Lock bolt and nut assembly

Abstract

The utility model relates to the technical field of fasteners, in particular to an anti-loose bolt and nut assembly which comprises a bolt body and a nut body connected to the bolt body in a screwed mode, the threaded end of the bolt body is connected with a screw, the screw is sleeved with a circular ring body, the screw is connected with a locking nut in a screwed mode, and the locking nut is connected with the bolt body in a screwed mode. The outer circle of the circular ring body is connected with a supporting plate, the supporting plate is connected with an elastic telescopic rod assembly, the end, away from the supporting plate, of the elastic telescopic rod assembly is connected with a conical body, and the end face of the nut body is provided with a conical groove matched with the conical body. By means of the mode, the lock bolt and nut assembly solves the problem that the lock effect is poor.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to an anti-loosening bolt and nut assembly. Background Technology

[0002] A bolt is a mechanical part, a cylindrical threaded fastener used with a nut. It consists of a head and a shank (a cylinder with external threads), and requires a nut to fasten two parts with through holes; this type of connection is called a bolted connection. When the nut is unscrewed from the bolt, the two parts can be separated; therefore, a bolted connection is a detachable connection.

[0003] Regarding the aforementioned technologies, the inventors discovered that when bolts are used on mechanical equipment, because the equipment is under vibration for extended periods, ordinary bolts and nuts, when connected by threads, are prone to loosening due to the nut rotating in the opposite direction caused by vibration, thus reducing the effectiveness of the bolts. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide an anti-loosening bolt and nut assembly, which solves the problem of poor anti-loosening effect.

[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: a bolt and nut assembly is provided, comprising: a bolt body and a nut body screwed onto the bolt body; a threaded end of the bolt body is connected to a screw rod; an annular body is fitted onto the screw rod; a locking nut is screwed onto the screw rod; a support plate is connected to the outer circle of the annular body; an elastic telescopic rod assembly is connected to the support plate; a conical body is connected to the end of the elastic telescopic rod assembly away from the support plate; and a conical groove adapted to the conical body is provided on the end face of the nut body.

[0006] By adopting the above technical solution, during use, the bolt body passes through two parts with through holes and is threadedly connected to the nut body. After the nut body comes into close contact with one of the parts, the ring is fitted onto the outer circle of the bolt. Rotating the locking nut drives the elastic telescopic rod assembly to move towards the nut body. The conical body on the elastic telescopic rod assembly extends into the conical groove. Continuing to rotate the locking nut causes the elastic telescopic rod assembly to be squeezed and contracted, making the conical body come into close contact with the conical groove, thereby preventing the nut body from rotating in the opposite direction, achieving the purpose of preventing the bolt from loosening and improving the performance.

[0007] In a preferred embodiment, the present invention can be further configured as follows: the elastic telescopic rod assembly includes a tube and a spring disposed in its inner cavity, a cylinder is inserted through the inner hole at one end of the tube, and the cone is connected to the other end, one end of the spring is in contact with the cone, and the other end is in contact with the cylinder, the end of the cylinder away from the spring is connected to a support plate, and a limiting member is also included to prevent the cylinder from detaching from the tube.

[0008] By adopting the above technical solution, the support plate drives the cylinder and the tube to move towards each other, the cylinder compresses the spring, and the spring drives the cone to make close contact with the conical groove.

[0009] In a preferred embodiment, the present invention can be further configured such that: the limiting member includes a rectangular limiting groove disposed on the outer circle of the tube, a limiting rod passing through the rectangular limiting groove, and the limiting rod being connected to the cylinder.

[0010] By adopting the above technical solution, since the limiting rod is located in the rectangular limiting groove and is connected to the cylinder, it prevents the cylinder from leaving the inner cavity of the tube, thus achieving the purpose of limiting.

[0011] In a preferred embodiment, the present invention can be further configured such that the thread direction of the screw is opposite to the thread direction on the bolt body.

[0012] By adopting the above technical solution, since the thread direction of the screw is opposite to the thread direction on the bolt body, when the nut body loosens in the opposite direction, it drives the locking nut to be tightly connected with the ring body, and the conical body prevents the nut body from rotating in the opposite direction, thus having an interlocking function.

[0013] In a preferred embodiment, the present invention can be further configured such that the compressed length of the spring is not less than six thread pitches on the bolt body.

[0014] By adopting the above technical solution, the spring can be compressed to an appropriate distance, thereby driving the cone to make close contact with the cone groove.

[0015] In a preferred embodiment, the present invention can be further configured such that the inner hole of the locking nut is coated with thread-locking adhesive.

[0016] By adopting the above technical solution, the connection between the lock nut and the screw is strengthened by applying thread-locking adhesive to the inner hole of the lock nut.

[0017] In summary, this utility model has at least one of the following beneficial technical effects:

[0018] The conical body on the elastic telescopic rod assembly extends into the conical groove. Continuing to rotate the locking nut causes the elastic telescopic rod assembly to be compressed and contracted, making the conical body and the conical groove come into close contact, thereby preventing the nut body from rotating in the opposite direction, achieving the purpose of preventing the bolt from loosening and improving the performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 This is a schematic diagram of a preferred embodiment of an anti-loosening bolt and nut assembly according to the present invention.

[0021] Figure 2 yes Figure 1 Exploded view of the flexible telescopic rod assembly.

[0022] In the diagram: 1. Bolt body; 2. Nut body; 3. Screw; 4. Ring; 5. Locking nut;

[0023] 6. Support plate; 70. Elastic telescopic rod assembly; 8. Conical body; 9. Conical groove;

[0024] 71. Tube body; 72. Spring; 73. Cylinder; 74. Limiting component;

[0025] 741. Rectangular limiting groove; 742. Limiting rod. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] Reference Figures 1-2This utility model discloses an anti-loosening bolt and nut assembly, comprising: a bolt body 1 and a nut body 2 screwed onto the bolt body 1; a screw rod 3 is connected to the threaded end of the bolt body 1; an annular body 4 is sleeved on the screw rod 3; a locking nut 5 is screwed onto the screw rod 3; a support plate 6 is connected to the outer circle of the annular body 4; an elastic telescopic rod assembly 70 is connected to the support plate 6; a conical body 8 is connected to the end of the elastic telescopic rod assembly 70 away from the support plate 6; and a conical groove 9 adapted to the conical body 8 is provided on the end face of the nut body 2.

[0029] The elastic telescopic rod assembly 70 includes a tube 71 and a spring 72 disposed in its inner cavity. A cylinder 73 passes through the inner hole of one end of the tube 71, and the other end is connected to the conical body 8. One end of the spring 72 is in contact with the conical body 8, and the other end is in contact with the cylinder 73. The end of the cylinder 73 away from the spring 72 is connected to the support plate 6. The assembly also includes a limiting member 74 to prevent the cylinder 73 from detaching from the tube 71. The support plate 6 drives the cylinder 73 to move towards the tube 71, and the cylinder 73 compresses the spring 72. The spring 72 drives the conical body 8 to make close contact with the conical groove 9.

[0030] The limiting member 74 includes a rectangular limiting groove 741 provided on the outer circle of the tube body 71, and a limiting rod 742 passing through the rectangular limiting groove 741. The limiting rod 742 is connected to the cylinder 73. Since the limiting rod 742 is located in the rectangular limiting groove 741 and is connected to the cylinder 73, it prevents the cylinder 73 from leaving the inner cavity of the tube body 71, thereby achieving the purpose of limiting.

[0031] The thread direction of the screw 3 is opposite to that of the thread direction on the bolt body 1. Since the thread direction of the screw 3 is opposite to that of the thread direction on the bolt body 1, when the nut body 2 loosens in the opposite direction, it drives the locking nut 5 to be tightly connected with the ring body 4. The conical body 8 prevents the nut body 2 from rotating in the opposite direction, thus having an interlocking function.

[0032] The compressed length of the spring 72 is not less than 6 thread lengths on the bolt body 1; so that after the spring 72 is compressed to an appropriate distance, it can drive the cone 8 to make close contact with the cone groove 9.

[0033] The inner hole of the locking nut 5 is coated with thread-locking adhesive; by applying the thread-locking adhesive to the inner hole of the locking nut 5, the connection between the locking nut 5 and the screw 3 is strengthened.

[0034] The implementation principle of this embodiment is as follows: In use, the bolt body 1 passes through two parts with through holes and is threadedly connected to the nut body. After the nut body 2 comes into close contact with one of the parts, the ring 4 is fitted onto the outer circle of the screw 3. Rotating the locking nut 5 drives the elastic telescopic rod assembly 70 to move toward the nut body 2. The conical body 8 on the elastic telescopic rod assembly 70 extends into the conical groove 9. Continuing to rotate the locking nut 5 causes the elastic telescopic rod assembly 70 to be squeezed and contracted, so that the conical body 8 comes into close contact with the conical groove 9, thereby preventing the nut body 2 from rotating in the opposite direction, achieving the purpose of preventing the bolt from loosening and improving the use effect.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An anti-loosening bolt and nut assembly, comprising: The bolt body (1) and the nut body (2) screwed onto the bolt body (1) are characterized in that a screw rod (3) is connected to the threaded end of the bolt body (1), an annular body (4) is sleeved on the screw rod (3), a locking nut (5) is screwed onto the screw rod (3), a support plate (6) is connected to the outer circle of the annular body (4), an elastic telescopic rod assembly (70) is connected to the support plate (6), a conical body (8) is connected to the end of the elastic telescopic rod assembly (70) away from the support plate (6), and a conical groove (9) adapted to the conical body (8) is provided on the end face of the nut body (2).

2. The anti-loosening bolt and nut assembly according to claim 1, characterized in that, The elastic telescopic rod assembly (70) includes a tube (71) and a spring (72) disposed in its inner cavity. A cylinder (73) is inserted through the inner hole of one end of the tube (71), and the other end is connected to the cone (8). One end of the spring (72) is in contact with the cone (8), and the other end is in contact with the cylinder (73). The end of the cylinder (73) away from the spring (72) is connected to the support plate (6). The assembly also includes a limiting member (74) to prevent the cylinder (73) from detaching from the tube (71).

3. The anti-loosening bolt and nut assembly according to claim 2, characterized in that, The limiting member (74) includes a rectangular limiting groove (741) provided on the outer circle of the tube body (71), and a limiting rod (742) is provided inside the rectangular limiting groove (741), and the limiting rod (742) is connected to the cylinder (73).

4. The anti-loosening bolt and nut assembly according to claim 1, characterized in that, The thread direction of the screw (3) is opposite to the thread direction on the bolt body (1).

5. The anti-loosening bolt and nut assembly according to claim 2, characterized in that, The compressed length of the spring (72) is not less than 6 pitch lengths on the bolt body (1).

6. The anti-loosening bolt and nut assembly according to claim 1, characterized in that, The inner hole of the locking nut (5) is coated with thread-locking adhesive.

Images