CN214888281U - Anti-loosening combined screw - Google Patents

Abstract

A combined anti-loosening screw comprises a screw rod, a main nut and an auxiliary nut; the outer surface of the screw is provided with a first thread; the main nut is arranged on the screw rod; the main nut comprises a force application body and a column body; the outer surface of the rod body is provided with a second thread; main holes are communicated along the axis direction of the rod body and the axis direction of the main body; the main hole is provided with a third thread; the thread turning direction of the first thread is the same as the thread turning direction of the third thread; the first thread and the third thread are mutually matched; the auxiliary nut is arranged on the rod body; an auxiliary hole penetrates through the auxiliary nut along the axis direction; the auxiliary hole is provided with a fourth thread; the fourth thread is mutually matched with the second thread. The utility model provides an anti-loosening combination screw according to above-mentioned content, through setting up the screw thread of positive and negative rotation direction, make and treat that clamping piece locking is firm, is difficult for droing.

Description

Anti-loosening combined screw

Technical Field

The utility model relates to a screw technical field especially relates to an anti-loosening combination screw.

Background

At present, the connection between the components or the fastening between the equipment parts is usually accomplished by screws. Due to the complexity and the particularity of the use environment, the locking parts such as screw caps and nuts can loosen or fall off after a long time, so that the precision of high-precision equipment is reduced, the equipment is damaged, and even accidents are caused. Most of the existing common anti-skid screws adopt the friction surfaces arranged on the side surfaces of the screw caps to increase friction with fixed objects so as to prevent the screws from loosening or falling off, but the effect is not good generally, certain destructiveness and potential safety hazards exist, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti-loosening combination screw through setting up the screw thread of positive and negative rotation direction, makes and treats that clamping piece locking is firm, is difficult for droing.

To achieve the purpose, the utility model adopts the following technical proposal:

a combined anti-loosening screw comprises a screw rod, a main nut and an auxiliary nut;

the outer surface of the screw is provided with a first thread;

the main nut is arranged on the screw rod;

the main nut comprises a force application body and a cylinder;

the column body is fixed on the end surface of the force application body;

the outer surface of the column body is provided with a second thread;

the thread direction of the second thread is opposite to the thread direction of the first thread;

main holes are arranged along the axial direction of the column body and the axial direction of the force applying body in a penetrating way;

the main hole is provided with a third thread;

the thread turning direction of the first thread is the same as the thread turning direction of the third thread;

the first thread and the third thread are mutually matched;

the auxiliary nut is arranged on the column body;

an auxiliary hole penetrates through the auxiliary nut along the axis direction of the auxiliary nut;

the auxiliary hole is provided with a fourth thread;

the thread turning direction of the fourth thread is the same as the thread turning direction of the second thread;

the fourth thread is interfitted with the second thread.

In some embodiments, a spring washer is also included;

the spring washer is arranged between the main nut and the auxiliary nut;

the end face of the auxiliary nut is provided with second anti-skid grains;

the end face of the force application body connected with the column body is provided with the third anti-skid grains.

Preferably, the height of the cylinder is smaller than the height of the secondary nut.

Further, the screw rod structure further comprises a screw head, and the screw head is fixed on the end face of the screw rod.

Further, the screw head comprises a tightening body and a clamping body;

the clamping body is fixed on the end face of the tightening body;

the cross-sectional area of the clamping body is larger than that of the tightening body, and the clamping body is used for being attached to a piece to be clamped;

the cross section of the tightening body is polygonal.

Specifically, the end face of the clamping body is provided with a first anti-skid thread.

Further, the radial minimum length of the force application body is larger than the radial maximum length of the secondary hole.

Preferably, the radially largest length of the secondary orifice is 2/3 the radially smallest length of the force applying body.

In some embodiments, the cross-sectional area of the secondary nut is greater than the cross-sectional area of the force applicator.

In some embodiments, a gasket is further included;

the gasket penetrates into the screw rod, and the gasket is located between the clamping body and the auxiliary nut.

Compared with the prior art, one of the technical schemes has the following beneficial effects:

through set up on the main nut and revolve to opposite screw thread, install with vice nut and screw rod respectively, vice nut no matter receives the rotatory power of any direction and acts on together with the screw rod and treats the clamping piece and produce the effect that increases clamping strength to realize the anti-loosening effect, make to be tightly locked by the clamping piece, be difficult for droing.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

fig. 2 is a schematic structural diagram of a screw head according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a main nut in a top view according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a main nut according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a secondary nut according to an embodiment of the present invention;

FIG. 6 is a schematic view of the assembly of the screw and the main nut according to one embodiment of the present invention;

fig. 7 is a schematic structural view illustrating the assembly of the secondary nut and the primary nut according to one embodiment of the present invention;

fig. 8 is a schematic structural diagram of a gasket according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first anti-skid thread according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a self-tapping member for fastening according to an embodiment of the present invention;

wherein: the screw head 11, the tightening body 111, the clamping body 112, the protection part 1121, the screw 12, the first thread 121, the main nut 2, the main body 21, the rod body 22, the second thread 221, the main hole 23, the third thread 231, the auxiliary nut 3, the auxiliary hole 31, the fourth thread 311, the clamping area 4, the gasket 5, the elastic sheet 6, the first blocking end 61, the second blocking end 62, the second anti-skid thread 7 and the third anti-skid thread 8.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner", "outer end", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on 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 present invention. Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In one embodiment of the present invention, as shown in fig. 1-10, a combination screw for preventing loosening comprises a screw rod 12, a main nut 2 and an auxiliary nut 3;

the outer surface of the screw 12 is provided with a first thread 121;

the main nut 2 is arranged on the screw 12;

the main nut 2 comprises a force application body 21 and a column 22;

the column 22 is fixed on the end face of the force applying body 21;

the outer surface of the cylinder 22 is provided with a second thread 221;

the thread direction of the second thread 221 is opposite to the thread direction of the first thread 121;

main holes 23 are penetrated along the axial direction of the column 22 and the axial direction of the force applying body 21;

the main hole 23 is provided with a third thread 231;

the thread direction of the first thread 121 is the same as the thread direction of the third thread 231;

said first thread 121 and said third thread 231 cooperate with each other;

the auxiliary nut 3 is arranged on the column body 22;

an auxiliary hole 31 penetrates through the auxiliary nut 3 along the axis direction;

the auxiliary hole 31 is provided with a fourth thread 311;

the thread direction of the fourth thread 311 is the same as the thread direction of the second thread 221;

the fourth thread 311 is engaged with the second thread 221.

In this embodiment, the force applying body 21 and the column 22 are coaxially connected, when a member to be clamped needs to be clamped, the auxiliary nut 3 needs to be mounted on the main nut 2 to form a combined nut, and then a limiting member is fixed to one end of the screw 12 or a tightening nut is mounted, at this time, the auxiliary nut 3 and the limiting member/tightening nut are formed with the clamping area 4, the clamping area 4 is used for placing the member to be clamped, because the column 22 is fixed to the bottom surface of the force applying body 21, when mounting, specifically, as shown in fig. 1, the auxiliary nut 3 is rotated clockwise from bottom to top to the force applying body 21 and embedded into the column 22 of the main nut 2, so that the fourth thread 311 of the auxiliary hole 31 and the second thread 221 of the column 22 are mounted in a mutually matched manner until the auxiliary nut 3 is attached to the bottom surface of the force applying body 21, at this time, the auxiliary nut 3 and the main nut 2 are already mounted as a whole, then, the main nut 2 is installed on the screw 12, so that during installation, specifically, the main nut 2 is inserted into the screw 12 by rotating clockwise from top to bottom, so that the third thread 231 of the main hole 23 and the first thread 121 of the screw 12 are installed in a matching manner until the secondary nut 3 fits on the member to be clamped, that is, primary clamping is completed, but at this time, there is still a twisting margin, in order to further enhance the clamping effect, the secondary nut 3 is rotated counterclockwise, the main nut 2 is rotated clockwise, the main nut 2 moves the secondary nut thread 3 away from the main nut 2 toward the member to be clamped under the action of the second thread 221 and the fourth thread 311, further clamps the member to be clamped, secondary clamping is completed, and the main nut 2 continues to approach the member to be clamped along the screw 12 under the action of the first thread 121 and the third thread 231, thereby make vice nut 3 further press from both sides tight waiting for the clamping piece once more, accomplish the cubic and press from both sides tightly, make and wait that the clamping piece is more firm, difficult pine takes off, improves and presss from both sides tight quality, thereby reaches to improve the effect of locking performance of taking off of locking combination screw.

When the anti-loosening combined screw needs to be loosened, a rotating acting force in the loosening direction (namely, anticlockwise rotation) is directly applied to the main nut 2 so as to achieve the purpose of loosening the anti-loosening combined screw; or, the main nut 2 is kept not to rotate, the rotating acting force in the screwing direction (namely clockwise rotation) is applied to the auxiliary nut 3, so that the clamping strength of the combined nut on the clamping piece is reduced, then the rotating acting force in the loosening direction is applied to the main nut 2 until the purpose of loosening the anti-loosening combined screw is achieved, and the operation of loosening the anti-loosening combined screw is completed.

Preferably, a combination of the main nut 2 and the sub nut 3 may be installed at both ends of the screw 12, respectively, as an embodiment.

As shown in fig. 1, further comprises a spring washer 6;

the spring washer 6 is arranged between the main nut 2 and the auxiliary nut 3;

the end surface of the auxiliary nut 3 is provided with second anti-skid threads 7;

the end face of the force application body 21 connected with the column 22 is provided with the third anti-skid grains 8.

In this embodiment, the spring washer 6 is first threaded into the cylinder 22 of the main nut 2, and the second screw thread 221 of the main nut 2 is rotatably inserted in correspondence with the fourth screw thread 311 of the sub nut 3, and the main nut 2 and the auxiliary nut 3 are rotated to completely press the spring washer 6, the second anti-skid grains 7 and the third anti-skid grains 8 are both provided with notches on the spring washer 6, i.e. the spring washer 6 is an unclosed ring, the gap breaking the spring washer 6 with a first blocking end 61 and a second blocking end 62, when the auxiliary nut 3 is completely screwed into the cylinder 22 of the main nut 2, the first blocking end 61 abuts against the second anti-skid thread 7, the second blocking end 62 abuts against the third anti-skid pattern 8, and the cross sections of the second anti-skid pattern 7 and the third anti-skid pattern 8 are sawtooth-shaped with directions, so that two different friction coefficients with different rotation directions are formed; when the acting force in the screwing direction of the auxiliary nut 3 rotates, the auxiliary nut 3 is limited by the end face of the force applying body 21, and the spring washer 6 and the second anti-slip threads 7 and the third anti-slip threads 8 respectively form multiple effects of larger friction coefficient, so that the acting force can be transmitted to the main nut 2, the main nut 2 rotates along with the main nut, and the combined nut moves towards the direction of the clamped piece, so that the effect of increasing the clamping strength of the combined nut is formed; when the auxiliary nut 3 receives the effort of the pine direction to rotate, the spring washer 6 respectively with the second anti-skidding line 7 with the less coefficient of friction that third anti-skidding line 8 formed, this rotational effort fails to effectively transmit to the main nut 2 makes it follow rotatory, auxiliary nut 3 with the main nut 2 produces relative rotary motion, namely main nut 2 can not be in the direction of pine and takes off rotatory, and auxiliary nut 3 will be in the direction of pine and rotate and keep away from the application of force body, and toward receiving the motion of clamping piece direction, just also form the effect that the combined nut increases clamping strength, further press from both sides and treat the clamping piece, reach the improvement the effect that the tight quality of anti-loosening combined screw presss from both sides.

It should be noted that when the main nut 2 and the sub nut 3 are screwed, it should be noted that the spring washer 6 is always kept sufficiently close to each other under the action of the main nut and the sub nut, and the main nut 2 and the sub nut 3 are rotated as much as possible to approach the required clamping strength, so that the spring washer 6 still has a spring action with sufficient strength when the member to be clamped is clamped.

As shown in fig. 7, the height of the cylinder 22 is smaller than that of the sub-nut 3.

In this embodiment, the height of the cylinder 22 is smaller than that of the auxiliary nut 3, when the auxiliary nut 3 is completely screwed tightly on the main nut 2, the end surface of the main body 22 cannot penetrate through the auxiliary hole 31 and protrude from the end surface of the auxiliary nut 3, so as to ensure that the main nut 2 cannot be in direct contact with a member to be clamped, and the auxiliary nut 3 must be pressed on the member to be clamped, thereby improving the locking stability of the anti-loosening combined screw.

As shown in fig. 2, the screw head 11 is further included, and the screw head 11 is fixed to an end surface of the screw 12.

In this embodiment, the screw head 11 is fixed to the end surface of the screw 12, and the screw head 11 and the screw 12 are integrally formed, so as to improve the structural stability of the screw 12.

As shown in fig. 2, the screw head 11 includes a tightening body 111 and a clamping body 112;

the clamping body 112 is fixed on the end surface of the tightening body 111;

the cross-sectional area of the clamping body 112 is larger than that of the tightening body 111, and the clamping body 112 is used for being attached to a piece to be clamped;

the cross section of the tightening body 111 is polygonal.

In this implementation, when pressing from both sides and treating the clamping piece, specifically the terminal surface of spiral shell head 11 with the terminal surface of vice nut presss from both sides and treats the clamping piece, the terminal surface cross sectional area of spiral shell head 11 is more favorable to improving clamping effect more big, if do not set up press from both sides tight body 112 then need increase turn round the cross sectional area of tight body 111 and just can improve clamping effect, be unfavorable for manufacturing and use, and this application through turn round the top surface of tight body 111 and set up and press from both sides tight body 112, only need increase when manufacturing press from both sides tight body 112 cross sectional area can, need not to change turn round the cross sectional area of tight body 111.

In this embodiment, the cross section of the tightening body 111 is a hexagon, and the tightening body 111 is configured to be a hexagon to facilitate fixing and twisting by a wrench during tightening.

As shown in fig. 10, in another embodiment, the anti-loosening combination screw may also be applied to the application field of self-tapping screws, specifically, the auxiliary nut 3 is twisted into the main nut 2 to form a combination nut, then the combination nut is twisted into the screw rod 12, and the end surface of the main nut 2 is completely attached to the screw head 11, and when in use, the screw rod 12 is twisted into a self-tapping member, such as a wood board, until the wood board is completely attached to the combination nut, and the working principle of loosening can also be realized.

As shown in fig. 9, an end surface of the clamping body 112 is provided with a first anti-slip texture 1121.

In this embodiment, the first anti-slip threads 1121 are disposed on the end surface of the clamping body 112, and after the clamping member is clamped, the first anti-slip threads 1121 can prevent the clamping member from sliding, so as to avoid the loosening and loosening phenomenon, thereby achieving the effect of improving the clamping stability of the clamping body 112.

As shown in fig. 7, the radial minimum length of the force applying body 21 is greater than the radial maximum length of the secondary orifice 31.

In this embodiment, the radial minimum length of the force applying body 21 is greater than the radial maximum length of the secondary hole 31, so that the corner of the force applying body 21 is prevented from being embedded in the secondary hole 31 after the secondary nut 3 is completely twisted into the column 22, thereby affecting the installation quality and the installation efficiency.

As shown in fig. 7, the maximum radial length of the secondary hole 31 is 2/3 of the minimum radial length of the force applying body 21.

In this embodiment, the maximum radial length of the secondary hole 31 is 2/3 which is the minimum radial length of the force applying body 21, and the structure is most stable and reliable when the secondary nut 3 is twisted into the column 22.

As shown in fig. 1, the cross-sectional area of the sub-nut 3 is larger than the cross-sectional area of the force applying body 21.

In this embodiment, the cross-sectional area of the auxiliary nut 3 refers to the area of a cross section perpendicular to the axial direction of the auxiliary hole 31, the cross-sectional area of the force applying body 21 refers to the area of a cross section perpendicular to the axial direction of the main hole 23, and the cross-sectional area of the auxiliary nut 3 is larger than the cross-sectional area of the force applying body 21, so that the anti-loosening combination screw is convenient to use, the auxiliary nut 3 is more easily stressed, the structure is more stable, and the auxiliary nut 3 is more convenient to use.

As shown in fig. 8, further includes a spacer 5;

the washer 5 penetrates the screw 12, and the washer 5 is located between the clamping body 112 and the secondary nut 3.

In this embodiment, the quantity of gasket 5 is two, during the installation, firstly one the gasket 5 penetrates the screw rod 12, then penetrates again and waits to press from both sides the piece, then penetrates another the gasket 5, then twists into the assembly of main nut 2 and vice nut 3 the screw rod 12 sets up the gasket 5 can be suitable for the multiple specification and dimension's the piece of waiting to press from both sides, and can also protect and wait to press from both sides the piece quilt clamp 112 with vice nut 3 scrapes the flower, reaches the improvement the effect of locking loose combination screw commonality.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides an anti-loosening combination screw which characterized in that: comprises a screw rod, a main nut and an auxiliary nut;

the outer surface of the screw is provided with a first thread;

the main nut is arranged on the screw rod;

the main nut comprises a force application body and a cylinder;

the column body is fixed on the end surface of the force application body;

the outer surface of the column body is provided with a second thread;

the thread direction of the second thread is opposite to the thread direction of the first thread;

main holes are arranged along the axial direction of the column body and the axial direction of the force applying body in a penetrating way;

the main hole is provided with a third thread;

the thread turning direction of the first thread is the same as the thread turning direction of the third thread;

the first thread and the third thread are mutually matched;

the auxiliary nut is arranged on the column body;

an auxiliary hole penetrates through the auxiliary nut along the axis direction of the auxiliary nut;

the auxiliary hole is provided with a fourth thread;

the thread turning direction of the fourth thread is the same as the thread turning direction of the second thread;

the fourth thread is interfitted with the second thread.

2. The anti-loosening combination screw as claimed in claim 1, wherein: also includes a spring washer;

the spring washer is arranged between the main nut and the auxiliary nut;

the end face of the auxiliary nut is provided with second anti-skid grains;

the end face of the force application body connected with the column body is provided with a third anti-skidding line.

3. The anti-loosening combination screw as claimed in claim 1, wherein: the height of the column is smaller than that of the auxiliary nut.

4. The anti-loosening combination screw as claimed in claim 1, wherein: the screw is characterized by further comprising a screw head, and the screw head is fixed on the end face of the screw.

5. The anti-loosening combination screw as claimed in claim 4, wherein: the screw head comprises a tightening body and a clamping body;

the clamping body is fixed on the end face of the tightening body;

the cross-sectional area of the clamping body is larger than that of the tightening body, and the clamping body is used for being attached to a piece to be clamped;

the cross section of the tightening body is polygonal.

6. The anti-loosening combination screw as claimed in claim 5, wherein: the end face of the clamping body is provided with a first anti-skid grain.

7. The anti-loosening combination screw as claimed in claim 1, wherein: the radial minimum length of the force application body is larger than the radial maximum length of the secondary hole.

8. The anti-loosening combination screw as claimed in claim 7, wherein: the radial maximum length of the secondary orifice is 2/3 the radial minimum length of the force applying body.

9. The anti-loosening combination screw as claimed in claim 1, wherein: the cross-sectional area of the auxiliary nut is larger than that of the force applying body.

10. The anti-loosening combination screw as claimed in claim 5, wherein: also includes a gasket;

the gasket penetrates into the screw rod, and the gasket is located between the clamping body and the auxiliary nut.

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