chain saw

Abstract

The application discloses a chain saw, which comprises a casing, a chain wheel and a locking mechanism. The chain wheel is installed in the casing, and the locking mechanism is installed on the casing and is operable to lock or unlock the rotation of the chain wheel. The locking mechanism comprises a brake handle, a hinge assembly in transmission connection with the brake handle, a mounting seat in transmission connection with the hinge assembly, an elastic member arranged on the side of the mounting seat away from the hinge assembly, and a hoop arranged on the periphery of the chain wheel, the two ends of the hoop being connected to the casing and the mounting seat respectively. A dustproof member is arranged between the mounting seat and the elastic member. The casing further comprises a receiving cavity for accommodating at least part of the locking mechanism. The dustproof member divides the receiving cavity into a first chamber for accommodating the chain wheel and a second chamber for accommodating the hinge assembly. In the use of the chain saw, the dustproof member can prevent some dust from entering the first chamber from the second chamber, so as to ensure that the locking position of the hinge assembly does not change. Therefore, the normal triggering of the brake mechanism can be ensured, and the safety hazard is reduced.

Description

Technical Field

[0001] This application belongs to the field of tool technology, specifically relating to a chainsaw. Background Technology

[0002] As a power tool widely used in logging and cutting operations, the reliability of the braking mechanism of a chainsaw directly affects the safety of the operator. Existing chainsaw braking mechanisms typically include components such as a brake clamp, brake spring, spring seat, and hinge assembly. In actual use, chainsaws are often in harsh environments with flying dust and sawdust. Fine particles and sawdust can easily enter the cavity containing the hinge assembly from the rotating sprocket. The accumulation of dust and impurities can alter the original locking position of the hinge assembly. This alteration reduces the operating force required to trigger the braking mechanism, thereby increasing the risk of unintentional activation during normal operation and creating a safety hazard.

[0003] Therefore, it is necessary to provide a chainsaw to address the aforementioned technical problems. Utility Model Content

[0004] The purpose of this application is to provide a chainsaw that can solve the problem that the braking mechanism of existing chainsaws is unintentionally triggered because the locking position of the hinge assembly is changed due to the intrusion of dust and impurities.

[0005] To achieve the above objectives, a specific embodiment of this application provides the following technical solution:

[0006] A chainsaw includes a housing, a sprocket, and a locking mechanism. The sprocket is installed inside the housing. The locking mechanism is installed in the housing and is operable to lock or unlock the rotation of the sprocket.

[0007] The locking mechanism includes a brake handle, a hinge assembly pulverizedly connected to the brake handle, a mounting base pulverizedly connected to the hinge assembly, an elastic element disposed on the side of the mounting base away from the hinge assembly, and a clamp disposed on the periphery of the sprocket, the two ends of the clamp being respectively connected to the housing and the mounting base;

[0008] A dustproof component is provided between the mounting base and the elastic element. The housing also includes a receiving cavity for accommodating at least a portion of the locking mechanism. The dustproof component divides the receiving cavity into a first chamber for accommodating the sprocket and a second chamber for accommodating the hinge assembly.

[0009] In one or more embodiments of this application, the housing includes a base plate, a cover plate, and a partition plate disposed between the base plate and the cover plate, and the receiving cavity is formed by at least the base plate, the cover plate, and the partition plate.

[0010] In one or more embodiments of this application, the dustproof component is fixedly connected to the mounting base, and the dustproof component is interference-fitted into the receiving cavity.

[0011] In one or more embodiments of this application, the dustproof component is provided with a porous structure for adsorbing dust.

[0012] In one or more embodiments of this application, the dustproof component is configured as at least one of wool felt, polyester felt, or nylon fabric.

[0013] In one or more embodiments of this application, a snap-fit ​​plate is provided inside the housing, the snap-fit ​​plate is located on the periphery of the sprocket, the fixed end of the clamp is fixedly connected to the snap-fit ​​plate, and the free end of the clamp is fixedly connected to the mounting base and moves with the mounting base.

[0014] In one or more embodiments of this application, the fixed end of the clamp is fixed to the snap-fit ​​plate by a locking pin, and the free end of the clamp is fixed to the mounting base by a locking pin.

[0015] In one or more embodiments of this application, the mounting base has a positioning post protruding from one end facing the elastic member, and the elastic member is configured as a spring sleeved on the outer periphery of the positioning post.

[0016] In one or more embodiments of this application, the hinge assembly includes an active paddle and a driven paddle that are pivotally connected to each other, the active paddle being pivotally connected to the brake handle and the driven paddle being pivotally connected to the mounting base.

[0017] In one or more embodiments of this application, the brake handle is connected to a rotating shaft, the active paddle is pivotally connected to the rotating shaft, and an abutment is provided at the end of the rotating shaft. The abutment includes a groove, and the groove includes a first groove wall and a second groove wall disposed opposite to each other for abutting and driving the active paddle to rotate.

[0018] Compared to existing technologies, the chainsaw of this application, when locked, triggers the brake handle, causing the hinge assembly to rotate, thereby moving the mounting base and causing the clamp to grip the sprocket to stop its rotation. During use, the dustproof component prevents some dust from entering the first chamber from the second chamber, thus avoiding dust accumulation in the first chamber, ensuring that the locked position of the hinge assembly remains unchanged, and further ensuring the normal triggering of the brake mechanism. Therefore, the chainsaw of this application improves the reliability and safety of the locking mechanism, extends the chainsaw's service life, and reduces safety hazards. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the chainsaw structure in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the disassembled casing of a chainsaw in one embodiment of this application;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a structural diagram of the locking mechanism of a chainsaw in one embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the sprocket and locking mechanism of a chainsaw in one embodiment of this application;

[0025] Figure 6 This is an exploded view of the locking mechanism of a chainsaw in one embodiment of this application.

[0026] Explanation of key figure labels:

[0027] 1. Housing; 11. Snap-fit ​​plate; 12. First chamber; 13. Second chamber; 14. Base plate; 15. Cover plate; 16. Partition plate; 2. Sprocket; 3. Locking mechanism; 31. Brake handle; 32. Hinge assembly; 321. Active lever; 322. Driven lever; 33. Mounting base; 34. Elastic element; 35. Clamp; 36. Rotating shaft; 37. Abutment element; 371. First groove wall; 372. Second groove wall; 38. Positioning post; 4. Dustproof element; 5. Handle. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0029] Reference Figure 1 and Figure 2The chainsaw in one embodiment of this application includes a housing 1, a sprocket 2, and a locking mechanism 3. The sprocket 2 is installed inside the housing 1, and the locking mechanism 3 is installed in the housing 1 and is operable to lock or unlock the rotation of the sprocket 2.

[0030] Reference Figures 2 to 4 The locking mechanism 3 includes a brake handle 31, a hinge assembly 32 that is pulsatorically connected to the brake handle 31, a mounting base 33 that is pulsatorically connected to the hinge assembly 32, an elastic element 34 disposed on the side of the mounting base 33 away from the hinge assembly 32, and a clamp 35 disposed on the periphery of the sprocket 2. The two ends of the clamp 35 are respectively connected to the housing 1 and the mounting base 33.

[0031] Reference Figure 2 and Figure 3 The tail of the chainsaw housing 1 has a grip, and a handle 5 is connected to the outer periphery of the housing 1. During operation, the user holds the grip at the tail of the chainsaw with one hand and the handle 5 with the other. When the user uses the chainsaw, if the chainsaw hits a hard object, it may spring back, posing a risk of injury. When this happens, the arm holding the handle 5 will press against the brake handle 31, causing the hinge assembly 32 to rotate, moving the mounting base 33, and ultimately clamping the sprocket 2 through the clamp 35 to stop its rotation, thus reducing the risk of injury to the user.

[0032] Reference Figure 3 and Figure 4 The hinge assembly 32 includes an active paddle 321 and a driven paddle 322 pivotally connected to each other. The active paddle 321 is pivotally connected to the brake handle 31, and the driven paddle 322 is pivotally connected to the mounting base 33. The brake handle 31 is connected to a rotating shaft 36, and the active paddle 321 is pivotally connected to the rotating shaft 36. An abutment 37 is provided at the end of the rotating shaft 36. The abutment 37 includes a groove, which includes a first groove wall 371 and a second groove wall 372 disposed opposite to each other, for abutting and driving the active paddle 321 to rotate.

[0033] Therefore, when rebound occurs, the brake handle 31 rotates clockwise, causing the abutment 37 to rotate. The first groove wall 371 of the abutment 37 pushes the active paddle 321 and the driven paddle 322 to rotate adaptively, thereby causing the mounting base 33 to move and stretching the clamp 35 to grip the sprocket 2. Similarly, when the brake handle 31 rotates counterclockwise, the second groove wall 372 of the abutment 37 pushes the active paddle 321 and the driven paddle 322 to rotate and reset, thereby causing the mounting base 33 to reset.

[0034] Reference Figure 4 and Figure 5The housing 1 contains a snap-fit ​​plate 11 located around the sprocket 2. The fixed end of the clamp 35 is fixedly connected to the snap-fit ​​plate 11, and the free end of the clamp 35 is fixedly connected to the mounting base 33 and moves with the mounting base 33. Specifically, the fixed end of the clamp 35 is fixed to the snap-fit ​​plate 11 by a locking pin, and the free end of the clamp 35 is fixed to the mounting base 33 by a locking pin.

[0035] Reference Figure 4 and Figure 5 A dustproof component 4 is provided between the mounting base 33 and the elastic element 34. The housing 1 also includes a receiving cavity for accommodating at least part of the locking mechanism 3. The dustproof component 4 divides the receiving cavity into a first chamber 12 for accommodating the sprocket 2 and a second chamber 13 for accommodating the hinge assembly 32.

[0036] In actual use, chainsaws are often in harsh environments with flying dust and sawdust. Fine particles and sawdust can easily enter the hinge assembly 32 from the rotating sprocket 2. In this embodiment, dust or fine particles can easily move from the second chamber 13 to the first chamber 12, thereby causing a change in the locking position of the hinge assembly 32 and affecting the normal triggering of the locking mechanism 3.

[0037] Among them, combined Figure 3 It should be noted that the locking position of the hinge assembly 32 is when the hinge points of the active and driven paddles 321 and 322 abut against the inner wall of the receiving cavity (i.e., the partition 16), and the clamp 35 is in the unlocked state. Conversely, when the hinge point moves away from the partition 16, the clamp 35 can be driven to clamp the sprocket 2. Therefore, when wood chips accumulate between the inner wall and the hinge point, the wood chips raise the height of the hinge point, making the angle of the obtuse angle formed on both sides of the hinge point larger, and the force that triggers the displacement of the hinge point smaller. Thus, during normal use, there is a risk of unintentionally triggering the brake handle 31. Therefore, in this application, by providing a dustproof component 4 between the mounting base 33 and the elastic element 34, dust and other impurities can be prevented from entering the hinge assembly 32, thereby ensuring the normal triggering of the locking mechanism 3.

[0038] Reference Figure 2 and Figure 3 The housing 1 includes a base plate 14, a cover plate 15, and a partition plate 16 disposed between the base plate 14 and the cover plate 15. The receiving cavity is formed by at least the base plate 14, the cover plate 15, and the partition plate 16. A dustproof component 4 is fixedly connected to the mounting base 33, and the dustproof component 4 is interference-fitted into the receiving cavity to minimize the entry of dust into the first chamber 12. The dustproof component 4 can be fixed to the mounting base 33 by means of adhesive bonding or other methods.

[0039] Reference Figure 5The dustproof component 4 is provided with a porous structure for adsorbing dust. Specifically, the dustproof component 4 can be at least one of wool felt, polyester fiber felt, or nylon fiber cloth. In this embodiment, wool felt is used as an example for illustrative purposes. The wool felt thickness can be 3±2 mm, and the density can be 0.4±0.2 g / cm³. It is understood that in other embodiments, the dustproof component 4 can also be one or a combination of two of wool felt, polyester fiber felt, or nylon fiber cloth, or other novel materials with porous structures to ensure dustproof effect and durability.

[0040] By incorporating a dustproof component 4, this application ensures that the locking mechanism 3 operates flexibly under complex working conditions, thereby improving the reliability and safety of the locking mechanism 3, extending the service life of the chainsaw, and reducing production costs.

[0041] Reference Figure 5 and Figure 6 In one optional embodiment, the mounting base 33 has a positioning post 38 protruding from one end facing the elastic member 34, and the elastic member 34 is configured as a spring sleeved on the outer periphery of the positioning post 38. The positioning post 38 can restrict the position of the elastic member 34. It is understood that the dustproof member 4 can be provided with a clearance hole to avoid the positioning post 38.

[0042] In other embodiments, a labyrinthine dustproof groove or a dustproof cover can be designed on the surface of the mounting base 33 to reduce the impact of dust on the braking effect of the locking mechanism 3. Furthermore, in conjunction with the chainsaw of this application, a sensor can be installed to detect the degree of dust adhesion on the dustproof component 4 to alert the user to replace or clean the dustproof component 4 in a timely manner.

[0043] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chainsaw, characterized in that, include Casing (1); A sprocket (2) is installed inside the housing (1); A locking mechanism (3) is installed on the housing (1) and is operable to lock or unlock the rotation of the sprocket (2); The locking mechanism (3) includes a brake handle (31), a hinge assembly (32) that is throttle connected to the brake handle (31), a mounting base (33) that is throttle connected to the hinge assembly (32), an elastic element (34) disposed on the side of the mounting base (33) away from the hinge assembly (32), and a clamp (35) disposed on the periphery of the sprocket (2). The two ends of the clamp (35) are respectively connected to the housing (1) and the mounting base (33). A dustproof component (4) is provided between the mounting base (33) and the elastic element (34). The housing (1) also includes a receiving cavity that accommodates at least part of the locking mechanism (3). The dustproof component (4) divides the receiving cavity into a first chamber (12) that accommodates the sprocket (2) and a second chamber (13) that accommodates the hinge assembly (32).

2. The chainsaw according to claim 1, characterized in that, The housing (1) includes a base plate (14), a cover plate (15), and a partition plate (16) disposed between the base plate (14) and the cover plate (15). The receiving cavity is formed by at least the base plate (14), the cover plate (15), and the partition plate (16).

3. The chainsaw according to claim 2, characterized in that, The dustproof component (4) is fixedly connected to the mounting base (33), and the dustproof component (4) is interference-fitted into the receiving cavity.

4. The chainsaw according to claim 1, characterized in that, The dustproof component (4) is provided with a porous structure that adsorbs dust.

5. The chainsaw according to claim 4, characterized in that, The dustproof component (4) is made of at least one of wool felt, polyester felt, or nylon fabric.

6. The chainsaw according to claim 1, characterized in that, The housing (1) is provided with a snap-fit ​​plate (11), which is located on the periphery of the sprocket (2). The fixed end of the clamp (35) is fixedly connected to the snap-fit ​​plate (11), and the free end of the clamp (35) is fixedly connected to the mounting base (33) and moves with the mounting base (33).

7. The chainsaw according to claim 6, characterized in that, The fixed end of the clamp (35) is fixed to the snap plate (11) by a locking pin, and the free end of the clamp (35) is fixed to the mounting base (33) by a locking pin.

8. The chainsaw according to claim 1, characterized in that, The mounting base (33) has a positioning post (38) protruding from one end facing the elastic member (34), and the elastic member (34) is configured as a spring sleeved on the outer periphery of the positioning post (38).

9. The chainsaw according to claim 1, characterized in that, The hinge assembly (32) includes an active paddle (321) and a driven paddle (322) pivotally connected to each other. The active paddle (321) is pivotally connected to the brake handle (31), and the driven paddle (322) is pivotally connected to the mounting base (33).

10. The chainsaw according to claim 9, characterized in that, The brake handle (31) is connected to a rotating shaft (36), and the active paddle (321) is pivotally connected to the rotating shaft (36). The end of the rotating shaft (36) is provided with an abutment (37), which includes a groove. The groove includes a first groove wall (371) and a second groove wall (372) disposed opposite to each other, for abutting and driving the active paddle (321) to rotate.

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