Outboard engine transmission case assembly and agricultural transmission case

Abstract

The utility model discloses an outboard engine transmission case assembly and an agricultural transmission case. The outboard engine transmission case assembly comprises a shell, a rotating shaft, a pushing shaft, a first gear, a second gear, a third gear and a fourth gear, wherein the rotating shaft and the pushing shaft are rotationally mounted in the shell and are arranged in parallel; the rotating shaft is sleeved with the first gear and the second gear at intervals; the pushing shaft is sleeved with the third gear and the fourth gear at intervals; the shifting fork assembly is installed on the rotating shaft in a sliding mode and distributed between the first gear and the second gear, the first gear is in transmission connection with the third gear through a chain, and the second gear is meshed with the fourth gear. Due to the fact that the first gear is in transmission connection with the third gear through the chain, the second gear is meshed with the fourth gear, the shifting fork assembly slides along the rotating shaft to achieve transmission connection between the rotating shaft and the first gear or the second gear to achieve gear switching, and direct meshing of the first gear and the third gear is avoided through chain transmission connection. When external resistance is large, damage to the gear is effectively avoided, and the service life of the gear is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of ships, and particularly relates to an outboard engine transmission case assembly and an agricultural transmission case. Background Art

[0002] In order to propel a ship, an outboard engine is usually installed at the stern for driving. Generally, the outboard engine consists of an upper motor with an internal combustion engine and a lower motor part with a transmission shaft. The transmission shaft is connected to the internal combustion engine through the transmission shaft and is used to convey exhaust gas from the upper part to the lower part.

[0003] In the current outboard engine, the drive shaft extends vertically and has a drive gear at its lower end. The drive gear is coupled to the propeller shaft through a push shaft in the clutch mechanism. When shifting gears, that is, when switching between forward gear, neutral gear, and reverse gear, since the current gear shifting is achieved by the engagement of the forward gear or reverse gear in the transmission case assembly with the gear on the push shaft, when the resistance of forward or reverse is large, it will cause a large impact on the meshing gears during the gear shifting process, and it is easy to cause damage to the gears. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide an outboard engine transmission case assembly and an agricultural transmission case, aiming to solve the technical problem that the gears are easily damaged during the gear shifting process of the existing outboard engine transmission case assembly, which affects the service life of the gears.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: an outboard engine transmission case assembly, comprising:

[0006] A housing;

[0007] A rotating shaft, rotatably installed in the housing and used for driving connection with an external power device;

[0008] A first gear and a second gear, sleeved on the rotating shaft at intervals, and the rotating shaft rotates relative to the first gear and the second gear;

[0009] A push shaft, rotatably installed on the housing and arranged parallel to the rotating shaft, and used for driving connection with a flexible shaft propeller;

[0010] A third gear and a fourth gear, sleeved on the push shaft at intervals, the first gear is connected to the third gear through a chain drive, the second gear is meshed with the fourth gear, and;

[0011] A fork assembly, slidably installed on the rotating shaft and distributed between the first gear and the second gear, and used for making the rotating shaft drive-connected with the first gear or the second gear.

[0012] Further, the fork assembly includes a sleeve sleeved on the rotating shaft, a fork mounted on the housing, and a handle for driving the fork to move along the axial direction of the rotating shaft so that the fork pushes the sleeve to move. The handle is mounted on the housing.

[0013] Further, the fork assembly further includes a limit assembly for limiting the sliding stroke of the fork. The limit assembly is mounted in the housing.

[0014] Further, the limit assembly includes a limit block fixedly arranged in the housing. At least one limit groove is provided on one side of the limit block facing the fork. A steel ball is provided on the fork for abutting and sliding with the limit block. The steel ball is used to be caught in the limit groove when the sleeve is in transmission connection with the first gear or the second gear.

[0015] Further, the limit assembly further includes an elastic member for elastically pushing the steel ball. A receiving groove for receiving the elastic member is formed on the fork.

[0016] Further, the number of the limit grooves is two.

[0017] Further, the sleeve includes a sleeve body and a first boss arranged on one side of the sleeve body. A first jack for inserting the first boss is formed on the first gear.

[0018] Further, a second boss is arranged on the other side of the sleeve body. A second jack for inserting the second boss is formed on the second gear.

[0019] Further, a card slot for receiving the fork is formed on the sleeve body.

[0020] This application also provides an agricultural transmission box, including the outboard engine transmission box assembly as described above.

[0021] The beneficial effects of the present utility model are as follows: Compared with the prior art, in an outboard engine transmission box assembly of the present utility model, a rotating shaft and a pushing shaft are arranged in the housing, a first gear and a second gear are arranged on the rotating shaft, a third gear and a fourth gear are arranged on the pushing shaft, and the first gear is in transmission connection with the third gear through a chain, and the second gear is meshed with the fourth gear. Thus, the transmission connection between the rotating shaft and the first gear or the second gear can be realized by sliding the fork assembly along the rotating shaft to achieve gear shifting. Moreover, by adopting chain transmission connection, direct meshing between the first gear and the third gear is avoided. When the external resistance is large, damage to the gears can be effectively avoided, and the service life of the gears is improved.

[0022] Other advantages, objectives and features of the present utility model will be elaborated in the subsequent description, and to some extent are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following description. Brief Description of the Drawings

[0023] In order to make the objectives, technical solutions and beneficial effects of the present utility model clearer, the following drawings are provided for the description of the present utility model:

[0024] Figure 1 Structural schematic diagram of an outboard engine transmission case assembly proposed in an embodiment of the present utility model;

[0025] Figure 2 Internal structural schematic diagram of an outboard engine transmission case assembly proposed in an embodiment of the present utility model;

[0026] Figure 3 Structural schematic diagram of an outboard engine transmission case assembly with the housing completely removed in an embodiment of the present utility model;

[0027] Figure 4 Exploded view of a partial structure of a fork assembly proposed in an embodiment of the present utility model;

[0028] Figure 5 Structural schematic diagram of a fork assembly and a rotating shaft proposed in an embodiment of the present utility model.

[0029] Reference Numerals in the Drawings:

[0030] 1 - Housing;

[0031] 2 - Rotating shaft; 21 - Spline; 22 - Driving gear;

[0032] 3 - First gear; 31 - First jack;

[0033] 4 - Second gear; 41 - Second jack;

[0034] 5 - Pushing shaft;

[0035] 6 - Third gear;

[0036] 7 - Fourth gear;

[0037] 8 - Chain;

[0038] 9 - Fork assembly; 91 - Sleeve; 911 - Sleeve body; 912 - First boss; 913 - Second boss; 914 - Card slot; 92 - Fork; 93 - Handle; 94 - Limiting assembly; 941 - Limiting block; 942 - Limiting groove; 943 - Steel ball; 944 - Elastic member; 95 - Spline groove. Detailed implementation mode

[0039] As Figures 1 to 5 shown, this embodiment proposes an outboard motor gearbox assembly. The outboard motor gearbox assembly includes a housing 1, a rotating shaft 2, a first gear 3, a second gear 4, and a push shaft 5. The rotating shaft 2 is rotatably installed in the housing 1, and the rotating shaft 2 is in transmission connection with an external power device. The power can be transmitted to the rotating shaft 2 through the external power device. The first gear 3 and the second gear 4 are sleeved on the rotating shaft 2 at intervals. The rotating shaft 2 can rotate relative to the first gear 3 and the second gear 4. The push shaft 5 is rotatably installed on the housing 1 and is arranged parallel to the rotating shaft 2. The push shaft 5 is in transmission connection with a flexible shaft propeller. In addition, a third gear 6 and a fourth gear 7 are further provided on the push shaft 5. The third gear 6 and the fourth gear 7 are distributed at intervals. The first gear 3 and the third gear 6 are in transmission connection through a chain 8. The second gear 4 and the fourth gear 7 are engaged with each other. In addition, a fork assembly 9 is further provided between the first gear 3 and the second gear 4. The fork assembly 9 is slidably installed on the rotating shaft 2. The fork assembly 9 can make the rotating shaft 2 in transmission connection with the first gear 3 or the second gear 4. In this way, by arranging the rotating shaft 2 and the push shaft 5 in the housing 1, the first gear 3 and the second gear 4 are provided on the rotating shaft 2, the third gear 6 and the fourth gear 7 are provided on the push shaft 5, and the first gear 3 and the third gear 6 are in transmission connection through the chain 8, and the second gear 4 and the fourth gear 7 are engaged with each other. Therefore, the rotating shaft 2 can be in transmission connection with the first gear 3 or the second gear 4 by sliding the fork assembly 9 along the rotating shaft 2 to achieve gear shifting. And by adopting the chain 8 for transmission connection, direct meshing between the first gear 3 and the third gear 6 is avoided. When the external resistance is large, damage to the gears is effectively avoided, and the service life of the gears is improved.

[0040] In the present application, the shift pattern includes forward, neutral, and reverse modes. The forward and reverse modes are driving modes, and the neutral mode is a non-driving mode. When the fork assembly 9 is in the middle position between the first gear 3 and the second gear 4, i.e., the initial state, it is in the neutral mode at this time. Only the rotating shaft 2 rotates, and neither the first gear 3 nor the second gear 4 rotates. When a gear shift is required, that is, when the fork assembly 9 slides towards the first gear 3, when the fork assembly 9 slides to a suitable position, the rotating shaft 2 is drivingly connected to the first gear 3. Then, the rotating shaft 2 can drive the first gear 3 to rotate. The first gear 3 drives the third gear 6 to rotate synchronously through the chain 8, and the third gear 6 drives the push shaft 5 to rotate, realizing the switching of the forward gear or the reverse gear. When the fork assembly 9 slides towards the second gear 7, when the fork assembly 9 slides to a suitable position, the rotating shaft 2 is drivingly connected to the second gear 4. Then, the rotating shaft 2 can drive the second gear 4 to rotate, and the second gear 4 drives the fourth gear 7 to rotate relatively. The fourth gear 7 drives the push shaft 5 to rotate, realizing the switching of the reverse gear or the forward gear. After a gear shift is completed, the push shaft 5 drives the flexible shaft propeller to rotate in one direction, enabling the ship to move forward in the forward mode or backward in the reverse mode. When in the neutral state, since the rotating shaft 2 is separated from the first gear 3 and the second gear 4 to disconnect the power output, the flexible shaft propeller does not rotate.

[0041] In the present application, please refer to Figure 2 and Figure 3 As shown, a drive gear 22 is provided on the rotating shaft 2. The power device drives the drive gear 22 to rotate, and then the drive gear 22 drives the rotating shaft 2 to rotate.

[0042] Further, please refer to Figure 2 and Figure 3 As shown, the fork assembly 9 includes a sleeve 91 sleeved on the rotating shaft 2. A fork 92 is provided on the housing 1. In addition, the fork assembly 9 further includes a handle 93 mounted on the housing 1. In this way, when a gear shift is required, the handle 93 is rotated at this time. The handle 93 drives the fork 92 to move, and the fork 92 then drives the sleeve 91 to move towards the first gear 3 or the second gear 4. When it moves to a suitable position, the sleeve 91 is drivingly connected to the first gear 3 or the second gear 4, thereby realizing the gear shift. In this embodiment, the sleeve 91 rotates synchronously with the rotating shaft 2, and the sleeve 91 rotates relative to the fork 92.

[0043] Further, please refer to Figure 4 As shown, the fork assembly 9 further includes a limiting component 94 mounted in the housing 1. By providing the limiting component 94, it can be used to limit the sliding stroke of the fork 92, thereby improving the firm connection between the sleeve 91 and the first gear 3 or the second gear 4.

[0044] Further, please refer to Figure 4 As shown, the limit component 94 includes a limit block 941, which is fixedly installed in the housing 1. At least one limit groove 942 is provided on one side of the limit block 941 facing the fork 92. A steel ball 943 that abuts and slides against the limit block 941 is provided on the fork 92. The steel ball 943 can be used to snap into the limit groove 942 when the sleeve 91 is in transmission connection with the first gear 3 or the second gear 4, thereby ensuring the stable connection between the sleeve 91 and the first gear 3 or the second gear 4.

[0045] Further, please refer to Figure 5 As shown, the limit component 94 further includes an elastic member 944, which can be used to elastically push the steel ball 943. A receiving groove is formed on the fork 92, and the receiving groove can be used to receive the elastic member 944. By providing the elastic member 944, it can be ensured that the steel ball 943 continuously abuts against the limit block 941. When the steel ball 943 snaps into the limit groove 942, the elastic force of the elastic member 944 pushes the steel ball 943 to continuously snap into the limit groove 942, further enhancing the stable connection between the sleeve 91 and the first gear 3 or the second gear 4; by providing the receiving groove, the elastic member 944 can be better received therein. At the same time, it also guides the elastic member 944 to push the steel ball 943 along a specific direction, which is beneficial for the steel ball 943 to snap into the limit groove 942 better.

[0046] Preferably, the number of the limit grooves 942 is two, and the two limit grooves 942 are respectively used to fix the steel ball 943 in each limit groove 942 after the sleeve 91 is in transmission connection with the first gear 3 or the second gear 4.

[0047] Further, please refer to Figure 3 As shown, the sleeve 91 includes a sleeve body 911. A first boss 912 is provided on one side of the sleeve body 911. A first jack 31 is formed on the first gear 3, and the first boss 912 can be inserted into the first jack 31. In this way, when the sleeve body 911 moves to a suitable position and the first boss 912 is inserted into the first jack 31, the transmission connection between the sleeve 91 and the first gear 3 can be realized, and the gear shift can be realized.

[0048] Further, please refer to Figure 3 As shown, a second boss 913 is provided on the other side of the sleeve body 911. A second jack 41 is formed on the second gear 4. When the second boss 913 can be inserted into the second jack 41, the transmission connection between the sleeve 91 and the second gear 4 can be realized, and the gear shift can be realized.

[0049] Further, please refer to Figure 3As shown, a clamping groove 914 is provided on the sleeve body 911. By providing the clamping groove 914, the shift fork 92 can be snapped into it. In this way, in this embodiment, when in neutral, the shift fork 92 does not contact the clamping groove 914, and at this time, the sleeve 91 rotates relative to the shift fork 92; when shifting gears is required, at this time, the shift fork 92 moves to contact the clamping groove 914, and the shift fork 92 can push the sleeve body 911 to move, realizing the shift of gears.

[0050] Preferably, as shown in Figure 5 a spline 21 is provided on the rotating shaft 2, and a spline groove 95 that is in fit connection with the spline 21 is provided in the sleeve 91. By connecting the spline 95 with the spline groove 21, on the one hand, the sleeve 91 can be in transmission connection with the rotating shaft 2, and on the other hand, the sleeve 91 can slide along the spline 21, realizing the transmission connection between the sleeve 91 and the first gear 3 or the second gear 4, and realizing the shift of gears.

[0051] This embodiment also discloses an agricultural transmission case, including the outboard engine transmission case assembly as described above.

[0052] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An outboard motor gearbox assembly, characterized in that, Comprising: A housing; A rotating shaft rotatably installed in the housing for driving connection with an external power device; A first gear and a second gear spacedly sleeved on the rotating shaft, the rotating shaft rotating relative to the first gear and the second gear; A push shaft rotatably installed on the housing and arranged parallel to the rotating shaft for driving connection with a flexible shaft propeller; A third gear and a fourth gear spacedly sleeved on the push shaft, the first gear and the third gear being connected by a chain drive, the second gear and the fourth gear being meshed, and; A fork assembly slidably installed on the rotating shaft and distributed between the first gear and the second gear for driving connection between the rotating shaft and the first gear or the second gear.

2. The outboard engine gearbox assembly according to claim 1, characterized in that, The fork assembly includes a sleeve sleeved on the rotating shaft, a fork installed on the housing, and a handle for driving the fork to move axially along the rotating shaft so that the fork pushes the sleeve to move, the handle being installed on the housing.

3. The outboard engine transmission case assembly according to claim 2, wherein, The fork assembly further includes a limit assembly for limiting the sliding stroke of the fork, the limit assembly being installed in the housing.

4. The outboard engine gearbox assembly according to claim 3, characterized in that, The limit assembly includes a limit block fixedly arranged in the housing, at least one limit groove being provided on a side of the limit block facing the fork, a steel ball being provided on the fork for abutting and sliding with the limit block, the steel ball being configured to be snapped into the limit groove when the sleeve is in driving connection with the first gear or the second gear.

5. The outboard engine gearbox assembly according to claim 4, characterized in that, The limit assembly further includes an elastic member for elastically pushing the steel ball, and a receiving groove for receiving the elastic member being provided on the fork.

6. The outboard engine gearbox assembly according to claim 4, characterized in that, The number of the limit grooves is two.

7. The outboard engine gearbox assembly according to claim 2, characterized in that, The sleeve includes a sleeve body and a first boss provided on one side of the sleeve body, a first insertion hole for inserting the first boss being provided on the first gear.

8. The outboard engine gearbox assembly according to claim 7, characterized in that, A second boss is provided on the other side of the sleeve body, and a second insertion hole for inserting the second boss is provided on the second gear.

9. The outboard motor gearbox assembly according to claim 7, characterized in that, A card slot for receiving the fork is provided on the sleeve body.

10. An agricultural transmission case, characterized in that, Comprising an outboard engine transmission case assembly according to any one of claims 1 to 9.

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