Dual power take-off device and control method thereof

Abstract

This invention belongs to the field of transmission and discloses a dual power take-off device and its control method. The device includes a motor, the output end of which is connected to an input shaft. A first input shaft gear, a second input shaft gear, and a third input shaft gear are rigidly connected on the input shaft. The first input shaft gear meshes with a first gear and a fourth gear on both sides, respectively. The first gear meshes with the second gear. A two-stage reduction gear (first and second gears) acts on a first output flange, and a one-stage reduction gear (fourth gear) acts on a second output flange. The first and second output flanges rotate in opposite directions and are both used to connect to a hydraulic pump load. The input end of the motor is connected to a motor controller. This device can output speeds in two different rotational directions, meeting the working requirements of pumps with different rotational directions. Each output power path has two speed ratio settings, allowing for precise adjustment of the output power according to the actual needs of different hydraulic pumps, improving working efficiency and stability.

Description

Technical Field

[0001] This invention belongs to the field of transmission technology and relates to a dual power take-off device and its control method. Background Technology

[0002] In recent years, the market penetration rate of new energy pure electric loaders has shown a continuous upward trend. Compared with traditional fuel-powered loaders, new energy pure electric loaders have many advantages such as zero emissions, low noise, and low operating costs. More and more construction projects are beginning to choose new energy pure electric loaders to meet environmental protection requirements and reduce operating costs.

[0003] In traditional systems, significant energy losses occur during the flow of hydraulic oil, such as pressure loss along the flow path and localized pressure loss, which reduces transmission efficiency. Furthermore, the relatively simple control methods of traditional hydraulic systems make it difficult to achieve precise flow and pressure control. This results in the hydraulic pump's output energy not being fully utilized under partial load conditions, further increasing energy consumption.

[0004] Furthermore, a design typically employs a single power source connected in series with multiple hydraulic pumps. While this simplifies the system structure to some extent, it leads to mutual interference, causing instability in system pressure and flow. If one hydraulic pump fails, it can affect the normal operation of the entire system, reducing reliability and maintainability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a dual power take-off device and its control method, which uses dual output power to achieve output speeds in two different rotational directions to meet the needs of different hydraulic pumps.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a dual power take-off device, including a motor. The output end of the motor is connected to an input shaft. The input shaft is provided with a rigidly connected first input shaft gear, a second input shaft gear, and a third input shaft gear. The first input shaft gear meshes with a first gear and a fourth gear on both sides, respectively. The first gear meshes with the second gear. The first output flange is reduced by two stages of speed reduction through the first and second gears, and the second output flange is reduced by one stage of speed reduction through the fourth gear. The first and second output flanges rotate in opposite directions and are both used to connect to a hydraulic pump load. The input end of the motor is connected to a motor controller.

[0008] Furthermore, the first gear is sleeved on one end of the first intermediate shaft, and the third gear is installed on the other end of the first intermediate shaft. The first gear, the first intermediate shaft, and the third gear are rigidly connected. The third gear, the second input shaft gear, and the first output shaft gear mesh with each other. The first output shaft gear is rigidly connected to the second sliding sleeve engagement teeth and floats on the first output shaft.

[0009] Furthermore, the second gear is sleeved on one end of the second intermediate shaft, and the other end of the second intermediate shaft is equipped with the first sliding sleeve engagement tooth. The second gear, the second intermediate shaft, and the first sliding sleeve engagement tooth are rigidly connected. The input end of the first output flange is connected to the first output shaft, and is rigidly connected to the C1 sliding sleeve spline through the first output shaft.

[0010] Furthermore, a C1 sliding sleeve is fitted onto the C1 sliding sleeve spline; the C1 sliding sleeve is fitted onto the C1 sliding sleeve spline and can move axially.

[0011] Furthermore, the fourth gear is sleeved on one end of the third intermediate shaft, and the other end of the third intermediate shaft is equipped with a third sliding sleeve engaging tooth, and the fourth gear, the third intermediate shaft, and the third sliding sleeve engaging tooth are rigidly connected.

[0012] Furthermore, a C2 sliding sleeve is fitted onto the C2 sliding sleeve spline; the C2 sliding sleeve is fitted onto the C2 sliding sleeve spline and moves axially.

[0013] Furthermore, the third input shaft gear is rigidly connected to the constant gear of the second output shaft; the constant gear of the second output shaft is rigidly connected to the fourth sliding sleeve engagement gear, and floats on the second output shaft.

[0014] The present invention also provides a control method for a dual power take-off device, which, based on the above-mentioned dual power take-off device, includes the following steps: acquiring a load request signal from a first output flange, and obtaining a first target speed M of the motor. N1 ;

[0015] Acquire the load request signal from the second output flange to obtain the second target speed M of the motor. N2 ;

[0016] The first target speed M of the motor N1 With the second target speed M of the motor N2 The smaller value is selected as the target motor speed; the target motor speed is then input to the motor controller to drive the motor.

[0017] Furthermore, the first target rotational speed M N1 This includes the first target speed in first gear and the first target speed in second gear;

[0018] The first target speed is: PTO N1 ×i c11

[0019] The first target second gear speed is: PTO N1 ×i c12

[0020] Among them, PTO N1 i is the target value for the first output flange speed. c11 When C1 slide sleeve is in the first position, i represents the total speed ratio of the transmission path from the motor to the first output flange. c12 When the C1 sliding sleeve is in the second position, the total speed ratio of the transmission path from the motor to the first output flange;

[0021] The second target rotational speed M N1 This includes the first gear speed of the second target and the second gear speed of the second target;

[0022] The second target speed is: PTO N2 ×i c21

[0023] The first target second gear speed is: PTO N2 ×i c22

[0024] Among them, PTO N2 i is the target value for the second output flange speed. c21 When the C2 sliding sleeve is in the first position, i represents the total speed ratio of the transmission path from the motor to the second output flange. c22 This refers to the total speed ratio of the transmission path from the motor to the second output flange when the C2 sliding sleeve is in the second gear position.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] This invention discloses a dual power take-off device with a dual-output structure that can output speeds in two different directions of rotation, meeting the working requirements of pumps with different rotation directions without the need for additional complex steering conversion devices. The dual-output design can significantly reduce the suspension weight and extension length caused by multiple hydraulic pumps connected in series. Each output power path is equipped with two speed ratio gears, which can precisely adjust the output power according to the actual needs of different hydraulic pumps, thereby improving working efficiency and stability.

[0027] This invention discloses a dual power take-off device. The motor is a high-speed, low-torque motor. The gearbox reduces the high-speed rotational motion output by the motor through gear transmission and amplifies the torque. After conversion by the gearbox, the final output torque can easily meet the requirements of various high-load and high-precision operations. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a dual power take-off device according to the present invention;

[0029] Figure 2 This is a transmission route diagram for a dual power take-off device operating in mode 0 according to an embodiment of the present invention;

[0030] Figure 3 This is a transmission route diagram for a dual power take-off device operating in mode 1 according to an embodiment of the present invention;

[0031] Figure 4 This is a transmission route diagram for a dual power take-off device operating in mode 2 according to an embodiment of the present invention;

[0032] Figure 5 This is a transmission route diagram for a dual power take-off device operating mode 3 in an embodiment of the present invention;

[0033] Figure 6 This is a transmission route diagram for a dual power take-off device operating mode 4 in an embodiment of the present invention;

[0034] Figure 7 This is a transmission route diagram for a dual power take-off device operating mode 5 in an embodiment of the present invention;

[0035] Figure 8 This is a transmission route diagram for a dual power take-off device operating mode 6 in an embodiment of the present invention;

[0036] Figure 9 This is a transmission route diagram for a dual power take-off device operating mode 7 in an embodiment of the present invention;

[0037] Figure 10 This is a transmission route diagram for a dual power take-off device operating mode 8 in an embodiment of the present invention.

[0038] Figure label:

[0039] 1-Motor; 2-First gear; 3-First intermediate shaft; 4-Second gear; 5-Second intermediate shaft; 6-First sliding sleeve engagement gear; 7-C1 sliding sleeve spline; 8-C1 sliding sleeve; 9-Second sliding sleeve engagement gear; 10-First output shaft constant gear; 11-First output shaft; 12-First output flange; 13-Third gear; 14-Second input shaft gear; 15-Third input shaft gear; 16-Second output shaft; 17-Second output flange; 18-Second output shaft constant gear; 19-Fourth sliding sleeve engagement gear; 20-C2 sliding sleeve spline; 21-C2 sliding sleeve; 22-Third sliding sleeve engagement gear; 23-Third intermediate shaft; 24-Fourth gear; 25-First input shaft gear; 26-Input shaft; 27-Motor controller. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0041] Example 1

[0042] This invention provides a dual power take-off device, such as... Figure 1 As shown, the device includes: a motor 1, the output end of which is connected to an input shaft 26. The input shaft 26 is provided with a rigidly connected first input shaft gear 25, a second input shaft gear 14, and a third input shaft gear 15. The first input shaft gear 25 meshes with a first gear 2 and a fourth gear 24 on both sides, and the first gear 2 meshes with the second gear 4. The first output flange 12 is reduced by two stages of speed reduction through the first gear 2 and the second gear 4, and the second output flange 17 is reduced by one stage of speed reduction through the fourth gear 24. The first output flange 12 and the second output flange 17 rotate in opposite directions and are both used to connect to the hydraulic pump load. The input end of the motor 1 is connected to a motor controller 27.

[0043] Specifically, the input terminal of motor 1 is connected to motor controller 27. The first output flange load request sensor and the second output flange load request sensor respectively input electrical signals to the vehicle controller through wires. The vehicle controller inputs electrical signals to motor controller 27 through wires. Motor controller 27 is connected to motor 1 through high-voltage copper wire and outputs high voltage and current to motor 1.

[0044] The output end of motor 1 is connected to input shaft 26, which is rigidly connected to first input shaft gear 25, second input shaft gear 14, and third input shaft gear 15 respectively. These gears are installed sequentially from left to right. First input shaft gear 25 meshes with first gear 2 and fourth gear 24 respectively. First gear 2 meshes with second gear 4, and is also rigidly connected to third gear 13 via first intermediate shaft 3. Third gear 13 meshes with second input shaft gear 14 and first output shaft constant gear 10. First output shaft constant gear 10 is rigidly connected to second sliding sleeve engagement gear 9 and floats on first output shaft 11. The input end of first output shaft 11 is connected to C1 sliding sleeve spline 7, and C1 sliding sleeve 8 is fitted onto C1 sliding sleeve spline 7. Second gear 4 is installed at the input end of second intermediate shaft 5, and the output end of second intermediate shaft 5 is connected to first sliding sleeve engagement gear 6.

[0045] The fourth gear 24 is installed at the input end of the third intermediate shaft 23, and its output end is connected to the third sliding sleeve engagement gear 22. The fourth gear 24, the third intermediate shaft 23, and the third sliding sleeve engagement gear 22 are rigidly connected. The third input shaft gear 15 is rigidly connected to the constant gear 18 of the second output shaft, and the constant gear 18 of the second output shaft is rigidly connected to the fourth sliding sleeve engagement gear 19. It floats on the second output shaft 16. The input end of the second output flange 17 is connected to the second output shaft 16, and is rigidly connected to the C2 sliding sleeve spline 20 through the second output shaft 16. The C2 sliding sleeve 21 is fitted on the C2 sliding sleeve spline 20 and moves axially.

[0046] Dual outputs can significantly reduce the mounting weight and extension length of multiple hydraulic pumps connected in series, reduce hydraulic pump vibration and noise, and simultaneously meet the requirement that the two hydraulic pumps rotate in opposite directions.

[0047] Example 2

[0048] This invention discloses a dual power take-off device with eight operating modes, as shown in Table 1. When sliding sleeves C1 and C2 are not in operation, the following are the operating modes: Figure 2 As shown.

[0049] Table 1

[0050] Work mode C1 Sliding Sleeve C2 Sliding Sleeve 0 null null 1 Left Left 2 right Left 3 Left right 4 right right 5 null right 6 null Left 7 right null 8 Left null

[0051] The first working mode, such as Figure 3 As shown, C1 sliding sleeve 8 is to the left, and C2 sliding sleeve is to the left.

[0052] Specifically: Motor 1 forces the first input shaft gear 26 to rotate via input shaft 26. During rotation, the first input shaft gear 26 meshes with the first gear 2 and the fourth gear 24. The first gear 2 meshes with the second gear 4. Power is transmitted via the second intermediate shaft 5 to the first sliding sleeve engagement gear 6, causing it to rotate and act on the C1 sliding sleeve spline 7. The power is further transmitted via the first output shaft 11, acting on the first output flange 12.

[0053] During rotation, the first input shaft gear 26 simultaneously meshes with the fourth gear 24. The fourth gear 24, through the transmission action of the intermediate shaft 23, drives the third sliding sleeve engagement gear 22 to rotate, thereby transmitting power to the C2 sliding sleeve spline 20. The power then acts on the second output flange 17 via the second output shaft 16.

[0054] Example 3

[0055] This invention provides a dual power take-off device, with a second operating mode, such as... Figure 4 As shown, C1 sliding sleeve 8 moves to the right, and C2 sliding sleeve moves to the left.

[0056] Specifically: Motor 1 forces the first input shaft gear 26 to rotate through the input shaft 26, and the first input shaft gear 26 meshes with the first gear 2 and the fourth gear 24 during the rotation process.

[0057] During the rotation of the first gear 2, the third gear 13 rotates in the same direction. During the rotation, the third gear 13 meshes with the constant gear 10 of the first output shaft, transmitting power to the C1 sliding sleeve spline 7, which then acts on the first output flange 12 via the first output shaft 11.

[0058] During rotation, the first input shaft gear 26 simultaneously meshes with the fourth gear 24. The fourth gear 24, through the transmission action of the intermediate shaft 23, drives the third sliding sleeve engagement gear 22 to rotate, thereby transmitting power to the C2 sliding sleeve spline 20. The power then acts on the second output flange 17 via the second output shaft 16.

[0059] Example 4

[0060] This invention provides a dual power take-off device, with a third operating mode, such as... Figure 5 As shown, C1 sliding sleeve 8 moves to the left, and C2 sliding sleeve moves to the right.

[0061] Specifically: Motor 1 forces the first input shaft gear 26 to rotate via input shaft 26, and the first input shaft gear 26 meshes with the first gear 2 during rotation. The first gear 2 meshes with the second gear 4. Power is transmitted to the first sliding sleeve engagement gear 6 via the second intermediate shaft 5, causing it to rotate and act on the C1 sliding sleeve spline 7. The power is further transmitted via the first output shaft 11, acting on the first output flange 12.

[0062] During rotation, the first input shaft gear 26 causes the third input shaft gear 15 to rotate in the same direction. During rotation, the third input shaft gear 15 meshes with the constant gear 18 of the second output shaft, transmitting power to the C2 sliding sleeve spline 20, which then acts on the second output flange 17 via the second output shaft 16.

[0063] Example 5

[0064] This invention provides a dual power take-off device, with a fourth operating mode, such as... Figure 6 As shown, C1 sliding sleeve 8 is to the right, and C2 sliding sleeve is to the right.

[0065] Specifically: Motor 1 forces the first input shaft gear 26 to rotate through the input shaft 26, and the first input shaft gear 26 meshes with the first gear 2 during the rotation.

[0066] During the rotation of the first gear 2, the third gear 13 rotates in the same direction. During the rotation, the third gear 13 meshes with the constant gear 10 of the first output shaft, transmitting power to the C1 sliding sleeve spline 7, which then acts on the first output flange 12 via the first output shaft 11.

[0067] During rotation, the first input shaft gear 26 causes the third input shaft gear 15 to rotate in the same direction. During rotation, the third input shaft gear 15 meshes with the constant gear 18 of the second output shaft, transmitting power to the C2 sliding sleeve spline 20, which then acts on the second output flange 17 via the second output shaft 16.

[0068] Example 6

[0069] This invention provides a dual power take-off device, with a fifth operating mode, such as... Figure 7 As shown, the C2 sliding sleeve is to the right.

[0070] Specifically: Motor 1 forces the third input shaft gear 15 to rotate through input shaft 26. During the rotation, the third input shaft gear 15 meshes with the second output shaft constant gear 18, transmitting power to the C2 sliding sleeve spline 20, which then acts on the second output flange 17 via the second output shaft 16.

[0071] Example 7

[0072] This invention provides a dual power take-off device, with a sixth operating mode, such as... Figure 8 As shown, the C2 sliding sleeve is to the left.

[0073] Specifically: Motor 1 forces the first input shaft gear 26 to rotate via input shaft 26. During rotation, the first input shaft gear 26 simultaneously meshes with the fourth gear 24. The fourth gear 24, through the transmission action of intermediate shaft 23, drives the third sliding sleeve engagement gear 22 to rotate, thereby transmitting power to the C2 sliding sleeve spline 20. The power then acts on the second output flange 17 via the second output shaft 16.

[0074] Example 8

[0075] This invention provides a dual power take-off device with a seventh operating mode, such as... Figure 9 As shown, the C1 sliding sleeve is to the right.

[0076] Specifically, motor 1 forces the first input shaft gear 26 to rotate via input shaft 26, and the first input shaft gear 26 meshes with the first gear 2 during rotation. During rotation, the first gear 2 causes the third gear 13 to rotate in the same direction. During rotation, the third gear 13 meshes with the constant gear 10 of the first output shaft, transmitting power to the C1 sliding sleeve spline 7, and then acting on the first output flange 12 via the first output shaft 11.

[0077] Example 9

[0078] This invention provides a dual power take-off device, with an eighth operating mode, such as... Figure 10 As shown, the C1 sliding sleeve is to the left.

[0079] Specifically, motor 1 forces the first input shaft gear 26 to rotate via input shaft 26. During rotation, the first input shaft gear 26 meshes with the first gear 2 and the fourth gear 24. The first gear 2 meshes with the second gear 4. Power is transmitted via the second intermediate shaft 5 to the first sliding sleeve engagement gear 6, causing it to rotate and act on the C1 sliding sleeve spline 7. The power is further transmitted via the first output shaft 11, acting on the first output flange 12.

[0080] Example 10

[0081] This invention discloses a control method for a dual power take-off device, comprising the following steps: a motor controller 27 is connected to the input terminal of a motor 1; a first output flange load request sensor and a second output flange load request sensor respectively input electrical signals to a vehicle controller via wires; the vehicle controller inputs electrical signals to the motor controller 27 via wires; and the motor controller 27 is connected to the motor 1 via a high-voltage copper wire, outputting high voltage and current to the motor 1. The first output flange load request sensor collects the load request signal of the first output flange 12, and the second output flange load request sensor collects the load request signal of the second output flange 17.

[0082] The load request signal of the first output flange 12 is acquired to obtain the first target speed M of the motor. N1 Collect the load request signal from the second output flange 17 to obtain the second target speed M of the motor. N2 ; Set the motor's first target speed M N1 With the second target speed M of the motor N2 The smaller value is selected as the target speed of the motor; the target speed of the motor is then input to the motor controller 27 to drive the motor 1.

[0083] First target rotational speed M N1 This includes the first target speed in first gear and the first target speed in second gear;

[0084] The first target speed is: PTO N1 ×i c11

[0085] The first target second gear speed is: PTO N1 ×i c12

[0086] Among them, PTO N1 i is the target value for the first output flange speed. c11 When C1 slide sleeve is in the first position, i represents the total speed ratio of the transmission path from the motor to the first output flange.c12 When the C1 sliding sleeve is in the second position, the total speed ratio of the transmission path from the motor to the first output flange;

[0087] The second target rotational speed M N1 This includes the first gear speed of the second target and the second gear speed of the second target;

[0088] The second target speed is: PTO N2 ×i c21

[0089] The first target second gear speed is: PTO N2 ×i c22

[0090] Among them, PTO N2 i is the target value for the second output flange speed. c21 When the C2 sliding sleeve is in the first position, i represents the total speed ratio of the transmission path from the motor to the second output flange. c22 This refers to the total speed ratio of the transmission path from the motor to the second output flange when the C2 sliding sleeve is in the second gear position.

[0091] In summary, after the input speed and torque of motor 1, it passes through two transmission paths. Each transmission path has a sliding sleeve that can switch the two speed ratios of the transmission path and can cut off the power in neutral. The two output shafts can rotate simultaneously in opposite directions; or only one can rotate while the other output shaft is disconnected from motor 1 and does not output power.

[0092] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

Claims

1. A dual power take-off device, characterized in that: Includes a motor (1), the output end of which is connected to an input shaft (26). The input shaft (26) is provided with a rigidly connected first input shaft gear (25), a second input shaft gear (14), and a third input shaft gear (15). The first input shaft gear (25) meshes with a first gear (2) and a fourth gear (24) on both sides respectively. The first gear (2) meshes with the second gear (4). The first output flange (12) is reduced by two stages of speed reduction through the first gear (2) and the second gear (4), and the second output flange (17) is reduced by one stage of speed reduction through the fourth gear (24). The first output flange (12) and the second output flange (17) rotate in opposite directions and are both used to connect to the hydraulic pump load. The input end of the motor (1) is connected to a motor controller (27). The first gear (2) is sleeved on one end of the first intermediate shaft (3), and the third gear (13) is installed on the other end of the first intermediate shaft (3). The first gear (2), the first intermediate shaft (3), and the third gear (13) are rigidly connected. The third gear (13), the second input shaft gear (14), and the first output shaft constant gear (10) mesh. The first output shaft constant gear (10) is rigidly connected to the second sliding sleeve engagement gear (9) and floats on the first output shaft (11). The second gear (4) is sleeved on one end of the second intermediate shaft (5), and the first sliding sleeve engagement gear (6) is installed on the other end of the second intermediate shaft (5). The second gear (4), the second intermediate shaft (5), and the first sliding sleeve engagement gear (6) are rigidly connected. The input end of the first output flange (12) is connected to the first output shaft (11) and is connected to the first output shaft (11) via the first output shaft (11). The sliding sleeve spline (7) is rigidly connected; the fourth gear (24) is sleeved on one end of the third intermediate shaft (23), and the third sliding sleeve engagement tooth (22) is installed on the other end of the third intermediate shaft (23). The fourth gear (24), the third intermediate shaft (23), and the third sliding sleeve engagement tooth (22) are rigidly connected. The input end of the second output flange (17) is connected to the second output shaft (16), and through the second output shaft (16) and... Sliding sleeve spline (20) rigid connection.

2. The dual power take-off device according to claim 1, characterized in that: The The sliding spline (7) is fitted with Sliding sleeve (8); The Sliding sleeve (8) is fitted on Axial movement is performed on the sliding sleeve spline (7).

3. The dual power take-off device according to claim 1, characterized in that: The The sliding spline (20) is fitted with Sliding sleeve (21); The Sliding sleeve (21) is fitted on Axial movement is performed on the sliding sleeve spline (20).

4. The dual power take-off device according to claim 1, characterized in that: The third input shaft gear (15) is rigidly connected to the second output shaft constant gear (18); The second output shaft constant gear (18) and the fourth sliding sleeve engagement gear (19) are rigidly connected and float on the second output shaft (16).

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