Walking type grass trimmer

Abstract

The utility model discloses a walking type grass trimmer which comprises a bearing frame and a power device arranged on the bearing frame, a handrail frame is installed on the upper portion of the rear side of the bearing frame, walking wheels are installed on the lower portion of the rear side of the bearing frame, a blade installation shell is installed on the front side of the bearing frame, and a rotating shaft is installed between a left side plate and a right side plate in the blade installation shell. Blades are evenly distributed on the rotating shaft in the axial direction, and the rotating shaft and the walking wheels are driven by the power device. A lifting support is installed on the outer side of the blade installation shell, the transverse part of the lifting support is located above the rear side of the blade installation shell and is in threaded connection with the rear side of the blade installation shell through an adjusting screw, and the vertical parts of the lifting support are located on the two sides of the blade installation shell. Supporting wheels are installed at the outer ends of the lifting supports. The structure is mature and simple, operation is convenient, the height of the blade installation shell and the height of the driving shaft are adjusted through the adjusting screw, and the device is suitable for different conditions and grass remaining heights.

Description

Technical Field

[0001] This utility model relates to the field of agricultural tools technology, specifically to a hand-held grass cutter. Background Technology

[0002] With the advancement of agricultural modernization and urbanization, the market demand for lawn mowers continues to grow. As an important tool for improving agricultural production efficiency and urban landscaping, the market demand for lawn mowers will continue to increase. Different sizes of lawns, gardens, and agricultural land place different demands on the performance, efficiency, and ease of operation of lawn mowers, resulting in a wide variety of models and functions of lawn mowers on the market to meet the needs of different consumers.

[0003] During the operation of a lawn mower, the height of different parts of the grass may be inconsistent, or the length of grass roots that need to be retained may be inconsistent. It is necessary to adjust the height of the lawn mower blades. However, adjusting the height of the lawn mower blades generally requires professional operating skills and tools. Improper operation may reduce harvesting efficiency or even endanger the safety of personnel and equipment. Therefore, a simple-to-operate hand-held lawn mower with adjustable height is proposed. Summary of the Invention

[0004] To solve the above technical problems, this utility model provides a hand-held lawn mower with adjustable blade height.

[0005] The technical solution is as follows: A hand-held lawn mower, the key features of which are: a support frame and a power unit mounted on the support frame; a handrail is mounted on the upper rear side of the support frame and a walking wheel is mounted on the lower side; a blade mounting housing is mounted on the front side of the support frame; a rotating shaft is mounted between the left and right side plates inside the blade mounting housing; blades are evenly distributed along the axial direction of the rotating shaft; and both the rotating shaft and the walking wheel are driven by the power unit.

[0006] A U-shaped lifting bracket is installed on the outside of the blade mounting housing. The horizontal portion of the lifting bracket is located above the rear side of the blade mounting housing and is threaded to the rear side of the blade mounting housing via an adjusting screw. The vertical portion of the lifting bracket is located on both sides of the blade mounting housing and is hinged to the left and right side walls of the blade mounting housing via support plates. Support wheels are installed at the outer ends of the lifting bracket. Using this structure, the rotating shaft and wheels are driven by a power unit, enabling the entire lawnmower to move and weed. The blade mounting housing is located outside the rotating shaft, and the height of the rotating shaft can be raised by adjusting the screw. This allows for weeding on different terrains, effectively improving work efficiency and allowing for reasonable adjustment according to specific conditions, thus protecting the grassland.

[0007] Preferably, an upwardly protruding mounting lug is provided on the upper rear side of the blade mounting housing. The adjusting screw is threadedly connected to the mounting lug, and the middle part of the adjusting screw is fixed to the transverse portion of the lifting bracket. The front end of the lifting bracket is sleeved on the vertical column of the support wheel. With the above structure, the lifting bracket is connected to the blade mounting housing. When the adjusting screw drives the blade mounting housing to lift, it can drive the lifting bracket to lift together. The front opening of the lifting bracket is fixedly sleeved on the vertical column to maintain the stability of the front support wheel.

[0008] Preferably, the output end of the power unit is connected to a main drive wheel, and the transmission mechanism is fixed to the blade mounting housing by a mounting bracket. A drive shaft passes through the mounting bracket, and a driven wheel is located at one end of the drive shaft near the main drive wheel. A belt connects the main drive wheel and the driven wheel, and a secondary main drive wheel is located at the other end of the drive shaft. With this structure, when the power unit is working, its main drive wheel starts to rotate, which drives the drive shaft to rotate via the belt, thereby driving the secondary main drive wheel to rotate.

[0009] Preferably, a secondary driven wheel is located at the end of the blade drive mechanism furthest from the secondary primary drive wheel. A belt connects the secondary primary drive wheel and the secondary driven wheel. A tension wheel is located within the blade drive mechanism, with one end of the tension wheel abutting against the side wall of the belt. The inner side of the secondary driven wheel is connected to the rotating shaft. With this structure, the transmission mechanism drives the secondary primary drive wheel to rotate, which in turn drives the secondary driven wheel to rotate. The rotating shaft can then rotate together with the secondary driven wheel, thereby achieving weed removal.

[0010] Preferably, a weed barrier is provided at the front end of the blade mounting housing. The weed barrier includes a front weed barrier and an upper weed barrier. The upper weed barrier is hinged to the blade mounting housing via a hinged component. A hinged component is also provided at the end of the upper weed barrier away from the blade mounting housing, hinged to the front weed barrier. With this structure, the weed barrier can prevent grass blades from splashing during weeding, making them difficult to collect. Furthermore, the hinged connection allows the weed barrier to be lifted to inspect the internal rotating shaft structure.

[0011] Preferably, a walking wheel connector is provided on the rear side of the support frame, and walking wheels are connected to both sides of the walking wheel connector. A walking drive wheel is provided between the walking wheel connector and the walking wheel on the same side. The walking drive wheel is sleeved on the walking wheel connector and is connected to the main drive wheel via a belt drive. With the above structure, the walking wheels are connected to the overall lawn mower through the walking wheel connector, and the main drive wheel of the power unit can drive the walking drive wheel to rotate, thereby moving the lawn mower.

[0012] Preferably, a rotating component is provided on the upper part of the walking wheel connector, and at least three first fixing through holes are opened on the upper end face of the lower rotating platform of the rotating component. A fixing mounting component is provided on the upper rotating component corresponding to the fixing through holes. With this structure, the rotation of the lawn mower can be controlled by the rotating component.

[0013] Preferably, a handrail is hinged to the end of the upper rotating member away from the fixed mounting member. A second mounting bracket is provided on the upper rotating member below the handrail. Rotating plates are provided at both ends of the handrail. Each rotating plate has at least one rotating mounting hole corresponding to the second fixed through hole. A fixing pin is provided in the same second fixed through hole and rotating mounting hole. With this structure, the user can control the lawn mower through the handrail and the height of the handrail can be adjusted by the rotating plates, making it convenient for users of different heights.

[0014] Preferably, a clutch lever is provided on the side wall of the traveling wheel connector near the lower rotating platform, and the clutch lever is connected to the tension wheel via a clutch line. With the above structure, the clutch lever can be connected to the tension wheel of the blade drive mechanism, thereby driving the blade drive motor to rotate and causing the blades on the rotating shaft to rotate together.

[0015] Preferably, an outer housing is provided between the power unit and the drive wheel, between the power unit and the transmission mechanism, and outside the transmission mechanism and the blade drive mechanism. This structure prevents external grass blades or other impurities from entering the outer housing and affecting the operation of the lawnmower.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the structure is mature and simple. The transmission mechanism is driven to rotate by the power device, and the blade drive mechanism is transmitted to rotate through the transmission mechanism to realize the operation of the grass cutter. It is equipped with an adjusting screw that can drive the blade mounting housing at the front end of the grass cutter to lift, thereby driving the rotating shaft to lift. It can be used for different heights of land or for different grass retention heights, thus achieving efficient weeding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is another schematic diagram of the present invention;

[0019] Figure 3 A schematic diagram showing the structure after removing the outer housing 15 and the blade mounting housing 3;

[0020] Figure 4 It is a steering structure for the traveling wheels;

[0021] Figure 5 A schematic diagram of the structure for removing the grass barrier 7. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0023] like Figures 1 to 5 As shown, a hand-held lawn mower includes a support frame 1 and a power unit 2 mounted on the support frame 1. A handrail frame 14 is mounted on the upper rear side of the support frame 1, and a walking wheel 12 is mounted on the lower side. A blade mounting housing 3 is mounted on the front side of the support frame 1. A rotating shaft 6 is mounted between the left and right side plates inside the blade mounting housing 3. Blades 6a are evenly distributed along the axial direction of the rotating shaft 6. Both the rotating shaft 6 and the walking wheel 12 are driven by the power unit 2.

[0024] A U-shaped lifting bracket 9 is installed on the outside of the blade mounting housing 3. The horizontal part of the lifting bracket 9 is located above the rear side of the blade mounting housing 3, and the horizontal part of the lifting bracket 9 is threaded to the rear side of the blade mounting housing 3 through an adjusting screw 8. The vertical part of the lifting bracket 9 is located on both sides of the blade mounting housing 3, and is hinged to the left and right side walls of the blade mounting housing 3 through support plates. A support wheel 10 is installed at the outer end of the lifting bracket 9. The blade mounting housing 3 and the rotating shaft 6 at the front of the lawnmower can be lifted by adjusting the screw 8, so as to adapt to different heights of land or grass retention needs, save manpower, and improve weeding efficiency.

[0025] like Figure 3 As shown, the output end of the power device 2 is connected to the main drive wheel 2a, the transmission mechanism 4 is fixed on the blade mounting housing 3 by the mounting bracket 4a, the transmission shaft 4b is inserted in the mounting bracket 4a, the driven wheel 4c is provided at one end of the transmission shaft 4b near the main drive wheel 2a, a belt is connected between the main drive wheel 2a and the driven wheel 4c, and a secondary main drive wheel 5a is provided at the other end of the transmission shaft 4b. A secondary driven wheel 5b is provided at the end of the blade drive mechanism 5 away from the secondary main drive wheel 5a. A belt is connected between the secondary main drive wheel 5a and the secondary driven wheel 5b. Two tensioning wheels 5c are provided in the blade drive mechanism 5. One tensioning wheel 5c is pressed against the outer wall of the belt, and the other is pressed against the inner wall of the belt. The inner side of the secondary driven wheel 5b is connected to the rotating shaft 6. When the main drive wheel 2a at the output end of the power device 2 rotates, it drives the driven wheel 4c of the transmission mechanism 4a to rotate. The driven wheel 4c drives the secondary main drive wheel 5a to rotate through the transmission shaft 4b, which in turn drives the rotating shaft 6 connected to the secondary driven wheel 5b to rotate, so that the blade 6a on the rotating shaft 6 can work.

[0026] like Figure 1 , Figure 2 and Figure 5 As shown, the left and right ends of the lifting bracket 9 are respectively connected to the left and right outer side walls of the blade mounting housing 3. The lifting bracket 9 has a "U" shaped structure. An upwardly protruding mounting lug 3a is provided on the upper rear side of the blade mounting housing 3. The adjusting screw 8 is threadedly connected to the mounting lug. The middle part of the adjusting screw 8 is fixed to the horizontal part of the lifting bracket 9. The front end of the lifting bracket 9 is sleeved on the vertical column 10a of the support wheel 10. When the adjusting screw 8 connected to the blade mounting housing 3 is tightened and raised, it drives the blade mounting housing 3 to rise together. The front end, which is fixed on the vertical column 10a, also rises together, thereby ensuring the stability of the support wheel 10.

[0027] A grass-blocking plate 7 is provided at the front end of the blade mounting housing 3. The grass-blocking plate 7 includes a front grass-blocking plate 7a and an upper grass-blocking plate 7b. The upper grass-blocking plate 7b is hinged to the blade mounting housing 3 via a hinge. A hinge is provided at the end of the upper grass-blocking plate 7b away from the blade mounting housing 3, which is hinged to the front grass-blocking plate 7a. The grass-blocking plate 7 can be lifted to observe the internal situation.

[0028] like Figure 3 and Figure 4 As shown, a walking wheel connector 11 is provided on the rear side of the support frame 1. Walking wheels 12 are connected to both the left and right sides of the walking wheel connector 11. A walking drive wheel 11a is provided between the walking wheel connector 11 and the walking wheel 12 on the same side. The walking drive wheel 11a is sleeved on the walking wheel connector 11. The walking drive wheel 11a is connected to the main drive wheel 2a through a belt drive, thereby driving the walking wheel 12 to rotate and move.

[0029] A rotating component 13 is provided on the upper part of the walking wheel connector 11. At least three first fixing through holes are provided on the upper end face of the lower rotating platform 13a of the rotating component 13. A fixing mounting component is provided on the upper rotating component 13b corresponding to the fixing through holes. A handrail frame 14 is hinged to the end of the upper rotating component 13b away from the fixing mounting component. A second fixing through hole is provided on the upper rotating component 13b below the handrail frame 14. Rotating plates 14a are passed through the left and right ends of the handrail frame 14. Each rotating plate 14a has at least one rotating mounting hole corresponding to the second fixing through hole. A fixing pin is passed through the same second fixing through hole and rotating mounting hole, allowing for reasonable adjustment of the forward direction and height as needed.

[0030] like Figure 1 and Figure 2As shown, a clutch lever 16 is provided on the side wall of the traveling wheel connector 11 near the lower rotating platform 13a. The clutch lever 16 is connected to the tension wheel 5c via a clutch line and can control the switching of the blade drive mechanism 5. External housings 15 are provided between the power unit 2 and the traveling drive wheel 11a, between the power unit 2 and the transmission mechanism 4, and outside the transmission mechanism 4 and the blade drive mechanism 5. These housings prevent external impurities or other contaminants from entering the interior, ensuring normal operation.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A walk-behind grass trimmer characterized by comprising: The utility model provides a kind of lawn mower, including bearing frame (1) and the power device (2) being arranged on bearing frame (1), the upper portion of the rear side of the bearing frame (1) is equipped with handrail frame (14), lower portion is equipped with walking wheel (12), the front side of this bearing frame (1) is equipped with blade mounting shell (3), rotating shaft (6) is installed between the left and right side plates in the blade mounting shell (3), and the rotating shaft (6) is evenly distributed with blade (6a) along the axial direction, the rotating shaft (6) and walking wheel (12) are all driven by the power device (2); Lifting support (9) of "U” shape structure is installed on the outside of the blade mounting shell (3), the transverse portion of the lifting support (9) is located above the rear side of the blade mounting shell (3), and the transverse portion of the lifting support (9) is threadedly connected with the rear side of the blade mounting shell (3) by adjusting screw (8), the vertical portion of the lifting support (9) is located at the left and right sides of the blade mounting shell (3) and is hingedly connected with the left and right side walls of the blade mounting shell (3) respectively, and support wheel (10) is installed on the outer end of the lifting support (9).

2. A walk-behind grass trimmer according to claim 1, characterized in that: The rear side of the blade mounting shell (3) is provided with mounting lug (3a) protruding upward, the adjusting screw (8) is threadedly connected with the mounting lug, the middle part of the adjusting screw (8) is fixed to the transverse portion of the lifting support (9), and the front end of the lifting support (9) is sleeved on the vertical column (10a) of the support wheel (10).

3. A walk-behind grass trimmer according to claim 1, characterized in that: The output end of the power device (2) is connected with main drive wheel (2a), transmission mechanism (4) is fixed to the blade mounting shell (3) by mounting bracket (4a), transmission shaft (4b) is penetrated in the mounting bracket (4a), the end of the transmission shaft (4b) close to the main drive wheel (2a) is provided with driven wheel (4c), the main drive wheel (2a) and the driven wheel (4c) are connected with belt strip, and the other end of the transmission shaft (4b) is provided with secondary main drive wheel (5a).

4. A walk-behind grass trimmer according to claim 3 wherein: The other end of the blade driving mechanism (5) away from the secondary main drive wheel (5a) is provided with secondary driven wheel (5b), the secondary main drive wheel (5a) and the secondary driven wheel (5b) are connected with belt strip, and the blade driving mechanism (5) is provided with tensioning wheel (5c), one end of the tensioning wheel (5c) is abutted against the side wall of the belt strip, and the inner side of the secondary driven wheel (5b) is connected with the rotating shaft (6).

5. A walk-behind grass trimmer according to claim 2 wherein: The front end of the blade mounting shell (3) is hingedly provided with grass baffle (7), the grass baffle (7) includes front end grass baffle (7a) and upper end grass baffle (7b), the upper end grass baffle (7b) is hingedly connected with the blade mounting shell (3) by hinge piece, and the end of the upper end grass baffle (7b) away from the blade mounting shell (3) is hingedly connected with the front end grass baffle (7a).

6. A walk-behind grass trimmer according to claim 4 wherein: Walking wheel connecting piece (11) is arranged on the rear side of the bearing frame (1), walking wheels (12) are connected on the left and right sides of the walking wheel connecting piece (11), walking drive wheels (11a) are arranged between the walking wheel connecting piece (11) and the walking wheels (12) on the same side, the walking drive wheels (11a) are sleeved on the walking wheel connecting piece (11), and the walking drive wheels (11a) are connected with the main drive wheel (2a) through a belt strip transmission.

7. A walk-behind grass trimmer according to claim 6 wherein: Rotating members (13) are arranged on the upper portions of the walking wheel connecting pieces (11), at least three first fixing through holes are formed in the upper end surfaces of the lower rotating tables (13a) of the rotating members (13), and fixing mounting members are formed in the upper rotating members (13b) of the rotating members (13) corresponding to the fixing through holes.

8. A walk-behind grass trimmer according to claim 7 wherein: Handrails (14) are hingedly connected to the ends of the upper rotating members (13b) away from the fixing mounting members, second fixing through holes are formed in the upper rotating members (13b) below the handrails (14), rotating plates (14a) are arranged on the left and right ends of the handrails (14), at least one rotating mounting hole is formed in the rotating plates (14a) corresponding to the second fixing through holes, and fixing pin columns are arranged in the same second fixing through holes and rotating mounting holes.

9. A walk-behind grass trimmer according to claim 6 wherein: Clutch rods (16) are arranged on the side walls of the walking wheel connecting pieces (11) close to the lower rotating tables (13a), and the clutch rods (16) are connected with the tensioning wheels (5c) through clutch lines.

10. A walk-behind grass trimmer according to claim 6, characterized in that: External housings (15) are arranged between the power devices (2) and the walking drive wheels (11a), between the power devices (2) and the transmission mechanisms (4), outside the transmission mechanisms (4) and outside the blade drive mechanisms (5).

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