Grass trimmer capable of being quickly disassembled

Abstract

The utility model discloses a grass trimmer capable of being disassembled quickly. The grass trimmer comprises an output shaft and a cutting piece arranged on the output shaft. The output shaft is provided with a protection unit which covers the shaft end and is used for fixing a cutting piece. The protection unit is detachably arranged at the shaft end of the output shaft; through the innovative design of the protection unit and the holding piece, the blade is rapidly mounted and dismounted, meanwhile, the threaded structure is prevented from being exposed to the external environment, and the durability of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grass trimmer technical field, especially a grass trimmer of quick detachable. BACKGROUND

[0002] As a common equipment in the field of garden tools, the cutting piece fixing structure of the grass trimmer directly affects the work efficiency and maintenance convenience. The cutting piece fixing mode of the traditional grass trimmer on the market currently adopts the combination structure of ordinary nut and gasket, and the cutting piece is pressed on the shaft end of the motor output shaft through threaded connection. However, the technical scheme has the following significant defects in actual application:

[0003] 1. Low dismounting efficiency: the cutting piece replacement needs to use special tools such as wrench to tighten or loosen the nut, and the operation steps are complicated, especially in the scene of field operation or frequent replacement of the cutting piece, which consumes time and effort and seriously affects the work efficiency.

[0004] 2. Thread structure is easy to be damaged: the threaded connection part of the nut and the motor output shaft is exposed to the working environment for a long time, and the shaft end is easy to collide and rub with the ground sandstone and hard objects during the operation of the grass trimmer, which causes the thread to wear and even deform; once the thread is damaged, not only the cutting piece fixing fails, but also the motor output shaft may be scrapped due to abnormal thread engagement, which greatly increases the maintenance cost. INVENTION CONTENTS

[0005] The utility model provides a grass trimmer of quick detachable in view of the deficiency in the prior art, realizes the quick installation and dismounting of the blade through the innovative design of the protection unit and the holding piece, and avoids the exposure of the thread structure to the external environment, thereby improving the durability of the equipment.

[0006] To solve the above technical problems, the utility model solves them through the following technical scheme: a grass trimmer of quick detachable, comprising an output shaft and a cutting piece arranged on the output shaft;

[0007] A protection unit for fixing the cutting piece is arranged on the output shaft to cover the shaft end.

[0008] The protection unit is detachably arranged on the shaft end of the output shaft.

[0009] In the above scheme, preferably, the protection unit comprises a protection cover and a holding piece movably arranged on the protection cover.

[0010] The holding piece can be held and driven by the operator to rotate the protection cover after being moved.

[0011] In the above scheme, preferably, the protection cover is provided with a containing groove for containing the holding piece, and the holding piece is rotatably arranged on the protection cover and can be contained in or separated from the containing groove through rotation.

[0012] Preferably, the holding member comprises a rotating part and a holding part, and the protective cover is provided with a rotating groove matched with the rotating part.

[0013] Preferably, the protective cover is provided with a plurality of limiting members matched with the rotating groove to prevent the holding member from being separated from the rotating groove during rotation.

[0014] Preferably, the accommodating groove comprises a rotating groove matched with the rotating part and a receiving groove matched with the holding part.

[0015] Preferably, the rotating part is symmetrically arranged and extends inward from both sides of the holding part, and the holding part is provided with a protruding part.

[0016] The receiving groove is symmetrically arranged, and the protruding part is arranged outside the protective cover after the holding part is arranged in the receiving groove.

[0017] Preferably, the holding part is made of a magnetic metal, and the bottom of the receiving groove is provided with a magnet for attracting the holding part.

[0018] The side wall of the receiving groove is provided with a buckle for limiting the holding part from being separated.

[0019] Preferably, the protective cover is integrally formed, and a nut matched with the thread of the output shaft is arranged in the center of the protective cover.

[0020] Preferably, the rotating groove and the receiving groove are connected in a penetrating manner.

[0021] The holding member is integrally formed and has a special-shaped ring shape, and the cross-sectional diameter is circular.

[0022] The protruding part is provided with a connecting part, the receiving groove extends outward to form a connecting groove for accommodating the connecting part.

[0023] The holding member is arranged on the end face of the protective cover away from the output shaft.

[0024] The beneficial effects of the utility model are as follows:

[0025] 1. Quick assembly and disassembly: through the unfolding and receiving design of the holding member, the protective unit can be manually tightened or loosened without tools, and the blade replacement efficiency is significantly improved.

[0026] 2. Thread protection: the protective cover covers the threaded connection part of the output shaft, effectively isolates the invasion of sand and gravel, and prolongs the service life of the thread.

[0027] 3. Structural reliability: the multiple fixing mechanisms of the limiting member, the magnet and the buckle ensure stable work of the holding member under high-speed rotating conditions and improve the structural stability of the protective unit. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0029] Figure 2 It is the decomposition structure schematic diagram of the utility model at the output shaft and the protection unit.

[0030] Figure 3 It is the decomposition structure schematic diagram of the utility model protection unit.

[0031] Figure 4 It is the working state schematic diagram of the utility model holding piece at the protection unit.

[0032] Figure 5 It is the three-dimensional structure schematic diagram of the utility model protection cover.

[0033] Figure 6 It is the three-dimensional structure schematic diagram of the utility model holding piece.

[0034] Figure 7 It is the nut position schematic diagram of the utility model at the protection cover. DETAILED DESCRIPTION

[0035] The utility model will be further described in detail in combination with the specific implementation and the drawings: refer to Figures 1-7 .

[0036] A quick detachable grass trimmer, including output shaft 1 and cutting piece 2 set on output shaft 1, specifically, the output shaft 1 is the output shaft of grass trimmer drive motor, and drive motor is set on grass trimmer main body, and cutting piece 2 is cutting blade or grass rope etc., and the centre is sleeved on output shaft 1, and the shaft end of output shaft 1 is provided with the protection unit 3 for covering the shaft end and being used to fix cutting piece 2, after cutting piece 2 is sleeved on output shaft 1, then protection unit 3 is fixed on the shaft end of output shaft 1 and is protected and fastened.

[0037] The protection unit 3 can be detachably set on the shaft end of output shaft 1, specifically, the protection unit 3 includes protection cover 301 and holding piece 302 movably set on protection cover 301, the protection cover 301 is integrally formed, and the centre is embedded with the nut 4 for thread cooperation with output shaft 1, as Figure 7 The nut 4 is embedded in the wall body in the centre of protection cover 301, and protection cover 301 is left with the through hole for the passage of output shaft 1, the shaft end of output shaft 1 is a threaded shaft, the nut 4 is embedded into one body with protection cover 301, namely the outer wall of nut 4 is fixedly connected with protection cover 301.

[0038] The protection unit 3 is screwed with the shaft end of the output shaft 1 through the nut 4 to fasten the cutting member 2, that is, after the cutting member 2 is installed into the output shaft 1, the protection unit 3 is screwed into the shaft end of the output shaft 1 through the rotation of the protection cover 301, and the axial screwing depth is adjusted as required until the end face of the protection cover 301 close to the side of the grass trimmer abuts against the surface of the cutting member 2.

[0039] The holding member 302 is arranged on the end face of the protection cover 301 away from the cutting member 2, and the operator holds the holding member 302 on the protection cover 301 to rotate the protection cover 301 to realize the fixed cooperation with the shaft end of the output shaft 1.

[0040] The holding member 302 includes the rotating part 11 and the holding part 12, the rotating part 11 is symmetrically arranged on both sides of the holding part 12, specifically, the rotating part 11 is formed by extending from both sides of the holding part 12 towards each other, and a gap is formed in the middle part to avoid the protruding part on the protection cover 301; the rotating part 11 and the holding part 12 are integrally formed, and the whole is shaped like a ring, and the cross-sectional diameter is circular; the axes of the rotating parts 11 on both sides are concentrically arranged, as shown in Figure 6 The holding part 12 is arc-shaped, and the middle part is provided with a protruding part 13 outwardly protruding.

[0041] The end face of the protection cover 301 away from the cutting member 2 is provided with a containing groove 303 containing the holding member 302, and the holding member 302 is rotatably arranged on the protection cover 301 through the rotating part 11 and can be contained in or separated from the containing groove 303 through rotation; specifically, the protection cover 301 is provided with a rotating groove 304 matched with the rotating part 11, the rotating groove 304 is formed by being recessed inwardly from the surface of the protection cover 301, and the groove width is matched with the diameter of the rotating part 11.

[0042] The protection cover 301 is provided with a plurality of limiting members 305 matched with the rotating groove 304 to prevent the holding member 302 from being separated from the rotating groove 304 during rotation, specifically, the limiting member 305 is a plate member which covers the groove opening or partially covers the groove opening when installed, and the limiting member 305 is fixed on the protection cover 301 by a fastener, and a mounting hole matched therewith can be formed on the protection cover 301; a plurality of limiting members 305 can be arranged along the axial direction of the rotating part 11, when the holding member 302 is clamped into the rotating groove 304 through the rotating part 11, the limiting member 305 is then covered on the groove opening of the rotating groove 304 and is fastened by the fastener, thereby preventing the holding member 302 from being separated from the rotating groove 304.

[0043] The accommodating groove 303 comprises a rotating groove 304 matched with the rotating part 11 and an accommodating groove 306 matched with the holding part 12; the rotating groove 304 is connected with the accommodating groove 306; the shape formed after the rotating groove 304 and the accommodating groove 306 are connected is the same as the shape after the rotating part 11 and the holding part 12 are connected; the accommodating groove 306 is symmetrically arranged, the holding part 12 is placed in the accommodating groove 306 after the rotating part 11 rotates on both sides of the holding part 12, and the protruding part 13 is placed outside the protective cover 301.

[0044] The protruding part 13 is provided with a connecting part 16 connected with the holding part 12, the accommodating groove 306 extends to the outer edge of the protective cover 301 to form a connecting groove 307 for accommodating the connecting part 16, and the connecting part 16 is placed in the connecting groove 307 when the holding part 302 is accommodated in the protective cover 301.

[0045] The holding part 12 is made of a magnetically attracted metal, and the bottom of the accommodating groove 306 is provided with a magnet 14 for attracting the holding part 12; the magnet 14 can be provided in multiple numbers, and the protective cover 301 can be further recessed inward at the bottom of the accommodating groove 306 to form a mounting groove for accommodating the magnet 14.

[0046] The side wall of the accommodating groove 306 is provided with a plurality of buckles 15 for limiting the holding part 12 from being separated, the buckle 15 is formed by the inward protrusion of the side wall of the accommodating groove 306, and the protective cover 301 can be made of plastic or rubber.

[0047] The method for using the above-mentioned quickly detachable grass trimmer:

[0048] In use, the cutting part 2 is installed on the shaft end of the output shaft 1, then the protective unit 2 is screwed into the shaft end of the output shaft 1 through the nut 4 to tightly install the cutting part 2, and the protective unit 2 covers the shaft end after being fixed with the output shaft 1 to achieve the protection effect;

[0049] When the protective unit 2 is installed with the output shaft 1, the holding part 12 on the holding part 302 is away from the surface of the protective cover 301 after the rotating part 11 rotates around the rotating groove 304, at this time the operator rotates the protective cover 301 through the holding of the holding part 12 to realize the loosening and tightening between the protective cover 301 and the shaft end of the output shaft 1;

[0050] After the protective unit 2 is tightly installed with the output shaft 1, the holding part 302 is rotated back to the position through the rotating part 11, so that the holding part 12 is hidden in the accommodating groove 306 after being rotated, and the protruding part 13 is placed outside the outer edge of the protective cover 301, which is convenient for the operator to drive the holding part 12 to rotate through the protruding part 13 next time; after the holding part 12 is placed in the accommodating groove 306, the holding part 302 of the protective unit 2 is stably accommodated in the accommodating groove 303 during the use of the grass trimmer through the attraction of the magnet 14.

[0051] The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A quick detachable grass trimmer characterized by: The utility model provides an output shaft (1) and cutting part (2) on the output shaft (1) are arranged, The output shaft (1) is provided with the protective unit (3) of covering the shaft end and being used for fixing the cutting part (2), The protective unit (3) can be detachably arranged at the shaft end of the output shaft (1).

2. A quick detachable grass trimmer according to claim 1, characterized in that: The protective unit (3) includes a protective cover (301) and a holding member (302) movably arranged on the protective cover (301), The holding member (302) can be held by an operator after being moved to drive the protective cover (301) to rotate.

3. A quick detachable grass trimmer according to claim 2, characterized in that: The protective cover (301) is provided with a containing groove (303) for accommodating the holding member (302), and the holding member (302) is movably arranged on the protective cover (301) and accommodated in or separated from the containing groove (303) by rotation.

4. A quick detachable grass trimmer according to claim 3, wherein: The holding member (302) includes a rotating part (11) and a holding part (12), and the protective cover (301) is provided with a rotating groove (304) matched with the rotating part (11).

5. A quick detachable grass trimmer according to claim 4, characterized in that: The protective cover (301) is provided with a plurality of limiting members (305) matched with the rotating groove (304) to prevent the holding member (302) from being separated from the rotating groove (304) during rotation.

6. A quick detachable grass trimmer according to claim 4, wherein: The containing groove (303) includes a rotating groove (304) matched with the rotating part (11) and a receiving groove (306) matched with the holding part (12).

7. A quick detachable grass trimmer according to claim 6, characterized in that: The rotating part (11) is symmetrically arranged and extends inward from both sides of the holding part (12), and the holding part (12) is provided with a protruding part (13); The receiving groove (306) is symmetrically arranged, and the protruding part (13) is arranged outside the protective cover (301) after the holding part (12) is arranged in the receiving groove (306).

8. A quick detachable grass trimmer according to claim 6, characterized in that: The holding part (12) is made of a magnetic metal, and the receiving groove (306) is provided with a magnet (14) for attracting the holding part (12) at the bottom; The receiving groove (306) is provided with a buckle (15) on the side wall of the groove opening to limit the holding part (12) from being separated.

9. A quick detachable grass trimmer according to claim 2, characterized in that: The protective cover (301) is integrally formed, and a nut (4) matched with the output shaft (1) is arranged in the center of the protective cover (301).

10. A quick detachable grass trimmer according to claim 7, characterized in that: The rotating groove (304) and the receiving groove (306) are connected in a penetrating manner; The holding member (302) is integrally formed and has a special-shaped ring shape, and the cross-sectional diameter is circular; The protruding part (13) is provided with a connecting part (16), and the receiving groove (306) extends outward to form a connecting groove (307) for accommodating the connecting part (16); The holding member (302) is arranged on the end face of the protective cover (301) away from the output shaft (1).

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