Modular chain saw with reduction gearbox

Abstract

The utility model discloses a modularization chain saw with reduction gearbox, concretely relates to forestry machinery technical field, including reduction mechanism, the left side of reduction mechanism is provided with DC motor, lubricating mechanism, the lubricating mechanism is located the front side of DC motor, the right side of reduction mechanism is provided with saw body mechanism, the reduction mechanism includes reduction gear box, the inner chamber of reduction gear box is rotatory connection with driven gear, driving gear respectively, driving gear and DC motor's output shaft fixed connection, driving gear and driven gear engage. The utility model discloses a modularization chain saw with reduction gearbox, through setting up independent reduction mechanism and modularization lubricating mechanism, saw body mechanism, realized the quick dismounting of each functional unit and independent maintenance, effectively solved the maintenance difficulty, the problem of high replacement cost of traditional chain saw because of the strong structure integrity, improved the maintainability and service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of forestry machinery technology, and in particular to a modular chainsaw with a speed reducer. Background Technology

[0002] Chainsaws, as a common mechanical cutting tool, are widely used in forestry, landscaping, construction, and emergency rescue. Traditional chainsaws typically consist of a power system such as an internal combustion engine or electric motor, a transmission system (including a clutch, sprockets, and chain), and a lubrication system. The power take-off shaft usually drives the chain directly or through a simple single-stage transmission structure for cutting operations. Existing chainsaws have the following defects in structural design and functional implementation: When output torque is limited but load is high, it is difficult to balance the chain's running speed and cutting force, resulting in low energy conversion efficiency and affecting cutting performance. Furthermore, traditional chainsaws often use a one-piece molded housing, integrating the engine, transmission components, and lubrication tank into the same structure. This design necessitates complete disassembly or replacement in case of localized failure or upgrades, leading to high maintenance costs and complex operations. Different applications, such as logging and stone cutting, have significantly different requirements for chainsaw speed and torque, but existing chainsaws typically use fixed transmission ratios, failing to flexibly adapt to various working conditions and limiting their application range. Simultaneously, the lubrication tank is usually integrated with the main housing, lacking flexibility in its location and oil circuit layout, making it difficult to optimize and adjust for different power types or structural forms. Utility Model Content

[0003] The main purpose of this utility model is to provide a modular chainsaw with a gearbox, which can effectively solve the problems of low transmission efficiency, high maintenance cost, poor applicability and inflexible lubrication system layout of traditional chainsaws.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A modular chainsaw with a reduction gearbox includes a reduction mechanism. A DC motor and a lubrication mechanism are located on the left side of the reduction mechanism, with the lubrication mechanism positioned in front of the DC motor. A saw body mechanism is located on the right side of the reduction mechanism. The reduction mechanism includes a reduction gearbox, whose inner cavity is rotatably connected to a driven gear and a driving gear. The driving gear is fixedly connected to the output shaft of the DC motor and meshes with the driven gear. A rotating rod is fixedly installed at the center of the right end of the driven gear. The right end of the rotating rod extends through to the right side of the reduction gearbox and is fixedly fitted with a chain drive gear. The saw body mechanism... The structure includes a chainsaw guide plate, a chain driven on the outer side of the chainsaw guide plate, the chain being connected to a chain drive gear, a lubricating oil tank mounting plate fixedly installed at the front end of the reduction gearbox, two hexagonal bolt holes on the left side of the lubricating oil tank mounting plate, two through holes on the right side of the lubricating oil tank mounting plate extending into the inner cavity of the hexagonal bolt holes, and fixing bolts installed on the inner ring of the two through holes, and a horizontal hole extending through the left and right sides of the rear end of the chainsaw guide plate, the right ends of the two fixing bolts extending through the horizontal hole to the right side of the chainsaw guide plate and threaded with fixing nuts for fastening the chainsaw guide plate.

[0005] Preferably, the hexagonal bolt caps of the two fixing bolts are respectively engaged in the inner cavity of the two hexagonal bolt holes to maintain the flatness of the left side of the lubricating oil tank mounting plate.

[0006] Preferably, the lubrication mechanism includes a lubricating oil tank, which is installed on the left side of the lubricating oil tank mounting plate. A filler port is connected to the left side of the lubricating oil tank, and the filler port can be sealed by means of a threaded cap.

[0007] Preferably, the lubrication mechanism further includes an oil pump, the input end of which is connected to an oil inlet pipe, and the bottom right side of the lubricating oil tank is fixedly connected to an oil outlet that penetrates its inner cavity. The oil inlet pipe is connected to the oil outlet, the output end of the oil pump is fixedly connected to an oil outlet pipe, and the lubricating oil tank mounting plate has a through-hole for oil pipes on both sides. The other end of the oil outlet pipe is located inside the through-hole.

[0008] Preferably, mounting rings are fixedly installed on both the front and rear sides of the oil pump, and oil pump mounting bolts are provided on the inner rings of both mounting rings. Two bolt holes aligned with the inner rings of the mounting rings are opened on the right side of the reduction gearbox. The two oil pump mounting bolts are threadedly connected to the two bolt holes respectively for installing the oil pump.

[0009] Preferably, the chainsaw guide plate has an oil supply chamber, and several oil outlet micro-holes extending into the oil supply chamber are provided on both the upper and lower sides of the chainsaw guide plate. An oil inlet hole extending into the oil supply chamber is provided on the left side of the chainsaw guide plate. The oil inlet hole is sleeved with the end of the oil outlet pipe away from the oil pump, and is used to receive lubricating oil and flow out from the several oil outlet micro-holes to lubricate the chain.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model provides a modular chainsaw with a reduction gearbox. By setting up an independent reduction mechanism and modular lubrication mechanism and saw body mechanism, it realizes the quick disassembly and independent maintenance of each functional unit, effectively solving the problems of difficult maintenance and high replacement cost caused by the strong integrated structure of traditional chainsaws, and improving the maintainability and service life of the equipment.

[0011] 2. This utility model provides a modular chainsaw with a gearbox. By adopting a gear reduction transmission structure, it achieves a reduction in the output speed of the DC motor and an increase in torque, enabling the chainsaw to adapt to the cutting needs under different load conditions. At the same time, the lubrication system achieves uniform lubrication of the chain through the oil supply chamber and oil outlet micro-holes inside the chainsaw guide plate, effectively improving cutting efficiency and chain service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the deceleration mechanism and saw body mechanism of this utility model; Figure 3 This is a schematic cross-sectional view of the lubricating oil tank mounting plate of this utility model; Figure 4 This is a schematic diagram of the lubrication mechanism of this utility model; Figure 5 This is a schematic diagram of the electric saw guide plate structure of this utility model.

[0013] In the diagram: 1. Reduction mechanism; 11. Reduction gearbox; 12. Driven gear; 13. Drive gear; 14. Rotating rod; 15. Chain drive gear; 16. Lubricating oil tank mounting plate; 161. Hex bolt hole; 162. Through hole; 163. Fixing bolt; 164. Fixing nut; 165. Oil pipe hole; 2. DC motor; 3. Saw body mechanism; 31. Electric saw guide plate; 311. Horizontal hole; 312. Oil inlet; 313. Oil outlet micro-hole; 32. Chain; 4. Lubrication mechanism; 41. Lubricating oil tank; 42. Filler port; 43. Oil outlet; 44. Oil pump; 45. Oil inlet pipe; 46. Oil outlet pipe; 47. Mounting ring; 48. Oil pump mounting bolt. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] like Figures 1 to 5 As shown, a modular chainsaw with a reduction gearbox includes a reduction mechanism 1, a DC motor 2, a saw body mechanism 3, and a lubrication mechanism 4. Each component adopts a modular design, which facilitates disassembly, maintenance, and replacement, thereby improving the flexibility of use and maintenance efficiency.

[0016] like Figure 1 and Figure 2 As shown, the reduction mechanism 1 is located in the center of the chainsaw. It is connected to the DC motor 2 on the left and the saw body mechanism 3 on the right. The lubrication mechanism 4 is located in front of the DC motor 2 and fixed on the reduction mechanism 1. The reduction mechanism 1 includes a reduction gearbox 11. The inner cavity of the reduction gearbox 11 is rotatably connected to the driven gear 12 and the driving gear 13 through bearings. The driving gear 13 is fixedly connected to the output shaft of the DC motor 2 through a key or interference fit to ensure reliable power transmission. The driving gear 13 meshes with the driven gear 12 to form a reduction transmission pair, thereby reducing the speed and increasing the torque. A rotating rod 14 is fixedly installed at the center of the right end of the driven gear 12. The right end of the rotating rod 14 passes through the right side wall of the reduction gearbox 11 and is sealed by a sealing ring. The sealing ring is an O-ring rubber sealing ring made of nitrile rubber, which is used to prevent lubricating oil leakage and dust from entering the reduction gearbox 11. A chain drive gear 15 is fixedly installed at the right end of the rotating rod 14. The transmission ratio between the driving gear 13 and the driven gear 12 is in the range of 2:1 to 5:1, preferably 3:1, in order to achieve speed reduction and torque increase. The gear material is 20CrMnTi alloy steel, and the surface is carburized and quenched to ensure surface hardness. The DC motor 2 is a brushless DC motor, and the motor output shaft is connected to the driving gear 13 by a key.

[0017] The saw mechanism 3 includes a saw guide plate 31 and a chain 32. The saw guide plate 31 is a long strip-shaped plate structure with a chain 32 on its outer side. The chain 32 meshes with the chain drive gear 15 for transmission. When the chain drive gear 15 rotates, it drives the chain 32 to move along the saw guide plate 31 to achieve the cutting function. The rear end of the saw guide plate 31 has a horizontal hole 311 that runs through it from left to right for mounting and fixing components.

[0018] A lubricating oil tank mounting plate 16 is fixedly installed at the front end of the reduction gearbox 11. The lubricating oil tank mounting plate 16 is integrally connected to the reduction gearbox 11 by welding or bolting. Figure 3As shown, the left side of the lubricating oil tank mounting plate 16 has two hexagonal bolt holes 161, and the right side has two through holes 162 that penetrate into the inner cavity of the hexagonal bolt holes 161. The inner ring of each of the two through holes 162 is provided with a fixing bolt 163. The right end of the fixing bolt 163 passes through the horizontal hole 311 and the right side of the electric saw guide plate 31 in sequence, and is tightened by the thread of the fixing nut 164, thereby firmly installing the electric saw guide plate 31 on the reduction mechanism 1. The hexagonal bolt caps of the fixing bolts 163 are respectively engaged in the inner cavity of the two hexagonal bolt holes 161, so that the left surface of the lubricating oil tank mounting plate 16 remains flat, which facilitates the installation of other components.

[0019] Lubrication mechanism 4 Figure 4 As shown, the system includes a lubricating oil tank 41, an oil filler port 42, an oil outlet port 43, an oil pump 44, an oil inlet pipe 45, an oil outlet pipe 46, a mounting ring 47, and an oil pump mounting bolt 48. The lubricating oil tank 41 is fixed to the left side of the lubricating oil tank mounting plate 16 by bolts or clips. The left side of the lubricating oil tank 41 is connected to the oil filler port 42, which is connected to a sealing cap by threads for easy addition of lubricating oil. The bottom right side of the lubricating oil tank 41 is fixedly connected to the oil outlet port 43, which penetrates the inner cavity of the lubricating oil tank 41. The input end of the oil pump 44 is connected to the oil outlet port 43 through the oil inlet pipe 45, and the output end of the oil pump 44 is fixedly connected to the oil outlet pipe 46. The lubricating oil tank mounting plate 16 has a through-hole 165, and the other end of the oil outlet pipe 46 passes through the through-hole 165. The oil pump 44 is fixedly installed on both the front and rear sides with mounting rings 47. The inner rings of the two mounting rings 47 are provided with oil pump mounting bolts 48. The right side of the reduction gearbox 11 has two bolt holes that are aligned with the inner rings of the mounting rings 47. The two oil pump mounting bolts 48 are threaded into the two bolt holes respectively, thereby fixing the oil pump 44 on the reduction gearbox 11. The oil pump 44 is linked to the DC motor 2 for control. When the DC motor 2 starts, the oil pump 44 is simultaneously powered on and works. Alternatively, the oil pump 44 is controlled by an independent time relay to operate intermittently, for example, working for 10 seconds and stopping for 30 seconds, to ensure a continuous and uniform supply of lubricating oil.

[0020] like Figure 5 As shown, the inside of the electric saw guide plate 31 is provided with an oil supply chamber. Multiple oil outlet micro-holes 313 are provided on the upper and lower sides of the electric saw guide plate 31, which lead to the oil supply chamber. An oil inlet hole 312 is provided on the left side of the electric saw guide plate 31, which leads to the oil supply chamber. The oil inlet hole 312 is connected to the end of the oil outlet pipe 46 away from the oil pump 44 through a quick connector. The quick connector is a plug-in self-sealing connector. The male end is installed at the end of the oil outlet pipe 46, and the female end is set at the oil inlet hole 312. There is a click sound when connecting to ensure reliable sealing and allow lubricating oil to enter the oil supply chamber smoothly. The oil supply chamber is a rectangular channel extending along the length of the electric saw guide plate 31. The oil supply chamber is connected to the oil inlet 312 through a tapered hole to ensure smooth flow of lubricating oil.

[0021] The working principle of this modular chainsaw with a speed reducer will be explained in detail below.

[0022] like Figure 1-5 As shown, during operation, the DC motor 2 starts, driving the drive gear 13 to rotate. The drive gear 13 meshes with the driven gear 12, achieving speed reduction and torque increase through gear transmission. The driven gear 12 drives the rotating rod 14 and the chain drive gear 15 to rotate. The chain drive gear 15 drives the chain 32 to move along the chainsaw guide plate 31 for cutting operations. Simultaneously, the lubrication mechanism 4 starts working: the oil pump 44 draws lubricating oil from the lubricating oil tank 41 through the oil inlet pipe 45 and delivers the lubricating oil to the oil inlet hole 312 of the chainsaw guide plate 31 through the oil outlet pipe 46. After the lubricating oil enters the oil supply chamber of the chainsaw guide plate 31, it seeps out evenly from multiple oil outlet micro-holes 313, continuously lubricating the chain 32, reducing friction and wear, and extending the chain's service life. The modular design makes each component easy to disassemble and maintain. For example, when it is necessary to replace the chainsaw guide plate... When the saw guide plate 31 or chain 32 is removed, simply loosen the fixing nut 164 to separate the saw body mechanism 3 from the reduction mechanism 1. The lubrication mechanism 4 can also be disassembled independently for easy cleaning or replacement of the oil pump 44 and the lubrication tank 41. When it is necessary to disassemble the saw body mechanism 3, first loosen the fixing nut 164, and then pull the fixing bolt 163 out of the horizontal hole 311 to separate the electric saw guide plate 31 from the reduction mechanism 1. The lubrication tank 41 is fixed to the lubrication tank mounting plate 16 by clips or bolts. When disassembling, simply remove the clips or loosen the bolts to remove the lubrication tank 41. To disassemble the oil pump 44, first unscrew the oil pump mounting bolt 48, and then disconnect the connection between the oil inlet pipe 45 and the oil outlet pipe 46. In addition, by replacing the gear set with different transmission ratios, the speed and torque requirements under different working conditions can be adapted, improving the applicability of the chainsaw.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A modular chainsaw with a reduction gearbox, comprising a reduction mechanism (1), characterized in that: A DC motor (2) and a lubrication mechanism (4) are arranged on the left side of the reduction mechanism (1). The lubrication mechanism (4) is located in front of the DC motor (2). A saw body mechanism (3) is arranged on the right side of the reduction mechanism (1). The reduction mechanism (1) includes a reduction gearbox (11). The inner cavity of the reduction gearbox (11) is rotatably connected to a driven gear (12) and a driving gear (13). The driving gear (13) is fixedly connected to the output shaft of the DC motor (2). The driving gear (13) meshes with the driven gear (12). A rotating rod (14) is fixedly installed at the center of the right end of the driven gear (12). The right end of the rotating rod (14) extends through to the right side of the reduction gearbox (11) and is fixedly installed with a chain drive gear (15). The saw body mechanism (3) includes an electric saw guide plate (31). The electric saw... A chain (32) is provided on the outer side of the guide plate (31). The chain (32) is connected to the chain drive gear (15). A lubricating oil tank mounting plate (16) is fixedly installed at the front end of the reduction gearbox (11). Two hexagonal bolt holes (161) are opened on the left side of the lubricating oil tank mounting plate (16). Two through holes (162) are opened on the right side of the lubricating oil tank mounting plate (16) and are connected to the inner cavity of the hexagonal bolt holes (161). Fixing bolts (163) are provided on the inner ring of the two through holes (162). A horizontal hole (311) is opened at the rear end of the electric saw guide plate (31). The right ends of the two fixing bolts (163) are connected to the right side of the electric saw guide plate (31) through the horizontal hole (311) and are threaded with fixing nuts (164) for fastening the electric saw guide plate (31).

2. A modular chainsaw with a reduction gearbox according to claim 1, characterized in that: The hexagonal bolt caps of the two fixing bolts (163) are respectively engaged in the inner cavity of the two hexagonal bolt holes (161) to maintain the flatness of the left side of the lubricating oil tank mounting plate (16).

3. A modular chainsaw with a gearbox according to claim 1, characterized in that: The lubrication mechanism (4) includes a lubricating oil tank (41), which is installed on the left side of the lubricating oil tank mounting plate (16). A filling port (42) is connected to the left side of the lubricating oil tank (41), and the filling port (42) can be sealed by means of a threaded cap.

4. A modular chainsaw with a gearbox according to claim 3, characterized in that: The lubrication mechanism (4) also includes an oil pump (44), the input end of which is connected to an oil inlet pipe (45), and the bottom right side of the lubricating oil tank (41) is fixedly connected to an oil outlet (43) that penetrates its inner cavity. The oil inlet pipe (45) is connected to the oil outlet (43), and the output end of the oil pump (44) is fixedly connected to an oil outlet pipe (46). The lubricating oil tank mounting plate (16) has an oil pipe hole (165) that penetrates from left to right, and the other end of the oil outlet pipe (46) is located inside the oil pipe hole (165).

5. A modular chainsaw with a gearbox according to claim 4, characterized in that: The oil pump (44) is fixedly installed with mounting rings (47) on both the front and rear sides. The inner rings of the two mounting rings (47) are provided with oil pump mounting bolts (48). The right side of the reduction gearbox (11) has two bolt holes that are aligned with the inner rings of the mounting rings (47). The two oil pump mounting bolts (48) are threaded to the two bolt holes respectively for installing the oil pump (44).

6. A modular chainsaw with a gearbox according to claim 5, characterized in that: The electric saw guide plate (31) has an oil supply chamber. Several oil outlet micro-holes (313) are provided on both the upper and lower sides of the electric saw guide plate (31) and extend into the oil supply chamber. An oil inlet hole (312) is provided on the left side of the electric saw guide plate (31) and extends into the oil supply chamber. The oil inlet hole (312) is connected to the end of the oil outlet pipe (46) away from the oil pump (44) to receive lubricating oil and flow out from several oil outlet micro-holes (313) to lubricate the chain (32).

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