Synchronous transmission structure of cutterhead and rear wheel and mower
By using a synchronous transmission structure between the cutter head and the rear wheel, and by integrating the driven wheel on the same axis as the main drive wheel, the problems of poor structural compactness and susceptibility of the grass discharge port in lawnmowers are solved, resulting in more efficient grass discharge and more stable mowing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING DAJIANG POWER EQUIP MFG
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-12
AI Technical Summary
The existing lawnmower's drive system has poor compactness, complex power transmission components, and the grass discharge port is easily affected, leading to blockage of the grass passage and affecting mowing efficiency and stability.
The cutter head and rear wheel adopt a synchronous transmission structure. The first and second driven wheels are coaxially integrated through the main drive wheel. The cutter head pulley and rear wheel are synchronously driven by a single power source, which reduces the space occupied by the power component in the second installation area and increases the cross-sectional area of the grass discharge port.
This results in a more compact lawnmower structure and a larger discharge port, preventing grass accumulation and clogging, and improving mowing efficiency and stability.
Smart Images
Figure CN224218944U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lawnmower technology, and in particular to a synchronous transmission structure between the blade disc and the rear wheel, and a lawnmower. Background Technology
[0002] Currently, the drive system of lawnmowers has the following drawbacks:
[0003] 1. The cutter head and the rear wheel adopt an independent drive mode, which results in multiple power branches in the power transmission components of the drive system. This not only increases the complexity of mechanical components and manufacturing costs, but also causes low space utilization and poor overall structural compactness due to the split layout.
[0004] 2. For the dual-blade collaborative operation mode, the power transmission components of the drive system are densely integrated into the middle functional area of the blade disc, creating spatial interference with the grass discharge port at that location. This layout forces the flow cross-sectional area of the grass discharge port to be compressed to a critical threshold. When the instantaneous flow of grass surges or the operating load changes abruptly, it can easily cause blockage of the grass discharge channel, thereby affecting the continuous operation stability and mowing efficiency of the lawnmower. Utility Model Content
[0005] In view of the shortcomings of the existing technology, this utility model provides a synchronous transmission structure for the blade disc and the rear wheel and a lawnmower, so as to solve the technical problems of poor structural compactness and easy influence on the size of the grass discharge opening in the traditional transmission structure.
[0006] This utility model provides a synchronous transmission structure for a cutter head and a rear wheel, wherein the cutter head and the rear wheel are independently arranged, and the cutter head has two first mounting areas and a second mounting area located between the two first mounting areas; the synchronous transmission structure includes:
[0007] The main drive wheel is coaxially provided with a first driven wheel and a second driven wheel;
[0008] The first transmission assembly includes two cutter head pulleys, a first pulley, a second pulley, and a tension pulley. The two cutter head pulleys are rotatably disposed in two first mounting areas, and both are connected to the first driven pulley via a first belt. The first pulley is disposed in the second mounting area and is located outside the first belt. The second pulley and the tension pulley are disposed at intervals in any one of the first mounting areas for connection with the first belt.
[0009] The second transmission assembly is connected to the second driven wheel via a second belt and is used to drive the rear wheel to rotate;
[0010] Under the action of external force, the main drive wheel drives the first driven wheel and the second driven wheel to rotate simultaneously, so as to link the cutter head pulley and the rear wheel to move synchronously.
[0011] Furthermore, one of the cutter head pulleys, located near the tensioning wheel, is situated on the outer side of the first belt, while the other cutter head pulley is situated on the inner side of the first belt.
[0012] Furthermore, both the second pulley and the tensioner pulley are located inside the first belt.
[0013] Furthermore, the second pulley, the cutter head pulley, and the tensioning wheel are configured in a V-shape, with the opening direction facing away from the second mounting area.
[0014] Furthermore, the first pulley is positioned near the edge of the second mounting area.
[0015] Furthermore, the first pulley, the second pulley, and the tensioning pulley are directly or indirectly rotatably connected to the cutter head.
[0016] Furthermore, the second transmission assembly includes: a plurality of third pulleys and a rear axle assembly, wherein the plurality of third pulleys are spaced apart between the second driven wheel and the rear axle assembly and are connected therebetween by the second belt.
[0017] Furthermore, all of the third pulleys are located inside the second belt.
[0018] Furthermore, the first belt and the second belt are arranged at intervals from bottom to top.
[0019] This utility model also provides a lawnmower, including: the synchronous transmission structure as described above.
[0020] Compared with the prior art, this utility model has the following advantages: By integrating the first and second driven wheels into an integrated power output architecture with the main drive wheel coaxially, the cutter connected to the cutter head pulley and the rear wheel can be driven synchronously by a single power source through the first and second transmission components, making the overall structure more compact; furthermore, by moving the first pulley outward and compressing the space occupied by the power component in the second mounting area, the second mounting area only retains the mounting position of the first pulley, reducing the area used by the power component in the second mounting area, and concentrating the remaining components in the first mounting area, thereby maximizing the placement of the grass discharge port in the second mounting area. Compared with the original design, this increases the cross-sectional area of the grass discharge port, thereby avoiding the problems of grass accumulation and blockage. Attached Figure Description
[0021] Figure 1This is a schematic diagram of the synchronous transmission structure in one embodiment of the present invention;
[0022] Figure 2 for Figure 1 Side view;
[0023] Figure 3 This is a schematic diagram of the structure of the first transmission component in one embodiment of the present invention;
[0024] Figure 4 This is a schematic diagram of the structure of the second transmission component in one embodiment of the present invention.
[0025] Explanation of icon numbers:
[0026] 1. Cutter head; 101. First mounting area; 102. Second mounting area; 2. Rear wheel; 3. Main drive wheel; 4. First driven wheel; 5. Second driven wheel; 6. First transmission assembly; 601. Cutter head pulley; 602. First pulley; 603. Second pulley; 604. Tensioner; 605. First belt; 7. Second transmission assembly; 701. Third pulley; 702. Rear axle assembly; 703. Second belt.
[0027] 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
[0028] 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.
[0029] In the embodiments of this utility model, such as Figures 1-3 As shown, the synchronous transmission structure between the cutter head and the rear wheel includes: a main drive wheel 3, a first transmission assembly 6, and a second transmission assembly 7; the main drive wheel 3 is coaxially provided with a first driven wheel 4 and a second driven wheel 5; the first transmission assembly 6 includes two cutter head pulleys 601, a first pulley 602, a second pulley 603, and a tension wheel 604. The two cutter head pulleys 601 are rotatably disposed in two first mounting areas 101, and both are connected to the first driven wheel 4 via a first belt 605. The first pulley 602 is disposed in the second mounting area 102 and is located outside the first belt 605. The second pulley 603 and the tension wheel 604 are spaced apart in any one of the first mounting areas 101 for connection with the first belt 605; the second transmission assembly 7 is connected to the second driven wheel 5 via the second belt 703 for driving the rear wheel 2 to rotate.
[0030] Under the action of external force, the main drive wheel 3 drives the first driven wheel 4 and the second driven wheel 5 to rotate simultaneously, so as to link the cutter head pulley 601 and the rear wheel 2 to move synchronously.
[0031] Specifically, in this embodiment of the invention, the cutter disc 1 and the rear wheel 2 are independently arranged, and the cutter disc 1 has two first mounting areas 101 and a second mounting area 102 located between the two first mounting areas 101. A cutter is installed in the first mounting area 101, and the rotation of the cutter can transfer the forage to the second mounting area 102. Therefore, a discharge port is provided in the second mounting area 102, from which the forage cut by the cutter can be discharged.
[0032] In this embodiment of the invention, the main drive wheel 3 is located in front of the cutter head 1 and is coaxially connected to the first driven wheel 4 and the second driven wheel 5 via the output shaft. Thus, when the power assembly is applied to the main drive wheel 3, the first driven wheel 4 and the second driven wheel 5 rotate synchronously, forming an integrated power output architecture for a compact overall structure. On the other hand, the first driven wheel 4 is connected to the cutter at the cutter head 1 via the first transmission assembly 6, and the second driven wheel 5 is connected to the rear wheel 2 via the second transmission assembly 7. Therefore, a single power source can be used to drive the cutter and the rear wheel 2 to operate synchronously.
[0033] In this embodiment of the invention, the first transmission assembly 6 includes two cutter head pulleys 601, a first pulley 602, a second pulley 603, and a tensioning pulley 604. Figure 3 As shown, two cutter head pulleys 601 are rotatably mounted at two first mounting areas 101 to drive the cutters at those areas. Simultaneously, a first driven wheel 4 is connected to the two cutter head pulleys 601 via a first belt 605, enabling synchronous rotation of the two pulleys 601. A first pulley 602 is located in the second mounting area 102, outside the first belt 605. This facilitates power transmission and, by moving the first pulley 602 outward and compressing the space occupied by the power components in the second mounting area 102, more space is freed up in the second mounting area 102 to accommodate a larger cross-sectional area for the grass discharge opening, thus ensuring smooth grass discharge. In addition, the second pulley 603 and the tension pulley 604 are located in the first installation area 101 and connected to the first belt 605. This not only serves to transmit power, but also moves the second pulley 603 and the tension pulley 604 from the original second installation area 102 to the vacant first installation area 101, making them relatively independent from the grass discharge port and avoiding installation interference.
[0034] In this embodiment, by coaxially arranging a first driven wheel 4 and a second driven wheel 5 on the main drive wheel 3, the first driven wheel 4 and the second driven wheel 5 synchronously drive the first power assembly and the second power assembly to move. This causes the cutter head pulley 601 in the first power assembly to drive the connected cutter to rotate, and the second power assembly to drive the rear wheel 2 to rotate. A single power source can drive different components to move synchronously. In addition, only the first pulley 602 is set in the second mounting area 102 of the cutter head 1, while the rest are set in the first mounting area 101. After the transfer, most of the space in the second mounting area 102 is exposed, so that the grass discharge port can be maximized in the second mounting area 102, thereby improving the grass discharge capacity of the grass discharge port.
[0035] like Figure 1 , Figure 3 As shown, in one embodiment, one cutter head pulley 601, located near the tension wheel 604, is situated outside the first belt 605, while the other cutter head pulley 601 is located inside the first belt 605. Specifically, to prevent the different cutters located in the two first mounting areas 101 from rotating in different directions and thus avoiding airflow interference that could hinder the discharge of forage, this embodiment places the two cutter head pulleys 601 on the inner and outer sides of the first belt 605, respectively. Preferably, the second pulley 603 and the tension wheel 604 are both located inside the first belt 605. Thus, by utilizing the coordinated operation of the components, the rotation direction of the two cutter head pulleys 601 can be changed, thereby enabling the two cutters connected to the two cutter head pulleys 601 to rotate in opposite directions. Preferably, the second pulley 603, the cutter head pulley 601, and the tensioning pulley 604 are configured in a V-shape, with the opening direction facing away from the second mounting area 102; on the one hand, this satisfies the installation requirements of the first belt 605, and on the other hand, it can reduce the overall mounting area in the mounting area, so that other components can be installed there, further making the structure more compact.
[0036] Preferably, the first pulley 602 is positioned close to the edge of the second mounting area 102. The clearance of the first pulley 602 preserves most of the space in the second mounting area 102, allowing for the creation of a larger cross-sectional area for the discharge of straw, thus facilitating the smooth discharge of straw.
[0037] Furthermore, such as Figure 3 As shown, in one embodiment, the first pulley 602, the second pulley 603, and the tensioning pulley 604 are directly or indirectly rotatably connected to the cutter head 1. Specifically, each of the above pulleys can be directly rotatably mounted on the corresponding position of the cutter head 1 by a rotating shaft; or they can be indirectly rotatably connected to the cutter head 1 by forming a mounting bracket.
[0038] like Figure 1 , Figure 4 As shown, in one embodiment, the second transmission assembly 7 includes a plurality of third pulleys 701 and a rear axle assembly 702. The plurality of third pulleys 701 are spaced apart between the second driven wheel 5 and the rear axle assembly 702, and are connected therebetween by a second belt 703. Specifically, in order to drive the second driven wheel 5 to the rear wheel 2, this embodiment defines the second transmission assembly 7 as including a plurality of third pulleys 701 and the rear axle assembly 702, and uses a second belt 703 to connect each pulley thereto with the drive wheel of the rear axle assembly 702, thereby allowing the rear wheel 2 to rotate under the drive of the second driven wheel 5. Preferably, the plurality of third pulleys 701 are all located inside the second belt 703.
[0039] like Figure 2 As shown, in one embodiment, the first belt 605 and the second belt 703 are spaced apart from bottom to top. This arrangement adapts to the mounting height of the cutter head 1 and the rear axle assembly 702, and also improves the utilization of longitudinal space, making the structure more compact.
[0040] This embodiment also provides a lawnmower, including the synchronous transmission structure described above. The specific structure of the synchronous transmission 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.
[0041] 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 synchronous transmission structure for a cutter head and a rear wheel, wherein the cutter head and the rear wheel are independently arranged, and the cutter head has two first mounting areas and a second mounting area located between the two first mounting areas; characterized in that, The synchronous transmission structure includes: The main drive wheel is coaxially provided with a first driven wheel and a second driven wheel; The first transmission assembly includes two cutter head pulleys, a first pulley, a second pulley, and a tension pulley. The two cutter head pulleys are respectively located in the two first mounting areas, and both are connected to the first driven pulley via a first belt. The first pulley is located in the second mounting area and is situated outside the first belt. The second pulley and the tension pulley are spaced apart in any one of the first mounting areas for connection to the first belt. The second transmission assembly is connected to the second driven wheel via a second belt and is used to drive the rear wheel to rotate; Under the action of external force, the main drive wheel drives the first driven wheel and the second driven wheel to rotate simultaneously, so as to link the cutter head pulley and the rear wheel to move synchronously.
2. The synchronous transmission structure of the cutter head and rear wheel as described in claim 1, characterized in that, One cutter head pulley, located near the tensioning wheel, is positioned outside the first belt, while the other cutter head pulley is positioned inside the first belt.
3. The synchronous transmission structure of the cutter head and rear wheel as described in claim 2, characterized in that, Both the second pulley and the tensioner pulley are located inside the first belt.
4. The synchronous transmission structure of the cutter head and rear wheel as described in claim 3, characterized in that, The second pulley, the cutter head pulley, and the tensioning wheel are configured in a V-shape, with the opening direction facing away from the second mounting area.
5. The synchronous transmission structure between the cutter head and the rear wheel as described in any one of claims 1-4, characterized in that, The first pulley is positioned near the edge of the second mounting area.
6. The synchronous transmission structure between the cutter head and the rear wheel as described in any one of claims 1-4, characterized in that, The first pulley, the second pulley, and the tensioning pulley are directly or indirectly rotatably connected to the cutter head.
7. The synchronous transmission structure between the cutter head and the rear wheel as described in any one of claims 1-4, characterized in that, The second transmission assembly includes: a plurality of third pulleys and a rear axle assembly, wherein the plurality of third pulleys are spaced apart between the second driven wheel and the rear axle assembly and are connected therebetween by the second belt.
8. The synchronous transmission structure of the cutter head and the rear wheel as described in claim 7, characterized in that, The plurality of the third pulleys are all located inside the second belt.
9. The synchronous transmission structure of the cutter head and the rear wheel as described in claim 1, characterized in that, The first belt and the second belt are spaced apart from bottom to top.
10. A lawnmower, characterized in that, Includes the synchronous transmission structure as described in any one of claims 1-9.