Power take-off transmission system and working machine

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a power take-off transmission system and operating machinery, which comprise a power mechanism and a transfer case arranged at the output end of the power mechanism, the transfer case comprises an input shaft, a first output shaft, a second output shaft, a third output shaft and a fourth output shaft, the two ends of at least one of the first output shaft, the second output shaft, the third output shaft and the fourth output shaft are connected with power take-off oil pumps. The multiple output shafts are arranged on the two sides of the input shaft, the output shafts can obtain power from the input shaft, the power take-off ports can be formed in the two ends of each output shaft according to needs to be connected with the power take-off oil pumps, therefore, the multiple power take-off ports can be formed in the two sides of the transfer case, the multiple power take-off oil pumps can be dispersed at the two ends of each output shaft, and then the double-side arrangement requirement is met; the length of a transmission path is shortened, the overall structure of the transmission system is more compact, the installation space is fully utilized, layout and connection are convenient, concentrated torque output of a single output shaft is avoided, and the service life of the transmission system is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to a power take-off transmission system and a working machine. Background Technology

[0002] As wind power equipment enters the era of large-scale operation, the main equipment for onshore wind power installation, such as ultra-large tonnage all-terrain cranes, also needs to meet the demand for large-scale operation. In order to meet the requirements of ultra-large thousand-ton cranes to "lift heavy loads, lift fast loads, and lift stably", the power of the upper vehicle's power take-off transmission system is increasing, and the number of hydraulic power take-off pumps is also increasing.

[0003] Currently, most super-large tonnage cranes solve the problem of increasing the number of hydraulic power take-off pumps by arranging multiple power take-off ports on the same side of the transfer case and arranging oil pumps in series at each power take-off port.

[0004] However, adopting the above arrangement will increase the length of the transmission path, resulting in an excessively large overall axial dimension of the transmission system, making the transmission system layout very difficult. At the same time, it will also cause the output torque to be concentrated, resulting in excessive load on the output shaft of a single power take-off port, which can easily lead to problems such as breakage and overheating. Utility Model Content

[0005] This utility model provides a power take-off transmission system and a working machine to solve or improve the problems in the related technology of the upper vehicle power take-off transmission system, such as excessively long transmission path, excessively large overall axial dimension of the transmission system, difficult layout, and concentrated output torque, which leads to excessive load on the output shaft of a single power take-off port, making it prone to breakage and overheating.

[0006] In a first aspect, this utility model provides a power take-off transmission system, including a power mechanism and a transfer case disposed at the output end of the power mechanism; the transfer case includes:

[0007] The input shaft is connected to the output end of the power mechanism.

[0008] The first output shaft and the second output shaft are respectively disposed on both sides of the input shaft, and the first output shaft and the second output shaft are respectively connected to the input shaft through a gear mechanism;

[0009] A third output shaft is disposed on the side of the first output shaft away from the input shaft, and the third output shaft is connected to the first output shaft via a gear mechanism.

[0010] A fourth output shaft is located on the side of the second output shaft away from the input shaft, and the fourth output shaft is connected to the second output shaft via a gear mechanism.

[0011] Among them, at least one of the first output shaft, the second output shaft, the third output shaft and the fourth output shaft is connected to a power take-off pump at both ends.

[0012] In one alternative embodiment, the gear mechanism includes a first gear, a second gear, a third gear, a fourth gear, and a fifth gear;

[0013] The input shaft is fitted with the first gear, the first output shaft is fitted with the second gear, and the second output shaft is fitted with the third gear, wherein the second gear and the third gear mesh with the first gear respectively;

[0014] The third output shaft is fitted with the fourth gear, which meshes with the second gear;

[0015] The fourth output shaft is fitted with the fifth gear, which meshes with the third gear.

[0016] In one optional embodiment, the first output shaft, the second output shaft, the third output shaft, and the fourth output shaft are all arranged in parallel, and the first output shaft and the third output shaft, as well as the second output shaft and the fourth output shaft, are arranged symmetrically about the input shaft.

[0017] In one optional embodiment, the transfer case further includes a transfer case housing, and both ends of the third output shaft extend outside the transfer case housing;

[0018] The power take-off oil pump includes a first main pump, a first main hoisting oil pump, and a rotary oil pump. The first main pump is connected to the end of the third output shaft away from the power mechanism. The first main hoisting oil pump and the rotary oil pump are connected in series to the end of the third output shaft near the power mechanism.

[0019] In one optional embodiment, both ends of the fourth output shaft extend outside the transfer case housing;

[0020] The power take-off oil pump also includes a second main pump, an auxiliary winch oil pump, and a second main winch oil pump. The second main pump is connected to the end of the fourth output shaft away from the power mechanism. The auxiliary winch oil pump and the second main winch oil pump are connected in series to the end of the fourth output shaft near the power mechanism.

[0021] In one alternative embodiment, the end of the first output shaft away from the power mechanism extends out of the transfer case housing, and the end of the second output shaft away from the power mechanism extends out of the transfer case housing;

[0022] The power take-off pump also includes a cylinder arm pin emergency pump and a pilot replenishing pump, one of which is connected to the extended end of the first output shaft and the other is connected to the extended end of the second output shaft.

[0023] In one alternative implementation, it further includes:

[0024] A clutch is located at the output end of the power mechanism and is connected to the input shaft.

[0025] In one alternative implementation, the power mechanism includes an engine or an electric motor.

[0026] Secondly, this utility model also provides a working machine, including the power take-off transmission system as described in any of the above claims.

[0027] In one alternative embodiment, the vehicle further includes a lower vehicle and an upper vehicle rotatably connected to the lower vehicle, wherein the power take-off transmission system is disposed on the upper vehicle.

[0028] The power take-off transmission system provided by this utility model arranges a first output shaft, a second output shaft, a third output shaft, and a fourth output shaft on both sides of the input shaft. Each output shaft can obtain power from the input shaft, and a power take-off port can be set at both ends of each output shaft to connect to a power take-off oil pump as needed. Thus, multiple power take-off ports can be formed on both sides of the transfer case, and multiple power take-off oil pumps can be distributed at both ends of each output shaft. This can meet the requirement of dual-sided arrangement of the transfer case, shorten the length of the transmission path at both ends of the output shaft, make the overall structure of the transmission system more compact, make full use of the installation space, facilitate layout and connection, and avoid concentrated torque output from a single output shaft, reasonably distribute the load, and extend the service life of the transmission system. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the power take-off transmission system according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the transmission structure of the power take-off transmission system according to an embodiment of the present utility model;

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Power mechanism; 2. Transfer case; 201. Input shaft; 202. First output shaft; 203. Second output shaft; 204. Third output shaft; 205. Fourth output shaft; 206. First gear; 207. Second gear; 208. Third gear; 209. Fourth gear; 210. Fifth gear; 211. Transfer case housing; 3. First main pump; 4. First main winch oil pump; 5. Rotary oil pump; 6. Second main pump; 7. Auxiliary winch oil pump; 8. Second main winch oil pump; 9. Cylinder arm pin emergency oil pump; 10. Pilot replenishing oil pump; 11. Clutch. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, "a plurality of" means two or more. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The following is combined Figures 1 to 2This describes the power take-off transmission system and working machinery according to embodiments of the present utility model.

[0039] According to embodiments of this utility model, in one aspect, a power take-off transmission system is provided, suitable for application in cranes, fire trucks, etc. Specifically, as... Figure 1 As shown, the power take-off transmission system includes a power mechanism 1 and a transfer case 2 located at the output end of the power mechanism 1. Figure 2 As shown, the transfer case 2 includes an input shaft 201, a first output shaft 202, a second output shaft 203, a third output shaft 204, and a fourth output shaft 205. The input shaft 201 is connected to the output end of the power mechanism 1. The first output shaft 202 and the second output shaft 203 are respectively located on opposite sides of the input shaft 201, and are connected to the input shaft 201 via gear mechanisms. The third output shaft 204 is located on the side of the first output shaft 202 away from the input shaft 201, and is connected to the first output shaft 202 via a gear mechanism. The fourth output shaft 205 is located on the side of the second output shaft 203 away from the input shaft 201, and is connected to the second output shaft 203 via a gear mechanism. At least one of the first output shaft 202, the second output shaft 203, the third output shaft 204, and the fourth output shaft 205 has a power take-off pump connected to both ends.

[0040] This configuration, with the first output shaft 202, second output shaft 203, third output shaft 204, and fourth output shaft 205 arranged on both sides of the input shaft 201, allows each output shaft to obtain power from the input shaft 201. Power take-off ports can be installed at both ends of each output shaft to connect to a power take-off pump, thus forming multiple power take-off ports on both sides of the transfer case 2. Multiple power take-off pumps can be distributed at both ends of each output shaft, fulfilling the requirement of a dual-sided arrangement of the transfer case 2. Compared to the traditional single-sided power take-off and pump series connection, this effectively shortens the transmission path length, making the overall transmission system structure more compact, reducing installation dimensions, fully utilizing installation space, meeting the arrangement requirements of an increased number of power take-off pumps, facilitating layout and connection, avoiding concentrated torque output from a single output shaft, rationally distributing the load, extending the service life of the transmission system, and improving overall machine performance and product competitiveness. It should be noted that the number of output shafts and power take-off ports can be determined according to actual design requirements.

[0041] In some embodiments of this utility model, such as Figure 2As shown, the gear mechanism includes a first gear 206, a second gear 207, a third gear 208, a fourth gear 209, and a fifth gear 210. The gears and the drive shaft can be connected by keys, such as flat keys or splines. Specifically, the first gear 206 is mounted on the input shaft 201, the second gear 207 is mounted on the first output shaft 202, and the third gear 208 is mounted on the second output shaft 203. The second gear 207 and the third gear 208 mesh with the first gear 206, respectively. The fourth gear 209 is mounted on the third output shaft 204 and meshes with the second gear 207. The fifth gear 210 is mounted on the fourth output shaft 205 and meshes with the third gear 208.

[0042] During operation, the input shaft 201 drives the first gear 206 to rotate, which in turn drives the second gear 207 and the third gear 208 to rotate simultaneously, along with the first output shaft 202 and the second output shaft 203. At this time, the first output shaft 202 and the second output shaft 203 can drive the load, i.e., the power take-off pump, to operate. The second gear 207 drives the fourth gear 209 and the third output shaft 204 to rotate, and the third gear 208 drives the fifth gear 210 and the fourth output shaft 205 to rotate. At this time, the third output shaft 204 and the fourth output shaft 205 can drive the load, i.e., the power take-off pump, to operate.

[0043] This configuration, through direct meshing of gears, achieves efficient power transmission, ensures a precise transmission ratio, high reliability, and a more compact overall structure, saving space. Furthermore, as an optional implementation, power can also be transmitted between the drive shafts via multi-stage intermediate gears, thereby improving the flexibility, smoothness, and reliability of the transmission, while adapting to different spatial layouts and operating conditions.

[0044] In some embodiments of this utility model, the first output shaft 202, the second output shaft 203, the third output shaft 204, and the fourth output shaft 205 are all arranged in parallel, and the first output shaft 202 and the third output shaft 204, as well as the second output shaft 203 and the fourth output shaft 205, are symmetrically arranged about the input shaft 201. This arrangement makes full use of space, resulting in a more regular transmission structure, facilitating design and manufacturing. The driving force of the input shaft 201 is evenly distributed to each output shaft, avoiding excessive force on one side, improving the smoothness of the transmission, and enhancing the system's performance and adaptability. It is an efficient and reliable transmission layout.

[0045] In some embodiments of this utility model, such as Figure 1As shown, the transfer case 2 also includes a transfer case housing 211, and both ends of the third output shaft 204 extend outside the transfer case housing 211. The power take-off pump includes a first main pump 3, a first main hoisting pump 4, and a rotary pump 5. The first main pump 3 is connected to the end of the third output shaft 204 away from the power mechanism 1, and the first main hoisting pump 4 and the rotary pump 5 are connected in series to the end of the third output shaft 204 near the power mechanism 1.

[0046] Specifically, the third output shaft 204 obtains power from the input shaft 201 to provide power input to the first main pump 3, the first main hoisting oil pump 4, and the rotary oil pump 5. Thus, the first main pump 3 is connected to the first main pump cylinder to drive the first main pump cylinder to perform luffing and telescopic movements. The first main hoisting oil pump 4 is connected to the first main hoisting cylinder to drive the first main hoisting cylinder to perform the main hoisting operation. The rotary oil pump 5 is connected to the rotary cylinder to drive the rotary cylinder to perform the upper vehicle slewing operation.

[0047] Furthermore, in some embodiments of this utility model, such as Figure 1 As shown, both ends of the fourth output shaft 205 extend outside the transfer case housing 211. The power take-off pump also includes a second main pump 6, an auxiliary winch pump 7, and a second main winch pump 8. The second main pump 6 is connected to the end of the fourth output shaft 205 away from the power mechanism 1, and the auxiliary winch pump 7 and the second main winch pump 8 are connected in series to the end of the fourth output shaft 205 near the power mechanism 1.

[0048] Specifically, the fourth output shaft 205 obtains power from the input shaft 201 to provide power input to the second main pump 6, the auxiliary winch pump 7, and the second main winch pump 8. Thus, the second main pump 6 is connected to the second main pump cylinder to drive its movement, performing super-lifting, rope-threading, and auxiliary actions. The auxiliary winch pump 7 is connected to the auxiliary winch cylinder to drive its movement, performing auxiliary winch actions. The second main winch pump 8 is connected to the second main winch cylinder to drive its movement, performing main winch actions.

[0049] This configuration makes full use of the installation space on the power mechanism side, rationally arranges each power take-off pump, saves space, and facilitates layout and installation. Furthermore, the combined use of various hydraulic power take-off pumps can meet the crane's operating needs under different conditions, enabling various functional actions of the entire machine and improving the crane's lifting performance.

[0050] In some embodiments of this utility model, such as Figure 1As shown, the end of the first output shaft 202 away from the power mechanism 1 extends out of the transfer case housing 211, and the end of the second output shaft 203 away from the power mechanism 1 extends out of the transfer case housing 211. The power take-off pump also includes a cylinder arm pin emergency pump 9 and a pilot replenishment pump 10, one of which is connected to the extended end of the first output shaft 202, and the other is connected to the extended end of the second output shaft 203. For example, the cylinder arm pin emergency pump 9 is connected to the extended end of the first output shaft 202, and the pilot replenishment pump 10 is connected to the extended end of the second output shaft 203.

[0051] This configuration makes full use of the space available in the transfer case 2 and provides hydraulic fluid to the pilot control port that controls the hydraulic system valve group via the pilot replenishment pump 10, ensuring reliable operation of the hydraulic valve group. It also provides hydraulic fluid to the cylinder arm pin emergency system via the cylinder arm pin emergency pump 9 to ensure reliable operation of the pin in emergency situations, avoiding equipment damage or personal injury caused by malfunctions, and improving the stability and safety of the system.

[0052] In some embodiments of this utility model, such as Figure 2 As shown, the power take-off transmission system also includes a clutch 11, such as a normally closed hydraulic clutch. The clutch 11 is located at the output end of the power mechanism 1 and is connected to the input shaft 201. This configuration allows the system to flexibly control power transmission by connecting or disconnecting the power transmission between the power mechanism 1 and the input shaft 201 when needed, optimizing system performance, improving system controllability and safety, adapting to various operating conditions, and simplifying system operation.

[0053] In some embodiments of this utility model, the power mechanism 1 includes an engine or an electric motor, thus serving as the power source of the system. Taking an engine as an example, the output shaft of the engine is connected to the clutch 11 via a flexible coupling, and the input shaft 201 of the transfer case 2 extends into the clutch 11, thereby ultimately transmitting the engine's power to various working loads to realize various functional actions of the entire machine. It should be noted that an engine with appropriate power can be selected according to the overall performance requirements of the machine to meet the usage requirements of the crane's maximum lifting load, hoisting speed, telescopic boom time, etc. The transfer case 2 is designed according to the engine's input power and torque to meet the requirements of high speed and heavy load transmission. Power take-off ports and power take-off oil pumps are reasonably arranged on both sides of the transfer case housing 211. The power take-off oil pumps are configured according to the functional requirements of the entire crane, and complex functional actions of the entire vehicle are realized through the arrangement and combination of various power take-off oil pumps.

[0054] According to an embodiment of this utility model, another aspect provides a working machine, including the power take-off transmission system described in the above embodiments. Optionally, the working machine is a crane. Furthermore, as one implementation, the working machine also includes a lower carriage and an upper carriage rotatably connected to the lower carriage. Specifically, the turntable of the upper carriage is rotatably connected to the lower carriage via a slewing bearing. The power take-off transmission system is mounted on the upper carriage. Using this power take-off transmission system, power take-off ports can be arranged bidirectionally, ensuring the installation of more oil pumps without increasing the overall system installation size, thus facilitating layout. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effects of the power take-off transmission system described above, and therefore will not be repeated here.

[0055] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A power take-off transmission system characterized by, The power mechanism (1) and the transfer case (2) arranged at the output end of the power mechanism (1) are included. The input shaft (201) is in driving connection with the output end of the power mechanism (1). The first output shaft (202) and the second output shaft (203) are arranged on both sides of the input shaft (201), and the first output shaft (202) and the second output shaft (203) are in driving connection with the input shaft (201) through gear mechanisms. The third output shaft (204) is arranged on the side of the first output shaft (202) away from the input shaft (201), and the third output shaft (204) is in driving connection with the first output shaft (202) through a gear mechanism. The fourth output shaft (205) is arranged on the side of the second output shaft (203) away from the input shaft (201), and the fourth output shaft (205) is in driving connection with the second output shaft (203) through a gear mechanism. At least one of the first output shaft (202), the second output shaft (203), the third output shaft (204), and the fourth output shaft (205) has a power take-off oil pump connected to both ends.

2. The power take-off system of claim 1, wherein, The gear mechanism includes a first gear (206), a second gear (207), a third gear (208), a fourth gear (209), and a fifth gear (210). The input shaft (201) is sleeved with the first gear (206), the first output shaft (202) is sleeved with the second gear (207), the second output shaft (203) is sleeved with the third gear (208), and the second gear (207) and the third gear (208) are in meshing connection with the first gear (206). The third output shaft (204) is sleeved with the fourth gear (209), and the fourth gear (209) is in meshing connection with the second gear (207). The fourth output shaft (205) is sleeved with the fifth gear (210), and the fifth gear (210) is in meshing connection with the third gear (208).

3. The power take-off system of claim 1, wherein, The first output shaft (202), the second output shaft (203), the third output shaft (204), and the fourth output shaft (205) are arranged in parallel, and the first output shaft (202) and the third output shaft (204), and the second output shaft (203) and the fourth output shaft (205) are symmetrically arranged about the input shaft (201).

4. The power take-off system of any one of claims 1 to 3, characterized in that, The transfer case (2) further includes a transfer case housing (211), and both ends of the third output shaft (204) extend out of the transfer case housing (211). The power take-off oil pump includes a first main pump (3), a first main hoist oil pump (4), and a rotary oil pump (5), the first main pump (3) is connected to one end of the third output shaft (204) away from the power mechanism (1), and the first main hoist oil pump (4) and the rotary oil pump (5) are connected in series to one end of the third output shaft (204) close to the power mechanism (1).

5. The power take-off system of claim 4, wherein, Both ends of the fourth output shaft (205) extend out of the transfer case housing (211); The power take-off oil pump further comprises a second main pump (6), a secondary winch oil pump (7) and a second main winch oil pump (8), the second main pump (6) is connected to the end of the fourth output shaft (205) away from the power mechanism (1), and the secondary winch oil pump (7) and the second main winch oil pump (8) are connected in series to the end of the fourth output shaft (205) close to the power mechanism (1).

6. The power take-off system of claim 4, wherein, The end of the first output shaft (202) away from the power mechanism (1) extends out of the transfer case housing (211), and the end of the second output shaft (203) away from the power mechanism (1) extends out of the transfer case housing (211); The power take-off oil pump further comprises a cylinder arm pin emergency oil pump (9) and a pilot oil supplement oil pump (10), one of the cylinder arm pin emergency oil pump (9) and the pilot oil supplement oil pump (10) is connected to the extended end of the first output shaft (202), and the other is connected to the extended end of the second output shaft (203).

7. The power take-off system of any one of claims 1 to 3, wherein, Further comprising: A clutch (11) is arranged at the output end of the power mechanism (1), and the clutch (11) is connected to the input shaft (201).

8. The power take-off system of any one of claims 1 to 3, wherein, The power mechanism (1) comprises an engine or a motor.

9. A work machine characterized by, The power take-off transmission system comprises any one of claims 1 to 8.

10. A work machine according to claim 9, characterised in that Further comprising a lower vehicle and an upper vehicle rotatably connected to the lower vehicle, wherein the power take-off transmission system is arranged on the upper vehicle. Further comprising:

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