A safety guard for chainsaws

Abstract

This utility model discloses a safety cover for a chainsaw, comprising: a chainsaw body, a support frame plate fixedly connected to one end of the upper part of the chainsaw body, a multi-level protective cover mechanism on the top of the support frame plate, a fixed spool at the front end of the multi-level protective cover mechanism, and a retraction mechanism at the other end of the upper part of the chainsaw body. This utility model uses a reset spring to automatically unfold each level of the protective cover, forming a full-area protective barrier, effectively blocking flying debris, preventing accidental contact, and improving operational safety. The motor-driven spool can flexibly control the partial or complete retraction of the protective cover, quickly switching between protective states, saving adjustment time, and adapting to precision operations and multi-angle cutting. When idle, pushing the sliding block unfolds and retracts the folded protective cover, covering the saw chain to prevent accidental contact, dust and rust prevention, reduce collision and wear, and extend the saw chain's lifespan. Rotating the handle block simultaneously completes the installation and locking of the protective cover, making operation convenient. Retraction is achieved by rotating in the opposite direction for easy storage.

Description

Technical Field

[0001] This utility model relates to the technical field of chainsaw protective cover equipment, specifically a safety protective cover for chainsaws. Background Technology

[0002] A chainsaw is a handheld logging tool powered by a gasoline engine. It consists of an engine, transmission mechanism, and sawing mechanism, and can efficiently cut trees. It is widely used in forestry logging, garden pruning and other scenarios. The safety guard for the chainsaw is an important safety accessory. It is usually installed around the sawing mechanism. It can effectively block flying sawdust, wood chips and saw chainsaw chains that may break off and fly out when the chainsaw is working, so as to prevent these objects from causing injury to the operator.

[0003] For example, a protective cover for a chainsaw disclosed in Chinese patent literature (publication number: CN208300397U) protects the chainsaw by combining the protective cover with the chainsaw, which is conducive to heat dissipation and preventing burns, extending the continuous use time of the chainsaw and improving production efficiency.

[0004] However, the design of using a fixed protective cover to achieve basic isolation has limitations. It can only protect specific parts of the chainsaw and cannot cover the entire working area of ​​the chainsaw chain. Furthermore, it cannot adjust the protection range according to the cutting scenario. If the protection range needs to be changed, it may be necessary to disassemble some protective cover components. This process is not only cumbersome, but also requires professional tools and certain operating skills, and it takes a long time. Utility Model Content

[0005] The purpose of this utility model is to provide a safety guard for chainsaws in order to solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety guard for a chainsaw, comprising: a chainsaw body, a support frame plate fixedly connected to one end of the upper part of the chainsaw body, a multi-level protective cover mechanism on the top of the support frame plate, a fixed spool at the front end of the multi-level protective cover mechanism, and a retractable mechanism at the other end of the upper part of the chainsaw body.

[0007] As a further embodiment of this utility model: a retractable folding sleeve is movably inserted into the front of the chainsaw body; a fixing block is fixedly connected to the upper tail end of the retractable folding sleeve; a connecting guide rod is fixedly connected to the middle of the front of the fixing block; a sliding block is fixedly connected to the upper head end of the retractable folding sleeve; a threaded rod is threadedly connected inside the connecting guide rod; a handle block is fixedly connected to one end of the threaded rod; and a threaded rod is fixedly connected to one end of the handle block.

[0008] As a further embodiment of this utility model: the multi-level protective cover mechanism includes an arc-shaped storage cover plate, a first-level return spring, a first-stage arc-shaped cover plate, and a second-level return spring. The arc-shaped storage cover plate is fixedly connected to the top of the support frame plate. The first-level return spring is fixedly connected inside the arc-shaped storage cover plate. The first-stage arc-shaped cover plate is slidably connected to the inner side of the arc-shaped storage cover plate. The second-level return spring is fixedly connected to the inner side of the first-stage arc-shaped cover plate. The mechanism also includes a second-stage arc-shaped cover plate, a third-stage return spring, a third-stage arc-shaped cover plate, a fourth-stage return spring, and a front-end arc-shaped cover plate. The second-stage arc-shaped cover plate is slidably connected to the inner side of the first-stage arc-shaped cover plate. The third-stage return spring is fixedly connected to the inner side of the second-stage arc-shaped cover plate. The fourth-stage return spring is fixedly connected to the inner side of the third-stage arc-shaped cover plate. The front-end arc-shaped cover plate is slidably connected to the inner side of the third-stage arc-shaped cover plate. The fixed spool is fixedly connected to the front-end arc-shaped cover plate.

[0009] As a further embodiment of this utility model: the take-up and take-down mechanism includes a baffle, a bracket, and a wire roller. The baffle is fixedly connected to the other end above the chainsaw body, the bracket is fixedly connected to the middle of the back of the baffle, and the wire roller is rotatably connected to one end of the bracket; a wire body and a motor. The wire body is fixedly connected to one end of a fixed wire shaft, and the motor is fixedly connected to one end above the bracket.

[0010] As a further embodiment of this utility model: the sliding block is slidably connected to the connecting guide rod, and the threaded rod is threadedly connected to the chainsaw body.

[0011] As a further embodiment of this utility model: the other end of the first reset spring is fixedly connected to the first-stage arc-shaped protective plate, the other end of the second reset spring is fixedly connected to the second-stage arc-shaped protective plate, the other end of the third reset spring is fixedly connected to the third-stage arc-shaped protective plate, and the other end of the fourth reset spring is fixedly connected to the front-end arc-shaped protective plate.

[0012] As a further embodiment of this utility model: the other end of the line body passes through the baffle and is fixedly connected to the line roller, and the output end of the motor is fixedly connected to the line roller.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, a reset spring automatically unfolds each level of the protective cover, forming a full-area protective barrier that effectively blocks splashes, prevents accidental contact, and improves operational safety. A motor-driven conveyor allows for flexible control of partial or complete retraction of the protective cover, quickly switching between protective states, saving adjustment time, and adapting to precision operations and multi-angle cutting. When idle, pushing the sliding block unfolds and retracts the folded protective cover, protecting the saw chain from accidental contact, dust, and rust, reducing collision and wear, and extending the saw chain's lifespan. Rotating the handle block simultaneously locks and installs the protective cover, making operation convenient. Reverse rotation retracts the cover for easy storage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the chainsaw body in this utility model;

[0017] Figure 3 This is a schematic diagram of the multi-level protective cover mechanism in this utility model;

[0018] Figure 4 This is a schematic diagram of the retracting mechanism in this utility model;

[0019] Figure 5 This is a schematic diagram of the retractable folding sheath in this utility model.

[0020] In the diagram: 1. Chainsaw body; 2. Support frame plate; 3. Multi-stage protective cover mechanism; 301. Arc-shaped storage cover plate; 302. Return spring one; 303. First-stage arc-shaped protective cover plate; 304. Return spring two; 305. Second-stage arc-shaped protective cover plate; 306. Return spring three; 307. Third-stage arc-shaped protective cover plate; 308. Return spring four; 309. Front arc-shaped protective cover plate; 4. Fixed spool; 5. Retracting mechanism; 501. Baffle; 502. Bracket; 503. Wire roller; 504. Wire body; 505. Motor; 6. Retractable folding sleeve; 7. Fixing block; 8. Connecting guide rod; 9. Sliding block; 10. Threaded rod one; 11. Handle block; 12. Threaded rod two. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0023] Reference Figures 1 to 5 In this embodiment of the utility model, a safety guard for a chainsaw includes: a chainsaw body 1, which serves as the core main body of the entire chainsaw, providing the installation foundation and power source for other components, and is a key execution component for the chainsaw to perform cutting operations; a support frame plate 2 is fixedly connected to one end of the upper part of the chainsaw body 1, and a multi-level protective cover mechanism 3 is provided on the top of the support frame plate 2, which supports and fixes the multi-level protective cover mechanism 3; a fixed spool 4 is provided at the front end of the multi-level protective cover mechanism 3; and a retractable mechanism 5 is provided at the other end of the upper part of the chainsaw body 1.

[0024] Reference Figure 1 and Figure 5 The chainsaw body 1 has a retractable folding sleeve 6 that is movably inserted into the front. A fixing block 7 is fixedly connected to the upper end of the retractable folding sleeve 6. A connecting guide rod 8 is fixedly connected to the middle of the front of the fixing block 7. A sliding block 9 is fixedly connected to the upper end of the retractable folding sleeve 6. When the chainsaw body 1 is not in use, the sliding block 9 is pushed to slide on the connecting guide rod 8, which causes the retractable folding sleeve 6 to unfold until the front end of the retractable folding sleeve 6 is inserted into the front of the chainsaw body 1. This completely covers the exposed saw chain, preventing people from accidentally touching the sharp saw teeth when the chain is not in use, reducing the risk of cuts. At the same time, it prevents dust, wood chips and other debris from adhering to the saw teeth, reducing the possibility of chain rusting and jamming.

[0025] The connecting guide rod 8 is internally threaded with a threaded rod 10. One end of the threaded rod 10 is fixedly connected to a handle block 11, and one end of the handle block 11 is fixedly connected to a threaded rod 2 12. The sliding block 9 is slidably connected to the connecting guide rod 8, and the threaded rod 2 12 is threadedly connected to the chainsaw body 1. By rotating the handle block 11, the threaded rod 10 is partially unscrewed from the connecting guide rod 8, and the threaded rod 2 12 rotates forward synchronously until it is partially connected to the chainsaw body 1. This allows for quick installation of the retractable folding sleeve 6, which is easy to operate. When disassembling, rotating the handle block 11 in the opposite direction causes the sliding block 9 to slide, causing the retractable folding sleeve 6 to retract for easy storage.

[0026] Reference Figure 1 and Figure 3 The multi-level protective cover mechanism 3 includes an arc-shaped storage cover plate 301, a first return spring 302, a first-level arc-shaped protective cover plate 303, and a second return spring 304. The arc-shaped storage cover plate 301 is fixedly connected to the top of the support frame plate 2. The first return spring 302 is fixedly connected to the inside of the arc-shaped storage cover plate 301. The first-level arc-shaped protective cover plate 303 is slidably connected to the inside of the arc-shaped storage cover plate 301. The second return spring 304 is fixedly connected to the inside of the first-level arc-shaped protective cover plate 303.

[0027] The system includes a secondary arc-shaped protective plate 305, a third return spring 306, a tertiary arc-shaped protective plate 307, a fourth return spring 308, and a front arc-shaped protective plate 309. The secondary arc-shaped protective plate 305 is slidably connected to the inner side of the primary arc-shaped protective plate 303. The third return spring 306 is fixedly connected to the inside of the secondary arc-shaped protective plate 305. The tertiary arc-shaped protective plate 307 is slidably connected to the inner side of the secondary arc-shaped protective plate 305. The fourth return spring 308 is fixedly connected to the inside of the tertiary arc-shaped protective plate 307. The front arc-shaped protective plate 309 is slidably connected to the inner side of the tertiary arc-shaped protective plate 307. The fixed spool 4 is fixedly connected to the front arc-shaped protective plate 309.

[0028] The other end of the return spring 302 is fixedly connected to the first-stage arc-shaped protective plate 303, the other end of the return spring 304 is fixedly connected to the second-stage arc-shaped protective plate 305, the other end of the return spring 306 is fixedly connected to the third-stage arc-shaped protective plate 307, and the other end of the return spring 308 is fixedly connected to the front arc-shaped protective plate 309. In use, the return springs 302, 304, 306, and 308 are in their normal state, pushing the corresponding first-stage arc-shaped protective plate 303, second-stage arc-shaped protective plate 305, third-stage arc-shaped protective plate 307, and front arc-shaped protective plate 309 outward to form the maximum protection range. The front arc-shaped protective plate 309 extends to the top of the saw chain front end, thus forming a protective barrier covering the entire working area of ​​the saw chain during use. This effectively blocks the risks of sawdust flying and accidental contact with the saw chain, significantly improving the safety of the operator.

[0029] Reference Figure 1 and Figure 4 The take-up and take-down mechanism 5 includes a baffle 501, a bracket 502 and a wire roller 503. The baffle 501 is fixedly connected to the other end of the top of the chainsaw body 1, the bracket 502 is fixedly connected to the middle of the back of the baffle 501, and the wire roller 503 is rotatably connected to one end of the bracket 502.

[0030] The line body 504 and the motor 505 are fixedly connected to one end of the fixed spool 4, and the motor 505 is fixedly connected to one end of the bracket 502.

[0031] The other end of the wire body 504 passes through the baffle 501 and is fixedly connected to the wire roller 503. The output end of the motor 505 is fixedly connected to the wire roller 503. When facing different cutting operation situations, to avoid the protective cover from affecting the cutting operation, there is no need to manually disassemble the protective cover. The wire roller 503 can be driven to rotate by starting the motor 505, so that the wire roller 503 winds the wire body 504, pulling the fixed wire shaft 4 towards the arc-shaped storage protective cover plate 301. The front arc-shaped protective cover plate 309 overcomes the thrust of the return spring 4 308 and retracts into the three-stage arc-shaped protective cover plate 307. The arc-shaped protective plate 307 overcomes the thrust of the return spring 306 and retracts into the secondary arc-shaped protective plate 305. This process continues until all protective plates retract into the arc-shaped storage protective plate 301. This allows for quick switching of states, saving adjustment time. It is especially suitable for precision operation scenarios that require frequent adjustment of cutting angles or observation of cuts. The motor 505 rotates in the reverse direction to release the line 504. Each set of springs pushes the protective plates at each level to automatically rebound and unfold. This hierarchical linkage and line transmission reduces mechanical complexity and improves the system's durability in harsh environments.

[0032] The working principle of this utility model is as follows:

[0033] Step 1: With return springs 302, 304, 306, and 4 in their normal positions, the corresponding primary arc-shaped protective plates 303, 305, 307, and front arc-shaped protective plate 309 are pushed outwards to form the maximum protection range. The front arc-shaped protective plate 309 extends above the front end of the saw chain, thus forming a protective barrier covering the entire working area of ​​the saw chain during use. This effectively blocks the risks of sawdust splashing and accidental contact with the saw chain, significantly improving operator safety. In different cutting situations, to avoid the protective plate affecting the cutting operation, there is no need to manually disassemble the protective plate. The motor 505 can be started to drive the wire roller 503 to rotate, causing the wire roller 503 to wind the wire body 504, pulling the fixed wire spool 4 towards the arc-shaped storage protective plate 301. The arc-shaped protective plate 309 overcomes the thrust of the return spring 308 and retracts into the third-level arc-shaped protective plate 307. The third-level arc-shaped protective plate 307 overcomes the thrust of the return spring 306 and retracts into the second-level arc-shaped protective plate 305, and so on, until all protective plates are retracted into the arc-shaped storage protective plate 301. This allows for quick switching of states, saving adjustment time. It is especially suitable for fine operation scenarios that require frequent adjustment of cutting angles or observation of cuts. The motor 505 rotates in the reverse direction to release the line 504. Each set of springs pushes the protective plates at each level to automatically rebound and unfold. This hierarchical linkage and line transmission reduces mechanical complexity and improves the durability of the system in harsh environments. Moreover, this method is not limited to full unfolding or full retraction. The length of the retraction of the line 504 can be controlled by the rotation of the motor 505 to achieve selective retraction of some levels, thereby achieving flexible adjustment.

[0034] Step two: When the chainsaw body 1 is not in use, push the sliding block 9 to slide it onto the connecting guide rod 8, causing the retractable folding sleeve 6 to unfold until the front end of the retractable folding sleeve 6 is inserted into the front of the chainsaw body 1. This completely covers the exposed saw chain, preventing personnel from accidentally touching the sharp teeth when not in use, reducing the risk of cuts. It also prevents dust, sawdust, and other debris from adhering to the saw teeth, reducing the possibility of chain rusting and jamming, and minimizing collisions between the saw chain and other objects during transportation or storage, protecting the sharpness of the saw teeth and extending the life of the saw chain. Then, turn the handle block 11 to rotate the threaded rod 10 out of the connecting guide rod 8. At the same time, the threaded rod 12 rotates forward until it is partially connected to the chainsaw body 1. This quickly completes the installation of the retractable folding sleeve 6, which is easy to operate. To disassemble, rotate the handle block 11 in the opposite direction, and slide the sliding block 9 to retract the retractable folding sleeve 6 for easy storage.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A safety guard for a chainsaw, characterized in that, include: A chainsaw body (1) is provided with a support frame plate (2) fixedly connected to one end of the upper part of the chainsaw body (1). The support frame plate (2) is provided with a multi-level protective cover mechanism (3) at the top. The multi-level protective cover mechanism (3) is provided with a fixed spool (4) at the front end. The chainsaw body (1) is provided with a retraction mechanism (5) at the other end of the upper part of the chainsaw body (1).

2. A safety guard for a chainsaw according to claim 1, characterized in that, The chainsaw body (1) has a retractable folding sleeve (6) that is movably inserted into the front. A fixing block (7) is fixedly connected to the upper tail end of the retractable folding sleeve (6). A connecting guide rod (8) is fixedly connected to the middle of the front of the fixing block (7). A sliding block (9) is fixedly connected to the upper head end of the retractable folding sleeve (6). A threaded rod (10) is threaded inside the connecting guide rod (8). A handle block (11) is fixedly connected to one end of the threaded rod (10). A threaded rod (12) is fixedly connected to one end of the handle block (11).

3. A safety guard for a chainsaw according to claim 1, characterized in that, The multi-level protective shield mechanism (3) includes: The components include an arc-shaped storage cover (301), a first-stage arc-shaped cover (303), and a second-stage return spring (304). The arc-shaped storage cover (301) is fixedly connected to the top of the support frame plate (2). The first-stage return spring (302) is fixedly connected to the inside of the arc-shaped storage cover (301). The first-stage arc-shaped cover (303) is slidably connected to the inside of the arc-shaped storage cover (301). The second-stage return spring (304) is fixedly connected to the inside of the first-stage arc-shaped cover (303). The system comprises a secondary arc-shaped protective cover (305), a third return spring (306), a third arc-shaped protective cover (307), a fourth return spring (308), and a front arc-shaped protective cover (309). The secondary arc-shaped protective cover (305) is slidably connected to the inner side of the first-level arc-shaped protective cover (303). The third return spring (306) is fixedly connected to the inside of the secondary arc-shaped protective cover (305). The third arc-shaped protective cover (307) is slidably connected to the inner side of the secondary arc-shaped protective cover (305). The fourth return spring (308) is fixedly connected to the inside of the third arc-shaped protective cover (307). The front arc-shaped protective cover (309) is slidably connected to the inner side of the third arc-shaped protective cover (307). The fixed spool (4) is fixedly connected to the front arc-shaped protective cover (309).

4. A safety guard for a chainsaw according to claim 1, characterized in that, The receiving and extending mechanism (5) includes: The components include a baffle (501), a bracket (502), and a wire roller (503). The baffle (501) is fixedly connected to the other end of the chainsaw body (1). The bracket (502) is fixedly connected to the middle of the back of the baffle (501). The wire roller (503) is rotatably connected to one end of the bracket (502). The cable (504) and motor (505) are fixedly connected to one end of the fixed spool (4) and the motor (505) is fixedly connected to one end of the bracket (502).

5. A safety guard for a chainsaw according to claim 2, characterized in that, The sliding block (9) is slidably connected to the connecting guide rod (8), and the threaded rod (12) is threadedly connected to the chainsaw body (1).

6. A safety guard for a chainsaw according to claim 3, characterized in that, The other end of the first reset spring (302) is fixedly connected to the first-level arc-shaped protective plate (303), the other end of the second reset spring (304) is fixedly connected to the second-level arc-shaped protective plate (305), the other end of the third reset spring (306) is fixedly connected to the third-level arc-shaped protective plate (307), and the other end of the fourth reset spring (308) is fixedly connected to the front arc-shaped protective plate (309).

7. A safety guard for a chainsaw according to claim 4, characterized in that, The other end of the line (504) passes through the baffle (501) and is fixedly connected to the line roller (503), and the output end of the motor (505) is fixedly connected to the line roller (503).

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