Power transmission device of four-wheel drive tractor

Abstract

The utility model discloses a power transmission device of a four-wheel drive tractor, which relates to the technical field of agricultural machinery and comprises a supporting shell, an adjusting mechanism is arranged on the front side of the supporting shell, a diesel engine is mounted at the upper end of the front side of the supporting shell, and the adjusting mechanism is used for adjusting the mounting position of the diesel engine. The adjusting mechanism comprises a first lead screw in bearing connection with the front side of the upper portion of the supporting shell, a transverse plate is in threaded connection with the outer surface of the first lead screw, a second lead screw is in bearing connection with the middle of the upper end of the transverse plate, a mounting box is in threaded connection with the outer surface of the second lead screw, and sliding grooves are formed in the left end and the right end of the inner side of the mounting box. According to the power transmission device of the four-wheel-drive tractor, the first lead screw, the second lead screw and the third lead screw are rotated respectively, so that the position of the diesel engine is adjusted up and down, left and right, and front and back; and the triangular conveying belt group between the diesel engine belt pulley and the gearbox can be conveniently adjusted during integral assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a power transmission device of a four-wheel drive tractor. Background Art

[0002] In the process of agricultural operations, the use of tractors can effectively improve work efficiency. A tractor is mainly a mobile power-providing machine. By driving the tractor with the corresponding power transmission device and matching it with different agricultural implements, various farmland operations and transportation operations can be realized. The flexibility of the tractor is an important indicator for evaluating the performance of the tractor. The better the transmission capacity of the tractor and the stronger its ability to adapt to the environment, the higher the work efficiency will be.

[0003] The patent document with application number CN202221914482.8 discloses a mountain tractor. The mountain tractor includes a first body and a second body, and the first body and the second body are hinged; the mountain tractor also includes a rotating component for driving the first body to rotate relative to the second body; wherein the rotating component includes a first rotating arm, a second rotating arm and a third rotating arm, the first rotating arm is rotatably connected to the first body, the first rotating arm, the second rotating arm and the third rotating arm are connected in sequence, the first rotating arm and the second rotating arm are connected through a first universal joint, the second rotating arm and the third rotating arm are connected through a second universal joint, and the third rotating arm is connected to the hinge node of the first body and the second body. The mountain tractor of this application has the advantages of small turning radius and flexible turning.

[0004] Compared with the above documents, although the tractor's turning radius and turning flexibility are improved, during the installation of the diesel engine, due to the different sizes of the diesel engines, fixed installation positions, and fixed gearbox installation, the V-belt connecting the diesel engine and the gearbox is prone to mismatch. Utility Model Content

[0005] The utility model discloses a power transmission device for a four-wheel drive tractor. During the installation of a diesel engine, due to the different sizes of the diesel engines, fixed installation positions and fixed gearbox installation, a technical problem of mismatching easily occurs in the V-belts connecting the diesel engine and the gearbox.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A power transmission device for a four-wheel drive tractor comprises a supporting shell, an adjusting mechanism is arranged on the front side of the supporting shell, a diesel engine is installed on the upper end of the front side of the supporting shell, the adjusting mechanism is used to adjust the installation position of the diesel engine, the adjusting mechanism comprises a first screw rod connected by a bearing to the upper front side of the supporting shell, a cross plate is threadedly connected to the outer surface of the first screw rod, a second screw rod is connected to a mounting box by a bearing at the middle part of the upper end of the cross plate, a mounting box is threadedly connected to the outer surface of the second screw rod, slide grooves are provided at the left and right ends of the inner side of the mounting box, a supporting plate is slidably connected to the inside of the slide groove, a third screw rod is threadedly connected to the right side of the supporting plate, a driving mechanism is arranged at the lower end of the supporting shell, the driving mechanism is used to drive the front and rear tires to move synchronously, a limiting mechanism is arranged at the front end of the supporting shell, and the limiting mechanism is used to limit the action of the adjusting mechanism.

[0008] In a preferred embodiment, the driving mechanism includes a gearbox connected to the rear side of the lower end of the V-conveyor belt group, the rear side of the gearbox is connected to a transfer case, the lower ends of the front and rear sides of the transfer case are connected to a transmission shaft, the end of the transmission shaft away from the transfer case is connected to a bridge assembly, and tire groups are installed on the front and rear sides below the support shell, and the two groups of tire groups are synchronously driven through the bridge assembly, the transmission shaft and the transfer case.

[0009] By setting up a transfer case to transmit power from the drive shaft to the bridge assembly, the front and rear tire groups of the tractor are driven synchronously, thereby achieving the effect of a four-wheel drive transmission of the tractor, thereby improving the performance and safety of the tractor in adverse road conditions and weather conditions.

[0010] In a preferred embodiment, the limiting mechanism includes a groove opened on the front side of the first screw rod, a sliding rod is slidably connected inside the groove, limiting holes are equidistantly opened at the right end of the front side of the support shell, a limiting block is slidably connected to the upper end of the sliding rod, a spring is connected to the lower end of the limiting block, the limiting block is semicircular, a knob is connected to the front side of the sliding rod, and a limiting rod is connected to the upper end of the rear side of the knob, and the limiting rod is consistent with the size of the limiting hole.

[0011] The limit rod is engaged with the limit hole to fix the direction of the knob and prevent it from rotating, so that the first screw rod cannot rotate, thereby preventing the first screw rod from rotating during the use of the tractor. At the same time, a limit block is provided to facilitate the sliding rod to be engaged and fixed in the groove, thereby ensuring that the limit rod is stably in the limit hole.

[0012] The utility model provides a power transmission device for a four-wheel drive tractor, which has the following improvements and advantages:

[0013] One: A power transmission device for a four-wheel drive tractor, which adjusts the position of a diesel engine up, down, left, right, front, and back by rotating a first screw rod, a second screw rod, and a third screw rod respectively. By adjusting the position of the diesel engine, it is convenient to adjust the V-belt group between the diesel engine pulley and the gearbox during overall assembly.

[0014] Second: A power transmission device for a four-wheel drive tractor, which transmits power from the drive shaft to the bridge assembly by setting a transfer case, promotes the synchronous transmission of the front and rear tire groups of the tractor, thereby achieving the effect of a four-wheel drive transmission of the tractor, thereby improving the performance and safety of the tractor under adverse road conditions and weather conditions.

[0015] Third: A power transmission device for a four-wheel drive tractor, in which a limit rod is engaged with the inside of a limit hole, so that the direction of a knob is fixed and cannot be rotated, and the first screw rod cannot be rotated, thereby preventing the first screw rod from rotating and the position of the diesel engine from changing during the use of the tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the main structure of a power transmission device of a four-wheel drive tractor.

[0017] Figure 2 The utility model is a schematic diagram of a top view of the power transmission device of a four-wheel drive tractor.

[0018] Figure 3 This is a partial view of the support shell structure of a power transmission device of a four-wheel drive tractor proposed by the utility model.

[0019] Figure 4 The utility model is a schematic diagram of the installation box structure of a power transmission device of a four-wheel drive tractor.

[0020] Figure 5 The utility model discloses a schematic diagram of a sliding rod structure of a power transmission device of a four-wheel drive tractor.

[0021] In the attached figure: 1. support shell; 2. first screw rod; 3. cross plate; 4. second screw rod; 5. mounting box; 6. slide groove; 7. support plate; 8. third screw rod; 9. transmission shaft; 10. diesel engine; 11. V-conveyor belt set; 12. tire set; 13. gearbox; 14. bridge assembly; 15. transfer case; 16. limit rod; 17. limit hole; 18. groove; 19. slide rod; 20. spring; 21. limit block; 22. knob. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] The utility model discloses a power transmission device for a four-wheel drive tractor, which is mainly used in the installation process of a diesel engine. Since the diesel engines are of different sizes, the installation positions are fixed, and the gearboxes are installed fixedly, the V-belts connecting the diesel engines and the gearboxes are prone to mismatch.

[0025] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A power transmission device for a four-wheel drive tractor comprises a supporting shell 1, an adjusting mechanism is arranged on the front side of the supporting shell 1, a diesel engine 10 is installed on the upper end of the front side of the supporting shell 1, the adjusting mechanism is used to adjust the installation position of the diesel engine 10, the adjusting mechanism comprises a first screw rod 2 connected to the front side of the upper part of the supporting shell 1 by a bearing, a cross plate 3 is threadedly connected to the outer surface of the first screw rod 2, a second screw rod 4 is threadedly connected to the middle part of the upper end of the cross plate 3 by a bearing, a mounting box 5 is threadedly connected to the outer surface of the second screw rod 4, a slide groove 6 is provided at the left and right ends of the inner side of the mounting box 5, a supporting plate 7 is slidably connected inside the slide groove 6, a third screw rod 8 is threadedly connected to the right side of the supporting plate 7, the diesel engine 10 is fixedly connected to the upper end of the supporting plate 7, a V-belt conveyor group 11 is connected to the rear side of the diesel engine 10, and the driving mechanism comprises a gearbox 13 connected to the rear side of the lower end of the V-belt conveyor group 11.

[0026] In this embodiment: after the diesel engine 10 is installed, it is necessary to install the V-belt group 11 connected between the diesel engine 10 and the gearbox 13, so as to achieve the transmission effect. Since the gearbox 13 is installed in a fixed position and the diesel engine 10 has different sizes and shapes, it is not easy to adjust the installation of the V-belt group 11. At that time, the position of the pulley of the diesel engine 10 and the pulley of the gearbox 13 will be observed according to the actual situation, so as to drive the diesel engine 10 installed on the installation box 5 to adjust the front and rear position by rotating the first screw rod 2 transmission cross plate 3. After the position is adjusted, the second screw rod 4 is rotated to prompt the diesel engine 10 on the installation box 5 to move left and right, thereby ensuring that the pulley of the diesel engine 10 and the pulley of the gearbox 13 are aligned. The positions are aligned up and down. The aligned pulleys are to ensure that the V-belt group 11 can be installed or remain in a tensioned state after installation. At this time, the third screw rod 8 is rotated to cause the support plate 7 to move up and down in the slide groove 6, so that the diesel engine 10 installed on the support plate 7 can be adjusted up and down. By adjusting the up and down positions of the diesel engine 10, the distance between the pulley of the diesel engine 10 and the pulley of the gearbox 13 is adjusted to the optimal position, and then the V-belt group 11 is installed between the pulleys. By rotating the third screw rod 8, the V-belt group 11 installed on the pulley is adjusted to a tensioned state, thereby facilitating the installation and adjustment of the V-belt group 11 by adjusting the up, down, left, right, front and back positions of the diesel engine 10.

[0027] Reference Figure 1 and Figure 2 In a preferred embodiment, a driving mechanism is provided at the lower end of the support shell 1, and the driving mechanism is used to drive the front and rear tires to move synchronously. The rear side of the gearbox 13 is connected to the transfer case 15, and the lower ends of the front and rear sides of the transfer case 15 are connected to the drive shaft 9. The end of the drive shaft 9 away from the transfer case 15 is connected to the bridge assembly 14, and the tire groups 12 are installed on the front and rear sides below the support shell 1. The two sets of tire groups 12 are driven synchronously through the bridge assembly 14, the drive shaft 9, and the transfer case 15.

[0028] After the diesel engine 10 and the gearbox 13 are connected through the V-belt group 11 in the above description, when the tractor is running, the gearbox 13 is transmitted to the transfer case 15 by starting the diesel engine 10, and the transfer case 15 transmits the power to the front and rear tire groups 12 on the bridge assembly 14 through the front and rear drive shafts 9 respectively. The bridge assembly 14 synchronously drives the front and rear tire groups 12 to rotate, thereby realizing the four-wheel drive effect of the tractor, greatly improving the climbing adhesion and good handling performance.

[0029] Reference Figure 1 , Figure 2 and Figure 5In a preferred embodiment, a limiting mechanism is provided at the front end of the support shell 1, and the limiting mechanism is used to limit the action of the adjusting mechanism. The limiting mechanism includes a groove 18 opened on the front side of the first screw rod 2, and a slide rod 19 is slidably connected inside the groove 18. A limiting hole 17 is equidistantly opened at the right end of the front side of the support shell 1, and a limiting block 21 is slidably connected to the upper end of the slide rod 19. A spring 20 is connected to the lower end of the limiting block 21, and the limiting block 21 is semicircular. A knob 22 is connected to the front side of the slide rod 19, and a limiting rod 16 is connected to the upper end of the rear side of the knob 22. The size of the limiting rod 16 is consistent with that of the limiting hole 17.

[0030] In the first implementation description, it is necessary to rotate the first screw rod 2, the second screw rod 4 and the third screw rod 8 to realize the up, down, left, right, front and back position adjustment of the diesel engine 10. Since the tractor is in a vibrating state as a whole during use, it is easy to cause the screw rod vibration to rotate, affecting the position of the diesel engine 10. Therefore, when the first screw rod 2 needs to be rotated, the slide bar 19 is originally clamped in the groove 18 by the limit block 21. At this time, the knob 22 is pulled forward by hand. Since the limit block 21 is semicircular, the limit block 21 is caused to shrink to the inside of the slide bar 19, and the slide bar 19 slides out of the groove 18. At the same time, the limit rod 16 slides out of the limit hole 17. At this time, the restriction of the knob 22 is eliminated, and it can be rotated. By rotating the knob 22, the first screw rod 2 is synchronously driven to rotate, thereby adjusting the diesel engine 10. 10 is adjusted. After the adjustment is completed, the limit rod 16 is prompted to be stuck in the limit hole 17 by pressing the knob 22, so that the knob 22 cannot rotate. Therefore, the first screw rod 2 cannot rotate during the vibration of the tractor, ensuring the fixation of the position of the diesel engine 10. At the same time, the limit rod 16 is stuck in the limit hole 17, and the slide rod 19 is stuck in the groove 18. The limit block 21 is popped out by the spring 20 and stuck in the card slot inside the groove 18, prompting the slide rod 19 to slide out of the groove 18 through pulling force, thereby ensuring that the limit rod 16 is stably connected to the limit hole 17 to prevent the limit rod 16 from sliding out due to shaking. Therefore, corresponding structures are set at the second screw rod 4 and the third screw rod 8 at the same time to ensure that the second screw rod 4 and the third screw rod 8 cannot rotate when the tractor is in use.

[0031] Working principle: When in use, after the diesel engine 10 is installed, it is necessary to install the triangular conveyor belt group 11 connected between the diesel engine 10 and the gearbox 13, so as to achieve the transmission effect. Since the gearbox 13 is installed in a fixed position and the diesel engine 10 has different sizes and shapes, it is not easy to adjust the triangular conveyor belt group 11 during installation. At that time, the position of the diesel engine 10 pulley and the gearbox 13 pulley will be observed according to the actual situation, so as to drive the diesel engine 10 installed on the installation box 5 to adjust the front and rear position by rotating the first screw rod 2 transmission cross plate 3. After the position adjustment is completed, the second screw rod 4 is rotated to prompt the diesel engine 10 on the installation box 5 to move left and right, so as to ensure that the diesel engine 10 pulley and the gearbox 13 are in contact with each other. The positions of the pulleys are aligned up and down. The aligned pulleys are to ensure that the V-belt group 11 can be installed or remain in a tensioned state after installation. At this time, the third screw rod 8 is rotated to cause the support plate 7 to move up and down in the slide groove 6, so that the diesel engine 10 installed on the support plate 7 can be adjusted up and down. By adjusting the up and down positions of the diesel engine 10, the distance between the pulley of the diesel engine 10 and the pulley of the gearbox 13 is adjusted to the optimal position, and then the V-belt group 11 is installed between the pulleys. By rotating the third screw rod 8, the V-belt group 11 installed on the pulley is adjusted to a tensioned state, thereby facilitating the installation and adjustment of the V-belt group 11 by adjusting the diesel engine 10 up and down, left and right, front and back.

[0032] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. The replacement can be a replacement of part of the structure, device, method step, or a complete technical solution. Equivalent replacement or change based on the technical solution of the utility model and its utility model concept should be included in the protection scope of the utility model.

Claims

1. A power transmission device for a four-wheel drive tractor, comprising a support shell (1), characterized in that: An adjustment mechanism is provided on the front side of the support shell (1), a diesel engine (10) is installed on the upper end of the front side of the support shell (1), and the adjustment mechanism is used to adjust the installation position of the diesel engine (10); The adjustment mechanism comprises a first screw rod (2) connected to the front side of the upper part of the support shell (1) by a bearing, the outer surface of the first screw rod (2) is threadedly connected to a transverse plate (3), the middle part of the upper end of the transverse plate (3) is connected to a second screw rod (4) by a bearing, the outer surface of the second screw rod (4) is threadedly connected to a mounting box (5), the mounting box (5) is provided with a slide groove (6) at the left and right ends of the inner side, the slide groove (6) is slidably connected to a support plate (7), and the right side of the support plate (7) is threadedly connected to a third screw rod (8); A driving mechanism is provided at the lower end of the support shell (1), and the driving mechanism is used to drive the front and rear tires to move synchronously; A limiting mechanism is arranged at the front end of the support shell (1), and the limiting mechanism is used to limit the action of the adjusting mechanism.

2. A power transmission device for a four-wheel drive tractor according to claim 1, characterized in that: The diesel engine (10) is fixedly connected to the upper end of the support plate (7), and the rear side of the diesel engine (10) is connected to a V-belt group (11).

3. A power transmission device for a four-wheel drive tractor according to claim 2, characterized in that: The driving mechanism comprises a gearbox (13) connected to the rear side of the lower end of the V-belt assembly (11), and the rear side of the gearbox (13) is drivingly connected to a transfer case (15).

4. The power transmission device of a four-wheel drive tractor according to claim 3, characterized in that: The lower ends of the front and rear sides of the transfer case (15) are connected to a transmission shaft (9) in a transmission manner, and one end of the transmission shaft (9) away from the transfer case (15) is connected to a bridge assembly (14).

5. The power transmission device of a four-wheel drive tractor according to claim 4, characterized in that: Tire groups (12) are installed on the front and rear sides below the support shell (1), and the two tire groups (12) are synchronously driven through the bridge assembly (14), the transmission shaft (9) and the transfer case (15).

6. The power transmission device of a four-wheel drive tractor according to claim 1, characterized in that: The limiting mechanism comprises a groove (18) formed on the front side of the first screw rod (2), a sliding rod (19) being slidably connected inside the groove (18), and limiting holes (17) are formed at equal distances on the right end of the front side of the support shell (1).

7. The power transmission device of a four-wheel drive tractor according to claim 6, characterized in that: The upper end of the slide rod (19) is slidably connected to a limit block (21), the lower end of the limit block (21) is connected to a spring (20), and the limit block (21) is semicircular.

8. The power transmission device of a four-wheel drive tractor according to claim 7, characterized in that: The front side of the sliding rod (19) is connected to a knob (22), and the upper end of the rear side of the knob (22) is connected to a limiting rod (16), and the limiting rod (16) has the same size as the limiting hole (17).

Images