Anti-theft hand-tightened nut structure

Abstract

The application discloses an anti-theft hand-screwed nut structure, the side of the shell is provided with a flat channel, the nut assembly comprises a nut body with two ends exposed from the top and bottom of the shell respectively, and a locking disc coaxially fixed on the circumferential side of the nut body, the upper end surface of the locking disc is provided with a coaxial first annular track, the upper end surface edge of the locking disc is further provided with a locking groove intruding into the range of the first annular track, the shape of the locking groove is matched with the shape of a locking card, the lower end of the locking piece is provided with a group of mirror-symmetrical sliding tables, the sliding tables are matched and installed in the first annular track and fixed towards the channel, the upper end of the locking piece is connected with the inner top surface of the shell, the locking card is slid and inserted into the locking groove through the channel, and the side surface of the locking card is in contact with the side surface of the two sliding tables. The application has the beneficial effects that the locking groove in the shell is not easy to be observed, the user can also rotate the locking groove to an unobservable position, and the safety of the anti-theft nut is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of anti-theft fastener, in particular to an anti-theft hand nut structure. BACKGROUND

[0002] Considering the convenience of disassembly and assembly, most of the vehicle-mounted outdoor products (such as roof racks) will choose to be installed on the vehicle by using hand bolts and hand nuts. However, the hand bolts and hand nuts have no anti-theft function, and the products exposed outdoors are easy to be directly loosened and taken away by people. In order to realize the anti-theft function of the fastener, various forms of anti-theft fasteners appear in the prior art, such as the anti-theft bolt disclosed in Chinese utility model patent CN202144824U, which is composed of a screw rod, a nut, a nut lock pin and a key. A lock groove is vertically formed on the outer wall of the screw rod, a through lock hole is formed on the side wall of the nut, the nut is screwed on the screw rod, the lock hole corresponds to the lock groove, a key hole is longitudinally formed on the end of the nut lock pin, the nut lock pin is screwed in the lock hole by using the key, the inner end of the nut lock pin is located in the lock groove of the screw rod, the key is inserted into the key hole of the nut lock pin and rotated, the nut lock pin can be rotated in or out, the shape of the key corresponds to the shape of the key hole, and the key can be repeatedly used, thereby saving cost.

[0003] However, the key hole of the above anti-theft bolt is exposed, which can be easily copied by other people according to the shape of the key hole within a short time, and the anti-theft performance is very low. SUMMARY

[0004] In view of the above problems, the present application provides an anti-theft hand nut structure, which aims to solve the problem of low safety of the key hole of the existing anti-theft bolt.

[0005] To solve the above technical problems, the technical scheme of the present application is as follows:

[0006] The application discloses an anti-theft hand-tightened nut structure, which comprises a hollow shell, a nut assembly and a locking piece coaxially arranged in the shell, wherein the lateral surface of the shell is provided with a flat channel, the nut assembly comprises a nut body with two ends exposed from the top and bottom of the shell respectively, and a locking disc coaxially fixed on the lateral surface of the nut body, the upper end surface of the locking disc is provided with a coaxial first annular track, and the upper end surface edge of the locking disc is further provided with a locking groove intruding into the range of the first annular track, the shape of the locking groove is matched with the shape of a locking card, the middle part of the locking piece is provided with a first avoiding hole for avoiding the nut body, the lower end of the locking piece is provided with a group of mirror-symmetrical sliding tables, the sliding tables are matched and arranged in the first annular track and fixed towards the channel, the upper end of the locking piece is connected with the inner top surface of the shell, the locking card is slid and inserted into the locking groove through the channel, and the lateral surface of the locking card is in contact with the lateral surface of the two sliding tables.

[0007] In some embodiments, the opposite sides of the two sliding tables are provided with longitudinal limiters, and the lower end surface of the limiter is in contact with the upper end surface of the locking card.

[0008] In some embodiments, the shell comprises an upper shell and a lower shell matched and buckled with each other, and the centers of the upper shell and the lower shell are respectively provided with a second avoiding hole and a third avoiding hole for exposing the end surface of the nut body.

[0009] In some embodiments, a hand pushing piece and a connecting column fixed on the bottom end of the hand pushing piece are further included, the upper end surface of the upper shell is provided with a mounting hole on the side away from the channel, the width of the mounting hole is greater than the width of the connecting column, the connecting column enters the shell from the mounting hole and is fixedly connected with the locking piece, and the top of the upper shell is provided with a straight guide rail parallel to the insertion direction of the locking card, and the two lateral surfaces of the locking piece are slidably arranged along the straight guide rail.

[0010] In some embodiments, the side of the locking piece close to the channel is provided with an elastic piece.

[0011] In some embodiments, the inner side of the upper shell is provided with a vertical mounting column, the surface of the lower shell is provided with circumferentially distributed fixing holes, and a fixing piece enters the corresponding mounting column from the fixing hole.

[0012] In some embodiments, the upper part of the nut body is located in the second avoiding hole, the lower part of the nut body extends from the third avoiding hole, and the lower part of the nut body is in clearance fit with the third avoiding hole.

[0013] In some embodiments, the upper end surface of the lower shell is provided with a coaxial second annular track, and the lower end surface of the locking disc is provided with a convex ring for entering the second annular track.

[0014] In some embodiments, the locking grooves are circumferentially distributed on the upper end surface edge of the locking disc, and there is no overlapping interference between adjacent locking grooves.

[0015] In some embodiments, the sliding table has and only one set.

[0016] The present application has the advantages that: by arranging a rotatable or locking nut body in a hollow shell, and then arranging a flat channel on the side of the shell as an insertion opening for the locking card, since the channel is flat, the locking grooves inside the shell are not easy to be observed, and the channel and the locking grooves can be rotated, so the user can also rotate the locking grooves to a position that cannot be observed, greatly improving the security of the anti-theft nut. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Explosion of the anti-theft hand-tightening nut structure disclosed in the embodiments of the present application Figure 1 ;

[0018] Figure 2 Explosion of the anti-theft hand-tightening nut structure disclosed in the embodiments of the present application Figure 2 ;

[0019] Figure 3 Schematic view of the anti-theft hand-tightening nut structure disclosed in the embodiments of the present application in a locked state and hidden behind the shell

[0020] Figure 4 Schematic view of the anti-theft hand-tightening nut structure disclosed in the embodiments of the present application in a locked state

[0021] Figure 5 Schematic view of the anti-theft hand-tightening nut structure disclosed in the embodiments of the present application in a slipping state

[0022] Wherein: 1 - shell, 2 - nut assembly, 3 - locking piece, 4 - channel, 5 - locking card, 101 - upper shell, 102 - lower shell, 103 - second avoiding hole, 104 - third avoiding hole, 105 - hand pushing piece, 106 - connecting column, 107 - mounting hole, 108 - straight line guide rail, 109 - mounting column, 110 - fixing hole, 111 - second annular track, 201 - nut body, 202 - locking disc, 203 - first annular track, 204 - locking groove, 205 - convex ring, 301 - first avoiding hole, 302 - sliding table, 303 - longitudinal limiting piece, 304 - elastic piece. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear and explicit, the content of the present application is further described in detail below in combination with the drawings and specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that only the parts related to the present application are shown in the drawings for the convenience of description, but not all the contents.

[0024] The present embodiment proposes a kind of anti-theft hand nut structure, as shown in Figure 1 Including hollow shell 1, and nut assembly 2 and locking piece 3 coaxially installed in the inside of shell 1, wherein the side of shell 1 is provided with the flat channel 4, nut assembly 2 includes the nut body 201 that two ends respectively expose from the top and bottom of shell 1, and the locking disc 202 fixed coaxially on the peripheral side of nut body 201, the upper end surface of locking disc 202 is provided with the coaxial first annular track 203, the upper end surface edge of locking disc 202 is also provided with the locking groove 204 intruding the range of first annular track 203, the shape of locking groove 204 is matched with the shape of locking card 5, the middle part of locking piece 3 is provided with the first avoiding hole 301 for avoiding nut body 201, the lower end of locking piece 3 is provided with a group of mirror image symmetrical sliding table 302, sliding table 302 is matched and installed in first annular track 203 and fixed towards channel 4, the upper end of locking piece 3 is connected with the inner top surface of shell 1, locking card 5 is slidably inserted into locking groove 204 through channel 4, and the side surface of locking card 5 is in contact with the side surface of two sliding tables 302.

[0025] In the present embodiment, by setting rotatable or locking nut body 201 in a hollow shell 1, then setting a flat channel 4 as the insertion port of locking card 5 on the side of shell 1, since channel 4 is flat, it is not easy to observe the locking groove 204 inside shell 1, and rotation can be carried out between channel 4 and locking groove 204, so the user can also rotate locking groove 204 to an unobservable position, greatly improving the security of anti-theft nut.

[0026] The locking state and slip state of the present anti-theft hand nut structure are described below.

[0027] Locking state: for normal screwing task (including installation and disassembly), first, the user needs to twist shell 1 first, align channel 4 with locking groove 204 (sliding table 302 and channel 4 are in fixed relationship, sliding table 302 is always aligned with channel 4), then slide locking card 5 from channel 4 into locking groove 204, the matching relationship of locking card 5 and channel 4 in locking state is as shown in Figure 3 And 4At this time, the head of the locking card 5 is abutted against the side of the locking groove 204, and the two sides of the locking card 5 are abutted against the sides of the two sliding platforms 302 in a matched manner to form a locking state, so that when the user continues to twist the shell 1, the torque received by the shell 1 is first transmitted to the locking member 3 connected thereto. Since the sliding platform 302 at the lower end of the locking member 3 is in contact with the locking card 5, the torque is further transmitted to the locking card 5 at this time. The torque received by the locking card 5 is transmitted to the entire locking disc 202 through the locking groove 204, and finally the torque received by the locking disc 202 is first transmitted to the nut body 201 connected thereto. That is, the locking card 5 acts as an intermediate piece for transmitting torque in the present scheme. When the user inserts the locking card 5 into the locking groove 204, the nut body 201 and the shell 1 are temporarily fixed as a whole by the locking card 5 from the external appearance, and the user can control the nut body 201 to rotate simultaneously by twisting the shell 1. At this time, the present anti-theft hand-tightening nut structure is not different from a normal nut and can be successfully screwed with a common bolt and can be removed from the bolt. Actually, the torque received by the shell 1 needs to pass through the locking member 3, the sliding platform 302, the locking card 5, the locking groove 204, and the locking disc 202 in sequence before being transmitted to the nut body 201.

[0028] Slipping state: used for anti-theft task after screwing, when the locking card 5 is pulled out of the locking groove 204, the matching relationship between the locking card 5 and the channel 4 in the slipping state is as shown in Figure 5 The connection between the locking disc 202 and the locking member 3 is lost immediately, and when the user twists the shell 1, the torque received by the shell 1 can be transmitted to the locking member 3. However, since the sliding platform 302 at the lower end of the locking member 3 loses the limiting of the locking card 5, the sliding platform 302 can only rotate along the first annular track 203 indefinitely. From the external appearance, the nut body 201 and the shell 1 exhibit rotational slipping, and the user cannot control the nut body 201 to rotate simultaneously by twisting the shell 1, so the present anti-theft hand-tightening nut structure cannot be removed from the bolt. It should be noted that since the nut body 201 and the shell 1 exhibit rotational slipping, the user needs to twist the shell 1 (at this time, the nut body 201 has been fixed on a bolt, and the locking groove 204 and the locking disc 202 should be regarded as a fixing mechanism) before entering the locking state, and the sliding rotation relationship between the sliding platform 302 and the first annular track 203 is used until the channel 4 is aligned with the locking groove 204 to prepare for the sliding insertion of the locking card 5 from the channel 4 into the locking groove 204.

[0029] In the above scheme, the slide table 302 and the locking groove 204 only limit the side of the locking card 5. Specifically, the thickness of the locking card 5 is slightly greater than the depth of the locking groove 204. The purpose is that when the locking card 5 is inserted into the locking groove 204, the lower half of the locking card 5 fully occupies the space of the locking groove 204, so that the locking groove 204 generates stable lateral limiting to the locking card 5, and the protruding upper half of the locking card 5 can invade the range of the first annular track 203, so that the upper half of the locking card 5 is in contact with the slide table 302, so that the slide table 302 also generates stable lateral limiting to the locking card 5. In order to further fix the locking card 5 and avoid it from falling during the rotation of the shell 1, please continue to refer to Figure 1 , the opposite sides of the two slide tables 302 are provided with longitudinal limiting members 303, and the lower end surface of the longitudinal limiting member 303 is in contact with the upper end surface of the locking card 5, thereby providing longitudinal limiting for the locking card 5.

[0030] In this embodiment, since multiple components need to be installed inside the shell 1, considering the production efficiency, the shell 1 should adopt a detachable design. In an example, please continue to refer to Figure 1 , the shell 1 includes an upper shell 101 and a lower shell 102 that are matched and buckled with each other. The center of the upper shell 101 and the lower shell 102 is respectively provided with a second avoiding hole 103 and a third avoiding hole 104 for exposing the end surface of the nut body 201. Obviously, through the buckling design of the upper shell 101 and the lower shell 102, multiple components can be produced and assembled in advance, and finally installed in the upper shell 101 and the lower shell 102. The second avoiding hole 103 and the third avoiding hole 104 can be aligned with the two end surfaces of the nut body 201. The anti-theft hand-tightening nut structure in the locked state is no different from the ordinary nut, which is an up-down penetrating design. From Figure 2 , it can be seen that the upper shell 101 is a cover, and the lower shell 102 is a corresponding circle. Optionally, the upper shell 101 and the lower shell 102 can also be provided in a symmetrical shape, which can realize the buckling function.

[0031] The shape of the locking card 5 in this embodiment can be completely consistent with the shape of the locking groove 204. When the locking card 5 is inserted into the locking groove 204, the locking card 5 is completely immersed in the interior of the shell 1, and the user cannot pull out the locking card 5 by hand to release the locking state. In addition, the tail of the locking card 5 can be extended. When the locking card 5 is inserted into the locking groove 204, the tail of the locking card 5 is still outside the shell 1, and the user can pull out the locking card 5 by hand to release the locking state. However, although the latter can achieve quick extraction by extending the tail of the locking card 5, the total length of the locking card 5 should not be too large, otherwise it will affect the portability of the locking card 5 (equivalent to a key), and more importantly, the locking card 5 exposed outside the shell 1 is also easy to interfere with other nuts or the product itself, especially when the installation positions of the two nuts are very close. This embodiment provides one of the optional solutions for quick removal of the locking card 5, which is illustrated by the following examples. Specifically, refer to Figure 1 and Figure 2 It also includes a hand pushing piece 105 and a connecting column 106 fixed at the bottom end of the hand pushing piece 105. The upper end face of the upper shell 101 away from one side of the channel 4 is provided with a mounting hole 107, the width of the mounting hole 107 is greater than the width of the connecting column 106, the connecting column 106 enters the shell 1 from the mounting hole 107 and is fixedly connected with the locking piece 3. In this embodiment, since the width of the mounting hole 107 is greater than the width of the connecting column 106, the mounting hole 107 can allow the connecting column 106 to slide to a certain extent. The user pushes the hand pushing piece 105 towards the channel 4, thereby indirectly pushing the connecting column 106, the locking piece 3 and the locking disc 202 as a whole towards the channel 4 by a distance, which finally shows that the locking card 5 is pushed out of the channel 4 by a small distance, and the user can pull out the locking card 5 by hand to release the locking state.

[0032] It should be noted that in the above scheme, in order to realize the linear positioning of the locking piece 3, the scheme of "the two side surfaces of the locking piece 3 are slidingly installed along the linear guide rail 108" is adopted. When the locking card 5 is pushed out of the channel 4, the second avoiding hole 103 and the third avoiding hole 104 are no longer aligned with the two end surfaces of the nut body 201, that is, the nut body 201 cannot be normally screwed with the bolt. At this time, manual reset is needed, that is, the hand pushing piece 105 is pulled away from the channel 4. In view of the deficiency of the above scheme, in a more optimal scheme, the side of the locking piece 3 close to the channel 4 is provided with an elastic piece 304. Continue to refer to Figure 1Specifically, the two ends of the elastic member 304 are respectively abutted against the side of the locking member 3 close to the passage 4 and the inner wall of the upper shell 101. When the user pushes the hand pushing member 105 towards the passage 4, the elastic member 304 starts to store energy. When the user releases the hand pushing member 105, the elastic member 304 releases the elastic potential energy to push the locking member 3, the hand pushing member 105, the connecting column 106 and the locking disc 202 as a whole away from the passage 4 until the side of the locking member 3 abuts against the inner wall of the upper shell 101, and then stops. Finally, the second avoiding hole 103 and the third avoiding hole 104 are automatically aligned with the two end faces of the nut body 201. Optionally, a fixed column can be arranged on the side of the locking member 3 close to the passage 4, and a return compression spring can be arranged on the fixed column.

[0033] In addition, in the above scheme, the upper shell 101 and the lower shell 102 are designed to be matched and buckled. In order to improve the anti-theft performance, referring to Figure 1 and Figure 2 the inner side of the upper shell 101 is provided with a vertical mounting column 109, and the surface of the lower shell 102 is provided with circumferentially distributed fixing holes 110. The fixing member enters the corresponding mounting column 109 from the fixing hole 110. The fixing member can use a general screw, which can realize the fastening function, and is not limited here. Through the scheme, when the anti-theft hand-tightening nut structure bolt is normally screwed (the lower shell 102 faces the product), the gap between the lower shell 102 and the product (such as the steel frame of the luggage rack) is not enough for the thief to loosen the fixing member by the ordinary one-way loosening method. Unless the thief can obtain the card and enter the locking state, the fixing member cannot be disassembled, that is, the upper shell 101 and the lower shell 102 cannot be disassembled.

[0034] In order to consider the smooth rotation between the nut body 201 and the shell 1 in the anti-theft state, and to avoid the shell 1 driving the nut body 201 to rotate, in an example, referring to Figure 1 the upper part of the nut body 201 is located within the second avoiding hole 103, the lower part of the nut body 201 extends from the third avoiding hole 104, and the lower part of the nut body 201 is gap-fitted with the third avoiding hole 104. By increasing the gap between the lower part of the nut body 201 and the third avoiding hole 104.

[0035] In the embodiment, it is necessary to ensure that the locking disc 202 rotates along the axis of the shell 1. In an example, referring to Figure 1 and Figure 2 the upper end face of the lower shell 102 is provided with a coaxial second annular track 111, and the lower end face of the locking disc 202 is provided with a convex ring 205 for entering the second annular track 111. The coaxial limiting is realized through the cooperation between the second annular track 111 and the convex ring 205.

[0036] In a preferred scheme, referring toFigure 1 The plurality of locking grooves 204 are circumferentially distributed on the upper end surface edge of the locking disc 202, and there is no overlapping interference between adjacent locking grooves 204. The present scheme can enable the user to quickly align any one of the locking grooves 204 with the passage 4, and then the locking disc 202 can be rotated to the position shown in FIG. 4, so that the locking disc 202 is locked on the first annular track 203, and the sliding table 302 is locked in the position shown in FIG. 4. The present scheme can enable the user to quickly align any one of the locking grooves 204 with the passage 4, and then the locking disc 202 can be rotated to the position shown in FIG. 4, so that the locking disc 202 is locked on the first annular track 203, and the sliding table 302 is locked in the position shown in FIG. 4. Figure 1 As can be seen, the four locking grooves 204 are circumferentially distributed on the upper end surface edge of the locking disc 202. Since the four locking grooves 204 all intrude into the range of the first annular track 203, the first annular track 203 is not a complete annular passage as seen from the figure. In fact, the locking grooves 204 do not damage the function of the first annular track 203, and the first annular track 203 can still allow the sliding table 302 to rotate freely inside.

[0037] Since the locking member 3 cannot rotate relative to the housing 1, and the sliding table 302 is always aligned with the passage 4, in the present embodiment, the sliding table 302 is provided as only one set.

[0038] 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 essence of the present application should be covered within the protection scope of the present application.

Claims

1. A theft-proof hand-tightened nut structure characterized by comprising: The hollow shell, the nut assembly and the locking piece are coaxially arranged inside the shell, the side of the shell is provided with a flat channel, the nut assembly includes a nut body with two ends exposed from the top and bottom of the shell respectively, and a locking disc coaxially fixed on the side of the nut body, the upper end surface of the locking disc is provided with a coaxial first annular track, the upper end surface edge of the locking disc is further provided with a locking groove intruding into the range of the first annular track, the shape of the locking groove matches the shape of the locking card, the middle part of the locking piece is provided with a first avoiding hole for avoiding the nut body, the lower end of the locking piece is provided with a group of mirror-symmetrical sliding tables, the sliding tables are matched and arranged in the first annular track and fixed towards the channel, the upper end of the locking piece is connected with the inner top surface of the shell, the locking card is slid and inserted into the locking groove through the channel, and the side surface of the locking card is in contact with the side surface of the two sliding tables; the opposite sides of the two sliding tables are provided with longitudinal limiters, the lower end surface of the limiter is in contact with the upper end surface of the locking card; there is only one group of sliding tables.

2. The theft-proof hand nut structure according to claim 1, wherein The shell includes an upper shell and a lower shell matched and buckled with each other, the center of the upper shell and the lower shell is respectively provided with a second avoiding hole and a third avoiding hole for exposing the end surface of the nut body.

3. The theft-proof hand nut structure according to claim 2, wherein It also includes a hand pushing piece and a connecting column fixed at the bottom end of the hand pushing piece, the upper end surface of the upper shell is provided with a mounting hole on the side away from the channel, the width of the mounting hole is greater than the width of the connecting column, the connecting column enters the shell from the mounting hole and is fixedly connected with the locking piece, wherein the top of the upper shell is provided with a straight guide rail parallel to the insertion direction of the locking card, and the two side surfaces of the locking piece are slidably arranged along the straight guide rail.

4. The theft-proof hand nut structure according to claim 3, wherein The side of the locking piece close to the channel is provided with an elastic piece.

5. The theft-proof hand nut structure according to claim 2, wherein The inner side of the upper shell is provided with a vertical mounting column, the surface of the lower shell is provided with a plurality of circumferentially distributed fixing holes, and a fixing piece enters the corresponding mounting column from the fixing hole.

6. The theft-preventing hand nut structure according to claim 2, wherein The upper part of the nut body is located within the second avoiding hole, the lower part of the nut body extends from the third avoiding hole, and the lower part of the nut body is gap-fitted with the third avoiding hole.

7. The theft-proof hand nut structure according to claim 6, wherein The upper end surface of the lower shell is provided with a coaxial second annular track, and the lower end surface of the locking disc is provided with a convex ring for entering the second annular track.

8. The theft-proof hand nut structure according to claim 1, wherein A plurality of locking grooves are circumferentially distributed on the upper end surface edge of the locking disc, and there is no overlapping interference between adjacent locking grooves. The hollow shell, the nut assembly and the locking piece are coaxially arranged inside the shell, the side of the shell is provided with a flat channel, the nut assembly includes a nut body with two ends exposed from the top and bottom of the shell respectively, and a locking disc coaxially fixed on the side of the nut body, the upper end surface of the locking disc is provided with a coaxial first annular track, the upper end surface edge of the locking disc is further provided with a locking groove intruding into the range of the first annular track, the shape of the locking groove matches the shape of the locking card, the middle part of the locking piece is provided with a first avoiding hole for avoiding the nut body, the lower end of the locking piece is provided with a group of mirror-symmetrical sliding tables, the sliding tables are matched and arranged in the first annular track and fixed towards the channel, the upper end of the locking piece is connected with the inner top surface of the shell, the locking card is slid and inserted into the locking groove through the channel, and the side surface of the locking card is in contact with the side surface of the two sliding tables; the opposite sides of the two sliding tables are provided with longitudinal limiters, the lower end surface of the limiter is in contact with the upper end surface of the locking card; there is only one group of sliding tables.

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