Lifting mechanism and mower with same

Abstract

The application relates to a lifting mechanism and a mower with the same, and belongs to the technical field of harvesting machines. The lifting mechanism comprises a fixed shell, a lifting shell arranged in the fixed shell, a driving piece arranged in the lifting shell, and a lifting assembly connected with one end of the output shaft of the driving piece and used for driving the lifting shell to slide relative to the fixed shell. The lifting assembly comprises a first one-way driving ring in transmission connection with the driving piece. When the driving piece rotates forward, the driving piece and the first one-way driving ring are in a slipping state. When the driving piece reverses, the driving piece is in transmission connection with the first one-way driving ring, and the driving piece drives the lifting assembly. The application has the effect of conveniently adjusting the height of the mower blade.

Description

Technical Field

[0001] This application relates to the field of harvesting machinery technology, and in particular to a lifting mechanism and a lawnmower equipped with the mechanism. Background Technology

[0002] A lawnmower is a mechanical tool used to trim lawns, vegetation, etc. A lawnmower generally consists of a housing, blades, an engine, a moving mechanism, and other parts. Its working principle is as follows: blades are mounted on the engine's output shaft; the blades are driven by the engine to rotate at high speed, thus trimming the lawn.

[0003] During the application of weeding machines, the height of the cutting blades needs to be adjusted due to various weeding requirements or terrain issues. Currently, most blade height adjustment mechanisms use manual height adjustment devices to adjust the cutting height, or use motors to achieve automatic height adjustment. However, existing electric height adjustment devices have complex structures and high costs. Summary of the Invention

[0004] To improve the ease of height adjustment of a lawnmower, this application provides a lifting mechanism and a lawnmower with the mechanism.

[0005] The lifting mechanism and lawnmower equipped with the mechanism provided in this application adopt the following technical solution:

[0006] A lifting mechanism includes a fixed housing, a lifting housing disposed within the fixed housing, a driving member disposed within the lifting housing, a cutting member connected to an output shaft at one end of the driving member, and a lifting assembly connected to the output shaft at the other end of the driving member and used to drive the lifting housing to slide relative to the fixed housing. The lifting assembly includes a first one-way driving ring that is drively connected to the driving member.

[0007] When the drive component rotates forward, it slips with the first one-way drive ring. When the drive component rotates in reverse, it is connected to the first one-way drive ring and drives the lifting assembly.

[0008] By adopting the above technical solution, when using the lawnmower, the drive unit is fixedly installed on the lifting housing, and both ends of the drive unit are respectively connected to the cutting blades for mowing and the lifting assembly. Height adjustment is achieved by rotating the drive unit in both directions. When the drive unit rotates forward, the first one-way drive ring functions normally as a rotary bearing, with the inner and outer rings of the first one-way drive ring sliding relative to each other, and the drive unit and lifting assembly are disengaged. When the drive unit rotates in reverse, the first one-way drive ring is locked, and the output shaft of the drive unit drives the entire lifting assembly through the first one-way drive ring. The lifting assembly then allows the lifting housing to slide relative to the fixed housing, thereby achieving height adjustment of the cutting blades. Both the lifting assembly and the cutting blades are driven by the drive unit, making the adjustment method simple and convenient.

[0009] Optionally, the lifting assembly includes a bearing cover for mounting the first one-way drive ring, an adjusting worm gear connected to the bearing cover, an adjusting worm wheel connected to the adjusting worm gear, and a swing arm connected to the adjusting worm wheel. The swing arm has a sliding rod that is intersected with the axis of the adjusting worm wheel, and the fixed housing has a strip-shaped adjusting hole for limiting the sliding rod.

[0010] By adopting the above technical solution, the structural composition of the lifting assembly is disclosed. The first one-way drive ring is fixedly installed on the bearing cover. When the drive component reverses, the first one-way drive ring is in a locked state. The drive component drives the bearing cover to rotate through the first one-way drive ring, so that the adjusting worm rotates. The adjusting worm drives the adjusting worm wheel to rotate. The swing arm on the adjusting worm wheel rotates along the axis of the adjusting worm wheel. The sliding rod and the adjusting worm wheel are eccentrically arranged. The sliding rod can only slide back and forth in the adjusting hole, thereby driving the entire lifting housing to slide relative to the fixed housing. The above-mentioned structure of worm wheel and worm is stable in transmission. The sliding of the lifting housing is achieved by the eccentric rotation of the sliding rod. The structure is compact and converts rotational force into horizontal force.

[0011] Optionally, the bearing cover has a bearing groove adapted to the outer ring of the first one-way drive ring, the bearing cover has a first locking groove on the inner wall of the bearing groove, the outer ring of the first one-way drive ring has a second locking groove corresponding to the first locking groove, and the bearing cover is provided with a first locking member for insertion into the first locking groove and the second locking groove.

[0012] By adopting the above technical solution, a locking method for the first one-way drive ring and the bearing cover is disclosed. After the first one-way drive ring is installed into the bearing groove, the first one-way drive ring or the bearing cover is rotated so that the first locking groove and the second locking groove correspond. Finally, the first locking member is inserted into the first locking groove and the second locking groove, thereby realizing the locking and fixing of the first one-way drive ring and the bearing cover. The locking strength is high and the locking method is simple and convenient.

[0013] Optionally, the adjusting worm gear is provided with a second one-way drive ring at the end away from the drive member. The locking direction of the second one-way drive ring is opposite to that of the first one-way drive ring. The lifting housing has a one-way bearing seat for mounting the second one-way drive ring.

[0014] By adopting the above technical solution, the second one-way drive ring is connected to the end of the adjusting worm gear away from the driving component. The outer ring of the second one-way drive ring is fixedly connected to the one-way bearing. When the driving component rotates forward, the adjusting worm gear is locked to the lifting housing through the second one-way drive ring. The second one-way drive ring can reduce the impact of the driving component's rotation on the adjusting worm gear and ensure the stability of the adjusting worm gear. When the driving component rotates in reverse, the adjusting worm gear and the lifting housing are disengaged. The second one-way drive ring provides support for the adjusting worm gear and reduces friction when the adjusting worm gear rotates.

[0015] Optionally, the side wall of the second one-way drive ring is provided with a first fixing groove, the inner wall of the one-way bearing seat has a second fixing groove corresponding to the first fixing groove, and the one-way bearing seat is also provided with a second locking member for insertion into the first fixing groove and the second fixing groove.

[0016] By adopting the above technical solution, a connection method between the second one-way drive ring and the one-way bearing seat is disclosed. The second one-way drive ring is placed into the one-way bearing seat, and the second one-way drive ring is rotated so that the first fixing groove and the second fixing groove correspond. Finally, the second locking member is inserted into the first fixing groove and the second fixing groove to fix the second one-way drive ring and the lifting housing. This further improves the stability of the second one-way drive ring on the adjusting worm when the drive component rotates forward. The above locking method is simple and easy to assemble.

[0017] Optionally, the swing arm is provided on both end faces of the adjusting worm gear. The swing arm includes a swing arm rod coaxially connected to the adjusting worm gear. The swing arm rod extends radially along the axis of the adjusting worm gear and has a sliding rod at its end.

[0018] By adopting the above technical solution, the structural composition of the swing arm component is disclosed. Swing arms are provided on both sides of the adjusting worm, the swing arms are coaxially connected to the adjusting worm, the sliding rod and the adjusting worm wheel are eccentrically arranged, and the sliding rod is limited in the adjusting hole. When the swing arm component rotates, the lifting housing is adjusted relative to the fixed housing by the limiting of the sliding rod and the adjusting hole.

[0019] Optionally, the extension direction of the adjustment hole is perpendicular to the sliding direction of the lifting housing, and the outer wall of the lifting housing is provided with a clearance groove for the swing arm rod to rotate.

[0020] By adopting the above technical solution, the extension direction of the adjustment hole is limited, the sliding rod slides within the slotted hole, and under the limiting action of the fixed housing, the lifting housing moves back and forth within the fixed housing. The setting of the clearance groove makes the overall structure of the lifting mechanism more compact and reduces production costs.

[0021] Optionally, the sliding rod is provided with a rotating sliding sleeve.

[0022] By adopting the above technical solution, the inner and outer walls of the rotating sleeve are respectively rotated and abutted against the outer wall of the sliding rod and the inner wall of the strip hole. When the swing arm rotates, the sliding rod slides more smoothly in the adjustment hole, making the lifting and lowering of the lifting housing smoother.

[0023] Optionally, the lifting housing is further provided with a fixed seat on the side of the bearing cover away from the driving member, and the fixed seat is provided with a fixed bearing for rotating with the adjusting worm gear.

[0024] By adopting the above technical solution and fixing the bearing, the end of the adjusting worm gear near the drive component is stabilized, thereby improving the overall reliability of the lifting assembly.

[0025] A lawnmower includes the above-described lifting mechanism, characterized in that the driving component is a dual-axis drive, and the output shaft at the end of the driving component away from the lifting assembly is used to connect with the cutting blade.

[0026] By adopting the above technical solution, the output shafts at both ends of the drive unit are connected to the lifting assembly and the cutting blade, respectively. Users can adjust the lifting and lowering of the lifting housing by adjusting the forward and reverse rotation of the drive unit, and at the same time drive the cutting blade to rise and fall. When the drive unit rotates forward and reverses, the cutting blade can rotate and cut without affecting the normal operation of the cutting blade.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The lifting mechanism of this application includes a first one-way drive ring, an adjusting worm, an adjusting worm wheel, and a swing arm. The lifting assembly is started by controlling the forward and reverse rotation of the drive component, and the lifting adjustment method of the lifting housing is simple.

[0029] 2. By setting a second one-way drive ring, when the drive component rotates forward, the adjusting worm is locked to the lifting housing through the second one-way drive ring, which can reduce the impact of the forward rotation of the drive component on the adjusting worm and ensure the stability of the adjusting worm; when the drive component rotates in reverse, the adjusting worm and the lifting housing are disengaged, and the second one-way drive ring provides support for the adjusting worm, reducing the friction when the adjusting worm rotates.

[0030] 3. By setting a rotating sliding sleeve, this application makes the sliding rod slide more smoothly in the adjustment hole when the swing arm rotates, thus making the lifting and lowering of the lifting housing smoother. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the lifting assembly in an embodiment of this application.

[0033] Figure 3 This is a cross-sectional schematic diagram of the lifting component according to an embodiment of this application.

[0034] Figure 4 This is an exploded view of the first unidirectional drive ring and bearing cover in an embodiment of this application.

[0035] Figure 5 This is a cross-sectional schematic diagram of the second unidirectional drive ring and motor housing in an embodiment of this application.

[0036] Figure 6 This is an exploded view of the lifting assembly and motor housing according to an embodiment of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Fixed housing; 11. Adjustment hole; 12. Limiting contact surface; 2. Lifting housing; 21. Motor chamber; 22. Adjustment chamber; 23. Support base; 24. Motor fixing plate; 25. Fixing base; 251. Fixed bearing; 26. One-way bearing seat; 261. Second one-way drive ring; 2611. First fixing groove; 262. Second fixing groove; 263. Second locking element; 27. Worm gear bearing element; 28. Let... 3. Positioning groove; 4. Driving component; 5. Adjusting shaft; 6. Transmission shaft; 7. Lifting assembly; 8. First one-way driving ring; 9. Second locking groove; 10. Bearing cover; 11. Bearing groove; 21. First locking groove; 32. First locking component; 43. Adjusting worm gear; 5. Adjusting worm wheel; 6. Worm wheel shaft; 7. Swing arm component; 8. Swing arm rod; 9. Swing arm hole; 10. Sliding rod; 11. Rotary sliding sleeve. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0039] This application discloses a lifting mechanism and a lawnmower equipped with the mechanism.

[0040] Reference Figure 1 and Figure 2A lawnmower includes a fixed housing 1, a lifting housing 2 slidably mounted within the fixed housing 1, a drive component 3 fixed within the lifting housing 2, and a lifting assembly 4 connected to an output shaft at one end of the drive component 3 and used to drive the lifting housing 2 to move up and down. In this embodiment, the drive component 3 is a dual-axis motor, with the two axes defined as an adjustment shaft 31 and a transmission shaft 32. The adjustment shaft 31 is connected to the lifting assembly 4, and the transmission shaft 32 is located on the side of the drive component 3 away from the lifting assembly 4 and is used to connect to the cutting blades.

[0041] The fixed housing 1 is a rectangular housing with an opening at one end. The fixed housing 1 is composed of two symmetrical housings that are inserted together and fixed with bolts. The lifting housing 2 is a rectangular housing whose dimensions are adapted to the inner cavity of the fixed housing 1, and the lifting housing 2 is located at the open end of the fixed housing 1. The inner wall of the fixed housing 1 has a limiting abutment surface 12 for the lifting housing 2 to slide against.

[0042] The lifting housing 2 has a motor chamber 21 at one end for mounting the drive component 3, and an adjustment chamber 22 at the other end for mounting the lifting assembly 4. The motor chamber 21 and the adjustment chamber 22 are connected. A bracket 23 is integrally formed in the motor chamber 21 of the lifting housing 2, and a motor mounting plate 24 is fixed inside the bracket 23. The motor mounting plate 24 has a shaft hole for the adjustment shaft 31 to pass through, and the motor bracket has bolt holes circumferentially opened on the outer side of the shaft hole for bolt connection with the drive component 3.

[0043] Reference Figure 2 and Figure 3 The lifting assembly 4 includes a first one-way drive ring 41 connected to the adjusting shaft 31, a bearing cover 42, an adjusting worm gear 43, an adjusting worm wheel 44, and a swing arm 45. In this embodiment, the first one-way drive ring 41 is a one-way bearing component, and its structural principle is consistent with the prior art.

[0044] The inner ring of the first one-way drive ring 41 is keyed to the adjusting shaft 31, and the outer ring of the first one-way drive ring 41 is fixedly connected to the bearing cover 42. When the drive component 3 rotates forward, the first one-way drive ring 41 functions normally as a bearing, with the outer and inner rings sliding relative to each other, and the drive component 3 and the lifting assembly 4 are in a separated state; when the drive component 3 rotates in reverse, the first one-way drive ring 41 is locked, the outer and inner rings rotate synchronously, and the drive component 3 drives the lifting assembly 4 to rotate.

[0045] Reference Figure 3 and Figure 4The bearing cover 42 has a bearing groove 421 on its end face facing the drive member 3, which is adapted to the outer ring of the first one-way drive ring 41. The bearing cover 42 has a first locking groove 4211 along the axial direction of the bearing groove 421, extending to the opening of the bearing groove 421. The outer ring of the first one-way drive ring 41 has a second locking groove 411 corresponding to the first locking groove 4211. The bearing cover 42 includes a first locking member 422 inserted into the first locking groove 4211 and the second locking groove 411. The first locking member 422 is a columnar pin used to lock and fix the bearing cover 42 and the first one-way drive ring 41.

[0046] The bearing cover 42 and the end of the adjusting worm 43 are integrally formed and coaxially arranged. The lifting housing 2 also has an integrally formed fixing seat 25 on the side of the adjusting worm 43 near the bearing cover 42, and a fixing bearing 251 is fixedly installed inside the fixing seat 25. The fixing bearing 251 and the adjusting worm 43 are rotatably engaged to improve the stability of the adjusting worm 43 during rotation.

[0047] The lifting housing 2 has a one-way bearing seat 26 integrally provided on the side of the adjusting worm gear 43 away from the bearing cover 42, and a second one-way drive ring 261 that cooperates with the end of the adjusting worm gear 43 is installed on the one-way bearing seat 26. The second one-way drive ring 261 has the same structure as the first one-way drive ring 41, the difference being that the locking directions are opposite.

[0048] Combination Figure 5 The outer wall of the second one-way drive ring 261 has a first fixing groove 2611 along the axial direction, and the inner wall of the one-way bearing seat 26 has a second fixing groove 262 corresponding to the first fixing groove 2611. The one-way bearing seat 26 is provided with a second locking member 263 for insertion into the first fixing groove 2611 and the second fixing groove 262. In this embodiment, the fixing method of the second one-way drive ring 261 and the one-way bearing seat 26 is consistent with the fixing method of the first one-way drive ring 41 and the bearing cover 42.

[0049] When the drive component 3 rotates forward, the adjusting worm 43 is locked to the lifting housing 2 via the second one-way drive ring 261. This reduces the probability of the adjusting shaft 31 rotating and affecting the adjusting worm 43, ensuring that the adjusting worm 43 remains in a fixed state. When the drive component 3 rotates in reverse, the second one-way drive ring 261 functions as a bearing, and the adjusting worm 43 and the one-way bearing seat 26 are separated.

[0050] Reference Figure 2 and Figure 6 The adjusting worm wheel 44 is driven by the adjusting worm 43, and the axis of the adjusting worm wheel 44 is perpendicular to the axis of the adjusting worm 43. Both end faces of the adjusting worm wheel 44 are integrally provided or welded with a worm wheel shaft 441 that is connected to the swing arm 45.

[0051] The swing arm component 45 includes a swing arm rod 451 and a sliding rod 452, which are integrally formed and together are L-shaped. The swing arm rod 451 has a swing arm hole 4511 that is coaxially fixed with the worm gear shaft 441. The sliding rod 452 is located at the end of the swing arm rod 451 away from the swing arm hole 4511, that is, the extension axis of the sliding rod 452 and the worm gear shaft 441 are staggered. The opposite side walls of the fixed housing 1 each have a strip-shaped adjustment hole 11 that penetrates the two end faces and allows the sliding rod 452 to slide. The lifting housing 2 is connected to the fixed housing 1 through the sliding rod 452.

[0052] In this embodiment, the extension direction of the adjustment hole 11 is perpendicular to the length direction of the fixed housing 1. The swing arm 45 also has a rotating sleeve 453 fitted onto the sliding rod 452. The inner and outer walls of the rotating sleeve 453 rotatably abut against the side wall of the sliding rod 452 and the inner wall of the adjustment hole 11, respectively, to reduce the friction during sliding of the sliding rod 452 and improve the smoothness of sliding.

[0053] The lifting housing 2 is further provided with a worm gear bearing 27 rotatably mounted in the adjusting chamber 22, which cooperates with the worm gear shaft 441. The worm gear bearing 27 is a conventional rotary bearing. The end of the worm gear shaft 441 extends out of the lifting housing 2, and the outer wall of the lifting housing 2 has a clearance groove 28 for the swing arm 45 to rotate.

[0054] The principle of the lifting mechanism of the lawnmower in this embodiment is as follows: the start of the lifting assembly 4 is controlled by the forward and reverse rotation of the driving component 3. When the driving component 3 rotates forward, the adjusting shaft 31 drives the inner ring of the first one-way driving ring 41 to rotate, while the outer ring of the first one-way driving ring 41 slides relative to the inner ring. At this time, the adjusting shaft 31 and the lifting assembly 4 are in a separated state, and the second one-way driving ring 261 and the one-way bearing seat 26 are in a locked state. The transmission shaft 32 at the other end of the driving component 3 drives the cutting blade to rotate to cut grass.

[0055] When the drive component 3 reverses, the first one-way drive ring 41 is locked, and the adjusting shaft 31 can drive the adjusting worm 43, the adjusting worm wheel 44, and the swing arm 45 to rotate. The lifting housing 2 can be lifted and slid back and forth through the limiting cooperation of the sliding rod 452 and the adjusting hole 11. The outer ring and inner ring of the second one-way drive ring 261 are separated, and the cutting blade can adjust its height while cutting.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lifting mechanism, characterized in that, The device includes a fixed housing (1), a lifting housing (2) disposed within the fixed housing (1), a drive unit (3) disposed within the lifting housing (2), and a lifting assembly (4) connected to one end of the output shaft of the drive unit (3) and used to drive the lifting housing (2) to slide relative to the fixed housing (1). The lifting assembly (4) includes a first one-way drive ring (41), which is unidirectionally connected to the drive unit (3). When the drive member (3) rotates forward, the drive member (3) slips with the first one-way drive ring (41). When the drive member (3) rotates in reverse, the drive member (3) is connected to the first one-way drive ring (41) in a transmission connection. The drive member (3) drives the lifting assembly (4). The lifting assembly (4) further includes a bearing cover (42) for mounting the first one-way drive ring (41), an adjusting worm (43) connected to the bearing cover (42), an adjusting worm wheel (44) connected to the adjusting worm (43) in a transmission manner, and a swing arm (45) connected to the adjusting worm wheel (44). The swing arm (45) has a sliding rod (452) that is intersected with the axis of the adjusting worm wheel (44). The fixed housing (1) is provided with a strip-shaped adjusting hole (11) for limiting the arrangement of the sliding rod (452). The two end faces of the adjusting worm gear (44) are provided with the swing arm (45). The swing arm (45) includes a swing arm rod (451) coaxially connected to the adjusting worm gear (44). The swing arm rod (451) extends radially along the axis of the adjusting worm gear (44) and is provided with the sliding rod (452) at its end.

2. The lifting mechanism according to claim 1, characterized in that, The bearing cover (42) has a bearing groove (421) adapted to the outer ring of the first one-way drive ring (41). The bearing cover (42) has a first locking groove (4211) on the inner wall of the bearing groove (421). The outer ring of the first one-way drive ring (41) has a second locking groove (411) corresponding to the first locking groove (4211). The bearing cover (42) is provided with a first locking member (422) for insertion into the first locking groove (4211) and the second locking groove (411).

3. A lifting mechanism according to claim 1, characterized in that, The adjusting worm (43) is provided with a second one-way drive ring (261) at the end away from the drive member (3). The locking direction of the second one-way drive ring (261) is opposite to that of the first one-way drive ring (41). The lifting housing (2) has a one-way bearing seat (26) for mounting the second one-way drive ring (261).

4. A lifting mechanism according to claim 3, characterized in that, The side wall of the second one-way drive ring (261) is provided with a first fixing groove (2611), the inner wall of the one-way bearing seat (26) has a second fixing groove (262) corresponding to the first fixing groove (2611), and the one-way bearing seat (26) is also provided with a second locking member (263) for insertion into the first fixing groove (2611) and the second fixing groove (262).

5. A lifting mechanism according to claim 1, characterized in that, The extension direction of the adjustment hole (11) is perpendicular to the sliding direction of the lifting housing (2), and the outer wall of the lifting housing (2) is provided with a clearance groove (28) for the swing arm rod (451) to rotate.

6. A lifting mechanism according to claim 5, characterized in that, The sliding rod (452) is fitted with a rotating sliding sleeve (453).

7. A lifting mechanism according to claim 1, characterized in that, The lifting housing (2) is further provided with a fixed seat (25) on the side of the bearing cover (42) away from the drive member (3), and a fixed bearing (251) for rotating with the adjusting worm (43) is provided in the fixed seat (25).

8. A lawnmower, comprising the lifting mechanism according to any one of claims 1-7, characterized in that, The drive unit (3) is a dual-axis drive, and the output shaft of the drive unit (3) away from the lifting assembly (4) is used to connect with the cutting blade.

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