Portable single-hand saw

Abstract

The utility model discloses a portable single hand saw which comprises a right machine shell, a motor and a guide plate, a left machine shell is fixed to one side of the right machine shell through screw joint of screws, the motor is arranged in the tail portion of the right machine shell and the tail portion of the left machine shell, a driving gear is rotationally connected into the right machine shell and the left machine shell through bearings, and the driving gear is meshed with a driven gear. The surface of the left machine shell is arranged on an engine oil tank, the surface of the engine oil tank is in threaded connection with a tank cover, the surface of the engine oil tank is provided with an engine oil pipe used for filling engine oil, the bottom of the engine oil pipe is provided with an engine oil filter, the surface of the engine oil filter is sleeved with a spring, and the engine oil pipe on the surface of the engine oil tank can fill the engine oil into the engine oil tank. Particle impurities in engine oil can be intercepted and filtered through tiny holes of the filter screen in the engine oil filter, the filtered engine oil flows into the engine oil tank to be stored, the particle impurities can be effectively filtered through the engine oil filter, cleanliness of the engine oil is guaranteed, and a good lubricating effect is provided for a chain wheel and a chain.

Description

Technical Field

[0001] The utility model belongs to the technical field of single-hand saws, and in particular relates to a portable single-hand saw. Background Art

[0002] A single-handed saw is a convenient tool commonly used in carpentry or pruning wood branches. However, during the operation of a single-handed saw, severe friction will occur between the chain and the material being cut. Long-term use will cause the metal material on the chain surface to wear out quickly. Therefore, in order to avoid the saw teeth becoming blunt after wear and affecting the cutting efficiency, it is necessary to regularly add oil to the chain surface for lubrication and maintenance.

[0003] The existing single-hand saw is generally provided with an oil tank for filling oil, so that the chain surface can be lubricated and maintained by the oil in the oil tank. However, when replenishing the oil in the oil tank, a funnel is generally inserted into the oil filling port at the entrance of the oil tank, and then the oil is slowly poured in for replenishment. However, since some particulate impurities may be mixed in the oil, when the particulate impurities enter between the chain and the sprocket, the particulate impurities will continuously scrape the metal surface during the movement of the chain, accelerating the wear of the chain and the sprocket. The impurities will also clog the lubrication pipes on the chain, resulting in the oil not being evenly distributed on the chain surface, further affecting the lubrication effect. Utility Model Content

[0004] The purpose of the present utility model is to provide a portable single-hand saw to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable single-hand saw, comprising:

[0006] A right housing, one side of which is fixed with a left housing by screws;

[0007] A motor, the motor being arranged in the tail portion of the right casing and the left casing, and the right casing and the left casing being rotatably connected to a drive gear via a bearing, the output shaft of the motor being connected to the drive gear, the right casing being rotatably connected to a driven gear via a bearing, and the drive gear being meshed with the driven gear, the middle portion of the driven gear being connected to a transmission shaft, the middle portion of the transmission shaft being sleeved with a bearing, and the outer ring of the bearing being connected to the right casing, and the other end of the transmission shaft being connected to a sprocket provided in the left casing;

[0008] A guide plate is connected to the surface of the left casing through a pin shaft and a chain is mounted on the surface of the guide plate, the sprocket is engaged with the chain, the surface of the left casing is provided on the oil box and a box cover is threadedly connected to the surface of the oil box and a sealing ring is provided at the connection between the box cover and the oil box, an oil pipe for filling oil is provided on the surface of the oil box, an oil filter is provided at the bottom of the oil pipe and a spring is mounted on the surface of the oil filter so that the oil filter can filter the oil entering the oil box.

[0009] Preferably, a sleeve is rotatably connected to the surface of the left casing and located at the top of the guide plate through a pin, a torsion spring is provided at the connection between the sleeve and the left casing, a side cover is connected to the surface of the left casing, an oil outlet pipe is provided inside the side cover and located at the meshing point of the sprocket and the chain, and the other end of the oil outlet pipe is connected to the oil filter.

[0010] Preferably, a top card is provided on the surface of the left housing and located at the tail of the guide plate, and a pressure cover is provided on one side of the top card.

[0011] Preferably, a control board is provided in the right housing and an L-shaped terminal is electrically connected to the surface of the control board. A trigger is provided on the surface of the right housing and a switch assembly and a controller are connected to one side of the trigger. The motor, control board and switch assembly are all electrically connected to the controller.

[0012] Preferably, a baffle is screwed on the surface of the right casing and the left casing and located on one side of the trigger, and an oil pump is provided on the surface of the oil outlet pipe.

[0013] Preferably, the surface of the left casing is threaded with an oil pump cover, and the surface of the side cover is rotatably connected with a lock nut.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The oil tank on the left surface of the engine case can be used to store engine oil, and the oil pipe on the surface of the oil tank can be used to add engine oil to the oil tank. When the added engine oil flows into the oil tank, it can intercept and filter particulate impurities in the engine oil through the tiny pores of the filter screen in the oil filter, and the filtered engine oil flows into the oil tank for storage. When the chain needs to be lubricated, a small amount of engine oil can be pumped into the oil outlet pipe through the oil pump, and pumped out through the other end of the oil outlet pipe, and dripped onto the meshing point of the sprocket and chain to lubricate the sprocket and chain. The oil filter can effectively filter particulate impurities, ensure the cleanliness of the engine oil, and provide good lubrication effect for the sprocket and chain.

[0016] The user holds the handle where the right casing and the left casing are connected, and presses the trigger to turn on the control switch assembly. The output shaft of the motor drives the driving gear to rotate, and the driving gear drives the meshing driven gear to rotate. The driven gear drives the sprocket to rotate through the transmission shaft, so that the meshing chain is driven by the rotating sprocket to rotate to perform the sawing operation. The saw can be held in one hand for work, and is relatively portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the right casing of the utility model;

[0018] Figure 2 This is a schematic structural diagram of the left casing of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the guide plate and chain of the utility model.

[0020] In the figure: 1. Right casing; 2. Left casing; 3. Motor; 4. Lock nut; 5. Driving gear; 6. Driven gear; 7. Transmission shaft; 8. Sprocket; 9. Guide plate; 10. Chain; 11. Oil tank; 12. Tank cover; 13. Oil pipe; 14. Oil filter; 15. Spring; 16. Sheath; 17. Side cover; 18. Oil outlet pipe; 19. Torsion spring; 20. Pressure cover; 21. Control panel; 22. L-type terminal; 23. Switch assembly; 24. Controller; 25. Baffle; 26. Oil pump; 27. Top card; 28. Oil pump cover; 29. ​​Trigger. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The utility model provides Figure 1-3 A portable single-hand saw is shown, comprising:

[0023] A right housing 1, with a left housing 2 fixed to one side of the right housing 1 by screws;

[0024] The motor 3 is provided in the rear part of the right housing 1 and the left housing 2, and the right housing 1 and the left housing 2 are rotatably connected to a drive gear 5 through a bearing. The output shaft of the motor 3 is connected to the drive gear 5. A driven gear 6 is rotatably connected to the right housing 1 through a bearing, and the drive gear 5 meshes with the driven gear 6. A transmission shaft 7 is connected to the middle of the driven gear 6. A bearing is sleeved in the middle of the transmission shaft 7, and the outer ring of the bearing is connected to the right housing 1. The other end of the transmission shaft 7 is connected to a sprocket 8 provided in the left housing 2;

[0025] The guide plate 9 is connected to the surface of the left casing 2 through a pin shaft and the surface of the guide plate 9 is covered with a chain 10, the sprocket 8 is engaged with the chain 10, the surface of the left casing 2 is provided on the oil box 11 and the surface of the oil box 11 is threadedly connected to the box cover 12 and a sealing ring is provided at the connection between the box cover 12 and the oil box 11, the surface of the oil box 11 is provided with an oil pipe 13 for filling oil, the bottom of the oil pipe 13 is provided with an oil filter 14 and the surface of the oil filter 14 is covered with a spring 15 so that the oil filter 14 can filter the oil entering the oil box 11, and the oil filter 14 will be affected by factors such as vibration during operation. The spring 15 can generate sufficient elastic force to firmly fix the oil filter 14 in the correct position inside the oil box 11 to prevent the oil filter 14 from being displaced or shaking due to vibration or oil impact.

[0026] A cover 16 is provided on the surface of the left casing 2 and is located at the top of the guide plate 9 and is rotatably connected by a pin. A torsion spring 19 is provided at the connection between the cover 16 and the left casing 2. A side cover 17 is connected to the surface of the left casing 2. An oil outlet pipe 18 is provided inside the side cover 17 and at the meshing point of the sprocket 8 and the chain 10. The other end of the oil outlet pipe 18 is connected to the oil filter 14. The torsion spring 19 provides elastic force for the cover 16. When the cover 16 is opened or closed, the torsion spring 19 can automatically reset the cover 16 to its initial position, ensuring that the cover 16 can be at the top of the guide plate 9 when not in use, providing effective safety protection.

[0027] A top card 27 is provided on the surface of the left housing 2 and located at the tail of the guide plate 9, and a pressure cover 20 is provided on one side of the top card 27. The top card 27 is used to fix the tail of the guide plate 9 to ensure that the guide plate 9 maintains a stable position during the operation of the single-hand saw without shaking or shifting.

[0028] A control board 21 is provided in the right housing 1 and an L-shaped terminal 22 is electrically connected to the surface of the control board 21. A trigger 29 is provided on the surface of the right housing 1 and a switch assembly 23 and a controller 24 are connected to one side of the trigger 29. The motor 3, the control board 21, and the switch assembly 23 are all electrically connected to the controller 24.

[0029] A baffle 25 is screwed onto the surface of the right casing 1 and the left casing 2 and is located on one side of the trigger 29. An oil pump 26 is provided on the surface of the oil outlet pipe 18. An oil pump cover 28 is screwed onto the surface of the left casing 2. A lock nut 4 is rotatably connected to the surface of the side cover 17. The oil pump 26 pumps a small amount of oil into the oil outlet pipe 18, and pumps it out through the other end of the oil outlet pipe 18, and drips onto the meshing point of the sprocket 8 and the chain 10 to lubricate the sprocket 8 and the chain 10. The oil pump cover 28 can prevent dust, impurities, etc. from entering the oil pump 26, protect the internal structure of the oil pump 26, and ensure its normal operation.

[0030] The portable single-hand saw can be used to store engine oil through the oil tank 11 on the surface of the left housing 2, and the oil pipe 13 on the surface of the oil tank 11 can be used to fill the oil tank 11. When the filled engine oil flows into the oil tank 11, the particulate impurities in the engine oil can be intercepted and filtered by the tiny pores of the filter screen in the engine oil filter 14, and the filtered engine oil flows into the engine oil tank 11 for storage. A one-way valve is provided on the surface of the engine oil tank 11, and the one-way valve can effectively prevent the engine oil pump 26 from extracting engine oil and the engine oil from flowing back. When the chain 10 needs to be lubricated, a small amount of engine oil can be pumped into the oil outlet pipe 18 by the engine oil pump 26, and pumped out through the other end of the oil outlet pipe 18, and dripped to the meshing position of the sprocket 8 and the chain 10 to lubricate the sprocket 8 and the chain 10, and the particulate impurities can be effectively filtered through the oil filter 14, thereby ensuring the cleanliness of the engine oil and providing a good lubrication effect for the sprocket 8 and the chain 10.

[0031] The user holds the handle where the right housing 1 and the left housing 2 are connected, and presses the trigger 29 to control the switch assembly 23 to open. The switch assembly 23 transmits a signal to the controller 24. After processing, the controller 24 issues an instruction to control the motor 3 to work. The output shaft of the motor 3 drives the driving gear 5 to rotate, and the driving gear 5 drives the meshing driven gear 6 to rotate, and the driven gear 6 drives the sprocket 8 to rotate through the transmission shaft 7, so that the meshing chain 10 is driven by the rotating sprocket 8 to rotate, so that the sawing operation can be performed, and it can be held in one hand for work, which is relatively portable.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A portable single-hand saw, characterized in that: include: A right housing (1), wherein a left housing (2) is fixed to one side of the right housing (1) by screws; A motor (3), wherein the motor (3) is arranged in the rear of the right housing (1) and the left housing (2), and the right housing (1) and the left housing (2) are rotatably connected to a driving gear (5), the output shaft of the motor (3) is connected to the driving gear (5), the right housing (1) is rotatably connected to a driven gear (6), and the driving gear (5) is meshed with the driven gear (6), the middle of the driven gear (6) is connected to a transmission shaft (7), the middle of the transmission shaft (7) is sleeved with a bearing, and the outer ring of the bearing is connected to the right housing (1), and the other end of the transmission shaft (7) is connected to a sprocket (8) provided in the left housing (2); A guide plate (9) is connected to the surface of the left casing (2) through a pin shaft, and a chain (10) is mounted on the surface of the guide plate (9), and the sprocket (8) is engaged with the chain (10). The surface of the left casing (2) is provided on an oil box (11), and a box cover (12) is threadedly connected to the surface of the oil box (11), and a sealing ring is provided at the connection between the box cover (12) and the oil box (11). An oil pipe (13) for filling oil is provided on the surface of the oil box (11), and an oil filter (14) is provided at the bottom of the oil pipe (13), and a spring (15) is mounted on the surface of the oil filter (14) so ​​that the oil filter (14) can filter the oil entering the oil box (11).

2. The portable single-hand saw according to claim 1, characterized in that: A sleeve (16) is rotatably connected to the surface of the left casing (2) and located at the top of the guide plate (9) via a pin. A torsion spring (19) is provided at the connection between the sleeve (16) and the left casing (2). A side cover (17) is connected to the surface of the left casing (2). An oil outlet pipe (18) is provided inside the side cover (17) and located at the meshing position of the sprocket (8) and the chain (10). The other end of the oil outlet pipe (18) is connected to the oil filter (14).

3. The portable single-hand saw according to claim 1, characterized in that: A top card (27) is provided on the surface of the left housing (2) and located at the tail of the guide plate (9), and a pressure cover (20) is provided on one side of the top card (27).

4. The portable single-hand saw according to claim 2, characterized in that: A control panel (21) is provided in the right housing (1), and the surface of the control panel (21) is electrically connected to an L-shaped terminal (22). A trigger (29) is provided on the surface of the right housing (1), and one side of the trigger (29) is connected to a switch assembly (23) and a controller (24). The motor (3), the control panel (21), and the switch assembly (23) are all electrically connected to the controller (24).

5. The portable single-hand saw according to claim 4, characterized in that: A baffle (25) is screwed onto the surface of the right housing (1) and the left housing (2) and is located on one side of the trigger (29). An oil pump (26) is provided on the surface of the oil outlet pipe (18).

6. The portable single-hand saw according to claim 2, characterized in that: The surface of the left housing (2) is screwed with an oil pump cover (28), and the surface of the side cover (17) is rotatably connected with a lock nut (4).

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