CN210174976U - Sojourn in car as a house sub vehicle frame lightweight structure - Google Patents
Sojourn in car as a house sub vehicle frame lightweight structure Download PDFInfo
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- CN210174976U CN210174976U CN201921002368.6U CN201921002368U CN210174976U CN 210174976 U CN210174976 U CN 210174976U CN 201921002368 U CN201921002368 U CN 201921002368U CN 210174976 U CN210174976 U CN 210174976U
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- cross beam
- connecting plate
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- longitudinal
- longeron
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- 229940036051 sojourn Drugs 0.000 title claims abstract description 14
- 230000002146 bilateral effect Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000001815 facial effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a sojourn car as a house sub vehicle frame lightweight structure, including the front beam, the front beam rear side is equipped with the back frame, be equipped with many the same well crossbeams between front beam and the back frame, the front beam, each well crossbeam and back frame are connected fixedly through many longerons each other, each longeron front end all is connected through bolt spare with the front beam rear end, each longeron rear end all is connected through bolt spare with the back beam front end, the well crossbeam is opened downwards from the top surface in the position department of being connected with the longeron and is used for placing the breach of longeron, the well crossbeam left and right crossbeam connecting plate that the vertical and arrange along the front and back that weld respectively at left and right ends in the breach, the longeron is arranged in the breach of well crossbeam and the longeron passes through bolt spare with left and; a plurality of lightening holes are formed in the front cross beam, each middle cross beam and the rear cross beam. The utility model discloses have better holding power to the loading box body, and the weight of this sub vehicle frame is lighter.
Description
Technical Field
The utility model belongs to the technical field of sojourn car as a house, concretely relates to sojourn car as a house sub vehicle frame lightweight structure.
Background
The auxiliary frame of the motor caravan is an important component of the motor caravan and plays a role in connecting the second-class chassis and supporting the upper loading box body. The sub vehicle frame that uses usually is the frame welded structure of rectangular pipe or square pipe, this kind of structure exists welding deformation, it is relatively poor to cause the surface smoothness who is connected with the contact of facial features, flagging phenomenon can appear in the position at sub vehicle frame both ends even, with the installation back of facial features, not only can not play the supporting role, still can give a decurrent pulling force of facial features, after a period of use again, can cause the devastating action to the facial features.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sojourn car as a house sub vehicle frame lightweight structure, this sub vehicle frame have better holding power to the facial make-up car box, and the weight of this sub vehicle frame is lighter.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a light-weight structure of an auxiliary frame of a recreational vehicle comprises a front cross beam which is horizontally arranged, is arranged on the left and right, a rear cross beam which is parallel to the front cross beam and has the top end at the same level with the top end of the front cross beam is arranged on the rear side of the front cross beam, a plurality of middle cross beams which are parallel to each other are arranged between the front cross beam and the rear cross beam, the middle cross beams are parallel to the front cross beam, the top ends of the middle cross beams and the top end of the front cross beam are at the same level with the top end of the front cross beam, the middle cross beams and the rear cross beam are mutually connected and fixed through a plurality of longitudinal beams which are identical in level and are arranged in the front and the rear, the front ends of the longitudinal beams and the rear ends of the front cross beams are all connected through bolt pieces, the shape, the structure and the size of each middle cross beam are identical, the middle cross beam is a thin and straight cuboid, a horizontal left narrow supporting plate extends leftwards integrally at the left upper end of the longitudinal beam, a horizontal right narrow supporting plate extends rightwards integrally at the right upper end of the longitudinal beam, a notch for placing the longitudinal beam is formed in the position, connected with the longitudinal beam, of the middle cross beam from the top surface downwards, a left cross beam connecting plate and a right cross beam connecting plate which are arranged vertically and along the front and the back are welded at the left end and the right end of the middle cross beam respectively, the longitudinal beam is placed in the notch of the middle cross beam and connected with the left cross beam connecting plate and the right cross beam connecting plate through bolt pieces, and the top ends of the left narrow supporting plate and the right narrow supporting plate of each longitudinal beam and the top ends of the; a plurality of lightening holes are formed in the front cross beam, each middle cross beam and the rear cross beam; the right end of the longitudinal beam on the rightmost side is also connected with a step steel ladder through a bolt piece; each cross beam and each longitudinal beam form an auxiliary frame, and a loading box body is arranged on the auxiliary frame.
Furthermore, the left cross beam connecting plate and the right cross beam connecting plate are arranged in a bilateral symmetry mode, the left outer side face of the longitudinal beam in the notch is attached to the right side face of the left cross beam connecting plate, the right outer side face of the longitudinal beam in the notch is attached to the left side face of the right cross beam connecting plate, a first sleeve and a second sleeve which are horizontally arranged and arranged in a left-right mode are symmetrically arranged in the front portion and the rear portion of the upper opening groove of the longitudinal beam in the notch, the horizontal length of the first sleeve in the left-right direction is smaller than the horizontal length of the upper opening groove in the left-right direction, the longitudinal beam is connected with the left cross beam connecting plate and the right cross beam connecting plate through a first bolt piece and a second bolt piece, the first bolt piece comprises a first bolt and a first nut matched with the first bolt, the first bolt is located at the front portion of the lower opening groove of the middle cross beam, and the left side wall, The right side wall of the corresponding position of the longitudinal beam and the right cross beam connecting plate are connected in a screwed mode, the right portion of a first bolt extending out of the right cross beam connecting plate is connected with a first nut in a screwed mode, a second bolt piece comprises a second bolt and a second nut matched with the second bolt, the second bolt is located at the rear portion of the lower opening groove of the middle cross beam, the right portion of the second bolt penetrates through the left cross beam connecting plate, the left side wall of the corresponding position of the longitudinal beam, a central through hole of a second sleeve, the right side wall of the corresponding position of the longitudinal beam and the right cross beam connecting plate in sequence, and the right portion of the second bolt extending out of the right cross beam.
Further, the longeron is preceding, the front-back longitudinal beam connecting plate that the symmetrical welding of rear end middle part department has vertical and follow the front that left right direction was arranged, the back longeron connecting plate top is in same level with the narrow backup pad top in a left side, back longeron connecting plate bottom is in same level with the longeron bottom, back longeron connecting plate left end and the narrow backup pad left end parallel and level in a left side, back longeron connecting plate right-hand member and the narrow backup pad right-hand member parallel and level in a right side, back longeron connecting plate trailing flank is laminated with the preceding lateral surface of rear beam mutually, and the back longeron connecting plate passes through the bolt spare with the preceding lateral wall of rear beam and is connected, the back lateral surface of front longeron connecting.
Furthermore, the left and right lengths of the front cross beam, each middle cross beam and the rear cross beam are equal, a straight line formed by connecting lines of the left ends of the front cross beam, each middle cross beam and the rear cross beam is arranged along the front and rear direction, a straight line formed by connecting lines of the right ends of the front cross beam, each middle cross beam and the rear cross beam is arranged along the front and rear direction, and the distance between the right end of the longitudinal beam at the rightmost end and the right end of the middle cross beam in the horizontal and left and right directions is equal to the distance between the left end of the longitudinal beam at the leftmost end and the left.
Furthermore, the bottom ends of the front cross beam, the middle cross beams and the rear cross beam are at the same horizontal height, the shapes, the structures and the sizes of the front cross beam and the rear cross beam are the same, and the shapes, the structures and the sizes of the front cross beam and the middle cross beams are the same.
Furthermore, the number of the middle cross beams is two, and the number of the longitudinal beams is two.
Further, the left narrow support plate and the right narrow support plate are arranged in bilateral symmetry.
Compared with the prior art, the beneficial effects of the utility model are that:
in the utility model, the middle cross beam is hollow and has a slender and straight cuboid shape with an open lower end, a left end and a right end, the longitudinal beam is hollow and has a slender and straight cuboid shape with an open upper end, a front end and a rear end, a horizontal left narrow supporting plate extends leftwards integrally at the left upper end of the longitudinal beam, a horizontal right narrow supporting plate extends rightwards integrally at the right upper end of the longitudinal beam, a notch for placing the longitudinal beam is formed downwards at the position connected with the longitudinal beam from the top surface of the middle cross beam, a left cross beam connecting plate and a right cross beam connecting plate which are vertically arranged along the front and the rear are respectively welded at the left end and the right end of the middle cross beam in the notch, the longitudinal beam is arranged in the notch of the middle cross beam, the longitudinal beam is connected with the left cross beam connecting plate and the right cross beam connecting plate through a bolt, because the longitudinal beam is arranged in the notch of the middle cross beam, the top end of the left narrow supporting plate and the front cross, after the longitudinal beam is fastened with the connecting plates of the left and right cross beams through the bolts, the upper end of the left side wall of the longitudinal beam is close to the upper end of the right side wall of the longitudinal beam, so that the left and right ends of the middle cross beam cannot sag, and the left and right ends of the middle cross beam can slightly tilt up, so that a better stress effect is achieved between the auxiliary frame and the upper truck loading box body, and the auxiliary frame can have better supporting force on the upper truck loading box body after being used in a recreational vehicle;
the utility model discloses in, left side crossbeam connecting plate and right side crossbeam connecting plate bilateral symmetry arrange, the left side lateral surface and the left side crossbeam connecting plate right flank that are in breach intraoral longeron laminate mutually, the right side lateral surface and the right side crossbeam connecting plate left flank that are in breach intraoral longeron laminate mutually, in the last open slot of the longeron that is in breach department preceding, the rear portion symmetry is equipped with the level and controls the first of arranging, the second sleeve pipe, the length of first sheathed tube level and left right direction is less than the level of last open slot and the width of left right direction, the longeron passes through first, second bolt spare is connected with left and right crossbeam connecting plate, first bolt spare includes first bolt and the first nut with first bolt looks adaptation, first bolt is in the anterior department of lower open slot of entablature, and the first bolt right part runs through left crossbeam connecting plate in proper order, longeron relevant position department left side wall, first sleeve pipe center through-hole, The left side wall of the corresponding position of the longitudinal beam and the right cross beam connecting plate are connected with a first nut in a screwing mode, the second bolt comprises a second bolt and a second nut matched with the second bolt, the second bolt is arranged at the rear portion of the inner portion of the lower opening groove of the middle cross beam, the right portion of the second bolt penetrates through the left cross beam connecting plate, the left side wall of the corresponding position of the longitudinal beam, the central through hole of the second sleeve, the right side wall of the corresponding position of the longitudinal beam and the right cross beam connecting plate in sequence, the second nut is connected in a screwing mode at the right portion of the second bolt extending out of the right cross beam connecting plate, the first sleeve and the second sleeve are symmetrically arranged in a front-back mode, the length of the first sleeve in the horizontal and left-right directions is smaller than the width of the upper opening groove in the horizontal and left-right directions, and therefore after the longitudinal beam is fastened with the left cross beam connecting plate and the right cross beam connecting plate through the first bolt and the, The second bolt part is deformed greatly under the action of fastening force;
the utility model discloses in, all open a plurality of lightening holes on front beam, each entablature and the rear frame member, alleviateed weight under the condition of not reducing intensity at the auxiliary frame like this.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;
FIG. 3 is a front view of the cross member of FIG. 2 in connection with a side member;
FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;
fig. 5 is an enlarged structural schematic view of the rear side member connecting plate in fig. 2.
Description of the drawings: 1. the structure comprises a front cross beam, a rear cross beam, a middle cross beam, a longitudinal beam, a left narrow supporting plate, a right narrow supporting plate, a left cross beam connecting plate, a right cross beam connecting plate, a weight reducing hole, a step steel ladder 10, a step steel ladder 11, a first sleeve, a second sleeve, a third sleeve, an upper opening groove 13, a lower opening groove 14, a lower opening groove 15, a first bolt 16, a first nut 17 and a rear longitudinal beam connecting plate.
Detailed Description
As shown in figures 1, 2, 3, 4 and 5, the auxiliary frame lightweight structure of the motor home for sojourn comprises a front cross beam 1 which is horizontally arranged at the left and right sides, a rear cross beam 2 which is parallel to the front cross beam 1 and the top end of which is at the same horizontal height as the top end of the front cross beam 1 is arranged at the rear side of the front cross beam 1, two middle cross beams 3 which are parallel to each other are arranged between the front cross beam 1 and the rear cross beam 2, the middle cross beams 3 are parallel to the front cross beam 1, the top ends of the middle cross beams 3 are at the same horizontal height as the top end of the front cross beam 1, the middle cross beams 3 and the rear cross beam 2 are connected and fixed with each other through two longitudinal beams 4 which are the same, the front ends of the longitudinal beams 4 are connected with the rear end of the front cross beam 1 through bolts, the rear ends of the longitudinal beams 4 are connected with the front end of the rear cross beam, The left end and the right end of the longitudinal beam 4 are both open and thin and straight cuboid, the longitudinal beam 4 is hollow and has open upper end, front end and rear end, a horizontal left narrow supporting plate 5 extends leftwards integrally at the left upper end of the longitudinal beam 4, a horizontal right narrow supporting plate 6 extends rightwards integrally at the right upper end of the longitudinal beam 4, the left narrow supporting plate 5 and the right narrow supporting plate 6 are arranged in bilateral symmetry, a notch for placing the longitudinal beam 4 is formed downwards from the top surface at the position connected with the longitudinal beam 4 by the middle cross beam 3, a left cross beam connecting plate 7 and a right cross beam connecting plate 8 which are vertically arranged along the front and the back are respectively welded at the left end and the right end in the notch by the middle cross beam 3, the longitudinal beam 4 is placed in the notch of the middle cross beam 3, and the longitudinal beam 4 is connected with the left cross beam, the top ends of the left and right narrow supporting plates 6 of each longitudinal beam 4 and the top ends of the front cross beam 1, each middle cross beam 3 and the rear cross beam 2 are all at the same horizontal height; a plurality of lightening holes 9 are formed in the front cross beam 1, each middle cross beam 3 and the rear cross beam 2; the right end of the longitudinal beam 4 at the rightmost side is also connected with a step steel ladder 10 through a bolt piece; each cross beam and each longitudinal beam 4 form an auxiliary frame, and a loading box body is arranged on the auxiliary frame.
The left cross beam connecting plate 7 and the right cross beam connecting plate 8 are arranged in a bilateral symmetry mode, the left outer side face of the longitudinal beam 4 in the notch is attached to the right side face of the left cross beam connecting plate 7, the right outer side face of the longitudinal beam 4 in the notch is attached to the left side face of the right cross beam connecting plate 8, a first sleeve 11 and a second sleeve 12 which are horizontally and leftwards and rightwards arranged are symmetrically arranged in an upper opening groove 13 of the longitudinal beam 4 in the notch, the horizontal length of the first sleeve 11 in the left and right directions is smaller than the horizontal width of the upper opening groove 13 in the left and right directions, the longitudinal beam 4 is connected with the left cross beam connecting plate 7 and the right cross beam connecting plate 8 through first and second bolt pieces, each first bolt piece comprises a first bolt 15 and a first nut 16 matched with the first bolt 15, the first bolt 15 is located in the front portion of a lower opening groove 14 of the middle cross beam 3, and the right portion of the first bolt 15 sequentially, The left side wall of the corresponding position of the longitudinal beam 4, the central through hole of the first sleeve 11, the right side wall of the corresponding position of the longitudinal beam 4, the right beam connecting plate 8, the first nut 16 is screwed at the right part of the first bolt 15 extending out of the right beam connecting plate 8, the second bolt comprises a second bolt and a second nut matched with the second bolt, the second bolt is positioned at the rear part in the lower opening groove 14 of the middle beam 3, the right part of the second bolt sequentially penetrates through the left beam connecting plate 7, the left side wall of the corresponding position of the longitudinal beam 4, the central through hole of the second sleeve 12, the right side wall of the corresponding position of the longitudinal beam 4, the right beam connecting plate 8, and the second nut is screwed at the right part of the second bolt extending out of the right beam connecting plate 8.
Wherein, longeron 4 is preceding, the symmetrical welding of rear end middle part department has vertical and along the front longitudinal beam connecting plate of arranging of left right direction, rear longitudinal beam connecting plate 17, rear longitudinal beam 4 connecting plate top and 5 tops of the narrow backup pad in a left side are in same level, rear longitudinal beam 4 connecting plate bottom and 4 bottoms of longeron are in same level, rear longitudinal beam 4 connecting plate left end and 5 left end parallel and level of the narrow backup pad in a left side, rear longitudinal beam 4 connecting plate right-hand member and 6 right-hand member parallel and level of the narrow backup pad in a right side, rear longitudinal beam 4 connecting plate trailing flank is laminated with the preceding lateral surface of rear beam 2 mutually, and rear longitudinal beam 4 connecting plate passes through bolt spare with the preceding lateral wall of rear beam 2 to be connected, front longitudinal beam 4 connecting plate leading flank is laminated with the back lateral surface of front beam 1 mutually.
The left and right lengths of the front cross beam 1, each middle cross beam 3 and the rear cross beam 2 are equal, a straight line formed by connecting lines of the left ends of the front cross beam 1, each middle cross beam 3 and the rear cross beam 2 is arranged along the front and rear direction, a straight line formed by connecting lines of the right ends of the front cross beam 1, each middle cross beam 3 and the rear cross beam 2 is arranged along the front and rear direction, and the distance between the right end of the longitudinal beam 4 at the rightmost end and the right end of the middle cross beam 3 in the horizontal direction and the distance between the left end and the right end of the longitudinal beam 4 at the leftmost end and the left end of the; the bottom ends of the front cross beam 1, the middle cross beams 3 and the rear cross beam 2 are at the same horizontal height, the shape, the structure and the size of the front cross beam 1 and the rear cross beam 2 are the same, and the shape, the structure and the size of the front cross beam 1 and the middle cross beam 3 are the same.
Claims (7)
1. The utility model provides a sojourn car sub vehicle frame lightweight structure which characterized in that: the left and right narrow support plate comprises a front cross beam which is horizontally arranged, the rear side of the front cross beam is provided with a rear cross beam which is parallel to the front cross beam, the top end of the rear cross beam is at the same level with the top end of the front cross beam, a plurality of middle cross beams which are parallel to each other are arranged between the front cross beam and the rear cross beam, the top ends of the middle cross beams and the top end of the front cross beam are at the same level, the front cross beam, the middle cross beams and the rear cross beam are mutually connected and fixed through a plurality of longitudinal beams which are identical in level and are arranged in the front and at the back, the front end of each longitudinal beam and the rear end of the front cross beam are connected through bolt pieces, the rear end of each longitudinal beam and the front end of the rear cross beam are connected through bolt pieces, the shape, the structure and the size of each middle cross beam are identical, the middle cross beams are hollow, the lower end, the left end and the right end of each longitudinal, a horizontal right narrow supporting plate extends rightwards integrally at the right upper end of the longitudinal beam, a notch for placing the longitudinal beam is formed in the position, connected with the longitudinal beam, of the middle cross beam from the top surface to the bottom, of the middle cross beam, a left cross beam connecting plate and a right cross beam connecting plate which are vertical and arranged along the front and the back are welded at the left end and the right end of the notch respectively, the longitudinal beam is placed in the notch of the middle cross beam and connected with the left cross beam connecting plate and the right cross beam connecting plate through bolt pieces, and the top ends of the left narrow supporting plate and the right narrow supporting plate of each longitudinal beam and the top ends of the; a plurality of lightening holes are formed in the front cross beam, each middle cross beam and the rear cross beam; the right end of the longitudinal beam on the rightmost side is also connected with a step steel ladder through a bolt piece; each cross beam and each longitudinal beam form an auxiliary frame, and a loading box body is arranged on the auxiliary frame.
2. The sojourn car sub-frame lightweight structure of claim 1, wherein: the left cross beam connecting plate and the right cross beam connecting plate are arranged in a bilateral symmetry mode, the left outer side face of a longitudinal beam in the notch is attached to the right side face of the left cross beam connecting plate, the right outer side face of the longitudinal beam in the notch is attached to the left side face of the right cross beam connecting plate, a first sleeve and a second sleeve which are horizontally arranged and arranged in a left-right mode are symmetrically arranged in the front portion and the rear portion of an upper opening groove of the longitudinal beam in the notch, the length of the horizontal direction of the first sleeve is smaller than the width of the horizontal direction of the upper opening groove, the longitudinal beam is connected with the left cross beam connecting plate and the right cross beam connecting plate through a first bolt piece and a second bolt piece, the first bolt piece comprises a first bolt and a first nut matched with the first bolt, the first bolt is located at the front portion in a lower opening groove of the middle cross beam, and the right portion of the first bolt sequentially penetrates through the left side wall of, The right crossbeam connecting plate, the first bolt right part department that stretches out the right crossbeam connecting plate has connect first nut soon, the second bolt spare include the second bolt and with the second nut of second bolt looks adaptation, the second bolt is in the lower opening inslot rear portion department of entablature, and the second bolt right part runs through left crossbeam connecting plate in proper order, longeron relevant position department left side wall, second sleeve pipe center through-hole, longeron relevant position department right side wall, right crossbeam connecting plate, the second bolt right part department that stretches out the right crossbeam connecting plate has connect the second nut soon.
3. The sojourn car sub-frame lightweight structure of claim 1, wherein: the longeron is preceding, the welding of rear end middle part department symmetry has vertical and along the preceding of arranging of left right direction, back longeron connecting plate top and the narrow backup pad top in a left side are at same level, back longeron connecting plate bottom and longeron bottom are at same level, back longeron connecting plate left end and the narrow backup pad left end parallel and level in a left side, back longeron connecting plate right-hand member and the narrow backup pad right-hand member parallel and level in a right side, back longeron connecting plate trailing flank is laminated with the preceding lateral surface of rear beam mutually, and the back longeron connecting plate passes through the bolt spare with the preceding lateral wall of rear beam and is connected, the back lateral surface of front longeron connecting plate and.
4. The sojourn car sub-frame lightweight structure of claim 1, wherein: the left and right lengths of the front cross beam, the middle cross beams and the rear cross beam are equal, a straight line formed by connecting lines of the left ends of the front cross beam, the middle cross beams and the rear cross beam is arranged along the front and rear direction, a straight line formed by connecting lines of the right ends of the front cross beam, the middle cross beams and the rear cross beam is arranged along the front and rear direction, and the distance between the right end of the longitudinal beam at the rightmost end and the right end of the middle cross beam in the horizontal and left and right directions is equal to the distance between the left end of the longitudinal beam at the leftmost end and.
5. The sojourn car sub-frame lightweight structure of claim 1, wherein: the bottom ends of the front cross beam, the middle cross beams and the rear cross beam are at the same horizontal height, the shapes, the structures and the sizes of the front cross beam and the rear cross beam are the same, and the shapes, the structures and the sizes of the front cross beam and the middle cross beams are the same.
6. The sojourn car sub-frame lightweight structure of claim 1, wherein: the number of the middle cross beams is two, and the number of the longitudinal beams is two.
7. The sojourn car sub-frame lightweight structure of claim 1, wherein: the left narrow supporting plate and the right narrow supporting plate are arranged in a bilateral symmetry mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921002368.6U CN210174976U (en) | 2019-07-01 | 2019-07-01 | Sojourn in car as a house sub vehicle frame lightweight structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921002368.6U CN210174976U (en) | 2019-07-01 | 2019-07-01 | Sojourn in car as a house sub vehicle frame lightweight structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210174976U true CN210174976U (en) | 2020-03-24 |
Family
ID=69839467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921002368.6U Expired - Fee Related CN210174976U (en) | 2019-07-01 | 2019-07-01 | Sojourn in car as a house sub vehicle frame lightweight structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210174976U (en) |
-
2019
- 2019-07-01 CN CN201921002368.6U patent/CN210174976U/en not_active Expired - Fee Related
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Granted publication date: 20200324 |