Wheel type chassis with adjustable wheel track and wheel base
The adjustable wheel spacing and axis distance design for sugarcane harvesters addresses the issue of row spacing mismatch, preventing damage and enhancing stability in uneven terrain.
Patent Information
- Application Number
- CN202422204608.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The chassis walking wheel pitch of the existing sugar cane combined harvester is fixed, which makes it difficult to match the sugar cane row spacing in different sugar cane plots, and it is easy to crush the sugar cane to be harvested.
A wheel chassis with adjustable wheelbase is designed, and dynamic adjustment of the travel wheel pitch is achieved through hydraulic motor drive and rotary cylinder control, ensuring matching with sugarcane row spacing, and adopting four-wheel drive and steering design to suit different plots.
The precise matching of the distance between the walking wheel and the sugarcane row is achieved, which avoids sugarcane losses and improves the passing performance and turning ability in rugged plots.
Smart Images
Figure CN223100815U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a component of a sugarcane combine harvester, in particular to a wheeled chassis with adjustable wheelbase and track width for a sugarcane combine harvester, belonging to the technical field of agricultural machinery equipment. Background Art
[0002] A sugarcane combine harvester is an integrated machine that can complete a series of operations such as knocking down sugarcane, dividing rows, cutting off the tips, cutting the roots, feeding, conveying, stripping leaves, separating impurities, and collecting sugarcane in a sugarcane field. When the sugarcane combine harvester is operating, it walks back and forth in the sugarcane field and harvests sugarcane row by row. When harvesting sugarcane, the walking wheels on both sides of the chassis of the sugarcane combine harvester should walk on the open space between the rows on both sides of the sugarcane harvesting row, and at the same time, the harvesting device located on the longitudinal center line of the sugarcane combine harvester performs the harvesting operation on the sugarcane in the harvesting row. Since the row spacing of sugarcane planting in each sugarcane field is not uniform, generally ranging from 1.2 meters to 1.7 meters, and the track width of the walking wheels of the existing sugarcane combine harvester chassis on the market is fixed, there is often a phenomenon that the track width does not match the sugarcane row spacing. Once the difference is too large, when harvesting the sugarcane in the harvesting row, the walking wheels will inevitably press some of the adjacent rows of sugarcane to be harvested, resulting in a certain amount of sugarcane loss. Content of the Utility Model
[0003] The purpose of the utility model is to provide a wheeled chassis with adjustable wheelbase and track width. After the sugarcane combine harvester uses this chassis, the wheelbase and track width of the walking wheels can be adjusted in advance according to the row spacing of sugarcane planting in the sugarcane field, so that the actual track width matches the sugarcane row spacing, and in this way, the walking wheels will not press the adjacent rows of sugarcane to be harvested during the harvesting operation.
[0004] The specific technical solution of the utility model is as follows:
[0005] A wheeled chassis with adjustable wheelbase and track width is provided with a horizontally arranged bridge. At the front and rear ends of the bridge, on both the left and right sides, there is respectively connected with an outwardly extending swivel arm steering assembly through a connecting end. At the lower end of each of the four swivel arm steering assemblies, there is also connected with a driving walking assembly.
[0006] The swing arm steering assembly is provided with a swing arm that can swing horizontally. The tail end of the swing arm is hinged to the connection end of the bridge through a vertically arranged swing arm connecting shaft. The head end of the swing arm is hinged with a motor seat connecting shaft that is vertically arranged and penetrates through the swing arm up and down. Inside the swing arm near the longitudinal center line of the bridge, there is a swing arm oil cylinder. The cylinder block of the swing arm oil cylinder is hinged to the connection end of the bridge, and the piston rod of the swing arm oil cylinder is hinged to the arm body of the swing arm. The swing arm is driven by the swing arm oil cylinder to swing horizontally. Outside the swing arm away from the longitudinal center line of the bridge, there is a steering oil cylinder. The cylinder block of the steering oil cylinder is hinged to the arm body at the tail end of the swing arm, and the piston rod of the steering oil cylinder is hinged to one end of a horizontally arranged push rod. The other end of the push rod is fixedly connected to the upper end of the motor seat connecting shaft. The steering oil cylinder drives the rotation of the motor seat connecting shaft through the push rod.
[0007] The driving and walking assembly is provided with a motor seat fixedly connected to the lower end of the motor seat connecting shaft. A hydraulic motor is installed on the motor seat. The driving shaft of the hydraulic motor points to the outside away from the longitudinal center line of the bridge and is fixedly connected with a walking wheel. The rotation of the walking wheel is controlled by the hydraulic motor to drive the walking wheel to move forward. The steering oil cylinder drives the rotation of the motor seat connecting shaft to drive the walking wheel to turn.
[0008] Furthermore, two sets of swing arm oil cylinder synchronizers and two sets of steering oil cylinder synchronizers are also provided on the bridge. The two sets of swing arm oil cylinder synchronizers respectively control the synchronous actions of the two front swing arm oil cylinders and the two rear swing arm oil cylinders, and the two sets of steering oil cylinder synchronizers respectively control the synchronous actions of the two front steering oil cylinders and the two rear steering oil cylinders, so that the front and rear positions and steering of the two front walking wheels are kept consistent, and the front and rear positions and steering of the two rear walking wheels are kept consistent, preventing the two front walking wheels or the two rear walking wheels from presenting inconsistent arrangements such as in-toe or out-toe, which affects the overall steering of the chassis.
[0009] The chassis of the present utility model realizes the adjustment of the wheelbase and track of the front and rear walking wheels by installing the walking wheels on a swing arm that can swing horizontally and setting a swing arm oil cylinder to drive the swing arm to swing. Thus, the track of the walking wheels can be pre-adjusted according to the row spacing of sugarcane planting in the sugarcane field to match it with the sugarcane row spacing. When performing harvesting operations, the walking wheels will not press on the adjacent rows of sugarcane to be harvested, thereby avoiding sugarcane losses. In addition, this chassis adopts a four-wheel drive and four-wheel steering design, with a small overall turning radius and good passing performance, and is very suitable for use in narrow and rugged sugarcane fields. Moreover, when the swing arm of this chassis swings, the wheelbase and track are adjusted simultaneously. When the track increases, the wheelbase will decrease, and when the track decreases, the wheelbase will increase. The simultaneous adjustment of the wheelbase and track can maintain the stability of the chassis support and can maintain a small turning radius. Description of the Drawings
[0010] Figure 1 It is a three-dimensional structural schematic diagram of this chassis.
[0011] Figure 2 It is the top view of the left part of this chassis.
[0012] Figure 3 It is Figure 2 the sectional view taken along the line A-A in
[0013] Figure 4 It is Figure 3 the partial enlarged view of B in
[0014] Figure 5 It is the top view of the right turn control when the wheelbase of this chassis is shrunk to the shortest and the wheelbase is extended to the longest.
[0015] Figure 6 It is Figure 5 the top view of the right turn control when the middle chassis is adjusted to increase the wheelbase and decrease the wheelbase in
[0016] In the figure: 1-bridge, 1.1-connecting end, 2-rotating arm, 2.1-bearing seat, 3-rotating arm connecting shaft, 4-motor seat connecting shaft, 5-rotating arm oil cylinder, 6-steering oil cylinder, 7-push-pull rod, 8-motor seat, 9-hydraulic motor, 10-traveling wheel, 11-rotating arm oil cylinder synchronizer, 12-steering oil cylinder synchronizer, 13-inner cone sleeve, 14-outer cone sleeve, 15-tapered roller bearing, 16-middle spacer sleeve, 17-upper spacer sleeve, 18-lower spacer sleeve, 19-lock nut, 20-bearing cover, 21-opening pin. Specific implementation manners
[0017] The following further describes the present utility model in conjunction with the accompanying drawings. In the description of the present utility model, the orientation terms of "front", "rear", "left", and "right" are defined based on the perspective of the driver of the sugarcane combine harvester.
[0018] As Figures 1-3 shown, this chassis is provided with a horizontally arranged bridge 1. The front and rear ends of the bridge 1 are respectively connected with an outwardly extending rotating arm steering assembly on both the left and right sides through connecting ends 1.1, and a driving travel assembly is also connected to the lower end of each of the four rotating arm steering assemblies.
[0019] The swing arm steering assembly is provided with a swing arm 2 that can swing horizontally. The tail end of the swing arm 2 is hinged to the connecting end 1.1 of the bridge frame 1 through a vertically arranged swing arm connecting shaft 3. The head end of the swing arm 2 is hinged with a motor seat connecting shaft 4 that is vertically arranged and penetrates through the swing arm 2 up and down. Inside the swing arm 2 near the longitudinal center line of the bridge frame 1, there is a swing arm oil cylinder 5. The cylinder block of the swing arm oil cylinder 5 is hinged to the connecting end 1.1 of the bridge frame 1, and the piston rod of the swing arm oil cylinder 5 is hinged to the arm body of the swing arm 2. The swing arm 2 is driven to swing horizontally by the swing arm oil cylinder 5. Outside the swing arm 2 away from the longitudinal center line of the bridge frame 1, there is a steering oil cylinder 6. The cylinder block of the steering oil cylinder 6 is hinged to the arm body at the tail end of the swing arm 2, and the piston rod of the steering oil cylinder 6 is hinged to one end of a horizontally arranged push rod 7. The other end of the push rod 7 is fixedly connected to the upper end head of the motor seat connecting shaft 4. The steering oil cylinder 6 drives the rotation of the motor seat connecting shaft 4 through the push rod 7.
[0020] The driving and traveling assembly is provided with a motor seat 8 fixedly connected to the lower end head of the motor seat connecting shaft 4. A hydraulic motor 9 is installed on the motor seat 8. The driving shaft of the hydraulic motor 9 points to the outside away from the longitudinal center line of the bridge frame 1 and is fixedly connected with a traveling wheel 10. The rotation of the traveling wheel 10 is controlled by the hydraulic motor 9 to drive the traveling wheel 10 to travel. The steering oil cylinder 6 drives the traveling wheel 10 to turn by driving the rotation of the motor seat connecting shaft 4.
[0021] Furthermore, two sets of swing arm oil cylinder synchronizers 11 and two sets of steering oil cylinder synchronizers 12 are also provided on the bridge frame 1. The two sets of swing arm oil cylinder synchronizers 11 respectively control the synchronous actions of the two swing arm oil cylinders 5 on the left side of the bridge frame 1 and the two swing arm oil cylinders 5 on the right side of the bridge frame 1. The two sets of steering oil cylinder synchronizers 12 respectively control the synchronous actions of the two steering oil cylinders 6 on the left side of the bridge frame 1 and the two steering oil cylinders 6 on the right side of the bridge frame 1, so as to accurately control the steering of the traveling wheel 10 and prevent the front two traveling wheels 10 or the rear two traveling wheels 10 from being arranged in an in - toe or out - toe pattern.
[0022] Furthermore, when the four swing arm oil cylinders 5 are in the state of being contracted to the shortest, the four swing arms 2 swing to the innermost side of the bridge frame 1 and are parallel to the longitudinal center line of the bridge frame 1.
[0023] When the chassis of the present utility model bears the traveling of the sugarcane combine harvester, the swing arm 2 serves as the extended cantilever supporting the traveling wheel 10. The hinge joint between the tail end of the swing arm 2 and the connecting end 1.1 of the bridge frame 1 will bear a large tangential force. The axial position deviation and radial position deviation of each component at the hinge joint are likely to cause uneven stress, resulting in excessive local stress and rapid wear of the parts. In order to improve the durability of the parts and the load - bearing capacity of the chassis, the structure of this hinge joint needs to be specially designed.
[0024] As Figures 3-4As shown in the figure, the specific structure of the hinge joint between the tail end of the swing arm 2 and the connection end 1.1 of the bridge frame 1 is as follows: The connection end 1.1 of the bridge frame 1 is provided with two horizontal ear plates, upper and lower. The upper and lower ear plates are respectively provided with upper ear holes and lower ear holes. The upper ear hole and the lower ear hole are coaxially arranged up and down, and the aperture of the lower ear hole is larger than that of the upper ear hole. An inner tapered sleeve 13 that can slide up and down is sleeved in the lower ear hole. An outer tapered sleeve 14 with its upper end extending into the inner tapered sleeve 13 is sleeved below the inner tapered sleeve 13. A horizontally arranged bearing seat 2.1 is welded to the tail end of the swing arm 2 and extends between the upper and lower ear plates. Two back-to-back tapered roller bearings 15 are arranged up and down in the bearing seat 2.1. An intermediate spacer sleeve 16 is arranged between the two tapered roller bearings 15. An upper spacer sleeve 17 is arranged between the upper tapered roller bearing 15 and the bottom surface of the upper ear plate. A lower spacer sleeve 18 is arranged between the lower tapered roller bearing 15 and the top surface of the inner tapered sleeve 13 on the lower ear plate. A swing arm connecting shaft 3 with a clamping head at its upper end passes through the upper ear hole of the upper ear plate, the upper spacer sleeve 17, the upper tapered roller bearing 15, the intermediate spacer sleeve 16, the lower tapered roller bearing 15, the lower spacer sleeve 18, the inner tapered sleeve 13, and the outer tapered sleeve 14 in sequence from top to bottom and then connects to a locking nut 19. The locking nut 19 locks the up and down position of the swing arm 2 by pushing against the tapered surfaces of the outer tapered sleeve 14 and the inner tapered sleeve 13, and keeps the swing arm connecting shaft 3 in a vertical state. Thus, the swing of the swing arm 2 can be smooth and without resistance, and at the same time, the load-bearing capacity of the chassis is also improved.
[0025] Further, bearing covers 20 with oil seals are also arranged at the upper and lower ends of the bearing seat 2.1 for sealing.
[0026] Further, a split pin 21 penetrating the shaft body is also arranged at the position of the swing arm connecting shaft 3 below the locking nut 19 to prevent the locking nut 19 from loosening.
[0027] As Figures 5-6 shown, the working process of this chassis is as follows:
[0028] First, adjust the wheelbase of the walking wheels 10 according to the row spacing of sugarcane planting in the sugarcane field. Control the four swing arm cylinders 5 to extend or shorten synchronously through the two groups of swing arm cylinder synchronizers 11, so that the four swing arms 2 are synchronously abducted or synchronously adducted. Then, control the left and right walking wheels 10 to turn to a position parallel to the longitudinal direction of the bridge frame 1 through the two groups of steering cylinder synchronizers 12. When the swing arm 2 is abducted, the wheelbase increases and the wheel track decreases. When the swing arm 2 is adducted, the wheelbase decreases and the wheel track increases. After adjusting to the appropriate wheelbase, lock the four swing arm cylinders 5 through the two groups of swing arm cylinder synchronizers 11, and then the work can be started.
[0029] During the working process, when the chassis needs to turn left and move forward, two steering cylinders 6 on the left side of the bridge 1 are synchronously contracted through a set of steering cylinder synchronizers 12, and two steering cylinders 6 on the right side of the bridge 1 are synchronously extended through another set of steering cylinder synchronizers 12. The corresponding steering cylinders 6 drive the two walking wheels 10 on the front side of the bridge 1 to turn left simultaneously through the push rods 7, and at the same time, the two walking wheels 10 on the rear side of the bridge 1 turn right simultaneously, so that the chassis can turn left and move forward. Similarly, when the chassis needs to turn right and move forward, two steering cylinders 6 on the right side of the bridge 1 are synchronously contracted through a set of steering cylinder synchronizers 12, and two steering cylinders 6 on the left side of the bridge 1 are synchronously extended through another set of steering cylinder synchronizers 12. The corresponding steering cylinders 6 drive the two walking wheels 10 on the front side of the bridge 1 to turn right simultaneously through the push rods 7, and at the same time, the two walking wheels 10 on the rear side of the bridge 1 turn left simultaneously, so that the chassis can turn right and move forward.
[0030] The above illustrations are only typical embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A wheeled chassis with adjustable wheelbase and track, characterized in that: The chassis is provided with a horizontally arranged bridge (1). At the front and rear ends of the bridge (1), on both the left and right sides thereof, a swing arm steering assembly extending outward is connected respectively through a connecting end (1.1). At the lower ends of the four swing arm steering assemblies, a driving and walking assembly is also connected respectively. The swing arm steering assembly is provided with a swing arm (2) that can swing horizontally. The tail end of the swing arm (2) is hinged to the connecting end (1.1) of the bridge (1) through a vertically arranged swing arm connecting shaft (3). The head end of the swing arm (2) is hinged with a motor seat connecting shaft (4) that is vertically arranged and penetrates through the swing arm (2) up and down. Inside the swing arm (2) near the longitudinal center line of the bridge (1), a swing arm oil cylinder (5) is provided. The cylinder seat of the swing arm oil cylinder (5) is hinged to the connecting end (1.1) of the bridge (1), and the piston rod of the swing arm oil cylinder (5) is hinged to the arm body of the swing arm (2). The swing arm (2) is driven to swing horizontally by the swing arm oil cylinder (5). Outside the swing arm (2) away from the longitudinal center line of the bridge (1), a steering oil cylinder (6) is provided. The cylinder seat of the steering oil cylinder (6) is hinged to the arm body at the tail end of the swing arm (2), and the piston rod of the steering oil cylinder (6) is hinged to one end of a horizontally arranged push-pull rod (7). The other end of the push-pull rod (7) is fixedly connected to the upper end head of the motor seat connecting shaft (4). The motor seat connecting shaft (4) is driven to rotate by the steering oil cylinder (6) through the push-pull rod (7). The driving and walking assembly is provided with a motor seat (8) fixedly connected to the lower end head of the motor seat connecting shaft (4). A hydraulic motor (9) is installed on the motor seat (8). The driving shaft of the hydraulic motor (9) points to the outside away from the longitudinal center line of the bridge (1) and is fixedly connected with a walking wheel (10). The rotation of the walking wheel (10) is controlled by the hydraulic motor (9) to drive the walking wheel (10) to walk. The steering oil cylinder (6) drives the walking wheel (10) to turn by driving the rotation of the motor seat connecting shaft (4).
2. The wheeled chassis with adjustable track and wheelbase according to claim 1, characterized in that: On the bridge (1), two groups of swing arm oil cylinder synchronizers (11) and two groups of steering oil cylinder synchronizers (12) are also provided. The two groups of swing arm oil cylinder synchronizers (11) respectively control the synchronous actions of the two swing arm oil cylinders (5) on the left side of the bridge (1) and the two swing arm oil cylinders (5) on the right side of the bridge (1). The two groups of steering oil cylinder synchronizers (12) respectively control the synchronous actions of the two steering oil cylinders (6) on the left side of the bridge (1) and the two steering oil cylinders (6) on the right side of the bridge (1).
3. The wheeled chassis with adjustable wheelbase and track according to claim 1, characterized in that: When the four swing arm oil cylinders (5) are in the state of being contracted to the shortest, the four swing arms (2) swing to the innermost side of the bridge (1) and are parallel to the longitudinal center line of the bridge (1).
4. The wheeled chassis with adjustable track and wheelbase according to claim 1, characterized in that: The specific structure of the hinge joint between the tail end of the swing arm (2) and the connection end (1.1) of the bridge frame (1) is as follows: The connection end (1.1) of the bridge frame (1) is provided with two horizontal ear plates, the upper and lower ear plates are respectively provided with upper ear holes and lower ear holes, the upper ear hole and the lower ear hole are coaxially arranged up and down, and the aperture of the lower ear hole is larger than that of the upper ear hole. An inner conical sleeve (13) that can slide up and down is sleeved in the lower ear hole. An outer conical sleeve (14) with its upper end extending into the inner conical sleeve (13) is sleeved below the inner conical sleeve (13). A horizontally arranged bearing seat (2.1) is welded to the tail end of the swing arm (2) and extends between the upper and lower ear plates. Two back-to-back tapered roller bearings (15) are arranged up and down in the bearing seat (2.1). An intermediate spacer sleeve (16) is arranged between the two tapered roller bearings (15). An upper spacer sleeve (17) is arranged between the upper tapered roller bearing (15) and the bottom surface of the upper ear plate. A lower spacer sleeve (18) is arranged between the lower tapered roller bearing (15) and the top surface of the inner conical sleeve (13) on the lower ear plate. A swing arm connecting shaft (3) with a clamping head at the upper end passes through the upper ear hole of the upper ear plate, the upper spacer sleeve (17), the upper tapered roller bearing (15), the intermediate spacer sleeve (16), the lower tapered roller bearing (15), the lower spacer sleeve (18), the inner conical sleeve (13), and the outer conical sleeve (14) from top to bottom in sequence and then connects a lock nut (19). The up and down position of the swing arm (2) is locked by the lock nut (19) pushing against the conical surfaces of the outer conical sleeve (14) and the inner conical sleeve (13), and the swing arm connecting shaft (3) is kept in a vertical state.
5. The wheeled chassis with adjustable wheelbase and track according to claim 4, characterized in that: Sealing is carried out by bearing covers (20) with oil seals at the upper and lower ends of the bearing seat (2.1).
6. The wheeled chassis with adjustable wheelbase and track according to claim 4, characterized in that: An opening pin (21) passing through the shaft body is also arranged at the position of the swing arm connecting shaft (3) below the lock nut (19).