Heavy-load steering unit

By designing heavy -duty steering units, using the combination of rotating drive modules and linear drive modules to realize the steering and linear operation of the goods in any direction, solving the problem of only unilateral steering equipment in the existing technology, improvement, improve The efficiency of the logistics sorting system and the safety of goods.

CN119370578AInactive Publication Date: 2025-01-28YANTAI RUISHI AUTOMATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411528797.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-30
Publication Date
2025-01-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing steering equipment can only achieve one direction, cannot meet the needs of multi-direction steering, and is prone to damage to goods.

Method used

A heavy -duty steering unit is designed, including the base, the rotation drive module, and the linear drive module. The rotating drive module can drive the linear drive module to rotate and stop at any angle to achieve the guidance of the goods in any direction.

Benefits of technology

The steering and straight operation of the goods in any direction are realized, avoiding damage to the goods, and solving the problem that the steering equipment in the existing technology can only achieve unilateral steering.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a heavy-load steering unit, relates to the technical field of logistics, and solves the technical problem that steering equipment in the prior art can only realize steering in one direction. The device comprises a base, a rotary driving module and a linear driving module, the rotary driving module is installed in the base, the linear driving module is located above the base, and the linear driving module is connected with the rotary driving module; the rotary driving module can drive the linear driving module to rotate, and the linear driving module can drive goods on the linear driving module to move linearly.
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Description

Technical Field

[0001] The invention relates to the technical field of logistics, and in particular to a heavy-load steering unit. Background Art

[0002] With the development of electronic information technology, people's lives are becoming more and more convenient. Nowadays, people can buy goods from all over the country without leaving home, which has prompted the rapid development of the logistics industry. These goods are packaged into parcels and then transported; the rapid development of e-commerce has put higher and higher requirements on the logistics industry that serves it. In addition to requiring logistics companies to have strong transportation capabilities, sorting and scheduling are also a key link in improving service efficiency. Therefore, many existing logistics companies regard sorting and scheduling capabilities as the core.

[0003] In the sorting and scheduling process, the steering device is a key component to achieve efficient sorting. The quality of its performance directly affects the efficiency and quality of the entire sorting system. At present, the existing steering equipment includes a telescopic arm and a rotating platform. When the goods enter the rotating platform from one conveyor belt, the telescopic arm will push the goods on the rotating platform to another conveyor belt. The steering device can only achieve steering in one direction, that is, it can only transfer goods from one conveyor belt to another, and pushing through the telescopic arm is also prone to damage the goods. Summary of the invention

[0004] The purpose of the present invention is to provide a heavy-duty steering unit to solve the technical problem that the steering device in the prior art can only achieve steering in one direction. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A heavy-duty steering unit provided by the present invention comprises a base, a rotary drive module and a linear drive module, wherein the rotary drive module is installed in the base, the linear drive module is located above the base and the linear drive module is connected to the rotary drive module;

[0007] The rotary drive module can drive the linear drive module to rotate and the linear drive module can drive the goods on the linear drive module to run in a straight line.

[0008] Optionally, the rotation drive module includes a support frame, a fixed disk, a rotating disk, a first driver, a transmission assembly and a connecting assembly, the fixed disk is connected above the support frame, the first driver is connected to the side end of the support frame, the rotating disk is located above the fixed disk and the rotating disk is rotatably connected to the fixed disk via the connecting assembly, the first driver is connected to the rotating disk via the transmission assembly, and the linear drive module is installed above the rotating disk.

[0009] Optionally, the transmission assembly includes a gear and a chain, an annular groove is provided on the circumferential side wall of the rotating disk, the chain is installed in the annular groove and the chain is wrapped around the circumferential side wall of the rotating disk, the gear is connected to the output shaft of the first drive, and the gear is meshingly connected to the chain.

[0010] Optionally, the connecting assembly includes an intermediate positioning structure and a circumferential rolling structure, the central area of ​​the fixed disk and the central area of ​​the rotating disk are rotationally connected via the intermediate positioning structure, the circumferential rolling structure is connected to the circumferential area of ​​the fixed disk and there are multiple circumferential rolling structures, and the circumferential rolling structure is in contact with the rotating disk.

[0011] Optionally, the intermediate positioning structure includes a flange seat, a thrust bearing, a self-aligning ball bearing, a pad, a pressure plate and a cover plate, the lower end of the flange seat is connected to the central area of ​​the fixed disk, the thrust bearing and the self-aligning ball bearing are both sleeved on the flange seat and the self-aligning ball bearing is located above the thrust bearing, the self-aligning ball bearing passes through the center hole on the rotating disk and the outer wall of the self-aligning ball bearing cooperates with the inner wall of the pad, the pressure plate is located above the pad, the pad is located above the rotating disk, the pressure plate, the pad and the rotating disk are connected by screws, and the cover covers the middle area of ​​the pressure plate and is connected to the pressure plate.

[0012] Optionally, the circumferential rolling structure includes a support body and a sphere, the lower end of the support body is connected to the fixed disk, the upper end of the support body is provided with an inwardly recessed receiving groove, part of the sphere is located in the receiving groove and the sphere is movably connected to the receiving groove, and the lower end surface of the rotating disk is provided with an annular slide, part of the sphere is located in the annular slide and the sphere is in contact with the annular slide.

[0013] Optionally, the linear drive module includes an active roller group, a driven roller group, an auxiliary roller group, a second driver and a bracket, the bracket is installed on the rotary drive module, the active roller group, the driven roller group, the auxiliary roller group and the second driver are all installed on the bracket, the second driver is connected to one end of the active roller group, there are multiple driven roller groups, two adjacent driven roller groups are connected by a transmission chain, the active roller group is connected to the adjacent driven roller group by a transmission chain, there are two auxiliary roller groups, and the two auxiliary roller groups are respectively located at both ends of the bracket.

[0014] Optionally, the active roller group and the driven roller group both include a first roller shaft, a first bearing seat, a second bearing seat and a transmission gear, the first bearing seat and the second bearing seat are respectively connected to two ends of the bracket, one end of the first roller shaft passes through the first bearing seat and one end of the first roller shaft is rotatably connected to the first bearing seat, the other end of the first roller shaft passes through the second bearing seat and is connected to the two transmission gears, and the other end of the first roller shaft is rotatably connected to the second bearing seat.

[0015] Optionally, the auxiliary roller group includes a second roller shaft, a third bearing seat and a fourth bearing seat, the third bearing seat and the fourth bearing seat are respectively connected to two ends of the bracket, and the two ends of the second roller shaft are respectively rotatably connected to the third bearing seat and the fourth bearing seat;

[0016] The length of the second roller is smaller than that of the first roller, and the second roller is arranged parallel to the first roller.

[0017] Optionally, the base includes a first outer cover, a fixed frame and a foot cup, the first outer cover surrounds the circumferential side wall of the fixed frame, the fixed frame is connected to the rotation drive module, and the foot cup is connected to the bottom of the fixed frame.

[0018] The present invention provides a heavy-load steering unit, in which a rotary drive module can drive a linear drive module to rotate and can stop at any angle, so that goods on the linear drive module can enter or leave from any direction, and guided steering in any direction can be achieved. The linear drive module can drive the goods to run in a straight line by its own movement, so as not to damage the goods, thereby solving the technical problem in the prior art that the steering device can only achieve steering in one direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a structural schematic diagram of a heavy-duty steering unit provided by an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a heavy-duty steering unit provided by an embodiment of the present invention without a first outer cover;

[0022] Figure 3 It is a structural schematic diagram of a heavy-duty steering unit provided by an embodiment of the present invention without a first outer cover and a second outer cover;

[0023] Figure 4 It is a structural schematic diagram of the connection between a rotation drive module and a fixed frame of a heavy-duty steering unit provided by an embodiment of the present invention;

[0024] Figure 5 It is a structural schematic diagram showing another angle of connection between a rotation drive module and a fixed frame of a heavy-duty steering unit provided by an embodiment of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a rotary drive module of a heavy-duty steering unit provided by an embodiment of the present invention;

[0026] Figure 7 It is a structural schematic diagram of a rotation drive module of a heavy-duty steering unit provided by an embodiment of the present invention without a fixed disk;

[0027] Figure 8 It is a structural schematic diagram of a rotating disk of a heavy-duty steering unit provided by an embodiment of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of a fixed plate of a heavy-duty steering unit provided by an embodiment of the present invention;

[0029] Fig.10 It is a structural schematic diagram of an intermediate positioning structure of a heavy-duty steering unit provided by an embodiment of the present invention;

[0030] Fig.11 It is a structural schematic diagram of a linear drive module of a heavy-duty steering unit provided in an embodiment of the present invention.

[0031] In the figure, 1 is a base; 11 is a first outer cover; 12 is a fixed frame; 13 is a foot cup;

[0032] 2. Rotary drive module; 21. Support frame; 22. Fixed disk; 23. Rotating disk; 231. Annular groove; 232. Annular slideway; 24. First driver; 25. Transmission assembly; 251. Gear; 252. Chain; 26. Intermediate positioning structure; 261. Flange seat; 262. Thrust bearing; 263. Self-aligning ball bearing; 264. Backing plate; 265. Pressing plate; 266. Cover plate; 27. Circumferential rolling structure; 271. Support body; 272. Ball;

[0033] 3. Linear drive module; 31. Active roller group; 311. First roller shaft; 312. First bearing seat; 313. Second bearing seat; 314. Transmission gear; 32. Driven roller group; 33. Auxiliary roller group; 331. Second roller shaft; 332. Third bearing seat; 333. Fourth bearing seat; 34. Second driver; 35. Bracket; 36. Transmission chain; 37. Second outer cover. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The present invention provides a heavy-duty steering unit, comprising a base 1, a rotary drive module 2 and a linear drive module 3, wherein the rotary drive module 2 is installed in the base 1, the linear drive module 3 is located above the base 1 and the linear drive module 3 is connected to the rotary drive module 2;

[0038] The rotary drive module 2 can drive the linear drive module 3 to rotate, and the linear drive module 3 can drive the goods on the linear drive module 3 to run in a straight line. The heavy-duty steering unit provided by the present invention has the rotary drive module 2 that can drive the linear drive module 3 to rotate, and can stop at any angle, so that the goods on the linear drive module 3 can enter or leave from any direction, and can achieve guided steering in any direction. The linear drive module 3 can drive the goods to run in a straight line by its own movement, so as not to damage the goods, and solves the technical problem that the steering device in the prior art can only achieve steering in one direction.

[0039] As an optional implementation, the rotation drive module 2 includes a support frame 21, a fixed disk 22, a rotating disk 23, a first driver 24, a transmission assembly 25 and a connecting assembly. The fixed disk 22 is connected above the support frame 21, the first driver 24 is connected to the side end of the support frame 21, the rotating disk 23 is located above the fixed disk 22, and the rotating disk 23 is rotatably connected to the fixed disk 22 through the connecting assembly, the first driver 24 is connected to the rotating disk 23 through the transmission assembly 25, and the linear drive module 3 is installed above the rotating disk 23. The first driver 24 drives the rotating disk 23 to rotate through the transmission assembly 25, thereby driving the linear drive module 3 to rotate.

[0040] As an optional embodiment, the transmission assembly 25 includes a gear 251 and a chain 252. An annular groove 231 is provided on the circumferential side wall of the rotating disk 23. The chain 252 is installed in the annular groove 231 and the chain 252 surrounds the circumferential side wall of the rotating disk 23. The gear 251 is connected to the output shaft of the first driver 24. The gear 251 is located on one side of the rotating disk 23, and the gear 251 is meshed and connected with the chain 252. When the first driver 24 rotates, it drives the gear 251 to rotate, and through the meshing relationship between the gear 251 and the chain 252, the chain 252 is moved, and the movement of the chain 252 drives the rotating disk 23 to rotate.

[0041] As an optional embodiment, the connecting assembly includes an intermediate positioning structure 26 and a circumferential rolling structure 27. The central area of ​​the fixed disk 22 and the central area of ​​the rotating disk 23 are rotatably connected via the intermediate positioning structure 26. The intermediate positioning structure 26 is used to locate the positional relationship between the fixed disk 22 and the rotating disk 23 so that the rotating disk 23 can rotate relative to the fixed disk 22. The circumferential rolling structure 27 is connected to the circumferential area of ​​the fixed disk 22 and there are multiple circumferential rolling structures 27. The circumferential rolling structure 27 is in contact with the rotating disk 23. The circumferential rolling structure 27 is used to ensure that the rotating disk 23 does not tilt during rotation and plays a supporting role.

[0042] As an optional implementation, the intermediate positioning structure 26 includes a flange seat 261, a thrust bearing 262, a self-aligning ball bearing 263, a pad 264, a pressure plate 265 and a cover plate 266. The lower end of the flange seat 261 is connected to the central area of ​​the fixed disk 22. The thrust bearing 262 and the self-aligning ball bearing 263 are both mounted on the flange seat 261 and the self-aligning ball bearing 263 is located above the thrust bearing 262. The self-aligning ball bearing 263 passes through the center hole on the rotating disk 23 and the outer wall of the self-aligning ball bearing 263 cooperates with the inner wall of the pad 264. The pressure plate 265 is located above the pad 264. The pad 264 is located above the rotating disk 23. The pressure plate 265, the pad 264 and the rotating disk 23 are connected by screws. The cover plate 266 covers the middle area of ​​the pressure plate 265 and is connected to the pressure plate 265. Through the design of the thrust bearing 262 and the self-aligning ball bearing 263 , the backing plate 264 can be rotated relative to the flange seat 261 , thereby enabling the rotating disk 23 to rotate relative to the fixed disk 22 .

[0043] As an optional embodiment, the circumferential rolling structure 27 includes a support body 271 and a ball 272. The lower end of the support body 271 is connected to the fixed disk 22. The upper end of the support body 271 is provided with an inwardly recessed receiving groove. Part of the ball 272 is located in the receiving groove and the ball 272 is movably connected to the receiving groove. The ball 272 can roll in the receiving groove. The lower end surface of the rotating disk 23 is provided with an annular slide 232. The annular slide 232 is used to limit the moving trajectory of the ball 272 and to prevent the rotating disk 23 from shifting during rotation. Part of the ball 272 is located in the annular slide 232 and the ball 272 is in contact with the annular slide 232 in order to reduce the friction between the ball 272 and the annular slide 232.

[0044] As an optional embodiment, the linear drive module 3 includes an active roller group 31, a driven roller group 32, an auxiliary roller group 33, a second driver 34 and a bracket 35. The bracket 35 is mounted on the rotary drive module 2. The active roller group 31, the driven roller group 32, the auxiliary roller group 33 and the second driver 34 are all mounted on the bracket 35. The second driver 34 is connected to one end of the active roller group 31. There are multiple driven roller groups 32. The active roller group 31, the driven roller group 32 and the auxiliary roller group 33 are arranged in parallel. The active roller group 31 is located between multiple driven roller groups 32. Two adjacent driven roller groups 32 are connected by a transmission chain 36. The active roller group 31 is connected to the adjacent driven roller group 32 by the transmission chain 36. There are two auxiliary roller groups 33, and the two auxiliary roller groups 33 are respectively located at both ends of the bracket 35. The linear drive module 3 also includes a second outer cover 37. There are two second outer covers 37, and the two second outer covers 37 are respectively covered on both sides of the bracket 35. When the second driver 34 is started, it will drive the active roller group 31 to rotate, and through the transmission chain 36, the driven roller group 32 adjacent to the active roller group 31 will rotate in the same way, and then through the next transmission chain 36, the next driven roller group 32 will rotate, so that all the driven roller groups 32 can operate synchronously, and the goods are located on the roller group, and the rotation of the roller group drives the goods to move.

[0045] As an optional implementation, the active roller group 31 and the driven roller group 32 both include a first roller shaft 311, a first bearing seat 312, a second bearing seat 313 and a transmission gear 314. The first bearing seat 312 and the second bearing seat 313 are respectively connected to the two ends of the bracket 35. One end of the first roller shaft 311 passes through the first bearing seat 312 and one end of the first roller shaft 311 is rotatably connected to the first bearing seat 312. The other end of the first roller shaft 311 passes through the second bearing seat 313 and is connected to two transmission gears 314. A transmission gear 314 on a first roller shaft 311 is connected to a transmission gear 314 on another adjacent first roller shaft 311 through a transmission chain 36. The other end of the first roller shaft 311 is rotatably connected to the second bearing seat 313.

[0046] As an optional embodiment, the auxiliary roller group 33 includes a second roller shaft 331, a third bearing seat 332 and a fourth bearing seat 333, the third bearing seat 332 and the fourth bearing seat 333 are respectively connected to the two ends of the bracket 35, and the two ends of the second roller shaft 331 are respectively rotatably connected to the third bearing seat 332 and the fourth bearing seat 333;

[0047] The length of the second roller 331 is smaller than that of the first roller 311, and the second roller 331 is arranged parallel to the first roller 311. The auxiliary roller set 33 serves as a receiving member.

[0048] As an optional embodiment, the base 1 includes a first outer cover 11, a fixed frame 12 and a foot cup 13, the first outer cover 11 surrounds the circumferential side wall of the fixed frame 12, the fixed frame 12 is connected to the rotation drive module 2, the fixed frame 12 is connected to the supporting frame 21, and the foot cup 13 is connected to the bottom of the fixed frame 12.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A heavy-duty steering unit, characterized in that: It comprises a base (1), a rotary drive module (2) and a linear drive module (3), wherein: The rotary drive module (2) is installed in the base (1), the linear drive module (3) is located above the base (1) and the linear drive module (3) is connected to the rotary drive module (2); The rotary drive module (2) can drive the linear drive module (3) to rotate, and the linear drive module (3) can drive the goods on the linear drive module (3) to move in a straight line.

2. A heavy-duty steering unit according to claim 1, characterized in that: The rotary drive module (2) comprises a support frame (21), a fixed disk (22), a rotating disk (23), a first driver (24), a transmission assembly (25) and a connecting assembly, wherein the fixed disk (22) is connected above the support frame (21), the first driver (24) is connected to a side end of the support frame (21), the rotating disk (23) is located above the fixed disk (22) and the rotating disk (23) is rotatably connected to the fixed disk (22) via the connecting assembly, the first driver (24) is connected to the rotating disk (23) via the transmission assembly (25), and the linear drive module (3) is installed above the rotating disk (23).

3. A heavy-duty steering unit according to claim 2, characterized in that: The transmission assembly (25) comprises a gear (251) and a chain (252); an annular groove (231) is provided on the circumferential side wall of the rotating disk (23); the chain (252) is installed in the annular groove (231) and surrounds the circumferential side wall of the rotating disk (23); the gear (251) is connected to the output shaft of the first driver (24); and the gear (251) is meshingly connected to the chain (252).

4. A heavy-duty steering unit according to claim 2, characterized in that: The connecting assembly comprises an intermediate positioning structure (26) and a circumferential rolling structure (27); the central area of ​​the fixed disk (22) and the central area of ​​the rotating disk (23) are rotationally connected via the intermediate positioning structure (26); the circumferential rolling structure (27) is connected to the circumferential area of ​​the fixed disk (22) and the number of the circumferential rolling structures (27) is multiple; and the circumferential rolling structure (27) is in contact with the rotating disk (23).

5. A heavy-duty steering unit according to claim 4, characterized in that: The intermediate positioning structure (26) comprises a flange seat (261), a thrust bearing (262), a self-aligning ball bearing (263), a pad (264), a pressure plate (265) and a cover plate (266); the lower end of the flange seat (261) is connected to the central area of ​​the fixed plate (22); the thrust bearing (262) and the self-aligning ball bearing (263) are both sleeved on the flange seat (261); the self-aligning ball bearing (263) is located above the thrust bearing (262); the self-aligning ball bearing (263) is located above the thrust bearing (262); and the self-aligning ball bearing (263) is located above the thrust bearing (262). 63) passes through the center hole on the rotating disk (23) and the outer wall of the self-aligning ball bearing (263) cooperates with the inner wall of the pad (264), the pressure plate (265) is located above the pad (264), and the pad (264) is located above the rotating disk (23), the pressure plate (265), the pad (264) and the rotating disk (23) are connected by screws, and the cover plate (266) covers the middle area of ​​the pressure plate (265) and is connected to the pressure plate (265).

6. A heavy-duty steering unit according to claim 4, characterized in that: The circumferential rolling structure (27) comprises a support body (271) and a ball (272); the lower end of the support body (271) is connected to the fixed disk (22); the upper end of the support body (271) is provided with an inwardly recessed receiving groove; part of the ball (272) is located in the receiving groove and the ball (272) is movably connected to the receiving groove; the lower end surface of the rotating disk (23) is provided with an annular slideway (232); part of the ball (272) is located in the annular slideway (232) and the ball (272) is in contact with the annular slideway (232).

7. A heavy-duty steering unit according to claim 1, characterized in that: The linear drive module (3) comprises an active roller group (31), a driven roller group (32), an auxiliary roller group (33), a second driver (34) and a bracket (35); the bracket (35) is mounted on the rotary drive module (2); the active roller group (31), the driven roller group (32), the auxiliary roller group (33) and the second driver (34) are all mounted on the bracket (35); the second driver (34) is connected to one end of the active roller group (31); there are multiple driven roller groups (32); two adjacent driven roller groups (32) are connected via a transmission chain (36); the active roller group (31) is connected to adjacent driven roller groups (32) via a transmission chain (36); there are two auxiliary roller groups (33); the two auxiliary roller groups (33) are respectively located at two ends of the bracket (35).

8. A heavy-duty steering unit according to claim 7, characterized in that: The active roller group (31) and the driven roller group (32) both include a first roller shaft (311), a first bearing seat (312), a second bearing seat (313) and a transmission gear (314); the first bearing seat (312) and the second bearing seat (313) are respectively connected to two ends of the bracket (35); one end of the first roller shaft (311) passes through the first bearing seat (312) and one end of the first roller shaft (311) is rotatably connected to the first bearing seat (312); the other end of the first roller shaft (311) passes through the second bearing seat (313) and is connected to two transmission gears (314); the other end of the first roller shaft (311) is rotatably connected to the second bearing seat (313).

9. A heavy-duty steering unit according to claim 8, characterized in that: The auxiliary roller group (33) comprises a second roller shaft (331), a third bearing seat (332) and a fourth bearing seat (333), wherein the third bearing seat (332) and the fourth bearing seat (333) are respectively connected to two ends of the bracket (35), and the two ends of the second roller shaft (331) are respectively rotatably connected to the third bearing seat (332) and the fourth bearing seat (333); The length of the second roller (331) is smaller than the length of the first roller (311), and the second roller (331) and the first roller (311) are arranged in parallel.

10. A heavy-duty steering unit according to claim 1, characterized in that: The base (1) comprises a first outer cover (11), a fixed frame (12) and a foot cup (13); the first outer cover (11) surrounds the circumferential side wall of the fixed frame (12); the fixed frame (12) is connected to the rotary drive module (2); and the foot cup (13) is connected to the bottom of the fixed frame (12).