Movable wheel disc driving mechanism, speed change assembly and lawn mower

Abstract

The utility model belongs to the technical field of transmissions, and provides a movable wheel disc driving mechanism, a speed change assembly with the movable wheel disc driving mechanism and a lawn mower with the speed change assembly, and the movable wheel disc driving mechanism is used for driving a movable wheel disc to move so as to change the distance between the movable wheel disc and a fixed wheel disc and comprises a driving disc and a driven disc, the sliding block is in sliding connection with the rack and can do reciprocating rectilinear motion between a first position and a second position in the Z-axis direction; the driving structure is used for driving the driving disc to do reciprocating rectilinear motion between a first position and a second position; wherein the movable wheel disc is rotationally connected with the driving disc and can move along with the driving disc, and the axis of the movable wheel disc is parallel to the Z-axis direction. The movable wheel disc driving mechanism, the speed change assembly and the lawn mower are simple in structure and reasonable in design, and the service life of the transmission belt is long.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a movable wheel disc driving mechanism, a speed change component and a lawn mower. Background Art

[0002] In the prior art, the utility model patent with the authorization announcement number CN219866110U provides a transmission mechanism and a lawn mower, wherein the transmission mechanism includes a speed change unit, and the speed change unit includes a driving pulley, a driven pulley, a transmission belt and an adjustment module. Among them, the driven pulley and / or the driving pulley include a wheel body A and a wheel body B. The adjustment module includes a tensioning wheel and a driving assembly. In the process of speed regulation, it is necessary to drive the tensioning wheel to move through the driving assembly to achieve the purpose of changing the tension of the transmission belt, so that the transmission belt forces the wheel body A or the wheel body B to move, thereby achieving the purpose of changing the transmission ratio between the driving pulley and the transmission pulley, and then achieving the purpose of speed regulation.

[0003] The disadvantage of the speed change unit of the above transmission mechanism is that the tension of the transmission belt is changed by the tensioning wheel, thereby forcing the wheel body A or the wheel body B to move through the transmission belt, which increases the burden on the transmission belt and shortens the service life of the transmission belt. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a movable wheel drive mechanism, a speed change assembly and a lawn mower to solve or alleviate the above-mentioned technical problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a movable wheel disc driving mechanism, which is used to drive the movable wheel disc to move so as to change the distance between the movable wheel disc and the fixed wheel disc, and is characterized in that it includes:

[0006] A driving plate, which is slidably connected to the frame and can perform reciprocating linear motion between a first position and a second position along the Z-axis direction; and

[0007] A driving structure, used for driving the driving disk to perform reciprocating linear motion between the first position and the second position;

[0008] The movable wheel is rotatably connected to the driving wheel and can move along with the driving wheel, and the axis of the movable wheel is parallel to the Z-axis direction.

[0009] Furthermore, the driving structure comprises:

[0010] A driving slider, which is slidably connected to the frame, can perform reciprocating linear motion between a third position and a fourth position along the X-axis direction, and is drivingly connected to the driving disk; and

[0011] A driving unit, used for driving the driving slider to perform reciprocating linear motion between the third position and the fourth position;

[0012] When the driving slider performs reciprocating linear motion between the third position and the fourth position, the driving slider drives the driving disk to perform reciprocating linear motion between the first position and the second position.

[0013] Furthermore, the driving slide block is provided with a driving slot, the driving disc is provided with a driving part adapted to the driving slot, and the driving part is slidably inserted in the driving slot;

[0014] When the driving slider performs reciprocating linear motion between the third position and the fourth position, the driving slider drives the driving disk to perform reciprocating linear motion between the first position and the second position through the driving slide groove and the driving part.

[0015] Furthermore, the driving slide groove is a strip groove, and the angle between the driving slide groove and the XOY plane is an obtuse angle or an acute angle.

[0016] Furthermore, the driving unit comprises:

[0017] A pedal, a first end of which is hinged to the frame and a second end of which is freely extending, and the pedal;

[0018] A swing arm, a first end of which is fixedly connected to the power output shaft of the pedal and a second end of which is freely extending;

[0019] a driving arm, a first end of which is hinged to the second end of the swing arm, and a second end of which is hinged to the driving slider; and

[0020] A first elastic member has a first end connected to the driving slider, the swing arm, the driving arm, the pedal or the driving disc, and a second end connected to the frame.

[0021] Furthermore, two driving sliders are provided, and the two driving sliders are respectively provided on both sides of the driving disk.

[0022] In a second aspect, the utility model provides a speed change assembly, comprising any one of the movable wheel drive mechanisms described above.

[0023] In a third aspect, the utility model provides a lawn mower, comprising the above-mentioned speed change assembly.

[0024] Beneficial effects of the utility model:

[0025] The movable wheel disc driving mechanism, the speed change assembly and the lawn mower provided by the utility model achieve the purpose of driving the movable wheel disc to move by arranging a driving disc and a driving structure for driving the driving disc to move, thereby achieving the purpose of changing the distance between the fixed wheel disc and the movable wheel disc, reducing the burden of the transmission belt and extending the service life of the transmission belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 A three-dimensional view of a speed change assembly provided by an embodiment of the utility model;

[0028] Figure 2 for Figure 1 An enlarged view of section A is shown;

[0029] Figure 3 for Figure 1 Another perspective view of the shift assembly shown;

[0030] Figure 4 for Figure 3 An enlarged view of section B is shown.

[0031] Reference numerals:

[0032] 110, driving pulley; 120, driven pulley; 101, movable wheel disc; 102, fixed wheel disc; 130, transmission belt; 210, driving disc; 211, driving part; 212, guide hole; 220, driving slider; 221, driving slide groove; 222, slide hole; 230, pedal; 240, swing arm; 250, driving arm; 260, first elastic member; 270, power output shaft; 300, frame; 310, guide rod; 320, limit block. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 limited.

[0037] 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.

[0038] 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.

[0039] like Figure 1-4 As shown, the utility model provides a driving mechanism for a movable wheel disc 101, which is used to drive the movable wheel disc 101 to move so as to change the distance between the movable wheel disc 101 and the fixed wheel disc 102, and includes a driving disc 210 and a driving structure.

[0040] The driving disk 210 is slidably connected to the frame 300. Specifically, a guide hole 212 is provided on the driving disk 210, and a guide rod 310 is fixedly provided on the frame 300. The guide rod 310 is slidably inserted in the guide hole 212. Through the cooperation between the guide hole 212 and the guide rod 310, the movement of the driving disk 210 is limited and guided. The driving disk 210 can make reciprocating linear motion between the first position and the second position along the Z-axis direction. The driving structure is used to drive the driving disk 210 to make reciprocating linear motion between the first position and the second position. Among them, the movable wheel disk 101 is rotatably connected to the driving disk 210 and can move with the driving disk 210, and the axis of the movable wheel disk 101 is parallel to the Z-axis direction, that is, the axis (rotation center line) of the movable wheel disk 101 is in the Z-axis direction.

[0041] When in use, the driving structure drives the driving disc 210 to perform reciprocating linear motion between the first position and the second position, and the driving disc 210 moves with the movable wheel disc 101 to achieve the purpose of changing the distance between the movable wheel disc 101 and the fixed wheel disc 102 .

[0042] The driving mechanism of the movable wheel 101 provided by the utility model drives the driving disk 210 to perform reciprocating linear motion between the first position and the second position through the driving structure, thereby achieving the purpose of changing the distance between the movable wheel 101 and the fixed wheel 102. The operation is simple, and there is no need to force the movable wheel 101 to move through the transmission belt 130, which reduces the burden on the transmission belt 130 and increases the service life of the transmission belt 130.

[0043] In one embodiment, the driving structure includes a driving slider 220 and a driving unit.

[0044] The driving slider 220 is slidably connected to the frame 300. Specifically, a long strip-shaped sliding hole 222 is provided on the driving slider 220, and a limit block 320 adapted to the sliding hole 222 is provided on the frame 300. The driving slider 220 can reciprocate linearly between the third position and the fourth position along the X-axis direction. Specifically, in this embodiment, the X-axis direction is the length direction of the frame 300. The driving slider 220 is drivingly connected to the driving disk 210.

[0045] The driving unit is used to drive the driving slider 220 to perform reciprocating linear motion between the third position and the fourth position.

[0046] When the driving slider 220 performs a reciprocating linear motion between the third position and the fourth position, the driving slider 220 drives the driving disk 210 to perform a reciprocating linear motion between the first position and the second position.

[0047] When in use, the driving unit drives the driving slider 220 to perform reciprocating linear motion between the third position and the fourth position, thereby driving the driving disk 210 to perform reciprocating linear motion between the first position and the second position, thereby achieving the purpose of changing the distance between the movable wheel 101 and the fixed wheel 102.

[0048] The driving structure provided in this embodiment has a simple structure and a reasonable design.

[0049] Specifically, a driving slide 221 is provided on the driving slider 220, and a driving portion 211 adapted to the driving slide 221 is provided on the driving disk 210, and the driving portion 211 is slidably inserted in the driving slide 221. When the driving slider 220 performs reciprocating linear motion between the third position and the fourth position, the driving slider 220 drives the driving disk 210 to perform reciprocating linear motion between the first position and the second position through the driving slide 221 and the driving portion 211.

[0050] Specifically, the driving slide groove 221 is a strip-shaped groove, and the angle between the driving slide groove 221 and the XOY plane is an obtuse angle or an acute angle, that is, the driving slide groove 221 is inclined relative to the XOY plane.

[0051] When in use, the driving unit drives the driving slider 220 to perform reciprocating linear motion between the third position and the fourth position. During this process, under the action of the driving groove 221, the driving part 211 slides in the driving groove 221. Since the driving groove 221 is inclined, when the driving part 211 slides in the driving groove 221, the driving part 211 will move along the Z-axis direction with the driving groove 221, thereby achieving the purpose of driving the driving disk 210 to move along the Z-axis direction, and then achieving the purpose of driving the movable wheel 101 to move.

[0052] In one embodiment, the driving unit includes a pedal 230 , a swing arm 240 , a driving arm 250 , and a first elastic member 260 .

[0053] The first end of the pedal 230 is hinged to the frame 300, and the second end is freely extended. The first end of the swing arm 240 is fixedly connected to the power output shaft 270 of the pedal 230, and the second end is freely extended. The first end of the driving arm 250 is hinged to the second end of the swing arm, and the second end is hinged to the driving slider 220. The first end of the first elastic member 260 is connected to the driving slider 220, the swing arm 240, the driving arm 250, the pedal 230 or the driving disk 210, and the second end is connected to the frame 300. Specifically, in this embodiment, the first elastic member 260 is a tension spring, and the first end of the first elastic member 260 is connected to the driving slider 220.

[0054] Specifically, by stepping on the pedal 230, the pedal 230 rotates, the power output shaft of the pedal 230 drives the swing arm 240 to swing, the swing arm 240 drives the driving arm 250 to move, and the driving arm 250 drives the driving slider 220 to move, and the driving slider 220 drives the driving disc 210 to move through the driving groove 221 and the driving part 211, thereby achieving the purpose of driving the movable wheel 101 to move, and at the same time, the first elastic member 260 accumulates force.

[0055] After the pedal 230 is released, under the action of the elastic force of the first elastic member 260, the first elastic member 260 drives the driving slider 220 to move in the opposite direction, and the driving slider 220 moves the driving arm 250 and the driving disk 210 in the opposite direction, and the driving disk 210 moves the movable wheel 101 in the opposite direction. At the same time, the driving arm 250 moves in the opposite direction with the swing arm 240, and the swing arm 240 rotates the power output shaft of the pedal 230 in the opposite direction, and the power output shaft of the pedal 230 rotates the pedal 230 in the opposite direction, thereby achieving the purpose of returning the pedal 230 to its original position.

[0056] In one embodiment, two driving sliders 220 are provided, and the two driving sliders 220 are respectively provided on both sides of the driving disk 210. Of course, the number of swing arms 240 and driving arms 250 is equal to and corresponds to the number of driving sliders 220. By providing two driving sliders 220, the purpose of improving the stability of driving the driving disk 210 to move is achieved.

[0057] In a second aspect, the utility model provides a speed change assembly, comprising any one of the above-mentioned movable wheel 101 driving mechanisms.

[0058] Specifically, in this embodiment, the speed change assembly further includes a driving pulley 110, a driven pulley 120 and a transmission belt 130. The driving pulley 110 and / or the driven pulley 120 include a movable wheel disc 101 and a fixed wheel disc 102. Of course, the cross section of the transmission belt 130 is trapezoidal, and the belt groove surrounded by the movable wheel disc 101 and the fixed wheel disc 102 is adapted to the transmission belt 130.

[0059] When in use, the active wheel 101 is driven to move by the driving mechanism, so that the transmission belt 130 moves toward or away from the axis of the driving pulley 110 or the driven pulley 120. Specifically, when the distance between the active wheel 101 and the fixed wheel 102 increases, the transmission belt 130 moves toward the axis of the driving pulley 110 or the driven pulley 120; when the distance between the active wheel 101 and the fixed wheel 102 becomes smaller, the transmission belt 130 moves away from the axis of the driving pulley 110 or the driven pulley 120, thereby achieving the purpose of changing the transmission ratio between the driving pulley 110 and the driven pulley 120, and then achieving the purpose of speed change.

[0060] Specifically, when only one of the driving pulley 110 and the driven pulley 120 includes a movable wheel 101 and a fixed wheel 102, the speed change assembly also includes a tensioning structure, so that the transmission belt 130 is always in a tensioned state regardless of whether the transmission radius of the transmission belt 130 increases or decreases with the movement of the movable wheel 101.

[0061] When both the driving pulley 110 and the driven pulley 120 include a movable pulley 101 and a fixed pulley 102, the transmission radius of one of the driving pulley 110 and the driven pulley 120 becomes larger and the transmission radius of the other one becomes smaller, thereby achieving the purpose of keeping the transmission belt 130 in a tensioned state at all times.

[0062] In a third aspect, the utility model provides a lawn mower, comprising the above-mentioned speed change assembly.

[0063] 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.

[0064] 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 movable wheel disc (101) driving mechanism, used for driving the movable wheel disc (101) to move so as to change the distance between the movable wheel disc (101) and a fixed wheel disc (102), characterized in that: include: A driving plate (210) is slidably connected to the frame (300) and can perform reciprocating linear motion between a first position and a second position along the Z-axis direction; as well as A driving structure, used for driving the driving disk (210) to perform reciprocating linear motion between the first position and the second position; The movable wheel disc (101) is rotatably connected to the driving disc (210) and can move along with the driving disc (210), and the axis of the movable wheel disc (101) is parallel to the Z-axis direction.

2. The movable wheel (101) driving mechanism according to claim 1, characterized in that: The driving structure comprises: A driving slider (220) is slidably connected to the frame (300), can perform reciprocating linear motion between a third position and a fourth position along the X-axis direction, and is drivingly connected to the driving disk (210); and A driving unit, used for driving the driving slider (220) to perform reciprocating linear motion between the third position and the fourth position; When the driving slider (220) performs reciprocating linear motion between the third position and the fourth position, the driving slider (220) drives the driving disk (210) to perform reciprocating linear motion between the first position and the second position.

3. The driving mechanism of the movable wheel (101) according to claim 2, characterized in that: The driving slider (220) is provided with a driving slot (221), the driving disc (210) is provided with a driving portion (211) adapted to the driving slot (221), and the driving portion (211) is slidably inserted in the driving slot (221); When the driving slider (220) performs reciprocating linear motion between the third position and the fourth position, the driving slider (220) drives the driving disk (210) to perform reciprocating linear motion between the first position and the second position via the driving slide groove (221) and the driving portion (211).

4. The driving mechanism of the movable wheel (101) according to claim 3, characterized in that: The driving slide groove (221) is a strip-shaped groove, and the angle between the driving slide groove (221) and the XOY plane is an obtuse angle or an acute angle.

5. The movable wheel (101) driving mechanism according to any one of claims 2 to 4, characterized in that: The driving unit comprises: A pedal (230), a first end of which is hinged to the frame (300) and a second end of which is freely extending, and the pedal (230); A swing arm (240), a first end of which is fixedly connected to a power output shaft (270) of the pedal (230) and a second end of which is freely extending; a driving arm (250), a first end of which is hinged to the second end of the swing arm (240), and a second end of which is hinged to the driving slider (220); and A first elastic member (260) has a first end connected to the driving slider (220), the swing arm (240), the driving arm (250), the pedal (230) or the driving disk (210), and a second end connected to the frame (300).

6. The driving mechanism of the movable wheel (101) according to claim 2, characterized in that: Two driving sliders (220) are provided, and the two driving sliders (220) are respectively provided on both sides of the driving disk (210).

7. A speed change assembly, characterized in that: It comprises the movable wheel (101) driving mechanism as described in any one of claims 1 to 6.

8. A lawn mower, characterized in that: Includes the speed change assembly as claimed in claim 7.

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