A six-speed transmission with high and low gear grouping

Abstract

The present invention discloses a six-speed transmission with high and low gear grouping, comprising: an input shaft, an intermediate shaft, an output shaft, a clutch, a fixed gear, a brake, an idler gear and a planetary gear train, wherein the clutch comprises a first clutch, a second clutch, a third clutch and a fourth clutch, the intermediate shaft comprises a first intermediate shaft, a second intermediate shaft, a third intermediate shaft and a fourth intermediate shaft, the fixed gear comprises a first fixed gear, a second fixed gear, a third fixed gear, a fourth fixed gear, a fifth fixed gear, a sixth fixed gear and a seventh fixed gear, the idler gear comprises a first idler gear, a second idler gear and a third idler gear, and the planetary gear train comprises a sun gear, a planetary gear, an inner ring gear and a planetary carrier; the braking of the low speed gear and the high speed gear of the transmission of the present invention respectively adopts two independent brakes, the power transmission is clearer, the operation during gear shifting is simpler and more convenient, and the shortcomings of the existing domestic fracturing truck transmission are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of transmissions, and in particular to a six-speed transmission with high and low gear grouping. Background Art

[0002] As an important equipment in the oil and gas extraction process, the fracturing truck is used to transport fracturing fluid to the designated location and inject the fracturing fluid into the rock formation, so that the relatively intact rock formation is fractured, the pores are increased, and the oil and gas production is increased. In order to obtain high-pressure fracturing fluid (usually water), the engine output power is decelerated and torque-increased through the gearbox to drive the fracturing pump to pump the fracturing fluid into the well. Summary of the Invention

[0003] The present invention provides a six-speed transmission with high and low gear groups, which solves the problems existing in the transmission on the above-mentioned fracturing vehicle.

[0004] A six-speed transmission with high and low gear grouping arrangement includes: an input shaft, an intermediate shaft, an output shaft, a clutch, a fixed gear, an idler gear and a planetary gear train;

[0005] The intermediate shafts include a first intermediate shaft, a second intermediate shaft, a third intermediate shaft, and a fourth intermediate shaft; the clutches include a first clutch, a second clutch, a third clutch, and a fourth clutch; the fixed gears include a first fixed gear, a second fixed gear, a third fixed gear, a fourth fixed gear, a fifth fixed gear, a sixth fixed gear, and a seventh fixed gear; and the idler gears include a first idler gear, a second idler gear, and a third idler gear;

[0006] The first fixed gear, the second clutch, and the first idler gear are arranged on the input shaft, the second fixed gear, the first clutch, and the second idler gear are arranged on the first intermediate shaft, the third fixed gear, the fourth fixed gear, and the fifth fixed gear are fixed on the second intermediate shaft, and the sixth fixed gear, the third clutch, and the third idler gear are arranged on the third intermediate shaft.

[0007] A seventh fixed gear is provided on the fourth intermediate shaft, and the fourth intermediate shaft is connected to the planetary gear train;

[0008] The planetary gear train is connected to the output shaft, and the axes of the input shaft and the output shaft coincide with each other.

[0009] Furthermore, the above-mentioned planetary gear system includes a sun gear, planetary gears, an inner ring gear and a planet carrier. The sun gear and the planetary gears are both arranged on the inner side of the inner ring gear and positioned by the planet carrier. The planetary gears are respectively engaged with the sun gear and the inner ring gear. The inner ring gear is also provided with a fourth clutch and a brake.

[0010] Furthermore, the first fixed gear meshes with the second idler gear, the first idler gear meshes with the second fixed gear, the second fixed gear meshes with the fourth fixed gear, the first fixed gear meshes with the third idler gear, the sixth fixed gear meshes with the third fixed gear, and the fifth fixed gear meshes with the seventh fixed gear.

[0011] Furthermore, the above-mentioned clutch is a hydraulic coupling.

[0012] The present invention has the following beneficial effects:

[0013] (1) The transmission of the present invention is designed according to high and low gear groups. The low-speed gears of the first, second and third gears are controlled by brakes, and the high-speed gears of the fourth, fifth and sixth gears are controlled by clutches in the planetary gear system, making the gear shifting operation simpler and more convenient, and the control is also easier.

[0014] (2) In the transmission of the present invention, only one clutch is provided on each input shaft, intermediate shaft and output shaft, thereby improving the reliability of the clutch in controlling the power transmission.

[0015] (3) The shaft in the transmission of the present invention is shorter and has better rigidity. In addition, the length of the oil delivery hole on the shaft is significantly reduced compared to the hole length of the traditional dual-clutch structure, making it easier to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the transmission structure of the transmission of the present invention;

[0017] In the figure: Ⅰ-input shaft; Ⅱ-first intermediate shaft; Ⅲ-second intermediate shaft; Ⅳ-third intermediate shaft; Ⅴ-fourth intermediate shaft; Ⅵ-output shaft; C1-first clutch; C2-second clutch; C3-third clutch; C4-fourth clutch; B1-brake; 1-first fixed gear; 4-second fixed gear; 5-third fixed gear; 6-fourth fixed gear; 8-fifth fixed gear; 9-sixth fixed gear; 11-seventh fixed gear; 2-first idler gear; 3-second idler gear; 10-third idler gear; 12-sun gear; 13-planet gears; 14-inner ring gear; 15-planet carrier. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] refer to Figure 1 The present invention provides a six-speed transmission with high and low gear grouping, comprising: an input shaft I, an intermediate shaft, an output shaft VI, a clutch, a fixed gear, an idler gear and a planetary gear train; the axes of the input shaft I and the output shaft VI coincide, that is, the axes are on the same straight line.

[0020] The clutches include a first clutch C1, a second clutch C2, a third clutch C3 and a fourth clutch C4. The clutches are preferably friction clutches, preferably hydraulic couplings.

[0021] The intermediate shafts include a first intermediate shaft II, a second intermediate shaft III, a third intermediate shaft IV and a fourth intermediate shaft V.

[0022] The fixed gears include a first fixed gear 1 , a second fixed gear 4 , a third fixed gear 5 , a fourth fixed gear 6 , a fifth fixed gear 8 , a sixth fixed gear 9 , and a seventh fixed gear 11 .

[0023] The idler gears include a first idler gear 2 , a second idler gear 3 and a third idler gear 10 .

[0024] The planetary gear train includes a sun gear 12 , planetary gears 13 , an inner ring gear 14 and a planet carrier 15 , and the planetary gears 13 function as a decelerator.

[0025] The first fixed gear 1, the second clutch C2 and the first idler gear 2 are arranged on the input shaft I. The first fixed gear 1 moves synchronously with the input shaft I. The second clutch C2 is connected to the first idler gear 2. When the second clutch C2 is closed, the friction plate on the second clutch C2 is pressed, so that the first idler gear 2 and the input shaft I are connected as a whole. There is no relative rotation between the input shaft I and the first idler gear 2, and they move synchronously; when the second clutch C2 is disengaged, the first idler gear 2 does not move with the input shaft I.

[0026] The second fixed gear 4, the first clutch C1 and the second idler gear 3 are arranged on the first intermediate shaft II. The second fixed gear 4 moves synchronously with the first intermediate shaft II. When the first clutch C1 is closed, the second idler gear 3 moves synchronously with the first intermediate shaft II. When the first clutch C1 is disengaged, the second idler gear 3 can rotate freely around the first intermediate shaft II without being affected by the first intermediate shaft II.

[0027] The first fixed gear 1 is constantly meshed with the second idler gear 3 , and the first idler gear 2 is constantly meshed with the second fixed gear 4 .

[0028] The third fixed gear 5 , the fourth fixed gear 6 , and the fifth fixed gear 8 are fixed on the second intermediate shaft III and move synchronously with the second intermediate shaft III. The fourth fixed gear 6 is located between the third fixed gear 5 and the fifth fixed gear 8 and is constantly meshed with the second fixed gear 4 .

[0029] The sixth fixed gear 9, the third clutch C3, and the third idler gear 10 are disposed on the third intermediate shaft IV. The sixth fixed gear 9 moves synchronously with the third intermediate shaft IV. When the third clutch C3 is engaged, the third idler gear 10 does not rotate relative to the third intermediate shaft IV and moves independently of the third intermediate shaft IV. When the third clutch C3 is disengaged, the third idler gear 10 is not affected by the movement of the third intermediate shaft IV. Furthermore, the first fixed gear 1 is constantly meshed with the third idler gear 10, and the sixth fixed gear 9 is constantly meshed with the third fixed gear 5.

[0030] A seventh fixed gear 11 is provided on the fourth intermediate shaft V, and the fifth fixed gear 8 is constantly meshed with the seventh fixed gear 11. An end of the fourth intermediate shaft V away from the seventh fixed gear 11 is connected to a sun gear 12, and both the seventh fixed gear 11 and the sun gear 12 move synchronously with the fourth intermediate shaft V.

[0031] The sun gear 12 is meshed with a planetary gear 13, which is also meshed with an inner ring gear 14. That is, the planetary gear 13 is meshed with both the sun gear 12 and the inner ring gear 14. A brake B1 is mounted on the inner ring gear 14. When the brake B1 is closed, the inner ring gear 14 is fixed to the frame. When the brake B1 is disconnected, the inner ring gear 14 is not constrained by the frame and rotates with the planetary gear 14. The brake B1 can be a disc brake or a caliper brake.

[0032] The sun gear 12 is connected to the planet carrier 15 via the fourth clutch C4. When the fourth clutch C4 is closed, the planet carrier 15 and the sun gear 12 move synchronously. When the fourth clutch C4 is opened, the movements of the sun gear 12 and the planet carrier 15 interfere with each other.

[0033] The planet carrier 15 is fixedly connected to the output shaft VI, and the transmitted power is outputted through the output shaft VI.

[0034] In the transmission of the present invention, brake B1 is introduced to control the low-speed gears of first gear, second gear and third gear, and fourth clutch C4 is introduced to control the high-speed gears of fourth gear, fifth gear and sixth gear. Two independent brakes are used for braking the low-speed gear and the high-speed gear respectively, and the same brake is used to control power transmission in adjacent gears of low gear and high gear, making the gear shifting operation more simple and convenient and easier to control.

[0035] The power transmission routes of each gear in the present invention are as follows:

[0036] First gear: The first clutch C1 and the brake B1 are closed, the other clutches are disengaged, and the ring gear 14 is fixed; power is transmitted from the input shaft I in sequence to the first fixed gear 1, the second idler gear 3, the first clutch C1, the first intermediate shaft II, the second fixed gear 4, the fourth fixed gear 6, the fifth fixed gear 8, the seventh fixed gear 11, the fourth intermediate shaft V, the sun gear 12, the planetary gears 13, the planetary carrier 15, and then the planetary carrier 15 is transmitted to the output shaft VI.

[0037] Second gear: The second clutch C2 and the brake B1 are closed, and the other clutches are disengaged; power is transmitted from the input shaft I in sequence to the first fixed gear 1, the first idler gear 2, the second fixed gear 4, the fourth fixed gear 6, the second intermediate shaft III, the fifth fixed gear 8, the seventh fixed gear 11, the fourth intermediate shaft V, the sun gear 12, the planetary gears 13, the planetary carrier 15, and then the planetary carrier 15 is transmitted to the output shaft VI.

[0038] Third gear: The third clutch C3 and the brake B1 are closed, and the other clutches are disengaged; power is transmitted from the input shaft I to the first fixed gear 1, the third idler gear 10, the third intermediate shaft IV, the sixth fixed gear 9, the third fixed gear 5, the second intermediate shaft III, the fifth fixed gear 8, the seventh fixed gear 11, the fourth intermediate shaft V, the sun gear 12, the planetary gears 13, the planetary carrier 15, and then to the output shaft VI.

[0039] Fourth gear: The first clutch C1 and the fourth clutch C4 are closed, and the brake B1 and the other clutches are disengaged; power is transmitted from the input shaft I in sequence to the first fixed gear 1, the second idler gear 3, the first clutch C1, the first intermediate shaft II, the second fixed gear 4, the fourth fixed gear 6, the second intermediate shaft III, the fifth fixed gear 8, the seventh fixed gear 11, the fourth intermediate shaft V, the sun gear 12, the planetary carrier 15, and the output shaft VI.

[0040] Fifth gear: The second clutch C2 and the fourth clutch C4 are closed, and the brake B1 and the other clutches are disengaged; power is transmitted from the input shaft I to the first fixed gear 1, the first idler gear 2, the second fixed gear 4, the fourth fixed gear 6, the second intermediate shaft III, the fifth fixed gear 8, the seventh fixed gear 11, the fourth intermediate shaft V, the sun gear 12, the planetary carrier 15, and the output shaft VI in this order.

[0041] Sixth gear: The third clutch C3 and the fourth clutch C4 are closed, and the brake B1 and the other clutches are disengaged; power is transmitted from the input shaft I to the first fixed gear 1, the third idler gear 10, the third intermediate shaft IV, the sixth fixed gear 9, the third fixed gear 5, the second intermediate shaft III, the fifth fixed gear 8, the seventh fixed gear 11, the fourth intermediate shaft V, the sun gear 12, the planetary carrier 15, and the output shaft VI in this order.

[0042] Power is input from input shaft I and output from output shaft VI, achieving six gears. The power transmission routes of each gear are shown in the table below:

[0043]

[0044] The above descriptions are merely preferred embodiments of the present invention. These embodiments do not represent all possible forms of the present invention, and the scope of protection of the present invention is not limited to such specific descriptions and embodiments. Various other modifications and improvements may be made based on the technical teachings disclosed herein without departing from the essence of the present invention, and such modifications and improvements remain within the scope of protection of the present invention.

Claims

1. A six-speed transmission with high and low gear grouping, characterized in that: include: Input shaft (I), intermediate shaft, output shaft (VI), clutch, fixed gear, idler gear and planetary gear train; The intermediate shaft includes a first intermediate shaft (II), a second intermediate shaft (III), a third intermediate shaft (IV) and a fourth intermediate shaft (V); the clutch includes a first clutch (C1), a second clutch (C2), a third clutch (C3) and a fourth clutch (C4); the fixed gear includes a first fixed gear (1), a second fixed gear (4), a third fixed gear (5), a fourth fixed gear (6), a fifth fixed gear (8), a sixth fixed gear (9) and a seventh fixed gear (11); the idler gear includes a first idler gear (2), a second idler gear (3) and a third idler gear (10); The first fixed gear (1), the second clutch (C2) and the first idler gear (2) are arranged on the input shaft (I), the second fixed gear (4), the first clutch (C1) and the second idler gear (3) are arranged on the first intermediate shaft (II), the third fixed gear (5), the fourth fixed gear (6) and the fifth fixed gear (8) are fixed on the second intermediate shaft (III), and the sixth fixed gear (9), the third clutch (C3) and the third idler gear (10) are arranged on the third intermediate shaft (IV); The seventh fixed gear (11) is provided on the fourth intermediate shaft (V), and the fourth intermediate shaft (V) is connected to the planetary gear train; The planetary gear train is connected to the output shaft (VI), and the axes of the input shaft (I) and the output shaft (VI) coincide with each other; The planetary gear train comprises a sun gear (12), planetary gears (13), an inner gear ring (14) and a planet carrier (15). The sun gear (12) and the planetary gears (13) are both arranged on the inner side of the inner gear ring (14) and positioned by the planet carrier (15). The planetary gears (13) are respectively engaged with the sun gear (12) and the inner gear ring (14). The inner gear ring (14) is also provided with the fourth clutch (C4) and the brake (B1).

2. The six-speed transmission with high and low gear grouping according to claim 1, characterized in that: The first fixed gear (1) is meshed with the second idler gear (3), the first idler gear (2) is meshed with the second fixed gear (4), the second fixed gear (4) is meshed with the fourth fixed gear (6), the first fixed gear (1) is meshed with the third idler gear (10), the sixth fixed gear (9) is meshed with the third fixed gear (5), and the fifth fixed gear (8) is meshed with the seventh fixed gear (11).

3. The six-speed transmission with high and low gear grouping according to any one of claims 1 to 2, characterized in that: The clutch is a fluid coupling.

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