Damping mower transmission assembly

Abstract

The utility model relates to a damping mower gearbox assembly, which mainly comprises a gearbox, a small belt pulley, an expansion sleeve and a cutting board assembly, the gearbox is fixed on the cutting board assembly, and the small belt pulley and the expansion sleeve are fixed on a shaft on the other side of the gearbox at one time; the knife board assembly comprises a knife rest plate, a clamping plate welding piece, a gearbox connecting sleeve, blades, a pad bowl and a spacer bush, the clamping plate welding piece penetrates through an unthreaded hole in the knife rest plate through a screw to be fixedly connected with the gearbox connecting sleeve, and a downward spline shaft, perpendicular to the ground, of a gearbox is connected with the gearbox connecting sleeve; and the blade sequentially passes through the spacer bush, the knife rest plate and the pad bowl through a bolt and is locked by a thin nut. The problems that in the using process of the transmission, parts loosen or fall off to cause sliding or slipping, a large amount of noise is generated in the working process, the abrasion, oxidation, corrosion and fatigue degree of nuts and related parts is low, and the service life of the transmission is too short due to part abrasion and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mowing equipment, in particular to a shock-absorbing transmission assembly of a lawn mower. Background Art

[0002] In the early development process of lawn mowers, the application of transmissions was not widespread. Early lawn mowers mostly adopted a single fixed-speed design, which could not meet the mowing requirements in different lawn environments. However, with the progress of technology and the increasing requirements for the functions of lawn mowers, the transmission has gradually become one of the standard configurations of lawn mowers. As a device for adjusting the blade speed of a lawn mower, the design of the transmission enables users to select the appropriate blade speed according to different mowing requirements, and can adapt to lawns of different heights, grass clusters of different densities, and even the growth conditions of lawns in different seasons, achieving higher efficiency and better mowing effects.

[0003] However, when the lawn mower is working, the transmission may slip or skid, resulting in unstable blade speed or failure to achieve the expected effect; a large amount of noise is also generated during operation, affecting the user experience; at the same time, due to the internal structure design of the transmission and component wear, etc., the service life of the transmission is too short and requires timely maintenance. Therefore, a shock-absorbing transmission assembly of a lawn mower is proposed to solve the above-mentioned problems. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a shock-absorbing transmission assembly of a lawn mower, which solves the problems such as slipping or skidding of the transmission, short service life of the transmission, and large noise.

[0005] To achieve the above object, the utility model provides the following technical solutions: A shock-absorbing transmission assembly of a lawn mower mainly includes a gearbox, a small pulley, a tension sleeve, and a cutter plate assembly. The gearbox is fixed on the cutter plate assembly, and the small pulley and the tension sleeve are fixed on the shaft on the other side of the gearbox in sequence; the cutter plate assembly includes a cutter holder plate, a splint welding assembly, a gearbox connecting sleeve, a blade, a screw, a washer bowl, a thin nut, a spacer sleeve, and a bolt. The splint welding assembly is fixedly connected to the gearbox connecting sleeve through the screw passing through the clearance hole on the cutter holder plate. The splined shaft of the gearbox vertically downward is connected to the gearbox connecting sleeve, and at the same time, the top of the splined shaft of the gearbox is locked with a nut to prevent the cutter plate assembly from falling off the gearbox; the blades are installed at both ends of the cutter holder plate, and the blades pass through the spacer sleeve, the cutter holder plate, and the washer bowl in sequence through a bolt, and are locked with a thin nut.

[0006] Further, the outside of the washer bowl is made of steel, providing good protection and support, preventing parts from being corroded and damaged by the external environment. A layer of rubber is coated on the inner circle of the washer bowl, which can provide functions such as buffering, anti-loosening, waterproof and dustproof, shock absorption, and friction reduction, protecting the integrity and reliability of the thin nut and the connection part.

[0007] Further, the blade is provided with a plurality of square light holes corresponding to the circular holes on both sides of the tool rest plate to ensure the correct installation and fixation of the blade and the tool rest plate.

[0008] Further, the material of the spacer sleeve is rubber or plastic, which reduces the vibration transmission generated by cutting or scratching, reduces the noise generated by the direct contact between the blade and the tool rest plate, and at the same time avoids the scratches and damages caused by the direct contact between the blade and the tool rest plate, thereby prolonging the service life.

[0009] Further, the shape of the position of the bolt fixed to the blade is square and is matched with the square hole in the blade so as to correctly position the blade and prevent loosening caused by long-term use, resulting in the rotation of the blade during the mowing process and unable to achieve a good mowing effect.

[0010] Further, when the bolt is fixedly connected to the thin nut, there are 2 thin nuts, and the 2 thin nuts play a locking role. At the same time, it is required that the total height of the 2 thin nuts is not higher than the internal height of the cushion bowl to play a protective role.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. The present utility model can effectively fix the nut, prevent it from loosening or falling off during vibration or use, avoid sliding or slipping, maintain the normal operation state of the transmission, make the blade speed stable and achieve the expected effect.

[0013] 2. The present utility model can disperse the force around the nut to a larger surface area, reduce the local pressure, and at the same time, the provided spacer sleeve and cushion bowl can slow down the vibration noise, thereby reducing the wear and fatigue of the nut and related components, and helping to prolong the service life of the nut and the transmission.

[0014] 3. It can shock-absorb and buffer the collision force between the blade and the tool rest plate, effectively reduce the impact force, prolong the service life of the blade and the tool rest plate, and also help to stabilize the position of the blade and ensure its normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model.

[0016] Figure 2 is a schematic diagram of the structural disassembly of the inner tool rest plate assembly of the present utility model.

[0017] In the figure: 1 transmission, 2 small pulley, 3 expansion sleeve, 4 tool rest plate assembly, 5 bolt, 6 tool rest plate, 7 splint welding assembly, 8 gearbox connection sleeve, 9 blade, 10 screw, 11 cushion bowl, 12 thin nut, 13 spacer sleeve. SPECIFIC IMPLEMENTATION METHOD

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings.

[0020] Embodiment: As Figure 1 - Figure 2 shown, the shock-absorbing mower transmission assembly in this embodiment mainly includes a gearbox 1, a small pulley 2, a tensioning sleeve 3, and a cutter plate assembly 4. The gearbox 1 is fixed on the cutter plate assembly 4, and the small pulley 2 and the tensioning sleeve 3 are successively fixed on the shaft on the other side of the gearbox 1; the cutter plate assembly 4 includes a cutter holder plate 6, a clamping plate welded part 7, a gearbox connecting sleeve 8, a blade 9, a screw 10, a washer bowl 11, a thin nut 12, a spacer sleeve 13, and a bolt 5. The clamping plate welded part 7 is fixedly connected to the gearbox connecting sleeve 8 through the screw 10 passing through the light hole on the cutter holder plate 6. The splined shaft of the gearbox 1 perpendicular to the ground is connected to the gearbox connecting sleeve 8, and at the same time, the top of the splined shaft of the gearbox 1 is locked with a nut to prevent the cutter plate assembly 4 from falling off the gearbox 1; the cutter holder plate 6 is equipped with blades 9 at both ends. The blades ⑨ are successively passed through the spacer sleeve 13, the cutter holder plate 6, and the washer bowl 11 by 3 bolts and locked with a thin nut 12; the outside of the washer bowl 11 is made of steel, providing good protection and support, preventing parts from being corroded and damaged by the external environment. A layer of rubber is coated on the inner circle of the washer bowl 11, which can provide functions such as buffering, anti-loosening, waterproof and dustproof, shock absorption, and friction reduction, protecting the integrity and reliability of the thin nut 12 and the connection part; the blade 9 is provided with a plurality of square light holes corresponding to the circular holes on both sides of the cutter holder plate 6 to ensure the correct installation and fixation of the blade 9 and the cutter holder plate 6; the material of the spacer sleeve 13 is rubber or plastic, reducing the vibration transmission generated by cutting or scraping, reducing the noise generated by the direct contact between the blade 9 and the cutter holder plate 6, and at the same time avoiding scratches and damage caused by the direct contact between the blade 9 and the cutter holder plate 6, extending the service life; the shape of the position of the bolt 5 fixed to the blade 9 is square and matches the square hole in the blade 9 to facilitate the correct positioning of the blade 9 and prevent loosening caused by long-term use, resulting in the blade rotating during mowing and not achieving a good mowing effect; when the bolt 5 is fixedly connected to the thin nut 12, there are 2 thin nuts 12. The 2 thin nuts play a locking role, and at the same time, the total height of the 2 thin nuts 12 is required not to be higher than the inner height of the washer bowl 11 to play a protective role.

[0021] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0022] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the technical solutions. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions shall be covered by the scope of the claims of the present invention.

Claims

1. The shock-absorbing lawn mower transmission assembly mainly consists of a gearbox (1), a small pulley (2), a tension sleeve (3), and a cutter plate assembly (4), and is characterized in that: The transmission gearbox (1) is fixed on the tool plate assembly (4), and the small pulley (2) and the expansion sleeve (3) are fixed on the shaft on the other side of the transmission gearbox (1) at one time; the tool plate assembly (4) includes a tool rest plate (6), a clamping plate welded assembly (7), a gearbox connecting sleeve (8), a blade (9), a screw (10), a washer bowl (11), a thin nut (12), a spacer sleeve (13), and a bolt (5). The clamping plate welded assembly (7) is fixedly connected to the gearbox connecting sleeve (8) through the screw (10) passing through the clearance hole on the tool rest plate (6). The splined shaft of the transmission gearbox (1) vertically downward to the ground is connected to the gearbox connecting sleeve (8), and at the same time, the top end of the splined shaft of the transmission gearbox (1) is locked by a nut. The blades (9) are installed at both ends of the tool rest plate (6). The blades (9) pass through the spacer sleeve (13), the tool rest plate (6), and the washer bowl (11) in sequence through 3 bolts (5), and are locked with the thin nut (12).

2. The shock-absorbing lawn mower transmission assembly according to claim 1, wherein: The outer part of the washer bowl (11) is made of steel, and a layer of rubber is coated on the inner circle of the washer bowl (11).

3. The shock-absorbing lawn mower transmission assembly according to claim 1, wherein: The blade (9) is provided with ≥3 square clearance holes corresponding to the circular holes on both sides of the tool rest plate (6).

4. The shock-absorbing lawn mower transmission assembly according to claim 1, wherein: The material of the spacer sleeve (13) is rubber or plastic.

5. The shock-absorbing lawn mower transmission assembly according to claim 1, wherein: The shape of the position of the bolt (5) fixed to the blade (9) is square and is matched with the square hole in the blade (9).

6. The shock-absorbing lawn mower transmission assembly according to claim 1, wherein: When the bolt (5) is fixedly connected to the thin nut (12), there are 2 thin nuts (12), and at the same time, the total height of the 2 thin nuts (12) is required not to be higher than the inner height of the washer bowl (11).

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