CN105040819A - Telescopic shed - Google Patents

Abstract

The invention discloses a telescopic shed which comprises at least two shed units; at least two shed units are nested, and two adjacent nested shed units are connected in a sliding manner; a guide mechanism and a limiting mechanism are arranged between two adjacent shed units; the guide mechanism comprises a guide groove and a guide rail, and a sliding groove is arranged between the guide rail and the connected shed unit; the limiting mechanism comprises a first limiting part and a second limiting part, the first limiting part is installed in the guide groove and located at one end of the guide groove, and the first limiting part extends into the sliding groove. The sliding stability between two adjacent shed units can be ensured through the guide mechanism; the guide rail can be limited in the guide groove by the first limiting part, so that the guide rail is prevented from falling out of the guide groove; the two second limiting parts are detachably fixedly connected to the openings at the two ends of the sliding groove, the first limiting part can be limited in the sliding groove, the mutual separation of the two shed units is avoided, and the limiting mechanism and the guide mechanism are convenient to assemble and connect.

Description

Telescopic shed

technical field

The invention relates to the field of portable sheds, in particular to a telescopic shed.

Background technique

In the prior art, the sheds for sheltering from wind, rain and sunlight and providing temporary residence are mostly made of canvas, and together with the supporting things, they can be removed and transferred at any time. The shed is carried in parts and assembled after arriving at the site, so various parts and tools are required. Only by knowing the names and usage methods of each part and being familiar with the structure of the shed can the shed be set up quickly and conveniently. At present, the sheds used by people generally do not have a telescopic function, which makes it inconvenient to build the sheds, and is not conducive to the assembly of the various parts of the sheds.

Contents of the invention

The purpose of the present invention is to provide a telescopic shed, which has a simple structure, good stability in telescopic transformation, can avoid separation between shed units, is easy to use, and is easy to assemble.

In order to solve the above technical problems, the present invention provides a telescopic shed, including at least two shed units; said at least two shed units are nested, and two adjacent nested shed units are slidably connected; said The end of the shed unit in the sliding direction is arched;

A guide mechanism and a limit mechanism are provided between two adjacent shed units; the guide mechanism includes a sliding fit guide groove and a guide rail, and the guide groove and the guide rail are respectively arranged on two adjacent shed units. on; a sliding groove is provided between the guide rail and the connected shed unit;

The limiting mechanism includes a first limiting member and a second limiting member, the first limiting member is installed in the guide groove and is located at one end of the guide groove, the first limiting member Extending into the sliding groove; the second limiter is two, respectively detachably fixed at two ends of the sliding groove.

Wherein, the second limiting part includes a base body, a limiting part and a clamping part, and both the limiting part and the clamping part are fixed on the base body; the limiting part is used to cooperate with the first A limit piece abuts against each other; the second shed unit is provided with a clamping groove, and the clamping part is clamped in the clamping groove; the side of the clamping part is provided with a limiting groove, and the clamping part A limiting flange is arranged on the groove wall of the groove, and the limiting flange is inserted into the limiting groove.

Wherein, there are two limiting grooves, which are respectively arranged on two opposite sides of the clamping part; there are two limiting flanges, which are respectively arranged on two opposite groove walls of the clamping groove. .

Wherein, the clamping groove is T-shaped or L-shaped.

Wherein, there are two clamping parts, and the two clamping parts and the limiting part are arranged along the same direction.

Wherein, the second limiting member is flat as a whole.

Wherein, a sliding wheel is provided between the guide rail and the guide groove.

Wherein, the cross section of the guide rail is L-shaped or arc-shaped.

Wherein, the shed unit includes two arched support frames, a plurality of connecting rods, and a plurality of guard plates, the two support frames are arranged oppositely, and the two ends of each of the connecting rods are respectively fixedly connected to the two The support frame; each of the guard plates is fixed in the middle of the frame formed by the support rod and the connecting rod;

Both the guiding mechanism and the limiting mechanism are arranged on the connecting rods of two adjacent shed units.

Wherein, the telescopic shed further includes a driving device installed on the outermost or innermost shed unit for driving the at least two shed units to slide relative to each other to achieve expansion and contraction.

The telescopic shed provided by the present invention can ensure the stability of sliding between two adjacent shed units through the guide mechanism; through the cooperation of the first limiting member and the sliding groove, the guide rail can be limited in the guide groove by the first limiting member In this way, the guide rail is prevented from coming out of the guide groove; the cooperation between the first limiting member and the two second limiting members can be used to limit the first limiting member in the sliding groove, so as to avoid the interaction between the two shed units during the sliding process. Separation; the second limiting member is detachably fixedly connected to the openings at both ends of the sliding groove, which facilitates the assembly and connection of the limiting mechanism and the guiding mechanism.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is a three-dimensional schematic view of the telescopic shed provided in the first embodiment of the present invention in an unfolded state;

Fig. 2 is a schematic side view of the telescopic shed in Fig. 1;

Fig. 3 is a schematic diagram of the telescopic shed in Fig. 1 in a retracted state;

Fig. 4 is a schematic diagram of the connection structure at A in Fig. 1;

Fig. 5 is a schematic diagram of cooperation between the guide rail and the guide groove in Fig. 4;

Fig. 6 is a schematic diagram of the connection between the second clamping member and the second shed unit in Fig. 4;

Fig. 7 is a schematic diagram of the second clip in Fig. 6;

Fig. 8 is a schematic diagram of the clamping plate in Fig. 4;

Fig. 9 is a schematic diagram of the telescopic shed provided by the second embodiment of the present invention in an unfolded state.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Please refer to FIG. 1 to FIG. 3 , the telescopic shed 10 provided by the first embodiment of the present invention includes three shed units 100 , 200 , 300 . The three shed units are nested sequentially from outside to inside.

For ease of description, the three shed units are respectively named as the first shed unit 100 , the second shed unit 200 and the third shed unit 300 from outside to inside. The shapes of the first shed unit 100 , the second shed unit 200 and the third shed unit 300 are basically the same, and their sizes increase sequentially from the inside to the outside, so that the three are nested together. The adjacent nested first shed unit 100 is slidably connected to the second shed unit 200, and the adjacent nested second shed unit 200 is slidably connected to the third shed unit 300, so that the first shed unit 100, the second shed unit The shed unit 200 and the third shed unit 300 can slide relative to each other, so as to change the overall size of the three and realize expansion and contraction.

The shapes and structures of the first shed unit 100 , the second shed unit 200 and the third shed unit 300 are basically the same, and the specific structure will be described below taking the first shed unit 100 as an example.

As shown in FIG. 1 , the end of the first shed unit 100 in the sliding direction is arched to form a certain inner space, and can be covered on a certain ground area. The first shed unit 100 includes two arched supporting frames 1, a plurality of connecting rods 2 and a plurality of guard plates (not shown in the figure), the two supporting frames 1 are arranged oppositely, and the two ends of each connecting rod 2 are respectively Fixedly connected to two support frames 1 . In this embodiment, the support frame 1 may be in the shape of a zigzag arch, so as to facilitate the processing and preparation of the support frame 1 . Further, the support frame 1 includes at least two support rods 11, and all the support rods 11 are sequentially connected end to end to form a zigzag arch. Specifically, each support frame 1 includes six support rods 11 . Of course, in other embodiments, the number of support rods 11 can also be two, and the two support rods 11 can be connected to form a triangular arch, and the number of support rods 11 can also be three or other numbers; the support frame 1 can also be arc-shaped arched . Preferably, each support rod 11 is in the shape of a square tube to improve the structural strength of the support frame 1 and is light in weight, which facilitates the sliding of the shed unit and the overall movement of the telescopic shed 10 .

Each guard plate is fixed in the middle of the frame formed by the supporting rod 11 and the connecting rod 2 to close the frame formed by the supporting rod 11 and the connecting rod 2 . The number of guard plates can be determined according to the number of frames formed by the support rods 11 and the connecting rods 2 . The two side surfaces and the top surface of the first shed unit 100 can be sealed by using the guard plate to keep out wind and rain. The protective plate is preferably a transparent plate such as a toughened glass plate, a glass plate, or a transparent acrylic plate, so as to ensure lighting in the telescopic shed 10 .

As shown in Fig. 4 and Fig. 5, a guiding mechanism 3 and a position limiting mechanism are arranged between adjacent two shed units. On the adjacent two shed units, the stability of sliding between the adjacent two shed units can be ensured by the guide mechanism 3 . The guide rail 32 extends into the guide groove 31, and a sliding groove 20 is provided between the guide rail 32 and the connected shed unit, and the two ends of the sliding groove 20 are open. The limiter mechanism includes a first limiter 41 and a second limiter 42. The first limiter 41 is installed on the wall of the guide groove 31 and is located at one end of the guide groove 31. The first limiter 41 extends to the sliding groove 20; there are two second limiting members 42, which are respectively detachably fixed at the openings at both ends of the sliding groove 20. Through the cooperation of the first limiting member 41 and the sliding groove 20, the sliding fit between the guide groove 31 and the guide rail 32 can be facilitated, and the first limiting member 41 can be used to limit the guide rail 32 in the guide groove 31, preventing the guide rail 32 from moving from the guide rail 32. out of slot 31. Utilize the cooperation of the first limiting member 41 and the two second limiting members 41, the first limiting member 41 can be limited in the sliding groove 20, and the mutual separation of the two shed units during the sliding process can be avoided; the second limiting The part 41 is detachably fixedly connected to the openings at both ends of the sliding groove 20, which can facilitate the assembly and connection of the limiting mechanism and the guiding mechanism. In this embodiment, the guiding mechanism and the limiting mechanism will be described in detail below by taking the cooperation between the first shed unit 100 and the second shed unit 200 as an example.

The guide groove 31 is arranged on the first shed unit 100 , and the guide rail 32 is arranged on the second shed unit 200 . The guide rail 32 extends into the guide groove 31 , and the sliding groove 20 is formed between the guide rail 32 and the connected second shed unit 200 .

Both the guide rail 32 and the guide groove 31 are elongated along the sliding direction of the first shed unit 100 . Preferably, both ends of the guide groove 31 in the length direction are open, so that the guide rail 32 can enter the guide groove 31 from the openings at both ends of the guide groove 31 . The guide groove 31 has a first groove wall 311, a second groove wall 312 and a third groove wall 313, the first groove wall 311 is opposite to the second groove wall 312, and the third groove wall 313 is connected between the first groove wall 311 and the second groove wall 313. Between the two groove walls 312, the cross section of the guide groove 31 can be C-shaped or U-shaped.

The sliding slot 20 has a long opening facing the first slot wall 311 . The first groove wall 311 is provided with a guide piece 314, and the guide piece 314 passes through the elongated opening and extends into the sliding groove 20, so that the guide piece 314 is located between the guide rail 32 and the second shed unit 200, and the guide rail 314 is used to guide the guide rail 32 is limited in the guide groove 31, so as to prevent the guide rail 32 from coming out of the guide groove 31 during the relative sliding process of the guide rail 32 and the guide groove 31. Both ends of the sliding groove 20 are open, so that the guide piece 314 enters into the sliding groove 20 from both ends of the sliding groove 20 . In this embodiment, preferably, the cross-section of the guide rail 32 is L-shaped, one arm of which is fixedly connected to the second shed unit 200 , and a sliding groove 20 is formed between the other arm and the second shed unit 200 . Here, in other embodiments, the cross section of the guide rail 32 may also be arc-shaped or other shapes, so that a sliding slot 20 may be formed between the guide rail 32 and the second shed unit 200 .

Preferably, both the guide rail 32 and the guide groove 31 are profiles, so as to facilitate processing and preparation. In this embodiment, the guide rail 32 is arranged on the connecting rod 2 at the bottom of the second shed unit 200, and the two are integrally formed to improve the structural strength of the two. The guide groove 31 is arranged on the connecting rod 2 at the bottom of the first shed unit 100, and the two are integrally formed, which can improve the structural strength of the connection between the two. A sliding wheel 33 is provided between the guide rail 32 and the guide groove 31 to reduce the sliding friction between the guide rail 32 and the guide groove 31 .

As shown in Figure 4 and Figure 6, the limit mechanism is used to limit the relative movement between two adjacent shed units. The limiting mechanism includes a first limiting member 41 and a second limiting member 42, and the second limiting member 42 is two, respectively installed at the two ends of the sliding groove 20 of the second shed unit 200; the first limiting member 41 is slidably disposed between two second limiting members 42, and the first limiting member 41 is installed on the guide groove of another adjacent first shed unit. When the telescopic shed 10 is in the expanded state or the retracted state, the first limiting member 41 abuts against the two second limiting members 42 respectively. In this embodiment, a limit mechanism is also provided between the second shed unit 200 and the third shed unit 300, and the two second limit members of the limit mechanism are respectively arranged at both ends of the sliding groove of the third shed unit 300 , The first limiting member is arranged on one end of the guide groove of the second shed unit 200 .

When changing the telescopic shed 10 from the retracted state to the unfolded state, the first shed unit 100 slides away from the second shed unit 200 , and when the first stopper 41 abuts against the first end of the second shed unit 200 When the second stopper 42 is used, the first shed unit 100 and the second shed unit 200 slide relatively so that the two are in an extended state, that is, the overall length of the two is the largest, and the first shed unit 100 continues to slide to make the first shed unit 200 extend. The first stopper 41 on the shed unit 100 acts on the second stopper 42 at the first end of the second shed unit 200, thereby driving the second shed unit 200 to slide together, the first shed unit 100 and the second shed unit 200 It can slide relative to the third shed unit 300 at the same time, so that the third shed unit 300 moves out of the second shed unit 200 , when the first stopper 41 on the second shed unit 200 abuts against the second end of the third shed unit 300 . When the stopper 42 is closed, the first shed unit 100 and the second shed unit 200 stop sliding, and the entire telescopic shed 10 is fully unfolded.

When the telescopic shed 10 is transformed from the unfolded state to the retracted state, the first shed unit 100 slides toward the direction close to the second shed unit 200, and when the first stopper 41 on the first shed unit 100 abuts against the second shed unit When the second stopper 42 at the second end of the unit 200 is installed, the second shed unit 200 is completely nested in the first shed unit 100, and the first shed unit 100 and the second shed unit 200 are in a retracted state, that is, both Overall length is minimal. The first shed unit 100 continues to slide toward the third shed unit 300 so that the first stopper 41 on the first shed unit 100 acts on the second stopper 42 on the second end of the second shed unit 200 , the second stopper 42 on the second end of the second shed unit 200 A shed unit 100 can drive the second shed unit 200 to slide towards the third shed unit 300 , so that the third shed unit 300 moves into the second shed unit 200 . When the first stopper 41 on the second shed unit 200 abuts against the second stopper at the other end of the third shed unit 300, the third shed unit 300 is completely nested in the second shed unit 200, the first The shed unit 100 , the second shed unit 200 , and the third shed unit 300 are completely nested together, and the lengths of the three are the shortest at this time, and the telescopic shed 10 is in a retracted state.

In this embodiment, the first limiting member 41 is provided with a guide wheel 314 to reduce the friction between the first limiting member 41 and the guide rail 32, which is beneficial to the relationship between the first shed unit 100 and the second shed unit 200 relative sliding. The first limiting member 41 is columnar, and the rotation axis of the guide wheel 314 coincides with the axis of the first limiting member 41 to facilitate the assembly connection between the two. Here, in other embodiments, the first limiting member 41 may be a protrusion, a block, or other structures.

As shown in FIGS. 6 to 8 , the second limiting member 42 is detachably and fixedly connected to both ends of the sliding groove 20 of the second shed unit 200 . The second limiting member 42 includes a base body 421 , a limiting portion 422 and engaging portions 423 a, 423 b. The limiting portion 422 and engaging portions 423 a, 423 b are fixed on the base body 421 . The limiting portion 422 is used to abut against the first limiting member 41 . The second shed unit 200 is provided with clamping grooves 210a, 210b, and the clamping parts 423a, 423b are clamped in the clamping grooves 210a, 210b, so as to realize the detachability between the second limiting member 42 and the second shed unit 200 fixed connection. Here, as another implementation manner, the second limiting member may also be installed on the second shed unit 200 through other detachable fixing methods such as bolts and buckles.

Preferably, there are two clamping parts, and correspondingly there are two clamping grooves, and the clamping grooves and the clamping parts cooperate one-to-one. The structures of the two engaging parts may be the same or different; the structures of the corresponding two engaging grooves 210 may be the same or different. In this embodiment, the structures of the two clamping parts are different. For the convenience of description, the two clamping parts are respectively named as the first clamping part 423a and the second clamping part 423b, and the two clamping grooves are respectively named as the first clamping part. The connecting slot 210a and the second locking slot 210b.

The side of the first engaging portion 423a is provided with a first limiting groove 4230a, and the groove wall of the first engaging groove 210a is provided with a first limiting flange 211a, and the first limiting flange 211a and the first limiting The groove 4230a is plugged and fitted. When the first engaging part 423a is assembled with the first engaging groove 210a, after the first engaging part 423a is inserted into the first engaging groove 210a, the first engaging part 423a moves toward the first engaging groove 210a. The groove wall of the clamping groove 210a moves, and the first limiting flange 211a can be inserted into the first limiting groove 4230a, and the first limiting flange 211a can cooperate with the first limiting groove 4230a to move the first limiting flange 211a to the first limiting groove 4230a. A clamping portion 423a is limited in the first clamping groove 210a to prevent the first clamping portion 423a from coming out of the first clamping groove 210a. In this embodiment, the first locking groove 210a is L-shaped, so as to form the first limiting flange 211a, and is convenient for processing and preparation.

The second engaging portion 423b is provided with two second limiting grooves 4230b, and the two second limiting grooves 4230b are respectively disposed on two opposite side surfaces of the second engaging portion 423b. Two second limiting flanges 211b are disposed on the second clamping groove 210b, and the two second limiting flanges 211b are respectively disposed on two opposite groove walls of the second clamping groove 210b. The second limiting flange 211b and the second limiting groove 4230b are inserted one-to-one. When the second clamping part 423b is assembled with the second clamping groove 210b, after the second clamping part 423b is inserted into the second clamping groove 210b, the second clamping part 423b faces the groove wall of the second clamping groove 210b Move, the second limiting flange 211b can be inserted into the second limiting groove 4230b, and the second locking part 423b can be limited by the cooperation of the second limiting flange 211b and the second limiting groove 4230b In the second locking groove 210b, the second locking portion 423b is prevented from coming out of the second locking groove 210b. In this embodiment, the second engaging groove 210b is T-shaped, so as to form two second limiting flanges 211b, and is convenient for processing and preparation.

Further, a clamping plate 21 is installed on the second shed unit 200, and the first clamping groove 210a and the second clamping groove 210b are both arranged on the clamping plate 21, and the first clamping groove 210a and the second clamping groove 210b can be conveniently connected to each other by using the clamping plate. The processing and preparation of the second clamping groove 210b.

The second limiting member 42 is generally flat, and the first engaging portion, the second engaging portion, and the third engaging portion are arranged along the same direction, so as to facilitate the processing and preparation of the second limiting member 42 . At the same time, the flat base body 421 is used to facilitate the assembly and disassembly operations of the second limiting member 42 .

When assembling and connecting the first shed unit 100 and the second shed unit 200, the guide rail 32 can be inserted into the guide groove 31, and at the same time, the first stopper 41 slides into the sliding groove 20, and the second stopper 42 Installed in the clamping plate 21 at the end of the second shed unit 200, the limiting portion 422 of the second limiting member 42 can close the two ends of the sliding groove 20, thereby limiting the guiding member 314 and the first limiting member 41. In the sliding groove 20 , the first shed unit 100 and the second shed unit 200 can be prevented from being separated from each other.

Further, the telescopic shed 10 may further include a driving vehicle 400 (driving device). The driving cart 400 is installed on the first shed unit 100 located on the outermost layer, and is used to drive at least two shed units to slide relative to each other to realize expansion and contraction. In this embodiment, the telescopic shed 10 can conveniently realize the linkage between multiple shed units by using the limit mechanism, and use one driving car 400 to drive the relative movement of multiple shed units, thereby realizing the telescopic transformation of the telescopic shed 10; At the same time, it can prevent the shed units from being separated from each other.

The driving cart 400 is installed on the outermost first shed unit 100 to facilitate the assembly and connection of the driving cart 400 and the first shed unit 100 , while avoiding interference with the second shed unit 200 and the third shed unit 300 . When the driving cart 400 is moving on the ground, it can drive the first shed unit 100 to move, and after the second shed unit 200 slides out from the first shed unit 100, the space between the first shed unit 100 and the second shed unit 200 is used to The limit mechanism can make the first shed unit 100 and the second shed unit 200 move at the same time, and then make the third shed unit 300 slide out from the second shed unit 200 , using the gap between the second shed unit 200 and the third shed unit 300 The limit mechanism can make the first shed unit 100 and the second shed unit 200 stop sliding, so that the entire telescopic shed 10 can be unfolded, otherwise the entire telescopic shed 10 can be retracted. When the driving cart 400 moves, the third shed unit 300 can be fixed to prevent the third shed unit 300 from moving. Here, in other embodiments, the driving cart 400 may also be installed on the third shed unit 300 located at the innermost layer.

Preferably, rollers 500 are provided on the bottom surface of the shed unit to facilitate the movement of the shed unit. In this embodiment, since the third shed unit 300 needs to be fixed during the expansion and contraction of the telescopic shed 10, the third shed unit 300 does not need to be provided with rollers 500, and the first shed unit 100 and the second shed unit 200 are provided with rollers 500. That's it.

The telescopic shed 10 can also include a door assembly 600, the door assembly 600 is arranged at the end of the shed unit to close the end of the shed unit, so that a relatively closed space is formed in the telescopic shed 10, and the door can be opened at the same time to facilitate personnel in and out. The door assemblies 600 can be divided into two groups, which are respectively arranged at the ends of the two shed units of the telescopic shed 10 away from each other, so as to close both ends of the telescopic shed 10 as a whole.

In this embodiment, the telescopic shed 10 includes three shed units. It can be understood that in other embodiments, the telescopic shed 10 may only include two mutually nested shed units; or, there are four shed units, or More than four.

As shown in FIG. 9 , the telescopic shed 20 provided by the second embodiment of the present invention includes a shed unit and a driving device 240 . There are three or more shed units, including an outer shed unit 201 and at least two inner shed units 202. The at least another inner shed unit 202 is divided into two groups, which are respectively nested in the outer shed unit 201. within both ends. When the same group contains two or more inner shed units 202, the inner shed units 202 in the same group are nested sequentially. In this implementation, specifically, there are three shed units, which include an outer shed unit 201 and two inner shed units 202 , the two inner shed units 202 are divided into two groups, and each group includes an inner shed unit 202 . The two inner shed units 202 are respectively nested at the two ends of the two outer shed units 201 . The two inner shed units 202 are slidingly connected with the outer shed unit 201 respectively. The driving device 240 can be connected to an inner shed unit 202. When the driving device 240 drives an inner shed unit 202 to move, the inner shed unit 202 can first slide from one end of the outer shed unit 201, and then the other inner shed unit 202 Slide out from the other end of the outer shed unit 201, so that the entire telescopic shed 20 is unfolded. The size of the outer shed unit 201 in the sliding direction may be greater than the sum of the corresponding dimensions of the two inner shed units 202 , so that the two inner shed units can be completely nested in the inner shed unit 202 when the telescopic shed 20 is retracted. The structure of the inner shed unit 202 and the outer shed unit 201 as well as the connection methods of the limiting mechanism and the guiding mechanism may be the same as those in the first embodiment, and will not be repeated here.

Here, in other embodiments, one or more shed units can also be nested in the inner shed unit 202, that is, each group contains two or more inner shed units 202 located on the inner side of the same group. The shed units 202 can be nested sequentially so as to be flexible.

The above are the preferred embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered as the present invention. protection scope of the invention.

Claims (10)

1. A telescopic shed, characterized in that it comprises at least two shed units; said at least two shed units are nested, and two adjacent nested shed units are slidably connected; said shed units slide The ends in the direction are arched; A guide mechanism and a limit mechanism are provided between two adjacent shed units; the guide mechanism includes a sliding fit guide groove and a guide rail, and the guide groove and the guide rail are respectively arranged on two adjacent shed units. Above; both ends of the guide groove are open, the guide rail extends into the guide groove, a sliding groove is provided between the guide rail and the connected shed unit, and the two ends of the sliding groove are open; The limiting mechanism includes a first limiting member and a second limiting member, the first limiting member is installed on the groove wall of the guide groove, and is located at one end of the guide groove, the first limiting member The limiter extends into the sliding groove; the second limiter is two, which are respectively detachably fixed at the openings at both ends of the sliding groove. 2. The telescopic shed according to claim 1, wherein the second limiting member comprises a base, a limiting portion and a clamping portion, and both the limiting portion and the clamping portion are fixed on the On the base; the limiting part is used to abut against the first limiting member; the second shed unit is provided with a clamping groove, and the clamping part is clamped in the clamping groove; the clamping A limiting groove is provided on the side of the connecting portion, and a limiting flange is arranged on the groove wall of the clamping groove, and the limiting flange is plugged and matched with the limiting groove. 3. The telescopic shed according to claim 2, wherein there are two limiting grooves, which are respectively arranged on two opposite sides of the clamping part; there are two limiting flanges, They are respectively arranged on two opposite groove walls of the clamping groove. 4. The telescopic shed according to claim 2, characterized in that, the clamping groove is T-shaped or L-shaped. 5 . The telescopic shed according to claim 2 , wherein there are two clamping parts, and the two clamping parts and the limiting part are arranged along the same direction. 5 . 6 . The telescopic shed according to claim 2 , wherein the second limiting member is flat as a whole. 6 . 7. The telescopic shed according to claim 1, wherein a sliding wheel is provided between the guide rail and the guide groove. 8. The telescopic shed according to claim 1, wherein the cross section of the guide rail is L-shaped or arc-shaped. 9. The telescopic shed according to claim 1, wherein the shed unit comprises two arched support frames, a plurality of connecting rods, and a plurality of guard plates, and the two support frames are arranged oppositely, each Both ends of the connecting rod are respectively fixedly connected to the two supporting frames; each of the guard plates is fixed in the middle of the frame formed by the supporting rod and the connecting rod; Both the guiding mechanism and the limiting mechanism are arranged on the connecting rods of two adjacent shed units. 10. The telescopic shed according to claim 1, characterized in that, the telescopic shed further comprises a driving device, the driving device is installed on the outermost or innermost shed unit for driving the The at least two shed units slide relative to each other to realize expansion and contraction.