Semi-direct drive cutting section drive system

Abstract

The utility model relates to a kind of semi-direct drive cutting unit driving system, it is related to engineering machinery technical field, it includes support and gear box part assembly.Gear box part assembly includes motor assembly and two gear box assemblies;Motor assembly has two output parts arranged in the extension direction of preset axis and can rotate around preset axis, and motor assembly is installed in support;Two gear box assemblies are connected with support and distributed in the extension direction of motor assembly on both sides of preset axis;The input end of two gear box assemblies is respectively connected with two output parts transmission, and the output end of two gear box assemblies is rotatably connected with support around preset axis or with the axis parallel with preset axis.It is simple in structure, small in size, light in weight, can improve power density high, improve transmission reliability, reduce failure rate.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and more specifically, to a semi-direct drive cutting section drive system. Background Technology

[0002] In the field of construction machinery, especially in the field of integrated tunneling and anchoring machines, the gearbox of the cutting unit of traditional integrated tunneling and anchoring machines uses a separate motor drive and a separate gearbox for deceleration and torque increase. The two have independent transmission routes, which are complex in structure and have a low power density ratio. At the same time, the complex transmission system leads to a high overall failure rate of the gearbox, low operational stability and low reliability. Summary of the Invention

[0003] The objectives of this invention include, for example, providing a semi-direct drive cutting section drive system that has a simple structure, small size, light weight, high power density, improved transmission reliability, and reduced failure rate.

[0004] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a semi-direct drive cutting section drive system, comprising: Bracket and gearbox assembly; The gearbox assembly includes a motor assembly and two gearbox assemblies; the motor assembly has two output sections arranged in the extension direction of a preset axis and capable of rotating about the preset axis, and the motor assembly is mounted on the bracket; the two gearbox assemblies are both connected to the bracket and distributed on both sides of the motor assembly in the extension direction of the preset axis; the input ends of the two gearbox assemblies are respectively connected to the two output sections, and the output ends of the two gearbox assemblies are rotatably connected to the bracket about the preset axis or an axis parallel to the preset axis.

[0005] In an optional embodiment, the motor assembly includes a motor housing, a stator assembly, and a rotor assembly. The motor housing is fixedly connected to the bracket, the stator assembly is fixedly connected to the motor housing, and the rotor assembly is rotatably connected to the motor housing and located within the area enclosed by the stator assembly. The rotor assembly has two output sections at both ends.

[0006] In an optional embodiment, the motor housing includes a main housing, a first bearing sleeve, a second bearing sleeve, a first pressure plate, a second pressure plate, a first bearing, and a second bearing. The main housing has two openings arranged along the extension direction of the preset axis. The first bearing sleeve and the second bearing sleeve are both connected to the main housing and respectively close the two openings. The first pressure plate is connected to the first bearing sleeve, and the first pressure plate and the first bearing sleeve cooperate to clamp and fix the first bearing. The second pressure plate is connected to the second bearing sleeve, and the second pressure plate and the second bearing sleeve cooperate to clamp and fix the second bearing. The rotor assembly is rotatably connected to both the first bearing and the second bearing.

[0007] In an optional embodiment, the gearbox assembly includes a planetary transmission assembly and an output shaft. The input end of the planetary transmission assembly is connected to the corresponding output part, the output end of the planetary transmission assembly is drivenly connected to the output shaft, and the output shaft is rotatably connected to the bracket.

[0008] In an optional embodiment, the planetary transmission assembly includes a first-stage planetary transmission unit and a second-stage planetary transmission unit; The first-stage planetary transmission unit includes a first-stage sun gear, a first-stage ring gear, a first-stage planet carrier, and first-stage planet gears; the first-stage sun gear is connected to the corresponding output unit, the first-stage ring gear is fixedly connected to the motor assembly, the first-stage planet carrier is rotatably engaged with the first-stage ring gear, and the first-stage planet gears are rotatably mounted on the first-stage planet carrier; the first-stage planet gears simultaneously mesh with both the first-stage sun gear and the first-stage ring gear. The first-stage planetary carrier is connected to the second-stage planetary transmission unit.

[0009] In an optional embodiment, the first-stage planetary carrier is slidably engaged with the first-stage ring gear in the extension direction of the preset axis. One side of the first-stage planetary carrier can contact the first-stage sun gear, and the other side of the first-stage planetary carrier can contact the input end of the second-stage planetary transmission unit, thereby limiting the sliding range of the first-stage planetary carrier in the extension direction of the preset axis.

[0010] In an optional embodiment, the second-stage planetary transmission unit includes a second-stage sun gear, a second-stage ring gear, a second-stage planet carrier, and second-stage planet gears; the second-stage sun gear is fixedly connected to the first-stage planet carrier, the second-stage ring gear is rotatably engaged with the second-stage planet carrier, the second-stage planet carrier is fixedly connected to the first-stage ring gear, and the second-stage planet gears are rotatably mounted on the second-stage planet carrier; the second-stage planet gears simultaneously mesh with both the second-stage sun gear and the second-stage ring gear. The output shaft is fixedly connected to the second-stage gear ring.

[0011] In an optional embodiment, the gearbox assembly further includes a floating seal assembly mounted between the second-stage planetary carrier and the second-stage gear ring.

[0012] In an optional embodiment, the gearbox assembly further includes a cooling device, which includes a heat exchanger installed inside the gearbox assembly; both the bracket and the gearbox assembly are provided with heat exchange medium flow channels communicating with the heat exchanger.

[0013] In an optional embodiment, the semi-direct drive cutting section drive system further includes a dust removal device mounted on the bracket.

[0014] The beneficial effects of the embodiments of the present invention include, for example: The semi-direct drive cutting section drive system provided in this embodiment integrates two output sections into the motor assembly, and two gearbox assemblies are directly connected to the support and distributed on both sides. The input ends of the two gearbox assemblies are directly connected to their corresponding output sections. This structure eliminates the complex intermediate drive shaft, transmission bevel gears, and couplings found in traditional drive systems, achieving an integrated design of "motor and gearbox." While ensuring high power output, it effectively shortens the axial length of the cutting section, resulting in a more compact structure, higher power density, and more reliable transmission. It facilitates placement within limited downhole space, improving the overall machine's mobility and adaptability to complex geological conditions. The two gearbox assemblies are distributed on both sides of the motor assembly along a preset axis, and the motor assembly is connected to the gearboxes on both sides via the support. The two output sections are coaxially arranged, and the symmetrical layout design allows the axial forces of the entire drive system (especially the cutting section) to cancel each other out during operation, resulting in a more uniform load distribution. Compared to the traditional single-sided drive method, it significantly reduces the off-center load and stress concentration at the support and connection points, improving the structural rigidity and reliability of the entire machine and extending its service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the semi-direct drive cutting section drive system provided in this embodiment; Figure 2This is a cross-sectional view of the semi-direct drive cutting section drive system provided in this embodiment; Figure 3 for Figure 2 A magnified schematic diagram of a portion of the structure.

[0017] icon: 100-Bracket; 110-Main boom; 120-Intermediate boom; 130-End boom; 200-Gearbox assembly; 210-Motor assembly; 211-Motor housing; 2111-Main housing; 2112-First bearing sleeve; 2113-Second bearing sleeve; 2114-First pressure plate; 2115-Second pressure plate; 2116-First bearing; 2117-Second bearing; 212-Stator assembly; 213-Rotor assembly; 2131-Output section; 220-Gearbox assembly; 221-First stage planetary transmission unit; 2211- 2212-First stage sun gear; 2213-First stage planetary carrier; 2214-First stage planetary gear; 222-Second stage planetary transmission unit; 2221-Second stage sun gear; 2222-Second stage ring gear; 2223-Second stage planetary carrier; 2224-Second stage planetary gear; 223-Output shaft; 224-Floating seal assembly; 2241-First floating seat; 2242-Second floating seat; 2243-Floating seal body; 230-Cooling device; 300-Dust removal device; 400-High pressure oil pipe assembly. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not 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 invention.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0024] Please refer to Figure 1 and Figure 2 This embodiment provides a semi-direct drive cutting section drive system, which includes a bracket 100 and a gearbox assembly 200. The gearbox assembly 200 includes a motor assembly 210 and two gearbox assemblies 220; the motor assembly 210 has two output sections 2131 arranged in the extension direction of a preset axis and rotatable about the preset axis, and the motor assembly 210 is mounted on the bracket 100; the two gearbox assemblies 220 are both connected to the bracket 100 and distributed on both sides of the motor assembly 210 in the extension direction of the preset axis; the input ends of the two gearbox assemblies 220 are respectively connected to the two output sections 2131 for transmission, and the output ends of the two gearbox assemblies 220 are rotatably connected to the bracket 100 about the preset axis or an axis parallel to the preset axis.

[0025] As described above, the working principle of the semi-direct drive cutting section drive system provided in this embodiment is as follows: After the motor assembly 210 starts, it transmits power to two output units 2131. The two output units 2131 transmit torque to two gearbox assemblies 220 respectively. The two gearbox assemblies 220 adjust the torque so that it is output from the output end of the gearbox assembly 220. The output end can be connected to actuators such as the cutting drum, thereby driving the cutting drum to rotate and perform cutting operations.

[0026] It should be understood that by arranging the motor assembly 210 and the two gearbox assemblies 220 on the same axis, the rotation axis of the output part 2131 of the motor assembly 210 can be set parallel to the transmission axes of the input and output ends of the gearbox assembly 220. The motor assembly 210 and the gearbox assembly 220 can be directly connected together, eliminating the need for bevel gear sets and other structural components for adjusting the rotation axis direction of the output part 2131 of the motor assembly 210. This results in a more compact structure, fewer transmission chains, higher transmission efficiency, and lower failure rate. The overall structure is small in size, occupies little space, and has a high power density.

[0027] The following embodiments illustrate the details of the semi-direct drive cutting section drive system of this application by way of example.

[0028] Please refer to Figures 1-3 In this embodiment, optionally, the semi-direct drive cutting unit drive system includes a bracket 100, a gearbox assembly 200, and a dust removal device 300. The bracket 100 is used to connect with the telescopic boom of engineering machinery such as a tunneling and anchoring machine. The gearbox assembly 200 is mounted on the bracket 100 and is used to connect with the cutting drum, enabling the cutting drum to rotate. The dust removal device 300 is mounted on the bracket 100 and can reduce dust generated during the cutting operation.

[0029] Please refer to Figure 1 In this embodiment, optionally, the bracket 100 includes a main arm 110, an intermediate arm 120, and two end arms 130. The intermediate arm 120 and the two end arms 130 are all fixedly connected to the main arm 110, and are located on the same side of the main arm 110, with the intermediate arm 120 positioned between the two end arms 130. The intermediate arm 120 has a first mounting through hole, and each end arm 130 has a second mounting through hole. Both the first mounting through hole and the two second mounting through holes can be circular and are coaxially arranged. The axis of the first mounting through hole and the second mounting through hole is a preset axis.

[0030] It should be understood that the main boom 110, intermediate boom 120, and end booms 130 can all be made of metal, which has high structural strength, is not easily damaged or deformed, and has a long service life. The intermediate boom 120 can be fixedly connected to the main boom 110 by bolts or other structural components, and both end booms 130 can be welded to both ends of the main boom 110.

[0031] Please refer to Figure 2 and Figure 3 In this embodiment, optionally, the gearbox assembly 200 includes a motor assembly 210, two gearbox assemblies 220, and two cooling devices 230. The two gearbox assemblies 220 can have identical structures and are symmetrically distributed on both sides of the motor assembly 210, facilitating manufacturing and reducing manufacturing costs. The motor assembly 210 can simultaneously drive the two gearbox assemblies 220, converting electrical energy into mechanical energy and outputting torque through the two gearbox assemblies 220. The two gearbox assemblies 220 can be connected to two cutting drums respectively, ultimately driving the cutting drums to rotate for tunneling and other operations. The two cooling devices 230 cooperate with the two gearbox assemblies 220 respectively.

[0032] Because the motor assembly 210 and the two gearboxes are arranged side-by-side along the extension direction of the preset axis, the motor assembly 210 can be directly connected to the two gearbox assemblies 220. This results in a simple structure, short transmission chain, high transmission efficiency, light weight, and high power density. It is worth noting that in the traditional structure where the output shaft 223 of the motor assembly 210 is perpendicular to the output shaft 223 of the gearbox assembly 220, in order to transmit the torque from the output shaft 223 of the motor assembly 210 to the gearbox assembly 220, a structure such as meshing bevel gears is required. The output shaft 223 of the motor assembly 210 transmits the torque to the gearbox assembly 220 through a bevel gear set, resulting in a complex structure, long transmission chain, low transmission efficiency, heavy weight, and low power density.

[0033] Optionally, the motor assembly 210 can be configured as a permanent magnet motor, comprising a motor housing 211, a stator assembly 212, and a rotor assembly 213. The motor housing 211 passes through a first mounting through-hole and is fixedly connected to the bracket 100 via bolts or other structural components. The stator assembly 212 is fixedly connected to the motor housing 211, and the rotor assembly 213 is rotatably connected to the motor housing 211 and located within the area enclosed by the stator assembly 212. The rotor assembly 213 can rotate relative to the stator assembly 212, thereby outputting torque. When the motor assembly 210 is engaged with the bracket 100, the axis of the rotor assembly 213's rotation shaft coincides with a preset axis. Each end of the rotation shaft can be configured as an output section 2131, forming two output sections 2131 at both ends of the rotation shaft. The output sections 2131 can be configured as splined holes or splined shafts, etc. The two output sections 2131 are respectively connected to two gearbox assemblies 220 for transmission, thereby realizing torque transmission.

[0034] It should be understood that in other embodiments, the rotor assembly 213 may include two independent rotating shafts, each with an output section 2131 at its outer end. The two rotating shafts are connected to two gearbox assemblies 220 respectively to achieve torque output.

[0035] Optionally, the motor housing 211 includes a main housing 2111, a first bearing sleeve 2112, a second bearing sleeve 2113, a first pressure plate 2114, a second pressure plate 2115, a first bearing 2116, and a second bearing 2117. The main housing 2111 has two openings arranged along the extension direction of a preset axis. The first bearing sleeve 2112 and the second bearing sleeve 2113 are both connected to the main housing 2111 and respectively close the two openings. The first pressure plate 2114 is connected to the first bearing sleeve 2112, and the first pressure plate 2114 and the first bearing sleeve 2112 cooperate to clamp and fix the first bearing 2116. The second pressure plate 2115 is connected to the second bearing sleeve 2113, and the second pressure plate 2115 and the second bearing sleeve 2113 cooperate to clamp and fix the second bearing 2117. The first pressure plate 2114 and the second pressure plate 2115 are located between the first bearing sleeve 2112 and the second bearing sleeve 2113. The rotating shaft of the rotor assembly 213 is rotatably connected to both the first bearing 2116 and the second bearing 2117. Furthermore, neither end of the rotating shaft protrudes beyond the outer side of the first bearing sleeve 2112 or the second bearing sleeve 2113, and both output portions 2131 at both ends of the rotating shaft are configured as splined holes, which shortens the axial connection dimensions.

[0036] In this embodiment, optionally, the two gearbox assemblies 220 are configured to have the same structure. To avoid repetition and redundancy, this embodiment uses the structure of one gearbox assembly 220 and the cooperation structure between the gearbox assembly 220 and the motor assembly 210 as an example for illustration.

[0037] Optionally, the gearbox assembly 220 includes a planetary transmission assembly, an output shaft 223, and a floating seal assembly 224. The input end of the planetary transmission assembly is connected to the corresponding output section 2131, and the output end of the planetary transmission assembly is drively connected to the output shaft 223. The output shaft 223 passes through the second mounting through hole of the corresponding end arm 130 and can be rotatably connected to the bracket 100 via a bearing. In this way, the axis of the output shaft 223 coincides with a preset axis, that is, the axis of the output shaft 223 coincides with the rotation axis of the rotor assembly 213. The floating seal assembly 224 can improve the sealing performance of the planetary transmission assembly.

[0038] It is worth noting that in other embodiments, the axis of the output shaft 223 may be arranged parallel to the axis of the rotor assembly 213, rather than coinciding.

[0039] It should be understood that planetary transmission assemblies have diverse structures. This embodiment uses a two-stage planetary transmission assembly as an example for explanation. For instance, the planetary transmission assembly includes a first-stage planetary transmission unit 221 and a second-stage planetary transmission unit 222. The input end of the first-stage planetary transmission unit 221 is connected to the corresponding output part 2131, and the output end of the first-stage planetary transmission unit 221 is connected to the input end of the second-stage planetary transmission unit 222. The output end of the second-stage planetary transmission unit 222 is connected to the output shaft 223. The output shaft 223 can be a splined shaft and can be connected to a cutting gear to achieve torque output.

[0040] Specifically, the first-stage planetary transmission unit 221 includes a first-stage sun gear 2211, a first-stage ring gear 2212, a first-stage planet carrier 2213, and first-stage planet gears 2214. The first-stage sun gear 2211 passes through the spline hole of the corresponding output part 2131, and meshes with the output part 2131. The first-stage ring gear 2212 is fixedly connected to the first bearing sleeve 2112 of the motor assembly 210 by bolts. The first-stage planet carrier 2213 is located in the area enclosed by the first-stage ring gear 2212 and rotatably engages with the first-stage ring gear 2212. The first-stage planet gears 2214 are rotatably mounted on the first-stage planet carrier 2213. The number of first-stage planet gears 2214 is designed as needed and is not specifically limited in this embodiment. The first-stage planet gears 2214 mesh with both the first-stage sun gear 2211 and the first-stage ring gear 2212. Meanwhile, the second-stage planetary transmission unit 222 includes a second-stage sun gear 2221, a second-stage gear ring 2222, a second-stage planet carrier 2223, and a second-stage planet gear 2224. The second-stage sun gear 2221 is fixedly connected to the first-stage planet carrier 2213. The second-stage sun gear 2221 and the first-stage sun gear 2211 are distributed on both sides of the first-stage planet carrier 2213 in the extension direction of the preset axis. Furthermore, the first-stage planet carrier 2213 can slide relative to the first-stage gear ring 2212 in the extension direction of the preset axis. That is, the first-stage planet carrier 2213 is an axially floating design. During the axial floating process of the first-stage planet carrier 2213, when the first-stage planet carrier 2213 moves to the right, it can contact the first-stage sun gear 2211, and when the first-stage planet carrier 2213 moves to the left, it can contact the second-stage sun gear 2221. Thus, the floating range of the first-stage planet carrier 2213 is determined by the cooperation of the first-stage sun gear 2211 and the second-stage sun gear 2221. The second-stage ring gear 2222 is rotatably engaged with the second-stage planetary carrier 2223, which is fixedly connected to the first-stage ring gear 2212. The second-stage planetary gears 2224 are rotatably mounted on the second-stage planetary carrier 2223. The number of second-stage planetary gears 2224 is designed as needed and is not specifically limited in this embodiment. The second-stage planetary gears 2224 simultaneously mesh with the second-stage sun gear 2221 and the second-stage ring gear 2222. The second-stage ring gear 2222 is fixedly connected to the corresponding output shaft 223 via bolts or other structural components.

[0041] The power transmission method of the planetary transmission assembly provided in this embodiment is as follows: After the motor assembly 210 starts, the rotor assembly 213 drives the first-stage sun gear 2211 to rotate. Since the first-stage ring gear 2212 is fixedly connected to the first bearing sleeve 2112, it does not rotate. This causes the first-stage planetary gear 2214 to rotate on its own axis while simultaneously revolving around the axis of the first-stage ring gear 2212, thereby driving the first-stage planetary carrier 2213 to rotate. The first-stage planetary carrier 2213 drives the second-stage sun gear 2221 to rotate. Since the second-stage planetary carrier 2223 is fixed and does not rotate, the second-stage planetary gear 2224 rotates only relative to the second planetary carrier, driving the second-stage ring gear 2222 to rotate around a preset axis. The second-stage ring gear 2222 drives the output shaft 223 to rotate, outputting torque through the output shaft 223.

[0042] Optionally, the floating sealing assembly includes a first floating seat 2241, a second floating seat 2242, and a floating sealing body 2243. The first floating seat 2241 is fixedly connected to the second-stage planetary carrier 2223, and the second floating sealing seat is fixedly connected to the second-stage gear ring 2222. The floating sealing body 2243 simultaneously contacts both the first floating seat 2241 and the second floating seat 2242. The floating sealing body 2243 can slide relative to the first floating seat 2241 and the second floating seat 2242 in the extension direction of a preset axis, achieving dynamic sealing. In this case, external impurities are less likely to enter the interior through the annular gap between the second-stage planetary carrier 2223 and the second-stage gear ring 2222.

[0043] In this embodiment, optionally, the cooling device 230 includes a heat exchanger, which is installed inside the gearbox assembly 220. The number of cooling devices 230 is equal to the number of gearbox assemblies 220. The heat exchanger of each cooling device 230 is fixed on the first-stage planetary carrier 2213 of the corresponding gearbox assembly 220, located between the first-stage planetary carrier 2213 and the second-stage planetary carrier 2223, providing a wide coverage area and good cooling effect. Simultaneously, both the support 100 and the gearbox assembly 220 are provided with heat exchange medium flow channels communicating with the heat exchangers. Cooling medium flows within these channels, and the cooling medium, after passing through the heat exchangers, can remove heat from within the gearbox assembly 220.

[0044] It should be understood that the cooling medium can be coolant, etc.

[0045] In this embodiment, optionally, the dust removal device 300 includes two spray frames, each corresponding to one of the two gearbox assemblies 220. Both spray frames are mounted on the main boom 110. Spray interfaces communicating with the spray frames can be provided on the main boom 110.

[0046] Optionally, in other embodiments, a high-pressure oil pipe assembly 400 is provided inside the output shaft 223. The interface of the high-pressure oil pipe assembly 400 can be set on the main boom 110. The interface is connected to the high-pressure oil pipe assembly 400 through the internal pipeline of the gearbox assembly 220. The extension and retraction of the external roller can be realized by hydraulic adjustment.

[0047] It should be understood that each output shaft 223 has an integrated high-pressure oil pipe assembly 400, which can independently realize the extension and retraction of the external rollers at both ends.

[0048] The semi-direct drive cutting unit drive system provided in this embodiment arranges the motor assembly 210 and two gearbox assemblies 220 in a straight line, resulting in a simple and compact transmission structure, low failure rate, small footprint, and high power density. The two gearbox assemblies 220 are distributed on both sides of the motor assembly 210, with a symmetrical layout and modular design, facilitating disassembly and maintenance, and resulting in low design and operating costs.

[0049] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A semi-direct drive cutting assembly drive system, characterized by, include: Bracket (100) and gearbox assembly (200); The gearbox assembly (200) includes a motor assembly (210) and two gearbox assemblies (220); the motor assembly (210) has two output sections (2131) arranged in the extension direction of a preset axis and rotatable about the preset axis, and the motor assembly (210) is mounted on the bracket (100); the two gearbox assemblies (220) are both connected to the bracket (100) and distributed on both sides of the motor assembly (210) in the extension direction of the preset axis; the input ends of the two gearbox assemblies (220) are respectively connected to the two output sections (2131) for transmission, and the output ends of the two gearbox assemblies (220) are rotatably connected to the bracket (100) about the preset axis or an axis parallel to the preset axis.

2. The semi-direct drive cutting section drive system according to claim 1, characterized in that: The motor assembly (210) includes a motor housing (211), a stator assembly (212), and a rotor assembly (213). The motor housing (211) is fixedly connected to the bracket (100), the stator assembly (212) is fixedly connected to the motor housing (211), and the rotor assembly (213) is rotatably connected to the motor housing (211) and located within the area enclosed by the stator assembly (212). The rotor assembly (213) has two output sections (2131) at both ends.

3. The semi-direct drive cutting section drive system according to claim 2, characterized in that: The motor housing (211) includes a main housing (2111), a first bearing sleeve (2112), a second bearing sleeve (2113), a first pressure plate (2114), a second pressure plate (2115), a first bearing (2116), and a second bearing (2117). The main housing (2111) has two openings, which are arranged in the extension direction of the preset axis. The first bearing sleeve (2112) and the second bearing sleeve (2113) are both connected to the main housing (2111) and respectively close the two openings. The pressure plate (2114) is connected to the first bearing sleeve (2112), and the first pressure plate (2114) and the first bearing sleeve (2112) cooperate to clamp and fix the first bearing (2116); the second pressure plate (2115) is connected to the second bearing sleeve (2113), and the second pressure plate (2115) and the second bearing sleeve (2113) cooperate to clamp and fix the second bearing (2117); the rotor assembly (213) is rotatably connected to both the first bearing (2116) and the second bearing (2117).

4. The semi-direct drive cutting section drive system according to claim 1, characterized in that: The gearbox assembly (220) includes a planetary transmission assembly and an output shaft (223). The input end of the planetary transmission assembly is connected to the corresponding output part (2131), and the output end of the planetary transmission assembly is connected to the output shaft (223). The output shaft (223) is rotatably connected to the bracket (100).

5. The semi-direct drive cutting section drive system according to claim 4, characterized in that: The planetary transmission assembly includes a first-stage planetary transmission unit (221) and a second-stage planetary transmission unit (222). The first-stage planetary transmission unit (221) includes a first-stage sun gear (2211), a first-stage ring gear (2212), a first-stage planet carrier (2213), and a first-stage planetary gear (2214). The first-stage sun gear (2211) is connected to the corresponding output unit (2131), the first-stage ring gear (2212) is fixedly connected to the motor assembly (210), the first-stage planet carrier (2213) is rotatably engaged with the first-stage ring gear (2212), and the first-stage planetary gear (2214) is rotatably mounted on the first-stage planet carrier (2213). The first-stage planetary gear (2214) simultaneously meshes with both the first-stage sun gear (2211) and the first-stage ring gear (2212). The first-stage planetary carrier (2213) is connected to the second-stage planetary transmission unit (222) for transmission.

6. The semi-direct drive cutting section drive system according to claim 5, characterized in that: The first-stage planetary carrier (2213) is slidably engaged with the first-stage gear ring (2212) in the extension direction of the preset axis. One side of the first-stage planetary carrier (2213) can contact the first-stage sun gear (2211), and the other side of the first-stage planetary carrier (2213) can contact the input end of the second-stage planetary transmission unit (222) to limit the sliding range of the first-stage planetary carrier (2213) in the extension direction of the preset axis.

7. The semi-direct drive cutting section drive system according to claim 5, characterized in that: The second-stage planetary transmission unit (222) includes a second-stage sun gear (2221), a second-stage ring gear (2222), a second-stage planet carrier (2223), and a second-stage planet gear (2224). The second-stage sun gear (2221) is fixedly connected to the first-stage planet carrier (2213), the second-stage ring gear (2222) is rotatably engaged with the second-stage planet carrier (2223), the second-stage planet carrier (2223) is fixedly connected to the first-stage ring gear (2212), and the second-stage planet gear (2224) is rotatably mounted on the second-stage planet carrier (2223). The second-stage planet gear (2224) simultaneously meshes with both the second-stage sun gear (2221) and the second-stage ring gear (2222). The output shaft (223) is fixedly connected to the second-stage gear ring (2222).

8. The semi-direct drive cutting section drive system according to claim 7, characterized in that: The gearbox assembly (220) also includes a floating seal assembly (224) installed between the second-stage planetary carrier (2223) and the second-stage gear ring (2222).

9. The semi-direct drive cutting section drive system according to any one of claims 1-8, characterized in that: The gearbox assembly (200) also includes a cooling device (230), which includes a heat exchanger installed inside the gearbox assembly (220). Both the bracket (100) and the gearbox assembly (220) are provided with heat exchange medium flow channels communicating with the heat exchanger.

10. The semi-direct drive cutting section drive system according to any one of claims 1-8, characterized in that: The semi-direct drive cutting section drive system also includes a dust removal device (300), which is mounted on the bracket (100).

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