Agricultural grass trimmer

Abstract

The utility model discloses an agricultural grass trimmer which comprises a transmission case, the transmission case is rotatably connected with an output shaft, the output shaft is statically connected with a rigid cutting blade, a grass-proof cover surrounding the output shaft is arranged between the transmission case and the cutting blade, and the open end of the grass-proof cover is in clearance fit with the cutting blade. According to the scheme, the problem that in the prior art, when a grass trimmer is used for cutting high-density and deep weeds, the weeds are prone to winding the connecting position of the output shaft and the cutting blade is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an agricultural grass trimmer. BACKGROUND

[0002] The agricultural grass trimmer is a device for cutting weeds in agricultural production activities. The existing agricultural grass trimmer comprises a rack, a prime mover for providing power and a transmission box for transmitting power, and a rigid cutting blade is installed on the output shaft of the transmission box.

[0003] Chinese patent document CN110741800A discloses an agricultural grass trimmer, which comprises a walking mechanism, a driving mechanism, a handle, a transmission mechanism, a grass trimming disc and a grass cutting knife. The driving mechanism is installed on the walking mechanism, the handle is installed on the walking mechanism or the driving mechanism, the transmission mechanism is connected with the driving mechanism, and the transmission mechanism drives the grass cutting knife to rotate in the grass trimming disc. The grass trimming disc is installed on the transmission mechanism. The grass trimming disc further comprises a roller adjusting mechanism. The roller adjusting mechanism comprises a roller, a connecting frame, an adjusting plate and a fixing frame. The fixing frame is fixedly installed on the walking mechanism. The fixing frame is provided with a plurality of positioning holes. The connecting frame is hingedly connected to the fixing frame. The front end of the connecting frame is provided with the rotatable roller. The roller is located in front of the grass trimming disc. The rear end of the connecting frame is provided with a positioning device. The positioning device is positioned by the positioning holes. The existing technical solution solves the problem of adjusting the grass trimming height and meets the needs of users for different cutting heights. However, when the grass density is high and the grass is strong, the grass is easy to wrap around the connection position of the output shaft and the grass cutting knife, thereby affecting the normal work of the grass trimmer.

[0004] Chinese patent document CN209234285U discloses a grass cutting head assembly of a garden tool. The blade is fixed on the power output shaft by means of fastening bolts and through holes provided on the blade. However, when the grass density is high, the grass is deep and the grass is strong, the grass is still easy to wrap around the connection position of the output shaft and the blade, thereby affecting the normal work of the grass trimmer. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an agricultural grass trimmer to solve the problem that the grass is easy to wrap around the connection position of the output shaft and the cutting blade when the grass trimmer in the prior art cuts the grass with high density and deep depth.

[0006] In order to achieve the above object, the utility model discloses a basic scheme provides an agricultural grass beater, including transmission case, the transmission case rotation is connected with output shaft, the output shaft static connection has rigid cutting blade, the transmission case with cutting blade between be provided with the grass cover that surrounds output shaft, the open end of grass cover and cutting blade gap cooperation.

[0007] The beneficial effects of the basic scheme are that: when the output shaft drives the cutting blade to rotate for mowing, the cutting blade and the output shaft are connected by the grass cover, the grass cover does not rotate with the cutting blade, the position where the output shaft and the cutting blade are connected does not contact the weeds, thereby avoiding the weeds from winding around the position where the output shaft and the cutting blade are connected; at the same time, the grass cover remains stationary, which also avoids the weeds from winding around the grass cover. Therefore, by using the present scheme, the problem of winding of the grass beater when cutting weeds with high density and deep depth is reduced, which is beneficial to improve the work efficiency of the grass beater when cutting weeds with high density and deep depth.

[0008] Preferably, the grass cover is static connected with the transmission case. By adopting such arrangement, it is convenient to install and fix the grass cover, thereby facilitating the simplification of structure and reducing the manufacturing cost.

[0009] Preferably, the inside of the grass cover is provided with a transfer member for connecting the cutting blade and the output shaft. By adopting such arrangement, the connection of the cutting blade and the output shaft is transferred through the transfer member, which is beneficial to disperse stress and improve structural reliability.

[0010] Preferably, the transfer member includes a transmission sleeve fixedly sleeved outside the output shaft, the transmission sleeve is fixedly connected with a blade mounting seat, and the cutting blade is connected and fixed with the blade mounting seat through at least two connecting members. By adopting such arrangement, the structure of the transfer member is relatively simple, which is convenient for assembly and maintenance.

[0011] Preferably, all the connecting members are uniformly distributed around the rotation axis of the cutting blade. By adopting such arrangement, the connecting members do not rotate by themselves when the cutting blade works, but make circular motion around the rotation axis of the cutting blade, so that the weeds are not easy to wind around the connecting members, thereby further reducing the occurrence of the problem of winding of weeds.

[0012] Preferably, the blade mounting seat is in the form of a plate perpendicular to the transmission sleeve. By adopting such arrangement, the processing and setting of the blade mounting seat are facilitated, thereby reducing the cost.

[0013] Preferably, a dust cover is sealingly connected between the outer side of the blade mounting seat and the cutting blade. With such an arrangement, the dust cover forms a labyrinth blocking effect on the gap between the grass guard and the cutting blade inside the grass guard, so as to further reduce the sundries into the grass guard, and further reduce the adverse effects of the sundries on the rotation of the cutting blade.

[0014] Preferably, the end of the output shaft is connected with a limiting member fitted with the transmission sleeve, and the cutting blade is provided with a positioning hole opposite to the limiting member, and the positioning hole is matched with the shaft hole of the output shaft. With such an arrangement, the positioning hole can position the output shaft, making the output shaft more stable, while avoiding the contact of the limiting member with sundries, causing maintenance inconvenience and other problems. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic view of an embodiment of the utility model of an agricultural grass mower;

[0016] Figure 2 is Figure 1 the cooperation between the transfer member and the dust cover. DETAILED DESCRIPTION

[0017] The following will be further described in detail through specific embodiments:

[0018] The reference signs in the drawings of the specification include: horizontal transmission box body 1, vertical transmission box body 2, output shaft 3, grass guard 4, cutting blade 5, dust cover 6, connecting piece 7, blade mounting seat 8, transmission sleeve 9, limiting member 10.

[0019] The embodiment is basically as shown in the drawings: Figure 1 and Figure 2 An agricultural grass mower includes a transmission box, and the transmission box is rotationally connected with an output shaft 3. In this embodiment, the transmission box includes a horizontal transmission box body 1 and a vertical transmission box body 2, a horizontal transmission system is arranged in the horizontal transmission box body 1, the output shaft 3 is arranged in the vertical transmission box body 2, and the output shaft 3 and the horizontal transmission system are transmissionally connected through a bevel gear set. The lower end of the output shaft 3 is statically connected with a rigid cutting blade 5. A grass guard 4 surrounding the output shaft 3 is arranged between the transmission box and the cutting blade 5, the grass guard 4 is statically connected with the transmission box, and the open end of the grass guard 4 is gap-fitted with the cutting blade 5. In this embodiment, the connection mode between the grass guard 4 and the transmission box is preferably welding. Of course, in other embodiments, the grass guard can also be fixed through other components of the grass mower.

[0020] The inside of the grass shield 4 is provided with a transfer member for connecting the cutting blade 5 and the output shaft 3. In the embodiment, the transfer member comprises a transmission sleeve 9 fixedly sleeved outside the output shaft 3, and the transmission sleeve 9 is fixedly connected with a blade mounting seat 8. In the embodiment, the transmission sleeve 9 is in key connection with the output shaft 3. The blade mounting seat 8 is in the form of a plate arranged perpendicularly to the transmission sleeve 9. The cutting blade 5 is connected and fixed with the blade mounting seat 8 through at least two connecting members 7. In the embodiment, all the connecting members 7 are uniformly distributed around the rotation axis of the cutting blade 5. In the embodiment, the connecting members 7 are preferably bolts; the blade mounting seat 8 is provided with two mounting holes distributed on both sides of the transmission sleeve 9; the cutting blade 5 is provided with connecting holes corresponding to the mounting holes, and the connecting members 7 pass through the connecting holes and the mounting holes to connect and fix the cutting blade 5 with the blade mounting seat 8. In the embodiment, the end of the output shaft 3 is connected with a limiting member 10 abutting against the transmission sleeve 9, and the cutting blade 5 is provided with a positioning hole opposite to the limiting member 10, which is arranged in cooperation with the end shaft hole of the output shaft 3. In the embodiment, a dust cover 6 is sealingly connected between the outside of the blade mounting seat 8 and the cutting blade 5. One end of the dust cover 6 is preferably welded and fixed with the blade mounting seat 8, and the other end abuts against the cutting blade 5.

[0021] By adopting the scheme, when the output shaft 3 drives the cutting blade 5 to rotate to cut grass, the position where the cutting blade 5 is connected with the output shaft 3 is surrounded by the grass shield 4, and the grass shield 4 does not rotate with the cutting blade 5, so that the position where the cutting blade 5 is connected with the output shaft 3 is not contacted with the weeds, thereby avoiding the weeds from winding around the position where the cutting blade 5 is connected with the output shaft 3. Meanwhile, the grass shield 4 remains stationary, and the weeds are also avoided from winding around the grass shield 4. Therefore, by adopting the scheme, the problem of winding of the grass trimmer when cutting the weeds with high density and deep depth is reduced, and the working efficiency of the grass trimmer when cutting the weeds with high density and deep depth is improved.

[0022] The above only describes the embodiments of the utility model, and the well-known specific structures and characteristics are not described in detail. It should be noted that, for those skilled in the art, without departing from the structure of the utility model, a number of modifications and improvements can be made, which should also be regarded as the protection range of the utility model, and these will not affect the effect and practicality of the utility model.

Claims

1. An agricultural grass trimmer comprising a transmission case, a output shaft rotatably connected to the transmission case, and a rigid cutting blade fixedly connected to the output shaft, characterized in that: The transmission case is provided with a grass shield surrounding the output shaft, and the open end of the grass shield is in gap fit with the cutting blade.

2. The agricultural brush cutter according to claim 1, characterized in that: The grass shield is in static connection with the transmission case.

3. A grass trimmer for agricultural use according to claim 1 or 2, characterized in that: The grass shield is internally provided with a transfer member for connecting the cutting blade and the output shaft.

4. A farm grass trimmer according to claim 3 wherein: The transfer member comprises a transmission sleeve fixedly sleeved outside the output shaft, the transmission sleeve is fixedly connected with a blade mounting seat, and the cutting blade is connected and fixed with the blade mounting seat through at least two connecting members.

5. An agricultural brush cutter according to claim 4 wherein: All the connecting members are uniformly distributed around the rotary axis of the cutting blade.

6. An agricultural brush cutter according to claim 5 wherein: The blade mounting seat is in plate shape and is vertically arranged with the transmission sleeve.

7. An agricultural brush cutter according to claim 6 wherein: A dust cover is sealingly connected between the outer side of the blade mounting seat and the cutting blade.

8. An agricultural brush cutter according to claim 7 wherein: The end of the output shaft is connected with a limiting member abutting against the transmission sleeve, the cutting blade is provided with a positioning hole opposite to the limiting member, and the positioning hole is in fit arrangement with the shaft hole of the output shaft.

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