CN201771409U - Central frame structure for electric retractable door - Google Patents

Abstract

The utility model relates to a central frame structure for an electric retractable door. The central frame structure comprises a plurality of door frames (10), and a lower cross rod (11) and a bottom beam (12) which are arranged on the lower part of each door frame (10). The central frame structure is characterized in that: the upper parts and lower parts of the plurality of door frames (10) are respectively connected by longitudinal cross connecting rods (20) and horizontal cross connecting rods (30); a central frame (40) is arranged between every two adjacent door frames (10); the upper part of each central frame (40) is connected with the longitudinal cross connecting rods (20) through a swinging piston assembly (50) and a built-in tightening assembly (60); and the lower part of each central frame (40) is connected with the horizontal cross connecting rods (30) through a built-in tightening rotary assembly (70). In the central frame structure, a tightening structure, a rotary structure and a swinging structure are arranged at the connecting positions of the longitudinal cross connecting rods and the horizontal cross connecting rods of the retractable door and are in linkage fit with the horizontal cross connecting rods and the longitudinal cross connecting rods with the stretching and retracting of the horizontal cross connecting rods and the longitudinal cross connecting rods, so pressure on a connecting pipe can be reduced effectively, and the central frame is difficult to bend and deform and has attractive appearance.

Description

The central frame structure of electric extendable door

[technical field]

The utility model relates to electric extendable door, particularly relates to a kind of assembling that is easy to, and is stressed even, the central frame structure of the electric extendable door of good looking appearance.

[background technology]

In people's life, can see various doors, as gate of door, gate and the work unit of dwelling house etc., the structure of conventional door is known by people, no matter the form of door how, traditional door all is the switching that realizes door by rotation or push-and-pull dual mode, in recent years, along with development of science and technology, two traditional fan rotary-open-type gates are substituted by electric extendable door gradually, it is convenient that electric extendable door is opened as a kind of novel Men Yiqi, handsome in appearance, many-sided advantage such as can electronicly control and obtain increasingly extensive application.Existing electric extendable door is by cross link a plurality of doorframes to be formed by connecting mostly, though some retractable door is provided with central frame, but framework is the stationary frame of global formation in the middle of it, there are problems such as connecting portion unbalance stress in it, cause the suffered pressure of tube connector bigger, very easily bend and deform, and lack aesthetic feeling.

[summary of the invention]

The utility model is intended to address the above problem, and a kind of suffered pulling force of cross link that can effectively alleviate is provided, be difficult for bending and deforming, and the central frame structure of electric extendable door handsome in appearance.

For achieving the above object, the utility model provides a kind of central frame structure of electric extendable door, comprise a plurality of doorframes, be located at the sheer pole and the bottom girder of doorframe bottom, it is characterized in that, the upper and lower of a plurality of doorframes is connected with horizontal cross link by vertical cross link respectively, between every two adjacent doorframes, be provided with a central frame, the top of this central frame is connected with described vertical cross link with built-in tightening component by swing piston component, and the bottom of central frame is connected with described horizontal cross link by the built-in rotary components that tightens up.

Described central frame comprises straight-bar and bow, the upper end of described straight-bar is connected with swing piston component, the lower end of straight-bar is connected with the built-in rotary components that tightens up, and the upper end of described bow is connected with built-in tightening component, and the lower end of bow is connected with the built-in rotary components that tightens up.

Described built-in tightening component comprises trim, gadget tube connector, decoration, reaches first locking member, a part of activity of described gadget tube connector is placed through the upper end of the vertical cross link that intersects, its another part and trim and decoration are affixed, and decoration is affixed by the bow upper end of first locking member and central frame, and trim is contained between decoration and the vertical cross link.

Described trim is a discoid body, trim central authorities are provided with connecting through hole, be provided with to right-angled intersection first stopper slot, second stopper slot, the 3rd stopper slot and the 4th stopper slot on the inwall of this through hole, the width of described first stopper slot is greater than the width of second stopper slot; Described gadget tube connector comprise integrated tubulose first connecting portion, be located at second connecting portion and the tube connector in first connecting portion outside, described first connecting portion is located at the end of tube connector, second connecting portion is the stretch out ring bodies of the evagination that forms of the surface by tube connector, it is located at the side near first connecting portion, is respectively equipped with first locating piece, second locating piece, the 3rd locating piece and the 4th locating piece that match with first stopper slot, second stopper slot, the 3rd stopper slot and the 4th stopper slot on the described trim on the outer ring surface of described second connecting portion; Described decoration comprises the part spherical shell, the link of this part spherical shell and trim is the plane, be provided with two connecting holes that are connected usefulness with described first connecting portion on the part spherical shell symmetrically, the link compartment of terrain of described part spherical shell and bow is provided with the tensioner sheet that a plurality of outward extending tensioners are used; Described first locking member is the tapered annular body, its top is provided with arc-shaped recess, the top cross of described first locking member is provided with two screws and two breach symmetrically, relatively is provided with the projection of two usefulness that match with described tensioner sheet on the described first locking member outer wall.

The described built-in rotary components that tightens up comprises Connection Block, ball tube connector, press strip and second locking member, wherein, described second locking member is contained in the inside, lower end of described bow, described Connection Block is contained in the bottom of bow, the orbicule of being located at ball tube connector upper end inserts in the Connection Block rotationally, a plurality of horizontal cross link are passed in the lower end of the tube connector of ball tube connector, and affixed with end cap, between the orbicule of ball tube connector and second locking member, be fixed with press strip by cottor pin.

Described Connection Block is provided with ring bodies, and to be provided with a plurality of upwardly extending cross sections be the leg-of-mutton second tensioner sheet in the compartment of terrain on ring bodies upside circumference, is provided with two screws that are connected usefulness with described second locking member on the bottom surface of ring bodies symmetrically; Described ball tube connector is made of the orbicule of second tube connector and end provided thereon; Described press strip is the arc strip shape body, and its middle part is provided with and the corresponding arc of the orbicule of ball tube connector joint portion, and the both ends of press strip are provided with the screw that is connected with described Connection Block respectively; Described second locking member is the tapered annular body, its top is provided with arc-shaped recess, the top cross of described second locking member is provided with two screws and two breach symmetrically, relatively is provided with the projection of two usefulness that match with described tensioner sheet on the described second locking member outer wall.

Described swing piston component comprises one group of wobble-member, interior pipe, connector, seal closure, interior channel closure lid and screw rod, wherein, interior pipe is movably connected on the straight-bar upper end, stretch out outside the straight-bar on its top, channel closure lid in being equipped with on the circumference of pipe bottom in described, in interior pipe, screw rod is housed, the screw rod lower end is connected with interior channel closure lid, its upper end is threaded with described connector, the center of top of connector is provided with axial junction plate, this axial junction plate pivot bush unit respectively is equipped with a wobble-member on the connecting axle of the both sides of junction plate on the connecting axle between two cross link, in the straight-bar upper end ring-type seal closure is housed.

Described wobble-member is circular plate body, the central authorities of wobble-member are provided with the connecting hole that is connected usefulness with described connecting axle, one side of wobble-member is the plane, opposite side is the conical surface, on its conical surface proximal edge respectively symmetry be provided with reference column and the locating hole that is connected with described vertical cross link, wobble-member flexibly connects with the junction plate of vertical cross link and connector respectively by its reference column and locating hole.

Described seal closure is a ring bodies, it comprises the inner ring body and the outer ring body of one with it, the height of inner ring body is less than the height of outer ring body, be provided with a plurality of L shaped clamping sheets in the lower limb compartment of terrain of inner ring body, be provided with a plurality of grooves on the inwall of the upper end of straight-bar, a plurality of L shaped clamping sheets embed in the described groove seal closure and straight-bar are fixed; The channel closure lid is circular blocks in described, and this seal closure center has screw, the bottom of pipe in seal closure is connected in by the screw rod that passes this screw.

Pipe jointing part and cross link connecting portion in described connector comprises, wherein, interior pipe jointing part reaches the cross symmetry that is extended to form by the connecting ring inboard downwards by connecting ring and four connection straps that interconnect constitute, four connection strap central authorities are provided with the screw that is connected usefulness with described screw flight, are formed with the cannelure that inserts for interior pipe between connecting ring and four connection straps; Described cross link connecting portion is to extend upward the plate body that forms by the connecting ring upper face center, its central authorities are provided with the connecting hole that is connected usefulness with described connecting axle, the bilateral symmetry of this connecting hole be provided with two locating holes that are connected usefulness with the reference column on the wobble-member.

Good effect of the present utility model is, by tighten up in the central frame of retractable door and the vertical connecting portion setting of cross link and horizontal cross link, rotation and swinging structure, make each connecting portion to link mutually with the flexible of lateral cross connecting rod and vertical cross link, form the motion of similar piston on central frame top, therefore novel structure connects reliably, and can effectively alleviate the suffered pulling force of cross link, be difficult for bending and deforming, and handsome in appearance.

[description of drawings]

Figure 1A is the schematic perspective view that the retractable door of this central frame is housed of the present utility model.

Figure 1B is the forward sight floor map that the retractable door of this central frame is housed of the present utility model.

Fig. 1 C is the lateral view of Figure 1B.

Fig. 1 D is a central frame lateral view of the present utility model.

Fig. 2 A is the connection diagram of built-in tightening component of the present utility model and vertical cross link.

Fig. 2 B is to be the schematic perspective view of first locking member of the present utility model.

Fig. 2 C is the upward view of Fig. 2 B.

Fig. 2 D is the vertical view of Fig. 2 B.

Fig. 2 E is the schematic perspective view of decoration of the present utility model.

Fig. 2 F is the sectional view of Fig. 2 E.

Fig. 2 G is the floor map of decoration of the present utility model.

Fig. 2 H is the schematic perspective view of trim of the present utility model.

Fig. 2 I is the side view cutaway drawing of trim of the present utility model.

Fig. 2 J is the floor map of trim of the present utility model.

Fig. 2 K is the schematic perspective view of gadget tube connector of the present utility model.

Fig. 2 L is the floor map of gadget tube connector of the present utility model.

Fig. 3 A is a built-in connection diagram of tightening up rotary components and horizontal cross link of the present utility model.

Fig. 3 B is a parts exploded perspective view of the present utility model.

Fig. 3 C is a Connection Block schematic perspective view of the present utility model.

Fig. 3 D is the vertical view of Connection Block of the present utility model.

Fig. 3 E is the second locking member schematic perspective view of the present utility model.

Fig. 3 F is the upward view of Fig. 3 E.

Fig. 3 G is the vertical view of Fig. 3 E.

Fig. 3 H is a ball tube connector structural representation of the present utility model.

Fig. 3 I is a press strip schematic perspective view of the present utility model.

Fig. 3 J is the sectional view of press strip of the present utility model.

Fig. 4 A is the connection diagram of swing piston component of the present utility model and vertical cross link.

Fig. 4 B is a connector schematic perspective view of the present utility model.

Fig. 4 C is a connector sectional view of the present utility model.

Fig. 4 D is a wobble-member schematic perspective view of the present utility model.

Fig. 4 E is the lateral view of wobble-member of the present utility model.

Fig. 4 F is a seal closure schematic perspective view of the present utility model.

Fig. 4 G is the sectional side view of seal closure of the present utility model.

Fig. 4 H is an interior channel closure lid schematic perspective view of the present utility model.

Fig. 4 I is the sectional view of interior channel closure lid of the present utility model.

[specific embodiment]

The following example is to further explanation of the present invention and explanation, and the present invention is not constituted any limitation.

As Figure 1A, 1C, shown in, the central frame structure of electric extendable door of the present utility model comprises a plurality of doorframes 10, vertical cross link 20, horizontal cross link 30, central frame 40, swing piston component 50, built-in tightening component 60 and the built-in rotary components 70 that tightens up.As Fig. 1 C, described doorframe 10 is the tubular body of inner hollow, and it is the general frame that is made of arc limit 13 and straight flange 14, is provided with sheer pole 11 and bottom girder 12 in doorframe 10 bottoms.The upper and lower of a plurality of doorframes 10 is connected with horizontal cross link 30 by vertical cross link 20 respectively, drives retractable door contraction or expansion by vertical cross link 20 and horizontal cross link 30.

Shown in Fig. 1 C, between every two adjacent doorframes 10, be provided with a central frame 40, the top of this central frame 40 is connected with described vertical cross link 20 with built-in tightening component 60 by swing piston component 50, and the bottom of central frame 40 is connected with described horizontal cross link 30 by the built-in rotary components 70 that tightens up.Described central frame 40 comprises straight-bar 41 and bow 42, and described straight-bar 41 is the vertical tubular body that is provided with, and its upper end is connected with swing piston component 50, and the lower end of straight-bar 41 is connected with the built-in rotary components 60 that tightens up.Described bow 42 is the tubular body of arc, and its upper end is connected with built-in tightening component 60, and the lower end of bow 42 is connected with the built-in rotary components 70 that tightens up.

Shown in Fig. 2 A, described built-in tightening component 60 comprises trim 61, gadget tube connector 62, decoration 63 and first locking member 64, shown in Fig. 2 H～2J, described trim 61 is the circular discoid body, the link of this trim and decoration 63 is the plane, the sphere contact portion of its edge and decoration is a cambered surface, and the central authorities of trim 61 are provided with the through hole 611 that is connected usefulness with described gadget tube connector 62.On the hole wall of this through hole, be provided with to right-angled intersection first stopper slot 6111, second stopper slot 6112, the 3rd stopper slot 6113 and the 4th stopper slot 6114, the width of described first stopper slot 6111 is greater than the width of second stopper slot 6112, and both width also can be identical certainly.Described trim 61 be contained on the gadget tube connector 62 decoration 63 and vertically between the cross link 20.Shown in Fig. 2 K, 2L, described gadget tube connector 62 comprise integrated tubulose first connecting portion 621, be located at second connecting portion 622 and the tube connector 623 in first connecting portion outside, described first connecting portion 621 is round tubular body, it is located at the end of tube connector 623, and the central axis of the central axis of this connecting portion 621 and tube connector 623 is perpendicular.Described second connecting portion 622 is stretch out ring bodies of the evagination that forms of the surface by tube connector 623, it is located at the inboard near first connecting portion, is respectively equipped with first locating piece 6221, second locating piece 6222, the 3rd locating piece 6223 and the 4th locating piece (scheming not shown) that match with first stopper slot 6111, second stopper slot 6112, the 3rd stopper slot 6113 and the 4th stopper slot 6114 on the described trim 61 on the outer ring surface of this second connecting portion 622.Tube connector 623 is used to connect vertical cross link 20.As Fig. 2 A, tube connector 623 activities of described gadget tube connector 62 are placed through in the connecting hole of upper end of the vertical cross link 20 that intersects, first connecting portion 621 of gadget tube connector inserts in the decoration 63 through the link of decoration 63, and affixed through connecting hole 6311, the 6312 usefulness bolts and the decoration 63 of decoration 63.Shown in Fig. 2 E～2G, described decoration 63 comprises part spherical shell 631, this part spherical shell 631 is the planes that cut out on spherical shell with the link of trim 61, be provided with two connecting holes 6311,6312 that are connected usefulness with described first connecting portion 621 on the part spherical shell 631 symmetrically, part spherical shell 631 is provided with a plurality of tensioner sheets 632 that play the tensioner effect with the link compartment of terrain of bow 42, a plurality of tensioner sheets are to be extended downwards and formed by the end of part spherical shell, its cross section is a triangle, is formed with the breach 633 of a plurality of rectangles between a plurality of tensioner sheets 632.Described decoration 63 is affixed with bow 42 upper ends of central frame by first locking member 64.Shown in Fig. 2 B～2D, described first locking member 64 is the tapered annular body, its central authorities are provided with arc-shaped recess 641, the edge cross at the top of first locking member is provided with 642,643 and two breach 644,645 of two screws symmetrically, relatively is provided with two rectangular-shaped protruding 646,647 of usefulness that match with a plurality of breach 633 on the described decoration 63 on described first locking member, 64 outer walls.

Shown in Fig. 2 A, in the present embodiment, built-in tightening component 60 is as follows with the method for attachment of vertical cross link 20 and bow 42: at first first locking member 64 is contained in upper ends in the bow 42, tensioner sheet 632 with decoration 63 is inserted into first locking member, 64 outsides again, and make rectangular-shaped protruding 646 of first locking member, 647 embed in the adjacent breach 633, and with tensioner sheet 632 tensioners between first locking member 64 and bow 42, form built-in tightening structure, use two screws 642 of screw again by the top of first locking member, 643 are connected first locking member 64 with decoration 63.The other end of decoration 63 is connected with first connecting portion 621 of gadget tube connector.First locating piece 6221, second locating piece 6222, three locating piece 6223 and four locating piece of trim 61 by its first stopper slot 6111, second stopper slot 6112, the 3rd stopper slot 6113 and the 4th stopper slot 6114 and second connecting portion mutual chimeric is contained on second connecting portion 622 of gadget tube connector 62, the inboard sphere with decoration in its edge matches, its outside, edge is smooth cambered surface then, forms good decorative effect.Tube connector 623 activities of described gadget tube connector 62 are placed through in the connecting hole of upper end of the vertical cross link 20 that intersects, link through decoration 63 inserts in the decoration 63, and affixed through connecting hole 6311, the 6312 usefulness bolts and the decoration 63 of decoration 63.The other end end of the tube connector 623 of gadget tube connector 62 is equipped with and is decorated with end cap 65.

As shown in Figure 3A, the described built-in rotary components 70 that tightens up comprises Connection Block 71, ball tube connector 72, press strip 73 and second locking member 74, shown in Fig. 3 C, 3D, described Connection Block 71 comprises the ring bodies 711 and the second tensioner sheet 712, the compartment of terrain is provided with a plurality of second tensioner sheets 712 on ring bodies 711 upside circumference, a plurality of second tensioner sheets are extended upward and are formed by the edge of ring bodies 711, its cross section is a triangle, is formed with a plurality of rectangular-shaped breach 713 between a plurality of second tensioner sheets 712.Be provided with two screws 7121,7122 that are connected usefulness with described second locking member 74 on the bottom surface of described ring bodies 711 symmetrically.Described Connection Block 71 is contained in the bottom of bow 42.Shown in Fig. 3 H, described ball tube connector 72 is made of the orbicule 721 of second tube connector 722 and end provided thereon, and as Fig. 3 A, the orbicule 721 of ball tube connector 72 upper ends inserts in the Connection Block 71 rotationally, and formation is rotatably connected.A plurality of horizontal cross link 30 are passed in the lower end of the tube connector 722 of ball tube connector 72, and affixed with end cap 75.Between the orbicule 721 of ball tube connector 72 and second locking member 74, be fixed with press strip 73 by cottor pin 76.Shown in Fig. 3 I, 3J, described press strip 73 is the arc strip shape body, its middle part is provided with the orbicule 721 corresponding arc joint portions 731 with the ball tube connector, and the both ends of press strip are provided with the screw 732,733 that is connected with described second locking member 74 and Connection Block 71 respectively.Shown in Fig. 3 E～3G, described second locking member 74 is the tapered ring bodies of external surface, it is contained in the inside, lower end of described bow 42, its center of top is provided with arc-shaped recess 741, the edge cross at the top of described first locking member is provided with 742,743 and two of two screws symmetrically and places the breach 744,745 that described press strips are used, and relatively is provided with the projection 746,747 of two usefulness that match with breach 713 on the described Connection Block 71 on described second locking member, 74 outer walls.

As Fig. 3 A, shown in the 3B, in the present embodiment, built-in to tighten up rotary components 70 as follows with the method for attachment of horizontal cross link 30: second locking member 74 is packed in bow 42 bottoms, again press strip 73 is placed the set breach 744 on described second locking member 74,745 and arc-shaped recess 741 in, then the orbicule 721 with ball tube connector 72 inserts in the arc-shaped recess 741 of second locking member 74, and contact with the arc joint portion 731 of press strip, packed in the lower end of the tube connector 722 of the ball tube connector 72 of Connection Block 71 then, and with screw through its screw 7121, the screw 742 of 7122 and second locking member, 743 and second locking member fixes, by second tensioner sheet 712 tensioners of second locking member 74 with Connection Block 71.A plurality of horizontal cross link 30 are passed in the lower end of the tube connector 722 of ball tube connector, and affixed with end cap 75, when retractable door when flexible, bow 42 lower ends can be rotated around the orbicule 721 of ball tube connector 72.

Shown in Fig. 4 A, described swing piston component 50 comprises two wobble-members 51, interior pipe 52, connector 53, seal closure 54, interior channel closure lid 55 and screw rod 56, the diameter of pipe 52 is less than the diameter of straight-bar 41 in described, it is movably connected on straight-bar 41 upper ends, stretch out outside the straight-bar 41 on its top, channel closure lid 55 in being equipped with on the circumference of interior pipe 52 bottoms.In interior pipe 52 screw rod 56 is housed, the screw rod lower end is connected with interior channel closure lid 55, and its upper end is threaded with described connector 53.Shown in Fig. 4 B, 4C, pipe jointing part 531 and cross link connecting portion 532 in described connector 53 comprises, wherein, interior pipe jointing part 531 reaches the cross symmetry that is extended to form by the connecting ring inboard downwards by connecting ring 5311 and four connection straps 5312 that interconnect is integrally formed, the cross section of connection strap 5312 is T-shaped, be provided with the screw 53111 of the usefulness that is threaded with described screw rod 56 in four connection strap 5312 central authorities, between connecting ring 5311 and four connection straps 5312, be formed with the cannelure 5313 that inserts for interior pipe 52.Described cross link connecting portion 532 is to extend upward the plate body that forms by connecting ring 5311 upper face center, its central authorities are provided with the connecting hole 53112 that is connected usefulness with described connecting axle 57, the bilateral symmetry of this connecting hole be provided with two locating holes 53113,53114 that are connected usefulness with the reference column 513 on the wobble-member 51, described cross link connecting portion pivot bush unit respectively is equipped with a wobble-member 51 on the connecting axle of the both sides of cross link connecting portion 532 on the connecting axle between two cross link 20.Shown in Fig. 4 D, 4E, described wobble-member 51 is circular plate body, the central authorities of wobble-member 51 are provided with the connecting hole 511 that is connected usefulness with described connecting axle 57, wobble-member 51 is the plane with the side that vertical cross link 20 is connected, a side that is connected with connector 53 is the conical surface, the proximal edge reference column 513 and the locating hole 512 that are provided with the evagination that is connected with described vertical cross link 20 of symmetry respectively on its conical surface, wobble-member 51 flexibly connects with vertical cross link 20 and the cross link connecting portion 532 be located on the connector 53 respectively by its reference column 513 and locating hole 512.Shown in Fig. 4 F, 4G, described seal closure 54 is a ring bodies, and it is loaded on the upper end of described straight-bar 41, and it comprises the inner ring body 541 and the outer ring body 542 of one with it, and the height of inner ring body 541 is less than the height of outer ring body 542.Between inner ring body 541 and outer ring body 542, be formed with the cannelure 543 that inserts for straight-bar 41, be provided with a plurality of L shaped clamping sheets 5411 in the lower limb compartment of terrain of inner ring body 541, be provided with a plurality of grooves 211 on the inwall of the upper end of straight-bar 41, a plurality of L shaped clamping sheets embed in the described groove 211 seal closure 54 and straight-bar 41 are fixed.Shown in Fig. 4 H～4I, described interior channel closure lid 55 is that the cross section is the circular blocks of convex, and its central authorities have screw 554, the bottom of pipe 52 in seal closure is connected in by the screw rod 56 that passes this screw.

Shown in Fig. 4 A, in the present embodiment, swing piston component 50 is as follows with the method for attachment of straight-bar 41 and horizontal cross link 30: the upper end of at first seal closure 54 being fixed in straight-bar 41, and the both ends of pipe 52 in connector 53 and interior channel closure lid 55 be connected in by screw rod 56, insert in the straight-bar 41 bottom of interior pipe 52.The interior pipe jointing part 531 of connector is connected on the connecting axle 57 by its connecting ring 5311, pipe jointing part 531 both sides in two wobble-members 51 are contained in respectively.

Although the utility model is disclosed by above embodiment, but scope of the present utility model is not limited thereto, do not departing under the condition of the utility model design, more than each member can replace with the similar or equivalent element that affiliated technical field personnel understand.

Claims (10)

1. the central frame structure of an electric extendable door, comprise a plurality of doorframes (10), be located at the sheer pole (11) and the bottom girder (12) of doorframe (10) bottom, it is characterized in that, the upper and lower of a plurality of doorframes (10) is connected with horizontal cross link (30) by vertical cross link (20) respectively, between every adjacent two doorframes (10), be provided with a central frame (40), the top of this central frame (40) is connected with described vertical cross link (20) with built-in tightening component (60) by swing piston component (50), and the bottom of central frame (40) is connected with described horizontal cross link (30) by the built-in rotary components (70) that tightens up.

2. the central frame structure of electric extendable door as claimed in claim 1, it is characterized in that, described central frame (40) comprises straight-bar (41) and bow (42), the upper end of described straight-bar (41) is connected with swing piston component (50), the lower end of straight-bar is connected with horizontal cross link (30), the upper end of described bow (42) is connected with built-in tightening component (60), and the lower end of bow is connected with the built-in rotary components (70) that tightens up.

3. the central frame structure of electric extendable door as claimed in claim 2, it is characterized in that, described built-in tightening component (60) comprises trim (61), gadget tube connector (62), decoration (63), and first locking member (64), a part of activity of described gadget tube connector (62) is placed through the upper end of the vertical cross link (20) that intersects, its another part and trim (61) and decoration (63) are affixed, and decoration (63) is affixed with bow (42) upper end of central frame by first locking member (64), and trim (61) is contained between decoration (63) and the vertical cross link (20).

4. the central frame structure of electric extendable door as claimed in claim 3, it is characterized in that, described trim (61) is a discoid body, trim central authorities are provided with connecting through hole (611), be provided with to right-angled intersection first stopper slot (6111), second stopper slot (6112), the 3rd stopper slot (6113) and the 4th stopper slot (6114) on the inwall of this through hole, the width of described first stopper slot (6111) is greater than the width of second stopper slot (6112); Described gadget tube connector (62) comprises first connecting portion (621) of integrated tubulose, be located at second connecting portion (622) and the tube connector (623) in first connecting portion outside, described first connecting portion (621) is located at the end of tube connector (623), second connecting portion (622) is the stretch out ring bodies of the evagination that forms of the surface by tube connector (623), it is located at the side near first connecting portion, be respectively equipped with on the outer ring surface of described second connecting portion (622) with described trim (61) on first stopper slot (6111), second stopper slot (6112), first locating piece (6221) that the 3rd stopper slot (6113) and the 4th stopper slot (6114) match, second locating piece (6222), the 3rd locating piece (6223) and the 4th locating piece; Described decoration (63) comprises part spherical shell (631), this part spherical shell (631) is the plane with the link of trim (61), be provided with two connecting holes (6211,6212) that are connected usefulness with described first connecting portion (621) on the part spherical shell (631) symmetrically, described part spherical shell (631) is provided with the tensioner sheet (632) that a plurality of outward extending tensioners are used with the link compartment of terrain of bow (42); Described first locking member (64) is the tapered annular body, its top is provided with arc-shaped recess (641), the top cross of described first locking member is provided with two screws (642,643) and two breach (644,645) symmetrically, relatively is provided with the projection (646,647) of two usefulness that match with described tensioner sheet (632) on described first locking member (64) outer wall.

5. the central frame structure of electric extendable door as claimed in claim 3, it is characterized in that, the described built-in rotary components (70) that tightens up comprises Connection Block (71), ball tube connector (72), press strip (73) and second locking member (74), wherein, described second locking member (74) is contained in the inside, lower end of described bow (42), described Connection Block (71) is contained in the bottom of bow (42), the orbicule (721) of being located at ball tube connector (72) upper end inserts in the Connection Block (71) rotationally, a plurality of horizontal cross link (30) are passed in the lower end of the tube connector (722) of ball tube connector (72), and affixed with end cap (75), between the orbicule (721) of ball tube connector (72) and second locking member (74), be fixed with press strip (73) by cottor pin.

6. the central frame structure of electric extendable door as claimed in claim 3, it is characterized in that, described Connection Block (71) is provided with ring bodies (711), to be provided with a plurality of upwardly extending cross sections be the leg-of-mutton second tensioner sheet (712) in the compartment of terrain on ring bodies (711) upside circumference, is provided with two screws (7121,7122) that are connected usefulness with described second locking member (74) on the bottom surface of ring bodies (711) symmetrically; Described ball tube connector (72) is made of the orbicule (721) of second tube connector (722) and end provided thereon; Described press strip (73) is the arc strip shape body, and its middle part is provided with orbicule (721) the corresponding arc joint portion (731) with the ball tube connector, and the both ends of press strip are provided with the screw (732,733) that is connected with described Connection Block (71) respectively; Described second locking member (74) is the tapered annular body, its top is provided with arc-shaped recess (741), the top cross of described second locking member is provided with two screws (742,743) and two breach (744,745) symmetrically, relatively is provided with the projection (746,747) of two usefulness that match with described tensioner sheet (712) on described second locking member (74) outer wall.

7. the central frame structure of electric extendable door as claimed in claim 1, it is characterized in that, described swing piston component (50) comprises one group of wobble-member (51), interior pipe (52), connector (53), seal closure (54), interior channel closure lid (55) and screw rod (56), wherein, interior pipe (52) is movably connected on straight-bar (41) upper end, stretch out outside the straight-bar (41) on its top, channel closure lid (55) in being equipped with on the circumference of pipe (52) bottom in described, screw rod (56) is housed in interior pipe (52), the screw rod lower end is covered (55) with interior channel closure and is connected, its upper end is threaded with described connector (53), the top movable of connector (53) is socketed on the connecting axle (57) between two cross link (20), on the connecting axle (57) of the both sides of connector (53), a wobble-member (51) is housed respectively, ring-type seal closure (54) is housed in straight-bar (41) upper end.

8. the central frame structure of electric extendable door as claimed in claim 1, it is characterized in that, described wobble-member (51) is circular plate body, the central authorities of wobble-member (51) are provided with the connecting hole (511) that is connected usefulness with described connecting axle (57), one side of wobble-member (51) is the plane, opposite side is the conical surface, on its conical surface proximal edge respectively symmetry be provided with reference column (513) and the locating hole (512) that is connected with described vertical cross link (20), wobble-member (51) flexibly connects with vertical cross link (20) and connector (53) respectively by its reference column (513) and locating hole (512).

9. the central frame structure of a kind of electric extendable door as claimed in claim 1, it is characterized in that, described seal closure (54) is a ring bodies, it comprises inner ring body (541) and the outer ring body of one (542) with it, the height of inner ring body (541) is less than the height of outer ring body (542), be provided with a plurality of L shaped clamping sheets (5411) in the lower limb compartment of terrain of inner ring body (541), be provided with a plurality of grooves on the upper end inwall of straight-bar (41), a plurality of L shaped clamping sheets embed in the described groove seal closure (54) and straight-bar (41) are fixed; Channel closure lid (55) is circular blocks in described, and this seal closure center has screw (554), and seal closure is connected in the bottom of interior pipe (52) by the screw rod (56) that passes this screw.

10. the central frame structure of electric extendable door as claimed in claim 1, it is characterized in that, described connector (53) comprises interior pipe jointing part (531) and cross link connecting portion (532), wherein, interior pipe jointing part (531) reaches the cross symmetry that is extended to form by the connecting ring inboard downwards by connecting ring (5311) and four connection straps (5312) that interconnect constitute, four connection straps (5312) central authorities are provided with the screw (53111) of the usefulness that is threaded with described screw rod (56), are formed with the cannelure (5313) that inserts for interior pipe (52) between connecting ring (5311) and four connection straps (5312); Described cross link connecting portion (532) is to extend upward the plate body that forms by connecting ring (5311) upper face center, its central authorities are provided with the connecting hole (53112) that is connected usefulness with described connecting axle (57), the bilateral symmetry of this connecting hole be provided with two locating holes (53113,53114) that are connected usefulness with the reference column (513) on the wobble-member (51).

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