A power take-off and harvester

Abstract

The application discloses a kind of transfer case and harvester, transfer case includes transfer case body, power input shaft, power output shaft and first oil stirring gear, power input shaft is rotatably installed in transfer case body, and one end of power input shaft extends to pass out of transfer case body and constitutes input power end, coaxially installed with input gear and clutch on power input shaft, and input gear is rotatably connected with power input shaft, power output shaft penetrates transfer case body and is rotatably connected with transfer case body, one end of power output shaft in transfer case body is drivenly connected with input gear by transmission member arranged in transfer case body, clutch is used to drive connection or remove drive connection between power input shaft and input gear, first oil stirring gear is coaxially fixedly connected with clutch, first oil stirring gear rotates with power input shaft to agitate lubricating oil in transfer case body, it is simple in structure, and the power input shaft can be well lubricated and cooled.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical transmission, and particularly relates to a transfer case and a harvester. BACKGROUND

[0002] At present, corn and wheat harvesting machines are mostly driven by front drives, and cannot work normally due to insufficient power in relatively muddy and other harsh environments. Some models are connected through a transfer case and rear drive axle, and the power of the whole vehicle is increased through four-wheel drive, which can effectively solve this problem, but new problems have appeared: 1. During high-speed driving, the rotation speed is too fast, the power input shaft of the transfer case is at a high position, the corresponding bearing is not sufficiently lubricated, and it generates a lot of heat; 2. The connection of the main transmission case and the transfer case is difficult due to limited space. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the present application is to provide a transfer case which is simple in structure, convenient to lubricate, and has a torque increasing function.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a transfer case, comprising a transfer case body, a power input shaft, a power output shaft and a first oil stirring gear, the power input shaft is rotatably installed in the transfer case body, and one end of the power input shaft extends out of the transfer case body and constitutes a power input end, an input gear and a clutch are coaxially installed on the power input shaft, and the input gear is rotatably connected with the power input shaft, the power output shaft penetrates through the transfer case body and is rotatably connected with the transfer case body, one end of the power output shaft located in the transfer case body is in transmission connection with the input gear through a transmission member arranged in the transfer case body, the clutch is used to connect or disconnect the transmission connection between the power input shaft and the input gear, one end of the power output shaft located outside the transfer case body is used to output power, and when the power input shaft drives the power output shaft to rotate, the rotation speed of the power output shaft is lower than that of the power input shaft, the first oil stirring gear is coaxially fixedly connected with the clutch, and the first oil stirring gear rotates with the power input shaft to stir the lubricating oil in the transfer case body.

[0005] The beneficial effects of the above technical scheme are that: since the horizontal height of the power input shaft is higher than that of the power output shaft, and the power input shaft is suspended on the lubricating oil liquid surface of the transfer case body, by adding the first oil stirring gear, the lubricating oil in the transfer case body can be stirred to lubricate and cool the bearings on the power input shaft (splash lubrication), and the rotation speed of the power input shaft is higher than that of the power output shaft, which makes the transfer case have a speed reduction and torque increasing effect, thereby improving the output torque of the power output end.

[0006] The parking brake is installed on one side of the transfer case body, and the other end of the power input shaft extends out of the transfer case body and is coaxially fixedly connected with the brake part of the parking brake.

[0007] The parking brake is installed on one side of the transfer case body, and the other end of the power input shaft extends out of the transfer case body and is coaxially fixedly connected with the brake part of the parking brake.

[0008] The parking brake is installed on one side of the transfer case body, and the other end of the power input shaft extends out of the transfer case body and is coaxially fixedly connected with the brake part of the parking brake.

[0009] The parking brake is installed on one side of the transfer case body, and the other end of the power input shaft extends out of the transfer case body and is coaxially fixedly connected with the brake part of the parking brake.

[0010] The parking brake is installed on one side of the transfer case body, and the other end of the power input shaft extends out of the transfer case body and is coaxially fixedly connected with the brake part of the parking brake.

[0011] The parking brake is installed on one side of the transfer case body, and the other end of the power input shaft extends out of the transfer case body and is coaxially fixedly connected with the brake part of the parking brake.

[0012] The transmission member includes a transmission shaft, a transmission gear and a first umbrella gear, the transmission shaft is rotatably installed in the transfer case body and located between the power input shaft and the power output shaft, the transmission shaft is parallel to the power input shaft, the transmission gear is coaxially fixedly installed on the transmission shaft and meshed with the input gear, and the first umbrella gear is coaxially fixedly installed on the transmission shaft.

[0013] The beneficial effect of the above technical solution is that the transmission member performs power transition between the power input shaft and the power output shaft.

[0014] The above technical solution further includes a second oil stirring gear, the second oil stirring gear is coaxially rotatably installed on the transmission shaft, and the second oil stirring gear is meshed with the first oil stirring gear, when the meshing sleeve slides in the axial direction under the action of external force, the first oil stirring gear always remains meshed with the second oil stirring gear, and the second oil stirring gear rotates with the first oil stirring gear to stir the lubricating oil in the transfer case body.

[0015] The beneficial effect of the above technical solution is that the lubrication and heat dissipation performance of the bearings on the power input shaft and the transmission shaft can be further improved.

[0016] The above technical solution includes two transmission shafts, i.e., a first transmission shaft and a second transmission shaft, and two transmission gears, i.e., a first transmission gear and a second transmission gear, the two transmission gears correspond to the two transmission shafts one by one, the two transmission shafts are distributed in the transfer case body and parallel to the power input shaft, the first transmission gear is coaxially fixedly installed on the first transmission shaft and meshed with the input gear, the second oil stirring gear is coaxially rotatably installed on the first transmission shaft and meshed with the first oil stirring gear, the second transmission gear is coaxially fixedly installed on the second transmission shaft and meshed with the first transmission gear, and the first umbrella gear is coaxially fixedly installed on the second transmission shaft.

[0017] The beneficial effect of the above technical solution is that the structure of the transfer case is more compact, and the diameter of the transmission gear is smaller, which is beneficial to reduce the height of the transfer case body.

[0018] The diameter of the first transmission gear is d1, the diameter of the input gear is d2, the diameter of the second transmission gear is d3, the diameter of the first umbrella gear is d4, and the diameter of the second umbrella gear is d5, wherein d1>d2>d3, and d5>d4.

[0019] The beneficial effect of the above technical solution is that the speed reduction transmission between the power output shaft and the power input shaft is realized.

[0020] In the above technical solution, d3:d2=0.96-0.98:1; and d5:d4=1.05-1.1:1.

[0021] The beneficial effect of the above technical solution is that the speed reduction transmission is realized, and the rotation speed of the power output shaft is slightly lower than the rotation speed of the power input shaft.

[0022] The second object of the present application is to provide a harvester comprising the transfer case as described above.

[0023] The beneficial effect of the above technical solution is that the harvester has good crossing performance, and the transfer case has good heat dissipation performance. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a sectional view of the transfer case described in Embodiment 1 of the present application.

[0025] Figure 2 It is a schematic diagram of the transmission in the transfer case described in Embodiment 1 of the present application.

[0026] Figure 3 It is a side view of the transfer case described in Embodiment 1 of the present application.

[0027] Figure 4 It is a schematic diagram of the distribution of the clutch on the power input shaft and the input gear in Embodiment 1 of the present application.

[0028] In the figure: 1 is a transfer case body, 2 is a power input shaft, 21 is an input gear, 22 is a clutch, 221 is an engagement sleeve, 222 is a first engagement tooth seat, 223 is a second engagement tooth seat, 3 is a power output shaft, 31 is a second umbrella gear, 4 is a first oil stirring gear, 5 is a transmission member, 51a is a first transmission shaft, 51b is a second transmission shaft, 52a is a first transmission gear, 52b is a second transmission gear, 53 is a first umbrella gear, 6 is a parking brake member, and 7 is a second oil stirring gear. DETAILED DESCRIPTION

[0029] The principles and features of the present application are described below in connection with the accompanying drawings, in which the examples are presented only to explain the present application and are not intended to limit the scope of the present application. The present application is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. The advantages and features of the present application will be more clearly described according to the following description and claims. It should be noted that the drawings are very simplified and use non-precise proportions, only for the purpose of facilitating, clarifying and assisting the description of the embodiments of the present application.

[0030] Embodiment 1

[0031] As shown in Figure 1 and Figure 2 , the embodiment provides a transfer case, comprising a transfer case housing 1, a power input shaft 2, a power output shaft 3 and a first oil stirring gear 4, the power input shaft 2 is rotatably installed in the transfer case housing 1, and one end of the power input shaft 2 extends out of the transfer case housing 1 and constitutes a power input end, an input gear 21 and a clutch 22 are coaxially installed on the power input shaft 2, and the input gear 21 is in rotational connection with the power input shaft 2, the power output shaft 3 penetrates the transfer case housing 1 and is in rotational connection with the transfer case housing 1, one end of the power output shaft 3 located in the transfer case housing 1 is in driving connection with the input gear 21 through a transmission member 5 provided in the transfer case housing 1, the clutch 22 is used to drive connect or disengage the power input shaft 2 and the input gear 21, one end of the power output shaft 3 located outside the transfer case housing 1 is used to output power, and when the power input shaft 2 drives the power output shaft 3 to rotate, the rotational speed of the power output shaft 3 is lower than that of the power input shaft 2, the first oil stirring gear 4 is coaxially fixedly connected with the clutch 22, the first oil stirring gear 4 rotates with the power input shaft 2 to stir the lubricating oil in the transfer case housing 1, since the horizontal height of the power input shaft is higher than that of the power output shaft, and the power input shaft is suspended on the lubricating oil surface of the transfer case housing, by adding the first oil stirring gear, the lubricating oil in the transfer case housing can be stirred to lubricate and cool the bearings on the power input shaft, and the rotational speed of the power input shaft is higher than that of the power output shaft, that is, the transfer case has the effect of reducing speed and increasing torque, thereby improving the output torque of the power output end.

[0032] The technical scheme further comprises a parking brake 6, which is installed on one side of the transfer case body 1, and the other end of the power input shaft 2 extends out of the transfer case body 1 and is coaxially fixedly connected with a brake part of the parking brake 6. Thus, when parking, the power input shaft is braked by the parking brake, thereby achieving parking brake of the whole vehicle. The parking brake is installed on the transfer case body, and the installation structure is compact (the distance between the transfer case and the main transmission case can be reduced, thereby making the structure more compact).

[0033] As shown in Figure 4 The clutch 22 comprises a meshing sleeve 221, a first meshing tooth seat 222 and a second meshing tooth seat 223. The second meshing tooth seat 223 is coaxially fixedly installed on the input gear 21. The first meshing tooth seat 222 is coaxially fixedly installed on the power input shaft 2. The first meshing tooth seat 222 and the second meshing tooth seat 223 are close to each other. The meshing sleeve 221 is coaxially and slidably sleeved on the first meshing tooth seat 222 and is in meshing connection with the first meshing tooth seat 222. The meshing sleeve 221 can slide axially to be close to the second meshing tooth seat 223 under the action of external force, so as to drive-connect the first meshing tooth seat 222 and the second meshing tooth seat 223 through the meshing sleeve 221. Or the meshing sleeve 221 can slide axially to reset, so as to disconnect the drive connection between the first meshing tooth seat 222 and the second meshing tooth seat 223. The first oil stirring gear 4 is coaxially and fixedly installed on one side of the meshing sleeve 221 close to the input gear 21. The diameter of the first oil stirring gear 4 is greater than that of the meshing sleeve 221. The structure is simple. When the meshing sleeve slides to be close to the second meshing tooth seat, the two sides of the meshing sleeve are in meshing connection with the first meshing tooth seat and the second meshing tooth seat respectively, so as to realize the drive connection between the power input shaft and the input gear. At this time, the input gear rotates synchronously with the power input shaft. When the meshing sleeve slides to be completely sleeved on the first meshing tooth seat, the meshing sleeve is separated from the second meshing tooth seat, so that the clutch is in the disengaged state. At this time, the input gear does not rotate with the power input shaft. The first meshing tooth seat 222 and the second meshing tooth seat 223 are both gear-shaped, and the diameters of the two are consistent (and the number of teeth is consistent). The inner hole of the meshing sleeve is gear-shaped, and the meshing sleeve is in cooperation with the first meshing tooth seat 222 and the second meshing tooth seat 223.

[0034] The power input shaft 2 and the power output shaft 3 are perpendicular to each other in the technical scheme. The transmission member 5 is located between the power input shaft 2 and the power output shaft 3, so that it meets the power transmission direction requirement of the vehicle body.

[0035] The transmission member 5 comprises a transmission shaft, a transmission gear and a first umbrella gear 53, the transmission shaft is rotatably installed in the transfer case body 1 and located between the power input shaft 2 and the power output shaft 3, the transmission shaft is parallel to the power input shaft 2, the transmission gear is coaxially fixedly installed on the transmission shaft and meshed with the input gear 21, the first umbrella gear 53 is coaxially fixedly installed on the transmission shaft, one end of the power output shaft 3 located in the transfer case body 1 is coaxially fixedly installed with a second umbrella gear 31, and the first umbrella gear 53 is meshed with the second umbrella gear 31, so that the transmission member performs power transition between the power input shaft and the power output shaft.

[0036] The above technical solution further comprises a second oil stirring gear 7, which is coaxially rotatably installed on the transmission shaft, and the second oil stirring gear 7 is meshed with the first oil stirring gear 4, when the engagement sleeve 221 slides axially under the action of external force, the first oil stirring gear 4 always remains meshed with the second oil stirring gear 7, the second oil stirring gear 7 rotates with the first oil stirring gear 4 to stir the lubricating oil in the transfer case body 1 (in this way, splash lubrication can be formed in the transfer case body, that is, the transmission members above the lubricating oil level are lubricated), so that the lubrication and heat dissipation performance of the bearings on the power input shaft and the transmission shaft can be further improved.

[0037] The above technical solution comprises two transmission shafts, namely a first transmission shaft 51a and a second transmission shaft 51b, and two transmission gears, namely a first transmission gear 52a and a second transmission gear 52b, two transmission gears correspond to two transmission shafts, two transmission shafts are distributed in the transfer case body 1 and parallel to the power input shaft 2, the first transmission gear 52a is coaxially fixedly installed on the first transmission shaft 51a and meshed with the input gear 21, the second oil stirring gear 7 is coaxially rotatably installed on the first transmission shaft 51a and meshed with the first oil stirring gear 4, the second transmission gear 52b is coaxially fixedly installed on the second transmission shaft 51b and meshed with the first transmission gear 52a, and the first umbrella gear 53 is coaxially fixedly installed on the second transmission shaft 51b, so that the structure of the transfer case is more compact, and the diameter of the transmission gear is smaller, which is beneficial to reducing the height of the transfer case body.

[0038] The diameter of the first transmission gear 52a is d1, the diameter of the input gear 21 is d2, the diameter of the second transmission gear 52b is d3, the diameter of the first umbrella gear 53 is d4, and the diameter of the second umbrella gear is d5, wherein d1>d2>d3, and d5>d4, so that the speed reduction transmission between the power output shaft and the power input shaft can be realized. The diameter of the first transmission gear is slightly larger than the diameter of the input gear.

[0039] In the above technical solution, d3:d2=0.96-0.98:1, preferably d3:d2=0.96:1; d5:d4=1.05-1.1:1, preferably d5:d4=1.06:1, which can realize speed reduction transmission and make the rotation speed of the power output shaft slightly lower than the rotation speed of the power input shaft.

[0040] As shown in Figure 3 Preferably, the horizontal height of the power output shaft and the two transmission shafts can be consistent, and the horizontal height of the power input shaft and the horizontal height of the transmission shaft.

[0041] The lower end of the first oil stirring gear is partially immersed in the lubricating oil in the transfer case body.

[0042] In the embodiment, the clutch adopts a shift fork type clutch, which can flexibly select whether to output and transmit torque from the transfer case, so as to realize the switching of two-wheel drive and four-wheel drive. After high-speed gear driving or normal road condition cut-off, the driving transmission is switched to front drive mode, which can effectively reduce the failure rate. In the driving in the muddy field operation and other harsh conditions, it can be switched to four-wheel drive mode.

[0043] Embodiment 2

[0044] The embodiment provides a harvester comprising the transfer case as described in embodiment 1, which has good crossing performance and good heat dissipation performance of the transfer case.

[0045] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any ordinary skilled person in the industry can easily implement the present application according to the drawings and the above description; however, any equivalent changes, modifications and evolution made by those skilled in the art without departing from the scope of the technical solution of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application are still within the protection scope of the technical solution of the present application.

Claims

1. A transfer case, characterized in that, The transfer case includes a transfer case housing (1), a power input shaft (2), a power output shaft (3), and a first churning gear (4). The power input shaft (2) is rotatably mounted inside the transfer case housing (1), and one end of the power input shaft (2) extends out of the transfer case housing (1) to form an input power end. An input gear (21) and a clutch (22) are coaxially mounted on the power input shaft (2), and the input gear (21) is rotatably connected to the power input shaft (2). The power output shaft (3) passes through the transfer case housing (1) and is rotatably connected to the transfer case housing (1). One end of the power output shaft (3) located inside the transfer case housing (1) is connected to the input gear. (21) The transmission is connected by a transmission component (5) located in the transfer case housing (1). The clutch component (22) is used to connect or disconnect the power input shaft (2) from the input gear (21). The power output shaft (3) is located at one end outside the transfer case housing (1) to output power. When the power input shaft (2) drives the power output shaft (3) to rotate, the speed of the power output shaft (3) is lower than the speed of the power input shaft (2). The first oil stirring gear (4) is coaxially fixedly connected to the clutch component (22). The first oil stirring gear (4) rotates with the power input shaft (2) to stir the lubricating oil in the transfer case housing (1). The clutch component (22) includes a meshing sleeve (221), a first meshing gear seat (222), and a second meshing gear seat (223). The second meshing gear seat (223) is coaxially fixedly mounted on the input gear (21), and the first meshing gear seat (222) is coaxially fixedly mounted on the power input shaft (2). The first meshing gear seat (222) and the second meshing gear seat (223) are close to each other. The meshing sleeve (221) is coaxially slidably sleeved on the first meshing gear seat (222) and meshes with the first meshing gear seat (222). The meshing sleeve (221) is subjected to external force. Under the action of the action, it can slide axially to be close to the second meshing tooth seat (223) so as to connect the first meshing tooth seat (222) and the second meshing tooth seat (223) through the meshing sleeve (221) for transmission. Or the meshing sleeve (221) can slide axially to be reset under the action of external force so as to release the transmission connection between the first meshing tooth seat (222) and the second meshing tooth seat (223). The first oil stirring gear (4) is coaxially fixedly installed on the side of the meshing sleeve (221) close to the input gear (21), and the diameter of the first oil stirring gear (4) is larger than the diameter of the meshing sleeve (221).

2. The transfer case according to claim 1, characterized in that, It also includes a parking brake (6), which is installed on one side outside the transfer case housing (1), and the other end of the power input shaft (2) extends out of the transfer case housing (1) and is coaxially fixedly connected to the braking part of the parking brake (6).

3. The transfer case according to claim 1 or 2, characterized in that, The power input shaft (2) is perpendicular to the power output shaft (3), and the transmission component (5) is located between the power input shaft (2) and the power output shaft (3).

4. The transfer case according to claim 3, characterized in that, The transmission component (5) includes a transmission shaft, a transmission gear and a first bevel gear (53). The transmission shaft is rotatably installed inside the transfer case housing (1) and located between the power input shaft (2) and the power output shaft (3). The transmission shaft is parallel to the power input shaft (2), and the transmission gear is coaxially fixedly installed on the transmission shaft and meshes with the input gear (21). The first bevel gear (53) is coaxially fixedly installed on the transmission shaft. A second bevel gear (31) is coaxially fixedly installed at one end of the power output shaft (3) inside the transfer case housing (1), and the first bevel gear (53) meshes with the second bevel gear (31).

5. The transfer case according to claim 4, characterized in that, It also includes a second oil stirring gear (7), which is coaxially mounted on the transmission shaft and meshes with the first oil stirring gear (4). When the meshing sleeve (221) slides axially under the action of external force, the first oil stirring gear (4) always remains meshed with the second oil stirring gear (7). The second oil stirring gear (7) rotates with the first oil stirring gear (4) to stir the lubricating oil in the transfer case housing (1).

6. The transfer case according to claim 5, characterized in that, The transmission shaft is provided with two shafts, namely the first transmission shaft (51a) and the second transmission shaft (51b). The transmission gear is provided with two gears, namely the first transmission gear (52a) and the second transmission gear (52b). The two transmission gears correspond one-to-one with the two transmission shafts. The two transmission shafts are distributed at intervals in the transfer case housing (1) and are parallel to the power input shaft (2). The first transmission gear (52a) is coaxially fixedly mounted on the first transmission shaft (51a) and meshes with the input gear (21). The second oil stirring gear (7) is coaxially rotatably mounted on the first transmission shaft (51a) and meshes with the first oil stirring gear (4). The second transmission gear (52b) is coaxially fixedly mounted on the second transmission shaft (51b) and meshes with the first transmission gear (52a). The first bevel gear (53) is coaxially fixedly mounted on the second transmission shaft (51b).

7. The transfer case according to claim 6, characterized in that, The diameter of the first transmission gear (52a) is d1, the diameter of the input gear (21) is d2, the diameter of the second transmission gear (52b) is d3, the diameter of the first bevel gear (53) is d4, and the diameter of the second bevel gear is d5, wherein d1>d2>d3 and d5>d4.

8. The transfer case according to claim 7, characterized in that, d3:d2=0.96-0.98:1; d5:d4=1.05-1.1:

1.

9. A harvester, characterized in that, Includes the transfer case as described in any one of claims 1-8.

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