Cutter head assembly for lawn vehicle and lawn vehicle

Abstract

The cutterhead assembly comprises a cutterhead and a connecting assembly used for connecting the cutterhead to a vehicle frame of the lawn vehicle, the connecting assembly comprises a suspension part and a rocker arm capable of swinging relative to the vehicle frame, one end of the suspension part is connected to the free end of the rocker arm, and the other end of the suspension part is connected to the free end of the rocker arm. The cutterhead is suspended at the other end of the suspension part through a vibration reduction assembly I; according to the cutterhead assembly for the lawn vehicle and the lawn vehicle, the cutterhead is connected to the suspension piece in a vibration reduction mode through the vibration reduction assembly I, so that vibration transmitted to the vehicle frame when the cutterhead is used can be attenuated, the driving experience of a user can be improved, meanwhile, the influence of vibration on a cutterhead connecting structure can be reduced, and the service life of the lawn vehicle is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to turf vehicle technical field, especially a cutterhead subassembly and turf vehicle for turf vehicle. BACKGROUND

[0002] The vibration generated in the motor or belt transmission process of the cutterhead is very big in the use process of the turf vehicle, when the user rides on the turf vehicle, the user can feel big vibration in the position of the seat, the use feeling and use comfort of the user are reduced, and the fatigue life of the cutterhead heightening mechanism and other connecting systems is affected.

[0003] Therefore, the cutterhead damping structure in the prior art needs to be improved, so that the vibration transmitted to the seat of the turf vehicle is smaller when the cutterhead works, the riding experience is improved, and the influence on other components is reduced due to the attenuation of the vibration, and the service life of the turf vehicle is prolonged. SUMMARY

[0004] Therefore, the cutterhead damping structure in the prior art needs to be improved, so that the vibration transmitted to the seat of the turf vehicle is smaller when the cutterhead works, the riding experience is improved, and the influence on other components is reduced due to the attenuation of the vibration, and the service life of the turf vehicle is prolonged.

[0005] The cutterhead subassembly for the turf vehicle comprises a cutterhead and a connecting assembly for connecting the cutterhead to the frame of the turf vehicle, the connecting assembly comprises a suspension piece and a swing arm that can swing relative to the frame, one end of the suspension piece is connected to the free end of the swing arm, and the cutterhead is suspended at the other end of the suspension piece through a damping assembly I.

[0006] Further, a hanging seat is arranged on the cutterhead, the hanging seat is provided with a suspension shaft, and the suspension shaft is suspended on the suspension piece through the damping assembly I.

[0007] Further, the damping assembly I comprises a damping bushing and an inner bushing, the inner bushing is sleeved on the outer peripheral wall of the suspension shaft, and the damping bushing is sleeved on the outer peripheral wall of the inner bushing.

[0008] Further, the outer peripheral wall of the damping bushing is inwardly recessed in the middle part to form a limiting groove, and one end of the suspension piece can be clamped in the limiting groove.

[0009] Further, a height adjustment driving assembly for driving the swing of the swing arm is further included, the height adjustment driving assembly comprises a height adjustment rotating shaft I and a height adjustment rotating shaft II, the swing arm comprises a swing arm I and a swing arm II, the swing arm I is connected with one end of the height adjustment rotating shaft I and the height adjustment rotating shaft II respectively, the swing arm II is connected with the other end of the height adjustment rotating shaft I and the height adjustment rotating shaft II respectively, and a connecting plate is arranged between the two swing arms II on the same side of the frame.

[0010] The height adjustment rotating shaft I and the height adjustment rotating shaft II are connected to the frame through a damping assembly II respectively.

[0011] Further, the damping assembly II comprises a bearing bush, a damping piece and a clamp, the bearing bush is wrapped on the outer wall of the height adjustment rotating shaft I and the height adjustment rotating shaft II respectively, the damping piece is wrapped on the outer side of the bearing bush, and the clamp is wrapped on the outer side of the damping piece and fixedly connected with the longitudinal beam of the frame.

[0012] Further, the height adjustment driving assembly further comprises a height adjustment rod and a gear plate, the gear plate is arranged on the vehicle body of the lawn mower, one end of the height adjustment rod penetrates through the gear plate and is located above the gear plate, and the other end of the height adjustment rod is connected with one of the swing arms II and used for driving the swing of the swing arm I and the swing arm II.

[0013] Further, the gear plate is provided with a toothed structure, and the gear plate is made of engineering plastic.

[0014] Further, the suspension piece is a hanging ring or a ring chain.

[0015] The lawn mower comprises the cutter disc assembly for the lawn mower.

[0016] The lawn mower has the advantages that the cutter disc is mounted on the frame through the connecting assembly, and the cutter disc is connected with the connecting assembly in a damping mode, so that the vibration transmitted to the frame during the operation of the cutter disc can be damped, the driving experience and comfort are improved, the production cost is relatively low, the influence of the vibration on the connecting structure of other parts of the cutter disc can be effectively reduced, the fatigue life of the cutter disc is prolonged, and the service life of the lawn mower is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and embodiments:

[0018] Figure 1 The utility model discloses a structure schematic view;

[0019] Figure 2 It is another structure schematic view of the perspective; Figure 1

[0020] Figure 3 ​Structure diagram of height adjusting rotating shaft II;

[0021] Figure 4 Structure diagram of height adjusting rotating shaft II, Figure 2 Sectional view at A in the middle;

[0022] Figure 5 Structure diagram of height adjusting rotating shaft II, Figure 2 Sectional view at B in the middle;

[0023] Wherein, the above-mentioned drawings contain the following reference signs:

[0024] 1. frame; 101. longitudinal beam; 2. cutter head; 201. hanging seat; 3. suspension; 4. height adjusting rotating shaft I; 5. height adjusting rotating shaft II; 6. height adjusting rod; 7. gear plate; 8. rocker arm II; 801. connecting lug; 9. connecting plate; 10. rocker arm I; 11. suspension shaft; 12. inner bush; 13. damping bush; 14. damping member; 15. bearing bush; 16. hoop; 17. mounting part. DETAILED DESCRIPTION

[0025] Figure 1 Structure diagram of height adjusting rotating shaft II, Figure 2 Structure diagram of height adjusting rotating shaft II, Figure 1 Structure diagram of height adjusting rotating shaft II, Figure 3 Structure diagram of height adjusting rotating shaft II, Figure 4 Structure diagram of height adjusting rotating shaft II, Figure 2 Sectional view at A in the middle, Figure 5 Structure diagram of height adjusting rotating shaft II, Figure 2 Sectional view at B in the middle, Figures 1-5As shown: The blade assembly for a lawnmower in this embodiment includes a blade 2 and a connecting assembly for connecting the blade 2 to the frame 1 of the lawnmower. The connecting assembly includes a suspension member 3 and a rocker arm that can swing relative to the frame 1. One end of the suspension member 3 is connected to the free end of the rocker arm, and the blade 2 is suspended from the other end of the suspension member 3 by a vibration damping assembly I. In this structure, the number of connecting assemblies can be set in multiple sets according to usage needs. The structure of the blade 2 is an application of existing technology and will not be described in detail here. The suspension member 3 can be a hanging ring or a ring chain, etc. The blade 2 is connected to the free end of the rocker arm through the suspension member 3. When the rocker arm is subjected to external force, the rocker arm swings relative to the lawnmower in the front-back direction. Through the swing of the rocker arm (the swing axis is an axis in the left-right direction relative to the lawnmower), the blade 2 is driven to move up and down (up and down are in the up and down direction relative to the lawnmower), thereby adjusting the height of the blade 2 off the ground to adapt to different mowing needs. The cutter head 2 is suspended from one end of the suspension component 3 (the lower end of the suspension component 3) by the vibration damping component I. The upper end of the suspension component 3 is connected to the rocker arm. The upper end of the suspension component 3 can be directly suspended from the rocker arm or connected to the rocker arm by bolts, etc. The vibration damping component I can be a structure such as the vibration damping bushing 13, which can attenuate the vibration transmitted to the frame 1 when the cutter head 2 is working. Compared with the existing technology of setting the vibration damping device under the seat of the lawn wagon, the production cost is lower, and it is easier to install and maintain. At the same time, it can reduce the vibration of the connection structure of the cutter head 2, improve the fatigue life of these components, and extend the service life of the lawn wagon.

[0026] In this embodiment, the cutter head 2 is provided with a mounting bracket 201, and the mounting bracket 201 is provided with a suspension shaft 11. The suspension shaft 11 is suspended from the suspension member 3 by a vibration damping component I. In this structure, the number of mounting brackets 201 and the number of suspension members 3 are consistent. The number of mounting brackets 201 and suspension members 3 can be set according to usage requirements, such as... Figure 1 The aforementioned structure includes four mounting brackets 201 and four suspension components 3. The mounting bracket 201 has a U-shaped open slot structure, and the suspension shaft 11 can be a bolt or similar structure. The mounting bracket 201 has two through holes for the suspension shaft 11 to pass through. The suspension shaft 11 passes through the U-shaped open slot and is fixed to the mounting bracket 201 with a nut. The vibration damping component I is set on the outer circumference of the suspension shaft 11. The vibration damping component I can be a vibration damping bushing 13 or similar structure. Thus, the cutter disc 2 is connected to the suspension component 3 for vibration damping, which can attenuate the vibration transmitted to the frame 1 when the cutter disc 2 is working, thereby reducing the vibration transmitted to the lawnmower seat and improving the driving experience. In this structure, by setting the vibration damping component I at the connection between the cutter disc 2 and the suspension component 3, the overall structure is simple, the vibration damping effect is good, and the cost is significantly reduced compared to the existing technology.

[0027] In this embodiment, the vibration damping component I includes a vibration damping bushing 13 and an inner bushing 12. The inner bushing 12 is sleeved on the outer peripheral wall of the suspension shaft 11, and the vibration damping bushing 13 is sleeved on the outer peripheral wall of the inner bushing 12. The vibration damping bushing 13 and the mounting bracket 201 are clearance-fitted. The vibration damping bushing 13 is made of plastic. By setting the vibration damping bushing 13 and the inner bushing 12, the vibration damping effect can be improved.

[0028] In this embodiment, the middle portion of the outer peripheral wall of the vibration damping bushing 13 is recessed inward to form a limiting groove, and one end of the suspension member 3 can be engaged with the limiting groove. The middle portion of the outer peripheral wall of the vibration damping bushing 13 (the contact point between the suspension member 3 and the vibration damping bushing 13) is recessed inward to form a limiting groove, such as... Figure 4 As shown, the limiting groove is an arc-shaped groove. The suspension 3 is subjected to the gravity of the cutter head 2. The lower end of the suspension 3 can be engaged in the limiting groove, thereby limiting the suspension 3 in the left and right directions (relative to the left and right directions of the lawnmower). At the same time, it can prevent the suspension 3 from directly contacting the inner wall of the bracket 201 when the cutter head 2 is working, thus reducing noise.

[0029] In this embodiment, a height adjustment drive assembly for driving the rocker arm to swing is also included. The height adjustment drive assembly includes a height adjustment shaft I4 and a height adjustment shaft II5. The rocker arm includes a rocker arm I10 and a rocker arm II8. The rocker arm I10 is connected to one end of the height adjustment shaft I4 and the height adjustment shaft II5 respectively. The rocker arm II8 is connected to the other end of the height adjustment shaft I4 and the height adjustment shaft II5 respectively. A connecting plate 9 is provided between the two rocker arms II8 located on the same side of the frame 1.

[0030] Specifically, height adjustment axles I4 and II5 are spaced apart along the front-to-back direction of the lawnmower. Height adjustment axles I4 and II5 have the same structure, such as... Figure 3 The diagram shows the structure when the height adjustment shaft II5 is connected to rocker arms I10 and II8. There are two rocker arms I10 and II8. Rocker arms I10 and II8 are provided at both ends of the height adjustment shaft I4 and II5, respectively. Rocker arms I10 and II8 can be welded to the height adjustment shaft I4 and II5. Rocker arms I10 and II8 form a portal structure with the height adjustment shaft I4 and II5, respectively. The two rocker arms II8 located on the left side of the frame 1 (relative to the left and right direction of the lawnmower) are connected by a connecting plate 9, so that the height adjustment shaft I4 and II5 form an integral structure. Rocker arm I10 is a plate structure, and rocker arm II8 is an L-shaped structure.

[0031] The height adjustment shafts I4 and II5 are respectively connected to the frame 1 via vibration damping assembly II. The height adjustment shafts I4 and II5 are respectively connected to the longitudinal beam 101 of the frame 1 via vibration damping assembly II, thereby further attenuating the vibration transmitted to the frame 1 when the cutter head 2 is working, and further improving the vibration damping effect.

[0032] In this embodiment, the vibration damping assembly II includes a bearing shell 15, a damping element 14, and a clamp 16. The bearing shell 15 covers the outer walls of the height adjustment shaft I 4 and the height adjustment shaft II 5, respectively. The damping element 14 covers the outer side of the bearing shell 15, and the clamp 16 covers the outer side of the damping element 14 and is fixedly connected to the longitudinal beam 101 of the frame 1. In this structure, there are four sets of vibration damping assemblies II. The height adjustment shaft I 4 and the height adjustment shaft II 5 are respectively connected to the two longitudinal beams 101 of the frame 1 through two sets of vibration damping assemblies II. The bearing shell 15 covers the outer walls of the height adjustment shaft I 4 and the height adjustment shaft II 5, the damping element 14 covers the outer wall of the bearing shell 15, and the damping element 14 is a buffer sleeve, generally made of rubber. The clamp 16 covers the outer side of the damping element 14 and is fixed to the longitudinal beam 101 of the frame 1 (the longitudinal beam 101 has mounting holes) by bolts and nuts. The clamp 16 is also provided. 6 can limit the vibration damping component 14 and bearing bush 15. The height adjustment shaft I 4 and height adjustment shaft II 5 are provided with annular limiting protrusions corresponding to the vibration damping component II, which are used to limit one end of the vibration damping component II. The bearing bush 15 is a split structure. In this structure, there are two bearing bushes 15, but other numbers are also possible. The bearing bush 15 is clearance-fitted with the height adjustment shaft I 4 and height adjustment shaft II 5. The clamp 16 is interference-fitted to the vibration damping component 14 and bearing bush 15, thereby preventing the height adjustment shaft I 4 and height adjustment shaft II 5 from moving left and right.

[0033] In this embodiment, the height adjustment drive assembly further includes a height adjustment lever 6 and a gear plate 7. The gear plate 7 is disposed on the body of the lawnmower. One end of the height adjustment lever 6 passes through the gear plate 7 and is located above the gear plate 7. The other end of the height adjustment lever 6 is connected to one of the rocker arms II 8 for driving the rocker arms I 10 and II 8 to swing. The height adjustment lever 6 is connected to the rocker arm II 8 disposed on the left side of the height adjustment shaft II 5. The user operates the height adjustment lever 6 (swinging relative to the lawnmower in the forward and backward and left and right directions) to drive the rocker arm II 8 to swing. The rocker arm II 8 drives the height adjustment shaft II 5 to rotate (while the rocker arm I 10 disposed on the right side of the height adjustment shaft is driven to swing), and through the connecting plate 9, drives the rocker arm II 8 disposed on the left side of the height adjustment shaft I 4 to swing, thereby driving the height adjustment shaft I 4 to rotate (while the rocker arm I 10 disposed on the right side of the height adjustment shaft I 4 is driven to swing). The connecting plate 9, rocker arm I 10, and rocker arm II 8 are generally connected by bolts. The height adjustment rod 6 is provided with a connecting part (a rod-shaped structure that forms a T-shaped structure with the height adjustment rod 6). The rocker arm II 8 is provided with a connecting lug 801 that cooperates with the connecting part. The connecting part is connected to the connecting lug 801 through a rotating shaft, and a torsion spring is provided on the connecting part. The connection structure between the height adjustment rod 6 and the rocker arm II 8 is an application of existing technology and will not be described in detail here. Through the cooperation of the gear plate 7 and the height adjustment rod 6, the different heights of the cutter head 2 from the ground can be adjusted.

[0034] In this embodiment, the gear shift plate 7 is provided with a toothed structure, and the gear shift plate 7 is made of engineering plastic. By providing the toothed structure on the gear shift plate 7, the height adjustment lever 6 can engage with the corresponding position of the toothed structure after each adjustment of the blade disc 2. The gear shift plate 7 is made of engineering plastic, which, compared to the metal gear shift plates in the prior art, further reduces vibration and improves the user experience.

[0035] In this embodiment, the suspension component 3 is a hanging ring or a ring chain. The rocker arm has a mounting portion 17 corresponding to the ring component. The mounting portion 17 is generally a cylindrical structure. The suspension component 3 is hung on the mounting portion 17 during installation. Since the suspension component 3 is a hanging ring or a ring chain, it can buffer the vibration transmitted to the frame 1 when the cutter head 2 is impacted by an external force during operation.

[0036] The lawn cart of this embodiment includes the aforementioned cutterhead assembly for lawn carts.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cutterhead assembly for a lawnmower, characterized in that: The device includes a cutter head and a connecting assembly for connecting the cutter head to the frame of a lawnmower. The connecting assembly includes a suspension member and a rocker arm that can swing relative to the frame. One end of the suspension member is connected to the free end of the rocker arm, and the cutter head is suspended from the other end of the suspension member by a vibration damping assembly I.

2. The cutterhead assembly for a lawnmower according to claim 1, characterized in that: The cutter head is provided with a mounting bracket, the mounting bracket is provided with a suspension shaft, and the suspension shaft is suspended from the suspension component by a vibration damping assembly I.

3. The cutterhead assembly for a lawnmower according to claim 2, characterized in that: The vibration damping component I includes a vibration damping bushing and an inner bushing. The inner bushing is sleeved on the outer peripheral wall of the suspension shaft, and the vibration damping bushing is sleeved on the outer peripheral wall of the inner bushing.

4. The cutter head assembly for a lawnmower according to claim 3, characterized in that: The middle part of the outer peripheral wall of the vibration damping bushing is recessed inward to form a limiting groove, and one end of the suspension member can be engaged in the limiting groove.

5. The cutter head assembly for a lawnmower according to claim 1, characterized in that: It also includes a height adjustment drive assembly for driving the rocker arm to swing, the height adjustment drive assembly includes a height adjustment shaft I and a height adjustment shaft II, the rocker arm includes a rocker arm I and a rocker arm II, the rocker arm I is connected to one end of the height adjustment shaft I and the height adjustment shaft II respectively, the rocker arm II is connected to the other end of the height adjustment shaft I and the height adjustment shaft II respectively, and a connecting plate is provided between the two rocker arms II located on the same side of the frame; The height adjustment shaft I and height adjustment shaft II are respectively connected to the vehicle frame through the vibration damping assembly II.

6. The cutterhead assembly for a lawnmower according to claim 5, characterized in that: The vibration damping assembly II includes a bearing shell, a damping element, and a clamp. The bearing shell covers the outer wall of the height adjustment shaft I and the height adjustment shaft II, respectively. The damping element covers the outer side of the bearing shell, and the clamp covers the outer side of the damping element and is fixedly connected to the longitudinal beam of the frame.

7. The cutterhead assembly for a lawnmower according to claim 5, characterized in that: The height adjustment drive assembly also includes a height adjustment lever and a gear plate. The gear plate is disposed on the body of the lawnmower. One end of the height adjustment lever passes through the gear plate and is located above the gear plate. The other end of the height adjustment lever is connected to one of the rocker arms II for driving rocker arms I and II to swing.

8. The cutter head assembly for a lawnmower according to claim 7, characterized in that: The gear shift plate has a toothed structure and is made of engineering plastic.

9. The cutter head assembly for a lawnmower according to claim 1, characterized in that: The suspension component is a hanging ring or a ring chain.

10. A lawnmower, characterized in that: Includes the cutter head assembly for lawnmowers as described in any one of claims 1-9.

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