Hydraulic gear shifting transmission system of coal mine explosion-proof vehicle

Abstract

The invention provides a hydraulic gear shifting transmission system of a coal mine explosion-proof vehicle, which belongs to the technical field of mechanical transmission and comprises an explosion-proof diesel engine, a hydraulic torque converter, a planetary gearbox, a transfer case, a rear driving shaft and a front driving shaft. The hydraulic torque converter comprises a pump wheel, a guide wheel and a turbine, the pump wheel is driven by the explosion-proof diesel engine to rotate, the turbine is connected with an input shaft of the planetary gearbox, and the guide wheel is arranged between the pump wheel and the turbine and used for enhancing the output torque of the turbine; an output shaft of the planetary gearbox is connected with an input shaft of the transfer case, and an output shaft of the transfer case is connected with the rear driving shaft and the front driving shaft. The hydraulic gear shifting transmission system of the coal mine explosion-proof vehicle improves the situation that the gear cannot be engaged due to manual gear shifting, and meanwhile has the advantages of being compact in structure and high in transmission efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical transmission, and specifically discloses a hydraulic shift transmission system of a coal mine explosion-proof vehicle. Background Art

[0002] Since the underground tunnels of coal mines are narrow, the road conditions are complex, and the slope is large, the vehicle speed needs to be adjusted according to the road conditions at any time. Therefore, coal mine explosion-proof vehicles usually use manual shift gearboxes. When the manual shift gearbox is used for shifting, the main clutch must be separated, so the vehicle moves forward by inertia during the shifting process. After the coal mine explosion-proof vehicle uses a manual shift gearbox, sometimes the power of the explosion-proof diesel engine is not fully utilized when the low gear is engaged, and it is difficult to start the vehicle when the high gear is engaged. Summary of the invention

[0003] The invention provides a hydraulic shift transmission system for a coal mine explosion-proof vehicle, which improves the situation where a gear cannot be engaged due to manual shifting, and has the characteristics of compact structure and high transmission efficiency.

[0004] The hydraulic shift transmission system of a coal mine explosion-proof vehicle provided by the present invention comprises an explosion-proof diesel engine, a hydraulic torque converter, a planetary gearbox, a transfer case, a rear drive shaft and a front drive shaft; the hydraulic torque converter comprises a pump wheel, a guide wheel and a turbine, the pump wheel is driven to rotate by the explosion-proof diesel engine, the turbine is connected to the input shaft of the planetary gearbox, and the guide wheel is between the pump wheel and the turbine for enhancing the output torque of the turbine; the output shaft of the planetary gearbox is connected to the input shaft of the transfer case, and the output shaft of the transfer case is connected to the rear drive shaft and the front drive shaft.

[0005] In the hydraulic shift transmission system of the above-mentioned coal mine explosion-proof vehicle, the planetary gearbox includes an input shaft, an input clutch, a high-speed clutch, a high-speed brake, a reverse brake, a low-speed brake, a planetary gear mechanism and an output shaft; the planetary gear mechanism includes a front planetary carrier, a front inner gear ring, a rear inner gear ring, a rear sun gear, a rear planetary carrier and a front sun gear; the rear sun gear is located at the center of the rear inner gear ring, the rear sun gear and the rear inner gear ring are meshed through the rear planets on the rear planetary carrier, the front sun gear and the rear sun gear are independent, the front sun gear is located at the center of the front inner gear ring, the front sun gear and the front inner gear ring are meshed The ring is meshed with the front planets on the front planet carrier, the front inner gear ring and the rear planet carrier are integrated, and the front planet carrier and the rear inner gear ring are integrated; the input shaft of the planetary gearbox 3 is connected to the rear sun gear through the input clutch, and the input shaft is connected to the front inner gear ring and the rear planet carrier through the high gear clutch; the low speed brake is used to fix the front sun gear; the high speed brake is used to fix the rear sun gear; the reverse gear brake is used to fix the front inner gear ring and the rear planet carrier; the output shaft of the planetary gearbox 3 is integrated with the front planet carrier and the rear inner gear ring; the planetary gearbox is provided with P gear or N gear, R gear and 4 forward gears, among which

[0006] P or N gear: The input clutch works, driving the rear sun gear to rotate. There is no braking component in the planetary gear mechanism, the entire planetary gear mechanism idles, and there is no power output;

[0007] R gear: the input clutch works, driving the rear sun gear to rotate, the reverse brake works, fixing the front ring gear and the rear planetary carrier, and the front planetary carrier and the rear ring gear reversely reduce the output;

[0008] 1st gear: the input clutch works, driving the rear sun gear to rotate, the low-speed brake works, fixing the front sun gear, and the front planetary carrier and the rear inner gear ring reduce the output in the same direction;

[0009] 2nd gear: The high gear clutch works, driving the front inner gear ring and the rear planetary carrier to rotate, the low speed brake works, fixing the front sun gear, and the front planetary carrier and the rear inner gear ring reduce the output in the same direction;

[0010] 3rd gear: The high gear clutch works to drive the front inner gear ring and the rear planetary carrier to rotate. At the same time, the input clutch works to drive the rear sun gear to rotate. No parts in the planetary gear mechanism are fixed. The entire planetary gear mechanism outputs in the same direction and at the same speed as a whole. It is a direct transmission gear.

[0011] 4th gear: The high gear clutch works, driving the front inner gear ring and the rear planetary carrier to rotate, the high-speed brake works, fixing the rear sun gear, and the front planetary carrier and the rear inner gear ring increase the output speed in the same direction.

[0012] In the hydraulic shifting transmission system of the above-mentioned coal mine explosion-proof vehicle, the hydraulic torque converter 2 also includes a cooler, a pressure regulating valve, a circulating pump, a speed control valve and a safety valve; a hydraulic oil tank is arranged in the planetary gearbox 3; the oil inlet of the circulating pump is connected to the hydraulic oil tank, and the oil outlet is connected to the oil inlet of the pressure regulating valve; the oil outlet of the pressure regulating valve is respectively connected to the oil inlet of the pump wheel, the speed control valve and the oil inlet of the safety valve; the oil outlet of the speed control valve is connected to the hydraulic oil tank; the oil outlet of the safety valve is connected to the hydraulic oil tank; the turbine is connected to the oil inlet of the cooler, and the oil outlet of the cooler is connected to the hydraulic oil tank.

[0013] In the hydraulic shift transmission system of the above-mentioned coal mine explosion-proof vehicle, the input clutch and the high-speed clutch are multi-plate clutches; the high-speed brake, the reverse brake, and the low-speed brake are multi-plate brakes.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The power shift transmission in the hydraulic shift transmission system of the above-mentioned coal mine explosion-proof vehicle uses a clutch to combine two shift elements of the transmission, or uses a brake to brake a shift element to achieve shifting. Since the shifting action is achieved by the hydraulic system with the help of the power of the explosion-proof diesel engine, there is no situation where the gear cannot be engaged. The power shift transmission includes a fixed-axis power shift transmission and a planetary power shift transmission. For the narrow road conditions in coal mines, the use of a fixed-axis power shift transmission will lead to an increase in the vehicle's external dimensions. The planetary power shift transmission has the characteristics of compact structure and high transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a simplified structural diagram of the hydraulic shift transmission system of a coal mine explosion-proof vehicle;

[0018] Figure 2 It is a simplified diagram of the transmission principle of the torque converter;

[0019] Figure 3 This is the power transmission route map of the planetary gearbox.

[0020] In the figure: 1-explosion-proof diesel engine; 2-torque converter; 3-planetary gearbox; 4-transfer case; 5-rear drive shaft; 6-front drive shaft;

[0021] 2.1-turbine; 2.2-pump wheel; 2.3-cooler; 2.4-pressure regulating valve; 2.5-circulation pump; 2.6-speed control valve; 2.7 safety valve; 2.8-guide wheel;

[0022] B-input clutch; E-high gear clutch; C-high speed brake; D-reverse gear brake; F-low speed brake; 3.1-front planetary carrier; 3.2-front inner ring gear; 3.3-rear inner ring gear; 3.4-rear sun gear; 3.5-rear planetary carrier; 3.6-front sun gear; 3.7-hydraulic oil tank. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] This embodiment provides a hydraulic shift transmission system for a coal mine explosion-proof vehicle, including an explosion-proof diesel engine 1, a hydraulic torque converter 2, a planetary gearbox 3, a transfer case 4, a rear drive shaft 5 and a front drive shaft 6.

[0025] The hydraulic torque converter 2 includes a turbine 2.1, a pump wheel 2.2, a cooler 2.3, a pressure regulating valve 2.4, a circulating pump 2.5, a speed control valve 2.6, a safety valve 2.7 and a guide wheel 2.8. A hydraulic oil tank 3.7 is arranged in the planetary gearbox 3; the oil inlet of the circulating pump 2.5 is connected to the hydraulic oil tank 3.7, and the oil outlet is connected to the oil inlet of the pressure regulating valve 2.4; the oil outlet of the pressure regulating valve 2.4 is respectively connected to the oil inlet of the pump wheel 2.2, the speed control valve 2.6 and the oil inlet of the safety valve 2.7; the pump wheel 2.2 is welded to the housing of the hydraulic torque converter 2, and is driven to rotate by the explosion-proof diesel engine 1, so that the oil in the hydraulic torque converter 2 is thrown out to flow to the turbine 2.1 of the hydraulic torque converter 2, driving the hydraulic torque converter 2 to rotate. The turbine 2.1 rotates; the oil outlet of the speed control valve 2.6 is connected to the hydraulic oil tank 3.7; the oil outlet of the safety valve 2.7 is connected to the hydraulic oil tank 3.7; the turbine 2.1 is connected to the input shaft of the planetary gearbox 3, the turbine 2.1 is connected to the oil inlet of the cooler 2.3, and the oil outlet of the cooler 2.3 is connected to the hydraulic oil tank 3.7, so as to realize the circulation of oil in the torque converter 2; the guide wheel 2.8 is between the pump wheel 2.2 and the turbine 2.1 to enhance the output torque of the turbine 2.1. The torque converter 2 can be used to increase the torque of the explosion-proof diesel engine 1, the coupling effect and drive the oil pump of the planetary gearbox 3.

[0026] The output shaft of the planetary gearbox 3 is connected to the input shaft of the transfer case 4 , and the output shaft of the transfer case 4 is connected to the rear drive shaft 5 and the front drive shaft 6 .

[0027] The explosion-proof diesel engine 1 drives the pump wheel 2.2 of the hydraulic torque converter 2, converting the mechanical energy into the hydraulic energy of the working oil, so that the high-speed fluid pushes the turbine 2.1 of the hydraulic torque converter 2 to rotate and output power. The hydraulic torque converter 2 transmits the power to the planetary gearbox 3, and after the speed change, the power is distributed by the transfer case 4 and transmitted to the front and rear drive axles through the rear drive shaft 5 and the front drive shaft 6.

[0028] The planetary gearbox 3 includes an input shaft, an input clutch B, a high-speed clutch E, a high-speed brake C, a reverse brake D, a low-speed brake F, a planetary gear mechanism and an output shaft; the planetary gear mechanism includes a front planetary carrier 3.1, a front inner gear ring 3.2, a rear inner gear ring 3.3, a rear sun gear 3.4, a rear planetary carrier 3.5 and a front sun gear 3.6; the rear sun gear 3.4 is located at the center of the rear inner gear ring 3.3, the rear sun gear 3.4 and the rear inner gear ring 3.3 are meshed through the rear planets on the rear planetary carrier 3.5, the front sun gear 3.6 and the rear sun gear 3.4 are independent, the front sun gear 3.6 is located at the center of the front inner gear ring 3.2, the front sun gear 3.6 and the front The inner gear ring 3.2 is meshed with the front planets on the front planet carrier 3.1, the front inner gear ring 3.2 and the rear planet carrier 3.5 are integrated, and the front planet carrier 3.1 and the rear inner gear ring 3.3 are integrated; the input shaft of the planetary gearbox 3 is connected with the rear sun gear 3.4 through the input clutch B, and the input shaft is connected with the front inner gear ring 3.2 and the rear planet carrier 3.5 through the high gear clutch E; the low speed brake F is used to fix the front sun gear 3.6; the high speed brake C is used to fix the rear sun gear 3.4; the reverse gear brake D is used to fix the front inner gear ring 3.2 and the rear planet carrier 3.5; the output shaft of the planetary gearbox 3 is integrated with the front planet carrier 3.1 and the rear inner gear ring 3.3, and is the power output end.

[0029] Input clutch B and high gear clutch E are multi-plate clutches; high speed brake C, reverse gear brake D, and low speed brake F are multi-plate brakes. The combination and separation of two sets of multi-plate clutches and three sets of multi-plate brakes are realized by the oil of the planetary gearbox 3. Input clutch B and high gear clutch E can transmit the torque of the explosion-proof diesel engine 1 to the planetary gear mechanism to realize the input of the rear sun gear 3.4 or the front inner gear ring 3.2 / rear planetary carrier 3.5. The combination of brakes C, D, and F can fix the planetary gear mechanism. The combination of high speed brake C can fix the rear sun gear 3.4; the reverse gear brake D can fix the front inner gear ring 3.2 / rear planetary carrier 3.5; the combination of low speed brake F can fix the front sun gear 3.6.

[0030] The planetary gearbox 3 is provided with 5 gears, namely, P or N gear, 4 forward gears and 1 reverse gear, and can realize 4 forward gears and 1 reverse gear, a total of 5 different transmission ratios.

[0031] P or N gear: input clutch B works, driving the rear sun gear 3.4 to rotate, there is no brake component in the planetary gear mechanism, the entire planetary gear mechanism idles, and there is no power output. The power transmission route is: explosion-proof diesel engine 1-pump wheel 2.2 of torque converter 2-turbine 2.1-input shaft of planetary gearbox 3-input clutch B works-drives the rear sun gear 3.4 to rotate-planetary gear mechanism idles, and there is no power output.

[0032] R gear: input clutch B works, driving the rear sun gear 3.4 to rotate, reverse brake D works, fixing the front inner gear ring 3.2 and the rear planetary carrier 3.5, and the front planetary carrier 3.1 and the rear inner gear ring 3.3 are reversely decelerated for output. The power transmission route is: explosion-proof diesel engine 1-pump wheel 2.2 of torque converter 2-turbine 2.1-input shaft of planetary gearbox 3-input clutch B and reverse brake D work-drive the rear sun gear 3.4 to rotate, fixing the front inner gear ring 3.2 and the rear planetary carrier 3.5-front planetary carrier 3.1 and the rear inner gear ring 3.3 are reversely decelerated for output-transfer case 4-rear drive shaft 5, front drive shaft 6.

[0033] 1st gear: input clutch B works, driving the rear sun gear 3.4 to rotate, low-speed brake F works, fixing the front sun gear 3.6, and the front planetary carrier 3.1 and the rear inner ring gear 3.3 reduce the output in the same direction. The power transmission route is: explosion-proof diesel engine 1-pump wheel 2.2 of torque converter 2-turbine 2.1-input shaft of planetary gearbox 3-input clutch B works, low-speed brake F works-drive the rear sun gear 3.4 to rotate, fix the front sun gear 3.6-front planetary carrier 3.1 and the rear inner ring gear 3.3 reduce the output in the same direction-transfer case 4-rear drive shaft 5, front drive shaft 6.

[0034] 2nd gear: high gear clutch E works, driving the front inner gear ring 3.2 and the rear planetary carrier 3.5 to rotate, low speed brake F works, fixing the front sun gear 3.6, and the front planetary carrier 3.1 and the rear inner gear ring 3.3 are output in the same direction of deceleration. The power transmission route is: explosion-proof diesel engine 1-pump wheel 2.2 of torque converter 2-turbine 2.1-input shaft of planetary gearbox 3-high gear clutch E works, low speed brake F works-driving the front inner gear ring 3.2 and the rear planetary carrier 3.5 to rotate, fixing the front sun gear 3.6-front planetary carrier 3.1 and the rear inner gear ring 3.3 are output in the same direction of deceleration-transfer case 4-rear drive shaft 5, front drive shaft 6.

[0035] 3rd gear: high gear clutch E works, driving the front inner gear ring 3.2 and the rear planetary carrier 3.5 to rotate, and at the same time, input clutch B works, driving the rear sun gear 3.4 to rotate. No parts in the planetary gear mechanism are fixed, and the entire planetary gear mechanism outputs in the same direction and at the same speed as a whole, which is a direct transmission gear. The power transmission route is: explosion-proof diesel engine 1-pump wheel 2.2 of torque converter 2-turbine 2.1-input shaft of planetary gearbox 3-high gear clutch E works, input clutch B works-drive the front inner gear ring 3.2 and the rear planetary carrier 3.5 to rotate, and drive the rear sun gear 3.4 to rotate at the same time-front planetary carrier 3.1 and rear inner gear ring 3.3 output in the same direction and at the same speed-transfer case 4-rear drive shaft 5, front drive shaft 6.

[0036] 4th gear: high gear clutch E works, driving the front ring gear 3.2 and the rear planetary carrier 3.5 to rotate, high speed brake C works, fixing the rear sun gear 3.4, and the front planetary carrier 3.1 and the rear ring gear 3.3 increase the output in the same direction. The power transmission route is: explosion-proof diesel engine 1-pump wheel 2.2 of torque converter 2-turbine 2.1-input shaft of planetary gearbox 3-high gear clutch E works, high speed brake C works-drive the front ring gear 3.2 and the rear planetary carrier 3.5 to rotate, fix the rear sun gear 3.4-front planetary carrier 3.1 and the rear ring gear 3.3 increase the output in the same direction-transfer case 4-rear drive shaft 5, front drive shaft 6.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic shift transmission system for a coal mine explosion-proof vehicle, characterized in that: It comprises an explosion-proof diesel engine (1), a hydraulic torque converter (2), a planetary gearbox (3), a transfer case (4), a rear drive shaft (5) and a front drive shaft (6); The hydraulic torque converter (2) comprises a pump wheel (2.2), a guide wheel (2.8), and a turbine (2.1); the pump wheel (2.2) is driven to rotate by an explosion-proof diesel engine (1); the turbine (2.1) is connected to the input shaft of a planetary gearbox (3); the guide wheel (2.8) is located between the pump wheel (2.2) and the turbine (2.1) and is used to enhance the output torque of the turbine (2.1); the output shaft of the planetary gearbox (3) is connected to the input shaft of a transfer case (4); and the output shaft of the transfer case (4) is connected to a rear drive shaft (5) and a front drive shaft (6).

2. The hydraulic shift transmission system for coal mine explosion-proof vehicles according to claim 1, characterized in that: The planetary gearbox (3) comprises an input shaft, an input clutch (B), a high gear clutch (E), a high speed brake (C), a reverse gear brake (D), a low speed brake (F), a planetary gear mechanism and an output shaft; The planetary gear mechanism comprises a front row planet carrier (3.1), a front row inner gear ring (3.2), a rear row inner gear ring (3.3), a rear row sun gear (3.4), a rear row planet carrier (3.5) and a front row sun gear (3.6); The rear sun gear (3.4) is located at the center of the rear inner gear ring (3.3), the rear sun gear (3.4) and the rear inner gear ring (3.3) are meshed through the rear planets on the rear planet carrier (3.5), the front sun gear (3.6) and the rear sun gear (3.4) are independent, the front sun gear (3.6) is located at the center of the front inner gear ring (3.2), the front sun gear (3.6) and the front inner gear ring (3.2) are meshed through the front planets on the front planet carrier (3.1), the front inner gear ring (3.2) and the rear planet carrier (3.5) are integrated, and the front planet carrier (3.1) and the rear inner gear ring (3.3) are integrated; The input shaft of the planetary gearbox (3) is connected to the rear sun gear (3.4) through an input clutch (B), and the input shaft is connected to the front inner gear ring (3.2) and the rear planet carrier (3.5) through a high gear clutch (E); The low speed brake (F) is used to fix the front sun gear (3.6); The high-speed brake (C) is used to fix the rear sun gear (3.4); The reverse brake (D) is used to fix the front ring gear (3.2) and the rear planetary carrier (3.5); The output shaft of the planetary gearbox (3) is integrated with the front planet carrier (3.1) and the rear inner gear ring (3.3); The planetary gearbox (3) is provided with a P gear or an N gear, an R gear and four forward gears, wherein in the P gear or the N gear: the input clutch (B) works to drive the rear sun gear (3.4) to rotate, there is no braking component in the planetary gear mechanism, the entire planetary gear mechanism idles, and there is no power output; R gear: the input clutch (B) works, driving the rear sun gear (3.4) to rotate, the reverse brake (D) works, fixing the front inner ring gear (3.2) and the rear planetary carrier (3.5), and the front planetary carrier (3.1) and the rear inner ring gear (3.3) are reversed to reduce the output; 1st gear: the input clutch (B) works, driving the rear sun gear (3.4) to rotate, the low-speed brake (F) works, fixing the front sun gear (3.6), and the front planetary carrier (3.1) and the rear inner ring gear (3.3) reduce the output in the same direction; 2nd gear: The high gear clutch (E) works, driving the front ring gear (3.2) and the rear planetary carrier (3.5) to rotate, the low speed brake (F) works, fixing the front sun gear (3.6), and the front planetary carrier (3.1) and the rear ring gear (3.3) reduce the output in the same direction; 3rd gear: The high gear clutch (E) works to drive the front inner ring gear (3.2) and the rear planetary carrier (3.5) to rotate. At the same time, the input clutch (B) works to drive the rear sun gear (3.4) to rotate. No parts in the planetary gear mechanism are fixed. The entire planetary gear mechanism outputs in the same direction and at the same speed as a whole. This is a direct transmission gear. 4th gear: The high gear clutch (E) works, driving the front inner ring gear (3.2) and the rear planetary carrier (3.5) to rotate, the high speed brake (C) works, fixing the rear sun gear (3.4), and the front planetary carrier (3.1) and the rear inner ring gear (3.3) increase the output in the same direction.

3. The hydraulic shift transmission system for coal mine explosion-proof vehicles according to claim 1, characterized in that: The hydraulic torque converter (2) also includes a cooler (2.3), a pressure regulating valve (2.4), a circulating pump (2.5), a speed control valve (2.6) and a safety valve (2.7); A hydraulic oil tank (3.7) is arranged in the planetary gearbox (3); The oil inlet of the circulation pump (2.5) is connected to the hydraulic oil tank (3.7), and the oil outlet is connected to the oil inlet of the pressure regulating valve (2.4); The oil outlet of the pressure regulating valve (2.4) is respectively connected to the oil inlet of the pump wheel (2.2), the oil inlet of the speed control valve (2.6) and the oil inlet of the safety valve (2.7); The oil outlet of the speed control valve (2.6) is connected to the hydraulic oil tank (3.7); The oil outlet of the safety valve (2.7) is connected to the hydraulic oil tank (3.7); The turbine (2.1) is connected to the oil inlet of the cooler (2.3), and the oil outlet of the cooler (2.3) is connected to the hydraulic oil tank (3.7).

4. The hydraulic shift transmission system for coal mine explosion-proof vehicles according to claim 2, characterized in that: The input clutch (B) and high-speed clutch (E) are multi-plate clutches; The high speed brake (C), reverse brake (D) and low speed brake (F) are multi-disc brakes.

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