A manually adjustable blade lawnmower

Abstract

This utility model discloses a manually adjustable blade mower, relating to the field of lawn mower technology. The utility model includes a frame, a drive module, and a height adjustment module. The height adjustment module consists of a rotating shaft, an inner rotating cylinder, an outer cylinder, bearings, a collar, a bevel gear set, a connecting rod, a handle, and a shaft lock. The drive module is fixed to the frame, and the height adjustment module is installed at the bottom of the frame. The rotating shaft is connected to the output end of the drive module and slides with the inner rotating cylinder. The blade disc is mounted at the bottom of the inner rotating cylinder, and the outer cylinder is fitted around its outer circumference, with a bearing fixedly installed between them. The outer cylinder is threadedly connected to the collar, and the bevel gear set engages for transmission. The connecting rod connects the driving bevel gear to the handle, and the shaft lock is fitted onto the connecting rod. This utility model achieves continuous and precise adjustment of the blade disc height through "outer cylinder-collar threaded fit + bevel gear transmission," solving the discrete adjustment defects of traditional "positioning pin + pin hole" methods. It is easy to operate, provides precise adjustment, and is suitable for various high-precision lawn mowing scenarios.

Description

Technical Field

[0001] This utility model belongs to the field of lawnmower technology, and in particular relates to a lawnmower with manually adjustable blade disc. Background Technology

[0002] In landscaping, agricultural production, and municipal maintenance, lawn and pasture mowing is a crucial step in ensuring healthy plant growth and enhancing the aesthetics of an area. Lawn mowers, as core equipment, use power modules (such as gasoline engines or electric motors) to drive cutting components (blades and blades) at high speeds, achieving efficient cutting of herbaceous plants. Compared to traditional manual mowing, this significantly reduces labor intensity while dramatically improving efficiency and trimming evenness, making it an indispensable piece of equipment in modern lawn maintenance systems. However, with the diversification of application scenarios, different lawn types (such as ornamental lawns, sports lawns, and pasture planting areas) have significantly different requirements for mowing height.

[0003] Most manually adjustable lawnmowers on the market currently use a "positioning pin + pin hole" method for fixing the blade height: multiple pin holes are spaced apart on the height adjustment components (such as adjustment brackets and lifting rods), and the blade height is fixed by inserting positioning pins into different pin holes. However, the pin holes need to be spaced a certain distance apart (usually 1-2cm), which means that the blade height can only be switched between preset discrete levels, making it impossible to achieve continuous and precise height adjustment, and difficult to meet the needs of scenarios with high trimming accuracy requirements. Utility Model Content

[0004] The purpose of this utility model is to provide a manually adjustable blade mower, which solves the problem that existing manually adjustable blade mowers use "positioning pins + pin holes" to fix the blade height, resulting in height adjustment that can only be switched between discrete gears and cannot be continuously and finely adjusted, making it difficult to meet the needs of high-precision mowing.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a manually adjustable blade mower, comprising a frame, a drive module fixedly mounted on the frame, a height adjustment module mounted at the bottom of the frame, and a rotating shaft fixedly connected to the output end of the drive module. An inner rotating cylinder is slidably fitted on the circumferential side of the rotating shaft, a blade disc is fixedly mounted at the bottom end of the inner rotating cylinder, an outer cylinder is sleeved on the outer circumferential side of the inner rotating cylinder, a bearing is fixedly installed between the inner rotating cylinder and the outer cylinder, and a collar is threadedly connected to the outer circumferential side of the outer cylinder.

[0007] The present invention is further configured such that a first connecting key is embedded in the circumferential side of the rotating shaft, and a first sliding groove is provided on the inner circumferential side of the inner rotating cylinder, wherein the first connecting key slides in cooperation with the first sliding groove.

[0008] The present invention is further configured such that a driven bevel gear is sleeved on the outer peripheral side of the outer cylinder, two symmetrical second connecting keys are embedded in the inner peripheral side of the driven bevel gear, and two symmetrical second sliding grooves are opened on the outer peripheral side of the outer cylinder, and the two second connecting keys slide in cooperation with the two second sliding grooves respectively.

[0009] The present invention is further configured such that an isolation cover is fixedly connected to the bottom of the frame, the collar is fixedly installed inside the top of the isolation cover, and the driven bevel gear is rotatably installed inside the bottom of the isolation cover.

[0010] The present invention is further configured such that a driving bevel gear meshes with the outer peripheral side of the driven bevel gear, and a connecting rod that penetrates the side wall of the isolation cover is fixedly connected to one side of the driving bevel gear.

[0011] The present invention is further configured such that a handle is fixedly connected to the end of the connecting rod away from the driving bevel gear, and a shaft lock is sleeved on the circumferential side of the connecting rod and fixedly installed on the outer wall of the frame.

[0012] This utility model has the following beneficial effects:

[0013] This utility model adopts a height adjustment structure of "outer cylinder and collar threaded fit + bevel gear transmission", which abandons the traditional discrete gear adjustment method of "positioning pin + pin hole". The operator can turn the handle to drive the outer cylinder to continuously rise and fall along the collar axis through gear transmission. Then, the bearing drives the inner rotating cylinder to move synchronously with the cutter head, realizing continuous and precise adjustment of the cutter head height. The height can be flexibly controlled according to the mowing needs of different lawn types (such as ornamental lawns and pasture planting areas), effectively meeting the use needs of high-precision mowing scenarios (such as landscape shaping and precision lawn maintenance).

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural diagram of the height adjustment module and isolation cover at the bottom of the rack.

[0018] Figure 3 This is a structural diagram of the height adjustment module;

[0019] Figure 4 This is a cross-sectional view of the height adjustment module;

[0020] Figure 5 This is an exploded view of the height adjustment module.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Frame; 2. Drive module; 3. Height adjustment module; 4. Shaft; 5. Inner cylinder; 6. Outer cylinder; 7. Bearing; 8. Collar; 9. Cutter head; 10. First connecting key; 11. First slide groove; 12. Driven bevel gear; 13. Second connecting key; 14. Second slide groove; 15. Isolation cover; 16. Drive bevel gear; 17. Connecting rod; 18. Handle; 19. Shaft lock. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation

[0025] Please see Figure 1-5 This utility model is a manually adjustable blade mower, including a frame 1, a drive module 2 fixedly installed on the frame 1, and a height adjustment module 3 installed at the bottom of the frame 1.

[0026] Specifically, the height adjustment module 3 includes a rotating shaft 4 fixedly connected to the output end of the drive module 2. An inner rotating cylinder 5 is slidably fitted on the circumference of the rotating shaft 4. A cutter head 9 is fixedly installed at the bottom end of the inner rotating cylinder 5. An outer cylinder 6 is sleeved on the outer circumference of the inner rotating cylinder 5. A bearing 7 (a deep groove ball bearing) is fixedly installed between the inner rotating cylinder 5 and the outer cylinder 6. The inner ring of the bearing 7 is fixedly connected to the inner rotating cylinder 5, and the outer ring of the bearing 7 is fixedly connected to the outer cylinder 6. A collar 8 is threadedly connected to the outer circumference of the outer cylinder 6.

[0027] The rotating shaft 4 transmits the power output from the drive module 2 and, through its sliding engagement with the inner rotating cylinder 5, allows the inner rotating cylinder 5 to move along its axial direction. The inner rotating cylinder 5 can receive the power transmitted by the rotating shaft 4 and drive the cutter head 9 to rotate. On the other hand, it can be raised and lowered along the rotating shaft 4 under the drive of the outer cylinder 6, thereby adjusting the height of the cutter head 9. The bearing 7 separates the rotational movement of the inner rotating cylinder 5 from the fixed state of the outer cylinder 6, ensuring that the outer cylinder 6 does not rotate when the inner rotating cylinder 5 rotates, but only moves along the raising and lowering of the outer cylinder 6 to drive the inner rotating cylinder 5 during height adjustment. After the collar 8 is fixedly installed, it provides a stable threaded engagement base for the outer cylinder 6. When the outer cylinder 6 rotates, it can move up and down along the axial direction of the collar 8, thereby providing a power transmission path for the height adjustment of the cutter head 9.

[0028] A first connecting key 10 is embedded in the side of the rotating shaft 4, and a first sliding groove 11 is opened on the inner side of the inner rotating cylinder 5. The first connecting key 10 and the first sliding groove 11 are slidably engaged. The first connecting key 10 is fixed on the rotating shaft 4 and can rotate synchronously with the rotating shaft 4. The first sliding groove 11 is opened on the inner wall of the inner rotating cylinder 5, and its shape is adapted to the first connecting key 10. The sliding engagement of the two can ensure that the rotating shaft 4 transmits the rotational power to the inner rotating cylinder 5, so that the inner rotating cylinder 5 rotates synchronously with the rotating shaft 4, and also allows the inner rotating cylinder 5 to move along the axial direction of the first sliding groove 11. This ensures that the transmission of power is not affected when the inner rotating cylinder 5 is raised or lowered to adjust its height, thereby ensuring that the cutter head 9 can rotate and cut normally at different heights.

[0029] A driven bevel gear 12 is fitted on the outer periphery of the outer cylinder 6. Two symmetrical second connecting keys 13 are embedded in the inner periphery of the driven bevel gear 12. Two symmetrical second sliding grooves 14 are opened on the outer periphery of the outer cylinder 6. The two second connecting keys 13 are slidably engaged with the two second sliding grooves 14 respectively. An isolation cover 15 is fixedly connected to the bottom of the frame 1. The outer cylinder 6 passes through the isolation cover 15. A collar 8 is fixedly installed at the top inside the isolation cover 15. The driven bevel gear 12 is rotatably installed at the bottom inside the isolation cover 15.

[0030] The second connecting key 13 is fixed to the inner wall of the driven bevel gear 12, and the second sliding groove 14 is opened on the outer wall of the outer cylinder 6. The two work together to transmit the rotational power of the driven bevel gear 12 to the outer cylinder 6, while allowing the outer cylinder 6 to move along the axial direction of the second sliding groove 14, ensuring that the outer cylinder 6 can rise and fall smoothly while rotating. The collar 8 is fixed to the top of the isolation cover 15, keeping the position of the collar 8 fixed and restricting the rotation of the collar 8, providing a stable reference for the threaded movement of the outer cylinder 6. The driven bevel gear 12 is rotatably installed at the bottom of the isolation cover 15, which can ensure that its position is stable when rotating and maintain a good meshing state with the driving bevel gear 16, ensuring smooth power transmission.

[0031] Driven bevel gear 12 is meshed with drive bevel gear 16 on its outer peripheral side. A connecting rod 17 that penetrates the side wall of isolation cover 15 is fixedly connected to one side of drive bevel gear 16. A handle 18 is fixedly connected to the end of connecting rod 17 away from drive bevel gear 16. A shaft lock 19 that is fixedly installed on the outer side wall of frame 1 is sleeved on the peripheral side of connecting rod 17.

[0032] The driving bevel gear 16 meshes with the driven bevel gear 12, changing the direction of power transmission and converting the horizontal rotational power transmitted by the connecting rod 17 into the vertical rotational power of the driven bevel gear 12. The connecting rod 17 connects the handle 18 and the driving bevel gear 16, transmitting the power generated by the operator turning the handle 18 to the driving bevel gear 16, serving as an intermediate component for power transmission. The handle 18 provides a force application point for the operator, and its design facilitates manual gripping and application of rotational force, reducing the difficulty of height adjustment. The shaft lock 19 is fitted onto the connecting rod 17. After the height of the cutter head 9 is adjusted to the correct position, tightening the shaft lock 19 restricts the rotation of the connecting rod 17, which in turn restricts the rotation of the outer cylinder 6 through the driving bevel gear 16 and the driven bevel gear 12, preventing the outer cylinder 6 from continuing to rise or fall, ultimately fixing the height of the cutter head 9 and preventing unexpected changes in the height of the cutter head 9 during operation.

[0033] The operation process of this embodiment is as follows: First, loosen the fastening bolts on the shaft lock 19 to release the rotation restriction of the shaft lock 19 on the connecting rod 17; then, the operator manually turns the handle 18, which drives the connecting rod 17 to rotate, and the connecting rod 17 transmits the rotational power to the driving bevel gear 16, causing the driving bevel gear 16 to rotate synchronously; the driving bevel gear 16 drives the driven bevel gear 12 to rotate through the meshing engagement with the driven bevel gear 12; the driven bevel gear 12 transmits the rotational power to the outer cylinder 6 through the engagement of the second connecting key 13 and the second sliding groove 14, causing the outer cylinder 6 to rotate; since the outer cylinder 6 is threadedly connected to the collar 8, and the collar 8 is fixed inside the top of the isolation cover 15, the outer cylinder 6 will move up and down along the axial direction of the collar 8 while rotating; the outer cylinder 6 During movement, the inner rotating cylinder 5 moves up and down synchronously via the bearing 7, which in turn drives the cutter head 9 fixed at the bottom to rise and fall together until the cutter head 9 is adjusted to the required height. At this time, tighten the fastening bolt on the locking shaft 19, which restricts the connecting rod 17 from rotating. The connecting rod 17 then restricts the rotation of the driving bevel gear 16, the driven bevel gear 12, and the outer cylinder 6. The outer cylinder 6 no longer rises and falls, and the height of the cutter head 9 is fixed. During grass cutting, the drive module 2 is activated, which drives the rotating shaft 4 to rotate. The rotating shaft 4, through the cooperation of the first connecting key 10 and the first sliding groove 11, drives the inner rotating cylinder 5 to rotate. The inner rotating cylinder 5 drives the cutter head 9 to rotate. Due to the presence of the bearing 7, the rotation of the inner rotating cylinder 5 does not drive the outer cylinder 6 to rotate. The cutter head 9 rotates stably to achieve grass cutting.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A manually adjustable blade mower, comprising a frame (1), wherein a drive module (2) is fixedly mounted on the frame (1), characterized in that: The frame (1) is equipped with a height adjustment module (3) at the bottom. The height adjustment module (3) includes a rotating shaft (4) fixedly connected to the output end of the drive module (2). The rotating shaft (4) has an inner rotating cylinder (5) slidably fitted on its circumferential side. A cutter head (9) is fixedly installed at the bottom end of the inner rotating cylinder (5). An outer cylinder (6) is sleeved on the outer circumferential side of the inner rotating cylinder (5). A bearing (7) is fixedly installed between the inner rotating cylinder (5) and the outer cylinder (6). A collar (8) is threadedly connected to the outer circumferential side of the outer cylinder (6).

2. A manually adjustable blade mower according to claim 1, characterized in that, The rotating shaft (4) has a first connecting key (10) embedded on its circumferential side, and the inner rotating cylinder (5) has a first sliding groove (11) on its inner circumferential side. The first connecting key (10) and the first sliding groove (11) are slidably engaged.

3. A manually adjustable blade mower according to claim 2, characterized in that, The outer cylinder (6) is fitted with a driven bevel gear (12) on its outer peripheral side. Two symmetrical second connecting keys (13) are embedded in the inner peripheral side of the driven bevel gear (12). Two symmetrical second sliding grooves (14) are opened on the outer peripheral side of the outer cylinder (6). The two second connecting keys (13) slide in cooperation with the two second sliding grooves (14) respectively.

4. A manually adjustable blade mower according to claim 3, characterized in that, The bottom of the frame (1) is fixedly connected to an isolation cover (15), the collar (8) is fixedly installed inside the top of the isolation cover (15), and the driven bevel gear (12) is rotatably installed inside the bottom of the isolation cover (15).

5. A manually adjustable blade mower according to claim 4, characterized in that, The driven bevel gear (12) is meshed with the driving bevel gear (16) on its outer peripheral side, and a connecting rod (17) that penetrates the side wall of the isolation cover (15) is fixedly connected to one side of the driving bevel gear (16).

6. A manually adjustable blade mower according to claim 5, characterized in that, A handle (18) is fixedly connected to one end of the connecting rod (17) away from the driving bevel gear (16), and a shaft lock (19) is sleeved on the periphery of the connecting rod (17) and fixedly installed on the outer wall of the frame (1).

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