An ultra-low height heavy-duty lifting RGV system

Abstract

The invention discloses an ultra-low height heavy-duty lifting RGV system, comprising a chassis, a travel system, a power system and a lifting system; travel frames are arranged on both sides of the chassis, the travel system and the lifting system are arranged on the travel frames, the power system is drivingly connected to the travel system, the driving pump of the chassis is drivingly connected to the lifting system, and the power system comprises a hydraulic motor, a mounting frame and a transmission shaft; the mounting frame is arranged on the chassis, the hydraulic motor is mounted on the mounting frame, the transmission shaft is inserted in the mounting frame, the hydraulic motor is connected to the transmission shaft through a chain drive, couplings are connected at both ends of the transmission shaft, and the couplings are powered and connected to the travel system; a hydraulic motor is used to drive the travel wheels, so that the structural height of the entire power system is greatly reduced; the driving wheel and the driven wheel on one side are set as a single-rim structure, and the driving wheel and the driven wheel on the other side are set as a double-rim structure, so as to reduce the occurrence of jamming and take into account stable driving.

Description

Technical Field

[0001] The present invention relates to the technical field of RGV, and in particular to an ultra-low height heavy-duty lifting RGV system. Background Art

[0002] RGV (Rail Guided Vehicle) can be used in various warehouses with high-density storage. The vehicle channel can be designed to be arbitrarily long, which can increase the storage capacity of the entire warehouse. There is no need for forklifts to enter the aisles during operation, making it safer. It can be easily connected to other logistics systems automatically, such as entry and exit platforms, various buffer stations, conveyors, elevators and robots, etc., to transport materials according to plan; traditional container production and transportation requires forklifts to lift them to the transportation unit and then put them down, which is cumbersome and requires manpower; in the operation of RGV transporting containers, due to the narrow space at the bottom of the container, a lower RGV and its lifting equipment are required to smoothly enter the bottom space of the container, lift the container and transport it; at the same time, the container structure is high, and the center of gravity is high when running on the track, so the stability of RGV driving is poor. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an ultra-low height heavy-duty lifting RGV system with a low structural height, which can be directly inserted into the bottom of the cargo and automatically transported after being lifted, thereby realizing the automation function and having high stability when transporting containers.

[0004] Technical solution: To achieve the above-mentioned purpose, an ultra-low height heavy-duty lifting RGV system of the present invention includes a chassis, a travel system, a power system and a lifting system; travel frames are provided on both sides of the chassis, the travel system and the lifting system are arranged on the travel frames, the power system is driven and connected to the travel system, the driving pump of the chassis is driven and connected to the lifting system, the power system includes a hydraulic motor, a mounting frame and a transmission shaft; the mounting frame is arranged on the chassis, the hydraulic motor is installed on the mounting frame, the transmission shaft is inserted in the mounting frame, the hydraulic motor is connected to the transmission shaft through a chain drive, and couplings are connected at both ends of the transmission shaft, and the coupling is powered and connected to the travel system.

[0005] Furthermore, the chassis is also provided with a hydraulic oil tank, a hydraulic pump and a drive motor; the drive motor is drivingly connected to the hydraulic pump, the hydraulic pump is dynamically connected to the hydraulic oil tank, and the hydraulic oil tank is connected to the hydraulic motor.

[0006] Furthermore, the power system is also provided with a backup hydraulic motor.

[0007] Furthermore, the mounting frame is provided with a reinforcement plate.

[0008] Furthermore, the lifting system includes four lifting modules, and the four lifting modules are respectively arranged at the two ends of the traveling frame on both sides of the chassis; the lifting module includes a lifting platform, a first lifting structure frame, a second lowering structure frame and a guide column; the first lifting structure frame and the second lowering structure frame are arranged on both sides of the guide column opposite to each other, and the bottom surface of the lifting platform is connected to the top ends of the first lifting structure frame, the second lowering structure frame and the guide column; a column sleeve is provided between the first lifting structure frame and the second lowering structure frame, and the guide column sleeve is provided in the column sleeve; and oil cylinders are provided in the first lifting structure frame and the second lowering structure frame.

[0009] Furthermore, the oil cylinder includes a cylinder barrel, a sealing sleeve, a piston and a piston rod; the cylinder barrel is provided with a first oil port and a second oil port; the first oil port is provided at the bottom of the cylinder barrel, and the second oil port is provided at the side wall of the cylinder barrel; the sealing sleeve is provided at the top port of the cylinder barrel, the piston is provided at the bottom of the cylinder barrel, one end of the piston rod is inserted into the sealing sleeve, and the other end of the piston rod is connected to the piston.

[0010] Furthermore, the inner ring of the sealing sleeve is provided with a sealing groove, and a sealing ring is embedded in the sealing groove.

[0011] Furthermore, a connecting column is provided at the top end of the piston rod, and the connecting column is provided with a ring groove, and the ring groove corresponds to the lifting platform.

[0012] Further, the traveling frame includes a first traveling frame and a second traveling frame; the first traveling frame is provided with a first driving wheel group and a first driven wheel group; the first driving wheel group includes a first driving wheel and a first driving auxiliary wheel, the first driving wheel is transmission-connected to the first driving auxiliary wheel, and the first driving wheel is a double-rim structure; the first driven wheel group includes a first driven wheel and a first driven auxiliary wheel, and the first driven wheel is a double-rim structure; the second traveling frame is provided with a second driving wheel group and a second driven wheel group; the second driving wheel group includes a second driving wheel and a second driving auxiliary wheel, the second driving wheel is transmission-connected to the second driving auxiliary wheel, and the second driving wheel is a single-rim structure; the second driven wheel group includes a second driven wheel and a second driven auxiliary wheel, and the second driven wheel is a single-rim structure.

[0013] Beneficial effects: The ultra-low height heavy-duty lifting RGV system of the present invention can effectively reduce the structural height of the RGV, and at the same time has high stability when transporting containers, including but not limited to the following technical effects:

[0014] 1) A hydraulic motor is used to drive the traveling wheels, and the hydraulic oil tank and hydraulic pump are placed in the remaining space of the chassis, which greatly reduces the structural height of the entire power system;

[0015] 2) A backup hydraulic motor is set up. When a hydraulic motor fails, it can be switched to the backup hydraulic motor immediately, which improves the stability of RGV operation;

[0016] 3) By arranging the first oil port at the bottom of the cylinder barrel and making the bottom of the piston directly correspond to the first oil port, the overall height of the oil cylinder can be effectively shortened, so that the oil cylinder can maintain a low height outer structure while meeting the stroke requirements;

[0017] 4) The driving wheel and driven wheel on one side are set to a single-rim structure, and the driving wheel and driven wheel on the other side are set to a double-rim structure, so that the RGV has a certain amount of movable displacement compared to the track, reducing the occurrence of jamming and taking into account stable driving;

[0018] 5) Insert the RGV directly into the bottom of the cargo, lift it up and transport it automatically, realizing the automation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a structural diagram of the present invention;

[0020] Attached Figure 2 is a structural diagram of the power system of the present invention;

[0021] Attached Figure 3 It is a structural diagram of the lifting module of the present invention;

[0022] Attached Figure 4 It is a structural diagram of the oil cylinder of the present invention;

[0023] Attached Figure 5 is a structural diagram of the first driving wheel group of the present invention;

[0024] Attached Figure 6 is a structural diagram of the first driven wheel set of the present invention;

[0025] Attached Figure 7 is a structural diagram of the second driving wheel set of the present invention;

[0026] Attached Figure 8 It is a structural diagram of the second driven wheel set of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] As attached Figure 1-8: An ultra-low height heavy-duty lifting RGV system, comprising a chassis 1, a travel system, a power system and a lifting system; travel frames 11 are provided on both sides of the chassis 1, the travel system and the lifting system are arranged on the travel frames 11, the power system is driven and connected to the travel system, the driving pump of the chassis 1 is driven and connected to the lifting system, the power system comprises a hydraulic motor 21, a mounting frame 22 and a transmission shaft 23; the mounting frame 22 is arranged on the chassis 1, the hydraulic motor 21 is installed on the mounting frame 22, the transmission shaft 23 is inserted in the mounting frame 22, the The hydraulic motor 21 is driven and connected to the transmission shaft 23 through the chain 211. The two ends of the transmission shaft 23 are connected with couplings 231. The coupling 231 is dynamically connected to the travel system. The power system and the lifting system are controlled in working state through the control system. The hydraulic motor 21 drives the transmission shaft 23 to rotate through the chain 211. The transmission shaft 23 drives the driving wheel group 61 to move through the coupling 231. When the RGV runs to the bottom space of the container, the lifting system lifts the container to a suspended state and moves to the target location to complete the container transportation.

[0029] The chassis 1 is also provided with a hydraulic oil tank 12, a hydraulic pump 13 and a drive motor 14; the drive motor 14 is drive-connected to the hydraulic pump 13, the hydraulic pump 13 is power-connected to the hydraulic oil tank 12, and the hydraulic oil tank 12 is connected to the hydraulic motor 21; since the RGV is required to have a sufficiently low structure to enter the bottom space of the container, and the existing RGV usually uses a motor to directly drive the traveling wheels. Due to the volume problem of the motor and the transmission structure, this power system cannot meet the bottom space requirement of the carrying container. Therefore, the present invention uses a hydraulic motor to drive the traveling wheels, and at the same time, the hydraulic oil tank 12 and the hydraulic pump 13 are arranged in the remaining space of the chassis 1, so that the structural height of the entire power system is greatly reduced.

[0030] The power system is also provided with a backup hydraulic motor 212; when the hydraulic motor 21 fails, it can be immediately switched to the backup hydraulic motor 212, thereby improving the stability of the RGV operation.

[0031] The mounting frame 22 is provided with a reinforcing plate 221 .

[0032] The lifting system includes four lifting modules, which are respectively arranged at the two ends of the traveling frame 11 on both sides of the chassis 1; the lifting module includes a lifting platform 31, a first lifting structure frame 32, a second lowering structure frame 33 and a guide column 34; the first lifting structure frame 32 and the second lowering structure frame 33 are arranged on both sides of the guide column 34, and the bottom surface of the lifting platform 31 is connected to the top of the first lifting structure frame 32, the second lowering structure frame 33 and the guide column 34; a column sleeve 41 is arranged between the first lifting structure frame 32 and the second lowering structure frame 33, and the guide column 34 is sleeved in the column sleeve 41; an oil cylinder is arranged in the first lifting structure frame 32 and the second lowering structure frame 33; after the RGV enters the set position, the oil pump activates the oil cylinder in the first lifting structure frame 32 and the second lowering structure frame 33 to lift the lifting platform 31. After multiple lifting platforms 31 lift the container, the RGV travels to transport the container; by setting the first lifting structure frame 32 and the second lowering structure frame 33 to jointly support the lifting platform 31, the load-bearing capacity of the structure can be improved.

[0033] The oil cylinder comprises a cylinder barrel 51, a sealing sleeve 52, a piston 53 and a piston rod 54; the cylinder barrel 51 is provided with a first oil port 511 and a second oil port 512; the first oil port 511 is provided at the bottom of the cylinder barrel 51, and the second oil port 512 is provided at the side wall of the cylinder barrel 51; the sealing sleeve 52 is provided at the top port of the cylinder barrel 51, the piston 53 is provided at the bottom of the cylinder barrel 51, one end of the piston rod 54 is inserted into the sealing sleeve 52, and the other end of the piston rod 54 is connected to the piston 53; the working principle of the oil cylinder is the same as that of a double-acting hydraulic cylinder, and the first oil port 511 is supplied by a hydraulic pump to the first oil port 512. 11 and the second oil port 512 are filled with oil, which can control the piston 53 and the piston rod 54 to reciprocate up and down. Since conventional oil cylinders have many additional structures and reinforced structures, the structural height cannot meet the requirements of entering the bottom of the container. At the same time, conventional oil cylinders usually set the oil inlet on the side, so that the bottom structure is further increased; and the first oil port 511 of the oil cylinder is set at the bottom of the cylinder barrel 51, and the bottom of the piston 53 directly corresponds to the first oil port 511. Therefore, the oil cylinder can effectively shorten the overall height, so that the oil cylinder can maintain a low-height external structure while meeting the stroke.

[0034] The inner ring of the sealing sleeve 52 is provided with a sealing groove 521 , and a sealing ring is embedded in the sealing groove 521 .

[0035] A connecting column is disposed at the top end of the piston rod 54 . The connecting column is provided with a ring groove 541 . The ring groove 541 corresponds to the lifting platform 31 .

[0036] The traveling frame includes a first traveling frame 11 and a second traveling frame 15; the first traveling frame 11 is provided with a first driving wheel group 61 and a first driven wheel group 62; the first driving wheel group 61 includes a first driving wheel 611 and a first driving auxiliary wheel 612, the first driving wheel 611 is connected to the first driving auxiliary wheel 612 by transmission, and the first driving wheel 611 is a double-rim structure; the first driven wheel group 62 includes a first driven wheel 621 and a first driven auxiliary wheel 622, and the first driven wheel 621 is a double-rim structure; the second traveling frame 15 is provided with a second driving wheel group 71 and a second driven wheel group 72; the second driving wheel group 71 includes a second driving wheel 711 and a second driving auxiliary wheel 712, the second driving wheel 711 is connected to the second The driving auxiliary wheel 712 and the second driving wheel 711 are of a single-rim structure; the second driven wheel group 72 includes a second driven wheel 721 and a second driven auxiliary wheel 722, and the second driven wheel 721 is of a single-rim structure; if both the driving wheel and the driven wheel are set to a single-rim structure, the stability of the wheel relative to the track is low, and it is easy to deviate during the operation of the RGV, and derailment may occur in severe cases; if both the driving wheel and the driven wheel are set to a double-rim structure, the wear between the rim and the track will increase, and it is easy to get stuck when turning; therefore, the driving wheel and the driven wheel on one side are set to a single-rim structure, and the driving wheel and the driven wheel on the other side are set to a double-rim structure, so that the RGV has a certain amount of movable displacement compared to the track, reducing the occurrence of jamming, and taking into account stable driving.

[0037] The ultra-low height heavy-duty lifting RGV system controls its working state through a control system. The control system controls the hydraulic motor 21 to drive the RGV to the set container position. After the RGV reaches the bottom of the container, the oil cylinder is started to drive the lifting platform 31 to lift the container up and suspend it in the air. Then, the RGV moves to transport the container. After arriving at the set destination, the container is unloaded and the RGV drives away from the bottom of the container.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An ultra-low height heavy-duty lifting RGV system, characterized by: The invention comprises a chassis (1), a travel system, a power system and a lifting system; travel frames are provided on both sides of the chassis (1); the travel system and the lifting system are provided on the travel frames; the power system is drivingly connected to the travel system; the driving pump of the chassis (1) is drivingly connected to the lifting system; the power system comprises a hydraulic motor (21), a mounting frame (22) and a transmission shaft (23); the mounting frame (22) is provided on the chassis (1); the hydraulic motor (21) is mounted on the mounting frame (22); the transmission shaft (23) is inserted into the mounting frame (22); the hydraulic motor (21) is drivingly connected to the transmission shaft (23) via a chain (211); couplings (231) are connected at both ends of the transmission shaft (23); the coupling (231) is poweredly connected to the travel system; The lifting system comprises four lifting modules, which are respectively arranged at the two ends of the traveling frame on both sides of the chassis (1); the lifting modules comprise a lifting platform (31), a first lifting structure frame (32), a second lowering structure frame (33) and a guide column (34); the first lifting structure frame (32) and the second lowering structure frame (33) are arranged on both sides of the guide column (34) opposite to each other, and the bottom surface of the lifting platform (31) is connected to the top of the first lifting structure frame (32), the second lowering structure frame (33) and the guide column (34); a column sleeve (41) is arranged between the first lifting structure frame (32) and the second lowering structure frame (33), and the guide column (34) is sleeved in the column sleeve (41); and oil cylinders are arranged in the first lifting structure frame (32) and the second lowering structure frame (33); The traveling frame comprises a first traveling frame (11) and a second traveling frame (15); the first traveling frame (11) is provided with a first driving wheel group (61) and a first driven wheel group (62); the first driving wheel group (61) comprises a first driving wheel (611) and a first driving auxiliary wheel (612); the first driving wheel (611) is drivingly connected to the first driving auxiliary wheel (612); the first driving wheel (611) is a double-rim structure; the first driven wheel group (62) comprises a first driven wheel (621) and a first driven auxiliary wheel (622); the first driven wheel group (621) is a first driven auxiliary wheel (622); The driven wheel (621) is of a double wheel rim structure; the second traveling frame (15) is provided with a second driving wheel set (71) and a second driven wheel set (72); the second driving wheel set (71) comprises a second driving wheel (711) and a second driving auxiliary wheel (712); the second driving wheel (711) is drivingly connected to the second driving auxiliary wheel (712); the second driving wheel (711) is of a single wheel rim structure; the second driven wheel set (72) comprises a second driven wheel (721) and a second driven auxiliary wheel (722); the second driven wheel (721) is of a single wheel rim structure.

2. The ultra-low height heavy lifting RGV system according to claim 1 is characterized in that: The chassis (1) is further provided with a hydraulic oil tank (12), a hydraulic pump (13) and a drive motor (14); the drive motor (14) is drivingly connected to the hydraulic pump (13), the hydraulic pump (13) is motively connected to the hydraulic oil tank (12), and the hydraulic oil tank (12) is connected to the hydraulic motor (21).

3. The ultra-low height heavy lifting RGV system according to claim 1 is characterized in that: The power system is also provided with a backup hydraulic motor (212).

4. The ultra-low height heavy lifting RGV system according to claim 1 is characterized in that: The mounting frame (22) is provided with a reinforcing plate (221).

5. The ultra-low height heavy-duty lifting RGV system according to claim 1 is characterized in that: The oil cylinder comprises a cylinder barrel (51), a sealing sleeve (52), a piston (53) and a piston rod (54); the cylinder barrel (51) is provided with a first oil port (511) and a second oil port (512); the first oil port (511) is provided at the bottom of the cylinder barrel (51), and the second oil port (512) is provided at the side wall of the cylinder barrel (51); the sealing sleeve (52) is provided at the top port of the cylinder barrel (51), the piston (53) is provided at the bottom of the cylinder barrel (51), one end of the piston rod (54) is inserted into the sealing sleeve (52), and the other end of the piston rod (54) is connected to the piston (53).

6. The ultra-low height heavy lifting RGV system according to claim 5, characterized in that: The inner ring of the sealing sleeve (52) is provided with a sealing groove (521), and a sealing ring is embedded in the sealing groove (521).

7. The ultra-low height heavy lifting RGV system according to claim 5, characterized in that: A connecting column is provided at the top end of the piston rod (54), and the connecting column is provided with a ring clamping groove (541), and the ring clamping groove (541) corresponds to the lifting platform (31).

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