Tension adjusting bolt

Abstract

The utility model belongs to the technical field of hardware fittings, and discloses a tension adjusting bolt which comprises a bolt head, a bolt bar and a nut, the bottom end face of the bolt head is fixedly connected with the bolt bar, the bolt bar is in threaded connection with the nut, and an anti-loosening assembly is connected between the bolt bar and the nut. The anti-loosening assembly comprises a square deep groove formed in the bottom of the bolt rod, two symmetrically-arranged kneading rods are arranged in the square deep groove, a spring telescopic rod is connected between the kneading rods, extending blocks are fixedly connected to the sides, away from each other, of the ends of the kneading rods, and strip-shaped through grooves are formed in the positions, corresponding to the extending blocks, of the bolt rod. The extending blocks penetrate through the strip-shaped through grooves, annular grooves are formed in the inner wall of the nut, sawtooth grooves are formed in the inner walls of the annular grooves, and the sawtooth blocks on the extending blocks extend into the sawtooth grooves in the inner wall of the nut to prevent the nut from rotating, so that the bolt is prevented from loosening, and use of the bolt is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of hardware accessories, in particular to a tension adjusting bolt. Background Art

[0002] Bolts are a common mechanical fastener, usually consisting of a head and a screw (a cylinder with external threads). The main function of a bolt is to tightly connect two or more parts together. It has the following characteristics: strong fastening, able to provide reliable connection, and withstand large tension, pressure and shear force; easy installation, and can be installed and disassembled with simple tools (such as wrenches, etc.); wide applicability, widely used in various mechanical equipment, building structures, vehicles and other fields.

[0003] The Chinese patent with application number 202121927770.2 discloses a tension adjustment bolt, including a bolt head, a bolt rod is fixed at the bottom end of the bolt head, a fixing slot is provided on the outside of the bolt rod, the fixing slot is a rectangular slot, a bolt thread section is fixed at the bottom end of the bolt rod, an adjusting nut is threadedly connected to the outside of the bolt thread section, a nut gasket is connected to the top of the adjusting nut, the nut gasket is a cloth-reinforced rubber gasket, a fixed cylinder is movably installed on the top of the nut gasket, a fixed disk is fixed on the top of the fixed cylinder, and a plurality of fixed circular holes are provided in a circular array around the center line of the fixed disk near the outside of the fixed disk. The adjusting nut and the bolt of the bolt can be fixed relative to the fixed cylinder through the nut gasket to prevent external force from loosening the thread pair, and at the same time, it can prevent the hand from being injured when the card lever is toggled. At the same time, after the hand is released, the card spring automatically pushes the card lever back to the working position to clamp the bolt rod, so that the tension can be adjusted arbitrarily and the accuracy of tension adjustment can be improved.

[0004] However, the tension adjustment bolt has the following problem during use: the clamping spring needs to provide sufficient force to enable the axial clamp to provide a sufficiently large friction force, which is very inconvenient to use.

[0005] Therefore, a tension adjusting bolt is proposed to solve the above problems. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a tension adjustment bolt, which has the advantages of preventing the nut from loosening and facilitating the use of the bolt.

[0007] To achieve the above object, the utility model provides the following technical solutions: a tension adjustment bolt, comprising a bolt head, a bolt rod, and a nut, wherein the bottom end surface of the bolt head is fixedly connected to the bolt rod, the bolt rod is threadedly connected to the nut, and an anti-loosening component is connected between the bolt rod and the nut;

[0008] The anti-loosening component includes a square deep groove arranged at the bottom of the bolt rod, two symmetrically arranged kneading rods are arranged in the square deep groove, a spring telescopic rod is connected between the kneading rods, a protruding block is fixedly connected to the side away from the end of the kneading rod, a strip through groove is arranged at a position corresponding to the protruding block on the bolt rod, the protruding block passes through the strip through groove, an annular groove is arranged on the inner wall of the nut, a serrated groove is arranged on the inner wall of the annular groove, a serrated block corresponding to the serrated groove is arranged on the end face of the protruding block, and the serrated block extends into the serrated groove.

[0009] Preferably, a hexagonal countersunk groove is provided on the top of the bolt head.

[0010] Preferably, a gasket is fixedly connected to the bottom of the bolt head, the gasket is fixedly connected to the bolt rod, and the bottom of the gasket is provided with anti-slip grooves.

[0011] Preferably, the bolt rod is composed of a bare rod section, a threaded section, and a guide end which are arranged in sequence from top to bottom.

[0012] Preferably, the bottom end of the kneading rod extends out of the square deep groove.

[0013] Preferably, the spring telescopic rod comprises an outer rod, an inner rod, and a return spring, the return spring is arranged in the inner cavity of the outer rod, and the end of the inner rod is arranged in the outer rod.

[0014] Preferably, the inner diameter of the open end of the outer rod is smaller than the diameter of the end of the inner rod extending into the outer rod.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model prevents the nut from rotating by setting an anti-loosening component, and the serrated block on the extending block extends into the serrated groove on the inner wall of the nut, thereby preventing the bolt from loosening and facilitating the use of the bolt;

[0017] 2. The utility model provides a variety of bolt rotation methods by setting a hexagonal countersunk groove, avoiding a single rotation method that cannot cope with bolts in different corrosion conditions, thereby improving the convenience of bolt use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of the bolt head and the bolt rod of the utility model;

[0020] Figure 3 It is a cross-sectional structural schematic diagram of the insertion block position of the utility model;

[0021] Figure 4This is a schematic diagram of the structure of the insertion block and the kneading rod of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the nut of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the spring telescopic rod of the utility model.

[0024] In the figure: 1. Bolt head;

[0025] 2. Bolt rod; 21. Polished rod section; 22. Threaded section; 23. Guide end;

[0026] 3. Nut;

[0027] 4. Anti-loosening assembly; 41. Square deep groove; 42. Kneading rod; 43. Spring telescopic rod; 431. Outer rod; 432. Inner rod; 433. Return spring; 44. Extension block; 45. Strip through groove; 46. Annular groove; 47. Sawtooth groove; 48. Sawtooth block;

[0028] 5. Hexagonal sink; 6. Gasket. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figures 1 to 6 As shown, the utility model provides a tension adjustment bolt, comprising a bolt head 1, a bolt rod 2, and a nut 3. The bottom end surface of the bolt head 1 is fixedly connected to the bolt rod 2, the bolt rod 2 is threadedly connected to the nut 3, and an anti-loosening component 4 is connected between the bolt rod 2 and the nut 3. The serrated block 48 on the extending block 44 extends into the serrated groove 47 on the inner wall of the nut 3 to prevent the nut 3 from rotating, so as to prevent the bolt from loosening.

[0031] The anti-loosening assembly 4 includes a square deep groove 41 provided at the bottom of the bolt rod 2. The square deep groove 41 can prevent the kneading rod 42 from rotating. Two symmetrically arranged kneading rods 42 are provided in the square deep groove 41. The kneading rods 42 are close to each other so that the extension block 44 is received in the square deep groove 41. A spring telescopic rod 43 is connected between the kneading rods 42. The spring telescopic rod 43 provides a force to push the kneading rods 42 away from each other, that is, to push out the extension block 44, so that the serrated block 48 extends into the serrated groove 47. The side away from the end of the kneading rod 42 is fixedly connected with the extension block 44. A strip through groove 45 is provided at a position on the bolt rod 2 corresponding to the protruding block 44, so that the protruding block 44 can be extended from positions at different heights of the bolt rod 2. The protruding block 44 passes through the strip through groove 45, and an annular groove 46 is provided on the inner wall of the nut 3. A serrated groove 47 is provided on the inner wall of the annular groove 46. A serrated block 48 corresponding to the serrated groove 47 is provided on the end face of the protruding block 44. The serrated block 48 extends into the serrated groove 47. The serrated block 48 cooperates with the serrated groove 47 to prevent the protruding block 44 and the nut 3 from rotating relative to each other, that is, to prevent the bolt rod 2 and the nut 3 from rotating relative to each other.

[0032] Specifically, a hexagonal recess 5 is provided on the top of the bolt head 1, which provides another way to rotate the bolt, thereby preventing the bolt head 1 from being unable to rotate due to wear on the outer wall thereof, and is more conducive to the use of the bolt.

[0033] Furthermore, a gasket 6 is fixedly connected to the bottom of the bolt head 1, which can increase the contact area with the fastened object, which is beneficial to increase the friction. The gasket 6 is fixedly connected to the bolt rod 2, and the bottom of the gasket 6 is provided with anti-slip grooves, which further increases the friction and prevents the nut 3 from rotating together with the bolt head 1 and the bolt rod 2 during tightening.

[0034] Furthermore, the bolt rod 2 is composed of a bare rod section 21, a threaded section 22, and a guide end 23 which are arranged in sequence from top to bottom.

[0035] It is worth noting that the bottom ends of the kneading rods 42 extend out of the square deep grooves 41 to facilitate kneading the kneading rods 42 to move closer to each other.

[0036] It is worth noting that the spring telescopic rod 43 includes an outer rod 431 , an inner rod 432 , and a return spring 433 . The return spring 433 is disposed in the inner cavity of the outer rod 431 , and the end of the inner rod 432 is disposed in the outer rod 431 .

[0037] It is worth mentioning that the inner diameter of the open end of the outer rod 431 is smaller than the diameter of the end of the inner rod 432 extending into the outer rod 431 , so as to prevent the inner rod 432 from being separated from the outer rod 431 .

[0038] Working principle and process: The bolt rod 2 of the bolt is passed through the through holes of the two objects to be fastened, and the nut 3 is screwed in from the end of the bolt rod 2 away from the bolt head 1. As the nut 3 is rotated, the two objects can be gradually fastened until the nut 3 reaches a suitable position. At this time, the end position of the kneading rod 42 of the anti-loosening component 4 is pinched to make the two kneading rods 42 approach each other. At this time, the spring telescopic rod 43 is shortened, the inner rod 432 is further extended into the outer rod 431, and the reset spring 433 is in a compressed state. At the same time, the extending block 4 The part extending out of the strip-shaped through groove 45 is retracted, and the position of the extending block 44 is adjusted so that its height matches that of the nut 3. The extending block 44 is aligned with the annular groove 46 on the inner wall of the nut 3, and the pinching rod 42 is gradually loosened so that the extending block 44 passes through the strip-shaped through groove 45 and extends into the annular groove 46 of the nut 3, and the serrated block 48 on the end face of the extending block 44 extends into the serrated groove 47 on the inner wall of the annular groove 46, so that the position of the nut 3 can be fixed, and the nut 3 can be prevented from rotating on the bolt rod 2, so that the bolt can be prevented from being loosened, which is convenient for the use of the bolt.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tension adjustment bolt, comprising a bolt head (1), a bolt rod (2), and a nut (3), characterized in that: The bottom end surface of the bolt head (1) is fixedly connected to a bolt rod (2), the bolt rod (2) is threadedly connected to a nut (3), and an anti-loosening component (4) is connected between the bolt rod (2) and the nut (3); The anti-loosening assembly (4) comprises a square deep groove (41) arranged at the bottom of the bolt rod (2), two symmetrically arranged kneading rods (42) are arranged in the square deep groove (41), a spring telescopic rod (43) is connected between the kneading rods (42), a protruding block (44) is fixedly connected to the side of the end of the kneading rod (42) away from the protruding block (44), a strip-shaped through groove (45) is arranged at a position on the bolt rod (2) corresponding to the protruding block (44), the protruding block (44) passes through the strip-shaped through groove (45), an annular groove (46) is arranged on the inner wall of the nut (3), a sawtooth groove (47) is arranged on the inner wall of the annular groove (46), a sawtooth block (48) corresponding to the sawtooth groove (47) is arranged on the end surface of the protruding block (44), and the sawtooth block (48) extends into the sawtooth groove (47).

2. A tension adjustment bolt according to claim 1, characterized in that: A hexagonal recess (5) is provided on the top of the bolt head (1).

3. The tension adjusting bolt according to claim 1, characterized in that: A gasket (6) is fixedly connected to the bottom of the bolt head (1), the gasket (6) is fixedly connected to the bolt rod (2), and anti-slip grooves are provided on the bottom of the gasket (6).

4. The tension adjusting bolt according to claim 1, characterized in that: The bolt rod (2) is composed of a bare rod section (21), a threaded section (22), and a guide end (23) which are arranged in sequence from top to bottom.

5. The tension adjusting bolt according to claim 1, characterized in that: The bottom end of the kneading rod (42) extends out of the square deep groove (41).

6. The tension adjustment bolt according to claim 1, characterized in that: The spring telescopic rod (43) comprises an outer rod (431), an inner rod (432), and a return spring (433); the return spring (433) is arranged in an inner cavity of the outer rod (431); and the end of the inner rod (432) is arranged in the outer rod (431).

7. A tension adjustment bolt according to claim 6, characterized in that: The inner diameter of the open end of the outer rod (431) is smaller than the diameter of the end of the inner rod (432) extending into the outer rod (431).

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