WO2007006223A1

WO2007006223A1 - An anti-dissembling ferrule for bolt, a punch and a drilling plate

Info

Publication number: WO2007006223A1
Application number: PCT/CN2006/001618
Authority: WO
Inventors: Xinmin Wang
Original assignee: Xinmin Wang
Priority date: 2005-07-10
Filing date: 2006-07-10
Publication date: 2007-01-18
Also published as: CN1724885A

Abstract

An anti-departing ferrule for bolt is provided with an inner hole in the middle thereof. A lower surface closely contacted with a work-piece is located in the lower of said ferrule. The shape of the ferrule is approximately partially spherical or is a combined shape of circular truncated cone and partially spherical. Moreover, the surface of the ferrule is smooth and has no taper inner hole, and the shape of an inner hole is corresponding with that of a bolt head or nut. Furthermore, press-fitting engagement is formed between said inner hole and said bolt head or nut. A spacer-installing space is provided, viewing from the direction of said lower surface of the ferrule. On the other hand, an anti-loosening post inserted in a hole of a work-piece has reliable anti-loosening function for a bolt.

Description

Multi-functional bolt anti-disassembly ferrule and installation tool

The invention relates to a bolt attachment, in particular to a multi-functional bolt anti-disassembly ferrule.

Background technique

The existing bolt anti-disassembly anti-theft technology, such as the technical proposal disclosed in Chinese Patent No. 200420006543.6, entitled "Fin Helix Female Anti-theft Fixing Set", has the following problems - a circular tapered mounting sleeve Other functions, this is one; the inner hole of the fixing sleeve lacks the key structural elements that can form a tight fit with the bolt head or the nut. The hammering during installation only does not guarantee that the fixing sleeve forms a tight fit with the bolt head or the nut. It is removed and the anti-theft effect is lost. This is the second; the tapered inner hole in the fixing sleeve and the bolt head or nut without the altar can not form a tight fit structure, and naturally it is easy to be removed and lose the anti-theft function. Thirdly; the normally rationally arranged bolts are to be fitted with washers when they are used, and the installed fixing sleeves do not have a position for accommodating the washers, so that the lower surface of the fixed sleeves after installation cannot be closely attached to the workpiece, and the detachable tools are easily removed and the burglar is lost. Function, this is the fourth; the ribs and grooves of the inner hole of the fixing sleeve have basically no effect on the tamper-proof anti-theft, but the manufacturing process becomes Miscellaneous, inevitably increase the manufacturing cost, which is the Fifth. In another technical solution disclosed in Chinese Patent No. 03277170.3, entitled "An anti-theft waterproof nut", the anti-theft waterproof nut is fastened by a blind wire hole under a circular outer surface using an installation tool. On the contrary, it can be removed, and there is a problem that the anti-theft performance is not strong and there is no more function.

Common tools are used for stamping heads and drill templates.

Summary of the invention

The object of the present invention is to provide a multi-functional bolt anti-disassembly ferrule which is anti-disassembly, strong anti-theft performance, relatively simple manufacturing process, can prevent loose bolts, has a beautifying appearance and improves the safety protection against human body collision.

The invention also provides a special tool for installing a multifunctional anti-detachment ferrule.

In order to achieve the above object, the technical solution of the multifunctional bolt anti-disassembly ferrule of the present invention is: the middle portion of the ferrule has an inner hole, and the lower portion of the ferrule has a lower plane which can be closely attached to the workpiece, and the ferrule has an approximately spherical shape. Or an outer shape of a combination of a partial spherical shape and a truncated cone shape, the outer surface is rounded, the inner hole has no taper, and the shape of the inner hole matches the shape of the matched bolt head or nut, the inner The hole forms a radial interference fit with the mating bolt head or nut, and there is also a space for accommodating the bolt washer as seen from the lower plane of the ferrule.

Preferably, the radial interference fit formed by the inner bore with the mating bolt head or nut is a full radial interference fit.

The inner hole may be a polygonal inner hole or a circular hole, and the interference fit is evenly distributed in the middle of the top and/or the side of the polygonal hole angle, or equally divided in the circumference of the circular hole inner hole. There is a gap between the other parts of the inner hole and the mating bolt head or nut.

In order to reduce the weight and material saving of the solid tamper-proof ferrule, the ferrule can be made into an inner hollow type. The inner hole can also make a flange in the downward plane direction to increase the mating strength. Regardless of the lower part of the hollow or solid ferrule, there is room for the bolt washers to avoid mutual interference and to ensure that the lower surface of the ferrule fits snugly against the workpiece after assembly.

The lower plane may also be axially extended into an equal-diameter hollow cylindrical skirt that is assembled into a recess that is prefabricated on the workpiece and that matches the skirt, the skirt being The recessed table forms an interference fit to further enhance the anti-disassembly performance.

In order to prevent the detachment ferrule from functioning to prevent the bolt from loosening, one or more axially protruding bolt anti-loosening studs are added to the lower plane of the ferrule or the lower plane of the skirt, and the lower end of the spigot It has a chamfer or taper to facilitate the insertion into the anti-loosening post holes in the workpiece.

The inner hole can be a blind hole. After installation, the bolt is covered in the ferrule, and the outer surface is smooth and beautiful. In addition to the anti-disassembly function, the utility model has the function of beautifying the appearance and has a certain anti-corrosion function for the bolt. At the same time, it also has certain safety protection functions for human body collision. On this basis, further improvement can also be made in the middle of the bottom of the blind hole, adding a rounded table-shaped bolt to prevent the top of the tip, the top of the tip can also be changed to a circular arc shape, and two or more central intersecting grooves are opened with the threaded end. Bolt fit, after the nut is tightened, the ferrule is punched, and the end of the screw with the intersecting groove is opened by the taper of the rounded table top, and the screw is pushed over the nut, thereby having the function of preventing the bolt from loosening.

In order to install the multi-functional bolt detachment ferrule of the present invention, the present invention also provides a special ram having a rear end which is resistant to impact deformation or a shape matching the press fixture, and the front end of the ram has an inner end The inner arc or the inner arc plus the inner taper is matched with the outer arc or the outer arc of the outer shape plus the outer taper, and the middle of the punching head also prevents interference with the bolt. Cavity.

The punching head is made of high-quality steel and has a long rod shape. After the bolt is fastened to the workpiece, it will be tamper-proof. The lower plane of the unloading ferrule faces the workpiece, the inner hole is aligned with the bolt head or the nut, the ferrule is sleeved by the punching head, and the punching force is applied to the punching head, so that the interference fit ferrule is tightly sleeved on the bolt head or On the nut, the lower plane abuts the workpiece to complete the ferrule assembly.

In order to install the ferrule with the bolt anti-loosening stud on the lower plane of the present invention, the present invention also provides a drill template having a central locating hole, the shape of the central locating hole and the mating bolt head or The nut shapes are matched, loosely fitted, and positioned, the drill template is provided with a drill hole, and the position of the drill hole corresponds to the position of the stud.

After the bolt is fastened to the workpiece, the drill template is placed on the bolt head or the nut to be positioned, because the position of the drill hole on the drill template matches the position of the anti-loose column on the ferrule, and the drill hole is After the limit is drilled, the hole can be inserted into the hole of the anti-loose column, and then the ferrule is punched on the bolt by the aforementioned punching head, and the anti-loose column on the ferrule must be accurately embedded. In the borehole on the workpiece. The workpiece, the ferrule and the bolt are mutually restrained, so that the tamper-proof ferrule has an extremely reliable anti-bolt loosening function, and the ferrule assembly is completed.

As described above, the multi-functional bolt detachment ferrule has an approximately partial spherical shape, or an approximate partial spherical shape and a truncated cone shape. The disassembly tool wrench cannot be caught, the pliers cannot be clamped, and the lower plane is tightly attached. The workpiece can not be picked up, made of high-strength material heat treatment process, can also be anti-drilling, anti-saw, plus the interference fit between the ferrule and the bolt, compared with the fixed sleeve without interference fit, significantly improved the defense Disassembly function, this is one of them. The skirt type ferrule, especially the skirt type ferrule made by the high-strength material heat treatment process, in addition to the interference fit with the bolt, the interference fit is also formed between the ferrule and the workpiece, so that the ferrule has a double Anti-disassembly function, this is the second. The anti-loosening column and the anti-loose top structure of the ferrule, compared with the fixing sleeve without the anti-loosening function, increase the quite reliable anti-bolt loosening function without increasing the material, and solve the bolt fastening field. I hope that there are good measures to solve and not solve the problem. This is the third. When the ferrule is mounted on the bolt, the appearance of the bolt becomes smooth, and the function of beautifying the appearance is enhanced compared with the general appearance of the fixed sleeve. Bolts with ferrules, the appearance is smooth, especially the shape of the approximately spherical shape. Compared with the ribbed fixed sleeve, it not only saves the material, but also significantly improves the safety protection function when the human body collides. This is the fifth. Compared with the fixed sleeve of the through hole, the blind hole type ferrule encloses the bolt therein, which has a certain anti-corrosion function to the bolt, which is the sixth. The above is the six functions of the tamper-proof ferrule.

The aforementioned multi-functional bolt detachment ferrule can be easily and simply changed the shape of the inner hole. An equilateral or unequal polygonal bolt head or nut. Of course, it is also convenient to be matched with the cylindrical head bolts, and has a wide range of matching performances compared with a single fixed-type fixing sleeve, which is one of them. Compared with the fixed outer sleeve and the structural performance of the fixed sleeve, the outer surface of the ferrule has an approximate partial spherical shape and a combination of a partial spherical shape and a truncated cone shape. The structural form is hollow type, solid type, skirt type, and anti-loose column type. There are also blind hole type, blind hole top type, etc., as well as changes in the materials produced. It has formed a series of products with various specifications and structural properties, and has a wide range of applications, which is the second. The manufacturing process of the ferrule is relatively simple and relatively low in cost, such as hollow type stamped with sheet metal; if it is required to be biased and beautiful, and has a certain anti-disassembly function, it can be formed by one-time injection molding of colored engineering plastics. The structural characteristics of the ferrule determine the relatively simple and convenient installation, and only a lower level of skill can be operated. This is the fourth. The above are the four properties of the tamper-proof ferrule.

The special punching head for installing the multi-function bolt anti-disassembly ferrule and the structural principle of the special drill template determine the manufacturing process of the special punching head and the special drilling template, and the method of use are relatively simple and convenient, and also determine that the special tool is not easy to malfunction. , with high durability and reliability.

DRAWINGS

The multi-bolt anti-disassembly ferrule will be further described in detail below with reference to the accompanying drawings:

Figure 1 is a front view of a solid ferrule;

Figure 2 is a plan sectional view of Figure 1;

Figure 3 is a front view of the hollow ferrule;

Figure 4 is a plan sectional view of Figure 3;

Figure 5 is a front view of the hollow cuff type ferrule;

Figure 6 is a plan sectional view of Figure 5;

Figure Ί is a front view of a solid skirt ferrule;

Figure 8 is a plan sectional view of Figure 7;

Figure 9 is a front elevational view of the hollow skirt type ferrule;

Figure 10 is a plan sectional view of Figure 9;

Figure 11 is a front view of the solid anti-loose column type ferrule;

Figure 12 is a plan sectional view of Figure 11;

Figure 13 is a front view of the hollow lock-out stud type ferrule;

Figure 14 is a plan sectional view of Figure 13; Figure 15 is a front elevational view of the solid skirt anti-loose column type ferrule;

Figure 16 is a plan sectional view of Figure 15;

Figure 17 is a front elevational view of the hollow skirt anti-loose column type ferrule;

Figure 18 is a cross-sectional view of the top view of Figure 17;

Figure 19 is a front elevational view of a solid blind hole type ferrule;

Figure 20 is a plan sectional view of Figure 19;

Figure 21 is a front view of the solid blind hole anti-slipping tip type ferrule;

Figure 22 is a plan sectional view of Figure 21;

Figure 23 is an enlarged partial enlarged view of the middle portion of the polygonal inner hole side of the detachment prevention ferrule;

Fig. 24 is a partially enlarged plan view showing the end interference of the polygonal inner hole angle of the detachment prevention ferrule.

detailed description

The hollow type shown in Figs. 1 and 2, the hollow type shown in Figs. 3 and 4, and the hollow flange type multi-functional bolt detachable ferrule shown in Figs. 5 and 6 are the most basic types. The shape is preferably approximately spherical, or the upper part of the spherical part with a taper shape. The surface is smooth and has no other convex or concave deformation. It can be prevented from being caught by the wrench or clamped by the pliers. The lower plane is suitable for installation. Close to the workpiece to prevent it from being caught by the tampering tool and cannot be removed. The inner hole of the ferrule is matched with the shape of the bolt head or the nut, and the chamfering of the bolt head or the nut is convenient for installation, and the inner end of the inner hole is also chamfered at the end of the bolt, which is more convenient for installation. In addition to the radial interference fit of the bolts, the inner bores can also be interference-fitted at all sides of the polygonal inner bore or at the middle of the spaced edges, and can also be interference-fitted at all corners or corners of the polygonal bore. As shown in the partially enlarged schematic view of Fig. 23 and Fig. 24, the other portions are left with appropriate gaps. The flange of the hollow flanging ferrule increases the mating strength of the inner bore compared to the hollow type. The number of washers used to assemble the bolts will vary. Sometimes a double nut is required. For the ferrule, the nut close to the workpiece can be treated as a washer, and the axial height of the hollow position in the lower part of the ferrule can be adjusted. The upper edge of the installed ferrule bore is slightly below or flush with the bolt head or nut. The ferrule can be made of non-ferrous metal or colored engineering plastic materials when there is a certain anti-disassembly requirement but is biased towards appearance or other functions. When anti-drilling and anti-saw cutting are required, the ferrule can be made of high-strength metal material and heat treatment process.

The solid skirt type shown in Figs. 7 and 8, and the hollow skirt type detachable ferrule shown in Figs. 9 and 10 are based on the aforementioned ferrule, and the lower plane axially extends into an equal diameter hollow cylinder. Skirt, skirt The lower end can be chamfered or tapered, and is assembled into the prefabricated recessed table on the workpiece during assembly. It can also form an interference fit with the inner diameter of the concave table on the workpiece to further enhance the anti-disassembly performance.

The solid anti-loose column type shown in Figs. 11 and 12, the hollow anti-loosening column type shown in Figs. 13 and 14, and the solid skirt anti-loosening column type shown in Figs. 15 and 16, Fig. 17 and The hollow skirt anti-loose column type tamper-proof ferrule shown in Fig. 18 is based on the ferrule, and is formed on the lower plane of the ferrule or the lower plane of the skirt to form an axially protruding anti-loosening stud. The front end of the stud needs to be chamfered or tapered to facilitate assembly. The number of studs is at least one. Generally, there are two symmetrical ones, or multiple. After the bolt is tightened, after inserting a special drill template to drill the hole with the anti-loosening post on the workpiece, the ferrule can be installed with a special punch. At this time, the anti-loose column on the ferrule must be accurately embedded in the hole in the workpiece. The workpiece, the ferrule and the bolt are mutually restrained, and the ferrule of the anti-loosening column can be installed at both ends of the bolt. In addition to the anti-disassembly function, it also has an extremely reliable anti-loose function. As an additional function of the tamper-proof ferrule, it provides an extremely reliable measure to better solve the problem of bolt loosening in the field of bolt fastening, with little increase in manufacturing cost, especially for high anti-loose requirements. There are advantages when there are anti-disassembly requirements.

Based on the solid ferrule shown in Fig. 1 and Fig. 2, it is improved into a solid blind hole type detachable ferrule as shown in Fig. 19 and Fig. 20, and the bolt is placed under the ferrule after installation, and the appearance is smooth and beautiful. In addition to the anti-disassembly function, the safety protection of the human body collision is improved, and the corrosion resistance of the bolt is also improved. When it is more aesthetically pleasing or improves the safety of human body collisions, it is made of plastic material, which can significantly reduce the cost and weight.

Based on the solid blind hole type ferrule shown in Figs. 19 and 20, the solid blind hole anti-looking tip type ferrule shown in Figs. 21 and 22 is modified. In the middle of the bottom of the blind hole, a round table type top is made, and the threaded end is provided with two or more center cross groove bolts. After the nut is fastened, the ring is punched, and the tip taper is used to open the ring. The screw end of the groove is opened and squeezed on the nut. In addition to the anti-disassembly function, it also has a good anti-bolt loosening, anti-corrosion and beautifying appearance. The ferrule is especially suitable for drilling and anti-loose on the workpiece. The location of the stud hole, but carefully design the fit between the ferrule and the threaded end cross groove, nut, and workpiece.

In addition to countersunk heads and semi-circular head screws, other non-standard special bolt heads or nuts can be designed with reference to the previous embodiment to change the shape of the inner hole to make a special type of detachable ferrule, such as triangle, pentagon, and heptagonal. Bolt heads or nuts such as unequal. In order to install the multi-functional bolt detachment ferrule of the present invention, a special ram is used which has a rear end which is resistant to impact or conforms to the shape of the press fixture, and the front end of the ram has an inner arc Or the inner circular arc plus the inner taper, the inner circular arc or the inner circular arc plus the inner taper is matched with the outer circular arc or the outer circular arc plus the outer taper of the outer shape, and a cavity for preventing interference with the bolt in the middle of the punching head .

The punching head is made of high-quality steel and has a long rod shape. After the bolt is fastened to the workpiece, the lower plane of the tamper-proof ferrule is directed toward the workpiece, and the inner hole is aligned with the bolt head or the nut, and the punching head is used to cover the sleeve. Circle, then apply punching force to the punching head, so that the interference fit ferrule is tightly clamped on the bolt head or nut, and the lower plane is closely attached to the workpiece to complete the ferrule assembly.

In order to install the ferrule with the bolt anti-loosening stud on the lower plane of the present invention, a drill template may be used, the drill template having a central locating hole, the shape of the central locating hole and the mating bolt head or nut The shapes are matched, loosely fitted, and positioned, the drill template is provided with a drill hole, and the position of the drill hole corresponds to the position of the protrusion.

Claims

Claim

A multi-functional bolt anti-disassembly ferrule, the ferrule has an inner hole in a middle portion thereof, wherein the ferrule has a lower surface which can be closely attached to the workpiece, and the ferrule has an approximately spherical shape or an approximate portion a shape of a combination of a spherical shape and a truncated cone shape, the outer surface is rounded, the inner hole has no taper, and the shape of the inner hole matches the shape of the matched bolt head or nut, and the inner hole is formed with the matched bolt head or nut The radial interference fit also has space for the bolt washers as seen from the lower plane of the ferrule.

2. The multi-function bolt tamper-proof ferrule of claim 1 wherein the radially interference fit formed by the inner bore with the mating bolt head or nut is a uniform radial uniform interference fit.

3. The multi-function bolt tamper-proof ferrule according to claim 1, wherein the inner hole is a polygonal inner hole, and the interference fit is evenly distributed at the top of the polygonal hole angle and/or at the middle of the side There is a gap between the other parts of the inner hole and the mating bolt head or nut.

4. The multi-function bolt tamper-proof ferrule according to claim 1, wherein the inner hole is a circular hole-shaped inner hole, and the interference fit is evenly distributed on the circumference of the circular hole-shaped inner hole. There is a gap between the other parts of the inner hole and the mating bolt head or nut.

The multi-function bolt tamper-proof ferrule according to claim 3, wherein the polygonal inner hole is at least any one of a triangle, a pentagon, a hexagon, a heptagon, and an unequal.

The multi-function bolt tamper-proof ferrule according to any one of claims 1 to 5, characterized in that the lower surface has an axially protruding bolt anti-loosening stud, and the lower end of the stud has a chamfer or a taper.

The multi-functional bolt detachment ferrule according to any one of claims 1 to 5, characterized in that the lower plane extends axially into an equal-diameter hollow column-shaped skirt, which is embedded in the workpiece during assembly, and The skirt may form an interference fit with the recess in the matching recess of the skirt.

8. The multi-functional bolt tamper-proof ferrule according to claim 7, wherein the lower plane of the skirt has an axially protruding bolt-proof stud, and the lower end of the stud has a chamfer or a taper.

The multi-function bolt tamper-proof ferrule according to any one of claims 1 to 8, wherein the inner hole is a blind hole.

10. The multi-function bolt tamper-proof ferrule according to claim 9, wherein the bottom of the blind hole has a rounded-shaped locking top in the middle, and the top of the top has a circular arc shape.

11. The multi-function bolt tamper-proof ferrule according to any one of claims 1 to 10, characterized in that The inside of the ferrule is hollow, and the inner hole can also have a flange in a downward plane direction.

12. A special stamping head for mounting the multi-function bolt tamper-proof ferrule according to any one of claims 1 to 11, having a rear end that is resistant to impact or shaped to fit the press fixture, The feature is that the front end of the punching head has an inner circular arc or an inner circular arc plus an inner taper, and the inner circular arc or the inner circular arc plus the inner taper matches the outer circular arc or the outer circular arc plus the outer taper of the outer shape, and the middle of the punching head There is also a cavity that prevents interference with the bolts.

13. A special drill template for mounting the multi-function bolt tamper-proof ferrule according to claim 6 or 8, wherein the drill template has a central locating hole, the shape of the central locating hole and the mating bolt head or The nut shapes are matched, loosely fitted, and positioned, the drill template is provided with a drill hole, and the position of the drill hole corresponds to the position of the stud.