Transmission mechanism of tractor clutch

Abstract

The utility model relates to the technical field of tractor power mechanisms, in particular to a transmission mechanism of a tractor clutch. Comprising a transmission shaft, a first joint gear and a second joint gear, the first joint gear and the second joint gear are mounted on the transmission shaft, the front end of the transmission shaft is in transmission connection with a clutch disc and provided with a front end spline used for being connected with the clutch disc, and the middle section is provided with a first joint gear spline; the first joint gear is installed on the transmission shaft through a first joint gear spline, the rear end of the transmission shaft is rotatably sleeved with a gearbox I shaft, the gearbox I shaft and the transmission shaft are coaxially arranged, and a second joint gear spline is arranged at the front end of the gearbox I shaft. The second joint gear is rotatably installed at the front end of the gearbox I shaft through a bearing, a joint sleeve assembly is installed on a spline of the second joint gear, and the joint sleeve assembly is used for being connected with the first joint gear and the second joint gear. The transmission mechanism is reasonable in structure, the concentricity of the clutch transmission shaft is high, and shaft breakage accidents of the clutch transmission shaft during heavy load can be effectively avoided and reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor power mechanisms, and specifically relates to a transmission mechanism of a tractor clutch. Background Art

[0002] The function of a tractor clutch is to transmit the power of a diesel engine to a gearbox and cut off the power output when needed. That is to say, the clutch is located between the engine and the gearbox. The transmission shaft of the clutch can transmit the power of the diesel engine to the gearbox in a switching manner and also to the power output shaft of the tractor, ensuring smooth operation of the tractor during startup, driving, and parking and providing power output for the suspension device. The transmission shaft of the clutch is two split shafts arranged coaxially, and has high requirements for concentricity during installation. In addition, the clutch and the rear power output of the tractor are respectively located on the front and rear sides of the tractor. The transmission path of the clutch transmission shaft is long, and it is difficult to ensure the concentricity of the split transmission shaft; moreover, the working environment of the tractor is harsh and the load is large. During use, the transmission bearing of the clutch bears a large torque and is prone to fracture. Chinese Patent No. 201920062207X discloses "A Rear-mounted Power Output Device for a Tractor Clutch", and the authorization announcement number is CN209336493U. In this rear-mounted power output device, an input shaft, a connecting shaft, and an output shaft are rotatably connected between the inner walls of a box body. The connecting shaft is located between the input shaft and the output shaft. A wet clutch is installed on the outer wall of the box body. A driving gear is sleeved on the input shaft. A transmission gear meshing with the driving gear is sleeved on the connecting shaft. A first gear and a second gear are sleeved on the connecting shaft. A low-gear driven gear meshing with the first gear and a high-gear driven gear meshing with the second gear are loosely sleeved on the output shaft. A sliding ring is sleeved on the output shaft. By installing the wet clutch on the box body, the utility model overcomes the drawback that the waist must be broken during the maintenance of the front-mounted and mid-mounted power output clutches of traditional tractors. During maintenance, the wet clutch can be removed from the rear side, saving labor, time, and effort. However, as mentioned above, since the clutch and the rear power output of the tractor are respectively located on the front and rear sides of the tractor, the transmission route of the clutch transmission shaft is long, it is difficult to ensure the concentricity of the split output shaft, and faults such as shaft breakage are likely to occur during use. Summary of the Utility Model

[0003] The utility model provides a transmission mechanism of a tractor clutch with reasonable structure and high concentricity of the transmission shaft, effectively reducing the occurrence of shaft breakage accidents.

[0004] The technical solution adopted by the utility model to solve the technical problem is:

[0005] The transmission mechanism of a tractor clutch described in the present utility model includes a transmission shaft, a first engaging gear and a second engaging gear mounted on the transmission shaft. The front end of the transmission shaft is in transmission connection with a clutch disc. The front end of the transmission shaft is provided with a front spline for connecting the clutch disc, and the middle section is provided with a first engaging gear spline. The first engaging gear is mounted on the transmission shaft through the first engaging gear spline. The rear end of the transmission shaft is rotatably sleeved with a transmission gearbox I shaft. The transmission gearbox I shaft is coaxially arranged with the transmission shaft. The front end of the transmission gearbox I shaft is provided with a second engaging gear spline. The second engaging gear is rotatably mounted at the front end of the transmission gearbox I shaft through a bearing. A sleeve assembly is mounted on the second engaging gear spline. When the sleeve assembly engages with the second engaging gear, the second engaging gear rotates synchronously with the transmission gearbox I shaft. When the sleeve assembly releases the second engaging gear and engages with the first engaging gear, the transmission gearbox I shaft rotates synchronously with the transmission shaft.

[0006] With this solution, the clutch drive shafts on both sides of the sleeve assembly are of an integrated structure, with reasonable structure and good concentricity, which can effectively avoid and reduce the occurrence of shaft breakage accidents.

[0007] Preferably, the sleeve assembly is located between the first engaging gear and the second engaging gear. The sleeve assembly includes a sleeve core mounted on the second engaging gear spline and a sliding sleeve sleeved on the sleeve core. The outer wall of the sleeve core is provided with an external spline, and the inner wall of the sliding sleeve is provided with an internal spline adapted to the external spline. On one side of the first engaging gear and the second engaging gear facing the sleeve assembly, there is fixedly connected an engaging spline shaft adapted to the internal spline on the sliding sleeve.

[0008] With this solution, the sleeve assembly can engage with the first engaging gear or the second engaging gear respectively as required and transmit torque.

[0009] Preferably, the first engaging gear is constantly meshed with a double gear mounted on the differential input shaft, and the double gear is in transmission connection with the second engaging gear through an intermediate gear.

[0010] With this solution, power can be transmitted to the differential input shaft through the first engaging gear, thereby driving the differential to operate.

[0011] Preferably, the middle section of the transmission gearbox I shaft is provided with an I shaft spline for mounting transmission gears. The rear end of the transmission shaft is in transmission connection with the rear power output shaft of the tractor through a coupling.

[0012] With this solution, power can be transmitted to the transmission through the transmission gearbox I shaft and to the rear power output shaft through the coupling.

[0013] Preferably, the transmission shaft is of an integrated structure.

[0014] Through this solution, the concentricity of the transmission shaft can be guaranteed, the power transmission efficiency can be improved, and the failure rate of shaft breakage can be reduced.

[0015] Due to the adoption of the above structure, the transmission mechanism has a reasonable structure, a high concentricity of the clutch transmission shaft, and can effectively avoid and reduce the shaft breakage accidents of the clutch transmission shaft under large loads. Description of the Drawings

[0016] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the present utility model.

[0017] Figure 2 It is a schematic three-dimensional structure diagram of the transmission shaft.

[0018] Figure 3 It is a schematic three-dimensional structure diagram of the transmission shaft I of the gearbox.

[0019] Figure 4 Schematic three-dimensional structure diagram of the engaging sleeve assembly.

[0020] Figure 5 It is a schematic three-dimensional structure diagram of the first engaging gear.

[0021] Figure 6 It is a schematic three-dimensional structure diagram of an embodiment of the present utility model. Detailed Description of the Preferred Embodiments

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings. The same reference numerals are used for the same components. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions away from the geometric center of the specific component respectively.

[0023] As Figure 1 shown, the transmission mechanism of a tractor clutch according to the present utility model includes a transmission shaft 3, a first engaging gear 1 and a second engaging gear 2 mounted on the transmission shaft 3. The front end of the transmission shaft 3 is in transmission connection with the clutch disc. When the clutch is engaged, the power of the engine can be transmitted to the transmission shaft 3 through the clutch disc and then transmitted backward through the transmission shaft 3.

[0024] As Figure 2 shown, the transmission shaft 3 is an integral structure with high structural strength and concentricity. The front end of the transmission shaft 3 is provided with a front spline 31 for connecting the clutch disc, and the middle section is provided with a first engaging gear spline 32. A clutch disc mounting seat 33 is mounted on the front spline 31. During use, the clutch disc can be fixedly mounted on the clutch disc mounting seat 33 by rivets.

[0025] The first engaging gear 1 is mounted on the transmission shaft 3 through the first engaging gear spline 32, enabling the first engaging gear 1 to rotate synchronously with the transmission shaft 3. The rear end of the transmission shaft 3 is rotatably sleeved with the transmission case I shaft 4. As Figure 3 shown, the circular tubular transmission case I shaft 4 is coaxially arranged with the transmission shaft 3, and the two are connected by bearings or sliding sleeves, so that the transmission case I shaft 4 does not rotate with the transmission shaft 3. The front end of the transmission case I shaft 4 is provided with a second engaging gear spline 41. The second engaging gear 2 is rotatably mounted at the front end of the transmission case I shaft 4 through a bearing, enabling the second engaging gear 2 to rotate freely relative to the transmission case I shaft 4; an engaging sleeve assembly is mounted on the second engaging gear spline 41. When the engaging sleeve assembly engages with the second engaging gear 2, the second engaging gear 2 rotates synchronously with the transmission case I shaft 4. When the engaging sleeve assembly releases the second engaging gear 2 and engages with the first engaging gear 1, the transmission case I shaft 4 rotates synchronously with the transmission shaft 3.

[0026] The engaging sleeve assembly is located between the first engaging gear 1 and the second engaging gear 2, and can engage with the first engaging gear 1 forward and with the second engaging gear 2 backward.

[0027] As Figure 4 shown, the engaging sleeve assembly includes an engaging sleeve core 5 mounted on the second engaging gear spline 41 and a sliding sleeve 6 sleeved on the engaging sleeve core 5. The engaging sleeve core 5 is mounted on the second engaging gear spline 41 through an internal spline and rotates synchronously with the transmission case I shaft 4. External splines are provided on the outer wall of the engaging sleeve core 5, and internal splines adapted to the external splines of the engaging sleeve core 5 are provided on the inner wall of the sliding sleeve 6, enabling the sliding sleeve 6 to rotate synchronously with the engaging sleeve core 5 while also being able to axially move on the engaging sleeve core 5; fork grooves are provided on the outer wall of the sliding sleeve 6, and the sliding sleeve 6 can be axially moved by using a fork during use. As Figure 4 shown, engaging spline shafts 11 adapted to the internal splines on the sliding sleeve 6 are fixedly connected to one side of the first engaging gear 1 and the second engaging gear 2 facing the engaging sleeve assembly. When the sliding sleeve 6 axially slides forward a certain distance on the engaging sleeve core 5, the front end of the sliding sleeve 6 engages with the engaging spline shaft 11 on the first engaging gear 1, enabling the sliding sleeve 6 to rotate synchronously with the first engaging gear 1. The sliding sleeve 6 drives the engaging sleeve core 5 to rotate synchronously, and the engaging sleeve core 5 drives the transmission case I shaft 4 to rotate synchronously through the second engaging gear spline 41. Conversely, when the sliding sleeve 6 axially slides backward a certain distance on the engaging sleeve core 5, the sliding sleeve 6 disengages from the first engaging gear 1, and the rear end of the sliding sleeve 6 will engage with the engaging spline shaft on the second engaging gear 2 and be driven by the second engaging gear 2 to rotate with the second engaging gear 2.

[0028] As Figure 1 、 Figure 6As shown in the figure, the first engaging gear 1 is constantly meshed with the double gear 8 mounted on the differential input shaft 7. The double gear 8 is drivingly connected to the second engaging gear 2 through an intermediate gear 81. When the first engaging gear 1 rotates with the transmission shaft 3, the double gear 8 constantly meshed with the first engaging gear 1 always drives the differential input shaft 7 to rotate, thereby driving the differential to operate. When the sliding sleeve 6 slides forward and engages with the first engaging gear 1, the intermediate gear 81 meshed with the double gear 8 drives the second engaging gear 2 to rotate idly. Since the second engaging gear 2 is mounted on the transmission shaft I 4 through a bearing, the idle rotation of the second engaging gear 2 at this time does not affect the transmission shaft I 4. When the sliding sleeve 6 slides forward and engages with the second engaging gear 2, the intermediate gear 81 meshed with the double gear 8 still drives the second engaging gear 2 to rotate. However, at this time, the second engaging gear 2 can drive the engaging sleeve core 5 to rotate through the sliding sleeve 6, and then drive the transmission shaft I 4 to rotate through the engaging sleeve core 5, so that the reverse rotation of the transmission shaft I 4 can be achieved.

[0029] In addition, as Figure 1 , Figure 3 shown, a spline I 42 for mounting the transmission gear 9 is provided in the middle section of the transmission shaft I 4. Different speed ratios are achieved through different combinations of the transmission gear 9 on the transmission shaft I 4 and other transmission gears. The rear end of the transmission shaft 3 is drivingly connected to the rear power output shaft 91 of the tractor through a coupling, so as to transmit the power of the transmission shaft 3 to the rear power output terminal at the rear end of the tractor.

[0030] Although some specific embodiments of the present invention have been described in detail above by way of examples, those skilled in the art should understand that the above examples are only for the purpose of illustration and not for the purpose of limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A transmission mechanism of a tractor clutch, comprising a transmission shaft (3), a first engaging gear (1) and a second engaging gear (2) mounted on the transmission shaft (3), wherein the front end of the transmission shaft (3) is in transmission connection with a clutch disc, and is characterized in that: At the front end of the transmission shaft (3), there is a front spline (31) for connecting the clutch disc, and at the middle section, there is a first engaging gear spline (32). The first engaging gear (1) is installed on the transmission shaft (3) through the first engaging gear spline (32). The rear end of the transmission shaft (3) is rotatably sleeved with the transmission first shaft (4). The transmission first shaft (4) is coaxially arranged with the transmission shaft (3). At the front end of the transmission first shaft (4), there is a second engaging gear spline (41). The second engaging gear (2) is rotatably installed at the front end of the transmission first shaft (4) through a bearing. A sleeve assembly is installed on the second engaging gear spline (41). When the sleeve assembly engages with the second engaging gear (2), the second engaging gear (2) rotates synchronously with the transmission first shaft (4). When the sleeve assembly releases the second engaging gear (2) and engages with the first engaging gear (1), the transmission first shaft (4) rotates synchronously with the transmission shaft (3).

2. The transmission mechanism of a tractor clutch according to claim 1, characterized in that: The sleeve assembly is located between the first engaging gear (1) and the second engaging gear (2). The sleeve assembly includes a sleeve core (5) installed on the second engaging gear spline (41) and a sliding sleeve (6) sleeved on the sleeve core (5). External splines are provided on the outer wall of the sleeve core (5), and internal splines adapted to the external splines are provided on the inner wall of the sliding sleeve (6). On one side of the first engaging gear (1) and the second engaging gear (2) facing the sleeve assembly, engaging spline shafts (11) adapted to the internal splines on the sliding sleeve (6) are fixedly connected respectively.

3. The transmission mechanism of a tractor clutch according to claim 1 or 2, characterized in that: The first engaging gear (1) is constantly meshed with a double gear (8) installed on the differential input shaft (7), and the double gear (8) is drivingly connected to the second engaging gear (2) through an intermediate gear.

4. The transmission mechanism of a tractor clutch according to claim 1 or 2, characterized in that: At the middle section of the transmission first shaft (4), there is a first shaft spline (42) for installing transmission gears. The rear end of the transmission shaft (3) is drivingly connected to the rear power output shaft (91) of the tractor through a coupling.

5. The transmission mechanism of a tractor clutch according to claim 1 or 2, characterized in that: The transmission shaft (3) is of an integral structure.

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