CN219053111U

CN219053111U - Alternating current chain saw

Info

Publication number: CN219053111U
Application number: CN202223605835.9U
Authority: CN
Inventors: 赵伟忠; 徐建锋; 李�杰; 朱连兵
Original assignee: ZHEJIANG ZHONGLI TOOLS MANUFACTURE CO Ltd
Current assignee: ZHEJIANG ZHONGLI TOOLS MANUFACTURE CO Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-23
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses an alternating-current chain saw which comprises a shell and a motor, wherein a rotating shaft driven by the motor is arranged in the shell, a chain wheel is arranged on the rotating shaft, a chain is arranged on the chain wheel, a handle end is arranged on the shell, a switch trigger for controlling the motor to be opened and closed is arranged at the handle end, a brake rod which is linked with the switch trigger is arranged in the shell, and the switch trigger drives the brake rod to brake the rotating shaft when the alternating-current motor is closed. The utility model aims to brake when the power is cut off, realize quick stop and improve the use safety.

Description

Alternating current chain saw

Technical Field

The utility model belongs to the field of cutting tools, and particularly relates to an alternating-current chain saw.

Background

A chain saw is a tool for cutting by high-speed rotation of a chain with a blade, and generally uses an engine or a motor as a driving source, and the chain has inertia in a high-speed driving state together with a transmission system, and is not rapidly stopped even if power is cut off, and when an unexpected situation occurs, the chain saw may be damaged by an operator due to runaway.

Disclosure of Invention

The utility model provides an alternating-current chain saw, which is used for braking when power is cut off, so that quick stop is realized, and the use safety is improved.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an alternating current chain saw, includes casing and motor, be equipped with in the casing by motor drive's pivot, be equipped with the sprocket in the pivot, be equipped with the chain on the sprocket, the casing is equipped with the handle end, the handle end is equipped with the switch trigger of control motor switching, be equipped with in the casing with the brake lever of switch trigger linkage, the switch trigger drives when making alternating current motor close the brake lever brakes the pivot. When the switch trigger is switched on and the motor is started, the motor power drives the chain to drive through the rotating shaft, when the switch trigger is released, the motor is powered off, and meanwhile, the rotating shaft is braked through the brake rod, so that the chain saw is stopped rapidly.

Preferably, a push rod is arranged in the shell, the switch trigger is rotationally connected to the inner side of the handle end, the switch trigger drives the push rod to move towards the direction of the brake rod when being pressed to rotate, a connecting rod is fixed on the brake rod, the push rod drives the connecting rod to move away from the direction of the rotating shaft when moving towards the direction of the brake rod, a brake spring is arranged in the shell, and the brake spring acts on the connecting rod to move towards the direction close to the rotating shaft. The push rod is matched with the connecting rod to enable the switch trigger and the brake rod to form linkage, when the switch trigger starts the motor to operate, the connecting rod compresses the brake spring, and when the switch trigger is released, the brake spring rebounds to drive the connecting rod to move towards the rotating shaft, so that the brake rod performs braking operation, and automatic stop is realized after power failure.

Preferably, one end of the push rod, which is close to the connecting rod, is provided with a guide inclined plane, and the connecting rod is provided with a guide end which is in sliding fit with the guide inclined plane. Through the cooperation of direction inclined plane and leading end, realize that the push rod drives the connecting rod and keeps away from the pivot and release braking state, the operation process is comparatively simple swift.

Preferably, the push rod is provided with a limit groove at one side of the guide inclined plane far away from the connecting rod, and the guide end moves towards the push rod along the guide inclined plane and then enters the limit groove. Therefore, after the push rod drives the connecting rod to move by pressing the switch trigger, the guide end can temporarily limit the connecting rod when entering the limit groove, the acting force required by pressing the switch trigger is reduced, the hand fatigue of a user is reduced, and the use comfort is improved.

Preferably, a torsion spring is arranged on the rotating shaft, and the brake lever acts on the torsion spring to brake when the brake lever moves towards the rotating shaft. When the brake lever falls down, the brake lever acts on the torsion spring, which is beneficial to improving the braking efficiency.

Preferably, a guide block is arranged above the rotating shaft of the shell, and the brake rod is in sliding fit with the guide block. The guide block can guide the displacement direction of the brake rod, so that the braking stability of the brake rod is improved.

The beneficial effects of the utility model are as follows: (1) The rotating shaft is braked after the motor is powered off to realize shutdown, so that the use safety is improved; (2) The braking process is automatically realized, higher braking efficiency and stability are provided, and the protection for operators is improved.

Drawings

FIG. 1 is a structural illustration of the present utility model;

FIG. 2 is a perspective view of the present utility model;

fig. 3 is an internal structural view of the present utility model.

In the figure: chain 1, baffle 2, guide block 3, brake lever 4, brake spring 5, connecting rod 6, guide end 6a, push rod 7, spacing groove 7a, guide inclined plane 7b, switch trigger 8, casing 9, handle end 9a, pivot 10, sprocket 10a, pinion 11, motor 12, gear wheel 13, torsional spring 14.

Detailed Description

The utility model is further described below with reference to the drawings and detailed description.

In the embodiment shown in fig. 1 and 2, an alternating current chain saw comprises a shell 9 and a motor 12, wherein the motor 12 is arranged on one side of the shell 9, a rotating shaft 10 driven by the motor 12 is arranged in the shell 9, a pinion 11 is arranged at the output end of the motor 12, a large gear 13 meshed with the pinion 11 is arranged on the rotating shaft 10, a chain wheel 10a is arranged on the rotating shaft 10, a chain 1 is arranged on the chain wheel 10a, a guide plate 2 extending forwards is arranged on the shell 9, and the motor 12 is in variable speed transmission through the pinion 11 and the large gear 13 and drives the chain 1 to run along the guide plate 2 through the chain wheel 10 a.

As shown in fig. 3, the housing 9 is provided with a handle end 9a, the handle end 9a is provided with a switch trigger 8 for controlling the motor 12 to be turned on and off, the switch trigger 8 is rotatably connected and arranged on the inner side of the handle end 9a, when the switch trigger 8 is pressed inwards, the motor 12 is turned on and started, and when the switch trigger 8 is released, the motor 12 is turned off and turned off. The switch trigger 8 has a certain elastic force and can automatically rotate and reset after being loosened. The casing 9 is internally provided with a push rod 7 and a brake rod 4, wherein the push rod 7 can slide in a translation way, the brake rod 4 can slide in a translation way towards the rotating shaft 10, the brake rod 4 is fixedly provided with a connecting rod 6, the casing 9 is internally provided with a brake spring 5, and the brake spring 5 acts on the connecting rod 6 to move towards the direction close to the rotating shaft 10.

One end of the push rod 7, which is close to the connecting rod 6, is provided with a guide inclined surface 7b, the connecting rod 6 is provided with a guide end 6a which is in sliding fit with the guide inclined surface 7b, the push rod 7 is driven to move towards the brake rod 4 when the switch trigger 8 is pressed to rotate, the guide end 6a is matched with the guide inclined surface 7b, the connecting rod 6 is driven to move away from the rotating shaft 10 when the push rod 7 moves towards the brake rod 4, and the brake rod 4 is driven to move away from the rotating shaft 10 to release the brake. In this way, the brake lever 4 is kept in linkage with the switch trigger 8, and the switch trigger 8 drives the brake lever 4 to brake the rotating shaft 10 when the ac motor 12 is turned off, and releases the brake state for the rotating shaft 10 when the switch trigger 8 is released. The casing 9 is equipped with the guide block 3 in the top of pivot 10, and brake lever 4 and guide block 3 sliding fit, and brake lever 4 slides relative guide block 3, and guide block 3 makes brake lever 4 remain stable when brake lever 4 brakes to make brake lever 4 provide stable braking effect.

In addition, the push rod 7 is provided with a limit groove 7a at one side of the guide inclined surface 7b far away from the connecting rod 6, the guide end 6a moves towards the push rod 7 along the guide inclined surface 7b and then enters the limit groove 7a, and the guide end 6a is provided with an arc surface matched with the limit groove 7a, so that the relative state between the connecting rod 6 and the push rod 7 is maintained, the acting force required by pressing is reduced, and the hand fatigue of an operator is relieved. When the switch trigger 8 releases the rotary reset, the push rod 7 synchronously resets along with the switch trigger 8, so that the limit groove 7a and the guide end 6a are released from limit, and the brake rod 4 is conveniently reset under the action of the brake spring 5. The torsion spring 14 is arranged on the rotating shaft 10, the brake lever 4 acts on the torsion spring 14 to brake when the brake lever 4 moves towards the rotating shaft 10, and the lower end of the brake lever 4 acts on the protruding part of the last circle of the torsion spring 14, so that the quick stopping operation is ensured, and the time required for stopping is shortened.

Claims

1. The utility model provides an alternating current chain saw, includes casing (9) and motor (12), characterized by, be equipped with in casing (9) by motor (12) driven pivot (10), be equipped with sprocket (10 a) on pivot (10), be equipped with chain (1) on sprocket (10 a), casing (9) are equipped with handle end (9 a), handle end (9 a) are equipped with switch trigger (8) of control motor (12) switching, be equipped with in casing (9) with brake lever (4) of switch trigger (8) linkage, switch trigger (8) drive when making alternating current motor (12) close brake lever (4) brake pivot (10).

2. The alternating current chain saw according to claim 1, wherein a push rod (7) is arranged in the shell (9), the switch trigger (8) is rotationally connected to the inner side of the handle end (9 a), the push rod (7) is driven to move towards the brake rod (4) when the switch trigger (8) is pressed and rotated, the connecting rod (6) is fixed on the brake rod (4), the push rod (7) is driven to move away from the rotating shaft (10) when moving towards the brake rod (4), a brake spring (5) is arranged in the shell (9), and the brake spring (5) acts on the connecting rod (6) to move towards the direction close to the rotating shaft (10).

3. The alternating current chain saw according to claim 2, wherein one end of the push rod (7) close to the connecting rod (6) is provided with a guiding inclined surface (7 b), and the connecting rod (6) is provided with a guiding end (6 a) in sliding fit with the guiding inclined surface (7 b).

4. An alternating current chain saw according to claim 3, wherein the push rod (7) is provided with a limit groove (7 a) at one side of the guide inclined surface (7 b) far away from the connecting rod (6), and the guide end (6 a) moves towards the push rod (7) along the guide inclined surface (7 b) and then enters into the limit groove (7 a).

5. An alternating current chain saw according to claim 1 or 2 or 3 or 4, characterized in that the rotary shaft (10) is provided with a torsion spring (14), and the brake lever (4) acts on the torsion spring (14) for braking when the brake lever (4) moves towards the rotary shaft (10).

6. An alternating current chain saw according to claim 1 or 2 or 3 or 4, characterized in that the housing (9) is provided with a guide block (3) above the rotation shaft (10), the brake lever (4) being in sliding engagement with the guide block (3).