阅读说明：本技术 一种机动车辆号牌防盗固封装置 (Anti-theft fixing and sealing device for motor vehicle number plate ) 是由 李英宇 于 2020-04-02 设计创作，主要内容包括：本发明是一种机动车辆号牌防盗固封装置。螺栓部件采用分体式结构(如附图2),螺栓组件装配后形成一个整体不能再次分离。通过特殊的结构设计,螺栓部件单向传递动力,只能旋进不能旋出,且螺栓本体4被防盗帽6包裹保护,具备很强的防拆防盗功能；同时也具备良好的维护功能,可以有效避免合法拆卸固封装置时可能造成对车辆本体螺母螺纹的损坏,使防盗功能和维护功能都达到完美结合而不相互影响。(The invention relates to an anti-theft fixing and sealing device for motor vehicle license plates. The bolt component adopts a split structure (as shown in figure 2), and the bolt component forms a whole after being assembled and can not be separated again. Through special structural design, the bolt component transmits power in one direction, can only be screwed in but not screwed out, and the bolt body 4 is wrapped and protected by the anti-theft cap 6, so that the anti-theft bolt has a strong anti-disassembly and anti-theft function; meanwhile, the anti-theft device has a good maintenance function, and can effectively avoid damage to the nut threads of the vehicle body when the solid sealing device is legally detached, so that the anti-theft function and the maintenance function are perfectly combined without mutual influence.)

1. An anti-theft fixing and sealing device for motor vehicle license plates. The anti-loosening device is composed of an anti-loosening gasket 2, a fixed seal base 3, a bolt component (a bolt body 4, a steel wire retainer ring 5 and an anti-theft cap 6 combined component) and a fixed seal buckling cover 7. The anti-loosening gasket 2 plays a role in vibration anti-loosening, and the fixed sealing cover 7 with the inverted buckle structure plays a role in primary protection. The method is characterized in that: the bolt part is designed into the component structure, has one-way transmission nature after the equipment, and is inseparable integrative, and bolt body 4 is protected by theftproof cap 6, uses the instrument commonly used can't directly apply the effort to bolt body 4 on, makes solid sealing device have deep and prevents tearing open, theftproof function, possesses good safety maintenance performance simultaneously. This is the core technology of the present invention.

2. The license plate antitheft sealing device of claim 1 wherein the upper end of the inside of the antitheft cap 6 and the upper end of the bolt body 4 are respectively provided with a multi-tooth inclined surface 61, 41; step surfaces 62 and 42 are arranged between the inclined surfaces to form a stress surface for transferring torsion; when the anti-theft cap 6 rotates clockwise, the bolt body 4 is driven to rotate so that the bolt component is screwed tightly. When the anti-theft cap 6 rotates anticlockwise, the anti-theft cap 6 and the bolt body 4 slide and separate along the inclined surfaces 61 and 41, an idling effect is formed, and the bolt body 4 cannot be loosened. The structure ensures the characteristic of unidirectional torque transmission of the bolt component, and realizes the anti-dismounting and anti-theft functions.

3. The license plate antitheft sealing device of claim 1 wherein the lower end of the inside of the antitheft cap 6 is provided with an annular groove 64, the middle part of the bolt body 4 is provided with an annular groove 44, and the wire retainer 5 is installed in the two annular grooves 64 and 44, which restricts the separation of the antitheft cap 6 from the bolt body 4, so that the bolt member cannot be separated by a conventional tool and becomes an inseparable functional whole.

4. The license plate anti-theft sealing device of claim 1, wherein the shape of the anti-theft cap 6 is preferably circular arc and conical, and the head of the bolt body 4 is wrapped inside the anti-theft cap 6, which is beautiful and has the function of preventing clamping, and the path of the common tool directly applying acting force to the bolt body 4 is blocked, and the structure protection and the anti-dismantling function of the anti-theft cap 6 are enhanced.

5. The license plate anti-theft sealing device of claim 1, wherein when the sealing device needs to be legally dismantled, the anti-theft cap 6 can be removed by a destructive method, and then the bolt body 4 is screwed out by using a conventional tool through the upper part of the bolt body 4, which can clamp the cylindrical part 45, so that the possibility of damaging the nut thread on the vehicle is avoided, and the safe maintenance performance is realized.

Technical Field

The invention relates to a motor vehicle license plate fixing and sealing device.

Background

The motor vehicle license plate sealing device has two basic performances of sufficient theft prevention and safe maintenance. However, in real life, the vehicle license plate is often easily disassembled and stolen, and the situation of unsafe maintenance also exists, so that the public safety and the industry management are seriously influenced, and how to realize and balance the two functions is a problem to be solved.

According to the public safety industry standard of the people's republic of China: the motor vehicle license plate fixing and sealing device GA804-2008 is mainly composed of a bolt, a nut, a fixing and sealing base and a fixing and sealing buckle cover. The fixing and sealing buckle cover is basically a sheet metal part and is the first safety defense line of the fixing and sealing device, and various types do not have obvious essential differences in the aspect. The structure of the bolt becomes a second safety line, and in the existing practical application, the bolt is roughly of the following types:

1. ordinary cross head bolts: the bolt has almost no anti-theft function, and once the fixing and sealing buckle cover made of sheet metal is damaged, the bolt can be freely detached. The anti-theft capability of the fixing and sealing device depends on the protection capability of a sheet metal, generally speaking, the sheet metal structure is easy to damage, the anti-theft capability is limited, and the fixing and sealing device is a type needing improvement.

An S-shaped straight-head screw: the screw design idea is one-way anti-back, for example, the anti-back screw disclosed in patent ZL96212250.5, the anti-theft capability is superior to that of a common crosshead bolt, but the anti-back screw is a relative concept, the essence of the screw is a special-shaped head screw, the cap part of the screw still has a force point and a force surface, once the fixing and fastening cover is damaged, the screw is exposed in front of the operator, and can be disassembled by using a special tool (method) or a special device, and the defect exists; under the condition of needing destructive disassembly, if no special tool is provided, when an electric drill is needed, nut threads on a vehicle can be damaged, larger damage and trouble are caused, and the license plate cannot be continuously installed or the performance is influenced.

3. Self-destructing bolts. After the process head is twisted off in the installation process, the bolt cannot rotate reversely and has the anti-disassembly function, for example, the anti-theft fastening device for the license plate disclosed by the patent ZL200520098250.X has the anti-theft capability superior to that of an S-shaped straight-head screw. However, the situation that secondary screwing cannot be performed exists, and the situation cannot guarantee that all the fixing and sealing devices on the same license plate are stressed in a balanced manner and screwed synchronously, cannot be compensated, and influences the fastening effect; there are also situations and consequences in which the nut thread on a vehicle may be damaged in the event that destructive stripping is required.

Disclosure of Invention

Based on providing higher anti-dismantling and anti-theft capability and having a method for avoiding damaging the nut and the thread of the vehicle body during maintenance, the invention solves various insufficient factors of the bolt in reality, designs a brand-new bolt structure, subverts the concept that the traditional bolt is integrated, overcomes various defects listed in the background technology by the new structure, has relatively simple structure, realizes multiple anti-dismantling protection, achieves very strong anti-theft capability and stable and safe maintenance performance, and reasonably, effectively balances and solves the functions of the two which seem to be contradictory with each other.

The technical core of the invention is a bolt component, the bolt adopts a split structure, as shown in the attached figures 3 and 4, the bolt component is composed of a bolt body 4, a steel wire retainer ring 5 and an anti-theft cap 6, and three parts are connected into a whole after being assembled through unique structural design, so that the bolt component has the following functions:

the upper end surface of the anti-theft cap 6 is provided with a crosshead 66 structure, and the interior of the bolt part is provided with adaptive inclined surfaces 61 and 41 and step surfaces 62 and 42 which play roles of sliding and transmitting torque. When the screwdriver can be used for clockwise rotation, the torque can be transmitted to tighten the bolt body 4, when the screwdriver rotates anticlockwise, the torque can not be transmitted, and the transmission unidirectional property achieves the purposes of deep anti-dismantling and anti-theft of the bolt body 4.

The inside limit structure who uses steel wire retaining ring 5 of bolt part has restricted the scope of the mutual displacement of theftproof cap 6 and bolt body 4, and then has guaranteed that theftproof cap 6 and bolt body 4 can not separate, and theftproof cap 6 has wrapped up whole bolt body 4, has completely protected bolt body 4 not to expose, uses conventional tools such as screwdriver, pliers, adjustable spanner, sleeve can't touch bolt body 4, just can't become flexible bolt body 4, has played the guard action. Unless destructively separated, the seal is not reusable after being destroyed.

When the license plate needs to be disassembled for special reasons (such as maintenance and passing), the anti-theft cap 6 is damaged, the cylindrical surface 65 on the bolt body is clamped, and the bolt body 4 can be screwed out without damaging the nut threads on the vehicle.

The fixing and sealing device is also provided with a matched anti-loosening gasket 2 and a fixing and sealing base 3. The anti-loosening gasket 2 plays a role in vibration anti-loosening, and the fixed sealing base 3 plays a role in fixing the fixed sealing buckle cover 7 and protecting the bolt component.

Drawings

FIG. 1 is a schematic view of the installation and use of the sealing device

FIG. 2 perspective view showing the assembly effect of bolt parts

FIG. 3 is a schematic view of bolt assembly (exploded one)

FIG. 4 is a schematic view of bolt assembly (exploded two)

FIG. 5 sealing base

FIG. 6 shows a fastening buckle

Detailed Description

Four inward-concave support arms 71 (shown in figure 6) are manufactured on the periphery of the sealing buckle cover 7, a flange 31 (shown in figure 5) is arranged at the top of the sealing base 3, and after the sealing buckle cover 7 is pressed down, the support arms 71 of the sealing buckle cover and the flange 31 of the sealing base form reverse buckling connection, so that the sealing buckle cover 7 and the sealing base 3 can be connected and fastened, and the sealing buckle cover 7 cannot be detached. If destructively removed, it cannot be reused. This forms a first layer of protection;

when a screwdriver is used for applying radial force and clockwise rotation torsion to the crosshead slot 66 to the anti-theft cap 6, the step surfaces 62 and 42 are correspondingly attached and transmit the torsion to drive the bolt body 4 to rotate, so that the bolt body 4 fastens the license plate 1. When the anti-theft cap 6 rotates anticlockwise, the anti-theft cap 6 and the bolt body 4 relatively rotate and slide along the inclined surfaces 61 and 41, and are separated, so that an idling effect is formed, and the bolt body 4 cannot be loosened. This unidirectional torque transmission prevents the bolt body 4 from being removed by an external force. This forms a second tamper protection.

As shown in fig. 2, fig. 3 and fig. 4, when assembling the bolt component, the steel wire retainer ring 5 is firstly sleeved in the middle ring groove 44 of the bolt body 4 by utilizing the opening structure and the elastic characteristic of the steel wire retainer ring 5, and then the steel wire retainer ring is assembled with the anti-theft cap 6 along 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 steel wire retainer ring 5 butts against the conical surface 65 of the opening part of the anti-theft cap 6, the conical surface 65 generates radial pressure on the steel wire retainer ring 5, the steel wire retainer ring 5 is compressed to deform and contract, the steel wire retainer ring 5 completely enters the annular groove 44, the bolt body 4 continues to move in the axial direction, when the bolt body moves to the position of the annular groove 64, the radial pressure of the steel wire retainer ring 5 is relieved, and the steel wire retainer ring 5 rebounds to enter the annular groove 64. The wire retainer ring 5 is half in the ring groove 64 and half in the ring groove 44, the wire retainer ring 5 cannot axially move in the ring groove 64, and the wire retainer ring 5 can axially move in the ring groove 44 with the anti-theft cap 6 in a limited amount. When the anti-theft cap 6 rotates anticlockwise, the steel wire retainer ring 5 moves up and down along with the anti-theft cap 6. When moving upwards, the steel wire retainer ring 5 butts against between the ring groove upper side 43 and the ring groove lower side 63 to generate resistance, so as to play a positioning role, and the anti-theft cap 6 and the bolt body 4 can not be separated.

The anti-theft cap 6 is completely covered on the bolt body 4 like a cap, common tools cannot contact and apply acting force to the bolt body 4, the anti-theft cap 6 is designed into an optimal arc-shaped and conical structure, the clamping difficulty of the common tools (such as pliers) is increased, and the anti-theft capacity is greatly improved. In particular, the anti-theft cap 6 belongs to a processing structural part, and the damage prevention capability is far higher than that of a fixing and sealing buckle cover 7 belonging to a metal plate. This forms a third tamper protection.

To achieve anti-loosening during use, the anti-loosening gasket 2 is preferably an external sawtooth locking washer or a butterfly washer to assist the fastening function.

When the license plate needs to be disassembled under special conditions (such as maintenance and passing), after the anti-theft cap 6 is destructively disassembled (such as cutting), the cylindrical surface part 45 which can exert force on the head part of the bolt body 4 is clamped through a special method or a common tool (such as pliers), and the bolt body 4 can be screwed out, so that the possibility that the nut thread on a vehicle is damaged by using an electric drill is avoided.

The fixing and sealing device is made of steel or alloy materials.

The foregoing is a preferred embodiment of the present invention, and any other changes that can be made in the form and details without departing from the spirit and scope of the invention are to be considered as equivalent and encompassed within the scope of the present invention.