New energy mining dump truck gearbox
By using four parallel motor inputs and a mirror-symmetrical helical gear design, combined with a two-speed transmission component, the power transmission problem of mining dump trucks under extreme working conditions is solved, achieving high torque load and power continuity, and improving transmission reliability and safety.
Patent Information
- Application Number
- CN202520600214.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing civilian electric vehicle gearboxes are insufficient to meet the power transmission requirements of mining dump trucks under complex working conditions such as extreme heavy loads, frequent starts and stops, and long slopes. They suffer from problems such as large axial forces on transmission bearings, high gear stress, rapid wear, and poor power continuity, which affect transmission reliability and safety.
A new energy mining dump truck gearbox was designed, which adopts four motors in parallel input, with front and rear helical gears set in a mirror symmetrical configuration. The power is combined through constant mesh shafts to reduce axial load, and two rear intermediate shafts are used for split transmission to reduce gear stress. A two-speed transmission component is equipped to ensure power continuity and avoid power interruption.
It increases torque density, reduces wear on shaft support bearings, improves transmission reliability and shift smoothness, and ensures the continuous operation safety and security of mining cars under extreme working conditions.
Smart Images
Figure CN223725309U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a new energy mining dump truck gearbox belongs to new energy mining dump truck technical field. BACKGROUND
[0002] The dump truck refers to the vehicle that unloads goods by hydraulic or mechanical lifting, also named as the tipper, the dump truck's carriage can automatically dump a certain angle, the mining dump truck as the core equipment of mine transportation, due to the high carbon emission, energy consumption efficiency, operation and maintenance cost of traditional diesel power system, in recent years, the pure electric mining dump truck has become the important transport tool of mine with the advantages of low operation cost, low maintenance cost, high work efficiency, zero emission, and the gearbox as the important part of electric drive system can play the role of " speed reduction and torque increase" in the process of mine car climbing, and enhance the mine car climbing ability, and in the process of mine car heavy downhill, the driver can adjust the transmission ratio and energy recovery efficiency of gearbox through gear shifting, but the extreme heavy load, frequent start and stop, long slope brake and other complex working conditions of mining dump truck put forward strict requirements to the power transmission system, and the existing civil electric vehicle gearbox technology cannot meet the demand, and the following defects exist:
[0003] 1. Single motor drive cannot meet the heavy load under the demand of large torque power output, and the power confluence structure of multiple motor drive is complex, the transmission shaft bears larger axial force and the gear bears larger stress when bearing large torsion, causing the accelerated wear of the shaft system support bearing and gear on the transmission shaft, short service life, higher failure rate and influence transmission reliability.
[0004] 2. The gear shifting impact is large when the mine car lifts and unloads, there is power interruption risk, the power continuity is poor, and the safety of continuous operation under extreme conditions cannot be guaranteed. INVENTION CONTENTS
[0005] The new energy mining dump truck gearbox provided by the utility model improves the torque density, meets the large torque bearing demand of mining dump truck, the helical teeth of the front helical gear and the rear helical gear are mirror-symmetrically arranged, the axial bearing of the common meshing shaft is reduced, the stress of the shaft system support bearing on the common meshing shaft is reduced, the wear of the shaft system support bearing is reduced, the transmission reliability is improved, the failure rate is reduced, the connectivity of power during gear shifting is guaranteed, the power interruption risk during the lifting and unloading of mine car is avoided, the power impact caused by the synchronous gear shifting of two gearbox assemblies is reduced, the gear shifting flexibility is improved, and the safety of continuous operation under extreme conditions is improved.
[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:
[0007] The new energy mine dump truck gearbox comprises four motors, an input mechanism, a variable speed mechanism and an output shaft meshed with the variable speed mechanism, characterized in that the input mechanism comprises front input assemblies connected with two motors respectively, rear input assemblies connected with the other two motors respectively and a constant meshing shaft connected with the input end of the variable speed mechanism, the rotating directions of the front input assemblies and the rear input assemblies are opposite, coaxial front bevel gears meshed with the front input assemblies and coaxial rear bevel gears meshed with the rear input assemblies are fixed on the constant meshing shaft, and the bevel gears of the front bevel gears and the rear bevel gears are mirror-symmetrically arranged to combine the powers of the front input assemblies and the rear input assemblies on the constant meshing shaft.
[0008] Preferably, the front input assemblies comprise motor one, motor two, a front input shaft one connected with motor one, a front input shaft two connected with motor two and parallel to the front input shaft one, front input gears are fixed on the front input shaft one and the front input shaft two respectively, and the front input gears are meshed with the front bevel gears; the rear input assemblies comprise motor three, motor four, a rear input shaft one connected with motor three, a rear input shaft two connected with motor four and parallel to the rear input shaft one, rear input gears are fixed on the rear input shaft one and the rear input shaft two respectively, and the rear input gears are meshed with the rear bevel gears.
[0009] Preferably, the front input shaft one is coaxially aligned with the rear input shaft one, the front input shaft two is coaxially aligned with the rear input shaft two, the constant meshing shaft is parallelly arranged between the front input shaft one and the front input shaft two, and the front input gears and the rear input gears are bevel gears and the bevel gears are mirror-symmetrically arranged.
[0010] Preferably, the variable speed mechanism comprises an intermediate shaft coaxially connected with the constant meshing shaft, rear intermediate shafts meshed with the intermediate shaft and two-gear variable speed assemblies mounted on the rear intermediate shafts and meshed with the output shaft, and the output shaft is coaxially arranged on the rear side of the intermediate shaft.
[0011] Preferably, the number of the rear intermediate shafts is two and the rear intermediate shafts are symmetrically arranged on the two sides of the intermediate shaft, and the rear intermediate shafts are coaxially fixed with the constant meshing gears meshed with the intermediate shaft.
[0012] Preferably, the two-gear variable speed assemblies comprise a shift gear coaxially fixed on the rear intermediate shaft, a shift gear sleeve slidably assembled on the shift gear, a one-gear driving gear and a two-gear driving gear rotatably mounted on the rear intermediate shaft through a loose shaft, the one-gear driving gear and the two-gear driving gear are respectively meshed with the output shaft and arranged on the left and right sides of the shift gear, the shift gear sleeve moves to the left to combine with the one-gear driving gear and moves to the right to combine with the two-gear driving gear.
[0013] Preferably, the output shaft is fixed with a one-gear driven gear meshed with the one-gear driving gear and a two-gear driven gear meshed with the two-gear driving gear.
[0014] The utility model discloses the beneficial effect is:
[0015] The new energy mine dump truck gearbox of the utility model, the front input assembly is connected with two motors respectively, the rear input assembly is connected with another two motors respectively, the front helical gear on the common meshing shaft is engaged with the front input assembly, the rear helical gear is engaged with the rear input assembly, the power of the front input shaft and the rear input assembly is converged to the common meshing shaft by the front helical gear and the rear helical gear, forms four motor power convergence and parallel input, improves the torque bearing capacity of the common meshing shaft, improves the torque density, satisfies the large torque bearing demand of mine dump truck, realizes the power continuous input when single motor fault, guarantees the continuous operation ability under extreme working condition, the helical tooth of the front helical gear and the rear helical gear is mirror image symmetry arrangement, makes the meshing force of the front helical gear acting on the common meshing shaft and the meshing force of the rear helical gear acting on the common meshing shaft reverse arrangement and mutual offset, the axial thrust of the common meshing shaft because of the rotation of the front helical gear and the axial thrust because of the rotation of the rear helical gear are offset reversely, thereby reducing the axial bearing of the common meshing shaft, reducing the stress of the shafting support bearing on the common meshing shaft, reducing the wear of the shafting support bearing, improving the transmission reliability, reducing the failure rate.
[0016] Two rear intermediate shafts are used for shunt transmission, which effectively reduces the gear contact stress of the common meshing gear on the rear intermediate shaft, avoids the gear from being accelerated wear or deformed due to excessive stress when transmitting large torque, improves the torque bearing capacity, and improves the transmission reliability. Two rear intermediate shafts are respectively equipped with two gear shifting assemblies, one group performs gear shifting while the other group protects the current gear position unchanged, ensures the connectivity of power during gear shifting, avoids the risk of power interruption during the lifting and unloading of the mine car, reduces the power impact caused by the synchronous gear shifting of the two gear shifting assemblies, improves the gear shifting flexibility, and improves the safety of continuous operation under extreme conditions. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the transmission structure schematic view of new energy mine dump truck gearbox.
[0018] Figure 2 It is the transmission structure schematic view of new energy mine dump truck gearbox when low-speed gear power is output.
[0019] Figure 3 It is the transmission structure schematic view of new energy mine dump truck gearbox when high-speed gear power is output.
[0020] Figure 4 It is the combination schematic view of input mechanism, common meshing shaft, front helical gear and rear helical gear. DETAILED DESCRIPTION
[0021] The embodiments of the utility model are described in detail below. Figures 1-4 The embodiments of the utility model are described in detail below.
[0022] The utility model provides a new energy mine dump truck gearbox, including four motors, input mechanism, speed changing mechanism 1 and with the meshing connection of speed changing mechanism 1 output shaft 2, its characterized in that: input mechanism includes with two motors respectively connected front input assembly 3, with another two motors respectively connected rear input assembly 4 and always meshing axle 5, always meshing axle 5 is connected with the input end of speed changing mechanism 1, and the rotating direction of front input assembly 3 is opposite to rear input assembly 4, and always meshing axle 5 is coaxially fixed with the front bevel gear 6 of meshing with front input assembly 3 and the rear bevel gear 7 of meshing with rear input assembly 4, and the bevel of front bevel gear 6 and rear bevel gear 7 is mirror image symmetry and is set, and the power of front input assembly 3 and rear input assembly 4 is converged to always meshing axle 5.
[0023] The new energy mine dump truck gearbox described above, front input assembly 3 is connected with two motors respectively, rear input assembly 4 is connected with another two motors respectively, front bevel gear 6 on always meshing axle 5 is meshed with front input assembly 3, rear bevel gear 7 is meshed with rear input assembly 4, and the power of front input assembly 3 and rear input assembly 4 is converged to always meshing axle 5 by front and rear bevel gears, forms four motor power convergence and parallel input, improves the torque carrying capacity of always meshing axle 5, improves torque density, meets the large torque carrying demand of mine dump truck, realizes the power continuous input when single motor fault, and guarantees the continuous operation ability under extreme working condition. Figure 4 It can be seen from the above that the bevel of front bevel gear 6 and rear bevel gear 7 is symmetrically arranged in the form of eight characters, so that the meshing force of front bevel gear acting on always meshing axle and the meshing force of rear bevel gear acting on always meshing axle are reversely arranged and offset each other, that is, the axial thrust generated on always meshing axle due to the rotation of front bevel gear 6 and the axial thrust generated due to the rotation of rear bevel gear 7 are reversely offset, thereby reducing the axial bearing of always meshing axle 5, reducing the stress of shafting support bearing on always meshing axle 5, reducing the wear of shafting support bearing, improving the transmission reliability, and reducing the failure rate.
[0024] The front input assembly 3 comprises motor 1 8, motor 2 9, front input shaft 1 10 connected with motor 1 8, front input shaft 2 1 1 connected with motor 2 9 and parallel with front input shaft 1 10, front input gear 12 fixed on front input shaft 1 10 and front input shaft 2 1 1 respectively, front input gear 12 engaged with front helical gear 6; the rear input assembly comprises motor 3 1 3, motor 4 1 4, rear input shaft 1 1 5 connected with motor 3 1 3, rear input shaft 2 1 6 connected with motor 4 1 4 and parallel with rear input shaft 1 1 5, rear input gear 1 7 fixed on rear input shaft 1 1 5 and rear input shaft 2 1 6 respectively, rear input gear 1 7 engaged with rear helical gear 7. Front input shaft 1 10 is connected with motor 1 8, front input shaft 2 1 1 is connected with motor 2 9, front input gear 12 on front input shaft 1 10 and front input shaft 2 1 1 is engaged with front helical gear 6 respectively, power of motor 1 and motor 2 is transmitted to constant engagement shaft 5, rear input gear 1 7 on rear input shaft 1 1 5 and rear input shaft 2 1 6 is engaged with rear helical gear 7 respectively, power of motor 3 and motor 4 is transmitted to constant engagement shaft 5, four motors power is combined and flows in parallel.
[0025] The front input shaft 1 10 is coaxially aligned with the rear input shaft 1 1 5, the front input shaft 2 1 1 is coaxially aligned with the rear input shaft 2 1 6, the constant engagement shaft 5 is arranged in parallel between the front input shaft 1 10 and the front input shaft 2 1 1, the front input gear 12 and the rear input gear 1 7 are both helical gears and the helical teeth are arranged in mirror image symmetry. The power output directions of motor 1 8 and motor 3 1 3 are opposite, the front input shaft 1 10 and the front input gear 12 thereon and the rear input shaft 1 1 5 and the rear input gear 1 7 thereon form a pair of input gear sets with opposite rotation directions, the power input directions of motor 2 9 and motor 4 1 4 are opposite, the front input shaft 2 1 1 and the front input gear 12 thereon and the rear input shaft 2 1 6 and the rear input gear 1 7 thereon form another pair of input gear sets with opposite rotation directions, since the helical teeth of the front helical gear 6 and the rear helical gear 7 are arranged in mirror image symmetry, the front input gear 12 engaged with the front helical gear 6 and the rear input gear 1 7 engaged with the rear helical gear 7 are also arranged in mirror image symmetry to adapt to the tooth direction of the front helical gear 6 and the rear helical gear 7, thereby forming two pairs of input gear sets with opposite rotation directions to combine power on the constant engagement shaft.
[0026] The transmission mechanism 1 comprises intermediate gear shaft 1 8 coaxially connected with the constant engagement shaft 5, rear intermediate shaft 1 9 engaged with the intermediate gear shaft 1 8 and two-gear transmission assembly 20 arranged on the rear intermediate shaft 1 9 and engaged with the output shaft 2, the output shaft 2 is coaxially arranged on the rear side of the intermediate gear shaft 1 8. The power of the four motors is combined and flows to the constant engagement shaft 5 through the front input assembly 3 and the rear input assembly 4, the constant engagement shaft 5 drives the intermediate gear shaft 1 8 to rotate synchronously, the intermediate gear shaft 1 8 transmits power to the two-gear transmission assembly 20, the two-gear transmission assembly 20 transmits power to the output shaft 2, forming the output of the power.
[0027] Wherein, the number of the rear intermediate shaft 19 is two and symmetrically arranged on both sides of the intermediate gear shaft 18, and the constant meshing gear 21 engaged with the intermediate gear shaft 18 is coaxially fixed on the rear intermediate shaft 19. The constant meshing shaft 5 and the intermediate gear shaft 18 transmit the power of four motors converging in parallel, and the power is branched by the two rear intermediate shafts 19, effectively reducing the gear contact stress of the constant meshing gear 21 on the rear intermediate shaft 19, avoiding the gear from being worn out or deformed due to excessive stress when transmitting large torque, improving the torque carrying capacity, and improving the transmission reliability.
[0028] Wherein, the two-gear transmission assembly 20 includes a shift gear 22 fixed coaxially on the rear intermediate shaft 19, a shift gear sleeve 23 slidably assembled on the shift gear 22, a one-gear driving gear 24 and a two-gear driving gear 25 rotatably mounted on the rear intermediate shaft 19 through a loose sleeve shaft, and the one-gear driving gear 24 and the two-gear driving gear 25 are engaged with the output shaft 2 and arranged on the left and right sides of the shift gear 22. The shift gear sleeve 23 moves to the left to combine with the one-gear driving gear 24, and moves to the right to combine with the two-gear driving gear 25. Two rear intermediate shafts 19 are respectively equipped with two-gear transmission assemblies 20, so there are two sets of two-gear transmission assemblies 20. When one set is shifting, the other set is protecting the current gear position, ensuring the connectivity of power during shifting, avoiding the risk of power interruption when the mine car is lifting and unloading, reducing the power impact caused by synchronous shifting of the two transmission assemblies, improving the shifting flexibility, and improving the safety of continuous operation in extreme conditions. When the shift gear sleeves 23 in the two sets of two-gear transmission assemblies 20 are combined with the one-gear driving gears 24 respectively, low-speed gear power output is formed, at this time the output torque is maximum, which is suitable for mine car full load climbing, heavy load starting and other high load scenes; when the shift gear sleeves 23 in the two sets of two-gear transmission assemblies 20 are combined with the two-gear driving gears 25 respectively, high-speed gear power output is formed, at this time the transmission is running in the high efficiency interval, which is suitable for mine car empty return or flat road high-speed running and other low load scenes.
[0029] Wherein, the output shaft 2 is fixed with a one-gear driven gear 26 engaged with the one-gear driving gear 24 and a two-gear driven gear 27 engaged with the two-gear driving gear 25. When the shift gear sleeve 23 is combined with the one-gear driving gear 24, the power of the intermediate gear shaft 18 is transmitted to the output shaft 2 through the constant meshing gear 21, the shift gear 22, the shift gear sleeve 23, the one-gear driving gear 24 and the one-gear driven gear 26, forming low-speed gear power output. When the shift gear sleeve 23 is combined with the two-gear driving gear 25, the power of the intermediate gear shaft 18 is transmitted to the output shaft 2 through the constant meshing gear 21, the shift gear 22, the shift gear sleeve 23, the two-gear driving gear 25 and the two-gear driven gear 24, forming high-speed gear power output.
[0030] The technical scheme of the embodiments of the utility model is completely described above in combination with the drawings, and it needs to be indicated that the described embodiments are only a part of the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor all belong to the protection range of the utility model.
Claims
1. A new energy mine dump truck gearbox, comprising four motors, an input mechanism, a transmission mechanism and an output shaft meshed and connected with the transmission mechanism, characterized in that: The input mechanism comprises a front input assembly connected with two motors respectively, a rear input assembly connected with other two motors respectively and a constant meshing shaft connected with the input end of the transmission mechanism, the rotating directions of the front input assembly and the rear input assembly are opposite, the front bevel gear meshing with the front input assembly and the rear bevel gear meshing with the rear input assembly are coaxially fixed on the constant meshing shaft, the bevel gears of the front bevel gear and the rear bevel gear are mirror-symmetrically arranged, and the power of the front input assembly and the rear input assembly is combined to the constant meshing shaft.
2. The new energy mine dump truck gearbox according to claim 1, characterized in that: The front input assembly comprises motor one, motor two, a front input shaft one connected with the motor one, a front input shaft two connected with the motor two and parallel with the front input shaft one, front input gears are fixed on the front input shaft one and the front input shaft two respectively, and the front input gears mesh with the front bevel gear; the rear input assembly comprises motor three, motor four, a rear input shaft one connected with the motor three, a rear input shaft two connected with the motor four and parallel with the rear input shaft one, rear input gears are fixed on the rear input shaft one and the rear input shaft two respectively, and the rear input gears mesh with the rear bevel gear.
3. The new energy mine dump truck gearbox according to claim 2, characterized in that: The front input shaft one is coaxially aligned with the rear input shaft one, the front input shaft two is coaxially aligned with the rear input shaft two, and the constant meshing shaft is parallel arranged between the front input shaft one and the front input shaft two, the front input gears and the rear input gears are bevel gears and the bevel gears are mirror-symmetrically arranged.
4. The new energy mine dump truck gearbox according to claim 1, characterized in that: The transmission mechanism comprises an intermediate shaft coaxially connected with the constant meshing shaft, rear intermediate shafts meshing with the intermediate shaft and two-gear transmission assemblies mounted on the rear intermediate shafts and meshing with the output shaft, and the output shaft is coaxially arranged on the rear side of the intermediate shaft.
5. The new energy mine dump truck gearbox according to claim 1, characterized in that: The number of the rear intermediate shafts is two and the rear intermediate shafts are symmetrically arranged on the two sides of the intermediate shaft, and the constant meshing gears meshing with the intermediate shaft are coaxially fixed on the rear intermediate shafts.
6. The new energy mine dump truck gearbox according to claim 5, characterized in that: The two-gear transmission assembly comprises a shift gear coaxially fixed on the rear intermediate shaft, a shift gear sleeve slidably assembled on the shift gear, a one-gear driving gear and a two-gear driving gear rotatably mounted on the rear intermediate shaft through a loose shaft, the one-gear driving gear and the two-gear driving gear mesh with the output shaft and are arranged on the left and right sides of the shift gear, the shift gear sleeve moves to the left to combine with the one-gear driving gear and moves to the right to combine with the two-gear driving gear.
7. The new energy mine dump truck gearbox according to claim 6, characterized in that: The one-gear driven gear meshing with the one-gear driving gear and the two-gear driven gear meshing with the two-gear driving gear are fixed on the output shaft.