Lubricating system of mine truck gearbox

Abstract

The utility model discloses a lubricating system of a mine truck gearbox. The lubricating system is comprehensive in lubricating coverage range, simple in oil way design and convenient to maintain in the later period, the use risk is reduced, the lubricating efficiency is improved, the cost is reduced, and the reliability of the system is improved. The gearbox shell assembly comprises a main shell, an upper cover, a rear shell, a supporting plate and an end cover, and the main shell, the upper cover and the rear shell are spliced to form a gearbox cavity; the input shaft and the output shaft are coaxially arranged; the upper middle shaft and the power take-off shaft are coaxially arranged; the lower intermediate shaft and the oil pump power take-off shaft are coaxially arranged; and an oil pump; the input shaft and the output shaft are coaxially arranged in the middle of the gearbox cavity in the height direction, the upper intermediate shaft is located on the upper portion of the gearbox cavity in the height direction, and the lower intermediate shaft is located on the lower portion of the gearbox cavity in the height direction. The oil pump gear is connected with an inner rotor of the oil pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gearbox lubrication, in particular to a lubricating system of mine truck gearbox. BACKGROUND

[0002] The lubricating oil in the gearbox has the functions of reducing the friction of the parts in the gearbox, reducing wear, heat dissipation, cleaning, preventing corrosion and the like, and has an important influence on the service performance and service life of the gearbox. If the lubricating system of the gearbox does not comprehensively cover the parts, especially the parts that are not originally soaked in the lubricating oil, or the lubricating oil circulation is unreasonable, it will seriously affect the heat dissipation of the gearbox, and even cause the parts to be ablated in a short time. At the same time, if the rotating parts in the gearbox are not lubricated enough, the friction will increase, which will seriously affect the transmission efficiency of the gearbox.

[0003] With the continuous improvement of the speed and torque of the gearbox, the requirements for the lubricating system are also getting higher and higher. However, the existing lubricating system has the problems of incomplete lubrication coverage, inconvenient maintenance, and no consideration of lubrication under different working conditions such as uphill and downhill, which can easily cause oil pipe blockage or oil leakage due to high oil pressure. In addition, the conventional lubricating system generally needs an oil pipe, which not only needs to be fixed in the gearbox, but also occupies a large space, which can affect the arrangement of other parts. Especially for the existing mine truck gearbox, the lubricating system occupies a large space, which leads to a large volume of the entire gearbox, and some parts are not lubricated enough, which causes wear. Therefore, it is urgent to develop a reliable mine truck gearbox lubricating system. SUMMARY

[0004] In view of the above problems, the utility model provides a lubricating system of mine truck gearbox, which has comprehensive lubrication coverage, simple oil circuit design, convenient maintenance, reduces the use risk, improves the lubrication efficiency, reduces the cost, and improves the reliability of the system.

[0005] A lubricating system of mine truck gearbox, characterized in that it comprises:

[0006] A gearbox housing assembly comprising a main housing, an upper cover, a rear housing, a support plate, and an end cover, wherein the main housing, the upper cover, and the rear housing are combined to form a gearbox cavity, the support plate is used to set corresponding bearing positioning holes to reliably position the shafts, and the end cover is installed at the corresponding output position of the output shaft;

[0007] Coaxially arranged input shaft and output shaft;

[0008] Coaxially arranged upper intermediate shaft and power take-off shaft;

[0009] Coaxially arranged lower intermediate shaft and oil pump power take-off shaft;

[0010] and an oil pump;

[0011] The input shaft and the output shaft are coaxially arranged at the middle position in the height direction of the gearbox cavity, the upper intermediate shaft is arranged at the upper position in the height direction of the gearbox cavity, the lower intermediate shaft is arranged at the lower position in the height direction of the gearbox cavity, the oil pump driving shaft is connected with the oil pump gear through the oil pump driving gear, and the oil pump gear is connected with the inner rotor of the oil pump through a transmission shaft.

[0012] The support plate is provided with a first guiding oil path from bottom to top, the rear shell is provided with a second guiding oil path from top to bottom and connected with the corresponding oil collecting ring of the output shaft, the upper cover is provided with a first oil injection oil path and a third guiding oil path in the axial direction, the starting end of the first oil injection oil path is connected with the first guiding oil path, the starting end of the third guiding oil path is connected with the first guiding oil path, the front end plate of the main shell is provided with a fourth guiding oil path from top to bottom, the fourth guiding oil path is connected with the positions of the bearings on the front end plate respectively and above the lubricating oil level, the starting end of the fourth guiding oil path is connected with the third guiding oil path, the first oil injection oil path is provided with a plurality of spray holes, the central diffusion oil path is formed between the input shaft and the output shaft, the central diffusion oil path includes a central shaft oil path and a radial distribution oil path, the central diffusion oil path is connected with the gears, the spacers and the bearings on the input shaft and the output shaft, the oil collecting ring guides the lubricating oil from the second guiding oil path into the central shaft oil path, and the lower intermediate shaft and the oil pump driving shaft are immersed below the lubricating oil level.

[0013] An oil filter is arranged at the central position of the bottom of the gearbox shell assembly, the oil filter is connected with the oil inlet of the oil pump through a pipeline, and the oil outlets of all the oil pumps are connected with the inlet of the first guiding oil path through a pipeline.

[0014] It is further characterized in that:

[0015] The oil filter is provided with an overflow valve, so as to prevent the oil pipe from being blocked or the oil from leaking due to the excessively high oil pressure during the uphill and downhill processes of the vehicle;

[0016] The main shell is provided with an oil filter maintenance window below the oil filter, the oil filter maintenance window is a sealed cover plate structure, when the oil filter needs to be maintained, the sealed cover plate structure is opened, and then the oil filter or the lubricating oil can be replaced;

[0017] The bottom of the main shell is further provided with an external cooling device below the oil pump, the oil pumped out by the oil pump is connected with the lubricating oil input port of the external cooling device through a pipeline, the lubricating oil output port of the external cooling device is connected with the inlet of the first guiding oil path through a pipeline, and the lubricating oil can be reliably and quickly cooled according to the oil temperature, so that the lubricating oil can be lubricated and cooled at a reasonable temperature.

[0018] The utility model discloses a rotating oil stirring and oil pump active pumping mode is used to lubricate the whole gearbox, and the oil pump gear connects the inner rotor of oil pump through the transmission shaft, so that the gearbox works, and the oil pump also works simultaneously, the lubricating oil at the bottom of the gearbox cavity is absorbed into the oil pump after filtering, and the oil pump pumps the lubricating oil into the upper cover and rear shell of the gearbox, the first oil injection oil way of the upper cover sprays oil to the gear and bearing on the upper intermediate shaft which are high and cannot be stirred, on the other hand, the third guide oil way in the upper cover leads the oil to the fourth guide oil way of the front end plate to lubricate the corresponding bearing and the bearing which cannot be sprayed, the second guide oil way in the rear shell connects the oil collecting ring on the output shaft, and the lubricating oil enters the central shaft oil way through the oil collecting ring, and then reaches the gear, spacer and bearing through the radial distribution oil way on the input shaft and output shaft, the lower parts in the gearbox are soaked in the lubricating oil, and active lubrication is not needed, the lubricating system covers all the parts needing lubrication, and the bearing in the deep position of the input shaft and output shaft is covered, the oil filter is in the middle position at the bottom of the gearbox, and no matter the vehicle is uphill or downhill, the oil pump can absorb the oil through the oil filter, the lubrication coverage is comprehensive, the oil way design is simple, the post-maintenance is convenient, the use risk is reduced, the lubrication efficiency is improved, the cost is reduced, and the reliability of the system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is oil way arrangement schematic diagram of the utility model;

[0020] Fig. 2 It is transmission connection schematic diagram of the utility model;

[0021] The name corresponding to the serial number in the drawing is as follows:

[0022] First guide oil way 1, second guide oil way 2, first oil injection oil way 3, third guide oil way 4, fourth guide oil way 5, central shaft oil way 6, radial distribution oil way 7;

[0023] Gearbox shell assembly 10, main shell 11, upper cover 12, rear shell 13, support plate 14, end cover 15, input shaft 20, output shaft 30, oil collecting ring 31, upper intermediate shaft 40, power take-off shaft 50, lower intermediate shaft 60, oil pump power take-off shaft 70, oil pump power take-off gear 71, oil pump 80, oil pump gear 81, gearbox cavity 90, oil filter 100, oil filter maintenance window 110, external cooling device 120. DETAILED DESCRIPTION

[0024] A kind of lubricating system of mine truck gearbox, see Figs. 1-2It comprises a gearbox housing assembly 10; coaxially arranged input shaft 20, output shaft 30; coaxially arranged upper intermediate shaft 40, power take-off shaft 50; coaxially arranged lower intermediate shaft 60, oil pump power take-off shaft 70; and oil pump 80;

[0025] The gearbox housing assembly 10 comprises a main housing 11, an upper cover 12, a rear housing 13, a support plate 14, and an end cover 15. The main housing 11, the upper cover 12, and the rear housing 13 are combined to form a gearbox cavity 90. The support plate 14 is used to set corresponding bearing positioning holes, so that each shaft can be reliably positioned. The end cover 15 is capped at the corresponding output position of the output shaft 30.

[0026] The input shaft 20 and the output shaft 30 are located at the middle position in the height direction of the gearbox cavity 90. The upper intermediate shaft 40 and the power take-off shaft 50 are located at the upper position in the height direction of the gearbox cavity 90. The lower intermediate shaft 60 and the oil pump power take-off shaft 70 are located at the lower position in the height direction of the gearbox cavity 90. The oil pump power take-off shaft 70 is connected to the oil pump gear 81 through the oil pump power take-off gear 71. The oil pump gear 81 is connected to the inner rotor of the oil pump 80 through a transmission shaft.

[0027] The support plate 14 is provided with a first guide oil way 1 from bottom to top. The rear housing 13 is provided with a second guide oil way 2 from top to bottom, which is connected to the corresponding oil collecting ring 31 of the output shaft 30. The upper cover 12 is provided with a first oil injection oil way 3 and a third guide oil way 4 along the axial direction. The starting end of the first oil injection oil way 3 is connected to the first guide oil way 1. The starting end of the third guide oil way 4 is connected to the first guide oil way 1. The front end plate of the main housing 11 is provided with a fourth guide oil way 5 from top to bottom. The fourth guide oil way 5 is connected to each bearing position above the lubricating oil level on the front end plate, respectively. The starting end of the fourth guide oil way 5 is connected to the third guide oil way 4. The first oil injection oil way 3 is provided with a plurality of spray holes. A central diffusion oil way is formed between the input shaft 20 and the output shaft 30. The central diffusion oil way comprises a central shaft oil way 6 and a radial distribution oil way 7. The central diffusion oil way 7 is connected to the gears, spacers, and bearings on the input shaft 20 and the output shaft 30. The oil collecting ring 31 guides the lubricating oil from the second guide oil way 2 to the inlet of the central shaft oil way 6. The lower intermediate shaft 60 and the oil pump power take-off shaft 70 are immersed below the lubricating oil level.

[0028] The bottom center position of the gearbox housing assembly 10 is provided with an oil filter 100. The oil filter 100 is connected to the oil inlet of the oil pump 80 through a pipeline. The oil outlets of all oil pumps 80 are connected to the inlet of the first guide oil way 1 through a pipeline.

[0029] In specific embodiments, the oil filter 100 is equipped with an overflow valve, thereby preventing oil leakage caused by oil pipe blockage or excessive oil pressure during uphill and downhill driving of the vehicle.

[0030] The main shell 11 is provided with an oil filter maintenance window 110 corresponding to the position directly below the oil filter 100, and the oil filter maintenance window 110 is a sealed cover plate structure, when the oil filter maintenance is needed, the sealed cover plate structure is opened, and then the oil filter 100 or the lubricating oil can be replaced;

[0031] The bottom of the main shell 11 is further provided with an external cooling device 120 corresponding to the position directly below the oil pump 80, the oil pumped by the oil pump 80 is connected to the lubricating oil input port of the external cooling device 120 through a pipeline, and the lubricating oil output port of the external cooling device 120 is connected to the inlet of the first guide oil way 1 through a pipeline, so that reliable and rapid cooling can be realized according to the lubricating oil temperature, and the lubricating oil can be cooled and lubricated at a reasonable temperature.

[0032] The utility model discloses a lubricating system of gearbox, which adopts the mode of rotary oil stirring and oil pump active pumping to lubricate the whole gearbox. The oil pump gear is connected to the inner rotor of the oil pump through a transmission shaft, so that the oil pump is also working when the gearbox is working. The lubricating oil at the bottom of the gearbox cavity is sucked into the oil pump after being filtered by the oil filter, and then the oil pump pumps the lubricating oil into the upper cover and the rear shell of the gearbox. The first oil injection oil way of the upper cover sprays oil to the gears and bearings on the upper intermediate shaft which are high in position and cannot be stirred. On the other hand, the third guide oil way in the upper cover leads the oil to the fourth guide oil way of the front end plate to lubricate the corresponding bearings and the bearings which cannot be sprayed with oil. The second guide oil way in the rear shell is connected to the oil collecting ring on the output shaft. The lubricating oil enters the central shaft oil way through the oil collecting ring, and then reaches the gear, spacer and bearing and other parts through the radial distribution oil way on the input shaft and output shaft. The lower parts in the gearbox are immersed in the lubricating oil and do not need to be actively lubricated. The lubricating system covers all parts that need to be lubricated, and covers the bearings which are deep in position on the input shaft and output shaft. The oil filter is located at the bottom of the gearbox. No matter whether the vehicle is uphill or downhill, the oil pump can suck oil through the oil filter. In addition, the oil filter maintenance window is arranged on the bottom cover plate near the oil filter, which facilitates the replacement and maintenance of the oil filter. The utility model simplifies the oil way structure, cancels the oil pipe and integrates the design. The lubricating oil directly reaches the parts through the internal oil way of the shell, which saves the cost and space. The lubricating system has an interface for external cooling equipment. If the heat dissipation efficiency needs to be improved in the future, a separate cooling equipment can be directly connected.

[0033] The beneficial effects are as follows:

[0034] 1. The lubricating system covers all friction parts such as bearings, gears and spacers.

[0035] 2. The oil filter is arranged in the middle and equipped with an overflow valve to facilitate oil suction when the vehicle is uphill or downhill, and prevent oil leakage caused by high oil pressure due to oil pipe blockage or high speed.

[0036] 3. With sealed cover plate structure, to facilitate replacement of oil filter and after-sales maintenance;

[0037] 4. The upper cover integrates oil circuit, cancels oil pipe, reduces cost while increases reliability;

[0038] 5. The lubricating oil reaches the shaft through the oil collecting ring on the output shaft, lubricating all the gaskets, gears and bearings;

[0039] 6. The external cooling interface is reserved, facilitating the cooling needs in the later stage and adding a heat exchanger.

[0040] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A lubrication system for a mining truck transmission, characterized in that It comprises: A gearbox housing assembly, which comprises a main housing, an upper cover, a rear housing, a support plate, an end cover, the main housing, the upper cover and the rear housing are combined to form a gearbox cavity, the support plate is used to set corresponding bearing positioning holes, so that each shaft can be reliably positioned, and the end cover is covered on the corresponding output position of an output shaft; Coaxially arranged input shaft and output shaft; Coaxially arranged upper intermediate shaft and power take-off shaft; Coaxially arranged lower intermediate shaft and oil pump power take-off shaft; And an oil pump; The coaxially arranged input shaft and output shaft are located at the middle position in the height direction of the gearbox cavity, the upper intermediate shaft is located at the upper position in the height direction of the gearbox cavity, the lower intermediate shaft is located at the lower position in the height direction of the gearbox cavity, the oil pump power take-off shaft is connected to the oil pump gear through the oil pump power take-off gear, and the oil pump gear is connected to the inner rotor of the oil pump through a transmission shaft; The support plate is provided with a first downward guiding oil path, the rear housing is provided with a second upward guiding oil path which is communicated to the corresponding oil collecting ring of the output shaft, the upper cover is provided with a first oil injection oil path and a third guiding oil path along the axial direction, the starting end of the first oil injection oil path is communicated to the first guiding oil path, the starting end of the third guiding oil path is communicated to the first guiding oil path, the front end plate of the main housing is provided with a fourth upward guiding oil path, the fourth guiding oil path is respectively communicated to the corresponding bearing positions above the lubricating oil level on the front end plate, the starting end of the fourth guiding oil path is communicated to the third guiding oil path, the first oil injection oil path is provided with a plurality of spray holes, a central diffusion oil path is formed between the input shaft and the output shaft, the central diffusion oil path comprises a central shaft oil path and a radial distribution oil path, the central diffusion oil path is communicated to the gears, spacers and bearings on the input shaft and the output shaft, the lubricating oil guided by the second guiding oil path is introduced into the central shaft oil path inlet by the oil collecting ring, and the lower intermediate shaft and the oil pump power take-off shaft are immersed below the lubricating oil level; An oil filter is arranged at the central position of the bottom of the gearbox housing assembly, the oil filter is connected to the oil inlet of the oil pump through a pipeline, and the oil outlets of all oil pumps are connected to the inlet of the first guiding oil path through a pipeline.

2. A lubrication system for a mine truck transmission according to claim 1, characterised in that: The oil filter is provided with an overflow valve.

3. A lubrication system for a mine truck transmission as claimed in claim 1, characterized in that: The main housing is provided with an oil filter maintenance window below the oil filter, and the oil filter maintenance window is a sealed cover plate structure.

4. A lubrication system for a mine truck transmission according to claim 1, characterized in that: The bottom of the main housing is further provided with an external cooling device below the oil pump, the oil pumped out by the oil pump is connected to the lubricating oil inlet of the external cooling device through a pipeline, and the lubricating oil outlet of the external cooling device is connected to the inlet of the first guiding oil path through a pipeline.

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