abuts against the side wall of the slot 12 away from the nut 2. A first insertion hole 13 is provided on the side wall of the slot 12 away from the nut 2, and the first insertion rod 31 is inserted into the first insertion hole 13. One end of the straight spring 33 is connected to the large-diameter end of the conical spring 32, and the other end of the straight spring 33 abuts against the nut 2. A plurality of second insertion holes 20 are provided on the nut 2, and the second insertion rod 34 is inserted into one of the second insertion holes 20. The compression spring 3 is in a compressed state. After the compression spring 3 is twisted, the second insertion rod 34 is inserted into the second insertion hole 20, and the tendency of the compression spring 3 to return to the state before twisting applies a force to tighten the nut 2.

[0015] The nut 2 is a hexagonal nut 2, and six second insertion holes 20 are evenly distributed on the nut 2, and the second insertion holes 20 are located on the same circumference.

[0016] There is a clearance fit between the first insertion rod 31 and the first insertion hole 13, and a clearance fit between the second insertion rod 34 and the second insertion hole 20.

[0017] The side wall of the card slot 12 close to the nut 2 is a conical wall, and the width of the open end of the card slot 12 is greater than the width of the bottom of the card slot 12.

[0018] The end of the threaded section 11 is provided with a chamfer.

[0019] The working process of the present utility model:

[0020] During the working process of the U-shaped bolt of the present utility model that is not prone to loosening, after installing the bolt body 1, the nut 2 is screwed on. After the nut 2 is tightened, the compression spring 3 is installed on the straight rod 10. The first insertion rod 31 on the compression spring 3 is inserted into the first insertion hole 13, and the compression spring 3 is twisted to insert the second insertion rod 34 on it into the second insertion hole 30 of the nut 3. The twisting direction of the compression spring 3 needs to ensure that the tendency of the compression spring 3 to return to the state before twisting applies a force to tighten the nut 2 to the nut 2. Since the compression nut 2 is subjected to a downward pressure and a force to tighten it at this time, the nut 2 is not prone to loosening.

[0021] The above embodiments are illustrative of the present utility model, not restrictive thereof. Any solution obtained by simply changing the present utility model falls within the protection scope of the present utility model.

Claims

1. U-bolts that are not easy to loosen, characterized by: The invention comprises a bolt body (1), a nut (2), and a compression spring (3). The bolt body (1) is U-shaped and comprises two parallel straight rods (10). The ends of the straight rods (10) are provided with threaded sections (11). The nut (2) is screwed onto the threaded sections (11). The threaded sections (11) are provided with a circle of clamping grooves (12). The clamping grooves (12) are closer to the ends of the threaded sections (11) than the nut (2). The compression spring (3) is composed of a first plug rod (31), a tower spring (32), a straight spring (33), and a second plug rod (34) connected in sequence. The small diameter end of the tower spring (32) abuts against the side of the clamping groove (12) away from the nut (2). The first plug hole (13) is provided on the side wall of the slot (12) away from the nut (2), the first plug rod (31) is inserted into the first plug hole (13), one end of the straight spring (33) is connected to the large diameter end of the tower spring (32), the other end of the straight spring (33) is against the nut (2), a plurality of second plug holes (20) are provided on the nut (2), the second plug rod (34) is inserted into one of the second plug holes (20), the clamping spring (3) is in a compressed state, after the clamping spring (3) is twisted, the second plug rod (34) is inserted into the second plug hole (20), the tendency of the clamping spring (3) to restore the state before twisting exerts a force on the nut (2) to tighten the nut (2).

2. The U-bolt that is not easy to loosen according to claim 1, characterized in that: The nut (2) is a hexagonal nut (2), and six second insertion holes (20) are evenly distributed on the nut (2), and the second insertion holes (20) are located on the same circumference.

3. The U-shaped bolt that is not easy to loosen according to claim 1, characterized in that: There is a clearance fit between the first insertion rod (31) and the first insertion hole (13), and there is a clearance fit between the second insertion rod (34) and the second insertion hole (20).

4. The U-bolt that is not easy to loosen according to claim 1, characterized in that: The side wall of the clamping groove (12) close to the nut (2) is a tapered wall, and the width of the opening end of the clamping groove (12) is greater than the width of the groove bottom of the clamping groove (12).

5. The U-shaped bolt that is not easy to loosen according to claim 1, characterized in that: The end of the threaded section (11) is provided with a rounded corner.

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