Disassembly-free quantitative pay-off grass trimmer

Abstract

The utility model discloses a disassembly-free quantitative pay-off grass trimmer which comprises a grass trimmer body and a grass trimming head mechanism detachably arranged at the bottom of the grass trimmer body in a rotating mode. The grass trimming head mechanism comprises an outer shell connected with the grass trimmer body, a knocking head clamped to the bottom of the outer shell, a line wheel assembly fixedly connected to the knocking head and a grass trimming rope wound around the line wheel assembly, the two ends of the grass trimming rope extend out of the outer shell, and a limiting protruding part is formed at the top of the line wheel assembly. A blocking groove for limiting the rotation of the limiting convex part is formed in the outer shell; the grass mowing rope at least comprises a grass mowing state rotating along with the outer shell and a line outgoing state extending out of the outer shell, when the knocking head is clamped to the bottom of the outer shell, the grass mowing rope is in the grass mowing state, and when the knocking head is separated from the outer shell and moves upwards till the limiting protruding part is clamped to the blocking groove, the grass mowing rope is in the line outgoing state. And the grass trimming rope is switched from a line outlet state to a grass trimming state.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, and particularly relates to a lawn mower with detachable and quantitative wire feeding. Background Art

[0002] A lawn mower is a common gardening tool, and its main principle is to drive its grass head to rotate at a high speed by using a motor or an engine. A flexible cutting line is wound around a winding wheel, and the winding wheel is accommodated in the grass head. The end of the flexible cutting line extends out through a hole in the grass head housing. When the grass head rotates at a high speed, the flexible cutting line also rotates at a high speed, so as to realize cutting. When the lawn mower is performing mowing operations, the grass string on the grass head is gradually consumed due to wear. After operating for a period of time, the user needs to replace the new grass string and wind the grass string around the spool.

[0003] For traditional lawn mowers, the user needs to manually rotate the spool to wind the grass string around the spool, which is troublesome to operate, slow in winding speed, and there is also a certain risk because the human hand touches the grass head during the winding process. Therefore, the existing lawn mowers generally adopt a knocking component to wind in and unwind the grass string. However, the existing lawn mowers are prone to continuous wire feeding during the wire feeding process, resulting in the released grass string being too long. Summary of the Utility Model

[0004] In order to solve the technical problems in the background art, the utility model provides a lawn mower with detachable and quantitative wire feeding.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A lawn mower with detachable and quantitative wire feeding includes a lawn mower main body and a grass head mechanism detachably rotated at the bottom of the lawn mower main body;

[0007] The grass head mechanism includes a housing connected to the lawn mower main body, a knocking head clamped at the bottom of the housing, a wire wheel assembly fixedly connected to the knocking head, and a grass string wound around the wire wheel assembly. Both ends of the grass string extend out of the housing respectively. A limiting convex part is formed at the top of the wire wheel assembly, and a blocking groove for restricting the rotation of the limiting convex part is formed on the housing;

[0008] The grass string at least includes a mowing state of rotating with the housing and a wire feeding state of extending out of the housing. When the knocking head is clamped with the bottom of the housing, the grass string is in the mowing state. When the knocking head disengages from the housing and moves upward until the limiting convex part is clamped with the blocking groove, the grass string switches from the wire feeding state to the mowing state.

[0009] Preferably, the blocking grooves are arranged in a circumferential array on the outer housing. A blocking protrusion that is engaged with the limiting protrusion is formed in each blocking groove. When the blocking protrusion slides in the blocking groove until it abuts against the limiting protrusion, the trimming string switches from the wire-out state to the trimming state. Through the above improvements, when wire-out is required, the knocking head can be squeezed downward, so that the knocking head will move upward away from the outer housing. Under the action of centrifugal force, the trimming string starts to extend outward. When the knocking head rises to a certain distance, the blocking protrusion slides in the blocking groove until it abuts against the limiting protrusion, causing the wire wheel assembly to rotate together with the outer housing, so that the trimming string stops wire-out, preventing continuous wire-out during the wire-out process and avoiding releasing an overly long trimming string at one time.

[0010] Preferably, a return spring is arranged between the wire wheel assembly and the outer housing. One end of the return spring abuts against the outer housing, and the other end abuts against the wire wheel assembly, so that the wire wheel assembly always has a tendency to move downward. Through the above improvements, when no force is applied to the knocking head, the knocking head will descend under the action of the return spring and engage with the outer housing, causing the trimming string to rotate with the outer housing for trimming.

[0011] Preferably, a clamping protrusion is formed on the knocking head, and a plurality of clamping grooves arranged in a circumferential array are formed on the outer housing. When the trimming string is in the trimming state, the clamping protrusion is engaged with the clamping groove. Through the above improvements, when the knocking head is in the initial state, the clamping protrusion is placed in the clamping groove and the clamping protrusion abuts against the groove wall of the clamping groove, so that the knocking head rotates synchronously with the outer housing, causing the trimming string to enter the trimming state.

[0012] Preferably, the wire wheel assembly includes a first winding wheel, a second winding wheel, and a wire wheel gland for joining the first winding wheel and the second winding wheel, and a plurality of wire threading channels are formed between the first winding wheel and the second winding wheel. Through the above improvements, it is more convenient for wire threading and more convenient to align with the wire outlet on the outer housing, improving the user's wire threading efficiency.

[0013] Preferably, an indicating groove is formed at the bottom of the outer housing, an indicating arrow is formed on the knocking head, and a wire outlet for the trimming string to extend out is formed on the outer housing. When the indicating groove and the indicating arrow are oppositely arranged, the wire threading channel is oppositely arranged with the wire outlet of the outer housing. Through the above improvements, before wire threading, the knocking head can be rotated to align the indicating arrow on the knocking head with the indicating groove. At this time, the wire threading channel is oppositely arranged with the wire outlet of the outer housing, improving the convenience of the user's wire threading.

[0014] Preferably, a wire protection sleeve is arranged at the wire outlet. Through the above improvements, abrasion of the trimming string is avoided.

[0015] Preferably, the lawn mower body is provided with a rotating shaft for driving the grass cutting head mechanism to rotate. The rotating shaft is threadedly connected to the outer housing. A sliding channel is formed on the lawn mower body. A clamping plate is slidably arranged in the sliding channel. An elastic element is arranged in the sliding channel. One end of the elastic element abuts against the sliding channel, and the other end abuts against the clamping plate. A clamping area for clamping the rotating shaft and a rotating area for the rotating shaft to rotate are formed on the clamping plate. A clamping section is formed at the top of the rotating shaft. The clamping plate slides so that the clamping section is placed in the clamping area and the rotation of the rotating shaft is restricted. Through the above improvement, when it is necessary to disassemble the grass cutting head mechanism, the clamping plate can be pushed so that the clamping section of the rotating shaft is placed in the clamping area, and thus the entire grass cutting head mechanism can be disassembled.

[0016] Preferably, cutting channels are arranged on both sides of the wire protecting sleeve. A cutting knife is slidably arranged in the cutting channels. A return spring is arranged in the cutting channels. One end of the return spring abuts against the cutting channel, and the other end abuts against the cutting knife, so that the cutting knife has a tendency to move away from the wire outlet. Through the above improvement, when the grass string has been worn to a certain extent, the cutting knives on both sides can be pressed to cut off the worn grass string, and a new grass string of an appropriate length can be released again through the knocking head.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] By movably clamping the knocking head at the bottom of the outer housing and fixedly connecting the wire wheel assembly to the knocking head, the wire wheel assembly rotates synchronously with the knocking head. When the knocking head is knocked, the knocking head will move upward and disengage from the outer housing. The grass string wound around the wire wheel assembly will be released outside the outer housing under the action of centrifugal force. And during the process that the knocking head disengages from the outer housing and moves upward, continuous wire release is carried out until the limiting convex part at the top of the wire wheel assembly is clamped with the blocking groove at the top of the outer housing, so that the wire wheel assembly continues to rotate with the outer housing, thereby ensuring that only a certain amount of grass string is released each time the knocking head is knocked, and the situation of continuous wire release will not occur, which is more convenient for the user to adjust the length of the grass string extending out. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the overall structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the lawn mower body of the utility model;

[0021] Figure 3 It is a schematic structural diagram of the grass cutting head mechanism of the utility model;

[0022] Figure 4 It is an exploded view of the grass cutting head mechanism of the utility model;

[0023] Figure 5 Structural schematic diagram of the top of the outer shell of the present utility model;

[0024] Figure 6 Structural schematic diagram of the cooperation between the outer shell of the present utility model and the striking head;

[0025] Figure 7 Structural schematic diagram of the striking head of the present utility model;

[0026] Figure 8 Structural schematic diagram of the wire wheel assembly of the present utility model;

[0027] Figure 9 Structural schematic diagram of the installation of the trimming rope of the present utility model;

[0028] Figure 10 Cross-sectional view of the installation of the trimming rope of the present utility model;

[0029] Figure 11 Structural schematic diagram of the wire protection sleeve and the trimming rope of the present utility model;

[0030] Figure 12 Cross-sectional view of the implementation manner of the cutting knife of the present utility model;

[0031] In the figure: 1, lawn mower main body; 2, lawn mowing head mechanism; 101, outer shell; 102, striking head; 103, wire wheel assembly; 104, trimming rope; 105, limiting convex portion; 106, blocking groove; 107, blocking convex portion; 108, return spring; 109, clamping convex portion; 110, clamping groove; 201, first wire wheel; 202, second wire wheel; 203, wire wheel gland; 204, threading channel; 205, indicating groove; 206, indicating arrow; 207, wire outlet; 208, wire protection sleeve; 301, rotating shaft; 302, clamping plate; 303, sliding channel; 304, elastic element; 305, clamping area; 306, rotating area; 307, clamping section; 401, cutting channel; 402, cutting knife; 403, retracting spring; 404, rotating groove; Specific implementation manner

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be understood that although terms such as upper, middle, lower, top, one end, etc. appear in this text to describe various components, these components are not limited by these terms. These terms are only used to distinguish components from each other for easy understanding, rather than to define any directional or sequential limitations.

[0034] As Figures 1-12 shown, a non-disassembling quantitative wire-releasing lawn mower includes a lawn mower main body 1, and a lawn mower head mechanism 2 detachably mounted at the bottom of the lawn mower main body 1. The lawn mower main body 1 drives the lawn mower head mechanism 2 to rotate forward or backward.

[0035] Specifically, the lawn mower head mechanism 2 includes a housing 101 connected to the lawn mower main body 1, a striking head 102 clamped at the bottom of the housing 101, a wire wheel assembly 103 fixedly connected to the striking head 102, and a lawn mowing rope 104 wound around the wire wheel assembly 103. Both ends of the lawn mowing rope 104 extend out of the housing 101 respectively. The top of the wire wheel assembly 103 forms a limiting convex portion 105, and a blocking groove 106 for restricting the rotation of the limiting convex portion 105 is formed on the housing 101.

[0036] Furthermore, the lawn mowing rope 104 at least includes a lawn mowing state of rotating with the housing 101 and a wire-releasing state of extending out of the housing 101. When the striking head 102 is clamped to the bottom of the housing 101, the lawn mowing rope 104 is in the lawn mowing state. When the striking head 102 disengages from the housing 101 and moves upward until the limiting convex portion 105 of the wire wheel assembly 103 is clamped to the blocking groove 106 of the housing 101, the lawn mowing rope 104 switches from the wire-releasing state to the lawn mowing state.

[0037] By movably clamping the striking head 102 to the bottom of the housing 101 and fixedly connecting the wire wheel assembly 103 to the striking head 102, the wire wheel assembly 103 rotates synchronously with the striking head 102. When wire releasing is required, the striking head 102 will move upward and break away from the restriction of the housing 101. The lawn mowing rope 104 wound around the wire wheel assembly 103 will be released outside the housing 101 under the action of centrifugal force, and continuous wire releasing will occur during the process that the striking head 102 breaks away from the housing 101 and moves upward until the limiting convex portion 105 at the top of the wire wheel assembly 103 is clamped to the blocking groove 106 at the top of the housing 101, enabling the wire wheel assembly 103 to continue rotating with the housing 101, thus ensuring that only a certain amount of the lawn mowing rope 104 will be released each time the striking head 102 is struck, and continuous wire releasing will not occur, which is more convenient for the user to adjust the length of the lawn mowing rope 104 extending out.

[0038] As Figures 3 to 10As shown in the figure, for a further explanation of the cooperation between the blocking groove 106 and the blocking protrusion 107 in this embodiment, the blocking grooves 106 are arranged in a circumferential array on the outer housing 101. A blocking protrusion 107 that is engaged with the limiting protrusion 105 is formed in the blocking groove 106. The blocking protrusion 107 slides in the blocking groove 106 until it abuts against the limiting protrusion 105, so that the trimming line 104 is switched from the wire outlet state to the trimming state.

[0039] When wire release is required, the knocking head 102 can be squeezed downward, so that the knocking head 102 will move upward away from the outer housing 101. The trimming line 104 starts to extend outward under the action of centrifugal force. When the knocking head 102 rises to a certain distance, the blocking protrusion 107 slides in the blocking groove 106 until it abuts against the limiting protrusion 105, causing the wire wheel assembly 103 to rotate together with the outer housing 101, so that the trimming line 104 stops wire release, preventing continuous wire release during the wire release process and avoiding releasing an overly long trimming line 104 at one time.

[0040] As Figures 3 to 10 shown, for a further explanation of the reset implementation method of the knocking head 102 in this embodiment, a reset spring 108 is arranged between the wire wheel assembly 103 and the outer housing 101. One end of the reset spring 108 abuts against the outer housing 101, and the other end abuts against the wire wheel assembly 103, so that the wire wheel assembly 103 always has a tendency to move downward.

[0041] When no force is applied to the knocking head 102, the knocking head 102 will descend under the action of the reset spring 108 and be engaged with the outer housing 101, causing the trimming line 104 to rotate with the outer housing 101 for trimming, thereby realizing quantitative wire release.

[0042] For a further explanation of the cooperation between the knocking head 102 and the outer housing 101 in this embodiment, a clamping protrusion 109 is formed on the knocking head 102, and a plurality of clamping grooves 110 arranged in a circumferential array are formed on the housing. When the trimming line 104 is in the trimming state, the clamping protrusion 109 is engaged with the clamping groove 110.

[0043] When the knocking head 102 is in the initial state, the clamping protrusion 109 is placed in the clamping groove 110, and the clamping protrusion 109 abuts against the groove wall of the clamping groove 110, so that the knocking head 102 rotates synchronously with the outer housing 101, causing the trimming line 104 to enter the trimming state.

[0044] In addition, when the trimming line 104 needs to be wound up, the knocking head 102 can be manually rotated within the outer housing 101 while the outer housing 101 does not rotate, so that the trimming line 104 is wound up on the wire wheel assembly 103.

[0045] Preferably, a rotation groove 404 for hand gripping is formed on the circumferential side of the striking head 102.

[0046] As Figures 3 to 10 shown, for a further explanation of the implementation manner of the wire wheel assembly 103 in this embodiment, the wire wheel assembly 103 includes a first wire winding wheel 201 and a second wire winding wheel 202, and a wire wheel gland 203 for joining the first wire winding wheel 201 and the second wire winding wheel 202, and a plurality of wire threading channels 204 are formed between the first wire winding wheel 201 and the second wire winding wheel 202.

[0047] Among them, the wire threading channels 204 are arranged in a circumferential array on the wire wheel assembly 103, so that wire threading can be carried out through a plurality of wire threading channels 204. Through the above improvements, it is more convenient for wire threading and more convenient to align with the wire outlet 207 on the outer housing 101, improving the wire threading efficiency of users.

[0048] In addition, an indication groove 205 is formed at the bottom of the outer housing 101, an indication arrow 206 is formed on the striking head 102, and a wire outlet 207 for the grass trimming rope 104 to extend out is formed on the outer housing 101. When the indication groove 205 and the indication arrow 206 are arranged opposite to each other, the wire threading channel 204 and the wire outlet 207 of the outer housing 101 are arranged opposite to each other. Before wire threading, the striking head 102 can be rotated to align the indication arrow 206 on the striking head 102 with the indication groove 205. At this time, the wire threading channel 204 and the wire outlet 207 of the outer housing 101 are arranged opposite to each other, improving the convenience of wire threading for users.

[0049] As Figures 1 to 2 shown, for a further explanation of the cooperation between the lawn mower main body 1 and the grass trimming head mechanism 2 in this embodiment, the lawn mower main body 1 is provided with a rotating shaft 301 for driving the grass trimming head mechanism 2 to rotate. The rotating shaft 301 is threadedly connected to the outer housing 101, and a clamping plate 302 is slidably arranged on the lawn mower main body 1. The clamping plate 302 is clamped to the rotating shaft 301 to limit the rotation of the rotating shaft 301.

[0050] During use, the rotation of the rotating shaft 301 can be restricted by using the clamping plate 302, so as to disassemble the entire grass trimming head mechanism 2, improving the convenience of users during use.

[0051] Specifically, a sliding channel 303 is formed on the lawn mower main body 1. The clamping plate 302 is slidably arranged in the sliding channel 303. An elastic element 304 is arranged in the sliding channel 303. One end of the elastic element 304 abuts against the sliding channel 303, and the other end abuts against the clamping plate 302. A clamping area 305 for clamping the rotating shaft 301 and a rotating area 306 for the rotating shaft 301 to rotate are formed on the clamping plate 302. A clamping section 307 is formed at the top of the rotating shaft 301. The clamping plate 302 slides to place the clamping section 307 in the clamping area 305 and restricts the rotation of the rotating shaft 301.

[0052] When it is necessary to disassemble the grass cutting head mechanism 2, the clamping plate 302 can be pushed so that the clamping section 307 of the rotating shaft 301 is placed into the clamping area 305, so that the entire grass cutting head mechanism 2 can be disassembled.

[0053] Such as Figures 11 to 12 As shown, in some other embodiments, a wire protection sleeve 208 is provided at the wire outlet 207 to avoid abrasion of the grass trimming rope 104. Among them, the wire protection sleeve 208 is made of aluminum material.

[0054] Preferably, cutting channels 401 are provided on both sides of the wire protection sleeve 208. A cutting knife 402 is slidably arranged in the cutting channels 401, and a return spring 403 is arranged in the cutting channels 401. One end of the return spring 403 abuts against the cutting channel 401, and the other end abuts against the cutting knife 402, so that the cutting knife 402 has a tendency to move away from the wire outlet 207.

[0055] During daily use, when the grass trimming rope 104 has been worn to a certain extent, the worn grass trimming rope 104 can be cut off by pressing the cutting knives 402 on both sides, and an appropriate length of new grass trimming rope 104 can be released again through the knocking head 102.

[0056] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A non-disassembly quantitative line-laying grass trimmer, characterized in that: It comprises a grass trimmer body (1), and a grass trimmer head mechanism (2) which is detachably mounted on the bottom of the grass trimmer body (1); The grass trimming head mechanism (2) comprises an outer shell (101) connected to the grass trimmer body (1), a striking head (102) clamped on the bottom of the outer shell (101), a wire wheel assembly (103) fixedly connected to the striking head (102), and a grass trimming rope (104) wound around the wire wheel assembly (103), the two ends of the grass trimming rope (104) respectively extending out of the outer shell (101), the top of the wire wheel assembly (103) forming a limiting convex portion (105), and the outer shell (101) is formed with a blocking groove (106) for limiting the rotation of the limiting convex portion (105); The grass cutting rope (104) at least includes a grass cutting state rotating with the outer shell (101) and a line-out state extending toward the outside of the outer shell (101); when the striking head (102) is engaged with the bottom of the outer shell (101), the grass cutting rope (104) is in the grass cutting state; when the striking head (102) is separated from the outer shell (101) and moves upward until the limiting protrusion (105) is engaged with the blocking groove (106), the grass cutting rope (104) switches from the line-out state to the grass cutting state.

2. The non-disassembly quantitative laying grass trimmer according to claim 1, characterized in that: The blocking grooves (106) are arranged in a circumferential array on the outer shell (101), and a blocking convex portion (107) is formed in the blocking groove (106) to be engaged with the limiting convex portion (105). When the blocking convex portion (107) slides in the blocking groove (106) until it abuts against the limiting convex portion (105), the grass cutting rope (104) switches from the line output state to the grass cutting state.

3. The non-disassembly quantitative line-laying grass trimmer according to claim 1, characterized in that: A return spring (108) is provided between the wire wheel assembly (103) and the outer shell (101); one end of the return spring (108) abuts against the outer shell (101), and the other end abuts against the wire wheel assembly (103), so that the wire wheel assembly (103) always has a tendency to move downward.

4. The non-disassembly quantitative line-laying grass trimmer according to claim 1, characterized in that: The striking head (102) is formed with a snap-fitting protrusion (109), the outer shell (101) is formed with a plurality of snap-fitting grooves (110) arranged in a circumferential array, and when the mowing rope (104) is in a mowing state, the snap-fitting protrusion (109) is snap-fitted with the snap-fitting grooves (110).

5. The non-disassembly quantitative line-laying grass trimmer according to claim 1, characterized in that: The reel assembly (103) comprises a first winding wheel (201) and a second winding wheel (202), and a reel pressure cover (203) for connecting the first winding wheel (201) and the second winding wheel (202), and a plurality of threading channels (204) are formed between the first winding wheel (201) and the second winding wheel (202).

6. The non-disassembly quantitative line-laying grass trimmer according to claim 5, characterized in that: The bottom of the outer shell (101) is formed with an indication groove (205), the striking head (102) is formed with an indication arrow (206), and the outer shell (101) is formed with a wire outlet (207) for the grass cutting rope (104) to extend out, and when the indication groove (205) and the indication arrow (206) are arranged opposite to each other, the threading channel (204) and the wire outlet (207) of the outer shell (101) are arranged opposite to each other.

7. The non-disassembly quantitative line-laying grass trimmer according to claim 6, characterized in that: The wire outlet (207) is provided with a wire protection sleeve (208).

8. The non-disassembly quantitative line-laying grass trimmer according to claim 1, characterized in that: The mower body (1) is provided with a rotating shaft (301) for driving the mowing head mechanism (2) to rotate, the rotating shaft (301) being threadedly connected to the outer shell (101), and a clamping plate (302) is slidably provided on the mower body (1), the clamping plate (302) being clamped with the rotating shaft (301) to limit the rotation of the rotating shaft (301).

9. The non-disassembly quantitative laying-out grass trimmer according to claim 8, characterized in that: The grass trimmer body (1) is formed with a sliding channel (303), the clamping plate (302) is slidably arranged in the sliding channel (303), an elastic element (304) is arranged in the sliding channel (303), one end of the elastic element (304) abuts against the sliding channel (303), and the other end abuts against the clamping plate (302), the clamping plate (302) is formed with a clamping area (305) for clamping the rotating shaft (301) and a rotation area (306) for the rotating shaft (301) to rotate, the top of the rotating shaft (301) is formed with a clamping section (307), the clamping plate (302) slides so that the clamping section (307) is placed in the clamping area (305), and the rotation of the rotating shaft (301) is restricted.

10. The non-disassembly quantitative line-laying grass trimmer according to claim 7, characterized in that: Cutting channels (401) are arranged on both sides of the wire protection sleeve (208), a cutting knife (402) is slidably arranged in the cutting channel (401), a return spring (403) is arranged in the cutting channel (401), one end of the return spring (403) abuts against the cutting channel (401), and the other end abuts against the cutting knife (402), so that the cutting knife (402) has a tendency to move away from the wire outlet (207).

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