Electric starting chain saw

Abstract

The invention discloses an electric starting chain saw, and relates to the technical field of chain saws. The chain saw specifically comprises a chain saw engine and a flywheel, the chain saw engine is fixedly installed in a chain saw shell, the flywheel is fixedly installed at one end of a crankshaft of the chain saw engine, a driving bevel gear ring is arranged on one side of the flywheel, an electric starting assembly is arranged on one side of the driving bevel gear ring, and the electric starting assembly is installed on one side of the chain saw shell. The electric starting assembly drives the chain saw engine through the flywheel. A main body of the electric starting assembly is arranged to be a driving motor. The driving motor of the electric starting assembly is fixed into the chain saw shell through the mounting support, the positioning sleeve, the connecting bearing and other parts are connected in a sleeving or clamping mode, the structure is compact, assembling is convenient, compared with the prior art, gear transmission structures are few, and the influence of dust generated by work of the chain saw on the electric starting assembly is small; and meanwhile, a protective mounting shell is matched, so that the electric starting assembly is effectively protected, and the influence of working dust is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil saw, in particular to an electric start oil saw. BACKGROUND

[0002] Chain saw, also known as oil saw, is a hand-held saw powered by a gasoline engine, mainly used for logging and timber production. Its working principle is to rely on the transverse movement of the staggered L-shaped blades on the saw chain to perform shearing action. Chain saws are generally divided into motorized chain saws, non-motorized chain saws, etc.

[0003] As the patent application number 202321225917.2 of the present applicant on May 17, 2023, a kind of electric start oil saw is disclosed, which is started by motor driving engine, realizes quick start, saves time and effort, improves the use convenience of operator;Users can flexibly choose between motor and hand-pulled two starting modes according to actual conditions, improve the adaptability of oil saw to use scene.

[0004] The electric start oil saw in the above patent still has the following shortcomings: the device drives the engine through the planetary gear structure, the planetary gear structure and the motor are arranged in the starting shell, and the motor cooling flywheel is also arranged in the starting shell. The starting shell itself is provided with a plurality of heat dissipation grooves. The dust generated during the operation of the oil saw will enter the starting shell through the heat dissipation grooves, and then adhere to the planetary gear structure. Long-term dust invasion will have a certain impact on the planetary gear structure, which is not conducive to the normal use of electric drive. SUMMARY

[0005] The purpose of the present application is to solve the shortcomings in the prior art and to provide an electric start oil saw.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: An electric start oil saw, comprising an oil saw engine and a flywheel, the oil saw engine is fixedly installed in the oil saw shell, the flywheel is fixedly installed at one end of the oil saw engine crankshaft, one side of the flywheel is provided with a driving bevel gear ring, one side of the driving bevel gear ring is provided with an electric starting assembly, the electric starting assembly is installed on one side of the oil saw shell, and the electric starting assembly drives the oil saw engine through the flywheel. The main body of the electric starting assembly is provided with a driving motor, the output shaft of the driving motor is provided with a driving main shaft, and the end of the driving main shaft is fixedly provided with a connecting bevel gear meshing with the driving bevel gear ring. The outer wall of the driving motor is fixedly provided with a motor mounting seat, the tail end of the motor mounting seat is fixedly provided with a sliding push rod, the tail end of the sliding push rod is movably provided with a sliding lever for pushing the connecting bevel gear and the driving bevel gear ring to mesh, and the top end of the sliding lever is fixedly provided with a control switch for starting the driving motor.

[0007] As a kind of preferred of the present application: the side of the motor mounting seat is equidistantly provided with multiple guide through-slots, linear bearing is fixedly installed in the inside of the guide through-slot, guide slide rod is slidably installed in the inside of the linear bearing, the one end of multiple guide slide rods is fixedly connected with slide rod mounting bracket, and the slide rod mounting bracket is fixedly installed in the inside of oil saw shell.

[0008] As a kind of preferred of the present application: the outer wall of the driving main shaft is sleeved with positioning sleeve, mounting bracket is fixedly installed on the outer wall of the positioning sleeve, and the mounting bracket is fixedly installed in the inside of oil saw shell.

[0009] On the basis of the foregoing scheme: limit spring is fixedly installed in the inside of the positioning sleeve, connecting pressure ring is fixedly installed on the one end of the limit spring, and connecting bearing is fixedly installed in the inside of the connecting pressure ring.

[0010] On the basis of the foregoing scheme: mounting inner cylinder is fixedly installed on the inner ring inner wall of the connecting bearing, fixed sleeve is fixedly connected on the end of the mounting inner cylinder, fixed connecting pin is inserted on the side of the fixed sleeve, the fixed sleeve is sleeved on the outer wall of the driving main shaft, and the fixed connecting pin penetrates the driving main shaft.

[0011] As a kind of preferred of the present application: the outer wall of the sliding push rod is slidably sleeved with sliding guide body, and push mounting groove is formed on the tail end of the sliding push rod, and mounting slide pin is fixedly installed in the inside of the push mounting groove.

[0012] On the basis of the foregoing scheme: slide pin sliding slot is formed on the bottom end of the sliding push rod, the mounting slide pin is slidably installed in the inside of the slide pin sliding slot, and rotating pin hole is formed on the middle part of the sliding push rod.

[0013] As a kind of preferred of the present application: the outside of the flywheel and electric starting assembly is provided with protective mounting shell, the protective mounting shell is fixedly installed on one side of oil saw shell and connected with the starting cover shell of oil saw.

[0014] On the basis of the foregoing scheme: guide body clamping seat is fixedly connected in the inside of the tail end of the protective mounting shell, and push rod mounting groove is formed on the tail end of the protective mounting shell, positioning arm support is fixedly connected on the top of the groove wall on both sides of the push rod mounting groove, rotating pin rod is fixedly installed in the inside of the positioning arm support, and the rotating pin rod is installed in the inside of the rotating pin hole.

[0015] On the basis of the foregoing scheme: electric connection body is fixedly installed in the inside of the tail end of the protective mounting shell, battery mounting groove is formed on one side of the electric connection body, storage battery module is fixedly installed in the inside of the battery mounting groove, and the slot opening of the battery mounting groove penetrates the shell of the protective mounting shell and is installed with rubber cover plate.

[0016] The beneficial effects of this invention are as follows: 1. This electric start chainsaw has its drive motor for the electric start component fixed inside the chainsaw housing via a mounting bracket. Components such as the positioning sleeve and connecting bearings are connected by a sleeve or snap-fit ​​method, resulting in a compact structure that is easy to assemble. Compared to existing technologies, it has fewer gear transmission structures, thus minimizing the impact of dust generated during chainsaw operation on the electric start component. At the same time, the protective mounting shell effectively protects the electric start component and reduces the impact of working dust.

[0017] 2. This electric start chainsaw utilizes a clutch structure in its electric start assembly, consisting of a limit spring, connecting bearing, and mounting inner cylinder. During startup, the drive motor engages the connecting bevel gear with the drive bevel gear ring, transmitting torque through the compression of the limit spring. After the engine starts, the limit spring returns to its original elasticity, automatically disengaging the connecting bevel gear from the drive bevel gear ring. This design effectively prevents the motor from being dragged back after the engine starts, preventing the motor from burning out due to overload and significantly extending its service life.

[0018] 3. This electric start chainsaw retains the traditional chain saw's pull-cord manual start structure while adding an electric start component. The two start methods work independently and do not interfere with each other. The electric start uses a drive motor to drive a bevel gear transmission to rotate the flywheel, reducing the difficulty of starting. The manual start serves as a backup, and can still be used normally in case of electric start failure or battery depletion, ensuring the equipment's emergency capability in various scenarios. Attached Figure Description

[0019] Figure 1 This is an exploded view of the components of the electric starter assembly of the present invention. Figure 1 ; Figure 2 This is an exploded view of the components of the electric starter assembly of the present invention. Figure 2 ; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the partial structure at point A in the middle; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure at point B; Figure 5 For the present invention Figure 2 A magnified schematic diagram of the structure at point C in the middle; Figure 6 For the present invention Figure 2 A magnified schematic diagram of the local structure at point D; Figure 7 For the present invention Figure 2 A magnified schematic diagram of the local structure at point E; Figure 8 For the present invention Figure 2 A magnified schematic diagram of the structure at point F in the middle.

[0020] In the diagram: 1. Chainsaw engine; 2. Flywheel; 3. Protective mounting shell; 4. Bearing pad ring; 5. Drive bevel gear ring; 6. Connecting bevel gear; 7. Drive spindle; 8. Drive motor; 9. Motor mounting base; 10. Sliding push rod; 11. Sliding guide body; 12. Sliding lever; 13. Positioning sleeve; 14. Limiting circlip; 15. Mounting bracket; 16. Limiting spring; 17. Connecting pressure ring; 18. Connecting bearing; 19. Mounting inner cylinder; 20. Fixing sleeve; 21. Fixing connecting pin 22. Coupling; 23. Guide slot; 24. Linear bearing; 25. Guide slide rod; 26. Slide rod mounting bracket; 27. Mounting pin; 28. Mounting connecting plate; 29. ​​Push mounting groove; 30. Mounting sliding pin; 31. Sliding pin groove; 32. Rotating pin hole; 33. Control switch; 34. Guide body holder; 35. Lever mounting groove; 36. Positioning arm; 37. Rotating pin; 38. Protective mounting cover; 39. Electrical connector; 40. Battery module; 41. Rubber cover. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] An electric start chainsaw, such as Figures 1 to 8 As shown, the chain saw includes a chainsaw engine 1 and a flywheel 2. The chainsaw engine 1 is fixedly installed inside the chainsaw housing. The flywheel 2 is fixedly installed at one end of the crankshaft of the chainsaw engine 1. The flywheel 2 has an integrally formed mounting truncated cone on the side near the chainsaw engine 1. A drive bevel gear ring 5 is fixedly installed on the outer wall of the mounting truncated cone gear ring 5. An electric starter assembly is provided on one side of the drive bevel gear ring 5. The electric starter assembly is installed on one side of the chainsaw housing and drives the chainsaw engine 1 through the flywheel 2. A bearing pad ring 4 is also provided between the flywheel 2 and the housing of the chainsaw engine 1. The bearing pad ring 4 is fixedly sleeved on the crankshaft of the chainsaw engine 1 to prevent interference with the housing of the chainsaw engine 1 when the electric starter assembly starts the chainsaw engine 1.

[0024] The flywheel 2 and the electric start assembly are provided with a protective mounting shell 3. The protective mounting shell 3 is fixedly installed on one side of the chainsaw housing and connected to the start cover of the chainsaw. The protective mounting shell 3 has an integrally formed mounting cylinder for accommodating the flywheel 2. The inner cavity of the mounting cylinder passes through the protective mounting shell 3. The drawstring start structure inside the start cover is connected to the flywheel 2, which facilitates manual start of the chainsaw.

[0025] The chainsaw described in this application is a conventional chainsaw. An electric start component is added to the existing chainsaw to facilitate electric starting and reduce the difficulty of starting the chainsaw. The original drawstring start structure is retained simultaneously. The two starting methods do not interfere with each other, ensuring safety during use. This application does not fully disclose the chainsaw structure because the chainsaw is existing technology, and this application does not optimize the original structure of the chainsaw. Meanwhile, the protective mounting shell 3 added in this application mainly protects the electric start component, preventing dust generated during chainsaw operation from entering and affecting the normal use of the electric start structure. The structure of the protective mounting shell 3 shown in the attached drawings is only a schematic structure and does not represent the actual structure. It can be adjusted according to actual conditions (e.g., different models of chainsaws).

[0026] The main body of the electric starter assembly is a drive motor 8. A coupling 22 is fixedly installed at the output shaft end of the drive motor 8. A drive spindle 7 is fixedly installed at the end of the coupling 22. A connecting bevel gear 6 is fixedly installed at the end of the drive spindle 7. The connecting bevel gear 6 meshes with the drive bevel gear ring 5. The test drive bevel gear ring 5 drives the flywheel 2 to rotate.

[0027] A positioning sleeve 13 is sleeved on the outer wall of the drive spindle 7. A mounting bracket 15 is fixedly installed on the outer wall of the positioning sleeve 13. The mounting bracket 15 is fixedly installed inside the chainsaw housing. A connecting cylinder is integrally formed at one end of the positioning sleeve 13 near the drive bevel ring 5. A limit ring 14 is fixedly installed on the outer wall of the connecting cylinder.

[0028] The main body of the mounting bracket 15 is a connecting arm plate, which is fixed to the chainsaw housing by bolts. Both ends of the connecting arm plate are integrally formed mounting arms. One mounting arm is fixedly sleeved on the outer wall of the positioning sleeve 13, and the other mounting arm is fixedly snapped into the limiting ring 14, which fully ensures the installation stability of the positioning sleeve 13. The limiting ring 14 and the connecting sleeve are set to interference fit. Under the action of a large external force, the connecting sleeve and the limiting ring 14 can rotate relative to each other, which improves the safety of the structure.

[0029] A limiting spring 16 is fixedly installed inside the positioning sleeve 13. A connecting pressure ring 17 is fixedly installed at one end of the limiting spring 16. A connecting bearing 18 is fixedly installed inside the connecting pressure ring 17. Both the limiting spring 16 and the connecting pressure ring 17 are sleeved on the outer wall of the drive spindle 7.

[0030] An inner mounting cylinder 19 is fixedly installed on the inner wall of the inner ring of the connecting bearing 18. A fixing sleeve 20 is fixedly connected to the end of the inner mounting cylinder 19. A fixing connecting pin 21 is inserted into one side of the fixing sleeve 20. The fixing sleeve 20 is fixedly sleeved on the outer wall of the drive spindle 7. The fixing connecting pin 21 passes through the drive spindle 7.

[0031] The inner cylinder 19 rotates with the drive spindle 7, and at the same time, it can drive the connecting pressure ring 17 to compress the limit spring 16, and the two movements will not interfere with each other; the compressed limit spring 16 can separate the connecting bevel gear 6 from the drive bevel gear ring 5, disengage it, and avoid the start-up chainsaw engine 1 from having an adverse effect on the drive motor 8.

[0032] A motor mounting base 9 is fixedly installed on the outer wall of the drive motor 8. Multiple guide slots 23 are equidistantly opened on one side of the motor mounting base 9. A linear bearing 24 is fixedly installed inside the guide slot 23. A guide slide rod 25 is slidably installed inside the linear bearing 24. One end of the multiple guide slide rods 25 is fixedly connected to a slide rod mounting bracket 26. The slide rod mounting bracket 26 is fixedly installed inside the chainsaw housing.

[0033] The linear bearing 24 enables the motor mounting base 9 to drive the drive motor 8 to slide stably back and forth along the guide slide bar 25, ensuring smooth movement and preventing obstruction. This facilitates quick adjustment of the state between the connecting bevel gear 6 and the drive bevel gear ring 5 in conjunction with the limit spring 16.

[0034] Multiple mounting pins 27 are welded at equal intervals to the tail end of the motor mounting base 9, and a mounting connecting plate 28 is fixedly mounted thereon via the mounting pins 27. A sliding push rod 10 is welded to the back of the mounting connecting plate 28. A sliding guide body 11 is slidably sleeved on the outer wall of the sliding push rod 10. The main body of the sliding guide body 11 is set as a square tube. Multiple connecting rollers are rotatably mounted at equal intervals on the top and bottom of the inner cavity of the square tube. The connecting rollers cooperate with the sliding push rod 10 to ensure the smooth sliding of the sliding push rod 10.

[0035] The sliding push rod 10 has a push mounting groove 29 at its tail end, and a mounting pin 30 is fixedly installed inside the push mounting groove 29; a sliding lever 12 is provided inside the push mounting groove 29, and a sliding pin groove 31 is provided at the bottom end of the sliding lever 12. The mounting pin 30 is slidably installed inside the sliding pin groove 31, and a rotating pin hole 32 is provided in the middle of the sliding lever 12. A control switch 33 is also installed at the top end of the sliding lever 12.

[0036] The control switch 33 is used to control the start and stop of the drive motor 8, and the sliding lever 12 is used to push the sliding push rod 10, which in turn causes the connecting bevel gear 6 and the drive bevel gear ring 5 to mesh.

[0037] The protective mounting shell 3 has a guide body bracket 34 fixedly connected inside its tail end. The sliding guide body 11 is fixedly installed inside the guide body bracket 34. The top of the protective mounting shell 3 has a lever mounting groove 35. The top of the two side walls of the lever mounting groove 35 are fixedly connected to a positioning arm 36. The positioning arm 36 has a rotating pin 37 fixedly installed inside its interior. The rotating pin 37 is installed inside the rotating pin hole 32. The sliding lever 12 deflects about the axis of the rotating pin 37. The top of the sliding lever 12 is covered with a protective mounting cover 38. The protective mounting cover 38 is rotatably connected to the protective mounting shell 3 to protect the sliding lever 12 and prevent accidental contact.

[0038] An electrical connector 39 is fixedly installed inside the tail end of the protective mounting shell 3. A battery mounting slot is provided on one side of the electrical connector 39. A battery module 40 is fixedly installed inside the battery mounting slot. The opening of the battery mounting slot passes through the shell of the protective mounting shell 3 and is covered with a rubber cover 41. The rubber cover 41 is used to seal the opening of the battery mounting slot and protect the battery module 40.

[0039] The battery module 40 is a lithium battery. Positive and negative terminals are installed on the electrical connector 39. One end of the positive and negative terminals is connected to the positive and negative terminals of the battery module 40, and the other end is connected through a wire. The drive motor 8 and the control switch 33 are connected in series on the wire. The control switch 33 is a push-button type. When pressed, the drive motor 8 is powered on. When released, the drive motor 8 is de-powered.

[0040] When using this device, first assemble the electric start assembly as described above and install it on the chainsaw; open the choke (cold start), then open the protective mounting cover 38, grasp the upper part of the sliding lever 12 and deflect it backward. The lower part of the sliding lever 12 pushes the sliding push rod 10 through the mounting pin 30. Under the action of the sliding guide 11, the sliding push rod 10 moves linearly and pushes the motor mounting seat 9. With the cooperation of the linear bearing 24 and the guide slide rod 25, the motor mounting seat 9 pushes the drive motor 8 and the drive spindle 7. The drive spindle 7 causes the connecting pressure ring 17 to compress the limit spring 16 and drive the connecting bevel gear 6 to move closer to the drive bevel gear ring 5 until the connecting bevel gear 6 and the drive bevel gear ring 5 are tightly engaged (the sliding lever 12 can no longer deflect). Then press the control switch 33. When the drive motor 8 is powered on, it drives the connecting bevel gear 6 to rotate at high speed via the drive spindle 7. The connecting bevel gear 6 meshes with the drive spindle 7, which in turn drives the flywheel 2 to rotate. The flywheel 2 drives the crankshaft of the chainsaw engine 1 to rotate, which in turn causes the piston to move. Other parts of the chainsaw work in coordination. When the chainsaw engine 1 starts, the control switch 33 and the sliding lever 12 are released. Under the elastic force of the limit spring 16, the drive bevel ring 5 and the connecting bevel gear 6 separate, and the electric start assembly returns to its initial state (in the initial state, the drive bevel ring 5 and the connecting bevel gear 6 are in a slightly compressed state. When the limit spring 16 returns to its initial state, it is still in a compressed state and will not produce elastic vibration, thus improving the safety of the electric start assembly). The electric start of the chainsaw engine 1 is completed.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electrically started chainsaw, comprising a chainsaw engine (1) and a flywheel (2), wherein the chainsaw engine (1) is fixedly installed inside the chainsaw housing, and the flywheel (2) is fixedly installed at one end of the crankshaft of the chainsaw engine (1), characterized in that: A drive bevel ring (5) is provided on one side of the flywheel (2), and an electric start assembly is provided on one side of the drive bevel ring (5). The electric start assembly is installed on one side of the chainsaw housing, and the electric start assembly drives the chainsaw engine (1) through the flywheel (2). The main body of the electric starter assembly is configured as a drive motor (8), and the output shaft of the drive motor (8) is equipped with a drive spindle (7). The end of the drive spindle (7) is fixedly equipped with a connecting bevel gear (6) that meshes with the drive bevel ring (5). A motor mounting base (9) is fixedly installed on the outer wall of the drive motor (8). A sliding push rod (10) is fixedly installed at the tail end of the motor mounting base (9). A sliding lever (12) for pushing the connecting bevel gear (6) and the drive bevel gear ring (5) to mesh is movably installed at the tail end of the sliding push rod (10). A control switch (33) for starting the drive motor (8) is fixedly installed at the top end of the sliding lever (12).

2. The electrically started chainsaw according to claim 1, characterized in that: The motor mounting base (9) has multiple guide slots (23) equidistantly provided on one side. A linear bearing (24) is fixedly installed inside the guide slot (23). A guide slide rod (25) is slidably installed inside the linear bearing (24). One end of the multiple guide slide rods (25) is fixedly connected to a slide rod mounting bracket (26). The slide rod mounting bracket (26) is fixedly installed inside the chainsaw housing.

3. The electrically started chainsaw according to claim 1, characterized in that: The outer wall of the drive spindle (7) is fitted with a positioning sleeve (13), and the outer wall of the positioning sleeve (13) is fixedly mounted with a mounting bracket (15), which is fixedly installed inside the chainsaw housing.

4. The electrically started chainsaw according to claim 3, characterized in that: A limiting spring (16) is fixedly installed inside the positioning sleeve (13), and a connecting pressure ring (17) is fixedly installed at one end of the limiting spring (16). A connecting bearing (18) is fixedly installed inside the connecting pressure ring (17).

5. The electrically started chainsaw according to claim 4, characterized in that: The inner ring of the connecting bearing (18) is fixedly installed with an inner cylinder (19), and a fixed sleeve (20) is fixedly connected to the end of the inner cylinder (19). A fixed connecting pin (21) is inserted into one side of the fixed sleeve (20), and the fixed sleeve (20) is fixedly sleeved on the outer wall of the drive spindle (7). The fixed connecting pin (21) passes through the drive spindle (7).

6. The electrically started chainsaw according to claim 1, characterized in that: The outer wall of the sliding push rod (10) is slidably sleeved with a sliding guide (11), and the tail end of the sliding push rod (10) is provided with a push mounting groove (29), and a mounting pin (30) is fixedly installed inside the push mounting groove (29).

7. An electrically started chainsaw according to claim 6, characterized in that: The bottom end of the sliding lever (12) is provided with a sliding pin groove (31), the mounting pin (30) is slidably installed inside the sliding pin groove (31), and the middle part of the sliding lever (12) is provided with a rotating pin hole (32).

8. The electrically started chainsaw according to claim 1, characterized in that: The flywheel (2) and the electric start assembly are provided with a protective mounting shell (3), which is fixedly installed on one side of the chainsaw housing and connected to the start cover of the chainsaw.

9. An electrically started chainsaw according to claim 8, characterized in that: The protective mounting shell (3) is fixedly connected to the interior of the tail end of the protective mounting shell (3), and the tail end of the protective mounting shell (3) is provided with a lever mounting groove (35). The top of the groove walls on both sides of the lever mounting groove (35) is fixedly connected to a positioning arm (36). The positioning arm (36) is fixedly installed with a rotating pin (37), and the rotating pin (37) is installed inside the rotating pin hole (32).

10. An electrically started chainsaw according to claim 8, characterized in that: An electrical connector (39) is fixedly installed inside the tail end of the protective mounting shell (3). A battery mounting slot is provided on one side of the electrical connector (39). A battery module (40) is fixedly installed inside the battery mounting slot. The slot opening of the battery mounting slot passes through the shell of the protective mounting shell (3) and is fitted with a rubber cover plate (41).

Images