Speed reducer device of underground mine car

Abstract

An underground mine car speed reducer device comprises a speed reducer box body, an input shaft assembly and an output shaft assembly, the input shaft assembly comprises an input shaft, a first-stage driving gear and a pump connecting gear, the first-stage driving gear and the pump connecting gear are arranged up and down and arranged on the input shaft in a sleeving mode, and the upper end of the input shaft directly receives power of a driving source through a spline; the output shaft assembly comprises an output shaft and a secondary driven gear arranged on the output shaft in a sleeving mode, the output shaft is perpendicular to the input shaft, the front end of the output shaft extends out of the speed reducer box body and is connected with the first output flange, and the rear end of the output shaft extends out of the speed reducer box body and is connected with the second output flange. Complex multi-gear speed changing and gear shifting mechanisms are abandoned, on the premise that all underground working conditions are met, efficient, continuous and smooth power transmission is achieved, the transmission efficiency and reliability are improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of speed reducers, in particular to a speed reducer device for an underground mining vehicle. Background Art

[0002] The reducer of an underground mining vehicle is a core device for power transmission, requiring continuous power delivery in narrow tunnels and under heavy-load climbing conditions. The current mainstream solution uses a multi-speed transmission structure, which introduces complex transmission chains and the risk of power interruption.

[0003] The gearbox assembly for an electric loader disclosed in Chinese patent CN220850594U is directly connected to the input end cover (3) of the input shaft (4) through a spline, and integrates a reverse clutch (11), a first gear clutch (12), a second gear clutch (13) and a speed change valve to form a three-speed speed regulation structure, effectively optimizing the volume and manufacturing cost of the traditional gearbox. However, this multi-speed transmission architecture still has insurmountable inherent defects: 1) Complex structure: The planetary gear set (sun gear 10, planet carrier 122 / 112) and three clutch sets are nested, resulting in a total of over 30 parts and multiple failure points; 2) Efficiency loss: Clutch shifting causes friction loss, limiting transmission efficiency; 3) Power interruption: There is a power interruption during gear shifting. When the underground mining truck is heavily loaded and climbing a slope, this interruption period is very likely to cause a vehicle slipping accident, which cannot meet the core requirements of continuous transmission and operational safety. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a reducer device for an underground mining vehicle, which abandons the complex multi-speed transmission and shifting mechanism, and realizes efficient, continuous and smooth power transmission while ensuring that all working conditions underground are met, thereby improving transmission efficiency and reliability and reducing maintenance costs.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a reducer device for an underground mining vehicle, comprising a reducer housing, an input shaft assembly and an output shaft assembly, the input shaft assembly comprising an input shaft, a first-stage driving gear and a continuous pump gear, the first-stage driving gear and the continuous pump gear are arranged up and down and sleeved on the input shaft, the upper end of the input shaft directly receives the driving source power through a spline; the output shaft assembly comprises an output shaft and a second-stage driven gear sleeved on the output shaft, the output shaft is perpendicular to the input shaft, the front end of the output shaft extends out of the reducer housing and is connected to the first output flange, the rear end of the output shaft extends out of the reducer housing and is connected to the second output flange, and the output flange transmits power to the vehicle through the transmission shaft A drive axle of a vehicle; a two-shaft assembly is provided in the reducer housing, and the two-shaft assembly includes a bevel gear shaft and a primary driven gear sleeved on the bevel gear shaft, the primary driving gear is meshed with the primary driven gear, and the bevel gear on the bevel gear shaft is meshed with the secondary driven gear; power is transmitted from the driving source to the input shaft through the spline, driving the primary driving gear to rotate, the primary driving gear is meshed with the primary driven gear fixed on the bevel gear shaft, completing the first deceleration and torque increase, and transmitting the power to the bevel gear shaft; the bevel gear shaft is meshed with the secondary driven gear fixed on the output shaft, completing the second deceleration and torque increase, and changing the rotation direction by 90 degrees, and the power is finally output through the first output flange and the second output flange at the end of the output shaft.

[0006] As an improvement, it also includes a cooling component, which includes a condenser, an oil pump, a connecting pump shaft and an oil pump gear arranged outside the reducer housing. The oil pump gear is engaged with the connecting pump gear, and the oil pump gear is connected to the oil pump through the connecting pump shaft; the lubricating oil in the reducer housing is sent to the condenser through the oil pump to cool it down.

[0007] As an improvement, a cooling water channel connected to the vehicle cooling system is provided inside the condenser.

[0008] As an improvement, the cooling assembly further includes a filter, and the lubricating oil enters the oil pump through the filter.

[0009] As an improvement, the reducer housing includes an upper housing and a lower housing, the upper housing is provided with a first bearing that covers the upper end of the input shaft, and the lower housing is provided with a second bearing that covers the lower end of the input shaft; the upper housing is provided with a third bearing that covers the upper end of the bevel gear shaft, and the lower housing is provided with a fourth bearing that covers the lower end of the bevel gear shaft.

[0010] As an improvement, an oil storage chamber is provided at the bottom of the reducer housing.

[0011] The beneficial effects brought about by the present invention compared with the prior art are: 1. Extremely simplified transmission system, significantly improving efficiency and reliability: The system completely eliminates multi-speed transmission mechanisms and shift actuators in favor of a single-speed, fixed-ratio, two-stage reduction design. This significantly reduces structural complexity, component count, system weight, and volume. It eliminates power interruptions during shifting, achieving 100% continuous power transmission, significantly improving transmission efficiency and ride smoothness, and greatly reducing component wear caused by shift shock. This significantly enhances overall system reliability and durability, reducing maintenance costs throughout the entire lifecycle. 2. Continuous and stable power output is the fundamental guarantee for operational safety: Uninterrupted and continuous power output completely eliminates the risk of instantaneous stall and slippage caused by power interruption in critical and dangerous scenarios such as heavy-load climbing and complex road conditions, providing unprecedented high safety and operational reliability for underground operations. 3. Efficient and reliable lubrication and cooling, significantly extending service life: The self-driven integrated pressure lubrication system ensures reliable and sufficient lubrication of key friction pairs under various operating conditions, effectively reducing wear. The water-cooling heat dissipation system efficiently and stably removes heat generated by the transmission system, accurately controlling the lubricating oil temperature within the optimal operating range. The synergistic effect of the two maximizes transmission efficiency and significantly extends the service life and maintenance-free period of the reducer and the entire electric drive unit. 4. High integration, improved manufacturing and maintenance convenience: The vertical integrated structure reduces the number of parts and interfaces; the spline direct connection simplifies assembly; the high integration of the lubrication and cooling system helps reduce manufacturing complexity and may simplify on-site installation and maintenance processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the reducer's internal structure.

[0013] Figure 2 Schematic diagram of the oil pump assembly.

[0014] Figure 3 This is the transmission principle diagram of the reducer.

[0015] Figure 4 This is the lubricating oil cooling pipeline diagram. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] A reducer device for an underground mining vehicle includes a reducer housing, an input shaft assembly, an output shaft assembly, a second shaft assembly, and a cooling assembly. The reducer can be vertically mounted to a traction motor serving as a driving power source.

[0018] like Figure 1 、 3As shown, the input shaft assembly includes an input shaft 3, a primary driving gear 4, and a pump gear 5. The primary driving gear 4 is a small gear. The primary driving gear and pump gear 5 are arranged vertically and sleeved on the input shaft 3. The upper end of the input shaft 3 directly receives the driving source power via a spline. The output shaft assembly includes an output shaft 10 and a secondary driven gear 9 sleeved on the output shaft 10. The secondary driven gear 9 is a large bevel gear. The output shaft 10 is perpendicular to the input shaft 3. The front end of the output shaft 10 extends outside the reducer housing and is connected to a first output flange 12. The rear end of the output shaft 10 extends outside the reducer housing and is connected to a second output flange 11. The output flange transmits power to the vehicle drive axle via a transmission shaft. The two-shaft assembly is located within the reducer housing and includes a bevel gear shaft 6 and a primary driven gear 7 sleeved on the bevel gear shaft 6. The primary driven gear 7 is a large gear. The primary driving gear 4 meshes with the primary driven gear 7, and the small bevel gear 8 on the bevel gear shaft 6 meshes with the secondary driven gear 9. Power is transmitted from the driving source to the input shaft via the spline, driving the primary driving gear 4 to rotate. The primary driving gear 4 meshes with the primary driven gear 7 fixed on the bevel gear shaft 6, completing the first deceleration and torque increase, and transmitting the power to the bevel gear shaft 6; the bevel gear shaft 6 meshes with the secondary driven gear 9 fixed on the output shaft, completing the second deceleration and torque increase, and changing the rotation direction by 90 degrees. The power is finally output through the first output flange and the second output flange at the end of the output shaft. The transmission system of the present invention is extremely simplified, with a leap in efficiency and reliability: it completely abandons the multi-speed transmission mechanism and shift actuator, and adopts a single-speed fixed large transmission ratio two-stage deceleration design, which brings about a significant reduction in structural complexity, number of parts, system weight and volume; eliminates power interruption during the gear shift process, achieves 100% continuity of power transmission, significantly improves transmission efficiency and driving smoothness, and greatly reduces component wear caused by gear shift shock, thereby greatly improving the overall reliability and durability of the system and reducing maintenance costs throughout the life cycle. Continuous and stable power output is the fundamental guarantee for operational safety: Uninterrupted and continuous power output completely eliminates the risk of instantaneous stall and slippage caused by power interruption in critical and dangerous scenarios such as heavy-load climbing and complex road conditions, providing unprecedented high safety and operational reliability for underground operations.

[0019] like Figure 1 As shown, the reducer housing includes an upper housing 1 and a lower housing 2. The upper housing 1 is provided with a first bearing that covers the upper end of the input shaft 3, and the lower housing 2 is provided with a second bearing that covers the lower end of the input shaft 3; the upper housing 1 is provided with a third bearing that covers the upper end of the bevel gear shaft 6, and the lower housing 2 is provided with a fourth bearing that covers the lower end of the bevel gear shaft 6; the upper housing 1 is connected to the traction motor through a flange; the bottom of the lower housing 2 is provided with an oil storage chamber 16, and the lubricating oil flows back to the oil storage chamber 16 after heat exchange with the internal transmission components of the reducer.

[0020] like Figures 1 to 4 As shown, the cooling assembly includes a condenser 15, a filter 14, an oil pump 13, a continuous pump shaft 18, and an oil pump gear 17, which are arranged outside the reducer housing. The oil pump gear 17 is meshed with the continuous pump gear 5, and the oil pump gear 17 is connected to the oil pump 13 via the continuous pump shaft 18. As long as the driving source power is input, the input shaft 3 rotates, which will synchronously drive the continuous pump gear 5, and then drive the oil pump gear 17 and the oil pump 13 to work. No additional motor or power source is required. The oil pump 13 builds up a certain pressure of lubricating oil. After being cooled by the condenser 15, it is forcibly transported to the key parts that need lubrication through the preset oil channel, including all gear meshing pairs and support bearings. The condenser 15 is provided with a cooling water channel connected to the vehicle cooling system. The high-temperature lubricating oil heated by the gears and bearings flows back to the oil storage chamber 16 of the oil pan and is sent to the condenser 15 through the oil pump 13. Cooling water flows inside the condenser 15. In the condenser 15, the high-temperature lubricating oil and the cooling water exchange heat through the heat exchange wall. The heat of the lubricating oil is taken away by the cooling water, thereby reducing the oil temperature. The cooled lubricating oil is then sent to the lubrication point by the oil pump. The lubrication and cooling of the present invention are efficient and reliable, and the service life is significantly extended: the self-driven integrated pressure lubrication system ensures reliable and sufficient lubrication of key friction pairs under various working conditions, effectively reducing wear; the water-cooled heat dissipation system efficiently and stably takes away the heat generated by the transmission system, and accurately controls the lubricating oil temperature within the optimal working range; the two work together to maintain the transmission efficiency to the greatest extent, and significantly extend the service life and maintenance-free period of the reducer and the entire electric drive device.

Claims

1. A reducer device for an underground mining vehicle, comprising a reducer housing, an input shaft assembly, and an output shaft assembly, characterized in that: The input shaft assembly includes an input shaft, a primary driving gear and a continuous pump gear, the primary driving gear and the continuous pump gear are arranged up and down and sleeved on the input shaft, and the upper end of the input shaft directly receives the driving source power through a spline; the output shaft assembly includes an output shaft and a secondary driven gear sleeved on the output shaft, the output shaft is perpendicular to the input shaft, the front end of the output shaft extends out of the reducer housing and is connected to the first output flange, the rear end of the output shaft extends out of the reducer housing and is connected to the second output flange, and the output flange transmits power to the vehicle drive axle through the transmission shaft; a two-shaft assembly is provided in the reducer housing, the two-shaft assembly includes a bevel gear shaft and a primary driven gear sleeved on the bevel gear shaft, the primary driving gear is meshed with the primary driven gear, and the bevel gear on the bevel gear shaft is meshed with the secondary driven gear; The power is transmitted from the driving source to the input shaft through the spline, driving the first-stage driving gear to rotate. The first-stage driving gear meshes with the first-stage driven gear fixed on the bevel gear shaft, completing the first deceleration and torque increase, and transmitting the power to the bevel gear shaft; the bevel gear shaft meshes with the second-stage driven gear fixed on the output shaft, completing the second deceleration and torque increase, and changing the rotation direction by 90 degrees. The power is finally output through the first output flange and the second output flange at the end of the output shaft.

2. The reducer device for an underground mining vehicle according to claim 1, characterized in that: It also includes a cooling component, which includes a condenser, an oil pump, a connecting pump shaft and an oil pump gear arranged outside the reducer housing. The oil pump gear is engaged with the connecting pump gear, and the oil pump gear is connected to the oil pump through the connecting pump shaft; the lubricating oil in the reducer housing is sent to the condenser through the oil pump to cool it down.

3. The reducer device for an underground mining vehicle according to claim 2, characterized in that: A cooling water channel connected to the vehicle cooling system is provided inside the condenser.

4. The reducer device for an underground mining vehicle according to claim 2, characterized in that: The cooling assembly further includes a filter, through which the lubricating oil enters the oil pump.

5. The reducer device for an underground mining vehicle according to claim 1, characterized in that: The reducer housing includes an upper housing and a lower housing. The upper housing is provided with a first bearing that covers the upper end of the input shaft, and the lower housing is provided with a second bearing that covers the lower end of the input shaft; the upper housing is provided with a third bearing that covers the upper end of the bevel gear shaft, and the lower housing is provided with a fourth bearing that covers the lower end of the bevel gear shaft.

6. The reducer device for an underground mining vehicle according to claim 1, characterized in that: An oil storage cavity is provided at the bottom of the reducer housing.

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