Cutterhead lifting mechanism and mower

Abstract

The utility model provides a lifting mechanism of a cutter head and a mower. The lifting mechanism of the cutter head comprises a frame body, a driving assembly and a rotating assembly, the frame body is suspended above the cutter head; the driving assembly is movably arranged on the frame body; the rotation assembly comprises a first rotation structure, a second rotation structure and a rotation connecting rod, and the first rotation structure and the second rotation structure are arranged at the first installation position and the second installation position respectively and connected through the rotation connecting rod; the driving assembly is in driving connection with the first rotation structure so that the second rotation structure can be linked through the first rotation structure on the moving stroke of the driving assembly, and the first installation position and the second installation position of the cutter head can synchronously ascend and descend. The utility model solves the technical problems that the single-point stress of the traditional cutterhead is easy to cause and the height is not uniform.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, and in particular to a blade lifting mechanism and a lawnmower. Background Technology

[0002] The blade of a lawnmower is the core component for cutting grass, and the stability and synchronization of its lifting mechanism directly affect the cutting effect, lawn smoothness, and equipment lifespan. Traditional lawnmower blade height adjustment usually adopts a single-point drive design. However, single-point force application can easily cause the blade to tilt during the lifting process, especially in operation scenarios with wide blades or large terrain undulations. The height of the two sides (or ends) of the blade is difficult to synchronize, resulting in uneven grass stubble height, local overload wear of the blades, and even blade deformation or damage to the drive mechanism due to uneven force. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a blade lifting mechanism and a lawnmower to solve the technical problems of uneven force and height caused by single-point force on traditional blades in related technologies.

[0004] This utility model provides a lifting mechanism for a cutter head, wherein the cutter head is provided with a first mounting position and a second mounting position at intervals, and the lifting mechanism includes:

[0005] The frame is suspended above the cutter head;

[0006] A drive assembly is movably mounted on the frame and has a first drive position and a second drive position during its travel. In the first drive position and the second drive position, it is used to drive the cutter head to descend or rise, respectively.

[0007] The rotary assembly includes a first rotary structure, a second rotary structure, and a rotary connecting rod. The first rotary structure and the second rotary structure are respectively located at the first mounting position and the second mounting position, and are connected to each other by the rotary connecting rod.

[0008] The drive component is connected to the first rotary structure so that, during the active stroke of the drive component, the first rotary structure links with the second rotary structure, and the first and second mounting positions of the cutter head are raised and lowered synchronously.

[0009] Furthermore, the drive assembly includes a handle lever, a height adjustment link, and a drive link connected in sequence. The height adjustment link is rotatably mounted on the frame. Under the action of an external force, the handle lever can drive the height adjustment link to swing, so that the drive link stays in the first drive position or the second drive position.

[0010] Furthermore, one end of the handle is inserted into the height adjustment linkage, and the other end is bent into shape.

[0011] Furthermore, the drive linkage is located between the frame and the cutter head, and the three are spaced apart.

[0012] Furthermore, the first slewing structure includes: a first bracket and two first booms. The first bracket is rotatably mounted on the frame and connected to the drive link and the slewing link. The two first booms are mounted opposite each other on the first bracket and are used to connect different areas of the first installation position.

[0013] Furthermore, the drive link and the rotary link are arranged in an alternating manner.

[0014] Furthermore, the second rotating structure includes a second bracket and two second booms. The second bracket is rotatably mounted on the frame and connected to the rotating connecting rod. The two second booms are mounted opposite each other on the second bracket and are used to connect different areas of the second installation position.

[0015] Furthermore, the second rotating structure also includes two positioning links, which are respectively arranged in correspondence with the two second booms, and the two ends of the positioning links are respectively hinged to the second boom and the frame.

[0016] Furthermore, the direction from the first installation position to the second installation position is defined as the first direction, and the direction from the first driving position to the second driving position is defined as the second direction, with the first direction and the second direction being parallel to each other.

[0017] This utility model also provides a lawnmower, including the lifting mechanism described above.

[0018] Compared to existing technologies, this invention offers the following advantages: The drive assembly is connected to the first rotary structure, and the first rotary structure is connected to the second rotary structure via a rotary linkage, forming a drive system for this mechanism. This system connects the first and second mounting positions of the cutter head, enabling synchronous lifting and lowering of the cutter head at different positions through the coordinated operation of the drive system. This solves the problem of cutter head tilting caused by uneven force distribution in traditional single-point drive methods, avoids wear caused by local overload of the cutter head, and reduces the risk of cutter head deformation or damage to the drive mechanism. Furthermore, controlling the lifting and lowering of the cutter head through a centralized drive assembly simplifies the operation process, making it easier for operators to learn and reducing the time and effort required for manual adjustment, thus making operation more convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the lifting mechanism in one embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Top view;

[0021] Figure 3 for Figure 1 Another structural diagram;

[0022] Figure 4 This is a schematic diagram of the lifting mechanism in one embodiment of the present invention, omitting the frame and cutter head;

[0023] Figure 5 for Figure 4 A structural diagram from another angle.

[0024] Explanation of icon numbers:

[0025] 1. Cutter head;

[0026] 2. Frame;

[0027] 3. Drive assembly; 301. Handle lever; 302. Height adjustment linkage; 303. Drive linkage;

[0028] 4. First rotating structure; 401. First support; 402. First boom;

[0029] 5. Second rotating structure; 501. Second bracket; 502. Second boom; 503. Positioning link;

[0030] 6. Rotation linkage.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0033] In the embodiments of this utility model, such as Figures 1-3As shown, the lifting mechanism of the cutter head includes: a frame 2, a drive assembly 3, and a rotary assembly; the frame 2 is suspended above the cutter head 1; the drive assembly 3 is movably mounted on the frame 2 and has a first drive position and a second drive position on its travel stroke, which are used to drive the cutter head 1 to descend or rise respectively in the first drive position and the second drive position; the rotary assembly includes a first rotary structure 4, a second rotary structure 5, and a rotary linkage 6, the first rotary structure 4 and the second rotary structure 5 are respectively located at the first mounting position and the second mounting position, and are connected to each other through the rotary linkage 6; wherein, the drive assembly 3 is drivenly connected to the first rotary structure 4 so that the first rotary structure 4 links the second rotary structure 5 on the travel stroke of the drive assembly 3, and the first mounting position and the second mounting position of the cutter head 1 are raised and lowered synchronously.

[0034] Specifically, in this embodiment of the invention, a first mounting position and a second mounting position are formed at two symmetrical locations on the cutter head 1, respectively, for connecting the drive system to realize the raising or lowering of the cutter head 1. A frame 2 is provided above the cutter head 1, the frame 2 having a length direction and a width direction, and the drive assembly 3 is mounted on the frame 2.

[0035] Specifically, the drive assembly 3 is connected to the cutter head 1 via a rotary assembly, enabling it to rise and fall as needed. The drive assembly 3 has a first drive position and a second drive position along its travel. The rotary assembly includes a first rotary structure 4, a rotary linkage 6, and a second rotary structure 5 connected in sequence, driving the drive assembly 3 to the first rotary structure 4. The first rotary structure 4 and the second rotary structure 5 are respectively positioned at the first and second mounting positions of the cutter head 1. Thus, when the drive assembly 3 switches between the first and second drive positions, the first rotary structure 4 and the rotary linkage 6 can move the second rotary structure 5 in conjunction with it, thereby causing the external force acting on the first and second mounting positions of the cutter head 1 to rise and fall. Since the first and second mounting positions are symmetrically arranged at corresponding locations on the cutter head 1, the multi-point force application method ensures balanced force on the cutter head 1, preventing tilting during rising and falling, and thus making the cutter head 1 run more smoothly.

[0036] In this embodiment, a first rotary structure 4 and a second rotary structure 5 are respectively set at the first and second mounting positions of the cutter head 1, and the first rotary structure 4 and the second rotary structure 5 are connected by a rotary connecting rod 6 to form a whole. This allows the second rotary structure 5 to move synchronously when the drive component 3 drives the first rotary structure 4, thereby enabling the first and second mounting positions of the cutter head 1 to rise and fall synchronously, preventing the cutter head 1 from tilting due to uneven force distribution. Furthermore, using the same drive component 3 can synchronously drive different positions of the cutter head 1, simplifying the operation process and making the raising and lowering of the cutter head 1 more convenient.

[0037] like Figures 1-5 As shown, in one embodiment, the drive assembly 3 includes a handle 301, a height adjustment link 302, and a drive link 303 connected in sequence. The height adjustment link 302 is rotatably mounted on the frame 2. Under the action of an external force, the handle 301 can drive the height adjustment link 302 to swing, so that the drive link 303 stays in the first drive position or the second drive position. Specifically, to facilitate operation and drive the first rotating structure 4, this embodiment defines the drive assembly 3 as including a handle 301, a height adjustment link 302, and a drive link 303. The handle 301 is independently set with the frame 2, with one end extending above the frame 2 for easy hand operation. The other end of the handle 301 is connected to the height adjustment link 302, which is rotatably mounted on the frame 2 via a pivot. This allows the height adjustment link 302 to swing around the axis of the pivot when the handle 301 is pushed or pulled along the length of the frame 2 under external force. Simultaneously, one end of the drive link 303 is connected to the height adjustment link 302, and the other end extends along the length of the frame 2 to connect with the first rotating structure 4. Thus, when the height adjustment link 302 swings forward or backward, the corresponding drive link 303 can move accordingly, facilitating the pulling or pushing of the first rotating structure 4. Of course, the forward or backward positions mentioned above are relative positions. For example, the handle 301 can be placed at the front end of the frame 2, or the handle 301 can be placed at the rear end of the frame 2 to accommodate the installation position of components such as the cutter head 1.

[0038] Furthermore, such as Figure 1 , Figure 4As shown, in one embodiment, one end of the handle 301 is inserted into the height adjustment link 302, and the other end is bent into shape. Specifically, for ease of operation, this embodiment bends the end of the handle 301 away from the height adjustment link 302 to form a grip portion that can adapt to hand movements, and a clearance portion that can be used to avoid other components installed on the frame 2; that is, the handle 301 can form one or more corner points to adapt to operation and installation needs. In addition, the end of the handle 301 near the height adjustment link 302 can also be bent into shape and inserted into the height adjustment link 302 to increase the contact area with the height adjustment link 302, prevent it from coming out, and allow the height adjustment link 302 to swing unimpeded during the pushing of the handle 301, thereby allowing the drive link 303 to follow the movement.

[0039] Furthermore, such as Figure 1 As shown, the drive linkage 303 is located between the frame 2 and the cutter head 1, and the three are spaced apart. Specifically, in order to enable the cutter head 1 to rise and fall without obstruction and to expand its lifting space, this embodiment places the drive linkage 303 between the frame 2 and the cutter head 1, and the drive linkage 303 is on one side of the frame 2 along its width direction. Thus, the movement of the drive linkage 303 and the cutter head 1 can be relatively independent. Furthermore, the drive linkage 303 located on one side does not need to go around, and the handle 301 and the height adjustment linkage 302 can also be positioned on one side of the frame 2 according to the drive linkage 303, so as to facilitate one-handed operation.

[0040] like Figure 4 , Figure 5 As shown, in one embodiment, the first rotating structure 4 includes: a first support 401 and two first booms 402. The first support 401 is rotatably mounted on the frame 2 and connected to the drive link 303 and the rotating link 6. The two first booms 402 are mounted opposite to each other on the first support 401 and are used to connect different areas of the first installation position.

[0041] Specifically, in order to achieve the lifting and lowering of the first installation position of the cutter head 1, this embodiment defines the first rotating structure 4 as including a first bracket 401 and two first booms 402. The first bracket 401 is rotatably set at the frame 2 and extends in the width direction of the frame 2, so that the first bracket 401 forms two support blocks 1 symmetrically arranged along the width direction of the frame 2. The two first booms 402 are respectively rotatably connected to the two support blocks 1, and one of the two support blocks 1 is connected to the drive linkage 303, and the other is connected to the rotating linkage 6. In this way, after the two first booms 402 are respectively installed in the symmetrical area of ​​the first installation position, the first bracket 401 can be rotated under the pulling or pushing of the drive linkage 303, and the support blocks 1 can rotate accordingly. During this process, since the forward and reverse rotation of the support blocks 1 can drive the corresponding first booms 402 to lift and lower, the first booms 402 can drive the cutter head 1 to lift and lower the first installation position. Since there are two first booms 402, and the two first booms 402 are symmetrically installed in the symmetrical area of ​​the first installation position, the single first rotating structure 4 uses a two-point force-bearing method to adjust the height of the first installation position of the cutter head 1, so as to balance the force on the cutter head 1. Figure 5 As shown, the cross-section of the aforementioned support block one can be approximately triangular. The drive link 303 or the slewing link 6 can be installed at one of its apex corners, and the first boom 402 is installed at the other apex corner. A support rod can be installed at the remaining apex corner to connect the two support blocks one, forming the first bracket 401. Preferably, the drive link 303 and the slewing link 6 are staggered. Of course, the structures of the two first booms 402 can be identical, or they can be adapted to the installation position; that is, the structures of the two first booms 402 can also be different.

[0042] like Figure 4 , Figure 5 As shown, in one embodiment, the second rotating structure 5 includes: a second bracket 501 and two second booms 502. The second bracket 501 is rotatably mounted on the frame 2 and connected to the rotating connecting rod 6. The two second booms 502 are mounted opposite to each other on the second bracket 501 and are used to connect different areas of the second installation position.

[0043] Specifically, in order to drive the second mounting position of the cutter head 1 to rise and fall synchronously, this embodiment defines the second rotary structure 5 as including a second bracket 501 and two second booms 502. Similar to the first rotary structure 4, the second bracket 501 is rotatably mounted on the frame 2 and extends in the width direction of the frame 2 to form two symmetrically arranged support blocks 2. The two support blocks 2 are rotatably connected to the two booms, and one of them is also connected to the rotary linkage 6. Similarly, the two second booms 502 are respectively installed in the symmetrical area of ​​the second mounting position of the cutter head 1. Then, under the rotation of the support block 1, the rotary linkage 6 can pull the corresponding support block 2 to rotate, thereby causing the second bracket 501 to rotate as a whole. During this process, the second booms 502 can be raised or lowered, and then the second mounting position of the cutter head 1 can be raised or lowered using the second booms 502. At the second installation position, a symmetrical installation method is also used to drive the cutter head 1 to rise and fall. In conjunction with the first rotary structure 4, four driving points can be formed at the cutter head 1. During actual installation, the four driving points can be located at the four corners of a square, with equal distances between any two adjacent driving points. This ensures that the cutter head 1 is balanced and rises and falls smoothly through the combined action of all driving points. Furthermore, using the drive linkage 303 and the rotary linkage 6 as intermediate connecting components allows the first bracket 401 and the second bracket 501 to rotate synchronously. This allows the first boom 402 and the second boom 502 to simultaneously raise and lower the first and second installation positions of the cutter head 1, preventing tilting.

[0044] Furthermore, such as Figure 1 , Figure 4 , Figure 5 As shown, in one embodiment, the second rotating structure 5 further includes two positioning links 503, which are respectively arranged in a one-to-one correspondence with the two second booms 502. The two ends of the positioning links 503 are respectively hinged to the second booms 502 and the frame 2. Specifically, since the drive link 303 and the rotating link 6 are connected by the first bracket 401, they can also play a certain role in stabilizing the first installation position of the cutter head 1. However, the second installation position of the cutter head 1 is only supported by the second bracket 501, and its end may be affected by its own weight and fall, still posing a risk of tilting. Therefore, this embodiment sets two positioning links 503, so that the two positioning links 503 are respectively arranged in a one-to-one correspondence with the two second booms 502, and the two ends of the positioning links 503 are respectively hinged to the second booms 502 and the frame 2. In this way, during the lifting and lowering process of the cutter head 1, the positioning links 503 can play an auxiliary support role and improve its structural stability.

[0045] The direction from the first mounting position to the second mounting position is defined as the first direction, and the direction from the first driving position to the second driving position is defined as the second direction. The first direction and the second direction are parallel to each other. That is, pulling the driving component 3 forward and backward can make the front and rear ends of the cutter head 1 rise and fall synchronously.

[0046] This embodiment also provides a lawnmower, including the lifting structure described above. The specific structure of the lifting structure is as described in the above embodiment. Since this lawnmower adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lifting mechanism for a cutter head, wherein the cutter head is provided with a first mounting position and a second mounting position at intervals, characterized in that, The lifting mechanism includes: The frame is suspended above the cutter head; A drive assembly is movably mounted on the frame and has a first drive position and a second drive position during its travel. In the first drive position and the second drive position, it is used to drive the cutter head to descend or rise, respectively. The rotary assembly includes a first rotary structure, a second rotary structure, and a rotary connecting rod. The first rotary structure and the second rotary structure are respectively located at the first mounting position and the second mounting position, and are connected to each other by the rotary connecting rod. The drive component is connected to the first rotary structure so that, during the active stroke of the drive component, the first rotary structure links with the second rotary structure, and the first and second mounting positions of the cutter head are raised and lowered synchronously.

2. The lifting mechanism for the cutter head as described in claim 1, characterized in that, The drive assembly includes a handle, a height adjustment link, and a drive link connected in sequence. The height adjustment link is rotatably mounted on the frame. Under the action of an external force, the handle can drive the height adjustment link to swing, so that the drive link stays in the first drive position or the second drive position.

3. The lifting mechanism for the cutter head as described in claim 2, characterized in that, One end of the handle is inserted into the height adjustment link, and the other end is bent into shape.

4. The lifting mechanism for the cutter head as described in claim 2, characterized in that, The drive linkage is located between the frame and the cutter head, and the three are spaced apart.

5. The lifting mechanism for the cutter head as described in claim 2, characterized in that, The first slewing structure includes: a first bracket and two first booms. The first bracket is rotatably mounted on the frame and connected to the drive link and the slewing link. The two first booms are mounted opposite each other on the first bracket and are used to connect different areas of the first installation position.

6. The lifting mechanism for the cutter head as described in claim 5, characterized in that, The drive link and the rotary link are arranged alternately.

7. The lifting mechanism for the cutter head as described in any one of claims 1-6, characterized in that, The second slewing structure includes a second bracket and two second booms. The second bracket is rotatably mounted on the frame and connected to the slewing linkage. The two second booms are mounted opposite each other on the second bracket and are used to connect different areas of the second installation position.

8. The lifting mechanism for the cutter head as described in claim 7, characterized in that, The second slewing structure also includes two positioning links, which are respectively arranged in correspondence with the two second booms. The two ends of the positioning links are respectively hinged to the second boom and the frame.

9. The lifting mechanism for the cutter head as described in claim 1, characterized in that, The direction from the first installation position to the second installation position is defined as the first direction, and the direction from the first driving position to the second driving position is defined as the second direction. The first direction and the second direction are parallel to each other.

10. A lawnmower, characterized in that, Includes the lifting mechanism as described in any one of claims 1-9.

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