A two-speed device for tractor transfer case output

Abstract

The utility model provides a kind of two-speed device of tractor transfer case output belongs to mechanical engineering technical field, including transfer case body, one side in the transfer case body is equipped with a pair of power input gear set, the side of power input gear set is equipped with power input clutch yoke, the other side in the transfer case body is equipped with two pairs of two-speed gear set, gear between two-speed gear set is equipped with to realize two-speed yoke, the yoke of realizing two-speed yoke is equipped with yoke plate guide shaft, realizing two-speed yoke is connected with transfer case body by yoke plate guide shaft.The two-speed gear set is set, two sets of clutch gear set are innovatively set in the intermediate tank of traditional only transmission function, and the collaborative control of two-speed yoke and power input clutch yoke is realized by cooperation, the function upgrading of transfer case internal structure is realized, and equipment is switched between single speed and high speed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, specifically a dual-speed device for the output of a tractor transfer case. Background Technology

[0002] As a key component in the power transmission system of four-wheel drive vehicles, the transfer case is mainly used to rationally distribute the power output of the engine to the front and rear axles in order to achieve multi-axle drive and improve stability. Traditional transfer cases usually include an intermediate transmission case connected by a drive shaft. Its main function is power transmission, and its structure often uses a gear set with a fixed transmission ratio.

[0003] Most transfer cases on the market are still limited to a single transmission function. The intermediate case has a simple structure and only serves as a power transmission channel at the same speed. It cannot adjust the output speed. When faced with complex terrain or different driving needs, this traditional design has a single power distribution mode and it is difficult to balance low-speed high torque and high-speed high efficiency. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a dual-speed device for the output of a tractor transfer case that overcomes or at least partially solves the above technical problems.

[0005] This utility model is implemented as follows: This utility model provides a dual-speed device for outputting power from a tractor transfer case, comprising a transfer case body. The device is characterized in that: a power input gear set is provided on one side of the transfer case body, and a power input clutch fork for switching power input on and off is provided on the side of the power input gear set; a dual-speed gear set is provided on the other side of the transfer case body, and a single / dual-speed linkage fork for realizing dual-speed power output is provided between the gears of the dual-speed gear set; a fork plate guide shaft is provided on the fork fork for realizing single / dual-speed linkage, and the single / dual-speed linkage fork is connected to the transfer case body through the fork plate guide shaft; a standard component assembly is provided on the side of the transfer case body, and the fork plate guide shaft is connected to the transfer case body through the standard component assembly.

[0006] As a preferred embodiment, the power input gear set includes a drive gear and a double-drive gear, which engage vertically for transmission. The drive gear and double-drive gear are rotatably connected to the transfer case via a drive input shaft. The power input clutch fork controls the power input on / off via the engagement of the power output engagement seat and power output engagement sleeve with the double-drive gear. The drive gear and double-drive gear mesh vertically, and the power is transmitted through the sliding engagement of the output engagement seat and engagement sleeve at the small tooth end of the double-drive gear. When the power transmission fork moves upward, power is transmitted from the right side to the left dual-speed gear set; when the fork moves downward, power transmission stops.

[0007] In one embodiment of this utility model, the power input clutch fork is connected to the transfer case via a movable shaft, and the fork of the power input clutch fork extends through to the outside of the transfer case.

[0008] As a preferred embodiment, the dual-speed gear set includes a first double gear, a second double gear, a third double gear, and a fourth double gear, and the transfer case is connected to the first double gear, the second double gear, the third double gear, and the fourth double gear respectively via a movable shaft.

[0009] As a preferred embodiment, the power input gear set is located in the right half of the transfer case, and the dual-speed gear set is located in the left half of the transfer case.

[0010] As a preferred embodiment, the double transmission gear and the first double gear are connected by two splined shafts through a splined sleeve, and the first double gear has an output shaft end located on the side of the transfer case.

[0011] As a preferred embodiment, the output engagement seat includes a first power output engagement seat and a second power output engagement seat, and the engagement sleeve includes a first engagement sleeve and a second engagement sleeve. The first power output engagement seat is disposed between the first double gear and the second double gear, and the second power output engagement seat is disposed between the third double gear and the fourth double gear. The linkage shift fork mechanism controls the transmission between the first double gear and the second double gear through the first engagement sleeve and the first power output engagement seat, and the linkage shift fork mechanism controls the transmission between the second double gear and the second double gear through the second engagement sleeve and the second power output engagement seat.

[0012] The present invention provides a dual-speed device for the output of a tractor transfer case, the advantages of which include: 1. By setting up a dual-speed gear set, and innovatively setting two clutch gear sets in the traditional intermediate box which only has a transmission function, and coordinating the control of the dual-speed shift fork and the power input clutch shift fork, the internal structure of the transfer case is upgraded. It abandons the limitation of the single transmission path of the traditional intermediate box. Power input and stop are realized through shift fork control. Especially in dual-speed mode, the second double gear drives the fourth double gear and indirectly transmits to the first transmission gear through the third double gear to form a speed change transmission chain. Dual-mode output can be achieved by adding only two pairs of gears and one shift fork mechanism, which greatly simplifies the complexity of the speed change mechanism and improves the integration and modularity of the transfer case. It has the advantages of compact structure, clear transmission path, fewer parts, and convenient assembly and maintenance. It provides a new technical path for the miniaturization and multi-functionality of agricultural machinery transmission systems.

[0013] 2. By implementing a dual-speed shift fork, the transfer case can flexibly switch between normal speed and dual-speed output modes to meet the power needs of the tractor under different operating conditions. Normal speed output is used during routine operations to ensure stable power transmission; in scenarios requiring high-speed output, switching to high-speed mode increases the output shaft speed without replacing the external transmission device, significantly improving work efficiency and operational convenience. Simultaneously, power is controlled by the clutch shift fork mechanism, achieving smooth gear engagement and power input, reducing impact and extending the life of the transmission system. Overall, the system is simple to operate, responds quickly, and is highly adaptable, especially suitable for agricultural tractors operating in diverse terrains and with multiple tasks. It significantly improves the overall adaptability of the machine and the user experience, demonstrating good potential for widespread application. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram provided by an embodiment of the present utility model.

[0016] Figure 2 A perspective view provided for an embodiment of this utility model.

[0017] Figure 3 A front sectional view provided for an embodiment of this utility model.

[0018] Figure 4 Bottom sectional view provided for an embodiment of this utility model.

[0019] In the diagram: 1. Transfer case; 2. Power input gear set; 201. Drive gear; 3. Power input clutch fork; 4. Dual-speed gear set; 401. Transmission double gear; 402. First double gear; 403. Second double gear; 404. Third double gear; 405. Fourth double gear; 406. First double gear pinion end; 407. Second double gear pinion end; 408. Power output engagement sleeve; 409. Spline sleeve; 5. Single / dual-speed linkage fork; 6. Fork plate guide shaft; 7. Output shaft end; 8. Standard component assembly. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0021] Reference Figures 1-4 This technical solution provides a dual-speed device for the output of a tractor transfer case, including a transfer case 1. A power input gear set 2 is provided on one side of the transfer case 1. A power input clutch fork 3 for switching power input is provided on the side of the power input gear set 2. A dual-speed gear set 4 is provided on the other side of the transfer case 1. A single / dual-speed linkage fork 5 for realizing dual-speed power output is provided between the gears of the dual-speed gear set 4. A fork plate guide shaft 6 is provided on the fork of the single / dual-speed linkage fork 5. The single / dual-speed linkage fork 5 is connected to the transfer case 1 through the fork plate guide shaft 6. A standard component assembly 8 is provided on the side of the transfer case 1. The fork plate guide shaft 6 is connected to the transfer case 1 through the standard component assembly 8. The standard component assembly 8 is an existing installation component.

[0022] Reference Figures 1-4 The power input gear set 2 includes a drive gear 201 and a double transmission gear 401. The drive gear 201 and the double transmission gear 401 engage vertically for transmission. The drive gear 201 and the double transmission gear 401 are rotatably connected to the transfer case 1 via a drive input shaft. The power input clutch fork 3 controls the on / off state of power input through the engagement of the power output engagement seat and the power output engagement sleeve 408 with the double transmission gear 401. The drive gear and the double transmission gear mesh vertically, and the transmission is achieved through the sliding engagement of the output engagement seat and the engagement sleeve at the small tooth end of the double gear. When the power transmission fork moves upward, power is transmitted from the right side to the left dual-speed gear set; when the fork moves downward, power transmission stops.

[0023] Reference Figures 1-4 The power input clutch fork 3 is connected to the transfer case 1 via a movable shaft, and the fork of the power input clutch fork 3 extends through to the outside of the transfer case 1.

[0024] Reference Figures 1-4Based on the same concept as Embodiment 1 above, this embodiment also proposes a dual-speed gear set 4 including a first double gear 402, a second double gear 403, a third double gear 404 and a fourth double gear 405. The transfer case 1 is connected to the first double gear 402, the second double gear 403, the third double gear 404 and the fourth double gear 405 respectively through a spline shaft.

[0025] Reference Figures 1-4 Based on the same concept as Embodiment 1 above, this embodiment also proposes that the power input gear set 2 is located in the right half of the transfer case 1, and the dual-speed gear set 4 is located in the left half of the transfer case 1.

[0026] Reference Figures 1-4 The double transmission gear 401 and the first double gear 402 are connected by two splined shafts through the middle of the splined sleeve 409. The first double gear 402 has an output shaft end 7 located on the side of the transfer case 1 on its rotating shaft.

[0027] Reference Figures 1-4 The output engagement seat includes a first power output engagement seat and a second power output engagement seat. The engagement sleeve includes a first engagement sleeve and a second engagement sleeve. The first power output engagement seat is disposed between the first double gear 402 and the second double gear 403. The second power output engagement seat is disposed between the third double gear 404 and the fourth double gear 405. The linkage shift fork mechanism controls the transmission between the first double gear 402 and the second double gear 403 through the first engagement sleeve and the first power output engagement seat. The linkage shift fork mechanism controls the transmission between the second double gear 402 and the second double gear 403 through the second engagement sleeve and the second power output engagement seat.

[0028] Specifically, the working process or working principle of the dual-speed device output by the tractor transfer case is as follows: When in use, the drive gear 201 of the power input gear set 2 is engaged with the gear in the tractor's power box to input power. By shifting the power input clutch fork 3, the drive gear 201 is connected to the transmission gear 401 and driven, thereby rotating the first gear 402. In single-speed output drive, the dual-speed fork 5 connects the pinion end 406 of the first double gear and the power output engagement seat through the power output engagement sleeve, thereby realizing the direct connection of the first gear 402. This state is the original speed output of the transfer case. After setting the dual-speed output drive, the dual-speed shift fork 5 engages the second double gear pinion end 407 and the power output engagement seat through the engagement sleeve. The first double gear 402 is disengaged from the direct drive. At this time, the second double gear 403 does not drive the first double gear 402 directly. The second double gear 403 drives the fourth double gear 405. At this time, the second double gear pinion end 407 is in the transmission connection state, so it will indirectly drive the first gear 402 to rotate through the third gear 404 to achieve dual-speed power output. By setting the third gear 404 and the fourth gear 405 to different specifications, the speed change output of the output shaft end 7 can be achieved.

[0029] Working principle: The shift fork operates in two positions. When the shift fork moves to the right, the first double gear (402) disengages from the second double gear (403), and the power is transmitted from the second double gear (403) → fourth double gear (405) → third double gear (404) → first double gear (402) to the output end, resulting in high-speed output. When the shift fork moves to the left, the third double gear (404) disengages from the fourth double gear (405), and the power is transmitted directly from the second double gear (403) to the first gear (402) and then to the output end, resulting in the same speed output.

[0030] It should be noted that standard component 8 is a device or equipment existing in the prior art, or a device or equipment that can be implemented by the prior art. Its power supply, specific composition and principle are clear to those skilled in the art, so they will not be described in detail.

Claims

1. A dual-speed device for outputting a tractor transfer case, comprising a transfer case body (1), characterized in that: One side of the transfer case (1) is provided with a power input gear set (2), and the side of the power input gear set (2) is provided with a power input clutch fork (3) for switching power input on and off. The other side of the transfer case (1) is provided with a dual-speed gear set (4), and the gears of the dual-speed gear set (4) are provided with a single-speed and dual-speed linkage fork (5) to realize dual-speed power output. The fork of the single-speed and dual-speed linkage fork (5) is provided with a fork plate guide shaft (6). The single-speed and dual-speed linkage fork (5) is connected to the transfer case (1) through the fork plate guide shaft (6). The side of the transfer case (1) is provided with a standard component assembly (8), and the fork plate guide shaft (6) is connected to the transfer case (1) through the standard component assembly (8).

2. The dual-speed device output from a tractor transfer case according to claim 1, characterized in that, The power input gear set (2) includes a drive gear (201) and a double transmission gear (401). The drive gear (201) and the double transmission gear (401) are coupled and driven from top to bottom. The drive gear (201) and the double transmission gear (401) are rotatably connected to the transfer case (1) through the drive input shaft. The power input clutch fork (3) controls the power input on and off through the cooperation of the power output engagement seat and the power output engagement sleeve (412) with the double transmission gear (401).

3. The dual-speed device output from a tractor transfer case according to claim 2, characterized in that, The power input clutch fork (3) is connected to the transfer case (1) via a movable shaft, and the fork of the power input clutch fork (3) extends through to the outside of the transfer case (1).

4. A dual-speed device for outputting a tractor transfer case according to claim 3, characterized in that, The dual-speed gear set (4) includes a first double gear (402), a second double gear (403), a third double gear (404), and a fourth double gear (405). The transfer case (1) is connected to the first double gear (402), the second double gear (403), the third double gear (404), and the fourth double gear (405) respectively via a movable shaft.

5. A dual-speed device for outputting a tractor transfer case according to claim 4, characterized in that, The double transmission gear (401) and the first double gear (402) are connected by two splined shafts through a splined sleeve (413). The first double gear (402) has an output shaft end (7) located on the side of the transfer case (1).

6. A dual-speed device for outputting a tractor transfer case according to claim 5, characterized in that, The output engagement seat includes a first power output engagement seat and a second power output engagement seat. The engagement sleeve includes a first engagement sleeve and a second engagement sleeve. The first power output engagement seat is disposed between the first double gear (402) and the second double gear (403). The second power output engagement seat is disposed between the third double gear (404) and the fourth double gear (405). The linkage shift fork mechanism controls the transmission between the first double gear (402) and the second double gear (403) through the first engagement sleeve and the first power output engagement seat. The linkage shift fork mechanism controls the transmission between the second double gear (402) and the second double gear (403) through the second engagement sleeve and the second power output engagement seat.

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