CN213197942U

CN213197942U - Saw chain tensioning device of electric chain saw and electric chain saw

Info

Publication number: CN213197942U
Application number: CN202021199319.9U
Authority: CN
Inventors: 田建强
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-05-14
Anticipated expiration: 2030-06-24

Abstract

The utility model relates to a saw chain tensioning device of an electric chain saw and the electric chain saw, which comprises a main shell, a cover plate, a guide plate, a lock catch component and an elastic part B, wherein the main shell is internally provided with a mounting seat, and the cover plate covers the mounting seat; the latch assembly includes: the guide plate comprises a fastener, an elastic part A and a pressing part, wherein the fastener is provided with a buckle, and the guide plate is matched with the buckle to form a bayonet; one end of the elastic piece A is abutted against the mounting seat, and the other end of the elastic piece A is abutted against the bottom of the fastener; the pressing piece penetrates through the cover plate, a long slotted hole is formed in the guide plate along the length direction, and the pressing piece penetrates through the long slotted hole to abut against the top of the fastener; one end of the elastic part B is abutted against the mounting seat, the other end of the elastic part B is connected to the rear end of the guide plate, and the elastic part B pushes the buckle to be separated from the bayonet through the abutting part, so that the guide plate is pushed by the elastic part B to slide along the length direction of the guide plate. The utility model discloses a saw chain overspeed device tensioner has simple structure, easy dismounting, characteristics that the reliability is high.

Description

Saw chain tensioning device of electric chain saw and electric chain saw

Technical Field

The utility model relates to an electricity chain saw technical field, concretely relates to saw chain overspeed device tensioner and electricity chain saw of electricity chain saw.

Background

The electric chain saw cuts by utilizing a rotary chain saw blade, and is widely applied to construction operations such as forest felling, wood processing and the like. Generally, an electric chain saw comprises a main shell, a cover plate, a guide plate and a saw chain, wherein the saw chain is sleeved on the periphery of the guide plate, so that the tightness of the saw chain is difficult to master, the saw chain is too tight or too loose, the normal operation of the electric chain saw is affected, and even more, the saw chain can be separated from the guide plate, and safety accidents are caused.

In the corresponding technology, adopt overspeed device tensioner to adjust, but the device ubiquitous structure is complicated, the dismouting is difficult, the poor problem of reliability, urgently needs to carry out optimal design to it.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a saw chain tensioner with simple structure, easy assembly and disassembly, and high reliability; it is a further object to provide an electric chain saw incorporating the saw chain tensioning device.

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

a saw chain tensioning device of an electric chain saw comprises a main shell, a cover plate, a guide plate, a lock catch assembly and an elastic piece B, wherein an installation seat is arranged in the main shell, and the cover plate covers the installation seat; the latch assembly includes: the guide plate comprises a fastener, an elastic part A and a pressing part, wherein the fastener is provided with a buckle, and the guide plate is matched with the buckle to form a bayonet; one end of the elastic piece A is abutted against the mounting seat, and the other end of the elastic piece A is abutted against the bottom of the fastener; the pressing piece penetrates through the cover plate, a long slotted hole is formed in the guide plate along the length direction, and the pressing piece penetrates through the long slotted hole to abut against the top of the fastener; one end of the elastic part B is abutted against the mounting seat, the other end of the elastic part B is connected to the rear end of the guide plate, and the elastic part B pushes the buckle to be separated from the bayonet through the abutting part, so that the guide plate is pushed by the elastic part B to slide along the length direction of the guide plate.

Further, the pressing piece is a fastener, the fastener penetrates through the slotted hole and then is fastened with the main shell, and the front end of the fastener abuts against the fastener.

Further, the main casing body comprises an upper casing body and a lower casing body, the cover plate covers the outer side of the upper casing body, the rear end of the guide plate is slidably arranged between the upper casing body and the cover plate, the fastener is a bolt, and a nut matched with the bolt is arranged on the upper casing body.

Furthermore, an annular groove is formed in the middle of the fastener, and the bottom of the pressing piece is abutted against the annular groove.

Furthermore, the elastic pieces B are symmetrically arranged on two sides of the lock catch assembly.

Furthermore, the elastic part B is a spring, a sliding rod is arranged between the spring and the guide plate, a connecting part is arranged on the sliding rod, and a connecting hole is formed in the guide plate corresponding to the connecting part.

The electric chain saw comprising the saw chain tensioning device further comprises a motor and a saw chain, wherein the saw chain is sleeved on the periphery of the guide plate and is driven to rotate by the motor.

Furthermore, a guide sliding groove for accommodating the elastic piece B is arranged on the mounting seat.

Furthermore, the mounting seat is provided with a mounting groove of the locking component, two sides of the rear end of the fastener are provided with limiting columns in an outward protruding mode, and the rear end of the mounting groove is correspondingly provided with a limiting groove for limiting the rear end of the fastener to be separated from the mounting groove.

The utility model provides a one or more technical scheme has following technological effect or advantage at least:

firstly, the top side of the fastener is provided with a pressing part, and the bottom side of the fastener is provided with an elastic part A, so that the fastener can easily and stably penetrate into or separate from a bayonet to lock and unlock the locking and unlocking assembly, and when the locking and unlocking assembly is in any state, the fastener can achieve dynamic balance, and the locking and unlocking assembly has the advantages of simple and stable structure, ingenious and reasonable design, and convenient and rapid operation;

and secondly, the effect of automatically tensioning the saw chain is realized through elastic connection between the rear end of the guide plate and the mounting seat, the tightness of the saw chain is automatically adjusted, the adverse effect caused by over-tightness or over-tightness of the saw chain is eliminated, and the service life of the saw chain is prolonged.

Drawings

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

fig. 2 is a schematic view of an internal structure of an electric chain saw according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a tensioner according to an embodiment of the present invention;

fig. 4 is an enlarged view of a portion a of fig. 3.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings.

It will be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal", and the like, refer to orientations or positional relationships illustrated in the drawings, which are used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present invention.

In addition, when an element is referred to as being "secured to," "mounted to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, a saw chain tensioner of an electric chain saw includes: main casing body 11, baffle 30, apron 12, hasp subassembly and elastic component B62, establish the mount pad in the main casing body 11, baffle 30 rear end cunning is located on the mount pad, apron 12 approximately fits the baffle 30 outside, hasp subassembly and elastic component B62 set up in between baffle 30 and mount pad.

Specifically, the lock catch assembly comprises: the clamping device comprises a fastener, a pressing piece 51 and an elastic piece A55, wherein a mounting groove is formed in the mounting seat, the fastener is arranged in the mounting groove, a buckle 52 protruding towards the guide plate is arranged at the front end of the fastener, a bayonet for the buckle 52 to extend into is formed in the guide plate 30, and a chamfer is arranged at the front end of the buckle 52 for smoother clamping; the limiting columns 54 are arranged on two sides of the rear end of the fastener in an outward protruding mode, the limiting grooves 13 for limiting the rear end of the fastener to be separated are correspondingly formed in the rear ends of the mounting grooves, specifically, the limiting grooves 13 limit the movement of the limiting columns 54, and therefore the fastener rotates around the axis of the limiting columns 54 or synchronously moves up and down in the limiting columns 54 in a translation mode. The pressing element 51 penetrates through the cover plate 12, the guide plate 30 is provided with a long slot hole 32 along the length direction, the top of the fastener is provided with an annular groove 53, the pressing element 51 passes through the long slot hole 32 to abut against the annular groove 53, and the peripheral wall of the annular groove 53 limits the lateral displacement of the pressing element 51, so that the pressing element 51 can vertically act on the fastener with a constant pushing force. One end of the elastic piece A55 abuts against the mounting seat, the other end abuts against the bottom of the fastener, and the elastic piece A55 provides elastic support for the fastener. The unlocking process of the lock catch assembly comprises the following steps: under the action of external thrust, the pressing piece 51 pushes the fastener against elastic force to make the buckle 52 separate from the bayonet 31, and the fastener is in a balanced state under the combined action of the elastic piece A55 and the pressing piece 51; the locking process is as follows: the external pushing force applied to the pressing member 51 is weakened or removed, the catch 52 is engaged with the bayonet 31, and locking is achieved by the elastic member a 55.

Preferably, the pressing element 51 is a fastener, the fastener penetrates through the slotted hole 32 and is fastened with the main housing 11, and a front end of the fastener abuts against the fastener. The pressing piece is adopted as the fastener, the saw chain tensioning device has the advantages of being low in cost and convenient to operate, an operator can easily obtain a matched tool and act on the fastener, and accordingly the locking and buckling assembly is released, the guide plate moves forwards to tension the saw chain, the whole set of action is simple, rapid and in-place in one step, and the saw chain is tensioned rapidly.

Specifically, in an embodiment, the main housing 11 includes an upper housing 14 and a lower housing, a mounting seat is disposed in the lower housing, the upper housing 14 covers the outside of the mounting seat, the cover plate 12 covers the outside of the upper housing 14, and the rear end of the guide plate 30 is slidably disposed between the upper housing 14 and the cover plate 12. The fastening member is a bolt, and the bolt penetrates through the long slot hole on the guide plate 30 and then is fastened with a nut correspondingly arranged on the upper shell 14. The embodiment comprises an upper shell and a lower shell, wherein the upper shell is fastened with the bolt, so that the upper shell has a better fastening point and is fixed stably; meanwhile, the upper shell and the lower shell are of a detachable connecting structure, the upper shell can be designed independently to be matched with the long slotted hole of the guide plate and fastened with the bolt, and meanwhile, when the saw chain is disassembled and assembled, the upper shell plays a role in protecting parts in the mounting seat, the parts are prevented from being exposed, damage is avoided, and the service life of the device is prolonged easily.

In another embodiment, the pressing member 51 is a push rod, and the locking assembly is released by an external handle, a button, or manually pressing.

The saw chain tensioning device is characterized in that a guide sliding groove is formed in the mounting seat along the length direction of the guide plate 30, a sliding rod 60 is arranged in the guide sliding groove, the sliding rod 60 slides stably and effectively in the guide sliding groove, a connecting portion 61 perpendicular to the rod body is arranged in the front of the sliding rod 60 in a protruding mode, connecting holes are correspondingly formed in the guide plate 30, preferably, a spring is arranged on the elastic piece B62, the spring is sleeved on the rear portion of the sliding rod 60, one end, far away from the sliding rod 60, of the spring abuts against the mounting seat, and the guide plate 30 moves forwards to tension the saw chain 40.

In another embodiment, the bottom side of the guide plate 30 is integrally formed with a connecting portion connected to one end of a spring, and the other end of the spring abuts against the mounting seat.

Preferably, the spring B62 is arranged to symmetrically align the sides of the latch assembly. The elastic parts B62 distributed uniformly can further improve the smoothness of the guide plate moving process, so that the saw chain can be tensioned accurately and quickly.

When the saw chain is loosened for replacement, the action process of the tensioning device is explained in detail as follows: loosening fastening bolts penetrating through the cover plate, and disassembling the cover plate; the replaceable saw chain is sleeved on the periphery of the guide plate and is arranged on the mounting seat; the cover plate and the outer side of the guide plate are covered; and screwing a bolt which penetrates through the guide plate and is fastened with the main shell on the cover plate, wherein the bolt pushes the fastener to enable the buckle to be separated from the bayonet, so that the elastic part B is released to push the guide plate to move forwards to tension the saw chain.

It should be noted that, the direction of the tensioning saw chain is defined as front, and the reverse direction is defined as back; the side of the pressing piece close to the fastener is front, and the opposite direction is back.

The elastic member described herein is an elastic member including, but not limited to, a spring to lock the fastener or push the fence to tension the saw chain.

The utility model also provides an electric chain saw, this electric chain saw contain motor, saw chain and overspeed device tensioner, the saw chain cover is located the baffle periphery just is rotatory by motor drive, and above-mentioned embodiment is referred to this overspeed device tensioner's concrete structure, because this electric chain saw has adopted above-mentioned all technical scheme, consequently, has all beneficial effects that above-mentioned embodiment has at least, here, no longer gives unnecessary details.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The saw chain tensioning device of the electric chain saw is characterized by comprising a main shell (11), a cover plate (12), a guide plate (30), a lock catch assembly and an elastic piece B, wherein a mounting seat is arranged in the main shell (11), and the cover plate (12) is mounted on one side of the main shell (11);

the latch assembly includes: the guide plate comprises a fastener, an elastic piece A (55) and a pressing piece (51), wherein a buckle (52) is arranged on the fastener, and a bayonet (31) is formed in the guide plate (30) in a manner of being matched with the buckle (52); one end of the elastic piece A (55) is abutted against the mounting seat, and the other end of the elastic piece A is abutted against the bottom of the fastener; the pressing piece (51) penetrates through the cover plate (12), a long slotted hole (32) is formed in the guide plate (30) along the length direction, and the pressing piece (51) penetrates through the long slotted hole (32) to abut against the top of the fastener;

one end of the elastic part B (62) abuts against the mounting seat, the other end of the elastic part B is connected to the rear end of the guide plate (30), the buckle (52) is pushed by the abutting part (51) to be separated from the bayonet (31), and the elastic part B (62) pushes the guide plate (30) to slide along the length direction of the guide plate (30).

2. The saw chain tensioner of an electric chain saw as recited in claim 1, wherein the pressing member (51) is a fastener, the fastener is fastened to the main housing (11) after penetrating the slot hole (32), and a front end of the fastener abuts against the fastener.

3. The saw chain tensioner of an electric chain saw as recited in claim 2, wherein said main housing (11) comprises an upper housing (14) and a lower housing, said cover plate (12) covers the outer side of said upper housing (14), the rear end of said guide plate (30) is slidably disposed between said upper housing (14) and said cover plate (12), said fastening member is a bolt, and said upper housing (14) is provided with a nut engaged with said bolt.

4. The saw chain tensioner of an electric chain saw as recited in claim 1, wherein said fastener has an annular groove (53) in the middle, and the bottom of said pressing member (51) abuts against said annular groove (53).

5. The saw chain tensioner of an electric chain saw as recited in claim 1, wherein said spring member B (62) is a plurality of sets symmetrically spaced on either side of said catch assembly.

6. The saw chain tensioner of an electric chain saw as recited in claim 1, wherein the elastic member B (62) is a spring, a sliding rod (60) is disposed between the spring and the guide plate (30), a connecting portion (61) is disposed on the sliding rod (60), and the guide plate (30) is provided with a connecting hole corresponding to the connecting portion (61).

7. An electric chain saw comprising the saw chain tensioning device of any one of claims 1 to 6, further comprising a motor (20) and a saw chain (40), wherein the saw chain (40) is sleeved on the periphery of the guide plate (30) and is driven to rotate by the motor (20).

8. An electric chain saw according to claim 7, wherein the mounting base is provided with a guide runner receiving the resilient member B (62).

9. The electric chain saw as recited in claim 7, wherein the mounting seat is provided with a mounting groove of the lock catch assembly, the rear end of the fastener is provided with a limiting post (54) protruding outwards from both sides, and the rear end of the mounting groove is correspondingly provided with a limiting groove for limiting the rear end of the fastener to be separated.