A wide voltage controlled lithium battery chain saw

Abstract

The utility model discloses a wide voltage controlled lithium battery chain saw, comprising a chain saw body, a saw chain arranged on the chain saw body, and a protective cover, wherein the protective cover is located above the saw chain and covers the upper half of the chain saw inside, the protective cover is rotatably connected to the chain saw body, a ratchet is arranged on the protective cover, a pawl cooperating with the ratchet is rotatably arranged on the chain saw body, when the rotating pawl is stuck on the ratchet teeth, the protective cover can be rotated forward to make the free end away from the saw chain; when the rotating pawl is disengaged from the ratchet teeth, the protective cover can be rotated reversely to make the free end of the protective cover return to the initial position. Compared with the prior art, the utility model has the advantage that the protective cover can be unfolded at different angles as needed, and the stability of the protective cover will not be affected by wear during multiple unfolding processes.

Description

Technical Field

[0001] The utility model relates to the technical field of electric chain saws, in particular to a wide voltage controlled lithium chain saw. Background Art

[0002] An electric chain saw is an electric tool with a saw chain. It processes wood by driving the toothed chain to rotate. It is mainly used for felling, chipping and trimming wood. However, traditional electric chain saws will produce wood chips during use. The wood chips will follow the rotation of the saw chain and fly onto the user, injuring the user. To solve this problem, some electric chain saws with protective covers have appeared on the market.

[0003] For example, the Chinese utility model patent "A Chain Saw Safety Shield" with patent publication number CN214394629U includes a chain saw body and a saw chain arranged on the chain saw body, an irregular shield is arranged above the saw chain to cover the upper half of the saw chain and has no contact with the saw chain, a sleeve hole and a torsion spring installed in the sleeve hole are provided on the chain saw body, and a sleeve is added to the sleeve hole after the sleeve hole, torsion spring and protective cover are assembled, and the sleeve is fixed with a hexagonal screw.

[0004] In the above scheme, when using an electric chain saw or cleaning wood chips under the protective cover, the hexagonal screw needs to be loosened before the cleaning is completed. Repeated tightening of the hexagonal screw will cause wear, thereby affecting the stability of the protective cover. Utility Model Content

[0005] The utility model aims at solving the problem that the protective cover of an electric chain saw is fixed by screws and repeated twisting of the hexagonal screws will cause wear and affect the stability of the protective cover. The utility model provides a wide voltage controlled lithium chain saw to solve the above problem.

[0006] The utility model adopts the following technical solution to solve the above technical problems: a wide voltage controlled lithium battery chain saw, comprising a chain saw body, a saw chain and a protective cover arranged on the chain saw body, wherein the protective cover is located above the saw chain and covers the upper part of the chain saw inside, the protective cover is rotatably connected to the chain saw body, a ratchet is arranged on the protective cover, a pawl cooperating with the ratchet is rotatably arranged on the chain saw body, when the rotating pawl is stuck on the ratchet teeth, the protective cover can be rotated forward to make the free end away from the saw chain; when the rotating pawl is disengaged from the ratchet teeth, the protective cover can be rotated reversely to make the free end of the protective cover return to the initial position.

[0007] A further preferred solution of the utility model is: the pawl comprises a first pawl and a second pawl, the first pawl and the second pawl are integrally formed, and the connecting end of the driving knob is fixed at the intersection of the first pawl and the second pawl.

[0008] A further preferred solution of the present invention is that the first pawl and the second pawl form an L-shape or a V-shape.

[0009] A further preferred solution of the utility model is that the chain saw body comprises a body and a guide plate arranged on one side of the body, and the saw chain is rotatably arranged on the guide plate and is driven to rotate by a driving mechanism inside the body.

[0010] A further preferred scheme of the utility model is: an installation chamber is provided in the body, the pawl is provided in the installation chamber, the installation chamber has an installation hole connected to the outside, the pawl is provided with a driving knob extending from the installation hole to the outside of the installation chamber, a strip hole is provided on the top of the installation chamber, the ratchet part extends into the installation chamber through the strip hole to cooperate with the pawl, and rotating the driving knob can drive the pawl to rotate and get stuck in or disengage from the ratchet teeth.

[0011] A further preferred solution of the utility model is that the driving knob is partially located in the mounting hole, the driving knob is eccentrically arranged relative to the mounting hole, and when the driving knob and the inner wall of the mounting hole are in a clamping state, the pawl is clamped on the ratchet teeth.

[0012] A further preferred solution of the utility model is that a torsion spring is arranged between the ratchet teeth and the inner wall of the installation chamber, one free end of the torsion spring abuts against the ratchet pawl, and the other free end abuts against the inner wall of the installation chamber.

[0013] A further preferred solution of the utility model is: when the driving knob is rotated to make the first pawl engage with the ratchet teeth, the second pawl disengages from the ratchet teeth, and the protective cover can rotate forward; when the driving knob is rotated to make the second pawl engage with the ratchet teeth, the first pawl disengages from the ratchet teeth, and the protective cover can rotate reversely.

[0014] A further preferred solution of the utility model is: a battery box, a circuit board, a motor and a transmission mechanism are arranged inside the body, the battery box is electrically connected to the circuit board, the circuit board is electrically connected to the motor, the output end of the motor is connected to the transmission mechanism, and the output end of the transmission mechanism is connected to the saw chain.

[0015] A further preferred solution of the utility model is: a lithium battery is arranged in the battery box, and a wide voltage circuit is arranged in the circuit board.

[0016] Compared with the prior art, the utility model has the following advantages: the ratchet on the protective cover cooperates with the pawl on the chain saw body, and when the rotating pawl is stuck on the ratchet teeth, the protective cover can be rotated forward to make the free end away from the saw chain, thereby opening the protective cover. At this time, the chain saw can be used normally or the wood chips under the protective cover can be cleaned; when the rotating pawl is disengaged from the ratchet teeth, the protective cover can be rotated reversely to make the free end of the protective cover return to the initial position. The protective cover can be unfolded to different angles as needed, and the stability of the protective cover will not be affected by wear during multiple unfolding processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be regarded as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of the utility model;

[0019] Figure 2 This is the preferred embodiment of the utility model Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 This is a bottom view of a preferred embodiment of the utility model;

[0021] Figure 4 This is the preferred embodiment of the utility model Figure 3 Sectional view at AA in the middle;

[0022] Figure 5 This is the preferred embodiment of the utility model Figure 4 A partial enlarged view of point B in the middle;

[0023] Figure 6 It is an exploded view of the ratchet and pawl of the preferred embodiment of the utility model and the protective cover;

[0024] Figure 7 This is the preferred embodiment of the utility model Figure 6 A partial enlarged view of point C in the middle;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the ratchet and the pawl in the preferred embodiment of the utility model;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the left casing of the fuselage according to the preferred embodiment of the utility model.

[0027] In the figure: 1. chain saw body; 11. body; 111. mounting chamber; 112. mounting hole; 113. driving knob; 114. left housing; 115. right housing; 12. guide plate; 13. saw chain; 14. pawl; 141. first pawl; 142. second pawl; 2. protective cover; 21. ratchet; 3. torsion spring. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0029] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0030] This embodiment mainly describes a wide voltage controlled lithium battery chain saw, as follows:

[0031] like Figures 1 to 9 As shown, a wide voltage controlled lithium chain saw comprises a chain saw body 1, a saw chain 13 and a protective cover 2 arranged on the chain saw body 1, wherein the protective cover 2 is mainly used to prevent wood chips from flying and causing harm to the operator during the use of the electric chain saw, wherein the protective cover 2 is rotatably arranged on the chain saw body 1 and is located above the saw chain 13 to cover the upper half of the chain saw inside, wherein the protective cover 2 is rotatably connected to the chain saw body 1, wherein a ratchet 21 is arranged on the protective cover 2, wherein the ratchet 21 is fixedly connected to the protective cover 2, and wherein a ratchet pawl cooperating with the ratchet 21 is rotatably arranged on the chain saw body 1 14. When the rotating pawl 14 is stuck on the teeth of the ratchet 21, the protective cover 2 can be rotated forward to make the free end of the protective cover 2 away from the saw chain 13, so as to open the protective cover 2. At this time, the chain saw can be used normally or the wood chips under the protective cover 2 can be cleaned. During the opening process of the protective cover 2, due to the action of the pawl 14, the ratchet 21 cannot be reversed, and the protective cover 2 can be opened to a suitable position, which is convenient for cleaning the saw chain 13 under the protective cover 2; when the rotating pawl 14 is disengaged from the teeth of the ratchet 21, the protective cover 2 can be reversed to make the free end of the protective cover 2 return to the initial position. The protective cover 2 can be unfolded at different angles as needed, and the stability of the protective cover 2 will not be affected by wear during multiple unfolding processes.

[0032] like Figure 1 , Figure 3 and Figure 4 As shown, the chain saw body 1 includes a body 11 and a guide plate 12 arranged on one side of the body 11, the saw chain 13 is rotatably arranged on the guide plate 12 and is driven to rotate by a driving mechanism inside the body 11, and the body 11 includes a left housing 114 and a right housing 115, and the left housing 114 and the right housing 115 are plugged into each other.

[0033] like Fig. 9 As shown, the body 11 is provided with an installation chamber 111, and the installation chamber 111 is located on the body 11 on the side where the ratchet 21 is located. When the ratchet 21 is located on the left side of the protective cover 2, the installation chamber 111 is located on the left housing 114, and when the ratchet 21 is located on the right side of the protective cover 2, the installation chamber 111 is located on the right housing 115. Figure 4 and Figure 5 As shown, the pawl 14 is arranged in the installation chamber 111, and the installation chamber 111 has a mounting hole 112 connected to the outside. The pawl 14 is provided with a driving knob 113 extending from the mounting hole 112 to the outside of the installation chamber 111. The top of the installation chamber 111 is provided with a strip hole, and the ratchet 21 part extends into the installation chamber 111 through the strip hole to cooperate with the pawl 14. When the driving knob 113 is rotated, the pawl 14 can be driven to rotate and get stuck in or disengage from the teeth of the ratchet 21, thereby realizing the free opening and closing of the protective cover 2. The driving knob 113 can also be a bolt.

[0034] Preferably, the driving knob 113 is partially located in the mounting hole 112, and the driving knob 113 is eccentrically arranged relative to the mounting hole 112. When the driving knob 113 and the inner wall of the mounting hole 112 are in a clamping state, the pawl 14 is clamped on the teeth of the ratchet 21, and the ratchet 21 can rotate forward to open the protective cover 2. When the driving knob 113 is rotated to release the clamping state, the driving pawl 14 is disengaged from the teeth of the ratchet 21, and the ratchet 21 rotates reversely to cover the protective cover 2 above the saw chain 13.

[0035] like Figure 6 , Figure 7 and Figure 8 As shown, a torsion spring 3 is provided between the teeth of the ratchet wheel 21 and the inner wall of the mounting chamber 111, one free end of the torsion spring 3 abuts against the pawl 14, and the other free end abuts against the inner wall of the mounting chamber 111, the pawl 14 includes a first pawl 141 and a second pawl 142, the first pawl 141 and the second pawl 142 are integrally formed, the first pawl 141 and the second pawl 142 form a V shape, a connecting hole is provided at the intersection of the first pawl 141 and the second pawl 142, the torsion spring 3 is arranged in the connecting hole, the driving rotary The connecting end of the button 113 extends into the connecting hole and is fixedly connected to the pawl, and the torsion spring 3 is sleeved on the connecting end of the driving knob 113. When the driving knob 113 is rotated and clamped with the mounting hole 112, the first pawl 141 is clamped on the teeth of the ratchet 21, the torsion spring 3 is squeezed, the second pawl 142 is disengaged from the teeth of the ratchet 21, and the protective cover 2 can rotate forward; when the driving knob 113 is rotated to release the clamping, under the elastic force of the torsion spring 3, the second pawl 142 rotates and clamps on the teeth of the ratchet 21, the first pawl 141 is disengaged from the teeth of the ratchet 21, and the protective cover 2 can rotate reversely.

[0036] Preferably, a battery box, a circuit board, a motor and a transmission mechanism are provided inside the body 11. The battery box is electrically connected to the circuit board, the circuit board is electrically connected to the motor, the motor output end is connected to the transmission mechanism, the transmission mechanism output end is connected to the saw chain 13, the battery box transmits energy to the motor via the circuit board, the motor rotates to drive the transmission mechanism, and the transmission mechanism output end drives the saw chain 13 to rotate to cut the wood. A lithium battery is provided in the battery box, and a wide voltage circuit is provided in the circuit board, so that the electric chain saw can work normally within a wide voltage range. The wide voltage circuit is a conventional technical means in the art, and the wide voltage circuit content in Patent Publication No. CN201789422U can be referred to.

[0037] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0038] The above is a detailed introduction to a wide voltage controlled lithium battery chain saw provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A wide voltage controlled lithium battery chain saw, comprising a chain saw body, a saw chain arranged on the chain saw body and a protective cover, wherein the protective cover is located above the saw chain and covers the upper half of the chain saw inside, and is characterized in that: The protective cover is rotatably connected to the chain saw body, a ratchet is provided on the protective cover, and a pawl cooperating with the ratchet is rotatably provided on the chain saw body. When the rotating pawl is stuck on the ratchet teeth, the protective cover can be rotated forward to make the free end away from the saw chain; when the rotating pawl is disengaged from the ratchet teeth, the protective cover can be rotated reversely to make the free end of the protective cover return to the initial position.

2. A wide voltage controlled lithium battery chain saw according to claim 1, characterized in that: The chain saw body comprises a body and a guide plate arranged at one side of the body, and the saw chain is rotatably arranged on the guide plate and is driven to rotate by a driving mechanism inside the body.

3. A wide voltage controlled lithium battery chain saw according to claim 2, characterized in that: An installation chamber is provided on the body, the pawl is provided in the installation chamber, the installation chamber has an installation hole connected to the outside, the pawl is provided with a driving knob extending from the installation hole to the outside of the installation chamber, a strip hole is provided on the top of the installation chamber, the ratchet part extends into the installation chamber through the strip hole to cooperate with the pawl, and rotating the driving knob can drive the pawl to rotate and get stuck in or disengage from the ratchet teeth.

4. A wide voltage controlled lithium battery chain saw according to claim 3, characterized in that: The pawl comprises a first pawl and a second pawl, the first pawl and the second pawl are integrally formed, and the connecting end of the driving knob is fixed at the intersection of the first pawl and the second pawl.

5. A wide voltage controlled lithium battery chain saw according to claim 4, characterized in that: The first pawl and the second pawl form a V shape.

6. A wide voltage controlled lithium battery chain saw according to claim 3, characterized in that: The driving knob is partially located in the mounting hole. The driving knob is eccentrically arranged relative to the mounting hole. When the driving knob and the inner wall of the mounting hole are in a clamping state, the pawl is clamped on the ratchet teeth.

7. A wide voltage controlled lithium battery chain saw according to claim 4, characterized in that: A torsion spring is arranged between the ratchet teeth and the inner wall of the installation chamber, wherein one free end of the torsion spring abuts against the ratchet pawl, and the other free end abuts against the inner wall of the installation chamber.

8. A wide voltage controlled lithium battery chain saw according to claim 7, characterized in that: When the driving knob is rotated to make the first pawl engage with the ratchet teeth, the second pawl disengages from the ratchet teeth, and the protective cover can rotate forward; when the driving knob is rotated to make the second pawl engage with the ratchet teeth, the first pawl disengages from the ratchet teeth, and the protective cover can rotate reversely.

9. A wide voltage controlled lithium battery chain saw according to claim 2, characterized in that: A battery box, a circuit board, a motor and a transmission mechanism are arranged inside the fuselage. The battery box is electrically connected to the circuit board, the circuit board is electrically connected to the motor, the output end of the motor is connected to the transmission mechanism, and the output end of the transmission mechanism is connected to the saw chain.

10. A wide voltage controlled lithium battery chain saw according to claim 9, characterized in that: The battery box is provided with a lithium battery, and the circuit board is provided with a wide voltage circuit.

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