A linear track propulsion mechanism and a two-way integral expansion cabin

Abstract

The present invention relates to the technical field of mobile expansion cabins, specifically a linear track propulsion mechanism and a two-way integral expansion cabin, which are intended to solve the technical problem that existing integral expansion cabins are prone to jamming. A linear track propulsion mechanism is provided, including a first track frame and a movable shaft tube, a mounting plate and a roller frame are installed on the first track frame, a vertical shaft is installed on the mounting plate, a guide wheel is installed on the roller frame, a gear is installed on the vertical shaft, a rack is fixed in the movable shaft tube, and the gear and the rack are meshed; a two-way integral expansion cabin is also provided, a socket outer tube is provided under the main floor, a socket inner tube is provided at the bottom of the expansion cabin, the front and rear walls of the main cabin are connected to the front and rear walls of the expansion cabin by the aforementioned linear track propulsion mechanism, and the expansion cabin is equipped with a detachable, assembled or foldable expansion floor.

Description

Technical Field

[0001] The invention relates to the technical field of mobile expansion cabins, in particular to a linear track propulsion mechanism and a bidirectional integral expansion cabin. Background Art

[0002] A square cabin is a box structure made of solid materials. It has a very wide application market in the fields of military-civilian integration and industrial transportation, such as military medical square cabins, training and command square cabins, logistics support square cabins, exploration and field detection square cabins, square cabin transport vehicles, tourist square cabins, etc. Square cabins play an irreplaceable role in both national defense equipment and economic development. The biggest feature of square cabin functional equipment is its strong mobility, which can be quickly relocated as needed, and is especially suitable for emergency rescue and disaster relief and other sudden emergencies and strategic deployment. However, the existing square cabin equipment also has some defects: due to national traffic regulations, the maximum width of large and medium-sized motor vehicle bodies is 2.6 meters and 2.2 meters respectively. At present, the width of the inner diameter of the existing large square cabin body can only reach about 2.4 meters, and the width of the inner diameter of the medium-sized square cabin body can only reach about 2.2 meters. Due to the narrow internal space, the design layout and application effect of the square cabin are affected. In real-life applications, the required indoor space width is greater than 3.2 meters, especially many functional operations require a wider space. Therefore, many manufacturers have tried and improved various solutions for the space expansion of shelters, hoping to make progress and improvements in the expansion of shelter bodies. So far, although there are many examples of hard wall space expansion in the shelter industry, due to reasons such as expansion tracks and body structures, products are generally limited to small-scale expansion in a local range, and it is impossible to achieve the functional series development of shelter equipment, let alone pre-installation and maintenance of functional equipment. The bottleneck technology of space expansion has seriously affected the further development and application of shelter series equipment. Summary of the invention

[0003] The present invention aims to solve the technical problem that the existing integrally expandable square cabin is prone to jamming.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A linear track propulsion mechanism comprises a first track frame in the shape of a rectangular tube, a movable shaft tube is inserted through the internal gap of the first track frame, a rack arranged along the length direction of the movable shaft tube is fixed in the movable shaft tube, the tooth surface of the rack faces one side of the movable shaft tube and the portion of the side of the movable shaft tube corresponding to the rack is set as a strip-shaped notch, the other side of the movable shaft tube is fixedly connected with a connecting piece for connecting a moving piece, the first track frame is provided with a first sliding hole for avoiding sliding of the connecting piece, and two horizontally arranged mounting plates are protruded from the side of the first track frame corresponding to the strip-shaped notch, the two mounting plates are rotatably installed with a vertical shaft, and a positioning plate is fixed on the vertical shaft A gear is disposed between the two mounting plates, and a first through hole is provided on the side of the first track frame corresponding to the gear. The gear meshes with the rack after passing through the first through hole. The vertical shaft is connected to a power device that drives it to rotate. The upper and lower surfaces of the first track frame are both protruding with roller frames, and a guide wheel is rotatably installed on the roller frame. The axis of the guide wheel is horizontally arranged and perpendicular to the axis of the first track frame. A second through hole is provided on the upper and lower surfaces of the first track frame corresponding to the position of the guide wheel. After passing through the second through hole, the guide wheel abuts against the upper or lower surface of the movable shaft tube, and the wheel surface of the guide wheel is provided with a recess that matches the top or bottom of the movable shaft tube.

[0006] Furthermore, the rack is fixed in the movable shaft tube by at least two expansion sleeves, and the expansion sleeve includes a cylindrical shell shaped like a quadrangular prism. The so-called quadrangular prism is a shape formed by replacing each side edge of the quadrangular prism with a curved surface. One side surface of the cylindrical shell is concave to form a recess matched with the rack, and the rack is embedded in the recess. The curved surface of the cylindrical shell is divided into an elastic part and the rest is a non-deformable rigid part. The rigid part between every two adjacent elastic parts is provided with a screw hole, and the axial direction of the screw hole is perpendicular to the cylindrical wall of the cylindrical shell. The outer surface of the rigid part is evenly distributed with sharp teeth. A third through hole is opened at the position of the movable shaft tube corresponding to the screw hole, and the expansion sleeve is tightened to the inner wall of the movable shaft tube by a bolt that penetrates the third through hole and is screwed into the screw hole.

[0007] A two-way integral expandable square cabin comprises a main cabin and expansion cabins which are telescopically installed on the left and right sides of the main cabin, the main cabin is provided with a main floor, the lower surface of the main floor is fixed with a plurality of socket outer tubes arranged in the left and right directions, a plurality of socket inner tubes are fixedly connected to the bottom of the expansion cabin, the socket inner tubes are arranged corresponding to the socket outer tubes and are slidably inserted into the socket outer tubes, the inner surface of the front wall and the inner surface of the rear wall of the main cabin are respectively connected with the outer surface of the front wall and the outer surface of the rear wall of the expansion cabin through the aforementioned linear track propulsion mechanism, the movable shaft tubes are arranged in the left and right directions, the first track frame is fixed to the front wall or the rear wall of the main cabin, the connecting piece is fixed to the front wall or the rear wall of the expansion cabin, the left and right edges of the front wall and the left and right edges of the rear wall of the main cabin are provided with supporting wheel groups for supporting the corresponding movable shaft tubes, and the expansion cabin is provided with a foldable or detachable expansion floor.

[0008] Furthermore, at least one group of support wheels is rotatably installed on the lower part of the socket inner tube, and each group of support wheels includes two support wheels symmetrically located on both sides of the axis of the socket inner tube. The support wheels protrude from the socket inner tube and are rollingly supported on the bottom wall of the socket outer tube. At least one curved spring plate is also fixed on the socket inner tube, and an adjusting wheel is rotatably installed on the curved spring plate. The adjusting wheel protrudes from the socket inner tube and rolls against the top wall of the socket outer tube. The rolling directions of the support wheels and the adjusting wheels are consistent with the axial direction of the socket inner tube, and the elastic direction of the curved spring plate is in the up and down direction.

[0009] Furthermore, the top surface of the expansion cabin is arranged inclined to form a water-guiding surface, and a first sealing strip made of flexible material is fixed on the water-guiding surface, and a second sealing strip made of flexible material is fixed on the side wall of the expansion cabin, and a horizontally arranged mounting tube is fixed on the top side wall of the main cabin, and a notch is provided in the circumference of the mounting tube, and a rotating shaft is installed in the gap in the mounting tube, and the rotating shaft is integrally formed or fixedly connected with a sealing baffle, and the sealing baffle passes through the notch, and shaft heads are fixed at both ends of the mounting tube, and mounting columns with a diameter smaller than the rotating shaft are provided at both ends of the rotating shaft, and the mounting columns are rotatably inserted in the shaft heads, and a torsion spring is installed on the mounting column, one end of the torsion spring is inserted in the shaft head and the other end is inserted on the rotating shaft, and an annular groove is provided in the middle of the rotating shaft, and a positioning pin is radially inserted on the tube wall of the mounting tube, and the positioning pin is placed in the annular groove, and the sealing baffle overlaps the first sealing strip when the expansion cabin is extended and overlaps the second sealing strip when the expansion cabin is retracted.

[0010] Furthermore, card slots are provided on the upper edges, front edges and rear edges of the left and right sides of the main cabin, and inflatable sealing tubes are built into the card slots.

[0011] Furthermore, one end edge of the expansion floor is hinged on the inner wall of the expansion cabin, one end of the main floor that cooperates with the expansion floor is provided with a step, the other end edge of the expansion floor overlaps the step of the main floor and is provided with a buckle for locking, and a sealing gasket is provided at the overlap between the expansion floor and the main floor.

[0012] Furthermore, a worm gear is mounted on the lower end of the vertical shaft, and a transmission shaft is arranged horizontally and rotatably installed under the main floor between the two vertical shafts corresponding to the same expansion cabin. Worm sections are provided at both ends of the transmission shaft, and the worm wheel and the worm section are meshed to form a worm gear transmission pair, and the transmission shaft is connected to a motor that drives it to rotate.

[0013] Furthermore, the length of the movable shaft tube is consistent with the length of the front wall or the rear wall in the left-right direction, the front wall inner surface and the rear wall inner surface of the main cabin are respectively connected to the front wall outer surface and the rear wall outer surface of the expansion cabin through two linear track propulsion mechanisms distributed up and down, and the linear propulsion mechanisms corresponding to the two expansion cabins are staggered up and down, the vertical axis is located in the middle of the front wall or the rear wall of the main cabin, and the left and right edges of the front wall and the rear wall of the main cabin corresponding to the position of the movable shaft tube are fixed with a second track frame, the second track frame is provided with a second sliding hole for avoiding the sliding of the connecting piece, the upper surface and the lower surface of the second track frame are both protruding with roller frames, and the roller frames are rotatably installed with guide wheels, and the upper surface and the lower surface of the second track frame are provided with third through holes corresponding to the positions of the guide wheels, and the guide wheels abut against the upper surface or the lower surface of the movable shaft tube after passing through the third through holes.

[0014] Furthermore, a locking mechanism is also installed on the second track frame, and the locking mechanism includes a spring, a spring positioning pin, a strip rocker, a locking pin and a control handle. The side surface of the second track frame corresponding to the strip notch protrudes outwardly with two horizontally arranged connecting ear plates. The strip rocker plate surface is arranged vertically and the length direction is arranged horizontally. The strip rocker is located between the two connecting ear plates and two mounting ear plates are provided corresponding to the two connecting ear plates. The two mounting ear plates are respectively parallel to the two connecting ear plates and hinged. The two ends of the strip rocker are located on both sides of the connecting ear plates. The spring is fixed to the strip The locking pin is fixed on the plate surface of one end of the strip-shaped rocker and is opposite to the second track frame. The spring locating pin is fixed on the second track frame and corresponds to the spring. The locking pin is fixed on the plate surface of the other end of the strip-shaped rocker and is opposite to the second track frame. The end face of the locking pin is provided with teeth matching with the rack. The side face corresponding to the strip-shaped notch of the second track frame is also provided with a fourth through hole corresponding to the locking pin. The fourth through hole is larger than the size of the locking pin. In the natural state, the locking pin passes through the fourth through hole under the action of the spring and engages with the rack. The control handle is used to drive the strip-shaped rocker to rotate around the connecting ear plate.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a linear track propulsion mechanism, comprising a first track frame, a roller frame, a guide wheel, a vertical shaft and fixed parts such as gears, and also comprising moving parts such as a movable shaft tube and a rack. The movable shaft tube is supported by rolling by the guide wheels abutting against the top and bottom of the movable shaft tube, and the guide wheels are provided with recesses adapted to the top and bottom of the movable shaft tube, thereby ensuring the accuracy of the linear movement of the movable shaft tube and further ensuring the smooth movement. The movable shaft tube is driven by a gear driving the rack, the gear is mounted on the first track frame, the rack is embedded in the movable shaft tube, the movable part is fixedly connected to the movable shaft tube, the structural layout is reasonable, the occupied space is greatly saved, and it is particularly suitable for heavy-duty and large-stroke linear tracks.

[0017] The present invention also provides a two-way integral expansion cabin, the expansion cabin is supported by a socket pipe group located at the bottom, the expansion cabin is driven by the aforementioned linear track propulsion structure arranged on the front and rear walls, the first track frame and the connecting piece are respectively fixedly connected to the keels of the main cabin and the expansion cabin, and the whole structure has strong stability; the movable shaft tube is supported by the guide wheel and the supporting wheel group, on the one hand, the structural rigidity and plane accuracy of the cantilever structure are guaranteed, on the other hand, the synchronization and smooth effect of the expansion cabin extension are guaranteed, when the cabin body is in the return state of the extension stroke, the cabin body integral structural effect is formed, which can adapt to the driving of motor vehicles on complex roads, and overcome the distortion and destructive force of the cabin structure caused by the severe vibration and turbulence brought by the wild terrain. The cabin completes the high-quality expansion of the cabin space through the mechanical system, and realizes the space expansion rate of about one time, for example, the interior width of the large cabin car can reach as much as 5.0 meters, and the interior width of the medium-sized cabin car can also reach as much as 4.0 meters, which can adapt to more functional series functional cabin layout options. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of the linear track propulsion mechanism of the present invention;

[0020] Figure 2 is a schematic diagram of the related structure of the first track frame of the present invention;

[0021] Figure 3 It is a front view of the roller frame related structure of the present invention;

[0022] Figure 4 is a side view of the roller frame related structure of the present invention;

[0023] Figure 5 is a schematic diagram of the first track frame structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the vertical shaft installation structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the assembly of the expansion inner liner and the rack of the present invention;

[0026] Figure 8 It is the appearance diagram of the two-way integral expansion type shelter of the present invention;

[0027] Fig. 9 This is a schematic diagram of the telescopic state of the shelter of the present invention;

[0028] Fig.10 It is a front view of the assembly of the bell-and-spigot outer pipe and the bell-and-spigot inner pipe of the present invention;

[0029] Fig.11 It is a side view of the assembly of the bell-and-spigot outer pipe and the bell-and-spigot inner pipe of the present invention;

[0030] Fig.12 is a three-dimensional diagram of the sealing structure of the present invention;

[0031] Fig.13 is a schematic diagram of the overlapping structure between the connected baffles of the present invention;

[0032] Fig.14 is a front view of the sealing structure of the present invention;

[0033] Fig.15 is a side view of the sealing structure of the present invention;

[0034] Fig.16 It is a schematic diagram of the coordination of the main floor and the expansion floor of the present invention;

[0035] Fig.17 yes Fig.16 A partial enlarged view of the middle A;

[0036] Fig.18 The structure of the power device of the present invention is schematically shown in FIG. Figure 1 ;

[0037] Fig.19 The structure of the power device of the present invention is schematically shown in FIG. Figure 2 ;

[0038] Fig. 20 It is a preferred power distribution diagram of the present invention;

[0039] Fig.21 It is a schematic diagram of the relevant structure of the inflatable sealing tube of the present invention;

[0040] Fig. 22 is a side view of the overall frame of the present invention;

[0041] Fig.23 It is a schematic diagram of the socket structure of the chassis of the present invention;

[0042] Fig.24 is a schematic diagram of the relevant structure of the second track frame of the present invention;

[0043] Fig.25 is a schematic diagram of the locking mechanism of the present invention;

[0044] Fig.26 It is a distribution diagram of the locking mechanism of the present invention.

[0045] In the figure:

[0046] 1┄first track frame; 2┄moving shaft tube; 3┄rack; 4┄connecting piece; 5┄mounting plate; 6┄vertical shaft; 7┄gear; 8┄roller frame; 9┄guide wheel; 10┄cylinder shell; 11┄elastic part; 12┄rigid part; 13┄screw hole; 14┄pointed tooth; 15┄main cabin; 16┄expansion cabin; 17┄main floor; 18┄socket outer tube; 19┄socket inner tube; 20┄expansion floor; 21┄support wheel; 22┄curved spring plate; 23┄adjusting wheel; 24┄water guide surface; 25┄first sealing strip; 26┄second sealing strip; 27┄notch; 28┄torsion spring; 2 9┄installing tube; 30┄rotating shaft; 31┄sealing baffle; 32┄shaft head; 33┄installing column; 34┄annular groove; 35┄locating pin; 36┄installing groove; 37┄cover; 38┄worm wheel; 39┄transmission shaft; 40┄worm section; 41┄connecting block; 42┄bearing seat; 43┄bearing cover; 44┄slot; 45┄inflatable sealing tube; 46┄sealing wall; 47┄second track frame; 48┄spring; 49┄spring locating pin; 50┄bar rocker; 51┄locking pin; 52┄control handle; 53┄connecting ear plate; 54┄installing ear plate; 55┄flat square block. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] Reference Figures 1 to 5The present invention provides a linear track propulsion mechanism, comprising a first track frame 1 in a rectangular tubular shape, wherein a movable shaft tube 2 is inserted through the internal gap of the first track frame 1, wherein a rack 3 arranged along the length direction of the movable shaft tube 2 is fixed in the movable shaft tube 2, wherein the tooth surface of the rack 3 faces one side of the movable shaft tube 2 and the portion of the side of the movable shaft tube 2 corresponding to the rack 3 is set as a strip-shaped notch, and the other side of the movable shaft tube 2 is fixedly connected with a connecting member 4 for connecting a part to be moved, and the connecting member 4 can be selected according to the structure of the part to be moved, for example, a square tube or a strip plate can be selected; the first track frame 1 is provided with a first sliding hole for avoiding the sliding of the connecting member 4, and two horizontally arranged mounting plates 5 are protruded from the side of the first track frame 1 corresponding to the strip-shaped notch, and the two mounting plates 5 are in total A vertical shaft 6 is installed with rotation, and a gear 7 located between two mounting plates 5 is fixed on the vertical shaft 6. A first through hole is provided on the side of the first track frame 1 corresponding to the gear 7. The gear 7 meshes with the rack 3 after passing through the first through hole. The vertical shaft 6 is connected with a power device that drives it to rotate. The upper and lower surfaces of the first track frame 1 are both protruding with roller frames 8. A guide wheel 9 is rotatably installed on the roller frame 8. The axis of the guide wheel 9 is arranged horizontally and perpendicular to the axis of the first track frame 1. A second through hole is opened on the upper and lower surfaces of the first track frame 1 corresponding to the position of the guide wheel 9. After passing through the second through hole, the guide wheel 9 abuts against the upper or lower surface of the moving shaft tube 2, and the wheel surface of the guide wheel 9 is provided with a recess adapted to the top or bottom of the moving shaft tube 2. When working, the power device drives the vertical shaft 6 to rotate, the vertical shaft 6 drives the gear 7 to rotate, and the gear 7 drives the rack 3 to move, thereby driving the moving shaft tube 2 to move synchronously, and then driving the connecting member 4 to move synchronously, and finally realizing the movement of the moving member. Here is a preferred mounting structure of the vertical shaft 6 on the mounting plate 5: Figure 6 As shown, the upper surface of the upper mounting plate 5 and the lower surface of the lower mounting plate 5 are both provided with grooves, and a bearing seat 42 is embedded in the grooves. The bearing seat 42 is provided with a stepped hole arranged axially and vertically, and the large-diameter hole is located on the outside. A bearing is embedded in the large-diameter hole of the stepped hole, and the inner end face of the bearing abuts against the stepped surface. The outer end face of the large-diameter hole is provided with a bearing cap 43. The bearing cap 43 and the bearing seat 42 are fastened to the mounting plate 5 by screws, and the vertical shaft 6 passes through two bearings at the same time. Because the distance between the two mounting plates 5 is fixed, how to increase the distance between the two bearings to ensure the accuracy of the vertical shaft rotation is a technical problem that needs to be overcome. This solution increases the distance between the two bearings through the design of the bearing seat and the mounting plate structure and the relative position, thereby ensuring the transmission accuracy of the vertical shaft.

[0049] Reference Figure 7As a preferred fixing method of the rack 3 in the movable shaft tube 2, the rack 3 is fixed in the movable shaft tube 2 by at least two expansion sleeves, the expansion sleeve includes a cylindrical shell 10 of a quadrangular prism-like shape, the so-called quadrangular prism-like shape is a shape formed by replacing each side edge of the quadrangular prism with a curved surface, one side of the cylindrical shell 10 is concave to form a recess adapted to the rack 3, the rack 3 is embedded in the recess, and the rack 3 is fixed in the recess by common means such as bolts; the curved portion of the cylindrical shell 10 is divided into an elastic portion 11 and the rest is a non-deformable rigid portion 12, the rigid portion 12 between each two adjacent elastic portions 11 is provided with a screw hole 13, the axial direction of the screw hole 13 is perpendicular to the cylindrical wall of the cylindrical shell 10, the outer surface of the rigid portion 12 is uniformly distributed with sharp teeth 14, the movable shaft tube 2 is provided with a third through hole at the position corresponding to the screw hole 13, and the expansion sleeve is tightened to the inner wall of the movable shaft tube 2 by a bolt that penetrates the third through hole and is screwed into the screw hole 13. This structure is provided with an elastic part 11 for expansion. When in use, the rigid part 12 of the cylinder is fitted to the inner wall of the movable shaft tube 2 by twisting the bolts threaded in the screw holes 13, and the sharp teeth 14 are engaged with the inner wall of the movable shaft tube 2, so as to achieve the fixation of the expansion sleeve in the movable shaft tube 2. The expansion sleeve thickens the wall thickness of the movable shaft tube 2 and increases the length of the effective thread, so that the rack 3 is connected to the movable shaft tube 2 through the expansion sleeve bolts. In addition, due to the structural design of the expansion sleeve, the connector 4 can also be reliably connected to the movable shaft tube 2 through bolts. Specifically, a flange is added at the connection of the connector 4, and a through hole is opened on the flange. The bolts pass through the through hole and the third through hole in sequence and are then threaded into the screw hole 13, so that the reliable connection of the connector 4 is completed while the expansion sleeve is tightened.

[0050] Reference Figures 8 to 9 The present invention also provides a two-way integral expandable square cabin, including a main cabin 15 and an expansion cabin 16 which can be telescopically installed on the left and right sides of the main cabin 15. The main cabin 15 is provided with a main floor 17, and a plurality of socket outer tubes 18 arranged in the left and right directions are fixed to the lower surface of the main floor 17. A plurality of socket inner tubes 19 are fixedly connected to the bottom of the expansion cabin 16. The socket inner tubes 19 are arranged corresponding to the socket outer tubes 18 and are slidably inserted into the socket outer tubes 18. The front wall inner surface and the rear wall inner surface of the main cabin 15 are respectively connected to the front wall outer surface and the rear wall outer surface of the expansion cabin 16 through the aforementioned linear track propulsion mechanism. The first track frame 1 is fixed to the front wall or rear wall of the main cabin 15. Specifically, two connecting blocks 41 can be fixedly connected to the upper and lower surfaces of the first track frame 1, and then the connecting blocks 41 can be fixedly connected to the keel of the front wall or rear wall of the main cabin 15 to achieve the fixing of the first track frame 1. Figure 2 and Figure 4As shown; the connecting member 4 is fixed to the front wall or rear wall of the expansion cabin 16. Specifically, two connecting blocks can be fixedly connected to the upper and lower surfaces of the connecting member 1, and then the connecting blocks are fixedly connected to the keel of the front wall or rear wall of the expansion cabin 16 to achieve the fixation of the first track frame 1; the movable shaft tube 2 is arranged in the left and right directions, and the left and right edges of the front wall and the left and right edges of the rear wall of the main cabin 15 are provided with a supporting wheel group for supporting the corresponding movable shaft tube 2. The supporting wheel group is composed of two upper and lower supporting wheels, which are respectively used to abut the upper and lower surfaces of the movable shaft tube 2. This belongs to the conventional design of personnel in this field; the supporting wheel group can select the general shape of the supporting wheel 21, and it is preferred to design the supporting wheel 21 to be the same shape as the guide wheel 9, which can further guide while supporting; the expansion cabin 16 is provided with a foldable or detachable expansion floor 20. Because the expansion cabin 16 needs to be pulled out, the expansion floor must be removable or foldable. When in use, the support of the entire expansion cabin is completed by the socket pipe group, the guide wheel 9 and the supporting wheel group; the drive of the expansion cabin is realized by the power device. Preferably, as Fig.23 As shown, at least two groups of socket outer tubes 18 and socket inner tubes 19 have lengths equal to the width of the main cabin 15. In this way, when the expansion cabin 16 is fully expanded, half of the length of the socket inner tube 19 is still supported in the socket outer tube 18, and the structural rigidity is stronger.

[0051] Reference Figure 10 to Figure 11 As a preferred structure of the spigot and socket pipe group, at least one set of support wheels 21 is rotatably mounted on the lower part of the spigot and socket inner pipe 19, and each set of support wheels 21 includes two symmetrically separated on both sides of the axis of the spigot and socket inner pipe 19, the support wheels 21 are convex from the spigot and socket inner pipe 19 and are rollingly supported on the bottom wall of the spigot and socket outer pipe 18, and at least one curved spring plate 22 is fixed on the spigot and socket inner pipe 19, and an adjusting wheel 23 is rotatably mounted on the curved spring plate 22, which is convex from the spigot and socket inner pipe 19 and rollingly abuts against the top wall of the spigot and socket outer pipe 18, and the rolling directions of the support wheels 21 and the adjusting wheels 23 are consistent with the axial direction of the spigot and socket inner pipe 19, and the elastic direction of the curved spring plate 22 is in the up-down direction. The friction between the spigot and socket inner pipe 19 and the spigot and socket outer pipe 18 is changed from ordinary sliding to rolling, which greatly reduces the friction force, so that the friction between the entire expansion cabin 16 and the main cabin 15 is rolling friction, further improving the smoothness of pushing and pulling the expansion cabin.

[0052] Reference Figure 14 to Figure 15As a further improvement of the above technical solution, the top surface of the expansion cabin 16 is arranged obliquely to form a water guide surface 24, a first sealing strip 25 made of a flexible material is fixed on the water guide surface 24, a second sealing strip 26 made of a flexible material is fixed on the side wall of the expansion cabin 16, a horizontally arranged mounting tube 29 is fixed to the top side wall of the main cabin 15, a notch 27 is provided in the circumference of the mounting tube 29, a rotating shaft 30 is sleeved in the gap in the mounting tube 29, the rotating shaft 30 is integrally formed or fixedly connected with a sealing baffle 31, the sealing baffle 31 passes through the notch, and both ends of the mounting tube 29 A shaft head 32 is fixed to both ends of the rotating shaft 30. Mounting columns 33 with a diameter smaller than that of the rotating shaft 30 are provided. The mounting columns 33 are rotatably inserted into the shaft head 32. A torsion spring 28 is mounted on the mounting columns 33. One end of the torsion spring 28 is inserted and fixed in the shaft head 32 and the other end is inserted and fixed on the rotating shaft 30. An annular groove 34 is provided in the middle of the rotating shaft 30. A locating pin 35 is radially inserted on the tube wall of the mounting tube 29. The locating pin 35 is placed in the annular groove 34. The sealing baffle 31 overlaps the first sealing strip 25 when the expansion cabin 16 is extended and overlaps the second sealing strip 26 when the expansion cabin 16 is retracted. When in use, the expansion and contraction of the sealing baffle 31 is driven by the expansion chamber 16, and the tightness of the sealing baffle 31 and the sealing strip is ensured by the torsion spring 28: during the extension of the expansion chamber 16, the sealing baffle 31 rotates around the axis of the shaft 30, the shaft 30 rotates synchronously, the shaft head 32 and the mounting tube 29 are both fixed, which causes the torsion spring 28 to deform and generate a torque to reset the sealing baffle 31. For details, refer to Fig.12 In the front-to-back direction, multiple sealing baffles 31 overlap each other at the edges to cover the water guide surface 24. The specific overlapping method can be a labyrinth structure, such as Fig.13 shown.

[0053] Reference Fig.16 and Fig.17 As a preferred structure of the expansion floor 20, one end edge of the expansion floor 20 is hinged on the inner wall of the expansion cabin 16, one end of the main floor 17 that matches the expansion floor 20 is provided with a step, the other end edge of the expansion floor 20 overlaps the step of the main floor 17 and is provided with a buckle for locking, and a sealing gasket is provided at the overlap of the expansion floor 20 and the main floor 17. In order to save the space height occupied by the expansion floor when it is folded and unfolded, the expansion floor can be set at two ends or even three sections, and each two sections can be hinged.

[0054] As a preferred structure of the above-mentioned buckle, the surface of the expansion floor 20 is provided with a mounting groove 36, and the mounting groove 36 is provided with a cover 37. The step of the main floor 17 is provided with a socket. The mounting groove 36 is elastically and retractably provided with a latch, and the latch can pass through the expansion floor 20 and then be inserted into the socket. When the expansion floor 20 needs to be folded, the cover 37 is opened, the latch is pulled out of the socket, and the floor is lifted off the step; when the expansion floor 20 needs to be fixed, the latch is first adjusted to a retracted state, and then the expansion floor is overlapped on the step of the main floor 17, and finally the latch is pushed into the socket. Specifically, a spring can be added between the latch and the mounting groove 36 to facilitate the automatic resetting of the latch. Specifically, a handle can be installed on the latch to facilitate the pushing and pulling of the latch. The cover 37 is preferably installed on the expansion floor 20 in a hinged manner.

[0055] Reference Figure 18 to Figure 19 As a preferred structure of the power device, a worm gear 38 is mounted on the lower end of the vertical shaft 6. A transmission shaft 39 arranged horizontally and rotatably mounted below the main floor 17 is provided between the two vertical shafts 6 corresponding to the same expansion cabin 16. A worm segment 40 is provided at both ends of the transmission shaft 39. The worm gear 38 and the worm segment 40 mesh to form a worm gear transmission pair. The transmission shaft 39 is connected to a motor that drives it to rotate. The motor drives the transmission shaft 39 to rotate, and then drives the worm segment 40 to rotate, thereby driving the worm gear 38 to rotate, and finally realizing the rotation of the vertical shaft 6.

[0056] Reference Fig.21 , there are slots 44 on the upper edges, front edges and rear edges of the left and right sides of the main cabin, and an inflatable sealing tube 45 is built into the slots 44. When the expansion cabin 16 is extended or retracted into the main cabin 15, the inflatable sealing tube 45 is inflated and expanded in the slots 44 to achieve sealing between the main cabin 15 and the expansion cabin 16. Fig. 22 The front and rear side walls of the expansion cabin 16 are hollow, and vertically arranged sealing walls 46 are provided at the front and rear edges of the main floor 17. Card grooves 44 are also provided on the front and rear edges of the left and right sides of the sealing wall 46, and the card grooves 44 have built-in inflation sealing tubes 45.

[0057] It is clear to those skilled in the art that the rigid components such as the first track frame 1 , the roller frame 8 and the vertical shaft 6 in the present invention need to be made of materials such as metal to meet the requirements of structural strength.

[0058] Reference Fig. 20The length of the movable shaft tube 2 is consistent with the length of the front wall or the rear wall in the left and right directions. The front wall inner surface and the rear wall inner surface of the main cabin 15 are respectively connected to the front wall outer surface and the rear wall outer surface of the expansion cabin 16 through two linear track propulsion mechanisms distributed up and down, and the linear propulsion mechanisms corresponding to the two expansion cabins 16 are staggered up and down. The vertical axis 6 is located in the middle of the front wall or the rear wall of the main cabin 15. The left and right edges of the front wall and the rear wall of the main cabin 15 corresponding to the position of the movable shaft tube 2 are fixed with a second track frame 47. The second track frame 47 is provided with a second sliding hole for avoiding the sliding of the connecting member 4. The upper and lower surfaces of the second track frame 47 are both protruding with roller frames 8, and the roller frames 8 are rotatably installed with guide wheels 9. The upper and lower surfaces of the second track frame 47 are provided with third through holes corresponding to the positions of the guide wheels 9. After passing through the third through holes, the guide wheels 9 abut against the upper or lower surface of the movable shaft tube 2. No matter what state such a structure is in, the movable shaft tube is supported by two sets of guide wheels 9, which greatly improves the rigidity of the structure and is particularly suitable for long-stroke heavy-duty rails.

[0059] Reference Figure 24-26As a further improvement of the above technical solution, a locking mechanism is also installed on the second track frame 47, and the locking mechanism includes a spring 48, a spring positioning pin 49, a strip rocker 50, a locking pin 51 and a control handle 52. The side of the corresponding strip notch of the second track frame 47 protrudes with two horizontally arranged connecting ear plates 53. The strip rocker 50 is arranged vertically and horizontally in the length direction. The strip rocker 50 is located between the two connecting ear plates 53 and two mounting ear plates 54 are provided corresponding to the two connecting ear plates 53. The two mounting ear plates 54 are respectively parallel to the two connecting ear plates 53 and hinged. The two ends of the strip rocker 50 are located on both sides of the connecting ear plates 53. The spring 48 is fixed on the plate surface of one end of the strip seesaw 50 and is opposite to the second track frame 47, the spring positioning pin 49 is fixed on the second track frame 47 and corresponds to the spring 48, the locking pin 51 is fixed on the plate surface of the other end of the strip seesaw 50 and is opposite to the second track frame 47, the end surface of the locking pin 51 is provided with teeth matching with the rack 3, and the side surface corresponding to the strip notch of the second track frame 47 is also provided with a fourth through hole corresponding to the locking pin 51, the fourth through hole is larger than the size of the locking pin 51, and the locking pin 51 passes through the fourth through hole and meshes with the rack 3 under the action of the spring 48 in the natural state, and the control handle 52 is used to drive the strip seesaw 50 to rotate around the connecting ear plate 53. Due to the huge structure of the cabin, the locking of the gear alone may fail, so a locking mechanism is added. When the expansion cabin 16 is retracted or expanded, the control handle 52 is pulled to disengage the locking pin 51 from the rack, and the locking effect is lost; when the expansion cabin 16 is retracted or expanded to the final position, the control handle 52 is reset, and under the action of the spring 48, the locking pin 51 engages with the rack 3, achieving a further locking effect. Furthermore, in order to reduce the weight of the overall structure, the rack 3 can be set only to correspond to part of the movable shaft tube 2. For the left expansion cabin, the rack 3 only needs to correspond to the distance between the first track frame 1 and the second track frame 47 on the right; for the right expansion cabin, the rack 3 only needs to correspond to the distance between the first track frame 1 and the second track frame 47 on the left. However, this structure requires that when the expansion cabin 16 is in the retracted state, a locking hole is opened at the position of the movable shaft tube corresponding to the locking pin 51; taking the left expansion cabin as an example, when the expansion cabin 16 is retracted, the locking pin 51 on the right side is locked by meshing with the rack 3, and the locking pin 51 on the left side is locked by cooperating with the locking hole; when the expansion cabin 16 is extended, the locking mechanism on the right side fails, and the locking mechanism on the left side is locked by cooperating with the locking pin 51 and the rack 3. Furthermore, in order to facilitate the state maintenance of the bar rocker 50, a flat square block 55 is rotatably installed on the side of the second track frame 47, and the flat square block 55 contacts the bar rocker 50. The rotation of the flat square block 55 realizes the rotation of the bar rocker 50 around the connecting ear plate 53, and the control handle 52 is fixedly connected to the flat square block 55 to drive the flat square block 55 to rotate.Furthermore, in order to facilitate maintenance and installation, a base plate may be first fixed on the second track frame 47, and then the lug plates 53 may be protruded outwardly from the base plate.

[0060] The same or similar numbers in the drawings of the embodiments correspond to the same or similar parts; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0061] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A two-way integrally expandable square cabin, comprising a main cabin (15) and expansion cabins (16) retractably mounted on the left and right sides of the main cabin (15), the main cabin (15) being provided with a main floor (17), characterized in that: A plurality of socket outer tubes (18) arranged in a left-right direction are fixed to the lower surface of the main floor (17); a plurality of socket inner tubes (19) are fixedly connected to the bottom of the expansion cabin (16); the socket inner tubes (19) are arranged corresponding to the socket outer tubes (18) and are slidably inserted into the socket outer tubes (18); the front wall inner surface and the rear wall inner surface of the main cabin (15) are respectively connected to the front wall outer surface and the rear wall outer surface of the expansion cabin (16) through a linear track propulsion mechanism; the linear track propulsion mechanism comprises a rectangular tubular first track frame (1); a movable shaft tube (2) is inserted into the internal gap of the first track frame (1); a rack (3) arranged along the length direction of the movable shaft tube (2) is fixed in the movable shaft tube (2); the tooth surface of the rack (3) faces the movable shaft tube (2) ) and a portion of the side of the movable shaft tube (2) corresponding to the rack (3) is provided with a strip-shaped notch, the other side of the movable shaft tube (2) is fixedly connected to a connecting piece (4) for connecting a moving piece, the first track frame (1) is provided with a first sliding hole for avoiding sliding of the connecting piece (4), the side of the first track frame (1) corresponding to the strip-shaped notch is protruded with two horizontally arranged mounting plates (5), the two mounting plates (5) are rotatably mounted with a vertical shaft (6), a gear (7) located between the two mounting plates (5) is fixed on the vertical shaft (6), a first through hole is provided on the side of the first track frame (1) corresponding to the gear (7), the gear (7) is meshed with the rack (3) after passing through the first through hole, and the vertical shaft (6) is connected to a power device for driving it to rotate, The first track frame (1) has roller frames (8) protruding from the upper and lower surfaces thereof. A guide wheel (9) is rotatably mounted on the roller frame (8). The axis of the guide wheel (9) is arranged horizontally and is perpendicular to the axis of the first track frame (1). Second through holes are provided on the upper and lower surfaces of the first track frame (1) at positions corresponding to the guide wheels (9). After passing through the second through holes, the guide wheels (9) abut against the upper or lower surface of the movable shaft tube (2). The wheel surface of the guide wheel (9) is provided with a recessed portion adapted to the top or bottom of the movable shaft tube (2). The rack (3) is fixed in the movable shaft tube (2) by at least two expansion inner bushings. The expansion inner bushings include a cylindrical shell (10) shaped like a quadrangular prism. The so-called quadrangular prism means that each side edge of the quadrangular prism is The cylindrical shell (10) is formed by replacing the cylindrical shell with a curved surface, one side surface of the cylindrical shell (10) is concave to form a concave portion adapted to the rack (3), the rack (3) is embedded in the concave portion, the curved surface portion of the cylindrical shell (10) is divided into an elastic portion (11) and the remaining portion is a non-deformable rigid portion (12), a screw hole (13) is provided in the rigid portion (12) between every two adjacent elastic portions (11), the axial direction of the screw hole (13) is perpendicular to the cylindrical wall of the cylindrical shell (10), the outer surface of the rigid portion (12) is uniformly distributed with sharp teeth (14), a third through hole is opened at a position corresponding to the screw hole (13) of the movable shaft tube (2), the expansion inner bushing is tightened to the inner wall of the movable shaft tube (2) by a bolt that penetrates the third through hole and is screwed into the screw hole (13), and the movable shaft tube (2) is arranged in the left and right directions,The first track frame (1) is fixed to the front wall or the rear wall of the main cabin (15), the connecting member (4) is fixed to the front wall or the rear wall of the expansion cabin (16), the left and right edges of the front wall and the left and right edges of the rear wall of the main cabin (15) are both provided with supporting wheel groups for supporting the corresponding movable shaft tube (2), the expansion cabin (16) is provided with a foldable or detachable expansion floor (20), the length of the movable shaft tube (2) is consistent with the length of the front wall or the rear wall in the left and right direction, the front wall inner surface and the rear wall inner surface of the main cabin (15) are respectively connected to the front wall outer surface and the rear wall outer surface of the expansion cabin (16) through two linear track propulsion mechanisms distributed up and down, and the linear propulsion mechanisms corresponding to the two expansion cabins (16) are staggered up and down, and the vertical shaft (6) is located at the main cabin (15). A second track frame (47) is fixed at the middle of the front wall or the rear wall, at the left and right edges of the front wall and the rear wall of the main cabin (15) corresponding to the position of the movable shaft tube (2), the second track frame (47) is provided with a second sliding hole for avoiding the sliding of the connecting member (4), the upper surface and the lower surface of the second track frame (47) are both protruding with a roller frame (8), and a guide wheel (9) is rotatably mounted on the roller frame (8), and a third through hole is opened at the upper surface and the lower surface of the second track frame (47) corresponding to the position of the guide wheel (9), and the guide wheel (9) abuts against the upper surface or the lower surface of the movable shaft tube (2) after passing through the third through hole, and a locking mechanism is also installed on the second track frame (47), and the locking mechanism includes a spring (48), a spring positioning pin (49), and a strip warping The strip rocker (50) is provided with a plate (50), a locking pin (51) and a control handle (52); two horizontally arranged connecting ear plates (53) are protruded from the side surface corresponding to the strip notch of the second track frame (47); the plate surface of the strip rocker (50) is arranged vertically and the length direction is arranged horizontally; the strip rocker (50) is located between the two connecting ear plates (53) and two mounting ear plates (54) are provided corresponding to the two connecting ear plates (53); the two mounting ear plates (54) are respectively parallel to the two connecting ear plates (53) and hinged; the two ends of the strip rocker (50) are located on both sides of the connecting ear plates (53); a spring (48) is fixed on the plate surface at one end of the strip rocker (50) and is opposite to the second track frame (47); a spring positioning pin (49) is fixed on the second track frame (47); Corresponding to the spring (48), the locking pin (51) is fixed on the other end plate surface of the strip-shaped seesaw (50) and is opposite to the second track frame (47). The end surface of the locking pin (51) is provided with teeth that match the rack (3). The side surface of the second track frame (47) corresponding to the strip-shaped notch is also provided with a fourth through hole corresponding to the locking pin (51). The fourth through hole is larger than the size of the locking pin (51). In a natural state, the locking pin (51) passes through the fourth through hole under the action of the spring (48) and meshes with the rack (3). The control handle (52) is used to drive the strip-shaped seesaw (50) to rotate around the connecting ear plate (53). The upper edge, front edge and rear edge of the left and right sides of the main cabin (15) are all provided with a card slot (44), and the card slot (44) has an inflatable sealing tube built in.

2. A two-way integrally expandable shelter according to claim 1, characterized in that: At least one group of support wheels (21) is rotatably mounted on the lower part of the socket inner tube (19), each group of support wheels (21) comprises two support wheels symmetrically located on both sides of the axis of the socket inner tube (19), the support wheels (21) protrude from the socket inner tube (19) and are supported by rolling on the bottom wall of the socket outer tube (18), at least one curved spring plate (22) is fixed on the socket inner tube (19), an adjusting wheel (23) is rotatably mounted on the curved spring plate (22), the adjusting wheel (23) protrudes from the socket inner tube (19) and is in rolling contact with the top wall of the socket outer tube (18), the rolling directions of the support wheels (21) and the adjusting wheels (23) are both consistent with the axial direction of the socket inner tube (19), and the elastic force direction of the curved spring plate (22) is in the up-down direction.

3. The two-way integrally expandable shelter according to claim 1, characterized in that: The top surface of the expansion cabin (16) is arranged obliquely to form a water guide surface (24), a first sealing strip (25) made of a flexible material is fixed on the water guide surface (24), a second sealing strip (26) made of a flexible material is fixed on the side wall of the expansion cabin (16), a horizontally arranged mounting tube (29) is fixed on the top side wall of the main cabin (15), a notch (27) is provided in the circumferential direction of the mounting tube (29), a rotating shaft (30) is sleeved in the gap inside the mounting tube (29), the rotating shaft (30) is integrally formed with or fixedly connected to a sealing baffle (31), the sealing baffle (31) passes through the notch, shaft heads (32) are fixed at both ends of the mounting tube (29), and the rotating shaft ( Both ends of the rotating shaft (30) are provided with mounting columns (33) having a diameter smaller than that of the rotating shaft (30), the mounting columns (33) are rotatably inserted into the shaft head (32), a torsion spring (28) is sleeved on the mounting columns (33), one end of the torsion spring (28) is inserted and fixed in the shaft head (32) and the other end is inserted and fixed on the rotating shaft (30), an annular groove (34) is provided in the middle of the rotating shaft (30), a positioning pin (35) is radially inserted on the tube wall of the mounting tube (29), the positioning pin (35) is placed in the annular groove (34), and the sealing baffle (31) overlaps the first sealing strip (25) when the expansion chamber (16) is extended and overlaps the second sealing strip (26) when the expansion chamber (16) is retracted.

4. The two-way integrally expandable shelter according to claim 1, characterized in that: One end edge of the expansion floor (20) is hinged on the inner wall of the expansion cabin (16); one end of the main floor (17) that matches the expansion floor (20) is provided with a step; the other end edge of the expansion floor (20) is overlapped on the step of the main floor (17) and is provided with a buckle for locking; and a sealing gasket is provided at the overlap of the expansion floor (20) and the main floor (17).

5. The two-way integrally expandable shelter according to claim 1, characterized in that: A worm wheel (38) is mounted on the lower end of the vertical shaft (6). A transmission shaft (39) is arranged horizontally and rotatably mounted below the main floor (17) between the two vertical shafts (6) corresponding to the same expansion cabin (16). Worm sections (40) are provided at both ends of the transmission shaft (39). The worm wheel (38) and the worm section (40) mesh with each other to form a worm gear transmission pair. The transmission shaft (39) is connected to a motor for driving the transmission shaft to rotate.

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