Lawn mower with built-in cutting mechanism

Abstract

The utility model provides a kind of mowing mechanism built-in crawler mower, which can better ensure the synchronous lifting of the two sides of the mowing mechanism and help increase the cutting width of the mowing mechanism, relating to the technical field of mowers.The mowing mechanism built-in crawler mower includes a frame, a mowing mechanism, a mowing height adjusting mechanism and a crawler walking mechanism, and the frame is provided with a mounting bracket.The mounting bracket is hinged to the frame through a hinge shaft arranged along the width direction of the frame.The mowing height adjusting mechanism includes a lifting drive mechanism, a rotating shaft and an arc-shaped rack arranged on both sides of one end of the mowing mechanism mounted on the mounting bracket.The rotating shaft is rotatably connected to the frame, and the two ends of the rotating shaft are provided with drive gears engaged with the arc-shaped racks.The lifting drive mechanism is drivingly connected to the rotating shaft.The utility model can improve the working efficiency of the mower.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, specifically a tracked lawnmower with a built-in mowing mechanism. Background Technology

[0002] A lawnmower, also known as a lawn mower, lawn trimmer, or lawn mower, is a mechanical tool used for trimming lawns, vegetation, etc. Based on the location of the mowing mechanism, lawnmowers are classified into built-in lawnmowers and front-mounted lawnmowers. In a built-in lawnmower, the mowing mechanism is located between the front and rear wheels. For an example of a built-in mowing mechanism, refer to the mowing device and lawnmower disclosed in publication number CN222655774U. In a front-mounted lawnmower, the mowing mechanism is located in front of the wheels. For an example of a front-mounted mowing mechanism, refer to a railway slope mowing and brush-cutting robot disclosed in publication number CN212278881U. Based on wheel system structure, lawnmowers are classified into roller lawnmowers and tracked lawnmowers. Based on the cutting method of the blades, they are classified into rotary blade type and swivel blade type, with swivel blade type further divided into disc swivel blade type and suspended swivel blade type. For a blade-disc type structure, refer to the blade-disc mower disclosed in publication number CN222053913U. For a suspended blade type structure, refer to the heavy-duty blade-disc mower with tail wheel disclosed in publication number CN206433381U.

[0003] Tracked lawnmowers with built-in mowing mechanisms have the advantages of relatively small influence of terrain on mowing height, stronger grip and climbing ability, and are suitable for working on uneven or steep terrain. They are widely used in agricultural production.

[0004] Existing tracked lawnmowers with integrated mowing mechanisms typically incorporate a mowing height adjustment mechanism to allow for height adjustment based on actual conditions. To ensure better force distribution and synchronized movement on both sides of the mowing mechanism, this mechanism usually consists of at least two telescopic cylinders (usually hydraulic cylinders). These two cylinders are vertically mounted on either side of the mowing mechanism, allowing it to move vertically up and down. This structure can be referenced in the self-propelled chassis-mounted, height-adjustable lawnmower disclosed in patent application CN109197114B. However, in practical use, the existing tracked lawnmowers with integrated mowing mechanisms, featuring at least two telescopic cylinders for height adjustment, present challenges in synchronizing the control of these cylinders, making it difficult to guarantee synchronicity on both sides of the mowing mechanism. Furthermore, because the telescopic cylinders require oil supply lines, they are difficult to place within the track mechanism and are currently positioned between the track and mowing mechanisms. This results in a smaller cutting width and reduced mower efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a tracked lawnmower with a built-in mowing mechanism that can better ensure the synchronous lifting and lowering of both sides of the mowing mechanism and help increase the cutting width of the lawnmower.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a tracked lawn mower with built-in mowing mechanism, including a frame, a mowing mechanism, a mowing height adjustment mechanism and a tracked walking mechanism arranged on both sides of the frame, wherein the frame is provided with a mounting frame for the built-in installation of the mowing mechanism;

[0007] One end of the mounting frame is hinged to the frame via a hinge pin arranged along the width direction of the frame, and the mowing mechanism is mounted on the other end of the mounting frame;

[0008] The lawn mowing height adjustment mechanism includes a lifting drive mechanism, a rotating shaft, and arc-shaped racks respectively disposed on both sides of one end of the lawn mowing mechanism mounted on the mounting frame. The center of the arc-shaped racks coincides with the axis of the hinge shaft.

[0009] The rotating shaft is rotatably connected to the frame, thereby enabling it to rotate around its own axis, and the rotating shaft is arranged parallel to the hinge shaft; drive gears are installed at both ends of the rotating shaft, which respectively mesh with the arc-shaped racks on both sides of the mounting frame.

[0010] The lifting drive mechanism is connected to the rotating shaft to drive the rotating shaft to rotate.

[0011] Furthermore, the lifting drive mechanism is located behind the mowing mechanism.

[0012] Furthermore, the lifting drive mechanism is a telescopic cylinder, and the rotating shaft is also provided with an eccentrically arranged drive connection part. One end of the lifting drive mechanism is hinged to the mounting frame, and the other end is hinged to the drive connection part.

[0013] Furthermore, the arc-shaped rack and drive gear are arranged within the space enclosed by the tracks of the tracked walking mechanism on the corresponding side.

[0014] Furthermore, the mowing mechanism includes a mowing spindle arranged on the mounting frame along the width direction of the frame, and a plurality of swivel blades mounted on the outside of the mowing spindle.

[0015] Furthermore, it also includes a mowing drive mechanism, which is mounted on the mounting frame and is connected to the mowing spindle via a transmission mechanism.

[0016] Furthermore, the transmission mechanism is a belt drive mechanism.

[0017] Furthermore, the transmission mechanism is disposed within the space enclosed by the tracks of the tracked walking mechanism on one side of the frame.

[0018] The beneficial effects of this utility model are:

[0019] The lawnmower of this utility model has a lifting drive mechanism that drives the mounting frame to rotate up and down around the hinge shaft by rotating the drive shaft, so as to adjust the height of the lawnmower mechanism off the ground. The drive shaft drives the arc-shaped racks on both sides of the mounting frame through the drive gears at both ends, thus ensuring the synchronous lifting of both sides of the lawnmower mechanism.

[0020] This utility model adopts a structure in which an arc-shaped rack and a drive gear work together to drive and directly support one end of the mowing mechanism mounted on the mounting frame. Compared with the existing structure in which the mounting frame is directly supported by a telescopic cylinder, the thickness of the arc-shaped rack and the drive gear can be smaller than the diameter of the telescopic cylinder, and it occupies less space. Therefore, this utility model can make the mowing mechanism wider, increase the cutting width of the mower, and improve the working efficiency of the mower. Attached Figure Description

[0021] Figure 1 This is a side view of the present invention;

[0022] Figure 2 This is a top view of the present invention;

[0023] Figure 3 This is a perspective view of the present invention;

[0024] The figure shows: frame 1, mowing mechanism 2, tracked walking mechanism 3, hinge shaft 4, mowing drive mechanism 6, mounting frame 11, mowing spindle 21, Y-shaped slinger 22, lifting drive mechanism 51, rotating shaft 52, arc rack 53, drive gear 54, driving pulley 71, driven pulley 72, transmission belt 73, and drive connection part 521. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 and Figure 2As shown, this utility model discloses a tracked lawnmower with an integrated mowing mechanism, comprising a frame 1, a mowing mechanism 2, a mowing height adjustment mechanism, and tracked walking mechanisms 3 disposed on both sides of the frame 1. The frame 1 is provided with a mounting frame 11 for internally mounting the mowing mechanism 2. One end of the mounting frame 11 is hinged to the frame 1 via a hinge pin 4 disposed along the width direction of the frame 1. This hinge allows the mounting frame 11 to rotate and swing around the hinge pin 4. The mowing mechanism 2 is mounted on the other end of the mounting frame 11. The mowing height adjustment mechanism includes a lifting drive mechanism 51, a rotating shaft 52, and arc-shaped racks 53 respectively disposed on both sides of the end of the mounting frame 11 where the mowing mechanism 2 is mounted. The center of the arc-shaped racks 53 coincides with the axis of the hinge pin 4. The rotating shaft 52 is rotatably connected to the frame 1, thereby allowing it to rotate around its own axis, and the rotating shaft 52 is arranged parallel to the hinge pin 4. The two ends of the rotating shaft 52 are equipped with drive gears 54 that mesh with the arc-shaped racks 53 on both sides of the mounting bracket 11. The lifting drive mechanism 51 is connected to the rotating shaft 52 to drive the rotating shaft 52 to rotate.

[0027] The lawn mowing mechanism 2 can be any existing lawn mowing mechanism. For example... Figure 2 and Figure 3 As shown in the embodiment of this utility model, the mowing mechanism 2 is a suspended swivel mowing mechanism, which is more adaptable to complex terrain and harsh environments. The suspended swivel mowing mechanism includes a mowing spindle 21 arranged along the width direction of the frame 1 on the mounting frame 11, and a plurality of swivel blades 22 installed on the outside of the mowing spindle 21. The swivel blades 22 can be Y-shaped or T-shaped, etc.

[0028] The lifting drive mechanism 51 can be a telescopic cylinder, a motor, a servo motor, etc. The telescopic cylinder includes, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, and an electric telescopic cylinder.

[0029] When the height of the mowing mechanism 2 needs to be adjusted, the lifting drive mechanism 51 is activated, causing the lifting drive mechanism 51 to drive the rotating shaft 52 to rotate forward or backward. Because the center of the arc-shaped rack 53 coincides with the axis of the hinge shaft 4, the rotating shaft 52, while rotating, can drive the arc-shaped rack 53 and the mounting bracket 11 to rotate upward or downward around the hinge shaft 4 through its drive gear 54, thereby adjusting the height of the mowing mechanism 2 above the ground.

[0030] In this utility model of lawnmower, the lifting drive mechanism 51 drives the mounting frame 11 to rotate up and down around the hinge shaft 4 by driving the rotating shaft 52 to adjust the ground clearance of the lawnmower 2. The rotating shaft 52 drives the arc-shaped racks 53 set on both sides of the mounting frame 11 through the drive gears 54 at both ends, thus ensuring the synchronous lifting of both sides of the lawnmower mechanism.

[0031] On the other hand, to better support the mowing mechanism 2, especially the suspended swivel mowing mechanism, the lifting support mechanism needs to be positioned at the ends of both ends of the mowing main shaft 21. However, in existing tracked mowers, the end of the mounting frame that houses the mowing mechanism is directly supported by a telescopic cylinder. Furthermore, because the telescopic cylinder requires oil supply lines, it is difficult to place within the track mechanism. Placing the telescopic cylinder above the track mechanism would affect the mower's maneuverability. Therefore, currently, the directly supported telescopic cylinder can only be placed between the track mechanism and the mowing mechanism, resulting in a smaller cutting width. This invention employs a structure where an arc-shaped rack 53 and a drive gear 54 cooperate, driving and supporting the mounting frame 11 at one end of the mowing mechanism 2. This allows the lifting drive mechanism to be positioned on the mower without affecting the cutting width, such as behind the mowing mechanism. Compared to the existing mounting frame structure directly supported by a telescopic cylinder, under the same conditions, the structure using an arc-shaped rack 53 and a drive gear 54 drives and supports the mounting frame 11 to install one end of the mowing mechanism 2. The thickness of the arc-shaped rack 53 and the drive gear 54 can be smaller than the diameter of the telescopic cylinder, thus occupying less space. Therefore, this invention allows for a wider mowing mechanism, increasing the cutting width of the lawnmower.

[0032] This utility model adopts a structure in which an arc-shaped rack 53 and a drive gear 54 cooperate. The drive and support mounting bracket 11 is used to install one end of the mowing mechanism 2, which also makes it easy to arrange the arc-shaped rack 53 and the drive gear 54 within the space enclosed by the track of the track walking mechanism 3.

[0033] Although the thickness of the arc-shaped rack 53 and the drive gear 54 can be smaller than the diameter of the telescopic cylinder, if the arc-shaped rack 53 and the drive gear 54 are still arranged between the track mechanism and the mowing mechanism in the existing manner, they will still occupy a certain amount of cutting space. This will also result in the grass in this occupied space neither being cut nor crushed, potentially leading to small shrubs and tall grasses getting embedded. This situation will prevent the machine from moving forward smoothly. Therefore, to facilitate the mower's movement and further increase the cutting width, preferably, the arc-shaped rack 53 and the drive gear 54 are arranged within the space enclosed by the tracks of the track-walking mechanism 3 on the corresponding side. That is, the arc-shaped rack 53 and the drive gear 54 on the left side of the mounting frame 11 are arranged within the space enclosed by the tracks of the track-walking mechanism 3 on the left side of the frame, and the arc-shaped rack 53 and the drive gear 54 on the right side of the mounting frame 11 are arranged within the space enclosed by the tracks of the track-walking mechanism 3 on the right side of the frame. Arranging the arc-shaped rack 53 and the drive gear 54 within the space enclosed by the track of the track walking mechanism 3 not only avoids occupying the cutting width space and obstructing the lawnmower's progress, but also protects the arc-shaped rack 53 and the drive gear 54. This prevents surrounding branches and other objects from extending into the gaps between the teeth of the arc-shaped rack 53 when the lawnmower is cutting grass, and makes it easier to adjust the cutting height when cutting grass.

[0034] In this embodiment of the present invention, the lifting drive mechanism 51 is a telescopic cylinder. When the lifting drive mechanism 51 is a telescopic cylinder, the rotating shaft 52 is also provided with an eccentrically arranged drive connection part 521. One end of the lifting drive mechanism 51 is hinged to the mounting frame 11, and the other end is hinged to the drive connection part 521.

[0035] The rotating shaft 52 is provided with an eccentrically positioned drive connection part 521, that is, the drive connection part 521 is disposed on the rotating shaft 52 and is located at a certain distance from the center of the rotating shaft 52. The drive connection part 521 is eccentrically positioned on the rotating shaft 52, and the other end of the telescopic cylinder is hinged to the drive connection part 521, so that when the telescopic cylinder extends or retracts, the drive connection part 521 can generate a torque to drive the rotating shaft 52 to rotate, thereby driving the rotating shaft to rotate.

[0036] This utility model also includes a mowing drive mechanism 6, which can be an electric motor, a gasoline engine, etc. The mowing drive mechanism 6 is mounted on the mounting frame 11 and is connected to the mowing spindle 21 via a transmission mechanism. The transmission mechanism can be a gear transmission mechanism, a chain transmission mechanism, a belt transmission mechanism, etc.

[0037] In this embodiment of the invention, the transmission mechanism is a belt drive mechanism, including a driving pulley 71, a transmission belt 73, and a driven pulley 72. The driving pulley 71 is mounted on the output shaft of the mowing drive mechanism 6, and the driven pulley 72 is mounted on one end of the mowing main shaft 21. One end of the transmission belt 73 is sleeved on the driving pulley 71, and the other end is sleeved on the driven pulley 72. The belt drive mechanism has advantages such as low cost and convenient arrangement.

[0038] Furthermore, the transmission mechanism is disposed within the space enclosed by the tracks of the tracked walking mechanism 3 on one side of the frame 1 to protect the transmission mechanism.

Claims

1. A tracked lawnmower with an integrated mowing mechanism, comprising a frame (1), a mowing mechanism (2), a mowing height adjustment mechanism, and tracked walking mechanisms (3) disposed on both sides of the frame (1), wherein the frame (1) is provided with a mounting bracket (11) for internally mounting the mowing mechanism (2), characterized in that: One end of the mounting frame (11) is hinged to the frame (1) via a hinge shaft (4) provided along the width direction of the frame (1), and the mowing mechanism (2) is mounted on the other end of the mounting frame (11); The grass-cutting height adjustment mechanism includes a lifting drive mechanism (51), a rotating shaft (52), and arc-shaped racks (53) respectively disposed on both sides of one end of the grass-cutting mechanism (2) on the mounting frame (11). The center of the arc-shaped racks (53) coincides with the axis of the hinge shaft (4). The rotating shaft (52) is rotatably connected to the frame (1), so that it can rotate around its own axis, and the rotating shaft (52) is arranged in parallel with the hinge shaft (4); the two ends of the rotating shaft (52) are equipped with drive gears (54) that mesh with the arc-shaped racks (53) on both sides of the mounting frame (11). The lifting drive mechanism (51) is connected to the rotating shaft (52) to drive the rotating shaft (52) to rotate.

2. The tracked lawnmower with built-in mowing mechanism as described in claim 1, characterized in that: The lifting drive mechanism (51) is located behind the mowing mechanism (2).

3. The tracked lawnmower with built-in mowing mechanism as described in claim 1 or 2, characterized in that: The lifting drive mechanism (51) is a telescopic cylinder, and the rotating shaft (52) is also provided with an eccentrically arranged drive connection part (521). One end of the lifting drive mechanism (51) is hinged to the mounting frame (11), and the other end is hinged to the drive connection part (521).

4. The tracked lawnmower with built-in mowing mechanism as described in claim 1, characterized in that: The arc-shaped rack (53) and drive gear (54) are arranged within the space enclosed by the track of the track walking mechanism (3) on the corresponding side.

5. The tracked lawnmower with built-in mowing mechanism as described in claim 1, characterized in that: The mowing mechanism (2) includes a mowing spindle (21) arranged on the mounting frame (11) along the width direction of the frame (1), and a plurality of swivel blades (22) mounted on the outside of the mowing spindle (21).

6. The tracked lawnmower with built-in mowing mechanism as described in claim 5, characterized in that: It also includes a mowing drive mechanism (6), which is mounted on the mounting frame (11) and is connected to the mowing spindle (21) via a transmission mechanism.

7. The tracked lawnmower with built-in mowing mechanism as described in claim 6, characterized in that: The transmission mechanism is a belt drive mechanism.

8. The tracked lawnmower with built-in mowing mechanism as described in claim 6 or 7, characterized in that: The transmission mechanism is located within the space enclosed by the tracks of the tracked walking mechanism (3) on one side of the frame (1).

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