Follow-up steering type center axle trailer with auxiliary supporting function

Abstract

The invention discloses an auxiliary supporting follow-up steering type center shaft trailer, and relates to the technical field of trailers. A driving mechanism is arranged in the middle of the bottom surface of the trailer bearing frame, and the driving mechanism comprises a driving top plate; a steering mechanism is arranged in the middle of the bottom face of the driving mechanism and comprises a steering sector plate, and a steering driving shaft is slidably arranged in the steering sector plate. Wherein supporting mechanisms are arranged on the front side and the rear side of the bottom face of the driving mechanism correspondingly, and each supporting mechanism comprises a supporting frame. According to the follow-up steering type center shaft trailer with the auxiliary supporting function, the driving mechanism below the trailer bearing frame is connected with the driving trailer body, so that the whole trailer has driving force, a steering positioning disc of the steering mechanism drives a driving top plate to rotate, and a supporting mechanism is linked to reduce side inclination during steering; meanwhile, the pressure water tank and the cooling spraying pipe are driven to dissipate heat for the damping plate spring, and the supporting effect is prevented from being reduced due to high temperature.

Description

Technical Field

[0001] The invention relates to the technical field of trailers, in particular to an auxiliary supported follow-up steering type mid-axle trailer. Background Art

[0002] A mid-axle trailer is also called a center-axle trailer. It is a type of full trailer. Because the axle is installed in the middle of the vehicle, it cannot maintain balance on its own. When it is not connected to other vehicles, it needs to rely on liftable outriggers to maintain stability. The mid-axle trailer moves and turns with the tractor during towing and loading. The invention with publication number CN112208659A discloses a skeleton-type transport semitrailer. A connecting part and a connecting mechanism are arranged on its supporting frame. The connecting part adopts a simple and reliable turntable structure to be fixed to the connecting flange of the tractor head. It is not only simple to disassemble and assemble, but also has good connection stability. At the same time, the connecting mechanism adopts a multi-directional distribution method to be connected with corresponding assembly holes on external platforms such as supporting or containing. It is not only convenient to disassemble and assemble, but also has reliable connection.

[0003] The invention with publication number CN104843098A discloses a semi-trailer with steering, wherein the front A-frame and the rear A-frame are both wedge-shaped, the top end of the front A-frame is connected with a retractable front telescopic arm, the top end of the rear A-frame is connected with a retractable rear telescopic arm, the front telescopic arm and the rear telescopic arm are hingedly connected, and the present invention adopts a mechanical structure to realize the steering of the semi-trailer, reduce tire wear, and reduce the minimum turning radius and channel width of the vehicle.

[0004] However, the above-disclosed trailer with steering function still has the following problems in actual use: although the trailer is assisted in steering by a rotatable driving wheel group, the installation of such a steering mechanism requires each set of driving wheels on the trailer to be driven separately, and the independent steering assembly is difficult to ensure linkage at different angles. At the same time, as a trailer for load transportation, it is prone to rollover and insufficient support during the steering process due to the small number of axles and the central position, making it difficult to ensure the stability of the mounting and the safety of transportation.

[0005] Therefore, we propose a kind of auxiliary support follow-up steering type center axle trailer, in order to solve the problems raised in the above-mentioned. Summary of the invention

[0006] The purpose of the present invention is to provide a follow-up steering type central axle trailer with auxiliary support, in order to solve the existing problem that the trailer is assisted in steering by a rotatable driving wheel group, but the installation of such a steering mechanism requires each set of driving wheels on the trailer to be driven separately, and the independent steering assembly is difficult to ensure the linkage at different angles. At the same time, as a trailer for load transportation, it is easy to have problems such as rollover and insufficient support during the steering process due to the small number of axles and the central position, and it is difficult to ensure the stability of the mounting and the safety of transportation.

[0007] To achieve the above object, the present invention provides the following technical solutions: an auxiliary supported follow-up steering type mid-axle trailer, comprising a trailer load frame, and a load-bearing bottom plate fixedly mounted on the top surface of the trailer load frame, and a telescopic support assembly is arranged below the right end of the trailer load frame; and further comprising: A driving mechanism is provided in the middle of the bottom surface of the trailer carrier frame, and the driving mechanism includes a driving top plate, and driving wheel sets are provided on the front and rear sides of the bottom of the driving top plate in a left-right symmetrical manner; A steering mechanism is provided in the middle of the bottom surface of the driving mechanism, and the steering mechanism includes a steering fan plate, and a steering drive shaft is slidably provided inside the steering fan plate; Among them, support mechanisms are arranged on both the front and rear sides of the bottom of the driving mechanism, and the support mechanisms include a support frame, and damping supports are slidably arranged on both the left and right sides of the bottom surface of the symmetrically arranged support frame.

[0008] Preferably, the driving mechanism includes a connecting support seat, and the connecting support seat is fixedly installed on the bottom surface of the driving top plate in a front-to-back symmetrical manner and at equal distances, and a shock-absorbing leaf spring is rotatably arranged on the upper part of the adjacent connecting support seat, and the lower part of the adjacent connecting support seat is hingedly connected to the inner end of the supporting connecting rod.

[0009] Preferably, the driving mechanism includes a driving bridge, and the driving bridge is fixedly installed on the middle part of the bottom surface of the front and rear shock-absorbing leaf springs by bolts, and the bottom of the driving bridge is hingedly connected to the inner end of the supporting connecting rod, and a transmission drum is fixedly installed in the middle part of the driving bridge, and a driving connecting rod is rotatably installed inside the transmission drum through a bearing.

[0010] Preferably, the driving mechanism includes a driving axle whose interior front and rear sides are both provided with a driving shaft rotatably via bearings, and the outer end of the driving shaft is fixedly connected to the driving wheel set by bolts, and the inner end of the driving shaft extends to the interior of the transmission drum and realizes transmission between the driving connecting rod.

[0011] Preferably, the steering fan plate included in the steering mechanism is fixedly installed in the middle part of the bottom surface of the driving top plate, and a steering positioning plate is fixedly provided on the bottom surface of the driving top plate, and the bottom end of the steering positioning plate and the steering drive shaft are meshed and connected with each other through a bevel gear group, and a positioning frame is installed on the outer wall of the steering drive shaft.

[0012] Preferably, the driving top plate included in the steering mechanism is rotatably arranged on the bottom surface of the trailer carrier frame through a steering positioning disk at an internal center position, and the steering fan plate included in the steering mechanism is used to support the steering drive shaft and the positioning frame, and the steering drive shaft rotates inside the steering fan plate and revolves around the steering positioning disk.

[0013] Preferably, the support mechanism includes a resistance flip rod, and the inner end of the resistance flip rod is hingedly connected to the front and rear sides of the external positioning frame of the steering drive shaft, and the outer end of the resistance flip rod slides through the interior of the support frame, and the outer end of the resistance flip rod is hingedly connected to a guide slider.

[0014] Preferably, the supporting mechanism includes a spiral rotating rod, and the left end spiral of the spiral rotating rod passes through the interior of the guide slider, and driving gears are fixedly provided on the left and right outer walls of the spiral rotating rod, and a driving tooth plate is meshed on the inner side of the driving gear, and the bottom end of the driving tooth plate is fixedly connected to the top surface of the damping support, and the damping support is used to support the shock-absorbing leaf springs correspondingly distributed below.

[0015] Preferably, the support mechanism includes a pressure water tank fixedly installed on the inner side of the support frame, and the left and right sides of the outside of the pressure water tank are connected to the upper end of the cooling spray pipe, and the lower end of the cooling spray pipe extends to the outside of the corresponding shock-absorbing leaf spring.

[0016] Preferably, the inner side of the damping support included in the support mechanism is fixedly connected to the pressure valve plate of the pressure water tank, and the damping support moves after being resisted by the deformation of the shock-absorbing leaf spring, and sprays the shock-absorbing leaf spring through the pressure water tank and the cooling spray pipe that is connected through it to achieve cooling and heat dissipation.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the auxiliary supported follow-up steering type central axle trailer is connected to the driving vehicle body through the driving mechanism under the trailer load frame, so that the entire trailer has driving force, and the steering positioning plate of the steering mechanism drives the driving top plate to rotate, and links the supporting mechanism to reduce the roll during steering, and at the same time drives the pressure water tank and the cooling spray pipe to dissipate heat for the shock-absorbing leaf spring, thereby avoiding the reduction of the supporting effect due to high temperature. The specific contents are as follows: 1. The driving connecting rod is connected to the driving part of the vehicle body. The rotating transmission drive shaft is meshed through the spline and differential installed inside the transmission drum, thereby driving the front and rear drive shafts and the drive wheel group to rotate, thereby providing driving force for the trailer frame, so as to reduce the traction burden of the vehicle body and improve the passing ability of the trailer frame under extreme terrain.

[0018] The driving top plate is connected to the shock-absorbing leaf spring through the connecting support seat on the bottom surface, and the bottom end of the adjacent connecting support seat is hinged to the supporting connecting rod, so that the driving wheel group can be supported by the shock-absorbing leaf spring and the supporting connecting rod, so as to achieve the effect of shock absorption and improving stability in pothole conditions.

[0019] 2. The steering system drives the steering drive shaft to rotate. During the rotation of the steering drive shaft, the steering positioning plate on the bottom of the driving top plate is driven to rotate through the bevel gear group. At the same time, the steering positioning plate drives the driving top plate to rotate under the trailer load frame, and the driving wheel group and its supporting components follow, so as to increase the steering angle and convenience of the mid-axle trailer.

[0020] 3. The steering drive shaft drives the positioning frame and the hinged resistance flip rod to flip, so that the guide slider drives the spirally connected spiral rotating rod to rotate, and then the driving gear fixedly installed on the outer wall of the spiral rotating rod engages to drive the toothed plate to slide downward, thereby driving the damping supporter fixedly connected at the bottom to descend, and then resists against the top of the corresponding shock-absorbing leaf spring, so as to support the excessive deformation of the shock-absorbing leaf spring during the steering roll process, thereby reducing the inclination of the trailer load frame during the steering process.

[0021] The positioning frame drives the resistance flip rod on the other side away from the supporting frame, so that the damping support on the other side moves upward and increases the distance with the corresponding shock-absorbing leaf spring, thereby adjusting the supporting performance of the shock-absorbing leaf spring on the other side during the steering process, so as to achieve a balanced support effect during tilting.

[0022] 4. During the steering process, the shock-absorbing leaf spring is deformed and moves against the damping support, and then the damping support contacts the pressure valve plate inside the pressure water tank to assist in squeezing the cooling water inside the pressure water tank through the through-connected cooling spray pipe to spray the shock-absorbing leaf spring for cooling, thereby preventing the shock-absorbing leaf spring from undergoing reciprocating deformation for a long time and reducing its supporting effect due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the installation structure of the traveling mechanism and the trailer carrier frame of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the traveling mechanism of the present invention; Figure 4 This is a schematic diagram of the installation structure of the driving connecting rod of the present invention; Figure 5 It is a schematic diagram of the installation structure of the shock-absorbing leaf spring and the supporting connecting rod of the present invention; Figure 6 This is a schematic diagram of the support frame installation structure of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the pressure water tank of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the transmission drum of the present invention; Fig. 9 This is a schematic diagram of the installation structure of the steering fan plate and the steering drive shaft of the present invention; Fig.10 It is a schematic diagram of the structure after the steering drive shaft of the present invention rotates; Fig.11 It is a schematic diagram of the structure of the damping support of the present invention; Fig.12 It is a schematic diagram of the installation structure of the pressure water tank of the present invention.

[0024] In the figure: 1. trailer load frame; 2. load-bearing bottom plate; 3. telescopic support assembly; 4. driving top plate; 5. driving wheel group; 6. steering fan plate; 7. steering drive shaft; 8. supporting frame; 9. damping support; 10. connecting support seat; 11. shock-absorbing leaf spring; 12. supporting connecting rod; 13. driving connecting bridge; 14. transmission drum; 15. driving connecting rod; 16. driving shaft; 17. steering positioning plate; 18. bevel gear group; 19. positioning frame; 20. resistance turning rod; 21. guide slider; 22. spiral rotating rod; 23. driving gear; 24. driving gear plate; 25. pressure water tank; 26. cooling spray pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 12 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problems existing in the use of the existing mid-axle trailer, this embodiment adopts the following technical scheme: an auxiliary supported follow-up steering mid-axle trailer, comprising a trailer carrier frame 1, and a bearing bottom plate 2 fixedly mounted on the top surface of the trailer carrier frame 1, and a telescopic support assembly 3 is arranged below the right end of the trailer carrier frame 1; a driving mechanism is arranged in the middle of the bottom surface of the trailer carrier frame 1, and the driving mechanism includes a driving top plate 4, and a driving wheel group 5 is arranged on the front and rear sides of the bottom of the driving top plate 4 in a left-right symmetrical manner.

[0027] The driving mechanism includes a connecting support seat 10, and the connecting support seat 10 is fixedly installed on the bottom surface of the driving top plate 4 in a front-to-back symmetrical manner at equal distances, and a shock-absorbing leaf spring 11 is rotatably arranged on the upper part of the adjacent connecting support seat 10, and the lower part of the adjacent connecting support seat 10 is hingedly connected to the inner end of the supporting connecting rod 12; the driving mechanism includes a driving bridge 13, and the driving bridge 13 is fixedly installed on the middle part of the bottom surface of the front and rear shock-absorbing leaf springs 11 by bolts, and the bottom of the driving bridge 13 is hingedly connected to the inner end of the supporting connecting rod 12, and a transmission drum 14 is fixedly arranged in the middle part of the driving bridge 13, and a driving connecting rod 15 is rotatably arranged inside the transmission drum 14 through a bearing; the driving mechanism includes a driving shaft 16 rotatably arranged on both front and rear sides of the driving bridge 13 through bearings, and the outer end of the driving shaft 16 is fixedly connected to the driving wheel group 5 by bolts, and the inner end of the driving shaft 16 extends to the inside of the transmission drum 14 and realizes transmission between the driving connecting rod 15.

[0028] like Figure 4 , Figure 8 As shown, the trailer carrier frame 1 is first connected to the driving vehicle, and the driving connecting rod 15 extending from the bottom of the trailer carrier frame 1 is connected to the driving member of the vehicle body. Then, during the driving process of the vehicle body, the transmission drive shaft 16 rotates, and the driving shaft 16 rotates through the spline and differential installed inside the transmission drum 14, thereby driving the front and rear distributed driving shafts 16 and the driving wheel set 5 to rotate, thereby providing driving force for the trailer carrier frame 1, so as to reduce the traction burden of the vehicle body and improve the passing ability of the trailer carrier frame 1 under extreme terrain.

[0029] Furthermore, while the driving wheel group 5 provides driving force for the trailer carrier frame 1, the driving top plate 4 connects the shock-absorbing leaf spring 11 through the connecting support seat 10 on the bottom surface, and at the same time, the bottom end of the adjacent connecting support seat 10 is hinged to the supporting link 12, so that the driving wheel group 5 can be supported by the shock-absorbing leaf spring 11 and the supporting link 12, so as to achieve the effect of shock absorption and improving stability in pothole conditions.

[0030] Embodiment 2: In order to solve the problems existing in the use of the existing central axle trailer, this embodiment adopts the following technical scheme: a steering mechanism is arranged in the middle of the bottom surface of the driving mechanism, and the steering mechanism includes a steering fan plate 6, and a steering drive shaft 7 is slidably arranged inside the steering fan plate 6; the steering fan plate 6 included in the steering mechanism is fixedly installed in the middle of the bottom surface of the driving top plate 4, and a steering positioning plate 17 is fixedly arranged on the bottom surface of the driving top plate 4, and the bottom end of the steering positioning plate 17 is meshed with the steering drive shaft 7 through a bevel gear set 18, and a positioning frame 19 is installed on the outer wall of the steering drive shaft 7.

[0031] The driving top plate 4 included in the steering mechanism is rotatably arranged on the bottom surface of the trailer carrier frame 1 through the steering positioning disk 17 at the internal center position, and the steering fan plate 6 included in the steering mechanism is used to support the steering drive shaft 7 and the positioning frame 19, and the steering drive shaft 7 rotates inside the steering fan plate 6 and revolves around the steering positioning disk 17.

[0032] like Figure 5-Figure 6 , Fig. 9 As shown, during the steering process, the driving body drives the steering drive shaft 7 under the driving top plate 4 to rotate through the steering system, and the steering drive shaft 7 is installed inside the steering fan plate 6 through the positioning frame 19. At the same time, during the rotation of the steering drive shaft 7, the steering positioning plate 17 on the bottom surface of the driving top plate 4 is driven to rotate through the bevel gear group 18. At the same time, the steering positioning plate 17 drives the driving top plate 4 to rotate under the trailer carrier frame 1, and the driving wheel group 5 and its supporting components follow, so as to increase the steering angle and convenience of the mid-axle trailer.

[0033] Embodiment 3: In order to solve the problems existing in the use of the existing central axle trailer, the present embodiment adopts the following technical scheme, wherein support mechanisms are provided on both the front and rear sides of the bottom of the driving mechanism, and the support mechanism includes a support frame 8, and damping supports 9 are slidably provided on both the left and right sides of the bottom surface of the symmetrically arranged support frame 8; the support mechanism includes a resistance flip rod 20, and the inner end of the resistance flip rod 20 is hingedly connected to the front and rear sides of the external positioning frame 19 of the steering drive shaft 7, and the outer end of the resistance flip rod 20 slides through the interior of the support frame 8, and the outer end of the resistance flip rod 20 is hingedly connected to a guide slider 21.

[0034] The supporting mechanism includes a spiral rotating rod 22, and the left end spiral of the spiral rotating rod 22 passes through the interior of the guide slider 21, and the left and right outer walls of the spiral rotating rod 22 are fixedly provided with driving gears 23, and the inner side of the driving gear 23 is meshed with a driving tooth plate 24, and the bottom end of the driving tooth plate 24 is fixedly connected to the top surface of the damping support 9, and the damping support 9 is used to support the shock-absorbing leaf spring 11 distributed correspondingly below.

[0035] like Figure 9-11 As shown, during the steering rotation process, the steering drive shaft 7 of the steering mechanism drives the positioning frame 19 and the externally hinged resistance flip rod 20 to flip, and the resistance flip rod 20 moves with the guide slider 21 linked to the outer end, so that the guide slider 21 drives the spirally connected spiral rotating rod 22 to rotate, and then the driving gear 23 fixedly installed on the outer wall of the spiral rotating rod 22 engages with the driving gear plate 24 to slide downward, thereby driving the damping support 9 fixedly connected at the bottom to descend, and then resists the top of the corresponding shock-absorbing leaf spring 11, so as to support the excessive deformation of the shock-absorbing leaf spring 11 during the steering tilt process, thereby reducing the inclination of the trailer carrier frame 1 during the steering process.

[0036] Furthermore, the positioning frame 19 drives the resistance flip rod 20 on the other side away from the supporting frame 8, so that the damping support 9 on the other side moves upward and increases the distance with the corresponding shock-absorbing leaf spring 11, thereby adjusting the supporting performance of the shock-absorbing leaf spring 11 on the other side during the steering process, so as to achieve a balanced support effect during tilting.

[0037] The supporting mechanism includes a pressure water tank 25 fixedly installed on the inner side of the supporting frame 8, and the left and right sides of the outside of the pressure water tank 25 are connected to the upper end of the cooling spray pipe 26, and the lower end of the cooling spray pipe 26 extends to the outside of the corresponding shock-absorbing leaf spring 11; the inner side of the damping support 9 included in the supporting mechanism is fixedly connected to the pressure valve plate of the pressure water tank 25, and the damping support 9 moves after being deformed and resisted by the shock-absorbing leaf spring 11, and sprays the shock-absorbing leaf spring 11 through the pressure water tank 25 and the cooling spray pipe 26 that is connected through the pressure water tank 25 to achieve cooling and heat dissipation.

[0038] like Figure 7 , Figure 11-Figure 12 As shown, during the steering process, the corresponding shock-absorbing leaf spring 11 is deformed, and then moves against the damping support 9 above, and then the damping support 9 contacts the pressure valve plate inside the pressure water tank 25, so as to assist in squeezing the cooling water inside the pressure water tank 25 to spray and cool the shock-absorbing leaf spring 11 through the through-connected cooling spray pipe 26, thereby avoiding the shock-absorbing leaf spring 11 that has been reciprocatingly deformed for a long time and reducing the supporting effect due to high temperature, thereby improving the stability of the overall trailer during transportation and steering.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary supported follow-up steering type mid-axle trailer, comprising a trailer carrier frame (1), and a bearing bottom plate (2) fixedly mounted on the top surface of the trailer carrier frame (1), and a telescopic support assembly (3) is arranged below the right end of the trailer carrier frame (1); It is characterized in that Also includes: A driving mechanism is provided in the middle of the bottom surface of the trailer carrier frame (1), and the driving mechanism includes a driving top plate (4), and driving wheel sets (5) are provided on the front and rear sides of the bottom surface of the driving top plate (4) in a left-right symmetrical manner; A steering mechanism is provided in the middle of the bottom surface of the driving mechanism, and the steering mechanism includes a steering fan plate (6), and a steering drive shaft (7) is slidably provided inside the steering fan plate (6); Wherein, support mechanisms are arranged on both the front and rear sides of the bottom of the driving mechanism, and the support mechanisms include a support frame (8), and damping supports (9) are slidably arranged on both the left and right sides of the bottom of the symmetrically arranged support frame (8).

2. The auxiliary support follow-up steering type mid-axle trailer according to claim 1, characterized in that: The driving mechanism comprises a connecting support seat (10), and the connecting support seat (10) is fixedly installed on the bottom surface of the driving top plate (4) in a front-to-back symmetrical manner at equal distances, and a shock-absorbing leaf spring (11) is rotatably arranged on the upper part of the adjacent connecting support seat (10), and the lower part of the adjacent connecting support seat (10) is hingedly connected to the inner end of the supporting connecting rod (12).

3. The auxiliary support follow-up steering type mid-axle trailer according to claim 2, characterized in that: The driving mechanism comprises a driving bridge (13), and the driving bridge (13) is fixedly mounted on the middle part of the bottom surface of the front and rear damping leaf springs (11) by means of bolts, and the bottom of the driving bridge (13) is hingedly connected to the inner end of the supporting connecting rod (12), and a driving drum (14) is fixedly arranged in the middle part of the driving bridge (13), and a driving connecting rod (15) is rotatably arranged inside the driving drum (14) via a bearing.

4. The auxiliary supported follow-up steering type mid-axle trailer according to claim 3, characterized in that: The driving mechanism comprises a driving connecting bridge (13) having a driving shaft (16) rotatably arranged on both the front and rear sides thereof via bearings, and an outer end of the driving shaft (16) is fixedly connected to a driving wheel set (5) via bolts, and an inner end of the driving shaft (16) extends to the interior of a driving drum (14) to realize transmission with a driving connecting rod (15).

5. The auxiliary support follow-up steering type mid-axle trailer according to claim 1, characterized in that: The steering mechanism comprises a steering fan plate (6) fixedly mounted on the middle part of the bottom surface of the driving top plate (4), and a steering positioning plate (17) is fixedly arranged on the bottom surface of the driving top plate (4), and the bottom end of the steering positioning plate (17) and the steering drive shaft (7) are meshedly connected with each other via a bevel gear set (18), and a positioning frame (19) is sleeved and mounted on the outer wall of the steering drive shaft (7).

6. The auxiliary supported follow-up steering type mid-axle trailer according to claim 5, characterized in that: The driving top plate (4) included in the steering mechanism is rotatably arranged on the bottom surface of the trailer carrier frame (1) via a steering positioning disk (17) at an internal center position, and the steering fan plate (6) included in the steering mechanism is used to support the steering drive shaft (7) and the positioning frame (19), and the steering drive shaft (7) rotates inside the steering fan plate (6) and revolves around the steering positioning disk (17).

7. The auxiliary support follow-up steering type mid-axle trailer according to claim 1, characterized in that: The support mechanism includes a resistance flip rod (20), wherein the inner end of the resistance flip rod (20) is hingedly connected to the front and rear sides of the external positioning frame (19) of the steering drive shaft (7), and the outer end of the resistance flip rod (20) slides through the interior of the support frame (8), and the outer end of the resistance flip rod (20) is hingedly connected to a guide slider (21).

8. The auxiliary support follow-up steering type mid-axle trailer according to claim 7, characterized in that: The support mechanism comprises a spiral rotating rod (22), wherein the left end of the spiral rotating rod (22) spirally penetrates the interior of the guide slider (21), and driving gears (23) are fixedly arranged on the left and right outer walls of the spiral rotating rod (22), and a driving tooth plate (24) is meshedly arranged on the inner side of the driving gear (23), and the bottom end of the driving tooth plate (24) is fixedly connected to the top surface of the damping support (9), and the damping support (9) is used to support the damping leaf spring (11) correspondingly distributed below.

9. The auxiliary supported follow-up steering type mid-axle trailer according to claim 1, characterized in that: The support mechanism comprises a pressure water tank (25) fixedly mounted on the inner side of the support frame (8), and both left and right sides of the outer side of the pressure water tank (25) are connected to the upper end of the cooling spray pipe (26), and the lower end of the cooling spray pipe (26) extends to the outside of the corresponding damping leaf spring (11).

10. The auxiliary supported follow-up steering type mid-axle trailer according to claim 9, characterized in that: The inner side of the damping supporter (9) included in the support mechanism is fixedly connected to the pressure valve plate of the pressure water tank (25), and the damping supporter (9) moves after being deformed and resisted by the shock-absorbing leaf spring (11), and sprays the shock-absorbing leaf spring (11) through the pressure water tank (25) and the cooling spray pipe (26) that is connected through the pressure water tank (25) to achieve cooling and heat dissipation.

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