Cutter head and mower
By incorporating ventilation openings and centrifugal axial flow blades on the cutter head, the problem of clogging between the cutter head and chassis in lawnmowers is solved, achieving efficient grass cutting and motor protection.
Patent Information
- Application Number
- CN202422835876.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-20
AI Technical Summary
In existing lawnmowers, the blade and chassis are prone to clogging with grass clippings and wet grass, causing the mowing motor to malfunction.
Design a cutter head that includes an axially extending vent and centrifugal axial flow blades. The airflow is guided by the windward side of the centrifugal axial flow blades to flow upward and radially outward of the cutter head, preventing shredded and wet grass from entering the space between the cutter head and the chassis.
It effectively prevents clogging from grass clippings and wet grass, improves mowing efficiency, reduces wear on the mowing motor, and extends the life of the blades.
Smart Images
Figure CN223553786U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the lawn mower technical field more specifically, relate to a cutterhead and lawn mower. BACKGROUND
[0002] The lawn cutting mechanism of the lawn mower on the market is mainly divided into two categories, one is rotary knife type, and the other is hob type. The rotary knife type is that the blade on the high-speed rotating cutter head impacts and cuts the grass; the hob type is that the double-blade scissors are formed by the hob of the drum type hob and the bottom knife, and the grass is rolled into the hob and the fixed knife to realize the shearing of the grass.
[0003] In the existing lawn mower, the cutter head is located below the chassis of the lawn mower, and under the driving of the cutting motor, the cutter head rotates, and the blades installed on the cutter head cut the grass. However, the cut grass, especially wet grass, is easy to block between the cutter head and the chassis of the lawn mower, and in serious cases, it may exert resistance on the output shaft of the cutting motor, causing the cutting motor to fail to work.
[0004] Therefore, how to solve the problem of easy blocking of grass and wet grass between the cutter head and the chassis is a problem that needs to be solved by the technical personnel in the field at present. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model aims at providing a cutter head which can avoid the blocking of grass and wet grass between the cutter head and the chassis of the lawn mower.
[0006] Another object of the utility model is to provide a lawn mower comprising the cutter head, which can prevent the cut grass from entering the space between the cutter head and the chassis of the lawn mower, avoid the blocking of grass, and improve the efficiency of mowing.
[0007] In order to achieve the above object, the utility model provides the following technical scheme:
[0008] A cutter head comprises:
[0009] A cutter head body is provided with a ventilation opening penetrating along the axial direction of the cutter head body;
[0010] A centrifugal axial flow blade is arranged on the top surface of the cutter head body, and has a windward surface extending upwardly and obliquely relative to the axial direction of the cutter head body and extending toward the outer edge of the cutter head body relative to the radial direction of the cutter head body.
[0011] Preferably, the centrifugal axial flow blade can generate airflow toward the upper part of the outer edge of the cutter head body.
[0012] Preferably, a plurality of centrifugal axial flow blades are arranged radially along the cutter head body, and are arranged at equal intervals on the cutter head body.
[0013] Preferably, the centrifugal axial flow blades extend in a curved shape in the diameter direction of the cutter head body.
[0014] Preferably, the cutter head body and the centrifugal axial flow blades are integrally formed in an integrated structure.
[0015] Preferably, the ventilation openings are provided in multiple groups, and one group of ventilation openings is arranged between any two adjacent centrifugal axial flow blades.
[0016] Preferably, any one group of ventilation openings includes multiple ventilation openings arranged in the radial direction of the cutter head body.
[0017] Preferably, the ventilation openings are provided as arc-shaped slits extending in the circumferential direction of the cutter head body, and the width of the arc-shaped slits is less than 2mm, or the ventilation openings are provided as circular holes arranged in the circumferential direction of the cutter head body, and the diameter of the circular holes is less than 2mm.
[0018] Preferably, the cutter further includes a blade detachably arranged on the bottom surface of the cutter head body through a connecting piece, the edge of the cutter head body is provided with multiple equally-spaced grooves, a protrusion is arranged in each groove, and a mounting hole for mounting the connecting piece is arranged on the protrusion.
[0019] Preferably, the center of the cutter head body is provided with a mounting portion for connecting the output shaft of a grass cutting motor, and the cutter head body is coaxially arranged with the output shaft of the grass cutting motor.
[0020] A grass cutting machine includes the cutter described in any one of the preceding embodiments.
[0021] Preferably, the grass cutting machine further includes a chassis and a motor, the output shaft of the motor is in transmission connection with the cutter, and the cutter is located below the chassis.
[0022] The cutter provided by the utility model includes a cutter head body and centrifugal axial flow blades, specifically, the cutter head body is provided with ventilation openings penetrating in the axial direction of the cutter head body, the ventilation openings are arranged to enable the wind below the cutter head body to enter the upper part of the cutter head body when the cutter head body rotates, the centrifugal axial flow blades are arranged on the top surface of the cutter head body, the centrifugal axial flow blades have windward surfaces, the windward surfaces extend upwardly and obliquely relative to the axial direction of the cutter head body and extend obliquely relative to the radial direction of the cutter head body and toward the outer edge of the cutter head body, the wind entering the upper part of the cutter head body through the ventilation openings is located on the windward surfaces of the centrifugal axial flow blades, the windward surfaces of the centrifugal axial flow blades can guide the flow direction of the wind to flow upwardly and simultaneously flow outwardly in the radial direction of the cutter head body, so that the cut grass and wet grass can be prevented from entering the space between the cutter head body and the chassis of the grass cutting machine, and the grass blocking condition can be avoided. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on the provided drawings without creative labor.
[0024] Figure 1 Structure diagram of the cutter head provided by the present application;
[0025] Figure 2 Structure diagram of the cutter head provided by the present application from another perspective;
[0026] Figure 3 Top view of the cutter head provided by the present application;
[0027] Figure 4 Flow direction diagram of the wind flowing through the cutter head in the prior art;
[0028] Figure 5 Flow direction diagram of the wind flowing through the cutter head in the present application.
[0029] Reference signs:
[0030] 1-cutter head body, 11-vent, 12-groove, 13-boss, 14-mounting part;
[0031] 2-centrifugal axial flow blade, 21-windward surface;
[0032] 3-blade;
[0033] 4-connection. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0036] It should be noted that the following "up, down" and other orientation words are based on the definition of the accompanying drawings.
[0037] The core of the utility model is to provide a cutter head, can avoid the grass, wet grass blockage between cutter head and mower chassis. Another core of the utility model provides a mower including the cutter head, can prevent the cut grass into the space between cutter head and mower chassis, avoid the situation of grass blockage, thereby improve the efficiency of mowing.
[0038] Please refer to Figure 1 , Figure 2 and Figure 3 , a cutter head includes cutter head body 1 and centrifugal axial flow blade 2.
[0039] Specifically, the cutter head body 1 is provided with a ventilation opening 11 through the axial direction of the cutter head body 1, by setting the ventilation opening 11, when the cutter head body 1 rotates, the wind below the cutter head body 1 enters the upper part of the cutter head body 1 from the ventilation opening 11, the centrifugal axial flow blade 2 is arranged on the top surface of the cutter head body 1, the centrifugal axial flow blade 2 has a windward surface 21, the windward surface 21 extends upwardly relative to the axial direction of the cutter head body 1, and extends to the outer edge of the cutter head body 1 relative to the radial direction of the cutter head body 1, the wind entering the upper part of the cutter head body 1 from the ventilation opening 11 is located on the windward surface 21 of the centrifugal axial flow blade 2, the flow direction of the wind can be guided to flow upwardly and outwardly relative to the radial direction of the cutter head body 1 through the windward surface 21 of the centrifugal axial flow blade 2, so that the cut grass and wet grass can be prevented from entering the space between the cutter head body 1 and the mower chassis, thereby avoiding the situation of grass blockage.
[0040] Please refer to Figure 4 , which is a way of using only centrifugal blades in the prior art, the flow direction of the wind is indicated by the path A, so that the wind will first flow towards the shaft of the mower motor, and then be guided to the radial outer side of the cutter head by the centrifugal blades. During the whole process, the cut grass will first contact the shaft of the mower motor, and when the cut grass is wet, it is easy to wrap around the shaft, and then gradually accumulate the cut grass. However, the centrifugal axial flow blade 2 provided by the present application has a flow direction as shown by the path B indicated by Figure 5 , the wind enters the upper part of the cutter head body 1 from the ventilation opening 11 and flows outwardly relative to the radial direction of the cutter head body 1 through the windward surface 21 of the centrifugal axial flow blade 2, which guides the flow direction of the wind to flow upwardly and outwardly relative to the radial direction of the cutter head body 1, so that the cut grass and wet grass can be prevented from entering the space between the cutter head and the mower chassis, thereby avoiding the situation of grass blockage.
[0041] The cutter head is arranged in the above manner, when the cutter head body 1 rotates, the cutter blade 3 cuts the grass, and at the same time, the wind generated by the rotation of the cutter head body 1 can enter the upper part of the cutter head body 1 from the air vent 11, and the flow direction of the wind can be guided to the upper part of the cutter head body 1 and the radial outer side of the cutter head body 1 through the windward surface 21 of the centrifugal axial flow blade 2, so that the cut grass and wet grass cannot enter the space between the cutter head body 1 and the mower chassis, and the grass blocking phenomenon is avoided.
[0042] In the above embodiment, the centrifugal axial flow blade 2 can generate an air flow towards the upper part of the outer edge of the cutter head body 1.
[0043] It can be understood that under the driving of the air flow, the cut grass cannot enter the space between the cutter head body 1 and the mower chassis, and even if part of the cut grass enters the space between the cutter head body 1 and the mower chassis, it will also leave the space between the cutter head body 1 and the mower chassis under the driving of the air flow generated by the centrifugal axial flow blade 2, so that the grass blocking phenomenon is avoided.
[0044] In the above embodiment, the centrifugal axial flow blade 2 is provided in a plurality, the plurality of centrifugal axial flow blades 2 are arranged radially along the cutter head body 1, and the plurality of centrifugal axial flow blades 2 are equidistantly arranged on the cutter head body 1.
[0045] It should be noted that the centrifugal axial flow blade 2 is vertically installed on the top end surface of the cutter head body 1, and works on the gas by rotation to improve the pressure and speed of the gas, which is used for occasions requiring large flow, has large gas flow capacity per unit area, small radial size, and has the advantages of simple structure, easy operation and maintenance, etc.
[0046] Among them, by setting the centrifugal axial flow blade 2, the grass cutting efficiency and the airflow field performance inside the cutter head body 1 are improved, so that the cutter blade 3 can form a specific airflow vortex at the rear part of the cutter blade 3 when the cutter blade 3 rotates, thereby affecting the working effect of the mower. The centrifugal axial flow blade 2 on the cutter head body 1 can ensure that the airflow can be effectively guided when the cutter blade 3 rotates, helping the grass to repeatedly contact the cutter blade 3, thereby improving the grass cutting effect.
[0047] In the above case, the centrifugal axial flow blade 2 extends in a curved shape in the diameter direction of the cutter head body 1.
[0048] It can be understood that the new blade formed by combining the characteristics of the axial flow blade and the centrifugal blade can obtain the above-mentioned wind flow direction, and as long as the windward surface 21 is inclined, the effect of the axial flow direction can be achieved. The inclined design of the centrifugal axial flow blade 2 helps to improve the grass cutting quality, and by reasonably designing the inclination angle of the centrifugal axial flow blade 2, the cut grass can be smoothly discharged, avoiding the blockage of the cutter head body 1, thereby reducing the wear of the cutter blade 3 and prolonging the service life of the cutter blade 3.
[0049] Further, the cutter head body 1 and the centrifugal axial flow blade 2 are integrally formed in an integrated structure.
[0050] Need to be explained, the cutter head body and the centrifugal axial flow blade 2 are set as integrally formed in an integrated structure, can prevent the gap between the cutter head body and the blade, prevent the grass in the gap.
[0051] In the above embodiment, the ventilation port 11 is provided with multiple groups, and a group of ventilation ports 11 is arranged between the adjacent two centrifugal axial flow blades 2.
[0052] It can be understood that the centrifugal axial flow blade 2 is spaced apart along the circumferential direction of the cutter head body 1, and the ventilation port 11 is arranged between the adjacent two centrifugal axial flow blades 2, so that the windward surface 21 of each centrifugal axial flow blade 2 can guide the wind entering from the corresponding ventilation port 11, and the flow direction of the wind can be guided to flow upward and outward of the cutter head body 1, thereby avoiding the cut grass and wet grass entering the space between the cutter head body 1 and the mower chassis, and further avoiding the grass blocking.
[0053] On the basis of the above embodiment, any one group of ventilation ports 11 includes multiple ventilation ports 11 arranged along the radial direction of the cutter head body 1.
[0054] Need to be explained, the ventilation port is provided with multiple, in guaranteeing the air volume, can also reduce the area of each ventilation port 11, prevent the grass from passing through the ventilation port 11.
[0055] In the above embodiment, the ventilation port 11 is arranged as an arc-shaped slot extending along the circumferential direction of the cutter head body 1, and the width of the arc-shaped slot is less than 2mm, or the ventilation port 11 is a circular hole arranged along the circumferential direction of the cutter head body 1, and the diameter of the circular hole is less than 2mm.
[0056] It can be understood that the ventilation port 11 can be arranged as an arc-shaped slot extending along the circumferential direction of the cutter head, or as a circular hole, or any other shape, the width of the arc-shaped slot can be set to be less than 2mm, preferably 1.5mm, and the diameter of the circular hole can be set to be less than 2mm, such as 1.5mm. In actual application, according to the type of grass on the lawn, the size of the arc-shaped slot or the circular hole can be adjusted accordingly to ensure that the ventilation port 11 can enter enough air volume and block the grass from passing through the ventilation port 11 to prevent the ventilation port 11 from being blocked by grass.
[0057] In the above embodiment, the blade 3 is detachably arranged on the bottom surface of the cutter head body 1 through the connecting piece 4, the edge of the cutter head body 1 has multiple equidistantly arranged grooves 12, the protrusion 13 is arranged in the groove 12, and the mounting hole for mounting the connecting piece 4 is arranged on the protrusion 13.
[0058] Need to explain, the blade 3 is detachably installed on the cutter head body 1 through the connecting piece 4, when the blade 3 needs to be replaced due to wear, the blade 3 can be removed to replace a new blade 3.
[0059] In the above case, the center of the cutter head body 1 is provided with a mounting portion 14 for connecting the output shaft of the mower motor, and the cutter head body 1 is coaxially arranged with the output shaft of the mower motor.
[0060] It can be understood that the center of the cutter head body 1 is provided with a mounting portion 14 for connecting the output shaft of the mower motor, and the cutter head body 1 is coaxially arranged with the output shaft of the mower motor.
[0061] In addition to the cutter disclosed in the above embodiments, the utility model also provides a mower comprising the cutter, the mower further comprises a chassis and a motor, the output shaft of the motor is in transmission connection with the cutter, and the cutter is located below the chassis.
[0062] When the mower is used for mowing, the motor is started, the output shaft of the motor drives the cutter to rotate, so that the blades 3 on the cutter cut the grass, and at the same time, the wind generated by the rotation of the cutter can enter the upper part of the cutter through the air vents 11 on the cutter, and the flow direction of the wind can be guided to flow towards the upper part of the cutter and simultaneously flow towards the radial outer side of the cutter through the windward surface 21 of the centrifugal axial flow blade 2, so that the cut grass and wet grass can be prevented from entering the space between the cutter and the chassis, and the grass blocking can be avoided. Moreover, the design of the air vents 11 on the cutter can ensure the air inlet amount, and can also reduce the area of each air vent 11 to prevent the grass from passing through the air vents 11.
[0063] The structures of other parts of the mower can refer to the prior art, and will not be described here.
[0064] In summary, the cutter provided by the utility model drives the cutter head body 1 to rotate through the mower motor, drives the blades 3 to cut the grass, makes the wind below the cutter head body 1 enter the upper part of the cutter head body 1 through the air vents 11, and guides the flow direction of the wind to flow towards the upper part of the cutter head body 1 and simultaneously flow towards the radial outer side of the cutter head body 1 through the windward surface 21 of the centrifugal axial flow blade 2, so that the cut grass and wet grass can be prevented from entering the space between the cutter head body 1 and the chassis of the mower, and the grass blocking can be avoided.
[0065] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other.
[0066] The above has carried out the detailed introduction to the cutter head and the mower provided by the utility model. The principle and implementation mode of the utility model are described by applying specific examples in this paper, and the above embodiment description is only used for helping to understand the method and core idea of the utility model. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.
Claims
1. A cutter head, characterized in that, include: The cutter head body (1) is provided with a ventilation port (11) that extends through the axial direction of the cutter head body (1). Centrifugal axial flow blade (2) is disposed on the top surface of the cutter head body (1). The centrifugal axial flow blade (2) has a windward surface (21). The windward surface (21) extends upward at an axial angle relative to the cutter head body (1) and extends towards the outer edge of the cutter head body (1) at a radial angle relative to the cutter head body (1).
2. The cutter head according to claim 1, characterized in that, The centrifugal axial flow blades (2) are capable of generating airflow toward the outer edge of the cutter head body (1).
3. The cutter head according to claim 1, characterized in that, The centrifugal axial flow blades (2) are provided in multiple ways. The multiple centrifugal axial flow blades (2) are arranged radially along the radial direction of the cutter body (1), and the multiple centrifugal axial flow blades (2) are arranged at equal intervals on the cutter body (1).
4. The cutter head according to claim 1, characterized in that, The centrifugal axial flow blade (2) extends in a curved shape in the diameter direction of the cutter head body (1).
5. The cutter head according to claim 1, characterized in that, The cutter head body (1) and the centrifugal axial flow blades (2) are integrally formed into a single structure.
6. The cutter head according to claim 1, characterized in that, The ventilation opening (11) is provided in multiple sets, and a set of ventilation opening (11) is provided between each two adjacent centrifugal axial flow blades (2).
7. The cutter head according to claim 6, characterized in that, Each set of the ventilation openings (11) includes multiple ventilation openings (11) arranged radially along the cutter head body (1).
8. The cutter head according to claim 7, characterized in that, The ventilation opening (11) is configured as an arc-shaped slit extending circumferentially along the cutter head body (1), the width of the arc-shaped slit being less than 2 mm, or the ventilation opening (11) is a circular hole arranged circumferentially along the cutter head body (1), the diameter of the circular hole being less than 2 mm.
9. The cutter head according to claim 1, characterized in that, It also includes a blade (3), which is detachably disposed on the bottom surface of the cutter body (1) via a connector (4). The edge of the cutter body (1) has a plurality of equally spaced grooves (12), and a protrusion (13) is provided in the groove (12). The protrusion (13) is provided with mounting holes for mounting the connector (4).
10. The cutter head according to claim 1, characterized in that, The cutter head body (1) has a mounting part (14) at its center for connecting the output shaft of the mowing motor, and the cutter head body (1) is coaxially arranged with the output shaft of the mowing motor.
11. A lawnmower, characterized in that, Includes the cutter head as described in any one of claims 1-9.
12. The lawnmower according to claim 11, characterized in that, It also includes a chassis and a motor, the output shaft of which is connected to the cutter head via a drive mechanism, and the cutter head is located below the chassis.