CN221257395U - Anti-theft hand-screwed nut structure - Google Patents

Abstract

The utility model discloses an anti-theft hand-screwed nut structure, wherein a flat channel is arranged on the side surface of a shell, a nut assembly comprises a nut body, two ends of the nut body are exposed from the top and the bottom of the shell respectively, and a locking disc coaxially fixed on the periphery of the nut body, a first coaxial annular track is arranged on the upper end surface of the locking disc, a locking groove which invades the range of the first annular track is also arranged on the edge of the upper end surface of the locking disc, the shape of the locking groove is matched with that of a locking card, a group of sliding tables which are in mirror symmetry are arranged at the lower end of a locking piece, the sliding tables are installed in the first annular track in a matched mode and are fixedly oriented to the channel, the upper end of the locking piece is connected with the inner top surface of the shell, the locking card is inserted into the locking groove in a sliding mode through the channel, and the side surfaces of the locking card are contacted with the side surfaces of the two sliding tables. The beneficial effects are that: the locking groove inside the shell is not easy to observe, and a user can also rotate the locking groove to a position which cannot be observed, so that the safety of the anti-theft nut is greatly improved.

Description

Anti-theft hand-screwed nut structure

Technical Field

The utility model relates to the field of anti-theft fasteners, in particular to an anti-theft hand-screwed nut structure.

Background

Considering the convenience of loading and unloading, most of vehicle-mounted outdoor products (such as roof racks) can be mounted on a vehicle in a mode of tightening by hand bolts and hand nuts. However, the hand-screwed bolt and the hand-screwed nut have no anti-theft function, and the product is exposed outdoors and is easy to be taken away by a person directly loosening the nut. In order to realize the anti-theft function of the fastener, various anti-theft fasteners are shown in the prior art, such as an anti-theft bolt disclosed in a Chinese patent No. 202144824U, which consists of a screw, a nut lock pin and a key, wherein a lock groove is vertically formed in the outer wall of the screw, a through lock hole is formed in the side wall of the nut, the nut is screwed on the screw, the lock hole corresponds to the lock groove, a key hole is formed in the end part of the nut lock pin along the longitudinal direction, the nut lock pin is screwed in the lock hole by using the key, the inner end of the nut lock pin is positioned in the lock groove of the screw, the key is inserted into the key hole of the nut lock pin to rotate, the nut lock pin can be screwed in or screwed out, the shape of the key corresponds to the shape of the key hole, the key can be reused, and the cost is saved.

However, the keyhole of the anti-theft bolt is exposed to the outside, so that other people can easily copy the corresponding key according to the shape of the keyhole in a short time, and the anti-theft performance is very low.

Disclosure of utility model

The utility model provides an anti-theft hand-screwed nut structure aiming at solving the problem that the safety of the key hole of the existing anti-theft bolt is low when the key hole is exposed outside.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

The utility model provides an theftproof hand is twisted nut structure, includes hollow casing, and coaxial mounting is in nut subassembly and locking piece inside the casing, wherein, the side of casing is provided with the passageway of platykurtic, nut subassembly includes both ends follow respectively the top and the bottom of casing expose the nut body, and coaxial fixing the locking dish of nut body week side, the up end of locking dish is provided with coaxial first annular rail, the up end edge of locking dish still is provided with the invasion locking recess in the first annular rail scope, the shape of locking recess matches with the shape of locking card, the middle part of locking piece is provided with and is used for dodging the first hole of dodging of nut body, the lower extreme of locking piece is provided with a set of mirror symmetry's slip table, the slip table is matchedly installed in the first annular rail and is fixed towards the passageway, the upper end of locking piece with the interior top surface of casing is connected, the locking is passed through the passageway slip and is inserted locking recess, and the shape of locking card contacts with both sides of locking piece.

In some embodiments, two opposite sides of the sliding table are provided with longitudinal limiting pieces, and the lower end faces of the longitudinal limiting pieces are in contact with the upper end faces of the locking cards.

In some embodiments, the shell comprises an upper shell and a lower shell which are buckled in a matching way, and a second avoidance hole and a third avoidance hole for exposing the end face of the nut body are respectively arranged in the centers of the upper shell and the lower shell.

In some embodiments, the locking device further comprises a hand pushing piece and a connecting column fixed at the bottom end of the hand pushing piece, wherein a mounting hole is formed in one side, far away from the channel, of the upper end face of the upper shell, the width of the mounting hole is larger than that of the connecting column, the connecting column enters the shell from the mounting hole and is fixedly connected with the locking piece, a linear guide rail parallel to the insertion direction of the locking card is arranged at the top of the upper shell, and two side faces of the locking piece are slidably mounted along the linear guide rail.

In some embodiments, the locking member is provided with a resilient member on a side of the channel.

In some embodiments, the inner side of the upper housing is provided with vertical mounting posts, the surface of the lower housing is provided with circumferentially distributed fixing holes, and fixing pieces enter the corresponding mounting posts from the fixing holes.

In some embodiments, the upper portion of the nut body is located within the second relief hole, the lower portion of the nut body extends from the third relief hole, and the lower portion of the nut body is in clearance fit with the third relief hole.

In some embodiments, the upper end surface of the lower housing is provided with a coaxial second annular track, and the lower end surface of the locking disk is provided with a convex ring for entering the second annular track.

In some embodiments, the plurality of locking grooves are circumferentially distributed on the edge of the upper end face of the locking disc, and no overlapping interference exists between the adjacent locking grooves.

In some embodiments, there is and only one set of said slips.

The beneficial effects of the utility model are as follows: through set up rotatable or locking nut body in a hollow casing, then set up the insertion port of a platykurtic passageway as locking card in the side of casing, because the passageway is platykurtic, so be difficult to observe the inside locking recess of casing to can rotate between passageway and the locking recess, consequently the user can also rotate the locking recess to unobservable position, greatly improved the security of anti-theft nut.

Drawings

FIG. 1 is an exploded view of an anti-theft hand-tightened nut structure disclosed in an embodiment of the present utility model;

FIG. 2 is an exploded view of the anti-theft hand-screwed nut structure disclosed in the embodiment of the present utility model;

FIG. 3 is a schematic view of an anti-theft hand-screwed nut structure according to an embodiment of the present utility model in a locked state with a housing hidden;

FIG. 4 is a schematic view of an anti-theft hand-screwed nut structure according to an embodiment of the present utility model in a locked state;

FIG. 5 is a schematic view of an anti-theft hand-screwed nut structure according to an embodiment of the present utility model in a slip state;

Wherein: 1-shell, 2-nut assembly, 3-locking piece, 4-passageway, 5-locking card, 101-upper shell, 102-lower shell, 103-second dodge hole, 104-third dodge hole, 105-hand propelled piece, 106-spliced pole, 107-mounting hole, 108-linear guideway, 109-mounting pole, 110-fixed orifices, 111-second annular track, 201-nut body, 202-locking dish, 203-first annular track, 204-locking recess, 205-bulge loop, 301-first dodge hole, 302-slip table, 303-longitudinal limiting piece, 304-elastic component.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and the detailed description below, in order to make the objects, technical solutions and advantages of the present utility model more clear and distinct. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present utility model are shown in the accompanying drawings.

The present embodiment proposes an anti-theft hand-screwed nut structure, as shown in fig. 1, including a hollow shell 1, and a nut assembly 2 and a locking piece 3 coaxially installed inside the shell 1, wherein, the side surface of the shell 1 is provided with a flat channel 4, the nut assembly 2 includes a nut body 201 with two ends respectively exposed from the top and bottom of the shell 1, and a locking disc 202 coaxially fixed at the periphery of the nut body 201, the upper end surface of the locking disc 202 is provided with a coaxial first annular track 203, the upper end surface edge of the locking disc 202 is also provided with a locking groove 204 penetrating into the range of the first annular track 203, the shape of the locking groove 204 matches with the shape of the locking card 5, the middle part of the locking piece 3 is provided with a first avoiding hole 301 for avoiding the nut body 201, the lower end of the locking piece 3 is provided with a set of sliding tables 302 in mirror symmetry, the sliding tables 302 are installed in the first annular track 203 in a matching manner and are fixed towards the channel 4, the upper end of the locking piece 3 is connected with the inner top surface of the shell 1, the locking card 5 is slidably inserted into the locking groove 204 through the channel 4, and the side surfaces of the locking card 5 are contacted with the two sliding tables 302.

In this embodiment, by providing the rotatable or lockable nut body 201 in a hollow housing 1 and then providing a flat channel 4 on the side of the housing 1 as the insertion port for the locking card 5, the locking groove 204 inside the housing 1 is not easily observed because the channel 4 is flat, and the locking groove 204 is rotatable between the channel 4 and the locking groove 204, so that the user can also rotate the locking groove 204 to a position where it is not observable, greatly improving the security of the anti-theft nut.

The following describes a locked state and a slip state of the antitheft hand-screwed nut structure.

Locking state: for normal screw tasks (including installation and removal), first, the user needs to first screw the housing 1, align the channel 4 with the locking groove 204 (the slide 302 and the channel 4 are in a fixed relationship, the slide 302 is always aligned with the channel 4), and then slidingly insert the locking card 5 from the channel 4 into the locking groove 204, and the mating relationship of the locking card 5 and the channel 4 in the locked state is shown in fig. 3 and 4. At this time, the head of the locking card 5 abuts against the side surfaces of the locking groove 204, and the two side surfaces of the locking card 5 abut against the side surfaces of the two sliding tables 302 in a matching manner to form a locking state, so that after the user continues to screw the housing 1, the torque received by the housing 1 is firstly transferred to the locking member 3 in connection with the housing, and because the sliding table 302 at the lower end of the locking member 3 contacts with the locking card 5, the torque is further transferred to the locking card 5, the torque received by the locking card 5 is transferred to the whole locking disc 202 through the locking groove 204, and finally the torque received by the locking disc 202 is firstly transferred to the nut body 201 in connection with the locking member. That is, the locking card 5 serves as an intermediate member for transmitting torque in this scheme, when the user inserts the locking card 5 into the locking groove 204, from the external appearance, the nut body 201 and the housing 1 are temporarily fixed as a whole by the locking card 5, the user can simultaneously control the nut body 201 to rotate by screwing the housing 1, and at this time, the anti-theft hand-screwed nut structure is not different from a normal nut, can be smoothly screwed with a common bolt, and can also be detached from the bolt. In practice, the torque applied to the housing 1 needs to pass through the locking member 3, the sliding table 302, the locking card 5, the locking groove 204 and the locking disc 202 in order, and is finally transmitted to the nut body 201.

Slip state: for the anti-theft task after the screwing, after the locking card 5 is drawn out from the locking groove 204, the matching relationship between the locking card 5 and the channel 4 in the slipping state is shown in fig. 5, the connection relationship between the locking disc 202 and the locking piece 3 is immediately lost, when the user screws the shell 1, the torque borne by the shell 1 can be transmitted to the locking piece 3, but as the sliding table 302 at the lower end of the locking piece 3 loses the limit of the locking card 5, the sliding table 302 can only infinitely rotate along the first annular track 203, and from the external expression, the nut body 201 and the shell 1 show rotary slipping, and the user screws the shell 1 and cannot simultaneously control the nut body 201 to rotate, so that the anti-theft hand-screwed nut structure cannot be detached from the bolt. It should be noted that, since the nut body 201 and the housing 1 exhibit rotational slip, before entering the locked state, the user needs to screw the housing 1 (at this time, the nut body 201 is already fixed to a certain bolt, and the locking groove 204 and the locking disc 202 should be regarded as a fixing mechanism), by virtue of the sliding rotational relationship between the slide table 302 and the first annular rail 203, until the passage 4 is aligned with the locking groove 204, in preparation for sliding the locking card 5 from the passage 4 into the locking groove 204.

In the above scheme, the sliding table 302 and the locking groove 204 only limit the side surface of the locking card 5, specifically, the thickness of the locking card 5 is slightly greater than the depth of the locking groove 204, so that after 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, the locking groove 204 limits the locking card 5 stably in a lateral direction, 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 contacts with the sliding table 302, and the sliding table 302 also limits the locking card 5 stably in a lateral direction. In order to further fix the locking card 5, it is prevented from falling in the process of following the rotation of the housing 1, and with continued reference to fig. 1, opposite sides of the two sliding tables 302 are provided with longitudinal limiting members 303, and a lower end surface of the longitudinal limiting members 303 contacts with an upper end surface of the locking card 5 to provide longitudinal limiting for the locking card 5.

In the present embodiment, since a plurality of components need to be installed inside the housing 1, the housing 1 should be of a detachable design in view of production efficiency. In an example, with continued reference to fig. 1, the housing 1 includes an upper housing 101 and a lower housing 102 that are fastened in a matching manner, the centers of the upper housing 101 and the lower housing 102 are respectively provided with a second avoiding hole 103 and a third avoiding hole 104 for exposing the end faces of the nut body 201, and obviously, through the fastening design of the upper housing 101 and the lower housing 102, a plurality of components can be produced and assembled in advance, and finally, the components are installed in the upper housing 101 and the lower housing 102, the second avoiding hole 103 and the third avoiding hole 104 can be aligned with two end faces of the nut body 201, and the anti-theft hand-screwed nut structure in a locking state is not different from a common nut and is designed to penetrate up and down. As can be seen from fig. 2, the upper casing 101 is in a cover shape, and the lower casing 102 is in a corresponding circular shape, alternatively, the upper casing 101 and the lower casing 102 may be symmetrically shaped, so that a fastening function may be achieved.

In this embodiment, the shape of the locking card 5 may be completely identical to 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 into the housing 1, and the user cannot withdraw the locking card 5 by hand to release the locked state, in addition, the tail of the locking card 5 may be extended, and when the locking card 5 is inserted into the locking groove 204, the tail of the locking card 5 is still outside the housing 1, and the user can withdraw the locking card 5 by hand to release the locked state. However, although the latter allows a quick extraction by extending the tail of the locking card 5, the overall length of the locking card 5 is not necessarily too large, which would otherwise affect the portability of the locking card 5 (corresponding to a key), and more importantly, the exposure of the locking card 5 to the outside of the housing 1 is also susceptible to interference with other nuts, or with the product itself, particularly when the two nut mounting locations are very close. This embodiment provides one of the alternative solutions for the quick removal of the locking card 5, illustrated by the following example. Specifically, referring to fig. 1 and 2, further include a pushing member 105, and a connecting column 106 fixed at the bottom end of the pushing member 105, one side of the upper end surface of the upper housing 101 away from 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 housing 1 from the mounting hole 107 and is fixedly connected with the locking member 3, wherein the top of the upper housing 101 is provided with a linear guide rail 108 parallel to the insertion direction of the locking card 5, two side surfaces of the locking member 3 are slidably mounted along the linear guide rail 108, 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, and a user pushes the pushing member 105 to the channel 4 indirectly pushes the connecting column 106, the locking member 3 and the locking disc 202 as a whole to the channel 4, which finally represents pushing the locking card 5 out of the channel 4 by a small distance, and the user can pull the locking card 5 by hand, thereby releasing the locking state.

It should be noted that, in the above-mentioned scheme, in order to realize the linear limit of the locking member 3, a scheme of "sliding the two side surfaces of the locking member 3 along the linear guide rail 108" is adopted, when the locking card 5 is pushed out of the channel 4, the second avoidance hole 103 and the third avoidance hole 104 are not aligned with the two end surfaces of the nut body 201, that is, the nut body 201 cannot be normally screwed with the bolt, and at this time, the hand pushing member 105 needs to be manually reset, that is, pulled in a direction away from the channel 4. In view of the above-mentioned shortcomings, in a more preferable solution, an elastic element 304 is disposed on one side of the locking element 3 near the channel 4, and with continued reference to fig. 1, specifically, two ends of the elastic element 304 respectively abut against one side of the locking element 3 near the channel 4, and the inner wall of the upper housing 101, when the user pushes the hand pushing element 105 toward the channel 4, the elastic element 304 immediately starts to store energy, and when the user releases the hand, the elastic element 304 releases elastic potential energy to push the whole of the locking element 3, the hand pushing element 105, the connecting column 106 and the locking disc 202 away from the channel 4 until the side surface of the locking element 3 abuts against the inner wall of the upper housing 101, which finally shows that the second avoidance hole 103 and the third avoidance hole 104 automatically align with two end surfaces of the nut body 201. Optionally, a fixing column may be disposed on a side of the locking member 3 near the channel 4, and a reset compression spring may be disposed on the fixing column.

In the above-mentioned scheme, the upper casing 101 and the lower casing 102 are designed to be matched and fastened, in order to improve the anti-theft performance, referring to fig. 1 and 2, the inner side of the upper casing 101 is provided with vertical mounting posts 109, the surface of the lower casing 102 is provided with circumferentially distributed fixing holes 110, and fixing pieces enter the corresponding mounting posts 109 from the fixing holes 110. Through this scheme, after this theftproof hand is twisted nut structure bolt and is carried out normal spiro union (lower shell 102 orientation product), the clearance between lower shell 102 and the product (such as the steelframe of luggage rack) is insufficient for letting the thief adopt ordinary one-way unscrewing mode to loosen the mounting, unless the thief can acquire the card and get into the method of locking state, can't dismantle this mounting, promptly can't dismantle upper shell 101 and lower shell 102.

Considering that a smoother rotation is required between the nut body 201 and the housing 1 in the anti-theft state, the housing 1 is prevented from driving the nut body 201 to rotate, in an example, with continued reference to fig. 1, an upper portion of the nut body 201 is located inside the second avoidance hole 103, a lower portion of the nut body 201 extends out of the third avoidance hole 104, and the lower portion of the nut body 201 is in clearance fit with the third avoidance hole 104, so that a clearance between the lower portion of the nut body 201 and the third avoidance hole 104 is increased.

In this embodiment, it is required to ensure that the locking disc 202 rotates along the axis of the housing 1, and in an example, referring to fig. 1 and 2, the upper end surface of the lower housing 102 is provided with a coaxial second annular track 111, the lower end surface of the locking disc 202 is provided with a convex ring 205 for entering the second annular track 111, and coaxial limitation is achieved through cooperation between the second annular track 111 and the convex ring 205.

In a preferred solution, with continued reference to fig. 1, a plurality of locking grooves 204 are circumferentially distributed on the edge of the upper end face of the locking disc 202, and no overlapping interference exists between adjacent locking grooves 204, and in this solution, by providing a plurality of locking grooves 204, a user can quickly align any one locking groove 204 with the channel 4, as can be seen in fig. 1, four locking grooves 204 are circumferentially distributed on the edge of the upper end face of the locking disc 202, and as all four locking grooves 204 invade the range of the first annular track 203, the first annular track 203 is not a complete annular channel as viewed in the figure, and in fact, the locking grooves 204 do not destroy the function of the first annular track 203, and the first annular track 203 can still allow the sliding table 302 to rotate randomly inside.

Considering that the locking member 3 cannot rotate relative to the housing 1 and that the slide table 302 is always aligned with the passage 4, in this embodiment the slide table 302 is provided with and only one set.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the essence of the present utility model are intended to be included within the scope of the present utility model.

Claims (10)

1. The utility model provides a nut structure is twisted to theftproof hand, its characterized in that includes hollow casing, and coaxial mounting is in nut subassembly and locking piece inside the casing, wherein, the side of casing is provided with the passageway of platykurtic, nut subassembly includes both ends follow respectively the top of casing and bottom are exposed, and coaxial fixing is in the locking dish of nut body week side, the up end of locking dish is provided with coaxial first annular track, the up end edge of locking dish still is provided with the invasion locking recess in the first annular track scope, the shape of locking recess matches with the shape of locking card, the middle part of locking piece is provided with and is used for dodging the first hole of dodging of nut body, the lower extreme of locking piece is provided with a set of mirror symmetry's slip table, the slip table matches and installs in the first annular track and fix towards the passageway, the upper end of locking piece with the internal connection of casing, the locking top surface passes through the passageway slides and inserts locking card recess, and the side of locking card contacts with two slip tables.

2. The antitheft hand-screwed nut structure according to claim 1, wherein the opposite sides of both the slide tables are provided with longitudinal stoppers, and the lower end faces of the longitudinal stoppers are in contact with the upper end faces of the locking cards.

3. The antitheft hand-screwed nut structure of claim 1, wherein the housing comprises an upper housing and a lower housing which are mutually matched and buckled, and a second avoidance hole and a third avoidance hole for exposing the end face of the nut body are respectively arranged in the center of the upper housing and the center of the lower housing.

4. The antitheft hand-screwed nut structure according to claim 3, further comprising a hand pushing member, and a connecting column fixed at the bottom end of the hand pushing member, wherein a mounting hole is provided at a side of the upper end surface of the upper housing away from the passage, the width of the mounting hole is larger than that of the connecting column, the connecting column enters the housing from the mounting hole and is fixedly connected with the locking member, wherein a linear guide rail parallel to the insertion direction of the locking card is provided at the top of the upper housing, and both side surfaces of the locking member are slidably mounted along the linear guide rail.

5. The antitheft hand-screwed nut structure of claim 4, wherein a side of said locking member adjacent to said passage is provided with an elastic member.

6. The antitheft hand-screwed nut structure of claim 3 wherein the inner side of said upper housing is provided with vertical mounting posts, and said lower housing surface is provided with circumferentially distributed fixing holes from which fasteners enter corresponding said mounting posts.

7. The antitheft hand-screwed nut structure of claim 3 wherein an upper portion of said nut body is located within said second relief aperture, a lower portion of said nut body extends from said third relief aperture, and wherein said lower portion of said nut body is in clearance fit with said third relief aperture.

8. The antitheft hand-screwed nut structure of claim 7 wherein the upper end face of said lower housing is provided with a coaxial second annular track, and the lower end face of said locking disk is provided with a collar for entering said second annular track.

9. The antitheft hand-screwed nut structure of claim 1, wherein a plurality of the locking grooves are circumferentially distributed on the edge of the upper end face of the locking disk, and there is no overlapping interference between adjacent locking grooves.

10. The antitheft hand-screwed nut structure of claim 1 wherein said slip has and has only one set.