Cutter head shield lifting structure and mower

Abstract

The utility model provides a cutterhead shield lifting structure and a mower, the cutterhead shield lifting structure comprises a chassis, a cutterhead rotationally arranged below the chassis, a first driving motor and a cutterhead shield, the first driving motor is vertically arranged above the chassis in a lifting manner, and an output shaft of the first driving motor vertically penetrates through the chassis from top to bottom and then is coaxially connected with the cutterhead; the cutterhead shield is vertically arranged below the chassis in a lifting manner and covers the peripheral side of the cutterhead, and the cutterhead shield is detachably connected with the first driving motor through a connecting piece, so that the cutterhead shield and the cutterhead synchronously ascend and descend when the first driving motor drives the cutterhead to vertically ascend and descend. The space above the cutter head is increased, the grass clippings discharging efficiency is improved, then the rotating resistance of the cutter head and the grass clamping amount of the blades are reduced, the cutting force of the cutter head is guaranteed, and flat cutting is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of grass cutting equipment, and further relates to a cutter guard lifting structure and a grass cutter. BACKGROUND

[0002] The grass cutter is a mechanical tool for trimming lawns, vegetation and the like, and generally comprises a cutter, a blade, a grass cutting motor, a walking mechanism, a handrail, a control unit and the like.

[0003] In the industry, in order to ensure the safety of the grass cutter, a cutter guard is often added to cover the cutter. At present, the cutter guard of the grass cutter on the market is mostly installed on the shaft end of the grass cutting motor output shaft together with the cutter, and maintains a certain gap with the cutter. During use, the cutter guard is lifted synchronously with the cutter to perform real-time protection. The cut grass clippings are discharged to the ground through the gap between the cutter and the cutter guard. However, in the related art, since the cutter guard is mostly in a flat plate structure and has a small gap with the cutter, when the amount of grass clippings is large during the grass cutting process, the grass clippings are often accumulated on the cutter, increasing the rotating resistance of the cutter and the grass clippings amount of the blade, thereby affecting the cutting force of the cutter, making it difficult for the corresponding grass cutter to perform flat cutting, and there is room for improvement. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a cutter guard lifting structure and a grass cutter, which increase the space above the cutter, improve the discharge efficiency of the grass clippings, reduce the rotating resistance of the cutter and the grass clippings amount of the blade, ensure the cutting force of the cutter, and thus realize flat cutting.

[0005] The technical scheme provided by the application is as follows:

[0006] The application provides a cutter guard lifting structure, comprising:

[0007] a chassis;

[0008] a cutter rotatingly arranged below the chassis;

[0009] a first driving motor vertically arranged above the chassis, with an output shaft vertically penetrating the chassis from top to bottom and coaxially connected to the cutter;

[0010] a cutter guard detachably connected to the first driving motor housing through a connecting piece and vertically arranged below the chassis, for synchronous lifting relative to the cutter when the first driving motor drives the cutter to vertically lift, so as to be covered on the circumferential side of the cutter.

[0011] The cutting disc shield lifting structure provided by the application sets the cutting disc shield below the base disc by the connecting piece, instead of installing the cutting disc shield on the shaft end of the first driving motor output shaft, so that the cutting disc shield is arranged separately from the cutting disc, the space above the cutting disc is significantly increased, the discharge efficiency of grass clippings is improved, the rotation resistance of the cutting disc is reduced, the amount of grass clamped by the blade is reduced, and the cutting force of the cutting disc is effectively ensured, which is beneficial to the realization of flat cutting of the mower.

[0012] In some embodiments, the connecting piece comprises a bridge and a guide rod.

[0013] The bridge is detachably connected with the first driving motor shell and arranged on the periphery of the first driving motor shell; and the cutting disc shield is detachably connected with the bridge and arranged below the bridge.

[0014] The guide rod vertically penetrates the base disc and is in sliding connection with the base disc along the axis of the guide rod; and the two ends of the guide rod are detachably connected with the bridge and the cutting disc shield, respectively.

[0015] The cutting disc shield lifting structure provided by the application connects the cutting disc shield and the first driving motor shell by the bridge and the guide rod, so as to realize the lifting driving of the cutting disc shield by the first driving motor. On the one hand, the connecting structure is simple, the lifting action is stable, and the stability of the mower function is helped to be ensured. On the other hand, the production difficulty of the cutting disc shield lifting structure is also helped to be reduced, which is beneficial to the energy saving and cost reduction of enterprises.

[0016] In some embodiments, a guide pipe is arranged on the base disc, the guide pipe corresponds to the guide rod one by one, the guide rod penetrates the guide pipe along the axis of the guide rod and is in sliding connection with the guide pipe.

[0017] The guide pipe is used to increase the contact area of the guide rod and the base disc, improve the stability of the sliding of the guide rod relative to the base disc, and thus as far as possible avoid the probability of damage of the guide rod relative to the base disc, which is helpful to prolong the service life of the guide rod.

[0018] In some embodiments, the connecting piece further comprises a support block.

[0019] The guide rod extends into the support block from bottom to top and is detachably connected with the support block.

[0020] The end of the bridge away from the first driving motor shell horizontally extends into the support block and is fixedly connected with the support block.

[0021] The support block connecting bridge and the guide rod are detachably connected, the connecting structure is simple, production and use are convenient, and the cost investment of enterprises on the cutter guard lifting structure is reduced.

[0022] In some embodiments, the bridge and / or the guide rod and / or the support block are internally hollowed out.

[0023] The bridge and / or the guide rod and / or the support block are internally hollowed out, which helps to reduce the weight of the connecting piece, thereby improving the stability of the driving cutter guard lifting process, and helps to reduce the driving operation energy consumption, thereby further promoting energy saving and efficiency of enterprises.

[0024] In some embodiments, the cutter guard comprises a support plate and a guard plate, the guard plate is arranged at the end of the support plate away from the cutter, and is perpendicular to the support plate, so that the cutter guard is in an L-shaped structure.

[0025] The support plate is detachably fixedly connected with the bottom end of the guide rod through the locking piece.

[0026] The cutter guard is in an L-shaped structure, the cutter guard structure is simple, production and installation are convenient, and the cost investment of enterprises in the production and use of the cutter guard lifting structure is further reduced.

[0027] In some embodiments, the length direction of the cutter guard is parallel to the length direction of the support block.

[0028] The guide rod is provided with two guide rods on the support block, the two guide rods are arranged in parallel and are spaced apart, and are respectively located at two ends corresponding to the length direction of the support block.

[0029] The bridge is connected to the middle part of the length direction of the support block.

[0030] The cutter guard is connected by two guide rods, which helps to improve the installation stability of the cutter guard relative to the bridge, thereby ensuring the real-time protection of the cutter guard to the cutter.

[0031] In some embodiments, the cutter guard lifting structure further comprises a motor support, and the shell of the first driving motor is installed in the motor support.

[0032] The bridge is formed on the motor support.

[0033] The bottom plate is provided with a driving piece for driving the motor support to lift.

[0034] By means of the cutter head cover lifting structure provided in the application, the first driving motor shell is supported by the motor support, the bridge is supported by the motor support, and the cutter head cover is connected by the motor support, which helps to reduce the installation difficulty of the cutter head cover relative to the first driving motor shell, thereby effectively reducing the production cost of enterprises.

[0035] In some embodiments, the driving member comprises a screw rod and a second driving motor;

[0036] The screw rod is vertically arranged and threadedly matched with the motor support;

[0037] The second driving motor is mounted on one side of the motor support in the horizontal direction, and the output shaft of the second driving motor is in transmission connection with the screw rod;

[0038] The driving member further comprises a guide member, the guide member comprises a guide column, and the guide column is vertically arranged; a through hole is formed in the bridge corresponding to the guide column, and the guide column penetrates through the through hole and is in sliding fit with the inner wall of the through hole.

[0039] By means of the cutter head cover lifting structure provided in the application, the screw rod is threadedly matched with the motor support, and the guide column is in sliding fit with the inner wall of the through hole, so as to realize the vertical lifting driving of the motor support and the first driving motor thereon by the second driving motor, and the lifting structure is simple, which helps to significantly reduce the production cost of the cutter head cover lifting structure.

[0040] In another aspect, the application also provides a mower comprising the cutter head cover lifting structure as described above.

[0041] Compared with the prior art, the cutter head cover lifting structure and the mower provided in the application have at least one of the following beneficial effects:

[0042] 1. In the application, the cutter head cover and the first driving motor shell are connected by the connecting member, so that the cutter head cover is transferred from the shaft end of the first driving motor output shaft and is arranged separately from the cutter head, which realizes the real-time protection of the cutter head by the cutter head cover, significantly increases the space above the cutter head, improves the discharge efficiency of grass clippings, effectively reduces the rotation resistance of the cutter head, reduces the amount of grass clamped by the blade, and further stably ensures the cutting force of the cutter head, so that the corresponding mower can stably perform flat cutting.

[0043] 2. In the application, the first driving motor shell is supported by the motor support, the bridge is formed on the motor support, the cutter head cover is detachably arranged at the bottom end of the guide rod, and the bridge and the guide rod are connected by the supporting block, so as to realize the detachable arrangement of the cutter head cover on the first driving motor shell, the design form of the cutter head cover lifting structure is simple, the production and assembly are convenient, the cost investment of enterprises on the cutter head cover lifting structure is effectively saved, and the enterprises are beneficial to energy saving and cost reduction.

[0044] 3. The cutter guard is in L-shaped structure, which can effectively reduce the installation difficulty of the cutter guard at the bottom end of the guide rod, and further effectively promote the enterprise to reduce cost and increase benefit. BRIEF DESCRIPTION OF DRAWINGS

[0045] The above-mentioned characteristics, technical features, advantages and implementation ways of the present application will be further described in the following preferred embodiments in a clear and understandable manner combined with the drawings.

[0046] Figure 1 is the main embodiment of the present application, which is the overall setting form of the cutter guard lifting structure.

[0047] Figure 2 is the main embodiment of the present application, which is the overall structure of the chassis.

[0048] Figure 3 is the main embodiment of the present application, which is the overall structure of the driving member.

[0049] Figure 4 is the main embodiment of the present application, which is the overall structure of the motor support.

[0050] Figure 5 is the main embodiment of the present application, which is the overall structure of the cutter guard.

[0051] Figure 6 is the main embodiment of the present application, which is the overall structure of the support block.

[0052] BRIEF DESCRIPTION OF DRAWINGS

[0053] 1, chassis; 11, bottom plate; 111, guide pipe; 112, support column; 12, mounting frame; 121, cross beam; 1211, connecting lug; 122, support frame; 1221, vertical rod; 1222, connecting rod; 2, cutter; 3, first driving motor; 4, cutter guard; 41, support plate; 42, guard plate; 5, connecting member; 51, bridge; 511, through hole; 512, clamping block; 52, guide rod; 521, connecting structure; 53, support block; 531, mounting groove; 532, mounting hole; 6, motor support; 7, driving member; 71, screw rod; 711, driven gear; 72, second driving motor; 721, driving gear; 73, guide member; 8, locking member. DETAILED DESCRIPTION

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort, and other embodiments can also be obtained.

[0055] In order to make the drawings simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this document, "one" not only means "only one", but also means "more than one" situation.

[0056] As is known to all, the mower is composed of a cutter head, a blade, a mower motor, a walking mechanism, a handrail, a control unit and the like, and is a commonly used mechanical tool for trimming lawns, vegetation and the like. At present, the mower on the market is often equipped with a cutter head guard to cover the peripheral side of the cutter head to reduce the probability of cutter head injury and blade damage in order to ensure the safety of the mowing process. In the related art, the cutter head guard is mostly installed with the cutter head at the shaft end of the mower motor output shaft and maintains a certain gap with the cutter head; during actual mowing, the cutter head guard rises and falls synchronously with the cutter head to provide real-time protection; and the cut grass is discharged to the ground through the gap between the cutter head and the cutter head guard. However, for the related art described above, the inventors believe that since the cutter head guard is mostly provided in a flat plate structure and has a small gap with the cutter head, when the amount of grass cuttings is large during mowing, the grass cuttings often accumulate on the cutter head, increasing the rotating resistance of the cutter head and the amount of grass clamped by the blade, thereby affecting the cutting force of the cutter head and making it difficult for the corresponding mower to perform smooth cutting.

[0057] For this purpose, with reference to the drawings of the specification Figure 1 In one embodiment, a cutter head guard lifting structure is provided, which comprises a chassis 1, a cutter head 2 rotatably arranged below the chassis 1, a first driving motor 3 and a cutter head guard 4. The first driving motor 3 is vertically arranged on the chassis 1, and its output shaft vertically penetrates the chassis 1 from top to bottom and is coaxially connected to the cutter head 2. The cutter head guard 4 is detachably connected to the shell of the first driving motor 3 through a connecting piece 5 and is vertically arranged below the chassis 1. During use, the first driving motor 3 drives the cutter head 2 to vertically rise and fall, and at the same time, the cutter head guard 4 rises and falls synchronously with the shell of the first driving motor 3, and is real-time covered on the peripheral side of the cutter head 2 to achieve the effect of real-time protection.

[0058] In actual mowing operation, the output shaft of the first driving motor 3 rotates to drive the cutterhead 2 to rotate synchronously to perform mowing operation; when the cutting height is changed, the first driving motor 3 drives the cutterhead 2 to vertically ascend or descend relative to the chassis 1. Since the cutterhead guard 4 is connected with the shell of the first driving motor 3, the cutterhead guard 4 moves synchronously with the cutterhead 2, so as to be real-time covered on the circumferential side of the cutterhead 2.

[0059] In this way, the cutterhead guard 4 is arranged below the chassis 1 by the connecting piece 5, instead of being mounted on the shaft end of the output shaft of the first driving motor 3, so as to move the cutterhead guard 4 from above the cutterhead 2. While the cutterhead guard 4 is real-time covered on the cutterhead 2, the space above the cutterhead 2 is significantly increased, so as to improve the efficiency of the grass clippings discharged from above the cutterhead 2. In this way, the rotating resistance of the cutterhead 2 and the grass clamping amount of the blade are significantly reduced, so as to effectively ensure the cutting force of the cutterhead 2, and the corresponding mower can normally and evenly cut.

[0060] Based on the above embodiment, referring to Figure 1 , specifically, the cutterhead guard 4 lifting structure further comprises a motor support 6 vertically arranged on the chassis 1, and the chassis 1 is further provided with a driving piece 7 for driving the motor support 6 to ascend or descend. In this embodiment of the present application, the motor support 6 is adapted to the outer shape of the shell of the first driving motor 3, and the first driving motor 3 is detachably arranged in the mounting position.

[0061] Referring to Figure 1 and Figure 2 , the chassis 1 comprises a bottom plate 11 and a mounting frame 12. The bottom plate 11 is generally in the form of a rectangular plate, and the mounting frame 12 is arranged above the bottom plate 11 and detachably connected with the bottom plate 11. In this embodiment of the present application, the mounting frame 12 comprises a cross beam 121 and two support frames 122. The cross beam 121 is arranged parallel to the length direction of the bottom plate 11, and the two support frames 122 are arranged at the two ends of the length direction of the bottom plate 11. Any support frame 122 comprises a connecting rod 1222 and a vertical rod 1221. The connecting rod 1222 is arranged parallel to the width direction of the bottom plate 11, and the two ends of the cross beam 121 are connected with the two connecting rods 1222, respectively. The vertical rod 1221 comprises two vertical rods, which are arranged vertically at the two ends of the connecting rod 1222, respectively. In the embodiment of the present application, the bottom plate 11 is provided with a support column 112 corresponding to any vertical rod 1221, and any vertical rod 1221 is connected with the corresponding support column 112 by a fastener, so as to realize the assembly of the chassis 1.

[0062] In this embodiment of the present application, the fastener can be provided in the form of a fastening bolt, a lock, a buckle, etc., and the present application does not specifically limit the form of the fastener. Meanwhile, in this embodiment of the present application, the cross beam 121, the connecting rod 1222 and the vertical rod 1221 are integrally formed to improve the overall structural strength.

[0063] Furthermore, the motor support 6 is arranged above the bottom plate 11, and the mounting frame 12 is arranged around the periphery of the motor support 6.

[0064] Referring to Figure 2 With Figure 3 In this embodiment of the present application, the driving member 7 comprises a lead screw 71, a second driving motor 72 and a guide member 73. The lead screw 71 is vertically arranged, and sequentially penetrates the cross beam 121 and the motor support 6 from top to bottom, and is threadedly connected with the motor support 6. The cross beam 121 is formed with a connecting lug 1211 corresponding to the lead screw 71, and the housing of the second driving motor 72 is detachably fixedly connected with the mounting frame 12 through the connecting lug 1211. The output shaft of the second driving motor 72 is arranged in parallel with the lead screw 71. In order to facilitate the installation of the driving member 7, the end of the output shaft of the second driving motor 72 is arranged upward, and a driving gear 721 is coaxially connected with the end. Correspondingly, the upper end of the lead screw 71 is coaxially installed with a driven gear 711, and the driven gear 711 is engaged with the driving gear 721. The guide member 73 comprises a guide column, which is arranged in parallel with the lead screw 71. In this embodiment of the present application, the guide column penetrates the motor support 6, and the two ends of the guide column respectively extend into the cross beam 121 and the bottom plate 11, and are respectively detachably fixedly connected with the cross beam 121 and the bottom plate 11, so as to be supported between the bottom plate 11 and the mounting frame 12.

[0065] In actual application, after the second driving motor 72 is started, the output shaft of the second driving motor 72 drives the driving gear 721 to rotate coaxially. While the driving gear 721 rotates, the driven gear 711 and the lead screw 71 are synchronously rotated. Since the lead screw 71 is threadedly connected with the motor support 6, while the lead screw 71 rotates, the motor support 6 relatively slides vertically along the guide column, so as to drive the first driving motor 3 and the cutter head 2 to synchronously ascend and descend.

[0066] In this embodiment of the present application, referring to Figures 2 to 4 The connecting member 5 comprises a bridge 51 and a guide rod 52. The bridge 51 is formed on the motor support 6, and referring to Figure 2The two bridge frames 51 are each arranged on the opposite sides of the motor support 6 in the horizontal direction, that is, the bridge frame 51 is arranged on the side of the shell of the first driving motor 3 and detachably connected with the shell of the first driving motor 3. In the embodiment, the two bridge frames 51 are respectively arranged on the two ends of the bottom plate 11 in the length direction and are both arranged in parallel to the length direction of the bottom plate 11. In the embodiment, in order to ensure the stable lifting of the motor support 6, the guide column corresponds to the bridge frame 51. The through hole 511 is arranged on the guide column of any bridge frame 51, and the guide column vertically penetrates through the corresponding through hole 511 and is in sliding cooperation with the corresponding bridge frame 51.

[0067] In the embodiment of the application, the two bridge frames 51 are both substantially rectangular plate structures and are both arranged horizontally to facilitate the penetration of the guide column. In addition, the bridge frame 51 is integrally formed with the motor support 6 to further ensure the stability of the connection between the two and improve the overall structural strength. Of course, the bridge frame 51 can also be connected with the motor support 6 through clamping, locking and other forms. The specific connection form of the bridge frame 51 and the motor support 6 should not be regarded as a limitation on the protection scope of the application.

[0068] Of course, in the embodiment of the application, the number of bridge frames 51 is not limited to two, and only one, three, four or the like can be arranged as long as it can cooperate with the structure of the cutter guard 4 and stably support the cutter guard 4. The specific number of bridge frames 51 should not be regarded as a limitation on the protection scope of the application.

[0069] Referring to Figures 1 to 5 In the embodiment of the application, the guide rod 52 is vertically arranged, the upper end of the guide rod 52 is detachably connected with the bridge frame 51, the bottom end of the guide rod 52 penetrates through the bottom plate 11 from top to bottom, and then is detachably connected with the cutter guard 4 through the locking member 8. In addition, the guide rod 52 is in sliding cooperation with the bottom plate 11 along the axis of the guide rod 52.

[0070] In the embodiment of the application, referring to Figure 5 The cutter guard 4 includes a support plate 41 and a guard plate 42. The support plate 41 and the guard plate 42 are both arranged in parallel to the width direction of the bottom plate 11. The guard plate 42 is arranged on the end of the support plate 41 away from the cutter 2 and is perpendicular to the support plate 41, so that the cutter guard 4 has an L-shaped structure. The locking member 8 includes a locking bolt. The threaded end of the locking bolt penetrates through the support plate 41 from bottom to top and is screwed into the bottom end of the guide rod 52, so as to realize the detachable connection between the cutter guard 4 and the guide rod 52. Of course, in the embodiment of the application, the locking member 8 can also be provided in the form of clamping, buckling, locking and the like. The specific setting form of the locking member 8 should not be regarded as a limitation on the protection scope of the application.

[0071] In order to improve the stability of the sliding motion of the guide rod 52, referring to Figure 2 and Figure 5The bottom plate 11 is provided with a guide pipe 111 corresponding to any guide rod 52. Any guide rod 52 penetrates the corresponding guide pipe 111 along its own axis and is in sliding connection with the corresponding guide pipe 111, thereby improving the movement stability of the guide rod 52 and prolonging the service life of the guide rod 52.

[0072] Further, in order to facilitate the connection between the bridge 51 and the corresponding guide rod 52, in this embodiment of the present application, the connecting piece 5 further comprises a support block 53 corresponding to the bridge 51. Figures 1 to 3 The connecting piece 5 further comprises a support block 53 corresponding to the bridge 51. Figure 6 The support block 53 has a rectangular structure, and the length direction is parallel to the width direction of the bottom plate 11. Meanwhile, the lower side of the support block 53 is provided with an installation slot 531 corresponding to any guide rod 52. Any installation slot 531 is vertically arranged. During assembly, any guide rod 52 is inserted into the corresponding installation slot 531 from bottom to top and is detachably connected to the corresponding support block 53 through the connecting structure 521. In this embodiment of the present application, the connecting structure 521 comprises a screw. The screw is arranged above the support block 53 and corresponds to the installation slot 531. During assembly, after the top end of the guide rod 52 is inserted into the corresponding installation slot 531 from bottom to top, the threaded end of the screw penetrates the support block 53 from top to bottom and is inserted into the corresponding installation slot 531, and then is screwed into the corresponding guide rod 52, thereby achieving the detachable connection between the guide rod 52 and the support block 53.

[0073] In this embodiment of the present application, in order to ensure the stable connection between the cutter guard 4 and the bridge 51, two guide rods 52 are arranged on any support block 53. The two guide rods 52 are arranged in parallel and are spaced apart, and are respectively located at the two ends of the length direction of the corresponding support block 53. The bridge 51 is connected to the middle part of the length direction of the support block 53.

[0074] Specifically, referring to Figure 4 and Figure 6 , the middle part of the length direction of any support block 53 is provided with an installation hole 532. The installation hole 532 penetrates the corresponding support block 53 along the length direction of the bottom plate 11. The end of any bridge 51 away from the first driving motor 3 is formed with a clamping block 512. During assembly, any clamping block is inserted into the corresponding installation hole 532 and is fixedly clamped with the corresponding support block 53, thereby achieving the detachable connection between the bridge 51 and the support block 53.

[0075] In this embodiment of the present application, preferably, the inside of the bridge 51 and / or the guide rod 52 and / or the support block 53 is in a hollow structure, so as to reduce the weight of the connecting piece 5, thereby improving the stability of the cutter guard 4 lifting driving process, reducing the driving energy consumption, and promoting the energy saving and cost reduction of enterprises.

[0076] In one embodiment, a mower is also provided, which comprises the cutter guard 4 lifting structure of any of the above embodiments.

[0077] The implementation principle of the embodiment of the application is that during actual mowing operation, the second driving motor 72 is started to drive the lead screw 71 to rotate synchronously, and then drive the motor support 6 to vertically slide along the guide column to drive the first driving motor 3 to vertically lift; since the cutter head 2 is installed on the shaft end of the output shaft of the first driving motor 3, and the cutter head cover 4 is connected to the motor support 6, the cutter head cover 4 and the cutter head 2 are lifted synchronously with the first driving motor 3 to realize real-time protection. In this way, the cutter head cover 4 and the cutter head 2 are arranged separately, which not only ensures that the cutter head cover 4 protects the cutter head 2 in real time, but also increases the space above the cutter head 2 to improve the discharge efficiency of the grass clippings, thereby effectively reducing the rotating resistance of the cutter head 2, reducing the amount of grass clippings of the blade, and effectively ensuring the cutting force of the cutter head 2, so that the corresponding mower can realize normal and flat cutting. In addition, the corresponding cutter head cover 4 lifting structure is simple in whole, convenient to produce and assemble, effectively reduces the cost investment of enterprises on the cutter head cover 4 lifting structure of the mower, and is beneficial to energy saving and efficiency improvement.

[0078] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred embodiment of the application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and refinements can be made without departing from the principles of the application, and these improvements and refinements should also be regarded as the protection scope of the application.

Claims

1. A cutterhead shroud lifting structure, characterized by, It includes: The chassis; The cutter head is rotatably arranged below the chassis; The first drive motor is vertically arranged above the chassis, and the output shaft vertically penetrates the chassis from top to bottom and is coaxially connected with the cutter head; The cutter head cover is detachably connected with the first drive motor shell through the connecting piece and is vertically arranged below the chassis, and is used for synchronous lifting relative to the cutter head when the first drive motor drives the cutter head to vertically lift, so as to be real-time covered on the side of the cutter head.

2. The cutter head cover lifting structure according to claim 1, wherein the connecting piece comprises a bridge and a guide rod; the bridge is detachably connected with the first drive motor shell and is arranged on the side of the first drive motor shell; the cutter head cover is detachably connected with the bridge and is arranged below the bridge; the guide rod vertically penetrates the chassis and is slidably connected with the chassis along the axis of the guide rod; the two ends of the guide rod are detachably connected with the bridge and the cutter head cover respectively.

3. The cutter head cover lifting structure according to claim 2, wherein a guide pipe is arranged on the chassis, the guide pipe corresponds to the guide rod one by one, the guide rod penetrates the guide pipe along the axis of the guide rod and is slidably connected with the guide pipe.

4. The cutter head cover lifting structure according to claim 2 or 3, wherein the connecting piece further comprises a support block; the guide rod extends into the corresponding support block from bottom to top and is detachably connected with the support block; the end of the bridge away from the first drive motor shell horizontally extends into the support block and is fixedly connected with the support block.

5. The cutter head cover lifting structure according to claim 4, wherein the bridge and / or the guide rod and / or the support block are internally hollowed out.

6. The cutter head cover lifting structure according to any one of claims 2-3 and 5, wherein the cutter head cover comprises a support plate and a cover plate, the cover plate is arranged at the end of the support plate away from the cutter head and is perpendicular to the support plate, so that the cutter head cover is in L-shaped structure; the support plate is detachably connected with the bottom end of the guide rod through a locking piece.

7. The cutter head cover lifting structure according to claim 5, wherein the length direction of the cutter head cover is parallel to the length direction of the support block; two guide rods are arranged on the support block, the two guide rods are arranged in parallel and are located at the two ends of the length direction of the support block respectively; the bridge is connected to the middle part of the length direction of the support block.

8. The cutter head cover lifting structure according to any one of claims 2-3, 5 and 7, wherein the cutter head cover lifting structure further comprises a motor support, the shell of the first drive motor is installed in the motor support; the bridge is formed on the motor support; a driving piece for driving the motor support to lift is arranged on the chassis.

9. The cutter head cover lifting structure according to claim 8, wherein the driving piece comprises a lead screw and a second drive motor; the lead screw is vertically arranged and is threadedly matched with the motor support. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second driving motor is installed on one side of the motor support in the horizontal direction, and an output shaft of the second driving motor is in transmission connection with the screw rod. The driving member further comprises a guide member, the guide member comprises a guide column, and the guide column is vertically arranged; a through hole is formed in the bridge corresponding to the guide column, and the guide column penetrates through the through hole and is in sliding cooperation with the inner wall of the through hole.

10. A lawnmower characterised in that, The knife disc cover lifting structure comprises a lifting frame, a lifting motor, a lifting belt, a lifting pulley, a lifting rope, a lifting bracket, a lifting rod, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a lifting plate, a

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