Bidirectional control mechanism of tractor

Abstract

The utility model discloses a bidirectional control mechanism of a tractor, which comprises a gearbox body connected on a tractor frame, a short-rod type main gear shift lever and a long-rod type gear shift lever are arranged on a front cover of the gearbox body, and a hydraulic steering oil cylinder and a hydraulic steering machine used for controlling the hydraulic steering oil cylinder are arranged on the tractor frame. A reversing control rod connected with the hydraulic steering machine is arranged on the gearbox body, a front seat is connected to the top face of the rear portion of the gearbox, a rear seat is connected to the top face of the front portion or the middle of the tractor frame, and the front seat and the rear seat are both folding seats with foldable backrests. A forward or backward clutch and brake control mechanism is correspondingly arranged on the tractor frame or the lower side of the rear portion of the clutch shell, and the hydraulic steering machine is connected with an oil inlet / outlet of the hydraulic steering oil cylinder through a quick hydraulic connector. The steering device is simple in structure, convenient to reverse and capable of being well suitable for the arrangement of a small and medium-sized two-way driving tractor driving seat with narrow short axle wheel tread.

Description

Technical Field

[0001] The utility model relates to a tractor, in particular to a two-way control mechanism of the tractor. Background Art

[0002] Some existing two-way tractors that travel on the road have seats that rotate 180 degrees to achieve forward and backward direction switching, with hydraulic steering gears independently mounted at the front and rear ends of the seat to achieve bidirectional travel. Other two-way tractors have seats and hydraulic steering gears mounted on a swivel seat, which rotates 180 degrees to achieve forward and backward direction switching, achieving bidirectional travel. Both of these two types of tractors suffer from complex structures, high manufacturing costs, and large space requirements, making them suitable only for large tractors and unsuitable for smaller tractors with narrow, short wheelbases. This is especially true for short periods of forward and backward travel, such as snow clearing in northern winter, when the tractor has different sets of agricultural implements on its front and rear, requiring careful observation. Using a reverse travel mechanism is inefficient and unsafe. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a two-way control mechanism for a tractor which has a simple structure and convenient reversing.

[0004] In order to solve the above technical problems, the utility model provides a two-way control mechanism for a tractor, which includes a gearbox body connected to the tractor frame, a short-rod main gear lever and a long-rod gear lever installed on the front cover of the gearbox body, a hydraulic steering cylinder and a hydraulic steering machine for controlling the hydraulic steering cylinder installed on the tractor frame, and a reversing joystick connected to the hydraulic steering machine on the gearbox body. Its structural characteristics are: a front seat is connected to the top surface of the rear of the gearbox, and a rear seat is connected to the front or middle top surface of the tractor frame, and both the front seat and the rear seat are folding seats with foldable backrests; a forward or backward clutch and brake operating mechanism is correspondingly provided on the lower side of the rear of the tractor frame or the clutch housing, and the hydraulic steering machine is connected to the inlet / outlet oil port of the hydraulic steering cylinder via a quick hydraulic joint.

[0005] The short-rod type main shift lever is located at the rear of the hydraulic steering gear, and the upper portion of the long-rod type shift lever is bent and biased toward the left side of the gearbox.

[0006] The clutch and brake operating mechanism includes a linkage shaft installed under the tractor frame or the rear end of the clutch housing, a linkage shaft sleeve is mounted on the linkage shaft and the linkage shaft and the linkage shaft sleeve are rotatably matched, the two ends of the linkage shaft sleeve are respectively fixedly connected to the linkage sleeve seat, and the two ends of the linkage shaft are respectively fixedly connected to the linkage shaft seat beam, and the clutch push rod and the brake push rod are respectively installed on the linkage shaft seat beam and the linkage sleeve seat on the same side, and the clutch push rod and the brake push rod on the linkage shaft seat beam and the linkage sleeve seat on the opposite side are a set, and the clutch pedal welded and the brake pedal welded can be selectively connected to a set of clutch push rod and brake push rod.

[0007] With this structure, the forward and reverse clutch and brake operating mechanisms are located on the lower rear side of the clutch housing or frame, or on the lower side where the clutch housing or frame connects to the transmission. The hydraulic steering gear and the hydraulic steering cylinder's oil inlet and outlet are connected via quick-acting hydraulic connectors. This simple structure and convenient reversing make it ideally suited to the cab layout and performance requirements of small and medium-sized, narrow, short-wheelbase, two-way tractors. Furthermore, it offers low manufacturing costs and a wide range of applications. The shift and reversing levers utilize a short-bar main shift and reversing lever and a secondary shift lever. The upper portion of the short-bar main shift and reversing lever is curved and offset to the left of the transmission, providing standardized and versatile operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings:

[0009] Figure 1 This is a structural diagram of an embodiment of the utility model;

[0010] Figure 2 for Figure 1 The clutch and brake operating mechanism in one of the use states;

[0011] Figure 3 for Figure 1 The clutch and brake operating mechanism in another state of use;

[0012] Figure 4 for Figure 1 Schematic diagram of the structure of the center clutch pedal welded and connected to the linkage shaft;

[0013] Figure 5 for Figure 1 Schematic diagram of the structure of the middle brake pedal welded and connected to the linkage shaft. DETAILED DESCRIPTION

[0014] See attached figure, Figure 1An embodiment of the present invention is given in the specification. The two-way control mechanism of the tractor includes a gearbox body 4 connected to the tractor frame 1. The front cover of the gearbox body 4 is equipped with a short-bar main gear lever 8 and a long-bar gear lever 9. The lower part of the tractor frame 1 or the clutch housing 2 is provided with a lug 21. The tractor frame 1 is equipped with a hydraulic steering cylinder 13 and a hydraulic steering machine 10 for controlling the hydraulic steering cylinder 13. The gearbox body 2 is provided with a reversing joystick connected to the hydraulic steering machine 10. The front part of the clutch housing or the frame 2 is provided with a front wheel axle 1. The front wheel axle 1 is equipped with a diesel engine 12 and a hydraulic steering cylinder 13. The hydraulic steering cylinder 13 has a relative oil inlet E and an oil outlet. The rear portion of the transmission 4 is mounted on the rear wheel axle 5. A hydraulic steering gear 10 is located above the connection between the clutch housing or frame 2 and the transmission 4. The hydraulic steering gear 10 has an oil pump inlet A and an oil pump outlet B connected to the inlet and outlet ports of the hydraulic oil pump on the diesel engine 12. The transmission 4 is equipped with a shift and reversing lever, which includes a short-bar main shift and reversing lever 9 and a secondary shift lever 8. The short-bar main shift and reversing lever 9 is located at the rear of the hydraulic steering gear 10. The upper portion of the short-bar main shift and reversing lever 9 is curved and offset to the left of the transmission 4. This structure is common in existing tractors, and the structure and positional arrangement of each component are well-known. A front seat 6 is connected to the rear top surface of the transmission 2, and a rear seat 11 is connected to the front or middle top surface of the frame 2. Both the front seat 6 and the rear seat 11 are folding seats with foldable backrests. In this embodiment, the hydraulic steering gear 10 is provided with a cylinder oil inlet C and a cylinder oil outlet D, which are arranged corresponding to the oil inlet E and oil outlet F of the hydraulic steering cylinder 13. The front-to-rear oil circuits between the oil inlet E and oil outlet F and the cylinder oil inlet C and cylinder oil outlet D are connected by a quick hydraulic joint. That is, when the tractor is moving forward, the front-to-rear oil circuits between the oil inlet E and the cylinder oil inlet C are connected by the quick hydraulic joint, and the front-to-rear oil circuits between the oil outlet F and the cylinder oil outlet D are connected by the quick hydraulic joint. When the tractor is moving backward and forward, the front-to-rear oil circuits between the oil inlet E and the cylinder oil outlet D are connected by the quick hydraulic joint, and the front-to-rear oil circuits between the oil outlet F and the cylinder oil inlet C are connected by the quick hydraulic joint. This meets the requirements of the tractor's bidirectional steering operation. The switching between the hydraulic steering gear 10 and the inlet / outlet of the hydraulic oil pump on the diesel engine 12 and the inlet / outlet of the hydraulic steering cylinder 13 is a routine operation known to those skilled in the art.

[0015] Referring to the accompanying drawings, a clutch and brake operating mechanism for moving forward or backward is correspondingly provided on the lower rear side of the tractor frame 1 or the clutch housing 2. The clutch and brake operating mechanism can also be provided on the lower side of the connection portion between the clutch housing 2 and the gearbox 4. The clutch and brake operating mechanism includes a linkage shaft 15 installed below the rear end of the clutch housing 2. The mounting structure is a conventional operation of existing technicians. The linkage shaft 15 can also be provided below the connection portion between the clutch housing or the frame 2 and the gearbox 4. Specifically, a through hole is provided on the lower channel steel of the frame, and the linkage shaft 15 can be installed in the through hole, or a lug 21 is provided on the lower part of the clutch housing 2, and a through hole is provided on the lug 21, and the linkage shaft 15 is installed in the above-mentioned through hole. A linkage shaft sleeve 27 is provided on the linkage shaft 15, and the linkage shaft 15 and the linkage shaft sleeve 27 can rotate with each other. The linkage shaft 15 is provided with a linkage shaft sleeve 27 and the linkage shaft 15 rotates with the linkage shaft sleeve 27. Both ends of the linkage shaft sleeve 27 are fixedly connected to a linkage sleeve seat 19, and the two ends of the linkage shaft 15 are fixedly connected to a linkage shaft seat beam 14, and the linkage shaft seat beam 14 and the linkage shaft 15 are fixed by a pin 16. The linkage shaft seat beam 14 and the linkage sleeve seat 19 on the same side are respectively equipped with a clutch push rod 22 and a brake push rod 25. The clutch push rod 22 and the brake push rod 25 on the linkage shaft seat beam 14 and the linkage sleeve seat 19 on the opposite side are a set. The clutch pedal weld 23 and the brake pedal weld 24 can be selectively connected to a set of clutch push rod 22 and brake push rod 25, that is, when the tractor moves forward, the wheel 5 moves forward (toward Figure 1 Walking on the right side), the clutch pedal welding 23 is inserted into the linkage shaft seat beam 14 on the left side, refer to Figure 2 and Figure 4 In the state, when the tractor moves forward, the wheel 50 moves forward (toward Figure 1 Walking on the left side), the clutch pedal welding 23 is inserted into the linkage shaft seat beam 14 on the right side, refer to Figure 3The linkage shaft sleeve 27 is provided with a linkage sleeve seat 19 at both ends, and the linkage sleeve seat 19 and the linkage shaft sleeve 27 are fixed by a key 17. A positioning bolt 18 is also provided between the linkage sleeve seat 19 and the linkage shaft sleeve 27. The linkage sleeve seat 19 is connected to the brake pedal weld 24 via the brake rod 25, that is, when the tractor moves forward, the brake pedal weld 24 is inserted into the linkage sleeve seat 19 on the right side, and when the tractor moves backward and forward, the brake pedal weld 24 is inserted into the linkage sleeve seat 19 on the left side. A spacer 20 is also provided on the linkage shaft sleeve 27 between the linkage sleeve seat 19 and the clutch housing or the side wall of the frame 2. During actual production, the top of the linkage shaft seat beam 14 and the linkage sleeve seat 19 are slightly higher than the top surface of the foot pedal. The linkage shaft seat beam 14 and the linkage sleeve seat 19 are used to connect with the clutch pedal weld 23 and the brake pedal weld 24. The insertion sections can be made of round tubes or square tubes. The clutch pedal weld 23 and the brake pedal weld 24 are also made of round tubes or square tubes. The clutch pedal weld 23 and the brake pedal weld 24 can be fixed to the linkage shaft seat beam 14 and the linkage sleeve seat 19 respectively by fastening bolts 28.

[0016] Referring to the accompanying drawings, in the embodiment shown in the drawings, the aforementioned linkage shaft utilizes two types of prior art products. The aforementioned linkage shaft can be correspondingly disposed in the holes of the clutch housing 2 or the tractor frame 1 of the two types of products, thereby improving the tractor to be equipped with a two-way control mechanism. A hydraulic quick connector modified with a quick-change oil solution solves the problem of steering the steering wheel in the same direction as the forward and backward travel of the tractor. The seat can be a single seat or a seat with a foldable backrest as required. Depending on the structural layout requirements of different models, the two linkage shaft seat beams 14 can be located on the opposite inner sides of the two linkage sleeve seats 19. The clutch pedal weld 23 and the brake pedal weld 24 are correspondingly inserted into the linkage shaft seat beam 14 and the linkage sleeve seat 19. The connection positions of the connection components associated with the clutch or brake can be modified accordingly. All of these changes fall within the scope of protection of the present utility model.

Claims

1. A two-way control mechanism for a tractor, comprising a transmission case (4) connected to a tractor frame (1), a short-bar type main gear lever (8) and a long-bar type gear lever (9) being mounted on a front cover of the transmission case (4), a lug (21) being provided at the lower portion of the tractor frame (1) or a clutch housing (2), a hydraulic steering cylinder (13) and a hydraulic steering machine (10) for operating the hydraulic steering cylinder (13) being mounted on the tractor frame (1), a reversing joystick connected to the hydraulic steering machine (10) being provided on the transmission case (4), and characterized in that: The top surface of the rear portion of the gearbox body (4) is connected to a forward seat (6), and the top surface of the front or middle portion of the tractor frame (1) is connected to a rear seat (11). Both the forward seat (6) and the rear seat (11) are foldable seats with foldable backrests. A forward or backward clutch and brake operating mechanism is correspondingly provided on the lower side of the rear portion of the tractor frame (1) or the clutch housing (2). The hydraulic steering gear (10) is connected to the oil inlet / outlet of the hydraulic steering cylinder (13) via a quick hydraulic joint.

2. The bidirectional control mechanism of the tractor according to claim 1, characterized in that: The short-rod type main shift lever (8) is located at the rear of the hydraulic steering gear (10), and the upper portion of the long-rod type shift lever (9) is bent and deviates to the left side of the transmission case (4).

3. The bidirectional control mechanism of the tractor according to claim 1, characterized in that: The clutch and brake operating mechanism comprises a linkage shaft (15) mounted below the rear end of a tractor frame (1) or a clutch housing (2); a linkage shaft sleeve (27) is sleeved on the linkage shaft (15) and the linkage shaft (15) and the linkage shaft sleeve (27) are rotatably matched; both ends of the linkage shaft sleeve (27) are respectively fixedly connected to a linkage sleeve seat (19); both ends of the linkage shaft (15) are respectively fixedly connected to a linkage shaft seat beam (14); a clutch push rod (22) and a brake push rod (25) are respectively mounted on the linkage shaft seat beam (14) and the linkage sleeve seat (19) on the same side; the clutch push rod (22) and the brake push rod (25) on the linkage shaft seat beam (14) and the linkage sleeve seat (19) on the opposite side form a set; a clutch pedal weld (23) and a brake pedal weld (24) are selectively connected to a set of clutch push rod (22) and brake push rod (25).

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