Double-speed double-drive hydraulic log splitter

Abstract

The invention relates to the technical field of hydraulic wood splitting machines, in particular to a double-speed double-drive hydraulic wood splitting machine which overcomes the defects in the prior art and comprises a wood splitting bottom platform, an oil barrel is arranged on the wood splitting bottom platform, an oil cylinder is arranged at the top end of the oil barrel, and a chopper body is installed at the telescopic end of the oil cylinder. A motor, a main pump and a hydraulic control valve are installed on the outer wall of the oil barrel, a motor pump is arranged at the output end of the motor, a control mechanism used for operation is further arranged on the hydraulic control valve, when the oil cylinder moves downwards, the device works in two gears, when small-diameter wood or wood capable of being easily split is used, the device works in a fast gear, and when large wood is encountered and the splitting force is not enough, the device works in a fast gear. When the valve element is pressed down to the second gear position, low-speed large-splitting-force operation can be achieved, the working efficiency is improved, meanwhile, two driving modes are achieved so that the practicability in different operation environments can be improved, the valve element can be opened only with two hands during operation, and the safety performance during operation is improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic log splitter technology, and more particularly to a dual-speed, dual-drive hydraulic log splitter. Background Technology

[0002] A hydraulic log splitter, also known as a hydraulic splitter or hydraulic log splitter, is a mechanical device that uses hydraulic technology to split materials such as wood in half. It is commonly used in the wood processing industry to quickly and efficiently split round logs for further processing or convenient stacking.

[0003] Currently, the splitting speed of hydraulic log splitters cannot be adjusted. Regardless of whether the log is large or small, the splitting force is fixed. This results in the hydraulic log splitter's blade descending slowly when splitting small logs, leading to low splitting efficiency. In addition, most existing log splitters are operated with one hand, posing a certain safety hazard when the other hand is holding the log. Therefore, we propose a dual-speed, dual-drive hydraulic log splitter to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing hydraulic wood splitters, such as the inability to adjust the splitting speed, the slow splitting speed for large-diameter wood, which is too slow for small-diameter wood and results in low splitting efficiency. In addition, most existing wood splitters are operated with one hand, which poses a certain safety hazard when the other hand is holding the wood. Therefore, this invention proposes a dual-speed dual-drive hydraulic wood splitter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dual-speed dual-drive hydraulic wood splitter includes a wood splitting platform, an oil cylinder on the wood splitting platform, an oil cylinder at the top of the oil cylinder, a splitting blade body installed at the telescopic end of the oil cylinder, a motor, a main pump and a hydraulic control valve installed on the outer wall of the oil cylinder, a motor pump at the output end of the motor, and an oil inlet tee and an oil return tee on both sides of the main pump.

[0007] The oil inlet tee is equipped with a first check valve at one end connected to the main pump, and the other end of the oil inlet tee is connected to the motor pump through the motor pump output oil pipe. The last end of the oil inlet tee is connected to the hydraulic control valve through the valve inlet oil pipe. A second check valve is installed between the motor pump output oil pipe and the motor pump.

[0008] One end of the return oil tee is connected to the return oil port of the main pump, and the other end of the return oil tee is connected to the bottom of the oil cylinder through the suction pipe. The last end of the return oil tee is connected to the oil inlet of the motor pump through the hose.

[0009] The hydraulic control valve is connected to the top of the cylinder via a rodless chamber oil pipe, and to the bottom of the cylinder via a rod chamber oil pipe. The hydraulic control valve is also connected to the oil cylinder via a return oil pipe.

[0010] The hydraulic control valve is also equipped with a control mechanism for operation.

[0011] As a preferred embodiment of the present invention, the surface of the wood-splitting platform is provided with protruding ridges, and a left guardrail is fixed on the left side of the wood-splitting platform, and a right guardrail is provided on the right side of the wood-splitting platform, with the bottom of the right guardrail hinged to the wood-splitting platform.

[0012] The effect achieved by the above components is to restrict the wood when splitting it.

[0013] As a preferred embodiment of the present invention, the main body of the chopping knife is slidably mounted on the oil cylinder, and a guide rail plate is provided on one side of the tail end of the main body of the chopping knife, and an iron chain hook is provided on the other side of the tail end of the main body of the chopping knife. A hanging chain is fixed on the right guardrail, and the upper end of the hanging chain is suspended on the iron chain hook.

[0014] The effect achieved by the above components is that by suspending the chain on the iron chain hook, the main body of the splitting blade can drive the right guardrail to rotate upward during the upward process, thus supporting the wood.

[0015] As a preferred embodiment of the present invention, the control mechanism includes an intermediate shift fork plate rotatably connected to the valve core rod inside the hydraulic control valve. A rear shift fork plate is installed at the rear end of the intermediate shift fork plate, and an intermediate control rod is installed on the rear shift fork plate. One end of the intermediate shift fork plate is connected to a right-hand control rod via a first adjusting screw, and the other end of the intermediate shift fork plate is connected to a transverse connecting plate via a second adjusting screw. A longitudinal connecting plate is provided at the outer end of the transverse connecting plate, and a guide rail is connected to the top end of the longitudinal connecting plate via a spring. A left-hand control rod is installed at the lower end of the longitudinal connecting plate.

[0016] The aforementioned components achieve the following effect: when operating with one hand, the valve body cannot be opened to supply oil; both hands must be pressed simultaneously to control the downward movement of the hydraulic cylinder, causing the middle shift fork plate to pull the valve core open for operation. Since downward movement is dangerous, this component serves as a safety protection measure. Pushing the right-hand control lever upward controls the hydraulic cylinder to move upward; when the upper limit is reached, the guide rail pushes the middle control lever, causing the valve core to spring back and automatically stop.

[0017] As a preferred embodiment of the present invention, the guide rail is provided with an upper limit switch and a lower limit switch, and the upper end of the guide rail overlaps the middle shift fork plate.

[0018] The effect achieved by the above components is to adjust the formation of the hydraulic cylinder through the upper limit switch and the lower limit switch.

[0019] As a preferred embodiment of the present invention, both the first adjusting screw and the second adjusting screw include a screw and a connector threaded to both ends of the screw. The two ends of the first adjusting screw are respectively hinged to the middle shift fork plate and the right-hand control lever, and the two ends of the second adjusting screw are respectively hinged to the middle shift fork plate and the cross plate.

[0020] The effect achieved by the above components is that by adjusting the lengths of the first adjusting screw and the second adjusting screw, the operating height of the right-hand control lever, the middle shift fork plate, and the right-hand control lever can be adjusted.

[0021] As a preferred embodiment of the present invention, the longitudinal connecting plate is provided with a serrated groove, and one end of the transverse connecting plate is installed in the serrated groove by bolts.

[0022] The effect achieved by the above components is that the height of the longitudinal connecting plate can be adjusted by adjusting the installation position of the bolts at the outer end of the transverse connecting plate.

[0023] As a preferred embodiment of the present invention, the top of the oil cylinder is provided with an oil filling port, the bottom of the oil filling port is provided with an oil return filter, the oil cylinder is also provided with an oil level indicator, and the bottom of the oil cylinder is provided with an oil drain plug.

[0024] The effect achieved by the above components is to facilitate timely understanding of the liquid level inside the oil drum.

[0025] As a preferred embodiment of the present invention, the main pump is provided with a main pump input shaft at its outer end. The main pump input shaft is connected to an external tractor and drives the main pump to work through the tractor's rear output transmission shaft.

[0026] The aforementioned components achieve the following effect: providing an alternative operating mode, giving this device two operating modes: one is PTO drive, where the main pump is driven by the tractor's rear output drive shaft; the other is motor drive, where the motor pump operates. One-way valves are designed at the output ends of both the main pump and the motor pump, therefore, neither operating mode will generate back-pumping hydraulic pressure that could cause damage.

[0027] The beneficial effects of this invention are:

[0028] 1. When the hydraulic cylinder of this device descends, it operates in two speeds. In the fast speed, the control valve simultaneously supplies oil to the hydraulic cylinder inlet from both the oil inlet and outlet, accelerating the descent. In the slow speed, only the oil inlet supplies oil. The descent speed of the splitting blade can be adjusted by setting a dual-speed regulator to adapt to splitting wood of different diameters and improve work efficiency.

[0029] 2. When operating this device with one hand, the valve body cannot be opened to supply oil. Both hands must be pressed simultaneously to control the hydraulic cylinder to move downwards, causing the middle fork plate to pull the valve core open for operation. This downward movement is dangerous, thus providing a safety protection function. Pushing the right control lever upwards controls the hydraulic cylinder to move upwards. When the upper limit is reached, the guide rail pushes the middle control lever, causing the valve core to spring back and automatically stop. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the main structure of a dual-speed, dual-drive hydraulic log splitter proposed in this invention;

[0031] Figure 2 This is a side view of the structure of a dual-speed, dual-drive hydraulic log splitter proposed in this invention;

[0032] Figure 3 This is a schematic diagram of the left side of the oil circuit connection in a dual-speed, dual-drive hydraulic log splitter proposed in this invention;

[0033] Figure 4 This is a schematic diagram of the right side of the oil circuit connection in a dual-speed, dual-drive hydraulic log splitter proposed in this invention;

[0034] Figure 5 This is a schematic diagram of the control mechanism in a dual-speed, dual-drive hydraulic log splitter proposed in this invention;

[0035] Figure 6 This is a schematic diagram of the main body of the splitting blade in a dual-speed, dual-drive hydraulic wood splitter proposed in this invention;

[0036] Figure 7 This is a schematic diagram of the hydraulic principle of a dual-speed, dual-drive hydraulic log splitter proposed in this invention.

[0037] In the diagram: 1. Wood-splitting platform; 2. Oil drum; 21. Drain plug; 22. Oil level indicator; 23. Filler neck; 24. Return oil filter; 3. Oil cylinder; 4. Wood-splitting blade body; 41. Guide rail clamp; 42. Chain hook; 5. Left guardrail; 6. Right guardrail; 7. Hanging chain; 8. Motor; 81. Motor pump; 9. Main pump; 91. Main pump input shaft; 92. Oil inlet tee pipe; 10. Hydraulic control valve; 101. Control mechanism; 1011. Middle shift fork plate; 1012. First adjusting screw; 1013. Right hand... 1014. Control lever; 1015. Rear shift fork plate; 1016. Second adjusting screw; 1017. Horizontal connecting plate; 1018. Longitudinal connecting plate; 1019. Left hand control lever; 1020. Guide rail; 1021. Lower limit switch; 1022. Upper limit switch; 1023. Intermediate control lever; 11. Return oil tee pipe; 12. First check valve; 13. Suction pipe; 14. Second check valve; 15. Motor pump output oil pipe; 16. Valve inlet pipe; 17. Rod chamber oil pipe; 18. Rodless chamber oil pipe; 19. Return oil pipe. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] Reference Figure 1 , Figure 2 A dual-speed, dual-drive hydraulic log splitter includes a log splitting platform 1, an oil cylinder 2 mounted on the platform 1, an oil cylinder 3 mounted at the top of the oil cylinder 2, a splitting blade body 4 mounted on the telescopic end of the oil cylinder 3, raised ridges on the surface of the platform 1, a left guardrail 5 fixed to the left side of the platform 1, a right guardrail 6 mounted on the right side of the platform 1, the bottom of the right guardrail 6 being hinged to the platform 1, and the splitting blade body 4 slidingly mounted on the oil cylinder 2, with a [missing information - likely a design element] on one side of the tail end of the splitting blade body 4. The main body of the splitting blade 4 is equipped with a guide rail plate 41. On the other side of the tail end of the splitting blade body 4, there is an iron chain hook 42. A hanging chain 7 is fixed on the right guardrail 6. The upper end of the hanging chain 7 is suspended on the iron chain hook 42. By suspending the hanging chain 7 on the iron chain hook 42, the splitting blade body 4 can drive the right guardrail 6 to rotate upward during the upward process, thus supporting the wood. By setting the protruding rib, the left guardrail 5 and the right guardrail 6, the wood is restricted during splitting, reducing the factors of wood tipping and sliding, and improving the stability of the wood during splitting.

[0042] Meanwhile, the top of the oil cylinder 2 is provided with an oil filling port 23, and the bottom of the oil filling port 23 is provided with an oil return filter 24. The oil cylinder 2 is also provided with an oil level indicator 22 and the bottom of the oil cylinder 2 is provided with an oil drain plug 21. The oil level indicator 22 makes it easy to know the liquid level in the oil cylinder 2 in a timely manner. At the same time, the oil drain plug 21 allows the hydraulic oil inside the oil cylinder 2 to be drained during maintenance.

[0043] Reference Figure 3 , Figure 4 The outer wall of the oil cylinder 2 is equipped with a motor 8, a main pump 9 and a hydraulic control valve 10. The output end of the motor 8 is equipped with a motor pump 81, and the two sides of the main pump 9 are respectively equipped with an oil inlet tee pipe 92 and an oil return tee pipe 11. The hydraulic control valve 10 is connected to the top of the oil cylinder 3 through a rodless chamber oil pipe 18, and the hydraulic control valve 10 is connected to the bottom of the oil cylinder 3 through a rod chamber oil pipe 17. The hydraulic control valve 10 is also connected to the oil cylinder 2 through an oil return pipe 19.

[0044] The oil inlet tee pipe 92 is connected to the main pump 9 at one end and is equipped with a first check valve 12. The other end of the oil inlet tee pipe 92 is connected to the motor pump 81 through the motor pump output oil pipe 15. The last end of the oil inlet tee pipe 92 is connected to the hydraulic control valve 10 through the valve inlet oil pipe 16. A second check valve 14 is installed between the motor pump output oil pipe 15 and the motor pump 81.

[0045] Secondly, one end of the return oil tee pipe 11 is connected to the return oil port of the main pump 9, and the other end of the return oil tee pipe 11 is connected to the bottom of the oil cylinder 2 through the suction pipe 13, and the last end of the return oil tee pipe 11 is connected to the oil inlet of the motor pump 81 through the hose.

[0046] Reference Figure 5 , Figure 6 , Figure 7 The hydraulic control valve 10 is also equipped with a control mechanism 101 for operation.

[0047] The control mechanism 101 includes an intermediate shift fork plate 1011 rotatably connected to the valve core rod inside the hydraulic control valve 10. A rear shift fork plate 1014 is installed at the rear end of the intermediate shift fork plate 1011. An intermediate control rod 1022 is installed on the rear shift fork plate 1014. One end of the intermediate shift fork plate 1011 is connected to a right-hand control rod 1013 via a first adjusting screw 1012. The other end of the intermediate shift fork plate 1011 is connected to a cross plate 1016 via a second adjusting screw 1015. The first adjusting screw 1012 and the second adjusting screw 1013 are connected to each other. Each of the 15 includes a screw and a connector threaded to both ends of the screw. The two ends of the first adjusting screw 1012 are hinged to the middle shift fork plate 1011 and the right-hand control lever 1013, respectively. The two ends of the second adjusting screw 1015 are hinged to the middle shift fork plate 1011 and the cross plate 1016, respectively. By adjusting the lengths of the first adjusting screw 1012 and the second adjusting screw 1015, the operating heights of the right-hand control lever 1013, the middle shift fork plate 1011, and the right-hand control lever 1013 can be adjusted.

[0048] A longitudinal connecting plate 1017 is provided at the outer end of the horizontal connecting plate 1016. A serrated groove is provided on the longitudinal connecting plate 1017. One end of the horizontal connecting plate 1016 is installed in the serrated groove by bolts. The height of the longitudinal connecting plate 1017 can be adjusted by adjusting the installation position of the bolts at the outer end of the horizontal connecting plate 1016. A guide rail 1019 is connected to the top of the longitudinal connecting plate 1017 by springs. An upper limit device 1021 and a lower limit device 1020 are provided on the guide rail 1019. The guide rail 1019 is snapped into the guide rail clamping plate 41 on the rear side of the splitting blade body 4. The upper limit device 1021 and the lower limit device 1020 are used to adjust the formation of the hydraulic cylinder 3. The upper end of the guide rail 1019 overlaps the middle shift fork plate 1011. A left-hand control lever 1018 is installed at the lower end of the longitudinal connecting plate 1017.

[0049] When operating with one hand, the valve body cannot be opened to supply oil. Both hands must be pressed simultaneously to control the downward movement of the hydraulic cylinder 3, which in turn pulls the valve core to open the valve for operation. This downward movement is dangerous, thus providing a safety protection function. Pushing the right control lever 1013 upward controls the hydraulic cylinder 3 to move upward. When the upper limit switch 1021 is reached, the guide rail 1019 pushes the middle control lever 1022, causing the valve core to spring back and automatically stop.

[0050] Furthermore, the main pump 9 has an input shaft 91 at its outer end, which connects to an external tractor. The tractor's rear output drive shaft drives the main pump 9, providing another operating mode. This gives the device two operating modes: one is PTO drive, where the tractor's rear output drive shaft drives the main pump 9; the other is motor 8 drive, where the motor 8 drives the motor pump 81. One-way valves are designed at the output ends of both the main pump 9 and the motor pump 81, so neither operating mode will generate back pressure that could cause damage. The main pump 9 is driven by the tractor's PTO, allowing it to work when towed by the tractor. The motor pump 81 can operate electrically, such as on a farm, when the tractor is not present, by simply plugging in a 380V power source.

[0051] In this embodiment: the device is operated by the control mechanism 101. When the hydraulic cylinder 3 descends, it operates in two speeds. For small-diameter wood or wood that can be easily split, the fast speed is sufficient. When encountering large wood and insufficient splitting force, the valve core is pressed down to the second speed position for slow, high-force splitting operation, improving work efficiency. In the fast speed mode, the hydraulic control valve 10 simultaneously supplies oil to the hydraulic cylinder 3's inlet and outlet ports, accelerating the descent speed. In the slow speed mode, only the inlet port supplies oil. By setting a dual-speed adjustment, the descent speed of the splitting blade body 4 can be adjusted to adapt to splitting wood of different diameters, improving work efficiency.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dual-speed dual-drive hydraulic wood splitter, comprising a wood splitting bottom platform (1), an oil cylinder (2) is arranged on the wood splitting bottom platform (1), an oil cylinder (3) is arranged at the top of the oil cylinder (2), a splitting blade body (4) is installed at the telescopic end of the oil cylinder (3), and the characteristics are: A motor (8), a main pump (9) and a hydraulic control valve (10) are mounted on the outer wall of the oil cylinder (2); a motor pump (81) is arranged at the output end of the motor (8), and an oil inlet tee pipe (92) and an oil return tee pipe (11) are respectively arranged on both sides of the main pump (9); One end of the oil inlet three-way pipe (92) connected to the main pump (9) is provided with a first non-return valve (12), and the other end of the oil inlet three-way pipe (92) is connected to the motor pump (81) through the motor pump output oil pipe (15), and the last end of the oil inlet three-way pipe (92) is connected to the hydraulic control valve (10) through the valve oil inlet pipe (16), and a second non-return valve (14) is installed between the motor pump output oil pipe (15) and the motor pump (81); One end of the oil return tee pipe (11) is connected to the oil return port of the main pump (9), and the other end of the oil return tee pipe (11) is connected to the bottom of the oil cylinder (2) through the oil suction pipe (13), and the last end of the oil return tee pipe (11) is connected to the oil inlet of the motor pump (81) through a hose; The hydraulic control valve (10) is connected to the top end of the oil cylinder (3) via a rodless chamber oil pipe (18), and the hydraulic control valve (10) is connected to the bottom end of the oil cylinder (3) via a rod chamber oil pipe (17), and the hydraulic control valve (10) is also connected to the oil barrel (2) via an oil return pipe (19); The hydraulic control valve (10) is also provided with a control mechanism (101) for operation.

2. A dual-speed dual-drive hydraulic wood splitter according to claim 1, characterized in that: The surface of the wood-splitting bottom platform (1) is provided with convex ridges, a left guardrail (5) is fixed on the left side of the wood-splitting bottom platform (1), a right guardrail (6) is provided on the right side of the wood-splitting bottom platform (1), and the bottom of the right guardrail (6) is hingedly connected to the wood-splitting bottom platform (1).

3. A dual-speed dual-drive hydraulic wood splitter according to claim 2, characterized in that: The splitting knife body (4) is slidably mounted on the oil cylinder (2), and a guide rail clamping plate (41) is arranged on one side of the rear end of the splitting knife body (4), and an iron chain hook (42) is arranged on the other side of the rear end of the splitting knife body (4). A hanging chain (7) is fixed on the right guardrail (6), and the upper end of the hanging chain (7) is suspended on the iron chain hook (42).

4. A dual-speed dual-drive hydraulic wood splitter according to claim 1, characterized in that: The control mechanism (101) comprises an intermediate fork plate (1011) rotatably connected to a valve core rod in a hydraulic control valve (10); a rear fork plate (1014) is mounted at the rear end of the intermediate fork plate (1011); an intermediate control rod (1022) is mounted on the rear fork plate (1014); one end of the intermediate fork plate (1011) is connected to a right-hand control rod (1013) via a first adjustment screw (1012); the other end of the intermediate fork plate (1011) is connected to a transverse connecting plate (1016) via a second adjustment screw (1015); a longitudinal connecting plate (1017) is arranged at the outer end of the transverse connecting plate (1016); the top end of the longitudinal connecting plate (1017) is connected to a guide rail (1019) via a spring; and a left-hand control rod (1018) is mounted at the lower end of the longitudinal connecting plate (1017).

5. A dual-speed dual-drive hydraulic wood splitter according to claim 4, characterized in that: An upper limiter (1021) and a lower limiter (1020) are provided on the guide rail (1019), and the upper end of the guide rail (1019) is overlapped on the middle fork plate (1011).

6. A dual-speed dual-drive hydraulic wood splitter according to claim 4, characterized in that The first adjusting screw (1012) and the second adjusting screw (1015) both include a screw and a connector threadedly connected at both ends of the screw. The two ends of the first adjusting screw (1012) are respectively hingedly connected to the middle fork plate (1011) and the right-hand control rod (1013), and the two ends of the second adjusting screw (1015) are respectively hingedly connected to the middle fork plate (1011) and the cross-connecting plate (1016).

7. A dual-speed dual-drive hydraulic wood splitter according to claim 4, characterized in that: The longitudinal connecting plate (1017) is provided with a sawtooth groove, and one end of the transverse connecting plate (1016) is installed in the sawtooth groove by means of bolts.

8. The dual-speed dual-drive hydraulic wood splitter according to claim 1, characterized in that: The top of the oil cylinder (2) is provided with a refueling port (23), a return oil filter (24) is provided below the refueling port (23), an oil mark (22) is also provided on the oil cylinder (2), and an oil drain plug (21) is provided at the bottom of the oil cylinder (2).

9. A dual-speed dual-drive hydraulic wood splitter according to claim 1, characterized in that: The outer end of the main pump (9) is provided with a main pump input shaft (91), which is connected to an external tractor and drives the main pump (9) to work via the rear output transmission shaft of the tractor.

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