Lawn mower and cutterhead lower protection structure thereof

Abstract

The utility model discloses a mowing machine and a lower protection structure of a cutter head of the mowing machine, and relates to the technical field of mowing equipment. The cutter head lower protection structure comprises a driving assembly, a cutter head and a protection piece. Wherein the cutterhead is used for cutting weeds, and the cutterhead is coaxially arranged outside an output shaft of the driving assembly in a sleeving mode, so that the cutterhead is driven to rotate through the driving assembly; the protection part is coaxially arranged outside an output shaft of the driving assembly in a sleeving mode, the cutter head is located between the protection part and the driving end of the driving assembly, the protection part shields the middle position of the cutter head, the mower is provided with the cutter head lower protection structure, and when the mower advances to the fluctuating ground, the protection part can make contact with the ground firstly, the land can be bulldozed through the protection part, and then the cutter head is protected; by using the lower protection structure of the cutter head, the condition that the cutter head is damaged due to contact with the ground can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mower technical field, more specifically, relate to a cutterhead lower protection structure, in addition, the utility model relates to a mower including the cutterhead lower protection structure. BACKGROUND

[0002] The mower is a kind of mechanical tool for cutting weeds and flattening green lawn, generally, cutterhead is arranged on the output end side of driving assembly to drive cutterhead rotation, and cutterhead is generally arranged in the bottom of the vehicle body of mower along the lateral extension, so that the cutting or pruning work of weeds can be carried out by the rotation of cutterhead, but the site of mower operation is not always flat grassland, even the ground can also exist hard protruding structure such as rock or stone, it is found in practice that, in the process of mower advancing, cutterhead will inevitably rub with undulating ground, possibly damaging cutterhead, affecting the rotation of cutterhead.

[0003] In view of the above, how to improve the service life of cutterhead is the problem that the present technical personnel urgently solves. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a cutterhead lower protection structure, and the cutterhead lower protection structure can reduce the damage of cutterhead caused by contact with ground

[0005] Another purpose of the utility model is to provide a mower including the cutterhead lower protection structure.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A cutterhead lower protection structure includes:

[0008] Driving assembly;

[0009] Cutterhead for cutting weeds, the cutterhead is coaxially arranged outside the output shaft of the driving assembly to drive the cutterhead rotation by the driving assembly;

[0010] Protection piece, coaxially arranged outside the output shaft of the driving assembly, the cutterhead is located between the protection piece and the driving end of the driving assembly, and the protection piece is shielded in the middle position of the cutterhead.

[0011] Preferably, the protection piece is arranged outside the output shaft of the driving assembly by bearing.

[0012] Preferably, the output shaft of the driving assembly comprises an output shaft body and a mounting screw cylinder, the mounting screw cylinder is sleeved outside the free end of the output shaft body and is in threaded connection with the output shaft body, and the bearing is sleeved outside the mounting screw cylinder sleeve.

[0013] Further comprising a fixing member, the fixing member is in threaded connection with the mounting screw cylinder and abuts against the end of the bearing away from the driving end of the driving assembly, so as to press the bearing against the output shaft of the driving assembly.

[0014] Preferably, further comprising a first connecting member;

[0015] The protective member is a shell structure, the first connecting member is located inside the protective member and is sleeved outside the bearing;

[0016] The first end of the first connecting member away from the driving end is fixedly connected with the protective member;

[0017] The second end of the first connecting member close to the driving end abuts against the first end of the bearing close to the driving end;

[0018] The first end of the bearing abuts against the stepped surface of the output shaft, and the second end of the fixing member away from the driving end abuts against the bearing.

[0019] Preferably, the protective member is a spherical top structure, the diameter of the first end of the protective member is greater than the diameter of the second end of the protective member, the first end of the protective member is close to the cutter head, and the second end of the protective member is away from the cutter head.

[0020] Preferably, the bottom end of the cutter head has a ring-shaped blocking protrusion, and the blocking protrusion surrounds the first end of the protective member.

[0021] Preferably, the output shaft is sleeved with a second connecting member outside, the bottom of the second connecting member away from the driving end is fixedly connected with the cutter head.

[0022] Preferably, further comprising a mounting seat, the mounting seat is a cylindrical structure, the driving assembly is installed inside the mounting seat, and the output shaft of the driving assembly extends to the outside of the mounting seat.

[0023] Preferably, one end of the mounting seat close to the cutter head has a ring-shaped first shielding ring, one end of the cutter head close to the mounting seat has a ring-shaped second shielding ring, and the first shielding ring and the second shielding ring are sleeved with each other.

[0024] A mower comprising the cutter head lower protective structure of any one of the above.

[0025] The cutter head lower protection structure provided by the utility model is characterized in that a cutter head and a protection piece are sequentially sleeved from top to bottom on the output shaft of the driving assembly, the cutter head and the output shaft of the driving assembly are connected in power transmission through interference fit or key connection, the output shaft of the driving assembly drives the cutter head to rotate, the protection piece is sleeved on the outside of the output shaft of the driving assembly and shields the middle position in the cutter head, that is, shields the middle part of the cutter head which is not provided with blades, the protection piece is located on the inner side of the blades of the cutter head, and the cutter head is located on the side of the protection piece which is away from the stator of the driving assembly.

[0026] When in use, after the cutter head lower protection structure is arranged on the mower vehicle body, the output shaft of the driving assembly extends vertically, the cutter head is located at the bottom of the mower vehicle body, and the protection piece is located below the cutter head, so when the mower travels on undulating ground, the protection piece will first contact the ground and can push the ground flat through the protection piece, so as to effectively reduce the damage of the cutter head caused by the contact with the ground. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the utility model, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0028] Figure 1 The structure schematic view of the specific embodiment provided by the utility model is shown in the figure.

[0029] Figure 2 The sectional view of the specific embodiment provided by the utility model is shown in the figure.

[0030] Figure 3 The explosion view of the specific embodiment provided by the utility model is shown in the figure.

[0031] Figure 4 The local schematic view of the specific embodiment provided by the utility model is shown in the figure.

[0032] Reference signs:

[0033] 1-driving assembly; 11-output shaft; 111-output shaft body; 112-mounting screw cylinder; 2-cutter head; 21-second shielding ring; 22-blocking protrusion; 23-second positioning protrusion; 3-protection piece; 31-first positioning protrusion; 4-mounting seat; 41-first shielding ring; 5-bearing; 6-first connecting piece; 7-fixing piece; 8-second connecting piece. DETAILED DESCRIPTION

[0034] Clearly, the described embodiments are merely 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 skilled in the art without creative labor fall within the scope of protection of the present utility model.

[0035] The core of the present utility model is to provide a lower cutter guard structure, which can prevent the cutter 2 from being damaged by contacting the ground. Another core of the present utility model is to provide a lawn mower comprising the above lower cutter guard structure.

[0036] Please refer to Figure 1 The present utility model provides a lower cutter guard structure, comprising a driving assembly 1, a cutter 2 and a guard 3. The cutter 2 is used for cutting weeds, and the cutter 2 is coaxially sleeved outside the output shaft 11 of the driving assembly 1 to drive the cutter 2 to rotate by the driving assembly 1. The guard 3 is coaxially sleeved outside the output shaft 11 of the driving assembly 1, and the cutter 2 is located between the guard 3 and the driving end of the driving assembly 1, and the guard 3 is located at the middle position of the cutter 2. It can be understood that the "driving end of the driving assembly 1" refers to the power structure for driving the output shaft 11 to rotate, such as a motor, or a motor and a speed reducer fixedly connected.

[0037] As shown in Figure 1 and Figure 2 , the cutter 2 and the guard 3 are sequentially sleeved on the output shaft 11 of the driving assembly 1 from top to bottom, and the cutter 2 is connected in power transmission with the output shaft 11 of the driving assembly 1 by interference fit or key connection, so that the cutter 2 can be driven to rotate by the output shaft 11 of the driving assembly 1. The guard 3 is sleeved on the outside of the output shaft 11 of the driving assembly 1 and shields the middle position of the cutter 2, i.e. the middle part of the cutter 2 without blades. The guard 3 is located on the inside of the blades of the cutter 2, and the cutter 2 is located on the side of the guard 3 away from the stator of the driving assembly 1.

[0038] In use, after the lower cutter guard structure is arranged on the vehicle body of the lawn mower, the output shaft 11 of the driving assembly 1 extends vertically, and the cutter 2 is located at the bottom of the vehicle body of the lawn mower, and the guard 3 is located below the cutter 2. When the lawn mower travels on the undulating ground, the guard 3 will first contact the ground, and the land can be flattened by the guard 3, so as to effectively prevent the cutter 2 from being damaged by contacting the ground.

[0039] On the basis of the above-mentioned embodiments, the guard 3 is sleeved outside the output shaft 11 of the driving assembly 1 by the bearing 5.

[0040] AsFigure 2 As shown, the middle position of the protection piece 3 has a through hole, and the bearing 5 is sleeved inside the through hole. When the bearing 5 is sleeved outside the output shaft 11 of the driving assembly 1, the output shaft 11 of the driving assembly 1, the bearing 5, and the protection piece 3 are sequentially sleeved from inside to outside, and the protection piece 3 can rotate relative to the output shaft 11 of the driving assembly 1, so as to effectively avoid the rotation resistance of the undulating ground acting on the protection piece 3 from being transmitted to the output shaft 11 of the driving assembly 1, thereby ensuring the mowing capability of the mower.

[0041] On the basis of the above embodiment, the output shaft 11 of the driving assembly 1 comprises an output shaft body 111 and a mounting sleeve 112, the mounting sleeve 112 is sleeved outside the free end of the output shaft body 111 and is threadedly connected with the output shaft body 111, and the bearing 5 is sleeved outside the mounting sleeve 112; and the fixing piece 7 is threadedly connected with the mounting sleeve 112 and abuts against the end of the bearing 5 away from the driving end of the driving assembly 1, so as to press the bearing 5 against the output shaft 11 of the driving assembly 1.

[0042] As shown in the drawings, Figure 2 The upper end of the output shaft body 111 is drivingly connected to the driving end of the driving assembly 1, so that the driving end of the driving assembly 1 can drive the output shaft 11 to rotate, and the mounting sleeve 112 is sleeved at the lower end of the output shaft body 111, and the lower end of the output shaft body 111 has external threads, and the hollow mounting sleeve 112 has internal threads, so that the lower end of the output shaft body 111 can be threadedly connected with the mounting sleeve 112.

[0043] Correspondingly, the fixing piece 7 has a stepped rod structure, the diameter of the upper end of the fixing piece 7 is smaller than that of the lower end, the upper end of the fixing piece 7 has external threads, and the upper end of the fixing piece 7 can be inserted into the lower end of the mounting sleeve 112 and threadedly connected therewith. In this way, the mounting and dismounting of the protection piece 3 are facilitated.

[0044] On the basis of the above embodiment, the first connecting piece 6 is further provided; the protection piece 3 has a shell structure, the first connecting piece 6 is located inside the protection piece 3 and sleeved outside the bearing 5; the first end of the first connecting piece 6 away from the driving end is fixedly connected with the protection piece 3; the second end of the first connecting piece 6 close to the driving end abuts against the first end of the bearing 5 close to the driving end; the first end of the bearing 5 abuts against the stepped surface of the output shaft 11, and the second end of the fixing piece 7 away from the driving end abuts against the bearing 5. It can be understood that the “stepped surface” refers to the connecting surface between the variable-diameter hole segments in the stepped hole, or the connecting surface between the variable-diameter rod segments in the stepped rod.

[0045] As shown in the drawings, Figure 2As shown, the top of the shield 3 has a receiving groove to accommodate the first connecting piece 6, and the lower end of the first connecting piece 6 has a foot to be fixedly connected to the shield 3 by welding or screwing or the like.

[0046] Correspondingly, the first connecting piece 6 is hollow, and the central through hole of the first connecting piece 6 is a stepped hole, the upper end of the inner hole of the first connecting piece 6 has a smaller diameter than the lower end, the bearing 5 can be inserted into the lower end part hole segment of the first connecting piece 6, the upper end of the outer ring of the bearing 5 abuts against the stepped surface inside the first connecting piece 6, and the upper end of the inner ring of the bearing 5 abuts against the stepped surface of the outer periphery of the output shaft 11; and the fixing piece 7 extends along the circumference of the output shaft 11 and is inserted into the inside of the output shaft 11 in a threaded connection, and the fixing piece 7 is a stepped rod, the lower end of the fixing piece 7 with a larger diameter abuts against the lower end of the inner ring of the bearing 5, so as to realize the mutual cooperation and connection of the output shaft 11, the bearing 5, the first connecting piece 6 and the shield 3.

[0047] Further, the circumferential surface of the fixing piece 7 is gap-fitted with the central through hole of the shield 3, so as to prevent sundries from entering the bearing 5 and affecting its rotation; further, the inner wall of the bottom end of the shield 3 abuts against the outer ring of the bearing 5.

[0048] Further, the inside of the shield 3 has a first positioning protrusion 31 in the shape of a ring to insert the lower end of the first connecting piece 6 in the inner cavity thereof, so that the shield 3 is facilitated to be positioned and installed in place.

[0049] On the basis of the above embodiment, the shield 3 is in the shape of a ball top, and the diameter of the first end of the shield 3 is larger than that of the second end thereof, the first end of the shield 3 is close to the cutter head 2, and the second end of the shield 3 is away from the cutter head 2.

[0050] As shown in the drawings, Figures 1 to 3 the shield 3 is in the shape of a ball top, the upper end of the shield 3 with a larger diameter faces the upper cutter head 2, and the lower end of the shield 3 with a reduced diameter faces the ground, so as to reduce the travel resistance of the mower.

[0051] On the basis of the above embodiment, the bottom end of the cutter head 2 has a blocking protrusion 22 in the shape of a ring, and the first end of the shield 3 is surrounded by the blocking protrusion 22.

[0052] As shown in the drawings, Figure 2 and Figure 3 the bottom end of the cutter head 2 has a blocking protrusion 22 in the shape of a ring, and the upper end of the shield 3 can be inserted into the inside of the blocking protrusion 22, so that the gap between the shield 3 and the cutter head 2 can be surrounded by the blocking protrusion 22, and sundries can be prevented from entering the space between the shield 3 and the cutter head 2.

[0053] On the basis of the above embodiment, the outer part of the output shaft 11 is sleeved with the second connecting piece 8, and the second connecting piece 8 is fixedly connected to the cutter head 2 away from the bottom of the driving end.

[0054] As shown in Figure 2 , the second connecting piece 8 is a hollow structure, which is sleeved on the outer part of the output shaft 11, and the lower end of the second connecting piece 8 can be fixedly connected to the cutter head 2 by means of threads or welding, etc. When assembling, the cutter head 2 and the second connecting piece 8 can be fixedly connected as an integrated structure, and then the integrated structure is sleeved on the outer part of the output shaft 11, so as to facilitate the installation of the cutter head 2.

[0055] Further, the upper end of the cutter head 2 has a ring-shaped second positioning protrusion 23, which is inserted into the lower end of the second connecting piece 8 in the inner cavity, so that the second connecting piece 8 is positioned and installed in place.

[0056] Preferably, the cutter head 2 and the second connecting piece 8, and the protective piece 3 and the first connecting piece 6 are detachably connected by threads, which can be screws, or can also be threaded bolts and nuts.

[0057] On the basis of the above embodiment, the mounting seat 4 is further included, which is a cylindrical structure, and the driving assembly 1 is installed in the inner part of the mounting seat 4, and the output shaft 11 of the driving assembly 1 extends to the outer part of the mounting seat 4.

[0058] As shown in Figures 1 to 3 , the mounting seat 4 is a cylindrical structure, which can accommodate the driving assembly 1, and the bottom wall of the mounting seat 4 is provided with a through hole, so that the output shaft 11 extends to the outside, and the overall strength of the cutter head lower protective structure is relatively high, which is convenient to install when needed.

[0059] On the basis of the above embodiment, the mounting seat 4 has a ring-shaped first shielding ring 41 near the cutter head 2, and the cutter head 2 has a ring-shaped second shielding ring 21 near the mounting seat 4, and the first shielding ring 41 and the second shielding ring 21 are sleeved with each other.

[0060] As shown in Figure 2As shown, the lower end of the mounting base 4 has a first shielding ring 41 in the form of a ring, and the upper end of the cutter head 2 has a second shielding ring 21 in the form of a ring in cooperation, the driving assembly 1 is installed in the inner cavity of the mounting base 4, and the output shaft 11 of the driving assembly 1 extends to the outside of the lower end of the mounting base 4, when installing, the cutter head 2 is pushed to be sleeved on the outside of the output shaft 11 upwards, after the cutter head 2 is moved to the position, the second shielding ring 21 above the cutter head 2 is inserted into the inside of the first shielding ring 41 below the mounting base 4, or the first shielding ring 41 below the mounting base 4 is inserted into the second shielding ring 21 above the cutter head 2, in this way, it is beneficial to prevent foreign matters from entering the space between the cutter head 2 and the mounting base 4, so as to ensure the smoothness of the rotation of the output shaft 11.

[0061] In addition to the above-mentioned cutter head lower protection structure, the utility model also provides a mower comprising the cutter head lower protection structure disclosed in the above-mentioned embodiment, and the structures of other parts of the mower refer to the prior art, and will not be described herein.

[0062] It should be noted that the relationship terms such as "first" and "second" described above are only used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between the entities; the "upper surface, lower surface, top, bottom" and the orientation words "up, down, left, right" described above are defined based on the drawings.

[0063] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0064] The mower and the cutter head lower protection structure thereof provided by the utility model are described in detail. The principle and implementation mode of the utility model are described by applying specific examples in the specification, and the description of the above embodiments is only used to help 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.

Claims

1. A shroud structure under a cutter head, characterized by, The utility model relates to a kind of weed cutter, including: Drive assembly (1); Blade disc (2) for cutting weeds, the blade disc (2) coaxially is set outside the output shaft (11) of the drive assembly (1), to drive the blade disc (2) rotation by the drive assembly (1); Shielding piece (3) is coaxially set outside the output shaft (11) of the drive assembly (1), the blade disc (2) is located between the shielding piece (3) and the drive end of the drive assembly (1), and the shielding piece (3) is blocked in the intermediate position of the blade disc (2); The shielding piece (3) is spherical top structure, and the diameter of the first end of the shielding piece (3) is greater than the diameter of its second end, the first end of the shielding piece (3) is close to the blade disc (2), the second end of the shielding piece (3) is away from the blade disc (2); The bottom end of the blade disc (2) has annular blocking protrusion (22), and the blocking protrusion (22) is surrounded around the first end of the shielding piece (3).

2. The undercutter guard structure according to claim 1, characterized in that, The shielding piece (3) is set outside the output shaft (11) of the drive assembly (1) by bearing (5).

3. The undercutter guard structure according to claim 2, wherein The output shaft (11) of the drive assembly (1) includes output shaft body (111) and installation screw cylinder (112), the installation screw cylinder (112) is set outside the free end of the output shaft body (111), and is connected with the output shaft body (111) by screw thread, and the bearing (5) is set outside the installation screw cylinder (112) sleeve. Further including fixing piece (7), the fixing piece (7) is connected with the installation screw cylinder (112) by screw thread, and is abutted to the end of the bearing (5) away from the drive end of the drive assembly (1), to press the bearing (5) and set on the output shaft (11) of the drive assembly (1).

4. The undercutter guard structure according to claim 3, wherein Further including first connecting piece (6); The shielding piece (3) is housing structure, and the first connecting piece (6) is located in the inside of the shielding piece (3), and is set outside the bearing (5); The first end bottom of the first connecting piece (6) away from the drive end is fixedly connected with the shielding piece (3); The second end of the first connecting piece (6) close to the drive end is abutted to the first end of the bearing (5) close to the drive end; The first end of the bearing (5) is abutted to the stepped surface of the output shaft (11), and the fixing piece (7) is abutted to the second end of the bearing (5) away from the drive end.

5. The undercutter guard structure of claim 1, wherein The second connecting piece (8) is fixedly connected with the blade disc (2) on the bottom away from the drive end of the output shaft (11).

6. The undercutter guard structure according to any one of claims 1 to 5, wherein Further including mounting seat (4), the mounting seat (4) is cylindrical structure, the drive assembly (1) is installed in the inside of the mounting seat (4), and the output shaft (11) of the drive assembly (1) is stretched to the outside of the mounting seat (4).

7. The undercutter guard structure of claim 6, wherein, The end close to the blade disc (2) of the mounting seat (4) has annular first shielding ring (41), and the end close to the mounting seat (4) of the blade disc (2) has annular second shielding ring (21), and the first shielding ring (41) and the second shielding ring (21) are set outside each other.

8. A lawnmower characterised in that The cutter head lower protection structure according to any one of claims 1-7.

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