Transmission case

Abstract

The transmission case comprises a shell, the shell is rotationally connected with an input shaft and an output shaft, the input shaft is perpendicular to the output shaft, a first transmission shaft and a second transmission shaft are connected between the input shaft and the output shaft in a speed reduction transmission mode, and the first transmission shaft and the input shaft are arranged in parallel and connected in a speed reduction transmission mode. The second transmission shaft and the output shaft are arranged in parallel and are in deceleration transmission connection, and the first transmission shaft and the second transmission shaft are vertically arranged and are in deceleration transmission connection. According to the scheme, the problem that in the prior art, a transmission box is large in size when multi-stage speed reduction design is carried out is solved.

Description

Technical Field

[0001] The utility model relates to a transmission case. Background Art

[0002] A transmission case is a device used in working machinery to adjust the input rotational speed and direction to the required rotational speed and direction and then output them.

[0003] Chinese Patent Document CN215370795U discloses a driving gearbox with a novel structure, including a housing S, an input shaft, a drive shaft group, and an output shaft group installed in the housing S; the drive shaft group includes a first drive shaft and a second drive shaft, the output shaft group includes a first output shaft and a second output shaft, the input shaft, the first drive shaft, and the second drive shaft are arranged in parallel, the central axes of the first output shaft and the second output shaft are on the same straight line, and the central axes of the first output shaft and the second output shaft are respectively perpendicular to the central axis of the second drive shaft; a gear C1 fixed on the input shaft meshes with a gear C2 fixed on the first drive shaft, a gear C3 fixed on the first drive shaft meshes with a gear C4 fixed on the second drive shaft, and a gear C5 fixed on the second drive shaft meshes with gears C6 and C7 fixed on the first output shaft and the second output shaft respectively.

[0004] The driving gearbox in the above prior art realizes a simplified structure design, but it only realizes two-stage reduction drive, and the overall structure is relatively high in the vertical direction. For a transmission case used in small working machinery, two-stage reduction drive is difficult to meet the requirements of various operations, and due to the large size in the height direction, it also increases the installation and use difficulty. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a transmission case to solve the problem of large volume when the transmission case in the prior art performs multi-stage reduction design.

[0006] To achieve the above purpose, the basic scheme of the utility model provides a transmission case, including a housing, the housing is rotatably connected with an input shaft and an output shaft, the input shaft and the output shaft are arranged perpendicular to each other, a first drive shaft and a second drive shaft are connected by reduction drive between the input shaft and the output shaft, the first drive shaft is arranged in parallel with the input shaft and connected by reduction drive, the second drive shaft is arranged in parallel with the output shaft and connected by reduction drive, and the first drive shaft and the second drive shaft are arranged perpendicular to each other and connected by reduction drive.

[0007] The beneficial effects of this basic solution are as follows: With such a setting, when multi-stage speed reduction transmission is carried out between the input shaft and the output shaft, the space between the input shaft and the output shaft can be fully utilized, which is beneficial to improving the structural compactness of the transmission case, and thus beneficial to the installation and layout of the transmission case.

[0008] Preferably, a shift gear set is arranged between the input shaft and the first transmission shaft, and a shift fork mechanism cooperating with the shift gear set is arranged in the housing. With such a setting, by using the shift fork mechanism to adjust the shift gear set to switch different transmission ratios, the transmission case can output different powers, enabling the transmission case to adapt to different operating requirements, and further improving the practicality of the transmission case.

[0009] Preferably, the first transmission shaft and the second transmission shaft are connected by a bevel gear set for speed reduction transmission. With such a setting, it is beneficial to further improve the structural compactness of the transmission case.

[0010] Preferably, a third transmission shaft is further arranged between the second transmission shaft and the output shaft. The third transmission shaft is arranged parallel to the second transmission shaft and is connected by a first gear set for speed reduction transmission. The third transmission shaft is arranged parallel to the output shaft and is connected by a second gear set for speed reduction transmission. With such a setting, it is beneficial to ensure the structural compactness of the transmission case while extending the power transmission path between the input shaft and the output shaft.

[0011] Preferably, the third transmission shaft and the output shaft are arranged side by side along the axial direction of the first transmission shaft. With such a setting, it is beneficial to further improve the structural compactness of the transmission case.

[0012] Preferably, the first gear set includes a first driven gear fixedly connected to the third transmission shaft. The second gear set includes a second driving gear rotatably connected to the third transmission shaft. The second driving gear is slidably engaged with the third transmission shaft along the axial direction of the third transmission shaft. The second driving gear and the first driven gear are engaged and disengaged by a transmission pawl. With such a setting, it is convenient to control the on-off of the power of the output shaft to meet different operating requirements, and further enhance the practicality of the transmission case.

[0013] Preferably, a transmission shift fork for driving the second driving gear to move is arranged in the housing. With such a setting, it is convenient to control the second driving gear.

[0014] Preferably, the output shaft includes a first output section and a second output section arranged coaxially. A second gear set is provided between the third transmission shaft and the first output section and the second output section respectively. The second driving gears of the two second gear sets are respectively located on both sides of the first driven gear, and the two second driving gears are respectively connected with transmission forks. With such an arrangement, the transmission case can output power separately through the first output section and the second output section, and the power output of the first output section and the second output section can be independently controlled through the corresponding transmission forks, which is beneficial to further improve the practicability of the transmission case.

[0015] Preferably, a braking mechanism for braking the second driving gear when the second driving gear and the first driven gear are in a separated state is connected to the third transmission shaft. With such an arrangement, it is convenient to brake the second driving gear in time to prevent it from continuing to rotate under the action of inertia, which is beneficial to improving the controllability.

[0016] Preferably, one end of the input shaft extends to the outside of the housing. With such an arrangement, it is convenient to directly use the input shaft as the power source of other devices, which is beneficial to enhancing the functions of the transmission case and can also avoid the complication of the structure. Description of the Drawings

[0017] Figure 1 is a schematic diagram of an embodiment of a transmission case of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram with the housing part omitted in Detailed Description of the Embodiment

[0019] The following is further detailed through specific embodiments:

[0020] The reference numerals in the accompanying drawings of the specification include: housing 1, input shaft 2, shift driving gear 3, shift fork mechanism 4, shift driven gear 5, first transmission shaft 6, driving bevel gear 7, second driven gear 8, output shaft 9, third transmission shaft 10, braking mechanism 11, second driving gear 12, first driven gear 13, transmission fork 14, first driving gear 15, driven bevel gear 16, second transmission shaft 17.

[0021] The embodiment is basically as shown in the attached Figure 1 and Figure 2As shown: A transmission case includes a housing 1. An input shaft 2 and an output shaft 9 are rotatably connected to the housing 1, and the input shaft 2 and the output shaft 9 are arranged perpendicular to each other. A first transmission shaft 6 and a second transmission shaft 17 are connected by a speed reduction transmission between the input shaft 2 and the output shaft 9. The first transmission shaft 6 is arranged parallel to the input shaft 2 and is connected by a speed reduction transmission, the second transmission shaft 17 is arranged parallel to the output shaft 9 and is connected by a speed reduction transmission, and the first transmission shaft 6 and the second transmission shaft 17 are arranged perpendicular to each other and are connected by a speed reduction transmission.

[0022] In this embodiment, a shift gear set is provided between the input shaft 2 and the first transmission shaft 6, and a shift fork mechanism 4 that cooperates with the shift gear set is arranged in the housing 1. Specifically, the shift gear set includes a shift driving gear 3 and a shift driven gear 5. The shift driving gear 3 is connected to the input shaft 2 by a sliding key, and the shift driven gear 5 is connected to the first transmission shaft 6 by a key; the shift fork mechanism 4 cooperates with the shift driving gear 3, and the shift driving gear 3 is driven to move by the shift fork mechanism 4 to realize the switching of different transmission ratios between the shift driving gear 3 and the shift driven gear 5.

[0023] In this embodiment, the first transmission shaft 6 and the second transmission shaft 17 are connected by a speed reduction transmission through a bevel gear set. Specifically, the bevel gear set includes a driving bevel gear 7 and a driven bevel gear 16 that mesh with each other. The driving bevel gear 7 is fixedly connected to the end of the first transmission shaft 6, and the driven bevel gear 16 is fixedly connected to the second transmission shaft 17.

[0024] In this embodiment, a third transmission shaft 10 is further arranged between the second transmission shaft 17 and the output shaft 9. The third transmission shaft 10 is arranged parallel to the second transmission shaft 17 and is connected by a first gear set for speed reduction transmission, and the third transmission shaft 10 is arranged parallel to the output shaft 9 and is connected by a second gear set for speed reduction transmission. In this embodiment, the third transmission shaft 10 and the output shaft 9 are arranged side by side along the axial direction of the first transmission shaft 6.

[0025] Specifically, the first gear set includes a first driving gear 15 and a first driven gear 13 that mesh with each other. The first driving gear 15 is connected to the second transmission shaft 17 by a key, and the first driven gear 13 is connected to the third transmission shaft 10 by a key. The second gear set includes a second driving gear 12 and a second driven gear 8 that mesh with each other. The second driving gear 12 is rotatably connected to the third transmission shaft 10, and the second driven gear 8 is connected to the output shaft 9 by a key. The second driving gear 12 is slidably matched with the third transmission shaft 10 along the axial direction of the third transmission shaft 10, and the second driving gear 12 and the first driven gear 13 are in a clutch fit through a transmission pawl. In this embodiment, the transmission pawl is arranged on the end faces of the second driving gear 12 and the first driven gear 13. A transmission shift fork 14 for driving the second driving gear 12 to move is arranged in the housing 1, and the second driving gear 12 is driven to move by the transmission shift fork 14 to realize the switching between the engaged state and the separated state with the first driven gear 13.

[0026] In this embodiment, the output shaft 9 includes a first output segment and a second output segment which are coaxially arranged, and the first output segment and the second output segment respectively extend out from both sides of the housing 1; there are second gear sets respectively arranged between the third transmission shaft 10 and the first output segment and the second output segment, the second driving gears 12 of the two second gear sets are respectively located on both sides of the first driven gear 13, and the two second driving gears 12 are respectively connected with transmission forks 14 in a mating manner. Thus, the transmission case can output power separately through the first output segment and the second output segment, and the power output of the first output segment and the second output segment can be independently controlled through the corresponding transmission forks 14.

[0027] In this embodiment, a braking mechanism 11 for braking the second driving gear 12 when the second driving gear 12 and the first driven gear 13 are in a separated state is connected to the third transmission shaft 10, so that the second driving gear 12 can quickly stop rotating after being separated from the first driven gear 13. In this embodiment, one end of the input shaft 2 extends to the outside of the housing 1, so that the input shaft 2 can directly output power for use by other devices.

[0028] During use, power is input into the transmission case through the input shaft 2, the input shaft 2 transmits the power to the first transmission shaft 6 through the shift gear set, the first transmission shaft 6 transmits the power to the second transmission shaft 17 through the bevel gear set, and the second transmission shaft 17 transmits the power to the third transmission shaft 10 through the first gear set. When the second driving gear 12 and the first driven gear 13 are in a combined state, the third transmission shaft 10 transmits the power to the output shaft 9 through the second gear set. When the second driving gear 12 and the first driven gear 13 are in a separated state, the power transmission between the third transmission shaft 10 and the output shaft 9 is interrupted, so that the output shaft 9 stops rotating.

[0029] The above are only embodiments of the present utility model, and common knowledge such as specific structures and characteristics known in the solution is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent.

Claims

1. A transmission case, comprising a housing, wherein an input shaft and an output shaft are rotatably connected to the housing, the input shaft and the output shaft are arranged perpendicular to each other, and a first transmission shaft and a second transmission shaft are connected in a speed-reducing manner between the input shaft and the output shaft, and it is characterized in that: The first transmission shaft is arranged parallel to the input shaft and is connected by a speed-reducing transmission. The second transmission shaft is arranged parallel to the output shaft and is connected by a speed-reducing transmission. The first transmission shaft is arranged perpendicular to the second transmission shaft and is connected by a speed-reducing transmission.

2. The drive box according to claim 1, characterized in that: A shift gear set is arranged between the input shaft and the first transmission shaft, and a shift fork mechanism cooperating with the shift gear set is arranged in the housing.

3. A transmission case according to claim 1 or 2, characterized in that: The first transmission shaft and the second transmission shaft are connected by a bevel gear set for speed-reducing transmission.

4. A transmission case according to claim 3, characterized in that: A third transmission shaft is further arranged between the second transmission shaft and the output shaft. The third transmission shaft is arranged parallel to the second transmission shaft and is connected by a first gear set for speed-reducing transmission. The third transmission shaft is arranged parallel to the output shaft and is connected by a second gear set for speed-reducing transmission.

5. A transmission case according to claim 4, characterized in that: The third transmission shaft and the output shaft are arranged side by side along the axial direction of the first transmission shaft.

6. A transmission case according to claim 5, characterized in that: The first gear set includes a first driven gear fixedly connected to the third transmission shaft. The second gear set includes a second driving gear rotatably connected to the third transmission shaft. The second driving gear is slidably engaged with the third transmission shaft along the axial direction of the third transmission shaft. The second driving gear and the first driven gear are engaged and disengaged by a transmission pawl.

7. A transmission case according to claim 6, characterized in that:

8. A transmission case according to claim 7, characterized in that: A transmission shift fork for driving the second driving gear to move is arranged in the housing.

9. A transmission case according to claim 8, characterized in that: The output shaft includes a first output section and a second output section arranged coaxially. The second gear sets are respectively arranged between the third transmission shaft and the first output section and the second output section. The second driving gears of the two second gear sets are respectively located on both sides of the first driven gear, and the two second driving gears are respectively connected with transmission shift forks.

10. A transmission case according to claim 8, characterized in that: A braking mechanism for braking the second driving gear when the second driving gear and the first driven gear are in a separated state is connected to the third transmission shaft. One end of the input shaft extends to the outside of the housing.

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