cart

Abstract

The present invention proposes a cart, wherein the cart includes: a car body; a track wheel assembly, movably arranged on the car body; at least two connecting parts, at least two connecting parts are respectively connected to the two ends of the track wheel assembly; a cylinder body, fixedly arranged on the car body; a two-way piston rod, movably arranged inside the cylinder body, the two-way piston rod divides the inside of the cylinder body into a first cavity and a second cavity, the first cavity and the second cavity can accommodate liquid, at least two connecting parts are respectively connected to the two opposite ends of the two-way piston rod; a liquid passing component, provided on the cylinder body, capable of communicating with the first cavity and the second cavity, wherein, when the liquid passing component is connected with the first cavity and the second cavity, the liquid passing component can discharge the liquid in the first cavity or the second cavity, so that the connecting part can pull the two-way piston rod to move in the cylinder body along the axial direction of the cylinder body, so that the car body can rotate relative to the track wheel assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation tools, and in particular to a cart. Background Art

[0002] In the related art, the relative position between the tracks and the body of a crawler cart is generally fixed, and the center of gravity of the entire vehicle and the relative angles between the body and the tracks, and the body and the ground cannot be adjusted in real time, which to a certain extent affects the cart's ground adaptability, especially its stability and controllability when going up and down slopes. Summary of the Invention

[0003] In order to solve at least one of the above technical problems, an object of the present invention is to provide a cart.

[0004] In view of this, according to the first purpose of the present invention, a cart proposed by the present invention includes: a car body; a track wheel assembly, movably arranged on the car body; at least two connecting parts, at least two connecting parts are respectively connected to the two ends of the track wheel assembly; a cylinder body, fixedly arranged on the car body; a two-way piston rod, movably arranged inside the cylinder body, the two-way piston rod divides the inside of the cylinder body into a first cavity and a second cavity, the first cavity and the second cavity can accommodate liquid, at least two connecting parts are respectively connected to the two opposite ends of the two-way piston rod; a liquid passing component, arranged on the cylinder body, which can be connected with the first cavity and the second cavity, wherein, when the liquid passing component is connected with the first cavity and the second cavity, the liquid passing component can discharge the liquid in the first cavity or the second cavity, so that the connecting part can pull the two-way piston rod to move in the cylinder body along the axial direction of the cylinder body, so that the car body can rotate relative to the track wheel assembly.

[0005] The cart proposed in the present invention includes a body, which serves as the main component of the entire cart and serves as the mounting base and load-bearing platform for the entire cart. Cargo can be placed on the body, and other components can be assembled onto the body to ultimately form a complete cart structure. The cart also includes a track wheel assembly, which is movably mounted on the body. Those skilled in the art will understand that the track wheel assembly includes a wheel portion, a frame portion that supports the wheel portion, and a track portion. After the track wheel assembly is installed to the body, the body is pushed, and the wheel portion and track portion of the track wheel assembly rotate accordingly, allowing the cart to move forward or backward.

[0006] The cart also includes at least two connectors, each connected to the ends of the track wheel assembly. The connectors assist in assembling and connecting the track wheel assembly to the vehicle body. The cart also includes a cylinder and a bidirectional piston rod. The cylinder and bidirectional piston rod are capable of cooperating to allow the bidirectional piston rod to slide left and right relative to the cylinder. Specifically, the cylinder is fixed to the vehicle body so that its position relative to the vehicle body remains unchanged. The bidirectional piston rod is movably disposed within the cylinder. The cylinder is a hollow cavity structure with left and right ends capable of communicating with the external environment. After the bidirectional piston rod is inserted into the cylinder, the bidirectional piston rod separates the interior of the cylinder into a first cavity and a second cavity. Specifically, the first cavity is located on the left side of the cylinder, while the second cavity is located on the right side of the cylinder. Furthermore, after the bidirectional piston rod is inserted into the cylinder, it can block the portions of the cylinder that are connected to the external environment at the left and right ends, thereby isolating the first and second cavities from the external environment.

[0007] At least two connecting members are respectively connected to the two opposite ends of the bidirectional piston rod. That is, through the at least two connecting members, the cylinder body and the bidirectional piston rod, a complete connection structure is formed between the vehicle body and the track wheel assembly, so that the two can be connected together. The first cavity and the second cavity can both contain liquid. After the first cavity and the second cavity are filled with liquid, the bidirectional piston rod is now in a state of relative force on the left and right sides due to the interaction between the liquid in the different cavities and the inner wall of the cylinder. The bidirectional piston rod cannot move relative to the cylinder body and is in a locked state, thereby preventing the vehicle body from rotating relative to the track wheel assembly, ensuring that the vehicle can travel on the road in a stable posture.

[0008] The cart also includes a liquid passage component, which is arranged on the cylinder body and can be connected to the first cavity and the second cavity. When the liquid passage component is connected to the first cavity and the second cavity, the liquid passage component can discharge the liquid in the first cavity or the second cavity.

[0009] When the cart is traveling on a flat road, the body of the cart is parallel to the ground and the center of gravity of the cart is on the center plane of the body. When it is necessary to go uphill or downhill for a long distance, the fluid flow assembly is connected to the first cavity and the second cavity, and the operator applies force to one end of the vehicle body to lift one end of the vehicle body. At the end of the vehicle body that is lifted, the distance between the connection point of the track wheel assembly and the connecting member relative to the vehicle body and the cylinder body becomes larger and larger, and the connecting member generates a force to pull the two-way piston rod to move, so that the two-way piston rod has a tendency to move toward the end of the vehicle body that is lifted and applies force to the liquid. At this time, if the cavity close to the end of the vehicle body that is lifted is the first cavity, the liquid in the first cavity will be squeezed out of the first cavity under the action of the force transmitted by the two-way piston rod because the first cavity is connected to the fluid flow assembly at this time, and the connecting member pulls the two-way piston rod to slide to the side of the vehicle body that is lifted, and the vehicle body can rotate smoothly relative to the track wheel assembly. When the vehicle body and the track wheel assembly reach the target angle, the fluid flow assembly is closed. At this time, the two-way piston rod is in a locked state, and the angle formed by adjustment between the vehicle body and the track wheel assembly is fixed.

[0010] After the angle of the cart body relative to the track wheel assembly is adjusted, the center of gravity of the cart is also adjusted, and the body can remain horizontal when climbing a slope, which not only improves the stability of the cart when climbing uphill, but also reduces the operating difficulty for the operator.

[0011] Therefore, the cart proposed by the present invention connects the track wheel assembly to the vehicle body through at least two connecting parts, a bidirectional piston rod and a cylinder body. When the cart is driving normally, the movement of the bidirectional piston rod relative to the cylinder body can be limited by the force generated by the relative contact between the liquid in the first cavity and the second cavity and the inner wall of the cylinder and the bidirectional piston rod, so that the entire cylinder body and the bidirectional piston rod act as a locking device, ensuring that the vehicle body cannot rotate relative to the track wheel assembly, so that the cart can drive normally. When it is necessary to adjust the angle of the vehicle body relative to the track wheel assembly, the liquid in the first cavity or the second cavity is discharged accordingly through the communication between the liquid passage component and the first cavity and the second cavity, so that the connecting part can pull the bidirectional piston rod to move, so that the track wheel assembly and the vehicle body are movably connected, and the vehicle body can rotate relative to the track wheel assembly. The angle of the vehicle body relative to the ground can be adjusted in real time, and the adjustment process is convenient, ensuring that the cart can travel stably under various complex road conditions.

[0012] In addition, the cart in the above embodiment provided by the present invention may also have the following additional technical features:

[0013] In the above technical solution, when the fluid flow assembly is disconnected from the first cavity and the second cavity, the liquid in the first cavity and the second cavity locks the bidirectional piston rod in the cylinder to limit the rotation of the vehicle body relative to the track wheel assembly.

[0014] In this technical solution, when the liquid-passing assembly is disconnected from the first cavity and the second cavity, the liquid in the first cavity and the second cavity locks the bidirectional piston rod to the cylinder body. Specifically, after the first cavity and the second cavity are filled with liquid, if the liquid-passing assembly is not connected to the first cavity and the second cavity, the bidirectional piston rod is in a state of force balance on the left and right sides due to the interaction between the liquid in different cavities and the inner wall of the cylinder body. The bidirectional piston rod cannot move relative to the cylinder body and is in a locked state, thereby preventing the vehicle body from rotating relative to the track wheel assembly, ensuring that the cart can travel on the road.

[0015] In any of the above technical solutions, the liquid flow assembly includes: a liquid flow tube, which is arranged on the cylinder body, one end of the liquid flow tube is connected to the first cavity, and the other end is connected to the second cavity; a control valve, which is arranged on the liquid flow tube and is used to control the opening and closing of the liquid flow tube, wherein, when the control valve is opened, the liquid in the first cavity can be transferred to the second cavity through the liquid flow tube, or the liquid in the second cavity can be transferred to the first cavity through the liquid flow tube.

[0016] In this technical solution, the liquid passage assembly includes a liquid passage pipe, which is arranged on the cylinder body and has a space for liquid to flow in. One end of the liquid passage pipe is connected to the first cavity, and the other end is connected to the second cavity.

[0017] The liquid passage assembly also includes a control valve, and the control valve is provided on the liquid passage pipe for controlling the opening and closing of the liquid passage pipe. When the control valve is open, the liquid passage pipe is correspondingly connected to the first cavity and the second cavity, and the liquid in the first cavity can be transferred to the second cavity through the liquid passage pipe, or the liquid in the second cavity can be transferred to the first cavity through the liquid passage pipe. Specifically, when the control valve is closed, the liquid passage pipe is not connected to the first cavity and the second cavity. After the first cavity and the second cavity are filled with liquid, the liquid does not have a corresponding channel to be discharged from the first cavity or the second cavity when subjected to force. At this time, the bidirectional piston rod is in a state of force balance on the left and right sides due to the interaction between the liquid in different cavities and the inner wall of the cylinder. The bidirectional piston rod cannot move relative to the cylinder body and is in a locked state, thereby preventing the vehicle body from rotating relative to the track wheel assembly, ensuring that the cart can travel on the road.

[0018] When it is necessary to go uphill or downhill for a long distance, the control valve is opened to connect the liquid pipe with the first cavity and the second cavity. The operator applies force to one end of the vehicle body to lift one end of the vehicle body. At the end of the vehicle body subjected to the lifting force, the connection point between the track wheel assembly and the connecting member is increasingly farther away from the vehicle body and the cylinder body. The connecting member generates a force to pull the bidirectional piston rod to move, causing the bidirectional piston rod to have a tendency to move toward the end of the vehicle body subjected to the lifting force. At this time, if the cavity close to the end of the vehicle body subjected to the lifting force is the first cavity, the liquid in the first cavity is connected to the liquid pipe because the first cavity is now under the action of the force transmitted by the bidirectional piston rod. The liquid will be squeezed out of the first cavity, and the volume of the first cavity will decrease. The liquid originally in the first cavity will enter the second cavity through the liquid pipe, causing the connecting piece to pull the two-way piston rod to slide toward the side of the vehicle body that is subject to the lifting force, and the vehicle body can smoothly rotate relative to the track wheel assembly. When the vehicle body and the track wheel assembly reach the target angle, the control valve is closed again. At this time, because the liquid originally in the first cavity has entered the second cavity through the liquid pipe, even if the two-way piston rod moves to one end in the cylinder body, causing the volume of the second cavity to increase, there will still be sufficient liquid to replenish the second cavity, and the first cavity and the second cavity will always be filled with liquid. This two-way piston rod is in a state of force balance on the left and right sides due to the interaction between the liquid in different cavities and the inner wall of the cylinder body. The two-way piston rod cannot move relative to the cylinder body and is in a locked state, fixing the angle formed by adjustment between the vehicle body and the track wheel assembly.

[0019] By connecting the liquid passage to both the first and second cavities, when the volume of one cavity decreases and liquid is discharged, the liquid can be correspondingly replenished into the other cavity with a larger volume, thus achieving a closed loop of liquid flow. This eliminates the need for additional external components to connect to the cylinder to replenish the other cavity, improving operational convenience and reducing structural complexity. Both the first and second cavities can be kept fully liquid-filled at all times via the liquid passage and control valve, thereby applying force to both the left and right sides of the bidirectional piston rod, thereby limiting its movement.

[0020] In any of the above technical solutions, the control valve includes: a solenoid valve, which is arranged on the liquid pipe; a hydraulic valve, which is arranged in series with the solenoid valve on the liquid pipe, and the solenoid valve and the hydraulic valve jointly control the opening and closing of the liquid pipe.

[0021] In this technical solution, the control valve includes two valves, a solenoid valve and a hydraulic valve. Specifically, the solenoid valve is arranged on the liquid pipe, and the hydraulic valve and the solenoid valve are arranged in series on the liquid pipe. The solenoid valve and the hydraulic valve jointly control the on and off of the liquid pipe. Specifically, when the vehicle is driving, the solenoid valve and the hydraulic valve are both in a closed state, the liquid pipe is not connected to the first cavity and the second cavity, and the bidirectional piston rod is locked in the cylinder body.

[0022] When long-distance uphill or downhill travel is required, the angle of the vehicle body relative to the track wheel assembly needs to be adjusted, and the center of gravity of the cart needs to be adjusted. The solenoid valve is opened, and the hydraulic valve is opened to the oil-flowing state. The liquid pipe is connected to the first cavity and the second cavity. When the force of the bidirectional piston rod is applied, the liquid in the first cavity or the second cavity can be squeezed and discharged through the liquid pipe accordingly, and the bidirectional piston rod can move left and right. The use of two valve bodies, the solenoid valve and the hydraulic valve, improves the control accuracy.

[0023] In any of the above technical solutions, a first opening is provided on the cylinder body, which is connected to the first cavity; and a second opening is connected to the second cavity, and the bidirectional piston rod includes: a piston, which is movably arranged inside the cylinder body, one side of the piston and the inner wall of the cylinder body enclose a first cavity, and the other side of the piston and the inner wall of the cylinder body enclose a second cavity; a first rod body, which is connected to one side of the piston, part of the first rod body is located in the first cavity, and the other part of the first rod body is passed through the first opening and is located outside the first cavity, and at least one connecting member is connected to the first rod body; a second rod body, which is connected to the other side of the piston, part of the second rod body is located in the second cavity, and the other part of the second rod body is passed through the second opening and is located outside the second cavity, and at least one connecting member is connected to the second rod body.

[0024] In this technical solution, the cylinder body is provided with a first opening, which is connected to the first cavity. The cylinder body is also provided with a second opening, which is connected to the second cavity. The first opening and the second opening connect the cylinder body to the external environment.

[0025] The bidirectional piston rod comprises a piston, a first rod body, and a second rod body. The piston is movably disposed within the cylinder body. Specifically, the diameter of the piston is the same as the diameter of the internal cavity of the cylinder body, so that all four sides of the piston abut against the inner wall of the cylinder body. The piston serves to divide the internal space of the cylinder body. Specifically, one side of the piston and the inner wall of the cylinder body enclose a first cavity, while the other side of the piston and the inner wall of the cylinder body enclose a second cavity. Specifically, when the piston is within the cylinder body, the first cavity, the piston, and the second cavity are located from the left end to the right end of the cylinder body.

[0026] A first rod is connected to one side of the piston, with a portion of the first rod located within the first cavity, another portion of the first rod extending through the first opening and positioned outside the first cavity, and at least one connector connected to the first rod. A second rod is connected to the other side of the piston, with a portion of the second rod located within the second cavity, another portion of the second rod extending through the second opening and positioned outside the second cavity, and at least one connector connected to the second rod. The first and second rods are connected to the connector, and the diameters of the first and second rods are the same as the apertures of the first and second openings, such that when portions of the first and second rods extend through the first and second openings, the first and second rods can securely abut against the inner walls of the first and second openings, forming a complete seal between the first and second cavities. Thus, when the first and second cavities are filled with liquid, the fluid passage assembly can be disconnected from the first and second cavities. At this time, whether it is the first rod or the second rod, it is subjected to the traction force of the connecting member, and the piston connected to it is squeezed by the liquid and cannot move, so that the first rod and the second rod cannot move, thereby limiting the rotation of the vehicle body relative to the track wheel assembly.

[0027] When the fluid-passing assembly is connected to the first cavity and the second cavity, the operator applies a lifting force to one end of the vehicle body. At the end of the vehicle body subjected to the lifting force, the distance between the connection point of the connecting member on the track wheel assembly and the support member becomes larger and larger. At this time, the first cavity is located at the end close to the vehicle body in the lifted state. Because the first cavity is connected to the fluid-passing assembly at this time, the liquid in the first cavity is squeezed out of the first cavity under the action of the force of the first rod being pulled by the connecting member and driving the piston to move, causing the connecting member to pull the first rod, and the first rod pulls the piston and the second rod on the other side of the piston to slide toward the lifted side of the vehicle body, and the vehicle body can rotate smoothly relative to the track wheel assembly. When the vehicle body and the track wheel assembly reach the target angle, the fluid-passing assembly is closed. At this time, the two-way piston rod is in a locked state, and the angle formed by adjustment between the vehicle body and the track wheel assembly is fixed.

[0028] In any of the above technical solutions, the track wheel assembly includes a first end and a second end opposite to the first end, and at least two connecting parts include: a first traction line, which is respectively connected to an end of the first rod body located outside the first cavity and the first end of the track wheel assembly; a second traction line, which is respectively connected to an end of the second rod body located outside the second cavity and the second end of the track wheel assembly.

[0029] In this technical solution, the track wheel assembly includes a first end and a second end opposite to the first end. At least two connecting members include a first traction line and a second traction line, wherein the first traction line is respectively connected to an end of the first rod body located outside the first cavity and the first end of the track wheel assembly, and the second traction line is respectively connected to an end of the second rod body located outside the second cavity and the second end of the track wheel assembly, so that the two rod bodies and the track wheel assembly are each connected by an independent connecting member at their respective opposite ends, forming a closed connection loop. The first traction line and the second traction line apply relative traction at different ends to ensure the stability of the connection.

[0030] In any of the above technical solutions, the cart also includes: at least two support members, which are arranged on the vehicle body, and the cylinder body and the bidirectional piston rod are located between two adjacent support members; at least two connecting members are respectively passed through at least one support member and connected to the bidirectional piston rod, and part of the support member can rotate relative to the vehicle body under the traction of the connecting member.

[0031] In this technical solution, the cart also includes at least two support members, and the support members are arranged on the cart body, and the cylinder body and the bidirectional piston rod are located between two adjacent support members. Specifically, when the number of support members is two, from the front end to the rear end of the cart, there is a support member, a cylinder body and a bidirectional piston rod and another support member on the cart body in sequence.

[0032] At least two connecting parts are respectively passed through at least one supporting part and connected to the bidirectional piston rod. The supporting part is a component that indirectly connects the vehicle body and the connecting part, so that when the vehicle body is subjected to a lifting force, the connecting part can be pulled by the movement of the vehicle body under force, and finally drive the bidirectional piston rod to move.

[0033] The cylinder body and the two-way piston rod are located between two adjacent support members, so that the connecting member can be connected to the two-way piston rod when supported by the support member, ensuring that the connecting member is in a stretched and taut state when connected to the two-way piston rod, so that the track wheel assembly is firmly connected to the vehicle body, and the track wheel assembly will not rotate relative to the vehicle body during normal driving of the cart.

[0034] In any of the above technical solutions, the cart also includes: an operating member connected to the vehicle body, and when the liquid flow component is connected to the first cavity and the second cavity, one end of the vehicle body can be lifted or pressed down by the operating member, and the liquid flow component can discharge the liquid in the first cavity or the second cavity, so that the connecting member can pull the bidirectional piston rod in the cylinder toward the end of the vehicle body in the raised state, so that the vehicle body can rotate relative to the track wheel assembly.

[0035] In this technical solution, the cart also includes an operating member connected to the vehicle body, and the operator can lift or push the vehicle body through the operating member. When the fluid-passing assembly is connected to the first cavity and the second cavity, the operating member applies a lifting force to the vehicle body, which can lift one end of the vehicle body, so that the distance between the connection point of the track wheel assembly and the connecting member relative to the vehicle body and the cylinder body becomes larger and larger, and the connecting member generates a force to pull the bidirectional piston rod to move, so that the bidirectional piston rod generates a force to move toward the end of the vehicle body in the lifted state. At this time, if the cavity located near the end of the vehicle body in the lifted state is the first cavity, the liquid in the first cavity will be squeezed out of the first cavity under the action of the force transmitted by the bidirectional piston rod because the first cavity is connected to the fluid-passing assembly at this time. The bidirectional piston rod can move as the liquid is discharged, so that the connecting member can smoothly pull the bidirectional piston rod to slide toward the lifted side of the vehicle body, and the vehicle body can smoothly rotate relative to the track wheel assembly. The angle of the vehicle body relative to the track wheel assembly and the angle of the vehicle body relative to the ground can be easily adjusted, thereby improving the vehicle's ability to pass under various road conditions. When going uphill or downhill over long distances, the vehicle has better stability and is easier for personnel to operate.

[0036] In any of the above technical solutions, the vehicle body includes: a main body; a fixed beam, which is arranged on the main body and located on a side of the main body close to the track wheel assembly, and the cylinder body is detachably arranged on the fixed beam.

[0037] In this technical solution, the vehicle body includes a main body and a fixed beam. The main body serves as the main component of the entire cart, which can serve as the installation reference and load-bearing platform of the entire cart. Goods can be placed on the main body, and other components can also be assembled on the main body to finally form a complete cart structure.

[0038] The fixed beam in the vehicle body is arranged on the main body and is located on the side of the main body close to the track wheel assembly. The cylinder body is detachably arranged on the fixed beam, which makes it more convenient to assemble the cylinder body and facilitates the use of the cylinder body, the two-way piston rod and the connecting piece to realize the connection between the track wheel assembly and the main body.

[0039] In any of the above technical solutions, the vehicle body also includes a rotating shaft, which is rotatably arranged on the vehicle body, and the track wheel assembly includes: a frame, at least two connecting members are respectively connected to the two ends of the frame; a track wheel, the track wheel is rotatably arranged on the frame, the track wheel is connected to the rotating shaft, and the track wheel can rotate synchronously with the rotating shaft; a crawler, which is arranged on the outside of the track wheel, and the track wheel can drive the crawler to rotate.

[0040] In this technical solution, the track wheel assembly includes a frame, and at least two connecting members are respectively connected to the two ends of the frame, and the frame and the vehicle body are indirectly connected through the connecting members.

[0041] During travel, when the hydraulic assembly is disconnected from the first and second cavities, the bidirectional piston rod is locked in the cylinder, and the connector is unable to pull the bidirectional piston rod to move, ensuring normal travel. Furthermore, the connector has a certain degree of flexibility, allowing the frame to move up and down relative to the vehicle body, thereby adjusting the relative position between the frame and the vehicle body and achieving overall balance and shock absorption for the vehicle.

[0042] The crawler wheel is rotatably mounted on the frame and connected to the shaft. The crawler wheel can rotate synchronously with the shaft, that is, the crawler wheel rotates relative to the frame. The track is mounted on the outside of the crawler wheel, and the crawler wheel can drive the track to rotate, thereby enabling the cart to move.

[0043] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0045] Figure 1 A schematic structural diagram of a cart according to an embodiment of the present invention is shown;

[0046] Figure 2 It shows one of the structural schematic diagrams of a cart in use state according to one embodiment of the present invention;

[0047] Figure 3 The second structural diagram shows a cart in use according to an embodiment of the present invention;

[0048] Figure 4 The third structural diagram shows a cart in use state according to an embodiment of the present invention.

[0049] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0050] 100 trolley, 110 vehicle body, 112 main body, 114 fixed beam, 116 rotating shaft, 120 track wheel assembly, 122 frame, 124 first end, 126 second end, 128 track wheel, 130 first rotating wheel, 132 second rotating wheel, 134 track, 140 support member, 150 connecting member, 152 first traction line, 154 second traction line, 160 cylinder body, 170 two-way piston rod, 172 first rod body, 174 second rod body, 180 operating member, 182 first rod group, 184 second rod group, 190 liquid flow assembly, 192 liquid flow pipe, 194 control valve, 196 solenoid valve, 198 hydraulic valve. DETAILED DESCRIPTION

[0051] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0053] Refer to the following Figures 1 to 4 A cart 100 according to some embodiments of the present invention is described.

[0054] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a cart 100 proposed by the present invention includes: a vehicle body 110; a track wheel assembly 120, which is movably arranged on the vehicle body 110; at least two connecting members 150, at least two connecting members 150 are respectively connected to the two ends of the track wheel assembly 120; a cylinder 160, which is fixedly arranged on the vehicle body 110; a bidirectional piston rod 170, which is movably arranged inside the cylinder 160, and the bidirectional piston rod 170 divides the inside of the cylinder 160 into a first cavity and a second cavity, and the first cavity and the second cavity can accommodate liquid. The vehicle body 110 comprises a first cavity 110 and a second cavity 110, wherein the first cavity 110 and the second cavity 110 are connected to each other at the two opposite ends of the two-way piston rod 170. ...

[0055] The cart 100 proposed in the present invention includes a body 110. The body 110 serves as the main component of the entire cart 100 and can serve as the installation base and load-bearing platform for the entire cart 100. Cargo can be placed on the body 110, and other components can be assembled onto the body 110 to ultimately form the complete cart 100 structure. The cart 100 also includes a track wheel assembly 120, which is movably mounted on the body 110. It will be understood by those skilled in the art that the track wheel assembly 120 includes a wheel portion, a frame 122 that supports the wheel portion, and a track portion. After the track wheel assembly 120 is mounted to the body 110, the body 110 is pushed, and the wheel portion and track portion of the track wheel assembly 120 rotate accordingly, allowing the cart 100 to move forward or backward.

[0056] The cart 100 also includes at least two connectors 150, each connected to the ends of the track wheel assembly 120. The connectors 150 assist in assembling and connecting the track wheel assembly 120 to the vehicle body 110. The cart 100 also includes a cylinder 160 and a bidirectional piston rod 170. The cylinder 160 and the bidirectional piston rod 170 cooperate to allow the bidirectional piston rod 170 to slide left and right relative to the cylinder 160. Specifically, the cylinder 160 is fixedly mounted on the vehicle body 110, maintaining its position relative to the vehicle body 110. The bidirectional piston rod 170 is movably disposed within the cylinder body 160. The cylinder body 160 is a hollow cavity structure, and its left and right ends can be connected to the external environment. After the bidirectional piston rod 170 is inserted into the cylinder body 160, the bidirectional piston rod 170 divides the interior of the cylinder body 160 into a first cavity and a second cavity. Specifically, the first cavity is located on the left side of the cylinder body 160, while the second cavity is located on the right side of the cylinder body 160. Furthermore, after the bidirectional piston rod 170 is inserted into the cylinder body 160, the bidirectional piston rod 170 can block the portions of the left and right ends of the cylinder body 160 that are connected to the external environment, thereby isolating the first cavity and the second cavity from the external environment.

[0057] At least two connectors 150 are connected to opposite ends of the bidirectional piston rod 170. That is, through the at least two connectors 150, the cylinder 160, and the bidirectional piston rod 170, a complete connection structure is formed between the body 110 and the track wheel assembly 120 of the cart 100, allowing the two to be connected together. Both the first and second cavities can contain liquid. After the first and second cavities are filled with liquid, the bidirectional piston rod 170 is now in a state of relative force on both sides due to the interaction between the liquid in the different cavities and the inner wall of the cylinder 160. The bidirectional piston rod 170 cannot move relative to the cylinder 160 and is in a locked state, thereby preventing the body 110 from rotating relative to the track wheel assembly 120, ensuring that the cart 100 can travel on the road in a stable posture.

[0058] The cart 100 also includes a liquid passage component 190, which is arranged on the cylinder body 160 and can be connected to the first cavity and the second cavity. When the liquid passage component 190 is connected to the first cavity and the second cavity, the liquid passage component 190 can discharge the liquid in the first cavity or the second cavity.

[0059] When the cart 100 is traveling on a flat road, the body 110 is parallel to the ground, and the center of gravity of the cart 100 is on the center plane of the body 110. When a long distance uphill or downhill is required, the fluid passage assembly 190 is connected to the first cavity and the second cavity, and the operator applies force to one end of the body 110 to lift the end of the body 110. At the end of the body 110 that is subject to the lifting force, the distance between the connection point of the track wheel assembly 120 and the connector 150 relative to the body 110 and the cylinder 160 becomes larger and larger, and the connector 150 generates a force to pull the bidirectional piston rod 170 to move, so that the bidirectional piston rod 170 generates a force to move toward the end of the body 110 that is subject to the lifting force. At this time, if the cavity close to the end of the body 110 that is subject to the lifting force is the first cavity, Cavity, the liquid in the first cavity is connected to the fluid passing component 190 at this time, and under the action of the force transmitted by the two-way piston rod 170, the liquid will be squeezed out of the first cavity, so that the connecting member 150 pulls the two-way piston rod 170 to slide toward the side of the vehicle body 110 that is lifted, and the vehicle body 110 can rotate smoothly relative to the track wheel assembly 120. When the vehicle body 110 and the track wheel assembly 120 reach the target angle, the fluid passing component 190 is closed, and the two-way piston rod 170 is in a locked state, and the angle formed by adjustment between the vehicle body 110 and the track wheel assembly 120 is fixed.

[0060] After the angle of the body 110 of the cart 100 relative to the track wheel assembly 120 is adjusted, the center of gravity of the cart 100 is also adjusted. When climbing a slope, the body 110 can still remain horizontal, which not only improves the stability of the cart 100 when climbing uphill, but also reduces the operating difficulty for the operator.

[0061] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, when the fluid flow assembly 190 is disconnected from the first cavity and the second cavity, the liquid in the first cavity and the second cavity locks the bidirectional piston rod 170 in the cylinder 160 to limit the rotation of the vehicle body 110 relative to the track wheel assembly 120.

[0062] In this embodiment, when the fluid communication component 190 is disconnected from the first cavity and the second cavity, the liquid in the first cavity and the second cavity locks the bidirectional piston rod 170 to the cylinder 160. Specifically, after the first cavity and the second cavity are filled with liquid, if the fluid communication component 190 is not connected to the first cavity and the second cavity, the bidirectional piston rod 170 is in a state of force balance on the left and right sides due to the interaction between the liquid in different cavities and the inner wall of the cylinder 160. The bidirectional piston rod 170 cannot move relative to the cylinder 160 and is in a locked state, thereby preventing the vehicle body 110 from rotating relative to the track wheel assembly 120, ensuring that the cart 100 can travel on the road.

[0063] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the liquid flow assembly 190 includes: a liquid flow tube 192, which is arranged on the cylinder body 160, one end of the liquid flow tube 192 is connected to the first cavity, and the other end is connected to the second cavity; a control valve 194, which is arranged on the liquid flow tube 192 and is used to control the on and off of the liquid flow tube 192, wherein, when the control valve 194 is opened, the liquid in the first cavity can be transferred to the second cavity through the liquid flow tube 192, or the liquid in the second cavity can be transferred to the first cavity through the liquid flow tube 192.

[0064] In this embodiment, the liquid passage assembly 190 includes a liquid passage tube 192, which is disposed on the cylinder body 160. The liquid passage tube 192 has a space for liquid flow therein. One end of the liquid passage tube 192 is connected to the first cavity, and the other end is connected to the second cavity.

[0065] The liquid passage assembly 190 also includes a control valve 194, and the control valve 194 is provided on the liquid passage tube 192 for controlling the opening and closing of the liquid passage tube 192. When the control valve 194 is open, the liquid passage tube 192 is correspondingly connected to the first cavity and the second cavity, and the liquid in the first cavity can be transferred to the second cavity through the liquid passage tube 192, or the liquid in the second cavity can be transferred to the first cavity through the liquid passage tube 192. Specifically, when the control valve 194 is closed, the liquid passage tube 192 is not connected to the first cavity and the second cavity. After the first cavity and the second cavity are filled with liquid, the liquid does not have a corresponding channel to be discharged from the first cavity or the second cavity when subjected to force. At this time, the bidirectional piston rod 170 is in a state of force balance on the left and right sides due to the interaction between the liquid in different cavities and the inner wall of the cylinder body 160. The bidirectional piston rod 170 cannot move relative to the cylinder body 160 and is in a locked state, thereby preventing the vehicle body 110 from rotating relative to the track wheel assembly 120, thereby ensuring that the cart 100 can travel on the road.

[0066] When it is necessary to go uphill or downhill for a long distance, the control valve 194 is opened to connect the liquid pipe 192 with the first cavity and the second cavity. The operator applies force to one end of the vehicle body 110 to lift one end of the vehicle body 110. At the end of the vehicle body 110 subjected to the lifting force, the connection point between the track wheel assembly 120 and the connecting member 150 is increasingly farther away from the vehicle body 110 and the cylinder 160. The connecting member 150 generates a force to pull the two-way piston rod 170 to move, causing the two-way piston rod 170 to generate a tendency and force to move toward the end of the vehicle body 110 subjected to the lifting force. At this time, if the cavity close to the end of the vehicle body 110 subjected to the lifting force is the first cavity, the liquid in the first cavity is connected to the liquid pipe 192 at this time, and is transmitted by the two-way piston rod 170. Under the action of the force, it will be squeezed out of the first cavity, the volume of the first cavity will be reduced, and the liquid originally in the first cavity will enter the second cavity through the liquid pipe 192, causing the connecting piece 150 to pull the two-way piston rod 170 to slide toward the side of the vehicle body 110 that is subject to the lifting force, and the vehicle body 110 can rotate smoothly relative to the track wheel assembly 120. When the vehicle body 110 and the track wheel assembly 120 reach the target angle, the control valve 194 is closed. At this time, because the liquid originally in the first cavity enters the second cavity through the liquid pipe 192, even if the two-way piston rod 170 moves to one end in the cylinder body 160, causing the volume of the second cavity to increase, there will still be sufficient liquid to replenish the second cavity, and the first cavity and the second cavity are always kept full of liquid. This bidirectional piston rod 170 is in a state of force balance on the left and right sides due to the interaction between the liquid in different cavities and the inner wall of the cylinder body 160. The bidirectional piston rod 170 cannot move relative to the cylinder body 160 and is in a locked state, fixing the angle formed by adjusting the vehicle body 110 and the track wheel assembly 120.

[0067] Similarly, at this time, if the cavity close to the end of the vehicle body 110 that is subject to the lifting force is the second cavity, the liquid in the second cavity will be squeezed out of the second cavity under the action of the force transmitted by the two-way piston rod 170 because the second cavity is connected to the liquid pipe 192 at this time, and the volume component of the second cavity will be reduced. The liquid originally in the second cavity will enter the first cavity through the liquid pipe 192, causing the connecting member 150 to pull the two-way piston rod 170 to slide toward the side of the vehicle body 110 that is subject to the lifting force, and the vehicle body 110 can rotate smoothly relative to the track wheel assembly 120. When the vehicle body 110 and the track wheel assembly 120 reach the target angle, the control valve 194 is closed again. At this time, because the liquid originally in the second cavity enters the first cavity through the liquid pipe 192, even if the two-way piston rod 170 moves toward one end in the cylinder body 160, causing the volume of the first cavity to increase, sufficient liquid will still be replenished into the first cavity, and the first cavity and the second cavity will always be kept full of liquid. This bidirectional piston rod 170 is in a state of force balance on the left and right sides due to the interaction between the liquid in different cavities and the inner wall of the cylinder body 160. The bidirectional piston rod 170 cannot move relative to the cylinder body 160 and is in a locked state, fixing the angle formed by adjusting the vehicle body 110 and the track wheel assembly 120.

[0068] By providing fluid communication between the first and second cavities, fluid can be replenished into the other, larger, cavity when the volume of one cavity decreases and liquid is expelled, thus creating a closed-loop flow of fluid. This eliminates the need for additional external components connected to the cylinder 160 to refill the other cavity, improving operational convenience and reducing structural complexity. Both the first and second cavities can be maintained at a constant level of fluid corresponding to their current volumes via fluid communication with the control valve 194, thereby applying force to both the left and right sides of the bidirectional piston rod 170, thereby limiting its movement.

[0069] Specifically, the cylinder body 160 is provided with two liquid ports, which are respectively connected to the first cavity and the second cavity. The two ends of the liquid pipe 192 are arranged on the cylinder body 160 and are respectively connected to the two liquid ports, so that the liquid pipe 192 can be connected to the first cavity and the second cavity.

[0070] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the control valve 194 includes: a solenoid valve 196, which is arranged on the liquid pipe 192; a hydraulic valve 198, which is arranged in series with the solenoid valve 196 on the liquid pipe 192, and the solenoid valve 196 and the hydraulic valve 198 jointly control the opening and closing of the liquid pipe 192.

[0071] In this embodiment, the control valve 194 includes two valves: a solenoid valve 196 and a hydraulic valve 198. Specifically, the solenoid valve 196 is arranged on the liquid pipe 192, and the hydraulic valve 198 is arranged in series with the solenoid valve 196 on the liquid pipe 192. The solenoid valve 196 and the hydraulic valve 198 jointly control the on-off state of the liquid pipe 192. Specifically, when the vehicle is driving, the solenoid valve 196 and the hydraulic valve 198 are both in a closed state, the liquid pipe 192 is not connected to the first cavity and the second cavity, and the bidirectional piston rod 170 is locked to the cylinder body 160.

[0072] When a long-distance uphill or downhill trip is required, the angle of the vehicle body 110 relative to the track wheel assembly 120 needs to be adjusted, and the center of gravity of the cart 100 needs to be adjusted, the solenoid valve 196 is opened, and the hydraulic valve 198 is opened to the oil-flowing state. The liquid pipe 192 is connected to the first cavity and the second cavity, so that the liquid in the first cavity or the second cavity can be squeezed out through the liquid pipe 192 when subjected to the force of the movement of the bidirectional piston rod 170, and the bidirectional piston rod 170 is in a state where it can move left and right. The provision of two valve bodies, the solenoid valve 196 and the hydraulic valve 198, for control improves the accuracy of control. Specifically, the liquid flow assembly 190 also includes a switch, which is arranged next to the solenoid valve 196 and connected to the solenoid valve 196, for controlling the opening and closing of the solenoid valve 196. The switch located next to the solenoid valve 196 facilitates the operator's operation of opening and closing the solenoid valve 196.

[0073] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a first opening is formed on the cylinder body 160, which is connected to the first cavity; and a second opening is connected to the second cavity, and the bidirectional piston rod 170 includes: a piston, which is movably arranged inside the cylinder body 160, one side of the piston and the inner wall of the cylinder body 160 enclose a first cavity, and the other side of the piston and the inner wall of the cylinder body 160 enclose a second cavity; a first rod body 172, which is connected to one side of the piston, part of the first rod body 172 is located in the first cavity, and the other part of the first rod body 172 is passed through the first opening and is located outside the first cavity, and at least one connecting member 150 is connected to the first rod body 172; a second rod body 174, which is connected to the other side of the piston, part of the second rod body 174 is located in the second cavity, and the other part of the second rod body 174 is passed through the second opening and is located outside the second cavity, and at least one connecting member 150 is connected to the second rod body 174.

[0074] In this technical solution, the cylinder body 160 is provided with a first opening, which is connected to the first cavity. The cylinder body 160 is also provided with a second opening, which is connected to the second cavity. The first opening and the second opening connect the cylinder body 160 to the external environment.

[0075] The bidirectional piston rod 170 includes a piston, a first rod body 172, and a second rod body 174. The piston is movably disposed within the cylinder body 160. Specifically, the diameter of the piston is the same as the diameter of the internal cavity of the cylinder body 160, so that all four sides of the piston abut against the inner wall of the cylinder body 160. The piston serves to separate the internal space of the cylinder body 160. Specifically, one side of the piston and the inner wall of the cylinder body 160 enclose a first cavity, while the other side of the piston and the inner wall of the cylinder body 160 enclose a second cavity. Specifically, when the piston is within the cylinder body 160, the first cavity, the piston, and the second cavity are sequentially formed from the left end to the right end of the cylinder body 160.

[0076] A first rod 172 is connected to one side of the piston. A portion of the first rod 172 is located within the first cavity, while another portion of the first rod 172 extends through the first opening and is located outside the first cavity. At least one connector 150 is connected to the first rod 172. A second rod 174 is connected to the other side of the piston. A portion of the second rod 174 is located within the second cavity, while another portion of the second rod 174 extends through the second opening and is located outside the second cavity. At least one connector 150 is connected to the second rod 174. The first and second rods 172, 174 are connected to the connector 150. The diameters of the first and second rods 172, 174 are the same as the diameters of the first and second openings. When portions of the first and second rods 172, 174 extend through the first and second openings, they securely abut against the inner walls of the first and second openings, creating a complete seal between the first and second cavities. Thus, when the first and second cavities are filled with liquid, if the liquid-passing assembly 190 is disconnected from the first and second cavities, the first rod 172 and the second rod 174 are pulled by the connecting member 150, and the pistons connected thereto are squeezed by the liquid and cannot move, so that the first and second rods 172 and 174 cannot move either, thereby restricting the rotation of the vehicle body 110 relative to the track wheel assembly 120.

[0077] Specifically, when the cart 100 is traveling on a flat road, the first rod 172 and the second rod 174 extend out of the first opening to the same length, the cart body 110 is parallel to the ground, and the center of gravity of the cart 100 is on the center plane of the cart body 110 .

[0078] When the fluid passing assembly 190 is connected to the first cavity and the second cavity, the operator applies a lifting force to one end of the vehicle body 110. At the end of the vehicle body 110 subjected to the lifting force, the distance between the connection point of the connecting member 150 on the track wheel assembly 120 and the support member 140 becomes larger and larger. At this time, the first cavity is located near the end of the vehicle body 110 in the lifted state. Because the first cavity is connected to the fluid passing assembly 190 at this time, the liquid in the first cavity is pulled by the first rod 172 by the connecting member 150, thereby driving the piston to move. When in use, the liquid will be squeezed out of the first cavity, causing the connecting member 150 to pull the first rod 172, and the first rod 172 pulls the piston and the second rod 174 located on the other side of the piston to slide toward the raised side of the vehicle body 110, and the vehicle body 110 can rotate smoothly relative to the track wheel assembly 120. When the vehicle body 110 and the track wheel assembly 120 reach the target angle, the liquid passage component 190 is closed. At this time, the two-way piston rod 170 is in a locked state, and the angle formed by adjustment between the vehicle body 110 and the track wheel assembly 120 is fixed.

[0079] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the track wheel assembly 120 includes a first end 124 and a second end 126 opposite to the first end 124, and at least two connecting members 150 include: a first traction line 152, which is respectively connected to an end of the first rod body 172 located outside the first cavity and the first end 124 of the track wheel assembly 120; a second traction line 154, which is respectively connected to an end of the second rod body 174 located outside the second cavity and the second end 126 of the track wheel assembly 120.

[0080] In this technical solution, the track wheel assembly 120 includes a first end 124 and a second end 126 opposite to the first end 124. At least two connecting members 150 include a first traction line 152 and a second traction line 154, wherein the first traction line 152 is respectively connected to an end of the first rod 172 located outside the first cavity and the first end 124 of the track wheel assembly 120, while the second traction line 154 is respectively connected to an end of the second rod 174 located outside the second cavity and the second end 126 of the track wheel assembly 120. In this way, the two rods and the track wheel assembly 120 are connected at their respective opposite ends by independent connecting members 150, forming a closed connection loop. The first traction line 152 and the second traction line 154 apply relative traction at different ends to ensure the stability of the connection. Specifically, the first traction line 152 includes a steel rope, the second traction line 154 includes a steel wire, and the track wheel assembly 120, the first traction line 152, the second traction line 154, the first rod 172, the piston and the second rod 174 form a steel wire closed loop.

[0081] like Figure 1 and Figure 2As shown, in one embodiment of the present invention, the cart 100 further includes: at least two support members 140, which are arranged on the vehicle body 110, and the cylinder 160 and the bidirectional piston rod 170 are located between two adjacent support members 140; at least two connecting members 150 respectively pass through at least one support member 140 and are connected to the bidirectional piston rod 170, and part of the support member 140 can rotate relative to the vehicle body 110 under the traction of the connecting member 150.

[0082] In this embodiment, the cart 100 further includes at least two support members 140, and the support members 140 are provided on the cart body 110, and the cylinder 160 and the bidirectional piston rod 170 are located between two adjacent support members 140. Specifically, when there are two support members 140, from the front end to the rear end of the cart 100, there are one support member 140, a cylinder 160 and a bidirectional piston rod 170, and another support member 140 on the cart body 110 in sequence.

[0083] At least two connecting members 150 are respectively passed through at least one supporting member 140 and connected to the bidirectional piston rod 170. The supporting member 140 is a component that indirectly connects the vehicle body 110 and the connecting member 150, so that when the vehicle body 110 is subjected to a lifting force, the connecting member 150 can be pulled by the movement of the vehicle body 110, and finally drive the bidirectional piston rod 170 to move.

[0084] The cylinder body 160 and the two-way piston rod 170 are located between two adjacent support members 140, so that the connecting member 150 can be connected to the two-way piston rod 170 when supported by the support member 140, ensuring that the connecting member 150 is in a stretched and taut state when connected to the two-way piston rod 170, so that the track wheel assembly 120 and the vehicle body 110 are firmly connected, and the track wheel assembly 120 will not rotate relative to the vehicle body 110 during normal driving of the cart 100.

[0085] The partially rotatable support member 140 allows the connection member 150 to move more smoothly, thus preventing the connection member 150 from being damaged by friction during the traction process.

[0086] Specifically, the support member 140 includes a support and a pulley. The support is mounted on the vehicle body 110, and the pulley is mounted on the support, and the pulley can rotate on the support. A portion of the connector 150 is wound around the pulley, and the pulley can be pulled by the connector 150 to rotate relative to the support. During use, the vehicle body 110 tends to move upward, and the distance between the connection point of the connector 150 on the track wheel assembly 120 and the pulley increases. When the connector 150 is subjected to force, the pulley is also driven by the connector 150 to rotate. The connector 150 can smoothly pull the sliding member to slide toward the side of the vehicle body 110 that is subjected to the lifting force.

[0087] Specifically, the support member 140 further includes a lifting lug, and the connecting member 150 is passed through the pulley and the lifting lug is connected to the bidirectional piston rod 170 to ensure that the connecting member 150 will not fall off the pulley.

[0088] like Figure 1 and Figure 2 As shown, the cart 100 also includes: an operating member 180, which is connected to the vehicle body 110. When the liquid flow component 190 is connected to the first cavity and the second cavity, one end of the vehicle body 110 can be lifted or pressed down by the operating member 180, and the liquid flow component 190 can discharge the liquid in the first cavity or the second cavity, so that the connecting member 150 can pull the two-way piston rod 170 in the cylinder body 160 to move toward the end of the vehicle body 110 in the lifted state, so that the vehicle body 110 can rotate relative to the track wheel assembly 120.

[0089] In this embodiment, the cart 100 further includes an operating member 180, which is connected to the vehicle body 110. The operator can lift or push the vehicle body 110 through the operating member 180. When the liquid-passing assembly 190 is connected to the first cavity and the second cavity, the operating member 180 applies a lifting force to the vehicle body 110, which can lift one end of the vehicle body 110, so that the distance between the connection point of the track wheel assembly 120 and the connecting member 150 relative to the vehicle body 110 and the cylinder body 160 becomes larger and larger. The connecting member 150 generates a force that pulls the bidirectional piston rod 170 to move, so that the bidirectional piston rod 170 tends to move toward the end of the vehicle body 110 that is in the lifted state, and applies a force to the liquid. If the cavity located near the end of the vehicle body 110 in the raised state is the first cavity, the liquid in the first cavity will be squeezed out of the first cavity under the action of the force transmitted by the two-way piston rod 170 because the first cavity is connected to the liquid component 190 at this time. The two-way piston rod 170 can move as the liquid is discharged, so that the connecting member 150 can smoothly pull the two-way piston rod 170 to slide toward the side of the vehicle body 110 in the raised state, and the vehicle body 110 can smoothly rotate relative to the track wheel assembly 120. The angle of the vehicle body 110 relative to the track wheel assembly 120 and the angle of the vehicle body 110 relative to the ground can be easily adjusted, thereby improving the trafficability of the cart 100 under various road conditions. When going up or down long distances, the vehicle has better stability and is easier for people to operate.

[0090] Specifically, the operating member 180 includes a first rod group 182 and a second rod group 184. The first rod group 182 is arranged at one end of the vehicle body 110, and the second rod group 184 is arranged at the other end of the vehicle body 110. The rod groups respectively arranged at different ends of the vehicle body 110 can facilitate the operator to use the cart 100. The operator can push the cart 100 from the front end of the cart 100 through the first rod group 182, and can also push the cart 100 from the rear end of the cart 100 through the second rod group 184, thereby improving the convenience of use.

[0091] Furthermore, when adjusting the relative angle between the track wheel assembly 120 and the vehicle body 110, the first rod group 182 and the second rod group 184 located at different ends of the vehicle body 110 can also be adjusted separately, thereby reducing the difficulty of adjustment. When in use, it can be operated through the rod group at either end.

[0092] like Figure 2 As shown, when it is necessary to go uphill or downhill for a long distance, the cart 100 proposed by the present invention can adjust the angle and center of gravity. Specifically, first, the switch is turned to energize the solenoid valve 196, the hydraulic valve 198 is opened and the oil is passed, and the two-way piston rod 170 is in a state of being able to move left and right. At this time, the vehicle body 110 can rotate around the track wheel assembly 120. The operator presses down the second rod group 184 and lifts the first rod group 182. The end of the first rod group 182 that is lifted, the track wheel assembly 120 0. The distance between the connection point between the frame 122 and the connecting member 150 and the support member 140 is getting larger and larger, which drives the connecting member 150 to pull the two-way piston rod 170 to slide toward the side where the first rod group 182 is raised. When the vehicle body 110 and the track wheel assembly 120 reach the target angle, the solenoid valve 196 is closed, so that the hydraulic valve 198 is in a closed state. At this time, the two-way piston rod 170 is in a locked state, and the angle formed by the adjustment between the vehicle body 110 and the track wheel assembly 120 is fixed.

[0093] like Figure 3 As shown, after the center of gravity of the cart 100 is adjusted, the body 110 can still maintain a horizontal state when climbing a slope, which not only improves the stability of the cart 100 when climbing uphill, but also reduces the operating difficulty for the operator.

[0094] like Figure 4 As shown, if the center of gravity is not adjusted and the cart 100 remains on the horizontal ground when going uphill, the operator needs to apply a downward force F2 on the second rod group 184 and an upward force F1 on the first rod group 182 to prevent the vehicle from tipping over.

[0095] like Figure 1 and Figure 2As shown, in one embodiment of the present invention, the vehicle body 110 includes: a body 112; a fixed beam 114, which is arranged on the body 112 and located on a side of the body 112 close to the track wheel assembly 120, and the cylinder 160 is detachably arranged on the fixed beam 114.

[0096] In this embodiment, the vehicle body 110 includes a main body 112 and a fixed beam 114. The main body 112 serves as the main component of the entire cart 100 and can serve as the installation reference and load-bearing platform of the entire cart 100. Goods can be placed on the main body 112, and other components can also be assembled onto the main body 112 to ultimately form a complete cart 100 structure.

[0097] The fixed beam 114 in the vehicle body 110 is arranged on the main body 112 and is located on the side of the main body 112 close to the track wheel assembly 120. The cylinder body 160 is detachably arranged on the fixed beam 114, making it more convenient to assemble the cylinder body 160 and facilitate the use of the cylinder body 160, the two-way piston rod 170 and the connecting piece 150 to realize the connection between the track wheel assembly 120 and the main body 112.

[0098] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the vehicle body 110 further includes a rotating shaft 116, which is rotatably disposed on the vehicle body 110, and the track wheel assembly 120 includes: a frame 122, at least two connecting members 150 respectively connected to the two ends of the frame 122; a track wheel 128, the track wheel 128 is rotatably disposed on the frame 122, the track wheel 128 is connected to the rotating shaft 116, and the track wheel 128 can rotate synchronously with the rotating shaft 116; a crawler 134, which is disposed on the outside of the track wheel 128, and the track wheel 128 can drive the crawler 134 to rotate.

[0099] In this embodiment, the track wheel assembly 120 includes a frame 122 , and at least two connecting members 150 are respectively connected to both ends of the frame 122 . The connecting members 150 are used to indirectly connect the frame 122 to the vehicle body 110 .

[0100] When the cart 100 is in motion and the fluid passage assembly 190 is not in communication with the first and second cavities, the bidirectional piston rod 170 is locked to the cylinder 160, and the connector 150 is accordingly unable to pull the bidirectional piston rod 170 to move, thus ensuring normal travel of the cart 100. Furthermore, the connector 150 has a certain degree of flexibility, allowing the frame 122 to move up and down relative to the vehicle body 110 to a certain extent, thereby adjusting the relative position between the frame 122 and the vehicle body 110 and achieving overall balance and shock absorption for the cart 100.

[0101] The track wheel 128 is rotatably mounted on the frame 122 and is connected to the shaft 116. The track wheel 128 can rotate synchronously with the shaft 116, that is, the track wheel 128 rotates relative to the frame 122. The track 134 is disposed on the outside of the track wheel 128. The track wheel 128 can drive the track 134 to rotate, thereby enabling the cart 100 to move.

[0102] Specifically, the track wheels 128 include a first rotating wheel 130 and a plurality of second rotating wheels 132. The first rotating wheel 130 is rotatably mounted on the frame 122. The rotating shaft 116 is connected to the first rotating wheel 130. The first rotating wheel 130 rotates relative to the frame 122 along with the rotating shaft 116, thereby rotating the track. In other words, the first rotating wheel 130 serves as a driving wheel. The plurality of second rotating wheels 132 are rotatably mounted on the frame 122. A predetermined distance is formed between the frame 122 and the first rotating wheel 130 to support the track. This allows the inner side of the track to be supported, providing space for rotation, thereby completing the rotation and driving the cart 100. The second rotating wheels 132 serve as guide wheels.

[0103] In the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0104] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0105] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cart, characterized in that: include: body; a track wheel assembly movably arranged on the vehicle body; At least two connecting members, wherein the at least two connecting members are respectively connected to two ends of the track wheel assembly; a cylinder body, fixedly arranged on the vehicle body; a bidirectional piston rod movably disposed inside the cylinder body, the bidirectional piston rod dividing the inside of the cylinder body into a first cavity and a second cavity, the first cavity and the second cavity being capable of accommodating liquid, the at least two connecting members being respectively connected to opposite ends of the bidirectional piston rod; A liquid flow assembly is provided on the cylinder body and can be communicated with the first cavity and the second cavity. When the liquid flow assembly is communicated with the first cavity and the second cavity, the liquid flow assembly can discharge the liquid in the first cavity or the second cavity, so that the connecting member can pull the bidirectional piston rod to move in the cylinder body along the axial direction of the cylinder body, so that the vehicle body can rotate relative to the track wheel assembly.

2. The cart according to claim 1, wherein: When the fluid communication component is disconnected from the first cavity and the second cavity, the liquid in the first cavity and the second cavity locks the bidirectional piston rod to the cylinder to limit the rotation of the vehicle body relative to the track wheel assembly.

3. The cart according to claim 1, wherein: The liquid passage assembly comprises: a liquid passage pipe, disposed on the cylinder body, wherein one end of the liquid passage pipe is connected to the first cavity, and the other end of the liquid passage pipe is connected to the second cavity; A control valve is provided on the liquid pipe and is used to control the opening and closing of the liquid pipe, wherein when the control valve is opened, the liquid in the first cavity can be transferred to the second cavity through the liquid pipe, or the liquid in the second cavity can be transferred to the first cavity through the liquid pipe.

4. The cart according to claim 3, wherein: The control valve comprises: A solenoid valve is provided on the liquid passage pipe; A hydraulic valve is provided in series with the electromagnetic valve on the liquid pipe, and the electromagnetic valve and the hydraulic valve jointly control the opening and closing of the liquid pipe.

5. The cart according to claim 1, wherein: The cylinder body is provided with a first opening, which is connected to the first cavity; and a second opening, which is connected to the second cavity. The bidirectional piston rod includes: a piston movably disposed inside the cylinder, wherein one side of the piston and the inner wall of the cylinder define the first cavity, and the other side of the piston and the inner wall of the cylinder define the second cavity; a first rod connected to one side of the piston, a portion of the first rod located in the first cavity, another portion of the first rod passing through the first opening and located outside the first cavity, and at least one connecting member connected to the first rod; The second rod is connected to the other side of the piston, part of the second rod is located in the second cavity, and the other part of the second rod passes through the second opening and is located outside the second cavity. At least one connecting member is connected to the second rod.

6. The cart according to claim 5, wherein: The track wheel assembly includes a first end and a second end opposite to the first end, and the at least two connecting members include: a first traction line connected to one end of the first rod located outside the first cavity and a first end of the track wheel assembly; The second traction line is respectively connected to one end of the second rod body located outside the second cavity and the second end of the track wheel assembly.

7. The stroller according to any one of claims 1 to 6, characterized in that The cart further comprises: At least two support members are provided on the vehicle body, and the cylinder body and the bidirectional piston rod are located between two adjacent support members; The at least two connecting members are respectively passed through at least one of the supporting members and are connected to the bidirectional piston rod, and a portion of the supporting member can rotate relative to the vehicle body under the traction of the connecting member.

8. The stroller according to any one of claims 1 to 6, characterized in that The cart further comprises: An operating member is connected to the vehicle body. When the liquid flow component is connected to the first cavity and the second cavity, one end of the vehicle body can be lifted or pressed down by the operating member, and the liquid flow component can discharge the liquid in the first cavity or the second cavity, so that the connecting member can pull the bidirectional piston rod in the cylinder body to move toward the end of the vehicle body in the raised state, so that the vehicle body can rotate relative to the track wheel assembly.

9. The stroller according to any one of claims 1 to 6, characterized in that The vehicle body comprises: ontology; A fixed beam is provided on the main body and is located on a side of the main body close to the track wheel assembly. The cylinder body is detachably provided on the fixed beam.

10. The stroller according to any one of claims 1 to 6, characterized in that The vehicle body further includes a rotating shaft rotatably disposed on the vehicle body, and the track wheel assembly includes: A frame, wherein the at least two connecting members are respectively connected to two ends of the frame; A track wheel, the track wheel being rotatably disposed on the frame, the track wheel being connected to the rotating shaft, and the track wheel being capable of rotating synchronously with the rotating shaft; The crawler belt is arranged outside the crawler wheel, and the crawler wheel can drive the crawler belt to rotate.

Images