CN201162805Y - Novel power split main speed reducer - Google Patents

Abstract

The utility model discloses a novel power shunting main reducer, it includes reduction gear housing assembly (1), set up differential mechanism assembly (16) under reduction gear housing assembly (1), its characteristics are set up driven gear I (13) and driven gear II (15) on differential mechanism assembly (16), set up adjusting ring (14) between driven gear I (13) and driven gear II (15), set up driving gear I (11) and driving gear II (2) on reduction gear housing assembly (1), driven gear I (13) meshes with driving gear I (11), driven gear II (15) meshes with driving gear II (2), set up initiative cylindrical gear (7) on driving gear I (11), set up driven cylindrical gear (4) on driving gear II (2); the bearing capacity of the main reducer can be greatly improved, the ground clearance is greatly improved under the condition of the same torque compared with a single-stage reducer, a wheel-side reducer is omitted compared with a double-stage reduction bridge, the production cost is greatly reduced, and the oil consumption and the noise are reduced.

Description

A new type of power split main reducer

Technical field:

The utility model relates to the technical field of wheeled vehicle drive axles, in particular to a novel power split final reducer for wheeled vehicle drive axles.

Background technique:

With the development of the automobile industry, medium and heavy-duty trucks have entered a high-speed development period, and the demand for corresponding drive axles has also increased. Drive axles with large output torques have become the target of demand, but ordinary single-stage reduction axles are required to meet the needs. The output torque can only increase the diameter of the driven gear, which leads to a large diameter of the driven gear. There is no problem with the use of such an axle road transport vehicle, but it cannot be used as an engineering vehicle due to the small ground clearance. A double-stage reduction axle with a wheel-side reducer is adopted. Although the double-stage reduction axle with a wheel-side reducer increases the ground clearance, it has high cost, low transmission efficiency, high noise, and the wheel is prone to heat and fuel consumption. advanced questions.

In addition, in the usual single-stage reducer and double-stage reducer with wheel-side reduction, when the driving gear meshes with the driven gear, there is an axial force along the axial direction of the differential, and the axial deformation is large under heavy load, which affects the gap between the tooth surfaces. Normal meshing limits the load-carrying capacity of the gears, thereby limiting the transmitted torque; in addition, in order to withstand the axial force of the gears, the differential and the driven gear must be connected with a flange with ribs, in order to arrange the ribs And ensure sufficient support rigidity, resulting in a larger distance between the two bearings of the differential, which is not conducive to the improvement of the overall rigidity.

Invention content:

The purpose of this utility model is to overcome the deficiencies of the above-mentioned prior art, and provide a compact structure, high load-carrying capacity of the main reducer with a power split structure, mainly to solve the existing single-stage reducer with small ground clearance, two-stage The reducer needs to increase the wheel reducer, high production cost, high fuel consumption and noise, and low carrying capacity.

In order to achieve the above purpose, the utility model is achieved in the following way: a new power split main reducer, which includes a reducer housing assembly 1, a reducer housing cover 5 is arranged on the reducer housing assembly 1, and a The housing assembly 1 is provided with a differential gear assembly 16, and its special feature is that a driven gear I 13 and a driven gear II 15 are arranged on the differential gear assembly 16, and the two driven gears are independent gears. On the contrary, other parameters are the same, the driven gear can move axially along the axis of the differential to ensure that the axial force is constant and the power distribution is even. An adjustment ring 14 is set between the driven gear I 13 and the driven gear II 15. Drive gear I 11 and drive gear II 2 are set on the reducer housing assembly 1, driven gear I 13 is meshed with drive gear I 11, driven gear II 15 is meshed with drive gear II 2, and drive gear I 11 and drive gear II are meshed. Drive gear I bearing seat assembly 10 and driving gear II bearing seat assembly 3 are set respectively on gear II 2, drive gear rear bearing 12 is respectively set at the rear end of drive gear I 11 and drive gear II 2, drive gear I 11 The driving cylindrical gear 7 is set on the gear shaft of the inner and outer bearing front portion of the driving gear II 2, and the driven cylindrical gear 4 is established on the gear shaft of the inner and outer bearing front portion of the driving gear II 2, and the driving cylindrical gear 7 and the driven cylindrical gear 4 are meshed. The top of driving gear II 2 is provided with driving gear II locking nut 6, and the top of driving gear I 11 is connected with input flange 9 through ball bearing 8.

A new power split main reducer of the present utility model, the number of teeth of the driving gear I 11 and the driving gear II 2 is equal, the number of teeth of the driven gear I 13 and the driven gear II 15 is equal, the driving cylindrical gear 7 and the driven cylindrical gear 4 transmission ratio 1:1.

The utility model relates to a novel power split main reducer, wherein the cylindrical gear is a helical gear.

A kind of novel power split main reducer of the present utility model, its described driving gear II bearing seat assembly 3 and driving gear I bearing seat assembly 10 positions are respectively provided with adjusting gaskets.

A new type of power split main reducer of the utility model, the differential gear assembly 16 includes a differential housing, a cross shaft is arranged on the differential housing, and planetary gears and planetary gears are arranged on the cross shaft. The gear meshes with the side shaft gear; the differential case is a split structure at the cross shaft.

A new type of power split main reducer of the utility model is two sets of parallel driving gears, wherein two driving gears with the same number of teeth mesh with two driven gears with the same number of teeth respectively, and there are respectively on the two driving gear shafts Two cylindrical gears are meshed, and the two cylindrical gears have equal teeth and are used as power splitting gears. After the power is input to one driving gear, the same power is distributed to the other driving gear through the spur gear, and then the two driving gears distribute the same power to the driven gear meshed with it, and the power is output together through the driven gear.

Compared with the prior art, a new power split main reducer of the present utility model has the following positive effects: 1. Since the driven gear is installed backwards, the axial forces received by it cancel each other out, avoiding the passive gear in the existing main reducer. Unbalanced axial force, so as to avoid the meshing problem caused by deformation under heavy load; 2. Two sets of driving and driven gears work at the same time, which greatly improves the output torque and meets the requirements of large output torque; 3. The shafts on both sides of the driven gear The axial force is offset, and there is no need to arrange flanges and ribs to carry the axial force, which shortens the distance between the differential bearings, improves the support rigidity, makes the structure more compact, and improves the overall bearing capacity; 4. It is suitable for driving The main reducer with power split structure of the bridge can increase the output torque several times in a limited space, so as to ensure the replacement of the wheel-side reducer bridge under the premise of sufficient ground clearance, reduce costs and reduce fuel consumption.

Description of drawings:

Fig. 1 is a structural representation of the utility model.

Detailed ways:

In order to better understand and implement, a new type of power split final reducer of the present utility model will be described in detail with reference to specific embodiments given below with reference to the accompanying drawings.

Embodiment 1, see Fig. 1, process and manufacture the main reducer housing assembly 1, the reducer housing assembly 1 has a reducer housing cover 5, install the differential gear assembly 16 on the main reducer housing assembly In Cheng 1, the differential assembly 16 includes a differential case, on which there is a cross shaft, on which planetary gears are installed, the planetary gears mesh with the side shaft gears, and the differential case is on The cross shaft is a split structure, and the driven gear I 13 and the driven gear II 15 are slidably fitted on the differential case through internal splines. The gears transmit power to the differential case through splines. The two driven gears are independent gears, which are unaffected and easy to assemble and adjust. Except for the opposite direction of rotation, other parameters are the same. The driven gears can be rotated along the axis of the differential. To move to ensure that the axial force is constant, so that the power distribution is even, install the adjustment ring 14 between the driven gear I 13 and the driven gear II 15, and install the driving gear I 11 and the driving gear II on the reducer housing assembly 1 2. The number of teeth of the driving gear I 11 and the driving gear II 2 are equal, and the two driving gears are supported by horseback riding. The gear support rigidity is large, which improves the bearing capacity of the gears. The driving gear I 11 meshes with the driven gear I 13, and the driving gear II 2 and the passive gear Gear II 15 meshes, respectively install driving gear I bearing seat assembly 10 and driving gear II bearing seat assembly 3 on driving gear I 11 and driving gear II 2, and drive gear II bearing seat assembly 3 and driving gear I bearing The 10 parts of the seat assembly are respectively installed with adjusting shims, the rear bearings 12 of the driving gear are respectively installed at the rear ends of the driving gear I 11 and the driving gear II 2, and the gear shafts at the front of the inner and outer bearings of the driving gear I 11 are installed through splines The driving cylindrical gear 7, the driven cylindrical gear 4 is installed on the gear shaft in front of the inner and outer bearings of the driving gear II 2 through a spline, the driving cylindrical gear 7 and the driven cylindrical gear 4 are meshed, and the transmission ratio of the two is 1:1 , the cylindrical gear is a helical gear, except that the direction of rotation is opposite, other parameters are the same, install the locking nut 6 of the driving gear II on the top of the driving gear II 2, and connect the top of the driving gear I 11 to the input flange 9 through the ball bearing 8 .

A new type of power shunt main reducer described in the utility model, when working, the power is input by the driving gear I, and is shunted to the driven cylindrical gear through the driving cylindrical gear with a transmission ratio of 1:1, so that the power passes through the driving gear I and the passive gear. The gear I and the driving gear II mesh with the driven gear II and converge on the differential case. Due to the sliding fit in the axial direction, the axial positions of the driven gear I and the driven gear II are automatically determined when they mesh with the two driving gears at the same time. Yes, the distribution of the two sets of transmission loads can be adjusted through a small amount of axial movement of the axis of the differential assembly to make the two sets of transmission loads equal, so that the axial forces of the driven gear I and the driven gear II are equal to achieve balance, thereby The two sets of transmission loads are evenly distributed. In order to ensure that the gears of the two sets of transmission branch chains can be meshed correctly, the driving gear I can be adjusted by adding an adjusting gasket to the bearing seat assembly of the driving gear II and the bearing seat assembly of the driving gear I. and the axial position of the driving gear II, and adjust the axial position of the driven gear I and the driven gear II by adding an adjustment ring between the driven gear I and the driven gear II to ensure the correct meshing of the two sets of transmission branch chains, and finally by the differential housing The planetary gears meshed with the cross shaft will output the power.

Claims (6)

1. A new type of power split main reducer, which includes a reducer housing assembly (1), a reducer housing cover (5) is provided on the reducer housing assembly (1), and a reducer housing assembly ( 1) There is a differential gear assembly (16), which is characterized in that a driven gear I (13) and a driven gear II (15) are arranged on the differential gear assembly (16), and a driven gear I (13) and a driven gear II (15) are arranged on the differential gear assembly (16). Adjustment ring (14) is set between gear II (15), driving gear I (11) and driving gear II (2) are set on reducer housing assembly (1), driven gear I (13) and driving gear I (11) are meshed, the driven gear II (15) is meshed with the driving gear II (2), and the driving gear I (11) and the driving gear II (2) are respectively provided with the driving gear I bearing seat assembly (10) and Drive gear II bearing seat assembly (3), respectively set drive gear rear bearing (12) at the rear end of drive gear I (11) and drive gear II (2), and set drive gear rear bearing (12) at the front of the inner and outer bearings of drive gear I (11) Drive cylindrical gear (7) is established on the gear shaft of driving gear II (2), and driven cylindrical gear (4) is established on the gear shaft of the inner and outer bearing front portion of driving gear II (2), driving cylindrical gear (7) and driven cylindrical gear (4) ) are engaged with each other, and the driving gear II lock nut (6) is arranged on the top of the driving gear II (2), and the top of the driving gear I (11) is connected with the input flange (9) through a ball bearing (8). 2. A new type of power split main reducer according to claim 1, characterized in that the number of teeth of the driving gear I (11) and the driving gear II (2) are equal, and the number of teeth of the driven gear I (13) and the driven gear II (15) number of teeth is equal, driving cylindrical gear (7) and driven cylindrical gear (4) transmission ratio 1: 1. 3. A new power split final reducer according to claim 1 or 2, characterized in that the cylindrical gear is a helical gear. 4. A new power split main reducer according to claim 1, characterized in that the drive gear II bearing seat assembly (3) and the driving gear I bearing seat assembly (10) are respectively provided with adjustment pads piece. 5. A new type of power split final reducer according to claim 1, characterized in that the differential assembly (16) includes a differential case, and a cross shaft is arranged on the differential case, A planetary gear is arranged on the cross shaft, and the planetary gear meshes with the side shaft gear. 6. A new type of power split final reducer according to claim 5, characterized in that the differential case is a split structure at the cross shaft.

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