CN219317519U

CN219317519U - Buffer device for assisting lifting of ceiling and pleasure boat provided with same

Info

Publication number: CN219317519U
Application number: CN202320080655.9U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Qingdao Wujiang Technology Co ltd
Current assignee: Qingdao Wujiang Technology Co ltd
Priority date: 2023-01-12
Filing date: 2023-01-12
Publication date: 2023-07-07
Anticipated expiration: 2033-01-12

Abstract

The utility model relates to a buffer device for assisting in lifting of a ceiling and a pleasure boat provided with the same, wherein the buffer device can be arranged on a lifting cylinder of the ceiling of the pleasure boat and comprises a longitudinal elastic joint and a transverse elastic sleeve head; the longitudinal elastic joint pad is arranged at the joint of the ceiling and the lifting cylinder, wherein the bottom end of the longitudinal elastic joint is propped against the lifting cylinder, and the top end of the longitudinal elastic joint is propped against the ceiling; the longitudinal elastic joint can provide a multidirectional elastic buffer space for the lifting cylinder through elastic deformation; the transverse elastic sleeve head comprises a positioning hoop and a plurality of arc-shaped elastic pieces, wherein sliding beads are arranged at the tops of the arc-shaped elastic pieces, and the arc-shaped elastic pieces are uniformly distributed on the positioning hoop; the positioning hoop is fixed at the top end of the outer cylinder barrel, the bottom end of the arched elastic sheet is fixed on the positioning hoop, and the top of the arched elastic sheet props against the side surface of the inner cylinder barrel to provide transverse pulling elastic force; the inner cylinder barrel can shuttle upwards or downwards along the sliding bead of the arched elastic sheet, so that the lifting cylinder integrally extends or contracts.

Description

Buffer device for assisting lifting of ceiling and pleasure boat provided with same

Technical Field

The utility model relates to the technical field of intelligent ships, in particular to a buffer device for assisting in lifting of a ceiling and a pleasure boat provided with the buffer device.

Background

With the continuous development of artificial intelligence technology, more and more intelligent equipment becomes a research hotspot; the pleasure boat is used as the first choice tool for tourists to play water and is widely applied to rivers, lakes and scenic resorts.

However, most of ceilings of the traditional pleasure boats are fixedly arranged, the heights of the ceilings are difficult to automatically regulate and control, and the user experience is poor; if the ceiling is too high, strong light is easy to shine into the ship cabin in sunny days in summer, rainwater is easy to float into the ship cabin in rainy days, and if the ceiling is too low, the space is not easy to cause oppression, so that the ship is not suitable for tourists to take a ship in cloudy days to see, and the sunlight in winter is prevented from entering.

In the experimental process, even if the supporting rod of the pleasure boat ceiling is replaced by a lifting cylinder capable of automatically stretching, the lifting difficulty still exists, including the following phenomena.

The ship body does periodic rolling and forward and backward swinging motions under the action of external force, namely the action of stormy waves, and the lifting cylinders at different positions are subjected to different bumping moments and impacts, so that the pressure peak born by part of the lifting cylinders exceeds the lifting/lowering power value of the lifting cylinders at high frequency, and the lifting/lowering failure is caused by longitudinal cylinder clamping.

Phenomenon II: if four lifting cylinders are arranged, in an initial state, vertexes of the four lifting cylinders are positioned in a designated horizontal plane and are rigidly connected with a ceiling to form a rectangular three-dimensional member, and stroke errors of the lifting cylinders cause slight asynchronization in the lifting/lowering process, the vertexes of the top surface of the rectangular three-dimensional member are relatively misplaced to cause the lifting cylinders to transversely pull, so that a transverse cylinder clamping phenomenon occurs, and lifting/lowering failure is caused.

Phenomenon III: the lifting cylinder comprises an inner cylinder barrel and an outer cylinder barrel which are embedded, the inner cylinder barrel can shuttle along the outer cylinder barrel, when the length of the inner cylinder barrel wrapped by the outer cylinder barrel is shorter than a specified threshold value, for example, 10% of the inner cylinder barrel is remained, the inner cylinder barrel is easy to slightly bend at the joint, so that the friction resistance of the inner cylinder barrel to the outer cylinder barrel, namely, serious friction clamping cylinder appears when the ceiling slightly shakes, and lifting/lowering fails.

In view of this, overcoming the shortcomings of the prior art products is a problem to be solved in the art.

Disclosure of Invention

The utility model aims to solve the technical problems that: when the height of a ceiling is adjusted, the lifting cylinder of the existing pleasure boat in the market is easy to be blocked, so that the ceiling is failed to lift/descend.

In a first aspect, the utility model provides a buffer device for assisting in lifting of a ceiling, which can be mounted on a lifting cylinder of a pleasure boat ceiling, wherein the buffer device comprises a longitudinal elastic joint, the longitudinal elastic joint is arranged at a joint of the ceiling and the lifting cylinder, the bottom end of the longitudinal elastic joint is propped against the lifting cylinder, and the top end of the longitudinal elastic joint is propped against the ceiling; the longitudinal elastic joint can provide a multidirectional elastic buffer space for the lifting cylinder through elastic deformation.

Further, the longitudinal elastic connector comprises a connecting plate and a sleeve joint, and a plurality of buffer springs are arranged between the connecting plate and the sleeve joint;

the connecting plate is provided with a fastening bolt, a mounting hole and an upper mounting groove, and the fastening bolt penetrates through the mounting hole from bottom to top to fix the connecting plate to the lower end face of the ceiling;

the socket joint comprises a supporting plate and a sleeve, and a lower mounting groove is formed in the supporting plate; the sleeve is wrapped at the top of the lifting cylinder;

one end of the buffer spring is provided with a bolt and is fixed in the upper mounting groove through the bolt, and the other end of the buffer spring is provided with a bolt and is fixed in the lower mounting groove through the bolt;

specifically, an upper fastening hole is formed in the center of the upper mounting groove, a lower fastening hole is formed in the center of the lower mounting groove, connecting hoops are arranged at two ends of the buffer spring, and a connecting hole is formed in the center of the connecting hoops; the bolt passes through the upper fastening hole of the upper mounting groove and the connecting hole of the corresponding connecting hoop at the upper end of the buffer spring, then the buffer spring can be fixed in the upper mounting groove by welding or screwing with a nut, the bolt passes through the lower fastening hole of the lower mounting groove and the connecting hole of the corresponding connecting hoop at the lower end of the buffer spring, and then the buffer spring can be fixed in the lower mounting groove by welding or screwing with a nut.

Further, an inner protecting plug is arranged in the sleeve;

the top of the lifting cylinder is provided with a hollow sleeve;

the sleeve wraps the hollow sleeve of the supporting rod from the outside, the inner protecting plug is inserted into the hollow sleeve and is supported from the inside to prevent the hollow sleeve from deforming;

corresponding connecting pin holes are formed in the sleeve, the hollow sleeve and the inner inserting column, and screws with corresponding sizes can be inserted to coaxially lock the sleeve, the hollow sleeve and the inner inserting column together.

Further, the buffer device also comprises a transverse elastic sleeve head;

the lifting cylinder comprises an outer cylinder barrel and an inner cylinder barrel, and the inner cylinder barrel is arranged in the outer cylinder barrel in a shuttled manner;

the transverse elastic sleeve head comprises a positioning hoop and a plurality of arc-shaped elastic pieces, wherein sliding beads are arranged at the tops of the arc-shaped elastic pieces, and the arc-shaped elastic pieces are uniformly distributed on the positioning hoop;

the positioning hoop is fixed at the top end of the outer cylinder barrel, the bottom end of the arched elastic sheet is fixed on the positioning hoop, and the top of the arched elastic sheet abuts against the side surface of the inner cylinder barrel; the inner cylinder barrel can shuttle upwards or downwards along the sliding bead of the arched elastic sheet, so that the lifting cylinder integrally extends or contracts;

the positioning hoop is provided with a connecting pin hole, and screws with corresponding sizes can be inserted to coaxially lock the positioning hoop and the outer cylinder together;

when asynchronous shaking is generated between the ship body and the ceiling, and the inner cylinder barrel and/or the outer cylinder barrel are/is driven to shake, the ship body provides righting ground pulling back force for the outer cylinder barrel, and the top end of the outer cylinder barrel provides righting ground pulling back force for the bottom end of the inner cylinder barrel; in the process, when the swinging angle of the inner cylinder barrel is larger than that of the outer cylinder barrel, the arched elastic sheet can provide transverse pulling elastic force, so that the rigid transverse pulling between the inner cylinder barrel and the outer cylinder barrel is relieved.

In a second aspect, a pleasure boat is provided, which comprises a boat body and a ceiling, wherein a plurality of lifting cylinders are arranged on the lower end surface of the ceiling, and the longitudinal elastic joint provided in the first aspect is arranged at the joint of the lifting cylinders and the ceiling.

Further, the telescopic joint of the lifting cylinder is provided with the transverse elastic sleeve head proposed by the first aspect;

specifically, the lifting cylinder comprises an outer cylinder barrel and an inner cylinder barrel, and the inner cylinder barrel is arranged in the outer cylinder barrel in a shuttled manner;

the positioning hoop of the transverse elastic sleeve head is fixed at the top end of the outer cylinder barrel, the top of the arched elastic sheet of the transverse elastic sleeve head props against the side surface of the inner cylinder barrel, and transverse pulling elastic force is provided for the inner cylinder barrel through elastic deformation; the inner cylinder barrel can shuttle upwards or downwards along the sliding bead of the arched elastic sheet, so that the lifting cylinder integrally extends or contracts.

In general, the above technical solution conceived by the present utility model has the following advantageous effects compared to the prior art.

1. A longitudinal elastic joint is arranged between the lifting cylinder and the ceiling in a cushioning manner to provide longitudinal buffering, so that rigid longitudinal extrusion between the lifting cylinder and the ceiling is relieved when the ship body jolts up and down, and the phenomenon of longitudinal cylinder clamping caused by overlarge pressure of the lifting cylinder is reduced; the longitudinal elastic joint can provide multidirectional elastic buffer space for the lifting cylinder through elastic deformation, and rigid pulling of the ceiling to each supporting cylinder can be relieved.

2. The transverse elastic sleeve head is sleeved between the ground cylinders of the lifting cylinders to provide transverse buffering, so that the prying deformation phenomenon at the sectional nodes of the lifting cylinders is relieved, and the transverse cylinder clamping phenomenon caused by the swing difference of each lifting cylinder in the lifting process of the ceiling is reduced.

Drawings

In order to more clearly illustrate the embodiments or the technical solutions of the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a top perspective view of the longitudinal elastic joint of example 1 shown in isolation.

Fig. 2 is a bottom perspective view of the longitudinal elastic joint of example 1 shown in isolation.

Fig. 3 is a sectional perspective view of the upper end portion of the vertical elastic joint sleeve of embodiment 1 when it is attached to the lift cylinder.

Fig. 4 is a perspective view showing an explosion pattern when the longitudinal elastic joint and the lift cylinder are shown in isolation in example 1.

Fig. 5 is a top perspective view of the adapter plate of example 1 shown in isolation.

Fig. 6 is a bottom perspective view of the adapter plate of example 1 shown in isolation.

Fig. 7 is a bottom perspective view of the socket of example 1 when displayed in isolation.

Fig. 8 is a top perspective view of the socket of example 1 shown in isolation.

Fig. 9 is a perspective view of the embodiment 2 of the transverse elastic cuff shown in isolation.

Fig. 10 is a perspective view of the lifting cylinder of embodiment 2 with the longitudinal elastic joint and the transverse elastic sleeve mounted thereon at the same time and at the maximum stroke.

Fig. 11 is a perspective view of the lifting cylinder of example 2 with the longitudinal elastic joint and the transverse elastic sleeve mounted thereon at the same time and at the minimum stroke.

Fig. 12 is a perspective view showing the explosion mode of the lift cylinder, the longitudinal elastic joint and the lateral elastic sleeve in example 2 in isolation.

Fig. 13 is a perspective view of the roof of the pleasure boat of example 3 at the maximum stroke height.

Fig. 14 is a perspective view of the roof of the pleasure boat of example 3 at a minimum stroke height.

In the figure: 1-a ceiling; 2-lifting cylinders; 3-a longitudinal elastic joint; 4-transverse elastic sleeve head; 5-connecting pin holes; 6-hull; 201-a hollow sleeve; 202-an outer cylinder; 203-an inner cylinder; 301-a connector plate; 302-a sleeve joint; 303-a buffer spring; 3011-a fastening bolt; 3012-mounting holes; 3013-upper mounting groove; 3014-upper fastening holes; 3021-supporting plates; 3022-a sleeve; 3023-downloading a mounting groove; 3024-lower fastening holes; 3025-inner guard plugs; 3026-a screw; 3031-a bolt; 3032-a connection cuff; 3033-connection holes; 401-locating collar; 402-an arcuate dome; 403-sliding beads.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1: as shown in fig. 1-8, the present embodiment provides a buffer device for assisting lifting of a ceiling, which can be mounted on a lifting cylinder 2 of a pleasure boat ceiling 1, the buffer device comprises a longitudinal elastic joint 3, the longitudinal elastic joint 3 is arranged at a connecting interface of the ceiling 1 and the lifting cylinder 2 in a cushioning manner, wherein the bottom end of the longitudinal elastic joint 3 is propped against the lifting cylinder 2, and the top end of the longitudinal elastic joint 3 is propped against the ceiling 1; the longitudinal elastic joint 3 can provide a multidirectional elastic buffer space for the lifting cylinder 2 through elastic deformation, and the elastic deformation comprises upward elongation, downward compression and circumferential bending.

In this embodiment, the longitudinal elastic connector 3 includes a connection plate 301 and a socket joint 302, and four buffer springs 303 are disposed between the connection plate 301 and the socket joint 302;

the connecting plate 301 is provided with fastening bolts 3011, mounting holes 3012 and upper mounting grooves 3013, and the four mounting holes 3012 correspond to the four fastening bolts 3011; the fastening bolts 3011 pass through the mounting holes 3012 from bottom to top to fix the joint plate 301 to the lower end face of the ceiling 1;

the socket 302 comprises a support plate 3021 and a sleeve 3022, wherein a download mounting groove 3023 is arranged on the support plate 3021; the sleeve 3022 wraps the top of the lifting cylinder 2 from the outer layer, so that the sleeve joint 302 is connected with the lifting cylinder 2;

the buffer spring 303 is provided with a bolt 3031 at one end and is fixed in the upper mounting groove 3013 through the bolt 3031, and is provided with a bolt 3031 at the other end and is fixed in the lower mounting groove 3023 through the bolt 3031;

specifically, an upper fastening hole 3014 is arranged in the center of the upper mounting groove 3013, a lower fastening hole 3024 is arranged in the center of the lower mounting groove 3023, connecting hoops 3032 are arranged at two ends of the buffer spring 303, and a connecting hole 3033 is arranged in the center of the connecting hoops 3032; the bolt 3031 passes through the upper fastening hole 3014 of the upper mounting groove 3013 and the connecting hole 3033 of the corresponding connecting hoop 3032 at the upper end of the buffer spring 303, then the buffer spring 303 can be fixed in the upper mounting groove 3013 by screwing a nut, the bolt 3031 passes through the lower fastening hole 3024 of the lower mounting groove 3023 and the connecting hole 3033 of the corresponding connecting hoop 3032 at the lower end of the buffer spring 303, and then the buffer spring 303 can be fixed in the lower mounting groove 3023 by screwing a nut.

In this embodiment, an inner guard plug 3025 is further disposed inside the sleeve 3022;

the top of the lifting cylinder 2 is provided with a hollow sleeve 201;

the sleeve 3022 wraps the hollow sleeve 201 of the support rod from the outside, the inner guard plug 3025 is inserted into the hollow sleeve 201 and supported from the inside to prevent the hollow sleeve 201 from being deformed, wherein the diameter of the top 5cm of the inner guard plug 3025 is equal to the inner diameter of the hollow sleeve 3022, the hollow sleeve 3022 is conveniently clamped by the top of the inner guard plug 3025, the diameter of the bottom 4.5cm of the inner guard plug 3025 is smaller than the inner diameter of the hollow sleeve 3022, and the bottom of the inner guard plug 3025 is conveniently and rapidly inserted into the hollow sleeve 3022 without obstruction;

the sleeve 3022, the hollow sleeve 201 and the inner plug are provided with four corresponding connecting pin holes 5, and screws 3026 with corresponding sizes can be inserted to coaxially lock the sleeve 3022, the hollow sleeve 201 and the inner plug together.

Example 2: as shown in fig. 9-12, in this embodiment, on the basis of embodiment 1, the buffering device further includes a transverse elastic sleeve head 4, which is 30cm long;

the lifting cylinder 2 comprises an outer cylinder barrel 202 and an inner cylinder barrel 203, wherein the inner cylinder barrel 203 is arranged in the outer cylinder barrel 202 in a shuttled manner, the outer cylinder barrel 202 is 100cm long, and the inner cylinder barrel 203 is 100cm long;

the transverse elastic sleeve head 4 comprises a positioning hoop 401 and six arched shrapnel 402, wherein the length of the positioning hoop 401 is 5cm, and the length of the arched shrapnel 402 is 25cm; a sliding bead 403 with the diameter of 5mm is arranged at the top of the arched elastic sheet 402, so that the friction force of a contact surface can be reduced, wherein six arched elastic sheets 402 are uniformly distributed on the positioning hoop 401;

the positioning hoop 401 is fixed at the top end of the outer cylinder barrel 202, the bottom end of the arched elastic sheet 402 is fixed on the positioning hoop 401, and the top of the arched elastic sheet abuts against the side surface of the inner cylinder barrel 203; the inner cylinder 203 can shuttle upwards or downwards along the sliding bead 403 of the arched elastic sheet 402, so as to realize the integral extension or contraction of the lifting cylinder 2;

the positioning hoop 401 is provided with a connecting pin hole 5, and a screw 3026 with corresponding size can be inserted to coaxially lock the positioning hoop 401 and the outer cylinder barrel 202 together;

when asynchronous shaking is generated between the hull 6 and the ceiling 1, and the inner cylinder 203 and/or the outer cylinder 202 are driven to shake, the hull 6 provides righting ground returning force for the outer cylinder 202, and the top end of the outer cylinder 202 provides righting ground returning force for the bottom end of the inner cylinder 203; in this process, when the swing angle of the inner cylinder 203 is greater than that of the outer cylinder 202, the arcuate spring 402 provides a lateral pull back force, relieving the rigid lateral pull between the inner cylinder 203 and the outer cylinder 202.

Example 3: as shown in fig. 13 and 14, on the basis of embodiment 1 and embodiment 2, the present embodiment further provides a pleasure boat, which includes a hull 6 and a ceiling 1, wherein a plurality of lifting cylinders 2 are disposed on the lower end surface of the ceiling 1, the lifting cylinders 2 are uniformly distributed, the weight of the ceiling 1 is spread, and the longitudinal elastic joint 3 set forth in embodiment 1 is disposed at the joint between the lifting cylinders 2 and the ceiling 1.

In this embodiment, the telescopic joint of the lifting cylinder 2 is provided with the transverse elastic sleeve head 4;

specifically, the lifting cylinder 2 includes an outer cylinder 202 and an inner cylinder 203, and the inner cylinder 203 is disposed in the outer cylinder 202 in a shuttled manner;

the positioning hoop 401 of the transverse elastic sleeve head 4 is fixed at the top end of the outer cylinder barrel 202, the top of the arched elastic sheet 402 of the transverse elastic sleeve head 4 props against the side surface of the inner cylinder barrel 203, and provides transverse pulling elastic force for the inner cylinder barrel 203 through elastic deformation; the inner cylinder 203 can shuttle up or down along the sliding bead 403 of the arcuate spring 402, thereby realizing the overall extension or retraction of the lift cylinder 2.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The buffer device for assisting in lifting of the ceiling is capable of being mounted on a lifting cylinder (2) of a pleasure boat ceiling (1), and is characterized by comprising a longitudinal elastic connector (3), wherein the longitudinal elastic connector (3) is arranged at a joint of the ceiling (1) and the lifting cylinder (2) in a cushioning manner, the bottom end of the longitudinal elastic connector (3) is propped against the lifting cylinder (2), and the top end of the longitudinal elastic connector (3) is propped against the ceiling (1); the longitudinal elastic joint (3) can provide a multidirectional elastic buffer space for the lifting cylinder (2) through elastic deformation.

2. The auxiliary ceiling lifting buffer device according to claim 1, wherein the longitudinal elastic joint (3) comprises a joint plate (301) and a socket joint (302), and a plurality of buffer springs (303) are arranged between the joint plate (301) and the socket joint (302);

the connecting plate (301) is provided with a fastening bolt (3011), a mounting hole (3012) and an upper mounting groove (3013), and the fastening bolt (3011) penetrates through the mounting hole (3012) from bottom to top to fix the connecting plate (301) to the lower end face of the ceiling (1);

the socket head (302) comprises a supporting plate (3021) and a sleeve (3022), wherein a lower mounting groove (3023) is formed in the supporting plate (3021); the sleeve (3022) is wrapped on the top of the lifting cylinder (2);

one end of the buffer spring (303) is provided with a bolt (3031) and is fixed in the upper mounting groove (3013) through the bolt (3031), and the other end of the buffer spring is provided with the bolt (3031) and is fixed in the lower mounting groove (3023) through the bolt (3031);

specifically, an upper fastening hole (3014) is formed in the center of the upper mounting groove (3013), a lower fastening hole (3024) is formed in the center of the lower mounting groove (3023), connecting hoops (3032) are arranged at two ends of the buffer spring (303), and a connecting hole (3033) is formed in the center of the connecting hoops (3032).

3. The auxiliary ceiling lifting buffer device according to claim 2, wherein an inner guard plug (3025) is further provided inside the sleeve (3022);

the top of the lifting cylinder (2) is provided with a hollow sleeve (201);

the sleeve (3022) is used for wrapping the hollow sleeve (201) of the supporting rod from outside, and the inner protecting plug (3025) is inserted into the hollow sleeve (201);

corresponding connecting pin holes (5) are formed in the sleeve (3022), the hollow sleeve (201) and the inner plug, and screws (3026) with corresponding sizes can be inserted to coaxially lock the sleeve (3022), the hollow sleeve (201) and the inner plug together.

4. A roof lifting-assisted cushioning device according to any one of claims 1-3, characterized in that the cushioning device further comprises a transverse elastic cuff (4);

the lifting cylinder (2) comprises an outer cylinder barrel (202) and an inner cylinder barrel (203), and the inner cylinder barrel (203) is arranged in the outer cylinder barrel (202) in a shuttled manner;

the transverse elastic sleeve head (4) comprises a positioning hoop (401) and a plurality of arched elastic pieces (402), sliding beads (403) are arranged at the tops of the arched elastic pieces (402), and the plurality of arched elastic pieces (402) are uniformly distributed on the positioning hoop (401);

the positioning hoop (401) is fixed at the top end of the outer cylinder barrel (202), the bottom end of the arched elastic sheet (402) is fixed on the positioning hoop (401), the top is propped against the side surface of the inner cylinder barrel (203), and transverse pulling elastic force is provided for the inner cylinder barrel (203) through elastic deformation.

5. The pleasure boat is characterized by comprising a boat body (6) and a ceiling (1), wherein a plurality of lifting cylinders (2) are arranged on the lower end face of the ceiling (1), and a longitudinal elastic joint (3) in the buffer device according to any one of claims 1-3 is arranged at a connecting interface of the lifting cylinders (2) and the ceiling (1).

6. Pleasure boat according to claim 5, characterized in that the telescopic joint of the lifting cylinder (2) is provided with a transverse elastic sleeve (4);

specifically, the lifting cylinder (2) comprises an outer cylinder barrel (202) and an inner cylinder barrel (203), and the inner cylinder barrel (203) is arranged in the outer cylinder barrel (202) in a shuttled manner;

the positioning hoop (401) of the transverse elastic sleeve head (4) is fixed at the top end of the outer cylinder barrel (202), and the top of the arched elastic sheet (402) of the transverse elastic sleeve head (4) is propped against the side surface of the inner cylinder barrel (203); the inner cylinder (203) can shuttle upwards or downwards along the sliding bead (403) of the arched spring plate (402), so that the lifting cylinder (2) can be integrally extended or contracted.