Automatic tonnage adjusting system of rubber wheel road roller

Abstract

The utility model relates to an automatic tonnage adjusting system for a rubber-tired road roller, and belongs to the technical field of rubber-tired road rollers. Comprising a main machine frame, a plurality of sets of front wheels are installed at the front end of the main machine frame, a plurality of sets of rear wheels are installed at the rear end of the main machine frame, and a fixed balance weight assembly, an adjustable balance weight assembly A and an adjustable balance weight assembly B are installed in the middle of the main machine frame. The fixed counterweight assembly comprises a right fixed counterweight and a left fixed counterweight which are symmetrically arranged; and the tonnage automatic adjusting system of the rubber wheel road roller further comprises a hydraulic system for driving the left lifting oil cylinder assembly and the right lifting oil cylinder assembly to lift. The tonnage adjusting device has the beneficial effects that the tonnage adjusting device is provided with the adjustable counterweight component A, the adjustable counterweight component B and the hydraulic system for driving the left lifting oil cylinder component and the right lifting oil cylinder component to lift, so that the tonnage of the rubber-tired road roller can be quickly adjusted, the tonnage adjusting device has the advantages of time saving and labor saving, the practicability of the device is improved, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to an automatic tonnage adjustment system for a rubber-wheel roller, belonging to the technical field of rubber-wheel rollers. Background Art

[0002] Rubber-wheeled rollers, also known as tire rollers, are essential compaction equipment in road construction. Rubber-wheeled rollers use tires to statically compact the pavement materials under their own weight. Currently, the tonnage of common tire rollers is generally between 10-30t, and the main tonnages are 30t, 26t, 20t and 16t.

[0003] After searching, the patent application with application number 201721003972.1 discloses a tire roller with adjustable tonnage. The fuselage structure is an integral box-type structure, the front wheel is steered, and the rear wheel is driven. A counterweight arrangement is provided in the lower middle part of the roller, below the cab. The counterweight arrangement includes a fixed counterweight group, a detachable counterweight group, several fixed plates, a left plate, a right plate and a fuselage bottom plate. The detachable counterweight group is located in the lower part of the fuselage, and includes multiple layers of counterweight blocks that are symmetrically arranged in shape and position from the inside to the outside and have the same size and density. The center of gravity of each layer of counterweight blocks is consistent with the center of gravity of the roller. A movable connecting device is provided on the counterweight block. The detachable counterweight group is mounted on the fuselage bottom plate through the fixed plate, and the fuselage bottom plate is provided with several mounting positions for mounting the fixed plate.

[0004] Although the above patent can adjust the tonnage of the tire roller by setting a detachable counterweight group, the current technical considerations are not comprehensive and have the following disadvantages: each time the counterweight needs to be adjusted, the left and right plates must be removed first, and then the eight counterweights installed on the lower part of the fuselage must be adjusted. After the adjustment is completed, the left and right plates must be installed. The operation is cumbersome and time-consuming. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: how to optimize the structure of the rubber-wheeled roller, by setting an adjustable counterweight assembly A and an adjustable counterweight assembly B, so that the left lifting cylinder assembly controls the lifting of the adjustable counterweight B, and the right lifting cylinder assembly controls the lifting of the adjustable counterweight A, so as to realize rapid adjustment of the tonnage of the rubber-wheeled roller, and for this purpose, a rubber-wheeled roller tonnage automatic adjustment system is provided.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model discloses an automatic tonnage adjustment system for a rubber-wheeled roller, characterized in that it comprises a main frame, a plurality of front wheels are installed at the front end of the main frame, a plurality of rear wheels are installed at the rear end of the main frame, a fixed counterweight assembly, an adjustable counterweight assembly A and an adjustable counterweight assembly B are installed at the middle part of the main frame, the adjustable counterweight assembly A and the adjustable counterweight assembly B are symmetrically arranged, the fixed counterweight assembly comprises a symmetrically arranged right fixed counterweight and a left fixed counterweight, the adjustable counterweight assembly A comprises the adjustable counterweight A and a right lifting cylinder assembly for controlling the lifting of the adjustable counterweight A, the right lifting cylinder assembly is installed on the right fixed counterweight, the adjustable counterweight A is located below the right fixed counterweight, the adjustable counterweight assembly B comprises the adjustable counterweight B and a left lifting cylinder assembly for controlling the lifting of the adjustable counterweight B, the left lifting cylinder assembly is installed on the left fixed counterweight, the adjustable counterweight B is located below the left fixed counterweight and is symmetrically arranged with the adjustable counterweight A, and the automatic tonnage adjustment system for the rubber-wheeled roller also comprises a hydraulic system for driving the left lifting cylinder assembly and the right lifting cylinder assembly to lift and lower.

[0008] Preferably, the right lifting cylinder assembly includes a right lifting cylinder A and a right lifting cylinder B symmetrically arranged at both ends of the right fixed counterweight, and the left lifting cylinder assembly includes a left lifting cylinder A and a left lifting cylinder B symmetrically arranged at both ends of the left fixed counterweight, the left lifting cylinder A and the right lifting cylinder A are symmetrically arranged, the left lifting cylinder B and the right lifting cylinder B are symmetrically arranged, and the right lifting cylinder A, the right lifting cylinder B, the left lifting cylinder A and the left lifting cylinder B are all vertically arranged.

[0009] Preferably, the hydraulic system includes a hydraulic oil tank, a filter, a steering pump, a left electromagnetic reversing valve, a right electromagnetic reversing valve, a double hydraulically controlled non-return valve A and a double hydraulically controlled non-return valve B. The oil inlet of the steering pump is connected to the hydraulic oil tank through a filter. The oil outlet of the steering pump is divided into two oil supply pipelines, namely a first oil supply pipeline and a second oil supply pipeline. The first oil supply pipeline is connected to the original steering system, and the end of the main oil circuit of the second oil supply pipeline is connected to the first branch oil circuit and the second branch oil circuit. The end of the first branch oil circuit is connected to the P port of the left electromagnetic reversing valve, and the A port of the left electromagnetic reversing valve is connected to the first oil inlet of the double hydraulically controlled non-return valve B. The rod chambers of the lowering cylinder A and the left lifting cylinder B are connected to the first oil outlet of the double hydraulically controlled one-way valve B, the B port of the left solenoid reversing valve is connected to the second oil inlet of the double hydraulically controlled one-way valve B, the rodless chambers of the left lifting cylinder A and the left lifting cylinder B are connected to the second oil outlet of the double hydraulically controlled one-way valve B, and the T port of the left solenoid reversing valve is connected to the hydraulic oil tank through the return oil pipeline to form a first branch hydraulic system; the second branch oil circuit is connected to the right lifting cylinder A and the right lifting cylinder B through the right solenoid reversing valve and the double hydraulically controlled one-way valve A to form a second branch hydraulic system, and the structure of the second branch hydraulic system is the same as that of the first branch hydraulic system.

[0010] Preferably, the hydraulic system also includes a relief valve, the oil inlet of the relief valve is connected to the main oil circuit of the second oil supply pipeline, and the overflow port of the relief valve is connected to the hydraulic oil tank through an oil return line, which plays a role in pressure stabilization and safety protection.

[0011] Preferably, a left counterweight chamber and a right counterweight chamber surrounded by multiple groups of side panels are symmetrically arranged in the middle part of the main frame. The left fixed counterweight is installed in the chamber of the left counterweight chamber, and the right fixed counterweight is installed in the chamber of the right counterweight chamber. The cylinder body of the right lifting cylinder A is hinged to one end of the right fixed counterweight through the corresponding pin shaft A, the cylinder body of the right lifting cylinder A is hinged to the rear side plate of the right counterweight chamber through the corresponding pin shaft B, the cylinder body of the right lifting cylinder B is hinged to the other end of the right fixed counterweight through the corresponding pin shaft A, the cylinder body of the right lifting cylinder B is hinged to the front side plate of the right counterweight chamber through the corresponding pin shaft B, the piston rod of the right lifting cylinder A is connected to the articulated seat A of the adjustable counterweight A through the corresponding pin shaft C, and the piston rod of the right lifting cylinder B is connected to the articulated seat B of the adjustable counterweight A through the corresponding pin shaft D. The structure of the left counterweight chamber is the same as that of the right counterweight chamber.

[0012] Preferably, a right guard plate is installed on the right side of the right counterweight cavity, and the right guard plate is used to protect the adjustable counterweight A in the upper position. The adjustable counterweight A is located on the left side of the right guard plate. When the adjustable counterweight A needs to be replaced, the right lifting cylinder A and the right lifting cylinder B control the adjustable counterweight A to descend under the drive of the second branch hydraulic system. At this time, the adjustable counterweight A is in the lower position, and the adjustable counterweight A can be removed and replaced without removing the right guard plate. After the replacement is completed, the right lifting cylinder A and the right lifting cylinder B control the adjustable counterweight A to rise under the drive of the second branch hydraulic system. At this time, the adjustable counterweight A is in the upper position. position; a left guard plate is installed on the left side of the left counterweight cavity, and the left guard plate is used to protect the adjustable counterweight B in the upper position. The adjustable counterweight B is located on the right side of the left guard plate. When the adjustable counterweight B needs to be replaced, the left lifting cylinder A and the left lifting cylinder B control the adjustable counterweight B to descend under the drive of the first branch hydraulic system. At this time, the adjustable counterweight B is in the lower position, and the adjustable counterweight B can be removed and replaced without removing the left guard plate. After the replacement is completed, the left lifting cylinder A and the left lifting cylinder B control the adjustable counterweight B to rise under the drive of the first branch hydraulic system. At this time, the adjustable counterweight B is in the upper position.

[0013] Preferably, the left electromagnetic reversing valve and the double hydraulically controlled one-way valve B are integrated, and the right electromagnetic reversing valve and the double hydraulically controlled one-way valve A are integrated, which is convenient for installation and disassembly and saves space.

[0014] Preferably, the left electromagnetic reversing valve and the right electromagnetic reversing valve are both three-position four-way electromagnetic valves, and the double hydraulically controlled one-way valve B includes a first hydraulically controlled one-way valve and a second hydraulically controlled one-way valve. The oil inlet of the first hydraulically controlled one-way valve is connected to the oil control port of the second hydraulically controlled one-way valve, and the oil inlet of the second hydraulically controlled one-way valve is connected to the oil control port of the first hydraulically controlled one-way valve. The A port of the left electromagnetic reversing valve is connected to the rod chamber of the left lifting cylinder and the left lifting cylinder through the first hydraulically controlled one-way valve, and the B port of the left electromagnetic reversing valve is connected to the rodless chamber of the left lifting cylinder A and the left lifting cylinder B through the second hydraulically controlled one-way valve, so that the left lifting cylinder A and the left lifting cylinder B are bidirectionally locked to prevent the adjustable counterweight B from falling too fast or falling in a stationary state. The structure of the double hydraulically controlled one-way valve A is the same as that of the double hydraulically controlled one-way valve B, so that the right lifting cylinder A and the right lifting cylinder B are bidirectionally locked to prevent the adjustable counterweight A from falling too fast or falling in a stationary state.

[0015] Preferably, the overflow port of the overflow valve is connected to the oil inlet A of the oil return block, the T port of the left solenoid reversing valve is connected to the oil inlet B of the oil return block, the T port of the right solenoid reversing valve is connected to the oil inlet C of the oil return block, and the oil return port of the oil return block is connected to the hydraulic oil tank through the oil return pipeline. The oil return block serves to merge the oil return pipelines, thereby simplifying the installation of the hydraulic system.

[0016] Preferably, the overflow valve, the left electromagnetic reversing valve assembly, the right electromagnetic reversing valve assembly and the oil return block are all fixed to the main frame by corresponding bolts to make the structure stable.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model discloses an automatic tonnage adjustment system for a rubber-wheeled roller, which optimizes the structure of the rubber-wheeled roller. By arranging an adjustable counterweight component A, an adjustable counterweight component B and a hydraulic system for driving the left lifting cylinder component and the right lifting cylinder component to lift and lower, the left lifting cylinder component controls the lifting and lowering of the adjustable counterweight B, and the adjustable counterweight B can be disassembled and replaced without removing the left guard plate. The right lifting cylinder component controls the lifting and lowering of the adjustable counterweight A, and the adjustable counterweight A can be disassembled and replaced without removing the right guard plate, thereby realizing rapid adjustment of the tonnage of the rubber-wheeled roller, having the advantages of saving time and labor, and also improving the practicability of the equipment and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1It is a three-dimensional diagram of the utility model (the state in which the right guard plate and the right side wall of the right counterweight cavity are removed);

[0021] Figure 2 This is a schematic diagram of the hydraulic system of the utility model;

[0022] Figure 3 The side view of the utility model Figure 1 (Remove the right guard plate, and the adjustable counterweight A is in the lower position);

[0023] Figure 4 The side view of the utility model Figure 2 (Install the right guard plate, and the adjustable counterweight A is in the lower position);

[0024] Figure 5 The side view of the utility model Figure 3 (Remove the right guard plate, remove the right side wall of the right counterweight cavity, and the adjustable counterweight A is in the upper position);

[0025] Figure 6 It is a top view of the utility model.

[0026] In the figure: 1, hydraulic oil tank 2, filter 3, steering pump 4, overflow valve 5, rear side plate 6, front side plate 7, main frame 8, right fixed counterweight 9, left fixed counterweight 10, adjustable counterweight A 11, left solenoid reversing valve 12, right solenoid reversing valve 13, right lifting cylinder A 14, right lifting cylinder B 15, pin C 16, pin D 17, left lifting cylinder A 18, left lifting cylinder B 19, double hydraulically controlled one-way valve A 20, double hydraulically controlled one-way valve B 21, pin B 22, right guard plate 23, left guard plate 24, first hydraulically controlled one-way valve 25, second hydraulically controlled one-way valve. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] The present invention is further described below through specific embodiments, but is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0029] Embodiment 1, as Figure 1-2As shown, the automatic tonnage adjustment system of a rubber-wheeled roller comprises a main frame 7, a plurality of front wheels are installed at the front end of the main frame 7, a plurality of rear wheels are installed at the rear end of the main frame 7, a fixed counterweight assembly, an adjustable counterweight assembly A and an adjustable counterweight assembly B are installed in the middle of the main frame 7, the adjustable counterweight assembly A and the adjustable counterweight assembly B are symmetrically arranged, the fixed counterweight assembly comprises a symmetrically arranged right fixed counterweight 8 and a left fixed counterweight 9, the adjustable counterweight assembly A comprises an adjustable counterweight A10 and a control device for controlling the lifting of the adjustable counterweight A10 The right lifting cylinder assembly is installed on the right fixed counterweight 8, and the adjustable counterweight A10 is located below the right fixed counterweight 8. The adjustable counterweight assembly B includes an adjustable counterweight B and a left lifting cylinder assembly for controlling the lifting of the adjustable counterweight B. The left lifting cylinder assembly is installed on the left fixed counterweight 9, and the adjustable counterweight B is located below the left fixed counterweight 9 and is symmetrically arranged with the adjustable counterweight A10. The automatic tonnage adjustment system of the rubber-wheeled roller also includes a hydraulic system for driving the left lifting cylinder assembly and the right lifting cylinder assembly to lift and lower.

[0030] When the product needs to increase or reduce the counterweight, start the vehicle, operate the control switch of the left electromagnetic reversing valve 11, drive the left lifting cylinder assembly to descend to the specified position, at this time, the adjustable counterweight B is in the lower position, the adjustable counterweight B can be quickly disassembled and replaced, and the tonnage of the adjustable counterweight B is replaced with the required tonnage. After the replacement is completed, the left electromagnetic reversing valve 11 is operated to drive the left lifting cylinder assembly to rise to the specified height; operate the control switch of the right electromagnetic reversing valve 12 to drive the right lifting cylinder assembly to descend to the specified position, at this time, the adjustable counterweight A10 is in the lower position, the adjustable counterweight A10 can be quickly disassembled and replaced, and the tonnage of the adjustable counterweight A10 is replaced with the required tonnage. After the replacement is completed, the control switch of the right electromagnetic reversing valve 12 is operated to drive the right lifting cylinder assembly to rise to the specified height, thereby completing the adjustment of the tonnage of the rubber-tyred roller.

[0031] Embodiment 2, as Figure 1-6As shown, the automatic tonnage adjustment system of a rubber-wheeled roller comprises a main frame 7, a plurality of front wheels are installed at the front end of the main frame 7, a plurality of rear wheels are installed at the rear end of the main frame 7, a fixed counterweight assembly, an adjustable counterweight assembly A and an adjustable counterweight assembly B are installed in the middle of the main frame 7, the adjustable counterweight assembly A and the adjustable counterweight assembly B are symmetrically arranged, the fixed counterweight assembly comprises a symmetrically arranged right fixed counterweight 8 and a left fixed counterweight 9, the adjustable counterweight assembly A comprises an adjustable counterweight A10 and a control device for controlling the lifting of the adjustable counterweight A10 The right lifting cylinder assembly is installed on the right fixed counterweight 8, and the adjustable counterweight A10 is located below the right fixed counterweight 8. The adjustable counterweight assembly B includes an adjustable counterweight B and a left lifting cylinder assembly for controlling the lifting of the adjustable counterweight B. The left lifting cylinder assembly is installed on the left fixed counterweight 9, and the adjustable counterweight B is located below the left fixed counterweight 9 and is symmetrically arranged with the adjustable counterweight A10. The automatic tonnage adjustment system of the rubber-wheeled roller also includes a hydraulic system for driving the left lifting cylinder assembly and the right lifting cylinder assembly to lift and lower.

[0032] Furthermore, the right lifting cylinder assembly includes a right lifting cylinder A13 and a right lifting cylinder B14 symmetrically arranged at both ends of the right fixed counterweight 8, and the left lifting cylinder assembly includes a left lifting cylinder A17 and a left lifting cylinder B18 symmetrically arranged at both ends of the left fixed counterweight 9, the left lifting cylinder A17 is symmetrically arranged with the right lifting cylinder A13, the left lifting cylinder B18 is symmetrically arranged with the right lifting cylinder B14, and the right lifting cylinder A13, the right lifting cylinder B14, the left lifting cylinder A17 and the left lifting cylinder B18 are all vertically arranged.

[0033] Furthermore, the hydraulic system includes a hydraulic oil tank 1, a filter 2, a steering pump 3, a left electromagnetic reversing valve 11, a right electromagnetic reversing valve 12, a double hydraulically controlled non-return valve A19 and a double hydraulically controlled non-return valve B20. The oil inlet of the steering pump 3 is connected to the hydraulic oil tank 1 through the filter 2. The oil outlet of the steering pump 3 is divided into two oil supply pipelines, namely a first oil supply pipeline and a second oil supply pipeline. The first oil supply pipeline is connected to the original steering system, and the end of the main oil circuit of the second oil supply pipeline is connected to the first branch oil circuit and the second branch oil circuit. The end of the first branch oil circuit is connected to the P port of the left electromagnetic reversing valve 11, and the A port of the left electromagnetic reversing valve 11 is connected to the first oil inlet of the double hydraulically controlled non-return valve B20. The left lifting cylinder The rod chambers of A17 and the left lifting cylinder B18 are connected to the first oil outlet of the double hydraulically controlled one-way valve B20, the B port of the left solenoid reversing valve 11 is connected to the second oil inlet of the double hydraulically controlled one-way valve B20, the rodless chambers of the left lifting cylinder A17 and the left lifting cylinder B18 are connected to the second oil outlet of the double hydraulically controlled one-way valve B20, the T port of the left solenoid reversing valve 11 is connected to the hydraulic oil tank 1 through the return oil pipeline to form a first branch hydraulic system; the second branch oil circuit is connected to the right lifting cylinder A13 and the right lifting cylinder B14 through the right solenoid reversing valve 12 and the double hydraulically controlled one-way valve A19 to form a second branch hydraulic system, and the structure of the second branch hydraulic system is the same as that of the first branch hydraulic system.

[0034] Furthermore, the hydraulic system also includes a relief valve 4, the oil inlet of the relief valve 4 is connected to the main oil circuit of the second oil supply pipeline, and the overflow port of the relief valve 4 is connected to the hydraulic oil tank 1 through an oil return line, which plays a role in pressure stabilization and safety protection.

[0035] Furthermore, a left counterweight cavity and a right counterweight cavity surrounded by a plurality of side panels are symmetrically arranged in the middle of the main frame 7. The left fixed counterweight 9 is installed in the cavity of the left counterweight cavity, and the right fixed counterweight 8 is installed in the cavity of the right counterweight cavity. The cylinder body of the right lifting cylinder A13 is hinged to one end of the right fixed counterweight 8 through the corresponding pin shaft A, and the cylinder body of the right lifting cylinder A13 is hinged to the rear side plate 5 of the right counterweight cavity through the corresponding pin shaft B21. The cylinder body of the right lifting cylinder B14 It is hinged to the other end of the right fixed counterweight 8 through the corresponding pin A, the cylinder body of the right lifting cylinder B14 is hinged to the front side plate 6 of the right counterweight chamber through the corresponding pin B21, the piston rod of the right lifting cylinder A13 is connected to the articulated seat A of the adjustable counterweight A10 through the corresponding pin C15, and the piston rod of the right lifting cylinder B14 is connected to the articulated seat B of the adjustable counterweight A10 through the corresponding pin D16. The structure of the left counterweight chamber is the same as that of the right counterweight chamber.

[0036] Furthermore, a right guard plate 22 is installed on the right side of the right counterweight chamber, and the right guard plate 22 is used to protect the adjustable counterweight A10 in the upper position. The adjustable counterweight A10 is located on the left side of the right guard plate 22. When the adjustable counterweight A10 needs to be replaced, the right lifting cylinder A13 and the right lifting cylinder B14 control the adjustable counterweight A10 to descend under the drive of the second branch hydraulic system. At this time, the adjustable counterweight A10 is in the lower position, and the adjustable counterweight A10 can be disassembled and replaced without removing the right guard plate 22. After the replacement is completed, the right lifting cylinder A13 and the right lifting cylinder B14 control the adjustable counterweight A10 to rise under the drive of the second branch hydraulic system. The adjustable counterweight A10 is in the upper position; a left guard plate 23 is installed on the left side of the left counterweight cavity. The left guard plate 23 is used to protect the adjustable counterweight B in the upper position. The adjustable counterweight B is located on the right side of the left guard plate 23. When the adjustable counterweight B needs to be replaced, the left lifting cylinder A17 and the left lifting cylinder B18 control the adjustable counterweight B to descend under the drive of the first branch hydraulic system. At this time, the adjustable counterweight B is in the lower position. There is no need to remove the left guard plate 23. The adjustable counterweight B can be removed and replaced. After the replacement is completed, the left lifting cylinder A17 and the left lifting cylinder B18 control the adjustable counterweight B to rise under the drive of the first branch hydraulic system. At this time, the adjustable counterweight B is in the upper position.

[0037] Furthermore, the left electromagnetic reversing valve 11 and the double hydraulically controlled one-way valve B20 are integrated, and the right electromagnetic reversing valve 12 and the double hydraulically controlled one-way valve A19 are integrated, which is convenient for installation and disassembly and saves space.

[0038] Furthermore, the left electromagnetic reversing valve 11 and the right electromagnetic reversing valve 12 are both three-position four-way electromagnetic valves, and the double hydraulically controlled one-way valve B20 includes a first hydraulically controlled one-way valve 24 and a second hydraulically controlled one-way valve 25. The oil inlet of the first hydraulically controlled one-way valve 24 is connected to the oil control port of the second hydraulically controlled one-way valve 25, and the oil inlet of the second hydraulically controlled one-way valve 25 is connected to the oil control port of the first hydraulically controlled one-way valve 24. The A port of the left electromagnetic reversing valve 11 is connected to the rod chambers of the left lifting cylinder A17 and the left lifting cylinder B18 through the first hydraulically controlled one-way valve 24. The B port of the electromagnetic reversing valve 11 is connected to the rodless chamber of the left lifting cylinder A17 and the left lifting cylinder B18 through the second hydraulically controlled one-way valve 25, so that the left lifting cylinder A17 and the left lifting cylinder B18 can be bidirectionally locked to prevent the adjustable counterweight B from falling too fast or in a stationary state. The structure of the double hydraulically controlled one-way valve A19 is the same as that of the double hydraulically controlled one-way valve B20, so that the right lifting cylinder A13 and the right lifting cylinder B14 can be bidirectionally locked to prevent the adjustable counterweight A10 from falling too fast or in a stationary state.

[0039] Furthermore, the overflow port of the overflow valve 4 is connected to the oil inlet A of the oil return block, the T port of the left electromagnetic reversing valve 11 is connected to the oil inlet B of the oil return block, the T port of the right electromagnetic reversing valve 12 is connected to the oil inlet C of the oil return block, and the oil return port of the oil return block is connected to the hydraulic oil tank 1 through the oil return pipeline. The oil return block plays the role of merging the oil return pipelines, thereby simplifying the installation of the hydraulic system.

[0040] Furthermore, the overflow valve 4, the left electromagnetic reversing valve assembly, the right electromagnetic reversing valve assembly and the oil return block are all fixed to the main frame 7 by corresponding bolts to make the structure stable.

[0041] The utility model discloses an automatic tonnage adjustment system for a rubber-wheeled roller, which optimizes the structure of the rubber-wheeled roller. By arranging an adjustable counterweight component A, an adjustable counterweight component B and a hydraulic system for driving the left lifting cylinder component and the right lifting cylinder component to lift and lower, the left lifting cylinder component controls the lifting and lowering of the adjustable counterweight B, and the adjustable counterweight B can be disassembled and replaced without removing the left guard plate. The right lifting cylinder component controls the lifting and lowering of the adjustable counterweight A, and the adjustable counterweight A can be disassembled and replaced without removing the right guard plate, thereby realizing rapid adjustment of the tonnage of the rubber-wheeled roller, having the advantages of saving time and labor, and also improving the practicability of the equipment and saving costs.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the present utility model is defined by the attached claims and their equivalents.

[0043] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. An automatic tonnage adjustment system for a rubber-wheeled roller, characterized in that: The invention comprises a main frame (7), a front end of the main frame (7) is equipped with a plurality of front wheels, a rear end of the main frame (7) is equipped with a plurality of rear wheels, a fixed counterweight assembly, an adjustable counterweight assembly A and an adjustable counterweight assembly B are installed in the middle of the main frame (7), the adjustable counterweight assembly A and the adjustable counterweight assembly B are symmetrically arranged, the fixed counterweight assembly comprises a right fixed counterweight (8) and a left fixed counterweight (9) which are symmetrically arranged, the adjustable counterweight assembly A comprises an adjustable counterweight A (10) and a right lifting cylinder assembly for controlling the lifting of the adjustable counterweight A (10), The right lifting cylinder assembly is mounted on the right fixed counterweight (8), and the adjustable counterweight A (10) is located below the right fixed counterweight (8). The adjustable counterweight assembly B includes the adjustable counterweight B and a left lifting cylinder assembly for controlling the lifting of the adjustable counterweight B. The left lifting cylinder assembly is mounted on the left fixed counterweight (9), and the adjustable counterweight B is located below the left fixed counterweight (9) and is symmetrically arranged with the adjustable counterweight A (10). The automatic tonnage adjustment system for the rubber-wheeled roller also includes a hydraulic system for driving the left lifting cylinder assembly and the right lifting cylinder assembly to lift and lower.

2. The automatic tonnage adjustment system for a rubber-wheeled roller according to claim 1 is characterized in that: The right lifting cylinder assembly comprises a right lifting cylinder A (13) and a right lifting cylinder B (14) symmetrically arranged at two ends of a right fixed counterweight (8); the left lifting cylinder assembly comprises a left lifting cylinder A (17) and a left lifting cylinder B (18) symmetrically arranged at two ends of a left fixed counterweight (9); the left lifting cylinder A (17) is symmetrically arranged with the right lifting cylinder A (13); the left lifting cylinder B (18) is symmetrically arranged with the right lifting cylinder B (14); the right lifting cylinder A (13), the right lifting cylinder B (14), the left lifting cylinder A (17) and the left lifting cylinder B (18) are all arranged vertically.

3. The automatic tonnage adjustment system for a rubber-wheeled roller according to claim 2 is characterized in that: The hydraulic system comprises a hydraulic oil tank (1), a filter (2), a steering pump (3), a left electromagnetic reversing valve (11), a right electromagnetic reversing valve (12), a double hydraulically controlled non-return valve A (19) and a double hydraulically controlled non-return valve B (20). The oil inlet of the steering pump (3) is connected to the hydraulic oil tank (1) through the filter (2). The oil outlet of the steering pump (3) is divided into two oil supply pipelines, namely a first oil supply pipeline and a second oil supply pipeline. The first oil supply pipeline is connected to the original steering system. The end of the main oil circuit of the second oil supply pipeline is connected to the first branch oil circuit and the second branch oil circuit. The end of the first branch oil circuit is connected to the P port of the left electromagnetic reversing valve (11). The A port of the left electromagnetic reversing valve (11) is connected to the first oil inlet of the double hydraulically controlled non-return valve B (20). The left lifting cylinder A ( The rod chambers of the left lifting cylinder A (17) and the left lifting cylinder B (18) are both connected to the first oil outlet of the double hydraulically controlled non-return valve B (20), the B port of the left electromagnetic reversing valve (11) is connected to the second oil inlet of the double hydraulically controlled non-return valve B (20), the rodless chambers of the left lifting cylinder A (17) and the left lifting cylinder B (18) are both connected to the second oil outlet of the double hydraulically controlled non-return valve B (20), the T port of the left electromagnetic reversing valve (11) is connected to the hydraulic oil tank (1) through the return oil pipeline, forming a first branch hydraulic system; the second branch oil circuit is connected to the right lifting cylinder A (13) and the right lifting cylinder B (14) through the right electromagnetic reversing valve (12) and the double hydraulically controlled non-return valve A (19), forming a second branch hydraulic system, and the structure of the second branch hydraulic system is the same as that of the first branch hydraulic system.

4. The automatic tonnage adjustment system for a rubber-wheeled roller according to claim 3 is characterized in that: The hydraulic system further comprises a relief valve (4), the oil inlet of the relief valve (4) being connected to the main oil circuit of the second oil supply pipeline, and the overflow port of the relief valve (4) being connected to the hydraulic oil tank (1) via an oil return pipeline.

5. The automatic tonnage adjustment system for a rubber-wheeled roller according to claim 4 is characterized in that: The main frame (7) is symmetrically provided with a left counterweight cavity and a right counterweight cavity surrounded by a plurality of side panels in the middle thereof. The left fixed counterweight (9) is installed in the cavity of the left counterweight cavity, and the right fixed counterweight (8) is installed in the cavity of the right counterweight cavity. The cylinder body of the right lifting cylinder A (13) is hinged to one end of the right fixed counterweight (8) through a corresponding pin shaft A. The cylinder body of the right lifting cylinder A (13) is hinged to the rear side plate (5) of the right counterweight cavity through a corresponding pin shaft B (21). The cylinder body of the right lifting cylinder B (14) is hinged to the rear side plate (5) of the right counterweight cavity through a corresponding pin shaft The pin A is hinged to the other end of the right fixed counterweight (8), the cylinder body of the right lifting cylinder B (14) is hinged to the front side plate (6) of the right counterweight chamber through the corresponding pin B (21), the piston rod of the right lifting cylinder A (13) is connected to the hinge seat A of the adjustable counterweight A (10) through the corresponding pin C (15), and the piston rod of the right lifting cylinder B (14) is connected to the hinge seat B of the adjustable counterweight A (10) through the corresponding pin D (16). The structure of the left counterweight chamber is the same as that of the right counterweight chamber.

6. The automatic tonnage adjustment system for a rubber-wheeled roller according to claim 5 is characterized in that: A right guard plate (22) is installed on the right side of the right counterweight cavity, and the adjustable counterweight A (10) is located on the left side of the right guard plate (22). A left guard plate (23) is installed on the left side of the left counterweight cavity, and the adjustable counterweight B is located on the right side of the left guard plate (23).

7. The automatic tonnage adjustment system for a rubber-tyred roller according to claim 6 is characterized by: The left electromagnetic reversing valve (11) and the double hydraulically controlled non-return valve B (20) are integrated as one, and the right electromagnetic reversing valve (12) and the double hydraulically controlled non-return valve A (19) are integrated as one.

8. The automatic tonnage adjustment system for a rubber-tyred roller according to claim 7 is characterized by: The left electromagnetic reversing valve (11) and the right electromagnetic reversing valve (12) are both three-position four-way electromagnetic valves. The double hydraulically controlled check valve B (20) comprises a first hydraulically controlled check valve (24) and a second hydraulically controlled check valve (25). The oil inlet of the first hydraulically controlled check valve (24) is connected to the oil control port of the second hydraulically controlled check valve (25). The oil inlet of the second hydraulically controlled check valve (25) is connected to the oil control port of the first hydraulically controlled check valve (24). The port A of the left electromagnetic reversing valve (11) is connected to the rod chambers of the left lifting cylinder A (17) and the left lifting cylinder B (18) through the first hydraulically controlled check valve (24). The port B of the left electromagnetic reversing valve (11) is connected to the rodless chambers of the left lifting cylinder A (17) and the left lifting cylinder B (18) through the second hydraulically controlled check valve (25). The structure of the double hydraulically controlled check valve A (19) is the same as that of the double hydraulically controlled check valve B (20).

9. The automatic tonnage adjustment system for a rubber-tyred roller according to claim 8 is characterized in that: The overflow port of the overflow valve (4) is connected to the oil inlet A of the oil return block, the T port of the left electromagnetic reversing valve (11) is connected to the oil inlet B of the oil return block, the T port of the right electromagnetic reversing valve (12) is connected to the oil inlet C of the oil return block, and the oil return port of the oil return block is connected to the hydraulic oil tank (1) through an oil return pipeline.

10. The automatic tonnage adjustment system for a rubber-tyred roller according to claim 9, characterized in that: The overflow valve (4), the left electromagnetic reversing valve assembly, the right electromagnetic reversing valve assembly and the oil return block are all fixed to the main frame (7) by corresponding bolts.

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