CN218031015U - Bolt convenient to disassemble and assemble - Google Patents

Abstract

The utility model belongs to the technical field of threaded connectors, and in particular relates to a bolt that is easy to disassemble and assemble, and a method for using the same. It is arranged on the threaded part of the stud, and the nut is threadedly connected to the outermost end of the threaded part. The non-threaded part of the stud is provided with a wedge hole for installing the wedge. The longitudinal section of the wedge hole is a right-angled trapezoid with a wide top and a narrow bottom. The cross section of the wedge hole is semicircular arc-shaped on the side away from the threaded part. The wedge fits the shape of the wedge hole. The inclination of the bolt wedge of the utility model is about 5°, which can realize self-locking. The inclined surface adopts a semi-circular arc shape, which eliminates stress concentration. The fastening method of hitting the wedge with a hand hammer saves time and effort, is simple to manufacture, requires low machining accuracy, and is low in cost. It is especially suitable for fixing inspection holes or inspection doors that require less loosening and more frequent disassembly and assembly. Improved work efficiency.

Description

A bolt that is easy to disassemble

technical field

The utility model belongs to the technical field of threaded connectors, in particular to a bolt that is easy to assemble and disassemble.

Background technique

In order to accurately grasp the condition of the equipment, observation holes or access doors are usually set on the equipment to check the operation of the internal equipment. At present, many observation holes or access doors use the traditional bolt and nut fastening method, and a wrench is required when opening or closing Rotate the nut to disassemble the bolt, and the work efficiency is low. Since the fastening and anti-loosening requirements of the observation hole or the inspection door are not very high, in order to reduce the labor intensity of the workers and improve the work productivity, a bolt has been developed to simplify the complicated procedures.

Contents of the invention

The purpose of the utility model is to provide a bolt that can be fastened by hitting the wedge with a hand hammer, which saves time and effort and has high working efficiency.

The technical solution adopted by the utility model to solve the technical problem is: a bolt that is easy to disassemble, including studs, wedges, nuts, spring washers, and flat washers used in conjunction with the studs; The threaded part and the non-threaded part at the rear end, the flat washer and the spring washer are sequentially sleeved on the threaded part of the stud, and the nut is threadedly connected to the outermost end of the threaded part. The unthreaded part of the stud is provided with a wedge hole for installing the wedge. The longitudinal section of the wedge hole is a right-angled trapezoid with a wide top and a narrow bottom. The top of the wedge hole is the long side of the hole, and the bottom of the wedge hole is the short hole. The side of the wedge hole close to the threaded part of the stud is the right angle side of the hole, the side of the wedge hole away from the threaded part is the hypotenuse of the hole, and the cross section of the wedge hole away from the threaded part is a semicircular arc shape. The wedge fits the shape of the wedge hole. One side of the wedge is the wedge hypotenuse. The slope of the wedge hypotenuse is the same as that of the hole hypotenuse. The top of the wedge is the long side of the wedge. The bottom of the wedge is the short side of the wedge, the length of the long side of the wedge is greater than the length of the long side of the hole, and the length of the short side of the wedge is less than the length of the short side of the hole.

Further, the slope of the hypotenuse of the hole is less than 1:12.

Further, the width of the wedge hole is 1/4 of the diameter of the stud.

Further, the distance between the right-angled side of the wedge hole and the screw thread of the threaded part of the stud is less than 5 mm.

Further, the threaded part and the unthreaded part of the stud are integrally formed, and the outer diameters of the threaded part and the unthreaded part of the stud are the same.

The utility model has the following beneficial effects: the slope of the bolt wedge of the utility model is about 5°, which can realize self-locking. The inclined surface adopts a semi-circular arc shape, which eliminates stress concentration. The fastening method of striking the wedge with a hand hammer replaces the fastening method of rotating the bolt with a wrench, which saves time and effort, is simple to manufacture, requires low machining accuracy, and is low in cost. The device is especially suitable for fixing inspection holes or inspection doors with low anti-loosening requirements and frequent disassembly and assembly, which greatly shortens the working time and improves the working efficiency.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the bolt of the present invention.

Fig. 2 is a three-dimensional schematic diagram of the assembled bolt of the utility model.

Fig. 3 is a sectional view of a stud of the present invention.

Fig. 4 is the front view of the utility model wedge.

In the figure, 1. Stud, 2. Wedge, 3. Nut, 4. Spring washer, 5. Flat washer, 6. Wedge hole, 7. Right angle side of hole, 8. Long side of wedge, 9. Wedge Short side, 10, the long side of the hole, 11, the short side of the hole, 12, the hypotenuse of the hole, 13, the hypotenuse of the wedge.

detailed description

The following are specific embodiments of the utility model, further describing the technical solution of the utility model, but the protection scope of the utility model is not limited to these embodiments. All changes or equivalent substitutions that do not deviate from the concept of the utility model are included in the protection scope of the utility model.

As shown in Figures 1 and 2, a bolt that is easy to disassemble includes a stud 1, a wedge 2 used in conjunction with the stud 1, a nut 3, a spring washer 4, and a flat washer 5; the stud 1 includes a front end The threaded part b and the unthreaded part a at the rear end, the threaded part and the unthreaded part of the stud 1 are integrally formed, and the outer diameters of the threaded part and the unthreaded part of the stud 1 are the same. The flat washer 5 and spring washer 4 are sequentially sleeved on the threaded portion of the stud 1 , and the nut 3 is threaded to the outermost end of the threaded portion.

The unthreaded part of the stud 1 is provided with a wedge hole 6 for installing the wedge 2 , and the width of the wedge hole 6 is 1/4 of the diameter d of the stud 1 . As shown in Figure 3, the longitudinal section of the wedge hole 6 is a right-angled trapezoid with a wide top and a narrow bottom. The top of the wedge hole 6 is the long side 10 of the hole, and the bottom of the wedge hole 6 is the short side 11 of the hole. The side near the threaded part of the stud 1 is the right-angled side 7 of the hole, and the distance h between the right-angled side 7 of the wedge hole 6 and the threaded part of the threaded part of the stud 1 is less than 5mm. The side of the wedge hole away from the threaded part is the hypotenuse 12 of the hole, and the cross section of the wedge hole 6 away from the side of the threaded part is in the shape of a semicircle.

The wedge 2 is adapted to the shape of the wedge hole 6, and the slope A of the wedge 2 adopts a semicircular arc shape, which eliminates stress concentration. As shown in Figure 4, one side of the wedge 2 is the wedge hypotenuse 13, the slope of the wedge hypotenuse 13 is the same as the slope of the hole hypotenuse 12, and the slope of the hole hypotenuse 12 is less than 1:12, both It is about 5°, which can realize self-locking. The top of the wedge 2 is the long side 8 of the wedge, and the bottom of the wedge 2 is the short side 9 of the wedge. The length g of the long side 8 of the wedge is greater than the length s of the long side 10 of the hole, and the length of the short side 9 of the wedge is shorter than the hole The length of the short side 11.

The method for using the bolts for easy assembly and disassembly includes the following steps:

1) Pass the stud 1 through the bolt hole of the inspection hole that needs to be tightened, the threaded part of the stud 1 is on the side of the equipment, and the long side 10 of the wedge hole 6 is on the top;

2) Install flat washer 5, spring washer 4 and nut 3 in sequence on the threaded part of stud 1, and rotate nut 3 to adjust right-angled side 7 of wedge hole 6 to be located in the screw hole of the device to be fastened;

3) Insert the short side 9 of the wedge 2 from the long side 10 of the wedge hole, and tap the long side 8 of the wedge 2 with a hand hammer until the inspection hole to be tightened is confirmed to be sealed and the installation is completed ,as shown in picture 2;

4) When disassembling, tap the short side 9 of the wedge 2 with a hand hammer in the opposite direction, so that the wedge 2 is separated from the wedge hole 6, and then remove the stud 1, nut 3, spring washer 4 and flat washer 5.

The bolts of the utility model are especially suitable for the fixing of inspection holes or inspection doors with low anti-loosening requirements and frequent disassembly and assembly. The disassembly and assembly process of the bolts can be completed only by tapping with a hand hammer, which greatly shortens the working time of this process. .

The utility model is not limited to the above-mentioned embodiment, and anyone should know that the structural changes made under the enlightenment of the utility model, all technical solutions that are the same as or similar to the utility model, all fall within the scope of protection of the utility model Inside.

The technologies, shapes and construction parts not described in detail in the utility model are all known technologies.

Claims (5)

1. A bolt convenient to disassemble and assemble is characterized by comprising a stud, and a wedge block, a nut, an elastic pad and a flat pad which are matched with the stud;

the stud comprises a threaded part at the front end and a non-threaded part at the rear end, the flat pad and the elastic pad are sequentially sleeved on the threaded part of the stud, and the nut is in threaded connection with the outermost end of the threaded part;

the non-threaded part of the stud is provided with a wedge block hole for installing a wedge block, the longitudinal section of the wedge block hole is a right trapezoid with a wide top and a narrow bottom, the top of the wedge block hole is a hole long side, the bottom of the wedge block hole is Kong Duanbian, one side, close to the threaded part of the stud, of the wedge block hole is a hole right-angle side, one side, far away from the threaded part, of the wedge block hole is a hole oblique side, and one side, far away from the threaded part, of the cross section of the wedge block hole is in a semi-circular arc shape;

the shape of voussoir and wedge hole suits, and one side of voussoir is the voussoir hypotenuse, and the inclination of voussoir hypotenuse is the same with the inclination of hole hypotenuse, and the top of voussoir is the voussoir long limit, and the bottom of voussoir is the voussoir minor face, and the length on voussoir long limit is greater than the length on hole long limit, and the length on voussoir minor face is less than the length on hole minor face.

2. The easy-to-disassemble bolt of claim 1 wherein the inclination of Kong Xiebian is less than 1.

3. The easy-to-dismount bolt according to claim 1, wherein the width of the wedge hole is one quarter of the diameter of the stud.

4. The easy-to-dismount bolt according to claim 1, wherein the distance between Kong Zhijiao side of the wedge hole and the thread of the threaded portion of the stud is less than 5mm.

5. The bolt of claim 1, wherein the threaded portion and the unthreaded portion of the stud are integrally formed, and the threaded portion and the unthreaded portion of the stud have the same outer diameter.

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