Wood splitting machine

Abstract

The technical scheme belongs to the technical field of wood splitting devices, and particularly relates to a wood splitting machine which comprises a rack, a baffle, a wood splitting axe, a two-way rapid oil cylinder and a power unit. The two-way quick oil cylinder and the baffle plate are arranged on the rack; the wood breaking axe is installed at the driving end of the two-way rapid oil cylinder, the wood breaking axe is S-shaped, wood can be split more easily, and a working space used for containing the wood is formed among the rack, the baffle and the wood breaking axe; the power unit is integrated on the rack to provide oil pressure for the two-way rapid oil cylinder; the hydraulic control switch valve and the control valve are stacked and integrated into a whole through the two-way rapid oil cylinder. The main beam is arranged on the machine frame, the tail end of the main beam is bent and upwarped, the tail plate is embedded and welded to the tail end of the main beam, the reinforcing plates are arranged on the two sides of the tail plate, the main beam is formed by cutting an integral sectional material, and compared with a traditional main beam formed by welding three plates, machining procedures of the main beam are reduced; and the bent guide plate is additionally arranged between the baffle and the sliding rail on the main beam, so that the strength of the baffle is improved while residual wood grid chippings are conveniently cleaned.

Description

Technical Field

[0001] The technical solution relates to the technical field of wood splitting devices, in particular to a wood splitter. Background Art

[0002] As an important auxiliary equipment in the wood processing industry, existing wood splitters are mainly divided into two series: vertical and horizontal. Their core function is to use hydraulic principles to split hard wood such as stumps, large branches and logs to meet specific size requirements or convert them into materials for other uses.

[0003] When splitting wood, the wood splitter needs the cylinder to provide huge thrust, and at the same time, the cylinder can be quickly extended or retracted in the non-splitting stage or after the wood is split, so as to improve work efficiency. Therefore, some larger wood splitters use a double pump design to achieve this function. The double pump is composed of a low-pressure large pump and a high-pressure small pump in parallel. When the wood splitter does not need to split wood vigorously, the large pump and the small pump supply oil at the same time, working in a large flow and low pressure mode, so that the cylinder can achieve a faster speed under a smaller thrust; when a large thrust is required, the hydraulic oil in the large pump will flow back to the tank to ensure that the engine power is sufficient to meet the high-pressure work requirements of the small pump.

[0004] However, with respect to the above-mentioned related technologies, the inventor believes that the existing wood splitters still have the following shortcomings:

[0005] 1. When the double pump is used in an unevenly loaded working condition, the large pump is always running at high pressure, so the hydraulic oil pumped into the cylinder does not play a practical role and all the work is in vain. In addition, the large pump and the small pump working together require the entire hydraulic system to be equipped with a larger hydraulic oil tank, and the system heating problem is more serious.

[0006] 2. The existing wood splitter directly connects the guide rail on the main beam to the front baffle, and opens holes at the front end of the main beam for removing wood debris. This practice not only affects the structural strength of the main beam, but also makes the cleaning work extremely difficult because the broken wood needs to be discharged through these holes. At the same time, the effect of discharging the wood through the holes is not ideal, and all the residual wood cannot be effectively removed.

[0007] 3. The front baffle and tail plate of the main beam of the wood splitter are made of thick steel plates, which not only makes the entire wood splitter look bulky, but also the bending strength of the front baffle is not sufficiently guaranteed, resulting in insufficient strength. At the same time, the use of thicker steel plates also increases the manufacturing cost of the wood splitter, which has an adverse effect on production efficiency and cost control. Summary of the invention

[0008] The purpose of the technical solution is to provide a wood splitter, which provides a hydraulically controlled one-way valve on the large piston of the two-way fast cylinder so that the hydraulic oil in the rod chamber of the two-way fast cylinder can enter the rodless chamber when the two-way fast cylinder is under light load or no-load conditions, so that only a small pumping flow rate is required to achieve rapid extension of the piston rod, thereby solving the problem of low efficiency and large energy loss of the hydraulic system due to the huge working flow and large energy loss of the hydraulic system in the existing design.

[0009] Furthermore, the wood splitter of the technical solution adopts a two-way fast cylinder, which only requires a small amount of power and hydraulic system flow to operate, so that the system only needs a smaller oil tank and a matching integrated power unit. Secondly, the technical solution improves and partially strengthens the main beam of the wood splitter and the structural shape of the wood splitting axe to ensure that they can better cooperate with the efficient operation of the two-way fast cylinder, thereby improving the overall wood splitting performance and efficiency.

[0010] The purpose of this technical solution is achieved in this way:

[0011] A wood splitter, comprising: a frame for loading a bidirectional fast oil cylinder, a wood splitting axe and a power unit; a baffle mounted on the frame; a wood splitting axe slidably arranged on the frame, and the wood splitting axe is mounted on the driving end of the bidirectional fast oil cylinder; a working space for placing wood is formed between the baffle and the wood splitting axe; a bidirectional fast oil cylinder is mounted on the frame and connected to the wood splitting axe; a power unit is used to provide oil pressure to the bidirectional fast oil cylinder; the bidirectional fast oil cylinder comprises a hydraulic oil cylinder body; a large piston is slidably arranged in the hydraulic oil cylinder body and divides the inner cavity of the hydraulic oil cylinder body into A rod chamber and a rodless chamber; a piston rod, which is telescopically mounted on the hydraulic cylinder body, and the end of the piston rod extends into the rod chamber and is connected to the large piston; a hydraulically controlled one-way valve, which is mounted on the large piston and is used to connect the rod chamber and the rodless chamber; a quick reset unit, which is used to control the hydraulic oil in the rodless chamber to return to the rod chamber through the hydraulically controlled one-way valve; when the hydraulic oil enters the rodless chamber from the oil pump and drives the large piston to move, the oil pressure in the rod chamber increases and the hydraulically controlled one-way valve opens, so that the hydraulic oil in the rod chamber enters the rodless chamber through the hydraulically controlled one-way valve and pushes the large piston to move.

[0012] Preferably, the wood splitting axe is in the shape of an S-shaped eagle head, which includes a force-bearing body, a guide part and a blade part; the guide part is located at the lower side of the force-bearing body and the blade part and is arranged horizontally, the force-bearing body is arranged vertically above the guide part, and the blade part is arranged on the side of the force-bearing body away from the two-way rapid oil cylinder, and the front end of the blade part is provided with a cutting edge; a fixing part is arranged on the upper side of the cutting edge, and the fixing part is used to fix the wood; the lower half of the cutting edge is protrudingly provided with a knife edge part, and the knife edge part is used to split the wood; the fixing part is farther away from the two-way rapid oil cylinder than the knife edge part; an arc-shaped concave first blade part is formed between the fixing part and the knife edge part; and an inwardly inclined second blade part is formed on the lower side of the knife edge part.

[0013] Preferably, the frame has a main beam, the main beam base is H-shaped steel, the tail end of the main beam is bent and upturned, and a tail plate is inlaid and welded at the tail end of the main beam, reinforcement plates are arranged on both sides of the tail plate, and the ends of the two-way fast cylinder are installed on the reinforcement plate and the tail plate.

[0014] Preferably, reinforcing ribs are provided on both sides of the main beam, the upper ends of the reinforcing ribs are bent and placed above the main beam to form guide rails for the wood splitting axe to slide, and guide plates are obliquely arranged on both sides of the main beam, the guide plates are located between the guide rails and the baffles, and the guide plates are used for the wooden fence to fall from the upper end of the main beam.

[0015] Preferably, the baffle at the front end of the main beam has a plurality of reinforcing ribs on the side away from the wood splitting axe, and the plurality of reinforcing ribs are connected end to end and welded to form a reinforcing ring, and the inner walls of the reinforcing ring are welded by the reinforcing ribs.

[0016] Preferably, the power unit includes an engine, an adapter plate, an oil pump and an oil tank; the oil pump is arranged in the oil tank and is integrated with the engine through the adapter plate; the engine is connected to the frame; one side of the adapter plate is connected to the engine, and the other side is connected to the oil pump; the oil tank cover is arranged on the outer peripheral side of the oil pump, and the oil tank is connected to the adapter plate; the oil pump sequentially transports hydraulic oil to the hydraulic cylinder body through the adapter plate and the oil pipeline.

[0017] Preferably, a control unit is provided on the hydraulic cylinder body, and the control unit is connected to the power unit through an oil pipeline, and the control unit includes a control valve; the control valve is connected to the cylinder front cover of the hydraulic cylinder body in a plate-type manner, and the control valve and the cylinder rear cover of the hydraulic cylinder body are connected through two connecting oil pipes, and the control valve is used to control the connecting oil pipes to supply oil to the rodless chamber or the reset area of ​​the quick reset unit respectively.

[0018] Preferably, a hydraulically controlled switching valve is integrated on the control unit or the front cover of the cylinder, and when the hydraulic oil pressure in the rodless chamber reaches a set value P, the hydraulically controlled switching valve connects the rod chamber with the return oil pipeline; a second through hole is provided on the front cover of the cylinder, and the rod chamber and the return oil pipeline are connected through the second through hole; an oil circuit board is connected to the control valve, and the oil circuit board is mounted on the front cover of the cylinder, and a third through hole is provided on the oil circuit board, and the return oil pipeline and the second through hole are connected through the third through hole; the hydraulically controlled switching valve comprises: a thrust control push rod valve core, a second steel ball and a second spring; one end of the second spring is connected to the oil circuit board, and the other end is connected to the second steel ball, so as to make the second steel ball block the third through hole; the thrust control push rod valve core is slidably connected in the oil circuit board, and the push rod of the thrust control push rod valve core can pass through the third through hole and abut against the second steel ball.

[0019] Preferably, the hydraulic cylinder body includes a cylinder body, a cylinder front cover installed on the cylinder body, a sealing cover and a control valve connected to the cylinder front cover plate; the cylinder body includes: a cylinder steel pipe and a cylinder rear cover, the cylinder steel pipe, the cylinder rear cover and two connecting oil pipes are welded as one, and the cylinder rear cover is provided with an ejection oil hole connecting the rodless chamber and the control valve, and a hollow inner pull rod with a hole connecting the quick reset unit and the retraction oil hole of the control valve, and the two connecting oil pipes are inserted into the control valve.

[0020] Preferably, the quick reset unit comprises a hollow inner tie rod with a hole, a small piston, a push rod seat and a push rod assembly; the piston rod is hollow; one end of the hollow inner tie rod with a hole is connected to the cylinder rear cover of the hydraulic cylinder body, and the other end passes through the large piston and extends into the inner cavity of the piston rod, and the hollow inner tie rod with a hole is slidably connected to the large piston; a mounting cavity is arranged on the large piston, and a push rod seat and a push rod assembly are arranged in the mounting cavity; an oil channel connecting the rod cavity and the hydraulically controlled one-way valve is formed in the middle of the push rod seat and the push rod assembly; the part of the push rod seat adjacent to the hydraulically controlled one-way valve is the guide part 2, and an auxiliary piston cavity is formed between the peripheral side of the guide part 2 and the side wall of the mounting cavity, One end of the push rod assembly is arranged in the auxiliary piston cavity and forms a piston part, and the other end of the push rod assembly faces the hydraulically controlled one-way valve; the small piston is connected to one end of the hollow inner pull rod with a hole, and the circumference of the small piston is slidably connected to the inner cavity wall of the piston rod, and the small piston divides the inner cavity of the piston rod into a reset area and a yield area; the reset area is connected to the oil circuit inside the hollow inner pull rod with a hole; a control oil hole is opened on the piston rod, and the control oil hole is connected to the reset area, and the control oil hole makes the oil circuit between the reset area and the auxiliary piston cavity connected; when the hydraulic oil in the reset area enters the auxiliary piston cavity, the push rod assembly drives the hydraulically controlled one-way valve to open.

[0021] Compared with the prior art, the technical solution has the following outstanding and beneficial technical effects:

[0022] 1. The hydraulically controlled one-way valve designed in this technical solution enables the hydraulic oil in the rod chamber of the two-way fast cylinder to enter the rodless chamber when the cylinder is used under light load or no-load conditions, so that the piston rod can be pushed out faster with a smaller pump flow rate. This not only reduces the energy consumption of the hydraulic system and achieves environmental protection and energy saving, but also reduces the total demand for hydraulic oil and the transmission and control costs of hydraulic oil, thereby reducing the manufacturing cost and use cost of the product; in addition, the highly integrated design of the two-way fast cylinder has a simple structure and is easy to operate, which reduces the manufacturing cost.

[0023] 2. A hydraulically controlled on-off valve is designed on the control valve of this technical solution. The hydraulically controlled on-off valve can automatically open or close with the load changes of the two-way rapid cylinder, realizing automatic switching between light-load fast and heavy-load slow working conditions, solving the contradiction between thrust, speed and power under uneven load operation, realizing heavy-load operation through a simple structure, and avoiding the high energy consumption and high cost problems brought about by complex hydraulic systems such as double pumps.

[0024] 3. This technical solution forms a working space for placing wood between the frame, baffle and wood splitting axe; the power unit provides power for the two-way fast cylinder; the hydraulically controlled one-way valve drives the piston rod to operate quickly in both directions with a smaller hydraulic oil pump flow, thereby reducing the idle waiting time during the operation of the wood splitter and improving work efficiency. The power of the wood splitter is reduced but the work efficiency is improved, which reduces the manufacturing cost, use cost and maintenance cost.

[0025] 4. The hydraulic cylinder body of the present technical solution includes a cylinder body, a cylinder front cover installed on the cylinder body, a cylinder rear cover, two connecting oil pipes, a threaded cover and a control valve; the cylinder steel pipe of the cylinder body is welded to the cylinder rear cover and the two connecting oil pipes as a whole, and the connecting oil pipes are directly inserted into the control valve for installation, which simplifies the installation of the oil pipe joint and reflects the overall integration characteristics; at the same time, the control valve and the cylinder front cover are plate-type connected, which is easy to install and simple to operate, avoiding the cumbersome installation problem between the oil pipe joint and the control valve.

[0026] 5. The wood splitter power unit of the present technical solution is highly integrated, and the oil pump is located in a smaller oil tank, which is integrated with the engine or motor, which can save the number of oil pipes and avoid oil leakage problems at the oil pipe connections; at the same time, since the hydraulic oil flow required by the hydraulic system of the present technical solution is small, the volume of the oil tank can be reduced, and through the design of the adapter plate, the connecting oil pipes of the existing wood splitter are omitted, reducing the occurrence of oil leakage failures, and since the power size of the wood splitter has no direct correlation and restriction relationship with the thrust size and speed, the power unit of the present technical solution can be adapted to wood splitters of various specifications and sizes, thereby saving manufacturing and management costs.

[0027] 6. The main beam of the frame of this technical solution is H-shaped steel, the tail end of the main beam is bent and upturned and inlaid with a tail plate, and the ends of the two-way fast cylinder are installed on the reinforcing plate and the tail plate; compared with the existing wood splitters that are all welded by steel plates, the connection strength is improved, the manufacturing cost is reduced, and the overall cutting and forming of the profile still maintains the coordination and beauty of the whole machine.

[0028] 7. The main beam of the technical solution is provided with a guide rail for the wood splitting axe to slide. The guide rail is formed by bending the upper end of the reinforcing rib plate and placing it above the main beam. Compared with the existing wood splitter using two long steel plates stacked together, the manufacturing cost is reduced.

[0029] 8. A guide plate is provided between the guide rail and the baffle of the technical solution. The guide plate can not only position the wood together with the guide rail, but also be used to guide the falling of the wood chips.

[0030] 9. The wood splitting axe of the present technical solution is in the shape of an S-shaped eagle head, and the eagle head shape can be used to better split the wood; the eagle's beak forms a fixed part and is used to fix the wood, and the first blade corresponding to the concave part of the eagle's beak pulls the wood downward and splits it; especially in the process of splitting the wood, the blade corresponding to the raised part under the eagle's beak is located at the lower edge of the wood, which is more conducive to splitting the wood.

[0031] 10. The front end baffle of the main beam of the present technical solution is provided with a plurality of reinforcing ribs, and the reinforcing ribs are connected end to end to form a reinforcing ring, and the inner walls of the reinforcing ring are connected by reinforcing ribs, thereby improving the anti-deformation ability of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of the technical solution.

[0033] Figure 2 It is a side view of this technical solution.

[0034] Figure 3 This is a structural schematic diagram of the bidirectional fast cylinder of this technical solution.

[0035] Figure 4 This is a cross-sectional view of the bidirectional fast cylinder of this technical solution.

[0036] Figure 5 for Figure 4 Enlarged view of point B in .

[0037] Figure 6 for Figure 4 AA section view.

[0038] Figure 7 This is a schematic diagram of the structure of the power unit of this technical solution.

[0039] Figure 8 This is a partial cross-sectional view of the power unit of this technical solution.

[0040] Fig. 9 This is one of the structural schematic diagrams of the main beam of this technical solution.

[0041] Fig.10 This is the second structural diagram of the main beam of this technical solution.

[0042] Fig.11 This is a side view of the main beam of this technical solution.

[0043] Fig.12 This is a schematic diagram of the structure of the baffle of this technical solution.

[0044] Fig.13 It is the structural schematic diagram of the wood-breaking axe of this technical scheme.

[0045] Fig.14 It is a side view of the wood splitting axe of this technical solution.

[0046] Figure numerals: 1, frame; 11, main beam; 12, tail plate; 13, reinforcement plate; 14, reinforcement rib plate; 15, working space; 16, guide plate; 17, guide rail; 2, baffle; 21, reinforcement rib; 22, reinforcement ring; 23, fixing protrusion; 3, wood splitting axe; 30, fixing part; 31, force-bearing body; 32, guide part 1; 33, blade part; 34, cutting edge; 35, cutting edge; 36, First blade; 37, second blade; 4, bidirectional fast cylinder; 41, hydraulic cylinder body; 411, cylinder body; 412, cylinder front cover; 413, cylinder rear cover; 414, cylinder steel pipe; 415, installation double earrings; 42, large piston; 421, installation cavity; 422, auxiliary piston cavity; 43, piston rod; 441, push rod seat; 4411, first through hole; 4412, control oil hole; 441 3. Guide part 2; 442. Push rod assembly; 4421. Sliding seat; 4422. Push rod body; 4423. Third spring; 4424. Limiting platform; 443. Oil channel; 45. Rod chamber; 46. Rodless chamber; 47. Hydraulic control one-way valve; 471. First steel ball; 472. First spring; 5. Power unit; 51. Engine; 52. Adapter plate; 53. Oil pump; 54. Oil tank; 6. Control unit; 60. Oil circuit board; 601. Third through hole; 61. Control valve; 63. Control handle; 64. Connecting oil pipe; 7. Hydraulic control switch valve; 711. Second through hole; 72. Thrust control push rod valve core; 73. Second steel ball; 74. Second spring; 8. Quick reset unit; 81. Hollow inner pull rod with hole; 82. Small piston; 821. Reset area; 822. Give way area; 9. Wooden pallet. DETAILED DESCRIPTION

[0047] The specific implementation of the technical solution is further described in detail below with reference to the accompanying drawings. Figure 1-Figure 14 .

[0048] A wood splitter, comprising:

[0049] Frame 1, baffle 2, wood splitting axe 3, bidirectional fast oil cylinder 4 and power unit 5;

[0050] A traction unit is arranged on the frame 1; the traction unit comprises a connecting rod, a traction head and two traction chains, one end of the connecting rod is horizontally bolted to the frame 1, and the other end is bolted to the traction head, one end of the traction chain is welded to the connecting rod, and the connection between the traction chain and the connecting rod is arranged close to the traction head.

[0051] The two-way fast oil cylinder 4 is installed on the frame 1, the baffle plate 2 is vertically welded on the frame 1, the wood splitting axe 3 is installed on the piston rod 43 of the two-way fast oil cylinder 4 and can slide on the frame 1, and a working space 15 for placing wood is formed between the frame 1, the baffle plate 2 and the wood splitting axe 3. In order to facilitate the temporary storage of wood, two wood pallets 9 are hingedly installed on the frame 1, and the two wood pallets 9 are respectively located on opposite sides of the working space 15; the power unit 5 is installed on the frame 1, and is used to provide power for the two-way fast oil cylinder 4;

[0052] The power unit 5 includes an engine 51, an adapter plate 52, an oil pump 53 and an oil tank 54; the oil pump 53 is arranged in the oil tank 54 and is integrated with the engine 51 through the adapter plate 52;

[0053] The base of the engine 51 is bolted to the frame 1, one side of the adapter plate 52 in the thickness direction is bolted to the engine 51, and the other side is bolted to the oil pump 53, and the output shaft of the engine 51 passes through the adapter plate 52 and is keyed to the input shaft of the oil pump 53; the oil tank 54 is covered on the outer peripheral side of the oil pump 53, and the oil tank 54 is screwed to the adapter plate 52, and the oil pump 53 is connected to the control unit 6 in turn through the oil circuit and the oil pipeline arranged in the adapter plate 52, and the hydraulic oil is then transported to the reset area 821 or the rodless chamber 46 through the control unit 6.

[0054] The bidirectional fast oil cylinder 4 comprises a hydraulic oil cylinder body 41;

[0055] A large piston 42 is slidably disposed in the hydraulic cylinder body 41 and divides the inner cavity of the hydraulic cylinder body 41 into a rod cavity 45 and a rodless cavity 46;

[0056] The piston rod 43 is telescopically mounted on the hydraulic cylinder body 41, and one end of the piston rod 43 extends into the rod cavity 45 and is connected to the large piston 42, and the other end extends out of the hydraulic cylinder body 41 to form a driving end to connect to the rear end of the wood splitting axe 3;

[0057] A hydraulically controlled one-way valve 47, which is mounted on the large piston 42 and is used to connect the rod chamber 45 and the rodless chamber 46;

[0058] When the oil pump 53 pumps hydraulic oil into the rodless chamber 46 and drives the large piston 42 to move, the volume of the rod chamber 45 decreases as the large piston 42 moves, causing the pressure in the rod chamber 45 to increase, thereby opening the hydraulically controlled one-way valve 47, allowing the hydraulic oil in the rod chamber 45 to enter the rodless chamber 46 through the hydraulically controlled one-way valve 47 and push the large piston 42 to move together with the hydraulic oil pumped in by the oil pump.

[0059] When the bidirectional fast oil cylinder 4 is in light load or no-load condition, the oil pump 53 pumps hydraulic oil into the rodless chamber 46 through the oil inlet pipeline. At this time, the rod chamber 45 is in a fully closed state, and the large piston 42 slides along the hydraulic oil cylinder body 41 to reduce the volume of the rod chamber 45, so that the hydraulic oil pressure in the rod chamber 45 is greater than the hydraulic oil pressure in the rodless chamber 46, and the hydraulically controlled one-way valve 47 automatically opens, and the hydraulic oil in the rod chamber 45 directly enters the rodless chamber 46 through the hydraulically controlled one-way valve 47. At this time, since the hydraulic oil of the increased volume of the rodless chamber 46 comes from both the external oil pump 53 and the rod chamber 45, and about seven times more hydraulic oil comes from the rod chamber 45; compared with conventional oil cylinders, the oil pump 53 only needs to pump less than one-seventh of the flow rate to obtain a faster speed than conventional oil cylinders; realizing piston The rod 43 is pushed out quickly under the drive of a small flow rate; when the piston rod 43 is pushed out, the hydraulic oil in the rod chamber 45 can enter the rodless chamber 46 under light load or no-load conditions through the hydraulically controlled one-way valve 47; when the piston rod 43 is retracted, the hydraulic oil in the rodless chamber 46 can enter the rod chamber 45 through the hydraulically controlled one-way valve 47, thereby realizing the two-way rapid function of pushing out and retracting the piston rod 43 faster with a smaller pumping flow, which sharply reduces the energy consumption of the hydraulic system, achieves environmental protection and energy saving, reduces pollution to the environment, and because the amount of oil pumped in is reduced, the total demand for hydraulic oil is directly reduced, the power of the driving force is greatly reduced, and the transmission and control costs of the hydraulic oil are reduced, thereby greatly reducing the manufacturing cost and use cost of the product.

[0060] The bidirectional fast oil cylinder also includes: a fast reset unit 8, which is used to control the hydraulic oil in the rodless chamber 46 to return to the rod chamber 45 through the hydraulically controlled one-way valve 47; to achieve the fast reset of the piston rod 43, and the fast reset unit 8 includes a hollow inner pull rod 81 with a hole, a small piston 82, a push rod seat 441 and a push rod assembly 442;

[0061] The piston rod 43 is hollow;

[0062] One end of the hollow inner rod 81 with a hole is connected and fixed to the cylinder rear cover 413 of the hydraulic cylinder body 41, and the other end passes through the large piston 42 and extends into the inner cavity of the piston rod 43, and the hollow inner rod 81 with a hole is slidably connected to the large piston 42; the end of the piston rod 43 is internally threaded with a sealing plug, which is sleeved on the outer side of the hollow inner rod 81 with a hole and sealed, and the rear end of the sealing plug has an abutment platform, which movably abuts against the rear ends of the large piston 42 and the piston rod 43, and the sealing plug cooperates with the small piston 82 and the hollow inner rod 81 with a hole to form a reset area 821;

[0063] The large piston 42 is provided with an installation cavity 421, in which a push rod seat 441 and a push rod assembly 442 are provided; an oil channel 443 connected with the rod cavity 45 and the hydraulically controlled one-way valve 47 is formed in the middle of the push rod seat 441 and the push rod assembly 442; the part of the push rod seat 441 adjacent to the hydraulically controlled one-way valve 47 is a guide part 2 4413, and an auxiliary piston cavity 422 is formed between the peripheral side of the guide part 2 4413 and the side wall of the installation cavity 421, one end of the push rod assembly 442 is arranged in the auxiliary piston cavity 422 and forms a piston part, and the other end of the push rod assembly 442 is arranged toward the hydraulically controlled one-way valve 47, and is used for movably abutting against the first steel ball 471;

[0064] The small piston 82 is connected to one end of the hollow inner pull rod 81, and the circumference of the small piston 82 is slidably connected to the inner cavity wall of the piston rod 43. The small piston 82 divides the inner cavity of the piston rod 43 into a reset area 821 and a yield area 822, and the yield area 822 is connected to the outside.

[0065] The reset area 821 is connected to the oil path inside the hollow inner pull rod 81;

[0066] A control oil hole 4412 is provided on the piston rod 43, and the control oil hole 4412 is connected to the reset area 821. The control oil hole 4412 makes the oil circuit between the reset area 821 and the auxiliary piston chamber 422 connected; when the hydraulic oil in the reset area 821 enters the auxiliary piston chamber 422, the push rod assembly 442 drives the first steel ball 471 away from the first through hole 4411, thereby realizing the opening of the hydraulically controlled one-way valve 47.

[0067] The hydraulic oil flows into the hollow inner pull rod 81 and into the reset area 821 through the oil pump 53. The hydraulic oil in the reset area 821 enters the auxiliary piston chamber 422 through the control oil hole 4412 and pushes the push rod assembly 442 to move, thereby controlling the hydraulic control one-way valve 47 to open.

[0068] The oil pump 53 pumps hydraulic oil into the reset area 821 through the hollow inner pull rod 81 with a hole. Since the reset area 821 is connected with the auxiliary piston chamber 422 through the control oil hole 4412, the hydraulic oil in the reset area 821 acts on the push rod assembly 442 and pushes the first steel ball 471, controlling the hydraulic control one-way valve 47 to open. At this time, the rodless chamber 46 and the rod chamber 45 are connected, and the hydraulic oil in the rodless chamber 46 directly returns to the rod chamber 45 through the hydraulic control one-way valve 47, so that the large piston 42 retreats quickly and completes the reset action of the piston rod 43. The designed quick reset unit 8, through the hollow piston rod 43, the hollow inner pull rod 81 with a hole and the small piston 82, constitutes a reset small oil cylinder structure, which can realize the quick reset action of the piston rod 43.

[0069] A control unit 6 is provided on the hydraulic cylinder body 41. The control unit 6 is connected to the power unit 5 through an oil pipeline. The control unit 6 includes a control valve 61, a bounce reset mechanism and a control handle 63. A directional control valve is installed inside the control valve 61 to control the flow of liquid from different channels. The control valve 61 is connected to the cylinder front cover 412 in a plate-type connection. The plate-type connection refers to superimposing and fastening the control valve 61 and the cylinder front cover 412 in a plane to form a compact and orderly whole, which is convenient for installation, maintenance and system integration. Specifically, each control unit (i.e., the control valve 61 and the cylinder front cover 412) is stacked in a plane, that is, stacked and connected layer by layer, so as to realize integration into one. The two mutually close planes of the control valve 61 and the cylinder front cover 412 fit together, and there are through holes in the middle of the two planes and they are aligned and connected with each other.

[0070] The control valve 61 connects the front cover 412 and the rear cover 413 of the cylinder through two connecting oil pipes 64. The flow direction of the hydraulic oil in the connecting oil pipes 64 can be controlled by operating the control handle 63. The bouncing reset mechanism realizes that the control valve handle automatically returns to the middle position when the piston rod 43 is recovered into place during the resetting process of the two-way rapid cylinder 4.

[0071] The design scheme is that the control valve 61 is connected to the cylinder front cover 412 of the hydraulic cylinder body 41 in a plate-type manner, and the control valve 61 and the cylinder rear cover 413 are connected through two connecting oil pipes 64. Then the control valve 61 is connected to the cylinder front cover 412, and the control valve 61 is used to control the connecting oil pipe 64 to supply oil to the rodless chamber 46 or the reset area 821 respectively.

[0072] The hydraulically controlled one-way valve 47 includes a first steel ball 471 and a first spring 472;

[0073] The push rod seat 441 and the push rod assembly 442 are hollow, and a first through hole 4411 is opened on the large piston 42. The rodless chamber 46 communicates with the rod chamber 45 through the first through hole 4411 and along the oil channel 443 of the push rod assembly 442 and the push rod seat 441;

[0074] One end of the first spring 472 is connected to the large piston 42 through a snap ring, and the other end is connected to the first steel ball 471, so as to make the first steel ball 471 block the first through hole 4411;

[0075] The end of the push rod assembly 442 is slidably sleeved on the push rod seat 441, and the push rod seat 441 is used to limit the push rod assembly 442 from being separated from the large piston 42. The push rod assembly 442 is slidably connected in the mounting cavity 421 of the large piston 42, and the push rod body 4422 of the push rod assembly 442 can pass through the first through hole 4411 and abut against the first steel ball 471.

[0076] The push rod assembly 442 can contact the hydraulic oil in the reset area 821. When the oil pressure is applied, the hydraulic oil in the reset area 821 pushes the push rod assembly 442 to abut and push open the first steel ball 471 through the control oil hole 4412, so that the first steel ball 471 no longer blocks the first through hole 4411, so as to realize the connection between the rod chamber 45 and the rodless chamber 46.

[0077] During light load operation, the oil pump 53 continuously pumps hydraulic oil into the rodless chamber 46. The hydraulic oil pressure in the rodless chamber 46 increases and a thrust is applied to the large piston 42. Since the rod chamber 45 is sealed at this time, the hydraulic oil pressure in the rod chamber 45 increases rapidly, and the hydraulic oil in the rod chamber 45 directly pushes the first steel ball 471 away. The first steel ball 471 no longer blocks the first through hole 4411. The rod chamber 45 and the rodless chamber 46 are connected through the first through hole 4411. The hydraulic oil in the rod chamber 45 directly enters the rodless chamber 46 through the first through hole 4411. Since most of the hydraulic The oil is the hydraulic oil that is replenished from the rod chamber 45 to the rodless chamber 46. The oil pump 53 only needs a very small flow rate to obtain a faster ejection speed and, when the piston rod 43 is reset, the hydraulic oil in the reset area 821 pushes the push rod assembly 442 to move, the push rod assembly 442 pushes the first steel ball 471 to move, the first through hole 4411 opens, and the hydraulic oil in the rodless chamber 46 enters the rod chamber 45 through the first through hole 4411 to complete the rapid reset; the designed hydraulically controlled one-way valve 47 can realize a small flow drive under light load conditions to achieve high-speed ejection and rapid reset.

[0078] The push rod assembly 442 includes: a sliding seat 4421, a push rod body 4422 and a third spring 4423;

[0079] The sliding seat 4421 is slidably sleeved on the push rod seat 441, and the rear half of the sliding seat 4421 is slidably set in the auxiliary piston chamber 422 to form a piston part, the push rod body 4422 is slidably set in the front half of the sliding seat 4421, and one end of the push rod body 4422 movably abuts against the limit platform 4424 in the sliding seat 4421, and the other end passes through the first through hole 4411 and abuts against the first steel ball 471; one end of the third spring 4423 movably abuts against the push rod body 4422, and the other end movably abuts against the edge of the first through hole 4411, which is used to make the push rod body 4422 have a movement tendency away from the first steel ball 471, thereby realizing the resetting of the push rod assembly 442.

[0080] A hydraulically controlled switch valve 7 is integrated on the control unit 6 or the front cover 412 of the oil cylinder. When the hydraulic oil pressure in the rodless chamber 46 reaches a set value P, the hydraulically controlled switch valve 7 connects the rod chamber 45 with the oil return line.

[0081] Under heavy-load working conditions, since the piston rod 43 is subjected to greater force, the oil pump 53 continuously pumps hydraulic oil into the rodless chamber 46, causing the hydraulic oil pressure in the rodless chamber 46 to continuously increase, thereby causing the thrust on the large piston 42 to gradually increase. Until the hydraulic oil pressure in the rodless chamber 46 reaches P, the control unit 6 or the hydraulically controlled switching valve 7 on the cylinder front cover 412 opens under the action of the hydraulic oil pressure in the rodless chamber 46, causing the rod chamber 45 to be connected to the return oil pipeline. The originally closed rod chamber 45 is suddenly connected to the return oil pipeline, and the hydraulic oil pressure in the rod chamber 45 can be regarded as instantly dropping to 0. At this time, the oil pressure in the rodless chamber 46 is greater than the oil pressure in the rod chamber 45, and the hydraulically controlled one-way valve 47 on the large piston 42 opens. It closes automatically and immediately, and the high-pressure hydraulic oil in the rodless chamber 46 all acts on the large piston 42, generating the same huge thrust as a conventional oil cylinder to complete heavy-load operations; the designed hydraulic switch valve 7 can control the flow direction of the hydraulic oil in the rod chamber 45. When the system oil pressure reaches the set pressure, the hydraulic switch valve 7 automatically opens, so that the hydraulic oil in the rod chamber 45 is connected to the oil tank 54. It can cooperate with the hydraulic one-way valve 47 to complete the automatic switching of light-load and heavy-load working conditions, fundamentally solving the contradiction between thrust, speed and driving power under uneven load working conditions, achieving heavy-load operations through a simple structure, and reducing the high manufacturing costs caused by the use of complex hydraulic systems such as double pumps.

[0082] A second through hole 711 is formed on the oil cylinder front cover 412, and the rod chamber 45 and the oil return pipeline are connected through the second through hole 711;

[0083] The control valve 61 is connected to an oil circuit board 60, which is mounted on the oil cylinder front cover 412, and a third through hole 601 is provided on the oil circuit board 60, through which the oil return line and the second through hole 711 are communicated;

[0084] The oil cylinder rear cover 413 is connected to the oil circuit board 60 through two connecting oil pipes 64, and the connecting oil pipes 64 connected to the oil circuit board 60 are controlled by the control valve 61 to communicate with the rodless chamber 46 or the reset area 821;

[0085] The hydraulically controlled switch valve 7 includes: a thrust control push rod valve core 72, a second steel ball 73 and a second spring 74; one end of the second spring 74 is packaged in the oil circuit board 60 by a screw, and the other end is connected to the second steel ball 73, so that the second steel ball 73 blocks the third through hole 601;

[0086] The thrust control push rod valve core 72 is slidably connected in the oil circuit board 60 , and the push rod of the thrust control push rod valve core 72 can pass through the third through hole 601 and abut against the second steel ball 73 .

[0087] The hydraulically controlled switch valve 7 can be integrated into the control unit 6 or the cylinder front cover 412, that is, the oil circuit plate 60 can be integrated with the control valve 61 and then installed on the cylinder front cover 412, or the oil circuit plate 60 can be directly designed as an integral part of the cylinder front cover 412, and then the control valve 61 is connected to the cylinder front cover 412 in a plate-type manner.

[0088] Under heavy-load working conditions, the piston rod 43 initially remains stationary, and the oil pump 53 continues to pump hydraulic oil into the rodless chamber 46. The oil pressure in the rodless chamber 46 continues to increase to the set value P, and the rodless chamber 46 is connected to the force chamber of the thrust control push rod valve core 72 through the oil circuit (that is, the oil circuit plate 60 and the rodless chamber 46 are connected by a connecting oil pipe 64, and the connecting oil pipe 64 can be used to supply oil to the rodless chamber 46, and can in turn transport the hydraulic oil in the rodless chamber 46 to the oil circuit plate 60 and apply force to the thrust control push rod valve core 72, or the rodless chamber 46 is connected through a new connecting oil pipe 64 to realize the hydraulic oil in the rodless chamber 46 to the thrust control push rod valve Core 72 applies force), at this time, the thrust control push rod valve core 72 applies force to the second steel ball 73 under the action of the hydraulic oil pressure of the rodless chamber 46, so that the second steel ball 73 overcomes the elastic force of the second spring 74, and the third through hole 601 is opened and connected with the second through hole 711. At this time, the rod chamber 45 is connected with the return oil pipeline, and the hydraulic oil pressure in the rod chamber 45 drops rapidly. The hydraulically controlled one-way valve 47 on the large piston 42 is immediately closed automatically, and the high-pressure oil in the rodless chamber 46 all acts on the large piston 42, generating huge thrust to complete the heavy-load operation. The designed hydraulically controlled switch valve 7 can cooperate with the hydraulically controlled one-way valve 47 to realize the automatic switching between heavy-load operation conditions and light-load operation conditions.

[0089] The hydraulic cylinder body 41 includes a cylinder body 411, a cylinder front cover 412 mounted on the cylinder body 411, a cover, and a control valve 61 connected to the cylinder front cover 412 in a plate-type manner. The cover is used to connect and fix the cylinder body 411 to the cylinder front cover 412; the cylinder body 411 includes: a cylinder steel pipe 414 and a cylinder rear cover 413. The cylinder steel pipe 414, the cylinder rear cover 413 and two connecting oil pipes 64 are welded together. A double earring 415 is welded on the cylinder rear cover 413, and the oil The cylinder rear cover 413 is provided with an push-out oil hole connecting the rodless chamber 46 and the control valve 61, and a retraction oil hole connecting the hollow inner pull rod 81 with a hole and the control valve 61; the push-out oil hole and the retraction oil hole are respectively connected to a connecting oil pipe 64, and the control valve 61 is operated to allow the hydraulic oil to enter the rodless chamber 46 or the hollow inner pull rod 81 with a hole in turn through the oil circuit plate 60 and the connecting oil pipe 64. During installation, the two connecting oil pipes 64 are directly inserted into the control valve 61.

[0090] The oil delivery pipeline includes an oil inlet pipeline and an oil return pipeline. The oil return pipeline is used for the hydraulic oil to flow back to the oil tank 54; the oil inlet pipeline is used for the hydraulic oil to flow into the oil circuit board 60, and then the oil circuit board 60 distributes the hydraulic oil to the rodless chamber 46 or the reset area 821.

[0091] The oil inlet end of the oil pump 53 allows the hydraulic oil in the oil tank 54 to enter the oil pump 53 through the oil pipe, and the oil outlet end of the oil pump 53 is connected to the adapter plate 52 through the oil circuit. The adapter plate 52 and the oil tank 54 are connected through the oil circuit to realize the hydraulic oil returning from the adapter plate 52 to the oil tank 54.

[0092] The frame 1 has a main beam 11, the base (i.e., the whole) of the main beam 11 is an H-shaped steel, and the main beam 11 is formed by cutting the whole profile. Compared with the main beam 11 formed by welding three traditional plates, the present design reduces the processing steps of the main beam 11, and the overall forming of the main beam 11 can improve the bearing capacity; the cross section of the main beam 11 is H-shaped; the tail end of the main beam 11 is bent and warped, and the tail end of the main beam 11 is inlaid and welded with a tail plate 12, and reinforcement plates are arranged on both sides of the tail plate 12 13, the ends of the two-way fast oil cylinder 4 are installed on the reinforcing plate 13 and the tail plate 12, and the mounting double earrings 415 of the two-way fast oil cylinder 4 are hinged on the tail plate 12 and the reinforcing plate 13; a mounting groove is firstly opened at the tail end of the main beam 11, and the tail plate 12 is vertically embedded in the mounting groove, and then fixed by welding, the upper end of the tail plate 12 protrudes from the upper end of the main beam 11, the two sides of the tail plate 12 are welded to the side walls of the mounting groove, and the front end of the tail plate 12 is abutted against the bottom of the mounting groove and welded together;

[0093] When the bidirectional fast oil cylinder 4 performs wood splitting operation, the tail plate 12 is subjected to excessive force due to the backward movement of the reaction force. The tail plate 12 only needs to be made of metal materials such as steel, thereby improving the bearing capacity and reducing the production cost.

[0094] Reinforcing ribs 14 are provided on both sides of the main beam 11. The upper ends of the reinforcing ribs 14 are bent and placed above the main beam 11. A gap is left between the bent portion of the upper end of the reinforcing ribs 14 and the upper end of the main beam 11 for the guide part 32 to slide (that is, the bottom of the guide part 32 is slidably set on the upper end of the main beam 11, the reinforcing ribs 14 first wrap the side walls of the guide part 32, and then the upper ends of the reinforcing ribs 14 are bent and placed on the upper end of the guide part 32), thereby forming a guide rail 17 for the wood splitting axe 3 to slide. The guide rail 17 is used to limit the wood located in the working space 15, to ensure the stability of the wood when it is split or moved, and to ensure the removal of wood chips.

[0095] Guide plates 16 are obliquely arranged on both sides of the main beam 11, that is, the upper ends of the guide plates 16 are bent toward the direction away from the upper end of the main beam 11, and the guide plates 16 are located between the guide rails 17 and the baffle 2. While the guide plates 16 and the guide rails 17 position the wood, the guide plates 16 can smoothly remove the residual wood chips.

[0096] A side of the baffle plate 2 away from the wood splitting axe 3 is provided with a plurality of reinforcing ribs 21, and the plurality of reinforcing ribs 21 are connected end to end and welded at the connection points to form a reinforcing ring 22, and the inner walls of the reinforcing ring 22 are again connected by welding with the reinforcing ribs 21, thereby improving the bearing capacity of the baffle plate 2; a side of the baffle plate 2 close to the wood splitting axe 3 is provided with a plurality of fixing protrusions 23 for fixing the end of the wood.

[0097] The wood splitting axe 3 is in an S-shaped eagle head shape, and includes a force-bearing body 31, a guide part 32 and a blade part 33; the guide part 32 is located at the lower side of the force-bearing body 31 and the blade part 33 and is arranged horizontally, the force-bearing body 31 is arranged vertically above the guide part 32, and the blade part 33 is arranged on the side of the force-bearing body 31 away from the two-way fast oil cylinder 4, and the front end of the blade part 33 is provided with a cutting edge 34;

[0098] The upper side of the cutting edge 34 is provided with a fixing portion 30, and the fixing portion 30 is used to fix the wood; the lower half of the cutting edge 34 is provided with a knife edge portion 35, and the knife edge portion 35 is used to split the wood;

[0099] The fixing portion 30 is further away from the two-way quick cylinder 4 than the blade portion 35; an arc-shaped concave first blade portion 36 is formed between the fixing portion 30 and the blade portion 35; the first blade portion 36 will pull the wood downward after the fixing portion 30 is positioned, further stabilizing the wood, and its role is particularly prominent when the wood is split into two and then into four during the splitting process. When the blade portion 35 is located close to the outer periphery of the wood, it is more conducive to breaking the wood; a second blade portion 37 inclined inwardly is formed on its lower side.

[0100] The wood to be chopped is placed in the working space 15 formed by the frame 1, the baffle 2 and the wood splitting axe 3. Before the wood splitting axe 3 touches the wood and after the moment when the wood needs to be split vigorously, the oil cylinder is in a light load or no-load condition, and the power unit 5 pumps hydraulic oil into the rodless chamber 46. The hydraulically controlled one-way valve 47 opens automatically, and the hydraulic oil in the rod chamber 45 directly enters the rodless chamber 46 through the hydraulically controlled one-way valve 47. At this time, the hydraulic oil required for the increase in the volume of the rodless chamber 46 comes from both the external oil pump 53 and the rod chamber 45, and most of it comes from the rod chamber 45. Compared with conventional oil cylinders, a faster piston rod 43 ejection speed is achieved, and the waiting time for the wood splitting axe 3 to touch the wood again after resetting is reduced, thereby improving the working efficiency of the wood splitter, and sharply reducing the energy consumption of the hydraulic system, thereby achieving environmental protection and energy saving, and reducing pollution to the environment. In addition, since the amount of oil pumped in is reduced, the total demand for hydraulic oil is directly reduced, and the transmission and control costs of hydraulic oil are also reduced, thereby reducing the manufacturing cost and use cost of the product.

[0101] After the wood-breaking axe 3 touches the wood, the hydraulic cylinder body 41 automatically switches to the heavy-load working condition. Since the piston rod 43 is subjected to a large force, the power unit 5 continues to pump the hydraulic oil 53 into the rodless chamber 46, so that the hydraulic oil pressure in the rodless chamber 46 continues to increase, and then the thrust borne by the large piston 42 gradually increases. Until the hydraulic oil pressure in the rodless chamber 46 reaches the set value P, the hydraulically controlled switch valve 7 on the cylinder front cover 412 opens under the action of the hydraulic oil pressure in the rodless chamber 46, so that the rod chamber 45 is connected to the oil return pipeline. The originally closed rod chamber 45 is suddenly connected to the oil return pipeline, and the hydraulic oil pressure in the rod chamber 45 can be regarded as instantly dropped to 0. At this time, the oil in the rodless chamber 46 When the oil pressure in the rod chamber 45 is greater than that in the rod chamber 45, the hydraulically controlled one-way valve 47 on the large piston 42 is automatically closed immediately, and the high-pressure hydraulic oil in the rodless chamber 46 all acts on the large piston 42, generating a huge thrust, instantly splitting the wood to complete the heavy-load operation. After splitting, its load drops sharply and instantly converts to a light-load operation condition. The piston rod 43 is quickly pushed out to complete the wood splitting operation. The designed hydraulically controlled switch valve 7 can automatically switch between light-load and heavy-load working conditions by cooperating with the hydraulically controlled one-way valve 47, so that the oil cylinder has both a fast speed and a huge thrust under a small power drive; fundamentally solves the contradiction between thrust, speed and driving power under uneven load working conditions.

[0102] The designed quick reset unit 8 can realize the quick reset action of the piston rod 43, reduce the waiting time for the wood splitting axe 3 to reset, and further improve the working efficiency of the wood splitter.

[0103] The engine 51 provides power for the oil pump 53, and the oil pump 53 draws hydraulic oil from the oil tank 54 and in turn draws it into the rodless chamber 46 through the adapter plate 52 and the oil inlet pipeline to complete the extension of the piston rod 43 and the wood splitting operation. After the wood splitting operation is completed, the oil pump 53 draws hydraulic oil into the cavity of the hollow inner pull rod 81 with a hole to complete the reset action of the piston rod 43; the designed power unit 5 can reduce the volume of the oil tank 54 due to the small hydraulic oil flow required by the hydraulic system, and through the design of the adapter plate 52, many connecting oil pipes 64 of the existing wood splitter are eliminated, reducing many hidden dangers of possible oil leakage failures, and because the power size of the wood splitter has no direct correlation and restriction relationship with the thrust size and speed, the power unit 5 of the present application can be used for wood splitters of various specifications and sizes, thereby saving manufacturing and management costs.

[0104] The designed control unit 6 and connecting oil pipe 64 are highly integrated with the hydraulic cylinder body 41, making the product structure compact and beautiful, while reducing the manufacturing cost and the quality risk of oil leakage in the hydraulic system.

[0105] The working principle of this design is as follows: the wood to be chopped is placed on the wood pallet 9, and then a piece of wood is allowed to enter the working space 15. The control handle 63 is used to drive the engine 51 to drive the oil pump 53 to pump out high-pressure oil, which enters the rodless chamber 46 through the adapter plate 52, the oil inlet pipe, the oil circuit board 60 and the connecting oil pipe 64 in turn. Due to the small external load, the hydraulic oil pumped into the rodless chamber 46 increases the oil pressure of the rodless chamber 46, and the hydraulic oil in the rodless chamber 46 pushes the large piston 42 to slide. At this time, the rod chamber 45 is completely closed, and the hydraulic oil pressure in the rod chamber 45 increases rapidly until the hydraulic oil in the rod chamber 45 is The pressure is greater than the pressure of the hydraulic oil in the rodless chamber 46. The oil pressure in the rod chamber 45 acts on the first steel ball 471 and overcomes the elastic force of the first spring 472 to push the first steel ball 471 away. The first through hole 4411 opens. At this time, the hydraulic oil in the rod chamber 45 directly enters the rodless chamber 46 through the first through hole 4411. Since most of the hydraulic oil in the rodless chamber 46 comes from the rod chamber 45, the oil pump flow only needs to be equivalent to one-seventh of the flow of a conventional oil cylinder to obtain a faster ejection speed than a conventional oil cylinder; therefore, a small flow is driven to quickly eject the piston rod 43 until the wood splitting axe 3 touches the wood.

[0106] When the wood splitting axe 3 comes into contact with the wood, the oil pump 53 continues to pump hydraulic oil into the rodless chamber 46. Due to the heavy load, the piston rod 43 and the large piston 42 remain stationary until the hydraulic oil pressure in the rodless chamber 46 rises to the set value P. At this time, the hydraulic oil in the rodless chamber 46 passes through the oil circuit (i.e., the oil circuit connecting the oil pipe 64 and the oil circuit board 60) and in turn applies force to the thrust control push rod valve core 72 in the oil circuit board 60. The thrust control push rod valve core 72 applies force to the second steel ball 73, so that the second steel ball 73 overcomes the elastic force of the second spring 74 and no longer blocks the third through hole 601. The rod chamber 45 and the return oil pipeline are connected through the third through hole 601 and the second through hole 711, and the hydraulic oil pressure in the rod chamber 45 decreases rapidly. At this time, the hydraulic oil pressure in the rodless chamber 46 is greater than that in the rod chamber The hydraulic oil pressure in the cavity 45, the hydraulically controlled one-way valve 47 on the large piston 42 is automatically closed immediately, and the high-pressure hydraulic oil in the rodless cavity 46 all acts on the large piston 42, generating a huge thrust, and the wood-breaking axe 3 splits the wood. When the wood is split instantly, the load of the oil cylinder immediately decreases, and the oil pressure in the rodless cavity 46 drops accordingly. The hydraulic pressure on the thrust control push rod valve core 72 is less than the elastic force of the second spring 74, and the second steel ball 73 is immediately reset to close the second through hole; so that the rod cavity 45 is in a closed state again. Once the rod cavity 45 is closed, its oil pressure immediately rises and exceeds the pressure of the rodless cavity 46, directly pushing open the first steel ball 471, so that the hydraulic oil in the rod cavity 45 all flows into the rodless cavity 46, quickly pushing out the piston rod 43 completely, and completely splitting the wood.

[0107] After the wood is completely split, the piston rod 43 needs to be reset. At this time, the control handle 63 is manipulated so that the engine 51 drives the oil pump 53 to pump out the high-pressure oil through the adapter plate 52 and the oil inlet pipeline into the inner cavity of the hollow inner pull rod 81 and enters the reset area 821, and then the piston rod 43 and the large piston 42 are quickly pulled back under the action of the hydraulic oil. At this time, the hydraulic oil in the reset area 821 applies force to the push rod assembly 442 through the control oil hole 4412, so that the push rod assembly 442 pushes the first steel ball 471 to move. The first steel ball 471 overcomes the elastic force of the first spring 472 and no longer blocks the first through hole 4411. The hydraulic oil in the rodless cavity 46 directly enters the rod cavity 45 through the first through hole 4411, and the piston rod 43 drives the wood splitting axe 3 to reset smoothly and rapidly.

[0108] The above shows and describes the basic principle and main features of the technical solution and the advantages of the technical solution. The technicians in this industry should understand that the technical solution is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the technical solution. Without departing from the spirit and scope of the technical solution, the technical solution will have various changes and improvements, which fall within the scope of the technical solution to be protected. The scope of protection claimed by the technical solution is defined by the attached claims and their equivalents.

[0109] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this technical solution, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by this technical solution, should still fall within the scope of the technical content disclosed by this technical solution. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this technical solution. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of this technical solution without substantially changing the technical content.

[0110] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0111] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

Claims

1. A wood splitter, characterized in that: include: A frame (1) for loading a bidirectional fast oil cylinder (4), a wood splitting axe (3) and a power unit (5); A baffle (2) mounted on the frame (1); A wood splitting axe (3) is slidably arranged on the frame (1), and the wood splitting axe (3) is installed on the driving end of the bidirectional fast oil cylinder (4); a working space (15) for placing wood is formed between the baffle plate (2) and the wood splitting axe (3); A bidirectional fast oil cylinder (4), which is mounted on the frame (1) and connected to the wood splitting axe (3); A power unit (5) for providing oil pressure to the bidirectional fast oil cylinder (4); The bidirectional fast oil cylinder (4) comprises: Hydraulic cylinder body (41); A large piston (42) is slidably disposed in the hydraulic cylinder body (41) and divides the inner cavity of the hydraulic cylinder body (41) into a rod cavity (45) and a rodless cavity (46); A piston rod (43) is telescopically mounted on the hydraulic cylinder body (41), and the end of the piston rod (43) extends into the rod cavity (45) and is connected to the large piston (42); A hydraulically controlled one-way valve (47), which is mounted on the large piston (42) and is used to connect the rod chamber (45) and the rodless chamber (46); A quick reset unit (8) for controlling the hydraulic oil in the rodless chamber (46) to return to the rod chamber (45) through the hydraulically controlled one-way valve (47); When the hydraulic oil enters the rodless chamber (46) from the oil pump (53) and drives the large piston (42) to move, the oil pressure in the rod chamber (45) increases and causes the hydraulically controlled one-way valve (47) to open, thereby allowing the hydraulic oil in the rod chamber (45) to enter the rodless chamber (46) through the hydraulically controlled one-way valve (47) and drive the large piston (42) to move.

2. A wood splitter according to claim 1, characterized in that: The wood splitting axe (3) is in an S-shaped eagle head shape, and comprises a force-bearing body (31), a guide part (32) and a blade part (33); the guide part (32) is located below the force-bearing body (31) and the blade part (33) and is arranged horizontally, the force-bearing body (31) is arranged vertically above the guide part (32), the blade part (33) is arranged on a side of the force-bearing body (31) away from the two-way fast oil cylinder (4), and a cutting edge (34) is arranged at the front end of the blade part (33); The upper side of the cutting edge (34) is provided with a fixing portion (30), and the fixing portion (30) is used to fix the wood; the lower half of the cutting edge (34) is provided with a knife edge portion (35), and the knife edge portion (35) is used to split the wood; The fixing portion (30) is further away from the bidirectional fast oil cylinder (4) than the blade portion (35); an arc-shaped concave first blade portion (36) is formed between the fixing portion (30) and the blade portion (35); and an inwardly inclined second blade portion (37) is formed on the lower side of the blade portion (35).

3. A wood splitter according to claim 1, characterized in that: The frame (1) has a main beam (11), the main beam (11) base is an H-shaped steel material, the tail end of the main beam (11) is bent and warped, and a tail plate (12) is inlaid and welded at the tail end of the main beam (11), reinforcing plates (13) are arranged on both sides of the tail plate (12), and the ends of the bidirectional fast oil cylinder (4) are installed on the reinforcing plates (13) and the tail plate (12).

4. A wood splitter according to claim 3, characterized in that: Both sides of the main beam (11) are provided with reinforcing rib plates (14), the upper ends of the reinforcing rib plates (14) are bent and placed above the main beam (11) to form guide rails (17) for the wood splitting axe (3) to slide, and both sides of the main beam (11) are provided with guide plates (16) in an inclined manner, the guide plates (16) are located between the guide rails (17) and the baffle (2), and the guide plates (16) are used for the wood fence to fall from the upper end of the main beam (11).

5. A wood splitter according to claim 3, characterized in that: A plurality of reinforcing ribs (21) are provided on the side of the baffle (2) at the front end of the main beam (11) away from the wood splitting axe (3), and the plurality of reinforcing ribs (21) are connected end to end and welded to form a reinforcing ring (22), and reinforcing ribs (21) are welded between the inner walls of the reinforcing ring (22).

6. A wood splitter according to claim 1, characterized in that: The power unit (5) comprises an engine (51), an adapter plate (52), an oil pump (53) and an oil tank (54); the oil pump (53) is arranged in the oil tank (54) and is integrated with the engine (51) through the adapter plate (52); The engine (51) is connected to the frame (1); One side of the adapter plate (52) is connected to the engine (51), and the other side is connected to the oil pump (53); The oil tank (54) is covered on the outer peripheral side of the oil pump (53), and the oil tank (54) is connected to the adapter plate (52); The oil pump (53) sequentially delivers hydraulic oil to the hydraulic cylinder body (41) through the adapter plate (52) and the oil delivery pipeline.

7. A wood splitter according to claim 1, characterized in that: A control unit (6) is provided on the hydraulic cylinder body (41), and the control unit (6) is connected to the power unit (5) through an oil pipeline. The control unit (6) includes a control valve (61); the control valve (61) is plate-connected to the cylinder front cover (412) of the hydraulic cylinder body (41), and the control valve (61) and the cylinder rear cover (413) of the hydraulic cylinder body (41) are connected through two connecting oil pipes (64), and the control valve (61) is used to control the connecting oil pipe (64) to supply oil to the rodless chamber (46) or the reset area (821) of the quick reset unit (8) respectively.

8. A wood splitter according to claim 7, characterized in that: The control unit (6) or the oil cylinder front cover (412) is integrated with a hydraulically controlled switch valve (7), and when the hydraulic oil pressure in the rodless chamber (46) reaches a set value P, the hydraulically controlled switch valve (7) enables the rod chamber (45) to communicate with the oil return pipeline; A second through hole (711) is provided on the oil cylinder front cover (412), and the rod chamber (45) and the oil return pipeline are connected through the second through hole (711); The control valve (61) is connected to an oil circuit board (60), the oil circuit board (60) is mounted on the oil cylinder front cover (412), and a third through hole (601) is provided on the oil circuit board (60), and the oil return pipeline and the second through hole (711) are connected through the third through hole (601); The hydraulically controlled switch valve (7) comprises: a thrust control push rod valve core (72), a second steel ball (73) and a second spring (74); one end of the second spring (74) is connected to the oil circuit board (60), and the other end is connected to the second steel ball (73), so as to enable the second steel ball (73) to block the third through hole (601); The thrust control push rod valve core (72) is slidably connected in the oil circuit plate (60), and the push rod of the thrust control push rod valve core (72) can pass through the third through hole (601) and abut against the second steel ball (73).

9. A wood splitter according to claim 7, characterized in that: The hydraulic cylinder body (41) comprises a cylinder body (411), a cylinder front cover (412) mounted on the cylinder body (411), a sealing cover, and a control valve (61) connected to the cylinder front cover (412) in a plate-type manner; The cylinder body (411) comprises: a cylinder steel pipe (414) and a cylinder rear cover (413); the cylinder steel pipe (414), the cylinder rear cover (413) and two connecting oil pipes (64) are welded together, and the cylinder rear cover (413) is provided with an ejection oil hole connecting the rodless chamber (46) and the control valve (61), and a retraction oil hole connecting the hollow inner pull rod (81) with a hole of the quick reset unit (8) and the control valve (61); the two connecting oil pipes (64) are inserted into the control valve (61).

10. A wood splitter according to claim 1, characterized in that: The quick reset unit (8) comprises a hollow inner pull rod (81) with a hole, a small piston (82), a push rod seat (441) and a push rod assembly (442); The piston rod (43) is hollow; One end of the hollow inner pull rod (81) with a hole is connected to the cylinder rear cover (413) of the hydraulic cylinder body (41), and the other end passes through the large piston (42) and extends into the inner cavity of the piston rod (43), and the hollow inner pull rod (81) with a hole is slidably connected to the large piston (42); The large piston (42) is provided with an installation cavity (421), and a push rod seat (441) and a push rod assembly (442) are provided in the installation cavity (421); an oil channel (443) communicating with the rod cavity (45) and the hydraulically controlled one-way valve (47) is formed in the middle of the push rod seat (441) and the push rod assembly (442); the portion of the push rod seat (441) adjacent to the hydraulically controlled one-way valve (47) is a guide portion 2 (4413), and an auxiliary piston cavity (422) is formed between the peripheral side of the guide portion 2 (4413) and the side wall of the installation cavity (421); one end of the push rod assembly (442) is arranged in the auxiliary piston cavity (422) and forms a piston portion, and the other end of the push rod assembly (442) faces the hydraulically controlled one-way valve (47); The small piston (82) is connected to one end of the hollow inner pull rod (81) with a hole, and the circumference of the small piston (82) is slidably connected to the inner cavity wall of the piston rod (43), and the small piston (82) divides the inner cavity of the piston rod (43) into a reset area (821) and a yield area (822); The reset area (821) is in communication with the oil path inside the hollow inner pull rod (81); The piston rod (43) is provided with a control oil hole (4412), the control oil hole (4412) is in communication with the reset area (821), and the control oil hole (4412) enables the oil circuit between the reset area (821) and the auxiliary piston chamber (422) to be in communication; when the hydraulic oil in the reset area (821) enters the auxiliary piston chamber (422), the push rod assembly (442) drives the hydraulically controlled one-way valve (47) to open.

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