Carrying vehicle

Abstract

The utility model discloses a carrier. The carrier comprises a chassis, a bearing platform and a lifting mechanism. The lifting mechanism is arranged between the bearing platform and the chassis. The lifting mechanism comprises a cylinder body, a piston ring and a fluid source, the bottom of the annular cylinder body is connected with the chassis, at least part of the piston ring extends into the annular cylinder body and is in sealing fit with the annular cylinder body, so that a fluid cavity is formed between the piston ring and the annular cylinder body, and the fluid source is communicated with the fluid cavity through an overflowing hole in the bottom of the annular cylinder body; the end face of the piston ring back to the chassis is connected with the bearing platform. When the fluid source is in a pressurized state, the piston ring and the bearing platform are away from the chassis in the first direction, and when the fluid source is in a depressurized state, the piston ring and the bearing platform are close to the chassis in the first direction. By the adoption of the lifting mechanism, the structure is simple, driving is achieved between the lifting mechanism and the bearing platform in a surface contact mode, the problems of shaking and deflection are not prone to occurring, and therefore the running stability of the carrier is improved.

Description

Technical Field

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

[0002] A pallet truck is a transport vehicle used for short-distance moving of goods and is widely used in industries such as manufacturing, warehousing and logistics, medical care, and retail.

[0003] In related technologies, to enable a pallet truck to pick up and place goods, a liftable platform is installed on the truck, which is controlled by a scissor lift mechanism. However, scissor lift mechanisms are usually composed of multiple stacked cross links, making their structure relatively complex. During the movement of the pallet truck, the scissor lift mechanism is prone to swaying and tilting, which in turn affects the stability of the pallet truck's operation. Utility Model Content

[0004] This application discloses a transport vehicle to solve the problem that the lifting mechanism in the related technology is prone to shaking and tilting, resulting in poor operation stability of the transport vehicle.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application discloses a transport vehicle, which includes a chassis, a carrying platform, and a lifting mechanism;

[0007] The carrying platform is mounted on the chassis, and the lifting mechanism is located between the carrying platform and the chassis, and is connected to both the carrying platform and the chassis respectively.

[0008] The lifting mechanism includes an annular cylinder, a piston ring, and a fluid source. The bottom of the annular cylinder is connected to the chassis. At least a portion of the piston ring extends into the annular cylinder and is sealed to the annular cylinder to form a fluid cavity between the piston ring and the annular cylinder. The fluid source communicates with the fluid cavity through a flow hole at the bottom of the annular cylinder. The end face of the piston ring facing away from the chassis is connected to the bearing platform.

[0009] When the fluid source is pressurized, the piston ring and the bearing platform move away from the chassis along the first direction; when the fluid source is depressurized, the piston ring and the bearing platform move closer to the chassis along the first direction.

[0010] Wherein, the first direction is perpendicular to the surface of the chassis.

[0011] The technical solution adopted in this application can achieve the following technical effects:

[0012] The transport vehicle disclosed in this application improves upon related technologies. The lifting mechanism utilizes the sliding cooperation between the piston ring and the annular cylinder to achieve the lifting and moving of the carrying platform. Since the piston ring of the lifting mechanism and the carrying platform are driven through surface contact, it is less prone to shaking or tilting, thereby improving the stability of the transport vehicle's operation. Moreover, the lifting mechanism has a simple structure and does not require much installation space, thus reducing the height of the transport vehicle and making it applicable to a wider range of scenarios, thereby improving the flexibility of the transport vehicle's use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembly structure of the chassis, lifting mechanism, and guiding mechanism disclosed in the embodiments of this application;

[0014] Figure 2 This is a schematic diagram of the assembly structure of the chassis, bearing platform, lifting mechanism, and guiding mechanism disclosed in the embodiments of this application;

[0015] Figure 3 This is a schematic diagram of the lifting mechanism disclosed in the embodiments of this application;

[0016] Figure 4 This is one of the cross-sectional views of the lifting mechanism disclosed in the embodiments of this application;

[0017] Figure 5 This is a second cross-sectional view of the lifting mechanism disclosed in the embodiments of this application;

[0018] Figure 6 This is one of the structural schematic diagrams of the transport vehicle disclosed in the embodiments of this application;

[0019] Figure 7 This is a second schematic diagram of the transport vehicle disclosed in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100 - Chassis, 101 - First Direction, 110 - Chassis Body, 120 - First Steering Wheel, 130 - Second Steering Wheel, 140 - Third Steering Wheel, 150 - Fourth Steering Wheel, 160 - Floating Beam

[0022] 200-Bearing Platform

[0023] 300-Lifting mechanism, 310-Annular cylinder, 311-Flow passage, 312-Fluid cavity, 313-Connecting flange, 314-Second mounting hole, 320-Piston ring, 321-First end face, 322-Second end face, 323-Protrusion, 324-First mounting hole, 330-Fluid source, 340-Mounting bracket.

[0024] 400 - Guide mechanism, 410 - Sleeve, 420 - Sliding column

[0025] 500 - Housing. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0028] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0029] Please refer to Figures 1 to 7 This application discloses a transport vehicle, which may include a chassis 100, a carrying platform 200, and a lifting mechanism 300. The chassis 100 is the basic part of the transport vehicle, supporting the upper lifting mechanism 300 and the carrying platform 200, and enabling corresponding movement and steering functions. The transport vehicle can be an AGV (Automated Guided Vehicle), which refers to a transport device equipped with electromagnetic or optical automatic guidance devices, capable of traveling along a predetermined guidance path, and possessing safety protection and various transfer functions; furthermore, the transport vehicle can also perform corresponding actions remotely.

[0030] The carrying platform 200 is set on the chassis 100 and is mainly used to carry goods. To facilitate the picking, placing and moving of goods, the carrying platform 200 can be designed to be height-adjustable. Specifically, a lifting mechanism 300 can be set between the carrying platform 200 and the chassis 100. The lifting mechanism 300 is connected to both the carrying platform 200 and the chassis 100, and can realize the lifting and moving of the carrying platform 200.

[0031] like Figures 1 to 5As shown, the lifting mechanism 300 may include an annular cylinder 310, a piston ring 320, and a fluid source 330. The bottom of the annular cylinder 310 is connected to the chassis 100, and the connection method may be snap-fit, bolt connection, etc. The top of the annular cylinder 310 has an opening. It should be noted that the bottom of the annular cylinder 310 is close to the chassis 100, and the top of the annular cylinder 310 is away from the chassis 100. At least a portion of the piston ring 320 can extend into the annular cylinder 310 through the opening at the top of the annular cylinder 310. The side of the piston ring 320 is sealed to the cylinder wall of the annular cylinder 310, and the piston ring 320 and the annular cylinder 310 can slide relative to each other. A fluid cavity 312 is formed between the piston ring 320 and the annular cylinder 310. The fluid source 330 is connected to the fluid cavity 312 through the flow hole 311 at the bottom of the annular cylinder 310. The end face of the piston ring 320 facing away from the chassis 100 is connected to the bearing platform 200. The specific connection method can be snap-fit, bolt connection, etc.

[0032] The first direction 101 is defined as the surface of the chassis 100 perpendicular to the chassis 100. It should be noted that the surface of the chassis 100 is the surface of the chassis 100 facing the support platform 200. The surface of the chassis 100 can be approximated as a plane. The surface is mainly used to support the upper lifting mechanism 300 and the support platform 200. Considering that the support platform 200 will also be parallel to the surface of the chassis 100 during actual installation, the first direction 101 can also be perpendicular to the support platform 200.

[0033] The fluid source 330 is filled with fluid, which can be hydraulic oil or air. When the fluid source 330 is pressurized, the high-pressure fluid in the fluid source 330 flows into the fluid chamber 312 through the flow hole 311 at the bottom of the annular cylinder 310. Under the lifting action of the high-pressure fluid, the piston ring 320 will rise along the first direction 101 (away from the chassis 100). The side of the piston ring 320 slides against the cylinder wall of the annular cylinder 310, thereby driving the bearing platform 200 to rise along the first direction 101 as well. When the fluid source 330 is depressurized, the fluid pressure decreases, and the bearing platform 200, the piston ring 320, and the load on the bearing platform 200 descend along the first direction 101 (closer to the chassis 100) under the action of gravity. The piston ring 320 squeezes the fluid in the fluid chamber 312 back into the fluid source 330 and the fluid pipe, thereby realizing the lifting and lowering movement of the bearing platform 200 along the first direction 101. During this process, the end face of the piston ring 320 remains in contact with the bearing platform 200, resulting in good stability. It should be noted that the pump body can be used to switch the fluid source 330 between pressurized and depressurized states.

[0034] To ensure the stability of the support platform 200 during lifting, the position and diameter of the annular cylinder 310 and piston ring 320 can be selected according to the center of gravity of the support platform 200. This ensures that the center of gravity of the support platform 200 always falls within the contact area between the piston ring 320 and the support platform 200, thus preventing the support platform 200 from tilting. By setting the piston ring 320, on the one hand, the contact area between the lifting mechanism 300 and the support platform 200 can be increased, thereby improving the load-bearing capacity of the support platform 200; on the other hand, the piston ring 320 can provide a larger center of gravity adjustment area for the support platform 200. Even if the center of gravity of the support platform 200 changes due to uneven load, the contact area between the piston ring 320 and the support platform 200 can cover the center of gravity of the support platform 200 as much as possible, making the support platform 200 less prone to tilting and thus improving the stability of the support platform 200.

[0035] As described above, the transport vehicle disclosed in this application improves upon related technologies. By employing the aforementioned lifting mechanism 300, the lifting mechanism 300 and the carrying platform 200 are driven through surface contact, which reduces the likelihood of swaying or tilting, thereby improving the stability of the transport vehicle's operation. Furthermore, the lifting mechanism 300 has a simple structure and does not require much installation space, thus reducing the height of the transport vehicle and making it applicable to a wider range of scenarios, thereby enhancing the flexibility of its use.

[0036] like Figures 3 to 5 As shown, the piston ring 320 has a first end face 321 facing the chassis 100 and a second end face 322 facing away from the chassis 100. Both the first end face 321 and the second end face 322 are annular planes. The first end face 321 of the piston ring 320 is connected to the bearing platform 200. The specific connection method can be snap-fit, bolt connection, etc. The second end face 322 of the piston ring 320 extends into the annular cylinder 310.

[0037] The annular cylinder body 310 has a side surface and a bottom surface. The bottom surface of the annular cylinder body 310 is close to the chassis 100, and the side surface of the annular cylinder body 310 is curved and perpendicular to the chassis 100. To prevent the piston ring 320 from descending to a low position (close to the chassis 100) and the second end face 322 of the piston ring 320 from fitting against the bottom surface of the annular cylinder body 310, thus preventing fluid from entering the fluid chamber 312, multiple protrusions 323 can be provided on the second end face 322 of the piston ring 320. The multiple protrusions 323 extend along the piston ring 320. The second end face 322 is arranged circumferentially, and the multiple protrusions 323 together form a flow gap between the multiple protrusions 323 and the side of the annular cylinder 310. When the protrusions 323 are in contact with the bottom surface of the annular cylinder 310, the second end face 322 of the piston ring 320 is not in contact with the bottom surface of the annular cylinder 310. The flow hole 311 at the bottom of the annular cylinder 310 can communicate with the flow gap, so that the fluid can smoothly enter the fluid cavity 312 so that the lifting mechanism 300 can work normally.

[0038] To reduce the resistance when fluid enters the fluid cavity 312, a flow guiding structure can be provided on the protrusion 323. The flow guiding structure can be a flow guiding groove, a chamfered structure, etc. By providing the flow guiding structure, the fluid can enter the fluid cavity 312 more smoothly.

[0039] like Figure 3 and Figure 4 As shown, in order to improve the reliability of the connection between the piston ring 320 and the bearing platform 200, a plurality of first mounting holes 324 can be provided on the first end face 321 of the piston ring 320. The plurality of first mounting holes 324 are arranged at intervals along the circumference of the first end face 321. Correspondingly, corresponding connection holes can also be provided on the bearing platform 200. Fasteners such as bolts and clips can be used in conjunction with the plurality of first mounting holes 324 to achieve a reliable connection between the bearing platform 200 and the piston ring 320.

[0040] like Figures 3 to 5 As shown, to improve the reliability of the connection between the annular cylinder body 310 and the chassis 100, a connecting flange 313 can be provided at the bottom of the annular cylinder body 310. The connecting flange 313 is arranged around the periphery of the annular cylinder body 310. The connecting flange 313 and the annular cylinder body 310 can be an integral structure or manufactured separately and then assembled together by welding, bolting, or other methods. Multiple second mounting holes 314 are provided circumferentially at intervals on the connecting flange 313. Correspondingly, corresponding connecting holes can also be provided on the chassis 100. Bolts, clips, and other fasteners, in conjunction with the multiple second mounting holes 314, can achieve a reliable connection between the annular cylinder body 310 and the chassis 100.

[0041] In one optional embodiment of this application, such as Figure 1 and Figure 2 As shown, the transport vehicle may also include a mounting bracket 340, which is connected to the chassis 100. The connection method can be bolted, snap-fit, etc. A fluid source 330 can be connected to the mounting bracket 340 for installation. A slot can be provided on the mounting bracket 340 to embed the fluid source 330, and fasteners such as clips and bolts can be used to achieve stable assembly. Furthermore, the fluid source 330 can be a hydraulic oil source or a compressed air source, and the fluid in the fluid source 330 can be hydraulic oil or air.

[0042] like Figure 1 and Figure 2 As shown, in order to enable the carrying platform 200 to rise and fall stably in the first direction 101, a guide mechanism 400 can be provided between the chassis 100 and the carrying platform 200. The guide mechanism 400 can extend along the first direction 101 and may specifically include a telescopic rod, a lifting slide rail, etc.

[0043] In one optional embodiment of this application, the guide mechanism 400 may include a sleeve 410 and a sliding column 420. The first end of the sleeve 410 is connected to the chassis 100, specifically by bolting, welding, etc. The second end of the sleeve 410 is an open end, through which the sliding column 420 extends into the sleeve 410. The sliding column 420 and the sleeve 410 can slide relative to each other along a first direction 101. The end of the sliding column 420 facing away from the chassis 100 is connected to the support platform 200, specifically by bolting, welding, etc. When the support platform 200 rises and falls along the first direction 101, the sliding column 420 and the sleeve 410 also slide relative to each other along the first direction 101. The limiting cooperation between the sliding column 420 and the sleeve 410 can constrain the rising and falling posture of the support platform 200, making its rising and falling process more stable.

[0044] In one optional embodiment of this application, the number of guide mechanisms 400 can be multiple, such as three, four, or five. These multiple guide mechanisms 400 can be arranged at intervals along the edge of the support platform 200 to provide guidance at different positions on the support platform 200. It should be noted that the surface of the support platform 200 facing the chassis 100 has an edge, which is the aforementioned edge of the support platform 200. The shape of the edge of the support platform 200 can be rectangular, circular, elliptical, etc. For example, taking a rectangular support platform 200 as an example, guide mechanisms 400 can be provided at all four corners of the support platform 200 to achieve stable guidance.

[0045] like Figure 1 and Figure 2As shown, the chassis 100 may include a chassis body 110, a first steering wheel 120, a second steering wheel 130, a third steering wheel 140, and a fourth steering wheel 150. The first steering wheel 120 and the second steering wheel 130 are rotatably disposed at the front end of the chassis body 110, and the third steering wheel 140 and the fourth steering wheel 150 are rotatably disposed at the rear end of the chassis body 110. It should be noted that the front and rear ends of the chassis body 110 can be the two ends of the chassis body 110 along its length. The steering wheels are drive wheels, mainly used to realize the walking and steering functions of the transport vehicle. By setting four steering wheels, the flexibility of the transport vehicle can be improved. The steering wheels and the lifting mechanism 300 can be powered by batteries, which can be installed on the surface of the chassis 100.

[0046] like Figure 1 and Figure 2 As shown, a floating beam 160 is also provided on the chassis 100. The middle part of the floating beam 160 is rotatably mounted to the rear end of the chassis body 110 via a connecting shaft. The third steering wheel 140 and the fourth steering wheel 150 are rotatably mounted at opposite ends of the floating beam 160. By providing the floating beam 160, the contact state between the third steering wheel 140 and the fourth steering wheel 150 and the ground can be dynamically adjusted, enabling the transport vehicle to adapt to various complex road conditions.

[0047] like Figure 6 and Figure 7 As shown, the transport vehicle may also include a housing 500, which is mounted on top of the chassis 100. The housing 500 and chassis 100 can be assembled by snap-fit, bolt connection, etc. The housing 500 can protect the components mounted on the chassis 100. The housing 500 also has an opening, and the carrying platform 200 is disposed in the opening and fits with the edge of the opening with a clearance. In addition, the side of the housing 500 is also provided with components such as a charging interface, a control switch, indicator lights, and sensors. The charging interface is used to charge the built-in battery, the control switch is used to control the opening and closing of the transport vehicle, the indicator lights can indicate the working status of the transport vehicle, and the sensors are used to realize the movement, obstacle avoidance, and other functions of the transport vehicle.

[0048] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0049] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A transport vehicle, characterized in that, Includes chassis (100), load-bearing platform (200) and lifting mechanism (300); The carrying platform (200) is located on the chassis (100), and the lifting mechanism (300) is located between the carrying platform (200) and the chassis (100), and is connected to the carrying platform (200) and the chassis (100) respectively. The lifting mechanism (300) includes an annular cylinder (310), a piston ring (320), and a fluid source (330). The bottom of the annular cylinder (310) is connected to the chassis (100). At least a portion of the piston ring (320) extends into the annular cylinder (310) and is sealed to the annular cylinder (310) to form a fluid cavity (312) between the piston ring (320) and the annular cylinder (310). The fluid source (330) communicates with the fluid cavity (312) through a flow hole (311) at the bottom of the annular cylinder (310). The end face of the piston ring (320) facing away from the chassis (100) is connected to the bearing platform (200). When the fluid source (330) is pressurized, the piston ring (320) and the bearing platform (200) move away from the chassis (100) along the first direction (101). When the fluid source (330) is depressurized, the piston ring (320) and the bearing platform (200) move closer to the chassis (100) along the first direction (101). Wherein, the first direction (101) is perpendicular to the surface of the chassis (100).

2. The transport vehicle according to claim 1, characterized in that, The piston ring (320) has a first end face (321) facing the chassis (100) and a second end face (322) facing away from the chassis (100). The first end face (321) is connected to the support platform (200), and the second end face (322) extends into the annular cylinder (310). The second end face (322) is provided with a plurality of protrusions (323), and the plurality of protrusions (323) are arranged at intervals along the circumference of the second end face (322) and form a flow gap with the side of the annular cylinder (310); When the protrusion (323) is in contact with the bottom surface of the annular cylinder (310), the flow passage (311) is in communication with the flow gap.

3. The transport vehicle according to claim 2, characterized in that, The protrusion (323) is provided with a flow guiding structure.

4. The transport vehicle according to claim 2, characterized in that, The first end face (321) is provided with a plurality of first mounting holes (324), which are arranged at intervals along the circumference of the first end face (321). The first mounting holes (324) are configured to be connected to the support platform (200) by fasteners.

5. The transport vehicle according to claim 1, characterized in that, The bottom of the annular cylinder (310) is provided with a connecting flange (313), which is arranged around the periphery of the annular cylinder (310). The connecting flange (313) is provided with a plurality of second mounting holes (314) at circumferential intervals. The second mounting holes (314) are configured to be connected to the chassis (100) by fasteners.

6. The transport vehicle according to claim 1, characterized in that, It also includes a mounting bracket (340) connected to the chassis (100), and the fluid source (330) is connected to the mounting bracket (340).

7. The transport vehicle according to claim 1, characterized in that, The fluid source (330) is a hydraulic oil source or a compressed air source.

8. The transport vehicle according to claim 1, characterized in that, The transport vehicle also includes a guide mechanism (400), which extends along the first direction (101). The guide mechanism (400) includes a sleeve (410) and a sliding column (420). The first end of the sleeve (410) is connected to the chassis (100), and the second end of the sleeve (410) is an open end. The sliding column (420) extends into the interior of the sleeve (410) through the second end and slides relative to the sleeve (410) along the first direction (101). The end of the sliding column (420) facing away from the chassis (100) is connected to the bearing platform (200).

9. The transport vehicle according to claim 8, characterized in that, The transport vehicle includes a plurality of the guide mechanisms (400), which are arranged at intervals along the edge of the carrying platform (200).

10. The transport vehicle according to claim 1, characterized in that, The chassis (100) includes a chassis body (110) and a first steering wheel (120), a second steering wheel (130), a third steering wheel (140) and a fourth steering wheel (150). The first steering wheel (120) and the second steering wheel (130) are rotatably disposed at the front end of the chassis body (110), and the third steering wheel (140) and the fourth steering wheel (150) are rotatably disposed at the rear end of the chassis body (110).

11. The transport vehicle according to claim 10, characterized in that, The chassis (100) also includes a floating beam (160), the middle part of which is rotatably mounted to the rear end of the chassis body (110) via a connecting shaft, and the third steering wheel (140) and the fourth steering wheel (150) are rotatably disposed at opposite ends of the floating beam (160).

12. The transport vehicle according to claim 1, characterized in that, It also includes a housing (500) which is mounted on the chassis (100) and has an opening, in which the support platform (200) is located.

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