CN201736806U - Directly connected-type small wheel tractor transmission with 6+2 gears - Google Patents

Abstract

The utility model discloses a directly connected-type small wheel tractor transmission with 6+2 gears. The transmission comprises a traverse gear box, a clutch housing assembly and a rear power output device, wherein the traverse gear box comprises a gear box body and a first gear system arranged in the gear box body, wherein the first gear system comprises a longitudinal hollow shaft assembly and a bevel gear pair, and a plurality of gear box transverse middle shafts and a plurality of pairs of gear pairs, which are arranged in the gear box body; the clutch housing assembly comprises a clutch housing and a second gear system longitudinally arranged in the clutch housing; the gear box body is fixedly connected with the clutch housing; the rear power output device comprises a longitudinal transmission shaft, a middle transmission shaft, a rear power output shaft and a rear power output control mechanism which are longitudinally arranged in the gear box body and the clutch housing. The transmission is compact in structure, small in volume, small in diesel engine power loss and high in transmission efficiency.

Description

6+2 gears direct-coupled transmission device for small four-wheel tractors

technical field

The utility model relates to the technical field of tractor transmission devices, in particular to a direct-connected small four-wheel tractor transmission device suitable for 6+2 gears of tractors below 25 horsepower.

Background technique

At present, most of the direct-coupled four-wheel tractors with more than 25 horsepower produced in our country adopt longitudinal gearboxes, have no side power output, and the price is relatively high; the direct-coupled small four-wheel tractors with less than 25 horsepower are reasonable in price. The demand for it is becoming more and more prominent. Most of the small four-wheel tractors are driven by belts, the transmission efficiency is low, they are easy to slip when working under heavy loads, and the power increase is limited. The existing direct-coupled small four-wheel transmission is unreasonable in structure and poor in performance, especially the poor power output strength of the rear and easy out-of-gear, which cannot meet the high-performance needs of users.

Utility model content

The technical problem to be solved by the utility model is to provide a small four-wheel tractor gearbox production line with compact structure, small diesel engine power loss, good performance, suitable for tractors below 25 horsepower and can make full use of the existing technology. The 6+2-gear direct-coupled small four-wheel tractor transmission that can effectively save resources.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: the transmission device of the direct-connected small four-wheel tractor with 6+2 gears, including a horizontal gearbox, and the horizontal gearbox includes a gearbox box and is arranged on The first gear transmission device used to drive the half shaft of the tractor to rotate in the gearbox case, the first gear transmission device includes a longitudinal hollow shaft joint, a bevel gear pair and a plurality of Transverse intermediate shaft of the gearbox and multiple pairs of gear pairs; clutch housing assembly, the clutch housing assembly includes a clutch housing and a clutch housing longitudinally arranged in the clutch housing for transmitting the power of the engine to the horizontal gearbox The second gear transmission device; the gearbox case is fixedly connected with the clutch housing; the rear power output device, the rear power output device includes a longitudinal drive shaft arranged longitudinally in the gearbox case and the clutch housing, Intermediate drive shaft, rear PTO shaft, rear PTO control mechanism.

As a preferred technical solution, the first gear transmission device further includes a differential, the differential device is arranged in the gearbox case and is located at the transmission end of the first gear transmission device, and is used to transfer the The power is transmitted to the two half shafts that drive the wheels of the tractor.

As an improvement to the above technical solution, the second gear transmission device includes the I shaft of the clutch housing assembly, the slip gear and the II shaft of the clutch housing assembly. The I shaft of the clutch housing assembly is connected with the engine through a clutch, and the power input driving gear is installed on the I shaft of the clutch housing assembly; , a shift fork, and a locking steel ball control the slipping position of the sliding gear; an intermediate gear and a double gear are installed on the shaft of the clutch housing assembly II, and the intermediate gear and the clutch housing assembly I The power input drive gear on the shaft meshes; the large gear of the double gear meshes with the pinion of the slip gear installed at the front end of the hollow shaft joint.

As an improvement to the above technical solution, the gearbox is also provided with a rear power output device, the rear power output device includes a longitudinal drive shaft arranged longitudinally in the gearbox case and clutch housing, the longitudinal drive shaft The front end of the shaft passes through the hollow shaft joint and is connected with the power input drive gear installed on the I shaft of the clutch housing assembly through an involute spline connection, and the rear end of the longitudinal transmission shaft is connected with the intermediate transmission shaft through a sliding engagement sleeve. Connection; the intermediate transmission shaft, the front end of the intermediate transmission shaft is equipped with a meshing sleeve, which is connected to the rear end of the longitudinal transmission shaft through a sliding meshing sleeve, and the rear end is equipped with a rear power output driving gear; the rear power output shaft, the rear power output shaft The output shaft is installed at the rear of the gearbox case, and one end of the rear power output shaft located in the gearbox case is equipped with a rear power output driven gear, and the rear power output driven gear is connected to the rear The power output driving gear is meshed; the rear power output control mechanism is used to control the engaging or separating of the engaging sleeve and the rear end of the longitudinal transmission shaft.

As an improvement to the above technical solution, a side power output port is provided on the left side of the gearbox.

As an improvement to the above technical solution, the left end of the first bevel gear shaft of the gearbox extends out of the gearbox case to form the side power output port.

Due to the adoption of the above-mentioned technical scheme, the 6+2 gear direct-coupled small four-wheel tractor transmission device includes a transverse gearbox, and the transverse gearbox includes a gearbox case and a transmission box arranged in the gearbox case. The first gear transmission device used to drive the rotation of the tractor half shaft, the first gear transmission device includes a longitudinal hollow shaft assembly and a bevel gear pair arranged in the gearbox case, multiple gearbox transverse intermediate shafts and multiple For the gear pair; the clutch housing assembly, the clutch housing assembly includes a clutch housing and a second gear transmission device longitudinally arranged in the clutch housing for transmitting the power of the engine to the transverse gearbox; The gearbox case is fixedly connected with the clutch housing; the rear power output device, the rear power output device includes a longitudinal transmission shaft arranged longitudinally in the transmission case and the clutch housing, an intermediate transmission shaft, and a rear power output Shaft, rear power output control mechanism; the entire transmission device is compact in structure, small in size, low in power loss of the diesel engine, and high in transmission efficiency; the utility model is a further improvement made on the basis of the existing small four-wheel tractor gearbox. Some small four-wheel tractor gearbox processing production lines can be fully utilized to avoid wasting resources and effectively ensure good process inheritance.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is A-A direction sectional view among Fig. 1;

Fig. 3 is B-B direction sectional view in Fig. 1;

In the figure: 1-clutch housing; 2-clutch housing assembly I shaft; 3-clutch housing assembly II shaft; 4-intermediate gear; 5-duplex gear; 6-round nut; 7-power output shaft cover; 8-rear power output shaft; 9-rear power output driven gear; 10-intermediate transmission shaft; 11-rear power output driving gear; 12-slip engagement sleeve; 13-longitudinal transmission shaft; 14-slip gear; 15 -Locking steel ball; 16-Auxiliary gear shift mechanism; 17-Fork; 19-Power input drive gear; 20-Transmission II shaft; 21-II, V gear; 22-IV, VI gear; 23- Gearbox III shaft; 24-I, III gear drive gear; 25-gearbox IV shaft; 26-I, III, IV, VI gear slip gear; 27-gearbox V shaft; 28-differential; 29- Gear box; 30-reduction gear; 31-II, V reverse slip gear; 32-passive gear; 33-constantly meshed passive gear; 34-driving gear; 35-reverse driving gear; 36-driving cone Gear; 37-the first bevel gear shaft of the gearbox; 38-side PTO shaft cover; 39-adjusting gasket; 40-constantly meshed driving gear; 41-hollow shaft assembly;

Detailed ways

For ease of description, the direction parallel to the tractor's traveling direction is defined as the longitudinal direction, and the direction perpendicular to the tractor's traveling direction is defined as the transverse direction.

As shown in Figure 1, Figure 2 and Figure 3, the direct-coupled small four-wheel tractor transmission device with 6+2 gears includes a horizontal gearbox, and the horizontal gearbox includes a gearbox case 29 and is arranged laterally on The first gear transmission device used to drive the tractor half shaft to rotate in the gearbox case 29, the first gear transmission device includes a longitudinal hollow shaft joint 41 horizontally arranged in the gearbox case 29 and Bevel gear pair and multiple gearbox transverse intermediate shafts and multiple pairs of gear pairs; clutch housing assembly, which includes a clutch housing 1 and a clutch housing 1 longitudinally arranged in the clutch housing 1 for connecting the engine The power is transmitted to the second gear transmission of the transverse gearbox; the gearbox case 29 and the clutch housing 1 are fixedly connected together by bolts. Since the front end of the horizontal gearbox is fixedly connected with a clutch housing assembly, the clutch housing assembly moves the small and large gears of the sliding gear 14 to the large and small gears of the dual gear 5 through the auxiliary transmission control mechanism 16. The gears are meshed to obtain high and low speeds.

The first gear transmission also includes a differential 28, the differential 28 is arranged in the gearbox case 29, and is located at the transmission end of the first gear transmission, and is used to transfer the power after the speed change Transmission to the two half shafts that drive the wheels of the tractor.

The second gear transmission device includes clutch housing assembly I shaft 2 , slip gear 14 and clutch housing assembly II shaft 3 . The shaft 2 of the clutch housing assembly I is connected to the engine through a clutch, and the key on the shaft 2 of the clutch housing assembly I is connected with a power input drive gear 19; the front end of the shaft 3 of the clutch housing assembly II is keyed with an intermediate gear 4 And a duplex gear 5, the intermediate gear 4 meshes with the power input drive gear 19 that is installed on the clutch housing assembly 1 shaft 2. The bull gear of the duplex gear 5 meshes with the pinion of the sliding gear 14 mounted on the front end of the hollow shaft joint 41 .

The rear end of the II shaft 3 of the clutch housing assembly is locked with a round nut 6 and a stop washer, and the sliding gear 14 is installed on the front end of the hollow shaft assembly 41, through the auxiliary transmission shift mechanism 16, the shift fork 17 , locking steel ball 15, etc. to control its sliding position, the rear end of the hollow shaft assembly 41 is connected with the driving bevel gear 36 through a spline and installed in the gearbox case 29, and the driving bevel gear 36 is connected to the transmission case 29. The bevel gears of the first bevel gear shaft 37 of the box are meshed, and the power output by the engine is transmitted to the first bevel gear shaft 37 of the gearbox;

The gearbox is also provided with a rear power output device, which includes a longitudinal transmission shaft 13 vertically arranged in the transmission case 29 and the clutch housing 1, and the front end of the longitudinal transmission shaft 13 passes through The hollow shaft joint 41 is connected with the power input driving gear 19 installed on the I shaft 2 of the clutch housing assembly through an involute spline connection, and the rear end of the longitudinal transmission shaft 13 is connected to the middle through the sliding engagement sleeve 12. The transmission shaft 10 is connected; the intermediate transmission shaft 10, the front end of the intermediate transmission shaft 10 is equipped with an engagement sleeve 12, and is connected to the rear end of the longitudinal transmission shaft 13 through the sliding engagement sleeve 12, and the rear end is equipped with a rear power output driving gear 11; Rear power take-off shaft 8, described rear power take-off shaft 8 is installed on the rear portion of described gearbox casing 29, and one end of described rear power take-off shaft 8 is positioned at described gearbox casing 29 is equipped with rear power take-off slave Driven gear 9, the rear power output driven gear 9 meshes with the rear power output driving gear 11; the rear power output control mechanism 42 is used to control the engagement of the engagement sleeve 12 with the rear end of the longitudinal transmission shaft 13 or separation. By properly changing the number of teeth of the rear power output driving gear 11 and the rear power output driven gear 9 , the rear power output shaft 8 can obtain different rotational speeds.

The left side of the gearbox is also provided with a side power output port, wherein the left end of the first bevel gear shaft 37 of the gearbox extends out of the gearbox case 29, forming the side power output port, which can drive Agricultural implements that need side power output to meet the user's requirements for power side output. When the side power output is not needed, the side power output shaft cover 38 can be installed at the side power output port to ensure safety.

The gearbox is also provided with a bevel gear clearance adjusting device, which is an adjusting gasket 39 arranged at the left side bearing and the gland of the first bevel gear shaft 37 of the gearbox, and is used to adjust the bevel gear clearance. The bevel gear engagement gap between the driving bevel gear 36 and the first bevel gear shaft 37 of the gearbox.

Working transmission route: the shaft 2 of the clutch housing assembly rotates under the drive of the power engine, and drives the shaft 3 of the clutch housing assembly II to rotate through the power input driving gear 19 on it and the intermediate gear 4 meshed with it. Auxiliary transmission control mechanism 16 is used to realize the meshing of the pinion gear of duplex gear 5 on shaft 3 of clutch housing assembly II with the large gear of slip gear 14 installed on the front end of hollow shaft joint 41 to drive hollow shaft joint 41 to rotate . The driving bevel gear 36 installed on the rear end of the hollow shaft joint 41 meshes with the bevel gear of the first bevel gear shaft 37 of the gearbox to drive the first bevel gear shaft 37 of the gearbox to rotate, and through the first bevel gear shaft installed on the gearbox The constant mesh driving gear 40 of 37 meshes with the constant mesh passive gear 33 installed on the gearbox II shaft 20, drives the gearbox II shaft 20 to rotate, and passes through the driving gear 34 of the gearbox II shaft 20 and is installed on the gearbox III The driven gear 32 on the shaft 23 is meshed to drive the gearbox III shaft 23 to rotate, and IV and VI gears 22, II and V gears 21 are also installed on the gearbox III shaft 23, and I, V gears 21 on the gearbox III shaft 23 III gear driving gear 24 meshes with the large gears of I, III, IV, VI gear slip gears 26 installed on the IV shaft 25 of the gearbox, drives the IV shaft 25 of the gearbox to rotate, and passes through the gear on the IV shaft 25 of the gearbox. The reduction gear pinion meshes with the reduction gear 30 installed on the gearbox V shaft 27, drives the gearbox V shaft 27 to rotate, and then meshes with the reduction gear of the differential 28 through the small gear on the gearbox V shaft 27, Drive the differential gear 28 to work, and power is transmitted to the half shaft of the differential gear 28 in the half shaft housing on both sides of the gearbox respectively, and the half shaft is driven to rotate, which can realize the I gear speed change; by analogy, by converting I, The meshing positions of III, IV, and VI gear slip gears 26 and II, V reverse gear slip gears 31 can realize three forward speeds of I, II, and IV; When the bull gear of the duplex gear 5 on the II shaft 3 meshes with the pinion of the slip gear 14 installed on the front end of the hollow shaft joint 41, the slip gear 26 and II, The meshing position of V gear slip gear 31 can realize three forward gear speeds of III, V and VI; The large and small gears mesh with the small and large gears of the slip gear 14 installed on the front end of the hollow shaft joint 41, and the reverse driving gear 35 on the gearbox II shaft 20 and the II, When the V gear slip gear 31 is engaged, two reverse gear speeds can be realized. Another road transmission route is: the power is passed to the vertical transmission shaft 13 through the power input driving gear 19 on the clutch housing assembly 1 shaft 2 and the vertical transmission shaft 13 through the spline connection, so as to realize the vertical transmission shaft 13 and the clutch housing assembly 1 The synchronous rotation of the shaft 2 realizes the engagement of the engagement sleeve 12 with the rear end of the longitudinal transmission shaft 13 by manipulating the rear power output mechanism 42 . Drive the intermediate shaft 10 to rotate, and the rear power output driving gear 11 on the intermediate shaft 10 meshes with the rear power output driven gear 9 installed on the rear power output shaft 8 to drive through the bearing installed on the gearbox housing 29 The rear power take-off shaft 8 on the top rotates to output the power from the rear end of the transmission device. The rear power take-off shaft 8 can be provided with a power take-off shaft cover 7. When the rear power output is not needed, the power take-off shaft cover 7 is installed on the rear On the power take-off shaft 8, to ensure safety.

Claims (5)

1.6+2 gears direct-coupled small four-wheel tractor transmission device, characterized in that it includes: A horizontal gearbox, the horizontal gearbox includes a gearbox case (29) and a first gear transmission device arranged in the gearbox case (29) for driving the half shaft of the tractor to rotate, the first A gear transmission device includes a longitudinal hollow shaft assembly (41) arranged in the gearbox case (29), a bevel gear pair, a plurality of gearbox transverse intermediate shafts and a plurality of pairs of gear pairs; Clutch housing assembly, the clutch housing assembly includes a clutch housing (1) and a second gear arranged longitudinally in the clutch housing (1) for transmitting the power of the engine to the transverse gearbox transmission; The gearbox case (29) is fixedly connected with the clutch housing (1); Rear power take-off device, the said rear power take-off device comprises a longitudinal transmission shaft (13) arranged longitudinally in said gearbox case (29) and clutch housing (1), an intermediate transmission shaft (10), and a rear power take-off Shaft (8), rear power output control mechanism (42). 2. The direct-coupled small four-wheel tractor transmission device with 6+2 gears according to claim 1, characterized in that: the first gear transmission device also includes Differential (28), the differential (28) is arranged in the gearbox case (29), and is located at the transmission end of the first gear transmission, used to transmit the power after speed change to the drive The two half shafts on which the wheels of the tractor turn. 3. The direct-coupled small four-wheel tractor transmission device with 6+2 gears according to claim 2, characterized in that: the second gear transmission device includes Clutch housing assembly I shaft (2), described clutch housing assembly I shaft (2) is connected with engine by clutch, and power input drive gear (19) is installed on the described clutch housing assembly I shaft (2); Sliding gear (14), the sliding gear (14) is installed on the front end of the hollow shaft assembly (41), and is controlled by the sub-speed shifting mechanism (16), the shift fork (17), and the locking steel ball (15) The slip position of the slip gear (14); Clutch housing assembly II shaft (3), the intermediate gear (4) and a double gear (5) are installed on the clutch housing assembly II shaft (3), the intermediate gear (4) is installed on the clutch The power input drive gear (19) on the shell assembly I shaft (2) meshes; the bull gear of the double gear (5) is installed on the front end of the hollow shaft (41) and the slip gear (14) pinion meshes. the 4. The direct-coupled small four-wheel tractor transmission device with 6+2 gears according to claim 3, characterized in that: the rear power output device includes The vertical transmission shaft (13) that is vertically arranged in the gearbox case (29) and the clutch housing (1), the front end of the vertical transmission shaft (13) passes through the hollow shaft joint (41) and is installed on the The power input driving gear (19) on the I shaft (2) of the clutch housing assembly is connected by an involute spline, and the rear end of the longitudinal transmission shaft (13) is connected to the intermediate transmission shaft through a sliding engagement sleeve (12). Shaft (10) connection; The intermediate transmission shaft (10), the front end of the intermediate transmission shaft (10) is equipped with an engagement sleeve (12), which is connected to the rear end of the longitudinal transmission shaft (13) through the sliding engagement sleeve (12), and the rear end is equipped with a rear power Output driving gear (11); Rear power take-off shaft (8), described rear power take-off shaft (8) is installed in the rear portion of described gearbox casing, and described rear power take-off shaft (8) is positioned at the inside of described gearbox casing (29) A rear power output driven gear (9) is installed at one end, and the rear power output driven gear (9) meshes with the rear power output driving gear (11); The rear power output control mechanism (42) is used to control the engagement or separation of the engagement sleeve (12) and the rear end of the longitudinal transmission shaft (13). 5. The direct-coupled small four-wheel tractor transmission device with 6+2 gears according to any one of claims 1, 2, 3 and 4, characterized in that: the left side of the gearbox is provided with As for the side power output port, the left side of the first bevel gear shaft (37) protrudes from the gearbox case (29), forming the side power output port. the

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