Log splitter with main oil cylinder and auxiliary oil cylinder
By designing a wood splitter with main and secondary oil cylinders, the hydraulic control components are used to achieve the coordinated work of the main and secondary oil cylinders, the existing wood splitters are solved, and the working efficiency and cost-effectiveness are improved.
Patent Information
- Application Number
- CN202421354823.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
When existing wood splitters are splitting, the thrust is insufficient or the speed is too slow, resulting in low working efficiency. Especially when the splitting force requirements at different wooden blocks and locations are different, it is difficult for the existing technology to adapt quickly.
Design a wood splitter with a main and secondary oil cylinder, and controls the work of the main and secondary oil cylinders through hydraulic control components. The main oil cylinder only completes the wood splitting in most cases. When encountering wood that is difficult to split, the secondary oil cylinder participates in Supercharged greatly increases the thrust of the main oil cylinder.
The rapid adjustment of the cutting force under the demand for splitting force of different wooden blocks and locations is achieved, which improves the working efficiency of the wood splitter, reduces working time, and reduces costs.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the field of agricultural and forestry machinery and equipment, in particular to a wood splitter with main and auxiliary oil cylinders. Background Art
[0002] There are many types of existing wood splitters. According to the power, they can be divided into wood splitters powered by human power, pneumatic power, electric power, and hydraulic power; according to the form of movement, they can be divided into fixed and mobile wood splitters. Wood splitters are widely used in the garden wood industry in Europe, America, and Australia. These countries are rich in wood resources, and they generally use wood for heating and cooking. At present, wood splitters at home and abroad are usually composed of several major parts such as power units, control valves, actuator cylinders, and frames. Most of the actuator cylinders use single-stage single-acting or single-stage double-acting hydraulic cylinders. In order to shorten the length of the wood splitter, a double-stage cylinder is also used. When the wood splitter is splitting wood, the cylinder is required to generate huge thrust. At the same time, when the wood block is not split or the wood block is lightly loaded after splitting, the cylinder is required to be able to advance quickly. When resetting, it is also required to be fast to improve work efficiency. Different wood blocks require different splitting forces, and the same wood block requires different splitting forces at different positions. For example, the splitting force required for splitting wood blocks at the root of a tree is relatively large, while the splitting force required for splitting wood blocks not at the root of a tree is relatively small. The splitting force at the node of a wood block with a node is larger than that at other parts. Therefore, there is a need for a wood splitter that can be quickly advanced when the splitting force is not large, and can generate a larger corresponding thrust when encountering large resistance. In the prior art, some larger wood splitters use a double pump, that is, the double pumps work at the same time when lightly loaded, generating a larger flow to supply the oil cylinder, thereby obtaining a faster speed, and when the load is large, the large pump of the double pump is automatically in an unloading state, and only the small pump works under high pressure and generates a larger thrust for the oil cylinder, which is achieved by changing the output flow and pressure of the oil pump. Although the flow of these larger wood splitters is already quite large, the working efficiency is still not ideal, and the operation time for one operation needs more than 15 seconds, and some small wood splitters do not have a dual-speed function due to various factors such as cost, and their working efficiency is extremely low, and the reciprocating operation time for one operation is about more than 30 seconds. There is also a kind of fast cylinder wood splitter. The fast cylinder is a two-stage cylinder structure. The piston rod of the large cylinder is made into the cylinder body of the small cylinder. The plunger rod of the small cylinder is completely built into the piston rod of the large cylinder, and the plunger rod of the small cylinder is fixed to the bottom of the large cylinder body. When no-load, hydraulic oil is pumped into the small cylinder to make the piston rod of the large cylinder move forward quickly. However, due to the small diameter of the small cylinder, the thrust of the small cylinder alone cannot split the wood blocks. It is only suitable for rapid extension when almost no-load, and cannot be quickly extended during actual wood splitting. Utility Model Content
[0003] The utility model aims to provide a wood splitter with main and auxiliary oil cylinders which can efficiently split wood and quickly reset and has a pressurizing function.
[0004] In order to achieve the above-mentioned purpose, the utility model is designed with a wood splitter with main and auxiliary oil cylinders, which includes a long strip frame, a vertical plate fixed on the upper plane at one end of the frame, main and auxiliary oil cylinders are installed in the positioning holes of the vertical plate, two rollers are respectively installed on the left and right sides of the bottom of the frame through axles, an engine is installed on the side of the frame, the engine drives a hydraulic pump, the hydraulic pump provides hydraulic oil to the main and auxiliary oil cylinders, and controls the operation of the main and auxiliary oil cylinders through a hydraulic control component, a tension spring for returning the main and auxiliary oil cylinders is installed between the front and rear ends of the main and auxiliary oil cylinders, and a tension spring is installed at the position opposite to the main and auxiliary oil cylinders. A wedge-shaped axe is fixed on the frame, and a push plate is fixed at the front end of the main and auxiliary oil cylinders, or the positions of the axe and the push plate are swapped. It is characterized in that the main and auxiliary oil cylinders include a main oil cylinder and an auxiliary oil cylinder, the cylinder body of the main oil cylinder also serves as the plunger rod of the auxiliary oil cylinder, and the inner diameter of the auxiliary oil cylinder is larger than the inner diameter of the main oil cylinder. The hydraulic control component includes a hydraulically controlled two-position two-way control valve for controlling the main oil cylinder and a hydraulically controlled two-position four-way control valve for controlling the auxiliary oil cylinder, as well as a manual two-position two-way control valve for controlling the flow of hydraulic oil output by the hydraulic pump into the hydraulically controlled two-position two-way control valve and the hydraulically controlled two-position four-way control valve.
[0005] The oil inlet of the hydraulically controlled two-position two-way control valve is connected to the oil outlet of the manual two-position two-way control valve, and the oil outlet is connected to the main oil cylinder.
[0006] The oil inlet and oil return port of the hydraulically controlled two-position four-way control valve are respectively connected to the oil outlet of the manual two-position two-way control valve and the hydraulic oil tank, and the two oil outlets are respectively connected to the two oil holes at the bottom of the auxiliary oil cylinder.
[0007] The manual two-position two-way control valve is a manual two-position two-way control valve with an H-shaped function.
[0008] The main beam of the frame is made by welding H-shaped steel and rectangular tube. The H-shaped steel is rotated 90 degrees into an I-shape and arranged above the rectangular tube. Both ends of the rectangular tube are sealed as hydraulic oil tanks.
[0009] Its characteristic is that the main beam of the frame is a long steel plate fixed on the upper surface of a rectangular tube, the width of the steel plate is greater than the width of the upper surface of the rectangular tube, and outwardly extending symmetrical side wings are formed on both sides of the rectangular tube. The two ends of the rectangular tube are sealed and serve as hydraulic oil tanks.
[0010] When a push plate is fixed to the front end of the main and auxiliary oil cylinders, the push plate is placed on the upper plane of the main beam and is fixed to the bottom surface of the push plate facing each other through two L-shaped connecting plates to form a slide groove. The two side wings on the main beam are inserted into the slide groove to form a slide structure.
[0011] A traction rod and a hooking device for connecting with a trailer are fixed on the main beam, and a support frame which can be lifted up and down is also installed on the main beam to maintain the stability of the wood splitter when it is working and the convenience of the wood splitter when it is towed and transferred.
[0012] The main oil cylinder and the auxiliary oil cylinder are both single-acting oil cylinders with a plunger structure.
[0013] The left and right sides of the vertical plate are respectively fixed with protruding short shaft heads, and a group of left and right pull rods are arranged on both sides of the main and auxiliary oil cylinders, and the left and right pull rods are respectively provided with front fixing holes, adjustment holes and rear fixing holes; when the wood splitter is working, the front fixing holes on the left and right pull rods are hinged with the two short shaft heads, and the rear fixing holes are hinged with the bottom of the auxiliary oil cylinder; when the wood splitter is not working, the main and auxiliary oil cylinders move forward, and the adjustment holes on the left and right pull rods are hinged with the two short shaft heads.
[0014] A wood splitter with a main and auxiliary oil cylinder manufactured according to the above scheme has a main oil cylinder and an auxiliary oil cylinder. In most cases, wood splitting can be completed by the operation of the main oil cylinder alone. When encountering a few woods that are difficult to split, the auxiliary oil cylinder participates in the work, pressurizes the main oil cylinder, and greatly increases the thrust of the main oil cylinder to complete the wood splitting. An axe or a push plate is set at the front end of the frame. When an axe is set at the front end of the frame, a push plate is set on the slide above the bed; when a baffle is set at the front end of the frame, an axe assembly is set on the slide above the bed. One end of the main oil cylinder is connected to the axe or the push plate, and the other end is directly fixed to the frame or fixed to the frame through the auxiliary oil cylinder. When splitting wood, the wood is placed between the axe and the push plate. When the hydraulic oil flows to the main cylinder, the auxiliary cylinder is in the oil return state. When the hydraulic oil flows to the auxiliary cylinder, the main cylinder oil return oil circuit is closed, so that the main cylinder plunger rod cannot retract. When the wood splitter is in the wood splitting working state, the auxiliary cylinder increases the hydraulic oil pressure in the main cylinder, thereby increasing the thrust of the main cylinder. The wood splitting force can be controlled by controlling the flow of hydraulic oil to the main cylinder or the auxiliary cylinder. The idea of this technical solution is that most wood blocks can be split by the main cylinder alone. A few difficult-to-split wood blocks require the auxiliary cylinder to increase the inner cavity pressure of the main cylinder to complete. Due to the limitation of the existing technology, the output pressure of the existing gear pump is generally around 25MPa and cannot be increased. The solution of the utility model is to increase the pressure of the inner cavity of the main cylinder through the auxiliary oil cylinder, so that the pressure in the inner cavity of the main cylinder can reach several times the output pressure of the oil pump, up to 60-80MPa. Since the main cylinder can obtain a very high pressure, the diameter of the main cylinder can be reduced accordingly. Under the condition of the same hydraulic oil flow, the smaller the diameter, the faster the speed, thereby achieving rapid wood splitting and improving production efficiency. In addition, the main cylinder and the auxiliary oil cylinder are both single-acting oil cylinders with a plunger structure. Since the inner wall of the plunger structure oil cylinder can be a rough inner wall, and the inner wall of the piston structure oil cylinder requires high dimensional accuracy and finish, the cost of the plunger structure oil cylinder is greatly reduced compared with the piston structure oil cylinder. The wood splitter with the main and auxiliary oil cylinders of the utility model is also equipped with a main and auxiliary oil cylinder reset tension spring, so that the plunger of the main oil cylinder can be quickly reset, further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1It is a left rear perspective view of a wood splitter with main and auxiliary cylinders;
[0016] Figure 2 It is a right rear perspective view of a wood splitter with main and auxiliary cylinders;
[0017] Figure 3 It is a right front side perspective view of a wood splitter with main and auxiliary cylinders;
[0018] Figure 4 It is an exploded view of the parts of a wood splitter with main and auxiliary cylinders;
[0019] Figure 5 This is the schematic diagram of the hydraulic system when the master cylinder is working;
[0020] Figure 6 This is the schematic diagram of the hydraulic system when the auxiliary cylinder is working;
[0021] Figure 7 It is the frame welding diagram;
[0022] Figure 8 It is a cross-sectional view of the push plate installed on the main beam composed of H-shaped steel and rectangular tube;
[0023] Fig. 9 It is a cross-sectional view of the push plate installed on the main beam composed of long steel plates and rectangular tubes;
[0024] Fig.10 It is a three-dimensional picture of the push plate;
[0025] Fig.11 This is the state diagram of the wood splitter when the main and auxiliary cylinders move forward;
[0026] Fig.12 This is a state diagram of the wood splitter when splitting wood.
[0027] In the figure: 1. frame; 2. vertical plate; 3. positioning hole; 4. main and auxiliary cylinders; 5. axle; 6. roller; 7. engine; 8. coupling; 9. hydraulic pump; 10. hydraulic control assembly; 11. axe; 12. push plate; 13. fixing hole; 14. ear piece; 15. tension spring; 16. main cylinder; 17. auxiliary cylinder; 18. cylinder body of main cylinder; 19. hydraulically controlled two-position two-way control valve; 20. hydraulically controlled two-position four-way control valve; 21. manual two-position two-way control valve; 22. main cylinder plunger rod; 23. main beam; 24. rectangular tube; 25. connecting plate; 26. slideway; 27. traction rod; 28. hitch device; 29. support frame; 30. short shaft head; 31. left and right pull rods; 32. front fixing hole; 33. adjustment hole; 34. rear fixing hole; 35. chopped wood; 36. steel plate. DETAILED DESCRIPTION
[0028] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0029] Figures 1 to 4 The present invention is a structural schematic diagram of a wood splitter with main and auxiliary oil cylinders. As can be seen from the figure, it includes a long frame 1, a vertical plate 2 is fixed on the upper plane at one end of the frame 1, and main and auxiliary oil cylinders 4 are installed in the positioning holes 3 of the vertical plate 2. Two rollers 6 are installed on the left and right sides of the bottom of the frame 1 through axles 5, and an engine 7 is installed on the side of the frame 1. The engine 7 drives a hydraulic pump 9 through a coupling 8. The hydraulic pump 9 provides hydraulic oil for the main and auxiliary oil cylinders 4 and controls the operation of the main and auxiliary oil cylinders 4 through a hydraulic control component 10. A wedge-shaped axe 11 is fixed on the frame 1 opposite to the main and auxiliary oil cylinders 4. The front ends of the main and auxiliary oil cylinders 4 are connected to the push plate 12 through the fixing holes 13 on the push plate 12, or the positions of the axe 11 and the push plate 12 are swapped, and the axe 11 is connected to the main and auxiliary oil cylinders 4 (not shown). Ear pieces 14 with holes are fixed on both sides of the push plate 12, and two tension springs 15 are installed between the ear pieces 14 and the bottom of the main and auxiliary oil cylinders 4 to return the main and auxiliary oil cylinders 4. Figure 5 As shown, it includes a main oil cylinder 16 and a sub-oil cylinder 17, both of which are single-acting oil cylinders with a plunger structure. The cylinder body 18 of the main oil cylinder also serves as the plunger rod of the sub-oil cylinder, and the inner diameter of the sub-oil cylinder 17 is larger than the inner diameter of the main oil cylinder 16.
[0030] like Figure 5 As shown, the hydraulic control assembly 10 includes a hydraulically controlled two-position two-way control valve 19 for controlling the main oil cylinder 16 and a hydraulically controlled two-position four-way control valve 20 for controlling the auxiliary oil cylinder 17, and a manual two-position two-way control valve 21 for controlling the flow of hydraulic oil output by the hydraulic pump 9 into the hydraulically controlled two-position two-way control valve 19 and the hydraulically controlled two-position four-way control valve 20. The hydraulically controlled two-position two-way control valve 19 has its oil inlet connected to the oil outlet of the manual two-position two-way control valve 21, and its oil outlet is connected to the main oil cylinder 16. The hydraulically controlled two-position four-way control valve 20 has its oil inlet and oil return port connected to the oil outlet of the manual two-position two-way control valve 19 and the hydraulic oil tank 24, respectively, and the two oil outlets are respectively connected to the two oil holes at the bottom of the auxiliary oil cylinder 17. The manual two-position two-way control valve 21 is a manual two-position two-way control valve 21 with an H-shaped function. When the wood splitter has a small load (wood is easy to split), the system pressure is also small, and the hydraulic oil enters the main cylinder 16 through the manual two-position two-way control valve 21 and the hydraulic two-position two-way control valve 20 to push the main cylinder plunger rod 22 out to split the wood. At this time, the hydraulic two-position four-way control valve 20 is in the closed state. Figure 5As shown. When the wood splitter is under heavy load (when the wood is not easy to split), the pressure in the system is relatively high. After the high-pressure oil passes through the manual two-position two-way control valve 21, the high-pressure oil overcomes the spring pressure in the hydraulic two-position two-way control valve 19 and pushes the hydraulic two-position two-way control valve 19 (valve core) to the left. At this time, the oil circuit to the main oil cylinder 16 is closed, and the high-pressure oil overcomes the spring pressure in the hydraulic two-position four-way control valve 20. At this time, the hydraulic two-position four-way control 20 (valve core) moves to the right, and the high-pressure oil reaches the auxiliary oil cylinder 17 through the two-position four-way control valve 20. The cylinder body 18 of the main oil cylinder (that is, the plunger rod of the auxiliary oil cylinder) extends, and at the same time, it also pushes the main oil cylinder 16 forward. Figure 6 As shown. At this time, the oil inlet hole into the main oil cylinder 16 has been closed, and the main oil cylinder 16 becomes a rigid body. Since the diameter of the auxiliary oil cylinder 17 is larger than the diameter of the main oil cylinder 16, the entire thrust is greater than the thrust of the single main oil cylinder plunger rod 22 as described above, and the wood that is not easy to split can be split. The diameter of the auxiliary oil cylinder 17 is usually between 1.25 and 2 times the diameter of the main oil cylinder 16.
[0031] like Figure 7 , Figure 8 The main beam 23 of the frame 1 is made of H-shaped steel and rectangular tube 24 welded together. The H-shaped steel is rotated 90 degrees into an I-shaped shape and arranged above the rectangular tube. The two ends of the rectangular tube 24 are sealed to serve as a hydraulic oil tank. The main beam 23 of the frame 1 can also be a long steel plate 36 fixed on the upper surface of the rectangular tube 24. The width of the steel plate 36 is greater than the width of the upper surface of the rectangular tube 24. Outwardly extending symmetrical side wings are formed on both sides of the rectangular tube 24. The two ends of the rectangular tube 24 are sealed to serve as hydraulic oil tanks. Fig. 9 As shown, this not only reduces the volume of the wood splitter, but also improves the strength and rigidity of the frame 1. When the front end of the main and auxiliary oil cylinders 4 is fixed with a push plate 12, the push plate 12 is placed on the upper plane of the main beam 23 and is fixed to the bottom surface of the push plate 12 by two L-shaped connecting plates 25 to form a slide groove 26, as shown in FIG. Fig.10 As shown, the two side wings on the main beam 23 are inserted into the slide groove 26 to form a slide structure as shown in FIG. Figure 8 The main beam 23 is fixed with a traction rod 27 and a hooking device 28 for connecting with a trailer. The main beam 23 is also equipped with a support frame 29 that can be raised and lowered to maintain the stability of the wood splitter when it is working and the convenience of the wood splitter when it is towed and transferred. Figure 3As shown. Outwardly extending short shaft heads 30 are fixed on the left and right sides of the vertical plate 2, respectively. A set of left and right tie rods 31 are provided on both sides of the main and auxiliary oil cylinders 4. The left and right tie rods 31 are provided with front fixing holes 32, adjustment holes 33 and rear fixing holes 34 in sequence. When the wood splitter is working, the front fixing holes 32 on the left and right tie rods 31 are hinged to the two short shaft heads 30, and the rear fixing holes 34 are hinged to the bottom of the auxiliary oil cylinder 17. When the wood splitter is not working, the main and auxiliary oil cylinders 4 move forward, and the adjustment holes 33 on the left and right tie rods 31 are hinged to the two short shaft heads 30 as shown. Fig.11 As shown, the center of gravity of the wood splitter is closer to the roller 6 at this time, and it is more suitable for towing. When splitting wood, the wood 35 to be split is placed between the axe 11 and the push plate 12. As the main and auxiliary oil cylinders 4 extend, the wood to be split is split by the axe 11 as shown in FIG. Fig.12 After the wood 35 is split, the manual two-position two-way control valve 21 (valve core) is pushed to the left, the main and auxiliary oil cylinders 4 are unloaded, and under the pull of the return spring 15, the main and auxiliary oil cylinders 4 are all retracted and returned to the position, and the next cycle of wood splitting can be carried out.
[0032] Of course, the above examples are only preferred embodiments of the present invention, but do not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application are still within the scope of protection covered by the present invention.
Claims
1. A wood splitter with main and auxiliary oil cylinders, which comprises a long frame, a vertical plate fixed on the upper plane at one end of the frame, main and auxiliary oil cylinders installed in the positioning holes of the vertical plate, two rollers are respectively installed on the left and right sides of the bottom of the frame through the wheel axle, an engine is installed on the side of the frame, the engine drives a hydraulic pump, the hydraulic pump provides hydraulic oil to the main and auxiliary oil cylinders, and controls the operation of the main and auxiliary oil cylinders through the hydraulic control assembly, a tension spring for returning the main and auxiliary oil cylinders is installed between the front and rear ends of the main and auxiliary oil cylinders, a wedge-shaped axe is fixed on the frame opposite to the main and auxiliary oil cylinders, a push plate is fixed at the front end of the main and auxiliary oil cylinders, or the positions of the axe and the push plate are swapped, and its characteristics are The master and slave cylinders include a master cylinder and a slave cylinder. The cylinder body of the master cylinder also serves as the plunger rod of the slave cylinder. The inner diameter of the slave cylinder is larger than the inner diameter of the master cylinder. The hydraulic control component includes a hydraulically controlled two-position two-way control valve for controlling the master cylinder and a hydraulically controlled two-position four-way control valve for controlling the slave cylinder, as well as a manual two-position two-way control valve for controlling the flow of hydraulic oil output by the hydraulic pump into the hydraulically controlled two-position two-way control valve and the hydraulically controlled two-position four-way control valve.
2. A wood splitter with main and auxiliary oil cylinders according to claim 1, characterized in that The oil inlet of the hydraulically controlled two-position two-way control valve is connected to the oil outlet of the manual two-position two-way control valve, and the oil outlet is connected to the main oil cylinder.
3. A wood splitter with main and auxiliary oil cylinders according to claim 1, characterized in that The oil inlet and oil return port of the hydraulically controlled two-position four-way control valve are respectively connected to the oil outlet of the manual two-position two-way control valve and the hydraulic oil tank, and the two oil outlets are respectively connected to the two oil holes at the bottom of the auxiliary oil cylinder.
4. A wood splitter with main and auxiliary oil cylinders according to claim 1, characterized in that The manual two-position two-way control valve is a manual two-position two-way control valve with an H-shaped function.
5. A wood splitter with main and auxiliary oil cylinders according to claim 1, characterized in that The main beam of the frame is made by welding H-shaped steel and rectangular tube. The H-shaped steel is rotated 90 degrees into an I-shape and arranged above the rectangular tube. Both ends of the rectangular tube are sealed as hydraulic oil tanks.
6. A wood splitter with main and auxiliary oil cylinders according to claim 1, characterized in that The main beam of the frame is a long steel plate fixed on the upper surface of a rectangular tube. The width of the steel plate is greater than the width of the upper surface of the rectangular tube, forming outwardly extending symmetrical flanks on both sides of the rectangular tube. The two ends of the rectangular tube are sealed and serve as hydraulic oil tanks.
7. A wood splitter with main and auxiliary oil cylinders according to claim 5 or 6, characterized in that When a push plate is fixed to the front end of the main and auxiliary oil cylinders, the push plate is placed on the upper plane of the main beam and is fixed to the bottom surface of the push plate facing each other through two L-shaped connecting plates to form a slide groove. The two side wings on the main beam are inserted into the slide groove to form a slide structure.
8. A wood splitter with main and auxiliary oil cylinders according to claim 5 or 6, characterized in that A traction rod and a hooking device for connecting with a trailer are fixed on the main beam, and a support frame which can be lifted up and down is also installed on the main beam to maintain the stability of the wood splitter when it is working and the convenience of the wood splitter when it is towed and transferred.
9. A wood splitter with main and auxiliary oil cylinders according to claim 1, characterized in that The main oil cylinder and the auxiliary oil cylinder are both single-acting oil cylinders with a plunger structure.
10. A wood splitter with main and auxiliary oil cylinders according to claim 1, characterized in that The left and right sides of the vertical plate are respectively fixed with protruding short shaft heads, and a group of left and right pull rods are arranged on both sides of the main and auxiliary oil cylinders, and the left and right pull rods are respectively provided with front fixing holes, adjustment holes and rear fixing holes; when the wood splitter is working, the front fixing holes on the left and right pull rods are hinged with the two short shaft heads, and the rear fixing holes are hinged with the bottom of the auxiliary oil cylinder; when the wood splitter is not working, the main and auxiliary oil cylinders move forward, and the adjustment holes on the left and right pull rods are hinged with the two short shaft heads.