Tensioning wheel adjusting device and mid-mounted mower

Abstract

This application relates to a tension wheel adjustment device and a centrally mounted lawnmower. The tension wheel adjustment device is used to adjust the position of the tension wheel inside the lawnmower. The tension wheel adjustment device includes a linkage component, which includes a curved rotary arm. The tension wheel is installed at one end of the rotary arm. A rotary central shaft is provided inside the lawnmower body. The rotary arm is connected to the rotary central shaft so that the rotary arm can bend and deflect around the rotary central shaft as a reference axis. An adjustment component is connected to the other end of the rotary arm. The adjustment component includes an anchoring plate and a tension spring connected between the rotary arm and the anchoring plate. The installation position of the tension spring relative to the anchoring plate is adjustable. The tension wheel, the rotary arm, and the transmission mechanism of the lawnmower are located inside the outer casing of the body.

Description

Technical Field

[0001] This application relates to the field of lawnmower technology, and more specifically, to a tension wheel adjustment device and a centrally mounted lawnmower. Background Technology

[0002] In the existing structure of lawnmowers, the tension wheel is mainly used to adjust the tension of the drive belt. It adjusts the belt tension by pressing and rubbing against the drive belt, and by changing the installation position.

[0003] In some existing structures, the change of the tensioner installation position is made by manual disassembly, and the adjustment of the transmission belt tension is redundant and cumbersome.

[0004] Meanwhile, in existing technologies that include linkage components and can change the position of the tensioner by reducing disassembly operations, the tensioner needs to be exposed outside the outer casing, which inevitably exposes running components such as drive wheels or drive belts to the outside of the outer casing as well.

[0005] This type of adjustment structure with linkage components is difficult to meet the requirements of applications with high safety requirements, increasing the safety hazards during use. Utility Model Content

[0006] The purpose of this application is to provide a tension wheel adjustment device and a centrally mounted lawnmower, which can adjust the position of the tension wheel by means of linkage and adjustment components while the running parts are hidden inside the outer cover, simplifying the adjustment operation of the transmission belt tension and enhancing the safety of use.

[0007] To achieve the above objectives, in a first aspect, this utility model provides a tension wheel adjustment device for adjusting the position of the tension wheel inside a lawnmower. The tension wheel adjustment device includes a linkage component, which includes a curved rotary arm, and the tension wheel is installed at one end of the rotary arm.

[0008] The lawnmower has a central axis of rotation inside its body, and the rotary arm is connected and installed on the central axis of rotation so that the rotary arm can bend and deflect with the central axis of rotation as the reference axis.

[0009] The other end of the slewing crank arm is connected to an adjustment component, which includes an anchoring plate and a tension spring connected between the slewing crank arm and the anchoring plate. The installation position of the tension spring relative to the anchoring plate is adjustable.

[0010] The tensioning wheel, the slewing arm, and the transmission mechanism of the lawnmower are located inside the outer casing of the machine body.

[0011] In an optional embodiment, the slewing crank arm includes a short section end and a long section end, the tensioning wheel is connected to the short section end, and the adjusting component is connected to the long section end.

[0012] In an optional embodiment, the slewing center shaft is connected to the bend of the slewing crank arm.

[0013] In an optional embodiment, the short section end is connected to a mounting shaft, the tension wheel is connected to the mounting shaft, the long section end is provided with a connecting piece, and the end of the tension spring is hooked onto the connecting piece.

[0014] In an optional embodiment, the anchoring bend is fixedly connected to the machine body, and the other end of the tension spring is connected to the anchoring bend via an adjusting bolt.

[0015] In an optional embodiment, an adjusting nut is connected to the adjusting bolt, and the anchoring bend plate is provided with a through hole for the adjusting bolt to pass through, with the adjusting nut located on both sides of the through hole.

[0016] In an optional embodiment, the tension spring includes a tension spring structure, and the end of the tension spring is attached to the end of the adjusting bolt.

[0017] In an optional embodiment, the outer cover is provided with an opening, the long section end protruding from the opening, and the opening having at least a length of space.

[0018] In an optional embodiment, the slewing arm includes a bent flat plate structure and is horizontally positioned below the drive belt.

[0019] Secondly, this utility model provides a centrally mounted lawnmower, including the tension wheel adjustment device described in any of the foregoing embodiments.

[0020] The tension wheel adjustment device in this invention can change the position of the tension wheel inside the outer casing of the machine without disassembling or assembling it, thereby adjusting the tension of the transmission belt by pressing it against the belt.

[0021] By placing the transmission and linkage components of the lawnmower body inside the outer casing, the exposed operating parts can be avoided, thus improving operational safety.

[0022] In this invention, the slewing structure of the slewing arm, combined with the pulling action of the tension spring and the adjustable installation position of the tension spring relative to the anchoring plate, can control the deflection angle of the slewing arm based on the slewing center axis, thereby changing the pressing position of the tensioning wheel on the transmission belt and thus adjusting the tension of the transmission belt.

[0023] By placing the tension wheel, slewing arm, and transmission mechanism of the lawnmower inside the outer casing, safety can be improved. In addition, the adjustable installation of the slewing arm with a tension spring located outside the casing allows for adjustment of the tension force from outside the casing, making it convenient to adjust the tension of the drive belt.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the internal structure of the tension wheel adjustment device in the centrally mounted lawnmower of this application;

[0027] Figure 2 This is a schematic diagram of the working structure of the slewing crank arm and the adjustment assembly after the outer cover is added.

[0028] icon:

[0029] 1- Lawn mower; 11- Outer casing; 12- Opening; 13- Drive belt;

[0030] 2-Linkage component; 21-Rotating crank arm; 21a-Short section end; 21b-Long section end; 22-Rotation center shaft; 23-Connecting plate;

[0031] 3-Tensioner; 31-Mounting shaft;

[0032] 4-Adjusting component; 41-Anchoring bend plate; 42-Tension spring; 43-Adjusting bolt; 44-Adjusting nut. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] The tensioner adjustment device in this application mainly makes the adjustment of the tension of the transmission belt 13 more convenient and safe by changing the structure and installation position of the tensioner adjustment device.

[0037] See Figures 1-2 The tension wheel adjustment device in this utility model is used to adjust the position of the tension wheel 3 inside the lawnmower 1, and adjust the tension of the transmission belt 13 by combining the state of the tension wheel 3 and the transmission belt 13 in tight contact and friction.

[0038] The position change adjustment of the tension wheel 3 is directly carried out through the linkage component 2 included in the tension wheel adjustment device. The linkage component 2 can rotate under the drive of the adjustment component 4 outside the outer cover 11, thereby driving the tension wheel 3 installed on the linkage component 2 to adjust its position.

[0039] The linkage component 2 includes a curved slewing arm 21. The adjustment component 4 outside the outer cover 11 adjusts the pulling degree of the linkage component 2 to make the slewing arm 21 deflect around the reference axis, thereby driving the tension wheel 3 to adjust its position.

[0040] The tension wheel 3 is specifically installed at one end of the rotary crank arm 21, while the adjustment component 4 is connected to the other end of the rotary crank arm 21. By pulling the other end of the rotary crank arm 21 through the adjustment component 4, the rotary crank arm 21 can be deflected around the reference axis, thereby driving the tension wheel 3 to make positional adjustments.

[0041] In order to enable the rotary arm 21 to deflect, a rotary center shaft 22 is provided inside the body of the lawnmower 1. The rotary arm 21 is connected and installed on the rotary center shaft 22 so that the rotary arm 21 can bend and deflect with the rotary center shaft 22 as the base point.

[0042] The other end of the slewing crank arm 21, as described above, is connected to the adjustment component 4. The adjustment component 4 includes an anchoring plate 41 fixedly connected to the outside of the outer cover 11 for anchoring, and a tension spring 42 connected between the slewing crank arm 21 and the anchoring plate 41. The tension spring 42 provides a relatively buffered tension force to pull the slewing crank arm 21, thereby adjusting the movement of the slewing crank arm 21 and maintaining its position under tension in a flexible and buffered tension manner.

[0043] By making the installation position of the tension spring 42 relative to the anchoring plate 41 adjustable, the tension of the tension spring 42 on the rotary crank arm 21 can be changed. In turn, under the action of the change in tension, the rotary crank arm 21 deflects around the reference axis, thereby adjusting the pressing position of the tension wheel 3 on the transmission belt 13 inside the outer cover 11, and realizing the adjustment of the tension of the transmission belt 13.

[0044] The tension wheel 3, the slewing arm 21, and the transmission mechanism of the lawnmower 1 are located inside the outer cover 11 of the machine body, which can prevent the running parts from being exposed relative to the outer cover 11. The tension of the slewing arm 21 can be adjusted by adjusting the installation position of the tension spring 42 located outside the outer cover 11.

[0045] In one specific embodiment, the slewing crank arm 21 includes a short section end 21a and a long section end 21b. The short section end 21a is connected to the tension wheel 3 mounting shaft 31. The tension wheel 3 is connected to the tension wheel 3 mounting shaft 31 via a bearing. Furthermore, the rim of the tension wheel 3 is in tight contact with the transmission belt 13. Through the action of the tight friction, the tension wheel 3 rotates synchronously with the transmission belt 13 on the slewing crank arm 21. During the deflection process, the slewing crank arm 21 drives the tension wheel 3 to adjust its position, thereby adjusting the tension of the transmission belt 13.

[0046] Starting from the deflection angle of the slewing crank arm 21, the adjusting component 4 is connected to the long section end 21b of the slewing crank arm 21. Furthermore, the slewing center shaft 22 is connected to the return bend of the slewing crank arm 21. By connecting the long section end 21b of the slewing crank arm 21 with the tension spring 42 included in the adjusting component, the slewing crank arm 21 can be deflected around the slewing center shaft 22 by changing the installation position of the tension spring 42 relative to the anchoring bend plate 41.

[0047] In this embodiment, the short section end 21a is connected to the tension wheel 3 mounting shaft 31. The tension wheel 3 is specifically connected to the tension wheel 3 mounting shaft 31 through a bearing, so as to maintain the rotation of the tension wheel 3 relative to the rotary crank arm 21 under the synchronous drive of the transmission belt 13.

[0048] From the connection angle of the tension spring 42 to the rotary crank arm 21, the long section end 21b is provided with a connecting piece 23, and the end of the tension spring 42 is hooked on the connecting piece 23 to maintain the tensioning action of the tension spring 42 on the rotary crank arm 21.

[0049] The anchoring plate 41 is fixedly connected to the machine body, which enables the anchoring plate 41 to effectively anchor the tension spring 42, while the other end of the tension spring 42 is connected to the anchoring plate 41 through the adjusting bolt 43.

[0050] Specifically, the distance between the tension spring 42 and the anchoring plate 41 can be adjusted by adjusting the connection position of the adjusting bolt 43 on the anchoring plate 41, thereby driving the rotary crank arm 21 to deflect.

[0051] Two adjusting nuts 44 are connected to the adjusting bolt 43. The anchoring plate 41 is provided with a through hole (not shown in the figure) for the adjusting bolt 43 to pass through. The outer diameter of the adjusting nut 44 is larger than the diameter of the through hole, and the adjusting nut 44 is located on both sides of the through hole.

[0052] Referring to the attached diagram, when the adjusting nut 44 located on the right side of the anchoring plate 41 is loosened in reverse, the adjusting bolt 43 moves to the left, which in turn causes the slewing arm 21 to rotate clockwise around the slewing center axis 22 as the reference axis, thereby causing the tensioning wheel 3 to move to the right, thus completing the loosening adjustment of the tension of the transmission belt 13.

[0053] Conversely, when the adjusting nut 44 located on the right side of the anchoring plate 41 is tightened in the forward direction, the adjusting bolt 43 moves to the right, which in turn causes the slewing crank arm 21 to rotate counterclockwise around the slewing center axis 22 as the reference axis, thereby causing the tensioning wheel 3 to move to the left, thus completing the tension adjustment of the transmission belt 13.

[0054] Regardless of the adjustment method, the two adjusting nuts 44 must be adjusted accordingly, in conjunction with the movement of the adjusting bolt 43 on the anchoring plate 41 and the locking of its position after movement.

[0055] The tension spring 42 in this utility model includes a tension spring structure, which can output a relatively flexible and buffered tension force. At the same time, the end of the tension spring 42 is hooked to the end of the adjusting bolt 43 that passes through the anchoring plate 41 and is close to the end of the tension spring 42. The tension spring 42 can be adjusted in position along with the adjusting bolt 43 while the position of the adjusting bolt 43 is adjusted.

[0056] Based on the structure described above where the adjustment component 4 is located outside the outer cover 11, the outer cover 11 of the machine body is provided with an opening 12, and the long section end 21b extends out of the opening 12 for the end of the tension spring 42 to be hooked, thereby facilitating a relatively safe adjustment operation outside the outer cover 11.

[0057] In order to allow the long section end 21b of the curved arm to deflect to a certain extent at the opening 12, the opening 12 has at least a length of space for the long section end 21b to move, so as to prevent jamming.

[0058] To reduce interference between the slewing crank arm 21 and the drive belt 13, the slewing crank arm 21 includes a bent flat plate structure and is horizontally positioned below the drive belt 13. This effectively utilizes the internal space of the outer cover 11 while ensuring the effective deflection action of the slewing crank arm 21.

[0059] This utility model also provides a center-mounted lawnmower 1, which includes the tension wheel adjustment device in the aforementioned embodiment, which can improve the adjustment operation of the tension of the transmission belt 13 and ensure the safety of the center-mounted lawnmower 1 to the greatest extent.

[0060] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tension wheel adjustment device for adjusting the position of the tension wheel inside a lawnmower, characterized in that, The tension wheel adjusting device includes a linkage component, which includes a curved rotary arm, and the tension wheel is installed at one end of the rotary arm. The lawnmower has a central axis of rotation inside its body, and the rotary arm is connected and installed on the central axis of rotation so that the rotary arm can bend and deflect with the central axis of rotation as the reference axis. The other end of the slewing crank arm is connected to an adjustment component, which includes an anchoring plate and a tension spring connected between the slewing crank arm and the anchoring plate. The installation position of the tension spring relative to the anchoring plate is adjustable. The tensioning wheel, the slewing arm, and the transmission mechanism of the lawnmower are located inside the outer casing of the machine body.

2. The tension wheel adjusting device according to claim 1, characterized in that, The slewing crank arm includes a short section end and a long section end, the tensioning wheel is connected to the short section end, and the adjusting component is connected to the long section end.

3. The tension wheel adjusting device according to claim 2, characterized in that, The slewing center shaft is connected to the bend of the slewing crank arm.

4. The tension wheel adjusting device according to claim 2, characterized in that, The short section is connected to a mounting shaft, the tension wheel is connected to the mounting shaft, the long section is provided with a connecting piece, and the end of the tension spring is hooked onto the connecting piece.

5. The tension wheel adjusting device according to claim 4, characterized in that, The anchoring bend is fixedly connected to the machine body, and the other end of the tension spring is connected to the anchoring bend via an adjusting bolt.

6. The tension wheel adjusting device according to claim 5, characterized in that, An adjusting nut is connected to the adjusting bolt, and a through hole is provided on the anchoring bend plate for the adjusting bolt to pass through. The adjusting nut is located on both sides of the through hole.

7. The tension wheel adjusting device according to claim 5, characterized in that, The tension spring includes a tension spring structure, and the end of the tension spring is attached to the end of the adjusting bolt.

8. The tension wheel adjusting device according to claim 4, characterized in that, The outer cover is provided with an opening, and the long section end extends out of the opening, the opening having at least a length of space.

9. The tension wheel adjusting device according to claim 4, characterized in that, The slewing arm includes a bent flat plate structure and is horizontally positioned below the drive belt.

10. A centrally mounted lawnmower, characterized in that, The tension wheel adjusting device includes any one of claims 1-9.

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