Transmission structure for mower and mower

Abstract

The utility model discloses a hay mower transmission structure and hay mower relates to mechanical transmission structure technical field, including driving shaft, transmission shaft, driving gear and driven gear, be equipped with transmission subassembly between driving shaft and driving gear or / and transmission shaft and driven gear, transmission subassembly includes elastic part and plug-in part, and the elastic part is equipped with the elastic part and the plug-in part. One of the driving shaft and the driving gear is provided with an elastic part, the other one of the driving shaft and the driving gear is provided with an inserting part, the elastic part is matched with the inserting part in an inserting manner, so that the driving shaft and the driving gear can synchronously rotate, and / or one of the transmission shaft and the driven gear is provided with an elastic part, the other one of the transmission shaft and the driven gear is provided with an inserting part, and the elastic part is matched with the inserting part in an inserting manner; the transmission shaft and the driven gear can rotate synchronously. The problem that a transmission structure is prone to damage is solved, the risk that the transmission structure is abraded and damaged due to the fact that impact load is too large is reduced, and the service life of the mower is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission structures, in particular to a transmission structure for a lawn mower and the lawn mower. Background Art

[0002] A lawn mower is a mechanical device used to trim lawns. To facilitate user operation, current lawn mowers are generally electrically driven. A lawn mower primarily comprises a cutting assembly and a drive member for driving the cutting assembly. A gear transmission structure is typically installed between the cutting assembly and the drive member. The gear transmission structure is used to transmit power from the drive member to the cutting assembly, and the gear transmission structure can increase the output torque, enabling the cutting assembly to cut more efficiently. In the prior art, a gear transmission structure includes intermeshing driving and driven gears, as well as a connecting assembly. The connecting assembly is used to connect the driving gear to the drive member, and the driven gear to the cutting assembly, thereby transmitting power between the drive member and the cutting assembly. However, during the use of the lawn mower, the cutting assembly is prone to abutment with hard objects or entanglement with grass, causing the lawn mower to stall. That is, the hard object or grass will apply a large reverse torque to the cutting assembly so that the cutting assembly cannot rotate, and the driven gear cannot rotate under the action of the reverse torque, while the driving member still transmits power to the driven gear through the driving gear. The driven gear will hinder the rotation of the driving gear, and a large impact load will be generated between the driving gear and the driven gear. The large impact load can easily cause wear or damage to the gear transmission structure, thereby reducing the service life of the lawn mower. Therefore, there is room for improvement. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the utility model provides a transmission structure for a lawn mower and a lawn mower, which reduces the risk of wear and damage to the transmission structure caused by excessive impact loads and increases the service life of the lawn mower.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A transmission structure for a lawn mower, comprising a drive shaft, a transmission shaft, and a driving gear and a driven gear that mesh with each other, the drive shaft being transmission-connected to the driving gear, the transmission shaft being transmission-connected to the driven gear, a transmission assembly being provided between the drive shaft and the driving gear or / and between the transmission shaft and the driven gear, the transmission assembly comprising an elastic portion and a plug-in portion, one of the drive shaft and the driving gear being provided with the elastic portion, the other being provided with the plug-in portion, the elastic portion being plug-fitted to the plug-in portion so that the drive shaft and the driving gear can rotate synchronously, and / or one of the transmission shaft and the driven gear being provided with the elastic portion, the other being provided with the plug-in portion, the elastic portion being plug-fitted to the plug-in portion so that the drive shaft and the driven gear can rotate synchronously.

[0006] In the above technical solution, when this transmission structure is applied to a lawn mower, when the lawn mower is operating normally, the driving member is transmitted to the drive shaft, and the drive shaft is connected to the driving gear, the driving gear is meshed with the driven gear, and the driven gear is connected to the transmission shaft, so that power can be transmitted to the transmission shaft, that is, the working torque generated by the driving member is transmitted to the transmission shaft, and the transmission shaft is connected to the cutting assembly, so that the cutting assembly can perform cutting work, thereby realizing the normal operation of the lawn mower; when the lawn mower is blocked, that is, the cutting assembly cannot rotate and cannot work normally, the cutting assembly will apply a reverse torque to the transmission shaft to limit the rotation of the transmission shaft, while the driving member is still transmitted to the drive shaft, that is, the transmission shaft will The driven gear will be hindered from rotating and the driving gear will hinder the rotation of the driving shaft, wherein the transmission assembly is used to realize the transmission between the driving shaft and the driving gear or / and between the transmission shaft and the driven gear, and the transmission assembly includes an elastic part and a plug-in part that are plug-fitted, so that the elastic part will abut against the plug-in part and undergo elastic deformation, thereby providing a buffer space for the driving gear and / or the driven gear, and the elastic part will absorb part of the impact load generated between the driving gear and the driven gear, thereby reducing the impact load between the driving gear and the driven gear, reducing the risk of wear and damage to the transmission structure due to excessive impact load, and improving the ability of the lawn mower to resist impact loads, thereby improving the service life of the lawn mower.

[0007] Preferably, the tooth top circle diameter of the driving gear is smaller than the tooth top circle diameter of the driven gear, and the transmission assembly is arranged between the transmission shaft and the driven gear.

[0008] In the structure, the tooth top circle diameter of the driving gear is smaller than the tooth top circle diameter of the driven gear, thereby increasing the output torque transmitted to the cutting assembly by the driving member, thereby enabling the cutting assembly to cut more effectively; in addition, compared with installing it between the driving gear and the driving shaft, installing it between the transmission shaft and the driven gear with a larger tooth top circle diameter makes it easier to process and assemble the transmission assembly; furthermore, the transmission assembly installed between the transmission shaft and the driven gear can absorb more impact loads than installing it between the driving gear and the driving shaft, that is, the buffering effect of the transmission structure is guaranteed while simplifying the processing and installation steps.

[0009] Preferably, the elastic portion includes a plurality of protrusions, and the plug-in portion is a plurality of grooves corresponding one-to-one to the protrusions, or the elastic portion includes a plurality of grooves with elastic groove walls, and the plug-in portion is a plurality of protrusions corresponding one-to-one to the grooves.

[0010] In the structure, multiple bumps and grooves are provided to improve the ability of the elastic part to absorb impact energy, thereby ensuring the buffering capacity of the elastic part, further reducing the risk of wear and damage to the transmission structure due to excessive impact loads, that is, further improving the ability of the lawn mower to resist impact loads, thereby increasing the service life of the lawn mower.

[0011] Preferably, the groove has a notch, and the circumferential outer wall of the protrusion is in conflict with the groove walls on both sides of the notch.

[0012] In the structure, the circumferential outer wall of the protrusion contacts the groove walls on both sides of the groove, ensuring the stability of the connection between the driving gear and the drive shaft or the driven gear and the transmission shaft, and ensuring the stability of the transmission of the protrusion and the groove during the normal transmission process of the transmission structure, reducing the risk of shaking between the driving gear and the drive shaft or between the driven gear and the transmission shaft during the transmission process, thereby improving the stability of the transmission structure in use.

[0013] Preferably, the groove has a notch, and the distance between the groove walls on both sides of the groove increases gradually in the direction away from the notch.

[0014] In the structure, the distance between the groove walls on both sides of the groove increases gradually in the direction away from the groove opening, thereby increasing the contact area between the protrusion and the groove wall, thereby effectively dispersing stress, reducing local stress concentration, and reducing the risk of wear or damage to the protrusion or the groove wall, thereby improving the service life of the transmission structure; in addition, the larger contact area between the protrusion and the groove wall makes the elastic deformation of the elastic part closer to linear elastic deformation, thereby improving the buffering effect of the transmission component.

[0015] Preferably, the circumferential side walls of the protrusion and the groove walls of the groove are both arranged in the form of arc surfaces.

[0016] In the structure, the circumferential side walls of the protrusion and the groove walls of the groove are both arranged in arc surfaces, which makes it easier to transfer torque between the protrusion and the groove, reduces the energy loss of the transmission structure during the transmission process, and thus improves the transmission efficiency of the transmission structure.

[0017] Preferably, the groove has a groove bottom, and a deformable gap exists between the groove bottom and an end of the protrusion close to the groove bottom.

[0018] In the structure, there is a deformable gap between the groove bottom and the end of the protrusion close to the groove bottom, which provides a radial deformation space for the elastic part, so that the elastic part can be closer to linear elastic deformation when it undergoes elastic deformation, thereby improving the buffering effect of the transmission component.

[0019] Preferably, the transmission assembly further includes a connecting member, the elastic portion is provided on the connecting member, one of the drive shaft and the driving gear or the transmission shaft and the driven gear is detachably connected to the connecting member and can rotate synchronously circumferentially, and the other is provided with the plug-in portion.

[0020] In the structure, the connecting member is connected to one of the transmission shaft and the driven gear, and the elastic part is plugged into the plug-in part to ensure normal transmission between the driven gear and the transmission shaft. At the same time, the connecting member is detachable, and the elastic part is installed on the connecting member, so that the connecting member and the elastic part are replaceable. Therefore, different connecting members and elastic parts can be replaced according to different usage requirements, so that the transmission structure can be applied to more usage situations, thereby improving the practicality of the transmission structure; in addition, when the elastic part needs to be replaced, the remaining structure can continue to be reused subsequently, thereby reducing the use cost of the transmission structure.

[0021] Preferably, the connecting piece is made of elastic material.

[0022] In the structure, the elastic part and the connecting piece are both made of elastic material, so the elastic part and the connecting piece can be integrally formed, which simplifies the production steps of the transmission structure and improves the convenience of production and processing of the transmission structure.

[0023] A lawn mower comprises a mounting frame, a driving member provided on the mounting frame, and a cutting assembly rotatably connected to the mounting frame, the lawn mower further comprising a transmission structure for a lawn mower according to any of the above-mentioned schemes, the mounting frame being provided with an accommodating cavity, the driving gear, the driven gear, the driving shaft, and the transmission shaft being rotatably connected within the accommodating cavity, the driving member transmitting power to the driving shaft, and the transmission shaft transmitting power to the cutting assembly.

[0024] In the above technical solution, since the lawn mower is equipped with the above-mentioned transmission structure for the lawn mower, the lawn mower has all the technical effects of the above-mentioned transmission structure for the lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a lawn mower according to one embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the overall cross-sectional structure of a lawn mower according to one embodiment of the present application;

[0027] Figure 3 is an exploded view of a lawn mower according to one embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of the assembly of the transmission structure of one embodiment of the present application;

[0029] Figure 5 is a top view of a driven gear in one embodiment of the present application;

[0030] Figure 6 This is a top view of the transmission structure of one embodiment of the present application;

[0031] Figure 7 This is a schematic structural diagram of a connector according to one embodiment of the present application;

[0032] Figure 8 This is a schematic structural diagram of a transmission shaft according to one embodiment of the present application.

[0033] Reference numerals:

[0034] 100. Mounting frame; 110. Driving member; 120. Cutting assembly; 121. Connecting shaft; 122. Blade; 130. Accommodating chamber; 131. Rotating bearing; 200. Driving shaft; 300. Transmission shaft; 310. Optical axis section; 320. Transmission section; 330. Limiting groove; 400. Driving gear; 500. Driven gear; 600. Transmission assembly; 610. Elastic portion; 611. Protrusion; 620. Inserting portion; 621. Groove; 6211. Notch; 6212. Groove bottom; 630. Connecting member; 631. Elastic sleeve; 6311. Accommodating hole; 6312. Connecting wall; 6313. Arc wall; 700. Deformation gap. DETAILED DESCRIPTION

[0035] A transmission structure for a lawn mower includes a drive shaft, a transmission shaft, and mutually meshing driving gears and driven gears. The drive shaft is in transmission connection with the driving gear, and the transmission shaft is in transmission connection with the driven gear. A transmission assembly is provided between the drive shaft and the driving gear or / and between the drive shaft and the driven gear. The transmission assembly includes an elastic portion and a plug-in portion. One of the drive shaft and the driving gear is provided with an elastic portion, and the other is provided with a plug-in portion. The elastic portion and the plug-in portion are plug-fitted together so that the drive shaft and the driving gear can rotate synchronously. And / or one of the drive shaft and the driven gear is provided with an elastic portion, and the other is provided with a plug-in portion. The elastic portion and the plug-in portion are plug-fitted together so that the drive shaft and the driven gear can rotate synchronously. The above-mentioned transmission structure for a lawn mower can reduce the risk of wear and damage to the transmission structure caused by excessive impact loads, thereby increasing the service life of the lawn mower.

[0036] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0040] Reference Figure 1 and Figure 2 , a lawn mower includes a mounting frame 100, a driving member 110 mounted on the mounting frame 100, and a cutting assembly 120 rotatably connected to the mounting frame 100.

[0041] Compared with the existing technology, Figure 3 and Figure 4 The lawn mower also includes a transmission structure for the lawn mower, including a drive shaft 200, a transmission shaft 300, and a driving gear 400 and a driven gear 500 that are meshed with each other. The drive shaft 200 is transmission-connected to the driving gear 400, and the transmission shaft 300 is transmission-connected to the driven gear 500. A transmission assembly 600 is provided between the drive shaft 300 and the driven gear 500. The transmission assembly 600 includes an elastic portion 610 and a plug-in portion 620. One of the drive shaft 300 and the driven gear 500 is provided with an elastic portion 610, and the other is provided with a plug-in portion 620. The elastic portion 610 is plugged into the plug-in portion 620 so that the drive shaft 300 and the driven gear 500 can rotate synchronously.

[0042] Reference Figure 2 、 Figure 3 and Figure 4 The mounting frame 100 has an accommodating cavity 130, and the driving gear 400, the driven gear 500, the driving shaft 200 and the transmission shaft 300 are all rotatably connected in the accommodating cavity 130. The driving member 110 transmits power to the driving shaft 200, and the transmission shaft 300 transmits power to the cutting assembly 120.

[0043] According to a lawn mower of this embodiment, when the lawn mower is operating normally, the driving member 110 transmits power to the driving shaft 200, the driving shaft 200 is connected to the driving gear 400, and the driving gear 400 is meshed with the driven gear 500, so that the driving shaft 200 transmits power to the driven gear 500 through the driving gear 400, and the elastic portion 610 is plugged into the plug-in portion 620 so that the driven gear 500 and the transmission shaft 300 can rotate synchronously in the circumferential direction, that is, the driven gear 500 can transmit power to the transmission shaft 300, and the transmission shaft 300 is transmitted to the cutting assembly 120 so that the cutting assembly 120 can work, thereby realizing the normal operation of the lawn mower; when the lawn mower is blocked, that is, the cutting assembly 120 cannot rotate, the cutting assembly 120 will apply a large reverse torque to the transmission shaft 300 to limit the transmission shaft 300 rotates, while the driving shaft 200 is still transmitted to the driven gear 500 through the driving gear 400, and the transmission shaft 300 will hinder the rotation of the driven gear 500, wherein the driven gear 500 and the transmission shaft 300 are plugged into and matched with the elastic portion 610 and the plug-in portion 620 to realize transmission. Therefore, when the transmission shaft 300 hinders the driven gear 500, the elastic portion 610 will abut against the plug-in portion 620 and undergo elastic deformation, thereby providing a buffer space for the driven gear 500, and the elastic portion 610 will absorb part of the impact load generated between the driving gear 400 and the driven gear 500, thereby reducing the impact load between the driving gear 400 and the driven gear 500, reducing the risk of wear and damage to the transmission structure due to excessive impact load, improving the ability of the lawn mower to resist impact loads, and thereby improving the service life of the lawn mower.

[0044] Reference Figure 2 、 Figure 3 and Figure 4 The driving member 110 adopts a conventional driving motor, and the output end of the driving motor is connected to one end of the driving shaft 200 so that the driving member 110 can transmit power to the driving shaft 200; the cutting assembly 120 includes a connecting shaft 121 and a plurality of blades 122 fixedly connected to the connecting shaft 121. The connecting shaft 121 is fixedly connected to one end of the transmission shaft 300 so that the transmission shaft 300 can transmit power to the cutting assembly 120, thereby enabling the transmission shaft 300 to drive the blades 122 to rotate for cutting.

[0045] Preferably, refer to Figure 2 、 Figure 3 and Figure 4 A rotating bearing 131 is installed between the drive shaft 200 and the transmission shaft 300 and the cavity wall of the accommodating cavity 130. The rotating bearing 131 can reduce the energy loss during the transmission process, thereby improving the transmission efficiency of the transmission structure.

[0046] In the above embodiment of the present utility model, the transmission assembly 600 can also be provided between the drive shaft 200 and the driving gear 400, one of the drive shaft 200 and the driving gear 400 is provided with an elastic portion 610, and the other is provided with a plug-in portion 620, the elastic portion 610 and the plug-in portion 620 are plugged into each other so that the drive shaft 200 and the driving gear 400 can rotate synchronously. For example, the circumferential side wall of the drive shaft 200 is fixedly connected with a plurality of protrusions 611, and the circumferential inner wall of the driving gear 400 begins to have grooves 621 corresponding to the protrusions 611 one by one, and the protrusions 611 are plugged into the corresponding grooves 621.

[0047] In the above embodiment of the present invention, two transmission assemblies 600 may be provided, and the two transmission assemblies 600 are respectively provided between the driving shaft 200 and the driving gear 400 and between the transmission shaft 300 and the driven gear 500 .

[0048] Reference Figure 2 、 Figure 3 and Figure 4 , the tooth top circle diameter of the driving gear 400 is smaller than the tooth top circle diameter of the driven gear 500, thereby increasing the output torque transmitted to the cutting assembly 120 by the driving member 110, thereby enabling the cutting assembly 120 to cut more effectively; in addition, in the above technical solution, the transmission assembly 600 is installed between the transmission shaft 300 and the driven gear 500, which is more convenient for processing and assembly of the transmission assembly 600 than being installed between the driving gear 400 and the driving shaft 200; furthermore, the transmission assembly 600 is installed between the transmission shaft 300 and the driven gear 500, which can absorb more impact loads than being installed between the driving gear 400 and the driving shaft 200, that is, the buffering effect of the transmission structure is guaranteed while simplifying the processing and installation steps.

[0049] Reference Figure 4 and Figure 5The elastic portion 610 includes four protrusions 611, and the plug-in portion 620 includes four grooves 621 corresponding to the protrusions 611. The four protrusions 611 and the four grooves 621 are spaced apart along the circumference of the driven gear 500 and the transmission shaft 300, respectively, and the protrusions 611 are plugged into and fit with the corresponding grooves 621. For example, the elastic portion 610 is mounted on the circumferential side wall of the transmission shaft 300, and the four protrusions 611 are evenly arranged along the circumference of the transmission shaft 300. The protrusions 611 are made of an elastic material such as rubber. The plug-in portion 620 is mounted on the circumferential inner wall of the driven gear 500, that is, the four grooves 621 are formed on the circumferential inner wall of the driven gear 500 and are evenly arranged along the circumference of the driven gear 500. The protrusions 611 and the grooves 621 are provided with multiple blocks to improve the ability of the elastic part 610 to absorb impact energy, thereby ensuring the buffering capacity of the elastic part 610, further reducing the risk of wear and damage to the transmission structure caused by excessive impact loads, that is, further improving the ability of the lawn mower to resist impact loads, thereby increasing the service life of the lawn mower.

[0050] In the above embodiment of the present invention, the elastic portion 610 may also be a plurality of grooves 621 having elastic walls, and the plug-in portion 620 may be a plurality of protrusions 611 corresponding one-to-one with the grooves 621. To provide elasticity to the groove walls of the grooves 621, an elastic pad may be installed on the groove walls of the grooves 621. The elastic pad is made of an elastic material such as rubber. The grooves 621 are plugged into and engaged with the protrusions 611. When the lawn mower stalls, the protrusions 611 abut against the elastic pad on the groove walls of the grooves 621, causing the elastic pad to deform elastically, thereby providing a radial buffer space for the driven gear 500. The elastic pad can absorb part of the impact load generated between the driving gear 400 and the driven gear 500. Alternatively, an elastic sleeve 631 may be installed on the driven shaft or the transmission shaft 300. The elastic sleeve 631 is made of an elastic material such as rubber, and the grooves 621 are formed on the elastic sleeve 631 to provide elasticity to the groove walls of the grooves 621.

[0051] In the above-mentioned embodiment of the present invention, the elastic portion 610 can also be installed on the circumferential inner wall of the driven gear 500, and the plug-in portion 620 can be installed on the circumferential side wall of the transmission shaft 300. For example, the four protrusions 611 are fixedly connected to the circumferential inner wall of the driven gear 500 and are evenly arranged along the circumference of the driven gear 500, and the four grooves 621 are opened on the circumferential side wall of the transmission shaft 300 and are evenly arranged along the circumference of the transmission shaft 300.

[0052] In the above embodiment of the present invention, the number of the protrusions 611 and the grooves 621 may also be three, five or six.

[0053] Preferably, the groove 621 has a notch 6211, and the circumferential outer wall of the protrusion 611 conflicts with the groove walls on both sides of the notch 6211. Figure 4 、 Figure 5 and Figure 6 The distance between the groove walls on both sides of the groove 6211 is smaller than the distance between the circumferential outer walls on both sides of the protrusion 611 at the groove 6211, thereby ensuring the stability of the connection between the driven gear 500 and the transmission shaft 300, and ensuring the stability of the transmission between the protrusion 611 and the groove 621 during the normal transmission process of the transmission structure, reducing the risk of shaking between the driven gear 500 and the transmission shaft 300 during the transmission process, thereby improving the stability of the transmission structure.

[0054] Preferably, refer to Figure 4 、 Figure 5 and Figure 6 The distance between the groove walls on both sides of the groove 621 increases gradually in the direction away from the groove opening 6211, thereby increasing the contact area between the protrusion 611 and the groove wall of the groove 621, thereby effectively dispersing stress, reducing local stress concentration, and reducing the risk of wear or damage to the protrusion 611 or the groove wall of the groove 621, thereby improving the service life of the transmission structure; in addition, the larger contact area between the protrusion 611 and the groove wall of the groove 621 makes it possible for the elastic part 610 to undergo elastic deformation closer to linear elastic deformation, thereby improving the buffering effect of the transmission assembly 600.

[0055] Furthermore, the circumferential side walls of the protrusion 611 and the groove walls of the groove 621 are both arranged in an arc surface, so that the elastic portion 610 is arranged in a petal shape, thereby making it easier to transmit torque between the protrusion 611 and the groove 621, reducing the energy loss of the transmission structure during the transmission process, and thereby improving the transmission efficiency of the transmission structure.

[0056] Preferably, refer to Figure 4 、 Figure 5 and Figure 6 The groove 621 has a groove bottom 6212, and there is a deformation gap 700 between the groove bottom 6212 and the end of the protrusion 611 close to the groove bottom 6212, thereby providing a radial deformation space for the elastic part 610, so that the elastic part 610 can be closer to a linear elastic deformation when it undergoes elastic deformation, thereby improving the buffering effect of the transmission component 600.

[0057] Preferably, the transmission assembly 600 further includes a connecting member 630, the elastic portion 610 is provided on the connecting member 630, one of the transmission shaft 300 and the driven gear 500 is detachably connected to the connecting member 630 and can rotate synchronously, and the other is provided with a plug-in portion 620. Figure 4 、 Figure 7 and Figure 8 , the connecting member 630 is located between the transmission shaft 300 and the driven gear 500, and the connecting member 630 is detachably mounted on the transmission shaft 300 and can rotate synchronously with the transmission shaft 300;

[0058] Furthermore, the connecting member 630 is made of elastic material. Figure 4 、 Figure 7 and Figure 8 , the connecting piece 630 adopts an elastic sleeve 631, and the elastic sleeve 631 adopts an elastic material such as rubber, and the protrusion 611 is fixedly connected to the circumferential outer wall of the elastic sleeve 631; the transmission shaft 300 includes an optical axis section 310 and a transmission section 320, wherein the transmission section 320 is formed by opening a limiting groove 330 on the circumferential side wall of the transmission shaft 300, and the circumferential inner wall of the elastic sleeve 631 is surrounded by a accommodating hole 6311 which is plugged into and matched with the transmission section 320, so that the elastic sleeve 631 is sleeved on the transmission shaft 300 and the elastic sleeve 631 forms a non-circular shaft hole with the transmission section 320, thereby ensuring that the connecting piece 630 and the transmission shaft 300 can transmit data while realizing a detachable connection between the connecting piece 630 and the transmission shaft 300; wherein the connecting piece 630 is connected to the transmission shaft 300, and the elastic part 610 is connected to the plug-in part The plug-in fit of 620 can ensure normal transmission between the driven gear 500 and the transmission shaft 300. At the same time, the elastic part 610 is installed on the connecting piece 630, so that the connecting piece 630 and the elastic part 610 are replaceable. Therefore, different connecting pieces 630 and elastic parts 610 can be replaced for driven gears 500 or transmission shafts 300 of different specifications, so that the transmission structure can be applied to more usage situations, thereby improving the practicality of the transmission structure; in addition, when the elastic part 610 needs to be replaced, the remaining structures can still be reused subsequently, thereby reducing the use cost of the transmission structure; furthermore, the elastic part 610 and the connecting piece 630 are both made of elastic materials, so the elastic part 610 and the connecting piece 630 can be integrally formed, which simplifies the production steps of the transmission structure and improves the convenience of production and processing of the transmission structure.

[0059] In the above embodiment of the present invention, the connecting member 630 may also be made of a non-elastic material. For example, the connecting member 630 may be a connecting sleeve, and the limiting groove 330 may extend from one end surface of the transmission shaft 300. Even if the transmission section 320 is located at one end of the transmission shaft 300, the connecting sleeve may cooperate with the transmission section 320 to form a non-circular shaft hole. In this way, while ensuring that transmission can be achieved between the connecting member 630 and the transmission shaft 300, a detachable connection between the connecting member 630 and the transmission shaft 300 is achieved.

[0060] Further, refer to Figure 7 and Figure 8The openings of the receiving holes 6311 are arranged in a polygonal shape, for example, in a quadrilateral shape. The wall of the receiving hole 6311 includes four connecting walls 6312 connected end to end, with adjacent connecting walls 6312 transitionally connected by arcuate walls 6313. The transition via the arcuate walls 6313 further facilitates torque transmission between the connector 630 and the transmission shaft 300, reduces energy loss during transmission of the transmission structure, and thereby improves the transmission efficiency of the transmission structure.

[0061] In the above embodiment of the present invention, the opening of the accommodating hole 6311 may also be arranged in a polygonal shape such as a pentagon or a hexagon.

[0062] In the above-mentioned embodiment of the present invention, the connecting member 630 can also be detachably mounted on the driven gear 500. For example, the connecting member 630 adopts an elastic sleeve 631, the protrusion 611 is fixedly connected to the circumferential inner wall of the elastic sleeve 631, the groove 621 is provided on the circumferential side wall of the transmission shaft 300, and the circumferential outer wall of the elastic sleeve 631 is fixedly connected with a plurality of clamping blocks. The circumferential inner wall of the driven gear 500 is provided with clamping grooves corresponding to the clamping blocks one by one, and the clamping blocks are engaged with the corresponding clamping grooves, thereby ensuring that the connecting member 630 and the driven gear 500 can transmit power while the connecting member 630 and the driven gear 500 are detachably connected.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A transmission structure for a lawn mower, comprising a drive shaft (200), a transmission shaft (300), and a driving gear (400) and a driven gear (500) meshing with each other, wherein the drive shaft (200) is in transmission connection with the driving gear (400), and the transmission shaft (300) is in transmission connection with the driven gear (500), characterized in that: A transmission assembly (600) is provided between the driving shaft (200) and the driving gear (400) or / and between the transmission shaft (300) and the driven gear (500). The transmission assembly (600) includes an elastic portion (610) and a plug-in portion (620). One of the driving shaft (200) and the driving gear (400) is provided with the elastic portion (610), and the other is provided with the plug-in portion (620). The elastic portion (610) and the plug-in portion (620) are connected to each other. The plug-in portion (620) is plugged in and matched to enable the drive shaft (200) and the driving gear (400) to rotate synchronously, and / or one of the transmission shaft (300) and the driven gear (500) is provided with the elastic portion (610), and the other is provided with the plug-in portion (620), and the elastic portion (610) and the plug-in portion (620) are plugged in and matched to enable the transmission shaft (300) and the driven gear (500) to rotate synchronously.

2. The transmission structure for a lawn mower according to claim 1, characterized in that: The tooth top circle diameter of the driving gear (400) is smaller than the tooth top circle diameter of the driven gear (500), and the transmission assembly (600) is arranged between the transmission shaft (300) and the driven gear (500).

3. The transmission structure for a lawn mower according to claim 1, characterized in that: The elastic portion (610) includes a plurality of protrusions (611), and the plug-in portion (620) is a plurality of grooves (621) corresponding one-to-one to the protrusions (611), or the elastic portion (610) includes a plurality of grooves (621) whose groove walls are elastic, and the plug-in portion (620) is a plurality of protrusions (611) corresponding one-to-one to the grooves (621).

4. The transmission structure for a lawn mower according to claim 3, characterized in that: The groove (621) has a notch (6211), and the circumferential outer wall of the protrusion (611) abuts against the groove walls on both sides of the notch (6211).

5. The transmission structure for a lawn mower according to claim 3, characterized in that: The groove (621) has a notch (6211), and the distance between the groove walls on both sides of the groove (621) increases in a direction away from the notch (6211).

6. The transmission structure for a lawn mower according to claim 3, characterized in that: The circumferential side wall of the protrusion (611) and the groove wall of the groove (621) are both arranged in an arc shape.

7. The transmission structure for a lawn mower according to claim 3, characterized in that: The groove (621) has a groove bottom (6212), and a deformable gap (700) exists between the groove bottom (6212) and an end of the protrusion (611) close to the groove bottom (6212).

8. The transmission structure for a lawn mower according to claim 1, characterized in that: The transmission assembly (600) further includes a connecting member (630), the elastic portion (610) being provided on the connecting member (630), one of the driving shaft (200) and the driving gear (400) or the transmission shaft (300) and the driven gear (500) being detachably connected to the connecting member (630) and capable of synchronous circumferential rotation, and the other being provided with the plug-in portion (620).

9. The transmission structure for a lawn mower according to claim 8, characterized in that: The connecting piece (630) is made of elastic material.

10. A lawn mower comprising a mounting frame (100), a driving member (110) disposed on the mounting frame (100), and a cutting assembly (120) rotatably connected to the mounting frame (100), characterized in that: The lawn mower further comprises a transmission structure for a lawn mower according to any one of claims 1 to 9, wherein the mounting frame (100) is provided with an accommodating cavity (130), the driving gear (400), the driven gear (500), the driving shaft (200) and the transmission shaft (300) are all rotatably connected in the accommodating cavity (130), the driving member (110) is driven by the driving shaft (200), and the transmission shaft (300) is driven by the cutting assembly (120).

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