Tensioning structure, transmission assembly and lawn mower

Abstract

The utility model belongs to the technical field of lawn mowers, and provides a tensioning structure, a transmission assembly with the tensioning structure, and a lawn mower with the transmission assembly. The tensioning structure includes a cantilever, the first end of the cantilever is hinged to a frame, the second end is freely extended, the second end of the cantilever is rotatably provided with a tensioning wheel, the cantilever is connected to an elastic member, and also includes a guide unit, the guide unit is arranged on the frame, and the guide unit is used to guide the movement of the tensioning wheel so that the tensioning wheel will not swing at will. The tensioning structure, transmission assembly, and lawn mower provided by the utility model have simple structure, reasonable design, and high transmission stability.

Description

Technical Field

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

[0002] The tensioning structure is used to keep the transmission belt, transmission chain, etc. in a tensioned state at all times. At present, the tensioning structure in the prior art includes a cantilever, the first end of which is hinged to the frame and the second end is freely extended, and a tensioning wheel is arranged at the second end of the cantilever, and the cantilever is connected to an elastic member (for example, a torsion spring, a tension spring or a compression spring), and the elastic member is used to keep the tensioning wheel in contact with the transmission belt and transmission chain at all times. During use, the tensioning wheel of this tensioning structure can swing at will, thereby affecting the stability of the transmission. Utility Model Content

[0003] In view of the defects in the prior art, the purpose of the utility model is to provide a tensioning structure, a transmission assembly and a lawn mower to solve or alleviate the above-mentioned technical problems existing in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a tensioning structure, including a cantilever, a first end of the cantilever is hinged to a frame, and a second end extends freely, and a tensioning wheel is rotatably arranged at the second end of the cantilever, and the cantilever is connected to an elastic member, and also includes a guide unit, which is arranged on the frame, and the guide unit is used to guide the movement of the tensioning wheel so that the tensioning wheel will not swing at will.

[0005] Furthermore, the guide unit includes a guide rail, which is fixed on the frame, and a sliding seat is slidably arranged on the guide rail. The sliding seat can only move along the length direction of the guide rail, the tensioning wheel is rotatably arranged on the sliding seat, and the second end of the cantilever is transmission-connected to the sliding seat.

[0006] Furthermore, a guide hole is provided on the guide rail, and the guide hole is a strip-shaped hole. A sliding component matched with the guide hole is provided on one side of the sliding seat, and the sliding component is slidably inserted in the strip-shaped hole.

[0007] Furthermore, a first limit block is provided on one side of the guide rail away from the sliding seat, the first limit block is fixedly connected to the sliding component, and the first limit block and the sliding seat both contact the guide rail to clamp the guide rail between the first limit block and the sliding seat.

[0008] Furthermore, the sliding component is at least two sliding parts with circular cross-sections.

[0009] Furthermore, a transmission hole is provided at the second end of the cantilever, and the transmission hole is a strip-shaped hole. A transmission component is provided on the sliding seat, and the transmission component is cylindrical. The transmission component is slidably inserted in the transmission hole.

[0010] Furthermore, a second limit block is provided at one end of the transmission part away from the sliding seat, and the second limit block and the sliding seat both contact with the cantilever to clamp the cantilever between the second limit block and the sliding seat.

[0011] Furthermore, a limit rod is provided on one side of the tensioning wheel, the limit rod is fixedly connected to the sliding seat, and the limit rod is used to prevent the transmission belt or transmission chain from slipping out of the groove of the tensioning wheel.

[0012] In a second aspect, the utility model provides a transmission assembly, including a transmission belt structure, wherein the transmission belt structure includes at least two pulleys and a transmission belt mounted on at least two of the pulleys and capable of rotating with the rotation of the pulleys, and also includes any of the tensioning structures described above.

[0013] In a third aspect, the utility model provides a lawn mower, comprising the above-mentioned transmission assembly.

[0014] Beneficial effects of the utility model:

[0015] The tensioning structure, transmission assembly and lawn mower provided by the utility model are provided with a guide unit, under the action of which the tensioning wheel can only move along a preset direction, thereby achieving the purpose of improving the transmission stability of the transmission assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 A three-dimensional view of a transmission assembly provided in one embodiment of the utility model;

[0018] Figure 2 for Figure 1 An enlarged view of section A is shown;

[0019] Figure 3 for Figure 1 A partial view in the BB direction is shown.

[0020] Reference numerals:

[0021] 110, cantilever; 111, transmission hole; 120, tensioning wheel; 130, elastic member; 210, guide rail; 211, guide hole; 220, sliding seat; 230, sliding component; 240, first limit block; 250, second limit block; 260, transmission component; 270, limit rod; 310, pulley; 320, transmission belt. DETAILED DESCRIPTION

[0022] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0023] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] like Figure 1-3 As shown, the utility model provides a tensioning structure, including a cantilever 110, a first end of the cantilever 110 is hinged to a frame, and a second end is freely extended, a tensioning wheel 120 is rotatably provided at the second end of the cantilever 110, and the cantilever 110 is connected to an elastic member 130, and the elastic member 130 is used to ensure that the tensioning wheel 120 always maintains contact with the transmission belt 320 or the transmission chain.

[0029] In this embodiment, the tensioning structure also includes a guide unit, which is arranged on the frame. The guide unit is used to guide the movement of the tensioning wheel 120 so that the tensioning wheel 120 will only move along a preset direction and will not swing at will, thereby achieving the purpose of improving the transmission stability of the transmission belt 320 or the transmission chain.

[0030] Specifically, in one embodiment, the guide unit includes a guide rail 210, which is fixedly mounted on a frame, and a sliding seat 220 is slidably arranged on the guide rail 210, and the sliding seat 220 can only move along the length direction of the guide rail 210, so that the tensioning wheel 120 can only slide along the length direction of the guide rail 210. The tensioning wheel 120 is rotatably arranged on the sliding seat 220, and the second end of the cantilever 110 is transmission-connected with the sliding seat 220. When in use, under the action of the guide rail 210, the sliding seat 220 can only slide along the length direction of the guide rail 210, so that the tensioning wheel 120 arranged on the sliding seat 220 will not swing at will, thereby achieving the purpose of improving the transmission stability of the transmission belt 320 or the transmission chain.

[0031] Specifically, a guide hole 211 is provided on the guide rail 210, and the guide hole 211 is a strip-shaped hole. A sliding component 230 adapted to the guide hole 211 is provided on one side of the sliding seat 220, and the sliding component 230 is slidably inserted in the strip-shaped hole. When in use, the tensioning wheel 120 moves, thereby moving the sliding seat 220, and the sliding seat 220 moves with the sliding component 230. Since the sliding component 230 can only slide along the length direction of the guide hole 211, the sliding seat 220 can only slide along the length direction of the guide hole 211, and thus the tensioning wheel 120 can only slide along the length direction of the guide hole 211. Therefore, in this embodiment, the preset direction is the length direction of the guide hole 211. Specifically, the sliding component 230 is at least two sliding parts with circular cross sections.

[0032] Specifically, a first limit block 240 is provided on one side of the guide rail 210 away from the sliding seat 220 , the first limit block 240 is fixedly connected to the sliding component 230 , and the first limit block 240 and the sliding seat 220 both contact the guide rail 210 to clamp the guide rail 210 between the first limit block 240 and the sliding seat 220 .

[0033] Specifically, in one embodiment, the second end of the cantilever 110 is provided with a transmission hole 111, and the transmission hole 111 is a bar-shaped hole. The sliding seat 220 is provided with a transmission component 260, and the transmission component 260 is cylindrical. The transmission component 260 is slidably inserted in the transmission hole 111. When in use, the cantilever 110 swings to drive the transmission component 260 to move, and then drives the sliding seat 220 to move through the transmission component 260. Specifically, the end of the transmission part 260 away from the sliding seat 220 is provided with a second limit block 250, and the second limit block 250 and the sliding seat 220 both contact the cantilever 110 to clamp the cantilever 110 between the second limit block 250 and the sliding seat 220.

[0034] In one embodiment, a limit rod 270 is disposed on one side of the tension wheel 120 . The limit rod 270 is fixedly connected to the sliding seat 220 . The limit rod 270 is used to prevent the transmission belt 320 or the transmission chain from slipping out of the groove of the tension wheel 120 .

[0035] In a second aspect, the utility model provides a transmission assembly, including a transmission belt structure, the transmission belt structure including at least two pulleys 310 and a transmission belt 320 mounted on the at least two pulleys 310 and rotatable with the rotation of the pulleys 310, and also including the tensioning structure described in any of the above embodiments.

[0036] In a third aspect, the utility model provides a lawn mower, comprising the above-mentioned transmission assembly.

[0037] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A tensioning structure, comprising a cantilever (110), wherein a first end of the cantilever (110) is hinged to a frame and a second end thereof is freely extended, a tensioning wheel (120) is rotatably provided at the second end of the cantilever (110), and the cantilever (110) is connected to an elastic member (130), characterized in that: It also comprises a guide unit, which is arranged on the frame and is used to guide the movement of the tensioning wheel (120) so that the tensioning wheel (120) does not swing at will.

2. The tensioning structure according to claim 1, characterized in that: The guide unit comprises a guide rail (210), the guide rail (210) being fixedly arranged on the frame, a sliding seat (220) being slidably arranged on the guide rail (210), the sliding seat (220) being able to move only along the length direction of the guide rail (210), the tensioning wheel (120) being rotatably arranged on the sliding seat (220), and the second end of the cantilever (110) being drivingly connected to the sliding seat (220).

3. The tensioning structure according to claim 2, characterized in that: The guide rail (210) is provided with a guide hole (211), the guide hole (211) being a strip-shaped hole, and a sliding component (230) adapted to the guide hole (211) is provided on one side of the sliding seat (220), the sliding component (230) being slidably inserted in the strip-shaped hole.

4. The tensioning structure according to claim 3, characterized in that: A first limit block (240) is provided on a side of the guide rail (210) away from the sliding seat (220); the first limit block (240) is fixedly connected to the sliding component (230); and the first limit block (240) and the sliding seat (220) both contact the guide rail (210) so as to clamp the guide rail (210) between the first limit block (240) and the sliding seat (220).

5. The tensioning structure according to claim 3 or 4, characterized in that: The sliding component (230) is at least two sliding parts with circular cross-sections.

6. The tensioning structure according to any one of claims 2 to 4, characterized in that: The second end of the cantilever (110) is provided with a transmission hole (111), the transmission hole (111) is a bar-shaped hole, and the sliding seat (220) is provided with a transmission component (260), the transmission component (260) is cylindrical, and the transmission component (260) is slidably inserted in the transmission hole (111).

7. The tensioning structure according to claim 6, characterized in that: A second limit block (250) is provided at one end of the transmission part away from the sliding seat (220), and the second limit block (250) and the sliding seat (220) both contact the cantilever (110) so as to clamp the cantilever (110) between the second limit block (250) and the sliding seat (220).

8. The tensioning structure according to claim 2, 3, 4 or 7, characterized in that: A limiting rod (270) is provided on one side of the tension wheel (120), the limiting rod (270) being fixedly connected to the sliding seat (220), and the limiting rod (270) is used to prevent the transmission belt (320) or the transmission chain from sliding out of the groove of the tension wheel (120).

9. A transmission assembly, comprising a transmission belt structure, the transmission belt structure comprising at least two pulleys (310) and a transmission belt (320) sleeved on the at least two pulleys (310) and capable of rotating with the rotation of the pulleys (310), characterized in that: It also includes the tensioning structure according to any one of claims 1-8.

10. A lawn mower, characterized in that: Includes the transmission assembly as described in claim 9.

Images