A dual-power flow motor drive axle for a dual-track engineering vehicle

Abstract

A dual-power flow motor drive axle for a double-track engineering vehicle, comprising a drive motor, a steering motor, a coupling, a first differential planetary group, a second differential planetary group, a third differential planetary group, a bevel gear pair and a crank locking mechanism, etc.; the left end of the drive motor is connected to an external wheel-side reducer through a coupling, and the right end is connected to the sun gear of the first differential planetary group; the output end of the steering motor is connected to the planetary carrier of the second planetary group; the first differential planetary group and the second differential planetary group are arranged side by side, the planetary carriers of the first and third differential planetary groups are connected through shafts, the sun gear of the third differential planetary group is connected to the external wheel-side reducer through a coupling, and the crank locking mechanism is arranged on the third differential planetary group through a bevel gear pair; the present invention is a novel dual-power flow motor drive axle for a double-track engineering vehicle, which has a simple and compact structure, a novel design and a reasonable layout.

Description

Technical Field

[0001] The invention belongs to the technical field of motor drive axles, and in particular relates to a dual-power flow motor drive axle for a double-track engineering vehicle. Background Art

[0002] Double-tracked engineering vehicles are an important part of the equipment industry and are widely used in various projects such as highway and railway construction, urban and industrial construction, open-pit mining, bridge and culvert tunnels, water conservancy and hydropower construction, and national defense construction. The working environment of double-tracked engineering vehicles is generally poor, and the load changes are nonlinear and drastic, which also leads to low fuel efficiency of engineering vehicles and aggravates environmental pollution.

[0003] The steering mechanism is one of the important assemblies of tracked vehicles. The quality of its performance directly affects the steering maneuverability and production efficiency of the vehicle. Therefore, the research on the drive axle mechanism with excellent performance has always been an important topic in the field of vehicle engineering. At present, the mechanical dual-power flow steering mechanism used in the drive system of dual-track engineering vehicles cannot achieve stepless steering, and its adaptability and maneuverability to load are very poor; although the hydraulic mechanical dual-power flow steering mechanism used can achieve stepless steering, its stepless speed range in the high efficiency zone is small and the cost is high. Electric transmission technology can achieve stepless speed change from the lowest speed to the highest operating speed, with high efficiency, eliminating the transmission shaft and transmission, compact and flexible layout, without the vibration and impact of mechanical transmission shifting, the vehicle runs relatively smoothly, and reduces pollution emissions. At present, the research on motor drive axle technology is still not mature enough in overall performance technology, the operation is not stable enough, and the efficiency needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide a novel dual-power flow motor drive axle mechanism for dual-track engineering vehicles. The traction motor and the steering motor are coaxially arranged with a compact structure, aiming to solve the problem that the traditional transmission mechanism cannot achieve stepless speed steering or the high-efficiency area of ​​traction operation is small during operation.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A dual-power flow motor drive axle for a dual-track engineering vehicle, comprising a drive motor, a steering motor, a first coupling, a first differential planetary group, a second differential planetary group, a third differential planetary group, a bevel gear pair and a crank locking mechanism; the left end of the drive motor is connected to a first external wheel side reducer through a first coupling, and the right end is connected to a sun gear of the first differential planetary group; the output end of the steering motor is connected to a planet carrier of the second planetary group; the first differential planetary group and the second differential planetary group are arranged side by side, and the first planetary group and the second planetary group are connected to the same gear ring; the planet carriers of the first differential planetary group and the third differential planetary group are connected through a shaft, the sun gear of the third differential planetary group is connected to the second external wheel side reducer through a second coupling, and the crank locking mechanism is arranged on the third differential planetary group through a bevel gear pair;

[0007] The driving motor is arranged in the left housing, and the first coupling is connected to the first external wheel reducer through the first shaft;

[0008] The bevel gear pair includes a small bevel gear and a large bevel gear. The output shaft of the crank locking mechanism is connected to the small bevel gear of the bevel gear pair. The large bevel gear and the ring gear of the third differential planetary group are an integrated structure and are connected to the planetary gear set of the third differential planetary group through the ring gear of the third differential planetary group.

[0009] Furthermore, the first differential planetary set, the second differential planetary set and the third differential planetary set have the same structure, and all include a sun gear, a planetary gear set, a planet carrier and a ring gear; a planetary gear set is meshed between the sun gear and the ring gear, and the planet carrier is connected to the planetary gear set.

[0010] Furthermore, the sun gear of the second differential planetary set is fixed by a second sun gear shaft.

[0011] Furthermore, the first differential planetary group, the second differential planetary group and the steering motor are all arranged in the intermediate housing, the sun gear of the second differential planetary group is provided with a second sun gear shaft, the second sun gear shaft is fixed to the intermediate housing through a spline groove connection, and the sun gear of the second differential planetary group is fixed.

[0012] Furthermore, the planet carrier of the first differential planetary group is connected to the planet carrier of the third differential planetary group via a spline shaft, and the second sun gear shaft and the steering motor output shaft are both hollow shafts.

[0013] Furthermore, the sun gear of the third differential planetary set is connected to the second coupling via the third sun gear shaft, and the second coupling is connected to the second external wheel reducer via the second shaft.

[0014] Furthermore, a first coupling housing and a second coupling housing are respectively disposed on the outer sides of the first coupling and the second coupling.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] The invention is a novel dual-power flow motor drive axle for dual-track engineering vehicles, which has a simple and compact structure, high space utilization, novel design and reasonable layout.

[0017] The present invention overcomes the disadvantages of mechanical dual power flow steering mechanism, such as low efficiency, high strength, and inability to achieve stepless speed steering; it also overcomes the disadvantages of hydraulic mechanical steering mechanism, such as high cost, low efficiency, complex structure, and environmental pollution caused by hydraulic oil leakage.

[0018] The present invention adopts motor transmission, has constant output power, good speed regulation performance, and fast dynamic response; it improves operating efficiency, reduces pollution emissions, and is more energy-saving and environmentally friendly; when driving straight, it controls the steering motor to brake, reduces the slippage of the crawler relative to the ground, and reduces crawler wear; it can adapt to external loads in complex working conditions, and the power can be fully utilized.

[0019] The steering structure of the present invention can realize stepless steering at any radius, is maneuverable and smooth, and has good steering performance; it is safe and reliable in operation, and the transmission parts are less subject to vibration and impact than mechanical steering mechanisms, and it is easy and labor-saving to operate, thereby reducing the labor intensity of the driver; it has low working noise, low failure rate, and is easy to maintain and overhaul.

[0020] The present invention innovatively installs a crank locking mechanism in structure, which can realize manual steering when the vehicle breaks down and is towed, thereby optimizing the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 It is a schematic diagram of the system structure of the present invention;

[0022] Attached Figure 2 This is a three-dimensional half-section structure diagram of the present invention

[0023] Attached Figure 3 It is a three-dimensional structural view of the present invention.

[0024] Attached Figure 4 It is a three-dimensional structural view of the present invention.

[0025] Attached Figure 5 It is a three-dimensional half-section structure diagram of the present invention.

[0026] Description of reference numerals:

[0027] 1—coupling housing; 2—coupling; 3—left end shaft of driving motor; 4—left housing; 5—driving motor; 6—right end shaft of driving motor; 7—intermediate housing; 8—sun gear; 9—planetary gear set; 10—ring gear; 11—planet carrier; 15—end cover; 16—steering motor; 17—sun gear shaft; 18—steering motor output shaft; 19—spline shaft; 20—keyway; 27—shaft; 28—large bevel gear; 29—small bevel gear; 30—crank locking mechanism. DETAILED DESCRIPTION

[0028] As shown in the figure, a dual-power flow motor drive axle for a double-track engineering vehicle includes a drive motor 5, a steering motor 16, a differential planetary set, a bevel gear pair, an intermediate housing 7, a wheel reducer, a crank locking mechanism 30, etc. The drive motor 5 is arranged in the left housing 4 of the structure, the left end is connected to the wheel reducer through a coupling 2, and the right end is connected to the sun gear 8 of the first differential planetary set; the steering motor 16 is arranged in the intermediate housing 7, and the steering motor output shaft 18 is connected to the planetary carrier of the second planetary set; the first and second differential planetary sets are connected to the same gear ring 10, and the sun gear of the second planetary set is fixed by a spline shaft 17; the planetary carriers of the first and third differential planetary sets are connected by a spline shaft 19, the sun gear of the third differential planetary set is connected to the wheel reducer through a coupling 2, and the crank locking mechanism 30 is connected to the planetary gear of the third differential planetary set through a bevel gear pair and a gear ring.

[0029] The first differential planetary set includes a sun gear 8, a planetary gear set 9, a planet carrier 11 and a ring gear 10. The planetary gear set 9 is meshed between the sun gear 8 and the ring gear 10, and the planet carrier 11 is connected to the planetary gear set 9. The second and third differential planetary sets are arranged in the same manner as the first differential planetary set, and the first and second planetary sets are connected to the same ring gear 10.

[0030] The left end shaft 3 of the driving motor 5 is connected to the coupling 2 , the coupling 2 is connected to the wheel-side reducer through the shaft 27 , and the right end shaft 6 of the driving motor is connected to the sun gear 8 .

[0031] The output shaft 18 of the steering motor 16 is connected to the planet carrier 14 of the second differential planetary set. The sun gear shaft 17 of the second differential planetary set is connected and fixed to the intermediate housing 7 through a spline groove 20. The sun gear 12 is fixed.

[0032] The planet carrier 11 of the first differential planetary set is connected to the planet carrier of the third differential planetary set via a spline shaft 19, and the sun gear shaft 17 and the steering motor output shaft 18 are both hollow shafts.

[0033] The output shaft of the crank locking mechanism 30 is connected to the small bevel gear 29 of the bevel gear pair, and the large bevel gear 28 and the ring gear of the third differential planetary set are an integrated structure, and are connected to the planetary gear set of the third differential planetary set through the ring gear of the third differential planetary set.

[0034] The sun gear of the third differential planetary set is connected to the coupling 26 via the shaft 27 , and the coupling 26 is connected to the wheel-side reducer via the shaft 27 .

[0035] A coupling housing 1 is arranged outside the coupling 2 .

[0036] During the straight driving process, the steering motor 16 is controlled to be in a braking state, and the drive motor 5 performs traction operations. The left end shaft 3 of the drive motor 5 transmits power to the left wheel-side reducer through the coupling 2, and the right end shaft 6 of the drive motor first transmits power to the sun gear 8 of the first differential planetary group. The sun gear 8 and the planetary gear set 9 are meshed, and the planetary gear set 9 drives the planetary carrier 11 to rotate, and transmits power to the planetary carrier of the third differential planetary group through the shaft 19, and then the planetary gear and the sun gear of the third differential planetary group are meshed. The shaft 27 connected to the sun gear of the third differential planetary group transmits power to the right wheel-side reducer through the coupling 2. In this process, the torque and speed of the wheel-side reducers on the left and right sides are equal, and the rotation direction is the same, and the tracked vehicle maintains a straight driving state.

[0037] During the steering process, the steering motor 16 starts to work, and the steering power first drives the planetary gear set to rotate through the second differential planetary set planetary carrier through the output shaft 18, and then drives the ring gear 10. The rotation of the ring gear 10 also drives the planetary gear set 9 of the first differential planetary set to rotate; next, the steering power is transmitted to the shaft 6 connected to the sun gear 8 through the cooperation of the planetary gear set 9 and the sun gear 8; the other steering power is transmitted to the planetary gear set of the third differential planetary set through the planetary carrier 11, the shaft 19 and the planetary carrier of the third differential planetary set, and then the planetary gear set is meshed with the sun gear, and the shaft 27 connected to the sun gear of the third differential planetary set transmits the steering power to the right wheel side reducer through the coupling 2; the drive motor 5 outputs power, and the power generated by the drive motor 5 and the left-way steering power will be power coupled and transmitted to the left wheel side reducer through the coupling 2 together, and the power of the drive motor 5 and the left-way steering power realize power convergence, so that the reducers at both ends have speed and torque differences, thereby realizing continuous steering of any radius.

Claims

1. A dual-track engineering vehicle dual-power flow motor drive axle, characterized in that: It includes a driving motor, a steering motor, a first coupling, a first differential planetary group, a second differential planetary group, a third differential planetary group, a bevel gear pair and a crank locking mechanism; the left end of the driving motor is connected to the first external wheel side reducer through the first coupling, and the right end is connected to the sun gear of the first differential planetary group; the output end of the steering motor is connected to the planet carrier of the second planetary group; the first differential planetary group and the second differential planetary group are arranged side by side, and the first planetary group and the second planetary group are connected to the same gear ring; the planet carriers of the first differential planetary group and the third differential planetary group are connected through shafts, the sun gear of the third differential planetary group is connected to the second external wheel side reducer through the second coupling, and the crank locking mechanism is arranged on the third differential planetary group through the bevel gear pair; The driving motor is arranged in the left housing, and the first coupling is connected to the first external wheel reducer through the first shaft; The bevel gear pair includes a small bevel gear and a large bevel gear. The output shaft of the crank locking mechanism is connected to the small bevel gear of the bevel gear pair. The large bevel gear and the ring gear of the third differential planetary group are an integrated structure and are connected to the planetary gear set of the third differential planetary group through the ring gear of the third differential planetary group.

2. The dual-track engineering vehicle dual-power flow motor drive axle according to claim 1, characterized in that: The first differential planetary set, the second differential planetary set and the third differential planetary set have the same structure, and all include a sun gear, a planetary gear set, a planet carrier and a ring gear; a planetary gear set is meshed between the sun gear and the ring gear, and the planet carrier is connected to the planetary gear set.

3. A dual-track engineering vehicle dual-power flow motor drive axle according to claim 2, characterized in that: The sun gear of the second differential planetary set is fixed via the second sun gear shaft.

4. The dual-track engineering vehicle dual-power flow motor drive axle according to claim 1, characterized in that: The first differential planetary set, the second differential planetary set and the steering motor are all arranged in the intermediate housing. The sun gear of the second differential planetary set is provided with a second sun gear shaft, which is fixed to the intermediate housing through a spline groove. The sun gear of the second differential planetary set is fixed.

5. A dual-track engineering vehicle dual-power flow motor drive axle according to claim 4, characterized in that: The planet carrier of the first differential planetary group is connected to the planet carrier of the third differential planetary group through a spline shaft, and the second sun gear shaft and the steering motor output shaft are both hollow shafts.

6. The dual-track engineering vehicle dual-power flow motor drive axle according to claim 1, characterized in that: The sun gear of the third differential planetary set is connected to the second coupling via the third sun gear shaft, and the second coupling is connected to the second external wheel reducer via the second shaft.

7. The dual-track engineering vehicle dual-power flow motor drive axle according to claim 1, characterized in that: A first coupling housing and a second coupling housing are respectively disposed on the outer sides of the first coupling and the second coupling.

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