CN112555257B

CN112555257B - Anti-drop screw structure and locking device

Info

Publication number: CN112555257B
Application number: CN201910920325.4A
Authority: CN
Inventors: 金根浩; 秋成云
Original assignee: Xia Tai Xin Semiconductor Qing Dao Ltd
Current assignee: Xia Tai Xin Semiconductor Qing Dao Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2022-11-25
Anticipated expiration: 2039-09-26
Also published as: CN112555257A

Abstract

An anti-drop screw structure comprises a composite diameter screw, wherein the composite diameter screw comprises a screw head; the screw post and the screw head are integrally formed, and threads are arranged on the periphery of the screw post; the screw column comprises a first screw column and a second screw column which are coaxial and connected together, the diameter of the first screw column is larger than that of the second screw column, and the second screw column is located at one end, far away from the screw head, of the screw column; the screw post has an inner chamber, the global of inner chamber is equipped with the screw thread, the portion that has the screw thread of inner chamber has the different diameters. The anti-falling screw structure is fixed through threaded connection between screw columns with different diameters, so that vibration with various frequencies is resisted, and loosening of screws is avoided. The invention also provides a locking device comprising the anti-falling screw structure.

Description

Anti-drop screw structure and locking device

Technical Field

The invention relates to the field of screw locking, in particular to an anti-drop screw structure and a locking device comprising the same.

Background

When the device and the part of the vibrating equipment are installed, a screw, a nut and a washer with a single diameter are generally used for fixing, and the fixing mode is easy to cause the screw to be loosened in the continuous vibrating process, so that the use of the equipment is influenced.

Disclosure of Invention

In view of the above, it is desirable to provide an anti-loosening screw structure and a locking device with different stud diameters.

An anti-drop screw structure comprises a composite diameter screw, wherein the composite diameter screw comprises a screw head and a screw column, the screw column and the screw head are integrally formed, and threads are arranged on the periphery of the screw column; the screw column comprises a first screw column and a second screw column which are coaxial and connected together, the diameter of the first screw column is larger than that of the second screw column, and the second screw column is located at one end, far away from the screw head, of the screw column; the screw post has an inner chamber, the global of inner chamber is equipped with the screw thread, the portion that has the screw thread of inner chamber has the different diameters.

Preferably, the screw thread of the periphery of the screw column comprises a first screw thread and a second screw thread, the first screw thread is arranged on the periphery of the first screw column, and the second screw thread is arranged on the periphery of the second screw column.

Preferably, the anti-drop screw structure further comprises an opposite direction screw, and an opposite direction screw column of the opposite direction screw is inserted into an inner cavity of the screw column and is matched with the thread of the inner cavity.

Preferably, the screw thread of the peripheral surface of the inner cavity includes a third screw thread and a fourth screw thread, the periphery of the opposite direction screw post is provided with a fifth screw thread and a sixth screw thread, the fifth screw thread is matched with the third screw thread, and the sixth screw thread is matched with the fourth screw thread.

Preferably, the opposite direction screw post comprises a third screw post and a fourth screw post which are coaxial and connected together, the fifth thread is arranged on the periphery of the third screw post, and the sixth thread is arranged on the periphery of the fourth screw post.

Preferably, the diameter of the fourth screw post is greater than the diameter of the third screw post, and the third screw post is located at an end of the opposite screw.

Preferably, the anti-dropping screw structure further comprises an anti-slip member, and the anti-slip member is arranged on one side of the screw head facing the screw column.

Preferably, a through hole is formed in the screw head and communicated with the inner cavity of the screw column.

Preferably, the threads of the first and second threads are trapezoidal threads.

Preferably, the angle of the profile angle of the first thread is 30 ° to 60 °.

A locking device comprises a device body and a combination assembly, the locking device further comprises the anti-falling screw structure, and the device body is connected with the combination assembly through the anti-falling screw structure.

Preferably, the device body is provided with a mounting groove, the combination assembly is provided with a mounting hole, the side edge of the mounting groove is provided with a thread group, and a composite diameter screw of the anti-loosening screw structure penetrates through the mounting hole, enters the mounting groove and is matched with the thread group.

Preferably, the opposite screw of the anti-dropping screw structure is fixedly arranged at the bottom of the mounting groove, and the screw with the composite diameter is simultaneously in threaded connection with the thread group and the opposite screw.

Preferably, the bottom of the mounting groove is provided with a through hole, and an opposite screw of the anti-drop screw structure is inserted into the through hole and connected with the composite diameter screw.

The anti-falling screw structure provided by the invention realizes fixation through threaded connection among screw columns with different diameters, so that vibration with various frequencies is resisted. Even if vibration with a specific frequency (frequency capable of causing resonance of a certain diameter thread) is continuously generated, the threaded connection between the screw columns with different diameters can still be kept fixed, and the situation that the screw columns are not easy to loosen is avoided.

Drawings

Fig. 1 is a schematic structural diagram of an anti-loosening screw structure and a locking device in a first embodiment.

Fig. 2 is a schematic structural view of the anti-loosening screw structure shown in fig. 1.

Fig. 3 is a top view of the screw head of the composite diameter screw of the anti-drop screw structure shown in fig. 2.

Fig. 4 is a schematic structural view of the anti-slip member of the anti-slip screw structure shown in fig. 1.

Fig. 5 is a schematic structural diagram of threads of the first thread or/and the second thread of the anti-drop screw structure in another embodiment.

Fig. 6 is a schematic view of the connection structure of the screw thread and the screw thread shown in fig. 4.

Fig. 7 is a schematic structural view of an anti-separation screw structure in a second embodiment.

Fig. 8 is a schematic structural view of an anti-separation screw structure in a third embodiment.

Fig. 9 is a schematic structural view of an anti-separation screw structure in a fourth embodiment.

Fig. 10 is a schematic structural view of an anti-separation screw structure in a fifth embodiment.

Fig. 11 is a schematic structural view of an anti-separation screw structure in a sixth embodiment.

Description of the main element symbols:

the specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1 and 2, the anti-loose screw structure 100 is disposed in the locking device 500, and is used for connecting and locking the device body 5 and the coupling assembly 6 of the locking device 500. The anti-loosening screw structure 100 includes a composite diameter screw 10, and the composite diameter screw 10 includes a screw head 11 and a screw post 12. The screw post 12 with the screw head 11 integrated into one piece, screw thread is equipped with to screw post 12 periphery. The screw post 12 includes a first screw post 121 and a second screw post 122 that are coaxial and connected together, and a diameter D1 of the first screw post 121 is greater than a diameter D2 of the second screw post 122. The second screw post 122 is located at an end of the screw post 12 far away from the screw head 11. The screw post 12 has an inner cavity 13, the peripheral face of inner cavity 13 is equipped with the screw thread, inner cavity 13 has different diameters. In the present embodiment, the threads without specific description of the structure are all common standard threads, and the present invention does not limit the specific type and size of the threads.

Specifically, the thread of the outer circumference of the screw cylinder 12 includes a first thread 1211 and a second thread 1221, the first thread 1211 is disposed on the outer circumference of the first screw cylinder 121, and the second thread 1221 is disposed on the outer circumference of the second screw cylinder 122. In order to prevent the composite diameter screw 10 from being jammed during installation, the pitch of the first threads 1211 is the same as the pitch of the second threads 1221. Other parameters such as thread profile, thread height, etc. of the first and

second threads

1211 and 1221 may be the same or different.

The anti-loosening screw structure 100 further includes an opposite screw 20, and an opposite screw post of the opposite screw 20 is inserted into the inner cavity 13 and is engaged with the threads on the periphery of the inner cavity 13. The threads on the peripheral surface of the inner cavity 13 include a third thread 131 and a fourth thread 132, and the diameter of the top of the third thread 131 is smaller than that of the top of the fourth thread 132, that is, the diameter of the inner cavity 13 at the position of the third thread 131 is smaller than that of the inner cavity 13 at the position of the fourth thread 132. The opposite direction screw column comprises a third screw column 21 and a fourth screw column 22 which are coaxial and connected together, the diameter d3 of the third screw column 21 is smaller than the diameter d4 of the fourth screw column 22, and the third screw column 21 is located at the end part of the opposite direction screw 20. The periphery of the third screw post 21 is provided with a fifth thread 211, and the periphery of the fourth screw post 22 is provided with a sixth thread 221. When the screw post of the opposite direction screw 20 is inserted into the inner cavity 13 and combined with the composite diameter screw 10, the fifth thread 211 is engaged with the third thread 131, and the sixth thread 221 is engaged with the fourth thread 132.

The device body 5 is provided with a mounting groove 52, the peripheral surface of the mounting groove 52 is provided with a thread group 51, the opposite screw 20 is fixedly arranged at the bottom of the mounting groove 52, and when the composite diameter screw 10 is screwed into the mounting groove, the screw group 51 and the opposite screw 20 are simultaneously in threaded connection with the composite diameter screw 10, so that the connection and fixation of the device body 5 and the combination component 6 are realized. In other embodiments, the bottom of the mounting groove 52 may be provided with a through hole, and the opposite screw 20 may be inserted into the through hole at the bottom of the mounting groove 52, and screwed and fixed with the composite diameter screw 10.

Be equipped with mounting hole 61 on the combination module 6, compound diameter screw 10 the screw head 11 supports holds one side of mounting hole 61, screw post 12 passes mounting hole 61 and enters into mounting groove 52, the first screw 1211 and the second screw 1221 of screw post 12 periphery with thread group 51 threaded connection, subtend screw 20 with inner chamber 13 threaded connection, thereby will device body 5 with combination module 6 is connected. The thread group 51 may include a plurality of threads, and a gap exists between the thread group matched with the first thread 1211 and the thread group matched with the second thread 1221, so that the vibration of various frequencies can be correspondingly resisted, the influence of resonance is reduced, and the phenomenon of thread slippage of the composite diameter screw 10 is avoided.

Anticreep screw structure 100 realizes fixing through threaded connection and the two-way lock screw structure between the different diameter screw posts, can effectively reduce the screw pine that various frequency vibration caused and take off. Even if vibration with a specific frequency (frequency capable of causing resonance of a certain diameter thread) is continuously generated, the threaded connection between the screw columns with different diameters can still be kept fixed, and the situation that the screw columns are not easy to loosen is avoided.

Referring to fig. 2 and 3, a substantially hexagonal recess 111 is formed on the screw head 11, and a mounting tool such as a screw wrench can be inserted into the recess 111 to drive the screw head 11 to rotate, so as to tighten the screw 10 with a composite diameter. In other embodiments, the shape of the groove 111 may also be a straight shape or a cross shape, which is not limited in this embodiment. The upper surface of screw head 11 is provided with one deck magnetism wearing layer 14, can make compound diameter screw 10 adsorbs on mounting tool when using, avoids the condition that the screw dropped, can prevent simultaneously compound diameter screw 10 appears after using many times the condition of recess 111 wearing and tearing is favorable to the extension compound diameter screw 10's use number of times and life.

Further, a through hole 112 is further formed in the screw head 11, and the through hole 112 is communicated with the inner cavity 13 of the screw post 12. Other screws or parts (not shown) can enter the inner cavity 13 through the through holes 112 and be in threaded connection with the third threads 131, so that the function of the composite-diameter screw 10 is expanded.

Referring to fig. 1 and 4, in a preferred embodiment, the anti-unscrewing structure 100 further includes an anti-slipping member 3, and the anti-slipping member 3 is disposed on a side of the screw head 11 facing the screw post 12. The anti-slip piece 3 is approximately in a circular ring shape and can be sleeved on the screw post 12 and attached to the lower end face of the screw head 11. The lower end face of the anti-skid piece 3 is roughly in a sawtooth shape, when the composite diameter screw 10 is locked, the lower end face of the anti-skid piece 3 abuts against one side end face of the mounting hole 61, and the sawtooth structure is beneficial to enhancing the friction resistance between the anti-skid piece 3 and a contact surface, so that the composite diameter screw 10 is further prevented from being loosened.

The anti-slip elements 3 may be made of an elastic material, which is advantageous for damping mechanical vibrations. In other embodiments, the anti-slip member 3 may be integrally formed with the screw head 11, and the anti-slip member 3 is directly formed on the lower end surface of the screw head 11 and made of the same material as the screw head 11.

Referring to fig. 1, 5 and 6, in another preferred embodiment, the threads of the first thread 1211 are substantially trapezoidal. Specifically, the trapezoidal thread of the first thread 1211 has a first side edge 1212 and a second side edge 1213, an included angle between the first side edge 1212 and the second side edge 1213 is a thread form angle of the first thread 1211, and the angle of the thread form angle is 30 ° to 60 °. An included angle α between the first side 1212 and the horizontal direction (i.e., the direction perpendicular to the end surface of the trapezoidal thread) is smaller than an included angle β between the second side 1213 and the horizontal direction, so that when the first thread 1211 is in threaded connection with the thread group 51, the vertex of the first side 1212 and the end surface of the thread abuts against the thread side of the thread group 51, so that the first thread 1211 can apply an upward force (the view angle of fig. 6) to the thread group 51 during vibration, and the locking of the composite diameter screw 10 is maintained by the reactive force of the thread group 51 on the first thread 1211, thereby preventing the screw from loosening. Preferably, the thread of the second thread 1221 may have the same trapezoidal structure as the first thread 1211, so as to enhance the locking performance of the composite diameter screw 10.

It is understood that in other embodiments, the compound diameter screw 10 and the opposing screw 20 may have more diameters and more threads to resist more frequency vibrations, and the present embodiment is not limited to the number of multiple diameters and threads.

Example two

Referring to fig. 7, the anti-loosening screw structure of the second embodiment is substantially the same as the anti-loosening screw structure 100 of the first embodiment, except that the second screw column 122 is substantially tapered, the second thread 1221 can be a common pipe thread, and the tightness of the connection can be ensured by using the deformation of the second thread after screwing. Further, the first screw post 121 may also be tapered, and the first thread 1211 may be a pipe thread identical to the second thread 1221, or may be another standard connection thread, which is not limited in this embodiment. The threads of the thread group 51 of the device body 5 are always engaged with the first threads 1211 and the second threads 1221.

EXAMPLE III

Referring to fig. 8, the anti-loosening screw structure of the third embodiment is substantially the same as the anti-loosening screw structure 100 of the first embodiment, except that the composite diameter screw 10 of the third embodiment is a solid structure, and the connection and fixation between the device body 5 and the combination assembly 6 are realized only by the matching of the threads on the first screw column 121 and the second screw column 122 with the thread group 51. The function of preventing the screw from loosening is realized by using different threads on the first screw post 121 and the second screw post 122.

Example four

Referring to fig. 9, the anti-loosening screw structure of the fourth embodiment is substantially the same as the anti-loosening screw structure 100 of the first embodiment, except that the opposite screw 20 of the fourth embodiment includes a screw post with a single diameter and a single thread. When the composite diameter screw 10 is screwed into the mounting groove 52, the multiple diameter threads on the composite diameter screw 10 are matched with the thread group 51, and the screw column with the single diameter of the opposite screw 20 is inserted into the inner cavity 13 of the composite diameter screw 10 and is matched with the threads on the inner wall of the inner cavity 13, so that the device body 5 and the combination component 6 are connected and fixed.

The inner cavity 13 of the composite diameter screw 10 may have various diameters or a single diameter, and it is only necessary that the diameter and the thread of the inner cavity 13 are matched with the opposite screw 20 at the portion where the inner cavity 13 is connected with the opposite screw 20.

EXAMPLE five

Referring to fig. 10, the anti-loosening screw structure of the fifth embodiment is substantially the same as the anti-loosening screw structure 100 of the first embodiment, except that the outer surface of the screw post 12 of the screw 10 of the fifth embodiment has a single diameter and external threads, and the inner cavity 13 has different diameters and different internal threads. Thus, the thread group 51 that mates with the thread on the screw boss 12 also has a single thread. The counter screw 20 is identical to the first embodiment, has different diameters and threads and cooperates with the inner cavity 13.

In another embodiment, the screw post 12 of the multiple diameter screw 10 may be a tapered screw post having a diameter that decreases from top to bottom, and the thread provided thereon is preferably a standard pipe thread.

Example six

Referring to fig. 11, the anti-loosening screw structure of the sixth embodiment is substantially the same as the anti-loosening screw structure of the fifth embodiment, except that a through hole is formed at the bottom end of the mounting groove 52, and the opposite screw 20 can be inserted into the mounting groove 52 from the through hole to be connected with the inner cavity 13 of the composite diameter screw 10 in a matching manner, so as to realize connection and fixation of the device body 5 and the combination component 6.

The opposite screw 20 may be fixedly disposed in a through hole at the bottom of the mounting groove 52, or may be fixed by another fixing component at the bottom of the device body 5, and only the screw column portion of the opposite screw 20 passes through the through hole to be connected with the composite diameter screw 10.

In another embodiment, the opposite screw 20 is detachably mounted to the bottom of the mounting groove 52.

The invention further provides a locking device 500, which comprises a device body 5, a combination component 6 and the anti-off screw structure of any one of the above embodiments or the combination of the above embodiments, wherein the device body 5 and the combination component 6 are connected through the anti-off screw structure.

The anti-loosening screw structure 100 and the locking device 500 provided by the invention are fixed by the threaded connection between screw columns with different diameters, so that the vibration with various frequencies is resisted. Even if vibration with specific frequency (frequency capable of causing resonance of a certain diameter thread) is continuously generated, the threaded connection between the screw columns with different diameters can still be kept fixed, and the situation of loosening is not easy to occur.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.

Claims

1. An anti-drop screw structure, comprising:

a composite diameter screw comprising:

a screw head; and

the screw post is integrally formed with the screw head, and threads are arranged on the periphery of the screw post;

the screw post is characterized by comprising a first screw post and a second screw post which are coaxial and connected together, wherein the diameter of the first screw post is larger than that of the second screw post, the second screw post is positioned at one end, far away from the screw head, of the screw post, threads on the periphery of the screw post comprise first threads arranged on the periphery of the first screw post and second threads arranged on the periphery of the second screw post, and the thread pitch of the first threads is the same as that of the second threads;

the screw post has an inner chamber, the global of inner chamber is equipped with the screw thread, the portion that has the screw thread of inner chamber has the different diameters.

2. The anti-drop screw structure of claim 1, further comprising an opposing screw having opposing studs inserted into the bore of the stud and engaged with the threads of the bore.

3. The anti-drop screw structure according to claim 2, wherein the threads on the circumferential surface of the inner cavity include a third thread and a fourth thread, the outer circumference of the opposite screw post is provided with a fifth thread and a sixth thread, the fifth thread is engaged with the third thread, and the sixth thread is engaged with the fourth thread.

4. The anti-drop screw structure according to claim 3, wherein the opposite screw columns include a third screw column and a fourth screw column which are coaxial and connected together, the fifth thread is disposed on the outer periphery of the third screw column, and the sixth thread is disposed on the outer periphery of the fourth screw column; the diameter of fourth screw post is greater than the diameter of third screw post, third screw post is located the tip of subtending screw.

5. The anti-drop screw structure of claim 1, further comprising an anti-slip member disposed on a side of the screw head facing the screw post.

6. The anti-loosening screw structure according to claim 1, wherein the screw head is provided with a through hole, and the through hole is communicated with the inner cavity of the screw post.

7. A locking device, comprising:

a device body; and

a coupling assembly;

the locking device is characterized by further comprising the anti-drop screw structure as claimed in any one of claims 1 to 6, wherein the device body and the combination component are connected through the anti-drop screw structure; the device body is provided with a mounting groove, the combination assembly is provided with a mounting hole, the side edge of the mounting groove is provided with a thread group, and a composite diameter screw of the anti-loosening screw structure penetrates through the mounting hole to enter the mounting groove and be matched with the thread group.

8. The locking device as claimed in claim 7, wherein the opposing screw of the anti-separation screw structure is fixed to the bottom of the mounting groove, and the screw with a composite diameter is simultaneously screwed with the screw set and the opposing screw.

9. The locking device of claim 7, wherein the bottom of the mounting slot is formed with a through hole, and the opposing screw of the anti-loosening screw structure is inserted into the through hole and connected to the screw with a composite diameter.