CN218564139U

CN218564139U - Detachable locking device

Info

Publication number: CN218564139U
Application number: CN202222587958.8U
Authority: CN
Inventors: 王金辉; 梅镇; 高槐; 钟涛; 陈建军; 甄登平
Original assignee: Chongqing Machine Tool Group Co Ltd
Current assignee: Chongqing Machine Tool Group Co Ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-03-03
Anticipated expiration: 2032-09-28

Abstract

The utility model provides a detachable locking device, which comprises a bolt, a nut and a fastening part, wherein the bolt comprises a first end part and a first screw rod, the first screw rod is provided with an external thread, the first screw rod is internally provided with a threaded hole which is coaxial with the first screw rod, and the direction of the thread of the threaded hole is opposite to that of the external thread on the first screw rod; the nut is matched with the bolt; the fastening part comprises a second end part and a second screw rod, the second screw rod is provided with an external thread, the second screw rod is matched with the threaded hole so that the loosening directions of the nut and the fastening part are opposite, and one surface, facing the second screw rod, of the second end part is provided with an annular bulge so that the annular bulge is in close contact with the nut when the nut and the fastening part are in a locking state. The utility model discloses a fastening effect is better, and simple structure, convenient operation.

Description

Detachable locking device

Technical Field

The utility model relates to a mechanical locking technical field, concretely relates to can dismantle locking device.

Background

The locking bolt is widely applied to fastening in various fields, however, along with the lapse of service time, the locking bolt on a lot of equipment will become flexible after using for a period of time, even drop to influence the normal use of equipment, even cause the emergence of incident. So a plurality of devices for preventing loosening also appear, but the locking bolts on the market at present cannot be reused.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a detachable locking device, which comprises a bolt, a nut and a fastening part, wherein, the bolt comprises a first end part and a first screw rod, wherein, the first screw rod is provided with an external thread, the first screw rod is internally provided with a threaded hole which is coaxially arranged with the first screw rod, and the direction of the thread of the threaded hole is opposite to the direction of the external thread on the first screw rod; the nut is matched with the bolt; the fastening component comprises a second end part and a second screw rod, wherein the second screw rod is provided with an external thread, the second screw rod is matched with the threaded hole so that the loosening directions of the nut and the fastening component are opposite, and the surface, facing the second screw rod, of the second end part is provided with an annular bulge so that the annular bulge is in close contact with the nut when the nut and the fastening component are in a locking state.

Further, the fastening member is a limit bolt or a limit screw.

Further, the second end of the fastening member is in the shape of an outer hexagon or an inner hexagon.

Further, the first end of the bolt is hexagonal outside or hexagonal inside.

Further, the end surface of the nut facing the fastening member in use has a first spline distributed around an axial center line of the nut, the annular projection has a second spline distributed around an axial center line of the second screw, the first spline and the second spline are matched, and the first spline and the second spline are engaged when the nut and the fastening member are in a locked state.

The beneficial effects of the utility model reside in that:

the utility model discloses a set up the annular groove at fastening component's tip (promptly have correspondingly formed annular protruding, if), when the screw rod of bolt is all twisted to the nut, still can make the nut can contact easily with fastening component and cause the state of counterbalance to prevent not hard up and/or the drop of nut, and need not increase extra structure (for example, spring etc.) between nut and fastening component and cause the counterbalance state of nut and fastening component. Therefore, the utility model has simpler structure, more cost saving and more convenient operation; furthermore, the utility model discloses further the tooth's socket has been set up on the face that nut and fastening component contacted for nut and fastening component's combination is inseparabler, and fastening effect is better. The utility model provides a locking device simple structure, the installation and use of being convenient for, also convenient to detach, and repeatedly usable, economic environmental protection.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic sectional view of a detachable locking device according to an embodiment of the present invention;

fig. 2 is a schematic structural section of a bolt according to another embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a fastening component according to another embodiment of the present invention;

fig. 4 is a schematic view of a face having splines on a nut according to another embodiment of the present invention.

In the figure, the meaning of each symbol is as follows:

1. a bolt; 1-1, a first end; 1-2, a first screw; 1-3, a threaded hole; 2. a nut; 3. a fastening member; 3-1 second end portion; 3-2, a second screw; 3-3, a clamping part; 3-4, annular groove.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1-4, the detachable locking device comprises a bolt 1, a nut 2 and a fastening member 3, wherein the nut 2 is matched with the bolt 1. When using the detachable locking device, the bolt 1 may first be inserted and/or screwed into the device 4 to be fixed, then the nut 2 is tightened to the fastening position, and then the fastening part 3 is tightened so that the fastening part 3 abuts against the nut 2. The nut 2 and the fastening member 3 are restrained against loosening, thereby keeping the bolt fastened for a long time without loosening.

As shown in fig. 2, the bolt 1 comprises a first end 1-1 and a first screw 1-2, wherein the first screw 1-2 has an external thread (not shown in fig. 2), the first screw 1-2 has a threaded hole 1-3 coaxially disposed therein, and the thread of the threaded hole 1-3 has a direction opposite to that of the external thread of the first screw 1-2. It should be noted that the first end 1-1 of the bolt 1 shown in fig. 1 is hexagonal, which is only illustrative and not intended to limit the present invention. In other embodiments, the first end 1-1 of the bolt 1 may also be internal hexagonal or other suitable shape.

As shown in fig. 4, the fastening member 3 comprises a second end portion 3-1 and a second screw 3-2, wherein the second screw 3-2 has an external thread, and the second screw 3-2 is matched with the threaded hole 1-3 so that the loosening directions of the nut 2 and the fastening member 3 are opposite. The second end 3-1 faces an annular groove 3-4 of a face of the second screw 3-2, so that the rest part of the face forms an annular bulge. When the nut 2 and the fastening member 3 are in a locked state, the annular protrusion and the nut 2 are in close contact, and the annular protrusion and the nut 2 are integrated to form an abutting state. Since the nut 2 and the fastening member 3 are loosened in opposite directions, when in a locked state, the nut 2 and the fastening member 3 are not easily rotated, and therefore, loosening is not caused, and even the nut 2 is not removed, therefore, by providing the annular groove 3-4 (i.e., the annular protrusion is correspondingly formed, as shown in fig. 3) at the end portion (i.e., the second end portion 3-1) of the fastening member 3, when the nut 2 is fully screwed into the screw rod (i.e., the first screw rod 1-2) of the bolt 1, the nut 2 can still be easily contacted and abutted against the fastening member 3, so as to prevent loosening and/or removal of the nut 2, without adding an additional structure (e.g., a spring, etc.) between the nut 2 and the fastening member 3 to cause the abutted state of the nut 2 and the fastening member 3. Therefore, the utility model discloses a structure is simpler, and the cost is practiced thrift more, and it is also more convenient to operate.

It should be noted that the clamping portion of the end portion (i.e., the second end portion 3-1) of the fastening component 3 shown in fig. 1 and 3 is an inner hexagon, which is merely illustrative and not intended to limit the present invention. In some embodiments, the end of the fastening member 3 may also be hexagonal. In some embodiments, the end of the fastening member 3 may also include a snap-in portion with other shapes, and is not limited herein. The fastening member 3 may be a limit bolt or a limit screw.

In addition, the diameter of the second end portion 3-1 of the fastening member 3 may be larger than the diameter of the nut 2, may be equal to the diameter of the nut 2, or may be smaller than the diameter of the nut 2, which is not limited herein, and only needs to satisfy the condition that the annular protrusion of the second end portion 3-1 can abut against the nut 2. The size relationship between the diameter of the end of the bolt 1, i.e. the first end 1-1, and the diameter of the second end 3-1 of the nut 2 and/or the tightening part 3 is not limited.

In some embodiments, in order to make the connection between the nut 2 and the fastening member 3 tighter and to achieve a better fastening effect, it is also possible to provide splines (also referred to as "first splines") distributed around the axial center line of the nut 2 on one end surface of the nut 2 as shown in fig. 4. Correspondingly, a spline (also referred to as a "second spline") may be provided on a surface of the end portion (i.e., the second end portion 3-1) of the fastening member 3 facing the screw (i.e., the second screw 3-2) of the fastening member 3, the second spline being distributed around the axial center line of the second screw. It should be noted that fig. 4 only shows a schematic view of one side of the nut having the tooth grooves, and the shape and number of the tooth grooves are only schematic and are not intended to limit the present invention. The number of first and second tooth slots may be any, for example, 1-10, 11-20, 20-30, 30-40, 40-50, 50-60, or any value greater than 60. The first and second tooth grooves may have any shape, for example, a straight tooth groove or a skewed tooth groove.

This first tooth's socket and second tooth's socket phase-match, when the installation was used, the one side that has the tooth's socket with nut 2 was towards fastening component 3, when nut 2 and fastening component 3 were in locking state, fastening component 3's terminal surface not only was in the state of offseting with nut 2 to, fastening component 3's second tooth's socket also was in the interlock state with the first tooth's socket on the nut 2, formed a inseparabler whole, consequently, fastening effect is better.

When the disassembly is needed, only the fastening part 3 needs to be loosened firstly, and then the nut 2 needs to be loosened, so that the disassembly tool is simple and convenient to operate and convenient to repeat and practical. Therefore, the utility model provides a detachable locking device not only fastens effectually, simple structure, the operation of being convenient for moreover, and reuse, economic environmental protection.

It should be noted that fig. 1 to 4 are merely schematic and do not limit the structures of the corresponding components, and fig. 1 to 4 do not show the threads on the bolt 1, the nut 2, and the fastening member 3 (for example, the external thread of the bolt 1, the threads of the threaded hole 1-3, the internal thread of the nut 2, and the external thread of the fastening member 3), but do not show the absence of these threads, and are merely for convenience of drawing.

In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A detachable locking device comprises a bolt (1), a nut (2) and a fastening part (3), and is characterized in that,

the bolt (1) comprises a first end part (1-1) and a first screw rod (1-2), wherein the first screw rod (1-2) is provided with an external thread, the first screw rod (1-2) is internally provided with a threaded hole (1-3) which is coaxially arranged with the first screw rod, and the thread direction of the threaded hole (1-3) is opposite to the direction of the external thread on the first screw rod (1-2);

the nut (2) is matched with the bolt (1);

the fastening part (3) comprises a second end part (3-1) and a second screw (3-2), wherein the second screw (3-2) is provided with an external thread, the second screw (3-2) is matched with the threaded hole (1-3) so that the loosening directions of the nut (2) and the fastening part (3) are opposite, and the surface of the second end part (3-1) facing the second screw (3-2) is provided with an annular bulge so that the annular bulge is tightly contacted with the nut (2) when the nut (2) and the fastening part (3) are in a locking state.

2. A detachable locking device according to claim 1, characterised in that the fastening member (3) is a limit bolt or a limit screw.

3. A detachable locking device according to claim 1, characterised in that the second end (3-1) of the fastening member (3) is hexagonal externally or hexagonal internally.

4. A detachable locking device according to claim 1, characterised in that the first end (1-1) of the bolt (1) is hexagonal outside or hexagonal inside.

5. A releasable locking device according to any of claims 1-4, characterized in that the end surface of the nut (2) facing the tightening part (3) in use has a first toothing distributed around the axial centre line of the nut (2), and the annular protrusion has a second toothing distributed around the axial centre line of the second screw (3-2), said first and second toothings matching and engaging when the nut (2) and the tightening part (3) are in the locked state.