Anti-theft bolt for one-way locking

Abstract

The utility model relates to an anti-theft bolt for one-way locking. The anti-theft bolt comprises a bolt head; the bolt tail part is integrally connected to one side of the bolt head part; the sleeve groove is formed in the side, away from the bolt tail, of the bolt head. The sleeve groove is formed by a plurality of sets of one-way tightening units in a circular array mode. According to the anti-theft bolt for one-way locking, through the one-way tightening units arranged in an array mode, a sleeve groove in an inner plum blossom shape is formed in the head of the bolt, when a conventional plum blossom starting tool is used for clockwise driving tightening and anticlockwise disassembling, a gun head is not provided with a stress supporting point, so that slipping is caused, and the anti-theft effect of the bolt is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of theftproof bolt, specifically relates to a one-way locking theftproof bolt. BACKGROUND

[0002] Bolt: mechanical parts, nut's cylindrical threaded fastener. By the head and screw rod (cylinder with external thread) two parts of a class of fasteners, with nut cooperation, used for fastening connection two with through hole parts, in some cases, bolt can also be used alone. This connection form is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

[0003] Bolt is very common in daily life, small to daily household appliances, large to spacecraft, aircraft and so on cannot leave bolt. The types of bolts are also many, according to the head shape, it can be divided into hexagonal head bolt, square head bolt, round head bolt and countersunk head bolt, according to the use, it can be divided into anchor bolt, horse bolt and double head bolt, according to the performance grade, it can be divided into high strength bolt and ordinary bolt etc.

[0004] The head shape of most existing bolts is generally quadrilateral, outer hexagonal, inner hexagonal plum blossom shape, the tools for installing and dismounting these bolts are also standard parts, which can be bought everywhere in the market, so the bolts are very easy to be dismounted, and the locked parts are very easy to be stolen, thereby causing unnecessary loss to the user. INVENTION CONTENTS

[0005] The utility model provides a one-way locking theftproof bolt, solve the defect that the existing bolt is easy to be stolen.

[0006] In order to achieve the above object, the utility model adopts the technical scheme:

[0007] Bolt head;

[0008] Bolt tail, the bolt tail is integrally connected on one side of the bolt head;

[0009] Sleeve groove, the sleeve groove is arranged on the side of the bolt head away from the bolt tail;

[0010] The sleeve groove is formed by a plurality of one-way tightening unit circular arrays.

[0011] Optimally, each group of the one-way tightening unit comprises an inclined slip part, a limiting part connected on the side of the slip part away from the bolt head axis, a tightening part connected on the side of the limiting part away from the slip part and a transition part connected on the side of the tightening part away from the limiting part.

[0012] Optimally, the limiting portion is arc-shaped with the arc center pointing to the axis of the bolt head, one side of the limiting portion being tangent to the slipping portion, and the other side of the limiting portion being tangent to the tightening portion.

[0013] Optimally, the tightening portion is arc-shaped with the arc center pointing away from the axis of the bolt head, and the other side of the tightening portion being tangent to the transition portion.

[0014] Optimally, the transition portion is arc-shaped with the arc center pointing away from the axis of the bolt head, and the other side of the transition portion being tangent to the slipping portion of the adjacent one-way tightening unit.

[0015] Optimally, it further comprises an abutting disc integrally connected between the bolt head and the bolt tail, the diameter of the abutting disc being larger than the diameter of the bolt head and the bolt tail.

[0016] Optimally, it further comprises a protruding portion integrally arranged on the peripheral surface of the bolt head and connected with the abutting disc, the protruding portion being arc-shaped with the arc center pointing to the abutting disc.

[0017] Optimally, it further comprises an external thread arranged on the peripheral surface of the bolt tail and a guide portion obliquely arranged on the side of the bolt tail away from the bolt head, the width of the side of the guide portion close to the bolt tail being larger than the width of the side of the guide portion away from the bolt tail.

[0018] Thanks to the use of the above technical solutions, the utility model has the following advantages compared with the prior art:

[0019] The one-way locking anti-theft bolt forms a sleeve groove in the shape of inner plum blossom at the bolt head through the arrayed one-way tightening units, and the conventional plum blossom starting tool can only be driven to tighten in the clockwise direction, and when disassembled in the counterclockwise direction, the gun head has no force supporting point, leading to slipping, thus playing the role of bolt anti-theft. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of the utility model;

[0021] Figure 2 is a left view of the utility model;

[0022] Figure 3 is a partial structure schematic view of the utility model Figure 2 ;

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, bolt head; 2, bolt tail; 3, external thread; 4, guide portion; 5, abutting disc; 6, protruding portion; 7, sleeve groove; 8, slipping portion; 9, limiting portion; 10, tightening portion; 11, transition portion. DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the embodiments shown in the drawings.

[0026] As Figure 1 , 2 shown, it is the schematic diagram of the utility model one-way locking with anti-theft bolt, the anti-theft bolt is usually applied on the important parts such as black box, motor, electric control, license plate etc.The anti-theft bolt includes bolt head 1, bolt tail 2, external thread 3, guide part 4, abutment disc 5, convex part 6 and sleeve groove 7.

[0027] Bolt tail 2 is integrally connected on one side of bolt head 1, and external thread 3 is arranged on the outer circumferential surface of bolt tail 2.In actual use process, the internal thread of external thread 3 matches the thread hole, so as to fix the black box, motor, electric control, license plate etc.on the corresponding mounting plate.

[0028] Guide part 4 is obliquely arranged on the side of bolt tail 2 away from bolt head 1, as Figure 1 shown, the diameter of guide part 4 near bolt tail 2 is greater than the diameter of guide part 4 away from bolt tail 2, and by arranging guide part 4, the anti-theft bolt is guided when being screwed in.

[0029] Abutment disc 5 is integrally connected between bolt head 1 and bolt tail 2, and the diameter of abutment disc 5 is greater than the diameter of bolt head 1 and bolt tail 2.In actual tightening, abutment disc 5 abuts at the corresponding fixed position, and because the diameter of abutment disc 5 is larger, the contact area is larger, and the stability of the bolt is stronger.

[0030] Convex part 6 is integrally arranged on the outer circumferential surface of bolt head 1 and connected with abutment disc 5, and convex part 6 is arc-shaped and the arc center is towards abutment disc 5.The arc-shaped convex part 6 plays an aesthetic role on one hand, and the smooth outer surface avoids scratching the workers during installation, which is more secure.

[0031] Sleeve groove 7 is arranged on the side of bolt head 1 away from bolt tail 2, as Figure 2 shown, sleeve groove 7 is formed by a plurality of one-way tightening units circular array (in this embodiment, there are six groups of one-way tightening units).By arranging the one-way tightening unit, the conventional torx starting tool can only be driven clockwise to tighten, and when disassembling counterclockwise, the gun head has no force supporting point, which leads to slipping, so as to play a theft-proof role.

[0032] As Figure 3As shown, each group of one-way tightening units comprises a skid portion 8, a limiting portion 9, a tightening portion 10 and a transition portion 11. The skid portion 8 is arranged obliquely, the limiting portion 9 is connected to the side of the skid portion 8 away from the axis of the bolt head 1, the limiting portion 9 is arc-shaped with the arc center facing the axis of the bolt head 1. One side of the limiting portion 9 is tangent to the side of the skid portion 8 away from the axis of the bolt head 1, and the other side of the limiting portion 9 is tangent to the tightening portion 10.

[0033] The tightening portion 10 is arc-shaped with the arc center away from the axis of the bolt head 1, the other side of the tightening portion 10 is tangent to the transition portion 11, the transition portion 11 is arc-shaped with the arc center away from the axis of the bolt head 1, and the other side of the transition portion 11 is tangent to the skid portion 8 of the adjacent one-way tightening unit.

[0034] Each group of one-way tightening units is surrounded by the skid portion 8, the limiting portion 9, the tightening portion 10 and the transition portion 11, and the sleeve groove 7 is surrounded by a plurality of groups of one-way tightening units connected in sequence, and the sleeve groove 7 is in the shape of an internal hexagonal plum blossom. The conventional plum blossom starting tool can only drive the tightening clockwise (when tightening, the wrench is in abutment with the tightening portion 10), and when disassembling counterclockwise, the wrench has no supporting point for the obliquely arranged skid portion 8, so the gun head has no force supporting point, which causes skidding and cannot be unscrewed, thereby achieving the effect of bolt theft prevention.

[0035] Further, the mechanical performance grade of the bolt is 8.8.

[0036] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A one-way locking anti-theft bolt, characterized in that it It comprises: a bolt head (1); a bolt tail (2) integrally connected to one side of the bolt head (1); a sleeve groove (7) formed on the side of the bolt head (1) away from the bolt tail (2); The sleeve groove (7) is formed by a plurality of groups of one-way tightening unit circular arrays.

2. The anti-theft bolt for one-way locking according to claim 1, characterized in that: Each group of one-way tightening units comprises an inclined slip portion (8), a limiting portion (9) connected to the side of the slip portion (8) away from the axis of the bolt head (1), a tightening portion (10) connected to the side of the limiting portion (9) away from the slip portion (8), and a transition portion (11) connected to the side of the tightening portion (10) away from the limiting portion (9).

3. The one-way locking security bolt according to claim 2, wherein: The limiting portion (9) is arc-shaped with the arc center facing the axis of the bolt head (1), one side of the limiting portion (9) tangent to the slip portion (8), and the other side tangent to the tightening portion (10).

4. The anti-theft bolt for one-way locking according to claim 3, characterized in that: The tightening portion (10) is arc-shaped with the arc center away from the axis of the bolt head (1), and the other side is tangent to the transition portion (11).

5. The one-way locking security bolt according to claim 4, wherein: The transition portion (11) is arc-shaped with the arc center away from the axis of the bolt head (1), and the other side is tangent to the slip portion (8) of the adjacent one-way tightening unit.

6. The one-way locking security bolt according to claim 1, wherein: It also comprises an abutting disc (5) integrally connected between the bolt head (1) and the bolt tail (2), and the diameter of the abutting disc (5) is greater than the diameter of the bolt head (1) and the bolt tail (2).

7. The one-way locking security bolt according to claim 6, wherein: It also comprises a protruding portion (6) integrally arranged on the peripheral surface of the bolt head (1) and connected to the abutting disc (5), which is arc-shaped with the arc center facing the abutting disc (5).

8. The one-way locking security bolt according to claim 1, wherein: It also comprises an external thread (3) arranged on the peripheral surface of the bolt tail (2) and a guide portion (4) arranged on the side of the bolt tail (2) away from the bolt head (1), and the width of the guide portion (4) near the bolt tail (2) is greater than the width of the guide portion (4) away from the bolt tail (2).

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