A lawnmower with a floating blade.

Abstract

This utility model discloses a lawnmower with a floating blade disc, including a housing. The housing has a downward-opening blade disc assembly receiving compartment. The blade disc assembly includes a motor housed within a motor housing and a blade disc fixed to the motor's output shaft. The blade disc is located at the bottom of the motor. The outer wall of the motor housing has motor housing lugs that cooperate with a height adjustment component. A sliding member is fixed to the side wall of the motor housing, and the side wall of the blade disc assembly receiving compartment has guide rails for the sliding member to slide up and down. This utility model's lawnmower with a floating blade disc allows the blade disc to float while saving installation space.

Description

Technical Field

[0001] This utility model relates to a lawnmower with a floating blade, belonging to the field of garden tool technology. Background Technology

[0002] In the current field of mechanical equipment, especially for the design of the floating blade holder in lawnmower robots, the commonly used approach is a vertical parallel movement mechanism composed of hinges between links. This structure mainly relies on a parallel four-bar linkage to achieve the floating function of the blade holder, ensuring that the lawnmower can maintain a stable cutting height on uneven ground.

[0003] However, these existing design solutions have some obvious flaws and challenges:

[0004] 1. Large space occupation: Due to the need to use a four-bar linkage to achieve the floating function of the blade holder, the overall size of the blade holder is relatively large, thus occupying valuable installation space inside the lawnmower.

[0005] 2. Problem of weeds hiding: The large size of the connecting rod and the space reserved to allow it to move up and down can easily cause weeds to remain inside the equipment after cutting, affecting the cleanliness and long-term performance of the equipment.

[0006] 3. Higher cost: The complex parallel four-bar articulated design not only increases manufacturing costs, but also places higher demands on production and assembly, further increasing the overall cost of the product.

[0007] 4. Reliability Issues: The complexity of the parallel four-bar structure and the cumbersome installation process result in low reliability for the system. Wear or misalignment of any component can lead to the failure of the entire floating system, thereby affecting mowing performance.

[0008] The root cause of these problems lies in the fact that in existing designs, the suspended blade holder must be much larger than the lawnmower blade head to allow sufficient range of motion for the linkage, ensuring smooth vertical movement of the blade holder. This not only limits the compactness and efficiency of the design but also introduces the aforementioned inconveniences and challenges in practical operation. Therefore, improving existing suspended blade holder designs and seeking more effective, reliable, and economical solutions has become an urgent issue for the industry. Utility Model Content

[0009] The purpose of this invention is to overcome the problems existing in the prior art and provide a lawnmower with a floating blade, which can make the blade float while saving installation space.

[0010] To solve the above technical problems, this utility model provides a lawnmower with a floating blade disc, including a housing. The housing has a downward-opening blade disc assembly receiving compartment. The blade disc assembly includes a motor housed in a motor housing and a blade disc fixed to the motor output shaft. The blade disc is located at the bottom of the motor. The feature is that the outer wall of the motor housing has a motor housing lug that cooperates with a height adjustment component, a sliding member is fixed to the side wall of the motor housing, and the side wall of the blade disc assembly receiving compartment has a guide rail for the sliding member to slide up and down.

[0011] Furthermore, the height adjustment component includes a height adjustment knob and a lead screw. The lead screw is sleeved inside a lead screw cover with a longitudinal groove. A lead screw nut connector that slides up and down along the lead screw is sleeved on the lead screw. The lead screw nut connector extends out of the longitudinal groove of the lead screw cover and overlaps the motor cover lug.

[0012] Furthermore, two sliding members are symmetrically provided on the outer wall of the motor housing, and the sliding members are sliding trolleys.

[0013] Furthermore, the sliding trolley includes a support frame and pulleys fixed at the four corners of the support frame. The pulleys abut against the side wall of the guide rail and slide along the side wall of the guide rail.

[0014] Furthermore, a spring is hooked onto the top wall of the cutter head assembly housing, and the other end of the spring is hooked onto the support frame of the sliding trolley.

[0015] Furthermore, the spring is provided in two parts, which are hooked together and hung on the sliding trolley on the other side.

[0016] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. The optimized internal layout makes the overall shape of the lawnmower more compact, which is convenient for storage and operation, and also increases the ease of use.

[0017] 2. The use of injection-molded parts to replace the traditional parallel four-bar structure, and the design of directly generating the tool holder guide rail on the lower shell, effectively reduces material costs and assembly complexity, thereby reducing overall production costs.

[0018] 3. Reducing the number and complexity of moving parts helps improve the reliability and durability of equipment and reduces the failure rate due to component wear or misalignment.

[0019] 4. The new design reduces the space for hiding weeds, making the lawnmower easier to clean and maintain, extending the equipment's lifespan, and maintaining long-term stable performance. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The drawings are provided for reference and illustration only and are not intended to limit the present invention.

[0021] Figure 1 This is a perspective view of the present invention without the cutter head assembly;

[0022] Figure 2 This is a partial cross-sectional view of the cutter head of this utility model at its highest point.

[0023] Figure 3 This is a partial cross-sectional view of the cutter head of this utility model at its lowest point.

[0024] Figure 4 This is the main view of the cutter head assembly;

[0025] Figure 5 for Figure 4 The right view.

[0026] In the diagram: 1. Housing, 2. Cutter head assembly housing, 3. Motor, 4. Cutter head, 5. Motor housing, 5a. Motor housing lug, 6. Sliding component, 6a. Support frame, 6b. Pulley, 7. Guide rail, 8. Height adjustment knob, 9. Lead screw, 10. Lead screw housing, 11. Lead screw nut connector, 12. Spring. Detailed Implementation

[0027] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0029] like Figures 1 to 3 As shown, this utility model provides a lawnmower with a floating blade disc, including a housing 1. The housing 1 has a blade disc assembly receiving chamber 2 with the opening facing downward. The blade disc assembly includes a motor 3 housed in a motor housing 5 and a blade disc 4 fixed to the output shaft of the motor 3. The blade disc 4 is located at the bottom of the motor 3. The outer wall of the motor housing 5 is provided with motor housing lugs 5a. A sliding member 6 is fixed to the side wall of the motor housing 5. The side wall of the blade disc assembly receiving chamber 2 is provided with a guide rail 7 for the sliding member 6 to slide up and down.

[0030] like Figure 2 and Figure 3As shown, the height adjustment assembly includes a height adjustment knob 8 and a lead screw 9. The height adjustment knob 8 is fixed to the upper end of the lead screw 9. The lead screw 9 is sleeved inside the lead screw cover 10 with a longitudinal groove. A lead screw nut connector 11 that moves up and down along the lead screw 9 is sleeved on the lead screw 9. The lug of the lead screw nut connector 11 extends out of the longitudinal groove of the lead screw cover 10 and is connected to the motor cover lug 5a.

[0031] Two sliding parts 6 are symmetrically arranged on the outer wall of the motor housing 5. The sliding parts 6 are sliding trolleys, and the symmetrical arrangement ensures the balance of the cutter head.

[0032] like Figure 4 and Figure 5 As shown, the sliding trolley includes a support frame 6a and pulleys 6b fixed at the four corners of the support frame 6a. The pulleys 6b abut against the side wall of the guide rail 7 and slide along the side wall of the guide rail 7.

[0033] A spring 12 is hooked onto the top wall of the cutter head assembly housing 2, and the other end of the spring 12 is hooked onto the support frame 6a of the sliding trolley. Two springs 12 are provided, and the two springs 12 are cross-hooked onto the sliding trolley on the other side. The springs 12 are used to reduce the impact on the cutter head.

[0034] This invention uses injection-molded parts to replace the traditional four-bar linkage structure and directly generates the blade holder guide rail in the lower shell, effectively reducing material costs and assembly complexity, thereby reducing overall production costs. Reducing the number and complexity of moving parts helps improve the reliability and durability of the equipment, lowering the failure rate due to component wear or misalignment. The new design reduces the space for hiding weeds, making the lawnmower easier to clean and maintain, extending the equipment's lifespan, and maintaining long-term stable performance.

[0035] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A lawnmower having a floating cutter deck, comprising a housing provided with an open downwardly facing cutter assembly receiving bay, a cutter assembly comprising a motor housed within a motor housing and a cutter deck fixed to the lower end of the motor output shaft, characterised in that: The outer wall of the motor housing is provided with motor housing lugs that cooperate with the height adjustment component. The side wall of the motor housing is also fixed with a sliding component. The inner side wall of the cutter head assembly receiving chamber is provided with a guide rail for the sliding component to slide up and down.

2. A lawnmower with a floating blade disc according to claim 1, characterized in that: The height adjustment assembly includes a height adjustment knob and a lead screw. The height adjustment knob is fixed to the upper end of the lead screw, which is located in a lead screw cover. The side wall of the lead screw cover has a hollowed-out longitudinal groove. A lead screw nut connector that moves up and down along the lead screw is screwed onto the lead screw. The lug of the lead screw nut connector extends out of the longitudinal groove of the lead screw cover and is connected to the lug of the motor cover.

3. A lawnmower with a floating blade disc according to claim 1, characterized in that: The sliding component is a sliding trolley, and two of them are symmetrically arranged on the outer wall of the motor housing.

4. A lawnmower with a floating blade disc according to claim 3, characterized in that: The sliding trolley includes a support frame and pulleys fixed at the four corners of the support frame. The pulleys abut against the side wall of the guide rail and slide along the side wall of the guide rail.

5. A lawnmower with a floating blade disc according to claim 4, characterized in that: A spring is hooked to the top wall of the cutter head assembly housing, and the other end of the spring is hooked to the support frame of the sliding trolley.

6. A lawnmower with a floating blade disc according to claim 5, characterized in that: The spring is provided in two parts, and the two springs are hooked together and hung on the sliding trolley on the other side.

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