CN217571130U

CN217571130U - Double-layer chain saw guide plate

Info

Publication number: CN217571130U
Application number: CN202221768303.4U
Authority: CN
Inventors: 鲁彭君
Original assignee: Ningbo Luxi Saw Chain Technology Co ltd
Current assignee: Ningbo Luxi Saw Chain Technology Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-10-14
Anticipated expiration: 2032-07-07

Abstract

The utility model discloses a double-layer chain saw guide plate, which comprises two sub-plates with opposite mirror images; the outer side surfaces of the two sub-plates are parallel to each other; the inner side surface of each sub-plate comprises a middle boss and a peripheral concave edge; the concave edge at least surrounds three edges of the boss except the rear edge; the end surfaces of the two bosses are overlapped and attached tightly, and a guide groove for installing a saw chain is formed in a gap between the two concave edges; compared with an integral guide plate, the integral guide plate avoids the complexity and the uncontrollable property of deep groove processing, and has the advantages of simple and convenient processing and low production cost. For trinity baffle, the utility model discloses the chain saw baffle has lacked middle splint, has reduced the use of material, has also reduced the connection process between board and the board simultaneously.

Description

Double-layer chain saw guide plate

Technical Field

The utility model relates to an electric chain saw's field especially relates to a be applied to double-deck formula chain saw baffle of electric chain saw.

Background

A guide plate of a chain saw is an important part for tensioning, supporting and guiding a saw chain in a certain direction in the chain saw.

The guide plate of the existing chain saw mainly has two types of integration and trinity. The integral chain saw guide plate is formed by milling a whole material according to the size and shape requirements of the guide plate; the three-in-one chain saw guide plate is formed by welding or riveting two side plates and a middle clamping plate which are formed by stamping or other modes.

For example: patents CN201030589Y, CN202106428U and CN207402908 all disclose a three-in-one chain saw guide plate, which comprises a first plate, a clamping plate and a second plate, wherein the first plate and the second plate correspond to each other, the clamping plate is sandwiched between the first plate and the second plate, and the periphery of the clamping plate is retracted into the periphery of the first plate and the second plate to form a guide groove for installing a saw chain.

However, the integral guide plate needs a large amount of milling equipment, is complex to process, long in production period and high in production cost, and is generally only suitable for guide plates without guide wheels at the heads.

In order to ensure the strength of the guide plate and the width of the guide groove, the three-layer plate of the three-in-one chain saw guide plate needs a certain thickness, so that the chain saw guide plate is thick, heavy and high in material cost; and the alignment welding process of the three-layer plate is complex and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cost is lower, and light in weight and the reliable double-deck formula chain saw baffle of intensity provide the preparation method of this kind of double-deck formula chain saw baffle simultaneously, simple process, and quality control is stable.

The utility model provides a technical scheme that above-mentioned technical problem provided does: the double-layer chain saw guide plate comprises two sub plates which are opposite in a mirror image manner;

the outer side surfaces of the two sub-plates are parallel to each other;

the inner side surface of each sub-plate comprises a middle boss and a peripheral concave edge;

the concave edge at least surrounds three edges of the boss except the rear edge;

the end surfaces of the two bosses are overlapped and attached tightly, and a gap between the two concave edges forms a guide groove for installing a saw chain.

The utility model provides an above-mentioned technical problem provide preferred technical scheme do: the tail end of the branch plate is inwards concave to form a notch, the boss extends to the notch, and the concave edge is in a transverse U shape.

The utility model provides an above-mentioned technical problem provide preferred technical scheme do: the sub-plate is formed by integrally stamping a metal plate, and a groove corresponding to the boss and a convex edge corresponding to the concave edge are formed on the outer side surface of the sub-plate.

The utility model provides an above-mentioned technical problem provide preferred technical scheme do: the edge of the concave edge is locally hardened by a high-frequency quenching method.

The utility model provides an above-mentioned technical problem provide preferred technical scheme do: and a guide wheel is arranged between the concave edges at the front ends of the branch plates, and when the saw chain is installed, the saw chain bypasses the guide wheel from back to front along the guide groove.

The utility model provides an another technical scheme that above-mentioned technical problem provided does: the double-layer chain saw guide plate comprises two sub-plates;

the sub-plates are integrally stamped by metal plates to form a middle inner convex body and a peripheral flat body;

the inner convex body forms a boss on the inner side surface of the sub-plate, and a groove is formed on the outer side surface of the sub-plate;

the flat whole body wraps at least three sides of the inner convex body except the rear side;

the two sub-plates are arranged in parallel and symmetrically, the inner surfaces of the two inner convex bodies are overlapped and attached tightly and connected in a spot welding mode, the gaps between the inner surfaces of the two flat bodies oppositely form guide grooves extending to the outer edge, and the guide grooves are used for installing saw chains.

The utility model provides a another technical scheme's that above-mentioned technical problem provided preferred is: the edge of the inner surface of the flat integral body is locally hardened by a high-frequency quenching method.

The utility model provides a another technical scheme's that above-mentioned technical problem provided preferred is: the tail end of the branch plate is inwards concave to form a notch, and the inner convex body extends to the notch.

The utility model provides a another technical scheme's that above-mentioned technical problem provided preferred is: an accommodating space for arranging the guide wheel is formed between the flat bodies at the front ends of the branch plates, and when the saw chain is installed, the saw chain bypasses the guide wheel from back to front along the guide groove.

The utility model provides a another technical scheme's that above-mentioned technical problem provided preferred is: the rear section of the inner convex body is provided with a positioning groove for assembling and positioning and length adjusting holes positioned at two sides of the positioning groove.

Compared with the prior art, the utility model has the advantages that the chain saw guide plate of the utility model is only formed by connecting two sub-plates. Compared with an integral guide plate, the integral guide plate avoids the complexity and the uncontrollable property of deep groove processing, and has the advantages of simple and convenient processing and low production cost. For trinity baffle, the utility model discloses the chain saw baffle has lacked middle splint, has reduced the use of material, has also reduced the connection process between board and the board simultaneously.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on the concept of a composition or construction of the object being described and may include exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a first schematic view of a chainsaw guide plate according to a preferred embodiment of the present invention;

FIG. 2 is a second schematic view of a chainsaw guide of a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view of a portion plate of a chain saw guide of a preferred embodiment of the present invention;

FIG. 4 is a cross-sectional view of a chain saw guide of a preferred embodiment of the present invention;

FIG. 5 is a first schematic view of a chainsaw guide plate according to another preferred embodiment of the present invention;

FIG. 6 is a second schematic view of a chain saw guide of another preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are used for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the double-deck chain saw guide includes opposite ends y1 and y2 in the longitudinal direction, and opposite ends y3 in the width direction. When the chain saw guide plate is installed in the electric chain saw, the tail end y2 of the chain saw guide plate is close to the main machine of the electric chain saw, and the front end y1 of the chain saw guide plate extends out of the main machine of the electric chain saw.

As shown in fig. 2 to 4, in the present embodiment, the double-deck chain saw guide includes two divided plates a arranged in mirror image, each divided plate a including two opposing surfaces of an inner side surface h and an outer side surface f in the thickness direction. And for the double-layer chain saw guide plate, the inner side surfaces h of the two sub-plates A are mutually spliced and matched, and the outer side surfaces f are mutually parallel.

As shown in FIGS. 2-4, the inner side surface h of each sub-plate A comprises a boss 1 in the middle and a concave edge 2 at the periphery of the boss 1, and the concave edge 2 extends from the root of the boss 1 to the outer edge of the sub-plate A. And the concave edge 2 encloses at least three sides of the boss 1 except the rear side. Namely, the boss 1 is positioned in the middle, the concave edge 2 is positioned at the periphery of the boss 1, and the concave edge 2 at least surrounds the front edge, the left edge and the right edge of the boss 1.

As shown in fig. 2 and 4, the end surfaces of the bosses 1 of the two sub-plates a are overlapped, attached and connected, and the end surface of the boss 1 is also called as a boss surface. And the concave edges 2 of the two sub-plates A are oppositely formed with a guide groove 5, and the guide groove 5 is used for installing a saw chain. It should be noted that the width and depth of the guide groove 5 are adapted to the saw chain, and that the teeth of the saw chain should extend beyond the outer edge of the double-layered chain saw guide after mounting.

It should be noted that a drive sprocket driven by a motor is provided in the main body of the electric chain saw on the rear side of the guide plate of the chain saw, and the saw chain is looped around the guide groove 5 and the drive sprocket. When the motor is running, the saw chain is driven by the drive sprocket to move along the guide channel 5 on the double-deck chain saw guide.

In this embodiment, the chain saw guide is formed by only two divided plates a being connected. Compared with an integral guide plate, the deep groove machining complexity and uncontrollable performance are avoided, the machining is simple and convenient, and the production cost is low. Compared with a three-in-one guide plate, the chain saw guide plate of the embodiment has the advantages that the number of middle clamping plates is reduced, the material consumption is reduced, and meanwhile, the connecting processes between the plates are also reduced.

Further, as shown in fig. 1-4, in the present embodiment, each of the sub-panels a is formed by stamping a flat metal plate. That is, the punched sub-plate a includes two parts, one is the inner protrusion 100 located at the center, and the other is the flat body 200 located at the periphery of the inner protrusion 100. The flat body 200 surrounds at least three sides of the convex body 100 except the rear side.

As shown in fig. 3, the flat body 200 means: maintaining the flatness of the sheet metal element, which comprises two flat surfaces parallel to each other: a first inner surface 10 and a first outer surface 20. The convex body 100 means: the inner side surface of the sub-plate A protrudes out of the flat body 200, and the outer side surface of the sub-plate A is recessed into the flat body 200.

The inner convex body 100 includes a second inner surface 30, an inner transition surface 40, a second outer surface 50, and an outer transition surface 60. The first inner surface 10 and the second inner surface 30 are distributed in a step shape, the second inner surface 30 protrudes outwards from the first inner surface 10, the first outer surface 20 and the second outer surface 50 are distributed in a step shape, and the second outer surface 50 is inwards recessed from the first outer surface 20. The inner transition surface 40 and the outer transition surface 60 are preferably beveled.

That is, as shown in fig. 1 to 3, each of the plates a is formed with the boss 1 and the concave edge 2 at the periphery of the boss 1 on the inner side by punching, and the groove 3 corresponding to the boss 1 and the convex edge 4 corresponding to the concave edge 2 are formed on the outer side of the plate a.

Further, as shown in fig. 2 and 4, the second inner surfaces 30 of the inner protrusions 100 of the two divided plates a are overlapped and attached tightly and are connected by spot welding, thereby combining the two divided plates a into a whole. And the first inner surfaces 10 of the flat bodies 200 of the two partial plates a have a gap therebetween, and the guide groove 5 is formed in the gap, namely, the guide groove 5 is formed by the first inner surfaces 10 of the two partial plates a and the inner transition surface 40 in a surrounding manner.

Based on the method, the method for preparing the chain saw guide plate at least comprises the following steps:

a, step a: and cutting a flat metal plate to prepare a plate splitting blank, wherein the plate splitting blank is long and narrow.

Step b: arranging the blank body of the splitting plate between a female die and a male die for punching so as to form a boss 1 extending to the tail end y2 and a concave edge 2 extending to the side edge on one side, and correspondingly forming a groove 3 corresponding to the boss 1 and a convex edge 4 corresponding to the concave edge 2 on the other side, thereby preparing a splitting plate A;

step c: the two sub-plates A are opposite in mirror image, the end surfaces of the two bosses 1 are opposite, overlapped and attached tightly, and the two concave edges 2 form a gap extending to the side edge;

step d: the end surfaces of the two bosses 1 are connected into a whole by spot welding, and a guide groove 5 for installing a saw chain is formed between the two concave edges 2.

Therefore, compared with the integral chain saw guide plate, the preparation of the chain saw guide plate of the embodiment omits the milling notch groove formed by aiming at the guide groove 5 in the processing, and the plate A is divided by integrally forming through punching, so that the process is simplified, the investment of a large amount of milling equipment is omitted, the production efficiency is improved, and the production cost is reduced.

Compare with trinity chain saw baffle, not only save the operation position of spot welding, moreover based on same baffle thickness, the thickness of dividing board A also can be made thickly in the chain saw baffle of double-deck formula, and thicker branch board A has higher intensity.

The concave-convex structure formed by stamping is used for relieving and sharing the impact force borne by the sub-plate A when the sub-plate A is impacted by strong external force, thereby further strengthening the toughness and the stress strength of the sub-plate A.

Therefore, the double-layer chain saw guide plate has higher strength than the three-in-one chain saw guide plate under the condition of the same thickness of the guide plate. When the strength of the guide plate is the same, the thickness of each sub-plate A can be reduced, so that the weight of the guide plate is reduced, and the material consumption is reduced.

And in the stamping process of the step b, the flatness of the sub-plate A can be shaped, so that the flatness of the plate surface which is difficult to control originally can be ensured at one time during stamping forming, and the integral quality of the guide plate is greatly improved.

In addition, the groove 3 on the outer side face f of each sub-plate A can greatly reduce the contact area between the guide plate and a sawed object in the using process, the friction force borne by the sub-plate A is reduced, the space for containing saw dust is correspondingly increased for the groove 3, the saw dust is prevented from blocking the chain saw, the sawing efficiency is greatly improved, the guide plate is not easy to wear, and the service life of the chain saw is prolonged.

The structure and the processing technology of the chain saw guide plate are suitable for electric chain saws of all specifications and models, the width of the guide groove 5 can be conveniently changed by adjusting the height of the lug boss 1 of the sub plate A, and therefore the chain saw guide plate is suitable for saw chain with different middle guide tooth thicknesses

For example, when the guide groove is used for a saw chain with a middle guide tooth thickness of 0.058 inches, the width of the guide groove 5 is 1.6mm, the height of the boss 1 is controlled to be 0.8mm when the split plates A of the guide plate of the chain saw are stamped, and after the two split plates A are attached and welded, the width of the guide groove 5 of the guide plate is 1.6mm.

Preferably, as shown in fig. 1 to 4, in the present embodiment, the rear end y2 of the sub-plate a is recessed inward to form a notch n, the notch n is recessed from the driving sprocket, the inner protrusion 100 of the sub-plate a extends to the notch n, and the flat body 200 has a transverse U shape, extends from the rear to the front of the inner protrusion 100 from one side of the inner protrusion 100, and is folded back to the other side of the inner protrusion 100 around the front end of the inner protrusion 100.

Based on the convenience of processing, in this embodiment, the structure that divides board A for following axis symmetry, consequently in the production, need not to divide board A to pair, reduced process flow for processing is convenient more saves time.

As shown in fig. 1 and 2, it is generally necessary to provide a positioning groove 70 and a length adjustment hole 80 on a guide plate of a chain saw for the assembly of the guide plate with a main body of a power chain saw and for the adaptation to different power saw types. The positioning groove 70 extends along the central axis and is located at the rear section of the guide plate and penetrates both side surfaces of the guide plate. The length-adjusting holes 80 are provided at both sides of the positioning groove 70. In this embodiment, the positioning groove 70 and the length-adjusting hole 80 are formed on the inner convex body 100.

In this embodiment, the positioning groove 70 and the length adjusting hole 80 are preferably formed by punching when preparing the blank, that is, in step a, the rear section of the blank is punched with a long positioning groove 70 penetrating through both sides; after step b, the positioning groove 70 is located at the position of the boss 1 and the groove 3.

This is because the plate member is now a flat plate member and is easily held in place. And the blank is not formed yet, and has no requirement on extrusion caused by processing.

Preferably, in the embodiment, the edge of the concave edge 2 of the sub-plate A, namely the part k where the edge of the guide groove 5 is in contact friction with the saw chain, is locally hardened by a high-frequency quenching method. Further improve the anti bending ability and the wear resistance of baffle, increase of service life.

It should be noted that this partial hardening step may be provided after step a by edge treatment of one side of the blank; or between step b and step c. Of course, if the step b is arranged after the step a, the subsequent step b needs to identify two surfaces of the blank body and perform the corresponding stamping process, and the process is complicated and difficult to operate. It is more reasonable to arrange between step b and step c.

In another embodiment, the flat body 200 has a width at the front end of the inner convex body 100 that is significantly larger than that at both sides, and forms a receiving space t at the front end that can be matched with the guide wheel B. The guide roller B may be disposed between the concave edges 2 of the front ends of the divided plates a. When the saw chain is installed, the saw chain is folded back along the guide groove 5 from the rear to the front around the guide wheel B, so that the endless saw chain is wound between the drive sprocket and the guide wheel B.

In the step a, punching matching holes penetrating through two side surfaces at the front section of the plate dividing blank body; after step b, the mating holes are located at the flat body 200 where the concave edge 2 and the convex edge 4 are located. The fitting hole is used for installing a guide wheel shaft provided with a guide wheel B.

During the assembly process, a sub-plate is placed in the direction that the boss 1 faces upwards, and for convenience of description, the sub-plate is defined as a first sub-plate. Then the guide wheel shaft is inserted into the matching hole of the first sub plate, and the outer end of the guide wheel shaft is exposed out of the first sub plate. Then the guide wheel is sleeved on the upper side of the guide wheel shaft. Finally, another divided plate defined as a second divided plate is correspondingly covered above the first divided plate, and the guide wheel shaft passes through the matching hole of the second divided plate. This completes the mirror-image opposition arrangement in step c above.

The double-deck chain saw guide provided by the present invention has been described in detail, and the principle and embodiments of the present invention are explained herein using specific examples, which are only used to help understand the present invention and the core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The double-layer chain saw guide plate is characterized by comprising two sub-plates which are opposite in a mirror image manner;

the outer side surfaces of the two sub-plates are parallel to each other;

the concave edge surrounds at least three edges of the boss except the rear edge;

the end surfaces of the two bosses are overlapped and attached tightly, and a guide groove for installing a saw chain is formed in a gap between the two concave edges.

2. The double-deck chain saw guide of claim 1 wherein the rear end of the subplate is recessed to form a notch, the boss extending into the notch, the recess being in the form of a transverse U.

3. The double-deck chain saw guide of claim 1, wherein the branch plate is integrally stamped from a metal plate, and the outer side surface of the branch plate is formed with a groove corresponding to the boss and a convex edge corresponding to the concave edge.

4. The double-deck chain saw guide of claim 1, wherein the edge of the recessed edge is partially hardened by induction hardening.

5. The double-deck chain saw guide of claim 1 wherein a guide roller is disposed between the recessed edges of the front ends of the sub-plates, and wherein the saw chain is guided along the guide slot and around the guide roller from the rear to the front when the saw chain is installed.

6. The double-layer chain saw guide plate is characterized by comprising two split plates;

the flat whole body at least surrounds the other three sides of the inner convex body except the rear side;

the two sub-plates are arranged in parallel and symmetrically, the inner surfaces of the two inner convex bodies are overlapped and attached firmly and are connected in a spot welding mode, the gaps between the inner surfaces of the two flat integral bodies oppositely form guide grooves extending to the outer edges, and the guide grooves are used for installing saw chains.

7. The double-deck chain saw guide of claim 6, wherein the edge of the inner surface of the flat body is partially hardened by induction hardening.

8. The double-deck chain saw guide of claim 6, wherein the rear end of the sub-plate is recessed to form a notch, the inner protrusion extending into the notch.

9. The double-deck chain saw guide of claim 6, wherein the flat bodies at the front ends of the sub-plates define therebetween a receiving space for a guide roller, and the saw chain is guided along the guide groove and passes around the guide roller from the rear to the front.

10. The double-deck chain saw guide of claim 6, wherein the rear section of the inner convex body is provided with a positioning groove for fitting positioning and length adjusting holes on both sides of the positioning groove.