Reverse gear speed limiting mechanism and mower
By designing the cooperative structure of limited sales and slider in the inverted speed limit mechanism of the grass cutting machine, the problem of difficulty speed limit the speed of the mellasty machine is difficult to limit the speed, and the limitation of the inversion state of the grass cutting machine is realized. Speed, improve safety and stability.
Patent Information
- Application Number
- CN202421398126.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The existing lawn mowers lack speed limiting mechanisms when reversed, which poses safety risks.
Design an inverted speed limit mechanism, including racks, limits, sliders, throttle components, shift components and elastic components, and extend the limit sales into the limited -limited hole by the reverse gear state, limited the slider block block The sliding distance is limited to the deep step of the throttle component to achieve the speed limit of the inverted state of the grass cutting machine.
Effectively limited the maximum speed of the mortar machine in the reverse state, and improved the safety and stability during the use process.
Smart Images
Figure CN222415944U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lawn mowers, in particular to a reverse gear speed limiting mechanism and a lawn mower. Background Art
[0002] A lawn mower, also known as a weed cutter, lawn mower, lawn trimmer, etc., is a mechanical tool used to trim lawns, vegetation, etc. It is composed of a cutter disc, an engine, a running wheel, a blade, an armrest, a control, etc. By using a lawn mower to work, the weeding efficiency can be improved and the working time can be saved. The lawn mowers in the prior art do not have a mechanism to limit the maximum speed in the reverse gear state, so there are certain safety hazards in the reverse state. Utility Model Content
[0003] In view of the defects in the prior art, the purpose of the present invention is to provide a reverse gear speed limiting mechanism and a lawn mower, so as to achieve the purpose of limiting the reverse gear speed of the lawn mower and improve the safety and stability during use.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a reverse speed limiting mechanism, including a frame, which is provided with a mounting plate; a limit pin, which is movably engaged with the mounting plate; a first slider, which is slidably engaged with the mounting plate, and a first limit hole is provided on the first slider, and the first limit hole extends along the sliding direction of the first slider; a throttle assembly, which is used to drive the first slider to move; a second slider, which is slidably engaged with the mounting plate, and the sliding direction of the second slider is parallel to the sliding direction of the first slider, and a driving part is provided on the second slider, and the driving part can drive the limit pin to extend into the first limit hole; a shifting assembly, which is used to drive the second slider to move; and an elastic member, which is used to apply elastic force to the limit pin, so that the limit pin abuts against the driving part and makes the limit pin have a tendency to exit the first limit hole.
[0005] Preferably, the driving portion is provided with a first abutting surface and a second abutting surface connected to each other, the first abutting surface and the second abutting surface both extend along the sliding direction of the second sliding block, and the elastic member is used to make the limiting pin abut against the first abutting surface or the second abutting surface;
[0006] When the limit pin abuts against the first abutting surface, the limit pin is located outside the first limit hole; when the limit pin abuts against the second abutting surface, the limit pin extends into the first limit hole.
[0007] Preferably, the driving portion is provided with an inclined transition slope, the transition slope respectively connects the first abutting surface and the second abutting surface, and the limit pin can abut on the transition slope.
[0008] Preferably, a supporting protrusion is provided on the mounting plate, and the limit pin is movably inserted into the supporting protrusion; a limit head is provided at one end of the limit pin, and the limit head can respectively abut on the first abutting surface, the transition inclined surface and the second abutting surface; the elastic member is sleeved outside the limit pin, and the two ends of the elastic member respectively abut on the limit head and the supporting protrusion.
[0009] Preferably, a second limit hole is provided on the first slider, and the second limit hole extends along the sliding direction of the first slider; two first limit columns are provided on the mounting plate, and the first limit columns pass through the second limit hole and cooperate with the inner side wall of the second limit hole; it also includes a first limit block, the first slider is located between the mounting plate and the first limit block, and the first limit column is threaded with a first locking nut, and the first locking nut abuts against the first limit block.
[0010] Preferably, a third limit hole is provided on the second slider, and the third limit hole extends along the sliding direction of the second slider; two second limit columns are provided on the mounting plate, and the second limit columns pass through the third limit hole and cooperate with the inner side wall of the third limit hole; and a second limit block is also included, and the second slider is located between the mounting plate and the second limit block, and the second limit column is threaded with a second locking nut, and the second locking nut abuts against the second limit block.
[0011] Preferably, the first sliding block is arranged below the mounting plate, and the second sliding block is arranged above the mounting plate.
[0012] Preferably, the first sliding block is provided with a first connecting block, and the first connecting block is provided with a first connecting hole; the second sliding block is provided with a second connecting block, and the second connecting block is provided with a second connecting hole.
[0013] The utility model also provides a lawn mower, comprising the above-mentioned reverse gear speed limiting mechanism.
[0014] Beneficial effects of the utility model:
[0015] The utility model discloses a reverse gear speed limiting mechanism, which, when the reverse gear is engaged, causes a limit pin to extend into a first limit hole, so that the limit pin limits the sliding distance of the first slider. In this way, the operator cannot further step on the accelerator pedal of the accelerator assembly, so that the lawn mower cannot be further accelerated when in the reverse gear state, thereby achieving the purpose of limiting the reverse gear speed of the lawn mower and improving the safety and stability during use.
[0016] The utility model discloses a lawn mower which, by using the reverse gear speed limiting mechanism, can limit the maximum vehicle speed in the reverse gear state, thereby improving the safety and stability of the lawn mower during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] 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.
[0018] Figure 1 A schematic diagram of the structure of a reverse gear speed limiting mechanism provided in one embodiment of the utility model;
[0019] Figure 2 is a structural schematic diagram of the reverse gear speed limiting mechanism from another perspective;
[0020] Figure 3 It is a schematic diagram of the structure of the cooperation between the driving part and the limit pin;
[0021] Figure 4 It is a structural schematic diagram of the bottom of the mounting plate;
[0022] Figure 5 It is a cross-sectional schematic diagram of the cooperation between the driving part, the limiting pin and the first limiting block;
[0023] Figure 6 It is a structural schematic diagram of the first sliding block being matched with the bottom of the mounting plate;
[0024] Figure 7 is a schematic structural diagram of a first sliding block;
[0025] Figure 8 It is a structural schematic diagram of the second sliding block being matched with the top of the mounting plate;
[0026] Fig. 9 is a schematic structural diagram of a second slider;
[0027] Reference numerals:
[0028] 10. Frame; 11. Mounting plate; 12. Support protrusion; 13. First limiting column; 14. First locking nut; 15. Second limiting column; 16. Second locking nut; 20. Limit pin; 21. Limit head; 30. First slider; 31. First limiting hole; 32. Second limiting hole; 33. First connecting block; 40. Throttle assembly; 50. Second slider; 51. Drive unit; 511. First abutting surface; 512. Second abutting surface; 513. Transition slope; 52. Third limiting hole; 53. Second connecting block; 60. Shift assembly; 70. Elastic member; 80. First limiting block; 90. Second limiting block. DETAILED DESCRIPTION
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] Embodiment 1
[0036] like Figure 1-9 As shown, in one embodiment of the utility model, a reverse gear speed limiting mechanism is provided, comprising a frame 10, a limit pin 20, a first slider 30, a throttle assembly 40, a second slider 50, a shift assembly 60 and an elastic member 70. A mounting plate 11 is fixedly mounted on the frame 10, and the limit pin 20 is vertically movably inserted on the mounting plate 11. The first slider 30 is slidably fitted on the mounting plate 11, and a first limit hole 31 is provided on the first slider 30, and the first limit hole 31 extends along the sliding direction of the first slider 30, and the throttle assembly 40 is used to drive the first slider 30 to move.
[0037] The second slider 50 is slidably fitted on the mounting plate 11, and the sliding direction of the second slider 50 is parallel to the sliding direction of the first slider 30. The second slider 50 is provided with a driving part 51, and the driving part 51 can drive the limit pin 20 to extend into the first limit hole 31. The shift assembly 60 is used to drive the second slider 50 to move. The elastic member 70 is used to apply elastic force to the limit pin 20 so that the limit pin 20 has a tendency to withdraw from the first limit hole 31.
[0038] When the operator operates the shift assembly 60 to shift into reverse gear, the shift assembly 60 drives the second slider 50 to move and the driving unit 51 to move synchronously. During the movement of the driving unit 51, the limiting pin 20 is pressed, so that the limiting pin 20 extends into the first limiting hole 31. When the operator steps on the accelerator pedal of the accelerator assembly 40 to reverse and accelerate the lawn mower, the accelerator assembly 40 drives the first slider 30 to slide. Since the limiting pin 20 is in the first limiting hole 31, the sliding distance of the first slider 30 is limited, and the operator cannot further step on the accelerator pedal, thereby achieving the purpose of limiting the speed of the lawn mower in reverse gear.
[0039] When the operator operates the shift assembly 60 to exit the reverse gear, the elastic force of the elastic member 70 causes the limit pin 20 to exit the first limit hole 31 , so that the operator can use the accelerator pedal normally.
[0040] The present embodiment discloses a reverse speed limiting mechanism, which, when the reverse gear is engaged, causes the limit pin 20 to extend into the first limit hole 31, so that the limit pin 20 limits the sliding distance of the first slider 30. In this way, the operator cannot further step on the accelerator pedal of the accelerator assembly 40, so that the lawn mower cannot be further accelerated in the reverse gear state, thereby achieving the purpose of limiting the reverse speed of the lawn mower and improving the safety and stability during use.
[0041] In one embodiment, the driving portion 51 is provided with a first abutting surface 511 and a second abutting surface 512 connected to each other, and both the first abutting surface 511 and the second abutting surface 512 extend along the sliding direction of the second slider 50 , and the elastic member 70 is used to make the limit pin 20 abut against the first abutting surface 511 or the second abutting surface 512 .
[0042] When the limit pin 20 abuts against the first abutting surface 511, the limit pin 20 is located outside the first limit hole 31. When the operator operates the shift assembly 60 to shift into reverse gear, the shift assembly 60 drives the second slider 50 to move and the driving part 51 to move synchronously. When the limit pin 20 abuts against the second abutting surface 512, the limit pin 20 extends into the first limit hole 31. In this way, the sliding distance of the first slider 30 is limited.
[0043] In one embodiment, the driving part 51 is provided with an inclined transition slope 513, which connects the first abutting surface 511 and the second abutting surface 512 respectively, and the limit pin 20 can abut on the transition slope 513. In the process of extending the limit pin 20 into the first limit hole 31, after the limit pin 20 contacts the transition slope 513, the driving part 51 will gradually press down the limit pin 20 during the movement, so that the limit pin 20 gradually extends into the first limit hole 31. When the limit pin 20 abuts on the second abutting surface 512, the maximum extension distance of the limit pin 20 will be limited. By designing the transition slope 513 to connect the first abutting surface 511 and the second abutting surface 512, the smoothness in the process of pushing the limit pin 20 is improved.
[0044] In one embodiment, in order to achieve smooth movement on the mounting plate 11, a support protrusion 12 is provided on the mounting plate 11, and the limit pin 20 is movably inserted into the support protrusion 12. A limit head 21 is provided at one end of the limit pin 20, and the limit head 21 can respectively abut on the first abutting surface 511, the transition slope 513 and the second abutting surface 512. The elastic member 70 is a spring, and the elastic member 70 is sleeved outside the limit pin 20, and the two ends of the elastic member 70 respectively abut the limit head 21 and the support protrusion 12.
[0045] In one embodiment, the first slider 30 is provided with a second limiting hole 32, and the second limiting hole 32 extends along the sliding direction of the first slider 30. The mounting plate 11 is provided with two first limiting posts 13, and the first limiting posts 13 pass through the second limiting holes 32 and cooperate with the inner sidewalls of the second limiting holes 32. The reverse gear speed limiting mechanism also includes a first limiting block 80, and the first slider 30 is located between the mounting plate 11 and the first limiting block 80. The first limiting post 13 is threadedly matched with a first locking nut 14, and the first locking nut 14 abuts against the first limiting block 80.
[0046] With the cooperation among the second limiting hole 32, the first limiting column 13, the first limiting block 80 and the first locking nut 14, the first slider 30 can only move along the length direction of the frame 10 under the drive of the throttle assembly 40, thereby improving the accuracy of the alignment between the first limiting hole 31 and the limiting pin 20.
[0047] In one embodiment, the second slider 50 is provided with a third limiting hole 52, and the third limiting hole 52 extends along the sliding direction of the second slider 50. Two second limiting columns 15 are provided on the mounting plate 11, and the second limiting columns 15 pass through the third limiting hole 52 and cooperate with the inner side wall of the third limiting hole 52. The reverse speed limiting mechanism also includes a second limiting block 90, and the second slider 50 is located between the mounting plate 11 and the second limiting block 90. The second limiting column 15 is threadedly matched with a second locking nut 16, and the second locking nut 16 abuts against the second limiting block 90.
[0048] With the cooperation of the third limiting hole 52, the second limiting column 15, the second limiting block 90 and the second locking nut 16, the second slider 50 can only move along the length direction of the frame 10 under the drive of the shift assembly 60, thereby improving the accuracy of the alignment between the driving part 51 and the limiting pin 20.
[0049] In one embodiment, since the distance between the accelerator pedal and the mounting plate 11 is relatively far, the first slider 30 is disposed below the mounting plate 11. Since the distance between the shift pedal and the mounting plate 11 is relatively close, the second slider 50 is disposed above the mounting plate 11, so that the overall structure of the reverse gear speed limiting mechanism is more compact.
[0050] In one embodiment, in order to achieve connection with the throttle assembly 40 and the shift assembly 60, the first slider 30 is provided with a first connection block 33, and the first connection block 33 is provided with a first connection hole. The second slider 50 is provided with a second connection block 53, and the second connection block 53 is provided with a second connection hole.
[0051] Embodiment 2
[0052] In another embodiment of the utility model, a lawn mower is provided, comprising the reverse gear speed limiting mechanism in the above-mentioned embodiment 1. By using the above-mentioned reverse gear speed limiting mechanism, the maximum vehicle speed in the reverse gear state can be limited, thereby improving the safety and stability of the lawn mower during use.
[0053] 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.
[0054] 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 reverse gear speed limiting mechanism, characterized in that: include: A frame (10) provided with a mounting plate (11); A limit pin (20) movably engaged on the mounting plate (11); A first sliding block (30) is slidably engaged with the mounting plate (11), the first sliding block (30) being provided with a first limiting hole (31), the first limiting hole (31) extending along the sliding direction of the first sliding block (30); A throttle assembly (40), used for driving the first sliding block (30) to move; A second slider (50) is slidably engaged with the mounting plate (11); the sliding direction of the second slider (50) is parallel to the sliding direction of the first slider (30); a driving part (51) is provided on the second slider (50); the driving part (51) can drive the limiting pin (20) to extend into the first limiting hole (31); A shift assembly (60) for driving the second slider (50) to move; and The elastic member (70) is used to apply elastic force to the limiting pin (20) so that the limiting pin (20) abuts against the driving part (51) and the limiting pin (20) has a tendency to withdraw from the first limiting hole (31).
2. The reverse speed limiting mechanism according to claim 1, characterized in that: The driving portion (51) is provided with a first abutting surface (511) and a second abutting surface (512) connected to each other, the first abutting surface (511) and the second abutting surface (512) both extend along the sliding direction of the second sliding block (50), and the elastic member (70) is used to make the limiting pin (20) abut against the first abutting surface (511) or the second abutting surface (512); When the limit pin (20) abuts against the first abutting surface (511), the limit pin (20) is located outside the first limit hole (31); when the limit pin (20) abuts against the second abutting surface (512), the limit pin (20) extends into the first limit hole (31).
3. The reverse speed limiting mechanism according to claim 2, characterized in that: The driving portion (51) is provided with an inclined transition slope (513), the transition slope (513) respectively connecting the first abutting surface (511) and the second abutting surface (512), and the limiting pin (20) can abut against the transition slope (513).
4. The reverse speed limiting mechanism according to claim 3, characterized in that: The mounting plate (11) is provided with a supporting protrusion (12), and the limiting pin (20) is movably inserted into the supporting protrusion (12); A limiting head (21) is provided at one end of the limiting pin (20), and the limiting head (21) can respectively abut against the first abutting surface (511), the transition inclined surface (513) and the second abutting surface (512); the elastic member (70) is sleeved outside the limiting pin (20), and the two ends of the elastic member (70) respectively abut against the limiting head (21) and the supporting protrusion (12).
5. The reverse gear speed limiting mechanism according to claim 1, characterized in that: The first sliding block (30) is provided with a second limiting hole (32), and the second limiting hole (32) extends along the sliding direction of the first sliding block (30); The mounting plate (11) is provided with two first limiting columns (13), the first limiting columns (13) pass through the second limiting holes (32) and cooperate with the inner side walls of the second limiting holes (32); and also includes a first limiting block (80), the first sliding block (30) is located between the mounting plate (11) and the first limiting block (80), the first limiting column (13) is threadedly engaged with a first locking nut (14), and the first locking nut (14) abuts against the first limiting block (80).
6. The reverse gear speed limiting mechanism according to claim 1, characterized in that: The second sliding block (50) is provided with a third limiting hole (52), and the third limiting hole (52) extends along the sliding direction of the second sliding block (50); The mounting plate (11) is provided with two second limiting columns (15), the second limiting columns (15) pass through the third limiting hole (52) and cooperate with the inner wall of the third limiting hole (52); it also includes a second limiting block (90), the second sliding block (50) is located between the mounting plate (11) and the second limiting block (90), the second limiting column (15) is threadedly engaged with a second locking nut (16), and the second locking nut (16) abuts against the second limiting block (90).
7. The reverse speed limiting mechanism according to claim 1, characterized in that: The first sliding block (30) is arranged below the mounting plate (11), and the second sliding block (50) is arranged above the mounting plate (11).
8. The reverse gear speed limiting mechanism according to claim 1, characterized in that: The first sliding block (30) is provided with a first connecting block (33), and the first connecting block (33) is provided with a first connecting hole; the second sliding block (50) is provided with a second connecting block (53), and the second connecting block (53) is provided with a second connecting hole.
9. A lawn mower, characterized in that: The invention comprises the reverse speed limiting mechanism according to any one of claims 1 to 8.