CN210212753U - Folding connecting assembly - Google Patents

Abstract

The utility model discloses a folding coupling assembling belongs to commodity circulation technical field. This folding coupling assembling includes: the first connecting piece is provided with an inserting hole at one end, the section of the inserting hole comprises a semicircular main body part, and the inserting hole is provided with a first pivot shaft perpendicular to the axis of the inserting hole; the second connecting piece is provided with an inserting part which can be matched with the jack, the inserting part comprises a plug pin part with a semicircular section and a sliding connecting part connected with the plug pin part, the plug pin part is matched with the main body part, and the sliding connecting part is connected with the first connecting piece through a first pivoting shaft; a locking assembly configured to enable locking of the male portion in the female receptacle. The utility model discloses a set up the structural rigidity that inserts portion and jack made the junction and obtain improving, and improved folding coupling assembling at radial connection accuracy through semicircular insertion portion and jack cooperation.

Description

Folding connecting assembly

Technical Field

The utility model relates to a commodity circulation technical field especially relates to a folding coupling assembling.

Background

At present in the logistics technology field, unmanned aerial vehicle in the aircraft obtains the wide application. For the convenience when improving its accomodate or carry, unmanned aerial vehicle adopts foldable horn more nowadays.

Fixed arm among the current unmanned aerial vehicle and folding arm realize connecting between them through the pin joint axle usually, when first horn and second horn are the state of expanding, fixed arm and folding arm accessible draw-in groove and the protruding realization of card are connected, perhaps cam and boss lock. In the implementation process of the unmanned aerial vehicle, the inventor finds that the unmanned aerial vehicle in the prior art has the problems of low structural rigidity and unsuitability for an aircraft with high weight; and the connection precision between the folding connection assemblies between the first machine arm and the second machine arm is low, and the vibration is easily caused due to the existence of the spaciousness.

Therefore, it is desirable to provide a folding connection assembly, a folding horn and an aircraft to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a folding coupling assembling can improve the structural rigidity and the connection accuracy of the folding arm of first folding arm and second.

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

a folding connection assembly, comprising:

the folding device comprises a first connecting piece, a second connecting piece and a third connecting piece, wherein the first connecting piece is used for connecting a first folding arm, one end of the first connecting piece is provided with an insertion hole, the section of the insertion hole comprises a semicircular main body part, and the insertion hole is provided with a first pivoting shaft perpendicular to the axis of the insertion hole;

the second connecting piece is used for connecting the second folding arm and provided with an inserting part which can be matched with the jack, the inserting part comprises a plug pin part with a semicircular section and a sliding connecting part connected with the plug pin part, the plug pin part is matched with the main body part, and the sliding connecting part is connected with the first connecting piece through the first pivoting shaft;

a locking assembly configured to enable locking of the insert in the receptacle.

As an alternative to the folding connection assembly described above, the locking assembly comprises:

the locking protrusion is arranged on the second connecting piece;

and the locking protrusion can be matched with the grooved cam to lock the first connecting piece and the second connecting piece.

As an alternative to the folding connection assembly, the second pivot shaft is parallel to the first pivot shaft, and the lock protrusion extends in a direction parallel to the first pivot shaft; the groove-shaped cam can rotate forwards along a first direction to lock the first connecting piece and the second connecting piece.

As above-mentioned folding coupling assembling's alternative, the flute profile cam includes opening and locking portion that communicate each other, the locking portion is the arc wall, the one end of arc wall with the opening intercommunication, the other end are provided with backstop portion, the flute profile cam is configured into the lock protruding can follow the second direction and get into the opening, just the locking portion can wind second pin joint axle rotates the messenger backstop portion with the lock protruding butt.

As an alternative of the folding connection assembly, the locking assembly comprises two locking protrusions and two grooved cams, the two locking protrusions are symmetrically arranged on the second connecting piece, and the two grooved cams are symmetrically arranged on the first connecting piece.

As an alternative to the folding connection assembly described above, the grooved cam is provided with a wrench.

As an alternative to the above-described folding connection assembly, the wrench is provided with a snap projection on a side facing the grooved cam;

a clamping groove is formed in one side, facing the wrench, of the groove-shaped cam and matched with the clamping protrusion;

the wrench and the grooved cam are connected with the first connecting piece through the second pivoting shaft.

As an alternative of the folding connection assembly, one end, far away from the second pivot shaft, of the wrench is further provided with a locking portion, and the locking portion can be connected with the first folding arm.

As an alternative to the above-mentioned folding and connecting assembly, the locking portion is a locking spring piece adapted to the cross-sectional profile of the first folding arm, the locking spring piece having an opening, the locking spring piece being configured to be connected to the first folding arm through the opening and to hold the first folding arm tightly.

As an alternative to the above folding connection assembly, the insertion portion includes:

a plug pin portion;

the sliding connection part is parallel to the axis of the plug pin part and connected with the plug pin part, a sliding groove is formed in the sliding connection part, the first pivot shaft penetrates through the sliding groove, and the sliding groove can slide along the second direction relative to the first pivot shaft.

As an alternative to the above-described folding connection assembly, the chute comprises:

a sliding portion having a length equal to a length of the plug pin portion in an axial direction thereof;

the pin joint part is collinear with the sliding part and extends along the axial direction parallel to the plug pin part, and the pin joint part is configured to be capable of being abutted against the first pin joint shaft and enabling the second connecting piece to rotate around the first pin joint shaft.

As an alternative of the above folding connection assembly, the sliding connection portion is provided with a first limiting surface along at least one end parallel to the axial direction of the first pivot shaft, the insertion hole is provided with a second limiting surface along at least one end parallel to the axial direction of the first pivot shaft, and the first limiting surface and the second limiting surface are abutted to limit the insertion portion to rotate in the insertion hole.

One embodiment of the above utility model has the following advantages:

set up the jack on the first connecting piece through making the connection first folding arm, set up on the second connecting piece of connecting the folding arm of second can with jack complex insertion portion, wherein first connecting piece and second connecting piece are through the pin joint of first pin joint axle, the folding connection of the folding arm of first folding arm and second has been realized, and simultaneously, when the folding arm of first folding arm and second is the state of expansion, insertion portion can insert in the jack, make the structural rigidity of both junctions obtain improving, the problem that current folding coupling assembling is not suitable for the great aircraft of weight has been solved.

Through set for the cross-section on the portion of inserting to semicircular bolt portion to make it and cross-section be the cooperation of semicircular jack main part, thereby improve radial ascending connection accuracy, avoid having spaciousness between the two, can also avoid the portion of inserting to follow circumferential direction in the jack simultaneously, thereby realize first connecting piece and second connecting piece at radial and ascending stable connection in week.

Drawings

Fig. 1 is a schematic structural view of a folding arm in an embodiment of the present invention in an unfolded state;

fig. 2 is a schematic structural view of a folding arm in a folded state according to an embodiment of the present invention;

FIG. 3 is a schematic view of a part of the folding arm of the embodiment of the present invention in a folded state;

fig. 4 is a schematic structural view of a first connecting member according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a second connecting member according to an embodiment of the present invention;

FIG. 6 is a side view of a second connector in an embodiment of the invention;

fig. 7 is a schematic structural diagram of a grooved cam according to an embodiment of the present invention;

FIG. 8 is a schematic view of a wrench according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a locking spring in an embodiment of the present invention.

In the figure:

1. a first arm; 2. a second arm;

3. folding the connecting assembly;

31. a first connecting member; 311. a jack; 3111. a main body portion; 3112. connecting grooves; 312. a second limiting surface;

32. a second connecting member; 321. a plug pin portion; 322. a sliding connection portion; 3221. a sliding part; 3222. a pivot part; 323. a first limiting surface;

33. locking the convex;

34. a grooved cam; 341. an opening part; 342. a locking portion; 343. a stopper portion;

35. a wrench; 351. clamping convex;

36. a locking spring plate; 37. a second pivot shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

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.

Referring to fig. 1 to 9, the present embodiment discloses a folding connecting assembly 3, which can be applied to various fields of folding arms, folding tables and chairs, folding beds, etc. of aircrafts to connect a first folding arm and a second folding arm that can be folded relatively. The present embodiment is described by taking as an example that the folding joint assembly 3 is used for a folding horn of an aircraft.

Fig. 1 is a schematic structural diagram of a folding arm in an embodiment of the present invention in an unfolded state; fig. 2 is a schematic structural view of a folding arm in a folded state according to an embodiment of the present invention; fig. 3 is a schematic view of a part of the folding arm in a folded state according to an embodiment of the present invention. Referring to fig. 1-3, the folding horn may comprise a first horn 1 and a second horn 2, wherein the first horn 1 and the second horn 2 may be connected by a folding joint assembly 3, i.e. in this embodiment, the first horn 1 corresponds to a first folding horn and the second horn 2 corresponds to a second folding horn. The folding arm can be folded and unfolded under the action of the folding connecting component 3. Specifically, the folding connection assembly 3 may include a first connection member connectable to the first horn 1, a second connection member connectable to the second horn 2, and a locking assembly capable of locking the first and second horns 1 and 2 in the unfolded state.

Fig. 4 is a schematic structural diagram of a first connecting member 31 according to an embodiment of the present invention; fig. 5 is a schematic structural view of a second connecting member 32 according to an embodiment of the present invention; fig. 6 is a side view of a second connector 32 according to an embodiment of the invention. Referring to fig. 4-6, the first connecting member 31 is provided with an insertion hole 311, the insertion hole 311 is provided with a first pivot shaft, and the axis of the first pivot shaft is perpendicular to the unfolding direction of the first arm 1 and the second arm 2; correspondingly, the second connecting piece 32 is provided with an inserting part which can be matched with the jack 311, the inserting part is pivoted with the first connecting piece 31 through a first pivoting shaft, the inserting part can rotate around the first pivoting shaft along the first direction in the positive direction to realize the alignment of the inserting part and the jack 311, and correspondingly, the first connecting piece 31 and the second connecting piece 32 can rotate and fold along the first direction in the reverse direction; and the insertion portion can slide in or out of the insertion hole 311 in a second direction after it is aligned with the insertion hole 311. In addition, the locking assembly can lock the insertion portion in the insertion hole 311, thereby achieving locking of the first and second arms 1 and 2 in the unfolded state.

Set up jack 311 on the first connecting piece 31 through making the connection first horn 1, set up on the second connecting piece 32 of connecting second horn 2 can with jack 311 complex insertion part, wherein first connecting piece 31 and second link are through the pin joint of first pin joint axle, the collapsible connection of first horn 1 and second horn 2 has been realized, and simultaneously, when first horn 1 and second horn 2 are the state of expanding, insertion part can insert in jack 311, make the structural rigidity of both junctions obtain improving, the problem that current folding coupling assembling is not suitable for the great aircraft of weight has been solved.

Specifically, referring to fig. 5 and 6, the insertion portion may include a plug pin portion 321 and a sliding connection portion 322 connected to the plug pin portion 321, and the plug pin portion 321 may be used to cooperate with the plug hole 311, improving structural rigidity of the first and second horn 1 and 2 when they are unfolded; the sliding connection 322 may be used to keep the first and second arms 1 and 2 connected when they are folded. Optionally, the sliding connection portion 322 is provided with a sliding slot, the first pivot shaft penetrates through the sliding slot, and the sliding slot can slide along the second direction relative to the first pivot shaft to drive the plug pin portion 321 to slide into the plug hole 311 or separate from the plug hole 311. Further, in order to enable the insertion portion of the second connection member 32 to rotate relative to the first connection member 31 after sliding out of the insertion hole 311 to achieve folding of the two, the sliding groove may include a sliding portion 3221 and a pivoting portion 3222, wherein the length of the sliding portion 3221 is the same as that of the latch portion 321 along the axial direction thereof; the pivoting portion 3222 is collinear with the sliding portion 3221 and extends in a direction parallel to the axis of the pin portion 321, and the pivoting portion 3222 is configured to abut against the first pivot shaft and rotate the second connecting member 32 around the first pivot shaft. By providing the pivoting portion 3222 protruding the end surface of the plug pin portion 321, the plug pin portion 321 can slide into the insertion hole 311 while aligning with the insertion hole 311, and can be separated from the insertion hole 311 by sliding, the plug pin portion 321 can be prevented from interfering with the insertion hole 311.

Further optionally, at least one end of the sliding connection portion 322 along a direction parallel to the axis of the first pivot shaft is provided with a first limiting surface 323, at least one end of the insertion hole 311 along a direction parallel to the axis of the first pivot shaft is provided with a second limiting surface 312, and the first limiting surface 323 and the second limiting surface 312 abut against each other to limit the insertion portion from rotating in the insertion hole 311.

Specifically, in this embodiment, referring to fig. 4-6, the insertion hole 311 includes a main body 3111 engaged with the insertion pin portion 321 and a connection groove 3112 engaged with the sliding connection portion 322, the first pivot shaft is disposed in the connection groove 3112, wherein the cross section of the main body 3111 is similar to a semicircle, correspondingly, the cross section of the insertion pin portion 321 is similar to a semicircle of the cross section of the main body 3111, the semicircle of the main body 3111 is engaged with the semicircle of the insertion pin portion 321, so that the first arm 1 and the second arm 2 can be radially fixed in the unfolded state, and because the insertion pin portion 321 of the structure has a larger structural size and can be tightly engaged with the main body 3111, the connection with high strength and high precision can be achieved, and the situation that the post-folding arm vibrates during operation due to the existence of an allowance between the insertion portion and the insertion hole 311 is avoided; meanwhile, the insertion part can be prevented from rotating in the circumferential direction in the clamping hole, so that the first connecting piece 31 and the second connecting piece 32 are stably connected in the radial direction and the circumferential direction; the cross section of connecting groove 3112 is similar to the rectangle, correspondingly, the profile of sliding connection portion 322 is rectangular form, its cross section is similar to the rectangle of connecting groove 3112 cross section, make sliding connection portion 322 all be provided with first spacing face 323 along the both ends of parallel with first pin joint axle axis direction, connecting groove 3112 all is provided with the spacing face 312 of second along the both ends of being parallel with first pin joint axle axis direction, the first spacing face 323 of both sides and the spacing face 312 of second of both sides butt respectively one by one, thereby further restricted the rotation of inserting portion in jack 311. Optionally, the first position-limiting surface 323 and the second position-limiting surface 312 are flat surfaces. Meanwhile, the first limiting surface 323 and the second limiting surface 312 can also play a guiding role when the insertion part is inserted into the insertion hole 311 in a sliding manner along the second direction.

In addition, the sliding groove in the sliding connection portion 322 is a through groove, one of the two second limiting surfaces 312 of the connecting groove 3112 is provided with a threaded hole, the other one of the two second limiting surfaces is provided with a through hole, a screw is selected for the first pivot shaft, and one end of the screw sequentially penetrates through the through hole of the connecting groove 3112 and the sliding groove of the sliding connection portion 322 and then is connected with the threaded hole of the connecting groove 3112, so that the first connection member 31 and the second connection member 32 are connected.

Wherein, referring again to fig. 3, the locking assembly may include a locking protrusion 33 disposed on the second connecting member 32 and a grooved cam 34 rotatably disposed on the first connecting member 31 via a second pivot shaft 37, the locking protrusion 33 being capable of cooperating with the grooved cam 34 to lock the first and second booms 1 and 2 in the unfolded state. It is understood that the second pivot shaft 37 may be disposed outside the first connecting member 31 and not extend into the insertion hole 311. Optionally, the second pivot shaft 37 is parallel to the first pivot shaft, the locking protrusion 33 extends in a direction parallel to the first pivot shaft, and the grooved cam 34 can rotate forward in the first direction to lock the first connecting member 31 and the second connecting member 32. Specifically, fig. 7 is a schematic structural diagram of a grooved cam 34 according to an embodiment of the present invention. Referring to fig. 7, the groove-shaped cam 34 includes an opening portion 341 and a locking portion 342 which are communicated with each other, the locking portion 342 is an arc-shaped groove, one end of the arc-shaped groove is communicated with the opening portion 341, the other end is provided with a stopping portion 343, wherein the locking protrusion 33 can enter the opening portion 341 along the second direction, and the locking portion 342 can rotate around the second pivot shaft 37 to make the stopping portion 343 abut against the locking protrusion 33. Because the axial displacement of the locking protrusion 33 is small in the rotation process of the grooved cam 34, a large axial acting force is generated, so that the folding machine arm in the unfolding state is firmly fixed in the axial direction, and the grooved cam 34 has a certain self-locking characteristic, so that the connection reliability of the first machine arm 1 and the second machine arm 2 is further ensured. In order to ensure that the first connecting piece 31 and the second connecting piece 32 can be uniformly stressed when the locking assembly is locked, the selectable locking assembly comprises two locking protrusions 33 and two grooved cams 34, the two grooved cams 34 are symmetrically arranged on the first connecting piece 31, and the two locking protrusions 33 are symmetrically arranged on the second connecting piece 32.

In addition, referring to fig. 3, in order to facilitate the rotation of the grooved cam 34 and thus the locking of the first arm 1 and the second arm 2, a wrench 35 may be optionally provided on the grooved cam 34, one end of the wrench 35 is connected to the grooved cam 34, and the other end is a driving portion that a user can manually drive the wrench 35 to rotate. The connection of the wrench 35, the grooved cam 34 and the second pivot shaft 37, like the lever principle, achieves that the first arm 1 and the second arm 2 in the unfolded state are locked in the axial direction under the action of a small force. Wherein the wrench 35 can be designed separately from the grooved cam 34 or can be formed integrally with the grooved cam 34. In the present embodiment, the wrench 35 and the grooved cam 34 are designed separately to reduce the difficulty of machining. Specifically, optionally, fig. 8 is a schematic structural diagram of a wrench 35 in an embodiment of the present invention. Referring to fig. 8, the wrench 35 is provided with a catching protrusion 351 at a side facing the groove cam 34; the groove-shaped cam 34 is provided with a clamping groove on one side facing the wrench 35, and the clamping groove is matched with the clamping protrusion 351; the wrench 35 and the grooved cam 34 are connected to the first connecting member 31 through the second pivot shaft 37. The two convex ribs with included angles can be selected by the clamping protrusions 351, the wrench 35 and the groove-shaped cam 34 can be integrated after the clamping grooves on the groove-shaped cam 34 are matched with the convex ribs, and when the wrench 35 is driven to rotate, the groove-shaped cam 34 can be driven to rotate, so that the locking portion 342 adopting the arc-shaped groove can slide relative to the locking protrusion 33. In this embodiment, the L-shaped structure protrusion 351 can be processed more easily.

Further optionally, the wrench 35 further includes a fitting portion that can be fitted to the first arm 1, in addition to the clamping portion that is clamped to the grooved cam 34, wherein a structure of one side of the fitting portion that faces the first arm 1 can be matched with a structure of a portion of the first arm 1 that is fitted correspondingly. After the wrench 35 drives the grooved cam 34 to rotate forward in the first direction, the wrench 35 can finally abut against the first arm 1, and at this time, the locking protrusion 33 can abut against the stopping portion 343 in the locking portion 342.

Further optionally, in order to prevent the wrench 35 from loosening due to vibration and other factors of the first boom 1 and the second boom 2 during use, a locking portion capable of being connected to the first boom 1 is further provided at an end of the wrench 35 away from the second pivot shaft 37 in this embodiment. Wherein, the selectable anti-loosening part is an anti-loosening spring piece 36 matched with the cross section profile of the first machine arm 1. Fig. 9 is a schematic structural diagram of a locking spring 36 in an embodiment of the present invention. Referring to fig. 9, the locking spring 36 has an opening, and the locking spring 36 is configured to be connected to the first arm 1 through the opening and to hold the first arm 1 tightly, ensuring reliable connection. Preferably, the contour of the locking spring 36 matches the contour of the first arm 1. In this embodiment, the first arm 1 is a cylinder, and the locking spring 36 may have an open arc structure. Further preferably, the opening of the locking spring 36 is provided with a transition arc to avoid scratching the outer wall of the locking spring 36 when the locking spring is connected with or separated from the first boom 1.

Further alternatively, the first arm 1 and the first connecting member 31, and the second arm 2 and the second connecting member 32 may be integrally formed or may be separately assembled. In this embodiment, the first horn 1 and the first connecting member 31, and the second horn 2 and the second connecting member 32 may be connected by bonding or by pins, so that the difficulty of directly processing the folding connection assembly 3 on the first horn 1 and the second horn 2 can be reduced; on the other hand, the split machining of the folding connecting assembly 3 and the first machine arm 1 and the second machine arm 2 can be realized, so that the folding connecting assembly 3 can be used for other devices and mechanisms, and the universality of the folding connecting assembly 3 and the machining efficiency of the folding machine arm are improved.

In the aircraft, the weight of the structure has a great influence on the performance of the aircraft, and in this embodiment, the main large-sized components such as the first connecting piece 31, the second connecting piece 32, the wrench 35 and the like can be made of light materials such as aluminum alloy or magnesium alloy; only the locking protrusion 33 and the grooved cam 34 which have high requirements on wear resistance are made of steel materials, the locking spring piece 36 which has high requirements on elasticity is made of materials with high elasticity, and the folding connecting component 3 has low weight and long service life by reasonably arranging a structure and utilizing the materials.

In addition, the embodiment also discloses an aircraft which can comprise the folding horn. Wherein the aircraft can be specifically unmanned aerial vehicle or the like. By arranging the folding horn on an aircraft, it can be made to have a lower weight, a higher reliability and a longer service life.

Finally, to further understand the application of the folding joint assembly 3 provided in the present embodiment to the folding arm of an aircraft, the method of use thereof is described herein:

when the first and second arms 1 and 2 are changed from the folded state to the unfolded state:

the second arm 2 rotates around the first pivot shaft in the first direction until the insertion portion can align with the insertion hole 311;

pushing the insertion portion in the second direction to insert the insertion portion into the insertion hole 311, wherein the sliding slot in the insertion portion slides relative to the first pivot shaft, and the locking protrusion 33 also moves in the second direction toward the first arm 1;

next, the locking assembly starts to perform locking of the first arm 1 and the second arm 2 in the axial direction, at which time the opening portion 341 of the groove-shaped cam 34 faces the locking projection 33 in the second direction;

after the insertion portion is completely inserted into the insertion hole 311, the locking protrusion 33 has entered the opening portion 341 of the slot cam 34 and is located at the boundary between the opening portion 341 of the slot cam 34 and the locking portion 342;

the wrench 35 is driven to further drive the grooved cam 34 to rotate, so that the locking portion 342 slides relative to the locking protrusion 33 until the stopping portion 343 in the locking portion 342 abuts against the locking protrusion 33, at this time, the wrench 35 can just abut against the first arm 1, and the locking spring 36 is tightly held with the first arm 1. Meanwhile, the opening 341 faces upward and is perpendicular to the second direction.

When the first and second arms 1 and 2 are changed from the unfolded state to the folded state:

the spanner 35 is driven to rotate, so that the anti-loosening spring piece 36 is separated from the first machine arm 1, and meanwhile, the groove-shaped cam 34 is driven to rotate reversely along the first direction until the opening part 341 is parallel to the second direction;

the locking protrusion 33 is pulled to move out of the opening portion 341, so that unlocking is realized;

the insertion portion is also moved in the second direction out of the insertion hole 311;

after the plug pin portion 321 in the plug portion completely leaves the plug hole 311, the second connecting member 32 is bent downward around the first pivot axis in the first direction, so that the first connecting member 31 and the second connecting member 32 are folded.

In the description herein, it is to be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like are used in a descriptive sense and based on the orientation or positional relationship shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single technical solution, and such description is for clarity only, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that may be understood by those skilled in the art.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (12)

1. A folding connection assembly, comprising:

the folding device comprises a first connecting piece (31) and a second connecting piece (311), wherein the first connecting piece is used for connecting a first folding arm, one end of the first connecting piece (31) is provided with an insertion hole (311), the section of the insertion hole comprises a semicircular main body part (3111), and the insertion hole (311) is provided with a first pivot shaft perpendicular to the axis of the insertion hole;

the second connecting piece (32) is used for connecting the second folding arm, an inserting portion capable of being matched with the inserting hole (311) is arranged on the second connecting piece (32), the inserting portion comprises a plug pin portion (321) with a semicircular section and a sliding connecting portion (322) connected with the plug pin portion (321), the plug pin portion (321) is matched with the main body portion (3111), and the sliding connecting portion (322) is connected with the first connecting piece (31) through the first pivot shaft;

a locking assembly configured to be able to lock the insert in the receptacle (311).

2. The folding connection assembly of claim 1, wherein the locking assembly comprises:

a locking protrusion (33) provided on the second link (32);

and the groove-shaped cam (34) is rotatably arranged on the first connecting piece (31) through a second pivot shaft (37), and the locking protrusion (33) can be matched with the groove-shaped cam (34) to lock the first connecting piece (31) and the second connecting piece (32).

3. The folding-connection assembly according to claim 2, characterized in that the second pivot axis (37) is parallel to the first pivot axis, the locking projection (33) extending in a direction parallel to the first pivot axis; the grooved cam (34) can rotate positively in a first direction to lock the first connecting piece (31) and the second connecting piece (32).

4. The folding connection assembly according to claim 2, characterized in that the groove-shaped cam (34) comprises an opening portion (341) and a locking portion (342) which are communicated with each other, the locking portion (342) is an arc-shaped groove, one end of the arc-shaped groove is communicated with the opening portion (341), the other end is provided with a stopping portion (343), the groove-shaped cam (34) is configured such that the locking protrusion (33) can enter the opening portion (341) along the second direction, and the locking portion (342) can rotate around the second pivot shaft (37) to make the stopping portion (343) abut against the locking protrusion (33).

5. The folding-connection assembly according to claim 2, characterized in that said locking assembly comprises two locking tabs (33) and two grooved cams (34), the two locking tabs (33) being symmetrically arranged on said second link (32) and the two grooved cams (34) being symmetrically arranged on said first link (31).

6. A folding connection assembly according to any one of claims 2 to 5, characterized in that the grooved cam (34) is provided with a spanner (35).

7. The folding connection assembly according to claim 6, characterized in that the wrench (35) is provided with a snap projection (351) on the side facing the grooved cam (34);

the groove-shaped cam (34) is provided with a clamping groove on one side facing the wrench (35), and the clamping groove is matched with the clamping protrusion (351);

the wrench (35) and the grooved cam (34) are connected with the first connecting piece (31) through the second pivot shaft (37).

8. The folding-connection assembly according to claim 6, characterized in that the end of the wrench (35) remote from the second pivot axis (37) is further provided with a locking portion, which can be connected with the first folding arm.

9. The folding connection assembly of claim 8, wherein the locking portion is a locking spring (36) that fits the cross-sectional profile of the first folding arm, the locking spring (36) having an opening, the locking spring (36) being configured to connect with the first folding arm through the opening and to clasp the first folding arm.

10. The folding and connecting assembly according to claim 1, wherein the sliding connecting portion (322) is provided with a sliding slot, the first pivot shaft is disposed in the sliding slot, and the sliding slot is slidable in a second direction relative to the first pivot shaft.

11. The folding connection assembly of claim 10, wherein the chute includes:

a sliding portion (3221), the length of the sliding portion (3221) being the same as the length of the plug pin portion (321) in the axial direction thereof;

a pivoting part (3222) which is collinear with the sliding part (3221) and extends in a direction parallel to the axis of the plug pin part (321), wherein the pivoting part (3222) is configured to abut against the first pivoting shaft and rotate the second connecting piece (32) around the first pivoting shaft.

12. The folding and connecting assembly according to claim 10, wherein the sliding connecting portion (322) is provided with a first limiting surface (323) along at least one end parallel to the axial direction of the first pivot shaft, the insertion hole (311) is provided with a second limiting surface (312) along at least one end parallel to the axial direction of the first pivot shaft, and the first limiting surface (323) and the second limiting surface (312) are abutted to limit the insertion portion from rotating in the insertion hole (311).

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