Cutter head lifting device of mowing machine

Abstract

The utility model relates to a cutter head lifting device of a mower. The device comprises a parallelogram connecting rod mechanism, an operation assembly, a gear assembly and a driving rod. The parallelogram connecting rod mechanism comprises a front connecting rod and a rear connecting rod; according to the utility model, the operation assembly, the gear assembly and the driving rod are added; the operation assembly acts on the parallelogram mechanism through the driving rod to drive the cutter head to ascend and descend. The height of the cutter head is locked through the gear assembly; in the walking process of the mower, resistance borne by the cutter head is borne by the gear assembly; the bearing capacity of the gear assembly is high, and the height of the cutter head is more stable after the cutter head ascends and descends.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mower, in particular to a mower cutterhead lifting device. BACKGROUND

[0002] In the mower, the lifting cutterhead is a cutterhead that can freely adjust height to adapt to different height lawns and improve the mowing efficiency and quality. The utility model patent adjustable cutterhead height's self -moving mower robot of announcement number CN209057533U and the utility model patent a wheeled liftable cutterhead mower of announcement number CN212064908U both disclose the device that drives the cutterhead to lift: the height adjusting device in CN209057533U and the lifting motor in CN212064908U.

[0003] In CN209057533U, the height adjusting device 1 is a parallelogram link structure, comprising two connecting rods 1-1, a connecting rod 1-2 and an electric push rod 1-3; the electric push rod 1-3 acts on the connecting rod 1-1, the connecting rod 1-2 follows, drives the mower to lift;

[0004] In CN212064908U, the lifting motor 30 is installed with a gear 31; the cutterhead driving motor 20 shell is installed with the vertical rack 21 that is engaged with the gear 31; the sliding part and the cooperation part are mutually matched, and the lifting of the cutterhead is provided with the guide.

[0005] The two kinds of mower cutterhead lifting devices make the cutterhead fixed at the corresponding height by locking the electric push rod 1-3 and the lifting motor 30 respectively.

[0006] During the walking process of the mower, the resistance suffered by the cutterhead is finally applied to the electric push rod 1-3 or the lifting motor 30, so that the electric push rod 1-3 and the lifting motor 30 are prone to fatigue damage; once the electric push rod 1-3 and the lifting motor 30 are damaged, the cutterhead directly falls to the ground, causing damage. UTILITY MODEL CONTENTS

[0007] The utility model aims at solving the above-mentioned problems and provides a mower cutterhead lifting device.

[0008] The utility model discloses a technical scheme is: a mower cutterhead lifting device includes parallelogram linkage of connecting car frame and cutterhead, operating assembly, gear component, drive rod, the parallelogram linkage includes two front connecting rods and two rear connecting rods, just like the height adjusting device in the authorized announcement no. CN209057533U, the upper and lower ends of front connecting rod are hinged with car frame and cutterhead respectively at the front end of car frame, the upper and lower ends of rear connecting rod are hinged with car frame and cutterhead respectively at the rear end of car frame, two front connecting rods and two rear connecting rods are the structure that is about cutterhead symmetrical setting, in this way, cutterhead can smoothly lift, operating assembly includes operating lever, back -and -forth spring, axle, auxiliary operating lever, linkage, gear component includes the arc gear plate with operating lever lower end as the center, the arc gear plate upper end is uniformly distributed tooth mouth, every tooth mouth corresponds the height of cutterhead lifting, operating lever lower end is hinged with car frame, and operating lever lower part is equipped with with back -and -forth spring lower end meets fixed plate, operating lever middle part is equipped with the sliding long hole of axial direction, operating lever middle part rear side extends the connecting plate outward, connecting plate upper end rear side is equipped with the sliding groove perpendicular to operating lever axis, and connecting plate lower end passes through drive rod and is driven to be connected with rear connecting rod, and the rear end of linkage is equipped with the sliding axle that cooperates with sliding groove, axle penetrates linkage front end, and sliding long hole is slidably connected, and the upper end of back -and -forth spring meets with linkage front end, and the end of operating lever upper end exceeds linkage and is matched with tooth mouth, and operating lever upper end is equipped with the operating handle of transverse, and the upper end of auxiliary operating lever is equipped with the grip of transverse, and grip sets up operating handle front, and auxiliary operating lever lower end meets with linkage, and operating lever upper end can be deflected forward and backward, changes the direction of axle, also makes rear connecting rod deflection through drive rod, finally leads to the lifting of cutterhead, when operating, need palm to resist operating handle, four fingers tightly hold the grip of auxiliary operating lever, make sliding axle move backward along sliding groove, and the sliding axle that moves backward is through linkage and acts on axle, makes axle lift along operating lever axial direction, and then separates tooth mouth range, in this way, operating lever can be deflected correspondingly, when operating lever is deflected to corresponding angle, namely, cutterhead lifts to the appropriate height, palm still resists operating handle, but four fingers release grip, back -and -forth spring acts on linkage, makes sliding axle move forward, and axle moves down, and axle is clamped into corresponding tooth mouth, and cutterhead height is locked.

[0009] Preferably, the mower cutterhead lifting device further comprises a transverse synchronous shaft, a swing arm, a turnover rod, and a connecting rod. The swing arm is fixedly connected to the end of the synchronous shaft at the rear end and hingedly connected to the end of the drive rod at the front end. The turnover rods are symmetrically arranged on both sides of the synchronous shaft. The turnover rods are fixedly connected to the synchronous shaft at the rear ends and hingedly connected to the connecting rod at the front ends. The front end of the connecting rod is hingedly connected to the lower part of the rear connecting rod. The deflected operating lever acts on the front end of the swing arm through the drive rod, causing the swing arm to swing forward and backward. The swinging swing arm acts on the turnover rod through the synchronous shaft, and then acts on the rear connecting rod through the turnover rod, driving the cutterhead to lift.

[0010] Furthermore, the front end of the connecting rod is hinged to the lower part of the rear connecting rod via a pin; the lower end of the connecting rod is provided with an axially elongated hole A; the pin passes through this axially elongated hole A; under normal circumstances, the pin rests at the lowest end of the axially elongated hole A; when the lawn is uneven or there are obstacles, the pin moves upward along the axially elongated hole A, causing the cutter head to rise adaptively, so as to avoid the cutter head from colliding with the ground.

[0011] Furthermore, the lawnmower blade lifting device also includes an adjusting component; this adjusting component includes a connecting screw, and two stacked plates, A and B; the rear end of plate A is hinged to the front end of the flipping rod; the front end of plate A has a threaded hole; the rear end of plate B has an axially elongated hole B corresponding to the threaded hole; the connecting screw passes through the axially elongated hole B and engages with the threaded hole; by changing the position of the connecting screw on the axially elongated hole B, the overall length of the adjusting component can be changed, thereby leveling the blade and giving the blade a better mowing effect; the front end of plate B has an axially elongated hole C that engages with a pin, so that the blade can be raised with a certain degree of freedom according to the unevenness or obstacles of the lawn, protecting the blade.

[0012] Furthermore, the lawnmower blade lifting device also includes a gas spring; one end of the gas spring is hinged to the frame and the other end is hinged to the front end of the swing arm; the gas spring can resist the gravity of the blade and help the operating lever drive the swing arm to swing, making the operating lever easier to operate.

[0013] Preferably, there are two arc-shaped stop plates; the two arc-shaped stop plates are arranged side by side; both ends of the locking shaft extend from both sides of the linkage and engage with the teeth of the two arc-shaped stop plates; the locking state of the operating lever is more stable.

[0014] Preferably, the linkage includes two side plates, a curved plate corresponding to the operating lever, and a fixing screw; the two side plates are symmetrically arranged about the curved plate; the sliding shaft is fixed to the rear end of the side plate; the retaining shaft passes through the front end of the side plate and the upper part of the curved plate; the return spring is connected to the lower end of the curved plate through the fixing screw; the curved plate and the side plate move independently, and when the side plate deflects relative to the sliding shaft, the curved plate does not need to deflect with it, and the return spring does not need to be overstretched, thereby protecting the life of the return spring.

[0015] Furthermore, the fixing screw, return spring, and fixing plate are located at the front end of the operating lever to reduce the deflection of the return spring during extension and protect the service life of the return spring.

[0016] Furthermore, the lower end of the auxiliary operating lever connects to the inner side of the side plate; the middle part of the auxiliary operating lever is folded forward; in this way, the auxiliary operating lever can only deflect at a very small angle along the operating lever; making it easy for people to grip the lever.

[0017] Preferably, the gear shift assembly also includes a protective housing; the top of the protective housing has a notch that corresponds to the travel of the operating lever; the upper end of the operating lever protrudes from the notch; the protective housing protects the gear shift assembly.

[0018] The mower cutterhead lifting device has the following advantages.

[0019] (1) The utility model discloses an operation subassembly, a gear subassembly and a driving rod are added, the operation subassembly is acted on parallelogram mechanism through the driving rod, and the cutterhead is driven to lift, the cutterhead height is locked through the gear subassembly, the cutterhead resistance is borne by the gear subassembly during the walking of the mower, the bearing capacity of the gear subassembly is higher, and the height after the cutterhead lifting is more stable.

[0020] (2) The gas spring of the utility model can resist the gravity of the cutterhead, help the operating rod to drive the swing arm to swing, and make the operating rod more labor-saving to operate. DRAWINGS

[0021] Figure 1 It is the installation schematic of the mower cutterhead lifting device of the utility model Figure 1 ;

[0022] Figure 2 It is the I enlarged view of Figure 1 ;

[0023] Figure 3 It is the installation schematic of the mower cutterhead lifting device of the utility model Figure 2 ;

[0024] Figure 4 It is the II enlarged view of Figure 3 ;

[0025] Figure 5 It is the three-dimensional view of the mower cutterhead lifting device of the utility model after being connected with the cutterhead Figure 1 ;

[0026] Figure 6 It is the three-dimensional view of the mower cutterhead lifting device of the utility model after being connected with the cutterhead Figure 2 ;

[0027] Figure 7 It is the three-dimensional view of the adjusting piece

[0028] Figure 8 It is the A-A cross-sectional view of Figure 7 ;

[0029] Figure 9 It is the three-dimensional view of the gear subassembly

[0030] Figure 10 It is the three-dimensional view of the operation subassembly

[0031] Figure 11 It is the B-B cross-sectional view of Figure 10 ;

[0032] Figure 12is Figure 11 C-C sectional view of the;

[0033] Figure: 01. frame, 02. cutter head,

[0034] 11. front connecting rod, 12. rear connecting rod, 21. operating lever, 211. fixed plate, 212. sliding long hole, 213. connecting plate, 2131. sliding groove, 214. operating handle, 22. return spring, 23. clamping shaft, 24. auxiliary operating lever, 241. grip lever, 25. linkage, 251. sliding shaft, 252. side plate, 253. bent plate, 254. fixing screw, 31. arc-shaped gear plate, 311. tooth opening, 32. protective shell, 321. notch, 4. driving rod, 5. synchronous shaft, 6. swing arm, 7. turnover lever, 8. connecting rod, 81. axial long hole A, 9. adjusting piece, 91. connecting screw, 92. plate A, 921. threaded hole, 93. plate B, 931. axial long hole B, 932. axial long hole C, 10. gas spring. DETAILED DESCRIPTION

[0035] Example one: see Figures 1-12The mowing machine cutter head lifting device comprises a parallelogram linkage connecting the vehicle frame 01 and the cutter head 02, an operation assembly, a gear assembly, and a driving rod 4. The parallelogram linkage comprises two front connecting rods 11 and two rear connecting rods 12. The upper and lower ends of the front connecting rod 11 are hingedly connected to the vehicle frame 01 and the cutter head 02 at the front end of the vehicle frame 01, respectively. The upper and lower ends of the rear connecting rod 12 are hingedly connected to the vehicle frame 01 and the cutter head 02 at the rear end of the vehicle frame 01, respectively. The two front connecting rods 11 and the two rear connecting rods 12 are symmetrically arranged about the cutter head 02. In this way, the cutter head 02 can be smoothly lifted. The operation assembly comprises an operation rod 21, a return spring 22, a clamping shaft 23, an auxiliary operation rod 24, and a linkage 25. The gear assembly comprises an arc-shaped gear plate 31 with the lower end of the operation rod 21 as the center. The upper end of the arc-shaped gear plate 31 is uniformly provided with tooth openings 311. Each tooth opening 311 corresponds to a height of the cutter head 02. The lower end of the operation rod 21 is hingedly connected to the vehicle frame 01. The lower part of the operation rod 21 is provided with a fixed plate 211 connected to the lower end of the return spring 22. The middle part of the operation rod 21 is provided with an axial sliding long hole 212. The middle part of the operation rod 21 extends outwardly to the rear side to form a connecting plate 213. The upper end of the connecting plate 213 is provided with a sliding groove 2131 perpendicular to the axis of the operation rod 21. The lower end of the connecting plate 213 is connected to the rear connecting rod 12 through the driving rod 4. The rear end of the linkage 25 is provided with a sliding shaft 251 matched with the sliding groove 2131. The clamping shaft 23 penetrates through the front end of the linkage 25 and is in sliding fit with the sliding long hole 212. The front end of the linkage 25 is connected to the upper end of the return spring 22. The end of the operation rod 21 beyond the linkage 25 is matched with the tooth opening 311. The upper end of the operation rod 21 is provided with a transverse operation handle 214. The upper end of the auxiliary operation rod 24 is provided with a transverse handle 241. The handle 241 is arranged in front of the operation handle 214. The lower end of the auxiliary operation rod 24 is connected to the linkage 25. The upper end of the operation rod 21 can be deflected forward and backward to change the position of the clamping shaft 23, and also deflect the rear connecting rod 12 through the driving rod 4, finally causing the lifting of the cutter head 02. During operation, the palm needs to be pressed against the operation handle 214, and the four fingers need to be tightly gripped around the handle 241 of the auxiliary operation rod 24 to move the sliding shaft 251 backward along the sliding groove 2131. The backward sliding shaft 251 acts on the clamping shaft 23 through the linkage 25 to lift the clamping shaft 23 along the axis of the operation rod 21, and then disengage from the range of the tooth opening 311. In this way, the operation rod 21 can be deflected correspondingly. When the operation rod 21 is deflected to a corresponding angle, i.e., the cutter head 02 is lifted to a suitable height, the palm is still pressed against the operation handle 214, but the four fingers are released from the handle 241. The return spring 22 acts on the linkage 25 to move the sliding shaft 251 forward, and the clamping shaft 23 moves downward. The clamping shaft 23 is clamped into the corresponding tooth opening 311. The height of the cutter head 02 is locked.

[0036] Compared with the prior art, this utility model adds an operating component, a gear shift component, and a drive rod 4; the operating component acts on the parallelogram mechanism through the drive rod 4 to drive the blade disc 02 to rise and fall; the gear shift component locks the height of the blade disc 02; during the movement of the lawnmower, the resistance experienced by the blade disc 02 is borne by the gear shift component; the gear shift component has a high bearing capacity, and the height of the blade disc 02 after rising and falling is more stable.

[0037] The lawnmower blade lifting device also includes a horizontal synchronous shaft 6, a swing arm 6, a tilting rod 7, and a connecting rod 8; the rear end of the swing arm 6 is fixedly connected to the end of the synchronous shaft 6, and the front end is hinged to the end of the drive rod 4; the tilting rod 7 is symmetrically arranged on both sides of the synchronous shaft 6; the rear end of the tilting rod 7 is fixedly connected to the synchronous shaft 6, and the front end is hinged to the rear end of the connecting rod 8; the front end of the connecting rod 8 is hinged to the lower part of the rear connecting rod 12; the deflection operating rod 21 acts on the front end of the swing arm 6 through the drive rod 4, causing the swing arm 6 to swing back and forth; the swinging swing arm 6 acts on the tilting rod 7 through the synchronous shaft 6, and then acts on the rear connecting rod 12 through the tilting rod 7, driving the blade 02 to rise and fall.

[0038] The front end of the connecting rod 8 is hinged to the lower part of the rear connecting rod 12 via a pin; the lower end of the connecting rod 8 is provided with an axial elongated hole A 81; the pin passes through the axial elongated hole A 81; under normal circumstances, the pin rests at the lowest end of the axial elongated hole A 81; when the lawn is uneven or there are obstacles, the pin moves upward along the axial elongated hole A 81, so that the cutter head 02 is raised adaptively to avoid the cutter head 02 from colliding with the ground.

[0039] The lawnmower blade lifting device also includes an adjusting component 9; the adjusting component 9 includes a connecting screw 91, and two stacked plates A 92 and B 93; the rear end of plate A 92 is hinged to the front end of the flipping rod 7; the front end of plate A 92 is provided with a threaded hole 921; the rear end of plate B 93 is provided with an axially elongated hole B 931 that corresponds to and matches the threaded hole 921; the connecting screw 91 passes through the axially elongated hole B 931 and engages with the threaded hole 921; by changing the position of the connecting screw 91 on the axially elongated hole B 931, the overall length of the adjusting component 9 can be changed, thereby leveling the blade 02 and giving the blade 02 a better mowing effect; the front end of plate B 93 is provided with an axially elongated hole C 932 that engages with a pin, so that the blade 02 can be raised with a certain degree of freedom according to the uneven or obstructed lawn, protecting the blade 02.

[0040] The lawnmower blade lifting device also includes a gas spring 10; one end of the gas spring 10 is hinged to the frame 01, and the other end is hinged to the front end of the swing arm 6; the gas spring 10 can resist the gravity of the blade 02 and help the operating lever 21 drive the swing arm 6 to swing, making the operating lever 21 easier to operate.

[0041] The two arc-shaped gear plates 31 are arranged side by side, the two ends of the clamping shaft 23 extend from the two sides of the linkage 25 and are matched with the tooth openings 311 of the two arc-shaped gear plates 31, and the locking state of the operating rod 21 is more stable.

[0042] The linkage 25 comprises two side plates 252, a bent plate 253 matched with the operating rod 21, and a fixing screw 254. The two side plates 252 are symmetrically arranged about the bent plate 253. The sliding shaft 251 is fixedly connected to the rear end of the side plate 252. The clamping shaft 23 penetrates the front end of the side plate 252 and the upper part of the bent plate 253. The return spring 22 is connected to the lower end of the bent plate 253 through the fixing screw 254. The bent plate 253 and the side plate 252 independently act. When the side plate 252 is deflected relative to the sliding shaft 251, the bent plate 253 does not need to be deflected, and the return spring 22 does not need to be excessively stretched, thereby achieving the effect of protecting the service life of the return spring 22.

[0043] The fixing screw 254, the return spring 22 and the fixing plate 211 are arranged at the front end of the operating rod 21, which reduces the deflection of the return spring 22 when stretched and protects the service life of the return spring 22.

[0044] The working principle of the embodiment is as follows: the upper end of the operating rod 21 can be deflected forward and backward to change the position of the clamping shaft 23, and the rear connecting rod 12 is deflected through the driving rod 4, finally causing the lifting of the cutter head 02. During operation, the palm needs to be pressed against the operating handle 214, and the four fingers need to be tightly gripped around the holding rod 241 of the auxiliary operating rod 24 to make the sliding shaft 251 move backward along the sliding groove 2131. The backward sliding shaft 251 acts on the clamping shaft 23 through the linkage 25 to lift the clamping shaft 23 axially along the operating rod 21, and then the clamping shaft 23 is separated from the range of the tooth opening 311. In this way, the operating rod 21 can be deflected correspondingly. When the operating rod 21 is deflected to a corresponding angle, that is, the cutter head 02 is lifted to a suitable height, the palm is still pressed against the operating handle 214, but the four fingers are loosened around the holding rod 241. The return spring 22 acts on the linkage 25 to move the sliding shaft 251 forward, and the clamping shaft 23 moves downward. The clamping shaft 23 is clamped into the corresponding tooth opening 311. The height of the cutter head 02 is locked. During the walking process of the mower, the resistance of the cutter head 02 is borne by the gear assembly. The bearing capacity of the gear assembly is high, and the height of the cutter head 02 after lifting is more stable.

[0045] Embodiment two: embodiment two is basically the same as embodiment one, and the same parts will not be described again. The difference is that the lower end of the auxiliary operating rod 24 is connected to the inner side of the side plate 252, and the middle part of the auxiliary operating rod 24 is folded forward. In this way, the auxiliary operating rod 24 can only be deflected by a small angle along the operating rod 21, and people can easily hold the holding rod 241.

[0046] The gear assembly further comprises a protective shell 32. The top of the protective shell 32 is provided with a notch 321 corresponding to the stroke of the operating rod 21. The upper end of the operating rod 21 penetrates the notch 321. The protective shell 32 protects the gear assembly.

Claims

1. A lawnmower blade lifting device, comprising a parallelogram linkage mechanism connecting the frame and the blade; the parallelogram linkage mechanism includes two front linkages and two rear linkages; characterized in that, The lifting device also includes an operating component, a gear shifting component, and a drive rod. The operating component includes an operating rod, a return spring, a retaining shaft, an auxiliary operating rod, and a linkage. The gear shifting component includes an arc-shaped gear plate centered on the lower end of the operating rod. The upper end of the arc-shaped gear plate has evenly distributed teeth. The lower end of the operating rod is hinged to the vehicle frame. The lower part of the operating rod has a fixing plate that connects to the lower end of the return spring. The middle part of the operating rod has an axial sliding elongated hole. A connecting plate extends outward from the rear side of the middle part of the operating rod. The rear side of the upper end of the connecting plate has a sliding groove perpendicular to the axis of the operating rod. The lower end of the connecting plate is driven to the rear linkage via a drive rod. The rear end of the linkage has a sliding shaft that mates with the sliding groove. The retaining shaft passes through the front end of the linkage and slides in mates with the sliding elongated hole. The front end of the linkage connects to the upper end of the return spring. The upper end of the operating rod, extending beyond the linkage, mates with the teeth. The upper end of the operating rod has a transverse operating handle. The upper end of the auxiliary operating rod has a transverse grip. The grip is positioned in front of the operating handle. The lower end of the auxiliary operating rod connects to the linkage.

2. The lawnmower blade lifting device according to claim 1, characterized in that: It also includes a transverse synchronous shaft, a swing arm, a tilting rod, and a connecting rod; the rear end of the swing arm is fixedly connected to the end of the synchronous shaft, and the front end is hinged to the end of the drive rod; the tilting rods are symmetrically arranged on both sides of the synchronous shaft; the rear end of the tilting rod is fixedly connected to the synchronous shaft, and the front end is hinged to the rear end of the connecting rod; the front end of the connecting rod is hinged to the lower part of the rear connecting rod.

3. The lawnmower blade lifting device according to claim 2, characterized in that: The front end of the connecting rod is hinged to the lower part of the rear connecting rod via a pin; the lower end of the connecting rod is provided with an axially elongated hole A; the pin passes through this axially elongated hole A.

4. The lawnmower blade lifting device according to claim 2, characterized in that: It also includes an adjusting component; the adjusting component includes a connecting screw, plate A and plate B stacked on top of each other; the rear end of plate A is hinged to the front end of the flipping rod; the front end of plate A is provided with a threaded hole; the rear end of plate B is provided with an axial elongated hole B corresponding to the threaded hole; the connecting screw passes through the axial elongated hole B and engages with the threaded hole; the front end of plate B is provided with an axial elongated hole C that engages with the pin.

5. The lawnmower blade lifting device according to claim 2, characterized in that: It also includes a gas spring; one end of the gas spring is hinged to the frame, and the other end is hinged to the front end of the swing arm.

6. The lawnmower blade lifting device according to claim 1, characterized in that: There are two arc-shaped stop plates; the two arc-shaped stop plates are arranged side by side; both ends of the locking shaft extend from both sides of the linkage and engage with the teeth of the two arc-shaped stop plates.

7. The lawnmower blade lifting device according to claim 1, characterized in that: The linkage includes two side plates, a curved plate that matches the operating lever, and fixing screws; the two side plates are symmetrically arranged about the curved plate; the sliding shaft is fixed to the rear end of the side plate; the retaining shaft passes through the front end of the side plate and the upper part of the curved plate; the return spring is connected to the lower end of the curved plate through the fixing screws.

8. The lawnmower blade lifting device according to claim 7, characterized in that: The fixing screw, pull spring, and fixing plate are located at the front end of the operating lever.

9. The lawnmower blade lifting device according to claim 7, characterized in that: The lower end of the auxiliary operating lever connects to the inner side of the side plate; the middle part of the auxiliary operating lever folds forward.

10. The lawnmower blade lifting device according to claim 1, characterized in that: The gear shift assembly also includes a protective housing; the top of the protective housing has a notch that matches the travel of the operating lever; the upper end of the operating lever protrudes from the notch.

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