CN203985053U - Mower guard and mower - Google Patents

Abstract

The utility model provides a kind of mower guard and mower, described mowing tool has casing and blade assembly, described blade assembly is located at the below, bottom surface of casing, described mower guard comprises the some protectors of projection in casing bottom surface, described protector is trapped among blade assembly around, is connected and has spacing between two protectors.Around being positioned at blade assembly in mower housing bottom surface, protector is set, has changed the larger problem in gap between mower housing bottom surface and ground in the past, when mower is mowed simultaneously, rib has elicitation effect to grass, can greatly reduce to drive resistance.

Description

Lawn mower guards and lawn mowers

technical field

The utility model relates to a protection device for a lawn trimmer, in particular to a rotary blade cutter for an automatic, self-guided and self-supporting lawn trimmer and the lawn mower.

Background technique

In an automatic lawn trimmer, a motor-driven blade rotates about a generally vertical axis. Traditional rotary lawn trimmers require protective structures around the blades to prevent injury to the user or others approaching the trimmer during operation . As shown in Figures 1 and 2, the existing protective structure is a fence-type cover structure formed by a number of connecting bars I03 that is placed outside the blade assembly 02 at the bottom of the trimmer casing 01, and the connecting bars I03 are in the The top is connected by the connecting bar Ⅱ04. The inevitable problems of this protective structure are: 1. The trimmer has a large resistance when it is working, and the automatic trimmer needs to provide greater power; 2. The protection range of the fence-type cover structure Limited, when the operator or children are playing, their arms, arms, fingers, etc. can easily extend into the fence-type cover from the gap between the casing 01 and the ground and be cut by the blade. The fence-type cover structure has greater safety Hidden dangers; 3. The fence-type cover structure is adopted. Due to the long length of the connecting strip, the middle is suspended in the air and only fixed at both ends. When mowing the grass, the connecting strip is easy to break due to the large resistance or when the cover touches the ground; 4. The The fence-type cover structure is installed on the casing 01 by fasteners such as bolts, which is time-consuming and labor-intensive, and the labor cost is high.

Contents of the invention

The technical problem to be solved by the utility model is to provide a lawnmower protection device and a lawnmower, by setting a raised protective piece around the blade assembly on the bottom surface of the lawnmower casing, changing the previous lawnmower casing The large gap between the bottom surface and the ground can prevent fingers from getting close to the blade. At the same time, when the lawn mower mows, the ribs have a dredging effect on the grass, which can greatly reduce the driving resistance.

In order to solve the above-mentioned existing technical problems, the utility model adopts the following scheme: a lawnmower protection device, the lawnmower has a casing and a blade assembly, the blade assembly is exposed below the bottom surface of the casing, and the mower The machine guard includes several guards protruding from the bottom surface of the casing, the guards surround the blade assembly, and there is a gap between two connected guards.

Preferably, the protective member and the casing are integrally formed as an integral structure. The integrated structure is easy to manufacture, does not need to be installed, has good strength and is not easy to be damaged.

Preferably, the protective member is a long sheet-shaped rib, and the extending direction of the rib is consistent with the traveling direction of the lawn mower when it is working. By setting the strip-shaped ribs around the blade assembly on the bottom surface of the lawn mower casing, the extension direction of the strip-shaped ribs is set to be consistent with the direction of travel of the lawn mower, which changes the bottom surface of the previous lawn mower casing. There is a large gap between the lawn mower and the ground, and the body parts such as the arms and fingers of the operator or the child are easy to reach into the gap between the bottom surface of the lawn mower casing and the ground and touch the cutter head assembly; due to the long ribs The extension direction is set to be consistent with the moving direction of the lawnmower. When mowing, when the lawnmower passes the grass to be cut, the ribs have a dredging effect on the grass and will not press the grass; The protection is set without using a protection device that completely covers the blade assembly, and the driving resistance of the lawn mower can be greatly reduced.

Preferably, in the direction in which the rib extends from the end away from the blade assembly to the blade assembly, the distance from the bottom surface I of the end of the rib away from the blade assembly to the bottom surface of the casing gradually increases. The rib forms a wedge-shaped tip at an end away from the blade assembly, and when the mower is mowing, this end faces the cut grass, which helps to further reduce resistance and make it easier to guide the grass.

Preferably, the bottom surface I is a curved surface, and the streamlined design of the curved surface has a better dredging effect.

As a preference, the casing is equipped with a cutterhead frame exposed below the bottom surface of the casing, the blade assembly includes a cutterhead mounted on the cutterhead frame and a blade mounted on the cutterhead, the mower The protection device also includes several protective posts arranged at the bottom of the cutter head frame, and the protective posts surround the cutter head. The protective column on the cutter head has a protective effect on the cutter head and the blade.

Preferably, the protective column and the cutter head frame are integrally formed as an integral structure.

Preferably, the cutter head frame has a reinforcing connecting piece connected to the side of the protective column. When mowing the grass, the protective post will not break off easily.

Preferably, the protective elements are several protective pillars arranged on the bottom surface of the casing. The protective piece is arranged as a protective column, which can also prevent the arm or finger from extending in.

Preferably, the protection columns are arranged in rows, and the extension direction of each row of protection columns is consistent with the traveling direction of the mower when it is working.

At the same time, the utility model also provides a lawnmower, which has the above-mentioned protection device for the lawnmower. When the mower is in working condition or placed on the bottom with the bottom facing, the maximum distance from the bottom of the guard to the ground shall be within 38.5mm, and the maximum distance between two adjacent guards shall be controlled within 38.5mm. The two sides of the assembly in the direction of travel of the lawn mower are the front and rear sides, and the other two sides are the left and right sides. The bottom surface of the guard on the left and right sides of the blade assembly is preferably lower than the height of the blade assembly. Among the guards on the front and rear sides of the blade assembly, at least some of the guards should be distributed outside the range of 80mm from the blade assembly.

Beneficial effect:

The utility model adopts the lawn mower protective device and the lawn mower provided by the above-mentioned technical scheme. By arranging several protective parts around the blade assembly on the bottom surface of the lawn mower shell, the gap between the bottom surface of the lawn mower shell and the ground is changed. At the same time, when the lawn mower mows, the ribs have a dredging effect on the grass, which can greatly reduce the driving resistance.

Description of drawings

Fig. 1 is an existing mower with a protective structure;

Fig. 2 is the local structure schematic diagram of the protective structure of existing mower;

Fig. 3 is a schematic structural view of Embodiment 1 of the utility model;

Fig. 4 is the structural representation of the utility model blade assembly;

Fig. 5 is a partial structural schematic diagram of the lawnmower in the second embodiment of the utility model;

Fig. 6 is a structural schematic diagram of replacing part of the ribs with protective columns in the third embodiment of the utility model;

Fig. 7 is a structural schematic diagram of replacing all ribs with protective columns in Embodiment 3 of the utility model.

Detailed ways

Embodiment one:

As shown in Figures 3 and 4, it is an embodiment of a lawnmower protective device, wherein the lawnmower has a casing 1 and is installed on the casing 1 and is exposed to the cutterhead frame 21 of the bottom surface of the casing 1, the cutterhead frame The bottom of 21 is provided with cutterhead 22, and the edge of cutterhead 22 is equipped with three evenly arranged blades 23, and drive motor is installed on the cutterhead frame 21, and the output end of drive motor is connected with cutterhead 22 and drives cutterhead to rotate, cuts The grass machine protective device comprises some long lamellar tendons 3 arranged on the bottom surface of the casing 1 and some protective posts 4 arranged on the bottom surface of the cutter head frame 21; The direction is roughly perpendicular to the bottom surface of the casing 1, the ribs 3 surround the cutter head frame 21, and the protective columns 4 surround the cutter head 22. There is a space between each rib 3, and there is a space between two adjacent protective columns 4. The rib 3 and the casing 1 are an integral structure, and the protective column 4 and the cutter head frame 21 are an integral structure. The bottom surface of the rib 3 has a bottom surface I31 and a bottom surface II32, the bottom surface I31 is far away from the cutter head frame 21 and the cutter head frame 22, the bottom surface II32 is close to the cutter head frame 21 and the cutter head frame 22, the bottom surface I31 is an arc surface, and the bottom surface I31 is far away from the cutter head frame 21 and the cutter head frame 22. One end of the cutterhead 22 is directly connected to the bottom surface of the casing 1, and one end close to the cutterhead frame 21 and the cutterhead 22 is connected to the bottom surface II32, and the bottom surface I31 and the bottom surface II32, and the bottom surface I31 and the two sides of the ribs transition smoothly; The distance from the bottom surface of the shell 1 gradually increases from zero to the end connected to the bottom surface II32 of the rib from the end connected to the bottom surface of the casing 1 to form an arc surface, which helps to reduce the resistance of the end of the rib when the lawn mower is working. . The cutter head frame 21 has a reinforcing connecting piece 211 connected to the side of the protective column 4 , and the reinforcing connecting piece 211 has a strengthening and fixing effect on the protective column 4 .

Embodiment two:

As shown in Figures 3 to 5, it is an embodiment of a lawn mower. The lawn mower has a casing 1 and a cutter head frame 21 that is installed on the casing 1 and exposed to the bottom of the casing 1. The bottom surface of the casing 1 There is a circular groove 11, the center of the circular groove 11 has a hole 12, the top of the cutter frame 21 has a cylinder 212, the cutter frame 21 is set in the circular groove 11, and the cylinder 212 extends into the hole 12 and connects with the casing 1 Sliding fit, the outer wall of the cylinder 212 is provided with a slider 213, and the inner wall of the hole 12 is provided with a chute 121 that is slidably matched with the slider 213, so that the cutter head frame 21 can slide up and down relative to the casing 1, and the cylinder 212 A motor is installed inside, and a cutterhead 22 is installed on the output end of the motor. Three evenly distributed blades 23 are installed on the edge of the cutterhead 22. The cutterhead 22 and the blades 23 are all located under the cutterhead frame 21. The cutterhead 22 is driven by a Drive and rotate to mow, when the cutter head frame 21 adjusts the height up and down, the cutter head 22 and the blade 23 also move up and down to adjust the mowing height. Two universal wheels 5 are arranged on both sides in front of the bottom of the casing 1, and two toothed wheels 6 driven by a power mechanism are arranged on both sides in the rear. This lawn mower has a lawn mower protection device, and this lawn mower protection device includes some elongated ribs 3 arranged on the bottom surface of the casing 1 and some protective columns 4 arranged on the bottom surface of the cutter head frame 21; The length direction is roughly consistent with the direction of travel of the lawnmower when mowing, the width direction is roughly perpendicular to the bottom surface of the casing 1, the ribs 3 surround the blade assembly, the protective column 4 surrounds the cutter head 22, and the ribs 3 The extending direction is consistent with the traveling direction of the mower, and there is a distance between two adjacent ribs 3 . The rib 3 and the casing 1 are integrally formed in one structure. The bottom surface of the rib 3 is composed of the bottom surface I31 and the bottom surface II32, the bottom surface I31 is far away from the cutter head frame 21 and the cutter head frame 22, the bottom surface II32 is close to the cutter head frame 21 and the cutter head frame 22, the bottom surface I31 is an arc surface, and the bottom surface I31 is far away from the cutter head frame 21 One end is directly connected to the bottom surface of the casing 1, one end close to the cutter head frame 21 is connected to the bottom surface II32, the bottom surface I31 and the bottom surface II32, and the bottom surface I31 and the two sides of the ribs transition smoothly, and the distance from the bottom surface I31 to the bottom surface of the casing 1 is from The end connected to the bottom surface of the casing 1 gradually increases from zero to the end connected to the bottom surface II32 of the rib. The protective column 4 and the cutter head frame 21 are integrally formed in one structure. The cutter head frame 21 has a reinforcing connecting piece 211 connected to the side of the protective column 4 , and the reinforcing connecting piece 211 has a strengthening and fixing effect on the protective column 4 .

Embodiment three:

As shown in Figures 6 and 7, the difference from Embodiment 1 is that part or all of the ribs 3 on the bottom surface of the casing 1 are replaced by several protective columns 4 arranged in rows, and the arrangement of each row of protective columns 4 The direction is consistent with the direction of travel when the lawnmower is working, and there is a certain distance between two adjacent rows of protective columns 4 .

Embodiment four:

A lawnmower, the lawnmower has a casing 1 and a blade assembly, the blade assembly is exposed below the bottom surface of the casing 1, and the lawnmower protection device of the lawnmower adopts the lawnmower protection device described in the third embodiment.

Claims (10)

1. Lawnmower protective device, described lawnmower has casing (1) and blade assembly, and described blade assembly is exposed below the bottom surface of casing (1), it is characterized in that: described lawnmower protective device comprises A plurality of protective pieces protrude from the bottom surface of the casing (1), the protective pieces surround the blade assembly, and there is a distance between two connected protective pieces. 2. The protection device for a lawn mower according to claim 1, characterized in that: the protection member and the casing (1) are integrally formed in one structure. 3. The lawnmower protective device according to claim 1 or 2, characterized in that: the protective piece is a long sheet-shaped rib (3), and the extending direction of the rib (3) is in line with the working direction of the mower. The direction of travel is the same. 4. The protection device for lawnmower according to claim 3, characterized in that: in the direction in which the rib (3) extends from the end away from the blade assembly to the position of the blade assembly, the rib (3) is far away from the blade The distance from the bottom surface I (31) at one end of the assembly to the bottom surface of the casing (1) increases gradually. 5. The lawn mower protective device according to claim 1 or 2, characterized in that: the casing (1) is equipped with a cutter head frame (21) exposed below the bottom surface of the casing (1), the The blade assembly comprises a cutterhead (22) installed on the cutterhead frame (21) below the cutterhead frame (21) and a blade (23) installed on the cutterhead (22), and the lawnmower protection device also includes Several protective posts (4) are arranged at the bottom of the cutter head frame (21), and the cutter head (22) and blades (23) are surrounded by the middle of the protective posts (4). 6. The protective device for a lawnmower according to claim 5, characterized in that: the protective post (4) and the cutter head frame (21) are integrally formed in one structure. 7. The protective device for a lawnmower according to claim 5, characterized in that: the cutter head frame (21) has a reinforcing connecting piece (211) connected to the side of the protective column (4). 8. The protective device for lawn mowers according to claim 1 or 2, characterized in that: the protective parts are several protective columns (4) arranged on the bottom surface of the casing (1). 9. The protective device for lawn mowers according to claim 8, characterized in that: the protective columns (4) are arranged in rows, and the extension direction of each row of protective columns (4) is consistent with the traveling direction of the lawn mower when it is working . 10. A lawnmower, characterized in that the lawnmower has the lawnmower protection device according to any one of claims 1 to 9.