Agricultural vehicle frame and tall crop operation vehicle with double-axle all-wheel drive free-steering chassis.

Abstract

This invention provides an agricultural vehicle frame and a tall crop operation vehicle with a double-section axle all-wheel drive free-steering chassis. The agricultural vehicle frame includes a chassis and an upper frame mounted on the chassis. The chassis includes two sets of longitudinal double-section axles arranged symmetrically on the left and right sides. Each longitudinal double-section axle is equipped with a rocker arm, and a movable connecting rod is rotatably mounted at both ends of the rocker arm. One end of the movable connecting rod is horizontally rotatably connected to the rocker arm, and a first active push rod connects the movable connecting rod and the rocker arm. The other end of the movable connecting rod is horizontally rotatably mounted with a driving wheel, and a second active push rod connects the movable connecting rod and the driving wheel. The upper frame is a gantry frame, and the left and right sides of the upper frame are vertically rotatably connected to the rocker arms of the two sets of longitudinal double-section axles, respectively. A third active push rod connects the rocker arms and the upper frame. This invention uses a double-section axle design, which can realize complex steering operations. Combined with the gantry upper frame with a central passage, it can operate in tall crop fields.

Description

Technical Field

[0001] This invention relates to agricultural machinery, specifically to an agricultural vehicle frame and a tall crop operation vehicle with a double-axle all-wheel drive free-steering chassis. Background Technology

[0002] Tall crops refer to plants that grow taller than ordinary crops, such as corn, sorghum, and sugarcane. Because of their greater height, these crops require machinery with specific capabilities to operate in tall crop fields.

[0003] At the same time, the uneven terrain of tall crop fields places higher demands on the mobility, passability, and attitude adjustment of machinery. Summary of the Invention

[0004] This invention provides an agricultural vehicle frame with a double-axle all-wheel drive free-steering chassis. The agricultural vehicle frame includes a chassis and an upper frame mounted on the chassis.

[0005] The chassis includes two sets of longitudinal double-section axles arranged symmetrically on the left and right. The longitudinal double-section axles are equipped with rocker arms. A movable connecting rod is rotatably installed at both ends of the rocker arms. One end of the movable connecting rod is horizontally rotatably connected to the rocker arms. A first active push rod is connected between the movable connecting rod and the rocker arms. A travel wheel with a drive component is horizontally rotatably installed at the other end of the movable connecting rod. A second active push rod is connected between the movable connecting rod and the travel wheel.

[0006] The upper frame is a gantry frame. The left and right sides of the upper frame are respectively connected to the rocker arms of two sets of longitudinal double-section bridges in a vertical rotational manner. A third active push rod is connected between the rocker arms and the upper frame.

[0007] Furthermore, the first active push rod, the second active push rod, and the third active push rod are electric push rods or hydraulic push rods;

[0008] The driving component is a drive motor or drive motor.

[0009] Furthermore, each rocker arm is equipped with a pair of swing mounting brackets arranged on the left and right sides of the rocker arm. The swing mounting brackets on both sides of the rocker arm are fixedly connected by a flange shaft. The rocker arm has through holes on the left and right sides and bearings are installed there. The flange shaft passes through the bearings and rotates with the bearings.

[0010] The top of the swing mounting bracket is equipped with a frame mounting block, and the upper frame is bolted to the frame mounting blocks of the two pairs of swing mounting brackets on both sides.

[0011] Furthermore, the upper frame is fixedly connected to the swing mounting brackets on both sides via modular connecting plates;

[0012] The module connection plate consists of two "I"-shaped plates and a middle connection plate. The top of a pair of swing mounting brackets on both sides of each rocker arm is fixedly connected by an "I"-shaped plate, and the middle of the "I"-shaped plates on the left and right sides is fixedly connected by the middle connection plate.

[0013] The I-shaped plate and the swing mounting frame are fixedly connected by bolts, and the two I-shaped plates are fixedly connected to the middle connecting plate by bolts.

[0014] Furthermore, the intermediate connecting plate is a flat plate or a U-shaped plate, with the U-shaped plate installed upright or upside down between the two I-shaped plates.

[0015] Furthermore, the upper frame is provided with a left frame and a right frame that are fixedly installed on the two "I"-shaped plates on both sides. There is a gap between the left frame and the right frame and the top is fixedly connected by a connecting top frame.

[0016] Both the left and right frames include two longitudinal support plates located on both sides of the longitudinal double-section axle. The top of the longitudinal support plates is vertically connected to the outer frame, and the two longitudinal support plates are connected to the floor platform in the middle.

[0017] Both the longitudinal support plate and the rocker arm are U-shaped metal frames with a downward-recessed center.

[0018] Furthermore, the third active push rod is located on the left and right sides of the front and / or rear sides of the upper frame.

[0019] Furthermore, each first active push rod and each second active push rod works relatively independently, while each third active push rod works synchronously.

[0020] The advantages of this invention are:

[0021] 1) An innovative double-joint steering drive axle was proposed, which can realize the swing of each wheel on the one hand, and the wheel track can be changed by coordinating the steering of the front and rear wheel sets on the other hand, thus increasing the applicability of the scenario;

[0022] 2) It adopts a double-section axle design, which can achieve greater angle adjustment of the wheels, and the rotation angle of each wheel can be adjusted independently. The double-section steering drive axles on both sides of the chassis, together with the all-wheel drive transmission system, can realize various steering controls such as stationary steering, crab steering, and Ackermann steering.

[0023] 3) Compared to traditional transverse bridges, the bridge in this application is a longitudinal bridge (longitudinal bridge), that is, located on both sides of the chassis in the direction of travel, so that the front middle section of the frame forms a passage for tall crops to pass through.

[0024] This layout allows the vehicle to better handle different road conditions during driving, improving stability and passability. Furthermore, the longitudinal bridge design helps improve space utilization, allowing for a larger interior space without changing the overall dimensions of the vehicle.

[0025] 4) The walking wheels are directly driven by the drive unit, which simplifies the mechanical structure. The drive unit directly drives the walking wheels, making the power transmission more direct, thereby improving the mobility and operating efficiency of the agricultural vehicle in tall crop fields. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural diagram of an agricultural vehicle frame for a double-section axle all-wheel drive free-steering chassis according to the present invention;

[0028] Figure 2 This is a side view of the agricultural vehicle frame of the present invention;

[0029] Figure 3 A schematic diagram showing the upper frame of an agricultural vehicle in an absolutely horizontal state when going up a slope;

[0030] Figure 4 This is a perspective view of the chassis and the bottom frame of the upper frame of the agricultural vehicle frame of the present invention;

[0031] Figure 5 for Figure 4 Side view;

[0032] Figure 6 This is a structural diagram of a chassis consisting of two sets of longitudinal double-section bridges and a modular connecting plate used to connect the two sets of longitudinal double-section bridges.

[0033] Figure 7 This is a structural diagram of a single-sided longitudinal double-section bridge;

[0034] Figure 8 This is a schematic diagram of a single-sided longitudinal double-section bridge in an inward-facing (eight-legged) configuration.

[0035] Figure 9 This is a schematic diagram of a single-sided longitudinal double-section bridge in an outward octagonal configuration;

[0036] Figure 10 The diagram shows the installation of the intermediate connecting plates of the module connecting plate, which are flat plates, upright U-shaped plates, and inverted U-shaped plates. Detailed Implementation

[0037] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0038] To fully understand this invention, detailed steps and structures will be presented in the following description to illustrate the technical solution of this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0039] Reference Figure 1-8 As shown, the present invention provides an agricultural vehicle frame with a double-axle all-wheel drive free-steering chassis, the agricultural vehicle frame having a chassis 1000 and an upper frame 2000 mounted on the chassis 1000.

[0040] Chassis 1000

[0041] like Figure 7 As shown, the chassis 1000 includes two sets of longitudinal double-section axles 1100 arranged symmetrically on the left and right. Each longitudinal double-section axle 1100 is equipped with a rocker arm 1101. A movable connecting rod 1102 is rotatably mounted at both ends of the rocker arm 1101. One end of the movable connecting rod 1102 is horizontally rotatably connected to the rocker arm 1101. A first active push rod 1103 connects the movable connecting rod 1102 and the rocker arm 1101. The other end of the movable connecting rod 1102 is horizontally rotatably mounted with a traveling wheel 1300 equipped with a drive component 1301. A second active push rod 1104 connects the movable connecting rod 1102 and the traveling wheel 1300. The drive component 1301 can be a drive motor or a drive motor, preferably a hub motor.

[0042] Through the above structure, the longitudinal double-section axle of the present invention can achieve a larger swing amplitude of the wheels: 1) The rotation between the movable link 1102 and the rocker arm 1101 is driven by the extension and retraction of the first active push rod 1103; the first-level attitude adjustment of the wheels, i.e., axle steering, is realized; 2) The rotation between the movable link 1102 and the traveling wheel 1300 is driven by the extension and retraction of the second active push rod 1104; the swing adjustment of the traveling wheel 1300 can be performed again on the basis of the first-level attitude adjustment, i.e., wheel steering, so as to achieve a larger swing amplitude of the wheels.

[0043] This invention proposes a dual-joint steering drive axle. Figure 7-9 Schematic diagrams of a single-sided longitudinal double-section bridge in three different states are shown. Figure 7The diagram shows one of the longitudinal double-section axles in a straight-line driving state. When both longitudinal double-section axles are in this state, the chassis is in a straight-line driving state. Complex steering of the chassis can be achieved by controlling the left and right rotation of the movable connecting rod 1102 through the first active push rod 1103 and controlling the left and right swing of the traveling wheel 1300 through the second active push rod 1104. Figure 8 The diagram shown is a schematic of one of the longitudinal double-section bridges, which is octagonal inward. Figure 9 The diagram shows one of the longitudinal double-section bridges, which is octagonal in shape.

[0044] This structure, through its ingenious design, enables the wheels to achieve a greater range of oscillation. This design primarily relies on the extension and retraction of two active push rods to drive the rotation between the connecting rod and the rocker arm. First, the extension and retraction of the first active push rod 1103 drives the rotation between the movable connecting rod 1102 and the rocker arm 1101. This rotation achieves primary wheel attitude adjustment, defined in this application as bridge steering. Second, the extension and retraction of the second active push rod 1104 drives the rotation between the movable connecting rod 1102 and the traveling wheel 1300. Based on the primary attitude adjustment, this rotation can further adjust the wheel's oscillation, defined in this application as wheel steering. This design allows for a greater range of wheel oscillation, enabling the vehicle to better adapt to various road conditions during driving. This invention employs a two-stage adjustment method, allowing for a greater range of wheel adjustment, and the steering of each wheel can be controlled independently, enabling more complex steering, such as stationary steering, crab steering, Ackermann steering, and other steering controls.

[0045] 2000 upper frame

[0046] The upper frame 2000 is a gantry frame, forming a passage 2400 in the middle for tall crops to pass through. As the agricultural machinery vehicle travels in the field of tall crops, the tall crops enter the middle passage 2400 of the upper frame 2000 for processing including but not limited to harvesting.

[0047] The upper frame 2000 is vertically and rotatably connected to the rocker arms 1101 of the two sets of longitudinal double-section axles 1100 on the left and right sides respectively. A third active push rod 2001 is connected between the rocker arms 1101 and the upper frame 2000. The upper frame 2000 is driven to swing back and forth relative to the chassis 1000 through the third active push rod 2001. When the chassis climbs a slope, the upper frame 2000 is kept in an absolutely horizontal state.

[0048] The first active push rod 1103, the second active push rod 1104, and the third active push rod 2001 are preferably hydraulic push rods or electric push rods, with hydraulic push rods being preferred.

[0049] In an alternative embodiment, such as Figure 7As shown, each rocker arm 1101 has a pair of swing mounting brackets 1200 arranged on the left and right sides of the rocker arm 1101. The swing mounting brackets 1200 on both sides of the rocker arm 1101 are fixedly connected by flange shafts 1201. The rocker arm 1101 has through holes on the left and right sides of the middle and bearings 1105 are installed there. The flange shafts 1201 pass through the bearings 1105 and rotate with the bearings 1105. The top of the swing mounting bracket 1200 is provided with a frame mounting block 1202. The upper frame 2000 is fixedly connected to the frame mounting blocks 1202 of the two pairs of swing mounting brackets 1200 by bolts.

[0050] In one embodiment, the two sets of longitudinal double-section axles 1100 can be directly fixedly connected by the upper frame 2000. This requires the upper frame 2000 to have sufficient rigidity and strength, but it can simplify the mechanism.

[0051] In another embodiment, the upper frame 2000 is fixedly connected to the swing mounting brackets 1200 on both sides via a module connecting plate 1400, and the two sets of longitudinal double-section bridges 1100 are fixedly connected by the module connecting plate 1400. Figure 6 As shown, the modular connecting plate 1400 consists of two I-shaped plates 1401 and a middle connecting plate 1402. The tops of a pair of swing mounting brackets 1200 on both sides of each rocker arm 1101 are fixedly connected by an I-shaped plate 1401, and the I-shaped plates 1401 on the left and right sides are fixedly connected by the middle connecting plate 1402. The I-shaped plates 1401 and the swing mounting brackets 1200 are fixedly connected by bolts, and the two I-shaped plates 1401 and the middle connecting plate 1402 are fixedly connected by bolts. This invention adopts a modular design. After the two sets of longitudinal double-section bridges 1100 are assembled separately, they are connected together by the modular connecting plate 1400 to form a chassis, thus forming an integral chassis structure. This modular design not only facilitates assembly and disassembly during the production process, but also provides high flexibility in maintenance and component replacement. The use of the modular connection plate 1400 allows for quick connection between the upper frame 2000 and the rocker arm 1101, ensuring the stability and reliability of the chassis structure. Furthermore, the modular design allows for customized adjustments to the chassis to suit different operating environments and conditions, based on varying usage requirements.

[0052] In addition, the I-shaped plate 1401 connected to the swing mounting bracket 1200 adopts a special structural design. Since the I-shaped plate 1401 is used to fix the swing mounting bracket 1200 and the upper frame 2000, and the upper frame 2000 will swing back and forth under certain working conditions to ensure that the upper frame 2000 is in an absolutely horizontal position, the I-shaped plate 1401 will also swing back and forth accordingly. The grooves on both sides of the middle part of the I-shaped plate 1401 serve as reserved space for swinging, so that the I-shaped plate 1401 does not interfere with the rocker arm 1101 during the back and forth swinging process, making the swing amplitude of the upper frame 2000 larger.

[0053] In this invention, the intermediate connecting plate 1402 is a flat plate (e.g., Figure 6 (As shown) or a U-shaped plate, the appropriate shape of the intermediate connecting plate 1402 is selected according to the operational requirements to connect the "I"-shaped plates 1401 on the left and right sides. When a U-shaped plate is used as the intermediate connecting plate 1402, the bottom height of the middle channel 2400 of the agricultural vehicle frame is reduced, thereby increasing the overall height of the channel 2400 (as shown). Figure 10 As shown in (b)); when an inverted U-shaped plate is used as the intermediate connecting plate 1402, the bottom height of the middle passage of the agricultural vehicle frame is raised, which can prevent the agricultural vehicle from knocking over seedlings during travel (such as...). Figure 10 (as shown in (c)).

[0054] In an optional embodiment, the upper frame 2000 is provided with a left frame 2100 and a right frame 2200 respectively fixedly installed on the two "I"-shaped plates 1401. The left frame 2100 and the right frame 2200 are spaced apart and their tops are fixedly connected by a connecting top frame 2300. The left frame 2100 and the right frame 2200 each include two longitudinal support plates 2101 located on both sides of the longitudinal double-section bridge 1100. The top of the longitudinal support plate 2101 is vertically connected to an outer frame 2102, and a floor platform 2103 is connected between the two longitudinal support plates 2101.

[0055] like Figure 5 As shown, both the longitudinal support plate 2101 and the rocker arm 1101 are U-shaped metal frames with a downward-recessed center. This design lowers the chassis's center of gravity and improves vehicle stability. The floor platform 2103, located between the longitudinal support plates 2101, provides a stable working platform for operators and also serves as a mounting base for other vehicle components. The outer frame 2102 not only enhances the overall structural strength of the chassis but also serves as a mounting point for other equipment, such as the powertrain or auxiliary equipment. Furthermore, the design of the longitudinal support plates 2101 takes into account the need for easy maintenance and component replacement, ensuring high reliability of the vehicle during long-term use.

[0056] Each of the first active push rods 1103 and each of the second active push rods 1104 operates relatively independently to achieve complex steering, while the third active push rod 2001 operates synchronously and needs to cooperate to ensure that the upper frame 2000 is in an absolutely level state. The first active push rod 1103, the second active push rod 1104, and the third active push rod 2001 can be either electric push rods or hydraulic push rods.

[0057] In this invention, the third active push rods 2001 are arranged on the left and right sides of the rear side of the upper frame 2000. A pushing force is applied by a pair of third active push rods 2001 on the rear side of the upper frame 2000 to ensure the absolute horizontal state of the upper frame 2000 (e.g., ...). Figure 3 As shown in the diagram, the upper frame 2000 can also be controlled to be parallel to the slope using the third active push rod 2001. In another embodiment, a pair of third active push rods 2001 can be provided on the front and rear sides of the upper frame 2000 to adjust the attitude of the upper frame 2000. The two pairs of third active push rods 2001 distributed on the front and rear sides cooperate with each other, making the adjustment of the upper frame 2000 more precise and stable. The structural design of the third active push rod 2001 allows for flexible adjustment under different load conditions, ensuring the balance of the upper frame 2000 in various working states. Furthermore, the installation position of the third active push rod 2001 can be adjusted according to actual needs to adapt to different vehicle designs and usage requirements.

[0058] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. An agricultural vehicle frame with a double-section axle all-wheel drive free-steering chassis, the agricultural vehicle frame comprising a chassis (1000) and an upper frame (2000) mounted on the chassis (1000), characterized in that, The chassis (1000) includes two sets of longitudinal double-section axles (1100) arranged symmetrically on the left and right. The longitudinal double-section axle (1100) is provided with a rocker arm (1101). A movable connecting rod (1102) is rotatably installed at both ends of the rocker arm (1101). One end of the movable connecting rod (1102) is horizontally rotatably connected to the rocker arm (1101). A first active push rod (1103) is connected between the movable connecting rod (1102) and the rocker arm (1101). A traveling wheel (1300) with a drive component (1301) is horizontally rotatably installed at the other end of the movable connecting rod (1102). A second active push rod (1104) is connected between the movable connecting rod (1102) and the traveling wheel (1300). The upper frame (2000) is a gantry frame. The left and right sides of the upper frame (2000) are vertically rotatably connected to the rocker arms (1101) of the two sets of longitudinal double-section bridges (1100). A third active push rod (2001) is connected between the rocker arms (1101) and the upper frame (2000).

2. The agricultural vehicle frame of a double-section axle all-wheel drive free-steering chassis as described in claim 1, characterized in that, The first active push rod (1103), the second active push rod (1104), and the third active push rod (2001) are electric push rods or hydraulic push rods; The drive component (1301) is a drive motor or drive motor.

3. The agricultural vehicle frame of a double-section axle all-wheel drive free-steering chassis as described in claim 1, characterized in that, Each rocker arm (1101) has a pair of swing mounting brackets (1200) arranged on the left and right sides of the rocker arm (1101) in the middle. The swing mounting brackets (1200) on both sides of the rocker arm (1101) are fixedly connected by a flange shaft (1201). The rocker arm (1101) has through holes on the left and right sides in the middle and is equipped with bearings (1105). The flange shaft (1201) passes through the bearings (1105) and rotates with the bearings (1105). The top of the swing mounting bracket (1200) is provided with a frame mounting block (1202), and the upper frame (2000) is fixedly connected to the frame mounting blocks (1202) of the two pairs of swing mounting brackets (1200) by bolts.

4. The agricultural vehicle frame of a double-section axle all-wheel drive free-steering chassis as described in claim 3, characterized in that, The upper frame (2000) is fixedly connected to the swing mounting brackets (1200) on both sides via the module connecting plate (1400); The module connection plate (1400) consists of two "I" shaped plates (1401) and a middle connection plate (1402). The tops of a pair of swing mounting brackets (1200) on both sides of each rocker arm (1101) are fixedly connected by an "I" shaped plate (1401), and the "I" shaped plates (1401) on the left and right sides are fixedly connected by the middle connection plate (1402). The I-shaped plate (1401) and the swing mounting bracket (1200) are fixedly connected by bolts, and the two I-shaped plates (1401) and the intermediate connecting plate (1402) are fixedly connected by bolts.

5. The agricultural vehicle frame of a double-section axle all-wheel drive free-steering chassis as described in claim 4, characterized in that, The intermediate connecting plate (1402) is a flat plate or a U-shaped plate, which is installed upright or upside down between two I-shaped plates (1401).

6. The agricultural vehicle frame of a double-section axle all-wheel drive free-steering chassis as described in claim 4, characterized in that, The upper frame (2000) is provided with a left frame (2100) and a right frame (2200) respectively fixedly installed on the two sides of the "I" shaped plate (1401). There is a gap between the left frame (2100) and the right frame (2200) and their tops are fixedly connected by a connecting top frame (2300). The left frame (2100) and the right frame (2200) both include two longitudinal support plates (2101) located on both sides of the longitudinal double-section axle (1100). The top of the longitudinal support plate (2101) is vertically connected to the outer frame (2102), and the floor platform (2103) is connected between the two longitudinal support plates (2101). Both the longitudinal support plate (2101) and the rocker arm (1101) are U-shaped metal frames with a downward-recessed center.

7. The agricultural vehicle frame of a double-section axle all-wheel drive free-steering chassis as described in claim 1, characterized in that, The third active push rod (2001) is located on the left and right sides of the front and / or rear sides of the upper frame (2000).

8. A tall crop handling vehicle, characterized in that, The tall crop operation vehicle is equipped with an agricultural vehicle frame as described in any one of claims 1-7.

Images