A handling device

Abstract

The application discloses a carrying device which can be applied to the carrying of heavy objects in low space and narrow space. The carrying device comprises a connecting frame and a plurality of jacking mechanisms, the plurality of jacking mechanisms are arranged on the connecting frame, one of the plurality of jacking mechanisms comprises a piston lifting assembly and a roller assembly, the piston lifting assembly is installed on the connecting frame, the piston lifting assembly can be telescopic in a first direction, and the telescopic end of the piston lifting assembly is connected with the connecting frame. In the application, the height of the jacking mechanism is less than 30 mm when the piston lifting assembly is in a retracted state.

Description

Technical Field

[0001] This application relates to the field of material handling technology, and more particularly to a handling device. Background Technology

[0002] In material handling, handling devices are needed to improve efficiency and capacity. However, for large appliances such as refrigerators and washing machines, the limited space at the bottom makes it difficult for traditional handling tools to reach them. Furthermore, these appliances are often embedded in custom installation spaces (such as cabinets or walls), further reducing the available space. Therefore, these appliances are currently often handled manually. Thus, there is an urgent need for a new handling device suitable for moving heavy objects in low-ceilinged and narrow spaces. Utility Model Content

[0003] This application provides a handling device suitable for handling heavy objects in low-ceilinged and narrow spaces.

[0004] This application provides a handling device, including a connecting frame and multiple lifting mechanisms. The multiple lifting mechanisms are disposed on the connecting frame. One of the lifting mechanisms includes a piston lifting assembly and a roller assembly. The piston lifting assembly is mounted on the connecting frame and can extend and retract in a first direction. The extension and retraction end of the piston lifting assembly is connected to the roller assembly. In the retracted state, the height of the lifting mechanism is less than 30mm.

[0005] In the technical solution of this application embodiment, the lifting mechanism is used to carry the target object to be transported, while the connecting frame is used to connect multiple lifting mechanisms. The lifting mechanism is telescopic. The roller assembly in the lifting mechanism contacts the ground, facilitating the movement of the entire transport device and the target object carried on the transport device. When transport is required, the piston lifting assembly is first in a retracted state, the transport device is extended under the target object to be transported, and then the piston lifting assembly is driven to lift, causing the piston lifting assembly to rise, thereby driving the roller assembly to move in a first direction, thus increasing the distance between the roller assembly and the connecting frame, allowing the transport device to lift the target object to be transported, lifting the entire target object off the ground. Through the rolling of the roller assembly with the ground, transport and displacement can be easily carried out. Moreover, when the piston lifting assembly is in the retracted state, the height of the lifting mechanism is less than 30mm. Therefore, the transport device provided by this application is suitable for transporting heavy objects with low and narrow bottom spaces. Attached Figure Description

[0006] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0007] Figure 1 A schematic diagram of the first pose of the first embodiment of the conveying device provided in this application;

[0008] Figure 2 A bottom view structural schematic diagram of a first embodiment of the conveying device provided in this application;

[0009] Figure 3 This is a schematic diagram of the lifting mechanism of the conveying device provided in the embodiments of this application;

[0010] Figure 4 An exploded view of the lifting mechanism of the conveying device provided in the embodiments of this application;

[0011] Figure 5 A cross-sectional schematic diagram of the lifting mechanism of the conveying device provided in the embodiments of this application in a first state;

[0012] Figure 6 A cross-sectional schematic diagram of the lifting mechanism of the conveying device provided in the embodiments of this application in a second state;

[0013] Figure 7 A schematic diagram of the structure of the first piston member of the lifting mechanism of the conveying device provided in the embodiments of this application;

[0014] Figure 8 A schematic diagram of the structure of the second piston component of the lifting mechanism of the conveying device provided in the embodiments of this application;

[0015] Figure 9 A schematic diagram of the second pose structure of a first embodiment of the conveying device provided in this application;

[0016] Figure 10 A partial structural schematic diagram of a first embodiment of the conveying device provided in this application;

[0017] Figure 11 A schematic diagram of the first pose structure of a second embodiment of the conveying device provided in this application;

[0018] Figure 12 This is a schematic diagram of the second pose structure of a second embodiment of the conveying device provided in this application.

[0019] Figure 13A bottom view structural schematic diagram of a second embodiment of the conveying device provided in this application;

[0020] Figure 14 A schematic diagram of the first pose of a third embodiment of the conveying device provided in this application.

[0021] Figure 15 This is a schematic diagram of the second pose structure of a third embodiment of the conveying device provided in this application.

[0022] Figure 16 A schematic diagram of the first embodiment of the power source for the conveying device provided in this application;

[0023] Figure 17 One of the cross-sectional schematic diagrams of a first embodiment of the power source for the conveying device provided in this application;

[0024] Figure 18 A second cross-sectional schematic diagram of the first embodiment of the power source for the conveying device provided in this application;

[0025] Figure 19 A schematic diagram of a second embodiment of the power source for the conveying device provided in this application.

[0026] Figure 20 A cross-sectional schematic diagram of a second option for the power source of the conveying device provided in the embodiments of this application;

[0027] Figure 21 A partial cross-sectional schematic diagram of a second scheme for the power source of the conveying device provided in the embodiments of this application;

[0028] Figure 22 This is a schematic diagram of the pressure-holding mechanism of the conveying device provided in the embodiments of this application;

[0029] Figure 23 An exploded view of the pressure-holding mechanism of the conveying device provided in the embodiments of this application;

[0030] Figure 24 A cross-sectional schematic diagram of the pressure-holding mechanism of the conveying device provided in the embodiments of this application;

[0031] Figure 25 This is a schematic diagram of the pressure relief mechanism of the conveying device provided in the embodiments of this application;

[0032] Figure 26 One of the cross-sectional schematic diagrams of the pressure relief mechanism of the conveying device provided in the embodiments of this application;

[0033] Figure 27 A second cross-sectional schematic diagram of the pressure relief mechanism of the conveying device provided in the embodiments of this application;

[0034] Figure 28 A schematic diagram of the first embodiment of the recycling mechanism of the conveying device provided in this application;

[0035] Figure 29 A cross-sectional schematic diagram of a first embodiment of the recycling mechanism of the conveying device provided in this application;

[0036] Figure 30 A schematic diagram of the second embodiment of the recycling mechanism of the conveying device provided in this application;

[0037] Figure 31 A cross-sectional schematic diagram of a second embodiment of the recycling mechanism of the conveying device provided in this application.

[0038] Explanation of reference numerals in the attached figures

[0039] 1-Connecting frame; 11-Frame body; 13-First support; 14-Second support; 15-Linkage mechanism; 1511-First link; 1512-Second link; 152-Linking rod; 16-Hinge mechanism; 161-First hinge; 162-Second hinge; 17-Slide groove; 18-Blocking component; 181-Handle component; 19-Lifting mounting hole; 2-Lifting mechanism; 21-Piston lifting assembly; 211-Pressure chamber; 212-Connecting port; 213-Piston cylinder; 214-First opening; 215-Baffle; 216-Recess; 221-Piston component; 222-First piston component; 2221-Piston hole; 2222-Entry groove; 2223-First sealing... 2224-First limiting part; 223-Second piston part; 2231-Bearing groove; 2232-Second limiting part; 2233-Third limiting part; 3-Roller assembly; 31-Roller; 32-Roller bracket; 33-Planar bearing; 332-Ball; 4-Transmission pipeline; 41-Adapter; 5-Power source; 51-Medium base; 511-Medium cavity; 512-Flow port; 513-Medium injection port; 514-Sealing plug; 52-Force application component; 521-Extrusion part; 522-Force application rod; 53-Self-locking structure; 531-Hook; 5311-Hook part; 532-Slot; 533-Hook restoration part; 534-Hook unlocking part; 53 5-Positioning pin; 536-Positioning hole; 537-Self-locking hole; 538-Positioning pin reset part; 539-Positioning pin unlocking part; 54-Pump; 55-Reversing valve; 551-Valve body; 5511-Reversing chamber; 5512-Pump inlet; 5513-Pump outlet; 5514-Medium inlet; 5515-Medium outlet; 552-Reversing plunger; 5521-Return hole; 5522-First connecting part; 5523-Second connecting part; 553-Reversing power component; 6-Pressure holding mechanism; 61-Pressure holding housing; 611-Passage inlet; 612-Passage outlet; 613-Pressure relief port; 614-Pressure holding seat; 615-Sealing seat; 616-Pressure holding cover; 62 - Valve core; 63 - Pressure holding and recovery component; 64 - Pressure holding chamber; 7 - Pressure relief mechanism; 71 - Pressure relief housing; 711 - Pressure relief mounting port; 72 - Pressure relief component; 721 - Pressure relief port; 73 - Pressure relief receiving chamber; 731 - Flow chamber; 732 - Pressure relief chamber; 74 - Pressure relief recovery component; 8 - Recovery mechanism; 81 - Recovery housing; 811 - Recovery port; 812 - Recovery operation port; 82 - Recovery piston; 83 - Recovery chamber; 84 - Recovery recovery component; 85 - Crank connecting rod mechanism; 851 - Crank pedal; 852 - Recovery connecting rod; 853 - Guide seat; 8531 - Guide groove; a - First direction; b - Second direction; c - Third direction; m - First distance; n - Second distance. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0045] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0048] The following is a detailed description of this application.

[0049] In industrial production and equipment installation scenarios, material handling is essential. Existing material handling equipment typically includes pallet jacks and forklifts. However, for certain specific applications, such as the installation and handling of home appliances, general handling equipment is unsuitable due to its size and design limitations. For example, when handling embedded appliances, the installation space is often small and compact. The only points of leverage for the appliance are the front side wall and the bottom. The front side is only suitable for pushing in, making other operations difficult. The bottom space of the appliance is also generally quite limited, making existing handling equipment incompatible and thus impossible to move.

[0050] Based on this, this application provides a handling device that can be adapted to handling scenarios with limited space and has a large load-bearing capacity.

[0051] For example, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The conveying device provided in this application includes a connecting frame 1 and a plurality of lifting mechanisms 2. One of the lifting mechanisms 2 includes a piston lifting assembly 21, which is mounted on the connecting frame 1. The piston lifting assembly 21 can extend and retract along a first direction a. The extension and retraction end of the piston lifting assembly 21 is connected to the roller assembly 3. The first direction a is a vertical direction. When the piston lifting assembly 21 is in a retracted state, the height of the lifting mechanism 2 is less than 30mm.

[0052] In the technical solution of this application embodiment, the lifting mechanism 2 is used to carry the target object to be transported, and the connecting frame 1 is used to connect multiple lifting mechanisms 2. Multiple lifting mechanisms 2 are provided on the connecting frame 1. Specifically, one of the multiple lifting mechanisms 2 includes a piston lifting assembly 21 and a roller assembly 3. The roller assembly 3 contacts the ground, facilitating the movement of the entire connecting frame 1 and the target object carried on the lifting mechanism 2. When transport is required, the piston lifting assembly 21 is first in a retracted state, and the transport device is extended under the target object to be transported. Then, the piston lifting assembly 21 can drive the roller assembly 3 to move in a first direction, allowing the transport device to lift the target object, lifting the entire target object off the ground. Through the rolling of the roller assembly 3 with the ground, transport and displacement can be easily performed. Moreover, when the piston lifting assembly 21 is in a retracted state, the height of the lifting mechanism 2 is less than 30mm. The piston lifting assembly 21 of the lifting mechanism 2 is connected to the connecting frame 1. The roller assembly 3 is set at one end of the piston lifting assembly 21, which allows for a large range of changes in the overall height of the handling device. Furthermore, by designing the lifting distance of the lifting mechanism 2, it can adapt to the handling of target objects with different ground clearances. Since the piston lifting assembly 21 is in a retracted state, the height of the lifting mechanism 2 is less than 30mm, making it suitable for handling heavy objects in low and narrow spaces.

[0053] The target object can be equipment or materials to be transported, such as refrigerators, washing machines, and standing air conditioners. The piston lifting assembly 21 can achieve lifting by introducing a medium, which can be any medium capable of generating thrust, including gaseous and liquid media. The gaseous medium can be compressed air; the liquid medium can be hydraulic oil, water glycol, glycerin, water, etc. Sealing and sliding refers to the ability of two components to maintain a sealed state at their contact points while still allowing for sliding. The sealing and sliding mechanism of this application, referencing structures such as cylinders, hydraulic cylinders, and syringes, allows for a slidable connection between a flexible piston head and the inner wall of the chamber.

[0054] The piston lifting assembly 21 is mounted on the connecting frame 1. The telescopic end of the piston lifting assembly 21 is connected to the roller assembly 3, thus clarifying the connection relationship between the piston lifting assembly 21, the connecting frame 1, and the roller assembly 3. The piston lifting assembly 21 is fixedly connected to the connecting frame 1, and the roller assembly 3 is fixed to the telescopic end of the piston lifting assembly 21.

[0055] Because the bottom space of objects such as household appliances is very narrow, in order to ensure that the handling device has a sufficiently small thickness before lifting to accommodate the handling of objects with limited height, the height of the lifting mechanism 2 should be as small as possible when the piston lifting assembly 21 is in the retracted state. When the piston lifting assembly 21 is in the retracted state, the height of the lifting mechanism 2 is less than 30mm. The lifting mechanism 2 can have various possible dimensions when the piston lifting assembly 21 is in the retracted state, as shown in the reference... Figure 5 The first distance m, for example, is less than 28mm, less than 25mm, less than 22mm, less than 20mm, less than 18mm, less than 15mm, etc., thus making it suitable for transporting targets with narrow heights. When the piston lifting assembly 21 is in the retracted state, the smaller the height of the lifting mechanism 2, the more suitable the transport device is for transporting targets with smaller bottom spaces.

[0056] Meanwhile, the lifting stroke of the piston lifting assembly 21 can also be set in different ways, such as greater than 10mm, greater than 12mm, greater than 13mm, greater than 14mm, greater than 15mm, greater than 18mm, etc. It should be noted that the lifting stroke of the piston lifting assembly 21 refers to the height value that the piston lifting assembly 21 can change from the retracted state to the maximum lifting state, that is, the maximum lifting range of the piston lifting assembly 21. This lifting stroke can directly affect the maximum lifting height.

[0057] It should be noted that the lifting stroke of the piston lifting assembly 21 can be less than the height of the lifting mechanism 2 when the piston lifting assembly 21 is in the retracted state. The greater the lifting stroke of the piston lifting assembly 21, the larger the range of the bottom space of the target object that the conveying device can be used for.

[0058] To ensure that the conveying device has sufficient lifting height within a limited structural height to lift the target object, in some embodiments, this can be achieved by increasing the lifting stroke of the piston lifting assembly 21. For example, increasing the sliding length of the piston cylinder 213; or increasing the length of the piston component 221 itself; or using a multi-stage piston.

[0059] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 In some embodiments, the piston lifting assembly 2122 includes a piston cylinder 213 and at least two piston members 221, adjacent piston members 221 are slidably connected to each other along a first direction a, the piston cylinder 213 is connected to the connecting frame 1, the piston member 221 close to the piston cylinder 213 is slidably connected to the piston cylinder 213, and the piston member 221 away from the piston cylinder 213 is connected to the roller assembly 3.

[0060] Reference Figure 4 and Figure 6The piston cylinder 213 has a pressure chamber 211. The piston cylinder 213 has a first opening 214, which communicates with the pressure chamber 211. The upper end of the piston member 221 is slidably and sealably connected to the pressure chamber 211 through the first opening 214; in the contracted state, the piston member 221 contracts into the pressure chamber 211, and in the lifting state, the piston member 221 moves out of the pressure chamber 211.

[0061] The piston lifting assembly 21 includes at least two piston components 221, meaning that the piston lifting assembly 21 may have two, three, or even more piston components 221.

[0062] The embodiments of this application can achieve multi-stage piston lifting through a sealable sliding connection of at least two piston parts 221, which greatly improves the lifting stroke and can reduce the overall height when retracted.

[0063] Adjacent piston components 221 can be slidably connected in a sealable manner along the first direction a, allowing for further sealable sliding between adjacent piston components 221 and increasing the lifting stroke. Each set of adjacent piston components 221 provides a certain lifting stroke. That is, the lifting component 22 has a multi-stage piston structure; by increasing the number of stages of the piston components 221, the lifting stroke of the lifting mechanism 2 can be further increased, further expanding the applicability of the handling device.

[0064] For the first piston 222 and the second piston 223 in the adjacent piston components 221, the first piston 222 is provided with a piston hole 2221 that extends through along the first direction a, and one end of the first piston 222 is provided with a first limiting part 2224; the first end of the second piston 223 is provided with a second limiting part 2232, which passes through the piston hole 2221 and is slidably connected to the first piston 222; the second end of the second piston 223 is provided with a third limiting part 2233, and the first limiting part 2224 is located between the second limiting part 2232 and the third limiting part 2233. When the first piston 222 and the second piston 223 are in a contracted state, the third limiting part 2233 abuts against the first limiting part 2224, and the end of the first piston 222 away from the first limiting part 2224 is flush with the first end of the second piston 223.

[0065] When connecting multiple pistons, a piston hole 2221 can be provided through the upper piston member 221. In this way, the lower piston member 221 can retract as much as possible into the piston hole 2221 in the retracted state, further reducing the height. Here, since the first piston member 222 has a piston hole 2221 that extends along the first direction a, and the second limiting part 2232 of the second piston member 223 passes through the piston hole 2221 and is slidably connected to the first piston member 222 in a sealed manner, in the retracted state, the second limiting part 2232 can retract along the first direction a into the piston hole 2221 until it is flush with the upper end of the first piston member 221, thereby further reducing the overall height of the conveying device in the retracted state.

[0066] To facilitate the movement of the first piston 222 by the medium, refer to Figure 6 and Figure 7 The upper end face of the first piston member 222 is provided with an inlet groove 2222. Thus, when the first piston member 222 and the second piston member 223 are in the retracted state, the upper end face of the first piston member 222 can fit against the upper inner wall of the piston cylinder 21. At this time, if lifting is required, the medium can communicate with the piston hole 2221 through the inlet groove 2222. The inlet groove 2222 on the upper end face of the first piston member 222 facilitates the application of force by the medium to the first piston member 222, thereby pushing the first piston member 222 to move along the first direction a.

[0067] To facilitate the medium from pushing the first piston 222, the inlet groove 2222 can be provided on the upper end surface of the first piston 222.

[0068] Based on this, in order to enable the medium to apply force to multiple positions of the first piston 222, and to facilitate the flow of the medium and the movement of the first piston 222, refer to Figure 7 In some embodiments, there are at least two inlet slots 2222, which are spaced apart along the upper end face of the first piston member 222.

[0069] The inlet grooves 2222 can be set to at least two, arranged at intervals along the upper end face of the first piston 222. The medium can apply force to multiple positions on the upper end face of the first piston 222, which facilitates the movement of the piston. Alternatively, the inlet grooves 2222 can be evenly spaced along the upper end face of the first piston 222, so that the thrust of the medium on the first piston 222 is evenly balanced, preventing the first piston 222 from jamming due to uneven force.

[0070] Reference Figure 5 , Figure 6 , Figure 8The upper end face of the second piston 223 can close the piston hole 2221 of the first piston 222, so that the pressure chamber 211 and the piston hole 2221 can together form a space for the medium to be contained and flow. When the first piston 222 and the second piston 223 are in the contracted state, the upper end face of the second piston 223 can also be in contact with the end wall of the piston cylinder 213 (defining the upper inner wall of the pressure chamber 211). In this case, in order to facilitate the medium to apply pressure to the second piston 223, in some embodiments, the upper end face of the second piston 223 is provided with a bearing groove 2231. During the transition from the contracted state to the lifting state, the medium that enters the piston hole 2221 through the entry groove 2222 acts at least partially on the bearing groove 2231 to push the second piston 223 to move along the first direction a.

[0071] When the medium enters the pressure chamber 211, a portion of the medium flows through the inlet groove 2222 to the upper end face of the first piston 222, pushing the first piston 222 to move along the first direction a. Another portion can enter the bearing groove 2231 on the upper end face of the second piston 223 through the inlet groove 2222, pushing the second piston 223 to move along the first direction a.

[0072] It should be noted that the medium can simultaneously push the first piston 222 and the second piston 223 along the first direction a, or it can push the first piston 222 a certain distance first, and then push the second piston 223, or it can move the first piston 222 a certain distance along the first direction a, and then the medium acts on the bearing groove 2231 to push the second piston 223 along the first direction a. It is understood that as long as the multi-stage piston 221 can be opened to the required lifting height, the specific sequence of movement can be designed and implemented according to specific needs, and this application does not limit this.

[0073] To ensure uniform pressure from the medium on the second piston 223, facilitate its movement, and prevent jamming, refer to... Figure 8 In some embodiments, the bearing groove 2231 is an annular groove disposed around the upper surface of the second piston member 223.

[0074] During the movement of the first piston 222 and the second piston 223 along the first direction a, the maximum position of their movement can be limited to prevent the first piston 222 from dislodging from the piston cylinder 213 or the second piston 223 from dislodging from the piston hole 2221.

[0075] Specifically, refer to Figure 4 and Figure 6In some embodiments, the piston lifting assembly 21 further includes a baffle 215, which is disposed below the piston cylinder 213, and the outer wall of the first piston member 222 has a first sealing structure 2223 in the radial direction near the upper end.

[0076] The first piston 222 is disposed in the pressure chamber 211 through the first sealing structure 2223, and the second piston 223 is disposed in the piston hole 2221 in a sealable and slidable manner through the second limiting part 2232.

[0077] During the transition from the contraction state to the lifting state, the second limiting part 2232 will be blocked by the first limiting part 2224 and limited within the piston hole 2221, preventing the second piston 223 from coming out of the piston hole 2221 of the first piston 222.

[0078] During the transition from the lifting state to the retracting state, the third limiting part 2233 on the lower end face of the second piston 223 is blocked by the first limiting part 2224, so the second piston 223 will not completely retract into the piston hole 2221 of the first piston 222. The third limiting part 2233 can abut against the joint between the first limiting part 2224 and the second piston 223, which can play a protective role.

[0079] It should be noted that the specific structure of the first sealing structure 2223 and the second limiting part 2232 can be set according to actual needs. For example, refer to Figure 6 , Figure 7 The first sealing structure 2223 has two radially protruding ribs formed on the outer wall of the first piston member 222, and an annular groove defined inside. A sealing gasket is fitted inside the annular groove, and the sealing gasket is confined within the annular groove, allowing for a sealed sliding connection with the piston cylinder 213. Similarly, refer to... Figure 6 , Figure 8 The second limiting part 2232 can also be a solution of fitting a sealing gasket in an annular groove, which will not be elaborated here.

[0080] When a baffle 215 is provided below the piston cylinder 213, the first sealing structure 2223 is confined within the piston cylinder 213; when a first limiting portion 2224 is provided below the first piston member 222 and a third limiting portion 2233 is provided below the second piston member 223, the first limiting portion 2224 below the first piston is confined between the second limiting portion 2232 and the third limiting portion 2233. For ease of assembly, some components can be configured as detachable structures; specifically, refer to... Figure 4 and Figure 6 In some embodiments, the baffle 215 and the piston cylinder 213 are detachably connected, and / or the third limiting part 2233 and the second piston member 223 are detachably connected.

[0081] Since the baffle 215 and the piston cylinder 213 are detachable, when assembling the first piston component 222, the first piston component 222 can be inserted into the piston cylinder 213 without the baffle 215 fixed, and then the baffle 215 can be fixed below the piston cylinder 213 to complete the assembly of the first piston component 222 and the piston cylinder 213.

[0082] Since the third limiting part 2233 and the second piston member 223 are detachable, when assembling the second piston member 223, the second piston member 223 without the third limiting part 2233 can be installed from the upper end of the first piston member 222, and then the third limiting part 2233 can be fixed at the lower end of the second piston member 223 to complete the assembly of the second piston member 223 and the first piston member 222.

[0083] Reference Figure 4 In this embodiment, both the baffle 215 and the third limiting part 2233 can be annular structures. The baffle 215 and the piston cylinder 213 are fixed by multiple fastening structures. The fixing positions of the baffle 215 and the piston cylinder 213 are similar to the structure of a flange. Multiple fixing points are arranged at intervals around the periphery of the baffle 215 and the step. In addition, these fixing points can be fixed to the corresponding positions of the connecting frame 1. That is, while the baffle 215 and the piston cylinder 213 are fixed, the entire lifting mechanism 2 can also be fixed to the connecting frame 1. Of course, the third limiting part 2233 and the second piston member 223 can also be fixed with fasteners. The fastener fixing position can be set in the area where the projections of the third limiting part 2233 and the second piston member 223 overlap along the first direction a. The mounting hole of the fastener on the side of the third limiting part 2233 away from the second piston member 223 can be a countersunk hole. In this way, the end of the fastener can not be higher than the side of the third limiting part 2233 away from the second piston member 223.

[0084] In some embodiments of this application, reference is made to Figure 5 The piston cylinder 213 has a connecting port 212 on its circumferentially distributed sidewalls, which is used to connect to the power source.

[0085] The connecting port 212 is located on the side wall of the pressure chamber 211 distributed circumferentially, which does not affect the overall height of the handling device and facilitates handling.

[0086] The connecting port 212 is located radially on the outer side of the piston cylinder 213, and along the first direction a, the height of the connecting port 212 can be less than the thickness of the piston cylinder 213. (Refer to...) Figure 5 Here, the height of the connecting port 212 refers to the maximum distance that the outer contour of the solid structure forming the connecting port 212 can occupy along the first direction a, that is... Figure 5 The distance h in the middle.

[0087] The roller assembly 3 in the embodiments of this application can be implemented in various ways. For example, it can be a wheel, ball, or other related structure capable of rolling. During the transportation process, the transportation path and direction may be uncertain, and it may be necessary to change direction at any time. In order to facilitate transportation and prevent the roller assembly 3 from getting stuck, the roller assembly 3 can be configured to have a structure that can roll in multiple directions.

[0088] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 The diagram illustrates an implementation of a roller assembly 3, which includes a roller 31 and a roller bracket 32. One end of the roller bracket 32 ​​is rotatably connected to the piston lifting assembly 21, and the rotation axis of the roller bracket 32 ​​is parallel to the first direction a. The other end of the roller 31 is rotatably connected to the roller bracket 32, and the rotation axis of the roller 31 is perpendicular to the first direction a. The rotation axes of the roller 31 and the roller bracket 32 ​​are spaced apart.

[0089] When the transport device moves, the roller bracket 32 ​​can rotate according to the magnitude of the friction of the roller 31. The roller bracket 32 ​​is equivalent to a following state. At the lower end of the roller bracket 32, the roller 31 can roll smoothly, thus achieving the effect of a universal wheel, allowing the target object to be moved in any direction for convenient transport.

[0090] The rotation axis of roller 31 and the rotation axis of roller bracket 32 ​​are spaced apart, that is, the rotation axis of roller 31 and the rotation axis of roller bracket 32 ​​are not directly stacked in the first direction a, which facilitates the arrangement in the height direction, reduces the overall height required for the layout, and reduces the impact on the height of the entire handling device.

[0091] Roller assembly 3 also includes a plane bearing 33, and one end of roller bracket 32 ​​is rotatably connected to piston lifting assembly 21 via the plane bearing 33.

[0092] It should be noted that a bearing can be directly installed between the roller bracket 32 ​​and the lifting component 22. Compared with other types of bearings, the flat bearing 33 achieves smooth and stable rotation with a smaller thickness space along the first direction a. It also has a simple and easy-to-implement structure, reduces the number of parts, and helps to reduce the overall height of the handling device, further improving its applicability.

[0093] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6In the roller assembly 3 of this application embodiment, the roller bracket 32 ​​can be L-shaped. The first end of the roller bracket 32 ​​is rotatably connected to the end of the second piston member 223; the second end of the roller bracket 32 ​​is connected to the roller 31. The first end of the roller bracket 32 ​​can be a disc-shaped structure, forming a chamber with the end of the second piston member 223 to accommodate multiple balls 332, thus constituting a planar bearing 33. The portion of the roller bracket 32 ​​connected to the disc-shaped structure can be two ribs, and the space formed inside can accommodate the roller 31, reducing weight and facilitating roller 31 installation. The roller 31 can be fixed by a pin passing through the two ribs and through the central shaft of the roller 31.

[0094] Reference Figure 5 and Figure 6 In order to further reduce the height of the lifting mechanism 2 in the retracted state, in some embodiments, the end of the piston lifting assembly 21 connected to the roller assembly 3 has a recess 216, and the roller assembly 3 is disposed in the recess 216.

[0095] In this way, at least a portion of the roller assembly 3 is located within the recess 216, which helps to reduce the height of the lifting mechanism 2 in the retracted state and improve the applicability of the conveying device.

[0096] Reference Figure 1 In some embodiments, the connecting frame 1 includes a frame 11, which is provided with at least three lifting mechanisms 2.

[0097] The connecting frame 1 is used to connect the lifting mechanism 2. The setting of at least three lifting mechanisms 2 can support at least three positions of the target object, improve the balance of the target object, and prevent the target object from tipping over.

[0098] Of course, provided that stability can be improved, the number of lifting mechanisms 2 can be four, five, or six, etc., and they should be evenly distributed to further stabilize and support the system. (Refer to...) Figure 1 and Figure 2 The frame 11 is connected to four lifting mechanisms 2, which are located near the four ends of the connecting frame 1 and can provide stable support.

[0099] The conveying device has its lowest overall thickness in the retracted state and its highest overall thickness in the lifted state. To facilitate easy insertion of the conveying device under the target object in the retracted state, refer to... Figure 5 When the conveying device is in the retracted state, the rollers 31 of the roller assembly 3 protrude at least partially from below the connecting frame 1. That is, in this scheme, the overall thickness of the conveying device in both the retracted and raised states is the distance from the lower end of the rollers 31 of the roller assembly 3 to the upper surface of the support.

[0100] The lifting mechanism 2 can be fixed to the side of the connecting frame 1, or it can be fixed in the through hole opened on the connecting frame 1, which helps to reduce the overall height of the handling device.

[0101] Reference Figure 9 , Figure 10 In some embodiments of this application, the connecting frame 1 is provided with a lifting mounting hole 19, and the lifting mechanism 2 passes through the lifting mounting hole 19 and is fixed on the connecting frame 1.

[0102] By having the lifting mechanism 2 pass through the hole in the connecting frame 1, it is beneficial to reduce the overall thickness of the handling device and further improve its applicability.

[0103] Some objects are equipped with height-adjustable support legs, such as refrigerators and washing machines, which allows for an adjustable range of ground clearance. Based on this, some embodiments of this application include corresponding settings for the overall adjustable height.

[0104] Specifically, refer to Figure 5 The minimum distance from the upper surface of the lifting mechanism 2 to the lower end of the roller assembly 3 is the first distance m, as referenced. Figure 6 The maximum distance from the upper surface of the lifting mechanism 2 to the lower end of the roller assembly 3 is the second distance n, the minimum distance between the lower surface of the target object and the ground is the third distance, and the maximum distance is the fourth distance; wherein, the first distance m is less than the third distance, and the second distance n is greater than the third distance and less than the fourth distance.

[0105] Because the first distance m is less than the third distance, the transport device can smoothly enter under the target object at its minimum height; because the second distance n is greater than the third distance, the transport device can smoothly lift the target object and make it easy to transport; because the second distance n is less than the fourth distance, when the transport device transports the target object to the target position, the distance can be adjusted to the fourth distance through the target object, so that the target object can be directly supported on the ground by itself, and the transport device can also be easily removed.

[0106] For example, the first distance m from the upper surface of the lifting mechanism 2 to the lower end of the roller assembly 3 can be 15.7 mm, the second distance n can be 28.9 mm (i.e., the lifting stroke is 13.2 mm), the third distance between the lower surface of the target object and the ground can be 16.7 mm, and the fourth distance can be 29.7 mm. Of course, this is just a specific example. It is understood that, based on applicability, the first distance m, the second distance n, the third distance, and the fourth distance can all have a certain range of adjustability, for example, they can fluctuate within the above dimensions by 0.1-1.5 mm.

[0107] In the moving or installation of home appliances and other equipment, the moving equipment often needs to be carried to the site by workers, and then taken away after the move is completed. Therefore, the portability and storability of the moving equipment are particularly important.

[0108] To facilitate carrying and storage, the connecting frame 1 in this embodiment can undergo a certain degree of posture transformation, thereby changing the space it occupies and making it easier to carry and store. Specifically, this can be achieved through various methods such as folding, rotating, translating, and elastic deformation. Moreover, the connecting frame 1 can be composed of at least two separate structures, and this application does not impose any limitations on this.

[0109] For ease of description, the following description uses a scheme where the connecting frame 1 includes two separate structures as an example. (Refer to...) Figure 1 and Figure 9 In some embodiments, the connecting frame 1 includes a first support 13 and a second support 14. A portion of the plurality of lifting mechanisms 2 is disposed on the first support 13 and another portion is disposed on the second support 14. The first support 13 and the second support 14 are movably connected. When the first support 13 and the second support 14 are relatively movable, they have at least a first position and a second position. In the first position, the first support 13 and the second support 14 are close together. In the second position, the first support 13 and the second support 14 are separated.

[0110] For example, refer to Figure 1 In the first position, the first support 13 and the second support 14 can be fitted side by side along the third direction c; refer to Figure 9 In the second pose, the first support 13 and the second support 14 move away from each other to the maximum distance along the third direction c;

[0111] Among them, the second direction b and the third direction c are perpendicular, and both are perpendicular to the first direction a.

[0112] In this way, the connecting frame 1 can be configured as an openable and closable structure. When the target object does not need to be moved, it can be folded into the first position for easy storage and carrying. When the target object needs to be moved, it can be opened to the second position for easy carrying of the target object. In addition, the first support 13 and the second support 14 can be translated along the third direction c. The change of position during transportation will not occupy additional space, making it easier to operate.

[0113] The first support 13 and the second support 14 are movably connected, which can be a hinge or a flexible connection, etc. Of course, having at least a first pose and a second pose means that in some schemes there are only a first pose and a second pose, while in other schemes there may be more than three poses, such as a third pose, a fourth pose, etc.

[0114] In some embodiments, when the first support 13 and the second support 14 are moving relative to each other, a third pose is also included; in the third pose, the distance between the first support 13 and the second support 14 is less than the distance between the first support 13 and the second support 14 in the second pose.

[0115] In this way, the first support 13 and the second support 14 can move in multiple positions to adapt to objects of different sizes. Different positions can be used to adapt to different application scenarios.

[0116] Below, taking the scheme of connecting frame 1 including a first support 13 and a second support 14 that can be movably connected as an example, we will specifically introduce some embodiments in which the first support 13 and the second support 14 can be movably connected. The movable connection of the first support 13 and the second support 14 can be an opening and closing structure similar to scissors, a translational sliding method, or a folding method, etc.

[0117] Example 1: The first support 13 and the second support 14 are movably connected.

[0118] Reference Figure 1 and Figure 9 In some embodiments, the middle portion of the first bracket 13 and the middle portion of the second bracket 14 are rotatably connected.

[0119] Furthermore, the first support 13 and the second support 14 can form an openable and closable structure. When the first support 13 and the second support 14 rotate relative to each other, the first position and the second position can be switched.

[0120] The first support 13 and the second support 14 are directly rotatably connected at their midpoints, allowing them to rotate relative to each other and thus switch between the first and second poses. The structure is simple, easy to implement, and possesses high overall strength.

[0121] The middle sections of the first support 13 and the second support 14 are rotatably connected to form an openable and closable structure, resembling a pair of scissors. The two arms of the scissors are the first support 13 and the second support 14 themselves. This structure is easy to implement, has few parts, and is stable. Moreover, this opening and closing structure can be easily opened and closed, and the space occupied by opening and closing is within the plane formed by the second direction b and the third direction c, without affecting the lifting space in the first direction a.

[0122] Of course, in some embodiments of this application, the transport device also includes a transport pipeline 4, which is used to transport the medium through the communication port 212 to the pressure chamber 211. At least a portion of the transport pipeline 4 is located below the first support 13 and the second support 14.

[0123] The medium is input through the transmission pipeline 4, which facilitates lifting. Moreover, at least a portion of the transmission pipeline 4 is located below the first support 13 and the second support 14, avoiding interference with the bearing space and facilitating storage and repositioning.

[0124] Since the connecting frame 1 may include a first support 13 and a second support 14 that can be movably connected, when the first support 13 and the second support 14 move relative to each other, they may pull or entangle the transmission pipe 4. Therefore, the transmission pipe 4 can be fixedly installed below the connecting frame 1.

[0125] To address the layout issue of the transmission pipeline 4 at the movably connected position of the first support 13 and the second support 14, refer to Figure 2 In some embodiments, the transmission pipeline 4 includes an adapter 41, and there are at least two lifting mechanisms 2. The adapter 41 is disposed at the movable connection between the first support 13 and the second support 14. The adapter 41 is used to distribute the medium of the transmission pipeline 4 to the pressure chambers 211 of different lifting mechanisms 2. The transmission pipeline 4 is arranged along the extension direction of the first support 13 and the second support 14.

[0126] The adapter 41 is located at the movable connection between the first bracket 13 and the second bracket 14, and can be fixed on the rotating shaft. This prevents significant displacement of the adapter 41 when the first bracket 13 and the second bracket 14 rotate, thus avoiding pulling or tangling of the transmission pipeline 4. Simultaneously, the adapter 41 can facilitate the transfer of two or more channels. When there are at least two lifting mechanisms 2, the adapter 41 can be used to distribute the medium to the pressure chambers 211 of different lifting mechanisms 2. The adapter 41's location at the movable connection between the first bracket 13 and the second bracket 14 allows for convenient layout of the transmission pipeline 4 along the extension direction of the first bracket 13 and the second bracket 14. Furthermore, the adapter 41 at their movable connection connects the transmission pipelines 4 of different branches. This ensures that the transmission pipeline 4 is completely located below the connecting frame 1 and is not pulled, bent, or tangled due to the movement of the first bracket 13 and the second bracket 14, improving the convenience of the handling device.

[0127] Reference Figure 9 and Figure 10 In some embodiments of the conveying device of this application, the connecting frame 1 further includes a retaining member 18, which is disposed on the first support 13 and / or the second support 14. In the second position, the retaining member 18 can limit the periphery of the target object.

[0128] The enclosure component 18 can provide a certain enclosure and restriction for the side of the target object when the connecting frame 1 is carrying the target object, so as to prevent the target object from tipping over or causing safety accidents during transportation.

[0129] Specifically, in this embodiment, the middle part of the first support 13 and the middle part of the second support 14 are rotatably connected, forming an openable and closable structure, as shown in the figure. Figure 9 Four lifting mechanisms 2 can be set up, located at both ends of the first support 13 and the second support 14 respectively. In this way, the entire conveying device can be subjected to uniform force and bear stable load when lifting the target object.

[0130] The enclosure 18 can be installed at both ends of the first bracket 13 and the second bracket 14, or it can be installed only on one side of the first bracket 13 and the second bracket 14 that is convenient for operation. In this way, during transportation, the side without the enclosure 18 can be easily extended under the target object, while the side with the enclosure 18 can be easily observed, making it convenient for workers to operate.

[0131] The shape of the enclosure member 18 can be set according to actual needs. For example, the enclosure member 18 is L-shaped in the plane formed by the second direction b and the third direction c. In the third direction c, the upper edge is higher than the upper edge of the lifting mechanism 2. In this way, when the first support 13 and the second support 14 are in the second position, the L-shaped enclosure member 18 can just fit and surround the two corners of the square target object, thus effectively limiting the periphery of the target object.

[0132] When the first support 13 and the second support 14 are in the first position, they can be placed side by side, occupying very little space. At this time, the two enclosure members 18 are at a certain angle and are also placed side by side with the first support 13 and the second support 14. The length of the two enclosure members 18 can be set within a certain range. For example, when the first support 13 and the second support 14 are in the first position, the length of the two enclosure members 18 along the third direction c is equal to or less than the maximum distance between the first support 13 and the second support 14 along the third direction c. Thus, in the first position, the two enclosure members 18 will not exceed the maximum length of the transport device along the third direction c, and will not affect the overall storage size along the third direction c, facilitating storage and carrying.

[0133] Moreover, refer to Figure 9 and Figure 10 In embodiments of this application, the handling device may further include a handle 181, which may be disposed on the side where the enclosure 18 is located on the first support 13 and the second support 14, facilitating manual operation by workers. The handle 181 may be a rod-shaped structure extending along the second direction b, with a handle 181 provided on both the first support 13 and the second support 14 for convenient two-handed operation. Furthermore, the handle 181 may be rotatably connected to its corresponding position (first support 13 or second support 14), allowing the handle 181 to change its rotation angle as needed during relative movement of the first support 13 and the second support 14, making operation more convenient.

[0134] To facilitate handling, a traction unit can be provided. This traction unit can be a pull ring, pull rope, or hook for easy attachment of a traction rope, etc., installed on the handling device. The traction unit can be installed on the connecting frame 1 or on the handle 181. For example, a traction hole is formed on the handle 181 to facilitate traction.

[0135] Embodiment 2: The first support 13 and the second support 14 are movably connected.

[0136] Reference Figure 11 , Figure 12 , Figure 13 In some other embodiments, the connecting frame 1 further includes a linkage mechanism 15, with the first bracket 13 and the second bracket 14 rotatably connected to the two ends of the linkage mechanism 15, respectively.

[0137] In this way, when the first support 13 and the second support 14 rotate relative to the linkage mechanism 15, the first position and the second position can be switched.

[0138] Here, the first support 13 and the second support 14 are connected by a linkage mechanism 15. The rotation of the first support 13 and the second support 14 relative to the linkage mechanism 15 allows for switching between a first position and a second position. The linkage mechanism 15 is simple to set up and easy to implement, allowing for adaptable settings of multiple sizes and specifications, offering flexibility. Moreover, the setting and connection of the linkage mechanism 15 has minimal impact on the structure of the first support 13 and the second support 14 themselves, facilitating production. Furthermore, sufficient connection strength can be easily ensured through the selection of dimensions or materials.

[0139] The linkage mechanism 15 may include a link, to which both the first support 13 and the second support 14 are hinged, allowing the first support 13 and the second support 14 to switch between a first position and a second position. The length of the link can be flexibly set according to actual needs.

[0140] In some embodiments, the first end of the linkage mechanism 15 is rotatably connected to the first bracket 13, and the second end of the linkage mechanism 15 is rotatably slidably connected to the second bracket 14 along the extending direction of the second bracket 14.

[0141] Alternatively, the first end of the linkage mechanism 15 is rotatably and slidably connected to the first bracket 13 along the extending direction of the first bracket 13, and the second end of the linkage mechanism 15 is rotatably and slidably connected to the second bracket 14 along the extending direction of the second bracket 14.

[0142] The linkage mechanism 15 may also include two or more links, and the two or more links may be connected sequentially, arranged side by side, or connected to each other, etc.

[0143] In some embodiments, the linkage mechanism 15 includes at least a first link 1511 and a second link 1512, one end of the first link 1511 and one end of the second link 1512 are rotatably connected, the first bracket 13 is rotatably connected to the other end of the first link 1511, and the second bracket 14 is rotatably connected to the other end of the second link 1512.

[0144] Here, the linkage mechanism 15 includes at least two links, which makes the length setting of the linkage mechanism 15 more flexible. More than three rotation points are added between the first link 1511 and the second link 1512, making the relative movement of the first link 1511 and the second link 1512 more flexible. During switching, various different poses can be switched as needed, further increasing the applicability range.

[0145] Of course, in some embodiments, there can be two or more linkage mechanisms 15, making the connection between the first bracket 13 and the second bracket 14 more stable.

[0146] For example, refer to Figure 12 The linkage mechanism 15 consists of at least two sets, and the arrangement direction of the at least two sets of linkage mechanisms 15 includes the extension direction of the first support.

[0147] In this way, at least two sets of linkage mechanisms 15 can be connected at two positions of the first bracket 13 and the second bracket 14 respectively, which improves the strength of the connection between the first bracket 13 and the second bracket 14 and enhances the stability during switching.

[0148] When the linkage mechanism 15 includes at least two sets, in order to improve the synergy between the linkage mechanisms 15, some additional structures can be added between the linkage mechanisms 15 to facilitate mutual coordination and make the pose changes of the first support 13 and the second support 14 more stable.

[0149] For example, refer to Figure 12 In some embodiments, the linkage mechanism 15 further includes a connecting rod 152, the two ends of which are rotatably connected to the first connecting rod 1511 and the second connecting rod 1512 in two adjacent linkage mechanisms 15.

[0150] In this way, the various linkage mechanisms 15 are rotatably connected by the linkage 152, making the linkage between these linkage mechanisms 15 smoother, and allowing different linkage mechanisms 15 to restrain and follow each other. Moreover, the linkage 152 can further improve the strength and the stability when switching between the first support 13 and the second support 14.

[0151] Of course, in some embodiments, the linkage 152 can also connect any two sets of linkage mechanisms 15, and is not limited to connecting only two adjacent sets of linkage mechanisms 15. Furthermore, the linkage 152 can also connect three or more linkage mechanisms 15, and the relative positional relationship of the connected linkage mechanisms 15 is not necessarily adjacent.

[0152] In the linkage mechanism 15, the links are connected end-to-end. When the number of links in the linkage mechanism 15 is odd, the transformation of the first support 13 and the second support 14 to the first position may result in an imbalance in the number of links on both sides after folding, and the first support 13 and the second support 14 may be misaligned in the third direction c. When the number of links in the linkage group 151 is even, the transformation of the first support 13 and the second support 14 to the first position can make the number of links on both sides equal after folding. This is beneficial for the first support 13 and the second support 14 to align in the third direction c, preventing misalignment and saving the space occupied by the connecting frame 1 along the second direction b in the first position. Based on this, the length of the links in the linkage mechanism 15 can be set to be the same, which can make the first support 13 and the second support 14 aligned in the third direction c after folding. Furthermore, the lengths of the fixed rod and the connecting rods in the linkage 151 can also be set to be the same. As a result, the linkage 152 and the interconnected connecting rods can form a parallelogram linkage mechanism 15, which is more conducive to the switching of positions.

[0153] Reference Figure 12 Taking the linkage mechanism 15 as an example, which consists of a first link 1511 and a second link 1512, the lengths of the first link 1511, the second link 1512, and the connecting rod 152 are the same.

[0154] That is, the lengths of the links in the linkage mechanism 15 (including the first link 1511, the second link 1512, and the connecting rod 152) are basically the same. Thus, the multi-link mechanism 15, which is equivalent to a parallelogram, is formed. In the two states of the first support 13 and the second support 14 (i.e., the first position and the second position), the first support 13 and the second support 14 are equivalent to translating along the third direction c. Therefore, the length position along the second direction b remains unchanged. This facilitates accurate alignment of the object to be transported and makes storage and carrying more convenient.

[0155] It should be noted that the lengths of the links in linkage mechanism 15 are basically consistent, referring to the hinge points where the links are hinged together, not the entire outer contour of the link. This is because the length that cannot be changed during rotation is the distance between the two hinge points in each link, not the length of the link's outer contour itself.

[0156] In this embodiment, the transmission pipeline 4 is also located below the first support 13 and the second support 14, and can be positioned at a location where the first support 13 and the second support 14 are movably connected. Furthermore, similarly, there are at least two lifting mechanisms 2; for example, there are four lifting mechanisms 2, respectively positioned near both ends of the first support 13 and the second support 14.

[0157] Specifically, the transmission pipeline 4 includes an adapter 41, which is located at the movable connection between the first support 13 and the second support 14. The adapter 41 is used to distribute the medium of the transmission pipeline 4 to the pressure chambers 211 of different lifting mechanisms 2.

[0158] The adapter 41 can be located below the fixed rod to connect the media pipelines of the four lifting mechanisms 2. The four media pipelines are respectively located below the connecting rods in the two linkage groups 151. With the help of the parallelogram linkage mechanism 15, each connecting rod is a side of the parallelogram. The length of each side remains unchanged during the folding process, so that the transmission pipeline 4 will not have a redundant outer frame during the folding process and will not be pulled or tangled.

[0159] Similarly, in these embodiments, the connecting frame 1 may also include a barrier 18, a handle 181, a traction part, and other related structures, which will not be described in detail here.

[0160] Embodiment 3: The first support 13 and the second support 14 are movably connected.

[0161] Reference Figure 14 Figure 15 In this embodiment, the connecting frame 1 further includes a hinge mechanism 16, which includes a first hinge member 161 and a second hinge member 162. The middle portions of the first hinge member 161 and the second hinge member 162 are rotatably connected. The first end of the first hinge member 161 is hinged to the first bracket 13, and the second end of the first hinge member 161 is rotatably and slidably connected to the second bracket 14 along the extending direction of the second bracket 14. The first end of the second hinge member 162 is hinged to the second bracket 14, and the second end is rotatably and slidably connected to the first bracket 13 along the extending direction of the first bracket 13.

[0162] Alternatively, the first end of the first hinge 161 is rotatably and slidably connected to the first bracket 13 along the extending direction of the first bracket 13, the second end of the first hinge 161 is rotatably and slidably connected to the second bracket 14 along the extending direction of the second bracket 14, the first end of the second hinge 162 is rotatably and slidably connected to the second bracket 14 along the extending direction of the second bracket 14, and the second end is rotatably and slidably connected to the first bracket 13 along the extending direction of the first bracket 13.

[0163] In this way, the hinge mechanism 16 itself forms an openable and closable structure, and through its connection with the first support 13 and the second support 14, the first support 13 and the second support 14 can be movably connected, and the first position and the second position can be switched.

[0164] Specifically, refer to Figure 14 and Figure 15 Both the first bracket 13 and the second bracket 14 are provided with a sliding groove 17 along the second direction b. The first end of the first hinge member 161 is hinged to the first bracket 13, and the second end is rotatably slidably connected to the sliding groove 17 of the second bracket 14. The first end of the second hinge member 162 is hinged to the second bracket 14, and the second end is rotatably slidably connected to the sliding groove 17 of the first bracket 13.

[0165] The first hinge 161 and the second hinge 162 of the hinge mechanism 16 form an openable structure, similar to the shape of scissors. Based on this, the first support 13 and the second support 14 are connected to both sides of the hinge mechanism 16, enabling the first support 13 and the second support 14 to switch between a first position and a second position. During the switching process, since both the first hinge 161 and the second hinge 162 rotate around their central parts, the distance between the two ends of the first hinge 161 and the second hinge 162 along the second direction b continuously changes. Therefore, to adapt to this movement trajectory, when the first end of the first hinge 161 is hinged to the first support 13 and the first end of the second hinge 162 is hinged to the second support 14, both the first support 13 and the second support 14 are provided with a sliding groove 17 along the second direction b. Thus, the second end of the first hinge 161 can rotatably slide with the sliding groove 17 of the second support 14, and the second end of the second hinge 162 can rotatably slide with the sliding groove 17 of the first support 13.

[0166] The first bracket 13 and the second bracket 14 are connected by an openable hinge mechanism 16. The hinge mechanism 16 can be mass-produced in a standardized manner and then assembled with the first bracket 13 and the second bracket 14. The first bracket 13 and the second bracket 14 themselves have fewer structural requirements related to the hinge, which is convenient for design and does not affect the strength of the first bracket 13 and the second bracket 14.

[0167] To prevent jamming and improve the smoothness of switching, in some embodiments, the first hinge 161 and the second hinge 162 have the same length and are rotatably connected through the center position of the first hinge 161 and the second hinge 162.

[0168] Based on this, the lengths of the grooves 17 on the first bracket 13 and the second bracket 14 are the same, and their positions correspond along the third direction c.

[0169] The first hinge 161 and the second hinge 162 are of the same length and are rotatably connected at their center, ensuring that the first bracket 13 and the second bracket 14 will not be misaligned or misplacing before or after opening and closing. This facilitates accurate alignment under the target object and makes storage and carrying convenient.

[0170] In this embodiment, the transmission pipeline 4 can also be located below the first support 13 and the second support 14. However, since the second end of the first hinge 161 and the second end of the second hinge 162 both slide in the groove 17, the transmission pipeline 4 can avoid the first hinge 161 and the second hinge 162 to prevent the transmission pipeline 4 from being pulled or tangled.

[0171] For example, in some embodiments of this implementation, the transmission conduit 4 is positioned to avoid the location of the structure in which the first support 13 and the second support 14 are movably connected.

[0172] Here, in order to prevent the transmission pipe 4 from getting tangled due to the relative movement of the first support 13 and the second support 14, the transmission pipe 4 can be completely placed below the first support 13 and the second support 14. In this way, the transmission pipe 4 will move with the movement of the first support 13 and the second support 14 and will not interfere with the movable connection of the first support 13 and the second support 14, thereby avoiding pulling, bending or tangling, and is easy to implement.

[0173] Similarly, in these embodiments, the connecting frame 1 may also include a barrier 18, a handle 181, a traction part, and other related structures, which will not be described in detail here.

[0174] The connecting frame 1 can switch between multiple positions during the transition between the first support 13 and the second support 14, such as the first position, the second position, and the third position. Each position can adapt to different sizes or application requirements in different scenarios. In the corresponding position, the relative position between the first support 13 and the second support 14 can be locked to improve the stability of the handling device. For example, in the first position, which is often suitable for storage and carrying, the locking of the relative positions of the first support 13 and the second support 14 in this state makes storage and carrying more convenient and prevents accidental opening. In the second and third positions, the handling device carries the target object. If the relative position between the first support 13 and the second support 14 changes, it may cause uneven force distribution under the target object. Therefore, the relative position of the first support 13 and the second support 14 can also be locked in these positions.

[0175] In some embodiments, the connecting frame 1 may further include a locking structure, which is disposed on the first support 13 and the second support 14, or on the transmission path in which the first support 13 and the second support 14 are movably connected; in the second position, the locking structure can lock the relative positional relationship between the first support 13 and the second support 14.

[0176] It should be noted that the locking structure here can lock the relative positions of the first support 13 and the second support 14 when the connecting frame 1 is in the required position, thereby improving the stability and safety during handling. In some embodiments, it is only necessary to lock the second position. Of course, in other embodiments, the required position of the connecting frame 1 includes all or any position that the connecting frame 1 can be in, including but not limited to the first position, the second position, the third position, etc.

[0177] There are various ways to implement a locking structure, such as a snap-fit ​​structure, a fastener locking structure, or a pin locking structure.

[0178] For example, in some embodiments, the locking structure includes a first latching portion disposed on the first bracket 13 and a second latching portion disposed on the second bracket 14. In the second position, the first latching portion and the second latching portion engage to lock the relative positional relationship between the first bracket 13 and the second bracket 14.

[0179] In this way, the relative position of the first bracket 13 and the second bracket 14 can be locked by the first locking part and the second locking part respectively provided on the first bracket 13 and the second bracket 14. When the connecting frame 1 is in the required position, the locking of the first locking part and the second locking part can lock the relative position relationship between the first bracket 13 and the second bracket 14.

[0180] For example, in some embodiments, the locking structure further includes a limiting shaft, which is provided with limiting ribs or is a damping shaft. The first bracket 13 and the second bracket 14 are movably connected through the limiting shaft. In the first position and / or the second position, the relative positional relationship between the first bracket 13 and the second bracket 14 can be locked through the limiting shaft.

[0181] In this way, the angle and position of rotation are controlled by limiting ribs or damping shafts set at the rotation connection position, thereby locking the relative positional relationship between the first bracket 13 and the second bracket 14.

[0182] In the conveying device of this application, a power source needs to be input into the lifting mechanism 2 to achieve lifting. The power source can be implemented through external equipment or through a power input structure set in the conveying device itself. The power source can be implemented through a medium, which can be either gas or liquid.

[0183] Therefore, in some embodiments, reference is made to Figure 16 The conveying device of this application also includes a power source 5, which is connected to the piston lifting assembly 21 of the multiple lifting mechanisms 2 and is used to drive the piston lifting assembly 21 to lift.

[0184] The conveying device is equipped with a power source 5 that can input the medium into the pressure chamber 211 of the piston lifting assembly 21. During operation, the conveying device does not need to be connected to external equipment; it supplies the medium through its own built-in medium input. This facilitates operation and pressure maintenance during conveying.

[0185] There are various ways to implement power source 5. The most basic structure includes a chamber that can contain the medium and components that can act on the chamber to transfer the medium within it. The power source acting on the chamber containing the medium can be either manual or electrical. Two different embodiments are described below.

[0186] Example 1 of Power Source 5:

[0187] Reference Figure 16 , Figure 17 , Figure 18 In this embodiment, the power source 5 includes a medium base 51 with a medium cavity 511 and a force application component 52. The medium cavity 511 is connected to the piston lifting component 21. A part of the force application component 52 is disposed inside the medium cavity 511 and is sealed and movably connected to the medium base 51. The other part of the force application component 52 is disposed outside the medium cavity 511. The force application component 52 divides the medium cavity 511 into two sub-medium cavities, one of which is used to store the medium. The power source 5 also includes a self-locking structure 53, which is disposed on the medium base 51 and the other part of the force application component 52. When the piston lifting component 21 is raised, the self-locking structure 53 is used to lock the relative position between the force application component 52 and the medium base 51.

[0188] Specifically, the medium base 51 is provided with a flow port 512 for connecting the medium cavity 511 and the pressure cavity 211. When the force application component 52 is subjected to external force, it squeezes the medium cavity 511 to input the medium in the medium cavity 511 into the pressure cavity 211 through the flow port 512.

[0189] In the power source 5 of this embodiment, when the force application component 52 is subjected to external force, it can squeeze the medium cavity 511. As a result, the medium in the medium cavity 511 will increase the pressure due to the compression, and then be input into the pressure cavity 211 through the flow port 512, so that the lifting mechanism 2 can perform the lifting action.

[0190] Among them, the external force can be used to input the medium with the help of artificial external force. The overall structure is simple and easy to implement, and the failure rate and cost are relatively low.

[0191] After the medium is input into the pressure chamber 211 of the lifting mechanism 2 and the target object is lifted, it needs to be transported. During the transport process, it may be necessary to maintain the lifted state, that is, the medium needs to be pressurized. Therefore, it is necessary to prevent the medium from flowing back into the medium input structure. Since the power source 5 also includes a self-locking structure 53, the relative position between the force application component 52 and the medium base 51 is locked by the self-locking structure 53, thereby automatically preventing the medium from flowing back. At this time, the operator can release the force application component without affecting the lifting effect, and the operator can carry out the transport operation.

[0192] It should be noted that the volume of the medium cavity 511 of the power source 5 in this embodiment can be equal to the volume of the medium required for lifting. In this way, lifting can be achieved by outputting the medium in the medium cavity 511 in one operation, making the operation more convenient and faster. Based on this solution, the design of the self-locking structure 53 described above is more suitable. For example, by stepping on the force-applying component, the medium in the medium cavity 511 is input into the pressure chamber 211, and the lifting mechanism 3 is lifted to the required height. At this time, the self-locking structure 53 locks the relative position of the force-applying component and the medium base 51, maintaining the pressure in the medium cavity 511 and maintaining the lifting state.

[0193] To facilitate the application of external forces and ensure smooth operation, refer to Figure 17 and Figure 18 In some embodiments, the force-applying component 52 includes a pressing member 521 and a force-applying rod 522. A portion of the pressing member 521 is located inside the medium cavity 511 and can be slidably sealed with the medium base 51. Another portion of the pressing member 521 is located outside the medium cavity 511 and is slidably connected with the force-applying rod 522. The force-applying rod 522 is hinged to the medium base 51. When the force-applying rod 522 moves, it drives the pressing member 521 to slide in a sealed manner inside the medium cavity 511. A self-locking structure 53 is located on the force-applying rod 522 and the medium base 51.

[0194] In this embodiment, by applying external force to the force-applying rod 522, the extrusion member 521 can be driven to slide in a sealed manner within the medium cavity 511, thereby enabling the input of the medium into the pressure cavity 211. During operation, the force-applying member can be easily stepped on manually, further facilitating the handling process.

[0195] The hinged connection between the medium base 51 and the force-applying rod 522 allows the force-applying rod 522 to be rotatably fixed on the medium base 51. When the force-applying rod 522 is subjected to force, it can rotate relative to the medium base 51, generating a certain displacement. The extrusion member 521 and the force-applying rod 522 are slidably connected, so that when the force-applying rod 522 is subjected to force and displacement, it can drive the extrusion member 521 to move. At the same time, since the movement trajectory at the connection between the force-applying rod 522 and the extrusion member 521 is arc-shaped, while the movement trajectory of the extrusion member 521 in the medium cavity 511 is straight, the extrusion member 521 and the force-applying rod 522 are slidably connected to adapt to the conversion between the two movements.

[0196] To make operating the force-applying lever 522 easier, refer to Figure 17 and Figure 18 In some embodiments, the first end of the force-applying rod 522 is hinged to the medium base 51, the second end is the force-bearing side, and the extrusion member 521 is slidably connected to the first end and the second end of the force-applying rod 522.

[0197] In this way, the hinged position between the first end of the force-applying rod 522 and the medium base 51 is equivalent to the fulcrum of rotation, the second end of the force-applying rod 522 is the input part, and the sliding connection between the force-applying component and the extrusion component 521 is the output part. The entire structure utilizes the lever principle, and the torque at the second end of the force-applying rod 522 is greater than the torque at the extrusion component 521, which makes it easier to apply external force to the force-applying rod 522 and improves the operating experience.

[0198] It should be noted that the shape of the force-applying component, the shape of the medium base 51, and the size of the medium cavity 511 formed within the medium base 51 can all be set according to actual needs. For example, refer to... Figure 16 , Figure 17 , Figure 18 The force-applying component has a plate-like structure and an anti-slip structure on its upper surface, making it easy for workers to step on; the medium base 51 has a cylindrical medium cavity 511; the extrusion component 521 can be a conical piston adapted to the cylindrical medium cavity 511.

[0199] In this embodiment, the self-locking structure 53 can be implemented in various ways, such as by snap-fit, by pin, by solenoid valve control, etc.

[0200] For example, in some embodiments of the self-locking structure 53, refer to Figure 17The self-locking structure 53 includes a hook 531 and a slot 532. The hook 531 is disposed on one of the medium base 51 and the force application component 52, and the slot 532 is disposed on the other. In the engaging position, the hook 531 engages with the slot 532, locking the relative position between the force application component 52 and the medium base 51. In the disengaged position, the hook 531 disengages from the slot 532, unlocking the relative position between the force application component 52 and the medium base 51.

[0201] In this embodiment, the self-locking structure 53 may include a hook 531 and a slot 532 disposed between the medium and the force-applying component 52. The hook 531 and the slot 532 can lock the relative position between the force-applying component 52 and the medium base 51 through the snap-fit ​​engagement, preventing medium backflow. The snap-fit ​​structure of the hook 531 and the slot 532 is simple and easy to implement, and requires no additional action, automatically locking and making operation very convenient.

[0202] During the engagement of the hook 531 and the slot 532, the hook 531 can undergo a certain deformation or displacement to smoothly engage with the slot 532. The deformation-based design of the hook 531 is structurally simple, while the displacement-based design requires an additional deformation structure. The hook 531 itself does not deform, which can improve the strength of the component and extend its service life.

[0203] For example, to improve the service life and snap-fit ​​strength of components, refer to Figure 17 In some embodiments, the hook 531 is rotatably disposed on one of the medium base 51 and the force application component 52, and the self-locking structure 53 further includes a hook recovery member 533 for applying a force to the hook 531 toward the locking position.

[0204] The snap hook recovery component 533 gives the snap hook 531 a certain springback capability, which facilitates the automatic engagement of the snap hook 531 and the slot 532. In the absence of other obstructions, the force applied by the snap hook recovery component 533 to the snap hook 531 can keep the snap hook 531 in the slot 532, making it difficult for it to fall out and maintaining stable medium pressure.

[0205] After the transport is completed, it may be necessary to release the medium in the lifting mechanism 2 to remove the transport device from below the target object. Then, the medium can be allowed to flow back into the medium cavity 511 by unlocking the self-locking structure 53.

[0206] The snap-hook recovery component 533 can be a spring, torsion spring, or other component with elastic properties. (See reference...) Figure 17In some embodiments, the self-locking structure 53 further includes a hook unlocking member 534. One end of the hook 531 is a hook portion 5311, and the hook unlocking member 534 is connected to the other end of the hook 531. When the hook unlocking member 534 is subjected to external force, it causes the hook 531 to rotate, thereby driving the hook portion 5311 to move to the disengaged position.

[0207] Thus, when it is necessary to unlock the self-locking structure 53, by applying force to the hook unlocking part 534, the hook 531 can be rotated, causing the hook part 5311 to disengage from the slot 532, thereby facilitating unlocking.

[0208] For ease of operation, the hook unlocking component 534 is a rod-shaped structure that can extend to a considerable length for easy access by personnel. For convenient implementation, the hook 531 is mounted on the media base 51, and the slot 532 is mounted on the force-applying component. When the force-applying component is stepped on, it moves towards the media base 51. When the outer edge of the slot 532 contacts the hook 531, it compresses the hook 531. The hook 531 rotates around its hinge point with the media base 51, allowing it to smoothly engage with the slot 532.

[0209] In other embodiments of the self-locking structure 53, refer to Figure 18 The self-locking structure 53 includes a positioning pin 535 and a positioning hole 536. The positioning pin 535 is slidably disposed on one of the medium base 51 and the force application component 52, and the positioning hole 536 is disposed on the other of the medium base 51 and the force application component 52. When the positioning pin 535 slides to the positioning position, the positioning pin 535 is inserted into the positioning hole 536, and the relative position between the force application component 52 and the medium base 51 is locked. When the positioning pin 535 slides to the unlocking position, the positioning pin 535 disengages from the positioning hole 536, and the relative position between the force application component 52 and the medium base 51 is unlocked.

[0210] The self-locking structure 53 can also be achieved by using a positioning pin 535 and a positioning hole 536 to lock the relative position of the medium base 51 and the force application component 52. The structure is simple and the positioning is stable.

[0211] In the configuration of positioning hole 536 and positioning pin 535, positioning hole 536 can be located on medium base 51 and positioning pin 535 can be located on force-applying component, or positioning hole 536 can be located on force-applying component and positioning pin 535 can be located on medium base 51. The connection between positioning hole 536 and positioning pin 535 can be manually operated or automatically locked.

[0212] For example, in this embodiment, the self-locking structure 53 may include a positioning pin recovery member 538. The component of the medium base 51 and the force application component 52 that provides the positioning pin 535 has a self-locking hole 537. The positioning pin 535 is disposed in the self-locking hole 537. The positioning pin recovery member 538 is located in the self-locking hole 537 and abuts against the positioning pin 535. The positioning pin recovery member 538 is used to apply a force to the positioning pin 535 to move it to the positioning position.

[0213] The positioning pin 535 can move within the self-locking hole 537. When subjected to external force, the positioning pin 535 can move into the self-locking hole 537, facilitating insertion into the positioning hole 536. The positioning return member applies a force to the positioning pin 535 toward the positioning hole 536, causing at least a portion of the positioning pin 535 to extend into and remain within the positioning hole 536, preventing it from dislodging. The automatic locking function is achieved through the force of the positioning pin return member 538.

[0214] Similarly, to facilitate unlocking, this embodiment also includes a structure that facilitates unlocking. Specifically, refer to... Figure 18 The self-locking structure 53 may include a positioning pin unlocking member 539, which is disposed in the positioning hole 536 and can move along the positioning hole 536 toward the positioning pin 535 to push the positioning pin 535 out of the positioning hole 536.

[0215] By using the positioning pin unlocking member 539, which can move along the positioning hole 536 toward the positioning pin 535, the positioning pin 535 can be pushed away from the positioning hole 536 toward the self-locking hole 537 until it disengages from the positioning hole 536, thus unlocking.

[0216] The shape and structure of the positioning pin unlocking component 539 can be customized according to actual needs. For example, the first end of the positioning pin unlocking component 539 can be inserted into the positioning hole 536, and the second end is located outside the positioning hole 536, forming a large flange to create a disc-shaped handle for easy manual or foot operation. A limiting step can also be provided inside the positioning hole 536, and the positioning pin unlocking component 539 is correspondingly provided with a limiting protrusion. When the positioning pin unlocking component 539 moves toward the positioning pin 535 to the preset unlocking position, the limiting protrusion abuts against the limiting step, preventing the positioning pin unlocking component 539 from continuing to move.

[0217] In the first embodiment of power source 5, after the force-applying component of power source 5 is stepped on, the medium in medium chamber 511 can be input into pressure chamber 211 of lifting mechanism 2. A check valve can be set in the medium input passage or at the output end of power source 5, allowing for multiple stepping inputs. Of course, power source 5 can also achieve the lifting action with a single stepping action. For example, if the medium volume of medium chamber 511 is greater than or equal to the required medium volume, then only one stepping action is needed to provide sufficient medium. Generally, the medium volume of medium chamber 511 can be set to be equal to the required medium volume.

[0218] The medium can be either a gas or a liquid. The medium cavity 511 can be pre-filled with the medium and sealed from the outside. Thus, the medium within the medium cavity 511 is pre-set and will not be affected by external interference. For example, refer to... Figure 16 The medium base 51 is provided with a medium injection port 513, and the power source 5 also includes a sealing plug 514 adapted to the medium injection port 513. The medium injection port 513 communicates with the medium cavity 511, and the sealing plug 514 is used to seal the medium injection port 513. When the volume of the medium cavity 511 reaches a predetermined size, the interior is filled with a preset medium. At this time, the sealing plug 514 can be used to seal the medium injection port 513. During subsequent handling and carrying, it is not necessary to remove the sealing plug 514, and the medium inside the medium cavity 511 will not be affected by the external environment.

[0219] Example 2 of Power Source 5:

[0220] In some embodiments of this application, reference is made to Figure 19 , Figure 20 , Figure 21 The power source 5 includes a pump 54 and a reversing valve 55. The pump 54 is connected to the piston lifting assembly 21 through the reversing valve 55. When the reversing valve 22 is in the first state, the outlet of the pump 54 is connected to the piston lifting assembly 21. When the reversing valve 55 is in the second state, the outlet of the pump 54 is disconnected from the piston lifting assembly 21.

[0221] In this embodiment, the power source 5 can be a pump 54 to provide power. Furthermore, to facilitate pressure holding, pressure release, and other controls, a reversing valve 55 is also included. The reversing valve 55 can switch the connection state between the pump 54 and the piston lifting assembly 21. The connection state can include opening, closing, switching the medium flow direction, switching branches, etc. This reduces the number of mechanisms in the handling device and allows for more intelligent control operations.

[0222] Specifically, refer to Figure 20 and Figure 21To achieve reversing, the reversing valve 55 includes a valve body 551, a reversing plunger 552, and a reversing power component 553. The valve body 551 has a reversing chamber 5511. The valve body 551 is also provided with a pump inlet 5512, a pump outlet 5513, a medium inlet 5514, and a medium outlet 5515 that communicate with the reversing chamber 5511. The pump inlet 5512 and the pump outlet 5513 are respectively connected to the output and input of the pump 54. The medium inlet 5514 is connected to the medium. The medium outlet 5515 is connected to the pressure chamber 211. The reversing plunger 552 can slide in a sealed manner in the reversing chamber 5511. The reversing power component 553 can drive the reversing plunger 552 to move between a first position and a second position in the reversing chamber 5511.

[0223] In the first position, the reversing plunger 552 connects the pump inlet 5512 with the medium inlet 5514 and the pump outlet 5513 with the medium outlet 5515.

[0224] In the second position, the reversing plunger 552 connects the pump inlet 5512 to the medium outlet 5515, and the pump outlet 5513 to the medium inlet 5514.

[0225] In this way, the reversing power component 553 provides power, which can drive the reversing plunger 552 inside the valve body 551 to move in the reversing chamber 5511. When the reversing plunger 552 is in different positions, the connection combination between the four openings of pump inlet 5512, pump outlet 5513, medium inlet 5514, and medium outlet 5515 can be switched, making the control operation very convenient and quick.

[0226] The instruction manual indicates that the commutation power component 553 can be a linear motor, cylinder, threaded pump, or other structure that can be flexibly driven and controlled by electrical energy and signals.

[0227] To facilitate the switching plunger 552 opening different passages at different positions, the positional relationship between the ports can be arranged on the valve body 551 along the movement direction of the switching plunger 552, adapting to the structure of the plunger. For example, see [reference needed]. Figure 20 and Figure 21 In some embodiments of this invention, along the extension direction of the reversing plunger 552, the pump inlet 5512, the medium inlet 5514, the pump outlet 5513, and the medium outlet 5515 on the valve body 551 are arranged in sequence at intervals. The reversing plunger 552 is provided with a first connecting part 5522 and a second connecting part 5523 that are not interconnected along the same direction. The reversing plunger 552 also has a return hole 5521 inside. One end of the return hole 5521 is located at the end of the reversing plunger 552, and the other end is located in the first connecting part 5522.

[0228] Reference Figure 20In the first position, the reversing plunger 552 moves into the reversing cavity 5511, the first connecting part 5522 connects the pump inlet 5512 with the medium inlet 5514, and the second connecting part 5523 connects the pump outlet 5513 with the medium outlet 5515.

[0229] Reference Figure 21 In the second position, the reversing plunger 552 moves to the outside of the reversing cavity 5511, and the return hole 5521 and the first connecting part 5522 connect the pump inlet 5512 and the medium outlet 5515, and the second connecting part 5523 connects the pump outlet 5513 and the medium inlet 5514.

[0230] Since the pump inlet 5512, medium inlet 5514, pump outlet 5513, and medium outlet 5515 on the valve body 551 are arranged at intervals, and the reversing plunger 552 is also provided with different channels along the first direction a, namely the first connecting part 5522, the second connecting part 5523, and the return hole 5521, when the reversing plunger 552 moves to different positions along the first direction a, the first connecting part 5522, the second connecting part 5523, and the return hole 5521 also change positions, thereby changing the corresponding connection relationship with the pump inlet 5512, medium inlet 5514, pump outlet 5513, and medium outlet 5515, ultimately realizing the function of switching the medium flow direction.

[0231] To facilitate equipment assembly and connection of transmission pipeline 4, refer to Figure 19 , Figure 20 , Figure 21 Pump inlet 5512 and pump outlet 5513 are located on the same side of valve body 551, and medium inlet 5514 and medium outlet 5515 are located on the other side of valve body 551. The first connecting part 5522 and the second connecting part 5523 are both formed with annular recesses on the outer wall of the reversing plunger 552.

[0232] Since the pump inlet 5512 and the pump outlet 5513 are located on the same side of the valve body 551, that is, the interfaces that connect to the output and inlet of the pump 54 are on the same side, it is convenient for layout and connection; and since the medium inlet 5514 and the medium outlet 5515 are located on the other side of the valve body 551, that is, the interfaces that connect to the lifting mechanism 2 are on the other side, it is convenient for layout.

[0233] Therefore, to facilitate the alignment and communication between the reversing plunger 552 and the corresponding interface when it moves along the first direction a, both the first connecting portion 5522 and the second connecting portion 5523 are formed with annular recesses on the outer wall of the reversing plunger 552. The annular recesses can be conveniently located for communication between interfaces on different sides.

[0234] In the embodiments of the conveying device of this application, during the process of inputting the medium into the pressure chamber 211, the pressure may be too low or too high. If the pressure is too low, it will not be enough to support the target object or achieve the lifting action, while if the pressure is too high, it may damage the pipeline or components. Therefore, it is more appropriate to maintain the medium pressure in the medium supply passage within an appropriate range.

[0235] To achieve the above effect, refer to Figure 22 , Figure 23 , Figure 24 In some embodiments of the conveying device, the conveying device further includes a pressure holding mechanism 6. The pressure holding mechanism 6 includes a pressure holding shell 61, a valve core 62, and a pressure holding recovery component 63. A pressure holding cavity 64 is formed inside the pressure holding shell 61. The pressure holding shell 61 is provided with a passage inlet 611, a passage outlet 612, and a pressure relief port 613 that communicate with the pressure holding cavity 64. The passage inlet 611 is connected to an external power source, and the passage outlet 612 is connected to the piston lifting assembly 21. The valve core 62 is disposed in the pressure holding cavity 64 and is close to the pressure relief port 613, and is movably connected to the pressure holding shell 61. The pressure relief port 613 is connected to the outside. When the valve core 62 is in the first position, the valve core 62 blocks the pressure relief port 613. When the valve core 62 is in the second position, the valve core 62 opens the pressure relief port 613.

[0236] The pressure-holding recovery component 63 is disposed between the valve core 62 and the pressure-holding housing 61, and the pressure-holding recovery component 63 has a tendency to position the valve core 62 in a first position.

[0237] Furthermore, the pressure-recovery component 63 is configured in conjunction with the valve core component 62, which can apply a continuous thrust to the valve core component 62 to block the connection between the pressure relief port 613 and the passage inlet 611 and passage outlet 612.

[0238] The pressure-holding mechanism 6 is connected to the medium supply passage of the pressure chamber 211. It can block or open the pressure relief port by having the valve core 62 in the first or second position.

[0239] Of course, the pressure holding mechanism 6 can also be configured to connect the medium supply passage to the outside only when the medium pressure value passing through it is greater than or equal to the first threshold.

[0240] Because a pressure-holding mechanism 6 is installed in the medium supply passage, and the pressure-holding mechanism 6 has an initial setting of a first threshold, when the pressure value of the medium is less than the first threshold, the pressure-holding mechanism 6 does not work, keeping the medium supply passage unobstructed, allowing the medium to continue to be input and increasing the pressure value; when the pressure value of the medium is greater than or equal to the first threshold, the pressure-holding mechanism 6 works, connecting the medium supply passage to the outside, which can release the pressure of the medium, so that the entire medium supply passage is within a safe pressure value range.

[0241] The pressure-holding mechanism 6 can be used to maintain pressure and detect the pressure value of the medium. In addition, the pressure-holding mechanism 6 can be used in a scheme where the power source 5 of the conveying device is detachable from the connecting frame 1. If it is necessary to disassemble the conveying device, the power source 5 can be directly disassembled to completely release the medium.

[0242] The first threshold for pressure holding can be achieved by the pressure holding recovery component 63. Specifically, when the pressure value of the medium passing through the pressure holding chamber 64 is greater than or equal to the first threshold, the valve core component 62 can overcome the thrust of the pressure holding recovery component 63 and connect the pressure relief port 613 with the passage inlet 611 and the passage outlet 612.

[0243] By applying a continuous thrust to the valve core 62 through the pressure-holding and recovery component 63, when the medium pressure value passing through the pressure-holding chamber 64 is greater than or equal to a first threshold, the valve core 62 can overcome the thrust of the pressure-holding and recovery component 63, thereby achieving pressure relief. When the medium pressure value passing through the pressure-holding chamber 64 is less than the first threshold, the valve core 62 will be pushed back by the thrust of the pressure-holding and recovery component 63, blocking the pressure relief port 613 from the passage inlet 611 and passage outlet 612, and no more pressure relief will occur. Thus, the pressure value in the medium supply passage can be automatically adjusted within a set range.

[0244] The pressure-holding and recovery component 63 can be a spring.

[0245] In addition, the pressure-holding mechanism 6 also serves to monitor the pressure within the media supply pipeline in real time. Of course, a separate pressure detection unit can also be installed within the media supply pipeline itself, or the pressure detection unit can be integrated into the pressure-holding mechanism 6.

[0246] To minimize the impact on the medium supply path, refer to Figure 23 , Figure 24 In some embodiments, the passage inlet 611 and passage outlet 612 are arranged opposite to each other and extend along the same axis. The valve core 62 can move in a direction perpendicular to the extension direction of the passage inlet 611 to open or block the communication between the pressure relief port 613 and the passage inlet 611 and the passage outlet 612.

[0247] Since the passage inlet 611 and passage outlet 612 extend along the same axis and are positioned opposite each other, they can directly connect to the flowing medium without depressurization, ensuring smooth medium flow. Furthermore, the movement direction of the valve core 62 is perpendicular to the extension direction of the passage inlet 611, thus not interfering with the passage flow space and facilitating layout and implementation.

[0248] The pressure-holding mechanism 6 needs to withstand a large medium pressure. To facilitate assembly and implementation, the pressure-holding housing 61 can be assembled from multiple structures. For example, refer to... Figure 24In some embodiments of the pressure holding mechanism 6, the pressure holding housing 61 includes a pressure holding seat 614, a sealing seat 615, and a pressure holding cover 616. A passage inlet 611 and a passage outlet 612 are disposed on the pressure holding seat 614. The sealing seat 615 covers the pressure holding seat 614 and has a valve port in the middle. The pressure holding cover 616 covers the sealing seat 615. A pressure relief port 613 is disposed on the pressure holding cover 616. The upper end of the valve core 62 is clearance-fitted with the pressure relief port 613, and the lower end is sealed-fitted with the valve port. The pressure holding recovery component 63 is disposed inside the pressure holding cover 616, and its two ends abut against the pressure holding cover 616 and the valve core 62, respectively.

[0249] When the pressure of the medium passing through the pressure chamber 64 is greater than or equal to the first threshold, the valve core 62 moves toward the pressure cover 616 to open the valve port.

[0250] Here, the pressure-holding housing 61 may include a pressure-holding seat 614, a sealing seat 615, and a pressure-holding cover 616. After the three are assembled, they can form the basic structure of the pressure-holding housing 61, which is convenient for production and assembly, and has a simple structure, realizing the assembly of the pressure relief space and the valve core 62.

[0251] It should be noted that the pressure release of the pressure holding mechanism 6 is automatic based on the pressure within the medium supply passage. It's possible that the operator might not notice the pressure release and continue pressurizing, resulting in wasted resources and effort. Therefore, in the pressure holding mechanism 6 of this application, a buzzer structure can be added to the pressure release path of the pressure holding mechanism 6. This allows a sound to be emitted when the medium is depressurized at this point, thus reminding the operator to stop pressurizing. For example, the valve core 62 and the pressure relief port 613 can be clearance-fitted. By setting the gap between the valve core and the pressure relief port 613, a sound can be emitted when the gas medium passes through. Alternatively, a whistle component can be installed at the pressure relief port 613.

[0252] The pressure-holding mechanism 6 in the above embodiment automatically releases pressure. In the embodiments of the conveying device of this application, active pressure release is also possible. For example, see... Figure 25 , Figure 26 , Figure 27 In some embodiments, the conveying device further includes a pressure relief mechanism 7, which is connected to the medium supply passage of the piston lifting assembly 21. The pressure relief device includes a pressure relief shell 71, a pressure relief component 72, and a pressure relief recovery component 74. A pressure relief receiving cavity 73 is formed inside the pressure relief shell 71. The pressure relief receiving cavity 73 includes a flow cavity 731 and a pressure relief cavity 732. The flow cavity 731 is connected to the medium supply passage, and the pressure relief cavity 732 is connected to the outside. The pressure relief component 72 is provided with a pressure relief port 721. The pressure relief component 72 can be moved along the inner wall of the pressure relief receiving cavity 73 to the pressure relief position and the pressure holding position when subjected to force.

[0253] In the pressure relief position, the pressure relief port 721 connects the flow chamber 731 and the pressure relief chamber 732; in the pressure holding position, the pressure relief port 721 is blocked from the flow chamber 731.

[0254] The pressure relief recovery component 74 is connected to the pressure relief component 72, and the pressure relief recovery component 74 has a tendency to move the pressure relief component 72 from the pressure relief position to the pressure holding position. Due to the provision of the pressure relief mechanism 7, the pressure of the medium in the medium supply passage can be actively released by operating the pressure relief component 72 to move along the inner wall of the pressure relief receiving cavity 73, thereby connecting or blocking the flow cavity 731 and the pressure relief cavity 732.

[0255] In addition, the pressure relief mechanism 7 can be used in a scheme where the power source 5 of the conveying device cannot be disassembled from the connecting frame 1. By operating the pressure relief component 72 of the pressure relief mechanism 7 to move its position, the medium can be completely released without damaging the medium supply passage, such as by disconnecting the corresponding pipeline. Only manual operation of the pressure relief component 72 is required.

[0256] Reference Figure 25 , Figure 26 , Figure 27 The example illustrates an implementation of a pressure relief housing 71 of a pressure relief mechanism 7. The pressure relief housing 71 is provided with a pressure relief mounting port 711. One end of the pressure relief component 72 is slidably connected to the pressure relief mounting port 711. The pressure relief component 72 can move along the inner wall of the pressure relief receiving cavity 73 to the pressure relief position and the pressure holding position.

[0257] In the pressure relief position, the pressure relief component 72 is located inside the receiving cavity, and the pressure relief port 721 connects the flow cavity 731 and the pressure relief cavity 732; in the pressure holding position, one end of the pressure relief component 72 passes through the pressure relief installation port 711, and the pressure relief port 721 is blocked from the flow cavity 731.

[0258] With this design, one end of the pressure relief component 72 can move through the pressure relief mounting port 711. When manual pressure relief is required, the pressure relief component 72 can be easily operated to move its position, thereby connecting the flow cavity 731 and the pressure relief cavity 732 through the pressure relief port 721. External force can be easily applied to the pressure relief component 72 to operate its movement position.

[0259] Upon completion of pressure release, the pressure release component 72 needs to be returned to the pressure holding position. This action can be performed manually or automatically by means of a flexible structure. When pressure release is required, the pressure release component 72 can be moved from the pressure holding position to the pressure release position by pressing or stepping on it. After pressure release is completed, the external force is removed, and the force applied to the pressure release component 72 by the pressure release recovery component 74 causes the pressure release component 72 to move from the pressure release position to the pressure holding position, thus automatically returning to the pressure holding position. This makes the operation simpler and easier.

[0260] The pressure relief and recovery component 74 can be a spring.

[0261] In the handling device of this application, after the medium is depressurized after handling, there may be residual medium in the medium supply passage, which may lead to incomplete retraction of the lifting mechanism 2, making it difficult to store and carry. Therefore, in order to solve this problem, refer to Figure 28 , Figure 29 In some embodiments of the conveying device of this application, the conveying device may further include a recycling mechanism 8. The recycling mechanism 8 includes a recycling shell 81, a recycling piston 82, and a recycling recovery member 84. A recycling cavity 83 is formed inside the recycling shell 81. A recycling port 811 is provided on the recycling shell 81. The recycling port 811 is used to connect the recycling cavity 83 and the medium supply passage. When the recycling piston 82 slides along the inner wall of the recycling cavity 83, the recycling cavity 83 generates a negative pressure to recycle the medium in the medium supply passage. The volume of the recycling cavity 83 is equal to or greater than the volume in the medium supply passage.

[0262] The recovery and restoration component 84 is located between the recovery piston 82 and the recovery chamber 83, and has a tendency to move the recovery piston 82 toward the recovery port 811.

[0263] Furthermore, when the transport device needs to depressurize, the recovery chamber 83 in the recovery mechanism 8 can generate negative pressure, and the medium remaining in the medium supply passage can be recovered into the recovery chamber 83, realizing the medium recovery function, solving the problem of poor medium recovery or medium residue, and thus facilitating the storage and carrying of the transport device.

[0264] The recycling chamber 83 within the recycling mechanism 8 can recycle a portion of the medium at a time, or it can recycle all of the medium at a time. In some embodiments, the volume of the recycling chamber 83 is equal to or greater than the volume within the medium supply passage.

[0265] In this way, on the one hand, all media can be recovered in the recovery chamber 83 to achieve complete recovery; on the other hand, a single stroke in the recovery chamber 83 can generate sufficient negative pressure, reducing operation steps and actions, and further facilitating the recovery operation.

[0266] By allowing the recovery piston 82 to slide in a sealed manner within the recovery chamber 83, a negative pressure can be generated within the recovery chamber 83, thereby achieving the function of media recovery.

[0267] The movement of the recovery piston 82 can be driven by an external force or other power source. The process of generating negative pressure and the process of returning to the initial state are two opposite strokes, both of which can be driven by an external force or other power source. The external force can be manually operated or a recoverable force can be set to achieve automatic recovery. Furthermore, the recovery mechanism 8 should be in its initial state before the recovery medium is received, allowing for the generation of sufficient negative pressure space.

[0268] Because of the inclusion of the recovery and restoration component 84, the recovery mechanism 8 can remain in its initial state within the recovery medium chamber 511, providing sufficient negative pressure space. Furthermore, the process of the recovery piston 82 returning to its initial state can also be accomplished by the recovery and restoration component 84. That is, when the external force acting on the recovery piston 82 is removed, the restoring force of the recovery and restoration component 84 can automatically move the recovery piston 82 toward the recovery port 811, returning the recovery piston 82 to its initial state.

[0269] The recycled component 84 can be a spring or other elastic part.

[0270] For ease of operation, refer to Figure 29 In some embodiments of the recycling mechanism 8, the axial direction of the recycling chamber 83 extends vertically, and the recycling piston 82 can slide vertically within the recycling chamber 83. The upper part of the recycling housing 81 has a recycling operation port 812, and the upper end of the recycling piston 82 is fitted into the recycling operation port 812. The recycling port 811 is located near the upper part of the recycling chamber 83. When the upper end of the recycling piston 82 is subjected to external force, the recycling piston 82 moves downward to generate negative pressure within the recycling chamber 83.

[0271] In this way, when recycling is needed, personnel only need to press or step on it, and the recycling piston 82 will move downward under the external force in the vertical direction, so as to generate negative pressure in the recycling chamber 83, thereby realizing the recycling of the medium.

[0272] Reference Figure 28 , Figure 29 In this embodiment, the recycling mechanism 8 has a disc-shaped outer shell 81, formed by a sealed connection of two upper and lower components. The entire recycling chamber 83 is similar to a disc, ensuring sufficient negative pressure space while reducing the vertical occupancy, facilitating the fixing of the recycling mechanism 8 to the support without affecting the overall height of the transport device. In this embodiment, the recycling recovery component 84 can be a spring disposed within the recycling chamber 83. The lower end of the spring abuts against the bottom surface of the recycling chamber 83, and the upper end abuts against the inside of the recycling piston 82. When the recycling piston 82 is stepped on, the spring is elastically compressed, thereby generating elastic force to return the recycling piston 82 to its initial state when no external force is applied.

[0273] In some other embodiments of the recovery mechanism 8, the recovery mechanism 8 further includes a crank-connecting rod mechanism 85, the recovery chamber 83 extends axially in the horizontal direction, the recovery piston 82 can slide horizontally in the recovery chamber 83, the recovery port 811 is provided at one end of the recovery chamber 83 in the axial direction, and the end of the recovery piston 82 away from the recovery port 811 is connected to the crank-connecting rod mechanism 85, the crank-connecting rod mechanism 85 is used to convert the force in the direction of gravity into the force of the recovery piston 82 away from the recovery port 811.

[0274] In this embodiment, the recovery piston 82 slides horizontally within the recovery chamber 83, which facilitates the setting of the recovery chamber 83. There is sufficient space in the horizontal direction to set a sufficiently long stroke, which facilitates the setting of the volume of the recovery chamber 83.

[0275] To achieve the movement of the recovery piston 82 in the horizontal recovery chamber 83, refer to Figure 30 , Figure 31 The crank-connecting rod mechanism 85 may include a crank pedal 851, a recovery connecting rod 852, and a guide seat 853. One side of the crank pedal 851 is hinged to the recovery housing 81, and the other side is connected to the first end of the recovery connecting rod 852. The second end of the recovery connecting rod 852 is hinged to the end of the recovery piston 82 away from the recovery port 811. The guide seat 853 is provided with a guide groove 8531 extending in the horizontal direction. The second end of the recovery connecting rod 852 and the end of the recovery piston 82 away from the recovery port 811 are rotatably and slidably disposed in the guide groove 8531.

[0276] Thus, under the force of gravity on the crank pedal 851, the angle between the crank pedal 851 and the recovery linkage 852 gradually increases, and the second end of the recovery linkage 852 drives the end of the recovery piston 82 away from the recovery port 811 to move along the guide groove 8531, and the recovery piston 82 moves away from the recovery port 811.

[0277] Through the crank pedal 851 and the return linkage 852 in the crank-connecting rod mechanism 85, the force on the crank pedal 851 can be converted into the horizontal movement of the return piston 82. The crank pedal 851 can be easily pressed or stepped on to input force, making operation convenient. The guide groove 8531 on the guide seat 853 can guide the movement of the return piston 82 and prevent the movement of the return piston 82 from getting stuck.

[0278] In this embodiment, refer to Figure 31The recovery housing 81 is a shell with a cylindrical structure extending horizontally, and a plate-shaped support supporting the cylindrical structure. One side of the crank pedal 851 is hinged to the support or one side of the cylindrical structure. The recovery recovery component 84 can be a tension spring disposed outside the recovery housing 81. One end of the tension spring is fixed to one side of the cylindrical structure guide seat 853, and the other end is fixed at the hinge position between the recovery piston 82 and the guide seat 853. Thus, when the recovery piston 82 moves along the guide seat 853, the spring is stretched to produce elastic deformation, thereby generating elastic force to return the recovery piston 82 to its initial state when no external force is applied.

[0279] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A handling device, characterized in that include: Connector; Multiple lifting mechanisms are mounted on the connecting frame. One of the lifting mechanisms includes a piston lifting assembly and a roller assembly. The piston lifting assembly is telescopic in a first direction. The piston lifting assembly is mounted on the connecting frame, and its telescopic end is connected to the roller assembly. In this configuration, the piston lifting assembly is in a retracted state, and the height of the lifting mechanism is less than 30mm.

2. The handling device of claim 1, wherein When the piston lifting assembly is in the retracted state, the height of the lifting mechanism is less than 20mm.

3. The handling device of claim 1, wherein The lifting stroke of the piston lifting assembly is greater than 10mm.

4. The handling device of claim 3, wherein The lifting stroke of the piston lifting assembly is greater than 12mm.

5. The handling device of claim 1, wherein, The piston lifting assembly includes a piston cylinder and at least two piston members. Adjacent piston members are slidably and sealably connected along the first direction. The piston cylinder is connected to the connecting frame. The piston member closer to the piston cylinder is slidably and sealably connected to the piston cylinder. The piston member farther from the piston cylinder is connected to the roller assembly.

6. The handling device of claim 5, wherein, For the first and second piston members in the adjacent piston members, the first piston member has a piston hole extending along the first direction, and one end of the first piston member has a first limiting portion; the first end of the second piston member has a second limiting portion, which passes through the piston hole and is in a sealing and sliding connection with the first piston member; the second end of the second piston member has a third limiting portion, and the first limiting portion is located between the second limiting portion and the third limiting portion. When the first piston and the second piston are in a contracted state, the third limiting part abuts against the first limiting part, and the end of the first piston away from the first limiting part is flush with the first end of the second piston.

7. The handling device of claim 5, wherein The piston cylinder has a communication port on its circumferentially distributed sidewalls, which is used to connect to a power source.

8. The handling device of claim 1, wherein The roller assembly includes a roller and a roller bracket. One end of the roller bracket is rotatably connected to the piston lifting assembly. The rotation axis of the roller bracket is parallel to the first direction. The roller is rotatably connected to the other end of the roller bracket. The rotation axis of the roller is perpendicular to the first direction. The rotation axis of the roller and the rotation axis of the roller bracket are spaced apart.

9. The handling device of claim 8, wherein, The roller assembly also includes a planar bearing, and one end of the roller bracket is rotatably connected to the piston lifting assembly via the planar bearing.

10. The handling device of claim 1, wherein, The piston lifting assembly has a recessed portion at one end connected to the roller assembly, and the roller assembly is disposed within the recessed portion.

11. The handling device of claim 1, wherein, The connecting frame has a lifting mounting hole, and the lifting mechanism passes through the lifting mounting hole and is fixed on the connecting frame.

12. The handling device according to any one of claims 1 to 11, characterized in that The connecting frame includes a first support and a second support. A portion of the plurality of lifting mechanisms is disposed on the first support and another portion is disposed on the second support. The first support and the second support are movably connected. When the first support and the second support move relative to each other, they have at least a first position and a second position. In the first pose, the first support and the second support are close together; In the second pose, the first support and the second support are separated.

13. The handling device of claim 12, wherein, The middle parts of the first bracket and the middle parts of the second bracket are rotatably connected.

14. The handling device of claim 12, wherein, The connecting frame also includes a linkage mechanism, and the first bracket and the second bracket are rotatably connected to both ends of the linkage mechanism.

15. The handling device of claim 14, wherein, The first end of the linkage mechanism is rotatably connected to the first bracket, and the second end of the linkage mechanism is rotatably slidably connected to the second bracket along the extension direction of the second bracket. Alternatively, the first end of the linkage mechanism is rotatably slidably connected to the first bracket along the extension direction of the first bracket, and the second end of the linkage mechanism is rotatably slidably connected to the second bracket along the extension direction of the second bracket.

16. The handling device of claim 14, wherein, The linkage mechanism includes at least a first link and a second link, with one end of the first link and one end of the second link rotatably connected, the first bracket rotatably connected to the other end of the first link, and the second bracket rotatably connected to the other end of the second link.

17. The handling device of claim 16, wherein, The linkage mechanism comprises at least two sets, and the arrangement direction of the at least two sets of linkage mechanisms includes the extension direction of the first support.

18. The handling device of claim 17, wherein, The linkage mechanism further includes a connecting rod, the two ends of which are rotatably connected to the first connecting rod and the second connecting rod in two adjacent linkage mechanisms.

19. The handling apparatus of claim 12, wherein, The connecting frame further includes a hinge mechanism, which comprises a first hinge member and a second hinge member, wherein the middle portions of the first hinge member and the middle portions of the second hinge member are rotatably connected. In this configuration, a first end of the first hinge member is hinged to the first bracket, and a second end of the first hinge member is rotatably and slidably connected to the second bracket along the extending direction of the second bracket. Conversely, a first end of the second hinge member is hinged to the second bracket, and a second end of the second hinge member is rotatably and slidably connected to the first bracket along the extending direction of the first bracket. Alternatively, the first end of the first hinge is rotatably and slidably connected to the first bracket along the extension direction of the first bracket, the second end of the first hinge is rotatably and slidably connected to the second bracket along the extension direction of the second bracket, the first end of the second hinge is rotatably and slidably connected to the second bracket along the extension direction of the second bracket, and the second end is rotatably and slidably connected to the first bracket along the extension direction of the first bracket.

20. The handling device of claim 19, wherein, The first hinge and the second hinge have the same length and are rotatably connected at their center.

21. The handling apparatus of claim 12, wherein, When the first support and the second support move relative to each other, a third pose is also included; In the third pose, the distance between the first support and the second support is less than the distance in the second pose, but greater than the distance in the first pose.

22. The handling apparatus of claim 12, wherein, The connecting frame further includes a locking structure, which is disposed on the first support and the second support, or on the transmission path in which the first support and the second support are movably connected; in the second position, the locking structure can lock the relative positional relationship between the first support and the second support.

23. The handling apparatus of any one of claims 1-11, wherein, The conveying device also includes a power source, which is connected to the piston lifting assembly of the plurality of lifting mechanisms and is used to drive the lifting of the piston lifting assembly.

24. The handling device of claim 23, wherein, The power source includes a medium base with a medium cavity and a force-applying component. The medium cavity is connected to the piston lifting component. The force-applying component is disposed in the medium cavity and is sealed and movably connected to the medium base to drive the lifting of the piston lifting component. The power source also includes a self-locking structure disposed between the medium base and the force-applying component. When the piston lifting component is raised, the self-locking structure is used to lock the relative position between the force-applying component and the medium base.

25. The handling apparatus of claim 24, wherein, The self-locking structure includes a hook and a slot. The hook is disposed on one of the medium base and the force application component, and the slot is disposed on the other. The hook can be engaged in the slot to lock the relative position between the force application component and the medium base.

26. The handling apparatus of claim 25, wherein, The hook is rotatably disposed on one of the medium base and the force application component, and the self-locking structure further includes a hook recovery member that applies a restoring force toward the hook towards the slot.

27. The handling device of claim 26, wherein, The self-locking structure also includes a hook unlocking component. The hook includes a body part, one end of which is a hook part. The hook unlocking component is connected to the other end of the body part. When the hook unlocking component is subjected to external force, it causes the body part to rotate, thereby driving the hook part away from the slot.

28. The handling apparatus of claim 24, wherein, The self-locking structure includes a positioning pin and a positioning hole. The positioning pin is disposed on one of the medium base and the force application component, and the positioning hole is disposed on the other. The positioning pin can be inserted into the positioning hole to lock the relative position between the force application component and the medium base.

29. The handling device of claim 28, wherein, The self-locking structure further includes a self-locking base and a positioning pin recovery component. The self-locking base is fixed to one of the positioning pins in the medium base and the force application component. The self-locking base has a self-locking hole. The positioning pin and the positioning pin recovery component are fitted together in the self-locking hole. The positioning pin recovery component applies a restoring force toward the positioning pin toward the outside of the self-locking hole.

30. The handling device of claim 29, wherein, The self-locking structure also includes a positioning pin unlocking component, which is disposed in the positioning hole and can move along the positioning hole toward the positioning pin to push the positioning pin out of the positioning hole.

31. The handling apparatus of claim 23, wherein, The power source includes a pump and a reversing valve. The pump is connected to the piston lifting assembly through the reversing valve. When the reversing valve is in a first state, the pump outlet is connected to the piston lifting assembly. When the reversing valve is in a second state, the pump outlet is disconnected from the piston lifting assembly.

32. The handling apparatus of any one of claims 1-11, wherein, The conveying device further includes a pressure holding mechanism, which includes a pressure holding shell, a valve core, and a pressure holding recovery component. The pressure holding shell has a pressure holding cavity inside, and the pressure holding shell is provided with a passage inlet, a passage outlet, and a pressure relief port that communicate with the pressure holding cavity. The passage inlet is connected to an external power source, and the passage outlet is connected to the piston lifting assembly. The valve core is disposed in the pressure holding cavity and near the pressure relief port, and is movably connected to the pressure holding shell. The pressure relief port is connected to the outside. When the valve core is in the first position, the valve core blocks the pressure relief port. When the valve core is in the second position, the valve core opens the pressure relief port. The pressure-holding and restoring component is disposed between the valve core and the pressure-holding housing, and the pressure-holding and restoring component has a tendency to position the valve core in the first position.

33. The handling apparatus of any one of claims 1-11, wherein, The conveying device further includes a pressure relief mechanism, which is connected to the medium supply passage of the piston lifting assembly. The pressure relief device includes a pressure relief shell, a pressure relief component, and a pressure relief recovery component. A pressure relief receiving cavity is formed inside the pressure relief shell. The pressure relief receiving cavity includes a flow cavity and a pressure relief cavity. The flow cavity is connected to the medium supply passage, and the pressure relief cavity is connected to the outside. The pressure relief component is provided with a pressure relief port. When the pressure relief component is subjected to force, it can move along the inner wall of the pressure relief receiving cavity to the pressure relief position and the pressure holding position. In the pressure relief position, the pressure relief port connects the flow cavity and the pressure relief cavity; in the pressure holding position, the pressure relief port is isolated from the flow cavity. The pressure relief recovery component is connected to the pressure relief component, and the pressure relief recovery component has a tendency to move the pressure relief component from the pressure relief position toward the pressure holding position.

34. The handling apparatus of any one of claims 1-11, wherein, The conveying device further includes a recycling mechanism, which includes a recycling shell, a recycling piston, and a recycling recovery component. A recycling chamber is formed inside the recycling shell, and a recycling port is provided on the recycling shell. The recycling chamber is connected to the medium supply passage through the recycling port. When the recycling piston slides along the inner wall of the recycling chamber in a sealed manner, the recycling chamber generates a negative pressure to recycle the medium in the medium supply passage. The volume of the recycling chamber is equal to or greater than the volume of the medium supply passage. The recycling mechanism has a tendency to move the recycling piston toward the recycling port.

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