CN105650082B - A kind of self-locking structure - Google Patents

Abstract

The present invention provides a self-locking structure, which includes a slider, a limiting block, a guide, a rotating member, an engaging piece and a clip bar; the limiting block is arranged on one side of the slider and can slide relative to the slider through the guide, and The rotating part can be blocked when it is closest to the slider; the rotating part is connected to the slider in rotation, and the engaging part is also connected to the rotating part in rotation, but not connected to the slider; the two rotation centers are not coaxial, so that the rotating part can drive The engaging part rotates relative to the slider around the rotation center of the rotating part; the slider is provided with a first limiting part, and the rotating part is provided with a second limiting part; the clip is arranged on one side of the slider, parallel to the guide , using a helical tooth structure to block the engaging part when it is in contact with the clip; when the limit block is closest to the slider and the clip clips the clip, the limit block blocks the rotating part, and the rotating part and the clip The parts cannot be rotated, and the self-locking structure realizes self-locking. The invention uses the principle of gravity to design a self-locking structure, which has simple structure, good self-locking performance, safety, reliability and good practicability.

Description

a self-locking structure

【Technical field】

The invention relates to the field of locking devices, in particular to a self-locking structure for an up and down sliding device.

【Background technique】

At present, there are various self-locking structures, the structures are different, and the principles are not the same. Some structures are simple, but the self-locking structure is not strong enough, and the self-locking structure with better self-locking performance is more complicated in structure, and even some Parts are difficult to machine, increasing the cost of production. Therefore, it is necessary to provide a self-locking structure with simple structure, convenient use, good self-locking performance, low production cost and strong practicability.

【Content of invention】

In order to achieve the above purpose, the technical solution adopted by the present invention is: a self-locking structure, the self-locking structure includes a slider, a limit block, a guide, a rotating part, a snap-fitting part and a clip; the limit The block is arranged on one side of the slider, can slide relative to the slider through the guide, and can hold the rotating member when it is closest to the slider; the rotating member rotates with the slider connected, the engaging member is also rotationally connected to the rotating member, but not connected to the slider; the two centers of rotation are not coaxial, so that the rotating member can drive the engaging member to rotate around the The center of rotation of the rotating member rotates relative to the slider; the slider is provided with a first limiting portion, which is located on one side of the rotating center of the rotating member and can limit the rotation of the rotating member; The rotating part is provided with a second limiting part, the second limiting part is located on the side of the limiting end, and is used to limit the rotation of the limiting end; the clamping bar is arranged on the side of the slider , arranged in parallel with the guide piece, using a helical tooth structure to clamp the engaging piece when in contact with the clip; when the limiting block is closest to the slider and the clip is stuck When the engaging part is used, the limiting block clamps the rotating part, the rotating part and the engaging part cannot rotate, and the self-locking structure realizes self-locking.

Further, the helical tooth structure of the clamping strip does not face away from the engaging member; the first rotation axis and the second rotation axis are arranged in parallel and perpendicular to the extending direction of the guide member.

Further, a first protrusion is arranged on the limiting block, a second protrusion is arranged on the rotating member, and the first protrusion is stuck on the sliding block when the limiting block is closest to the sliding block. The second protrusion is used to limit the rotation of the rotating member.

Further, the slider is provided with a first groove, the rotating member is installed in the first groove on the slider, and can rotate in the first groove; the first limit The part is arranged at one end of the first groove.

Further, a second groove is formed on the rotating member; the engaging member is installed in the second groove and can rotate in the second groove.

Further, the second limiting part is located at one end of the second groove and the side closest to the first rotation axis.

Further, the engaging part is bounded by the center of rotation of the engaging part, and is divided into an engaging end and a limiting end, and the gravity of the limiting end is greater than that of the engaging end.

Further, the length of the limiting end is greater than the minimum distance from the rotation center of the engaging member to the second limiting portion.

Further, the engaging end adopts a pointed structure; in a natural state, the engaging end is closer to the clamping strip than the limiting end.

Further, the slider can slide, and the installation height of the top of the bar helical tooth structure is higher than the height at which the slider slides and stops; the length of the bar helical tooth structure is not less than the slider and the The sum of the heights of the limit blocks.

The present invention has the following beneficial effects:

The self-locking structure designed by the present invention using the principle of gravity has the advantages of simple structure, convenient operation, good self-locking performance, safety and reliability, easy processing and better practicability.

【Description of drawings】

Fig. 1 is a structural perspective view of a self-locking structure of the present invention.

Fig. 2 is a cross-sectional view of the self-locking structure of the present invention when it is self-locking.

Fig. 3 is a cross-sectional view when the self-locking structure of the present invention is unlocked.

Fig. 4 is a structural schematic diagram of the slider of the present invention.

Fig. 5 is a schematic diagram of the structure of the limiting block of the present invention.

Fig. 6 is a structural schematic diagram of the rotating member of the present invention.

Fig. 7 is a schematic structural view of the clip of the present invention.

Description of main component symbols

slider 1 first groove 11 The first limit part 12 Limit block 2 first bump 21 third groove 22 Turning part 3 Second bump 31 Second groove 32 Second stopper 33 Fastener 4 Snap end 41 limit end 42 card strip 5 guide 6 Fixtures 61 First axis of rotation 7 Second axis of rotation 8

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

【detailed description】

Please refer to Fig. 1 to Fig. 7, in a preferred embodiment of the present invention, a self-locking structure includes a slider 1, a limit block 2, a rotating part 3, an engaging part 4, a clip bar 5 and guide 6.

A first groove 11 is provided on one side of the slider 1, and the first groove 11 connects the upper and lower surfaces of the slider 1; a first stopper 12 is provided on the bottom surface of the first groove 11 , the first limiting portion 12 is in the form of a baffle. Preferably, the upper surface of the first limiting portion 12 is coplanar with the upper surface of the slider 1 .

The limiting block 2 is arranged under the slider 1 , connected with the slider 1 through the guide 6 , and can slide up and down relative to the slider 1 along the guide 6 . A first protrusion 21 is provided on the upper part of the limiting block 2, and when the first protrusion 21 slides on the limiting block 2 and is closest to the sliding block 1, it can resist the sliding block 1 and drive The slider 1 slides. One side of the limiting block 2 is provided with a third groove 22 that connects the upper and lower surfaces of the limiting block 2, the third groove 22 is on the same side as the first groove 11, and is on the same side as the first groove 11. On one side of the first protrusion 21 , preferably, the width of the third groove 22 is the same as that of the first groove 11 . In another embodiment of the present invention, the slider 1 can slide relative to the limit block 2 along the guide member 6, and when it slides down and is closest to the limit block 2, it can be aligned with the first protrusion. 21 contacts, and then drives the limit block 2 to slide.

One end of the guide 6 is fixed on the slider 1, and the other end is equipped with a fixing device 61 for preventing the stopper 2 from falling, and the fixing device 61 can also limit the relative position of the stopper 2. The sliding distance of the slider 1. Preferably, the guide member 6 is a threaded polished rod, and the fixing device 61 is a nut matched with the polished rod.

The rotating member 3 is installed in the first groove 11 opened by the slider 1, one end is located below the first limiting portion 12, and is connected to the slider 1 through the first rotating shaft 7, and It can rotate upward around the first rotating shaft 7 , and when rotating downward, because the end of the rotating member 3 can be resisted by the first limiting portion 12 , it can only rotate in a small range. The other end of the rotating member 3 is connected to the engaging member 4 through the second rotating shaft 8, so that the engaging member 4 can rotate around the second rotating shaft 8 relative to the rotating member 3, and when This end is provided with a second groove 32 that connects the upper and lower surfaces of the rotating member 3, and the second groove 32 is used to install the engaging member 4 and allow the engaging member 4 to rotate up and down; The second groove 32 is also located on one side of the first rotating shaft 7 . The rotating member 3 is provided with a second limiting portion 33, the second limiting portion 33 is located on the side of the first rotating shaft 7, and is on the side of the rotating member 3 facing the second groove 32. extended, used to limit the rotation of the engaging member 4 . A wedge-shaped second protrusion 31 is provided at the lower part of the joint between the rotating member 3 and the first rotating shaft 7 , and the second protrusion 31 is located between the limiting block 2 and the sliding block 1 . When it slides and is closest to the slider 1, it can be blocked by the first protrusion 21 on the limit block 2, thereby limiting the rotation of the rotating member 3. At this time, the second protrusion 31 is located at One side of the first protrusion 21 and not between the first protrusion 21 and the second rotating shaft 8 . Preferably, the first rotating shaft 7 is arranged parallel to the second rotating shaft 8 and perpendicular to the extending direction of the guiding member 6 .

With the second rotating shaft 8 as a boundary, the engaging member 4 is divided into an engaging end 41 and a limiting end 42. In a natural state, relative to the limiting end 42, the engaging end 41 Closer to the clip 5. The gravity of the engaging end 41 is smaller than the gravity of the limiting end 42, so that the engaging member 4 can be formed due to the difference in gravity between the engaging end 41 and the limiting end 42 in a natural state. turn. The length of the limiting end 42 is greater than the minimum distance from the second rotating shaft 8 to the second limiting portion 33 , so as to limit excessive tilting rotation of the engaging member 4 toward the limiting end 42 . The end of the engaging end 41 close to the clamping strip 5 adopts a pointed shape, so that the engaging member 4 can be clamped in the clamping strip 5 .

The clamping strip 5 is vertically fixed on the side of the first groove 11 of the slider 1, and can pass through all parts of the slider 1 when the slider 1 and the limiting block 2 slide. The first groove 11 and the third groove 22 of the limiting block 2 are not in contact with the slider 1 and the limiting block 2 . The clip bar 5 is arranged parallel to the guide piece 6 . The side of the clamping strip 5 not facing away from the engaging member 4 adopts a helical tooth structure, and when the limiting block 2 is closest to the slider 1, the clamping strip 5 clamps the clamping The engaging end 41 of the part 4 can lock the engaging part 4 and the rotating part 3 under the action of the limiting block 2, so that the self-locking structure achieves the purpose of self-locking. Preferably, the helical tooth structure of the clip bar 5 is arranged on the opposite side of the engaging member 4, the installation height of the top is higher than the height of the upper surface of the slider 1 when it stops sliding, and the length of the helical tooth structure is less than It is smaller than the sum of the heights of the slider 1 and the limit block 2, which facilitates better self-locking of the self-locking structure.

When the self-locking mechanism is in a non-working state, the rotating member 3 rotates downward around the first rotating shaft 7 due to the greater gravity on the second rotating shaft 8 side, but due to the 1, the function of the first limiting portion 12 stops the rotation, and finally, the end of the rotating member 3 where the first rotating shaft 7 is located is against the first limiting portion 12, and the rotating member 3 is Rotate slightly. The engaging member 4 also rotates with the rotating member 3 when the rotating member 3 rotates, and because the gravity of the limiting end 42 of the engaging member 4 is greater than the gravity of the engaging end 41 The rotation relative to the rotating member 3 occurs, but the engaging member 4 will stop rotating due to the resistance of the second limiting part 33. At this time, the bottom of the limiting end 42 is in contact with the first The upper surfaces of the two limiting parts 33 are in direct contact.

When the self-locking structure realizes self-locking, the limiting block 2 slides up along the guide 6 and gradually approaches the slider 1, and the top of the first protrusion 21 on the limiting block 2 contact with the bottom of the rotating member 3, and clamp the second protrusion 31 on the rotating member 3, at this time, the rotating member 3 can rotate upward around the first rotating shaft 7 until The top of the first protrusion 21 stops rotating when it contacts the bottom of the slider 1; Block 2 moves up. When the engaging piece 4 contacts the clamping strip 5, the engaging end 41 will slide into the chute of the clamping strip 5, and the engaging piece 4 will act on the helical teeth of the clamping strip 5. The lower engaging end 41 will rotate downward around the second rotating shaft 8 and drive the rotating member 3 to rotate, but since the first protrusion 21 blocks the second protrusion 31, Therefore, the rotating member 3 cannot rotate, and the engaging member 4 stops rotating after rotating a certain angle. At this time, the sliding block 1 and the limiting block 2 stop sliding upward, the rotating member 3 and the engaging member 4 cannot rotate, and the engaging end 41 of the engaging member 4 is stuck on the In the chute of the clip bar 5, the self-locking structure realizes self-locking.

When the self-locking structure is unlocked, the limiting block 2 slides downward, and the first protrusion 21 gradually disengages from the second protrusion 31. During the disengagement process, the engagement of the engaging member 4 The end 41 has a tendency to rotate downward around the second rotation axis 8 due to the action of the helical teeth of the clip bar 5, and makes the rotating member 3 have a tendency to rotate upward around the first rotation axis 7, The self-locking structure starts to unlock; when the first protrusion 21 is completely separated from the second protrusion 31, the engaging member 4 and the rotating member 3 start to rotate until the engaging member 4 is completely Break away from the clamping strip 5, at this moment, the unlocking of the self-locking structure is completed.

The self-locking structure designed by using gravity as the driving force in the present invention has simple structure, convenient use, firm and reliable self-locking, and better practicability.

The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not used to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention shall belong to The scope of patents covered by the present invention.

Claims (10)

1. A self-locking structure, characterized in that: the self-locking structure includes a slide block, a limit block, a guide, a rotating part, a snap-fit piece and a clip; the limit block is arranged on one side of the slide block. side, can slide relative to the slider through the guide piece, and can hold the rotating piece when it is closest to the slider; The rotatable part is rotatably connected with the slider, and the engaging part is also rotatably connected with the rotatable part, but not connected with the slider; the two rotation centers are not coaxial, so that the rotatable part can drive The engaging member rotates relative to the slider around the rotation center of the rotating member; the engaging member is divided into an engaging end and a limiting end bounded by the rotating center of the engaging member; The slider is provided with a first limiting part, the first limiting part is located on one side of the rotation center of the rotating part, and can limit the rotation of the rotating part; the rotating part is provided with a second limiting part part, the second limiting part is located on one side of the limiting end, and is used to limit the rotation of the limiting end; The clip is arranged on one side of the slider, parallel to the guide, and adopts a helical tooth structure to block the clip when it is in contact with the clip; when the limit block is separated from When the slider is closest and the clamping bar clamps the engaging part, the limiting block clamps the rotating part, the rotating part and the engaging part cannot rotate, and the self-locking structure realizes Self-locking. 2. The self-locking structure according to claim 1, characterized in that: the helical tooth structure of the clip bar does not face away from the engaging part; one end of the rotating part passes through the first rotating shaft and the sliding block The other end is connected to the engaging member through a second rotating shaft; the first rotating shaft and the second rotating shaft are arranged in parallel and perpendicular to the extending direction of the guiding member. 3. The self-locking structure according to claim 1, characterized in that: a first protrusion is arranged on the limiting block, a second protrusion is arranged on the rotating member, and the first protrusion When the limiting block is closest to the sliding block, the second protrusion is clamped to limit the rotation of the rotating member. 4. The self-locking structure according to claim 1, characterized in that: the slider is provided with a first groove, the rotating member is installed in the first groove on the slider, and can rotate in the first groove; the first limiting part is arranged at one end of the first groove. 5. The self-locking structure according to claim 2, characterized in that: a second groove is opened on the rotating part; the engaging part is installed in the second groove, and can Rotate in two grooves. 6 . The self-locking structure according to claim 5 , wherein the second limiting portion is located at one end of the second groove and the side closest to the first rotation axis. 7 . 7. The self-locking structure according to claim 1, wherein the gravity of the limiting end is greater than that of the locking end. 8. The self-locking structure according to claim 7, wherein the length of the limiting end is greater than the minimum distance from the rotation center of the engaging member to the second limiting portion. 9. The self-locking structure according to claim 7, characterized in that: the engaging end adopts a pointed structure; in a natural state, compared with the limiting end, the engaging end is closer to the card. 10. The self-locking structure according to claim 1, characterized in that: the slider can slide, and the installation height of the top of the bar helical tooth structure is higher than the height where the slider stops sliding; The length of the bar helical tooth structure is not less than the sum of the heights of the slider and the limit block.