Tractor capable of running in two directions

Abstract

The utility model discloses a bi-directional driving tractor which comprises a frame, the frame is provided with a power device, a brake device, a steering device, a clutch device, a rotating center sleeve and two sets of pedal assemblies, and each pedal assembly comprises an accelerator pedal, a brake pedal and a clutch pedal. Any brake pedal independently drives the brake device to operate through a first parallel mechanism, any clutch pedal independently drives the clutch device to operate through a second parallel mechanism, the frame is provided with a rotating frame, the rotating frame is locked on the frame through a first locking piece, and the rotating frame is provided with a steering gear assembly. The steering gear assembly is in driving connection with a steering gear arranged on the frame through a transmission mechanism, the steering gear is in driving connection with a steering device, and the frame is provided with a seat. And when the rotating frame rotates, the posture of the sitting mechanism is changed, and an operator can face the advancing direction. The first parallel mechanism prevents linkage of the two brake pedals, and the second parallel mechanism prevents linkage of the two clutch pedals.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a bidirectional traveling tractor. Background Art

[0002] In agricultural planting operations, wheeled tractors are widely used. During the operation of the tractor, most of the time, the forward gear is used. When the working space is relatively narrow and it is difficult for the tractor to turn, the reverse gear will be engaged for reversing. When reversing for a long time, the operator needs to move his head back and forth to observe the rearview mirrors on both sides or look back to observe the rear. Regardless of the observation method, it is easy to cause physical fatigue to the operator. The Chinese utility model with authorization announcement number CN216101674U discloses a forward and reverse driving tractor, in which the brake control system and the clutch control system are hydraulic and have a high cost. If two sets of clutch devices, brake devices, clutch control devices, and brake control devices are provided for a tractor that travels in both directions, the cost is also high. There is an urgent need for a two-way traveling tractor that can mechanically control a set of brake devices and a set of clutch devices when the tractor travels forward and backward. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a bidirectional traveling tractor capable of mechanically controlling a set of brake devices and a set of clutch devices when the tractor moves forward and backward.

[0004] In order to solve the above technical problems, the utility model includes a frame, which is provided with a power device, a brake device, a steering device and a clutch device. The frame is provided with a rotating center sleeve, and its structural characteristics are: the frame is provided with two sets of pedal assemblies, and the two sets of pedal assemblies are centrally symmetrically arranged on the left and right sides of the frame with the rotating center sleeve as the center. The pedal assembly includes an accelerator pedal, a brake pedal, and a clutch pedal that are controlled and connected to the power device. The two brake pedals are both connected to a first parallel mechanism provided on the frame. The two brake pedals can selectively drive the brake device through the first parallel mechanism. The two clutch pedals are both connected to a second parallel mechanism provided on the frame. The two clutch pedals can selectively drive the clutch device through the second parallel mechanism. The frame is provided with a rotating frame that can freely rotate around the axis of the rotating center sleeve. The rotating frame can be locked to the frame by a first locking member after rotation. The rotating frame is provided with a steering gear assembly. The steering gear assembly is driven and connected to a steering gear provided on the frame through a transmission mechanism. The steering gear is driven and connected to the steering device. The frame is provided with a seat.

[0005] With this structure, the two pedal assemblies can adapt to the operator's pedaling habits during forward and reverse travel. When the brakes need to be activated during forward and reverse travel, pressing one brake pedal independently activates the brakes via the first parallel mechanism, preventing the other brake pedal from engaging after pressing one brake pedal. When the clutch needs to be activated during forward and reverse travel, pressing one clutch pedal independently activates the clutch via the second parallel mechanism, preventing the other clutch pedal from engaging after pressing one clutch pedal, thereby improving operational safety. Before moving forward or backward, the seat's posture needs to be adjusted by rotating the rotating frame so that the operator can face the direction of travel. First, the vehicle is stopped, the first locking member is released, and the rotating frame is manually rotated about the axis of the rotating center sleeve. As the rotating frame rotates, the seat's posture changes. Once the adjustment is complete, the rotating frame is locked to the vehicle frame via the first locking member, preventing it from rotating randomly. To steer, the operator's input torque to the steering assembly is transmitted via the transmission mechanism to the steering gear, which then drives the steering mechanism, thereby steering.

[0006] The first linkage is hinged on the vehicle frame, and the first linkage is equipped with a first rocker arm and a second rocker arm, and the upper and lower parts of the first rocker arm are respectively provided with a first hanging part and a second hanging part, and the frame is hinged to a second linkage shaft and a third linkage shaft respectively located on the left and right sides of the first rocker arm, and the lower part of the brake pedal located on the left side of the frame is connected to the second linkage shaft, and the second linkage shaft is provided with a first linkage member, and the first linkage member and the first rocker arm are transmitted through the first connecting rod, one end of the first connecting rod is hinged on the upper part of the first linkage member and the other end is hinged on the first hanging part through the first elongated hole, and the lower part of the brake pedal located on the right side of the frame is connected to the third linkage shaft, and the third linkage shaft is provided with a second linkage member, and the second linkage member and the first rocker arm are transmitted through the second connecting rod, one end of the second connecting rod is hinged on the upper part of the second linkage member and the other end is hinged on the second hanging part through the second elongated hole, and the second rocker arm is driven and connected to the brake device through the third connecting rod.

[0007] The first linkage is hinged on the left side of the vehicle frame, and the second linkage is hinged on the first linkage and the sixth linkage. The third linkage is connected to the third rocker arm through the linkage, and the fourth rocker arm is connected to the vehicle frame through the linkage.

[0008] The transmission mechanism includes a first gear arranged at the output end of the steering gear assembly, the rotating center sleeve is provided with a freely rotatable ring gear, and the input end of the steering gear is provided with a second gear meshing with the ring gear.

[0009] The seat includes a fixed seat arranged on a rotating frame, the fixed seat is provided with a plurality of first sockets spaced apart in an upper and lower direction, the fixed seat is slidably connected to a seat body, the seat body is provided with a plurality of second sockets, and the seat body is locked in position on the fixed seat by a second locking member passing through the first sockets and the second sockets.

[0010] The first locking member is a cylindrical pin passing through the rotating frame, and the frame is provided with a plurality of pin holes capable of accommodating the first locking member after the rotating frame is rotated.

[0011] The vehicle frame is provided with a reversing valve, the steering gear is connected to the steering device via the reversing valve, the steering gear and the reversing valve are hydraulically driven, and the reversing valve and the steering device are hydraulically driven.

[0012] The reversing valve is a mechanical valve with a handle. The rotating frame is provided with a shifting rod, and the shifting rod can shift the handle of the reversing valve by rotating the rotating frame.

[0013] The steering gear assembly includes a steering wheel as an input end, the vehicle frame is provided with a first mounting seat, a second mounting seat is provided on the upper part of the first mounting seat, the steering wheel is arranged on the second mounting seat, and the steering wheel transmits the rotational force to the output end of the steering gear assembly through a rotation transmission component provided on the first mounting seat and the second mounting seat. The vertical distance from the steering wheel to the vehicle frame and the horizontal distance from the steering wheel to the seat can be adjusted.

[0014] The second mounting seat is hinged to the first mounting seat through a screw, the screw is threaded with a nut which abuts against the outer side surface of the first mounting seat, and the nut is provided with a handle.

[0015] By setting the first parallel mechanism, when the left brake pedal is stepped on, the second linkage shaft rotates counterclockwise, and the first linkage member rotates along with the second linkage shaft to swing counterclockwise around the axis of the second linkage shaft, and the first linkage member drives the first rocker arm to swing counterclockwise around the axis of the first linkage shaft through the first connecting rod. The swing of the first rocker arm causes the first linkage shaft to rotate so that the second rocker arm swings in the same direction as the first rocker arm, and the second rocker arm drives the brake device through the third connecting rod. When the first rocker arm swings, the second elongated hole can avoid the second hanging part to prevent the brake pedal on the right side of the frame from being linked; when the right brake pedal is stepped on, the third linkage shaft rotates clockwise, and the second linkage member rotates along with the third linkage shaft to swing clockwise around the axis of the third linkage shaft, and the second linkage member drives the first rocker arm to swing counterclockwise around the axis of the first linkage shaft through the second connecting rod. The swing of the first rocker arm causes the first linkage shaft to rotate so that the second rocker arm swings in the same direction as the first rocker arm, and the second rocker arm drives the brake device through the third connecting rod. When the first rocker arm swings, the first elongated hole can avoid the first hanging part to prevent the brake pedal on the left side of the frame from being linked. By providing a transmission mechanism, the steering gear assembly transmits the input rotational force to the first gear. The rotation of the first gear drives the ring gear and the second gear to rotate, so that the steering gear drives the steering device to steer the tractor. When the rotating frame is rotated, the position of the steering gear assembly relative to the frame also changes, and the first gear and the ring gear remain in a continuously meshed state. By providing a seat, releasing the second locking member allows the seat body to slide up and down. After adjusting to the appropriate position, the second locking member is inserted through the first and second sockets to lock the seat body to the fixed seat. By providing first locking members and pin holes, the rotating frame can be unlocked on the frame by pulling out a single or multiple first locking members from a single or multiple pin holes. After rotating the rotating frame, the rotating frame can be locked on the frame by inserting a single or multiple first locking members into the pin holes that match it up and down. After the tractor switches from forward to reverse motion, the rotating frame and seat ensure that the operator always faces the tractor's direction of travel. When turning leftward in reverse, the operator operates the steering gear assembly in the opposite direction to when turning forward. The same applies to right-hand turns. A reversing valve switches the steering gear's hydraulic transmission direction to the steering mechanism, allowing the operator to operate the steering gear assembly in reverse as when turning forward, facilitating ease of use. A lever, when reciprocating the rotating frame, contacts and actuates the reversing valve's handle, switching the reversing valve's state and, consequently, switching the steering gear's hydraulic transmission direction to the steering mechanism's direction. This facilitates operation and prevents the operator from forgetting to operate the reversing valve, improving safety.By setting screws, nuts and handles, the handle provides a convenient force point for screwing the nut, and the steering wheel moves closer to and away from the frame and seat by turning, which adapts to the heights of different operators and improves ease of use.

[0016] In summary, the utility model has the advantages of convenient use, reasonable structure, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a top view structural diagram of the frame, pedal assembly, rotating center sleeve, transmission mechanism and steering gear;

[0019] Figure 3 It is a structural diagram of the first rocker arm;

[0020] Figure 4 is a structural diagram of the first connecting rod;

[0021] Figure 5 is a structural diagram of the second connecting rod;

[0022] Figure 6 It is a structural diagram of the vehicle frame, clutch pedal and second parallel mechanism;

[0023] Figure 7 It is a structural diagram of the third rocker arm;

[0024] Figure 8 is a structural diagram of the fourth connecting rod;

[0025] Figure 9 is a structural diagram of the fifth connecting rod;

[0026] Figure 10 It is a structural diagram of the rotating frame, the rotating center sleeve, the first locking member, the shifting rod and the steering gear;

[0027] Figure 11 It is a structural diagram of the seat;

[0028] Figure 12 It is a schematic diagram of the hydraulic control of the steering gear, reversing valve and steering device;

[0029] Figure 13 It is a structural diagram of the steering wheel, the first mounting seat, the second mounting seat, the screws, the nuts and the handle;

[0030] In the figure: 1, vehicle frame; 11, rotating frame; 111, first locking member; 112, shift lever; 12, reversing valve; 2, rotating center sleeve; 3, accelerator pedal; 4, brake pedal; 5, clutch pedal; 6, first parallel mechanism; 61, first linkage shaft; 62, first rocker arm; 621, first hanging part; 622, second hanging part; 63, second rocker arm; 631, third connecting rod; 64, second linkage shaft; 65, third connecting shaft; 66, first linkage member; 67, first connecting rod; 671, first elongated hole; 68, second linkage member; 69, second connecting rod; 691, second elongated hole; 7, second parallel mechanism; 71, fourth Linking shaft; 72, third rocker arm; 721, third mounting part; 722, fourth mounting part; 73, fourth rocker arm; 731, sixth connecting rod; 74, fifth linkage shaft; 75, sixth linkage shaft; 76, third linkage member; 77, fourth connecting rod; 771, third elongated hole; 78, fourth linkage member; 79, fifth connecting rod; 791, fourth elongated hole; 8, transmission mechanism; 81, first gear; 82, ring gear; 83, second gear; 9, steering gear; 10, seat; 101, fixing seat; 1011, first socket; 102, seat body; 1021, second socket; 20, screw; 30, nut; 40, handle. DETAILED DESCRIPTION

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. For ease of understanding, Figure 1 The left side is the left side of the utility model, Figure 1 The right side is the right side of the utility model, Figure 1 The upper side is the upper side of the present invention, Figure 1 The lower side is the lower side of the utility model, from Figure 1 Left meridian Figure 1 Top to Figure 1 The right side rotates clockwise, from Figure 1 Right side meridian Figure 1 Top to Figure 1 The left side rotates counterclockwise.

[0032] Reference Figure 1 、 Figure 2This utility model includes a vehicle frame 1 equipped with a power unit, a brake unit, a steering system, and a clutch unit. The brake unit is well known to those skilled in the art and will not be described in detail here. For example, see Chinese Utility Model Patent No. CN219339421U, entitled "A Tractor Brake Operating Device." A single pedal drives the brake assembly via a rocker lever mechanism. The clutch unit is well known to those skilled in the art and will not be described in detail here. For example, see Chinese Utility Model Patent No. CN2821263Y, entitled "Tractor Clutch Operating Mechanism." A single pedal drives a clutch sleeve, thereby driving the clutch, via a rocker lever mechanism. The vehicle frame 1 is equipped with a rotating center sleeve 2. Two pedal assemblies are centrally symmetrically arranged on the left and right sides of the vehicle frame 1, centered around the rotating center sleeve 2. The pedal assemblies include an accelerator pedal 3, a brake pedal 4, and a clutch pedal 5, which are connected to the power unit. Both accelerator pedals 3 are connected to the engine ECU via a wiring harness. The vehicle frame 1 is equipped with a shift mechanism including a shift lever, which extends upward from the center of the rotating center sleeve 2.

[0033] Reference Figures 1 to 5 Both brake pedals 4 are connected to a first parallel mechanism 6 mounted on the vehicle frame 1. This allows one of the two brake pedals 4 to selectively actuate the brake device. The first parallel mechanism 6 comprises a first linkage shaft 61 hinged to the vehicle frame 1. The first linkage shaft 61 is fitted with a first rocker arm 62 and a second rocker arm 63. These rocker arms 62 and 63 are connected to the first linkage shaft 61 via a flat key. The first rocker arm 62 is provided with a first mounting portion 621 and a second mounting portion 622 at its upper and lower portions, respectively. The first mounting portion 621 and the second mounting portion 622 are cylindrical in shape. A second linkage shaft 64 and a third linkage shaft 65 are hinged to the vehicle frame 1, located on the left and right sides of the first rocker arm 62, respectively. The lower portion of the brake pedal 4 on the left side of the vehicle frame 1 is connected to a second linkage shaft 64, which is provided with a first linkage member 66. The first linkage member 66 and the first rocker arm 62 are driven by a first connecting rod 67. One end of the first connecting rod 67 is hinged to the upper portion of the first linkage member 66, and the other end is hinged to the first mounting portion 621 through a first elongated hole 671. The lower portion of the brake pedal 4 on the right side of the vehicle frame 1 is connected to a third linkage shaft 65. The third linkage shaft 65 is provided with a second linkage member 68. The second linkage member 68 and the first rocker arm 62 are driven by a second connecting rod 69. One end of the second connecting rod 69 is hinged to the upper portion of the second linkage member 68, and the other end is hinged to the second mounting portion 622 through a second elongated hole 691. The second rocker arm 63 is driven and connected to the brake device via a third connecting rod 631.

[0034] Reference Figure 1 、 Figure 2 、 Figure 5 and Figure 6When the brake pedal 4 on the left side of the vehicle frame 1 is depressed, the second linkage shaft 64 rotates counterclockwise. The first linkage member 66 rotates along with the second linkage shaft 64, thereby swinging counterclockwise about the axis of the second linkage shaft 64. The first linkage member 66 drives the first rocker arm 62 to swing counterclockwise about the axis of the first linkage shaft 61 via the first connecting rod 67. The swinging of the first rocker arm 62 rotates the first linkage shaft 61, causing the second rocker arm 63 to swing in the same direction as the first rocker arm 62. The second rocker arm 63 then actuates the brake device via the third connecting rod 631. When the first rocker arm 62 swings, the second elongated hole 691 clears the second mounting portion 622, thereby preventing the brake pedal 4 on the right side of the vehicle frame 1 from being engaged. When the brake pedal 4 on the right side of the vehicle frame 1 is depressed, the third linkage shaft 65 rotates clockwise, and the second linkage member 68 rotates along with the third linkage shaft 65, thereby swinging clockwise about the axis of the third linkage shaft 65. The second linkage member 68 drives the first rocker arm 62 to swing counterclockwise about the axis of the first linkage shaft 61 via the second connecting rod 69. The swinging of the first rocker arm 62 rotates the first linkage shaft 61, causing the second rocker arm 63 to swing in the same direction as the first rocker arm 62. The second rocker arm 63 then drives the brake device via the third connecting rod 631. When the first rocker arm 62 swings, the first elongated hole 671 avoids the first mounting portion 621, thereby preventing the brake pedal 4 on the left side of the vehicle frame 1 from being linked.

[0035] Reference Figure 2 and Figures 6 to 9Both clutch pedals 5 are connected to a second parallel mechanism 7 mounted on the vehicle frame 1. The two clutch pedals 5 can selectively drive the clutch device via the second parallel mechanism 7. The second parallel mechanism 7 includes a fourth linkage shaft 71 hinged to the vehicle frame 1. The fourth linkage shaft 71 is fitted with a third rocker arm 72 and a fourth rocker arm 73. These rocker arms 72 and 73 are connected to the fourth linkage shaft 71 via a flat key. The third rocker arm 72 has a third mounting portion 721 and a fourth mounting portion 722 at its upper and lower portions, respectively. The third mounting portion 721 and the fourth mounting portion 722 are cylindrical. A fifth linkage shaft 74 and a sixth linkage shaft 75 are hinged to the vehicle frame 1, located on the left and right sides of the third rocker arm 72, respectively. The lower portion of the clutch pedal 5 located on the left side of the vehicle frame 1 is connected to the fifth linkage shaft 74. The fifth linkage shaft 74 is provided with a third linkage member 76. The third linkage member 76 and the third rocker arm 72 are driven by a fourth connecting rod 77. One end of the fourth connecting rod 77 is hinged to the upper portion of the third linkage member 76, and the other end is hinged to the third mounting portion 721 through a third elongated hole 771. The lower portion of the clutch pedal 5 located on the right side of the vehicle frame 1 is connected to the sixth linkage shaft 75. The sixth linkage shaft 75 is provided with a fourth linkage member 78. The fourth linkage member 78 and the third rocker arm 72 are driven by a fifth connecting rod 79. One end of the fifth connecting rod 79 is hinged to the upper portion of the fourth linkage member 78, and the other end is hinged to the fourth mounting portion 722 through a fourth elongated hole 791. The fourth rocker arm 73 is driven and connected to the clutch device via a sixth connecting rod 731. The principle of second parallel mechanism 7 actuating the clutch device when clutch pedal 5 is depressed is similar to the principle of first parallel mechanism 6 actuating the brake device when brake pedal 4 is depressed, and will not be further described here. The first and second parallel mechanisms 6 and 7 mechanically control a set of brake devices and a set of clutch devices during forward and reverse travel of the tractor, reducing installation space and production costs compared to hydraulic clutch and brake control devices.

[0036] Reference Figure 1 and Figure 2The vehicle frame 1 is provided with a rotating frame 11 that can freely rotate around the axis of the rotating center sleeve 2. The rotating frame 11 can freely rotate around the axis of the rotating center sleeve 2 through a plane thrust bearing. After rotation, the rotating frame 11 can be locked on the vehicle frame 1 by a first locking member 111. The first locking member 111 is a cylindrical pin passing through the rotating frame 11. The vehicle frame 1 is provided with a plurality of pin holes that can accommodate the first locking member 111 after the rotating frame 11 is rotated. The rotating frame 11 is unlocked on the vehicle frame 1 by pulling out a single or multiple first locking members 111 from a single or multiple pin holes. After rotating the rotating frame 11, the rotating frame 11 is locked on the vehicle frame 1 by inserting a single or multiple first locking members 111 into the pin holes that match the rotating frame 11 above and below. The rotating frame 11 is equipped with a steering gear assembly. This steering gear assembly is driven and connected to a steering gear 9 mounted on the vehicle frame 1 via a transmission mechanism 8. The steering gear 9 is driven and connected to the steering system. The steering gear 9 is connected to a constant-flow pump mounted on the vehicle frame 1 via a pipeline. The vehicle frame 1 is equipped with a tank for storing hydraulic oil. The transmission mechanism 8 includes a first gear 81 at the output end of the steering gear assembly. A rotating center sleeve 2 is provided with a freely rotatable ring gear 82. The input end of the steering gear 9 is provided with a second gear 83 that meshes with the ring gear 82. The steering gear assembly transmits input rotational force to the first gear 81. The rotation of the first gear 81 drives the ring gear 82 and the second gear 83, thereby driving the steering system 9 to steer the tractor. In this embodiment, a hydraulic steering system is used. The structural principles of this system are well known to those skilled in the art and will not be further described here. As the rotating frame 11 rotates, the position of the steering gear assembly relative to the vehicle frame 1 also changes. The first gear 81 can maintain a continuous meshing state with the ring gear 82 during this change in position.

[0037] Reference Figure 1 、 Figures 10 to 12The frame 1 is provided with a reversing valve 12, and the steering gear 9 is connected to the steering device through the reversing valve 12. The steering gear 9 and the reversing valve 12 are hydraulically driven, and the reversing valve 12 and the steering device are hydraulically driven. The reversing valve 12 is a mechanical valve with a handle. In this embodiment, the reversing valve 12 is a manual two-position four-way valve. Its reversing principle for oil is the same as that of an electromagnetic two-position four-way valve. Please refer to the Chinese utility model patent entitled "A Forward and Reverse Driving Tractor" with the authorization announcement number CN216101674U, which will not be described in detail here. The rotating frame 11 is provided with a shifting rod 112, and the shifting rod 112 can shift the handle of the reversing valve 12 by rotating the rotating frame 11. There are two shifting rods 112 on the rotating frame 11, and the two shifting rods 112 are arranged symmetrically with the rotating center sleeve 2 as the center. The vehicle frame 1 is provided with a seat 10, which includes a fixed seat 101 mounted on a rotating frame 11. The fixed seat 101 is provided with a plurality of first sockets 1011 spaced apart vertically. The fixed seat 101 is slidably connected to a seat body 102, which is provided with a plurality of second sockets 1021. The seat body 102 is locked in position on the fixed seat 101 by a second locking member passing through the first sockets 1011 and the second sockets 1021. The second locking member can be a pin with a hole. Releasing the second locking member allows the seat body 102 to slide up and down. After adjusting to the appropriate position, the second locking member is passed through the first sockets 1011 and the second sockets 1021 to lock the seat body 102 on the fixed seat 101. After the tractor switches from forward to reverse travel, the rotating frame 11 and seat 10 allow the operator to always face the tractor's direction of travel. When the tractor is reversed, the operator operates the steering gear assembly in the opposite direction to the direction the operator operates the steering gear assembly when the tractor is reversed. The same applies to right turns. A reversing valve 12 is provided to switch the steering gear 9 toward the direction of hydraulic transmission of the steering mechanism, allowing the operator to operate the steering gear assembly in reverse travel in the same manner as when the tractor is forward, facilitating ease of use. A lever 112 is provided so that, when the rotating frame 11 is reciprocated, the lever 112 contacts and shifts the handle of the reversing valve 12, switching the state of the reversing valve 12 and thereby switching the direction of the steering gear 9 toward the direction of hydraulic transmission of the steering mechanism. This facilitates operation and prevents the operator from forgetting to operate the reversing valve 12, improving safety. Due to chassis limitations, most traditional tractors are designed with large rear tires and small front tires. Affected by the wheelbase and track, the operator's operating space is relatively narrow. The utility model realizes the two-way driving function on traditional tractors with narrow operating space.

[0038] Reference Figure 1 and Figure 13The steering gear assembly includes a steering wheel as an input end. A first mounting seat is provided on the vehicle frame 1, a second mounting seat is provided above the first mounting seat, and the steering wheel is mounted on the second mounting seat. The steering wheel transmits rotational force to the output end of the steering gear assembly via a rotational transmission assembly provided on the first and second mounting seats. The vertical distance between the steering wheel and the vehicle frame 1 and the horizontal distance between the steering wheel and the seat 10 are adjustable. Specifically, the second mounting seat is hinged to the first mounting seat via a screw 20. The screw 20 is threadedly engaged with a nut 30 that abuts the outer surface of the first mounting seat. The nut 30 is provided with a handle 40. The rotational transmission assembly can optionally utilize a dual shaft and universal joint combination. A cylindrical shaft can be selected as the output end of the steering gear assembly. The output end of the steering gear assembly is located below the first mounting seat and can be connected to the rotational transmission assembly via a coupling. Specifically, the steering wheel is connected to one shaft of the dual shaft and universal joint combination. The other shaft of the dual shaft and universal joint combination is connected to the output end of the steering gear assembly via a coupling. The universal joint transmits power to both shafts of the dual shaft and universal joint combination. The handle 40 provides a convenient force point for screwing the nut 30 , and the steering wheel moves closer to and away from the frame 1 and the seat 10 in a rotating manner, which adapts to the heights of different operators and improves ease of use.

[0039] When the present invention is used, the two pedal assemblies can adapt to the operator's pedaling habits during forward and reverse travel. When the brake device needs to be activated during forward and reverse travel, the first parallel mechanism 6 is used to independently activate the brake device after one brake pedal 4 is depressed, preventing the other brake pedal 4 from being activated after one brake pedal 4 is depressed. When the clutch device needs to be activated during forward and reverse travel, the second parallel mechanism 7 is used to independently activate the clutch device after one clutch pedal 5 is depressed, preventing the other clutch pedal 5 from being activated after one clutch pedal 5 is depressed, thereby improving operational safety. Before moving forward or backward, the posture of the seat 10 needs to be adjusted by rotating the rotating frame 11 so that the operator can face the direction of travel after sitting on the seat 10. First, the vehicle is stopped and the first locking member 111 is released. The rotating frame 11 is then manually pushed to rotate around the axis of the rotating center sleeve 2. As the rotating frame 11 rotates, the posture of the seat 10 changes. After the adjustment is completed, the rotating frame 11 is locked to the frame 1 via the first locking member 111 to prevent it from rotating randomly. When steering is required, the operator inputs the rotational force into the steering gear assembly through the transmission mechanism 8 and transmits it to the steering gear 9 , which drives the steering device through the reversing valve 12 to perform steering.

[0040] The above content is merely an example and explanation of the structure of the utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the scope of protection of the utility model.

Claims

1. A two-way traveling tractor, comprising a frame (1), wherein the frame (1) is provided with a power device, a brake device, a steering device and a clutch device, and the frame (1) is provided with a rotating center sleeve (2), characterized in that: The vehicle frame (1) is provided with two sets of pedal assemblies, which are centrally symmetrically arranged on the left and right sides of the vehicle frame (1) with the rotating center sleeve (2) as the center. The pedal assembly includes an accelerator pedal (3), a brake pedal (4), and a clutch pedal (5) which are controlled and connected to the power device. The two brake pedals (4) are both connected to a first parallel mechanism (6) provided on the vehicle frame (1). The two brake pedals (4) can selectively drive the brake device through the first parallel mechanism (6). The two clutch pedals (5) are both connected to a second parallel mechanism (7) provided on the vehicle frame (1). Two clutch pedals (5) can selectively drive a clutch device through a second parallel mechanism (7). The vehicle frame (1) is provided with a rotating frame (11) that can freely rotate around the axis of a rotating center sleeve (2). The rotating frame (11) can be locked on the vehicle frame (1) through a first locking member (111) after rotation. The rotating frame (11) is provided with a steering gear assembly. The steering gear assembly is driven and connected to a steering gear (9) provided on the vehicle frame (1) through a transmission mechanism (8). The steering gear (9) is driven and connected to the steering device. The vehicle frame (1) is provided with a seat (10).

2. The two-way traveling tractor according to claim 1, characterized in that: The first parallel mechanism (6) includes a first linkage shaft (61) hinged on the vehicle frame (1), the first linkage shaft (61) is provided with a first rocker arm (62) and a second rocker arm (63), the upper and lower parts of the first rocker arm (62) are provided with a first hanging part (621) and a second hanging part (622), respectively, the vehicle frame (1) is hinged with a second linkage shaft (64) and a third linkage shaft (65) respectively located on the left and right sides of the first rocker arm (62), the lower part of the brake pedal (4) located on the left side of the vehicle frame (1) is connected to the second linkage shaft (64), the second linkage shaft (64) is provided with a first linkage member (66), the first linkage member (66) and the first rocker arm (62) are connected via a first connecting rod (67) The first link (67) is hinged at one end to the upper part of the first linkage member (66) and the other end is hinged to the first hanging part (621) through the first long hole (671). The lower part of the brake pedal (4) located on the right side of the frame (1) is connected to the third linkage shaft (65). The third linkage shaft (65) is provided with a second linkage member (68). The second linkage member (68) and the first rocker arm (62) are driven by the second link (69). The second link (69) has one end hinged to the upper part of the second linkage member (68) and the other end hinged to the second hanging part (622) through the second long hole (691). The second rocker arm (63) is driven and connected to the brake device through the third link (631).

3. The two-way traveling tractor according to claim 1, characterized in that: The second parallel mechanism (7) includes a fourth linkage shaft (71) hinged on the vehicle frame (1), the fourth linkage shaft (71) is provided with a third rocker arm (72) and a fourth rocker arm (73), the upper and lower parts of the third rocker arm (72) are provided with a third hanging part (721) and a fourth hanging part (722), respectively, the vehicle frame (1) is hinged with a fifth linkage shaft (74) and a sixth linkage shaft (75) respectively located on the left and right sides of the third rocker arm (72), the lower part of the clutch pedal (5) located on the left side of the vehicle frame (1) is connected to the fifth linkage shaft (74), the fifth linkage shaft (74) is provided with a third linkage member (76), the third linkage member (76) and the third rocker arm (72) are connected via a fourth connecting rod (77). The fourth link (77) is hinged at one end to the upper part of the third linkage member (76) and the other end is hinged to the third hanging part (721) through the third long hole (771). The lower part of the clutch pedal (5) located on the right side of the frame (1) is connected to the sixth linkage shaft (75). The sixth linkage shaft (75) is provided with a fourth linkage member (78). The fourth linkage member (78) and the third rocker arm (72) are driven by a fifth link (79). The fifth link (79) is hinged at one end to the upper part of the fourth linkage member (78) and the other end is hinged to the fourth hanging part (722) through the fourth long hole (791). The fourth rocker arm (73) is driven and connected to the clutch device through the sixth link (731).

4. The two-way traveling tractor according to claim 1, characterized in that: The transmission mechanism (8) includes a first gear (81) provided at the output end of the steering gear assembly, the rotating center sleeve (2) is provided with a freely rotatable ring gear (82), and the input end of the steering gear (9) is provided with a second gear (83) meshing with the ring gear (82).

5. The two-way traveling tractor according to claim 1, characterized in that: The seat (10) includes a fixed seat (101) arranged on a rotating frame (11), the fixed seat (101) is provided with a plurality of first plug holes (1011) spaced apart from each other, the fixed seat (101) is slidably connected to a seat body (102), the seat body (102) is provided with a plurality of second plug holes (1021), and the seat body (102) is locked in position on the fixed seat (101) by passing through a second locking member in the first plug holes (1011) and the second plug holes (1021).

6. The two-way traveling tractor according to claim 1, characterized in that: The first locking member (111) is a cylindrical pin passing through the rotating frame (11), and the vehicle frame (1) is provided with a plurality of pin holes capable of accommodating the first locking member (111) after the rotating frame (11) is rotated.

7. The bidirectional tractor according to any one of claims 1 to 6, characterized in that: The vehicle frame (1) is provided with a reversing valve (12), the steering gear (9) is connected to the steering device via the reversing valve (12), the steering gear (9) and the reversing valve (12) are hydraulically driven, and the reversing valve (12) and the steering device are hydraulically driven.

8. The two-way traveling tractor according to claim 7, characterized in that: The reversing valve (12) is a mechanical valve with a handle, and the rotating frame (11) is provided with a shifting rod (112). The shifting rod (112) can shift the handle of the reversing valve (12) by rotating the rotating frame (11).

9. The two-way traveling tractor according to claim 4, characterized in that: The steering gear assembly includes a steering wheel as an input end, the vehicle frame (1) is provided with a first mounting seat, a second mounting seat is provided on the upper portion of the first mounting seat, the steering wheel is arranged on the second mounting seat, the steering wheel transmits the rotational force to the output end of the steering gear assembly through a rotation transmission assembly provided on the first mounting seat and the second mounting seat, and the vertical distance from the steering wheel to the vehicle frame (1) and the horizontal distance from the steering wheel to the seat (10) can be adjusted.

10. The two-way traveling tractor according to claim 9, characterized in that: The second mounting seat is hinged to the first mounting seat via a screw (20), the screw (20) being threaded with a nut (30) abutting against the outer side of the first mounting seat, and the nut (30) being provided with a handle (40).

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