Chain saw with adjusting structure

Abstract

The chain saw with the adjusting structure comprises a cover plate, a base, a chain, a guide plate, a push plate, a knob, a transmission spring and a spiral wheel, the chain, the guide plate and the push plate are located between the cover plate and the base, the front end of the chain and the front end of the guide plate penetrate out of the cover plate and the base, the knob is arranged on the cover plate in a rotating mode, and the spiral wheel is movably arranged in the cover plate. The lower end of the spiral wheel penetrates out of the cover plate and abuts against the push plate, the spiral wheel is provided with an adjusting groove, the push plate is provided with a boss, the transmission spring is connected with the rotary knob and the spiral wheel and drives the spiral wheel to rotate along with the rotary knob, and the inner wall of the adjusting groove rotates along with the spiral wheel to abut against the boss and force the guide plate to move forwards. A nut is arranged in the knob, a threaded column penetrating out of the guide plate, the push plate and the spiral wheel is arranged on the base, and the nut is arranged on the threaded column in a sleeving mode and screwed on the threaded column along with rotation of the knob. By means of the structure, the functions of pressing the guide plate through one key and adjusting the tensioning degree of the chain saw are achieved, the complexity of a chain saw adjusting structure is simplified, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of garden tools, especially to a chain saw with adjusting structure. BACKGROUND

[0002] The electric chain saw is a tool commonly used in garden work, and the electric chain saw on the market needs to adjust the tension of the chain during use, which is generally adjusted by a screwdriver. The tension of the chain saw needs to be adjusted by the user's experience, and it often needs to be adjusted repeatedly. The tensioning structure of the chain saw and the pressing structure of the guide plate are two separate structures, which makes the overall structure of the chain saw complex and the operation cumbersome. Therefore, it needs to be improved. SUMMARY

[0003] The utility model discloses in view of the defects of the chain saw adjusting structure and the guide plate pressing structure being separated in prior art, the overall structure being complex and the operation being cumbersome, provides a new chain saw with adjusting structure.

[0004] In order to solve the above technical problems, the utility model realizes the following technical scheme:

[0005] A chain saw with adjusting structure, including apron, base, chain, guide plate and push plate, the chain is around the outside of the guide plate, the push plate is arranged on the upper surface of the guide plate, the chain, the guide plate and the push plate are located between the apron and the base, the front end of the chain, the guide plate is from the apron and the base, it also includes knob, transmission spring and disc spiral wheel, the knob is rotatably arranged on the apron, the disc spiral wheel is movably arranged in the apron, the lower end of the disc spiral wheel is from the apron and is in abutment with the push plate, the lower end of the disc spiral wheel is provided with adjusting groove, the push plate is provided with the boss inserted into the adjusting groove, one side of the transmission spring is connected with the lower end of the knob, the other end of the transmission spring is connected with the upper surface of the disc spiral wheel and drives the disc spiral wheel to rotate with the knob, the inner wall of the adjusting groove is in abutment with the boss and forces the guide plate to move forward as the disc spiral wheel rotates;The nut is movably arranged in the knob, the base is provided with the threaded column from the guide plate, the push plate, the disc spiral wheel and inserted into the apron, the nut is sleeved on the threaded column and is screwed on the threaded column with the rotation of the knob.

[0006] By rotating the knob, the nut can be screwed on the threaded column, so that the apron can be fixed on the base, and the pressing of the guide plate is realized. At the same time, by rotating the knob, the disc spiral wheel can be driven to rotate by the transmission spring, and the push plate can be pushed to drive the guide plate to move forward by the adjusting groove and the boss, so that the function of one-key pressing the guide plate and adjusting the tension of the chain saw is realized. The whole structure is fixed without blocking ring, which simplifies the complexity of the chain saw tensioning structure and the guide plate pressing structure, reduces the difficulty of chain saw adjustment, reduces the production cost, and facilitates use.

[0007] As a preferred, the chain saw with the adjusting structure, the knob is provided with a fixing cavity, the transmission spring is inserted into the fixing cavity and the two ends of the transmission spring abut against the inner side wall of the fixing cavity in the horizontal direction, the lower side of the transmission spring protrudes from the fixing cavity, the disc spiral wheel is provided with a circumferentially distributed rack, the pitch of the transmission spring is the same as the pitch of the rack, the lower side of the transmission spring is inserted into the upper end of the rack and is engaged with the rack, and the knob drives the transmission spring to drive the rack to force the disc spiral wheel to rotate.

[0008] The transmission spring is arranged in the fixing cavity in the horizontal direction, additional connecting members or complex mechanical structures are reduced, and the tensioning structure of the chain saw is more compact. The pitch of the transmission spring is matched with the pitch of the rack, the transmission spring and the rack can be stably and accurately engaged, the risk of slipping or jamming of the disc spiral wheel when the knob drives the disc spiral wheel to rotate through the transmission spring is reduced, and the reliability when the disc spiral wheel is driven to rotate through the transmission spring is improved.

[0009] As a preferred, the chain saw with the adjusting structure, the transmission spring is a special-shaped spring, the outer diameter of the two ends of the transmission spring is smaller than that of the middle section of the transmission spring, and the two ends of the transmission spring are separated from the rack.

[0010] The transmission spring is a special-shaped spring and the outer diameter of the two ends of the transmission spring is small, so that the transmission spring does not participate in the rack driving, and the transmission spring will not be jammed when the knob is rotated, and the smoothness of the disc spiral wheel driven by the transmission spring is improved.

[0011] As a preferred, the chain saw with the adjusting structure, the number of the transmission springs is multiple, and the multiple transmission springs are uniformly distributed on the upper surface of the disc spiral wheel.

[0012] The number of the transmission springs is multiple and the transmission springs are uniformly distributed on the upper surface of the disc spiral wheel, so that the driving force on the disc spiral wheel is increased, and the smoothness when the tensioning degree of the chain saw is adjusted is improved.

[0013] As a preferred, the chain saw with the adjusting structure, the adjusting groove is spiral, the threaded column passes out from the center of the adjusting groove, and the disc spiral wheel drives the adjusting groove to rotate around the boss.

[0014] The adjusting groove is spiral, the tensioning degree of the chain saw can be more finely adjusted, and the controllability and accuracy of the tensioning degree adjustment of the chain saw are improved.

[0015] As a preferred, the chain saw with the adjusting structure, the rotation angle C of the boss in the clockwise direction is not greater than 15 degrees.

[0016] The rotation angle C of the convex platform in the clockwise direction is not more than 15 degrees, so that the force component of the retreating force of the guide plate can prevent the loosening of the spiral wheel, thereby effectively preventing the loosening of the chain.

[0017] Preferably, the chain saw with the adjusting structure has the anti-loosening rib arranged on the convex platform and a plurality of interval convex ribs arranged in the adjusting groove, and the anti-loosening rib is inserted into or withdrawn from the adjacent convex ribs with the rotation of the spiral wheel.

[0018] The cooperation of the anti-loosening rib and the convex rib improves the limiting of the rotation of the spiral wheel, and the loosening of the chain can be more effectively prevented.

[0019] Preferably, the chain saw with the adjusting structure has the first cavity and the second cavity arranged in the cover plate from top to bottom, the upper end of the spiral wheel has an outer diameter greater than the inner diameter of the second cavity, the upper end of the spiral wheel is attached to the bottom of the first cavity, and the lower end of the spiral wheel is pressed on the upper surface of the push plate and passes through the second cavity; the knob is arranged in the first cavity and rotates, the inner surface of the knob is provided with a matching hole, the nut is movably arranged in the matching hole and moves in the vertical direction in the matching hole, and the nut is screwed on the threaded column with the rotation of the knob.

[0020] The upper end of the spiral wheel is attached to the bottom of the first cavity, and the lower end of the spiral wheel is pressed on the push plate and passes through the second cavity, so that the spiral wheel is provided with good support and protection, the damage of external impact and impurities is reduced, and the service life of the spiral wheel is prolonged; the nut can slide up and down in the matching hole, the compression can be adjusted after the cover plate is basically in place, and assembly is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is an exploded structural schematic view of the utility model;

[0022] Fig. 2 It is an exploded structural schematic view of the utility model from another angle of the hidden base;

[0023] Fig. 3 It is a partial sectional view of the utility model;

[0024] Fig. 4 It is an exploded structural schematic view of the utility model of the transmission spring, the spiral wheel and the push plate;

[0025] Fig. 5 It is an exploded structural schematic view of the utility model of the nut, the spiral wheel and the push plate;

[0026] Fig. 6 It is a structural schematic view of the utility model reflecting the rotation angle C.

[0027] Explanation of reference signs: 1, cover plate; 11, first cavity; 12, second cavity; 2, base; 21, threaded column; 3, chain; 31, guide plate; 4, push plate; 41, boss; 411, anti-off rib; 5, knob; 51, fixed cavity; 52, matching hole; 6, transmission spring; 7, disc spiral wheel; 71, adjusting groove; 711, convex rib; 72, rack; 8, nut. DETAILED DESCRIPTION

[0028] The utility model will be described in further detail below in combination with the drawings Figs. 1-6 and specific embodiments, but they are not limitations on the utility model:

[0029] Example 1

[0030] As Figs. 1-6 shown, a chain saw with adjusting structure, including cover plate 1, base 2, chain 3, guide plate 31 and push plate 4, chain 3 surrounds the outside of guide plate 31, push plate 4 is arranged on the upper surface of guide plate 31, chain 3, guide plate 31 and push plate 4 are between cover plate 1 and base 2, the front end of chain 3, guide plate 31 is from cover plate 1 and base 2 and goes out, still include knob 5, transmission spring 6 and disc spiral wheel 7, knob 5 rotation is arranged on cover plate 1, disc spiral wheel 7 is movably arranged in cover plate 1, the lower end of disc spiral wheel 7 goes out from cover plate 1 and is in abutment with push plate 4, the lower end of disc spiral wheel 7 is provided with adjusting groove 71, the boss 41 of push plate 4 is inserted into adjusting groove 71, one side of transmission spring 6 is connected with the lower end of knob 5, the other end of transmission spring 6 is connected with the upper surface of disc spiral wheel 7 and drives disc spiral wheel 7 to rotate with knob 5, the inner wall of adjusting groove 71 is in abutment with boss 41 with the rotation of disc spiral wheel 7, and guide plate 31 is forced to move forward;Nut 8 is movably arranged in knob 5, the threaded column 21 of base 2 is provided with from guide plate 31, push plate 4, disc spiral wheel 7 and is inserted into cover plate 1, nut 8 is sleeved on threaded column 21 and is screwed on threaded column 21 with the rotation of knob 5.

[0031] As preferred, the knob 5 is provided with a fixed cavity 51, the transmission spring 6 is inserted into the fixed cavity 51, and the two ends of the transmission spring 6 are abutted on the inner side wall of the fixed cavity 51 in the horizontal direction, the lower side of the transmission spring 6 protrudes from the fixed cavity 51, the disc spiral wheel 7 is provided with a circumferentially distributed rack 72, the pitch size of the transmission spring 6 is the same as the tooth pitch size of the rack 72, the lower side of the transmission spring 6 is inserted into the upper end of the rack 72 and engaged with the rack 72, the knob 5 drives the transmission spring 6 to drive the rack 72 to force the disc spiral wheel 7 to rotate.

[0032] As preferred, the transmission spring 6 is a profile spring, the outer diameter of the two ends of the transmission spring 6 is smaller than the outer diameter of the middle section of the transmission spring 6, and the two ends of the transmission spring 6 are separated from the rack 72.

[0033] As preferred, a plurality of the transmission spring 6 is provided, and the plurality of the transmission spring 6 is uniformly distributed on the upper surface of the spiral wheel 7.

[0034] As preferred, the adjusting groove 71 is in a spiral shape, the threaded column 21 passes through the center of the adjusting groove 71, and the spiral wheel 7 drives the adjusting groove 71 to rotate around the boss 41.

[0035] As preferred, the rotation angle C of the boss 41 in the clockwise direction is not greater than 15 degrees.

[0036] As preferred, the boss 41 is provided with an anti-extraction rib 411, the adjusting groove 71 is provided with a plurality of spaced-apart convex ribs 711, and the anti-extraction rib 411 is inserted into or withdrawn from between the adjacent convex ribs 711 with the rotation of the spiral wheel 7.

[0037] As preferred, the cover plate 1 is provided with a first cavity 11 and a second cavity 12 distributed from top to bottom, the upper end of the spiral wheel 7 has an outer diameter greater than the inner diameter of the second cavity 12, the upper end of the spiral wheel 7 is attached to the bottom of the first cavity 11, and the lower end of the spiral wheel 7 passes through the second cavity 12 and is pressed on the upper surface of the push plate 4; the knob 5 is rotationally arranged in the first cavity 11, the inner surface of the knob 5 is provided with a matching hole 52, the nut 8 is movably arranged in the matching hole 52 and moves in the vertical direction in the matching hole 52, and the nut 8 is screwed on the threaded column 21 with the knob 5.

[0038] Specifically, as shown in Figs. 1-4 the first strip-shaped hole and the second strip-shaped hole extend in the horizontal direction, the first hole and the second hole are arranged on the guide plate 31 on the two sides of the first strip-shaped hole, the push plate 4 is integrally formed with a positioning column on the lower surface, the push plate 4 is provided with a third hole, and the positioning column and the third hole are arranged on the two sides of the second strip-shaped hole. The lower surface of the push plate 4 is arched upward to form the boss 41 and the anti-extraction rib 411, and the boss 41 is arranged on the upper surface of the right side of the push plate 4.

[0039] When the push plate 4 is fixed on the upper surface of the guide plate 31, the first strip-shaped hole and the second strip-shaped hole are first aligned, then the positioning column is aligned with the first hole and inserted into the first hole for insertion fit, and then the screw is passed through the second hole and screwed, so that the guide plate 31 and the push plate 4 can be fixed through the screw, the second hole and the third hole.

[0040] The lower end of the knob 5 is provided with a first buckle, the first cavity 11 is provided with a second buckle, the lower end of the knob 5 is inserted into the first cavity, the first buckle is below the second buckle and is attached to the lower surface of the second buckle, so that the knob 5 can rotate in the first cavity along the second buckle through the first buckle.

[0041] As shown in the embodiment of the application, the matching holes 52 are distributed at the center of the lower surface of the knob 5, the number of the fixing cavities 51 is two and is symmetrically distributed outside the matching holes 52, the number of the transmission springs 6 corresponds to the number of the fixing cavities 51, the upper side of the transmission spring 6 is inserted into the fixing cavity 51, the lower side of the transmission spring 6 is placed on the upper surface of the disc spiral wheel 7 and is engaged with the rack 72, and the two ends of the transmission spring 6 are suspended on the rack 72. Figs. 1-6

[0042] More specifically, when the guide plate 31 needs to be pressed, the disc spiral wheel 7 is placed on the cover plate 1 and the boss 41 is inserted into the adjusting groove 71, the upper end of the threaded column 21 is out of the disc spiral wheel 7, then the lower end of the knob 5 is inserted into the first cavity 11 and the first buckle and the second buckle are buckled with each other, then the knob 5 is rotated to tighten the nut 8 on the threaded column 21, so that the cover plate 1, the base 2 and the disc spiral wheel 7 can press the guide plate 31.

[0043] When the tension of the chain 3 needs to be adjusted, the knob 5 is only rotated to drive the disc spiral wheel 7 to rotate through the transmission spring 6, and then the guide plate 31 is forced to move forward in a fine manner through the adjusting groove 71 and the boss 41, so that the tension of the chain 3 is accurately adjusted. Because the two ends of the transmission spring 6 have a small outer diameter and are suspended above the rack 72, the transmission spring 6 will not be stuck when the disc spiral wheel 7 is pushed to rotate.

[0044] In the embodiment of the application, the outer surface of the knob 5 is provided with a rotation mark, which can remind the user of the rotation direction of the knob 5 when the tension of the chain saw is adjusted.

[0045] The above structure realizes the functions of one-key pressing the guide plate 31 and adjusting the tension of the chain 3, the structure does not need a retaining ring, simplifies the complexity of the chain saw tension structure and the guide plate 31 pressing structure, reduces the difficulty of adjusting the chain saw, reduces the production cost, and is convenient to use.

[0046] In summary, the above only describes the preferred embodiments of the application, and any changes and modifications made within the scope of the application should be included in the scope of the application.​

Claims

1. A chain saw with adjusting structure, comprising a cover plate (1), a base (2), a chain (3), a guide plate (31) and a push plate (4), the chain (3) is around the outside of the guide plate (31), the push plate (4) is arranged on the upper surface of the guide plate (31), the chain (3), the guide plate (31) and the push plate (4) are located between the cover plate (1) and the base (2), the front end of the chain (3), the guide plate (31) and the push plate (4) is out of the cover plate (1) and the base (2), characterized in that: Further including a knob (5), a transmission spring (6) and a disc spiral wheel (7), the knob (5) is rotatably arranged on the cover plate (1), the disc spiral wheel (7) is movably arranged in the cover plate (1), the lower end of the disc spiral wheel (7) penetrates out of the cover plate (1) and abuts against the push plate (4), the lower end of the disc spiral wheel (7) is provided with an adjusting groove (71), the push plate (4) is provided with a boss (41) inserted into the adjusting groove (71), one side of the transmission spring (6) is connected with the lower end of the knob (5), the other end of the transmission spring (6) is connected with the upper surface of the disc spiral wheel (7) and drives the disc spiral wheel (7) to rotate with the knob (5), the inner wall of the adjusting groove (71) abuts against the boss (41) and forces the guide plate (31) to move forward with the rotation of the disc spiral wheel (7); the knob (5) is movably provided with a nut (8), the base (2) is provided with a threaded column (21) penetrating out of the guide plate (31), the push plate (4) and the disc spiral wheel (7) and inserted into the cover plate (1), the nut (8) is sleeved on the threaded column (21) and screwed on the threaded column (21) with the rotation of the knob (5). ​ 2. The chain saw with an adjusting structure according to claim 1, characterized in that: The knob (5) is provided with a fixed cavity (51), the transmission spring (6) is inserted into the fixed cavity (51) and the two ends of the transmission spring (6) abut against the inner side wall of the fixed cavity (51) in the horizontal direction, the lower side of the transmission spring (6) protrudes from the fixed cavity (51), the disc spiral wheel (7) is provided with a circumferentially distributed rack (72), the pitch size of the transmission spring (6) is the same as the pitch size of the rack (72), the lower side of the transmission spring (6) is inserted into the upper end of the rack (72) and engaged with the rack (72), the knob (5) drives the transmission spring (6) to drive the rack (72) to force the disc spiral wheel (7) to rotate.

3. The chain saw with an adjusting structure according to claim 2, characterized in that: The transmission spring (6) is a special-shaped spring, the outer diameter of the two ends of the transmission spring (6) is smaller than the outer diameter of the middle section of the transmission spring (6), and the two ends of the transmission spring (6) are separated from the rack (72).

4. The chain saw with an adjusting structure according to claim 1, characterized in that: A plurality of transmission springs (6) are provided, and the plurality of transmission springs (6) are uniformly distributed on the upper surface of the disc spiral wheel (7).

5. The chain saw with an adjusting structure according to claim 1, characterized in that: The adjusting groove (71) is spiral, the threaded column (21) penetrates out of the center of the adjusting groove (71), and the disc spiral wheel (7) drives the adjusting groove (71) to rotate around the boss (41).

6. The chain saw with an adjusting structure according to claim 5, characterized in that: The rotation angle C of the boss (41) in the clockwise direction is not greater than 15 degrees.

7. The chain saw with an adjusting structure according to claim 1, characterized in that: The boss (41) is provided with an anti-disengagement rib (411), and the adjusting groove (71) is provided with a plurality of spaced-apart convex ribs (711), with the rotation of the disc spiral wheel (7), the anti-disengagement rib (411) is inserted between adjacent convex ribs (711) or withdrawn from adjacent convex ribs (711).

8. The chain saw with an adjusting structure according to claim 1, characterized in that: The cover plate (1) is provided with a first cavity (11) and a second cavity (12) distributed from top to bottom, the upper end outer diameter of the disc spiral wheel (7) is greater than the inner diameter of the second cavity (12), the upper end of the disc spiral wheel (7) is attached to the bottom of the first cavity (11), the lower end of the disc spiral wheel (7) penetrates out of the second cavity (12) and is pressed on the upper surface of the push plate (4), the knob (5) is rotationally arranged in the first cavity (11), the inner surface of the knob (5) is provided with a matching hole (52), the nut (8) is movably arranged in the matching hole (52) and moves in the vertical direction in the matching hole (52), and the nut (8) is screwed on the threaded column (21) with the knob (5).

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