Height-adjustable mower

Abstract

The utility model relates to the technical field of mowing machines, in particular to a height-adjustable mowing machine which comprises a supporting rod body, and a connecting column is installed at one end of the top of the supporting rod body. The telescopic joint and the supporting rod body are connected in a sliding mode, the telescopic joint linearly slides along the inner wall of the supporting rod body in the height adjusting process, and after the telescopic joint slides to the target height, an operator rotates a fastening bolt to enable the end of the fastening bolt to penetrate through the supporting rod body and be screwed into a threaded hole in the corresponding position of the telescopic joint. Height fixation is achieved through threaded locking, height change caused by vibration in the operation process is prevented, mowing precision is guaranteed, and therefore the requirements of different mowing scenes are met, when a servo motor drives a threaded rod to rotate, a fixing block moves in the axial direction of a supporting rod body due to threaded connection with the threaded rod, a grip is driven to ascend and descend synchronously, and height adjustment of the grip is achieved; and the requirements of different operator heights or operation postures are met, operation is convenient, and practicability is better.

Description

Technical Field

[0001] This utility model relates to the technical field of lawnmowers, and in particular to a height-adjustable lawnmower. Background Technology

[0002] Backpack lawnmowers are portable garden tools carried by human hands. They are designed for efficient mowing of lawns, turf and other vegetation. Their core structure includes a small power system mounted on the back frame, which transmits power to the blades through a drive shaft to achieve high-speed rotation and cutting. The operator secures the device to their back with shoulder straps and a waist belt on the back frame and uses the control handle to perform mowing operations.

[0003] A backpack lawnmower, disclosed on the Chinese Patent Network (publication number CN207099693U), includes a handheld handle, a power unit at one end of the handle, and a transmission wheel at the other end. The power unit and the transmission wheel are connected by a transmission mechanism. A blade is coaxially mounted on the transmission wheel. A support platform is fixedly mounted on the handheld handle, and a rotating shaft is rotatably connected to the support platform. A support rod is fixedly mounted on the rotating shaft, and a traveling wheel is located at the end of the support rod. A limiting component is provided on the support platform to restrict the rotation of the rotating shaft. During use, the traveling wheel provides additional support to the handheld handle by contacting the ground, preventing excessive effort due to an excessively long handle and thus reducing the workload of the operator to some extent.

[0004] The solution also has the following problems: the lawnmower is not easy to adjust in height, which results in different arm support when people of different heights grip the handle. This can cause arm discomfort during long-term use and thus affect work efficiency, so it has certain drawbacks.

[0005] Therefore, in order to solve the above problems, this utility model provides a height-adjustable lawnmower. Utility Model Content

[0006] The purpose of this invention is to provide a height-adjustable lawnmower to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a height-adjustable lawnmower, comprising a support rod body, a connecting column installed at the top end of the support rod body, an engine assembly installed at the top of the connecting column, a telescopic joint sleeved inside the bottom end of the support rod body, a rotating head installed at the bottom end of the telescopic joint, a blade installed at the bottom of the rotating head, two sets of fixing ears installed on the outer ring surface of the support rod body, a threaded rod installed between the outer sides of the fixing ears, a movable plate jointly installed on the threaded rod and the outer side of the support rod body, a fixing block installed outside the movable plate and on the outer ring surface of the support rod body, and a handle installed outside the fixing block.

[0008] Preferably, the inner wall dimension of the support rod body is adapted to the outer ring surface dimension of the expansion joint, and the inner wall of the support rod body and the outer ring surface of the expansion joint are slidably connected.

[0009] Preferably, the outer ring surface of the expansion joint is provided with several sets of threaded holes at equal intervals, and a fastening bolt is installed on one end of the bottom of the outer ring surface of the support rod body. One end of the fastening bolt passes through the inner side of the support rod body and can be connected to the inside of one of the threaded holes.

[0010] Preferably, a servo motor is mounted on the top of one of the fixing ears, and the output shaft of the servo motor passes through the fixing ear and is connected to one end of the threaded rod. The outer ring surface of the threaded rod is threadedly connected to the inside of the fixing block.

[0011] Preferably, the interior of the movable plate and the fixed block are slidably connected to the outer ring surface of the support rod body, and the threaded rod drives the movable plate and the fixed block to move, while they slide synchronously on the outside of the support rod body.

[0012] Preferably, a strap buckle is installed on the outside of the support rod body and above the fixing ear, and a baffle is installed on the outside of the telescopic joint and near the rotating head.

[0013] In summary, this utility model has the following beneficial technical effects:

[0014] This height-adjustable lawnmower features a telescopic joint that slides along the inner wall of the support rod body during height adjustment. Once the telescopic joint reaches the target height, the operator rotates a fastening bolt, causing its end to pass through the support rod body and screw into the corresponding threaded hole on the telescopic joint. This threaded locking mechanism secures the height, preventing height changes due to vibration during operation and ensuring mowing accuracy. This meets the needs of various mowing scenarios. When the servo motor drives the threaded rod to rotate, the fixed block moves axially along the support rod body due to its threaded connection with the threaded rod, causing the handle to rise and fall synchronously, thus adjusting the handle height to suit different operator heights or working postures. This design offers convenient operation and enhanced practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a utility model Figure 1 Left side structural diagram;

[0017] Figure 3 This is a utility model Figure 2 Partial structural diagram;

[0018] Figure 4 This is a utility model Figure 3 Schematic diagram of part A in the middle.

[0019] Explanation of reference numerals in the attached drawings: 1. Support rod body; 2. Connecting column; 3. Engine assembly; 4. Expansion joint; 401. Threaded hole; 5. Rotating head; 6. Blade; 7. Fixing lug; 8. Threaded rod; 9. Movable plate; 10. Fixing block; 11. Handle; 12. Fastening bolt; 13. Servo motor; 14. Shoulder strap buckle; 15. Baffle. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1 - Figure 4 The present invention will be described in further detail below.

[0021] A height-adjustable lawnmower, see reference Figure 1 - Figure 4The system includes a support rod body 1, a connecting column 2 installed at the top end of the support rod body 1, an engine assembly 3 installed at the top of the connecting column 2, a telescopic joint 4 sleeved inside the bottom end of the support rod body 1, a rotating head 5 installed at the bottom end of the telescopic joint 4, a blade 6 installed at the bottom of the rotating head 5, two sets of fixing ears 7 installed on the outer ring surface of the support rod body 1, a threaded rod 8 installed between the outer sides of the fixing ears 7, a movable plate 9 installed together with the threaded rod 8 and the outer side of the support rod body 1, a fixing block 10 installed on the outer side of the movable plate 9 and located on the outer ring surface of the support rod body 1, and a handle 11 installed on the outer side of the fixing block 10.

[0022] Reference Figure 1 - Figure 3 The inner wall dimension of the support rod body 1 is adapted to the outer ring dimension of the telescopic joint 4, and the inner wall of the support rod body 1 and the outer ring of the telescopic joint 4 are slidably connected. The telescopic joint 4 and the support rod body 1 are slidably connected. During the height adjustment process, the telescopic joint 4 slides linearly along the inner wall of the support rod body 1. Several sets of threaded holes 401 are evenly spaced on the outer ring of the telescopic joint 4. A fastening bolt 12 is installed on one end of the bottom of the outer ring of the support rod body 1. One end of the fastening bolt 12 passes through the inner side of the support rod body 1 and can be connected to the inside of one of the threaded holes 401. When the telescopic joint 4 slides to the target height, the operator rotates the fastening bolt 12 so that its end passes through the support rod body 1 and is screwed into the threaded hole 401 at the corresponding position of the telescopic joint 4. The height is fixed by thread locking to prevent height changes due to vibration during operation and to ensure mowing accuracy, thereby meeting the needs of different mowing scenarios.

[0023] Reference Figure 1 - Figure 4 One of the fixed ears 7 has a servo motor 13 installed on its top. The output shaft of the servo motor 13 passes through the fixed ear 7 and is connected to one end of the threaded rod 8. The outer ring surface of the threaded rod 8 is threadedly connected to the inside of the fixed block 10. When the servo motor 13 drives the threaded rod 8 to rotate, the fixed block 10 moves along the axial direction of the support rod body 1 due to the threaded connection with the threaded rod 8, which drives the handle 11 to rise and fall synchronously, realizing the height adjustment of the handle 11 to adapt to the height or working posture requirements of different operators. The interior of the movable plate 9 and the fixed block 10 is slidably connected to the outer ring surface of the support rod body 1. When the threaded rod 8 drives the movable plate 9 and the fixed block 10 to move, they slide synchronously on the outside of the support rod body 1. The sliding connection between the movable plate 9 and the fixed block 10 and the support rod body 1 ensures their smooth movement under the drive of the threaded rod 8, improves the accuracy of height adjustment, and ensures the stability of the handle 11 position, so that the operator can control the lawnmower more comfortably and accurately.

[0024] Reference Figure 1 - Figure 4A strap buckle 14 is installed on the outside of the support rod body 1 and above the fixed ear 7. A baffle 15 is installed on the outside of the telescopic joint 4 and near the rotating head 5. The strap buckle 14 is used to connect the strap so that the operator can carry the lawnmower on his / her back, reducing fatigue during long-term operation. The baffle 15 is used to prevent grass clippings, stones and other flying objects generated during the mowing process from injuring the operator, thus improving the safety of the operation.

[0025] The implementation principle of a height-adjustable lawnmower according to this utility model embodiment is as follows: When using the lawnmower, the engine assembly 3 is fixed to the top of the support rod body 1 via the connecting column 2, providing power to the rotating head 5 and driving the blade 6 to rotate and cut grass. The telescopic joint 4 is slidably connected to the support rod body 1. During height adjustment, the telescopic joint 4 slides linearly along the inner wall of the support rod body 1. When the telescopic joint 4 slides to the target height, the operator rotates the fastening bolt 12 so that its end passes through the support rod body 1 and is screwed into the threaded hole 401 at the corresponding position of the telescopic joint 4. The height is fixed by thread locking to prevent height changes due to vibration during operation and to ensure cutting accuracy, thereby meeting the needs of different cutting scenarios. When the servo motor 13 drives the threaded rod 8 to rotate, the fixed block... The handle 11 moves axially along the support rod body 1 due to its threaded connection with the threaded rod 8, causing the handle 11 to rise and fall synchronously, thus achieving height adjustment of the handle 11 to adapt to the height or working posture requirements of different operators. The sliding connection between the movable plate 9 and the fixed block 10 and the support rod body 1 ensures their smooth movement under the drive of the threaded rod 8, improving the accuracy of height adjustment and ensuring the stability of the handle 11 position, allowing the operator to control the lawnmower more comfortably and accurately. The shoulder strap buckle 14 is used to connect the shoulder strap, allowing the operator to carry the lawnmower on their back, reducing fatigue during long-term operation. The baffle 15 is used to prevent grass clippings, stones, and other flying objects generated during mowing from injuring the operator, improving the safety of operation, making operation convenient, and improving practicality.

[0026] Finally, the following points should be noted: First, in the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly, and can be mechanical connection or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0027] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0029] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A height-adjustable lawnmower, comprising a support rod body (1), characterized in that: A connecting column (2) is installed at the top end of the support rod body (1), and an engine assembly (3) is installed at the top of the connecting column (2). A telescopic joint (4) is sleeved inside the bottom end of the support rod body (1). A rotating head (5) is installed at the bottom end of the telescopic joint (4). A blade (6) is installed at the bottom of the rotating head (5). Two sets of fixing ears (7) are installed on the outer ring surface of the support rod body (1). A threaded rod (8) is installed between the outer sides of the fixing ears (7). A movable plate (9) is installed on the outer side of the threaded rod (8) and the support rod body (1). A fixing block (10) is installed on the outer side of the movable plate (9) and on the outer ring surface of the support rod body (1). A handle (11) is installed on the outer side of the fixing block (10).

2. The height-adjustable lawnmower according to claim 1, characterized in that: The inner wall dimension of the support rod body (1) is adapted to the outer ring dimension of the expansion joint (4), and the inner wall of the support rod body (1) and the outer ring of the expansion joint (4) are slidably connected.

3. The height-adjustable lawnmower according to claim 1, characterized in that: The expansion joint (4) has several sets of threaded holes (401) evenly spaced on its outer ring surface. A fastening bolt (12) is installed on one end of the bottom of the outer ring surface of the support rod body (1). One end of the fastening bolt (12) passes through the inner side of the support rod body (1) and can be connected to the inside of one of the threaded holes (401).

4. A height-adjustable lawnmower according to claim 1, characterized in that: A servo motor (13) is mounted on the top of one of the fixed ears (7). The output shaft of the servo motor (13) passes through the fixed ear (7) and is connected to one end of the threaded rod (8). The outer ring surface of the threaded rod (8) is threadedly connected to the inside of the fixed block (10).

5. A height-adjustable lawnmower according to claim 1, characterized in that: The interior of the movable plate (9) and the fixed block (10) are slidably connected to the outer ring surface of the support rod body (1), and when the threaded rod (8) drives the movable plate (9) and the fixed block (10) to move, they slide synchronously on the outside of the support rod body (1).

6. A height-adjustable lawnmower according to claim 2, characterized in that: A strap buckle (14) is installed on the outside of the support rod body (1) and above the fixing ear (7), and a baffle (15) is installed on the outside of the telescopic joint (4) and near the rotating head (5).

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