CN221314506U

CN221314506U - Chain saw

Info

Publication number: CN221314506U
Application number: CN202322890178.5U
Authority: CN
Inventors: 李平; 李安; 张毅; 张桃
Original assignee: Sichuan Yibei Intelligent Equipment Co ltd
Current assignee: Sichuan Yibei Intelligent Equipment Co ltd
Filing date: 2023-10-27
Publication date: 2024-07-12
Anticipated expiration: 2033-10-27

Abstract

The utility model discloses a chain saw, which comprises a main body, a sprocket cover, a guide plate, a chain, a tensioning device and a knob device, wherein the main body is provided with a chain guide plate; the tensioning device comprises a rotating wheel and a tensioning wheel, the rotating wheel is arranged between the main body and the guide plate, the rotating wheel is rotatably connected to the main body, a groove for the rotating wheel to rotate is formed in the main body, the tensioning wheel is eccentrically and rotatably connected to the rotating wheel, and the tensioning wheel is meshed with the chain; a slot capable of meeting the arc-shaped movement track of the tensioning wheel is formed in one side of the guide plate, which is arranged in the chain wheel cover; the knob device is fixedly connected to the rotary wheel, and the chain wheel cover is provided with a braking device capable of preventing the tensioning device from rotating. According to the utility model, the tension wheel is rotated to make the tension wheel perform circumferential movement, pressure is applied to the chain, and the tightness is adjustable, so that the tightness of the chain can be conveniently and rapidly adjusted.

Description

Chain saw

Technical Field

The utility model relates to the field of garden tools, in particular to a chain saw.

Background

The chain saw is used for felling and making a power saw of a material, and the sawing mechanism is a chain, so that the chain saw is convenient to carry and easy to operate. Since the links in the chain of the chain saw wear in use, causing the chain to stretch and become loose on the guide plate, resulting in the chain saw not working properly, affecting cutting performance, and possibly creating a hazard, causing damage to the human body, it is necessary to constantly adjust the tension of the chain to keep the chain saw working properly.

In order to ensure normal work of the chain, the conventional mode adopts a bolt-fixing mode to replace and adjust the chain, tools are needed to be used for matching, but when the chain saw is used outdoors, the condition that the tools are not carried possibly occurs, and the adjustment of the chain is difficult to realize, so that a tensioning mechanism is usually arranged on the chain saw at present, so that the chain can be tensioned when loosening occurs, the realization of the cutting function of the chain is not influenced, a common tensioning device drives a series of adjusting mechanisms to move through a rotatable handle to realize the purpose of tensioning the saw chain and a fixed guide plate, and the tensioning mechanism generally has the problems of complex structure, difficult disassembly and assembly, poor reliability, unreliable locking and the like.

Disclosure of utility model

According to the chain saw, the tension wheel is rotated through the knob device outside the main body to enable the tension wheel to perform circumferential movement, pressure is applied to the chain, the tightness is adjustable, and the tightness of the chain can be conveniently and rapidly adjusted.

The technical scheme of the utility model is as follows:

A chain saw comprising a main body, a sprocket cover, a guide plate, a chain, a tensioning device and a knob device;

The tensioning device comprises a rotating wheel and a tensioning wheel, the rotating wheel is arranged between the main body and the guide plate, the rotating wheel is rotatably connected to the main body, a groove for the rotating wheel to rotate is formed in the main body, the tensioning wheel is eccentrically and rotatably connected to the rotating wheel, and the tensioning wheel is meshed with the chain; a slot capable of meeting the arc-shaped movement track of the tensioning wheel is formed in one side of the guide plate, which is arranged in the chain wheel cover;

the knob device is fixedly connected to the rotary wheel, and the chain wheel cover is provided with a braking device capable of preventing the tensioning device from rotating.

The working principle of the technical scheme is as follows:

according to the chain saw, the guide plate of the traditional chain saw is provided with the slot, the tensioning device is arranged at the slot, the guide plate and the chain are mounted on the main body, the rotating wheel drives the tensioning wheel to move circumferentially according to the tightness of the chain, and the tensioning wheel takes the rotating track of the rotating wheel as a rotating path and is fixed relative to the rotating wheel, so that tensioning force can be generated on the chain when the tensioning wheel moves circumferentially, after debugging is finished, the tightness of the tensioning device is fixed through the braking device, and the tensioning device is prevented from moving due to the fact that the chain generates pressure on the tensioning wheel when the chain saw performs cutting operation, so that the chain saw is loosened.

According to the utility model, the tension wheel is rotated to make the tension wheel perform circumferential movement, pressure is applied to the chain, and the tightness is adjustable, so that the tightness of the chain can be conveniently and rapidly adjusted.

In further technical scheme, the knob device includes a rotary rod, the one end and the concentric fixed connection of swiveling wheel of rotary rod, the other end of rotary rod stretches out sprocket cover and threaded connection from the fluting in has rotatory nut, but through the swiveling wheel that runs through the rotary rod of sprocket cover convenient and fast, drives tensioning wheel circumferential motion to implement the tensioning force to the chain.

In a further technical scheme, the rotating wheel is an oval wheel, the tensioning wheel is arranged at one end of the rotating wheel, the movement track of the tensioning wheel along with the movement of the rotating wheel can be increased, and when the head of the rotating wheel provided with the tensioning wheel is perpendicular to the chain, the tensioning degree reaches the maximum.

In a further technical scheme, the gear height of the rotating wheel is smaller than or equal to the height of the groove, so that the grooving area of the guide plate is reduced, and accidents caused by instability of the guide plate when the chain saw performs cutting operation are avoided.

In a further technical scheme, a fixed wheel is fixedly connected to the rotary rod, the fixed wheel is accommodated in the sprocket cover, and the fixed wheel is a gear; the braking device comprises arc teeth and a sliding block for pushing the arc teeth to move, the sliding block penetrates through the sprocket cover, the sliding block is in sliding connection with the sprocket cover, the tooth portions of the arc teeth are matched with tooth grooves of the fixed wheels, the arc teeth are driven to move towards the fixed wheels through the sliding block outside the sprocket cover, and the tooth portions of the arc teeth are meshed with the tooth grooves of the fixed wheels, so that braking of the fixed wheels is achieved.

In further technical scheme, the tail end of slider and arc tooth junction is equipped with the spring, the other end fixed connection of spring is in locating support the piece on the sprocket cover, through being equipped with the spring to the arc tooth along the direction of movement, improved the braking stability of arc tooth to the tight pulley.

In further technical scheme, the slider is located the hinge of sprocket cover outer end is connected with the slip cap, the length of slip cap is greater than the length of slider, the other end of slip cap is equipped with "L" type collude the piece, the sprocket cover be equipped with collude piece assorted anti-piece that colludes, the slider articulates there is the slip cap, conveniently slide the slider, when debugging overspeed device tensioner, be equipped with the piece of colluding of mutual matching through slip cap and sprocket cover, realize the fixed to the slider, avoid the slider to remove to take arc tooth to the tight pulley department because of the effort of spring, lead to the unable rotation of knob device and influence overspeed device tensioner's debugging.

In further technical scheme, the junction of main part and sprocket cover's below is not closed, can make things convenient for the sweeps that the chain saw produced when carrying out cutting operation to drop from the opening part, avoids the sweeps to block up and influences the cutting between sprocket cover and main part to influence the life of chain saw.

In a further technical scheme, the slotting is arranged on one side below the guide plate, the slotting is arranged below the guide plate, scraps can fall from the slotting, and excessive scraps cause the rotary wheel and the tensioning wheel to be unable to rotate.

In a further technical scheme, the rotation angle of the rotating wheel is smaller than or equal to 90 degrees, and the tension of the tensioning device can be maximized in the rotation process.

In further technical scheme, the baffle is equipped with the constant head tank, the main part pass through the reference column that runs through the constant head tank with the sprocket cover is connected, makes things convenient for sprocket cover location installation, avoids leading to the chain saw to drop the scheduling accident when cutting the operation because of the dislocation of sprocket cover.

The beneficial effects of the utility model are as follows:

1. when the chain saw is used for cutting for a long time, the chain becomes loose, the screw rod is rotated outside the chain wheel cover to rotate the rotating wheel to drive the tensioning wheel to make circumferential movement, pressure is applied to the chain, and the tightness is adjustable, so that the tightness of the chain can be conveniently and rapidly adjusted;

2. Be equipped with slidable arresting gear on the sprocket, after overspeed device tensioner debugs, drive the arc tooth through the slip slider outside the sprocket cover and remove to the tight pulley direction, the afterbody of arc tooth is equipped with the spring for under the effort of spring, tooth space interact chucking of tooth portion and the tight pulley of arc tooth, make the chain saw keep the rate of tension that has debugged.

Drawings

FIG. 1 is a perspective view of a chain saw according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the relationship of the chain saw body, chain and guide plate;

FIG. 3 is a block diagram of a tensioning device on a chain saw body;

FIG. 4 is a schematic diagram of the movement structure of the rotating wheel and the tensioning wheel;

FIG. 5 is a schematic view of a fixed sheave and brake apparatus;

FIG. 6 is a schematic view of a fixed sheave and arcuate teeth of another embodiment;

Fig. 7 is an enlarged view at a of fig. 5.

Reference numerals illustrate:

10. A main body; 11. positioning columns; 12. a groove; 20. a sprocket cover; 30. a guide plate; 31. a positioning groove; 32; slotting; 40. a driving wheel; 50. a chain; 60. a rotating wheel; 61. a tensioning wheel; 62. a rotating rod; 63. rotating the nut; 64. a fixed wheel; 70. a slide block; 71. a lock bolt; 72. a spring; 73. abutting blocks; 74. a sliding cap; 75. arc teeth.

Detailed Description

Embodiments of the present utility model are further described below with reference to the accompanying drawings.

Examples:

A chain saw, as shown in fig. 1 to 3, includes a main body 10, a sprocket cover 20, a guide plate 30, and a chain 50, and further includes a tensioning device and a knob device;

The tensioning device comprises a rotating wheel 60 and a tensioning wheel 61, wherein the rotating wheel 60 is arranged between the main body 10 and the guide plate 30, the rotating wheel 60 is rotatably connected to the main body 10, a groove 12 for the rotating wheel 60 to rotate is formed in the main body 10, the tensioning wheel 61 is eccentrically and rotatably connected to the rotating wheel 60, and the tensioning wheel 61 is meshed with the chain 50; a slot 32 which can meet the arc-shaped movement track of the tensioning wheel 61 is arranged on one side of the guide plate 30 arranged in the sprocket cover 20;

the knob device is fixedly connected to the rotary wheel, and a braking device capable of preventing the tensioning device from rotating is arranged on the sprocket cover 20.

According to the chain saw disclosed by the utility model, the guide plate 30 of the traditional chain saw is provided with the slot 32, the tensioning device is arranged at the slot 32, when the chain saw is specifically used, the guide plate 30 and the chain 50 are arranged on the main body 10, the rotating wheel 60 drives the tensioning wheel 61 to move circumferentially according to the tightness of the chain 50, and the tensioning wheel 61 takes the rotating track of the rotating wheel 60 as a rotating path and is relatively fixed with the rotating wheel 60, so that tensioning force can be generated on the chain 50 when the tensioning wheel 61 moves circumferentially, after adjustment is finished, the tensioning degree of the tensioning device is fixed through the braking device, and the tensioning device is prevented from moving due to the fact that the chain 50 generates pressure on the tensioning wheel 61 when the chain saw is used for cutting operation, so that the chain saw is loosened.

The tension pulley 61 is rotated to make circumferential movement, so that pressure is applied to the chain 50, and the tightness is adjustable, so that the tightness of the chain 50 can be conveniently and quickly adjusted.

In another embodiment, the knob device comprises a rotary rod 62, one end of the rotary rod 62 is concentrically and fixedly connected with the rotary wheel 60, the other end of the rotary rod 62 extends out of the sprocket housing 20 from the slot 32 and is in threaded connection with a rotary nut 63, and the rotary wheel 60 can be conveniently and rapidly rotated by penetrating the rotary rod 62 of the sprocket housing 20 to drive the tension wheel 61 to circumferentially move, so as to apply tension to the chain 50.

In another embodiment, as shown in fig. 4, the rotating wheel 60 is an oval wheel, the tensioning wheel 61 is arranged at one end of the rotating wheel 60, so that the movement track of the tensioning wheel 61 along with the rotating wheel 60 can be increased, and the tensioning degree is maximized when the head of the rotating wheel 60 provided with the tensioning wheel 61 is perpendicular to the chain 50.

In another embodiment, the gear height of the rotating wheel 60 is less than or equal to the height of the groove 12, reducing the area of the slot 32 to the guide plate 30, and avoiding accidents caused by instability of the guide plate 30 when the chain saw is cutting.

In another embodiment, as shown in fig. 5, a fixed wheel 64 is fixedly connected to the rotating rod 62, the fixed wheel 64 is accommodated inside the sprocket cover 20, and the fixed wheel 64 is a gear; the braking device comprises a lock plunger 71 and a sliding block 70 for pushing the lock plunger 71 to move, the sliding block 70 penetrates through the sprocket cover 20, the sliding block 70 is in sliding connection with the sprocket cover 20, the head of the lock plunger 71 is matched with a tooth slot of the fixed wheel 64, the lock plunger 71 is driven to move towards the fixed wheel 64 through the sliding block 70 outside the sprocket cover 20, and the head of the lock plunger 71 is meshed with the tooth slot of the fixed wheel 64, so that braking of the fixed wheel 64 is achieved.

In another embodiment, as shown in fig. 6, the braking device includes an arc tooth 75 and a sliding block 70 pushing the arc tooth 75 to move, the tooth portion of the arc tooth 75 is matched with the tooth slot of the fixed wheel 64, the arc of the arc tooth 75 is matched with the arc of the fixed wheel 64, the sliding block 70 penetrates through the sprocket cover 20, the sliding block 70 is slidably connected with the sprocket cover 20, the sliding block 70 drives the arc tooth 75 to move towards the fixed wheel 64 outside the sprocket cover 20, the tooth portion and the arc of the arc tooth 75 are matched with the fixed wheel 64, and a plurality of tooth portions clamp the fixed wheel 64, so that braking on the fixed wheel 64 can be enhanced.

In another embodiment, the tail end of the connection part between the sliding block 70 and the arc-shaped tooth 75 is provided with a spring 72, the other end of the spring 72 is fixedly connected to a supporting block 73 arranged on the sprocket cover 20, and the braking stability of the arc-shaped tooth 75 to the fixed wheel 64 is improved by arranging the spring 72 on the arc-shaped tooth 75 along the moving direction.

In another embodiment, as shown in fig. 7, the slider 70 is hinged to the outer end of the sprocket cover 20, the length of the slider 74 is greater than that of the slider 70, the other end of the slider 74 is provided with an L-shaped hook block, the sprocket cover 20 is provided with a counter hook block matched with the hook block, the slider 70 is hinged with the slider cap 74, the slider 70 is conveniently slid, when the tensioning device is debugged, the slider 70 is fixed by the hook blocks matched with the sprocket cover 20 through the slider cap 74, and the problem that the slider 70 moves to the position of the fixed wheel 64 due to the action force of the spring 72 and then the knob device cannot rotate to influence the debugging of the tensioning device is avoided.

In another embodiment, the connection between the main body 10 and the lower part of the sprocket cover 20 is not closed, so that the scraps generated during the cutting operation of the chain saw can be conveniently dropped from the opening, and the scraps are prevented from blocking between the sprocket cover 20 and the main body 10 to affect the cutting, thereby affecting the service life of the chain saw.

In another embodiment, the slot 32 is provided on the lower side of the guide plate 30, the slot 32 is provided below the guide plate 30, and the scraps can fall from the slot 32, so that the rotating wheel 60 and the tensioning wheel 61 cannot rotate due to excessive scraps.

In another embodiment, the rotation angle of the rotation wheel 60 is less than or equal to 90 degrees, and the tension of the tensioning device can be maximized during the rotation process.

In another embodiment, the guide plate 30 is provided with a positioning groove 31, and the main body 10 is connected with the sprocket cover 20 through a positioning post 11 penetrating through the positioning groove 31, so that the sprocket cover 20 is convenient to position and install, and accidents such as dropping of the chain 50 caused by dislocation of the sprocket cover 20 during cutting operation of the chain saw are avoided.

The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. A chain saw comprising a main body, a sprocket cover, a guide plate and a chain, and further comprising a tensioning device and a knob device;

The knob device is fixedly connected to the rotating wheel, and the chain wheel cover is provided with a braking device capable of preventing the tensioning device from rotating.

2. The chain saw as in claim 1, wherein the knob assembly comprises a rotary lever having one end fixedly connected to the rotary wheel concentrically and the other end extending from the slot to the sprocket cover and threadably connected to the rotary nut.

3. The chain saw as in claim 1, wherein the rotator wheel is an oval wheel and the tensioner wheel is disposed at one end of the rotator wheel.

4. The chain saw as recited in claim 1, wherein a gear height of said rotary wheel is less than or equal to a groove height.

5. The chain saw as recited in claim 2, wherein a fixed wheel is fixedly connected to the rotary bar, the fixed wheel being housed inside the sprocket housing, the fixed wheel being a gear; the braking device comprises arc teeth and a sliding block for pushing the arc teeth to move, the sliding block penetrates through the sprocket cover, the sliding block is in sliding connection with the sprocket cover, and tooth portions of the arc teeth are matched with tooth grooves of the fixed wheels.

6. A chain saw according to claim 5, wherein a spring is arranged at the tail end of the connection part of the sliding block and the arc-shaped teeth, and the other end of the spring is fixedly connected with a supporting block arranged on the chain wheel cover.

7. A chain saw according to claim 5 wherein the slider is hinged to the outer end of the sprocket housing and has a sliding cap with a length greater than the length of the slider, the other end of the sliding cap having an L-shaped hook block, and the sprocket housing having a counter-hook block matching the hook block.

8. The chain saw as in claim 1, wherein the rotation angle of the rotator wheel is 90 degrees or less.

9. The chain saw as in claim 1, wherein the guide plate is provided with a positioning slot and the main body is connected to the sprocket housing by a positioning post extending through the positioning slot.