Lawn mower cutting device with sealing mechanism

Abstract

The utility model relates to a lawnmower cutting device with a sealing mechanism. The lawnmower cutting device comprises a driving box body, the sealing mechanism and a shearing mechanism installed at the front end of the driving box body. The shearing mechanism comprises a movable blade and a fixed blade which are connected through a connecting pin; the driving box body comprises a base, a top cover and a transmission assembly, and a mounting chamber is formed between the base and the top cover; an arrangement groove for arranging the shearing mechanism is formed in one side, facing the shearing mechanism, of the top cover; the sealing mechanism comprises a sealing block arranged on the top of the movable blade and a sealing gasket arranged between the movable blade and the fixed blade. The grass mower has the effect of preventing grass clippings from entering the driving box body to interfere with normal operation of the grass mower.

Description

Technical Field

[0001] This application relates to the field of garden machinery and equipment, and in particular to a lawnmower cutting device with a sealing mechanism. Background Technology

[0002] A lawnmower is a device used to trim lawns and vegetation, which includes a cutting device and a drive motor for driving the cutting device.

[0003] The lawnmower cutting device includes a drive housing and a cutting mechanism mounted on the front end of the drive housing. The cutting mechanism includes a movable blade and a fixed blade connected by a connecting pin. A transmission assembly is arranged inside the drive housing, and a groove is formed at the leading edge of the transmission assembly for the movable blade to rotate left and right. When the lawnmower is working, driven by the transmission assembly, the movable blade rotates around the connecting pin and interacts with the fixed blade to generate a cutting force, thereby cutting the weeds.

[0004] Regarding the aforementioned technologies, the inventors believe that during the use of a lawnmower, grass clippings can easily enter the drive housing from the moving slot, interfering with the normal operation of the lawnmower and causing damage to it. Utility Model Content

[0005] To prevent grass clippings from entering the drive housing and interfering with the normal operation of the lawnmower, this application provides a lawnmower cutting device with a sealing mechanism.

[0006] The lawnmower cutting device with a sealing mechanism provided in this application adopts the following technical solution:

[0007] A lawnmower cutting device with a sealing mechanism includes a drive housing, a sealing mechanism, and a cutting mechanism mounted on the front end of the drive housing. The cutting mechanism includes a movable blade and a fixed blade connected by a connecting pin. The drive housing includes a base, a top cover, and a transmission assembly, with an installation chamber formed between the base and the top cover. The top cover has an arrangement groove for arranging the cutting mechanism on the side facing the cutting mechanism. The sealing mechanism includes a sealing block arranged on the top of the movable blade and a sealing gasket arranged between the movable blade and the fixed blade.

[0008] By adopting the above technical solution, a sealing block is placed on the top of the movable blade and a sealing gasket is placed between the movable blade and the fixed blade, which helps to enhance the sealing of the connection between the drive box and the shearing mechanism, so that when the lawnmower is working, grass clippings are less likely to enter the drive box from the top of the movable blade and the gap between the movable blade and the fixed blade.

[0009] Optionally, the arrangement slot includes a movable slot for the movable blade to rotate left and right and a fixed slot for the fixed blade to be arranged, wherein the length of the fixed slot is greater than the length of the movable slot.

[0010] By adopting the above technical solution, the specific structure of the arrangement slot is disclosed. By arranging a movable slot and a fixed slot at the front end of the drive box, and making the length of the fixed slot greater than the length of the movable slot, it is easier to better fix the fixed blade while the movable blade rotates left and right.

[0011] Optionally, the sealing gasket is longer than the length of the movable groove and covers the lower part of the opening of the movable groove.

[0012] By adopting the above technical solution, the length of the sealing gasket is greater than the length of the movable groove and covers the lower part of the opening of the movable groove, making it difficult for grass clippings to enter between the movable blades from the movable groove, thereby improving the sealing performance of the drive box.

[0013] Optionally, the top cover has a mounting groove for arranging the sealing block, the sealing block being a sponge sealing block, the length of the sealing block being greater than the length of the movable groove, and the bottom surface of the sealing block always tending to abut against the top surface of the sealing gasket.

[0014] By adopting the above technical solution, the sponge sealing block has a certain elasticity and always tends to abut against the sealing gasket, making the fit between the sealing block and the movable blade, as well as between the sealing block and the sealing gasket, tighter; the length of the sealing block is greater than the length of the movable groove, which helps to prevent grass clippings from entering the drive box from the movable groove, thereby further improving the sealing performance of the drive box.

[0015] Optionally, the thickness of the sealing gasket gradually decreases along the direction close to the arrangement groove.

[0016] By adopting the above technical solution, the thickness of the sealing gasket gradually decreases along the direction close to the arrangement groove, so that the tail end of the movable blade is slightly raised and forms a certain angle with the fixed blade, which helps to improve the shearing force of the cutting device.

[0017] Optionally, the sealing gasket has an outwardly convex arcuate surface on the side facing the movable groove.

[0018] By adopting the above technical solution, an outwardly protruding arc-shaped surface is provided on the side of the sealing gasket facing the movable groove, making it difficult for grass clippings to remain in the movable groove, which helps to further improve the sealing performance of the drive box and thus prevents grass clippings from entering the interior of the drive box.

[0019] Optionally, the sealing gasket has mounting protrusions arranged on its surface facing the fixing blade, and the fixing blade has mounting holes for arranging the mounting protrusions; the surface of the sealing gasket has arrangement holes for arranging the connecting pins.

[0020] By adopting the above technical solution, mounting protrusions are arranged at the bottom of the sealing gasket, and mounting holes for mounting protrusions are opened on the surface of the fixing blade, thus realizing the fixed installation of the sealing gasket.

[0021] Optionally, the number of mounting protrusions is two and they are symmetrically arranged on both sides of the arrangement hole, and the fixing blade has two mounting holes for the mounting protrusions to be arranged in a one-to-one correspondence.

[0022] By adopting the above technical solution, two mounting protrusions are symmetrically arranged at the bottom of the sealing gasket, and two mounting holes corresponding to the mounting protrusions are opened on the surface of the fixed blade, which helps to further improve the installation stability of the sealing gasket and the fixed blade.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By placing a sealing block on the top of the movable blade and a sealing gasket between the movable blade and the fixed blade, the sealing performance at the connection between the drive box and the shearing mechanism is enhanced, making it less likely for grass clippings to enter the drive box from the top of the movable blade and the gap between the movable blade and the fixed blade when the lawnmower is working.

[0025] 2. By setting the length of the sealing gasket to be greater than the length of the movable groove and covering the lower part of the opening of the movable groove, it is not easy for grass clippings to enter between the movable blades from the movable groove, which helps to improve the sealing of the drive box.

[0026] 3. By using a sponge sealing block with a certain degree of elasticity, the fit between the sealing block and the movable blade, as well as between the sealing block and the sealing gasket, is tighter; the length of the sealing block being greater than the length of the movable groove helps prevent grass clippings from entering the drive box from the movable groove, thereby further improving the sealing performance of the drive box. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the lawnmower cutting device in this embodiment.

[0028] Figure 2 yes Figure 1 A magnified view of the groove arranged at point A in the middle.

[0029] Figure 3 This is a cross-sectional schematic diagram of the lawnmower cutting device along its length in this embodiment.

[0030] Figure 4 This is a schematic diagram of the installation of the sealing gasket and the fixing blade in this embodiment.

[0031] Figure 5 yes Figure 3 A magnified view of the fixed blade and the movable blade clamping the sealing gasket at point B.

[0032] Explanation of reference numerals in the attached drawings: 1. Drive housing; 11. Base; 111. First limiting shaft; 112. Second limiting shaft; 12. Top cover; 121. Arrangement groove; 1211. Movable groove; 1212. Fixed groove; 122. Mounting groove; 13. Transmission assembly; 131. First transmission element; 132. Second transmission element; 1321. Transmission block; 1322. Eccentric wheel; 1323. Pin; 14. Mounting chamber; 2. Sealing mechanism; 21. Sealing block; 22. Sealing gasket; 221. Arc-shaped surface; 222. Arrangement hole; 223. Mounting protrusion; 3. Shearing mechanism; 31. Fixed blade; 311. Mounting hole; 312. Through hole; 313. First limiting hole; 314. Second limiting hole; 32. Movable blade; 321. Transmission hole; 33. Connecting pin. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a lawnmower cutting device with a sealing mechanism. (See also...) Figure 1 and Figure 2 The lawnmower cutting device includes a drive housing 1, a sealing mechanism 2, and a cutting mechanism 3 mounted on the front end of the drive housing 1. The cutting mechanism 3 includes a fixed blade 31 and a movable blade 32 arranged corresponding to the fixed blade 31. The movable blade 32 and the fixed blade 31 are connected by a connecting pin 33. The drive housing 1 includes a base 11, a top cover 12, and a transmission assembly 13. The top cover 12 has an arrangement slot 121 for arranging the cutting mechanism 3 on the side facing the cutting mechanism 3. The arrangement slot 121 includes a movable slot 1211 for the movable blade 32 to rotate left and right and a fixed slot 1212 for arranging the fixed blade 31, and the length of the fixed slot 1212 is greater than the length of the movable slot 1211.

[0035] Reference Figure 3 and Figure 4The rear end of the arrangement groove 121 has a mounting groove 122 connected to the arrangement groove 121. The sealing mechanism 2 includes a sealing block 21 arranged in the mounting groove 122 and a sealing gasket 22 arranged between the movable blade 32 and the fixed blade 31. The length of the sealing block 21 and the length of the sealing gasket 22 are both greater than the length of the movable groove 1211 and cooperate with each other to cover the opening area of ​​the movable groove 1211. The thickness of the sealing gasket 22 gradually decreases along the direction close to the arrangement groove 121, so that the tail end of the movable blade 32 is slightly raised and forms a certain angle with the fixed blade 31, thereby improving the shearing force of the cutting device. The sealing gasket 22 has an outwardly convex arc-shaped surface 221 on the side facing the movable groove 1211, so that grass clippings are not easily retained in the movable groove 1211. In this embodiment, the sealing block 21 is a sponge sealing block 21, and the bottom surface of the sealing groove always tends to abut against the top surface of the movable blade 32 and the top surface of the sealing gasket 22.

[0036] Reference Figure 5 The sealing gasket 22 has a centrally located mounting hole 222 for arranging the connecting pin 33. The sealing gasket 22 has two symmetrically arranged mounting protrusions 223 on the side facing the fixing blade 31, and the fixing blade 31 has two mounting holes 311 for arranging the mounting protrusions 223 in a one-to-one correspondence.

[0037] Reference Figure 3 A mounting chamber 14 is formed between the base 11 and the top cover 12. A transmission assembly 13 is mounted in the center of the mounting chamber 14, including a first transmission element 131 connected to the output end of the drive motor and a second transmission element 132 mounted on the bottom of the first transmission element 131. The side of the first transmission element 131 facing the output end of the drive motor has a gear structure that cooperates with the drive motor. The second transmission element 132 includes a transmission block 1321 directly connected to the first transmission element 131 and an eccentric wheel 1322 coaxially mounted on the bottom of the transmission block 1321. The transmission block 1321 is fixed to the first transmission element 131 by a pin 1323. The surface of the movable blade 32 has a transmission hole 321 that cooperates with the eccentric wheel 1322, and the surface of the fixed blade 31 has a through hole 312 for arranging the transmission assembly 13. The base 11 has a first limiting shaft 111 on the side of the transmission assembly 13 facing away from the shearing mechanism 3 and a second limiting shaft 112 on the side facing the shearing mechanism 3. The surface of the fixed blade 31 is provided with a first limiting hole 313 that is adapted to the first limiting shaft 111 and a second limiting hole 314 that is adapted to the second limiting shaft 112.

[0038] The implementation principle of a lawnmower cutting device with a sealing mechanism in this application embodiment is as follows: When the lawnmower is working, the movable blade 32 rotates left and right along the axis of the connecting pin 33 in the movable groove 1211, and trims weeds with the cooperation of the fixed blade 31; since a sealing block 21 is arranged on the top of the movable blade 32, and a sealing gasket 22 is arranged between the movable blade 32 and the fixed blade 31, and the lengths of the sealing block 21 and the sealing gasket 22 are both greater than the length of the movable groove 1211 and cooperate to seal and cover the opening area of ​​the movable groove 1211, it helps to enhance the sealing performance at the connection between the drive box 1 and the cutting mechanism 3; since the sealing block 21 is a sponge sealing block 21, and always tends to abut against the surface of the movable blade 32 and the surface of the sealing gasket 22, grass clippings are not easily allowed to enter the drive box 1 from the top of the movable blade 32 and the gap between the movable blade 32 and the fixed blade 31.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lawnmower cutting device having a sealing mechanism, characterised in that, The device includes a drive housing (1), a sealing mechanism (2), and a shearing mechanism (3) mounted on the front end of the drive housing (1). The shearing mechanism (3) includes a movable blade (32) and a fixed blade (31) connected by a connecting pin (33). The drive housing (1) includes a base (11), a top cover (12), and a transmission assembly (13). An installation chamber (14) is formed between the base (11) and the top cover (12). The top cover (12) has an arrangement slot (121) for arranging the shearing mechanism (3) on the side facing the shearing mechanism (3). The sealing mechanism (2) includes a sealing block (21) arranged on the top of the movable blade (32) and a sealing gasket (22) arranged between the movable blade (32) and the fixed blade (31).

2. A cutting device for a lawnmower having a sealing mechanism according to claim 1, characterized in that The arrangement slot (121) includes a movable slot (1211) for the movable blade (32) to rotate left and right and a fixed slot (1212) for the fixed blade (31) to be arranged. The length of the fixed slot (1212) is greater than the length of the movable slot (1211).

3. A cutting device for a lawnmower according to claim 2, c h a r a c t e r i s e d in that The length of the sealing gasket (22) is greater than the length of the movable groove (1211) and covers the lower part of the opening of the movable groove (1211).

4. A cutting device for a lawnmower according to claim 3, c h a r a c t e r i s e d in that The top cover (12) has an installation groove (122) for arranging the sealing block (21), the sealing block (21) is a sponge sealing block, the length of the sealing block (21) is greater than the length of the movable groove (1211), and the bottom surface of the sealing block (21) always tends to abut against the top surface of the sealing gasket (22).

5. A cutting device for a lawnmower according to claim 3, c h a r a c t e r i s e d in that The thickness of the sealing gasket (22) gradually decreases along the direction close to the arrangement groove (121).

6. A lawnmower cutting device with a sealing mechanism according to claim 3, characterized in that, The sealing gasket (22) has an outwardly convex arcuate surface (221) on the side facing the movable groove (1211).

7. A cutting device for a lawnmower according to claim 1, characterized in that The sealing gasket (22) has mounting protrusions (223) arranged on the surface facing the fixed blade (31), and the fixed blade (31) has mounting holes (311) for the mounting protrusions (223) to be arranged; the surface of the sealing gasket (22) has arrangement holes (222) for the connecting pin (33) to be arranged.

8. A lawnmower cutting device with a sealing mechanism according to claim 7, characterized in that, The number of mounting protrusions (223) is two and they are symmetrically arranged on both sides of the arrangement hole (222). The fixing blade (31) has two mounting holes (311) for the mounting protrusions (223) to be arranged one-to-one.

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