Brake device of gardening tool

Abstract

The invention provides a brake device of a gardening tool, belongs to the technical field of gardening tools, and mainly solves the problem of how to improve the use stability of the gardening tool. The brake device of the gardening tool comprises a shell, a safety lock plate and a trigger, and the safety lock plate and the trigger are located at the front end and the rear end of the shell; a motor and a brake connecting rod are arranged in the shell, the safety lock plate can drive the brake connecting rod to move front and back, the motor is located below the brake connecting rod and arranged in the length direction of the shell, a containing groove located between the motor and the shell is formed in one end of the brake connecting rod, and the trigger can swing in the containing groove in a reciprocating mode. When the safety lock plate drives the brake connecting rod to move forwards and presses the trigger, the trigger is connected with the bottom of the containing groove in a clamped mode and drives the brake connecting rod to press the starting switch. The accommodating groove of the brake connecting rod is arranged between the motor and the inner wall of the shell, so that interference with other parts due to an overlarge movement range is avoided.

Description

Technical Field

[0001] This invention belongs to the field of garden tool technology, and specifically relates to a braking device for garden tools. Background Technology

[0002] Chainsaws are commonly used cutting tools in landscaping operations, widely applied in tree pruning, logging, and landscaping renovation. They mainly consist of a power head and a saw chain. Pressing the trigger 4 on the power head causes the saw chain to rotate via the motor or engine, thus performing the cutting operation on the wood. The safety of operation and the reliability of the structure are directly related to the personal safety of the user and others. To avoid the operational risks caused by accidental activation, existing power heads are generally equipped with a safety locking mechanism, which is linked to an internal braking mechanism. In the event of an accident and locking, the braking mechanism will apply the brakes to ensure safe use.

[0003] In existing technologies, motors are often installed perpendicular to the housing. The motor's output shaft is inserted into the housing containing the brake components, and the saw chain is driven by the interaction of spur gears. While separating the motor and brake structure provides sufficient space for the brake and safety locking structures, it results in an excessively large lateral area of ​​the power head. The arrangement of the motor, brake structure, and trigger is not compact enough, and there is a large amount of room for movement. This makes the trigger and brake structures prone to failure due to problems during transportation or use. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a braking device for garden tools. The technical problem this invention aims to solve is: how to improve the stability of garden tools during use.

[0005] The objective of this invention can be achieved through the following technical solution: A braking device for garden tools, comprising a housing, a safety lock plate, and a trigger, wherein the safety lock plate and the trigger are located at the front and rear ends of the housing, and a motor and a brake linkage are provided inside the housing, wherein the safety lock plate can drive the brake linkage to move back and forth, characterized in that the motor is located below the brake linkage and is arranged along the length direction of the housing, one end of the brake linkage is provided with a receiving groove located between the motor and the housing, the trigger can reciprocate within the receiving groove, and a start switch for controlling the start of the motor is provided on one side of the brake linkage, wherein when the safety lock plate drives the brake linkage to move forward and presses the trigger, the trigger engages with the bottom of the receiving groove and drives the brake linkage to press the start switch.

[0006] This application simplifies the motor layout and reduces its size by placing the motor along the length of the housing between the safety lock plate and the trigger. It also uses a method where the brake linkage and one end of the trigger are engaged between the motor and the housing. Combined with the physical limiting effect of the brake linkage's receiving groove, the reciprocating swing of the trigger is strictly confined within the receiving groove, precisely controlling the trigger's range of motion and preventing overtravel due to excessive trigger swing. Furthermore, the interlocking mechanism between the trigger and the bottom of the receiving groove ensures that the travel of the brake linkage always remains within a preset threshold, preventing interference between the brake linkage and the motor / housing due to overtravel, or damage caused by incomplete or excessive pressing of the start switch. This structurally eliminates device failure caused by overtravel, significantly improving the operational stability of the braking device and the entire garden tool.

[0007] In the braking device of the aforementioned garden tool, the trigger and brake linkage are connected by a lever, which is located between the motor and the housing. The trigger drives the brake linkage to reciprocate through the lever. By placing the motor within the housing between the trigger and the brake linkage, the direct linkage between the trigger and the brake linkage is replaced, shortening the trigger's swing amplitude, avoiding interference with the housing due to a large trigger swing amplitude, and further reducing the probability of overtravel.

[0008] In the braking device of the aforementioned garden tool, the brake linkage, lever, and trigger are arranged sequentially along the length of the housing. By hingedly connecting the three components, the problems of motion stagnation and stroke blockage caused by rigid connections are avoided, ensuring that the movement stroke of each component is always within a controllable range, preventing overtravel due to motion stagnation, and improving the stability of use.

[0009] In the braking device of the above-mentioned garden tool, the middle part of the lever is hinged to the housing, and the front and rear ends of the lever can be hinged to the trigger and the brake lever, respectively.

[0010] In the braking device of the above-mentioned garden tool, the lever is provided with a pin that cooperates with the receiving groove. The receiving groove is L-shaped. When the safety lock plate drives the brake linkage to move backward, the pin can reciprocate within the vertical groove on the side of the receiving groove.

[0011] In the braking device of the above-mentioned garden tool, a pressing plate is provided at the bottom of the brake linkage, the pressing plate protrudes in the direction of the start switch, and a guide slope is provided at the front end of the pressing plate.

[0012] In the braking device of the above-mentioned garden tool, a drive wheel is also provided inside the housing, the brake linkage is connected to the drive wheel through a locking mechanism, and the motor is connected to the drive wheel through a bevel gear.

[0013] In the braking device of the above-mentioned garden tool, the rear end of the housing is provided with a baffle that can move back and forth, and the baffle can abut against the trigger.

[0014] Compared with the prior art, the present invention has the following advantages: 1. This application limits the trigger swing range by placing the motor below the brake linkage along the length of the housing. By cooperating with the L-shaped receiving groove on the brake linkage and the secondary limiting of the trigger by the rear end baffle of the housing, it achieves precise control of the stroke of each moving part, eliminating problems such as component misalignment and jamming and damage to the start switch caused by overtravel. At the same time, the longitudinal layout of the motor and the linear arrangement of the core components along the length of the housing effectively avoid motion interference between components. Attached Figure Description

[0015] Figure 1 This is a 3D schematic diagram of the power head; Figure 2 This is a schematic diagram of the explosion of the power head; Figure 3 This is a cross-sectional view showing the usage state; Figure 4 This is a cross-sectional view of the braking state; In the diagram, 1. Housing; 1a. Start switch; 1b. Drive wheel; 1c. Baffle; 2. Motor; 2a. Output shaft; 2b. Bevel gear; 3. Safety lock plate; 4. Trigger; 5. Brake linkage; 5a. Receiving groove; 5a1. Snap-fit ​​part; 5a2. Moving part; 5b. Press plate; 6. Lever; 6a. Pin; 7. Locking mechanism; 7a. Locking plate; 7a1. Strip hole; 7a2. Locking part; 7b. Brake spring; Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figure 1 and Figure 2 As shown, a braking device for a garden tool includes a housing 1 and a motor 2 located inside the housing 1. A trigger 4 and a safety lock plate 3 are respectively provided at the front and rear ends of the housing 1. The motor 2 is located between the trigger 4 and the safety lock plate 3 and is arranged along the length of the housing 1. A brake linkage 5 and a lever 6 are provided between the inner side wall of the housing 1 and the motor 2. The front end of the trigger 4 extends a certain distance into the motor 2 and the housing 1. The front end of the brake linkage 5 is hinged to the safety lock plate 3, and the rear end is provided with a receiving groove 5a. The brake linkage 5 is connected to the output shaft 2a through a locking mechanism 7. The locking mechanism 7 includes a locking plate 7a and a brake spring 7b.

[0018] It is worth mentioning that, such as Figure 2As shown, the brake linkage 5, lever 6 and trigger 4 are connected and arranged sequentially from front to back along the length of the housing 1. The housing 1 is fixed with a start switch 1a, which is located on the side of the brake linkage 5. The motor 2 is connected to the output shaft 2a through a bevel gear 2b.

[0019] like Figure 3 As shown, the safety lock plate 3 is hinged to the front end of the housing 1, and one end extends into the housing 1 and is connected to the end of the hinge shaft brake linkage 5. The middle part of the brake linkage 5 is movably connected to the reciprocating locking plate 7a. The other end of the brake linkage 5 is provided with an L-shaped receiving groove 5a, which includes a movable part 5a2 and a locking part 5a1. The movable part 5a2 is vertically arranged relative to the locking part 5a1. The pin 6a at the front end of the lever 6 is inserted into the receiving groove 5a. The rear end of the lever 6 is movably connected to the trigger 4. The middle part of the brake linkage 5 is provided with a pressing plate 5b that can press the switch. The housing 1 is provided with a pressing plate 5b located at the end that can press the switch. A reciprocating baffle 1c is located above the trigger 4 and works in conjunction with it. A locking plate 7a is hinged to the housing 1 and has a slotted hole 7a1. A shaft on the brake linkage 5 passes through and is movably connected to the locking plate 7a. The locking plate 7a also has a locking part 7a2, which is at a certain angle to the slotted hole 7a1. When the safety lock plate 3 is rotated to the unlocked state, the brake linkage 5 moves forward, and the pin 6a on the lever 6 is engaged in the locking part 5a1. After the trigger 4 is pressed, the lever 6, which is hinged to the housing 1, rotates, driving the brake linkage 5 and pressing the start switch 1a.

[0020] like Figure 4 As shown, when the safety lock plate 3 rotates forward, the brake linkage 5 moves forward, causing the pin 6a on the lever 6 to separate from the locking part 5a1 of the receiving groove 5a and enter the movable part 5a2, so that the trigger 4 and the lever 6 can swing back and forth between the motor 2 and the inner wall of the housing 1.

[0021] In summary, this application, as a braking device for a garden tool, mainly uses a motor 2 inside the housing 1 to drive the bevel gear 2b to rotate, thereby driving the saw chain to rotate for cutting. A locking mechanism 7 inside the housing 1 locks the output shaft 2a in case of a saw chain malfunction, preventing the output shaft 2a from continuing to rotate and causing a safety accident. Specifically, this application positions the motor 2 along the length of the housing 1 between the trigger 4 and the safety lock plate 3. By vertically centering the motor 2, the overall power head area is shortened, and the center of gravity is moved rearward, improving stability during use. Furthermore, by placing the receiving grooves 5a on the front trigger 4, lever 6, and brake linkage 5 between the inner wall of the housing 1 and the motor 2, the range of motion of the lever 6, trigger 4, and brake linkage 5 is limited, preventing problems such as jamming or failure due to excessive range of motion.

[0022] Based on this, the safety lock plate 3 of this application is connected to the locking mechanism 7 via a brake lock rod. When the saw chain malfunctions and locking is achieved, the locking part 7a2 rotates under the action of the locking spring, thereby driving the shaft of the brake linkage 5 to move from the front end of the slot 7a1 to the rear end, thereby driving the brake linkage 5 to move backward and causing the safety lock plate 3 to rotate forward to the locked state. At the same time, after the brake linkage 5 is displaced, the pin 6a separates from the engaging part 5a1 of the receiving groove 5a and enters the movable part 5a2, thereby providing sufficient movement space for the pin 6a, so that when When the lever rotates upward due to the trigger, the pin cannot directly drive the brake linkage to swing back and forth. This prevents the trigger 4 from driving the press plate 5b to press the start switch 1a in the locked state. By using the safety lock plate 3 to drive the brake linkage 5 to move back and forth, the linkage is coupled and decoupled between the trigger 4 and the brake linkage 5 in different states of the safety lock plate 3, thus preventing the chainsaw from starting in the locked state. This also reduces the range of motion of the trigger 4 and the brake linkage 5, preventing interference with other parts inside the housing 1 and the motor 2 during locking and unlocking, thereby improving the reliability of use.

[0023] It is worth mentioning that by setting the start switch 1a inside the housing 1 on the side of the brake linkage 5, and by driving the brake linkage 5 to move upward, the pressing plate 5b presses the start switch 1a on the side. This not only improves the integration between the components inside the housing 1, but also shortens the swing amplitude required for the brake linkage 5 to press the start switch 1a by placing the start switch 1a on the side and pressing the start switch 1a by the pressing plate 5b protruding to one side. This further avoids interference between the brake linkage 5 and the motor 2 during use, ensuring that it can be used normally.

[0024] The housing 1 is also equipped with a baffle 1c that can move back and forth. The bottom surface of the baffle 1c abuts against the trigger 4 to prevent the trigger 4 from rotating and causing the brake linkage 5 to press the start switch 1a when not in use.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0026] Although this document frequently uses terms such as 1. housing; 1a. start switch; 1b. drive wheel; 1c. baffle; 2. motor; 2a. output shaft; 2b. bevel gear; 3. safety lock plate; 4. trigger; 5. brake linkage; 5a. receiving groove; 5a1. snap-fit ​​part; 5a2. moving part; 5b. pressing plate; 6. lever; 6a. pin; 7. locking mechanism; 7a. locking plate; 7a1. slotted hole; 7a2. locking part; 7b. brake spring, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A braking device for a garden tool, comprising a housing (1), a safety lock plate (3), and a trigger (4), wherein the safety lock plate (3) and the trigger (4) are located at the front and rear ends of the housing (1), and a motor (2) and a brake linkage (5) are provided inside the housing (1), wherein the safety lock plate (3) is capable of driving the brake linkage (5) to move back and forth, characterized in that, The motor (2) is located below the brake linkage (5) and is arranged along the length of the housing (1). One end of the brake linkage (5) is provided with a receiving groove (5a) between the motor (2) and the housing (1). The trigger (4) can swing back and forth in the receiving groove (5a). A start switch (1a) for controlling the start of the motor (2) is provided on one side of the brake linkage (5). When the safety lock plate (3) drives the brake linkage (5) to move forward and presses the trigger (4), the trigger (4) engages with the bottom of the receiving groove (5a) and drives the brake linkage (5) to press the start switch (1a).

2. The braking device for garden tools according to claim 1, characterized in that, The trigger (4) is connected to the brake linkage (5) via a lever (6). The lever (6) is located between the motor (2) and the housing (1). The trigger (4) drives the brake linkage (5) to swing back and forth via the lever (6).

3. The braking device for garden tools according to claim 2, characterized in that, The brake linkage (5), lever (6), and trigger (4) are arranged sequentially along the length of the housing (1).

4. The braking device for garden tools according to claim 3, characterized in that, The middle part of the lever (6) is hinged to the housing (1), and the front and rear ends of the lever (6) can be hinged to the trigger (4) and the brake lever (6) respectively.

5. The braking device for garden tools according to claim 4, characterized in that, The lever (6) is provided with a pin (6a) that cooperates with the receiving groove (5a). The receiving groove (5a) is L-shaped. When the safety lock plate (3) drives the brake linkage (5) to move backward, the pin (6a) can reciprocate within the vertical groove on the side of the receiving groove (5a).

6. The braking device for garden tools according to any one of claims 1 to 5, characterized in that, The bottom of the brake linkage (5) is provided with a pressing plate (5b), which protrudes toward the start switch (1a), and the front end of the pressing plate (5b) is provided with a guide slope.

7. The braking device for garden tools according to claim 1, characterized in that, The housing (1) is also provided with a drive wheel (1b), the brake linkage (5) is connected to the drive wheel (1b) through a locking mechanism (7), and the motor (2) is connected to the drive wheel (1b) through a bevel gear (2b).

8. The braking device for garden tools according to claim 1, characterized in that, The rear end of the housing (1) is provided with a baffle (1c) that can reciprocate, and the baffle (1c) can abut against the trigger (4).

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