CN106476866A - A kind of double leval jib retaining mechanism and its application - Google Patents
A kind of double leval jib retaining mechanism and its application Download PDFInfo
- Publication number
- CN106476866A CN106476866A CN201510828951.2A CN201510828951A CN106476866A CN 106476866 A CN106476866 A CN 106476866A CN 201510828951 A CN201510828951 A CN 201510828951A CN 106476866 A CN106476866 A CN 106476866A
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- Prior art keywords
- bar
- rod
- assembly
- folding
- frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B3/00—Folding or stowable tables
- A47B3/002—Folding or stowable tables with foldable underframe
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C4/00—Foldable, collapsible or dismountable chairs
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Tents Or Canopies (AREA)
Abstract
The invention provides a kind of double leval jib retaining mechanism and application, including two link assemblies, at least one middle part double leval jib component and symmetrically arranged end double leval jib component；One pin joint of the end double leval jib component is connected with a pin joint of the middle part double leval jib component；One pin joint of the end double leval jib component is flushed with two link assembly and hinged with the end of two link assembly.In the present invention, three groups of double leval jib components are after two link assemblies are locked, Stability Analysis of Structures, support strength are big, simultaneously, application double leval jib retaining mechanism of the present invention is used as folding stand, can not only lightly be linked folding, save floor space, it is readily transported and carries, and support after stiffness and toughness all stronger, the safety coefficient of folded frame is improve, additionally, folded bicycle, seat, desk, school bag and umbrella are effectively combined by the present invention, become and camp and the outdoor instrument for using, with stronger practicality.
Description
Technical Field
The invention relates to the technical field of mechanical locking mechanisms, in particular to a four-connecting-rod locking mechanism and application thereof.
Background
As is known, the link mechanisms are widely used in various mechanical devices, such as appliances, articles, etc., by which the intended actions and purposes are achieved, in particular in foldable seating, bedding and outdoor furniture.
At present in various handcart, the hand buggy of outdoor usefulness, most all can not realize folding, and these handcart or hand buggy are cordwood system or half cordwood system structure mostly, and not only the usage is single, can not realize the full linkage, and the volume is on the large side moreover, and the dead weight is on the large side, carries inconveniently, especially uses it to in domestic vehicle or the civilian vehicle, and above-mentioned defect more shows prominently, and for this reason, people's urgent need design one kind can realize the folding of full linkage, light and handy and convenient to carry's folding car.
Disclosure of Invention
The invention provides a truss structure applying a four-connecting-rod locking mechanism, which can realize quick assembly, folding and transportation of a frame in a handcart or a hand buggy and ensure that the assembled frame structure has stronger rigidity and strength.
The specific technical scheme of the invention is as follows:
the invention provides a four-connecting-rod locking mechanism which comprises two connecting rod assemblies, at least one middle four-connecting-rod assembly and end four-connecting-rod assemblies symmetrically arranged at two sides of the middle four-connecting-rod assembly; wherein,
the end part four-connecting-rod assembly is formed by hinging 4 first connecting rods; the middle four-connecting-rod assembly is of a diamond structure formed by hinging 4 second connecting rods end to end; the two connecting rod assemblies are formed by hinging 2 third connecting rods with equal length;
one hinge point of the end four-bar linkage assembly is connected with one hinge point of the middle four-bar linkage assembly; the hinge point on the two-connecting-rod assembly is positioned on the central line of the middle four-connecting-rod assembly; one hinge point of the end four-bar linkage assembly is hinged to the end of the two-bar linkage assembly.
Furthermore, the position of the hinge point of the middle part of the two-connecting-rod assembly is lower than the position of the hinge point of the middle part of the two-connecting-rod assembly and the position of the hinge point of the end part four-connecting-rod assembly.
Furthermore, the bottom of the middle four-link assembly is connected with a cross rod, and a hinge point in the middle of the two-link assembly is abutted to the cross rod.
Furthermore, two first connecting rods and two second connecting rods at the connecting positions of the end part four-connecting-rod assembly and the middle part four-connecting-rod assembly are in a cross shape, and the first connecting rods and the second connecting rods which are arranged in the same direction are connected into one rod.
The invention also provides application of the four-connecting-rod locking mechanism in folding carts, chairs and tables.
The invention also provides a folding vehicle applying the four-connecting-rod locking mechanism, which comprises a folding frame, wheels arranged at the bottom of the folding frame and a table plate arranged at the top of the folding frame; the folding frame comprises at least two four-connecting-rod locking mechanisms, and two ends and the bottoms of the adjacent four-connecting-rod locking mechanisms are connected through a plurality of connecting rods;
the table plate comprises at least two jointed plates, and the two jointed plates are hinged or not connected with each other.
Furthermore, the two connecting rod assemblies are connected through the connecting rods to form a bottom frame, the first connecting rods longitudinally arranged on the end four connecting rod assemblies are connected through the connecting rods to form an end frame, and the wheels are arranged at the bottom of the end frame.
Furthermore, the folding bicycle is further provided with a supporting four-bar connecting rod assembly, the supporting four-bar connecting rod assembly is formed by hinging a first bar, a second bar, a third bar and a fourth bar, one end of the first bar is hinged to a hinged joint of the end frame and the bottom frame, the other end of the first bar is connected with one end of the second bar, the fourth bar is vertically fixed at the bottom of the end frame, the end of the fourth bar extends out of the bottom frame, the other end of the second bar is hinged to one end of the fourth bar, one end of the third bar is hinged to the fourth bar, and the other end of the third bar is a free end.
Furthermore, a U-shaped fence is arranged on the end frame, and the end parts of two side walls of the U-shaped fence are respectively connected with first connecting rods which are arranged on the four-connecting-rod locking mechanisms and are adjacent to the top of the end part four-connecting-rod assembly on the four-connecting-rod locking mechanism in a transverse mode to form a rod.
Further, still be equipped with the umbrella on this folding car, be equipped with the jack on the table, the umbrella pole bottom of umbrella passes jack and end connection are used for the support piece stably fixed in ground, the umbrella pole top is equipped with the sunshade, sunshade bottom edge one side is equipped with the sunshade that shelters from slope sunshine, sunshade bottom edge opposite side is equipped with provides the extra umbrella lamella band of hiding.
The invention has the following beneficial effects: the four-connecting-rod locking mechanism provided by the invention can be used as a truss supporting structure, is convenient to use and fold, can be applied to multiple fields, such as sliding doors, chairs, tables, foldable trolleys and the like, is reasonable in design, has stable structure after being locked by at least three groups of four connecting rod assemblies through two connecting rod assemblies, has high rigidity and high supporting strength, and can achieve the using effects of convenience in use, linkage, lightness and stability.
Drawings
FIG. 1 is a developed view of a four-bar linkage lock mechanism according to embodiment 1;
FIG. 2 is a folded state view of a four-bar linkage lock mechanism according to embodiment 1;
FIG. 3 is an enlarged view of A in FIG. 1;
FIG. 4 is a perspective view of a frame of a four-bar linkage locking mechanism according to embodiment 2;
FIG. 5 is a structural view of a folding cart to which the four-bar locking mechanism is applied according to embodiment 4;
FIG. 6 is a first perspective view of a foldable wagon using the four-bar linkage locking mechanism according to embodiment 4;
FIG. 7 is a schematic perspective view of a foldable car using the four-bar linkage locking mechanism according to embodiment 5
FIG. 8 is a schematic view showing a folding state of a folding cart to which the four-bar linkage locking mechanism is applied according to embodiment 5;
FIG. 9 is an enlarged partial view of an end frame of a folding cart to which the four-bar linkage locking mechanism is applied, according to embodiment 5, and mainly shows a structure for supporting the four-bar linkage assembly;
fig. 10 is a front view of a folding cart to which the four-bar locking mechanism is applied according to embodiment 5.
Wherein: 1. a two-link assembly; 101. a third link; 2. a middle four-bar linkage assembly; 201. a second link; 202. a cross bar; 3. an end four-bar linkage assembly; 301. a first link; 4. folding the frame; 5. a wheel; 6. a table plate; 601. a jack; 7. a connecting rod; 8. a first lever; 9. a second lever; 10. a third lever; 11. a fourth bar; 12. a U-shaped fence; 13. an umbrella; 131. an umbrella rod; 132. a support member; 133. a sun shade; 134. a sun-shading cloth; 135. the umbrella is flanged with umbrella petals.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings.
Example 1
As shown in fig. 1 or 2, embodiment 1 of the present invention provides a four-bar locking mechanism, which is mainly used to describe that a set of two-bar linkage assembly mechanisms is used to lock three (not limited to three) sets of four-bar linkage assembly mechanisms in this technical solution, so as to form a truss assembly that can be folded and unfolded in a linkage manner.
The four-connecting-rod locking mechanism comprises a two-connecting-rod assembly 1, at least one middle four-connecting-rod assembly 2 and end four-connecting-rod assemblies 3 symmetrically arranged at two sides of the middle four-connecting-rod assembly 2; wherein,
the end part four-connecting-rod assembly 3 is formed by hinging 4 first connecting rods 301; the middle four-connecting-rod assembly 2 is of a diamond structure formed by hinging 4 second connecting rods 201 end to end; the two-link assembly 1 is formed by hinging 2 third connecting rods 101 with equal length, and the 2 third connecting rods 101 with equal length are connected through hinges;
one hinge point of the end four-bar linkage assembly 3 is connected with one hinge point of the middle four-bar linkage assembly 2; the hinge point on the two-link assembly 1 is positioned on the central line of the middle four-link assembly 2; one of the hinge points of the end four-bar linkage assembly 3 is hinged to the end of the two-bar linkage assembly 1.
In a simple way, if the 4 first connecting rods 301 of the end four-link assembly 3 are respectively an a connecting rod, a B connecting rod, a C connecting rod and a D connecting rod, if the 4 second connecting rods 201 of the middle four-link assembly 2 are respectively an E connecting rod, an F connecting rod, a G connecting rod and an H connecting rod, if the hinge point of the C connecting rod and the D connecting rod is connected with the hinge point of the E connecting rod and the H connecting rod, the hinge point of the D connecting rod and the a connecting rod is hinged with the end of the two-link assembly, and the hinge point of the E connecting rod and the F connecting rod, the hinge point of the G connecting rod and the H connecting rod and the hinge point of the.
Two hinge points on the middle four-bar linkage assembly 2, except for the hinge point connected with the two end four-bar linkage assemblies 3, are connected through a hinge, and the two hinge points are both positioned on the central line of the middle four-bar linkage assembly 2.
When the locking mechanism is specifically implemented, the number of the middle four-bar connecting rod assemblies 2 can be increased according to different application fields, and the number can be increased or decreased according to the length of the used locking mechanism.
Because the locking mechanism provided by the invention has the structural characteristics of folding and stable locking, the mechanism can be used in various fields of truss structure application, such as electric power trusses, object supporting bases and other mechanisms needing to be folded.
Can lock multiunit four link assembly simultaneously through using a set of two link assembly 1 among this technical scheme, thereby make and form a locking mechanism who expandes the state between the whole four link assembly, and make these member become stable truss structure, so whole truss structure's rigidity, intensity is high, can use the truss structure that this four link locking structure is constituteed in a plurality of fields, 3 groups of four link assembly can be linked through folding of two link assembly 1 certainly, thereby form fold condition, the truss structure after folding not only occupation space, and be convenient for transport, have very strong practicality.
As shown in fig. 3, in specific use, when the middle hinge point X of the two link assemblies abuts against the hinge Y at the bottom of the middle four link assembly, the two triangular structures composed of the hinge points PSX and QRX are formed in the truss structure composed of the two link assemblies and the at least three groups of four link assemblies, so that the truss structure becomes an extremely stable structure, and when the middle hinge point X of the two link assemblies moves upward under the action of external force, the truss assembly can be folded, that is, unlocked.
Example 2
The embodiment of the invention provides a four-bar locking mechanism, and the embodiment 2 further limits the structure of the four-bar locking mechanism on the basis of the embodiment 1, so that the connection stability and the connection safety of the four-bar locking mechanism are improved.
As shown in fig. 3 and 4, the present invention further defines that the position of the hinge point of the middle portion of the two-link assembly 1 is lower than the position of the hinge point of the end portion four-link assembly 3. The bottom of the middle four-link assembly 2 is connected with a cross rod 202, and a hinge point at the middle of the two-link assembly 1 is abutted to the cross rod 202.
The two connecting rod assemblies 1 have three rotation centers, and the rotation center of the middle part is lower than the rotation centers of the two sides, so when the four-connecting rod locking mechanism is folded, the component force received on the two connecting rod assemblies 1 is necessarily horizontal, so that the two connecting rod assemblies 1 are inevitably formed into two torques, the left third connecting rod 101 is clockwise, the right third connecting rod 101 is anticlockwise, the three four-connecting rod assemblies have a more stable function, the three four-connecting rod assemblies can be locked by the structure, certainly, in order to ensure the stability and the firmness of the two connecting rod assemblies 1, the technical scheme limits that the position, close to the hinge point Y at the middle part of the two connecting rod assemblies 1, of the middle four connecting rod assembly 2 is provided with the cross rod 202, the cross rod 202 can be fixed on the hinge point Y at the bottom of the middle four connecting rod assembly 2, and also can, the hinge point X in the middle of the two-link assembly 1 is abutted against the cross rod 202, so that the cross rod 202 is designed to position the two-link assembly 1, the two-link assembly 1 is automatically locked, the automatic contraction of the two-link assembly 1 is prevented, and the safety of the four-link locking mechanism is ensured.
As shown in fig. 3 and 5, preferably, two first links 301 and two second links 201 at the connection of the end four-link assembly 3 and the middle four-link assembly 2 are cross-shaped, and the first links 301 and the second links 201 arranged in the same direction are connected into one rod. That is to say, if 4 first connecting rods 301 of the end portion four-bar linkage assembly 3 are respectively an a connecting rod, a B connecting rod, a C connecting rod and a D connecting rod, if 4 second connecting rods 201 of the middle portion four-bar linkage assembly 2 are respectively an E connecting rod, an F connecting rod, a G connecting rod and an H connecting rod, if a hinge point of the C connecting rod and the D connecting rod is connected with a hinge point of the E connecting rod and the H connecting rod, the C connecting rod and the H connecting rod are arranged in the same direction and are fixedly connected into a rod, the D connecting rod and the E connecting rod are arranged in the same direction and are fixedly connected into a rod, two rod crosses form a cross rod assembly, the two cross rods are rotatably connected, and a hinge point position.
Example 3
The invention also provides application of the four-connecting-rod locking mechanism in folding carts, chairs and tables.
The four-bar locking mechanism provided by the invention can be a stable truss structure, can exert the self stability and high-strength supporting function by applying the four-bar locking mechanism to different fields and auxiliary structures, can be designed into different products, and has wide application fields.
Example 4
Compared with the existing folding bicycle, the folding bicycle adopting the four-bar locking mechanism has the advantages that the folding bicycle is quick and light, the space area is saved, the carrying is convenient, the structure is simple, the appearance is attractive, the rigidity and the strength are high, the stability is high, the folding bicycle is suitable for containing articles or being used as a baby carriage, and the safety coefficient is high.
As shown in fig. 6, the invention further provides a folding cart applying the four-bar linkage locking mechanism, which comprises a folding frame 4, wheels 5 arranged at the bottom of the folding frame 4, and a table 6 arranged at the top of the folding frame 4; the folding frame 4 comprises at least two four-bar locking mechanisms, and two end parts and the bottoms of the adjacent four-bar locking mechanisms are connected through a plurality of connecting rods 7; the folding frame 4 can realize the switching between the unfolding and the folding of the vehicle through a four-bar locking mechanism, and when the folding frame 4 is in the unfolding position, the top of the folding frame 4 is provided with an opening and can form a vehicle cabin for loading articles.
The table 6 comprises at least two panels, which are hinged or not connected to each other. The table board 6 can be composed of two jointed boards or a plurality of jointed boards, and can be used only by being arranged in parallel, and the jointed boards can be hinged or not connected and can be directly jointed together. When the table plate 6 needs to be used, the table plate 6 is taken out, and the two jointed boards are unfolded and laid on the folding frame 4.
Preferably, the table 6 is a plate made of metal and having table edges, and the edges of the table 6 extend downward so that the edges of the table 6 cover and are clamped on top of the folding frame 4, thereby being locked to the folding frame 4.
Because the middle four-bar linkage assembly 2 in the four-bar linkage locking mechanism can be properly increased according to different use fields, the number of the middle four-bar linkage assembly 2 in the four-bar linkage locking mechanism can be properly increased according to the size of a vehicle in specific implementation.
It should be emphasized that the folding frame of the present invention adopts a truss structure formed by locking three groups of four connecting rod assemblies by two connecting rod assemblies, and the truss structure has the advantages that the folding and the unfolding can be realized in a full linkage manner, the operation and the use of the folding frame are very convenient and easy, and the ratio of the volume of the folding frame when the folding frame is unfolded to the volume of the folding frame when the folding frame is folded can be 4: 1. The folded frame is folded to be small in size and convenient to store, and a stable truss structure is formed when the folded frame is used, so that the folded frame is applied to a vehicle body, the rigidity and the strength of the vehicle body can be better, the folded frame can be made of thinner and lighter materials during manufacturing and production, for example, thin-walled tubes made of carbon steel, the weight of the vehicle body after production is lighter and the folded frame is convenient to carry, if the thin-walled tubes made of carbon steel are used for production, the weight of the vehicle body of the folded vehicle can reach 31.5 pounds, if the thin-walled tubes made of aluminum alloy are used, the weight of the vehicle body made of the folded frame can be lighter, and the total bearing capacity of the vehicle body can reach more than 200 pounds.
The invention discloses a folding bicycle, which is provided with a table plate 6 and an umbrella 13, is matched with a folding chair when in use, and can also contain articles in the folding bicycle.
The embodiment of the invention can also be provided with a folding stool or a folding chair matched with the folding vehicle for use, the folding stool or the folding chair comprises a folding base and a chair surface, the folding base is composed of the four-bar locking mechanism, the folding base is similar to the folding frame 4 structure designed in the invention, and the folding chair can be designed into different structures according to different use environments, such as beach or lawn, square and harder road surfaces. The chair can be folded like the structure of the folding vehicle provided by the invention, is convenient to transport and assemble, and has strong supporting force and convenient use.
The folding cart of the present invention is further provided with a heat-insulating fabric cover attached to the folding frame 4 by velcro or the like, the fabric cover having a UV finish, the fabric cover being structurally adapted to said folding frame 4, the fabric cover preferably being designed with a heat-insulating cover to cover the opening of the folding frame 4, said fabric cover cooperating with said table 6 to accommodate food, such as cold drinks, ice, food, etc., within the folding frame 4.
The folding trolley designed by the invention overcomes the defects that the existing trolley in the market has single function, can not be used as a camping dining trolley except for containing articles or being used for children to sit, and can not be used as a dining table, and meanwhile, the existing trolley can not be folded, so that the transportation of the trolley is troublesome and difficult sometimes under the influence of space limitation in the automobile, so that the existing trolley is only used in cities and can not be used for field travel, and the like.
The folding bicycle provided by the invention can be used for intensively designing 5 structures such as a bicycle body, a seat, a desk, a case, an umbrella and the like on the bicycle body of the folding bicycle, the bicycle body structure can be used for camping such as a beach, a lawn, a soft land, a garden and the like, and the bicycle body can be independently used such as shopping, goods transportation and the like, even can be used for children to sit when necessary, and the application range is wide.
Example 5
The embodiment of the invention provides a folding bicycle with the four-bar linkage locking mechanism, and the embodiment 5 further limits the structure of the folding bicycle on the basis of the embodiment 4, so that the versatility of the folding bicycle is improved.
As shown in fig. 7, it should be explained that the two-link assembly 1 is connected by the connecting rod 7 to form a bottom frame, the first connecting rods 301 longitudinally arranged on the end four-link assembly 3 are connected by the connecting rod 7 to form an end frame, and the wheel 5 is arranged at the bottom of the end frame.
Wheel 5 includes two front wheels and two rear wheels, and front wheel and rear wheel are fixed respectively in the end frame bottom that two symmetries set up, and the width of wheel 5 is designed according to the demand, can be applicable to sand ground walking, also can design and be applicable to ordinary road surface driving, and in order to fold, the length of bracing piece on the design underframe, makes the interval between two front wheels be greater than interval between two rear wheels, so that two rear wheels after folding can hold and two front wheels between, thereby reduce folding volume, save the area of folding car, vice versa, if design for two front wheels can hold between two rear wheels also can, as long as can be in the same place with wheel 5 after folding.
As shown in fig. 8 or 9, it should be emphasized that the folding cart is further provided with a supporting four-bar linkage assembly, the supporting four-bar linkage assembly is formed by hinging a first bar 8, a second bar 9, a third bar 10 and a fourth bar 11, one end of the first bar 8 is hinged to a hinged point where the end frame is connected with the bottom frame, the other end of the first bar 8 is connected with one end of the second bar 9, the fourth bar 11 is vertically fixed at the bottom of the end frame and the end of the fourth bar extends out of the bottom frame, the other end of the second bar 9 is hinged with one end of the fourth bar 11, one end of the third bar 10 is hinged with the fourth bar 11, and the other end of the third bar 10 is a free end.
When the folding frame 4 is in a folding state, the free end of the third rod 10 contacts the ground and supports the folding cart together with the rear wheel 5, so that the folding cart can stand, when the folding frame 4 is in an unfolding state, the third rod 10 is automatically positioned at an included angle with the fourth rod 11, the included angle is an acute angle, and the third rod 10 is used for supporting the folded table 6.
As shown in fig. 7, further, a U-shaped rail 12 is disposed on the end frame, and two side wall ends of the U-shaped rail 12 are respectively connected to a first connecting rod 301 disposed transversely at the top of the end four-link assembly 3 on the adjacent four-link locking mechanism to form a rod.
When the table 6 is not used, the table 6 can be put into the U-shaped rail 12 after being folded, or put into the vehicle of the folding frame 4, the third rod 10 is used for supporting the bottom of the table 6, the table 6 cannot fall off, and meanwhile, the U-shaped rail 12 limits the left, right, back, front and back movement of the table 6, so that the stability of the table 6 is ensured, and the folding vehicle is prevented from being lost in the pushing process.
As shown in fig. 10, it should be noted that the present invention further defines the structure of the folding cart with the umbrella 13 on the basis of embodiment 1, and also defines the specific structure of the umbrella 13, thereby making the folding cart more suitable for camping. Still be equipped with umbrella 13 on this folding car, be equipped with jack 601 on the table 6, jack 601 can set up on one of them makeup, also can set up in two makeup joint gaps department, and it mainly plays the effect of grafting umbrella pole 131, lies in on the folding frame 4 the jack 601 below is equipped with umbrella pole rail, has guaranteed umbrella 13's support stability. The bottom end of the umbrella rod 131 of the umbrella 13 penetrates through the insertion hole 601 and the end part is connected with the supporting piece 132 for being stably fixed on the ground, the top of the umbrella rod 131 is provided with the sunshade 133, the sunshade 133 can be provided with a ventilation opening for ventilation, and the sunshade 133 can be designed to be round or square according to the use requirement; a sunshade cloth 134 for shielding inclined sunlight is disposed at one side of the bottom edge of the sunshade 133, a flap trim 135 for providing additional shielding is disposed at the other side of the bottom edge of the sunshade 133, and the length of the sunshade cloth 134 is greater than that of the flap trim 135.
In addition, the umbrella shaft 131 may be a two-body structure, the upper part of the umbrella shaft 131 may be connected to the two-body structure by a holder, the supporting member 132 at the bottom end of the umbrella shaft 131 may be made into a spike inserted into the soil, a shovel inserted into the snow, or a screw rotated into the sand, so as to fix the umbrella 13 on the ground, the lower part of the umbrella shaft 131 is preferably held in the insertion hole by an elastic bushing or washer, and the umbrella shaft 131 may be rotated in the insertion hole, so that the sunshade cloth 134 is adapted to different directions, thereby better shielding the sunlight.
The table board 6 can be used for entertaining family and friends at the side of a table, so that a user can have dinner, play chess and card games and the like on the table board 6, the user can support the umbrella 13 when the sunshine is strong or the user rains, food, articles and the like can be stored in the folding vehicle, and the folding vehicle can be folded when the sunshine is not suitable.
Specially designed, the table board 6 can be decorated with a chess board, a mahjong table, a double-land chess board or other board games through screen printing, and in addition, the umbrella 13 and the folding frame 4 can have non-functional decorative designs matched with the board games.
When the folding vehicle is used, particularly, the table plate 6 is taken down from the unfolding state to the folding state, the hinge point in the middle of the two connecting rod assemblies 1 on the bottom frame is lifted, the hinge point in the middle of the two connecting rod assemblies 1 is lifted upwards, the two third connecting rods 101 on the two connecting rod assemblies 1 are close to each other, a lifting belt can be installed on the hinge point in the middle of the two connecting rod assemblies 1 when the folding vehicle is used, the lifting belt is convenient to lift, meanwhile, the hinge point at the top of the middle four connecting rod assemblies 2 is lifted, at the moment, the four connecting rod assemblies 3 at the end parts of the two sides are close to each other inwards, and the front wheels and the rear wheels 5 are overlapped when seen from the side.
The folding vehicle provided by the invention is operated from a folding state to an unfolding state: press the pin joint at middle part four link assembly 2 top, press the middle part pin joint of two link assembly 1 simultaneously, during this, the tip four link assembly 3 at both ends expand, take off the table 6 put on the folding frame 4 after expanding can.
The two connecting rod assemblies 1 are folded upwards, the whole bottom frame is folded upwards, the whole folding frame 4 is linked to be folded at the moment, when the two connecting rod assemblies 1 are unfolded and two third connecting rods 101 in the two connecting rod assemblies 1 are kept in a horizontal state, all rod positions are fixed, and the rods are made into stable truss structures, so that the whole folding frame 4 is extremely high in rigidity and strength, can be made of light, thin and small-section materials, the weight of the whole folding frame 4 is reduced, the economic cost is saved, and meanwhile, the folding frame is suitable for women, old people and other people groups, and is high in practicability.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (10)
1. A four-connecting-rod locking mechanism is characterized by comprising two connecting rod assemblies (1), at least one middle four-connecting-rod assembly (2) and end four-connecting-rod assemblies (3) symmetrically arranged at two sides of the middle four-connecting-rod assembly (2); wherein,
the end part four-connecting-rod assembly (3) is formed by hinging 4 first connecting rods (301); the middle four-connecting-rod assembly (2) is of a diamond structure formed by hinging 4 second connecting rods (201) end to end; the two-connecting-rod assembly (1) is formed by hinging 2 third connecting rods (101) with equal length;
one hinged point of the end four-connecting-rod assembly (3) is connected with one hinged point of the middle four-connecting-rod assembly (2); the hinge point on the two-link assembly (1) is positioned on the central line of the middle four-link assembly (2); one hinge point of the end four-connecting-rod assembly (3) is hinged with the end of the two-connecting-rod assembly (1).
2. A four-bar locking mechanism according to claim 1, characterized in that the position of the hinge point in the middle of the two-bar linkage assembly (1) is lower than the position of the hinge point with the end four-bar linkage assembly (3).
3. The four-bar linkage locking mechanism according to claim 1 or 2, characterized in that a cross bar (202) is connected to the bottom of the middle four-bar linkage assembly (2), and the hinge point of the middle of the two-bar linkage assembly (1) abuts against the cross bar (202).
4. The four-bar linkage locking mechanism according to claim 1, characterized in that the two first links (301) and the two second links (201) at the junction of the end four-bar linkage assembly (3) and the middle four-bar linkage assembly (2) are crossed and the first links (301) and the second links (201) arranged in the same direction are connected as a single bar.
5. Use of a four-bar linkage locking mechanism according to any of claims 1-4 in a folding cart, chair, table.
6. A folding cart applying the four-bar linkage locking mechanism according to any one of claims 1 to 4, characterized by comprising a folding frame (4), wheels (5) arranged at the bottom of the folding frame (4), and a table board (6) arranged at the top of the folding frame (4); the folding frame (4) comprises at least two four-connecting-rod locking mechanisms, and two ends and the bottoms of the adjacent four-connecting-rod locking mechanisms are connected through a plurality of connecting rods (7);
the table plate (6) comprises at least two jointed plates, and the two jointed plates are hinged or not connected with each other.
7. The folding cart according to claim 6, characterized in that said two-bar linkage assembly (1) is connected by said connecting rod (7) to form a bottom frame, said first connecting rod (301) longitudinally disposed on said end four-bar linkage assembly (3) is connected by said connecting rod (7) to form an end frame, and said wheel (5) is disposed at the bottom of said end frame.
8. The folding cart according to claim 7, further comprising a supporting four-bar linkage assembly, wherein the supporting four-bar linkage assembly is formed by a first bar (8), a second bar (9), a third bar (10) and a fourth bar (11) which are hinged together, one end of the first bar (8) is hinged to the hinged joint of the end frame and the bottom frame, the other end of the first bar (8) is connected to one end of the second bar (9), the fourth bar (11) is vertically fixed at the bottom of the end frame and the end of the fourth bar extends out of the bottom frame, the other end of the second bar (9) is hinged to one end of the fourth bar (11), one end of the third bar (10) is hinged to the fourth bar (11), and the other end of the third bar (10) is a free end.
9. The folding cart of claim 7, characterized in that a U-shaped rail (12) is provided on said end frame, and the two side wall ends of said U-shaped rail (12) are respectively connected to said first link (301) transversely disposed on top of said end four-bar linkage assembly (3) of the adjacent four-bar linkage locking mechanism as a single bar.
10. The foldable vehicle as claimed in claim 6, further comprising an umbrella (13), wherein the table (6) is provided with a hole (601), the bottom end of the umbrella rod (131) of the umbrella (13) passes through the hole (601) and is connected with a support member (132) for stable fixing to the ground, the top of the umbrella rod (131) is provided with a sunshade (133), one side of the bottom edge of the sunshade (133) is provided with a sunshade cloth (134) for shielding the inclined sunlight, and the other side of the bottom edge of the sunshade (133) is provided with a flap band (135) for providing additional shading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510828951.2A CN106476866A (en) | 2015-11-24 | 2015-11-24 | A kind of double leval jib retaining mechanism and its application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510828951.2A CN106476866A (en) | 2015-11-24 | 2015-11-24 | A kind of double leval jib retaining mechanism and its application |
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| CN106476866A true CN106476866A (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510828951.2A Pending CN106476866A (en) | 2015-11-24 | 2015-11-24 | A kind of double leval jib retaining mechanism and its application |
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| CN (1) | CN106476866A (en) |
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| CN110001722A (en) * | 2019-03-08 | 2019-07-12 | 宁波漫道休闲用品有限公司 | A kind of folding pushchair |
| CN110962904A (en) * | 2019-12-23 | 2020-04-07 | 宣城久悠谷电子科技有限公司 | PVC pipeline conveying clamp for sewage discharge |
| CN111689119A (en) * | 2020-06-30 | 2020-09-22 | 中国建筑第四工程局有限公司 | Tool for carrying building blocks in constructional engineering and using method |
| CN111776255A (en) * | 2020-06-24 | 2020-10-16 | 南京理工大学 | A mechanical rope net pressing and releasing mechanism |
| CN114906194A (en) * | 2022-07-06 | 2022-08-16 | 麦粒创造科技(深圳)有限公司 | Folding bicycle |
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Application publication date: 20170308 |
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