阅读说明：本技术 一种直流劈柴机 (Direct current firewood chopping machine ) 是由 刘楷 唐以刚 陈林淼 曾玉山 陈伟 储玉凯 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种直流劈柴机,包括动力工作部和供电模块,动力工作部包括机架、连接在机架上的固定刀头和液压推杆,液压推杆的输出端连接有活动刀头,机架上还连接有直流电机；供电模块通过固定支架连接在机架上,供电模块的输出电压不高于60V；供电模块向直流电机供电,直流电机驱动高压油泵以带动液压推杆上连接的活动刀头运动完成劈柴。本申请使用时可随意移动其位置完成劈柴工作,不受市电供电范围影响,提高了劈柴机的工作范围；本申请设计的供电模块的输出电压不高于60V,相较于传统市电的电压,降低了劈柴机的输出电压,保证了使用的安全。(The invention discloses a direct-current firewood splitting machine which comprises a power working part and a power supply module, wherein the power working part comprises a rack, a fixed cutter head and a hydraulic push rod, the fixed cutter head and the hydraulic push rod are connected to the rack; the power supply module is connected to the rack through the fixed support, and the output voltage of the power supply module is not higher than 60V; the power supply module supplies power to the direct current motor, and the direct current motor drives the high-pressure oil pump to drive the movable cutter head connected to the hydraulic push rod to move so as to finish firewood chopping. When the chopping machine is used, the position of the chopping machine can be moved randomly to finish chopping firewood, the chopping machine is not influenced by the range of mains supply, and the working range of the chopping machine is enlarged; the power supply module's of this application design output voltage is not higher than 60V, compares in the voltage of traditional commercial power, has reduced the output voltage of wood splitting machine, has guaranteed the safety of using.)

1. The direct-current wood splitting machine is characterized by comprising a power working part (3) and a power supply module (1), wherein the power working part comprises a rack, a fixed cutter head (35) and a hydraulic push rod (33) which are connected to the rack, the output end of the hydraulic push rod (33) is connected with a movable cutter head (34), and the rack is also connected with a direct-current motor (31);

the power supply module (1) is connected to the rack through a fixing support (2), and the output voltage of the power supply module (1) is not higher than 60V;

the power supply module (1) supplies power to the direct current motor (31), and the direct current motor (31) drives the high-pressure oil pump (32) to drive the movable cutter head (34) connected to the hydraulic push rod (33) to move to finish firewood chopping.

2. The dc log splitter according to claim 1, wherein the power supply of the power supply module (1) comprises one battery pack (13) or a plurality of battery packs (13) connected in series or a plurality of battery packs (13) connected in parallel.

3. The direct current firewood chopping machine according to claim 1, characterized in that the power supply module (1) comprises a battery pack (13) for supplying power to the direct current motor (31), the battery pack (13) supports continuous 50A constant current discharge, and the discharge time is not less than 50 s;

the battery pack (13) is provided with primary current protection and secondary current protection, the current interval of the primary current protection is 50-60A, and the current interval of the secondary current protection is 70-80A.

4. The dc log splitter as claimed in claim 3, wherein the power supply module (1) further comprises a controller (11) connected to the battery pack (13), the controller (11) being configured to limit a discharge current of the battery pack (13).

5. The direct current log splitter according to claim 3, wherein the power supply module (1) further comprises a controller (11) connected to the battery pack (13), and the controller (11) sets the continuous output time of the maximum discharge current to be not less than 2 s.

6. The direct current firewood chopping machine according to claim 3, characterized in that the power supply module (1) further comprises a controller (11) connected to the battery pack (13), the controller (11) is further connected with a signal switch (12), the battery pack (13) is connected with the direct current motor (31) through the controller (11), and the signal switch (12) is used for controlling the direct current motor (31) to be powered on and off.

7. The direct current firewood chopping machine according to claim 3, wherein one or more of an overcharge protection module, an overdischarge protection module, a charge-discharge short circuit protection module and an overheat protection module are arranged in the battery pack (13).

8. The direct current firewood chopping machine according to claim 1, characterized in that the power supply module (1) comprises a battery pack (13) and a battery compartment cover, the battery pack (13) is detachably connected in the battery compartment cover, and the battery compartment cover is connected with the fixed bracket (2).

Technical Field

The invention relates to the technical field of wood splitting machines, in particular to a direct-current wood splitting machine.

Background

Most of the current market firewood splitting machines are connected with an alternating current commercial power not lower than 110V to work, certain risks exist in comparison with a direct current power supply below 60V, and the working range is limited by the length of a wired cable and limited to a certain extent. In addition, the technical requirements of the low-voltage direct-current wood splitting machine are higher compared with the traditional low-voltage tool. The technical key points of how to perform large-current continuous discharge on the battery pack, how to select a reliable power device for the controller to meet the requirements of high-power output when the wood splitting machine works, how to set overload protection of the controller and the like are integrated, and the design difficulty of the low-voltage direct-current wood splitting machine is invisibly improved.

Disclosure of Invention

The invention aims to provide a direct-current wood splitting machine, which solves the problems that the safety of the wood splitting machine using high-voltage mains supply is poor and the working range of the mains supply connected by a connecting cable is restricted in the prior art.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

a direct-current firewood splitting machine comprises a power working part and a power supply module, wherein the power working part comprises a rack, a fixed cutter head and a hydraulic push rod, the fixed cutter head and the hydraulic push rod are connected to the rack, the output end of the hydraulic push rod is connected with a movable cutter head, and the rack is also connected with a direct-current motor;

the power supply module is connected to the rack through a fixed support, and the output voltage of the power supply module is not higher than 60V;

the power supply module supplies power to the direct current motor, and the direct current motor drives the high-pressure oil pump to drive the movable cutter head connected to the hydraulic push rod to move so as to complete firewood chopping.

Further, the power supply of the power supply module comprises a battery pack or a plurality of battery packs connected in series or a plurality of battery packs connected in parallel.

Further, the power supply module comprises a battery pack for supplying power to the direct current motor, the battery pack supports continuous 50A constant current discharge, and the discharge time is not less than 50 s;

the battery pack is provided with primary current protection and secondary current protection, the current interval of the primary current protection is 50-60A, and the current interval of the secondary current protection is 70-80A.

Further, the power supply module further comprises a controller connected to the battery pack, and the controller is used for limiting the discharge current of the battery pack.

Further, the power supply module further comprises a controller connected to the battery pack, and the controller sets the continuous output time of the maximum discharge current to be not less than 2 s.

Further, the power supply module further comprises a controller connected to the battery pack, the controller is further connected to a signal switch, the battery pack is connected to the direct current motor through the controller, and the signal switch is used for controlling the power on and off of the direct current motor.

Furthermore, the battery pack is internally provided with one or more of an overcharge protection module, an overdischarge protection module, a charge-discharge short-circuit protection module and an overtemperature protection module.

Furthermore, the power supply module comprises a battery pack and a battery compartment cover, the battery pack is detachably connected in the battery compartment cover, and the battery compartment cover is connected with the fixed support.

According to the technical scheme, the embodiment of the invention at least has the following effects:

1. according to the firewood splitting machine, the power supply module is connected to the rack and can supply power to the direct current motor, the position of the power supply module can be moved randomly to complete firewood splitting operation when the firewood splitting machine is used, the influence of a mains supply power supply range is avoided, and the working range of the firewood splitting machine is enlarged; the output voltage of the power supply module designed by the application is not higher than 60V, and compared with the voltage of the traditional commercial power, the output voltage of the wood splitting machine is reduced, and the use safety is ensured;

2. the direct-current motor direct-drive mode is adopted to be connected with the high-pressure oil pump, so that higher transmission efficiency is guaranteed, and the noise is lower.

Drawings

FIG. 1 is a schematic structural diagram of a DC firewood chopper according to an embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure of a power supply module and a power working part according to an embodiment of the present invention;

FIG. 3 is a schematic view of the main structure of the power working part according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a power supply module according to an embodiment of the present invention;

FIG. 5 is a schematic block diagram of an embodiment of the present invention.

Wherein: 1. a power supply module; 11. a controller; 12. a signal switch; 13. a battery pack; 14. a pin; 15. an upper cover of the battery compartment; 16. a lower cover of the battery compartment; 2. fixing a bracket; 3. a power working section; 31. a direct current motor; 32. a high-pressure oil pump; 33. a hydraulic push rod; 34. a movable tool bit; 35. and (5) fixing the cutter head.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The invention aims to adopt a DC power supply mode below 60V on the premise of ensuring the stable performance of the wood splitting machine, and cancel the distance constraint of a wired cable, so that the wood splitting machine has wider application range and is safer.

Example 1

As shown in fig. 1 to 5, a direct current firewood splitting machine comprises a power working part 3 and a power supply module 1, wherein the power working part comprises a frame, a fixed cutter head 35 and a hydraulic push rod 33 which are connected to the frame, the output end of the hydraulic push rod 33 is connected with a movable cutter head 34, and the frame is also connected with a direct current motor 31; the power supply module 1 is connected to the rack through the fixed support 2, and the output voltage of the power supply module 1 is not higher than 60V; the power supply module 1 supplies power to the direct current motor 31, and the direct current motor 31 drives the high-pressure oil pump 32 to drive the movable cutter head 34 connected to the hydraulic push rod 33 to move so as to finish wood chopping.

The utility model provides a firewood machine is connected with power module 1 in the frame, and power module can be for the power supply of direct current motor 31, can remove its position at will during the use and accomplish the firewood work of splitting, does not receive commercial power supply scope to influence, has improved the working range of firewood machine. The power supply module's of this application design output voltage is not higher than 60V, compares in the voltage of traditional commercial power, has reduced the output voltage of wood splitting machine, has guaranteed the safety of using.

The mode that adopts direct current motor 31 to directly drive in this application is connected with high-pressure oil pump 32, has guaranteed higher transmission efficiency, and the noise is lower.

The specific structure of the wood splitting machine is shown in fig. 1 to 4, and the wood splitting machine comprises a power working part 3, wherein the power working part 3 comprises a frame, and the top surface of the frame is provided with a fixed cutter head 35 and a movable cutter head 34 which is positioned on the same straight line with the fixed cutter head 35. The fixed cutter head 35 is fixedly connected to the frame, and the movable cutter head 34 is connected with the output end of the hydraulic push rod 33 in the frame. The hydraulic push rod 33 works to drive the movable cutter head 34 to move towards the reverse direction close to or far away from the fixed cutter head 35 to finish wood splitting.

Specifically, when the movable cutter head 34 is far away from the fixed cutter head 35, wood can be placed on the rack, and the hydraulic push rod 33 works to drive the movable cutter head 34 to be close to the fixed cutter head 35, so that the wood can be split.

The fixed cutter head 35 and the movable cutter head 35 are positioned on the same straight line, so that the effect and the quality of wood chopping are ensured.

The power supply module 1 is connected to the bottom surface of the frame, and the power supply module 1 is connected with the hydraulic push rod 33 and used for driving the hydraulic push rod 33 to work. Specifically, the power supply module 1 drives the direct current motor 31 to work, the direct current motor 31 drives the high-pressure oil pump 32 to work, and the high-pressure oil pump 32 drives the hydraulic push rod 33 to stretch and retract so as to complete the firewood chopping action.

In some embodiments, the power supply module 1 is composed of a battery pack 13, and the power supply module may be a battery pack, a plurality of battery packs connected in series, or a plurality of battery packs 13 connected in parallel. No matter how many battery packs the power supply module is composed of, the voltage of the power supply module 1 needs to be controlled to be not higher than 60V.

In some embodiments, the power supply module 1 includes a battery compartment upper cover 15 and a battery compartment lower cover 16 for connecting the battery pack 13, the battery compartment upper cover 15 is connected with the fixing bracket 2 on the rack through a bolt, the battery pack 13 is placed in the battery compartment lower cover 16, and the battery compartment lower cover 16 and the battery compartment upper cover 15 are connected through a plug-in connection or a screw connection.

In some embodiments, the battery pack 13 is further provided with a 2-stage high-current protection setting, the range of the primary current setting is 50-60A, and the secondary protection current setting is 70-80A. Under the room temperature environment, the battery pack can support continuous constant current discharge of 50A, and the continuous discharge time is not less than 50 s.

Furthermore, the discharging current of the battery pack is collected through the internal software of the control board inside the battery pack, and when the discharging current reaches the threshold value of the secondary overcurrent protection, the main discharging loop is cut off.

Further, the battery pack can continuously discharge 50A for 50s at room temperature by selecting a battery core capable of discharging large current and matching with an MOS (metal oxide semiconductor) tube with large overcurrent capacity.

In some embodiments, the battery pack 13 itself is provided with basic safety protection settings for overcharge, overdischarge, charge-discharge short circuits, over-temperature, and the like. Overcharge protection, overdischarge protection, charge-discharge short-circuit protection, over-temperature protection and the like can be realized by adopting the conventional circuit.

Furthermore, software of a control board inside the battery pack can detect charging voltage, current, discharging voltage and discharging current of the battery pack, corresponding charging and discharging current and voltage threshold values are set, when the corresponding starting threshold values are reached, active intervention is conducted on charging and discharging of the battery pack so as to achieve corresponding protection, and meanwhile, temperature sensors are arranged at multiple positions inside the battery pack so as to achieve the functions of temperature detection and over-temperature protection under the working state of the battery pack.

In some embodiments, depending on the hardware and software protection settings of the battery pack 13 and the controller 11, the hardware design of the controller 11 may normally pass a high current with an upper limit not lower than the secondary protection current value of the battery pack (the controller may normally operate at a current of at least 80A). The software sets the protection current of the controller which is not higher than the primary protection current of the battery pack according to the requirement of the actual power working part (the controller works under the current which is less than or equal to 50A), ensures that mutual constraint is formed between the battery pack 13 and the controller 11, and avoids long-time heavy current discharge from influencing the service life of the battery pack 13, the controller 11 and the direct current motor 31.

The controller 11 sets the overload protection current limit value and the continuous discharge time of the maximum current according to the hardware protection parameters of the battery pack 13 and by combining the actual working state of the wood splitting machine. Because the highest load of the wood splitting machine is usually in the transient process that the wood is subjected to pressure and is not split, the maximum current-limiting continuous discharge time of the controller 11 is set to be not less than 2-5 s according to the load characteristic, and the wood splitting machine is ensured to have sufficient time to complete the action of splitting the wood instantly.

Further, the maximum current limit can be set before leaving the factory according to the whole load of the wood splitting machine, for example, 40A and 50A are set, the upper limit of the maximum working load of the corresponding wood splitting machine is high or low, the load design of the controller 11 does not exceed the maximum bearing capacity of the hardware of the controller in principle, in order to achieve the discharge capacity of 2-5S of the maximum current limit, for the controller, power devices such as an MOS tube with high overcurrent capacity are selected to ensure the maximum current limit discharge for a certain time, and the discharge time of 2-5S is set according to the working characteristics of the wood splitting machine, so that the situation that the cost is increased due to the overhigh performance of the hardware of the controller can be avoided.

The signal switch 12 is connected to the controller 11 for controlling the power on/off of the power working unit 3. The direct current voltage output by the battery pack 13 through the pin 14 does not exceed 60V. The direct current motor 31 drives the high-pressure oil pump 32 to work, the hydraulic push rod 33 is pushed to move, the movable cutter head 34 is connected with the hydraulic push rod 33, the movable cutter head 34 pushes the firewood to extrude the fixed cutter head 35, and the firewood chopping action is completed.

Example 2

The difference between this embodiment and embodiment 1 is that this embodiment selects a high current switch to be connected to the main circuit.

Example 3

The difference between this embodiment and embodiment 1 is that in this embodiment, the battery pack itself does not have protection measures such as overcharge, overdischarge, and overcurrent, and protection is provided by setting parameters of the controller.

Specifically, the software of the control board in the battery pack of the controller 11 limits the discharge current and the discharge duration of the battery pack, thereby achieving the function of protecting the battery pack.

Example 4

The difference between this embodiment and embodiment 1 is that in this embodiment, the controller itself does not emphasize the overload protection, and relies on the protection means of the battery pack itself to perform protective power on/off.

Specifically, the discharging current of the battery pack is collected through the internal software of the control panel in the battery pack, and when the discharging current reaches a set overcurrent protection threshold value, a main discharging loop is cut off, so that the battery pack is protected.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.