CN219153170U - Safety protection structure of chain saw - Google Patents

Abstract

The utility model discloses a safety protection structure of a chain saw, which comprises a shell, a switch trigger, a main switch and a reverse self-locking button, wherein the front end of the switch trigger is matched with the main switch, the switch trigger is matched with the reverse self-locking button for use, a first reset spring is arranged at the reverse self-locking button, the safety protection structure further comprises a push rod, a multi-link assembly, a protection plate, a push block, a micro switch and a brake assembly, the multi-link assembly comprises a first link and a second link, the front end of the push rod is matched with the rear end of the switch trigger, the rear end of the push rod is matched with the front end of the second link, the front end of the first link is matched with the upper side of the rear end of the push rod, the middle part of the first link is connected with the shell, and the brake assembly is arranged on the upper side of the first link and fixedly connected with the shell. Through the arrangement, the chain saw can BE started by opening the protection plate firstly and pressing the switch trigger, is safer when in use compared with a single starting mode, and can meet the requirement standard of EK9-BE-97 (v 2).

Description

Safety protection structure of chain saw

Technical Field

The utility model relates to an electric tool, in particular to a safety protection structure of a chain saw.

Background

A chain saw is a gardening tool for cutting wood or tree branches by driving a chain with a blade to rotate at a high speed by power.

There are generally two ways to control the start of a chain saw, the first is to control the start and stop of the chain saw directly by a power switch. The second type is to add a chain brake lever, and the working state of the chain brake is identified through position or other modes under the condition that a power switch is not loosened. This single start-up mode is extremely safe to use and is not allowed in the latest standards required by chain saw EK9-BE-97 (v 2), and therefore improvements are needed.

Disclosure of Invention

Aiming at the defects that a single starting mode in the prior art is not safe enough and the requirement standard of a chain saw (EK 9-BE-97 (v 2)) is not met, the utility model provides a novel safety protection structure of the chain saw.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides a safety protection structure of chain saw, includes casing, switch trigger, main switch and anti-auto-lock button, the switch trigger with the casing rotates to be connected, the front end of switch trigger with the main switch cooperation, just the switch trigger with anti-auto-lock button adaptation is used, anti-auto-lock button department is equipped with first reset spring, still includes push rod, many link assemblies, guard plate, ejector pad, micro-gap switch and brake subassembly, the guard plate with the casing is connected, the ejector pad with the guard plate is connected, many link assemblies include first connecting rod and second connecting rod, the front end of push rod with the rear end adaptation of switch trigger uses, the rear end of second connecting rod also with the guard plate is connected, the front end of first connecting rod with the rear end upside adaptation of push rod uses, the rear end of first connecting rod with still be equipped with first contact surface and second contact surface on the guard plate respectively, the ejector pad with the first connecting rod middle part with the casing is connected with the micro-gap switch sets up and uses the side of the brake subassembly.

The shell provides a bearing platform for parts such as a switch trigger, a main switch, a protection plate, a micro switch, a brake assembly and the like, and related parts can be protected. When the chain saw is used, the protection plate needs to BE driven by the protection plate to start the micro switch, the switch trigger can BE pressed to control the main switch to start, the brake assembly can control the stop of the chain saw, the protection plate needs to BE opened firstly through the arrangement, the switch trigger can BE pressed to start the chain saw, and the chain saw is safer when in use compared with a single starting mode and can meet the requirement standard of EK9-BE-97 (v 2).

Preferably, the safety protection structure of a chain saw further comprises a fixing rod and a push rod spring, wherein the push rod is further provided with a sliding groove, the fixing rod is arranged in the sliding groove, one end of the push rod spring is connected with the fixing rod, and the other end of the push rod spring is connected with the push rod.

The sliding groove is used for enabling the push rod to slide back and forth, and the push rod spring can reset the push rod.

Preferably, in the safety protection structure of a chain saw, a second return spring is further disposed at a connection position between the first connecting rod and the housing.

The second return spring is used for resetting the first connecting rod.

Preferably, the above-mentioned safety protection structure of chain saw, the brake subassembly includes brake lever, push plate, first fixed plate and second fixed plate, push plate and first fixed plate set up the upper end of brake lever, the push plate with the upside adaptation of push rod rear end is used, the lower extreme of brake lever with the second fixed plate is connected.

The second fixing plate is used for installing a brake lever, and the brake lever can stop driving the chain saw, so that the chain saw can be stopped from being used.

Preferably, in the safety protection structure of a chain saw, the brake assembly further includes a brake spring, and the brake spring is disposed between the first fixing plate and the pushing plate.

When the chain saw stops being used, the brake spring can reset the pushing plate.

Preferably, the safety protection structure of a chain saw further comprises a driving assembly, wherein the driving assembly comprises a driving shaft and a large gear, and the large gear is arranged on the driving shaft.

The drive assembly is used to start the chainsaw when the chainsaw is in need of use.

Preferably, in the safety protection structure of a chain saw, a torsion spring is arranged on the driving shaft, and the lower end of the brake lever is adapted to the torsion spring.

The torsion spring cooperates with the brake lever to slow down the rotation of the drive assembly and thereby stop the movement of the chain saw.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic diagram of an internal perspective structure of the present utility model;

FIG. 3 is a schematic diagram showing an internal three-dimensional structure of the present utility model;

FIG. 4 is a schematic view of the switch trigger of the present utility model after being depressed;

FIG. 5 is a schematic view of the structure of the protection plate of the present utility model after being pressed down;

fig. 6 is a schematic view of the structure of the switch trigger and the guard plate of the present utility model after being simultaneously pressed.

Detailed Description

The utility model is described in further detail below in connection with figures 1-6 and the detailed description, which are not intended to limit the utility model:

example 1

As shown in fig. 1-6, a safety protection structure of a chain saw comprises a shell 1, a switch trigger 2, a main switch 3 and an anti-self-locking button 4, wherein the switch trigger 2 is rotationally connected with the shell 1, the front end of the switch trigger 2 is matched with the main switch 3, the switch trigger 2 is matched with the anti-self-locking button 4, a first reset spring 5 is arranged at the anti-self-locking button 4, the safety protection structure further comprises a push rod 6, a multi-connecting rod assembly 7, a protection plate 8, a push block 9, a micro switch 10 and a brake assembly 11, the protection plate 8 is connected with the shell 1, the push block 9 is connected with the protection plate 8, the multi-connecting rod assembly 7 comprises a first connecting rod 71 and a second connecting rod 72, the front end of the push rod 6 is matched with the rear end of the switch trigger 2, the rear end of the push rod 6 is matched with the front end of the second connecting rod 72, the rear end of the second connecting rod 72 is also connected with the protection plate 8, the front end of the first connecting rod 71 is matched with the rear end of the first connecting rod 6, the rear end of the push rod 8 is connected with the first connecting rod 71 is provided with the first connecting rod 11, the first connecting rod 71 is connected with the first connecting rod 11 and the middle part 1 is further contacted with the first connecting rod 11, and the middle part is provided with the first connecting rod 71 and is contacted with the middle part 1.

Preferably, the device further comprises a fixed rod 12 and a push rod spring 13, wherein a sliding groove 61 is further formed in the push rod 6, the fixed rod 12 is arranged in the sliding groove 61, one end of the push rod spring 13 is connected with the fixed rod 12, and the other end of the push rod spring 13 is connected with the push rod 6.

Preferably, a second return spring 14 is further provided at the connection between the first link 71 and the housing 1.

Preferably, the brake assembly 11 includes a brake lever 111, a push plate 112, a first fixing plate 113 and a second fixing plate 114, the push plate 112 and the first fixing plate 113 are disposed at an upper end of the brake lever 111, the push plate 112 is adapted to an upper side surface of a rear end of the push rod 6, and a lower end of the brake lever 111 is connected to the second fixing plate 114.

Preferably, the brake assembly 11 further includes a brake spring 115, and the brake spring 115 is disposed between the first fixing plate 113 and the push plate 112.

Preferably, the device further comprises a driving assembly 15, wherein the driving assembly 15 comprises a driving shaft 151 and a large gear 152, and the large gear 152 is arranged on the driving shaft 151.

Preferably, a torsion spring 16 is disposed on the driving shaft 151, and the lower end of the brake lever 111 is adapted to the torsion spring 16.

Further, when the chain saw needs to be used, the protection plate 8 is pushed forward firstly, the protection plate 8 can drive the push block 9 to contact the micro switch 10 to enable the chain saw to be in a semi-electrified state, meanwhile, the second connecting rod 72 connected with the protection plate 8 can synchronously move forward, then the anti-self-locking button 4 is pressed to enable the switch trigger 2 to eliminate limit, then the switch trigger 2 is pressed to enable the switch trigger 2 to drive the push rod 6 to move backwards, meanwhile, the push rod 6 drives the first connecting rod 71 to enable the brake rod 111 to withdraw from a brake function, and the switch trigger 2 contacts the main switch 3 to enable the chain saw to be in a full-electrified state, so that the chain saw can normally run.

When the chain saw is stopped, the brake lever 111 can stop the torsion spring 16 under the action of the brake spring 115 only by loosening the switch trigger 2 or the protection plate 8, so that the driving shaft 151 stops outputting, and the chain saw can stop.

When the switch trigger 2 is opened firstly, the push rod 6 moves backwards, the first connecting rod 71 is pushed to move synchronously, at the moment, the first contact surface 711 of the first connecting rod 71 can BE mutually abutted against the second contact surface 81 of the protection plate 8, the second connecting rod 72 cannot drive the brake rod 111 to exit the braking function, the protection plate 8 is in an unable pushing state, so that the machine cannot BE started, the protection plate 8 is opened firstly when the chain saw is used, the switch trigger 2 can BE pressed to start the chain saw, and the chain saw is safer when being used relative to a single starting mode, and the requirement standard of EK9-BE-97 (v 2) can BE met.

In summary, the foregoing description is only of the preferred embodiments of the present utility model, and all equivalent changes and modifications that come within the scope of the present utility model are desired to be covered thereby.

Claims (7)

1. The utility model provides a safety protection structure of chain saw, includes casing (1), switch trigger (2), main switch (3) and anti-auto-lock button (4), switch trigger (2) with casing (1) rotate and are connected, the front end of switch trigger (2) with main switch (3) cooperation, just switch trigger (2) with anti-auto-lock button (4) adaptation is used, anti-auto-lock button (4) department is equipped with first reset spring (5), its characterized in that: still include push rod (6), many link assembly (7), guard plate (8), ejector pad (9), micro-gap switch (10) and brake subassembly (11), guard plate (8) with casing (1) are connected, ejector pad (9) with guard plate (8) are connected, many link assembly (7) include first connecting rod (71) and second connecting rod (72), the front end of push rod (6) with the rear end adaptation of switch trigger (2) uses, the rear end of push rod (6) with the front end adaptation of second connecting rod (72) uses, the rear end of second connecting rod (72) also with guard plate (8) are connected, the front end of first connecting rod (71) with the rear end upside adaptation of push rod (6) uses, the rear end of first connecting rod (71) with still be equipped with first contact surface (711) and second contact surface (81) on guard plate (8) respectively, the middle part (71) with casing (1) with the front end adaptation of second connecting rod (72) uses, the rear end of second connecting rod (72) also with casing (8) is connected.

2. The safety shield structure of a chain saw as set forth in claim 1, wherein: still include dead lever (12) and push rod spring (13), sliding groove (61) have still been seted up on push rod (6), dead lever (12) set up in sliding groove (61), the one end of push rod spring (13) with dead lever (12) are connected, the other end of push rod spring (13) is connected with push rod (6).

3. The safety shield structure of a chain saw as set forth in claim 1, wherein: the connecting part of the first connecting rod (71) and the shell (1) is also provided with a second reset spring (14).

4. The safety shield structure of a chain saw as set forth in claim 1, wherein: the brake assembly (11) comprises a brake rod (111), a pushing plate (112), a first fixing plate (113) and a second fixing plate (114), wherein the pushing plate (112) and the first fixing plate (113) are arranged at the upper end of the brake rod (111), the pushing plate (112) is used in an adaptation mode with the upper side face of the rear end of the push rod (6), and the lower end of the brake rod (111) is connected with the second fixing plate (114).

5. A safety shield structure for a chain saw as set forth in claim 4, wherein: the brake assembly (11) further comprises a brake spring (115), the brake spring (115) being arranged between the first fixed plate (113) and the push plate (112).

6. A safety shield structure for a chain saw as set forth in claim 4, wherein: also comprises a driving assembly (15), wherein the driving assembly (15) comprises a driving shaft (151) and a large gear (152), and the large gear (152) is arranged on the driving shaft (151).

7. The safety shield structure of a chain saw as set forth in claim 6, wherein: the driving shaft (151) is provided with a torsion spring (16), and the lower end of the brake rod (111) is matched with the torsion spring (16).

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