CN218283989U

CN218283989U - Electric chain saw

Info

Publication number: CN218283989U
Application number: CN202222493304.9U
Authority: CN
Inventors: 黄永林; 李咸进; 王剑
Original assignee: Ningbo Tianming Tools Co ltd
Current assignee: Ningbo Tianming Tools Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-13
Anticipated expiration: 2032-09-21

Abstract

The utility model discloses an electric chain saw, which comprises a shell (1), a chain (3) arranged on a guide plate (2), a brake device (4) arranged inside the shell (1) and a push rod (5); in an initial state, the bottom end of the positioning pin (8) is positioned above the brake device (4); in a braking state, the top of the push rod (5) pushes backwards, then the bottom pushes the sliding block (6) forwards and downwards synchronously, and the push rod (5) pushes the sliding block (6) downwards until the bottom of the positioning pin (8) is abutted against the torsion spring (4.1) of the braking device (4) to brake. The electric chain saw adopts a set of positioning pin structure which can stretch up and down linearly, and is positioned by the fact that the positioning pin is abutted against the torsion spring of the brake device, so that the electric chain saw is good in braking effect, small in occupied space and basically free of abrasion.

Description

Electric chain saw

Technical Field

The utility model relates to an electric tool technical field specifically says an electric chain saw.

Background

There is the brake structure who discloses an electric chain saw at present, belongs to the electric chain saw field, has solved current electric chain saw structure and too complicated and lack the problem of safeguard measure. The brake structure of the electric chain saw comprises a torsional spring, a protection plate, a button and a rotor linked with a power structure of the electric chain saw, wherein the torsional spring is sleeved on the peripheral side face of the rotor, one end of the torsional spring is fixedly installed on the rotor, the other end of the torsional spring protrudes outwards relative to the peripheral side face of the rotor to form a contact, the protection plate is connected with a first stop dog, the button is connected with a second stop dog, the first stop dog and the second stop dog can move relative to the torsional spring and can be abutted to the contact to enable the torsional spring to generate elasticity for braking the power structure when moving to the motion track of the contact. This structure removes to offset with the torsional spring and the system stops through first dog and second dog, though can reach the braking, but the structure is complicated, and the installation and the radiating effect of other parts can be influenced to too much inner space who occupies the electric chain saw.

The brake structure of the electric chain saw comprises a brake disc, a protection plate, a button and a rotor linked with a power structure of the electric chain saw, the brake disc is fixedly mounted on the rotor, the protection plate is connected with a first friction plate, the button is connected with a second friction plate, the protection plate can drive the first friction plate to be far away from or close to and contact with the brake disc, and the button can drive the second friction plate to be far away from or close to and contact with the brake disc. The guard plate and the button can make the electric chain saw brake alone through the contact of first friction disc, second friction disc and brake disc respectively, and this kind of adoption friction disc structure uses the back for a long time, needs to change, and along with the wearing and tearing of friction disc, the effect can reduce moreover, and the friction disc powder after the wearing and tearing also can influence inside mainboard, after reaching certain degree, directly influences the radiating effect.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an adopt one set of sharp locating pin structure of stretching out and drawing back from top to bottom, through locating pin and brake equipment's torsional spring with offset and fix a position, braking effect is good, occupation space is little, does not have the electric chain saw of wearing and tearing basically.

The technical scheme of the utility model is that an electric chain saw with the following structure is provided, which comprises a shell, a chain arranged on a guide plate, a brake device arranged in the shell and a push rod; one part of catch bar stretches into in the shell and rotates with a connecting axle on the shell and be connected its characterized in that: the inner end of the push rod is connected with a sliding block, a fixed seat is arranged in the shell, a positioning pin, a spring and a pressing block are arranged on the fixed seat, the positioning pin moves up and down along the fixed seat, and the pressing block is fixed at the lower end of the positioning pin; the spring is sleeved on the positioning pin, one end of the spring abuts against the bottom surface of the top convex block of the fixed seat, the other end of the spring abuts against the top of the pressing block, the bottom end of the positioning pin penetrates through the first long hole of the sliding block and extends to the upper part of the brake device, the pressing block abuts against the top of the push rod under the pushing of the spring, and the bottom end of the positioning pin is located above the brake device in an initial state; in a braking state, the top of the push rod pushes backwards, then the bottom pushes the sliding block forwards and downwards synchronously, and the push rod pushes the sliding block downwards until the bottom of the positioning pin is abutted against a torsion spring of the braking device to brake.

The bottom of catch bar is equipped with the second slot hole, the one end of sliding block is equipped with the bolt, the bolt activity embedding is in the second slot hole.

The sliding block transversely sets up just first slot hole also transversely sets up, the width of briquetting is greater than the width of first slot hole, the briquetting moves along the top of sliding block, and spring promotion briquetting and sliding block move down simultaneously.

The fixing seat is provided with an upper positioning hole and a lower positioning hole, the top end of the positioning pin movably penetrates through the upper positioning hole, and the bottom end of the positioning pin movably penetrates through the lower positioning hole.

The shell is internally provided with a spring plate, the middle part of the spring plate is provided with a bulge, and the bulge is abutted against a convex rod on the push rod.

After the structure more than adopting, the utility model has the advantages of it is following: through the cooperation of the sliding block and the positioning pin connected with the pushing rod, the positioning pin and the torsion spring of the brake device realize braking. In an initial state, the bottom end of the positioning pin is positioned above the brake device; in a braking state, the top of the push rod pushes backwards, the sliding block is pushed forwards and downwards synchronously by the bottom, and the push rod pushes the sliding block downwards until the bottom of the positioning pin is abutted against a torsion spring of the braking device to brake. The positioning pin structure adopts a set of linear up-and-down telescopic positioning pin structure, and the positioning pin is abutted against the torsion spring of the brake device for positioning, so that the brake device has the advantages of good braking effect, small occupied space and basically no abrasion.

As the improvement, the bottom of catch bar is equipped with the second slot hole, the one end of sliding block is equipped with the bolt, the bolt activity embedding is in the second slot hole, drives the reciprocating motion of sliding block through the second slot hole, simple structure, and the good reliability.

As the improvement, the sliding block transversely sets up just first slot hole also transversely sets up, the width of briquetting is greater than the width of first slot hole, the briquetting moves along the top of sliding block, and spring push briquetting and sliding block move down simultaneously. Make the briquetting not influence the removal of sliding block, can promote the sliding block downwards again.

As an improvement, the fixed seat is provided with an upper positioning hole and a lower positioning hole, the top end of the positioning pin movably penetrates through the upper positioning hole, and the bottom end of the positioning pin movably penetrates through the lower positioning hole, so that the guidance quality of the positioning pin is improved, and the straight line can stretch up and down.

Drawings

Fig. 1 is an exploded schematic view of an electric chain saw according to the present invention;

fig. 2 is a schematic view of the connection between the braking structure and the braking device of the electric chain saw of the present invention;

fig. 3 is a schematic view of the electric chain saw according to the present invention in an unbraked state.

Fig. 4 is a schematic diagram of the braking state of the electric chain saw of the present invention.

Shown in the figure:

1. the shell, 2, baffle, 3, the chain, 4, brake equipment, 4.1, torsional spring, 5, catch bar, 5.1, second slot hole, 5.2, nose bar, 6, the sliding block, 6.1, first slot hole, 7, the fixing base, 7.1, go up the locating hole, 7.2, down the locating hole, 8, the locating pin, 9, the spring, 10, the briquetting, 11, the bolt, 12, the catch bar, 12.1, protruding.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1-4, the electric chain saw of the present invention comprises a housing 1, a chain 3 disposed on a guide plate 2, a brake device 4 disposed inside the housing 1, and a push rod 5; a part of the push rod 5 extends into the housing 1 and is rotatably connected with a connecting shaft on the housing 1. The bottom of catch bar 5 is equipped with second slot hole 5.1, the one end of sliding block 6 is equipped with bolt 11, bolt 11 activity embedding is in second slot hole 5.1. The push rod 5 is a lever, the middle position of the push rod is rotatably connected in the shell 1, the push rod 5 swings, and then the bolt 11 is driven through the second long hole 5.1, so that the sliding block 6 can do reciprocating motion.

The inner of catch bar 5 is connected with sliding block 6, be equipped with fixing base 7 in the shell 1, be equipped with locating pin 8, spring 9 and briquetting 10 on the fixing base 7, locating pin 8 reciprocates along fixing base 7. The fixing seat 7 is provided with an upper positioning hole 7.1 and a lower positioning hole 7.2, the top end of the positioning pin 8 movably penetrates through the upper positioning hole 7.1, and the bottom end movably penetrates through the lower positioning hole 7.2.

The pressing block 10 is fixed at the lower end of the positioning pin 8; spring 9 overlaps on locating pin 8, and one end offsets with the bottom surface of the top lug of fixing base 7, and the other end offsets with the top of briquetting 10, sliding block 6's first slot hole 6.1 is passed and brake equipment 4's top is extended to the bottom of locating pin 8, briquetting 10 offsets with the top of catch bar 5 under spring 9's promotion, sliding block 6 transversely sets up just first slot hole 6.1 also transversely sets up, the width of briquetting 10 is greater than first slot hole 6.1's width, briquetting 10 removes along sliding block 6's top, and spring 9 promotes briquetting 10 and sliding block 6 downstream simultaneously.

When the sliding block 6 is in reciprocating motion, the positioning pin 8 plays a role in guiding, one end of the sliding block 6 moves in the second long hole 5.1, and the other end of the sliding block is guided by the positioning pin 8, so that reciprocating motion in a plane can be ensured. Because the first long hole 6.1 of the sliding block 6 is penetrated by the positioning pin 8, when the sliding block 6 reciprocates, the first long hole 6.1 takes the positioning pin 8 as a guide to reciprocate. The slide 6 moves forward while moving downward, whereas the slide moves backward while moving upward.

The shell 1 is internally provided with an elastic sheet 12, the middle part of the elastic sheet 12 is provided with a bulge 12.1, and the bulge 12.1 is propped against a convex rod 5.2 on the push rod 5. After braking, i.e. after the pushing rod 5 swings backwards, the projection 12.1 of the spring plate 12 is compressed. After the pushing rod 5 loses external force, the elastic sheet 12 resets to push the pushing rod 5 to swing forwards to reset.

In the initial state, the bottom end of the positioning pin 8 is positioned above the brake device 4; the positioning pin 8 does not extend downwards, a certain distance is reserved between the positioning pin and the torsion spring 4.1 of the brake device 4, the brake device 4 is not triggered at the moment, and the electric chain saw can normally work.

In a braking state, the top of the push rod 5 pushes backwards, then the bottom pushes the sliding block 6 forwards and downwards synchronously, and the push rod 5 pushes the sliding block 6 downwards until the bottom of the positioning pin 8 collides with the torsion spring 4.1 of the braking device 4 to brake.

Claims

1. An electric chain saw comprises a shell (1), a chain (3) arranged on a guide plate (2), a brake device (4) arranged in the shell (1) and a push rod (5); one part of catch bar (5) stretches into in shell (1) and with shell (1) on a connecting axle rotate be connected its characterized in that: the inner end of the push rod (5) is connected with a sliding block (6), a fixed seat (7) is arranged in the shell (1), a positioning pin (8), a spring (9) and a pressing block (10) are arranged on the fixed seat (7), the positioning pin (8) moves up and down along the fixed seat (7), and the pressing block (10) is fixed at the lower end of the positioning pin (8); the spring (9) is sleeved on the positioning pin (8), one end of the spring is abutted against the bottom surface of the top convex block of the fixed seat (7), the other end of the spring is abutted against the top of the pressing block (10), the bottom end of the positioning pin (8) penetrates through the first long hole (6.1) of the sliding block (6) and extends to the upper part of the brake device (4), the pressing block (10) is abutted against the top of the push rod (5) under the pushing of the spring (9),

in an initial state, the bottom end of the positioning pin (8) is positioned above the brake device (4);

in a braking state, the top of the push rod (5) pushes backwards, then the bottom pushes the sliding block (6) forwards and downwards synchronously, and the push rod (5) pushes the sliding block (6) downwards until the bottom of the positioning pin (8) is abutted against the torsion spring (4.1) of the braking device (4) to stop.

2. An electric chain saw as set forth in claim 1 wherein: the bottom of catch bar (5) is equipped with second slot hole (5.1), the one end of sliding block (6) is equipped with bolt (11), bolt (11) activity embedding is in second slot hole (5.1).

3. An electric chain saw as set forth in claim 1 wherein: sliding block (6) transversely set up just first slot hole (6.1) also transversely set up, the width of briquetting (10) is greater than the width of first slot hole (6.1), briquetting (10) move along the top of sliding block (6), and spring (9) promote briquetting (10) and sliding block (6) downstream simultaneously.

4. An electric chain saw as defined in claim 1 wherein: the fixing seat (7) is provided with an upper positioning hole (7.1) and a lower positioning hole (7.2), and the top end of the positioning pin (8) movably penetrates through the upper positioning hole (7.1) and the bottom end movably penetrates through the lower positioning hole (7.2).

5. An electric chain saw as defined in claim 1 wherein: an elastic sheet (12) is arranged in the shell (1), a bulge (12.1) is arranged in the middle of the elastic sheet (12), and the bulge (12.1) is abutted to a convex rod (5.2) on the push rod (5).