Logistics transportation amusement equipment

By designing a logistics transportation amusement equipment, and utilizing lifting and striking mechanisms to transport and strike toys, the problem of the lack of collaborative ability in existing amusement equipment is solved, which cultivates children's cooperative ability and improves the safety and fun of the equipment.

CN223846226UActive Publication Date: 2026-01-30SHANGHAI SOONG CHING LING EARLY CHILDHOOD RES CENT
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202423196674.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2026-01-30
Estimated Expiration
2034-12-23

AI Technical Summary

Technical Problem

Existing amusement equipment lacks the function of cultivating children's cooperation or collaboration skills. Most of them are for individual play and cannot realize the collaborative play of multiple children.

Method used

Design a logistics transportation amusement equipment, including a protective box, a lifting mechanism, a power mechanism, and a striking mechanism. The lifting mechanism transports the toy to a certain height, and the striking mechanism knocks the toy to a designated area, allowing multiple children to participate in the game together.

Benefits of technology

By using unique striking methods to pique players' interest, the device cultivates children's teamwork skills while improving safety and fun, achieving edutainment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223846226U_ABST
    Figure CN223846226U_ABST
Patent Text Reader

Abstract

The utility model discloses logistics transportation amusement equipment which smoothly conveys toys to a certain height through a lifting mechanism and then strikes the toys to a designated area through a striking mechanism. The logistics transportation amusement equipment comprises a protection box, a lifting mechanism, a power mechanism and a striking mechanism. Two lifting frames of the lifting mechanism are telescopically arranged between the base and the platform in parallel and used for driving the platform to ascend and descend. A rocker of the power mechanism is connected to the two hydraulic cylinders and used for being pressed down by a player to enable piston rods of the hydraulic cylinders to extend, and therefore the lifting frame is driven to ascend and stretch. The pressure relief pedal is connected to the two hydraulic cylinders and used for being treaded by a player, so that the piston rod retracts, and the lifting frame is driven to descend and be folded. The hitting mechanism comprises a fixing structure and a hitting rod, the hitting rod is rotatably installed on the fixing structure, and a player rotates the hitting rod to hit the toy on the platform to a designated area.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of amusement equipment technical field, in particular to a kind of logistics transport amusement equipment with lifting function and hitting function. BACKGROUND

[0002] At present, more and more diversified amusement equipment in the market, which makes full use of mechanical, electrical, light, sound, water, force and other advanced technology, and set knowledge, interesting, scientific, thrilling in one, deeply popular among the majority of young people, children. But the usual amusement equipment is mostly a child to play, or multiple children play their own, and almost can not cultivate the cooperation or collaborative ability between children.

[0003] Therefore, it is necessary to develop an intelligence type amusement equipment for multiple children to play together and complete logistics transportation. CONTENT OF UTILITY MODEL

[0004] The main purpose of the utility model is to provide a kind of logistics transport amusement equipment, which can transport toys to a certain height, and then hit the toys into the designated area by hitting, with ingenious design concept, which can arouse the curiosity and desire to know of players, and also can involve multiple players, so as to cultivate the cooperation ability of players and realize the combination of teaching and entertainment.

[0005] Other purposes and advantages of the utility model can be further understood from the technical features disclosed in the utility model.

[0006] The utility model discloses a logistics transportation amusement equipment which comprises a protection box, a lifting mechanism, a power mechanism and a hitting mechanism.

[0007] In one embodiment, at least one side wall of the protection box is a transparent wall.

[0008] In one embodiment, the operation arm is parallel to the platform.

[0009] In one embodiment, the hitting rod is installed on the fixed structure through a plurality of support structures; each support structure comprises a vertical sheet and a horizontal sheet; the vertical sheet is provided with a mounting hole, and the support structure is fixed to the fixed structure through a screw passing through the mounting hole; the horizontal sheet is perpendicularly connected to the vertical sheet, and the horizontal sheet is provided with a through hole, and the vertical arm of the hitting rod can rotatably pass through the through hole.

[0010] In one embodiment, each lifting frame comprises a plurality of lifting rods, and adjacent lifting rods are rotatably connected together and constitute a shear type.

[0011] In one embodiment, the lifting frame further comprises an upper pivot end connected to the platform, an upper sliding end sliding along the platform, a lower pivot end connected to the base, and a lower sliding end sliding along the base.

[0012] In one embodiment, the upper pivot end and the upper sliding end are located on two of the lifting rods adjacent to the platform in a scissors configuration, and the lower pivot end and the lower sliding end are located on two of the lifting rods adjacent to the base in a scissors configuration.

[0013] In one embodiment, the base has an upper support surface, and the platform has a lower support surface. The upper support surface and the lower support surface are oppositely arranged, and the lifting frame is located between the upper support surface and the lower support surface. The upper sliding end is a pulley for sliding along the lower support surface of the platform. The lower sliding end is a pulley for sliding along the upper support surface of the base.

[0014] In one embodiment, both ends of the first connecting rod and the second connecting rod are connected to the two lifting frames respectively; the second connecting rod is arranged above the first connecting rod; and the first connecting rod horizontally connects the lower sliding ends of the two lifting frames.

[0015] In one embodiment, the fixed cylinder is fixed on the first connecting rod, and the piston rod is pivotally connected to the second connecting rod. In the second connecting rod, two pairs of clamping plates are arranged, a rotating shaft is arranged between each pair of clamping plates, and the piston rod is connected to the rotating shaft, so that the piston rod can rotate relative to the second connecting rod; when the piston rod is extended or retracted, the piston rod pushes the second connecting rod to rise or fall.

[0016] Compared with the prior art, the logistics transportation amusement device of the utility model improves the safety of the whole device by arranging a protection box to accommodate part of the lifting mechanism and part of the power mechanism; and the lifting mechanism and the power mechanism can smoothly transport the toys to a certain height, and then hit the toys to the specified area through the hitting mechanism. The design concept of the logistics transportation amusement device of the utility model is ingenious, the toys can be transported to the specified area through the unique hitting mode, the interest of the players is successfully aroused, and the team cooperation ability of the players can be cultivated by playing together. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the logistics transportation amusement device of one embodiment of the utility model, which mainly shows the positional relationship of each mechanism;

[0018] Figure 2 Structure diagram of the lifting mechanism of one of the embodiments of the present application;

[0019] Figure 3 Front connection relationship diagram of the lifting mechanism and the power mechanism in the logistics transportation amusement equipment of one of the embodiments of the present application;

[0020] Figure 4 Side connection relationship diagram of the lifting mechanism and the power mechanism in the logistics transportation amusement equipment of one of the embodiments of the present application, which shows the state after the lifting frame is unfolded and the platform is raised.

[0021] Figure 5 Side connection relationship diagram of the lifting mechanism and the power mechanism in the logistics transportation amusement equipment of one of the embodiments of the present application, which shows the state after the lifting frame is folded and the platform is lowered.

[0022] Figure 6 Schematic diagram of the support structure of one of the embodiments of the present application.

[0023] The reference signs in the above drawings are explained as follows:

[0024] Logistics transportation amusement equipment 1

[0025] Side wall 11 Protection space 12

[0026] Opening 13 Transparent wall 14

[0027] Lifting mechanism 20 Base 21

[0028] Upper support surface 210 Platform 22

[0029] Lower support surface 220 Lifting frame 23

[0030] Lifting rod 230 Pivot shaft 2301

[0031] Connecting rod 2302 Upper pivot end 231

[0032] Upper sliding end 232 Lower pivot end 233

[0033] Lower sliding end 234 Pulley 235, 236

[0034] First connecting rod 24 Second connecting rod 25

[0035] Clamp plate 250 Pivot shaft 251

[0036] Power mechanism 30 Hydraulic cylinder 31

[0037] Fixed cylinder 310 Piston rod 311

[0038] Rocker 32 Foot pedal 33

[0039] Strike mechanism 40 Fixed structure 41

[0040] Strike lever 42 Vertical arm 420

[0041] Strike arm 421 Operating arm 422

[0042] Support structure 43 Vertical piece 430

[0043] Mounting hole 4301 Horizontal piece 431

[0044] Through hole 4311. DETAILED DESCRIPTION

[0045] The following description of the embodiments is made with reference to the accompanying drawings, which illustrate specific embodiments in which the present application can be practiced. Directional terms as used in the present application, such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", etc., are made with reference to the drawings. Therefore, the directional terms are used for illustrating and understanding the present application, not for limiting the present application.

[0046] The logistics transportation amusement device can make multiple players (such as children) play together and cooperate to complete the game task of toy transportation. For example, first, the first player is responsible for placing the toy on the platform; then, the second player is responsible for constantly pressing the handle to force the platform to rise, thereby transporting the toy to a certain height; finally, the third player is responsible for rotating the strike lever to hit the toy to the designated area. The logistics transportation amusement device has a clever design concept, which can involve multiple players and cultivate the cooperation ability of the players. The setting of the protective box not only improves the safety of the device, but also arouses the curiosity and desire for knowledge of the players about the device because it can show the operation principle of the device, realizing the combination of teaching and entertainment.

[0047] Please refer to Figure 1 Fig. 1, in one embodiment, the logistics transportation amusement device 1 includes a protective box 10, a lifting mechanism 20, a power mechanism 30, and a strike mechanism 40.

[0048] The protective box 10 includes multiple side walls 11, a protective space 12 surrounded by the side walls 11, and an upward opening 13.

[0049] The lifting mechanism 20 comprises a base 21, a platform 22 and two lifting frames 23, wherein the base 21 is located at the bottom of the protective box 10; the platform 22 is exposed outside from the opening 13; the two lifting frames 23 are telescopically arranged in parallel between the base 21 and the platform 22, and are used to drive the platform 22 to rise and fall. Two parallel first connecting rods 24 and second connecting rods 25 are arranged between the two lifting frames 23, and are used to fix the power mechanism 30.

[0050] The power mechanism 30 comprises two hydraulic cylinders 31, a rocker 32 and a relief pedal 33. The two hydraulic cylinders 31 are arranged in parallel and symmetrically on the two lifting frames 23, and each hydraulic cylinder 31 comprises a fixed cylinder 310 and a piston rod 311, wherein the piston rod 311 is telescopically connected to the fixed cylinder 310. The fixed cylinder 310 is installed to the first connecting rod 24, and the piston rod 311 is installed to the second connecting rod 25. The rocker 32 is connected to the two hydraulic cylinders 31, and the rocker 32 is located outside the protective box 10 and is operated by the player. By continuously depressing the rocker 32, the piston rod 311 is elongated to push the second connecting rod 25 to move upward, and further push the lifting frame 23 to rise and expand, so that the platform 22 is raised. The relief pedal 33 is connected to the two hydraulic cylinders 31, and the relief pedal 33 is located outside the protective box 10. By stepping on the relief pedal 33, the piston rod 311 is retracted to drive the lifting frame 23 to fall and fold, so that the platform 22 is lowered.

[0051] The hitting mechanism 40 comprises a fixed structure 41 and a hitting rod 42. The fixed structure 41 is arranged on one side of the protective box 10, and the hitting rod 42 is rotatably installed to the fixed structure 41. The hitting rod 42 comprises a vertical arm 420, a hitting arm 421 and an operating arm 422, wherein the hitting arm 421 is connected to the top end of the vertical arm 420 and is perpendicular to the vertical arm 420, and the hitting arm 421 is located above the platform 22; the operating arm 422 is connected to the bottom end of the vertical arm 420, and is used to be operated by the player to rotate the hitting rod 42. The rotating operating arm 422 can hit the toy on the platform 22 to the designated area.

[0052] The logistics transportation amusement equipment 1 of one embodiment of the utility model can improve the safety of the whole equipment by arranging the protective box 10 to accommodate part of the lifting mechanism 20 and part of the power mechanism 30. The utility model can successfully transport the toy to a certain height through the arrangement of the lifting mechanism 20 and the power mechanism 30, and then hit the toy to the designated area through the hitting mechanism 40. The design concept of the logistics transportation amusement equipment 1 of the utility model is ingenious, which can transport the toy to the designated area through the unique hitting mode, successfully arouse the interest of the player, and cultivate the team cooperation ability of the players by letting multiple players play together.

[0053] Please refer to Figure 1As shown, at least one side wall 11 of the protection box 10 is a transparent wall 14, which is used for players to observe the situation inside the protection box 10, arouse the curiosity and desire of players to know the principle of the device operation, and realize the combination of entertainment and education. In one embodiment, the bottom of the protection box 10 can be directly used as the base 21 of the lifting mechanism 20; and in other embodiments, the bottom of the protection box 10 and the base 21 of the lifting mechanism 20 can be two different components, and the lifting mechanism 20 is stably arranged in the protection box 10 by fixing the base 21 of the lifting mechanism 20 on the bottom of the protection box 10.

[0054] Please refer to Figure 2 The structural diagram of the lifting mechanism 20 of one embodiment of the utility model is shown. The two lifting frames 23 can be opened and folded to realize the telescopic function, thereby driving the platform 22 to rise and fall. In one embodiment, each lifting frame 23 includes a plurality of lifting rods 230, and adjacent lifting rods 230 are connected to each other in a pivotable manner and form a shear type, thereby providing the lifting frame 23 with the telescopic function. Figure 2 In the figure, only the positional relationship between the lifting rods 230 is schematically drawn, and the pivot connection structure thereof is not drawn in detail. For example, adjacent lifting rods 230 can be connected through a pivot shaft 2301 (see Figure 4 ), thereby forming a shear type and being able to complete the lifting function. In addition, the connecting rods between the two lifting frames 23 are not drawn in Figure 2 In fact, a plurality of parallel connecting rods 2302 (see Figure 3 ) can be arranged between the two lifting frames 23 in the specific implementation, and the connecting rods 2302 horizontally connect the lifting rods 230, especially the pivot shafts 2301 at the same horizontal height of the two lifting frames 23 (of course, they can also be connected at positions other than the pivot shafts), so as to further make the rising or falling process of the lifting frame 23 more stable. For example, the first connecting rod 24 and the second connecting rod 25 both belong to the connecting rods 2302.

[0055] As shown in Figure 2 , each lifting frame 23 further includes an upper pivot end portion 231 connected to the platform 22, an upper sliding end portion 232 sliding along the platform 22, a lower pivot end portion 233 connected to the base 21, and a lower sliding end portion 234 sliding along the base 21. Among them, the upper pivot end portion 231 and the upper sliding end portion 232 are respectively located on two adjacent lifting rods 230 (which can be called upper lifting rods 230a) constituting a shear type adjacent to the platform 22, and the lower pivot end portion 233 and the lower sliding end portion 234 are respectively located on two adjacent lifting rods 230 (which can be called lower lifting rods 230b) constituting a shear type adjacent to the base 21.

[0056] Please refer to Figure 2 and Figure 4As shown, the base 21 has an upper support surface 210 (i.e., the upper surface of the base), and the platform 22 has a lower support surface 220 (i.e., the lower surface of the platform). The upper support surface 210 and the lower support surface 220 are arranged opposite to each other, and the lifting frame 23 is located between the upper support surface 210 and the lower support surface 220. In one embodiment, the upper sliding end 232 can be a pulley 235 (see...). Figure 4 It can slide directly along the lower support surface 220 of the platform 22; the lower sliding end 234 can also be a pulley 236 (see...). Figure 4 It can slide directly along the upper support surface 210 of the base 21.

[0057] In other embodiments, the upper support surface 210 may be provided with an upper slide rail (not shown), and the lower support surface 220 may be provided with a lower slide rail (not shown). Therefore, the upper sliding end 232 and the lower sliding end 234 can slide left and right along the upper slide rail and the lower slide rail respectively, so that the lifting frame 23 can be opened or folded safely in a more stable posture.

[0058] In one embodiment, the base 21 may be a simple flat plate, or simply two parallel slide rails, or a flat plate with slide rails.

[0059] Please refer to the following at the same time Figure 3 , Figure 4 , Figure 5 As shown, the two ends of the first connecting rod 24 and the second connecting rod 25 are respectively connected to the two lifting frames 23. When the two lifting frames 23 open (see...), Figure 4 ) or fold (see Figure 5 When the first connecting rod 24 and the second connecting rod 25 move with the lifting frame 23, or when one of the connecting rods (e.g., the second connecting rod 25) is pushed up or down by the piston rod 311 of the hydraulic cylinder 31, the two lifting frames 23 can be forced to open or fold. Specifically, in one embodiment, the first connecting rod 24 can be located at the lowest position of the lifting frame 23, for example, the first connecting rod 24 can be horizontally connected to the lower sliding end 234 of the two lifting frames 23 (see...). Figure 4 When the first connecting rod 24 moves left and right, the lower sliding ends 234 of the two lifting frames 23 will slide left and right along the upper support surface 210 of the base 21. The second connecting rod 25 is positioned above the first connecting rod 24. It should be noted that the so-called "above" position includes directly above and diagonally above. In this embodiment, the second connecting rod 25 is positioned diagonally above the first connecting rod 24. When the second connecting rod 25 is forced to rise and fall under the push of the power mechanism 30, it will drive the entire lifting frame 23 to deform (i.e., open or fold).

[0060] The present application does not limit the specific position of the first connecting rod 24 and the second connecting rod 25 on the lifting frame 23, for example, the first connecting rod 24 can be arranged at the middle position of the two lifting frames 23 or slightly close to the lower position, rather than the lowermost position of the lifting frame 23. However, it is necessary to ensure that the second connecting rod 25 is arranged at the upper position of the first connecting rod 24.

[0061] Please refer to Figure 3 , Figure 4 The power mechanism 30 is shown in the drawings, in one embodiment, two hydraulic cylinders 31 are arranged in parallel and symmetrically on the lifting frame 23, so as to provide smooth driving force and support force for the entire logistics transportation amusement device 1. In one embodiment, the fixed cylinder 310 can be installed on the first connecting rod 24 by screw locking or directly welded on the first connecting rod 24. The piston rod 311 is pivoted to the second connecting rod 25. In detail, two pairs of clamping plates 250 are arranged on the second connecting rod 25, as shown in Figure 3 , a rotating shaft 251 is arranged in the middle of each pair of clamping plates 250, and the top or top near position of the piston rod 311 is connected to the rotating shaft 251, so that the piston rod 311 can rotate relative to the second connecting rod 25, so that when the piston rod 311 is extended or retracted, the second connecting rod 25 can be smoothly pushed up (see Figure 4 ) or down (see Figure 5 ). In this embodiment, the power mechanism 30 is actually a hydraulic jack, and the connecting pipeline between the rocker 32 and the relief foot 33 and the hydraulic cylinder 31 is not drawn in the figure, which can be arranged according to the principle of hydraulic jack. It should be reminded that the position relationship between the structure of the power mechanism 30, the first connecting rod 24, the second connecting rod 25, the clamping plate 250, the rotating shaft 251 and other mechanisms or components is only shown in the drawings to illustrate the cooperation principle or working principle between them, and the specific size design can be determined according to actual needs.

[0062] In addition, as shown in Figure 1 , the rocker 32 and the relief foot 33 are located on the same side of the protection box 10, and the rocker 32 is arranged above the relief foot 33.

[0063] Please refer to Figure 1 The hitting mechanism 40 is shown, the fixed structure 41 can be a fixed column, which can be directly installed on the side wall of the protection box, or independently located on one side of the protection box, or located on other equipment. The hitting rod 42 is installed on the fixed structure 41 through a plurality of supporting structures 43. As Figure 6As shown, the support structure 43 can be a support ear which protrudes outward from the fixed column, and the hitting rod 42 is rotatably connected to the support ear to further limit the hitting rod 42. Each support structure 43 comprises a vertical piece 430 and a horizontal piece 431, the vertical piece 430 is provided with a mounting hole 4301, and a screw is passed through the mounting hole 4301 to rotatably fix the support structure 43 to the fixed structure 41. The horizontal piece 431 is perpendicularly connected to the vertical piece 430, and the horizontal piece 431 is provided with a through hole 4311, the vertical arm 420 of the hitting rod 42 is rotatably passed through the through hole 4311, so that the hitting rod 42 is rotatably connected to the support structure 43, and thus the hitting rod 42 is rotatably mounted on the fixed structure 41. In addition, in an embodiment, the operating arm 422 is parallel to the platform 22.

[0064] In summary, the logistics transportation amusement device 1 can smoothly transport the toy to a certain height, and then hit the toy into the designated area by hitting, the design concept is ingenious, can arouse the curiosity and desire to know of the players to the device, and multiple players can participate at the same time, so as to cultivate the cooperation ability of the players, and realize the combination of teaching and entertainment.

Claims

1. A logistics transportation amusement apparatus, characterized in that, The protection box, the lifting mechanism, the power mechanism and the hitting mechanism are included. The protection box includes multiple side walls, a protection space surrounded by the side walls, and an upward opening. The lifting mechanism includes a base, a platform and two lifting frames; the base is located at the bottom of the protection box; the platform is exposed outside from the opening; the two lifting frames are arranged in parallel and extendably between the base and the platform to drive the platform to rise and fall; two parallel first connecting rods and second connecting rods are arranged between the two lifting frames to fix the power mechanism; The power mechanism includes two hydraulic cylinders, a rocker and a pressure relief pedal; the two hydraulic cylinders are arranged in parallel and symmetrically on the two lifting frames; each hydraulic cylinder includes a fixed cylinder and a piston rod which is extendably connected to the fixed cylinder; the fixed cylinder is mounted to the first connecting rod and the piston rod is mounted to the second connecting rod; the rocker is connected to the two hydraulic cylinders and located outside the protection box to be pressed by the player to make the piston rod extend, push the second connecting rod to move upward and drive the lifting frame to open; the pressure relief pedal is connected to the two hydraulic cylinders and located outside the protection box to be stepped by the player to make the piston rod retract and drive the lifting frame to fold; The hitting mechanism includes a fixed structure and a hitting rod which is rotatably mounted to the fixed structure; the hitting rod includes a vertical arm, a hitting arm and an operating arm; the hitting arm is connected to the top end of the vertical arm and perpendicular to the vertical arm, and the hitting arm is located above the platform; the operating arm is connected to the bottom end of the vertical arm to be operated by the player to rotate the hitting rod and hit the toy on the platform to the designated area.

2. The logistics transportation amusement apparatus of claim 1, wherein: At least one side wall of the protection box is a transparent wall.

3. The logistics transportation amusement apparatus of claim 1, wherein: The operating arm is parallel to the platform.

4. The logistics transportation amusement apparatus of claim 1, wherein: The hitting rod is mounted to the fixed structure through multiple support structures; Each support structure includes a vertical piece and a horizontal piece; the vertical piece is provided with a mounting hole through which a screw is passed to fix the support structure to the fixed structure; the horizontal piece is connected perpendicularly to the vertical piece and provided with a through hole through which the vertical arm of the hitting rod is rotatably passed.

5. The logistics transportation amusement apparatus of claim 1, wherein: Each lifting frame includes multiple lifting rods; adjacent lifting rods are rotatably connected together and form a shear type in pairs.

6. The logistics transportation amusement apparatus of claim 5, wherein: The lifting frame further includes an upper pivot end connected to the platform, an upper sliding end sliding along the platform, a lower pivot end connected to the base and a lower sliding end sliding along the base.

7. The logistics transportation amusement apparatus of claim 6, wherein: The upper pivot end and the upper sliding end are located on two adjacent lifting rods forming a shear type on the platform respectively, and the lower pivot end and the lower sliding end are located on two adjacent lifting rods forming a shear type on the base respectively.

8. The logistics transportation amusement apparatus of claim 7, wherein: The base has an upper support surface and the platform has a lower support surface. The upper support surface and the lower support surface are oppositely arranged, and the lifting frames are located between the upper support surface and the lower support surface; The upper sliding end is a pulley for sliding along the lower support surface of the platform; The lower sliding end is a pulley for sliding along the upper support surface of the base.

9. The logistics transportation amusement apparatus of claim 7, wherein: The two ends of the first connecting rod and the second connecting rod are respectively connected to the two lifting frames; The second connecting rod is arranged above the first connecting rod; The first connecting rod horizontally connects the lower sliding ends of the two lifting frames.

10. The logistics transportation amusement apparatus of claim 1, wherein: The fixed cylinder is fixed on the first connecting rod, and the piston rod is pivotally connected to the second connecting rod; Two pairs of clamping plates are arranged on the second connecting rod, a rotating shaft is arranged between each pair of clamping plates, the piston rod is connected to the rotating shaft, so that the piston rod can rotate relative to the second connecting rod; when the piston rod is extended or retracted, the piston rod pushes the second connecting rod to rise or fall.