Rotary knob type lock bolt and nut assembly

Abstract

The utility model relates to the technical field of bolts and nuts, in particular to a knob type lock bolt and nut assembly which comprises a bolt body and a nut body, the threaded end of the bolt body is concentrically connected with a hexagonal cylinder, a hexagonal block is arranged above the hexagonal cylinder, an inner hexagonal hole matched with the hexagonal cylinder is formed in the center of the hexagonal block, and the nut body is arranged in the inner hexagonal hole. Two elastic limiting rod assemblies are symmetrically connected to the periphery of the hexagonal block, an annular boss is concentrically connected to one end face of the nut body, and two limiting holes are symmetrically formed in the outer circle of the annular boss; the elastic limiting rod assembly comprises an elastic fixing rod, an elastic swinging rod and an elastic inserting rod, the elastic fixing rod and the elastic inserting rod are arranged in parallel, the two ends of the elastic swinging rod are connected with the ends of the elastic fixing rod and the elastic inserting rod correspondingly, and the end, away from the elastic swinging rod, of the elastic fixing rod is connected with the hexagonal block; and one end, far away from the elastic swinging rod, of the elastic inserting rod can extend into the corresponding limiting hole. The anti-loosening device is reasonable in structure and solves the problem that the anti-loosening effect is poor.

Description

Technical Field

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

[0002] Bolts and nuts are generally matching fasteners. The nut, also known as a threaded bolt, is a part that is screwed onto the bolt or threaded rod to provide a fastening effect. This type of connection is called a bolted connection. Since the nut can be 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 connected by threads are prone to loosening due to the vibration causing the nut to rotate in the opposite direction, thus reducing the effectiveness of the bolt-nut connection. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a torsion-type 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 twist-type anti-loosening bolt and nut assembly, comprising: a bolt body and a nut body spirally connected to the bolt body, wherein a hexagonal prism is concentrically connected to the threaded end of the bolt body, a hexagonal block is provided above the hexagonal prism, an inner hexagonal hole adapted to the hexagonal prism is provided at the center of the hexagonal block, two elastic limiting rod assemblies are symmetrically connected to the periphery of the hexagonal block, and a circular boss is concentrically connected to one end face of the nut body, wherein two limiting holes are symmetrically provided on the outer circle of the circular boss;

[0006] The elastic limiting rod assembly includes an elastic fixed rod, an elastic swing rod, and an elastic plug rod. The elastic fixed rod and the elastic plug rod are arranged in parallel. The two ends of the elastic swing rod are respectively connected to the ends of the elastic fixed rod and the elastic plug rod. The end of the elastic fixed rod away from the elastic swing rod is connected to a hexagonal block. The end of the elastic plug rod away from the elastic swing rod can extend into the corresponding limiting hole.

[0007] By adopting the above technical solution, in use, firstly, the bolt body is passed through the fastener, and the nut body is rotatably connected to the bolt body's thread. After the nut body presses against the fastener, it is tightly screwed together with the bolt body to achieve the purpose of locking. Next, use the fingers of both hands to bend the two elastic limiting rod assemblies outward at a certain angle, so that the hexagonal block is fitted onto the hexagonal prism, and the hexagonal block can slide along the hexagonal prism. Then, twist the elastic fixing rod and elastic swing rod on the elastic limiting rod assembly so that the elastic plug rod is aligned with the limiting hole on the outer circle of the annular boss. Slowly remove the force of bend the elastic limiting rod assembly outward with your fingers, and the elastic swing rod rebounds, causing the end of the elastic plug rod to extend into the limiting hole. Since the elastic fixing rod and elastic swing rod have a reverse elastic force to recover to the initial state after being twisted at a certain angle, there is a pre-tightening force on the nut body in the tightening direction, which has the effect of preventing the nut body from loosening.

[0008] In a preferred embodiment, the present invention can be further configured such that: an annular washer is concentrically connected to the end of the nut body away from the annular boss, and a plurality of limiting teeth with triangular cross sections are connected in an annular array to the end of the annular washer away from the nut body.

[0009] By adopting the above technical solution, the nut body moves toward the fastener, causing the limiting teeth on the annular washer to fit tightly with the fastener, increasing the friction between the annular washer and the fastener, and achieving the effect of preventing loosening.

[0010] In a preferred embodiment, the present invention can be further configured such that the elastic fixing rod, the elastic swing rod, and the elastic plug rod are an integrated structural design and are made of spring round steel.

[0011] By adopting the above technical solution, the elastic fixed rod, elastic swing rod, and elastic plug rod are made by bending spring round steel, which enhances the structural strength.

[0012] In a preferred embodiment, the present invention can be further configured such that the length of the hexagonal prism is 10 pitches greater than the thickness of the hexagonal block than the nut body.

[0013] By adopting the above technical solution, the hexagonal block can slide along the hexagonal prism over a large range, which facilitates manual operation of the two elastic limiting rod assemblies so that the elastic plug rod can extend into the corresponding limiting hole.

[0014] In a preferred embodiment, the present invention can be further configured such that the end of the elastic plug rod away from the elastic swing rod is chamfered.

[0015] By adopting the above technical solution, one end of the elastic plug rod is chamfered and has a guiding function, which improves the convenience of the elastic plug rod extending into the limiting hole.

[0016] In a preferred embodiment, the present invention can be further configured such that the elastic plug rod extends into the limiting hole to a depth of 3-5 mm.

[0017] By adopting the above technical solution, the elastic plug rod can be disengaged from the limiting hole by simply prying the two elastic limiting rod assemblies outward by a small distance, which improves the convenience of disassembly.

[0018] In summary, this utility model has at least one of the following beneficial technical effects:

[0019] By bending and twisting the two elastic limiting rod assemblies with your fingers, the elastic plug rod can be inserted into the corresponding limiting hole. Since the elastic fixing rod and elastic swing rod have a reverse elastic force to restore the initial state after being twisted at a certain angle, there is a pre-tightening force on the nut body in the tightening direction, which can prevent the nut body from loosening. Attached Figure Description

[0020] 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:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is an exploded schematic diagram of this utility model.

[0023] In the diagram: 1. Bolt body; 2. Nut body; 3. Hexagonal prism; 4. Hexagonal block; 5. Inner hexagonal hole; 60. Elastic limit rod assembly; 7. Circular boss; 8. Limiting hole; 9. Circular washer;

[0024] 11. Limiting teeth;

[0025] 61. Flexible fixed rod; 62. Flexible swing rod; 63. Flexible plug 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 1-2 This utility model discloses a torsion-type anti-loosening bolt and nut assembly, comprising: a bolt body 1 and a nut body 2 spirally connected to the bolt body 1. A hexagonal prism 3 is concentrically connected to the threaded end of the bolt body 1. A hexagonal block 4 is provided above the hexagonal prism 3. The center of the hexagonal block 4 is provided with an inner hexagonal hole 5 that is adapted to the hexagonal prism 3. Two elastic limiting rod assemblies 60 are symmetrically connected to the periphery of the hexagonal block 4. A circular boss 7 is concentrically connected to one end face of the nut body 2. Two limiting holes 8 are symmetrically provided on the outer circle of the circular boss 7.

[0029] The elastic limiting rod assembly 60 includes an elastic fixing rod 61, an elastic swing rod 62, and an elastic insertion rod 63. The elastic fixing rod 61 and the elastic insertion rod 63 are arranged in parallel. The two ends of the elastic swing rod 62 are connected to the ends of the elastic fixing rod 61 and the elastic insertion rod 63, respectively. The end of the elastic fixing rod 61 away from the elastic swing rod 62 is connected to the hexagonal block 4. The end of the elastic insertion rod 63 away from the elastic swing rod 62 can extend into the corresponding limiting hole 8. The depth of the elastic insertion rod 63 extending into the limiting hole 8 is 3-5mm. The elastic fixing rod 61, the elastic swing rod 62, and the elastic insertion rod 63 are designed as an integrated structure and are made of spring round steel. The elastic fixing rod 61, the elastic swing rod 62, and the elastic insertion rod 63 are made by bending spring round steel, which enhances the structural strength.

[0030] An annular washer 9 is concentrically connected to the end of the nut body 2 away from the annular boss 7. A number of limiting teeth 11 with triangular cross sections are connected in an annular array to the end of the annular washer 9 away from the nut body 2. The nut body 2 moves toward the fastener, causing the limiting teeth 11 on the annular washer 9 to fit tightly with the fastener, increasing the friction between the annular washer 9 and the fastener, and achieving the effect of preventing loosening.

[0031] The length of the hexagonal prism 3 is 10 threads larger than the thickness of the hexagonal block 4 than the nut body 2; this allows the hexagonal block 4 to slide along the hexagonal prism 3 over a larger range, facilitating manual operation of the two elastic limit rod assemblies 60 so that the elastic insertion rod 63 extends into the corresponding limit hole 8.

[0032] The end of the elastic plug rod 63 away from the elastic swing rod 62 is chamfered; the chamfered end of the elastic plug rod 63 also has a guiding function, which improves the convenience of the elastic plug rod 63 extending into the limiting hole 8.

[0033] The implementation principle of this embodiment is as follows: In use, firstly, the bolt body 1 is passed through the fastener, and the nut body 2 is rotatably connected to the thread of the bolt body 1. After the nut body 2 presses against the fastener, it is tightly screwed together with the bolt body 1 to achieve the purpose of locking. Next, the two elastic limiting rod assemblies 60 are bent outward at a certain angle with the fingers of both hands, so that the hexagonal block 4 is fitted onto the hexagonal prism 3, and the hexagonal block 4 can slide along the hexagonal prism 3. Then, the elastic limiting rod assembly 60 is twisted. The fixed rod 61 and the elastic swing rod 62 make the elastic plug rod 63 aligned with the limiting hole 8 on the outer circle of the annular boss 7. When the force of the finger slowly withdrawing the force that was prying the elastic limiting rod assembly 60 outwards is released, the elastic swing rod 62 rebounds and drives the end of the elastic plug rod 63 into the limiting hole 8. Since the elastic fixed rod 61 and the elastic swing rod 62 have a reverse elastic force to recover to the initial state after being twisted at a certain angle, there is a pre-tightening force on the nut body 2 in the tightening direction, which has the effect of preventing the nut body 2 from loosening.

[0034] 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 using 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. A torsion-type anti-loosening bolt and nut assembly, comprising: The bolt body (1) and the nut body (2) spirally connected to the bolt body (1) are characterized in that a hexagonal prism (3) is concentrically connected to the threaded end of the bolt body (1), a hexagonal block (4) is provided above the hexagonal prism (3), an inner hexagonal hole (5) adapted to the hexagonal prism (3) is provided at the center of the hexagonal block (4), two elastic limiting rod assemblies (60) are symmetrically connected around the periphery of the hexagonal block (4), and a circular boss (7) is concentrically connected to one end face of the nut body (2), and two limiting holes (8) are symmetrically provided on the outer circle of the circular boss (7). The elastic limiting rod assembly (60) includes an elastic fixing rod (61), an elastic swing rod (62), and an elastic plug rod (63). The elastic fixing rod (61) and the elastic plug rod (63) are arranged in parallel. The two ends of the elastic swing rod (62) are respectively connected to the ends of the elastic fixing rod (61) and the elastic plug rod (63). The end of the elastic fixing rod (61) away from the elastic swing rod (62) is connected to the hexagonal block (4). The end of the elastic plug rod (63) away from the elastic swing rod (62) can extend into the corresponding limiting hole (8).

2. The torsion-type anti-loosening bolt and nut assembly according to claim 1, characterized in that, The end of the nut body (2) away from the annular boss (7) is concentrically connected to an annular washer (9), and the end of the annular washer (9) away from the nut body (2) is connected in an annular array to several limiting teeth (11) with triangular cross sections.

3. The torsion-type anti-loosening bolt and nut assembly according to claim 1, characterized in that, The elastic fixing rod (61), elastic swing rod (62), and elastic plug rod (63) are designed as an integrated structure and are made of spring round steel.

4. The torsion-type anti-loosening bolt and nut assembly according to claim 1, characterized in that, The length of the hexagonal prism (3) is 10 pitches larger than the thickness of the hexagonal block (4) than the nut body (2).

5. The torsion-type anti-loosening bolt and nut assembly according to claim 1, characterized in that, The end of the elastic plug rod (63) away from the elastic swing rod (62) is chamfered.

6. The torsion-type anti-loosening bolt and nut assembly according to claim 1, characterized in that, The elastic plug rod (63) extends into the limiting hole (8) to a depth of 3-5 mm.

Images