WO2021197095A1

WO2021197095A1 - Anti-theft fixing and sealing device for motor vehicle license plate

Info

Publication number: WO2021197095A1
Application number: PCT/CN2021/081781
Authority: WO
Inventors: 李英宇
Original assignee: 李英宇
Priority date: 2020-04-02
Filing date: 2021-03-19
Publication date: 2021-10-07
Also published as: CN213138682U

Abstract

Disclosed is an anti-theft fixing and sealing device for a motor vehicle license plate. The anti-theft fixing and sealing device is composed of an anti-loosening gasket (2), a fixing and sealing base (3), a bolt component, and a fixing and sealing buckle cover (7), wherein the bolt component is composed of a bolt body (4), a steel wire check ring (5) and an anti-theft cap (6); the bolt body (4) is protected by the anti-theft cap (6); and a common tool cannot directly apply an acting force to the bolt body (4), such that the fixing and sealing device has anti-dismantling and anti-theft functions of a deep level and has a good safety maintenance performance.

Description

Anti-theft and solid sealing device for motor vehicle license plate

Technical field

The invention relates to a fixing device for a motor vehicle number plate.

Background technique

The motor vehicle number plate fixing device should have sufficient basic performances of anti-theft and safety maintenance. However, in real life, there are often the phenomenon of vehicle license plates being easily disassembled and stolen, and there are also situations of insecure maintenance, which seriously affects public safety and industry management. How to realize and balance these two functions is a problem that needs to be resolved. The problem.

According to the public safety industry standard of the People's Republic of China: Motor Vehicle Number Plate Fixing Device GA804-2008, the fixing device is mainly composed of bolts, nuts, solid sealing base and solid sealing buckle cover. The solid-sealing buckle cover is basically a sheet metal part, which is the first safety line of defense for the solid-sealing device. There is no obvious essential difference in this aspect among various selections. The structure of the bolt becomes the second line of defense. In the current practical application, the bolt roughly has the following types:

1. Ordinary cross-head bolts: This kind of bolt has almost no anti-theft function. Once the solid-sealed buckle cover made of sheet metal is destroyed, the bolt can be disassembled freely. The anti-theft ability of this kind of solid sealing device depends on the protective ability of the sheet metal. Generally speaking, the sheet metal structure is easy to be destroyed and the anti-theft ability is limited. It is a type that needs to be improved.

2. S-shaped slotted head screw: This kind of screw design idea is one-way anti-return, such as the anti-return screw disclosed in patent ZL96212250.5, the anti-theft ability is better than ordinary cross-head bolts, but this is also a relative concept. The essence is a special-shaped head screw, and its cap still has a force point and a force surface. Once the solid seal buckle cover is destroyed, the screw is exposed in front of the operator and can be removed with a special tool (method) or a special device. There is still a way to crack, and there are deficiencies; in the case of destructive disassembly, if there is no special tool, when you need to choose an electric drill, it may damage the nut threads on the vehicle, causing greater damage and trouble, and making the license plate unable to continue The consequences of installation or affecting performance.

3. Self-destructing bolts. After the process head is twisted off during the installation process, the bolt cannot be rotated in the reverse direction and has an anti-disassembly function, such as a license plate anti-theft fastening device disclosed in the patent ZL200520098250.X, which has an anti-theft ability better than an S-shaped slotted screw. However, there is a situation that cannot be tightened twice. This situation cannot guarantee the balanced force and synchronous tightening of all the sealing devices on the same license plate, and it cannot be compensated, which affects the tightening effect; it also exists in the case of destructive removal. It may cause damage to the nut thread on the vehicle and its consequences.

Technical solutions

The technical core of the present invention is the bolt component. The bolt adopts a split structure. As shown in Figures 3 and 4, the bolt component is composed of the bolt body 4, the wire retaining ring 5, and the anti-theft cap 6. Through a unique structural design, The three zeros are connected into one body after assembly, so that the bolt parts have the following functions:

The upper end surface of the anti-theft cap 6 has a crosshead 66 structure, and the inside of the bolt component has adapting inclined surfaces 61, 41 and stepped surfaces 62, 42 to play the role of sliding and transmitting torsion. A screwdriver can be used to rotate clockwise to transmit torque to tighten the bolt body 4, and when the screwdriver rotates counterclockwise, torsion cannot be transmitted.

The retaining structure of the wire retaining ring 5 is used inside the bolt component to limit the mutual movement range of the anti-theft cap 6 and the bolt body 4, thereby ensuring that the anti-theft cap 6 and the bolt body 4 cannot be separated. The anti-theft cap 6 covers the entire bolt body 4 , The bolt body 4 is completely protected from being exposed. Conventional tools such as screwdrivers, pliers, adjustable wrenches, sleeves and other conventional tools cannot reach the bolt body 4, and the bolt body 4 cannot be loosened, which plays a protective role. Unless destructive separation, the solid sealing device cannot be reused after being destroyed.

When the license plate needs to be removed for special reasons (such as maintenance and transfer of ownership), by destroying the anti-theft cap 6 and clamping the cylindrical surface 65 of the bolt body, the bolt body 4 can be unscrewed without damaging the nut threads on the vehicle.

The fixed sealing device also has a matching anti-loosening gasket 2 and a fixed sealing base 3. The anti-loosening washer 2 functions to prevent vibration from loosening, and the solid-sealing base 3 functions to fix the solid-sealing buckle cover 7 and protect the bolt components.

Beneficial effect

Based on providing higher anti-disassembly and anti-theft capabilities, and having a method of avoiding damage to the nut threads of the car body during maintenance, and solving the various shortcomings of bolts in reality, the present invention designs a brand-new bolt structure, which overturns the traditional bolts. The concept of one body, the new structure overcomes the various defects listed in the background technology, the structure is relatively simple, realizes multiple anti-dismantling protections, achieves strong anti-theft ability and safe and safe maintenance performance, making the two seem to be contradictory Functions are reasonably and effectively balanced and resolved.

Description of the drawings

Figure 1 Schematic diagram of the installation and use of the solid sealing device;

Figure 2 A perspective view of the assembly effect of bolt components;

Figure 3 Schematic diagram of assembly of bolt components (decomposition 1);

Figure 4 Schematic diagram of assembly of bolt components (decomposition 2);

Figure 5 Solid-sealed base;

Figure 6 Securely seal the buckle cover.

Embodiments of the present invention

Four concave support arms 71 are formed on the periphery of the solid-sealing buckle cover 7 (Figure 6), and the top of the solid-sealing base 3 has a flange 31 (Figure 5). When the solid-sealing buckle cover 7 is pressed down, An inverted connection is formed between the solid-sealing buckle cover arm 71 and the solid-sealing base flange 31, which can make the solid-sealing buckle cover 7 and the solid-sealing base 3 tightly connected, and the solid-sealing buckle cover 7 is not removable. If it is destructively dismantled, it cannot be used again. This forms the first layer of protection;

The bolt body 4, the wire retaining ring 5, and the anti-theft cap 6 are assembled into one body (Figure 3, Figure 4). When a screwdriver is used to apply a radial force to the cross-head slot 66 and a clockwise twisting force on the anti-theft cap 6, the stepped surface 62 and 42 are correspondingly attached and transferred torsion force, driving the bolt body 4 to rotate, so that the bolt body 4 is fastened to the license plate 1. When the anti-theft cap 6 rotates counterclockwise, the anti-theft cap 6 and the bolt body 4 slide and separate relative to each other along the inclined surfaces 61 and 41 to form an idling effect, and the bolt body 4 will not be loosened. This unidirectional transmission of torsion prevents the bolt body 4 from being disassembled by external forces. This forms a second tamper protection.

As shown in Figure 2, Figure 3, Figure 4, when assembling the bolt components, first use the open structure and elastic characteristics of the wire retaining ring 5 to sleeve the wire retaining ring 5 in the middle ring groove 44 of the bolt body 4 , And then assemble the anti-theft cap 6 together with the bolt body 4. When the bolt body 4 enters the inner cavity of the anti-theft cap 6 along the axial direction, the wire retaining ring 5 abuts against the mouth cone 65 of the anti-theft cap 6, and the cone 65 generates radial pressure on the wire retaining ring 5, compressing the wire retaining ring 5 to deform and shrink , Make the wire retaining ring 5 completely enter the ring groove 44, continue to move the bolt body 4 axially, when it moves to the position of the ring groove 64, the radial pressure of the wire retaining ring 5 is released, and the wire retaining ring 5 rebounds into the ring groove 64 middle. Half of the wire retaining ring 5 is in the ring groove 64, and half is in the ring groove 44. The wire retaining ring 5 cannot move axially in the ring groove 64. The wire retaining ring 5 can be used for a limited amount in the ring groove 44 along with the anti-theft cap 6的axial movement. When the anti-theft cap 6 rotates counterclockwise, the wire retaining ring 5 will move up and down with the anti-theft cap 6. When moving upwards, the wire retaining ring 5 abuts between the upper side 43 of the ring groove and the lower side 63 of the ring groove to generate resistance, which acts as a positioning function, so that the anti-theft cap 6 and the bolt body 4 cannot be separated.

The structural shape of the anti-theft cap 6 completely covers the bolt body 4 like a cap. Common tools cannot contact and apply force to the bolt body 4. The difficulty of clamping common tools (such as pliers) greatly enhances the anti-theft ability. In particular, the anti-theft cap 6 belongs to a machined structural part, and its anti-damage ability is much greater than that of the solid-sealed buckle cap 7 which is a sheet metal. This forms the third tamper protection.

In order to prevent loosening during use, the anti-loosening washer 2 preferably uses an external serrated lock washer or a butterfly-shaped washer to assist the fastening function.

When the license plate needs to be removed under special circumstances (such as maintenance and transfer of ownership), after destructively removing (such as cutting) the anti-theft cap 6, use special methods or common tools (such as pliers) to clamp the cylindrical surface of the head of the bolt body 4 At position 45, the bolt body 4 can be unscrewed, avoiding the possibility of using an electric drill to damage the thread of the nut on the vehicle.

The solid sealing device is made of steel or alloy materials.

The above are the preferred embodiments of the present invention. Any other form changes made without departing from the essential principles of the design of the present invention should be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

An anti-theft and solid sealing device for motor vehicle license plates. It is composed of anti-loosening washer 2, solid sealing base 3, bolt parts (bolt body 4, wire retaining ring 5, anti-theft cap 6 assembly), and solid sealing buckle cover 7. The anti-loose gasket 2 serves to prevent vibration from loosening, and the solid-sealing buckle cover 7 has an inverted buckle structure for primary protection. It is characterized in that: the bolt components are designed as a single body structure, which has one-way transmission after assembly, and is an inseparable body. The bolt body 4 is protected by the anti-theft cap 6, and it is impossible to directly apply force to the bolt body 4 with common tools. The solid sealing device has deep anti-disassembly and anti-theft functions, as well as good safety and maintenance performance. This is the core technology of the present invention.
The anti-theft sealing device for a license plate according to claim 1, wherein the upper end of the anti-theft cap 6 and the upper end of the bolt body 4 each have multi-tooth inclined surfaces 61, 41; there are stepped surfaces 62, 42 between the inclined surfaces to form a torsion transfer The bearing surface; when the anti-theft cap 6 rotates clockwise, the bolt body 4 is driven to rotate so that the bolt components are tightened. When the anti-theft cap 6 rotates counterclockwise, the anti-theft cap 6 and the bolt body 4 slide and separate along the inclined surfaces 61 and 41 to form an idling effect, and the bolt body 4 will not be loosened. The above structure guarantees the one-way torque transmission characteristics of the bolt components, and realizes the anti-disassembly and anti-theft functions.
The anti-theft sealing device for a license plate according to claim 1, wherein the anti-theft cap 6 has a ring groove 64 at the lower end, the bolt body 4 has a ring groove 44 in the middle, and the wire retaining ring 5 is installed in the two ring grooves 64 and Among 44, this structure limits the separation of the anti-theft cap 6 and the bolt body 4, so that the bolt parts cannot be separated by conventional tools, and become an inseparable functional unit.
The anti-theft sealing device for a license plate according to claim 1, wherein the shape of the anti-theft cap 6 is preferably circular and conical, and the head of the bolt body 4 is wrapped in the interior of the anti-theft cap 6, which is both beautiful and strong In order to prevent clamping, the path through which commonly used tools directly apply force to the bolt body 4 is blocked, and the structure of the anti-theft cap 6 protects and strengthens the anti-disassembly function.
The anti-theft sealing device for a license plate according to claim 1, characterized in that, as an auxiliary function of anti-theft and anti-loosening, the anti-loosening washer 2 is preferably an external serrated lock washer or a butterfly-shaped washer.
The anti-theft sealing device for a license plate according to claim 1, characterized in that, when the sealing device needs to be legally removed, the anti-theft cap 6 can be removed by a destructive method, and the cylindrical part 45 can be clamped by the upper part of the bolt body 4. Use conventional tools to unscrew the bolt body 4 to avoid the possibility of damaging the nut threads on the vehicle and achieve safe maintenance performance.